| 1 | /* $NetBSD: key.c,v 1.101 2016/07/20 07:37:51 ozaki-r Exp $ */ |
| 2 | /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ |
| 3 | /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ |
| 4 | |
| 5 | /* |
| 6 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the project nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.101 2016/07/20 07:37:51 ozaki-r Exp $" ); |
| 36 | |
| 37 | /* |
| 38 | * This code is referd to RFC 2367 |
| 39 | */ |
| 40 | |
| 41 | #include "opt_inet.h" |
| 42 | #ifdef __FreeBSD__ |
| 43 | #include "opt_inet6.h" |
| 44 | #endif |
| 45 | #include "opt_ipsec.h" |
| 46 | #ifdef __NetBSD__ |
| 47 | #include "opt_gateway.h" |
| 48 | #endif |
| 49 | |
| 50 | #include <sys/types.h> |
| 51 | #include <sys/param.h> |
| 52 | #include <sys/systm.h> |
| 53 | #include <sys/callout.h> |
| 54 | #include <sys/kernel.h> |
| 55 | #include <sys/mbuf.h> |
| 56 | #include <sys/domain.h> |
| 57 | #include <sys/protosw.h> |
| 58 | #include <sys/malloc.h> |
| 59 | #include <sys/socket.h> |
| 60 | #include <sys/socketvar.h> |
| 61 | #include <sys/sysctl.h> |
| 62 | #include <sys/errno.h> |
| 63 | #include <sys/proc.h> |
| 64 | #include <sys/queue.h> |
| 65 | #include <sys/syslog.h> |
| 66 | #include <sys/once.h> |
| 67 | #include <sys/cprng.h> |
| 68 | |
| 69 | #include <net/if.h> |
| 70 | #include <net/route.h> |
| 71 | #include <net/raw_cb.h> |
| 72 | |
| 73 | #include <netinet/in.h> |
| 74 | #include <netinet/in_systm.h> |
| 75 | #include <netinet/ip.h> |
| 76 | #include <netinet/in_var.h> |
| 77 | #ifdef INET |
| 78 | #include <netinet/ip_var.h> |
| 79 | #endif |
| 80 | |
| 81 | #ifdef INET6 |
| 82 | #include <netinet/ip6.h> |
| 83 | #include <netinet6/in6_var.h> |
| 84 | #include <netinet6/ip6_var.h> |
| 85 | #endif /* INET6 */ |
| 86 | |
| 87 | #ifdef INET |
| 88 | #include <netinet/in_pcb.h> |
| 89 | #endif |
| 90 | #ifdef INET6 |
| 91 | #include <netinet6/in6_pcb.h> |
| 92 | #endif /* INET6 */ |
| 93 | |
| 94 | #include <net/pfkeyv2.h> |
| 95 | #include <netipsec/keydb.h> |
| 96 | #include <netipsec/key.h> |
| 97 | #include <netipsec/keysock.h> |
| 98 | #include <netipsec/key_debug.h> |
| 99 | |
| 100 | #include <netipsec/ipsec.h> |
| 101 | #ifdef INET6 |
| 102 | #include <netipsec/ipsec6.h> |
| 103 | #endif |
| 104 | #include <netipsec/ipsec_private.h> |
| 105 | |
| 106 | #include <netipsec/xform.h> |
| 107 | #include <netipsec/ipsec_osdep.h> |
| 108 | #include <netipsec/ipcomp.h> |
| 109 | |
| 110 | |
| 111 | #include <net/net_osdep.h> |
| 112 | |
| 113 | #define FULLMASK 0xff |
| 114 | #define _BITS(bytes) ((bytes) << 3) |
| 115 | |
| 116 | #define PORT_NONE 0 |
| 117 | #define PORT_LOOSE 1 |
| 118 | #define PORT_STRICT 2 |
| 119 | |
| 120 | percpu_t *pfkeystat_percpu; |
| 121 | |
| 122 | /* |
| 123 | * Note on SA reference counting: |
| 124 | * - SAs that are not in DEAD state will have (total external reference + 1) |
| 125 | * following value in reference count field. they cannot be freed and are |
| 126 | * referenced from SA header. |
| 127 | * - SAs that are in DEAD state will have (total external reference) |
| 128 | * in reference count field. they are ready to be freed. reference from |
| 129 | * SA header will be removed in key_delsav(), when the reference count |
| 130 | * field hits 0 (= no external reference other than from SA header. |
| 131 | */ |
| 132 | |
| 133 | u_int32_t key_debug_level = 0; |
| 134 | static u_int key_spi_trycnt = 1000; |
| 135 | static u_int32_t key_spi_minval = 0x100; |
| 136 | static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ |
| 137 | static u_int32_t policy_id = 0; |
| 138 | static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ |
| 139 | static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ |
| 140 | static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ |
| 141 | static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ |
| 142 | static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ |
| 143 | |
| 144 | static u_int32_t acq_seq = 0; |
| 145 | |
| 146 | static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ |
| 147 | static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ |
| 148 | static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; |
| 149 | /* registed list */ |
| 150 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 151 | static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ |
| 152 | #endif |
| 153 | static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ |
| 154 | |
| 155 | /* search order for SAs */ |
| 156 | /* |
| 157 | * This order is important because we must select the oldest SA |
| 158 | * for outbound processing. For inbound, This is not important. |
| 159 | */ |
| 160 | static const u_int saorder_state_valid_prefer_old[] = { |
| 161 | SADB_SASTATE_DYING, SADB_SASTATE_MATURE, |
| 162 | }; |
| 163 | static const u_int saorder_state_valid_prefer_new[] = { |
| 164 | SADB_SASTATE_MATURE, SADB_SASTATE_DYING, |
| 165 | }; |
| 166 | |
| 167 | static const u_int saorder_state_alive[] = { |
| 168 | /* except DEAD */ |
| 169 | SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL |
| 170 | }; |
| 171 | static const u_int saorder_state_any[] = { |
| 172 | SADB_SASTATE_MATURE, SADB_SASTATE_DYING, |
| 173 | SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD |
| 174 | }; |
| 175 | |
| 176 | static const int minsize[] = { |
| 177 | sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ |
| 178 | sizeof(struct sadb_sa), /* SADB_EXT_SA */ |
| 179 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ |
| 180 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ |
| 181 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ |
| 182 | sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ |
| 183 | sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ |
| 184 | sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ |
| 185 | sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ |
| 186 | sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ |
| 187 | sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ |
| 188 | sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ |
| 189 | sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ |
| 190 | sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ |
| 191 | sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ |
| 192 | sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ |
| 193 | sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ |
| 194 | 0, /* SADB_X_EXT_KMPRIVATE */ |
| 195 | sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ |
| 196 | sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ |
| 197 | sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ |
| 198 | sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ |
| 199 | sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ |
| 200 | sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ |
| 201 | sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ |
| 202 | sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ |
| 203 | }; |
| 204 | static const int maxsize[] = { |
| 205 | sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ |
| 206 | sizeof(struct sadb_sa), /* SADB_EXT_SA */ |
| 207 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ |
| 208 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ |
| 209 | sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ |
| 210 | 0, /* SADB_EXT_ADDRESS_SRC */ |
| 211 | 0, /* SADB_EXT_ADDRESS_DST */ |
| 212 | 0, /* SADB_EXT_ADDRESS_PROXY */ |
| 213 | 0, /* SADB_EXT_KEY_AUTH */ |
| 214 | 0, /* SADB_EXT_KEY_ENCRYPT */ |
| 215 | 0, /* SADB_EXT_IDENTITY_SRC */ |
| 216 | 0, /* SADB_EXT_IDENTITY_DST */ |
| 217 | 0, /* SADB_EXT_SENSITIVITY */ |
| 218 | 0, /* SADB_EXT_PROPOSAL */ |
| 219 | 0, /* SADB_EXT_SUPPORTED_AUTH */ |
| 220 | 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ |
| 221 | sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ |
| 222 | 0, /* SADB_X_EXT_KMPRIVATE */ |
| 223 | 0, /* SADB_X_EXT_POLICY */ |
| 224 | sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ |
| 225 | sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ |
| 226 | sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ |
| 227 | sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ |
| 228 | 0, /* SADB_X_EXT_NAT_T_OAI */ |
| 229 | 0, /* SADB_X_EXT_NAT_T_OAR */ |
| 230 | sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ |
| 231 | }; |
| 232 | |
| 233 | static int ipsec_esp_keymin = 256; |
| 234 | static int ipsec_esp_auth = 0; |
| 235 | static int ipsec_ah_keymin = 128; |
| 236 | |
| 237 | #ifdef SYSCTL_DECL |
| 238 | SYSCTL_DECL(_net_key); |
| 239 | #endif |
| 240 | |
| 241 | #ifdef SYSCTL_INT |
| 242 | SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ |
| 243 | &key_debug_level, 0, "" ); |
| 244 | |
| 245 | /* max count of trial for the decision of spi value */ |
| 246 | SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ |
| 247 | &key_spi_trycnt, 0, "" ); |
| 248 | |
| 249 | /* minimum spi value to allocate automatically. */ |
| 250 | SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ |
| 251 | &key_spi_minval, 0, "" ); |
| 252 | |
| 253 | /* maximun spi value to allocate automatically. */ |
| 254 | SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ |
| 255 | &key_spi_maxval, 0, "" ); |
| 256 | |
| 257 | /* interval to initialize randseed */ |
| 258 | SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ |
| 259 | &key_int_random, 0, "" ); |
| 260 | |
| 261 | /* lifetime for larval SA */ |
| 262 | SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ |
| 263 | &key_larval_lifetime, 0, "" ); |
| 264 | |
| 265 | /* counter for blocking to send SADB_ACQUIRE to IKEd */ |
| 266 | SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ |
| 267 | &key_blockacq_count, 0, "" ); |
| 268 | |
| 269 | /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ |
| 270 | SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ |
| 271 | &key_blockacq_lifetime, 0, "" ); |
| 272 | |
| 273 | /* ESP auth */ |
| 274 | SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ |
| 275 | &ipsec_esp_auth, 0, "" ); |
| 276 | |
| 277 | /* minimum ESP key length */ |
| 278 | SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ |
| 279 | &ipsec_esp_keymin, 0, "" ); |
| 280 | |
| 281 | /* minimum AH key length */ |
| 282 | SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ |
| 283 | &ipsec_ah_keymin, 0, "" ); |
| 284 | |
| 285 | /* perfered old SA rather than new SA */ |
| 286 | SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ |
| 287 | &key_prefered_oldsa, 0, "" ); |
| 288 | #endif /* SYSCTL_INT */ |
| 289 | |
| 290 | #ifndef LIST_FOREACH |
| 291 | #define LIST_FOREACH(elm, head, field) \ |
| 292 | for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) |
| 293 | #endif |
| 294 | #define __LIST_CHAINED(elm) \ |
| 295 | (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) |
| 296 | #define LIST_INSERT_TAIL(head, elm, type, field) \ |
| 297 | do {\ |
| 298 | struct type *curelm = LIST_FIRST(head); \ |
| 299 | if (curelm == NULL) {\ |
| 300 | LIST_INSERT_HEAD(head, elm, field); \ |
| 301 | } else { \ |
| 302 | while (LIST_NEXT(curelm, field)) \ |
| 303 | curelm = LIST_NEXT(curelm, field);\ |
| 304 | LIST_INSERT_AFTER(curelm, elm, field);\ |
| 305 | }\ |
| 306 | } while (0) |
| 307 | |
| 308 | #define KEY_CHKSASTATE(head, sav, name) \ |
| 309 | /* do */ { \ |
| 310 | if ((head) != (sav)) { \ |
| 311 | ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ |
| 312 | (name), (head), (sav))); \ |
| 313 | continue; \ |
| 314 | } \ |
| 315 | } /* while (0) */ |
| 316 | |
| 317 | #define KEY_CHKSPDIR(head, sp, name) \ |
| 318 | do { \ |
| 319 | if ((head) != (sp)) { \ |
| 320 | ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ |
| 321 | "anyway continue.\n", \ |
| 322 | (name), (head), (sp))); \ |
| 323 | } \ |
| 324 | } while (0) |
| 325 | |
| 326 | MALLOC_DEFINE(M_SECA, "key mgmt" , "security associations, key management" ); |
| 327 | |
| 328 | #if 1 |
| 329 | #define KMALLOC(p, t, n) \ |
| 330 | ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) |
| 331 | #define KFREE(p) \ |
| 332 | free((p), M_SECA) |
| 333 | #else |
| 334 | #define KMALLOC(p, t, n) \ |
| 335 | do { \ |
| 336 | ((p) = malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ |
| 337 | printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ |
| 338 | __FILE__, __LINE__, (p), #t, n); \ |
| 339 | } while (0) |
| 340 | |
| 341 | #define KFREE(p) \ |
| 342 | do { \ |
| 343 | printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ |
| 344 | free((p), M_SECA); \ |
| 345 | } while (0) |
| 346 | #endif |
| 347 | |
| 348 | /* |
| 349 | * set parameters into secpolicyindex buffer. |
| 350 | * Must allocate secpolicyindex buffer passed to this function. |
| 351 | */ |
| 352 | #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ |
| 353 | do { \ |
| 354 | memset((idx), 0, sizeof(struct secpolicyindex)); \ |
| 355 | (idx)->dir = (_dir); \ |
| 356 | (idx)->prefs = (ps); \ |
| 357 | (idx)->prefd = (pd); \ |
| 358 | (idx)->ul_proto = (ulp); \ |
| 359 | memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ |
| 360 | memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ |
| 361 | } while (0) |
| 362 | |
| 363 | /* |
| 364 | * set parameters into secasindex buffer. |
| 365 | * Must allocate secasindex buffer before calling this function. |
| 366 | */ |
| 367 | static int |
| 368 | key_setsecasidx (int, int, int, const struct sadb_address *, |
| 369 | const struct sadb_address *, struct secasindex *); |
| 370 | |
| 371 | /* key statistics */ |
| 372 | struct _keystat { |
| 373 | u_long getspi_count; /* the avarage of count to try to get new SPI */ |
| 374 | } keystat; |
| 375 | |
| 376 | struct sadb_msghdr { |
| 377 | struct sadb_msg *msg; |
| 378 | struct sadb_ext *ext[SADB_EXT_MAX + 1]; |
| 379 | int extoff[SADB_EXT_MAX + 1]; |
| 380 | int extlen[SADB_EXT_MAX + 1]; |
| 381 | }; |
| 382 | |
| 383 | static struct secasvar *key_allocsa_policy (const struct secasindex *); |
| 384 | static void key_freesp_so (struct secpolicy **); |
| 385 | static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); |
| 386 | static void key_delsp (struct secpolicy *); |
| 387 | static struct secpolicy *key_getsp (const struct secpolicyindex *); |
| 388 | static struct secpolicy *key_getspbyid (u_int32_t); |
| 389 | static u_int16_t key_newreqid (void); |
| 390 | static struct mbuf *key_gather_mbuf (struct mbuf *, |
| 391 | const struct sadb_msghdr *, int, int, ...); |
| 392 | static int key_spdadd (struct socket *, struct mbuf *, |
| 393 | const struct sadb_msghdr *); |
| 394 | static u_int32_t key_getnewspid (void); |
| 395 | static int key_spddelete (struct socket *, struct mbuf *, |
| 396 | const struct sadb_msghdr *); |
| 397 | static int key_spddelete2 (struct socket *, struct mbuf *, |
| 398 | const struct sadb_msghdr *); |
| 399 | static int key_spdget (struct socket *, struct mbuf *, |
| 400 | const struct sadb_msghdr *); |
| 401 | static int key_spdflush (struct socket *, struct mbuf *, |
| 402 | const struct sadb_msghdr *); |
| 403 | static int key_spddump (struct socket *, struct mbuf *, |
| 404 | const struct sadb_msghdr *); |
| 405 | static struct mbuf * key_setspddump (int *errorp, pid_t); |
| 406 | static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); |
| 407 | static int key_nat_map (struct socket *, struct mbuf *, |
| 408 | const struct sadb_msghdr *); |
| 409 | static struct mbuf *key_setdumpsp (struct secpolicy *, |
| 410 | u_int8_t, u_int32_t, pid_t); |
| 411 | static u_int key_getspreqmsglen (const struct secpolicy *); |
| 412 | static int key_spdexpire (struct secpolicy *); |
| 413 | static struct secashead *key_newsah (const struct secasindex *); |
| 414 | static void key_delsah (struct secashead *); |
| 415 | static struct secasvar *key_newsav (struct mbuf *, |
| 416 | const struct sadb_msghdr *, struct secashead *, int *, |
| 417 | const char*, int); |
| 418 | #define KEY_NEWSAV(m, sadb, sah, e) \ |
| 419 | key_newsav(m, sadb, sah, e, __FILE__, __LINE__) |
| 420 | static void key_delsav (struct secasvar *); |
| 421 | static struct secashead *key_getsah (const struct secasindex *); |
| 422 | static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); |
| 423 | static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); |
| 424 | static int key_setsaval (struct secasvar *, struct mbuf *, |
| 425 | const struct sadb_msghdr *); |
| 426 | static int key_mature (struct secasvar *); |
| 427 | static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, |
| 428 | u_int8_t, u_int32_t, u_int32_t); |
| 429 | static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); |
| 430 | static struct mbuf *key_setsadbxtype (u_int16_t); |
| 431 | static struct mbuf *key_setsadbxfrag (u_int16_t); |
| 432 | static void key_porttosaddr (union sockaddr_union *, u_int16_t); |
| 433 | static int key_checksalen (const union sockaddr_union *); |
| 434 | static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, |
| 435 | u_int32_t, pid_t, u_int16_t); |
| 436 | static struct mbuf *key_setsadbsa (struct secasvar *); |
| 437 | static struct mbuf *key_setsadbaddr (u_int16_t, |
| 438 | const struct sockaddr *, u_int8_t, u_int16_t); |
| 439 | #if 0 |
| 440 | static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, |
| 441 | int, u_int64_t); |
| 442 | #endif |
| 443 | static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); |
| 444 | static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, |
| 445 | u_int32_t); |
| 446 | static void *key_newbuf (const void *, u_int); |
| 447 | #ifdef INET6 |
| 448 | static int key_ismyaddr6 (const struct sockaddr_in6 *); |
| 449 | #endif |
| 450 | |
| 451 | /* flags for key_cmpsaidx() */ |
| 452 | #define CMP_HEAD 1 /* protocol, addresses. */ |
| 453 | #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ |
| 454 | #define CMP_REQID 3 /* additionally HEAD, reaid. */ |
| 455 | #define CMP_EXACTLY 4 /* all elements. */ |
| 456 | static int key_cmpsaidx |
| 457 | (const struct secasindex *, const struct secasindex *, int); |
| 458 | |
| 459 | static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); |
| 460 | static int key_bbcmp (const void *, const void *, u_int); |
| 461 | static u_int16_t key_satype2proto (u_int8_t); |
| 462 | static u_int8_t key_proto2satype (u_int16_t); |
| 463 | |
| 464 | static int key_getspi (struct socket *, struct mbuf *, |
| 465 | const struct sadb_msghdr *); |
| 466 | static u_int32_t key_do_getnewspi (const struct sadb_spirange *, |
| 467 | const struct secasindex *); |
| 468 | static int key_handle_natt_info (struct secasvar *, |
| 469 | const struct sadb_msghdr *); |
| 470 | static int key_set_natt_ports (union sockaddr_union *, |
| 471 | union sockaddr_union *, |
| 472 | const struct sadb_msghdr *); |
| 473 | static int key_update (struct socket *, struct mbuf *, |
| 474 | const struct sadb_msghdr *); |
| 475 | #ifdef IPSEC_DOSEQCHECK |
| 476 | static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); |
| 477 | #endif |
| 478 | static int key_add (struct socket *, struct mbuf *, |
| 479 | const struct sadb_msghdr *); |
| 480 | static int key_setident (struct secashead *, struct mbuf *, |
| 481 | const struct sadb_msghdr *); |
| 482 | static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, |
| 483 | const struct sadb_msghdr *); |
| 484 | static int key_delete (struct socket *, struct mbuf *, |
| 485 | const struct sadb_msghdr *); |
| 486 | static int key_get (struct socket *, struct mbuf *, |
| 487 | const struct sadb_msghdr *); |
| 488 | |
| 489 | static void key_getcomb_setlifetime (struct sadb_comb *); |
| 490 | static struct mbuf *key_getcomb_esp (void); |
| 491 | static struct mbuf *key_getcomb_ah (void); |
| 492 | static struct mbuf *key_getcomb_ipcomp (void); |
| 493 | static struct mbuf *key_getprop (const struct secasindex *); |
| 494 | |
| 495 | static int key_acquire (const struct secasindex *, struct secpolicy *); |
| 496 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 497 | static struct secacq *key_newacq (const struct secasindex *); |
| 498 | static struct secacq *key_getacq (const struct secasindex *); |
| 499 | static struct secacq *key_getacqbyseq (u_int32_t); |
| 500 | #endif |
| 501 | static struct secspacq *key_newspacq (const struct secpolicyindex *); |
| 502 | static struct secspacq *key_getspacq (const struct secpolicyindex *); |
| 503 | static int key_acquire2 (struct socket *, struct mbuf *, |
| 504 | const struct sadb_msghdr *); |
| 505 | static int key_register (struct socket *, struct mbuf *, |
| 506 | const struct sadb_msghdr *); |
| 507 | static int key_expire (struct secasvar *); |
| 508 | static int key_flush (struct socket *, struct mbuf *, |
| 509 | const struct sadb_msghdr *); |
| 510 | static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, |
| 511 | int *lenp, pid_t pid); |
| 512 | static int key_dump (struct socket *, struct mbuf *, |
| 513 | const struct sadb_msghdr *); |
| 514 | static int key_promisc (struct socket *, struct mbuf *, |
| 515 | const struct sadb_msghdr *); |
| 516 | static int key_senderror (struct socket *, struct mbuf *, int); |
| 517 | static int key_validate_ext (const struct sadb_ext *, int); |
| 518 | static int key_align (struct mbuf *, struct sadb_msghdr *); |
| 519 | #if 0 |
| 520 | static const char *key_getfqdn (void); |
| 521 | static const char *key_getuserfqdn (void); |
| 522 | #endif |
| 523 | static void key_sa_chgstate (struct secasvar *, u_int8_t); |
| 524 | static inline void key_sp_dead (struct secpolicy *); |
| 525 | static void key_sp_unlink (struct secpolicy *sp); |
| 526 | |
| 527 | static struct mbuf *key_alloc_mbuf (int); |
| 528 | struct callout key_timehandler_ch; |
| 529 | |
| 530 | #define SA_ADDREF(p) do { \ |
| 531 | (p)->refcnt++; \ |
| 532 | IPSEC_ASSERT((p)->refcnt != 0, \ |
| 533 | ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ |
| 534 | } while (0) |
| 535 | #define SA_DELREF(p) do { \ |
| 536 | IPSEC_ASSERT((p)->refcnt > 0, \ |
| 537 | ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ |
| 538 | (p)->refcnt--; \ |
| 539 | } while (0) |
| 540 | |
| 541 | #define SP_ADDREF(p) do { \ |
| 542 | (p)->refcnt++; \ |
| 543 | IPSEC_ASSERT((p)->refcnt != 0, \ |
| 544 | ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ |
| 545 | } while (0) |
| 546 | #define SP_DELREF(p) do { \ |
| 547 | IPSEC_ASSERT((p)->refcnt > 0, \ |
| 548 | ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ |
| 549 | (p)->refcnt--; \ |
| 550 | } while (0) |
| 551 | |
| 552 | |
| 553 | static inline void |
| 554 | key_sp_dead(struct secpolicy *sp) |
| 555 | { |
| 556 | |
| 557 | /* mark the SP dead */ |
| 558 | sp->state = IPSEC_SPSTATE_DEAD; |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | key_sp_unlink(struct secpolicy *sp) |
| 563 | { |
| 564 | |
| 565 | /* remove from SP index */ |
| 566 | if (__LIST_CHAINED(sp)) { |
| 567 | LIST_REMOVE(sp, chain); |
| 568 | /* Release refcount held just for being on chain */ |
| 569 | KEY_FREESP(&sp); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | |
| 574 | /* |
| 575 | * Return 0 when there are known to be no SP's for the specified |
| 576 | * direction. Otherwise return 1. This is used by IPsec code |
| 577 | * to optimize performance. |
| 578 | */ |
| 579 | int |
| 580 | key_havesp(u_int dir) |
| 581 | { |
| 582 | return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? |
| 583 | LIST_FIRST(&sptree[dir]) != NULL : 1); |
| 584 | } |
| 585 | |
| 586 | /* %%% IPsec policy management */ |
| 587 | /* |
| 588 | * allocating a SP for OUTBOUND or INBOUND packet. |
| 589 | * Must call key_freesp() later. |
| 590 | * OUT: NULL: not found |
| 591 | * others: found and return the pointer. |
| 592 | */ |
| 593 | struct secpolicy * |
| 594 | key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) |
| 595 | { |
| 596 | struct secpolicy *sp; |
| 597 | int s; |
| 598 | |
| 599 | IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx" )); |
| 600 | IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, |
| 601 | ("key_allocsp: invalid direction %u" , dir)); |
| 602 | |
| 603 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 604 | printf("DP %s from %s:%u\n" , __func__, where, tag)); |
| 605 | |
| 606 | /* get a SP entry */ |
| 607 | s = splsoftnet(); /*called from softclock()*/ |
| 608 | KEYDEBUG(KEYDEBUG_IPSEC_DATA, |
| 609 | printf("*** objects\n" ); |
| 610 | kdebug_secpolicyindex(spidx)); |
| 611 | |
| 612 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 613 | KEYDEBUG(KEYDEBUG_IPSEC_DATA, |
| 614 | printf("*** in SPD\n" ); |
| 615 | kdebug_secpolicyindex(&sp->spidx)); |
| 616 | |
| 617 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 618 | continue; |
| 619 | if (key_cmpspidx_withmask(&sp->spidx, spidx)) |
| 620 | goto found; |
| 621 | } |
| 622 | sp = NULL; |
| 623 | found: |
| 624 | if (sp) { |
| 625 | /* sanity check */ |
| 626 | KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp" ); |
| 627 | |
| 628 | /* found a SPD entry */ |
| 629 | sp->lastused = time_uptime; |
| 630 | SP_ADDREF(sp); |
| 631 | } |
| 632 | splx(s); |
| 633 | |
| 634 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 635 | printf("DP %s return SP:%p (ID=%u) refcnt %u\n" , __func__, |
| 636 | sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); |
| 637 | return sp; |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * allocating a SP for OUTBOUND or INBOUND packet. |
| 642 | * Must call key_freesp() later. |
| 643 | * OUT: NULL: not found |
| 644 | * others: found and return the pointer. |
| 645 | */ |
| 646 | struct secpolicy * |
| 647 | key_allocsp2(u_int32_t spi, |
| 648 | const union sockaddr_union *dst, |
| 649 | u_int8_t proto, |
| 650 | u_int dir, |
| 651 | const char* where, int tag) |
| 652 | { |
| 653 | struct secpolicy *sp; |
| 654 | int s; |
| 655 | |
| 656 | IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst" )); |
| 657 | IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, |
| 658 | ("key_allocsp2: invalid direction %u" , dir)); |
| 659 | |
| 660 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 661 | printf("DP %s from %s:%u\n" , __func__, where, tag)); |
| 662 | |
| 663 | /* get a SP entry */ |
| 664 | s = splsoftnet(); /*called from softclock()*/ |
| 665 | KEYDEBUG(KEYDEBUG_IPSEC_DATA, |
| 666 | printf("*** objects\n" ); |
| 667 | printf("spi %u proto %u dir %u\n" , spi, proto, dir); |
| 668 | kdebug_sockaddr(&dst->sa)); |
| 669 | |
| 670 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 671 | KEYDEBUG(KEYDEBUG_IPSEC_DATA, |
| 672 | printf("*** in SPD\n" ); |
| 673 | kdebug_secpolicyindex(&sp->spidx)); |
| 674 | |
| 675 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 676 | continue; |
| 677 | /* compare simple values, then dst address */ |
| 678 | if (sp->spidx.ul_proto != proto) |
| 679 | continue; |
| 680 | /* NB: spi's must exist and match */ |
| 681 | if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) |
| 682 | continue; |
| 683 | if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT) == 0) |
| 684 | goto found; |
| 685 | } |
| 686 | sp = NULL; |
| 687 | found: |
| 688 | if (sp) { |
| 689 | /* sanity check */ |
| 690 | KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2" ); |
| 691 | |
| 692 | /* found a SPD entry */ |
| 693 | sp->lastused = time_uptime; |
| 694 | SP_ADDREF(sp); |
| 695 | } |
| 696 | splx(s); |
| 697 | |
| 698 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 699 | printf("DP %s return SP:%p (ID=%u) refcnt %u\n" , __func__, |
| 700 | sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); |
| 701 | return sp; |
| 702 | } |
| 703 | |
| 704 | /* |
| 705 | * return a policy that matches this particular inbound packet. |
| 706 | * XXX slow |
| 707 | */ |
| 708 | struct secpolicy * |
| 709 | key_gettunnel(const struct sockaddr *osrc, |
| 710 | const struct sockaddr *odst, |
| 711 | const struct sockaddr *isrc, |
| 712 | const struct sockaddr *idst, |
| 713 | const char* where, int tag) |
| 714 | { |
| 715 | struct secpolicy *sp; |
| 716 | const int dir = IPSEC_DIR_INBOUND; |
| 717 | int s; |
| 718 | struct ipsecrequest *r1, *r2, *p; |
| 719 | struct secpolicyindex spidx; |
| 720 | |
| 721 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 722 | printf("DP %s from %s:%u\n" , __func__, where, tag)); |
| 723 | |
| 724 | if (isrc->sa_family != idst->sa_family) { |
| 725 | ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n." , |
| 726 | isrc->sa_family, idst->sa_family)); |
| 727 | sp = NULL; |
| 728 | goto done; |
| 729 | } |
| 730 | |
| 731 | s = splsoftnet(); /*called from softclock()*/ |
| 732 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 733 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 734 | continue; |
| 735 | |
| 736 | r1 = r2 = NULL; |
| 737 | for (p = sp->req; p; p = p->next) { |
| 738 | if (p->saidx.mode != IPSEC_MODE_TUNNEL) |
| 739 | continue; |
| 740 | |
| 741 | r1 = r2; |
| 742 | r2 = p; |
| 743 | |
| 744 | if (!r1) { |
| 745 | /* here we look at address matches only */ |
| 746 | spidx = sp->spidx; |
| 747 | if (isrc->sa_len > sizeof(spidx.src) || |
| 748 | idst->sa_len > sizeof(spidx.dst)) |
| 749 | continue; |
| 750 | memcpy(&spidx.src, isrc, isrc->sa_len); |
| 751 | memcpy(&spidx.dst, idst, idst->sa_len); |
| 752 | if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) |
| 753 | continue; |
| 754 | } else { |
| 755 | if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, PORT_NONE) || |
| 756 | key_sockaddrcmp(&r1->saidx.dst.sa, idst, PORT_NONE)) |
| 757 | continue; |
| 758 | } |
| 759 | |
| 760 | if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, PORT_NONE) || |
| 761 | key_sockaddrcmp(&r2->saidx.dst.sa, odst, PORT_NONE)) |
| 762 | continue; |
| 763 | |
| 764 | goto found; |
| 765 | } |
| 766 | } |
| 767 | sp = NULL; |
| 768 | found: |
| 769 | if (sp) { |
| 770 | sp->lastused = time_uptime; |
| 771 | SP_ADDREF(sp); |
| 772 | } |
| 773 | splx(s); |
| 774 | done: |
| 775 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 776 | printf("DP %s return SP:%p (ID=%u) refcnt %u\n" , __func__, |
| 777 | sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); |
| 778 | return sp; |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * allocating an SA entry for an *OUTBOUND* packet. |
| 783 | * checking each request entries in SP, and acquire an SA if need. |
| 784 | * OUT: 0: there are valid requests. |
| 785 | * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. |
| 786 | */ |
| 787 | int |
| 788 | key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) |
| 789 | { |
| 790 | u_int level; |
| 791 | int error; |
| 792 | |
| 793 | IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr" )); |
| 794 | IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx" )); |
| 795 | IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || |
| 796 | saidx->mode == IPSEC_MODE_TUNNEL, |
| 797 | ("key_checkrequest: unexpected policy %u" , saidx->mode)); |
| 798 | |
| 799 | /* get current level */ |
| 800 | level = ipsec_get_reqlevel(isr); |
| 801 | |
| 802 | /* |
| 803 | * XXX guard against protocol callbacks from the crypto |
| 804 | * thread as they reference ipsecrequest.sav which we |
| 805 | * temporarily null out below. Need to rethink how we |
| 806 | * handle bundled SA's in the callback thread. |
| 807 | */ |
| 808 | IPSEC_SPLASSERT_SOFTNET("key_checkrequest" ); |
| 809 | #if 0 |
| 810 | /* |
| 811 | * We do allocate new SA only if the state of SA in the holder is |
| 812 | * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. |
| 813 | */ |
| 814 | if (isr->sav != NULL) { |
| 815 | if (isr->sav->sah == NULL) |
| 816 | panic("key_checkrequest: sah is null" ); |
| 817 | if (isr->sav == (struct secasvar *)LIST_FIRST( |
| 818 | &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { |
| 819 | KEY_FREESAV(&isr->sav); |
| 820 | isr->sav = NULL; |
| 821 | } |
| 822 | } |
| 823 | #else |
| 824 | /* |
| 825 | * we free any SA stashed in the IPsec request because a different |
| 826 | * SA may be involved each time this request is checked, either |
| 827 | * because new SAs are being configured, or this request is |
| 828 | * associated with an unconnected datagram socket, or this request |
| 829 | * is associated with a system default policy. |
| 830 | * |
| 831 | * The operation may have negative impact to performance. We may |
| 832 | * want to check cached SA carefully, rather than picking new SA |
| 833 | * every time. |
| 834 | */ |
| 835 | if (isr->sav != NULL) { |
| 836 | KEY_FREESAV(&isr->sav); |
| 837 | isr->sav = NULL; |
| 838 | } |
| 839 | #endif |
| 840 | |
| 841 | /* |
| 842 | * new SA allocation if no SA found. |
| 843 | * key_allocsa_policy should allocate the oldest SA available. |
| 844 | * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. |
| 845 | */ |
| 846 | if (isr->sav == NULL) |
| 847 | isr->sav = key_allocsa_policy(saidx); |
| 848 | |
| 849 | /* When there is SA. */ |
| 850 | if (isr->sav != NULL) { |
| 851 | if (isr->sav->state != SADB_SASTATE_MATURE && |
| 852 | isr->sav->state != SADB_SASTATE_DYING) |
| 853 | return EINVAL; |
| 854 | return 0; |
| 855 | } |
| 856 | |
| 857 | /* there is no SA */ |
| 858 | error = key_acquire(saidx, isr->sp); |
| 859 | if (error != 0) { |
| 860 | /* XXX What should I do ? */ |
| 861 | ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " |
| 862 | "from key_acquire.\n" , error)); |
| 863 | return error; |
| 864 | } |
| 865 | |
| 866 | if (level != IPSEC_LEVEL_REQUIRE) { |
| 867 | /* XXX sigh, the interface to this routine is botched */ |
| 868 | IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA" )); |
| 869 | return 0; |
| 870 | } else { |
| 871 | return ENOENT; |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * allocating a SA for policy entry from SAD. |
| 877 | * NOTE: searching SAD of aliving state. |
| 878 | * OUT: NULL: not found. |
| 879 | * others: found and return the pointer. |
| 880 | */ |
| 881 | static struct secasvar * |
| 882 | key_allocsa_policy(const struct secasindex *saidx) |
| 883 | { |
| 884 | struct secashead *sah; |
| 885 | struct secasvar *sav; |
| 886 | u_int stateidx, state; |
| 887 | const u_int *saorder_state_valid; |
| 888 | int arraysize; |
| 889 | |
| 890 | LIST_FOREACH(sah, &sahtree, chain) { |
| 891 | if (sah->state == SADB_SASTATE_DEAD) |
| 892 | continue; |
| 893 | if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) |
| 894 | goto found; |
| 895 | } |
| 896 | |
| 897 | return NULL; |
| 898 | |
| 899 | found: |
| 900 | |
| 901 | /* |
| 902 | * search a valid state list for outbound packet. |
| 903 | * This search order is important. |
| 904 | */ |
| 905 | if (key_prefered_oldsa) { |
| 906 | saorder_state_valid = saorder_state_valid_prefer_old; |
| 907 | arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); |
| 908 | } else { |
| 909 | saorder_state_valid = saorder_state_valid_prefer_new; |
| 910 | arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); |
| 911 | } |
| 912 | |
| 913 | /* search valid state */ |
| 914 | for (stateidx = 0; |
| 915 | stateidx < arraysize; |
| 916 | stateidx++) { |
| 917 | |
| 918 | state = saorder_state_valid[stateidx]; |
| 919 | |
| 920 | sav = key_do_allocsa_policy(sah, state); |
| 921 | if (sav != NULL) |
| 922 | return sav; |
| 923 | } |
| 924 | |
| 925 | return NULL; |
| 926 | } |
| 927 | |
| 928 | /* |
| 929 | * searching SAD with direction, protocol, mode and state. |
| 930 | * called by key_allocsa_policy(). |
| 931 | * OUT: |
| 932 | * NULL : not found |
| 933 | * others : found, pointer to a SA. |
| 934 | */ |
| 935 | static struct secasvar * |
| 936 | key_do_allocsa_policy(struct secashead *sah, u_int state) |
| 937 | { |
| 938 | struct secasvar *sav, *nextsav, *candidate, *d; |
| 939 | |
| 940 | /* initilize */ |
| 941 | candidate = NULL; |
| 942 | |
| 943 | for (sav = LIST_FIRST(&sah->savtree[state]); |
| 944 | sav != NULL; |
| 945 | sav = nextsav) { |
| 946 | |
| 947 | nextsav = LIST_NEXT(sav, chain); |
| 948 | |
| 949 | /* sanity check */ |
| 950 | KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy" ); |
| 951 | |
| 952 | /* initialize */ |
| 953 | if (candidate == NULL) { |
| 954 | candidate = sav; |
| 955 | continue; |
| 956 | } |
| 957 | |
| 958 | /* Which SA is the better ? */ |
| 959 | |
| 960 | /* sanity check 2 */ |
| 961 | if (candidate->lft_c == NULL || sav->lft_c == NULL) |
| 962 | panic("key_do_allocsa_policy: " |
| 963 | "lifetime_current is NULL" ); |
| 964 | |
| 965 | /* What the best method is to compare ? */ |
| 966 | if (key_prefered_oldsa) { |
| 967 | if (candidate->lft_c->sadb_lifetime_addtime > |
| 968 | sav->lft_c->sadb_lifetime_addtime) { |
| 969 | candidate = sav; |
| 970 | } |
| 971 | continue; |
| 972 | /*NOTREACHED*/ |
| 973 | } |
| 974 | |
| 975 | /* prefered new sa rather than old sa */ |
| 976 | if (candidate->lft_c->sadb_lifetime_addtime < |
| 977 | sav->lft_c->sadb_lifetime_addtime) { |
| 978 | d = candidate; |
| 979 | candidate = sav; |
| 980 | } else |
| 981 | d = sav; |
| 982 | |
| 983 | /* |
| 984 | * prepared to delete the SA when there is more |
| 985 | * suitable candidate and the lifetime of the SA is not |
| 986 | * permanent. |
| 987 | */ |
| 988 | if (d->lft_c->sadb_lifetime_addtime != 0) { |
| 989 | struct mbuf *m, *result = 0; |
| 990 | uint8_t satype; |
| 991 | |
| 992 | key_sa_chgstate(d, SADB_SASTATE_DEAD); |
| 993 | |
| 994 | IPSEC_ASSERT(d->refcnt > 0, |
| 995 | ("key_do_allocsa_policy: bogus ref count" )); |
| 996 | |
| 997 | satype = key_proto2satype(d->sah->saidx.proto); |
| 998 | if (satype == 0) |
| 999 | goto msgfail; |
| 1000 | |
| 1001 | m = key_setsadbmsg(SADB_DELETE, 0, |
| 1002 | satype, 0, 0, d->refcnt - 1); |
| 1003 | if (!m) |
| 1004 | goto msgfail; |
| 1005 | result = m; |
| 1006 | |
| 1007 | /* set sadb_address for saidx's. */ |
| 1008 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 1009 | &d->sah->saidx.src.sa, |
| 1010 | d->sah->saidx.src.sa.sa_len << 3, |
| 1011 | IPSEC_ULPROTO_ANY); |
| 1012 | if (!m) |
| 1013 | goto msgfail; |
| 1014 | m_cat(result, m); |
| 1015 | |
| 1016 | /* set sadb_address for saidx's. */ |
| 1017 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 1018 | &d->sah->saidx.src.sa, |
| 1019 | d->sah->saidx.src.sa.sa_len << 3, |
| 1020 | IPSEC_ULPROTO_ANY); |
| 1021 | if (!m) |
| 1022 | goto msgfail; |
| 1023 | m_cat(result, m); |
| 1024 | |
| 1025 | /* create SA extension */ |
| 1026 | m = key_setsadbsa(d); |
| 1027 | if (!m) |
| 1028 | goto msgfail; |
| 1029 | m_cat(result, m); |
| 1030 | |
| 1031 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 1032 | result = m_pullup(result, |
| 1033 | sizeof(struct sadb_msg)); |
| 1034 | if (result == NULL) |
| 1035 | goto msgfail; |
| 1036 | } |
| 1037 | |
| 1038 | result->m_pkthdr.len = 0; |
| 1039 | for (m = result; m; m = m->m_next) |
| 1040 | result->m_pkthdr.len += m->m_len; |
| 1041 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 1042 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 1043 | |
| 1044 | key_sendup_mbuf(NULL, result, |
| 1045 | KEY_SENDUP_REGISTERED); |
| 1046 | result = 0; |
| 1047 | msgfail: |
| 1048 | if (result) |
| 1049 | m_freem(result); |
| 1050 | KEY_FREESAV(&d); |
| 1051 | } |
| 1052 | } |
| 1053 | |
| 1054 | if (candidate) { |
| 1055 | SA_ADDREF(candidate); |
| 1056 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1057 | printf("DP %s cause refcnt++:%d SA:%p\n" , __func__, |
| 1058 | candidate->refcnt, candidate)); |
| 1059 | } |
| 1060 | return candidate; |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * allocating a usable SA entry for a *INBOUND* packet. |
| 1065 | * Must call key_freesav() later. |
| 1066 | * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). |
| 1067 | * NULL: not found, or error occurred. |
| 1068 | * |
| 1069 | * In the comparison, no source address is used--for RFC2401 conformance. |
| 1070 | * To quote, from section 4.1: |
| 1071 | * A security association is uniquely identified by a triple consisting |
| 1072 | * of a Security Parameter Index (SPI), an IP Destination Address, and a |
| 1073 | * security protocol (AH or ESP) identifier. |
| 1074 | * Note that, however, we do need to keep source address in IPsec SA. |
| 1075 | * IKE specification and PF_KEY specification do assume that we |
| 1076 | * keep source address in IPsec SA. We see a tricky situation here. |
| 1077 | * |
| 1078 | * sport and dport are used for NAT-T. network order is always used. |
| 1079 | */ |
| 1080 | struct secasvar * |
| 1081 | key_allocsa( |
| 1082 | const union sockaddr_union *dst, |
| 1083 | u_int proto, |
| 1084 | u_int32_t spi, |
| 1085 | u_int16_t sport, |
| 1086 | u_int16_t dport, |
| 1087 | const char* where, int tag) |
| 1088 | { |
| 1089 | struct secashead *sah; |
| 1090 | struct secasvar *sav; |
| 1091 | u_int stateidx, state; |
| 1092 | const u_int *saorder_state_valid; |
| 1093 | int arraysize, chkport; |
| 1094 | int s; |
| 1095 | |
| 1096 | int must_check_spi = 1; |
| 1097 | int must_check_alg = 0; |
| 1098 | u_int16_t cpi = 0; |
| 1099 | u_int8_t algo = 0; |
| 1100 | |
| 1101 | if ((sport != 0) && (dport != 0)) |
| 1102 | chkport = PORT_STRICT; |
| 1103 | else |
| 1104 | chkport = PORT_NONE; |
| 1105 | |
| 1106 | IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address" )); |
| 1107 | |
| 1108 | /* |
| 1109 | * XXX IPCOMP case |
| 1110 | * We use cpi to define spi here. In the case where cpi <= |
| 1111 | * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not |
| 1112 | * the real spi. In this case, don't check the spi but check the |
| 1113 | * algorithm |
| 1114 | */ |
| 1115 | |
| 1116 | if (proto == IPPROTO_IPCOMP) { |
| 1117 | u_int32_t tmp; |
| 1118 | tmp = ntohl(spi); |
| 1119 | cpi = (u_int16_t) tmp; |
| 1120 | if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { |
| 1121 | algo = (u_int8_t) cpi; |
| 1122 | must_check_spi = 0; |
| 1123 | must_check_alg = 1; |
| 1124 | } |
| 1125 | } |
| 1126 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1127 | printf("DP %s from %s:%u check_spi=%d, check_alg=%d\n" , |
| 1128 | __func__, where, tag, must_check_spi, must_check_alg)); |
| 1129 | |
| 1130 | |
| 1131 | /* |
| 1132 | * searching SAD. |
| 1133 | * XXX: to be checked internal IP header somewhere. Also when |
| 1134 | * IPsec tunnel packet is received. But ESP tunnel mode is |
| 1135 | * encrypted so we can't check internal IP header. |
| 1136 | */ |
| 1137 | s = splsoftnet(); /*called from softclock()*/ |
| 1138 | if (key_prefered_oldsa) { |
| 1139 | saorder_state_valid = saorder_state_valid_prefer_old; |
| 1140 | arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); |
| 1141 | } else { |
| 1142 | saorder_state_valid = saorder_state_valid_prefer_new; |
| 1143 | arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); |
| 1144 | } |
| 1145 | LIST_FOREACH(sah, &sahtree, chain) { |
| 1146 | /* search valid state */ |
| 1147 | for (stateidx = 0; stateidx < arraysize; stateidx++) { |
| 1148 | state = saorder_state_valid[stateidx]; |
| 1149 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 1150 | KEYDEBUG(KEYDEBUG_MATCH, |
| 1151 | printf("try match spi %#x, %#x\n" , |
| 1152 | ntohl(spi), ntohl(sav->spi))); |
| 1153 | /* sanity check */ |
| 1154 | KEY_CHKSASTATE(sav->state, state, "key_allocsav" ); |
| 1155 | /* do not return entries w/ unusable state */ |
| 1156 | if (sav->state != SADB_SASTATE_MATURE && |
| 1157 | sav->state != SADB_SASTATE_DYING) { |
| 1158 | KEYDEBUG(KEYDEBUG_MATCH, |
| 1159 | printf("bad state %d\n" , |
| 1160 | sav->state)); |
| 1161 | continue; |
| 1162 | } |
| 1163 | if (proto != sav->sah->saidx.proto) { |
| 1164 | KEYDEBUG(KEYDEBUG_MATCH, |
| 1165 | printf("proto fail %d != %d\n" , |
| 1166 | proto, sav->sah->saidx.proto)); |
| 1167 | continue; |
| 1168 | } |
| 1169 | if (must_check_spi && spi != sav->spi) { |
| 1170 | KEYDEBUG(KEYDEBUG_MATCH, |
| 1171 | printf("spi fail %#x != %#x\n" , |
| 1172 | ntohl(spi), ntohl(sav->spi))); |
| 1173 | continue; |
| 1174 | } |
| 1175 | /* XXX only on the ipcomp case */ |
| 1176 | if (must_check_alg && algo != sav->alg_comp) { |
| 1177 | KEYDEBUG(KEYDEBUG_MATCH, |
| 1178 | printf("algo fail %d != %d\n" , |
| 1179 | algo, sav->alg_comp)); |
| 1180 | continue; |
| 1181 | } |
| 1182 | |
| 1183 | #if 0 /* don't check src */ |
| 1184 | /* Fix port in src->sa */ |
| 1185 | |
| 1186 | /* check src address */ |
| 1187 | if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE) != 0) |
| 1188 | continue; |
| 1189 | #endif |
| 1190 | /* fix port of dst address XXX*/ |
| 1191 | key_porttosaddr(__UNCONST(dst), dport); |
| 1192 | /* check dst address */ |
| 1193 | if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) |
| 1194 | continue; |
| 1195 | SA_ADDREF(sav); |
| 1196 | goto done; |
| 1197 | } |
| 1198 | } |
| 1199 | } |
| 1200 | sav = NULL; |
| 1201 | done: |
| 1202 | splx(s); |
| 1203 | |
| 1204 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1205 | printf("DP %s return SA:%p; refcnt %u\n" , __func__, |
| 1206 | sav, sav ? sav->refcnt : 0)); |
| 1207 | return sav; |
| 1208 | } |
| 1209 | |
| 1210 | /* |
| 1211 | * Must be called after calling key_allocsp(). |
| 1212 | * For both the packet without socket and key_freeso(). |
| 1213 | */ |
| 1214 | void |
| 1215 | _key_freesp(struct secpolicy **spp, const char* where, int tag) |
| 1216 | { |
| 1217 | struct secpolicy *sp = *spp; |
| 1218 | |
| 1219 | IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp" )); |
| 1220 | |
| 1221 | SP_DELREF(sp); |
| 1222 | |
| 1223 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1224 | printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n" , |
| 1225 | __func__, sp, sp->id, where, tag, sp->refcnt)); |
| 1226 | |
| 1227 | if (sp->refcnt == 0) { |
| 1228 | *spp = NULL; |
| 1229 | key_delsp(sp); |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | /* |
| 1234 | * Must be called after calling key_allocsp(). |
| 1235 | * For the packet with socket. |
| 1236 | */ |
| 1237 | void |
| 1238 | key_freeso(struct socket *so) |
| 1239 | { |
| 1240 | /* sanity check */ |
| 1241 | IPSEC_ASSERT(so != NULL, ("key_freeso: null so" )); |
| 1242 | |
| 1243 | switch (so->so_proto->pr_domain->dom_family) { |
| 1244 | #ifdef INET |
| 1245 | case PF_INET: |
| 1246 | { |
| 1247 | struct inpcb *pcb = sotoinpcb(so); |
| 1248 | |
| 1249 | /* Does it have a PCB ? */ |
| 1250 | if (pcb == NULL) |
| 1251 | return; |
| 1252 | |
| 1253 | struct inpcbpolicy *sp = pcb->inp_sp; |
| 1254 | key_freesp_so(&sp->sp_in); |
| 1255 | key_freesp_so(&sp->sp_out); |
| 1256 | } |
| 1257 | break; |
| 1258 | #endif |
| 1259 | #ifdef INET6 |
| 1260 | case PF_INET6: |
| 1261 | { |
| 1262 | #ifdef HAVE_NRL_INPCB |
| 1263 | struct inpcb *pcb = sotoinpcb(so); |
| 1264 | struct inpcbpolicy *sp = pcb->inp_sp; |
| 1265 | |
| 1266 | /* Does it have a PCB ? */ |
| 1267 | if (pcb == NULL) |
| 1268 | return; |
| 1269 | key_freesp_so(&sp->sp_in); |
| 1270 | key_freesp_so(&sp->sp_out); |
| 1271 | #else |
| 1272 | struct in6pcb *pcb = sotoin6pcb(so); |
| 1273 | |
| 1274 | /* Does it have a PCB ? */ |
| 1275 | if (pcb == NULL) |
| 1276 | return; |
| 1277 | key_freesp_so(&pcb->in6p_sp->sp_in); |
| 1278 | key_freesp_so(&pcb->in6p_sp->sp_out); |
| 1279 | #endif |
| 1280 | } |
| 1281 | break; |
| 1282 | #endif /* INET6 */ |
| 1283 | default: |
| 1284 | ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n" , |
| 1285 | so->so_proto->pr_domain->dom_family)); |
| 1286 | return; |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | static void |
| 1291 | key_freesp_so(struct secpolicy **sp) |
| 1292 | { |
| 1293 | IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp" )); |
| 1294 | |
| 1295 | if ((*sp)->policy == IPSEC_POLICY_ENTRUST || |
| 1296 | (*sp)->policy == IPSEC_POLICY_BYPASS) |
| 1297 | return; |
| 1298 | |
| 1299 | IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, |
| 1300 | ("key_freesp_so: invalid policy %u" , (*sp)->policy)); |
| 1301 | KEY_FREESP(sp); |
| 1302 | } |
| 1303 | |
| 1304 | /* |
| 1305 | * Must be called after calling key_allocsa(). |
| 1306 | * This function is called by key_freesp() to free some SA allocated |
| 1307 | * for a policy. |
| 1308 | */ |
| 1309 | void |
| 1310 | key_freesav(struct secasvar **psav, const char* where, int tag) |
| 1311 | { |
| 1312 | struct secasvar *sav = *psav; |
| 1313 | |
| 1314 | IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav" )); |
| 1315 | |
| 1316 | SA_DELREF(sav); |
| 1317 | |
| 1318 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1319 | printf("DP %s SA:%p (SPI %lu) from %s:%u; refcnt now %u\n" , |
| 1320 | __func__, sav, (u_long)ntohl(sav->spi), where, tag, |
| 1321 | sav->refcnt)); |
| 1322 | |
| 1323 | if (sav->refcnt == 0) { |
| 1324 | *psav = NULL; |
| 1325 | key_delsav(sav); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | /* %%% SPD management */ |
| 1330 | /* |
| 1331 | * free security policy entry. |
| 1332 | */ |
| 1333 | static void |
| 1334 | key_delsp(struct secpolicy *sp) |
| 1335 | { |
| 1336 | int s; |
| 1337 | |
| 1338 | IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp" )); |
| 1339 | |
| 1340 | key_sp_dead(sp); |
| 1341 | |
| 1342 | IPSEC_ASSERT(sp->refcnt == 0, |
| 1343 | ("key_delsp: SP with references deleted (refcnt %u)" , |
| 1344 | sp->refcnt)); |
| 1345 | |
| 1346 | s = splsoftnet(); /*called from softclock()*/ |
| 1347 | |
| 1348 | { |
| 1349 | struct ipsecrequest *isr = sp->req, *nextisr; |
| 1350 | |
| 1351 | while (isr != NULL) { |
| 1352 | if (isr->sav != NULL) { |
| 1353 | KEY_FREESAV(&isr->sav); |
| 1354 | isr->sav = NULL; |
| 1355 | } |
| 1356 | |
| 1357 | nextisr = isr->next; |
| 1358 | KFREE(isr); |
| 1359 | isr = nextisr; |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | KFREE(sp); |
| 1364 | |
| 1365 | splx(s); |
| 1366 | } |
| 1367 | |
| 1368 | /* |
| 1369 | * search SPD |
| 1370 | * OUT: NULL : not found |
| 1371 | * others : found, pointer to a SP. |
| 1372 | */ |
| 1373 | static struct secpolicy * |
| 1374 | key_getsp(const struct secpolicyindex *spidx) |
| 1375 | { |
| 1376 | struct secpolicy *sp; |
| 1377 | |
| 1378 | IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx" )); |
| 1379 | |
| 1380 | LIST_FOREACH(sp, &sptree[spidx->dir], chain) { |
| 1381 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 1382 | continue; |
| 1383 | if (key_cmpspidx_exactly(spidx, &sp->spidx)) { |
| 1384 | SP_ADDREF(sp); |
| 1385 | return sp; |
| 1386 | } |
| 1387 | } |
| 1388 | |
| 1389 | return NULL; |
| 1390 | } |
| 1391 | |
| 1392 | /* |
| 1393 | * get SP by index. |
| 1394 | * OUT: NULL : not found |
| 1395 | * others : found, pointer to a SP. |
| 1396 | */ |
| 1397 | static struct secpolicy * |
| 1398 | key_getspbyid(u_int32_t id) |
| 1399 | { |
| 1400 | struct secpolicy *sp; |
| 1401 | |
| 1402 | LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { |
| 1403 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 1404 | continue; |
| 1405 | if (sp->id == id) { |
| 1406 | SP_ADDREF(sp); |
| 1407 | return sp; |
| 1408 | } |
| 1409 | } |
| 1410 | |
| 1411 | LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { |
| 1412 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 1413 | continue; |
| 1414 | if (sp->id == id) { |
| 1415 | SP_ADDREF(sp); |
| 1416 | return sp; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | return NULL; |
| 1421 | } |
| 1422 | |
| 1423 | struct secpolicy * |
| 1424 | key_newsp(const char* where, int tag) |
| 1425 | { |
| 1426 | struct secpolicy *newsp = NULL; |
| 1427 | |
| 1428 | newsp = (struct secpolicy *) |
| 1429 | malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); |
| 1430 | if (newsp) { |
| 1431 | newsp->refcnt = 1; |
| 1432 | newsp->req = NULL; |
| 1433 | } |
| 1434 | |
| 1435 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 1436 | printf("DP %s from %s:%u return SP:%p\n" , __func__, |
| 1437 | where, tag, newsp)); |
| 1438 | return newsp; |
| 1439 | } |
| 1440 | |
| 1441 | /* |
| 1442 | * create secpolicy structure from sadb_x_policy structure. |
| 1443 | * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, |
| 1444 | * so must be set properly later. |
| 1445 | */ |
| 1446 | struct secpolicy * |
| 1447 | key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) |
| 1448 | { |
| 1449 | struct secpolicy *newsp; |
| 1450 | |
| 1451 | /* sanity check */ |
| 1452 | if (xpl0 == NULL) |
| 1453 | panic("key_msg2sp: NULL pointer was passed" ); |
| 1454 | if (len < sizeof(*xpl0)) |
| 1455 | panic("key_msg2sp: invalid length" ); |
| 1456 | if (len != PFKEY_EXTLEN(xpl0)) { |
| 1457 | ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n" )); |
| 1458 | *error = EINVAL; |
| 1459 | return NULL; |
| 1460 | } |
| 1461 | |
| 1462 | if ((newsp = KEY_NEWSP()) == NULL) { |
| 1463 | *error = ENOBUFS; |
| 1464 | return NULL; |
| 1465 | } |
| 1466 | |
| 1467 | newsp->spidx.dir = xpl0->sadb_x_policy_dir; |
| 1468 | newsp->policy = xpl0->sadb_x_policy_type; |
| 1469 | |
| 1470 | /* check policy */ |
| 1471 | switch (xpl0->sadb_x_policy_type) { |
| 1472 | case IPSEC_POLICY_DISCARD: |
| 1473 | case IPSEC_POLICY_NONE: |
| 1474 | case IPSEC_POLICY_ENTRUST: |
| 1475 | case IPSEC_POLICY_BYPASS: |
| 1476 | newsp->req = NULL; |
| 1477 | break; |
| 1478 | |
| 1479 | case IPSEC_POLICY_IPSEC: |
| 1480 | { |
| 1481 | int tlen; |
| 1482 | const struct sadb_x_ipsecrequest *xisr; |
| 1483 | uint16_t xisr_reqid; |
| 1484 | struct ipsecrequest **p_isr = &newsp->req; |
| 1485 | |
| 1486 | /* validity check */ |
| 1487 | if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { |
| 1488 | ipseclog((LOG_DEBUG, |
| 1489 | "key_msg2sp: Invalid msg length.\n" )); |
| 1490 | KEY_FREESP(&newsp); |
| 1491 | *error = EINVAL; |
| 1492 | return NULL; |
| 1493 | } |
| 1494 | |
| 1495 | tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); |
| 1496 | xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); |
| 1497 | |
| 1498 | while (tlen > 0) { |
| 1499 | /* length check */ |
| 1500 | if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { |
| 1501 | ipseclog((LOG_DEBUG, "key_msg2sp: " |
| 1502 | "invalid ipsecrequest length.\n" )); |
| 1503 | KEY_FREESP(&newsp); |
| 1504 | *error = EINVAL; |
| 1505 | return NULL; |
| 1506 | } |
| 1507 | |
| 1508 | /* allocate request buffer */ |
| 1509 | KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); |
| 1510 | if ((*p_isr) == NULL) { |
| 1511 | ipseclog((LOG_DEBUG, |
| 1512 | "key_msg2sp: No more memory.\n" )); |
| 1513 | KEY_FREESP(&newsp); |
| 1514 | *error = ENOBUFS; |
| 1515 | return NULL; |
| 1516 | } |
| 1517 | memset(*p_isr, 0, sizeof(**p_isr)); |
| 1518 | |
| 1519 | /* set values */ |
| 1520 | (*p_isr)->next = NULL; |
| 1521 | |
| 1522 | switch (xisr->sadb_x_ipsecrequest_proto) { |
| 1523 | case IPPROTO_ESP: |
| 1524 | case IPPROTO_AH: |
| 1525 | case IPPROTO_IPCOMP: |
| 1526 | break; |
| 1527 | default: |
| 1528 | ipseclog((LOG_DEBUG, |
| 1529 | "key_msg2sp: invalid proto type=%u\n" , |
| 1530 | xisr->sadb_x_ipsecrequest_proto)); |
| 1531 | KEY_FREESP(&newsp); |
| 1532 | *error = EPROTONOSUPPORT; |
| 1533 | return NULL; |
| 1534 | } |
| 1535 | (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; |
| 1536 | |
| 1537 | switch (xisr->sadb_x_ipsecrequest_mode) { |
| 1538 | case IPSEC_MODE_TRANSPORT: |
| 1539 | case IPSEC_MODE_TUNNEL: |
| 1540 | break; |
| 1541 | case IPSEC_MODE_ANY: |
| 1542 | default: |
| 1543 | ipseclog((LOG_DEBUG, |
| 1544 | "key_msg2sp: invalid mode=%u\n" , |
| 1545 | xisr->sadb_x_ipsecrequest_mode)); |
| 1546 | KEY_FREESP(&newsp); |
| 1547 | *error = EINVAL; |
| 1548 | return NULL; |
| 1549 | } |
| 1550 | (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; |
| 1551 | |
| 1552 | switch (xisr->sadb_x_ipsecrequest_level) { |
| 1553 | case IPSEC_LEVEL_DEFAULT: |
| 1554 | case IPSEC_LEVEL_USE: |
| 1555 | case IPSEC_LEVEL_REQUIRE: |
| 1556 | break; |
| 1557 | case IPSEC_LEVEL_UNIQUE: |
| 1558 | xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; |
| 1559 | /* validity check */ |
| 1560 | /* |
| 1561 | * If range violation of reqid, kernel will |
| 1562 | * update it, don't refuse it. |
| 1563 | */ |
| 1564 | if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { |
| 1565 | ipseclog((LOG_DEBUG, |
| 1566 | "key_msg2sp: reqid=%d range " |
| 1567 | "violation, updated by kernel.\n" , |
| 1568 | xisr_reqid)); |
| 1569 | xisr_reqid = 0; |
| 1570 | } |
| 1571 | |
| 1572 | /* allocate new reqid id if reqid is zero. */ |
| 1573 | if (xisr_reqid == 0) { |
| 1574 | u_int16_t reqid; |
| 1575 | if ((reqid = key_newreqid()) == 0) { |
| 1576 | KEY_FREESP(&newsp); |
| 1577 | *error = ENOBUFS; |
| 1578 | return NULL; |
| 1579 | } |
| 1580 | (*p_isr)->saidx.reqid = reqid; |
| 1581 | } else { |
| 1582 | /* set it for manual keying. */ |
| 1583 | (*p_isr)->saidx.reqid = xisr_reqid; |
| 1584 | } |
| 1585 | break; |
| 1586 | |
| 1587 | default: |
| 1588 | ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n" , |
| 1589 | xisr->sadb_x_ipsecrequest_level)); |
| 1590 | KEY_FREESP(&newsp); |
| 1591 | *error = EINVAL; |
| 1592 | return NULL; |
| 1593 | } |
| 1594 | (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; |
| 1595 | |
| 1596 | /* set IP addresses if there */ |
| 1597 | if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { |
| 1598 | const struct sockaddr *paddr; |
| 1599 | |
| 1600 | paddr = (const struct sockaddr *)(xisr + 1); |
| 1601 | |
| 1602 | /* validity check */ |
| 1603 | if (paddr->sa_len |
| 1604 | > sizeof((*p_isr)->saidx.src)) { |
| 1605 | ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " |
| 1606 | "address length.\n" )); |
| 1607 | KEY_FREESP(&newsp); |
| 1608 | *error = EINVAL; |
| 1609 | return NULL; |
| 1610 | } |
| 1611 | memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); |
| 1612 | |
| 1613 | paddr = (const struct sockaddr *)((const char *)paddr |
| 1614 | + paddr->sa_len); |
| 1615 | |
| 1616 | /* validity check */ |
| 1617 | if (paddr->sa_len |
| 1618 | > sizeof((*p_isr)->saidx.dst)) { |
| 1619 | ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " |
| 1620 | "address length.\n" )); |
| 1621 | KEY_FREESP(&newsp); |
| 1622 | *error = EINVAL; |
| 1623 | return NULL; |
| 1624 | } |
| 1625 | memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); |
| 1626 | } |
| 1627 | |
| 1628 | (*p_isr)->sav = NULL; |
| 1629 | (*p_isr)->sp = newsp; |
| 1630 | |
| 1631 | /* initialization for the next. */ |
| 1632 | p_isr = &(*p_isr)->next; |
| 1633 | tlen -= xisr->sadb_x_ipsecrequest_len; |
| 1634 | |
| 1635 | /* validity check */ |
| 1636 | if (tlen < 0) { |
| 1637 | ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n" )); |
| 1638 | KEY_FREESP(&newsp); |
| 1639 | *error = EINVAL; |
| 1640 | return NULL; |
| 1641 | } |
| 1642 | |
| 1643 | xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr |
| 1644 | + xisr->sadb_x_ipsecrequest_len); |
| 1645 | } |
| 1646 | } |
| 1647 | break; |
| 1648 | default: |
| 1649 | ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n" )); |
| 1650 | KEY_FREESP(&newsp); |
| 1651 | *error = EINVAL; |
| 1652 | return NULL; |
| 1653 | } |
| 1654 | |
| 1655 | *error = 0; |
| 1656 | return newsp; |
| 1657 | } |
| 1658 | |
| 1659 | static u_int16_t |
| 1660 | key_newreqid(void) |
| 1661 | { |
| 1662 | static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; |
| 1663 | |
| 1664 | auto_reqid = (auto_reqid == 0xffff |
| 1665 | ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); |
| 1666 | |
| 1667 | /* XXX should be unique check */ |
| 1668 | |
| 1669 | return auto_reqid; |
| 1670 | } |
| 1671 | |
| 1672 | /* |
| 1673 | * copy secpolicy struct to sadb_x_policy structure indicated. |
| 1674 | */ |
| 1675 | struct mbuf * |
| 1676 | key_sp2msg(const struct secpolicy *sp) |
| 1677 | { |
| 1678 | struct sadb_x_policy *xpl; |
| 1679 | int tlen; |
| 1680 | char *p; |
| 1681 | struct mbuf *m; |
| 1682 | |
| 1683 | /* sanity check. */ |
| 1684 | if (sp == NULL) |
| 1685 | panic("key_sp2msg: NULL pointer was passed" ); |
| 1686 | |
| 1687 | tlen = key_getspreqmsglen(sp); |
| 1688 | |
| 1689 | m = key_alloc_mbuf(tlen); |
| 1690 | if (!m || m->m_next) { /*XXX*/ |
| 1691 | if (m) |
| 1692 | m_freem(m); |
| 1693 | return NULL; |
| 1694 | } |
| 1695 | |
| 1696 | m->m_len = tlen; |
| 1697 | m->m_next = NULL; |
| 1698 | xpl = mtod(m, struct sadb_x_policy *); |
| 1699 | memset(xpl, 0, tlen); |
| 1700 | |
| 1701 | xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); |
| 1702 | xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
| 1703 | xpl->sadb_x_policy_type = sp->policy; |
| 1704 | xpl->sadb_x_policy_dir = sp->spidx.dir; |
| 1705 | xpl->sadb_x_policy_id = sp->id; |
| 1706 | p = (char *)xpl + sizeof(*xpl); |
| 1707 | |
| 1708 | /* if is the policy for ipsec ? */ |
| 1709 | if (sp->policy == IPSEC_POLICY_IPSEC) { |
| 1710 | struct sadb_x_ipsecrequest *xisr; |
| 1711 | struct ipsecrequest *isr; |
| 1712 | |
| 1713 | for (isr = sp->req; isr != NULL; isr = isr->next) { |
| 1714 | |
| 1715 | xisr = (struct sadb_x_ipsecrequest *)p; |
| 1716 | |
| 1717 | xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; |
| 1718 | xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; |
| 1719 | xisr->sadb_x_ipsecrequest_level = isr->level; |
| 1720 | xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; |
| 1721 | |
| 1722 | p += sizeof(*xisr); |
| 1723 | memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); |
| 1724 | p += isr->saidx.src.sa.sa_len; |
| 1725 | memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); |
| 1726 | p += isr->saidx.src.sa.sa_len; |
| 1727 | |
| 1728 | xisr->sadb_x_ipsecrequest_len = |
| 1729 | PFKEY_ALIGN8(sizeof(*xisr) |
| 1730 | + isr->saidx.src.sa.sa_len |
| 1731 | + isr->saidx.dst.sa.sa_len); |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | return m; |
| 1736 | } |
| 1737 | |
| 1738 | /* m will not be freed nor modified */ |
| 1739 | static struct mbuf * |
| 1740 | key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, |
| 1741 | int ndeep, int nitem, ...) |
| 1742 | { |
| 1743 | va_list ap; |
| 1744 | int idx; |
| 1745 | int i; |
| 1746 | struct mbuf *result = NULL, *n; |
| 1747 | int len; |
| 1748 | |
| 1749 | if (m == NULL || mhp == NULL) |
| 1750 | panic("null pointer passed to key_gather" ); |
| 1751 | |
| 1752 | va_start(ap, nitem); |
| 1753 | for (i = 0; i < nitem; i++) { |
| 1754 | idx = va_arg(ap, int); |
| 1755 | if (idx < 0 || idx > SADB_EXT_MAX) |
| 1756 | goto fail; |
| 1757 | /* don't attempt to pull empty extension */ |
| 1758 | if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) |
| 1759 | continue; |
| 1760 | if (idx != SADB_EXT_RESERVED && |
| 1761 | (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) |
| 1762 | continue; |
| 1763 | |
| 1764 | if (idx == SADB_EXT_RESERVED) { |
| 1765 | len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 1766 | #ifdef DIAGNOSTIC |
| 1767 | if (len > MHLEN) |
| 1768 | panic("assumption failed" ); |
| 1769 | #endif |
| 1770 | MGETHDR(n, M_DONTWAIT, MT_DATA); |
| 1771 | if (!n) |
| 1772 | goto fail; |
| 1773 | n->m_len = len; |
| 1774 | n->m_next = NULL; |
| 1775 | m_copydata(m, 0, sizeof(struct sadb_msg), |
| 1776 | mtod(n, void *)); |
| 1777 | } else if (i < ndeep) { |
| 1778 | len = mhp->extlen[idx]; |
| 1779 | n = key_alloc_mbuf(len); |
| 1780 | if (!n || n->m_next) { /*XXX*/ |
| 1781 | if (n) |
| 1782 | m_freem(n); |
| 1783 | goto fail; |
| 1784 | } |
| 1785 | m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], |
| 1786 | mtod(n, void *)); |
| 1787 | } else { |
| 1788 | n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], |
| 1789 | M_DONTWAIT); |
| 1790 | } |
| 1791 | if (n == NULL) |
| 1792 | goto fail; |
| 1793 | |
| 1794 | if (result) |
| 1795 | m_cat(result, n); |
| 1796 | else |
| 1797 | result = n; |
| 1798 | } |
| 1799 | va_end(ap); |
| 1800 | |
| 1801 | if (result && (result->m_flags & M_PKTHDR) != 0) { |
| 1802 | result->m_pkthdr.len = 0; |
| 1803 | for (n = result; n; n = n->m_next) |
| 1804 | result->m_pkthdr.len += n->m_len; |
| 1805 | } |
| 1806 | |
| 1807 | return result; |
| 1808 | |
| 1809 | fail: |
| 1810 | va_end(ap); |
| 1811 | m_freem(result); |
| 1812 | return NULL; |
| 1813 | } |
| 1814 | |
| 1815 | /* |
| 1816 | * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing |
| 1817 | * add an entry to SP database, when received |
| 1818 | * <base, address(SD), (lifetime(H),) policy> |
| 1819 | * from the user(?). |
| 1820 | * Adding to SP database, |
| 1821 | * and send |
| 1822 | * <base, address(SD), (lifetime(H),) policy> |
| 1823 | * to the socket which was send. |
| 1824 | * |
| 1825 | * SPDADD set a unique policy entry. |
| 1826 | * SPDSETIDX like SPDADD without a part of policy requests. |
| 1827 | * SPDUPDATE replace a unique policy entry. |
| 1828 | * |
| 1829 | * m will always be freed. |
| 1830 | */ |
| 1831 | static int |
| 1832 | key_spdadd(struct socket *so, struct mbuf *m, |
| 1833 | const struct sadb_msghdr *mhp) |
| 1834 | { |
| 1835 | const struct sadb_address *src0, *dst0; |
| 1836 | const struct sadb_x_policy *xpl0; |
| 1837 | struct sadb_x_policy *xpl; |
| 1838 | const struct sadb_lifetime *lft = NULL; |
| 1839 | struct secpolicyindex spidx; |
| 1840 | struct secpolicy *newsp; |
| 1841 | int error; |
| 1842 | |
| 1843 | /* sanity check */ |
| 1844 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 1845 | panic("key_spdadd: NULL pointer is passed" ); |
| 1846 | |
| 1847 | if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 1848 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || |
| 1849 | mhp->ext[SADB_X_EXT_POLICY] == NULL) { |
| 1850 | ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n" )); |
| 1851 | return key_senderror(so, m, EINVAL); |
| 1852 | } |
| 1853 | if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 1854 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || |
| 1855 | mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { |
| 1856 | ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n" )); |
| 1857 | return key_senderror(so, m, EINVAL); |
| 1858 | } |
| 1859 | if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { |
| 1860 | if (mhp->extlen[SADB_EXT_LIFETIME_HARD] |
| 1861 | < sizeof(struct sadb_lifetime)) { |
| 1862 | ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n" )); |
| 1863 | return key_senderror(so, m, EINVAL); |
| 1864 | } |
| 1865 | lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; |
| 1866 | } |
| 1867 | |
| 1868 | src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; |
| 1869 | dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; |
| 1870 | xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; |
| 1871 | |
| 1872 | /* make secindex */ |
| 1873 | /* XXX boundary check against sa_len */ |
| 1874 | KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, |
| 1875 | src0 + 1, |
| 1876 | dst0 + 1, |
| 1877 | src0->sadb_address_prefixlen, |
| 1878 | dst0->sadb_address_prefixlen, |
| 1879 | src0->sadb_address_proto, |
| 1880 | &spidx); |
| 1881 | |
| 1882 | /* checking the direciton. */ |
| 1883 | switch (xpl0->sadb_x_policy_dir) { |
| 1884 | case IPSEC_DIR_INBOUND: |
| 1885 | case IPSEC_DIR_OUTBOUND: |
| 1886 | break; |
| 1887 | default: |
| 1888 | ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n" )); |
| 1889 | mhp->msg->sadb_msg_errno = EINVAL; |
| 1890 | return 0; |
| 1891 | } |
| 1892 | |
| 1893 | /* check policy */ |
| 1894 | /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ |
| 1895 | if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST |
| 1896 | || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { |
| 1897 | ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n" )); |
| 1898 | return key_senderror(so, m, EINVAL); |
| 1899 | } |
| 1900 | |
| 1901 | /* policy requests are mandatory when action is ipsec. */ |
| 1902 | if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX |
| 1903 | && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC |
| 1904 | && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { |
| 1905 | ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n" )); |
| 1906 | return key_senderror(so, m, EINVAL); |
| 1907 | } |
| 1908 | |
| 1909 | /* |
| 1910 | * checking there is SP already or not. |
| 1911 | * SPDUPDATE doesn't depend on whether there is a SP or not. |
| 1912 | * If the type is either SPDADD or SPDSETIDX AND a SP is found, |
| 1913 | * then error. |
| 1914 | */ |
| 1915 | newsp = key_getsp(&spidx); |
| 1916 | if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { |
| 1917 | if (newsp) { |
| 1918 | key_sp_dead(newsp); |
| 1919 | key_sp_unlink(newsp); /* XXX jrs ordering */ |
| 1920 | KEY_FREESP(&newsp); |
| 1921 | newsp = NULL; |
| 1922 | } |
| 1923 | } else { |
| 1924 | if (newsp != NULL) { |
| 1925 | KEY_FREESP(&newsp); |
| 1926 | ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n" )); |
| 1927 | return key_senderror(so, m, EEXIST); |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | /* allocation new SP entry */ |
| 1932 | if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { |
| 1933 | return key_senderror(so, m, error); |
| 1934 | } |
| 1935 | |
| 1936 | if ((newsp->id = key_getnewspid()) == 0) { |
| 1937 | KFREE(newsp); |
| 1938 | return key_senderror(so, m, ENOBUFS); |
| 1939 | } |
| 1940 | |
| 1941 | /* XXX boundary check against sa_len */ |
| 1942 | KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, |
| 1943 | src0 + 1, |
| 1944 | dst0 + 1, |
| 1945 | src0->sadb_address_prefixlen, |
| 1946 | dst0->sadb_address_prefixlen, |
| 1947 | src0->sadb_address_proto, |
| 1948 | &newsp->spidx); |
| 1949 | |
| 1950 | /* sanity check on addr pair */ |
| 1951 | if (((const struct sockaddr *)(src0 + 1))->sa_family != |
| 1952 | ((const struct sockaddr *)(dst0+ 1))->sa_family) { |
| 1953 | KFREE(newsp); |
| 1954 | return key_senderror(so, m, EINVAL); |
| 1955 | } |
| 1956 | if (((const struct sockaddr *)(src0 + 1))->sa_len != |
| 1957 | ((const struct sockaddr *)(dst0+ 1))->sa_len) { |
| 1958 | KFREE(newsp); |
| 1959 | return key_senderror(so, m, EINVAL); |
| 1960 | } |
| 1961 | |
| 1962 | newsp->created = time_uptime; |
| 1963 | newsp->lastused = newsp->created; |
| 1964 | newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; |
| 1965 | newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; |
| 1966 | |
| 1967 | newsp->refcnt = 1; /* do not reclaim until I say I do */ |
| 1968 | newsp->state = IPSEC_SPSTATE_ALIVE; |
| 1969 | LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); |
| 1970 | |
| 1971 | /* delete the entry in spacqtree */ |
| 1972 | if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { |
| 1973 | struct secspacq *spacq; |
| 1974 | if ((spacq = key_getspacq(&spidx)) != NULL) { |
| 1975 | /* reset counter in order to deletion by timehandler. */ |
| 1976 | spacq->created = time_uptime; |
| 1977 | spacq->count = 0; |
| 1978 | } |
| 1979 | } |
| 1980 | |
| 1981 | #if defined(__NetBSD__) |
| 1982 | /* Invalidate all cached SPD pointers in the PCBs. */ |
| 1983 | ipsec_invalpcbcacheall(); |
| 1984 | |
| 1985 | #if defined(GATEWAY) |
| 1986 | /* Invalidate the ipflow cache, as well. */ |
| 1987 | ipflow_invalidate_all(0); |
| 1988 | #ifdef INET6 |
| 1989 | ip6flow_invalidate_all(0); |
| 1990 | #endif /* INET6 */ |
| 1991 | #endif /* GATEWAY */ |
| 1992 | #endif /* __NetBSD__ */ |
| 1993 | |
| 1994 | { |
| 1995 | struct mbuf *n, *mpolicy; |
| 1996 | struct sadb_msg *newmsg; |
| 1997 | int off; |
| 1998 | |
| 1999 | /* create new sadb_msg to reply. */ |
| 2000 | if (lft) { |
| 2001 | n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, |
| 2002 | SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, |
| 2003 | SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); |
| 2004 | } else { |
| 2005 | n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, |
| 2006 | SADB_X_EXT_POLICY, |
| 2007 | SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); |
| 2008 | } |
| 2009 | if (!n) |
| 2010 | return key_senderror(so, m, ENOBUFS); |
| 2011 | |
| 2012 | if (n->m_len < sizeof(*newmsg)) { |
| 2013 | n = m_pullup(n, sizeof(*newmsg)); |
| 2014 | if (!n) |
| 2015 | return key_senderror(so, m, ENOBUFS); |
| 2016 | } |
| 2017 | newmsg = mtod(n, struct sadb_msg *); |
| 2018 | newmsg->sadb_msg_errno = 0; |
| 2019 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 2020 | |
| 2021 | off = 0; |
| 2022 | mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), |
| 2023 | sizeof(*xpl), &off); |
| 2024 | if (mpolicy == NULL) { |
| 2025 | /* n is already freed */ |
| 2026 | return key_senderror(so, m, ENOBUFS); |
| 2027 | } |
| 2028 | xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); |
| 2029 | if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { |
| 2030 | m_freem(n); |
| 2031 | return key_senderror(so, m, EINVAL); |
| 2032 | } |
| 2033 | xpl->sadb_x_policy_id = newsp->id; |
| 2034 | |
| 2035 | m_freem(m); |
| 2036 | key_update_used(); |
| 2037 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 2038 | } |
| 2039 | } |
| 2040 | |
| 2041 | /* |
| 2042 | * get new policy id. |
| 2043 | * OUT: |
| 2044 | * 0: failure. |
| 2045 | * others: success. |
| 2046 | */ |
| 2047 | static u_int32_t |
| 2048 | key_getnewspid(void) |
| 2049 | { |
| 2050 | u_int32_t newid = 0; |
| 2051 | int count = key_spi_trycnt; /* XXX */ |
| 2052 | struct secpolicy *sp; |
| 2053 | |
| 2054 | /* when requesting to allocate spi ranged */ |
| 2055 | while (count--) { |
| 2056 | newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); |
| 2057 | |
| 2058 | if ((sp = key_getspbyid(newid)) == NULL) |
| 2059 | break; |
| 2060 | |
| 2061 | KEY_FREESP(&sp); |
| 2062 | } |
| 2063 | |
| 2064 | if (count == 0 || newid == 0) { |
| 2065 | ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n" )); |
| 2066 | return 0; |
| 2067 | } |
| 2068 | |
| 2069 | return newid; |
| 2070 | } |
| 2071 | |
| 2072 | /* |
| 2073 | * SADB_SPDDELETE processing |
| 2074 | * receive |
| 2075 | * <base, address(SD), policy(*)> |
| 2076 | * from the user(?), and set SADB_SASTATE_DEAD, |
| 2077 | * and send, |
| 2078 | * <base, address(SD), policy(*)> |
| 2079 | * to the ikmpd. |
| 2080 | * policy(*) including direction of policy. |
| 2081 | * |
| 2082 | * m will always be freed. |
| 2083 | */ |
| 2084 | static int |
| 2085 | key_spddelete(struct socket *so, struct mbuf *m, |
| 2086 | const struct sadb_msghdr *mhp) |
| 2087 | { |
| 2088 | struct sadb_address *src0, *dst0; |
| 2089 | struct sadb_x_policy *xpl0; |
| 2090 | struct secpolicyindex spidx; |
| 2091 | struct secpolicy *sp; |
| 2092 | |
| 2093 | /* sanity check */ |
| 2094 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 2095 | panic("key_spddelete: NULL pointer is passed" ); |
| 2096 | |
| 2097 | if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 2098 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || |
| 2099 | mhp->ext[SADB_X_EXT_POLICY] == NULL) { |
| 2100 | ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n" )); |
| 2101 | return key_senderror(so, m, EINVAL); |
| 2102 | } |
| 2103 | if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 2104 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || |
| 2105 | mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { |
| 2106 | ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n" )); |
| 2107 | return key_senderror(so, m, EINVAL); |
| 2108 | } |
| 2109 | |
| 2110 | src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; |
| 2111 | dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; |
| 2112 | xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; |
| 2113 | |
| 2114 | /* make secindex */ |
| 2115 | /* XXX boundary check against sa_len */ |
| 2116 | KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, |
| 2117 | src0 + 1, |
| 2118 | dst0 + 1, |
| 2119 | src0->sadb_address_prefixlen, |
| 2120 | dst0->sadb_address_prefixlen, |
| 2121 | src0->sadb_address_proto, |
| 2122 | &spidx); |
| 2123 | |
| 2124 | /* checking the direciton. */ |
| 2125 | switch (xpl0->sadb_x_policy_dir) { |
| 2126 | case IPSEC_DIR_INBOUND: |
| 2127 | case IPSEC_DIR_OUTBOUND: |
| 2128 | break; |
| 2129 | default: |
| 2130 | ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n" )); |
| 2131 | return key_senderror(so, m, EINVAL); |
| 2132 | } |
| 2133 | |
| 2134 | /* Is there SP in SPD ? */ |
| 2135 | if ((sp = key_getsp(&spidx)) == NULL) { |
| 2136 | ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n" )); |
| 2137 | return key_senderror(so, m, EINVAL); |
| 2138 | } |
| 2139 | |
| 2140 | /* save policy id to buffer to be returned. */ |
| 2141 | xpl0->sadb_x_policy_id = sp->id; |
| 2142 | |
| 2143 | key_sp_dead(sp); |
| 2144 | key_sp_unlink(sp); /* XXX jrs ordering */ |
| 2145 | KEY_FREESP(&sp); /* ref gained by key_getspbyid */ |
| 2146 | |
| 2147 | #if defined(__NetBSD__) |
| 2148 | /* Invalidate all cached SPD pointers in the PCBs. */ |
| 2149 | ipsec_invalpcbcacheall(); |
| 2150 | |
| 2151 | /* We're deleting policy; no need to invalidate the ipflow cache. */ |
| 2152 | #endif /* __NetBSD__ */ |
| 2153 | |
| 2154 | { |
| 2155 | struct mbuf *n; |
| 2156 | struct sadb_msg *newmsg; |
| 2157 | |
| 2158 | /* create new sadb_msg to reply. */ |
| 2159 | n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, |
| 2160 | SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); |
| 2161 | if (!n) |
| 2162 | return key_senderror(so, m, ENOBUFS); |
| 2163 | |
| 2164 | newmsg = mtod(n, struct sadb_msg *); |
| 2165 | newmsg->sadb_msg_errno = 0; |
| 2166 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 2167 | |
| 2168 | m_freem(m); |
| 2169 | key_update_used(); |
| 2170 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 2171 | } |
| 2172 | } |
| 2173 | |
| 2174 | /* |
| 2175 | * SADB_SPDDELETE2 processing |
| 2176 | * receive |
| 2177 | * <base, policy(*)> |
| 2178 | * from the user(?), and set SADB_SASTATE_DEAD, |
| 2179 | * and send, |
| 2180 | * <base, policy(*)> |
| 2181 | * to the ikmpd. |
| 2182 | * policy(*) including direction of policy. |
| 2183 | * |
| 2184 | * m will always be freed. |
| 2185 | */ |
| 2186 | static int |
| 2187 | key_spddelete2(struct socket *so, struct mbuf *m, |
| 2188 | const struct sadb_msghdr *mhp) |
| 2189 | { |
| 2190 | u_int32_t id; |
| 2191 | struct secpolicy *sp; |
| 2192 | |
| 2193 | /* sanity check */ |
| 2194 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 2195 | panic("key_spddelete2: NULL pointer is passed" ); |
| 2196 | |
| 2197 | if (mhp->ext[SADB_X_EXT_POLICY] == NULL || |
| 2198 | mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { |
| 2199 | ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n" )); |
| 2200 | key_senderror(so, m, EINVAL); |
| 2201 | return 0; |
| 2202 | } |
| 2203 | |
| 2204 | id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; |
| 2205 | |
| 2206 | /* Is there SP in SPD ? */ |
| 2207 | if ((sp = key_getspbyid(id)) == NULL) { |
| 2208 | ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n" , id)); |
| 2209 | return key_senderror(so, m, EINVAL); |
| 2210 | } |
| 2211 | |
| 2212 | key_sp_dead(sp); |
| 2213 | key_sp_unlink(sp); /* XXX jrs ordering */ |
| 2214 | KEY_FREESP(&sp); /* ref gained by key_getsp */ |
| 2215 | sp = NULL; |
| 2216 | |
| 2217 | #if defined(__NetBSD__) |
| 2218 | /* Invalidate all cached SPD pointers in the PCBs. */ |
| 2219 | ipsec_invalpcbcacheall(); |
| 2220 | |
| 2221 | /* We're deleting policy; no need to invalidate the ipflow cache. */ |
| 2222 | #endif /* __NetBSD__ */ |
| 2223 | |
| 2224 | { |
| 2225 | struct mbuf *n, *nn; |
| 2226 | struct sadb_msg *newmsg; |
| 2227 | int off, len; |
| 2228 | |
| 2229 | /* create new sadb_msg to reply. */ |
| 2230 | len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 2231 | |
| 2232 | if (len > MCLBYTES) |
| 2233 | return key_senderror(so, m, ENOBUFS); |
| 2234 | MGETHDR(n, M_DONTWAIT, MT_DATA); |
| 2235 | if (n && len > MHLEN) { |
| 2236 | MCLGET(n, M_DONTWAIT); |
| 2237 | if ((n->m_flags & M_EXT) == 0) { |
| 2238 | m_freem(n); |
| 2239 | n = NULL; |
| 2240 | } |
| 2241 | } |
| 2242 | if (!n) |
| 2243 | return key_senderror(so, m, ENOBUFS); |
| 2244 | |
| 2245 | n->m_len = len; |
| 2246 | n->m_next = NULL; |
| 2247 | off = 0; |
| 2248 | |
| 2249 | m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); |
| 2250 | off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 2251 | |
| 2252 | #ifdef DIAGNOSTIC |
| 2253 | if (off != len) |
| 2254 | panic("length inconsistency in key_spddelete2" ); |
| 2255 | #endif |
| 2256 | |
| 2257 | n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], |
| 2258 | mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); |
| 2259 | if (!n->m_next) { |
| 2260 | m_freem(n); |
| 2261 | return key_senderror(so, m, ENOBUFS); |
| 2262 | } |
| 2263 | |
| 2264 | n->m_pkthdr.len = 0; |
| 2265 | for (nn = n; nn; nn = nn->m_next) |
| 2266 | n->m_pkthdr.len += nn->m_len; |
| 2267 | |
| 2268 | newmsg = mtod(n, struct sadb_msg *); |
| 2269 | newmsg->sadb_msg_errno = 0; |
| 2270 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 2271 | |
| 2272 | m_freem(m); |
| 2273 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 2274 | } |
| 2275 | } |
| 2276 | |
| 2277 | /* |
| 2278 | * SADB_X_GET processing |
| 2279 | * receive |
| 2280 | * <base, policy(*)> |
| 2281 | * from the user(?), |
| 2282 | * and send, |
| 2283 | * <base, address(SD), policy> |
| 2284 | * to the ikmpd. |
| 2285 | * policy(*) including direction of policy. |
| 2286 | * |
| 2287 | * m will always be freed. |
| 2288 | */ |
| 2289 | static int |
| 2290 | key_spdget(struct socket *so, struct mbuf *m, |
| 2291 | const struct sadb_msghdr *mhp) |
| 2292 | { |
| 2293 | u_int32_t id; |
| 2294 | struct secpolicy *sp; |
| 2295 | struct mbuf *n; |
| 2296 | |
| 2297 | /* sanity check */ |
| 2298 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 2299 | panic("key_spdget: NULL pointer is passed" ); |
| 2300 | |
| 2301 | if (mhp->ext[SADB_X_EXT_POLICY] == NULL || |
| 2302 | mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { |
| 2303 | ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n" )); |
| 2304 | return key_senderror(so, m, EINVAL); |
| 2305 | } |
| 2306 | |
| 2307 | id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; |
| 2308 | |
| 2309 | /* Is there SP in SPD ? */ |
| 2310 | if ((sp = key_getspbyid(id)) == NULL) { |
| 2311 | ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n" , id)); |
| 2312 | return key_senderror(so, m, ENOENT); |
| 2313 | } |
| 2314 | |
| 2315 | n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, |
| 2316 | mhp->msg->sadb_msg_pid); |
| 2317 | KEY_FREESP(&sp); /* ref gained by key_getspbyid */ |
| 2318 | if (n != NULL) { |
| 2319 | m_freem(m); |
| 2320 | return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); |
| 2321 | } else |
| 2322 | return key_senderror(so, m, ENOBUFS); |
| 2323 | } |
| 2324 | |
| 2325 | /* |
| 2326 | * SADB_X_SPDACQUIRE processing. |
| 2327 | * Acquire policy and SA(s) for a *OUTBOUND* packet. |
| 2328 | * send |
| 2329 | * <base, policy(*)> |
| 2330 | * to KMD, and expect to receive |
| 2331 | * <base> with SADB_X_SPDACQUIRE if error occurred, |
| 2332 | * or |
| 2333 | * <base, policy> |
| 2334 | * with SADB_X_SPDUPDATE from KMD by PF_KEY. |
| 2335 | * policy(*) is without policy requests. |
| 2336 | * |
| 2337 | * 0 : succeed |
| 2338 | * others: error number |
| 2339 | */ |
| 2340 | int |
| 2341 | key_spdacquire(const struct secpolicy *sp) |
| 2342 | { |
| 2343 | struct mbuf *result = NULL, *m; |
| 2344 | struct secspacq *newspacq; |
| 2345 | int error; |
| 2346 | |
| 2347 | /* sanity check */ |
| 2348 | if (sp == NULL) |
| 2349 | panic("key_spdacquire: NULL pointer is passed" ); |
| 2350 | if (sp->req != NULL) |
| 2351 | panic("key_spdacquire: called but there is request" ); |
| 2352 | if (sp->policy != IPSEC_POLICY_IPSEC) |
| 2353 | panic("key_spdacquire: policy mismathed. IPsec is expected" ); |
| 2354 | |
| 2355 | /* Get an entry to check whether sent message or not. */ |
| 2356 | if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { |
| 2357 | if (key_blockacq_count < newspacq->count) { |
| 2358 | /* reset counter and do send message. */ |
| 2359 | newspacq->count = 0; |
| 2360 | } else { |
| 2361 | /* increment counter and do nothing. */ |
| 2362 | newspacq->count++; |
| 2363 | return 0; |
| 2364 | } |
| 2365 | } else { |
| 2366 | /* make new entry for blocking to send SADB_ACQUIRE. */ |
| 2367 | if ((newspacq = key_newspacq(&sp->spidx)) == NULL) |
| 2368 | return ENOBUFS; |
| 2369 | |
| 2370 | /* add to acqtree */ |
| 2371 | LIST_INSERT_HEAD(&spacqtree, newspacq, chain); |
| 2372 | } |
| 2373 | |
| 2374 | /* create new sadb_msg to reply. */ |
| 2375 | m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); |
| 2376 | if (!m) { |
| 2377 | error = ENOBUFS; |
| 2378 | goto fail; |
| 2379 | } |
| 2380 | result = m; |
| 2381 | |
| 2382 | result->m_pkthdr.len = 0; |
| 2383 | for (m = result; m; m = m->m_next) |
| 2384 | result->m_pkthdr.len += m->m_len; |
| 2385 | |
| 2386 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 2387 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 2388 | |
| 2389 | return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); |
| 2390 | |
| 2391 | fail: |
| 2392 | if (result) |
| 2393 | m_freem(result); |
| 2394 | return error; |
| 2395 | } |
| 2396 | |
| 2397 | /* |
| 2398 | * SADB_SPDFLUSH processing |
| 2399 | * receive |
| 2400 | * <base> |
| 2401 | * from the user, and free all entries in secpctree. |
| 2402 | * and send, |
| 2403 | * <base> |
| 2404 | * to the user. |
| 2405 | * NOTE: what to do is only marking SADB_SASTATE_DEAD. |
| 2406 | * |
| 2407 | * m will always be freed. |
| 2408 | */ |
| 2409 | static int |
| 2410 | key_spdflush(struct socket *so, struct mbuf *m, |
| 2411 | const struct sadb_msghdr *mhp) |
| 2412 | { |
| 2413 | struct sadb_msg *newmsg; |
| 2414 | struct secpolicy *sp; |
| 2415 | u_int dir; |
| 2416 | |
| 2417 | /* sanity check */ |
| 2418 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 2419 | panic("key_spdflush: NULL pointer is passed" ); |
| 2420 | |
| 2421 | if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) |
| 2422 | return key_senderror(so, m, EINVAL); |
| 2423 | |
| 2424 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 2425 | struct secpolicy * nextsp; |
| 2426 | for (sp = LIST_FIRST(&sptree[dir]); |
| 2427 | sp != NULL; |
| 2428 | sp = nextsp) { |
| 2429 | |
| 2430 | nextsp = LIST_NEXT(sp, chain); |
| 2431 | if (sp->state == IPSEC_SPSTATE_DEAD) |
| 2432 | continue; |
| 2433 | key_sp_dead(sp); |
| 2434 | key_sp_unlink(sp); |
| 2435 | /* 'sp' dead; continue transfers to 'sp = nextsp' */ |
| 2436 | continue; |
| 2437 | } |
| 2438 | } |
| 2439 | |
| 2440 | #if defined(__NetBSD__) |
| 2441 | /* Invalidate all cached SPD pointers in the PCBs. */ |
| 2442 | ipsec_invalpcbcacheall(); |
| 2443 | |
| 2444 | /* We're deleting policy; no need to invalidate the ipflow cache. */ |
| 2445 | #endif /* __NetBSD__ */ |
| 2446 | |
| 2447 | if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { |
| 2448 | ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n" )); |
| 2449 | return key_senderror(so, m, ENOBUFS); |
| 2450 | } |
| 2451 | |
| 2452 | if (m->m_next) |
| 2453 | m_freem(m->m_next); |
| 2454 | m->m_next = NULL; |
| 2455 | m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 2456 | newmsg = mtod(m, struct sadb_msg *); |
| 2457 | newmsg->sadb_msg_errno = 0; |
| 2458 | newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); |
| 2459 | |
| 2460 | return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); |
| 2461 | } |
| 2462 | |
| 2463 | static struct sockaddr key_src = { |
| 2464 | .sa_len = 2, |
| 2465 | .sa_family = PF_KEY, |
| 2466 | }; |
| 2467 | |
| 2468 | static struct mbuf * |
| 2469 | key_setspddump_chain(int *errorp, int *lenp, pid_t pid) |
| 2470 | { |
| 2471 | struct secpolicy *sp; |
| 2472 | int cnt; |
| 2473 | u_int dir; |
| 2474 | struct mbuf *m, *n, *prev; |
| 2475 | int totlen; |
| 2476 | |
| 2477 | *lenp = 0; |
| 2478 | |
| 2479 | /* search SPD entry and get buffer size. */ |
| 2480 | cnt = 0; |
| 2481 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 2482 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 2483 | cnt++; |
| 2484 | } |
| 2485 | } |
| 2486 | |
| 2487 | if (cnt == 0) { |
| 2488 | *errorp = ENOENT; |
| 2489 | return (NULL); |
| 2490 | } |
| 2491 | |
| 2492 | m = NULL; |
| 2493 | prev = m; |
| 2494 | totlen = 0; |
| 2495 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 2496 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 2497 | --cnt; |
| 2498 | n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); |
| 2499 | |
| 2500 | if (!n) { |
| 2501 | *errorp = ENOBUFS; |
| 2502 | if (m) m_freem(m); |
| 2503 | return (NULL); |
| 2504 | } |
| 2505 | |
| 2506 | totlen += n->m_pkthdr.len; |
| 2507 | if (!m) { |
| 2508 | m = n; |
| 2509 | } else { |
| 2510 | prev->m_nextpkt = n; |
| 2511 | } |
| 2512 | prev = n; |
| 2513 | } |
| 2514 | } |
| 2515 | |
| 2516 | *lenp = totlen; |
| 2517 | *errorp = 0; |
| 2518 | return (m); |
| 2519 | } |
| 2520 | |
| 2521 | /* |
| 2522 | * SADB_SPDDUMP processing |
| 2523 | * receive |
| 2524 | * <base> |
| 2525 | * from the user, and dump all SP leaves |
| 2526 | * and send, |
| 2527 | * <base> ..... |
| 2528 | * to the ikmpd. |
| 2529 | * |
| 2530 | * m will always be freed. |
| 2531 | */ |
| 2532 | static int |
| 2533 | key_spddump(struct socket *so, struct mbuf *m0, |
| 2534 | const struct sadb_msghdr *mhp) |
| 2535 | { |
| 2536 | struct mbuf *n; |
| 2537 | int error, len; |
| 2538 | int ok, s; |
| 2539 | pid_t pid; |
| 2540 | |
| 2541 | /* sanity check */ |
| 2542 | if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) |
| 2543 | panic("key_spddump: NULL pointer is passed" ); |
| 2544 | |
| 2545 | |
| 2546 | pid = mhp->msg->sadb_msg_pid; |
| 2547 | /* |
| 2548 | * If the requestor has insufficient socket-buffer space |
| 2549 | * for the entire chain, nobody gets any response to the DUMP. |
| 2550 | * XXX For now, only the requestor ever gets anything. |
| 2551 | * Moreover, if the requestor has any space at all, they receive |
| 2552 | * the entire chain, otherwise the request is refused with ENOBUFS. |
| 2553 | */ |
| 2554 | if (sbspace(&so->so_rcv) <= 0) { |
| 2555 | return key_senderror(so, m0, ENOBUFS); |
| 2556 | } |
| 2557 | |
| 2558 | s = splsoftnet(); |
| 2559 | n = key_setspddump_chain(&error, &len, pid); |
| 2560 | splx(s); |
| 2561 | |
| 2562 | if (n == NULL) { |
| 2563 | return key_senderror(so, m0, ENOENT); |
| 2564 | } |
| 2565 | { |
| 2566 | uint64_t *ps = PFKEY_STAT_GETREF(); |
| 2567 | ps[PFKEY_STAT_IN_TOTAL]++; |
| 2568 | ps[PFKEY_STAT_IN_BYTES] += len; |
| 2569 | PFKEY_STAT_PUTREF(); |
| 2570 | } |
| 2571 | |
| 2572 | /* |
| 2573 | * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. |
| 2574 | * The requestor receives either the entire chain, or an |
| 2575 | * error message with ENOBUFS. |
| 2576 | */ |
| 2577 | |
| 2578 | /* |
| 2579 | * sbappendchainwith record takes the chain of entries, one |
| 2580 | * packet-record per SPD entry, prepends the key_src sockaddr |
| 2581 | * to each packet-record, links the sockaddr mbufs into a new |
| 2582 | * list of records, then appends the entire resulting |
| 2583 | * list to the requesting socket. |
| 2584 | */ |
| 2585 | ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, |
| 2586 | n, SB_PRIO_ONESHOT_OVERFLOW); |
| 2587 | |
| 2588 | if (!ok) { |
| 2589 | PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); |
| 2590 | m_freem(n); |
| 2591 | return key_senderror(so, m0, ENOBUFS); |
| 2592 | } |
| 2593 | |
| 2594 | m_freem(m0); |
| 2595 | return error; |
| 2596 | } |
| 2597 | |
| 2598 | /* |
| 2599 | * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 |
| 2600 | */ |
| 2601 | static int |
| 2602 | key_nat_map(struct socket *so, struct mbuf *m, |
| 2603 | const struct sadb_msghdr *mhp) |
| 2604 | { |
| 2605 | struct sadb_x_nat_t_type *type; |
| 2606 | struct sadb_x_nat_t_port *sport; |
| 2607 | struct sadb_x_nat_t_port *dport; |
| 2608 | struct sadb_address *iaddr, *raddr; |
| 2609 | struct sadb_x_nat_t_frag *frag; |
| 2610 | |
| 2611 | /* sanity check */ |
| 2612 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 2613 | panic("key_nat_map: NULL pointer is passed." ); |
| 2614 | |
| 2615 | if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || |
| 2616 | mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || |
| 2617 | mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { |
| 2618 | ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n" )); |
| 2619 | return key_senderror(so, m, EINVAL); |
| 2620 | } |
| 2621 | if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || |
| 2622 | (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || |
| 2623 | (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { |
| 2624 | ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n" )); |
| 2625 | return key_senderror(so, m, EINVAL); |
| 2626 | } |
| 2627 | |
| 2628 | if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && |
| 2629 | (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { |
| 2630 | ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n" )); |
| 2631 | return key_senderror(so, m, EINVAL); |
| 2632 | } |
| 2633 | |
| 2634 | if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && |
| 2635 | (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { |
| 2636 | ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n" )); |
| 2637 | return key_senderror(so, m, EINVAL); |
| 2638 | } |
| 2639 | |
| 2640 | if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && |
| 2641 | (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { |
| 2642 | ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n" )); |
| 2643 | return key_senderror(so, m, EINVAL); |
| 2644 | } |
| 2645 | |
| 2646 | type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; |
| 2647 | sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; |
| 2648 | dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; |
| 2649 | iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; |
| 2650 | raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; |
| 2651 | frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; |
| 2652 | |
| 2653 | /* |
| 2654 | * XXX handle that, it should also contain a SA, or anything |
| 2655 | * that enable to update the SA information. |
| 2656 | */ |
| 2657 | |
| 2658 | return 0; |
| 2659 | } |
| 2660 | |
| 2661 | static struct mbuf * |
| 2662 | key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) |
| 2663 | { |
| 2664 | struct mbuf *result = NULL, *m; |
| 2665 | |
| 2666 | m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); |
| 2667 | if (!m) |
| 2668 | goto fail; |
| 2669 | result = m; |
| 2670 | |
| 2671 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 2672 | &sp->spidx.src.sa, sp->spidx.prefs, |
| 2673 | sp->spidx.ul_proto); |
| 2674 | if (!m) |
| 2675 | goto fail; |
| 2676 | m_cat(result, m); |
| 2677 | |
| 2678 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 2679 | &sp->spidx.dst.sa, sp->spidx.prefd, |
| 2680 | sp->spidx.ul_proto); |
| 2681 | if (!m) |
| 2682 | goto fail; |
| 2683 | m_cat(result, m); |
| 2684 | |
| 2685 | m = key_sp2msg(sp); |
| 2686 | if (!m) |
| 2687 | goto fail; |
| 2688 | m_cat(result, m); |
| 2689 | |
| 2690 | if ((result->m_flags & M_PKTHDR) == 0) |
| 2691 | goto fail; |
| 2692 | |
| 2693 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 2694 | result = m_pullup(result, sizeof(struct sadb_msg)); |
| 2695 | if (result == NULL) |
| 2696 | goto fail; |
| 2697 | } |
| 2698 | |
| 2699 | result->m_pkthdr.len = 0; |
| 2700 | for (m = result; m; m = m->m_next) |
| 2701 | result->m_pkthdr.len += m->m_len; |
| 2702 | |
| 2703 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 2704 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 2705 | |
| 2706 | return result; |
| 2707 | |
| 2708 | fail: |
| 2709 | m_freem(result); |
| 2710 | return NULL; |
| 2711 | } |
| 2712 | |
| 2713 | /* |
| 2714 | * get PFKEY message length for security policy and request. |
| 2715 | */ |
| 2716 | static u_int |
| 2717 | key_getspreqmsglen(const struct secpolicy *sp) |
| 2718 | { |
| 2719 | u_int tlen; |
| 2720 | |
| 2721 | tlen = sizeof(struct sadb_x_policy); |
| 2722 | |
| 2723 | /* if is the policy for ipsec ? */ |
| 2724 | if (sp->policy != IPSEC_POLICY_IPSEC) |
| 2725 | return tlen; |
| 2726 | |
| 2727 | /* get length of ipsec requests */ |
| 2728 | { |
| 2729 | const struct ipsecrequest *isr; |
| 2730 | int len; |
| 2731 | |
| 2732 | for (isr = sp->req; isr != NULL; isr = isr->next) { |
| 2733 | len = sizeof(struct sadb_x_ipsecrequest) |
| 2734 | + isr->saidx.src.sa.sa_len |
| 2735 | + isr->saidx.dst.sa.sa_len; |
| 2736 | |
| 2737 | tlen += PFKEY_ALIGN8(len); |
| 2738 | } |
| 2739 | } |
| 2740 | |
| 2741 | return tlen; |
| 2742 | } |
| 2743 | |
| 2744 | /* |
| 2745 | * SADB_SPDEXPIRE processing |
| 2746 | * send |
| 2747 | * <base, address(SD), lifetime(CH), policy> |
| 2748 | * to KMD by PF_KEY. |
| 2749 | * |
| 2750 | * OUT: 0 : succeed |
| 2751 | * others : error number |
| 2752 | */ |
| 2753 | static int |
| 2754 | key_spdexpire(struct secpolicy *sp) |
| 2755 | { |
| 2756 | int s; |
| 2757 | struct mbuf *result = NULL, *m; |
| 2758 | int len; |
| 2759 | int error = -1; |
| 2760 | struct sadb_lifetime *lt; |
| 2761 | |
| 2762 | /* XXX: Why do we lock ? */ |
| 2763 | s = splsoftnet(); /*called from softclock()*/ |
| 2764 | |
| 2765 | /* sanity check */ |
| 2766 | if (sp == NULL) |
| 2767 | panic("key_spdexpire: NULL pointer is passed" ); |
| 2768 | |
| 2769 | /* set msg header */ |
| 2770 | m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); |
| 2771 | if (!m) { |
| 2772 | error = ENOBUFS; |
| 2773 | goto fail; |
| 2774 | } |
| 2775 | result = m; |
| 2776 | |
| 2777 | /* create lifetime extension (current and hard) */ |
| 2778 | len = PFKEY_ALIGN8(sizeof(*lt)) * 2; |
| 2779 | m = key_alloc_mbuf(len); |
| 2780 | if (!m || m->m_next) { /*XXX*/ |
| 2781 | if (m) |
| 2782 | m_freem(m); |
| 2783 | error = ENOBUFS; |
| 2784 | goto fail; |
| 2785 | } |
| 2786 | memset(mtod(m, void *), 0, len); |
| 2787 | lt = mtod(m, struct sadb_lifetime *); |
| 2788 | lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); |
| 2789 | lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; |
| 2790 | lt->sadb_lifetime_allocations = 0; |
| 2791 | lt->sadb_lifetime_bytes = 0; |
| 2792 | lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; |
| 2793 | lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; |
| 2794 | lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); |
| 2795 | lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); |
| 2796 | lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; |
| 2797 | lt->sadb_lifetime_allocations = 0; |
| 2798 | lt->sadb_lifetime_bytes = 0; |
| 2799 | lt->sadb_lifetime_addtime = sp->lifetime; |
| 2800 | lt->sadb_lifetime_usetime = sp->validtime; |
| 2801 | m_cat(result, m); |
| 2802 | |
| 2803 | /* set sadb_address for source */ |
| 2804 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 2805 | &sp->spidx.src.sa, |
| 2806 | sp->spidx.prefs, sp->spidx.ul_proto); |
| 2807 | if (!m) { |
| 2808 | error = ENOBUFS; |
| 2809 | goto fail; |
| 2810 | } |
| 2811 | m_cat(result, m); |
| 2812 | |
| 2813 | /* set sadb_address for destination */ |
| 2814 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 2815 | &sp->spidx.dst.sa, |
| 2816 | sp->spidx.prefd, sp->spidx.ul_proto); |
| 2817 | if (!m) { |
| 2818 | error = ENOBUFS; |
| 2819 | goto fail; |
| 2820 | } |
| 2821 | m_cat(result, m); |
| 2822 | |
| 2823 | /* set secpolicy */ |
| 2824 | m = key_sp2msg(sp); |
| 2825 | if (!m) { |
| 2826 | error = ENOBUFS; |
| 2827 | goto fail; |
| 2828 | } |
| 2829 | m_cat(result, m); |
| 2830 | |
| 2831 | if ((result->m_flags & M_PKTHDR) == 0) { |
| 2832 | error = EINVAL; |
| 2833 | goto fail; |
| 2834 | } |
| 2835 | |
| 2836 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 2837 | result = m_pullup(result, sizeof(struct sadb_msg)); |
| 2838 | if (result == NULL) { |
| 2839 | error = ENOBUFS; |
| 2840 | goto fail; |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | result->m_pkthdr.len = 0; |
| 2845 | for (m = result; m; m = m->m_next) |
| 2846 | result->m_pkthdr.len += m->m_len; |
| 2847 | |
| 2848 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 2849 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 2850 | |
| 2851 | return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); |
| 2852 | |
| 2853 | fail: |
| 2854 | if (result) |
| 2855 | m_freem(result); |
| 2856 | splx(s); |
| 2857 | return error; |
| 2858 | } |
| 2859 | |
| 2860 | /* %%% SAD management */ |
| 2861 | /* |
| 2862 | * allocating a memory for new SA head, and copy from the values of mhp. |
| 2863 | * OUT: NULL : failure due to the lack of memory. |
| 2864 | * others : pointer to new SA head. |
| 2865 | */ |
| 2866 | static struct secashead * |
| 2867 | key_newsah(const struct secasindex *saidx) |
| 2868 | { |
| 2869 | struct secashead *newsah; |
| 2870 | |
| 2871 | IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx" )); |
| 2872 | |
| 2873 | newsah = (struct secashead *) |
| 2874 | malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); |
| 2875 | if (newsah != NULL) { |
| 2876 | int i; |
| 2877 | for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) |
| 2878 | LIST_INIT(&newsah->savtree[i]); |
| 2879 | newsah->saidx = *saidx; |
| 2880 | |
| 2881 | /* add to saidxtree */ |
| 2882 | newsah->state = SADB_SASTATE_MATURE; |
| 2883 | LIST_INSERT_HEAD(&sahtree, newsah, chain); |
| 2884 | } |
| 2885 | return(newsah); |
| 2886 | } |
| 2887 | |
| 2888 | /* |
| 2889 | * delete SA index and all SA registerd. |
| 2890 | */ |
| 2891 | static void |
| 2892 | key_delsah(struct secashead *sah) |
| 2893 | { |
| 2894 | struct secasvar *sav, *nextsav; |
| 2895 | u_int stateidx, state; |
| 2896 | int s; |
| 2897 | int zombie = 0; |
| 2898 | |
| 2899 | /* sanity check */ |
| 2900 | if (sah == NULL) |
| 2901 | panic("key_delsah: NULL pointer is passed" ); |
| 2902 | |
| 2903 | s = splsoftnet(); /*called from softclock()*/ |
| 2904 | |
| 2905 | /* searching all SA registerd in the secindex. */ |
| 2906 | for (stateidx = 0; |
| 2907 | stateidx < _ARRAYLEN(saorder_state_any); |
| 2908 | stateidx++) { |
| 2909 | |
| 2910 | state = saorder_state_any[stateidx]; |
| 2911 | for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); |
| 2912 | sav != NULL; |
| 2913 | sav = nextsav) { |
| 2914 | |
| 2915 | nextsav = LIST_NEXT(sav, chain); |
| 2916 | |
| 2917 | if (sav->refcnt == 0) { |
| 2918 | /* sanity check */ |
| 2919 | KEY_CHKSASTATE(state, sav->state, "key_delsah" ); |
| 2920 | KEY_FREESAV(&sav); |
| 2921 | } else { |
| 2922 | /* give up to delete this sa */ |
| 2923 | zombie++; |
| 2924 | } |
| 2925 | } |
| 2926 | } |
| 2927 | |
| 2928 | /* don't delete sah only if there are savs. */ |
| 2929 | if (zombie) { |
| 2930 | splx(s); |
| 2931 | return; |
| 2932 | } |
| 2933 | |
| 2934 | rtcache_free(&sah->sa_route); |
| 2935 | |
| 2936 | /* remove from tree of SA index */ |
| 2937 | if (__LIST_CHAINED(sah)) |
| 2938 | LIST_REMOVE(sah, chain); |
| 2939 | |
| 2940 | KFREE(sah); |
| 2941 | |
| 2942 | splx(s); |
| 2943 | return; |
| 2944 | } |
| 2945 | |
| 2946 | /* |
| 2947 | * allocating a new SA with LARVAL state. key_add() and key_getspi() call, |
| 2948 | * and copy the values of mhp into new buffer. |
| 2949 | * When SAD message type is GETSPI: |
| 2950 | * to set sequence number from acq_seq++, |
| 2951 | * to set zero to SPI. |
| 2952 | * not to call key_setsava(). |
| 2953 | * OUT: NULL : fail |
| 2954 | * others : pointer to new secasvar. |
| 2955 | * |
| 2956 | * does not modify mbuf. does not free mbuf on error. |
| 2957 | */ |
| 2958 | static struct secasvar * |
| 2959 | key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, |
| 2960 | struct secashead *sah, int *errp, |
| 2961 | const char* where, int tag) |
| 2962 | { |
| 2963 | struct secasvar *newsav; |
| 2964 | const struct sadb_sa *xsa; |
| 2965 | |
| 2966 | /* sanity check */ |
| 2967 | if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) |
| 2968 | panic("key_newsa: NULL pointer is passed" ); |
| 2969 | |
| 2970 | KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); |
| 2971 | if (newsav == NULL) { |
| 2972 | ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n" )); |
| 2973 | *errp = ENOBUFS; |
| 2974 | goto done; |
| 2975 | } |
| 2976 | memset(newsav, 0, sizeof(struct secasvar)); |
| 2977 | |
| 2978 | switch (mhp->msg->sadb_msg_type) { |
| 2979 | case SADB_GETSPI: |
| 2980 | newsav->spi = 0; |
| 2981 | |
| 2982 | #ifdef IPSEC_DOSEQCHECK |
| 2983 | /* sync sequence number */ |
| 2984 | if (mhp->msg->sadb_msg_seq == 0) |
| 2985 | newsav->seq = |
| 2986 | (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); |
| 2987 | else |
| 2988 | #endif |
| 2989 | newsav->seq = mhp->msg->sadb_msg_seq; |
| 2990 | break; |
| 2991 | |
| 2992 | case SADB_ADD: |
| 2993 | /* sanity check */ |
| 2994 | if (mhp->ext[SADB_EXT_SA] == NULL) { |
| 2995 | KFREE(newsav), newsav = NULL; |
| 2996 | ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n" )); |
| 2997 | *errp = EINVAL; |
| 2998 | goto done; |
| 2999 | } |
| 3000 | xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 3001 | newsav->spi = xsa->sadb_sa_spi; |
| 3002 | newsav->seq = mhp->msg->sadb_msg_seq; |
| 3003 | break; |
| 3004 | default: |
| 3005 | KFREE(newsav), newsav = NULL; |
| 3006 | *errp = EINVAL; |
| 3007 | goto done; |
| 3008 | } |
| 3009 | |
| 3010 | /* copy sav values */ |
| 3011 | if (mhp->msg->sadb_msg_type != SADB_GETSPI) { |
| 3012 | *errp = key_setsaval(newsav, m, mhp); |
| 3013 | if (*errp) { |
| 3014 | KFREE(newsav), newsav = NULL; |
| 3015 | goto done; |
| 3016 | } |
| 3017 | } |
| 3018 | |
| 3019 | /* reset created */ |
| 3020 | newsav->created = time_uptime; |
| 3021 | newsav->pid = mhp->msg->sadb_msg_pid; |
| 3022 | |
| 3023 | /* add to satree */ |
| 3024 | newsav->sah = sah; |
| 3025 | newsav->refcnt = 1; |
| 3026 | newsav->state = SADB_SASTATE_LARVAL; |
| 3027 | LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, |
| 3028 | secasvar, chain); |
| 3029 | done: |
| 3030 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 3031 | printf("DP %s from %s:%u return SP:%p\n" , __func__, |
| 3032 | where, tag, newsav)); |
| 3033 | |
| 3034 | return newsav; |
| 3035 | } |
| 3036 | |
| 3037 | /* |
| 3038 | * free() SA variable entry. |
| 3039 | */ |
| 3040 | static void |
| 3041 | key_delsav(struct secasvar *sav) |
| 3042 | { |
| 3043 | IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav" )); |
| 3044 | IPSEC_ASSERT(sav->refcnt == 0, |
| 3045 | ("key_delsav: reference count %u > 0" , sav->refcnt)); |
| 3046 | |
| 3047 | /* remove from SA header */ |
| 3048 | if (__LIST_CHAINED(sav)) |
| 3049 | LIST_REMOVE(sav, chain); |
| 3050 | |
| 3051 | /* |
| 3052 | * Cleanup xform state. Note that zeroize'ing causes the |
| 3053 | * keys to be cleared; otherwise we must do it ourself. |
| 3054 | */ |
| 3055 | if (sav->tdb_xform != NULL) { |
| 3056 | sav->tdb_xform->xf_zeroize(sav); |
| 3057 | sav->tdb_xform = NULL; |
| 3058 | } else { |
| 3059 | if (sav->key_auth != NULL) |
| 3060 | explicit_memset(_KEYBUF(sav->key_auth), 0, |
| 3061 | _KEYLEN(sav->key_auth)); |
| 3062 | if (sav->key_enc != NULL) |
| 3063 | explicit_memset(_KEYBUF(sav->key_enc), 0, |
| 3064 | _KEYLEN(sav->key_enc)); |
| 3065 | } |
| 3066 | if (sav->key_auth != NULL) { |
| 3067 | KFREE(sav->key_auth); |
| 3068 | sav->key_auth = NULL; |
| 3069 | } |
| 3070 | if (sav->key_enc != NULL) { |
| 3071 | KFREE(sav->key_enc); |
| 3072 | sav->key_enc = NULL; |
| 3073 | } |
| 3074 | if (sav->replay != NULL) { |
| 3075 | KFREE(sav->replay); |
| 3076 | sav->replay = NULL; |
| 3077 | } |
| 3078 | if (sav->lft_c != NULL) { |
| 3079 | KFREE(sav->lft_c); |
| 3080 | sav->lft_c = NULL; |
| 3081 | } |
| 3082 | if (sav->lft_h != NULL) { |
| 3083 | KFREE(sav->lft_h); |
| 3084 | sav->lft_h = NULL; |
| 3085 | } |
| 3086 | if (sav->lft_s != NULL) { |
| 3087 | KFREE(sav->lft_s); |
| 3088 | sav->lft_s = NULL; |
| 3089 | } |
| 3090 | |
| 3091 | KFREE(sav); |
| 3092 | |
| 3093 | return; |
| 3094 | } |
| 3095 | |
| 3096 | /* |
| 3097 | * search SAD. |
| 3098 | * OUT: |
| 3099 | * NULL : not found |
| 3100 | * others : found, pointer to a SA. |
| 3101 | */ |
| 3102 | static struct secashead * |
| 3103 | key_getsah(const struct secasindex *saidx) |
| 3104 | { |
| 3105 | struct secashead *sah; |
| 3106 | |
| 3107 | LIST_FOREACH(sah, &sahtree, chain) { |
| 3108 | if (sah->state == SADB_SASTATE_DEAD) |
| 3109 | continue; |
| 3110 | if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) |
| 3111 | return sah; |
| 3112 | } |
| 3113 | |
| 3114 | return NULL; |
| 3115 | } |
| 3116 | |
| 3117 | /* |
| 3118 | * check not to be duplicated SPI. |
| 3119 | * NOTE: this function is too slow due to searching all SAD. |
| 3120 | * OUT: |
| 3121 | * NULL : not found |
| 3122 | * others : found, pointer to a SA. |
| 3123 | */ |
| 3124 | static struct secasvar * |
| 3125 | key_checkspidup(const struct secasindex *saidx, u_int32_t spi) |
| 3126 | { |
| 3127 | struct secashead *sah; |
| 3128 | struct secasvar *sav; |
| 3129 | |
| 3130 | /* check address family */ |
| 3131 | if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { |
| 3132 | ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n" )); |
| 3133 | return NULL; |
| 3134 | } |
| 3135 | |
| 3136 | /* check all SAD */ |
| 3137 | LIST_FOREACH(sah, &sahtree, chain) { |
| 3138 | if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) |
| 3139 | continue; |
| 3140 | sav = key_getsavbyspi(sah, spi); |
| 3141 | if (sav != NULL) |
| 3142 | return sav; |
| 3143 | } |
| 3144 | |
| 3145 | return NULL; |
| 3146 | } |
| 3147 | |
| 3148 | /* |
| 3149 | * search SAD litmited alive SA, protocol, SPI. |
| 3150 | * OUT: |
| 3151 | * NULL : not found |
| 3152 | * others : found, pointer to a SA. |
| 3153 | */ |
| 3154 | static struct secasvar * |
| 3155 | key_getsavbyspi(struct secashead *sah, u_int32_t spi) |
| 3156 | { |
| 3157 | struct secasvar *sav; |
| 3158 | u_int stateidx, state; |
| 3159 | |
| 3160 | /* search all status */ |
| 3161 | for (stateidx = 0; |
| 3162 | stateidx < _ARRAYLEN(saorder_state_alive); |
| 3163 | stateidx++) { |
| 3164 | |
| 3165 | state = saorder_state_alive[stateidx]; |
| 3166 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 3167 | |
| 3168 | /* sanity check */ |
| 3169 | if (sav->state != state) { |
| 3170 | ipseclog((LOG_DEBUG, "key_getsavbyspi: " |
| 3171 | "invalid sav->state (queue: %d SA: %d)\n" , |
| 3172 | state, sav->state)); |
| 3173 | continue; |
| 3174 | } |
| 3175 | |
| 3176 | if (sav->spi == spi) |
| 3177 | return sav; |
| 3178 | } |
| 3179 | } |
| 3180 | |
| 3181 | return NULL; |
| 3182 | } |
| 3183 | |
| 3184 | /* |
| 3185 | * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. |
| 3186 | * You must update these if need. |
| 3187 | * OUT: 0: success. |
| 3188 | * !0: failure. |
| 3189 | * |
| 3190 | * does not modify mbuf. does not free mbuf on error. |
| 3191 | */ |
| 3192 | static int |
| 3193 | key_setsaval(struct secasvar *sav, struct mbuf *m, |
| 3194 | const struct sadb_msghdr *mhp) |
| 3195 | { |
| 3196 | int error = 0; |
| 3197 | |
| 3198 | /* sanity check */ |
| 3199 | if (m == NULL || mhp == NULL || mhp->msg == NULL) |
| 3200 | panic("key_setsaval: NULL pointer is passed" ); |
| 3201 | |
| 3202 | /* initialization */ |
| 3203 | sav->replay = NULL; |
| 3204 | sav->key_auth = NULL; |
| 3205 | sav->key_enc = NULL; |
| 3206 | sav->lft_c = NULL; |
| 3207 | sav->lft_h = NULL; |
| 3208 | sav->lft_s = NULL; |
| 3209 | sav->tdb_xform = NULL; /* transform */ |
| 3210 | sav->tdb_encalgxform = NULL; /* encoding algorithm */ |
| 3211 | sav->tdb_authalgxform = NULL; /* authentication algorithm */ |
| 3212 | sav->tdb_compalgxform = NULL; /* compression algorithm */ |
| 3213 | sav->natt_type = 0; |
| 3214 | sav->esp_frag = 0; |
| 3215 | |
| 3216 | /* SA */ |
| 3217 | if (mhp->ext[SADB_EXT_SA] != NULL) { |
| 3218 | const struct sadb_sa *sa0; |
| 3219 | |
| 3220 | sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 3221 | if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { |
| 3222 | error = EINVAL; |
| 3223 | goto fail; |
| 3224 | } |
| 3225 | |
| 3226 | sav->alg_auth = sa0->sadb_sa_auth; |
| 3227 | sav->alg_enc = sa0->sadb_sa_encrypt; |
| 3228 | sav->flags = sa0->sadb_sa_flags; |
| 3229 | |
| 3230 | /* replay window */ |
| 3231 | if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { |
| 3232 | sav->replay = (struct secreplay *) |
| 3233 | malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); |
| 3234 | if (sav->replay == NULL) { |
| 3235 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3236 | error = ENOBUFS; |
| 3237 | goto fail; |
| 3238 | } |
| 3239 | if (sa0->sadb_sa_replay != 0) |
| 3240 | sav->replay->bitmap = (char*)(sav->replay+1); |
| 3241 | sav->replay->wsize = sa0->sadb_sa_replay; |
| 3242 | } |
| 3243 | } |
| 3244 | |
| 3245 | /* Authentication keys */ |
| 3246 | if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { |
| 3247 | const struct sadb_key *key0; |
| 3248 | int len; |
| 3249 | |
| 3250 | key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; |
| 3251 | len = mhp->extlen[SADB_EXT_KEY_AUTH]; |
| 3252 | |
| 3253 | error = 0; |
| 3254 | if (len < sizeof(*key0)) { |
| 3255 | error = EINVAL; |
| 3256 | goto fail; |
| 3257 | } |
| 3258 | switch (mhp->msg->sadb_msg_satype) { |
| 3259 | case SADB_SATYPE_AH: |
| 3260 | case SADB_SATYPE_ESP: |
| 3261 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 3262 | if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && |
| 3263 | sav->alg_auth != SADB_X_AALG_NULL) |
| 3264 | error = EINVAL; |
| 3265 | break; |
| 3266 | case SADB_X_SATYPE_IPCOMP: |
| 3267 | default: |
| 3268 | error = EINVAL; |
| 3269 | break; |
| 3270 | } |
| 3271 | if (error) { |
| 3272 | ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n" )); |
| 3273 | goto fail; |
| 3274 | } |
| 3275 | |
| 3276 | sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); |
| 3277 | if (sav->key_auth == NULL) { |
| 3278 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3279 | error = ENOBUFS; |
| 3280 | goto fail; |
| 3281 | } |
| 3282 | } |
| 3283 | |
| 3284 | /* Encryption key */ |
| 3285 | if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { |
| 3286 | const struct sadb_key *key0; |
| 3287 | int len; |
| 3288 | |
| 3289 | key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; |
| 3290 | len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; |
| 3291 | |
| 3292 | error = 0; |
| 3293 | if (len < sizeof(*key0)) { |
| 3294 | error = EINVAL; |
| 3295 | goto fail; |
| 3296 | } |
| 3297 | switch (mhp->msg->sadb_msg_satype) { |
| 3298 | case SADB_SATYPE_ESP: |
| 3299 | if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && |
| 3300 | sav->alg_enc != SADB_EALG_NULL) { |
| 3301 | error = EINVAL; |
| 3302 | break; |
| 3303 | } |
| 3304 | sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); |
| 3305 | if (sav->key_enc == NULL) { |
| 3306 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3307 | error = ENOBUFS; |
| 3308 | goto fail; |
| 3309 | } |
| 3310 | break; |
| 3311 | case SADB_X_SATYPE_IPCOMP: |
| 3312 | if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) |
| 3313 | error = EINVAL; |
| 3314 | sav->key_enc = NULL; /*just in case*/ |
| 3315 | break; |
| 3316 | case SADB_SATYPE_AH: |
| 3317 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 3318 | default: |
| 3319 | error = EINVAL; |
| 3320 | break; |
| 3321 | } |
| 3322 | if (error) { |
| 3323 | ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n" )); |
| 3324 | goto fail; |
| 3325 | } |
| 3326 | } |
| 3327 | |
| 3328 | /* set iv */ |
| 3329 | sav->ivlen = 0; |
| 3330 | |
| 3331 | switch (mhp->msg->sadb_msg_satype) { |
| 3332 | case SADB_SATYPE_AH: |
| 3333 | error = xform_init(sav, XF_AH); |
| 3334 | break; |
| 3335 | case SADB_SATYPE_ESP: |
| 3336 | error = xform_init(sav, XF_ESP); |
| 3337 | break; |
| 3338 | case SADB_X_SATYPE_IPCOMP: |
| 3339 | error = xform_init(sav, XF_IPCOMP); |
| 3340 | break; |
| 3341 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 3342 | error = xform_init(sav, XF_TCPSIGNATURE); |
| 3343 | break; |
| 3344 | } |
| 3345 | if (error) { |
| 3346 | ipseclog((LOG_DEBUG, |
| 3347 | "key_setsaval: unable to initialize SA type %u.\n" , |
| 3348 | mhp->msg->sadb_msg_satype)); |
| 3349 | goto fail; |
| 3350 | } |
| 3351 | |
| 3352 | /* reset created */ |
| 3353 | sav->created = time_uptime; |
| 3354 | |
| 3355 | /* make lifetime for CURRENT */ |
| 3356 | KMALLOC(sav->lft_c, struct sadb_lifetime *, |
| 3357 | sizeof(struct sadb_lifetime)); |
| 3358 | if (sav->lft_c == NULL) { |
| 3359 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3360 | error = ENOBUFS; |
| 3361 | goto fail; |
| 3362 | } |
| 3363 | |
| 3364 | sav->lft_c->sadb_lifetime_len = |
| 3365 | PFKEY_UNIT64(sizeof(struct sadb_lifetime)); |
| 3366 | sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; |
| 3367 | sav->lft_c->sadb_lifetime_allocations = 0; |
| 3368 | sav->lft_c->sadb_lifetime_bytes = 0; |
| 3369 | sav->lft_c->sadb_lifetime_addtime = time_uptime; |
| 3370 | sav->lft_c->sadb_lifetime_usetime = 0; |
| 3371 | |
| 3372 | /* lifetimes for HARD and SOFT */ |
| 3373 | { |
| 3374 | const struct sadb_lifetime *lft0; |
| 3375 | |
| 3376 | lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; |
| 3377 | if (lft0 != NULL) { |
| 3378 | if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { |
| 3379 | error = EINVAL; |
| 3380 | goto fail; |
| 3381 | } |
| 3382 | sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, |
| 3383 | sizeof(*lft0)); |
| 3384 | if (sav->lft_h == NULL) { |
| 3385 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3386 | error = ENOBUFS; |
| 3387 | goto fail; |
| 3388 | } |
| 3389 | /* to be initialize ? */ |
| 3390 | } |
| 3391 | |
| 3392 | lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; |
| 3393 | if (lft0 != NULL) { |
| 3394 | if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { |
| 3395 | error = EINVAL; |
| 3396 | goto fail; |
| 3397 | } |
| 3398 | sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, |
| 3399 | sizeof(*lft0)); |
| 3400 | if (sav->lft_s == NULL) { |
| 3401 | ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n" )); |
| 3402 | error = ENOBUFS; |
| 3403 | goto fail; |
| 3404 | } |
| 3405 | /* to be initialize ? */ |
| 3406 | } |
| 3407 | } |
| 3408 | |
| 3409 | return 0; |
| 3410 | |
| 3411 | fail: |
| 3412 | /* initialization */ |
| 3413 | if (sav->replay != NULL) { |
| 3414 | KFREE(sav->replay); |
| 3415 | sav->replay = NULL; |
| 3416 | } |
| 3417 | if (sav->key_auth != NULL) { |
| 3418 | KFREE(sav->key_auth); |
| 3419 | sav->key_auth = NULL; |
| 3420 | } |
| 3421 | if (sav->key_enc != NULL) { |
| 3422 | KFREE(sav->key_enc); |
| 3423 | sav->key_enc = NULL; |
| 3424 | } |
| 3425 | if (sav->lft_c != NULL) { |
| 3426 | KFREE(sav->lft_c); |
| 3427 | sav->lft_c = NULL; |
| 3428 | } |
| 3429 | if (sav->lft_h != NULL) { |
| 3430 | KFREE(sav->lft_h); |
| 3431 | sav->lft_h = NULL; |
| 3432 | } |
| 3433 | if (sav->lft_s != NULL) { |
| 3434 | KFREE(sav->lft_s); |
| 3435 | sav->lft_s = NULL; |
| 3436 | } |
| 3437 | |
| 3438 | return error; |
| 3439 | } |
| 3440 | |
| 3441 | /* |
| 3442 | * validation with a secasvar entry, and set SADB_SATYPE_MATURE. |
| 3443 | * OUT: 0: valid |
| 3444 | * other: errno |
| 3445 | */ |
| 3446 | static int |
| 3447 | key_mature(struct secasvar *sav) |
| 3448 | { |
| 3449 | int error; |
| 3450 | |
| 3451 | /* check SPI value */ |
| 3452 | switch (sav->sah->saidx.proto) { |
| 3453 | case IPPROTO_ESP: |
| 3454 | case IPPROTO_AH: |
| 3455 | if (ntohl(sav->spi) <= 255) { |
| 3456 | ipseclog((LOG_DEBUG, |
| 3457 | "key_mature: illegal range of SPI %u.\n" , |
| 3458 | (u_int32_t)ntohl(sav->spi))); |
| 3459 | return EINVAL; |
| 3460 | } |
| 3461 | break; |
| 3462 | } |
| 3463 | |
| 3464 | /* check satype */ |
| 3465 | switch (sav->sah->saidx.proto) { |
| 3466 | case IPPROTO_ESP: |
| 3467 | /* check flags */ |
| 3468 | if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == |
| 3469 | (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { |
| 3470 | ipseclog((LOG_DEBUG, "key_mature: " |
| 3471 | "invalid flag (derived) given to old-esp.\n" )); |
| 3472 | return EINVAL; |
| 3473 | } |
| 3474 | error = xform_init(sav, XF_ESP); |
| 3475 | break; |
| 3476 | case IPPROTO_AH: |
| 3477 | /* check flags */ |
| 3478 | if (sav->flags & SADB_X_EXT_DERIV) { |
| 3479 | ipseclog((LOG_DEBUG, "key_mature: " |
| 3480 | "invalid flag (derived) given to AH SA.\n" )); |
| 3481 | return EINVAL; |
| 3482 | } |
| 3483 | if (sav->alg_enc != SADB_EALG_NONE) { |
| 3484 | ipseclog((LOG_DEBUG, "key_mature: " |
| 3485 | "protocol and algorithm mismated.\n" )); |
| 3486 | return(EINVAL); |
| 3487 | } |
| 3488 | error = xform_init(sav, XF_AH); |
| 3489 | break; |
| 3490 | case IPPROTO_IPCOMP: |
| 3491 | if (sav->alg_auth != SADB_AALG_NONE) { |
| 3492 | ipseclog((LOG_DEBUG, "key_mature: " |
| 3493 | "protocol and algorithm mismated.\n" )); |
| 3494 | return(EINVAL); |
| 3495 | } |
| 3496 | if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 |
| 3497 | && ntohl(sav->spi) >= 0x10000) { |
| 3498 | ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n" )); |
| 3499 | return(EINVAL); |
| 3500 | } |
| 3501 | error = xform_init(sav, XF_IPCOMP); |
| 3502 | break; |
| 3503 | case IPPROTO_TCP: |
| 3504 | if (sav->alg_enc != SADB_EALG_NONE) { |
| 3505 | ipseclog((LOG_DEBUG, "%s: protocol and algorithm " |
| 3506 | "mismated.\n" , __func__)); |
| 3507 | return(EINVAL); |
| 3508 | } |
| 3509 | error = xform_init(sav, XF_TCPSIGNATURE); |
| 3510 | break; |
| 3511 | default: |
| 3512 | ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n" )); |
| 3513 | error = EPROTONOSUPPORT; |
| 3514 | break; |
| 3515 | } |
| 3516 | if (error == 0) |
| 3517 | key_sa_chgstate(sav, SADB_SASTATE_MATURE); |
| 3518 | return (error); |
| 3519 | } |
| 3520 | |
| 3521 | /* |
| 3522 | * subroutine for SADB_GET and SADB_DUMP. |
| 3523 | */ |
| 3524 | static struct mbuf * |
| 3525 | key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, |
| 3526 | u_int32_t seq, u_int32_t pid) |
| 3527 | { |
| 3528 | struct mbuf *result = NULL, *tres = NULL, *m; |
| 3529 | int l = 0; |
| 3530 | int i; |
| 3531 | void *p; |
| 3532 | struct sadb_lifetime lt; |
| 3533 | int dumporder[] = { |
| 3534 | SADB_EXT_SA, SADB_X_EXT_SA2, |
| 3535 | SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, |
| 3536 | SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, |
| 3537 | SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, |
| 3538 | SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, |
| 3539 | SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, |
| 3540 | SADB_X_EXT_NAT_T_TYPE, |
| 3541 | SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, |
| 3542 | SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, |
| 3543 | SADB_X_EXT_NAT_T_FRAG, |
| 3544 | |
| 3545 | }; |
| 3546 | |
| 3547 | m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); |
| 3548 | if (m == NULL) |
| 3549 | goto fail; |
| 3550 | result = m; |
| 3551 | |
| 3552 | for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { |
| 3553 | m = NULL; |
| 3554 | p = NULL; |
| 3555 | switch (dumporder[i]) { |
| 3556 | case SADB_EXT_SA: |
| 3557 | m = key_setsadbsa(sav); |
| 3558 | break; |
| 3559 | |
| 3560 | case SADB_X_EXT_SA2: |
| 3561 | m = key_setsadbxsa2(sav->sah->saidx.mode, |
| 3562 | sav->replay ? sav->replay->count : 0, |
| 3563 | sav->sah->saidx.reqid); |
| 3564 | break; |
| 3565 | |
| 3566 | case SADB_EXT_ADDRESS_SRC: |
| 3567 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 3568 | &sav->sah->saidx.src.sa, |
| 3569 | FULLMASK, IPSEC_ULPROTO_ANY); |
| 3570 | break; |
| 3571 | |
| 3572 | case SADB_EXT_ADDRESS_DST: |
| 3573 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 3574 | &sav->sah->saidx.dst.sa, |
| 3575 | FULLMASK, IPSEC_ULPROTO_ANY); |
| 3576 | break; |
| 3577 | |
| 3578 | case SADB_EXT_KEY_AUTH: |
| 3579 | if (!sav->key_auth) |
| 3580 | continue; |
| 3581 | l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); |
| 3582 | p = sav->key_auth; |
| 3583 | break; |
| 3584 | |
| 3585 | case SADB_EXT_KEY_ENCRYPT: |
| 3586 | if (!sav->key_enc) |
| 3587 | continue; |
| 3588 | l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); |
| 3589 | p = sav->key_enc; |
| 3590 | break; |
| 3591 | |
| 3592 | case SADB_EXT_LIFETIME_CURRENT: |
| 3593 | if (!sav->lft_c) |
| 3594 | continue; |
| 3595 | l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); |
| 3596 | memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); |
| 3597 | lt.sadb_lifetime_addtime += time_second - time_uptime; |
| 3598 | lt.sadb_lifetime_usetime += time_second - time_uptime; |
| 3599 | p = < |
| 3600 | break; |
| 3601 | |
| 3602 | case SADB_EXT_LIFETIME_HARD: |
| 3603 | if (!sav->lft_h) |
| 3604 | continue; |
| 3605 | l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); |
| 3606 | p = sav->lft_h; |
| 3607 | break; |
| 3608 | |
| 3609 | case SADB_EXT_LIFETIME_SOFT: |
| 3610 | if (!sav->lft_s) |
| 3611 | continue; |
| 3612 | l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); |
| 3613 | p = sav->lft_s; |
| 3614 | break; |
| 3615 | |
| 3616 | case SADB_X_EXT_NAT_T_TYPE: |
| 3617 | m = key_setsadbxtype(sav->natt_type); |
| 3618 | break; |
| 3619 | |
| 3620 | case SADB_X_EXT_NAT_T_DPORT: |
| 3621 | if (sav->natt_type == 0) |
| 3622 | continue; |
| 3623 | m = key_setsadbxport( |
| 3624 | key_portfromsaddr(&sav->sah->saidx.dst), |
| 3625 | SADB_X_EXT_NAT_T_DPORT); |
| 3626 | break; |
| 3627 | |
| 3628 | case SADB_X_EXT_NAT_T_SPORT: |
| 3629 | if (sav->natt_type == 0) |
| 3630 | continue; |
| 3631 | m = key_setsadbxport( |
| 3632 | key_portfromsaddr(&sav->sah->saidx.src), |
| 3633 | SADB_X_EXT_NAT_T_SPORT); |
| 3634 | break; |
| 3635 | |
| 3636 | case SADB_X_EXT_NAT_T_FRAG: |
| 3637 | /* don't send frag info if not set */ |
| 3638 | if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) |
| 3639 | continue; |
| 3640 | m = key_setsadbxfrag(sav->esp_frag); |
| 3641 | break; |
| 3642 | |
| 3643 | case SADB_X_EXT_NAT_T_OAI: |
| 3644 | case SADB_X_EXT_NAT_T_OAR: |
| 3645 | continue; |
| 3646 | |
| 3647 | case SADB_EXT_ADDRESS_PROXY: |
| 3648 | case SADB_EXT_IDENTITY_SRC: |
| 3649 | case SADB_EXT_IDENTITY_DST: |
| 3650 | /* XXX: should we brought from SPD ? */ |
| 3651 | case SADB_EXT_SENSITIVITY: |
| 3652 | default: |
| 3653 | continue; |
| 3654 | } |
| 3655 | |
| 3656 | KASSERT(!(m && p)); |
| 3657 | if (!m && !p) |
| 3658 | goto fail; |
| 3659 | if (p && tres) { |
| 3660 | M_PREPEND(tres, l, M_DONTWAIT); |
| 3661 | if (!tres) |
| 3662 | goto fail; |
| 3663 | memcpy(mtod(tres, void *), p, l); |
| 3664 | continue; |
| 3665 | } |
| 3666 | if (p) { |
| 3667 | m = key_alloc_mbuf(l); |
| 3668 | if (!m) |
| 3669 | goto fail; |
| 3670 | m_copyback(m, 0, l, p); |
| 3671 | } |
| 3672 | |
| 3673 | if (tres) |
| 3674 | m_cat(m, tres); |
| 3675 | tres = m; |
| 3676 | } |
| 3677 | |
| 3678 | m_cat(result, tres); |
| 3679 | tres = NULL; /* avoid free on error below */ |
| 3680 | |
| 3681 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 3682 | result = m_pullup(result, sizeof(struct sadb_msg)); |
| 3683 | if (result == NULL) |
| 3684 | goto fail; |
| 3685 | } |
| 3686 | |
| 3687 | result->m_pkthdr.len = 0; |
| 3688 | for (m = result; m; m = m->m_next) |
| 3689 | result->m_pkthdr.len += m->m_len; |
| 3690 | |
| 3691 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 3692 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 3693 | |
| 3694 | return result; |
| 3695 | |
| 3696 | fail: |
| 3697 | m_freem(result); |
| 3698 | m_freem(tres); |
| 3699 | return NULL; |
| 3700 | } |
| 3701 | |
| 3702 | |
| 3703 | /* |
| 3704 | * set a type in sadb_x_nat_t_type |
| 3705 | */ |
| 3706 | static struct mbuf * |
| 3707 | key_setsadbxtype(u_int16_t type) |
| 3708 | { |
| 3709 | struct mbuf *m; |
| 3710 | size_t len; |
| 3711 | struct sadb_x_nat_t_type *p; |
| 3712 | |
| 3713 | len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); |
| 3714 | |
| 3715 | m = key_alloc_mbuf(len); |
| 3716 | if (!m || m->m_next) { /*XXX*/ |
| 3717 | if (m) |
| 3718 | m_freem(m); |
| 3719 | return NULL; |
| 3720 | } |
| 3721 | |
| 3722 | p = mtod(m, struct sadb_x_nat_t_type *); |
| 3723 | |
| 3724 | memset(p, 0, len); |
| 3725 | p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); |
| 3726 | p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; |
| 3727 | p->sadb_x_nat_t_type_type = type; |
| 3728 | |
| 3729 | return m; |
| 3730 | } |
| 3731 | /* |
| 3732 | * set a port in sadb_x_nat_t_port. port is in network order |
| 3733 | */ |
| 3734 | static struct mbuf * |
| 3735 | key_setsadbxport(u_int16_t port, u_int16_t type) |
| 3736 | { |
| 3737 | struct mbuf *m; |
| 3738 | size_t len; |
| 3739 | struct sadb_x_nat_t_port *p; |
| 3740 | |
| 3741 | len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); |
| 3742 | |
| 3743 | m = key_alloc_mbuf(len); |
| 3744 | if (!m || m->m_next) { /*XXX*/ |
| 3745 | if (m) |
| 3746 | m_freem(m); |
| 3747 | return NULL; |
| 3748 | } |
| 3749 | |
| 3750 | p = mtod(m, struct sadb_x_nat_t_port *); |
| 3751 | |
| 3752 | memset(p, 0, len); |
| 3753 | p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); |
| 3754 | p->sadb_x_nat_t_port_exttype = type; |
| 3755 | p->sadb_x_nat_t_port_port = port; |
| 3756 | |
| 3757 | return m; |
| 3758 | } |
| 3759 | |
| 3760 | /* |
| 3761 | * set fragmentation info in sadb_x_nat_t_frag |
| 3762 | */ |
| 3763 | static struct mbuf * |
| 3764 | key_setsadbxfrag(u_int16_t flen) |
| 3765 | { |
| 3766 | struct mbuf *m; |
| 3767 | size_t len; |
| 3768 | struct sadb_x_nat_t_frag *p; |
| 3769 | |
| 3770 | len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); |
| 3771 | |
| 3772 | m = key_alloc_mbuf(len); |
| 3773 | if (!m || m->m_next) { /*XXX*/ |
| 3774 | if (m) |
| 3775 | m_freem(m); |
| 3776 | return NULL; |
| 3777 | } |
| 3778 | |
| 3779 | p = mtod(m, struct sadb_x_nat_t_frag *); |
| 3780 | |
| 3781 | memset(p, 0, len); |
| 3782 | p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); |
| 3783 | p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; |
| 3784 | p->sadb_x_nat_t_frag_fraglen = flen; |
| 3785 | |
| 3786 | return m; |
| 3787 | } |
| 3788 | |
| 3789 | /* |
| 3790 | * Get port from sockaddr, port is in network order |
| 3791 | */ |
| 3792 | u_int16_t |
| 3793 | key_portfromsaddr(const union sockaddr_union *saddr) |
| 3794 | { |
| 3795 | u_int16_t port; |
| 3796 | |
| 3797 | switch (saddr->sa.sa_family) { |
| 3798 | case AF_INET: { |
| 3799 | port = saddr->sin.sin_port; |
| 3800 | break; |
| 3801 | } |
| 3802 | #ifdef INET6 |
| 3803 | case AF_INET6: { |
| 3804 | port = saddr->sin6.sin6_port; |
| 3805 | break; |
| 3806 | } |
| 3807 | #endif |
| 3808 | default: |
| 3809 | printf("%s: unexpected address family\n" , __func__); |
| 3810 | port = 0; |
| 3811 | break; |
| 3812 | } |
| 3813 | |
| 3814 | return port; |
| 3815 | } |
| 3816 | |
| 3817 | |
| 3818 | /* |
| 3819 | * Set port is struct sockaddr. port is in network order |
| 3820 | */ |
| 3821 | static void |
| 3822 | key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) |
| 3823 | { |
| 3824 | switch (saddr->sa.sa_family) { |
| 3825 | case AF_INET: { |
| 3826 | saddr->sin.sin_port = port; |
| 3827 | break; |
| 3828 | } |
| 3829 | #ifdef INET6 |
| 3830 | case AF_INET6: { |
| 3831 | saddr->sin6.sin6_port = port; |
| 3832 | break; |
| 3833 | } |
| 3834 | #endif |
| 3835 | default: |
| 3836 | printf("%s: unexpected address family %d\n" , __func__, |
| 3837 | saddr->sa.sa_family); |
| 3838 | break; |
| 3839 | } |
| 3840 | |
| 3841 | return; |
| 3842 | } |
| 3843 | |
| 3844 | /* |
| 3845 | * Safety check sa_len |
| 3846 | */ |
| 3847 | static int |
| 3848 | key_checksalen(const union sockaddr_union *saddr) |
| 3849 | { |
| 3850 | switch (saddr->sa.sa_family) { |
| 3851 | case AF_INET: |
| 3852 | if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) |
| 3853 | return -1; |
| 3854 | break; |
| 3855 | #ifdef INET6 |
| 3856 | case AF_INET6: |
| 3857 | if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) |
| 3858 | return -1; |
| 3859 | break; |
| 3860 | #endif |
| 3861 | default: |
| 3862 | printf("%s: unexpected sa_family %d\n" , __func__, |
| 3863 | saddr->sa.sa_family); |
| 3864 | return -1; |
| 3865 | break; |
| 3866 | } |
| 3867 | return 0; |
| 3868 | } |
| 3869 | |
| 3870 | |
| 3871 | /* |
| 3872 | * set data into sadb_msg. |
| 3873 | */ |
| 3874 | static struct mbuf * |
| 3875 | key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, |
| 3876 | u_int32_t seq, pid_t pid, u_int16_t reserved) |
| 3877 | { |
| 3878 | struct mbuf *m; |
| 3879 | struct sadb_msg *p; |
| 3880 | int len; |
| 3881 | |
| 3882 | len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 3883 | if (len > MCLBYTES) |
| 3884 | return NULL; |
| 3885 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 3886 | if (m && len > MHLEN) { |
| 3887 | MCLGET(m, M_DONTWAIT); |
| 3888 | if ((m->m_flags & M_EXT) == 0) { |
| 3889 | m_freem(m); |
| 3890 | m = NULL; |
| 3891 | } |
| 3892 | } |
| 3893 | if (!m) |
| 3894 | return NULL; |
| 3895 | m->m_pkthdr.len = m->m_len = len; |
| 3896 | m->m_next = NULL; |
| 3897 | |
| 3898 | p = mtod(m, struct sadb_msg *); |
| 3899 | |
| 3900 | memset(p, 0, len); |
| 3901 | p->sadb_msg_version = PF_KEY_V2; |
| 3902 | p->sadb_msg_type = type; |
| 3903 | p->sadb_msg_errno = 0; |
| 3904 | p->sadb_msg_satype = satype; |
| 3905 | p->sadb_msg_len = PFKEY_UNIT64(tlen); |
| 3906 | p->sadb_msg_reserved = reserved; |
| 3907 | p->sadb_msg_seq = seq; |
| 3908 | p->sadb_msg_pid = (u_int32_t)pid; |
| 3909 | |
| 3910 | return m; |
| 3911 | } |
| 3912 | |
| 3913 | /* |
| 3914 | * copy secasvar data into sadb_address. |
| 3915 | */ |
| 3916 | static struct mbuf * |
| 3917 | key_setsadbsa(struct secasvar *sav) |
| 3918 | { |
| 3919 | struct mbuf *m; |
| 3920 | struct sadb_sa *p; |
| 3921 | int len; |
| 3922 | |
| 3923 | len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); |
| 3924 | m = key_alloc_mbuf(len); |
| 3925 | if (!m || m->m_next) { /*XXX*/ |
| 3926 | if (m) |
| 3927 | m_freem(m); |
| 3928 | return NULL; |
| 3929 | } |
| 3930 | |
| 3931 | p = mtod(m, struct sadb_sa *); |
| 3932 | |
| 3933 | memset(p, 0, len); |
| 3934 | p->sadb_sa_len = PFKEY_UNIT64(len); |
| 3935 | p->sadb_sa_exttype = SADB_EXT_SA; |
| 3936 | p->sadb_sa_spi = sav->spi; |
| 3937 | p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); |
| 3938 | p->sadb_sa_state = sav->state; |
| 3939 | p->sadb_sa_auth = sav->alg_auth; |
| 3940 | p->sadb_sa_encrypt = sav->alg_enc; |
| 3941 | p->sadb_sa_flags = sav->flags; |
| 3942 | |
| 3943 | return m; |
| 3944 | } |
| 3945 | |
| 3946 | /* |
| 3947 | * set data into sadb_address. |
| 3948 | */ |
| 3949 | static struct mbuf * |
| 3950 | key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, |
| 3951 | u_int8_t prefixlen, u_int16_t ul_proto) |
| 3952 | { |
| 3953 | struct mbuf *m; |
| 3954 | struct sadb_address *p; |
| 3955 | size_t len; |
| 3956 | |
| 3957 | len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + |
| 3958 | PFKEY_ALIGN8(saddr->sa_len); |
| 3959 | m = key_alloc_mbuf(len); |
| 3960 | if (!m || m->m_next) { /*XXX*/ |
| 3961 | if (m) |
| 3962 | m_freem(m); |
| 3963 | return NULL; |
| 3964 | } |
| 3965 | |
| 3966 | p = mtod(m, struct sadb_address *); |
| 3967 | |
| 3968 | memset(p, 0, len); |
| 3969 | p->sadb_address_len = PFKEY_UNIT64(len); |
| 3970 | p->sadb_address_exttype = exttype; |
| 3971 | p->sadb_address_proto = ul_proto; |
| 3972 | if (prefixlen == FULLMASK) { |
| 3973 | switch (saddr->sa_family) { |
| 3974 | case AF_INET: |
| 3975 | prefixlen = sizeof(struct in_addr) << 3; |
| 3976 | break; |
| 3977 | case AF_INET6: |
| 3978 | prefixlen = sizeof(struct in6_addr) << 3; |
| 3979 | break; |
| 3980 | default: |
| 3981 | ; /*XXX*/ |
| 3982 | } |
| 3983 | } |
| 3984 | p->sadb_address_prefixlen = prefixlen; |
| 3985 | p->sadb_address_reserved = 0; |
| 3986 | |
| 3987 | memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), |
| 3988 | saddr, saddr->sa_len); |
| 3989 | |
| 3990 | return m; |
| 3991 | } |
| 3992 | |
| 3993 | #if 0 |
| 3994 | /* |
| 3995 | * set data into sadb_ident. |
| 3996 | */ |
| 3997 | static struct mbuf * |
| 3998 | key_setsadbident(u_int16_t exttype, u_int16_t idtype, |
| 3999 | void *string, int stringlen, u_int64_t id) |
| 4000 | { |
| 4001 | struct mbuf *m; |
| 4002 | struct sadb_ident *p; |
| 4003 | size_t len; |
| 4004 | |
| 4005 | len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); |
| 4006 | m = key_alloc_mbuf(len); |
| 4007 | if (!m || m->m_next) { /*XXX*/ |
| 4008 | if (m) |
| 4009 | m_freem(m); |
| 4010 | return NULL; |
| 4011 | } |
| 4012 | |
| 4013 | p = mtod(m, struct sadb_ident *); |
| 4014 | |
| 4015 | memset(p, 0, len); |
| 4016 | p->sadb_ident_len = PFKEY_UNIT64(len); |
| 4017 | p->sadb_ident_exttype = exttype; |
| 4018 | p->sadb_ident_type = idtype; |
| 4019 | p->sadb_ident_reserved = 0; |
| 4020 | p->sadb_ident_id = id; |
| 4021 | |
| 4022 | memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), |
| 4023 | string, stringlen); |
| 4024 | |
| 4025 | return m; |
| 4026 | } |
| 4027 | #endif |
| 4028 | |
| 4029 | /* |
| 4030 | * set data into sadb_x_sa2. |
| 4031 | */ |
| 4032 | static struct mbuf * |
| 4033 | key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) |
| 4034 | { |
| 4035 | struct mbuf *m; |
| 4036 | struct sadb_x_sa2 *p; |
| 4037 | size_t len; |
| 4038 | |
| 4039 | len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); |
| 4040 | m = key_alloc_mbuf(len); |
| 4041 | if (!m || m->m_next) { /*XXX*/ |
| 4042 | if (m) |
| 4043 | m_freem(m); |
| 4044 | return NULL; |
| 4045 | } |
| 4046 | |
| 4047 | p = mtod(m, struct sadb_x_sa2 *); |
| 4048 | |
| 4049 | memset(p, 0, len); |
| 4050 | p->sadb_x_sa2_len = PFKEY_UNIT64(len); |
| 4051 | p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; |
| 4052 | p->sadb_x_sa2_mode = mode; |
| 4053 | p->sadb_x_sa2_reserved1 = 0; |
| 4054 | p->sadb_x_sa2_reserved2 = 0; |
| 4055 | p->sadb_x_sa2_sequence = seq; |
| 4056 | p->sadb_x_sa2_reqid = reqid; |
| 4057 | |
| 4058 | return m; |
| 4059 | } |
| 4060 | |
| 4061 | /* |
| 4062 | * set data into sadb_x_policy |
| 4063 | */ |
| 4064 | static struct mbuf * |
| 4065 | key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) |
| 4066 | { |
| 4067 | struct mbuf *m; |
| 4068 | struct sadb_x_policy *p; |
| 4069 | size_t len; |
| 4070 | |
| 4071 | len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); |
| 4072 | m = key_alloc_mbuf(len); |
| 4073 | if (!m || m->m_next) { /*XXX*/ |
| 4074 | if (m) |
| 4075 | m_freem(m); |
| 4076 | return NULL; |
| 4077 | } |
| 4078 | |
| 4079 | p = mtod(m, struct sadb_x_policy *); |
| 4080 | |
| 4081 | memset(p, 0, len); |
| 4082 | p->sadb_x_policy_len = PFKEY_UNIT64(len); |
| 4083 | p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
| 4084 | p->sadb_x_policy_type = type; |
| 4085 | p->sadb_x_policy_dir = dir; |
| 4086 | p->sadb_x_policy_id = id; |
| 4087 | |
| 4088 | return m; |
| 4089 | } |
| 4090 | |
| 4091 | /* %%% utilities */ |
| 4092 | /* |
| 4093 | * copy a buffer into the new buffer allocated. |
| 4094 | */ |
| 4095 | static void * |
| 4096 | key_newbuf(const void *src, u_int len) |
| 4097 | { |
| 4098 | void *new; |
| 4099 | |
| 4100 | KMALLOC(new, void *, len); |
| 4101 | if (new == NULL) { |
| 4102 | ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n" )); |
| 4103 | return NULL; |
| 4104 | } |
| 4105 | memcpy(new, src, len); |
| 4106 | |
| 4107 | return new; |
| 4108 | } |
| 4109 | |
| 4110 | /* compare my own address |
| 4111 | * OUT: 1: true, i.e. my address. |
| 4112 | * 0: false |
| 4113 | */ |
| 4114 | int |
| 4115 | key_ismyaddr(const struct sockaddr *sa) |
| 4116 | { |
| 4117 | #ifdef INET |
| 4118 | const struct sockaddr_in *sin; |
| 4119 | const struct in_ifaddr *ia; |
| 4120 | int s; |
| 4121 | #endif |
| 4122 | |
| 4123 | /* sanity check */ |
| 4124 | if (sa == NULL) |
| 4125 | panic("key_ismyaddr: NULL pointer is passed" ); |
| 4126 | |
| 4127 | switch (sa->sa_family) { |
| 4128 | #ifdef INET |
| 4129 | case AF_INET: |
| 4130 | sin = (const struct sockaddr_in *)sa; |
| 4131 | s = pserialize_read_enter(); |
| 4132 | IN_ADDRLIST_READER_FOREACH(ia) { |
| 4133 | if (sin->sin_family == ia->ia_addr.sin_family && |
| 4134 | sin->sin_len == ia->ia_addr.sin_len && |
| 4135 | sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) |
| 4136 | { |
| 4137 | pserialize_read_exit(s); |
| 4138 | return 1; |
| 4139 | } |
| 4140 | } |
| 4141 | pserialize_read_exit(s); |
| 4142 | break; |
| 4143 | #endif |
| 4144 | #ifdef INET6 |
| 4145 | case AF_INET6: |
| 4146 | return key_ismyaddr6((const struct sockaddr_in6 *)sa); |
| 4147 | #endif |
| 4148 | } |
| 4149 | |
| 4150 | return 0; |
| 4151 | } |
| 4152 | |
| 4153 | #ifdef INET6 |
| 4154 | /* |
| 4155 | * compare my own address for IPv6. |
| 4156 | * 1: ours |
| 4157 | * 0: other |
| 4158 | * NOTE: derived ip6_input() in KAME. This is necessary to modify more. |
| 4159 | */ |
| 4160 | #include <netinet6/in6_var.h> |
| 4161 | |
| 4162 | static int |
| 4163 | key_ismyaddr6(const struct sockaddr_in6 *sin6) |
| 4164 | { |
| 4165 | struct in6_ifaddr *ia; |
| 4166 | const struct in6_multi *in6m; |
| 4167 | int s; |
| 4168 | |
| 4169 | s = pserialize_read_enter(); |
| 4170 | IN6_ADDRLIST_READER_FOREACH(ia) { |
| 4171 | if (key_sockaddrcmp((const struct sockaddr *)&sin6, |
| 4172 | (const struct sockaddr *)&ia->ia_addr, 0) == 0) { |
| 4173 | pserialize_read_exit(s); |
| 4174 | return 1; |
| 4175 | } |
| 4176 | |
| 4177 | /* |
| 4178 | * XXX Multicast |
| 4179 | * XXX why do we care about multlicast here while we don't care |
| 4180 | * about IPv4 multicast?? |
| 4181 | * XXX scope |
| 4182 | */ |
| 4183 | in6m = NULL; |
| 4184 | #ifdef __FreeBSD__ |
| 4185 | IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); |
| 4186 | #else |
| 4187 | for ((in6m) = ia->ia6_multiaddrs.lh_first; |
| 4188 | (in6m) != NULL && |
| 4189 | !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); |
| 4190 | (in6m) = in6m->in6m_entry.le_next) |
| 4191 | continue; |
| 4192 | #endif |
| 4193 | if (in6m) { |
| 4194 | pserialize_read_exit(s); |
| 4195 | return 1; |
| 4196 | } |
| 4197 | } |
| 4198 | pserialize_read_exit(s); |
| 4199 | |
| 4200 | /* loopback, just for safety */ |
| 4201 | if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) |
| 4202 | return 1; |
| 4203 | |
| 4204 | return 0; |
| 4205 | } |
| 4206 | #endif /*INET6*/ |
| 4207 | |
| 4208 | /* |
| 4209 | * compare two secasindex structure. |
| 4210 | * flag can specify to compare 2 saidxes. |
| 4211 | * compare two secasindex structure without both mode and reqid. |
| 4212 | * don't compare port. |
| 4213 | * IN: |
| 4214 | * saidx0: source, it can be in SAD. |
| 4215 | * saidx1: object. |
| 4216 | * OUT: |
| 4217 | * 1 : equal |
| 4218 | * 0 : not equal |
| 4219 | */ |
| 4220 | static int |
| 4221 | key_cmpsaidx( |
| 4222 | const struct secasindex *saidx0, |
| 4223 | const struct secasindex *saidx1, |
| 4224 | int flag) |
| 4225 | { |
| 4226 | int chkport; |
| 4227 | const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; |
| 4228 | |
| 4229 | /* sanity */ |
| 4230 | if (saidx0 == NULL && saidx1 == NULL) |
| 4231 | return 1; |
| 4232 | |
| 4233 | if (saidx0 == NULL || saidx1 == NULL) |
| 4234 | return 0; |
| 4235 | |
| 4236 | if (saidx0->proto != saidx1->proto) |
| 4237 | return 0; |
| 4238 | |
| 4239 | if (flag == CMP_EXACTLY) { |
| 4240 | if (saidx0->mode != saidx1->mode) |
| 4241 | return 0; |
| 4242 | if (saidx0->reqid != saidx1->reqid) |
| 4243 | return 0; |
| 4244 | if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || |
| 4245 | memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) |
| 4246 | return 0; |
| 4247 | } else { |
| 4248 | |
| 4249 | /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ |
| 4250 | if (flag == CMP_MODE_REQID |
| 4251 | ||flag == CMP_REQID) { |
| 4252 | /* |
| 4253 | * If reqid of SPD is non-zero, unique SA is required. |
| 4254 | * The result must be of same reqid in this case. |
| 4255 | */ |
| 4256 | if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) |
| 4257 | return 0; |
| 4258 | } |
| 4259 | |
| 4260 | if (flag == CMP_MODE_REQID) { |
| 4261 | if (saidx0->mode != IPSEC_MODE_ANY |
| 4262 | && saidx0->mode != saidx1->mode) |
| 4263 | return 0; |
| 4264 | } |
| 4265 | |
| 4266 | |
| 4267 | sa0src = &saidx0->src.sa; |
| 4268 | sa0dst = &saidx0->dst.sa; |
| 4269 | sa1src = &saidx1->src.sa; |
| 4270 | sa1dst = &saidx1->dst.sa; |
| 4271 | /* |
| 4272 | * If NAT-T is enabled, check ports for tunnel mode. |
| 4273 | * Don't do it for transport mode, as there is no |
| 4274 | * port information available in the SP. |
| 4275 | * Also don't check ports if they are set to zero |
| 4276 | * in the SPD: This means we have a non-generated |
| 4277 | * SPD which can't know UDP ports. |
| 4278 | */ |
| 4279 | if (saidx1->mode == IPSEC_MODE_TUNNEL) |
| 4280 | chkport = PORT_LOOSE; |
| 4281 | else |
| 4282 | chkport = PORT_NONE; |
| 4283 | |
| 4284 | if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { |
| 4285 | return 0; |
| 4286 | } |
| 4287 | if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { |
| 4288 | return 0; |
| 4289 | } |
| 4290 | } |
| 4291 | |
| 4292 | return 1; |
| 4293 | } |
| 4294 | |
| 4295 | /* |
| 4296 | * compare two secindex structure exactly. |
| 4297 | * IN: |
| 4298 | * spidx0: source, it is often in SPD. |
| 4299 | * spidx1: object, it is often from PFKEY message. |
| 4300 | * OUT: |
| 4301 | * 1 : equal |
| 4302 | * 0 : not equal |
| 4303 | */ |
| 4304 | int |
| 4305 | key_cmpspidx_exactly( |
| 4306 | const struct secpolicyindex *spidx0, |
| 4307 | const struct secpolicyindex *spidx1) |
| 4308 | { |
| 4309 | /* sanity */ |
| 4310 | if (spidx0 == NULL && spidx1 == NULL) |
| 4311 | return 1; |
| 4312 | |
| 4313 | if (spidx0 == NULL || spidx1 == NULL) |
| 4314 | return 0; |
| 4315 | |
| 4316 | if (spidx0->prefs != spidx1->prefs |
| 4317 | || spidx0->prefd != spidx1->prefd |
| 4318 | || spidx0->ul_proto != spidx1->ul_proto) |
| 4319 | return 0; |
| 4320 | |
| 4321 | return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && |
| 4322 | key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; |
| 4323 | } |
| 4324 | |
| 4325 | /* |
| 4326 | * compare two secindex structure with mask. |
| 4327 | * IN: |
| 4328 | * spidx0: source, it is often in SPD. |
| 4329 | * spidx1: object, it is often from IP header. |
| 4330 | * OUT: |
| 4331 | * 1 : equal |
| 4332 | * 0 : not equal |
| 4333 | */ |
| 4334 | int |
| 4335 | key_cmpspidx_withmask( |
| 4336 | const struct secpolicyindex *spidx0, |
| 4337 | const struct secpolicyindex *spidx1) |
| 4338 | { |
| 4339 | /* sanity */ |
| 4340 | if (spidx0 == NULL && spidx1 == NULL) |
| 4341 | return 1; |
| 4342 | |
| 4343 | if (spidx0 == NULL || spidx1 == NULL) |
| 4344 | return 0; |
| 4345 | |
| 4346 | if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || |
| 4347 | spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || |
| 4348 | spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || |
| 4349 | spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) |
| 4350 | return 0; |
| 4351 | |
| 4352 | /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ |
| 4353 | if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY |
| 4354 | && spidx0->ul_proto != spidx1->ul_proto) |
| 4355 | return 0; |
| 4356 | |
| 4357 | switch (spidx0->src.sa.sa_family) { |
| 4358 | case AF_INET: |
| 4359 | if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY |
| 4360 | && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) |
| 4361 | return 0; |
| 4362 | if (!key_bbcmp(&spidx0->src.sin.sin_addr, |
| 4363 | &spidx1->src.sin.sin_addr, spidx0->prefs)) |
| 4364 | return 0; |
| 4365 | break; |
| 4366 | case AF_INET6: |
| 4367 | if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY |
| 4368 | && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) |
| 4369 | return 0; |
| 4370 | /* |
| 4371 | * scope_id check. if sin6_scope_id is 0, we regard it |
| 4372 | * as a wildcard scope, which matches any scope zone ID. |
| 4373 | */ |
| 4374 | if (spidx0->src.sin6.sin6_scope_id && |
| 4375 | spidx1->src.sin6.sin6_scope_id && |
| 4376 | spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) |
| 4377 | return 0; |
| 4378 | if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, |
| 4379 | &spidx1->src.sin6.sin6_addr, spidx0->prefs)) |
| 4380 | return 0; |
| 4381 | break; |
| 4382 | default: |
| 4383 | /* XXX */ |
| 4384 | if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) |
| 4385 | return 0; |
| 4386 | break; |
| 4387 | } |
| 4388 | |
| 4389 | switch (spidx0->dst.sa.sa_family) { |
| 4390 | case AF_INET: |
| 4391 | if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY |
| 4392 | && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) |
| 4393 | return 0; |
| 4394 | if (!key_bbcmp(&spidx0->dst.sin.sin_addr, |
| 4395 | &spidx1->dst.sin.sin_addr, spidx0->prefd)) |
| 4396 | return 0; |
| 4397 | break; |
| 4398 | case AF_INET6: |
| 4399 | if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY |
| 4400 | && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) |
| 4401 | return 0; |
| 4402 | /* |
| 4403 | * scope_id check. if sin6_scope_id is 0, we regard it |
| 4404 | * as a wildcard scope, which matches any scope zone ID. |
| 4405 | */ |
| 4406 | if (spidx0->src.sin6.sin6_scope_id && |
| 4407 | spidx1->src.sin6.sin6_scope_id && |
| 4408 | spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) |
| 4409 | return 0; |
| 4410 | if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, |
| 4411 | &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) |
| 4412 | return 0; |
| 4413 | break; |
| 4414 | default: |
| 4415 | /* XXX */ |
| 4416 | if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) |
| 4417 | return 0; |
| 4418 | break; |
| 4419 | } |
| 4420 | |
| 4421 | /* XXX Do we check other field ? e.g. flowinfo */ |
| 4422 | |
| 4423 | return 1; |
| 4424 | } |
| 4425 | |
| 4426 | /* returns 0 on match */ |
| 4427 | static int |
| 4428 | key_portcomp(in_port_t port1, in_port_t port2, int howport) |
| 4429 | { |
| 4430 | switch (howport) { |
| 4431 | case PORT_NONE: |
| 4432 | return 0; |
| 4433 | case PORT_LOOSE: |
| 4434 | if (port1 == 0 || port2 == 0) |
| 4435 | return 0; |
| 4436 | /*FALLTHROUGH*/ |
| 4437 | case PORT_STRICT: |
| 4438 | if (port1 != port2) { |
| 4439 | KEYDEBUG(KEYDEBUG_MATCH, |
| 4440 | printf("port fail %d != %d\n" , port1, port2)); |
| 4441 | return 1; |
| 4442 | } |
| 4443 | return 0; |
| 4444 | default: |
| 4445 | KASSERT(0); |
| 4446 | return 1; |
| 4447 | } |
| 4448 | } |
| 4449 | |
| 4450 | /* returns 0 on match */ |
| 4451 | static int |
| 4452 | key_sockaddrcmp( |
| 4453 | const struct sockaddr *sa1, |
| 4454 | const struct sockaddr *sa2, |
| 4455 | int howport) |
| 4456 | { |
| 4457 | const struct sockaddr_in *sin1, *sin2; |
| 4458 | const struct sockaddr_in6 *sin61, *sin62; |
| 4459 | |
| 4460 | if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { |
| 4461 | KEYDEBUG(KEYDEBUG_MATCH, |
| 4462 | printf("fam/len fail %d != %d || %d != %d\n" , |
| 4463 | sa1->sa_family, sa2->sa_family, sa1->sa_len, |
| 4464 | sa2->sa_len)); |
| 4465 | return 1; |
| 4466 | } |
| 4467 | |
| 4468 | switch (sa1->sa_family) { |
| 4469 | case AF_INET: |
| 4470 | if (sa1->sa_len != sizeof(struct sockaddr_in)) { |
| 4471 | KEYDEBUG(KEYDEBUG_MATCH, |
| 4472 | printf("len fail %d != %zu\n" , |
| 4473 | sa1->sa_len, sizeof(struct sockaddr_in))); |
| 4474 | return 1; |
| 4475 | } |
| 4476 | sin1 = (const struct sockaddr_in *)sa1; |
| 4477 | sin2 = (const struct sockaddr_in *)sa2; |
| 4478 | if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { |
| 4479 | KEYDEBUG(KEYDEBUG_MATCH, |
| 4480 | printf("addr fail %#x != %#x\n" , |
| 4481 | sin1->sin_addr.s_addr, |
| 4482 | sin2->sin_addr.s_addr)); |
| 4483 | return 1; |
| 4484 | } |
| 4485 | if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { |
| 4486 | return 1; |
| 4487 | } |
| 4488 | KEYDEBUG(KEYDEBUG_MATCH, |
| 4489 | printf("addr success %#x[%d] == %#x[%d]\n" , |
| 4490 | sin1->sin_addr.s_addr, |
| 4491 | sin1->sin_port, |
| 4492 | sin2->sin_addr.s_addr, |
| 4493 | sin2->sin_port)); |
| 4494 | break; |
| 4495 | case AF_INET6: |
| 4496 | sin61 = (const struct sockaddr_in6 *)sa1; |
| 4497 | sin62 = (const struct sockaddr_in6 *)sa2; |
| 4498 | if (sa1->sa_len != sizeof(struct sockaddr_in6)) |
| 4499 | return 1; /*EINVAL*/ |
| 4500 | |
| 4501 | if (sin61->sin6_scope_id != sin62->sin6_scope_id) { |
| 4502 | return 1; |
| 4503 | } |
| 4504 | if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { |
| 4505 | return 1; |
| 4506 | } |
| 4507 | if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { |
| 4508 | return 1; |
| 4509 | } |
| 4510 | break; |
| 4511 | default: |
| 4512 | if (memcmp(sa1, sa2, sa1->sa_len) != 0) |
| 4513 | return 1; |
| 4514 | break; |
| 4515 | } |
| 4516 | |
| 4517 | return 0; |
| 4518 | } |
| 4519 | |
| 4520 | /* |
| 4521 | * compare two buffers with mask. |
| 4522 | * IN: |
| 4523 | * addr1: source |
| 4524 | * addr2: object |
| 4525 | * bits: Number of bits to compare |
| 4526 | * OUT: |
| 4527 | * 1 : equal |
| 4528 | * 0 : not equal |
| 4529 | */ |
| 4530 | static int |
| 4531 | key_bbcmp(const void *a1, const void *a2, u_int bits) |
| 4532 | { |
| 4533 | const unsigned char *p1 = a1; |
| 4534 | const unsigned char *p2 = a2; |
| 4535 | |
| 4536 | /* XXX: This could be considerably faster if we compare a word |
| 4537 | * at a time, but it is complicated on LSB Endian machines */ |
| 4538 | |
| 4539 | /* Handle null pointers */ |
| 4540 | if (p1 == NULL || p2 == NULL) |
| 4541 | return (p1 == p2); |
| 4542 | |
| 4543 | while (bits >= 8) { |
| 4544 | if (*p1++ != *p2++) |
| 4545 | return 0; |
| 4546 | bits -= 8; |
| 4547 | } |
| 4548 | |
| 4549 | if (bits > 0) { |
| 4550 | u_int8_t mask = ~((1<<(8-bits))-1); |
| 4551 | if ((*p1 & mask) != (*p2 & mask)) |
| 4552 | return 0; |
| 4553 | } |
| 4554 | return 1; /* Match! */ |
| 4555 | } |
| 4556 | |
| 4557 | /* |
| 4558 | * time handler. |
| 4559 | * scanning SPD and SAD to check status for each entries, |
| 4560 | * and do to remove or to expire. |
| 4561 | */ |
| 4562 | void |
| 4563 | key_timehandler(void* arg) |
| 4564 | { |
| 4565 | u_int dir; |
| 4566 | int s; |
| 4567 | time_t now = time_uptime; |
| 4568 | |
| 4569 | s = splsoftnet(); /*called from softclock()*/ |
| 4570 | mutex_enter(softnet_lock); |
| 4571 | |
| 4572 | /* SPD */ |
| 4573 | { |
| 4574 | struct secpolicy *sp, *nextsp; |
| 4575 | |
| 4576 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 4577 | for (sp = LIST_FIRST(&sptree[dir]); |
| 4578 | sp != NULL; |
| 4579 | sp = nextsp) { |
| 4580 | |
| 4581 | nextsp = LIST_NEXT(sp, chain); |
| 4582 | |
| 4583 | if (sp->state == IPSEC_SPSTATE_DEAD) { |
| 4584 | key_sp_unlink(sp); /*XXX*/ |
| 4585 | |
| 4586 | /* 'sp' dead; continue transfers to |
| 4587 | * 'sp = nextsp' |
| 4588 | */ |
| 4589 | continue; |
| 4590 | } |
| 4591 | |
| 4592 | if (sp->lifetime == 0 && sp->validtime == 0) |
| 4593 | continue; |
| 4594 | |
| 4595 | /* the deletion will occur next time */ |
| 4596 | if ((sp->lifetime && now - sp->created > sp->lifetime) |
| 4597 | || (sp->validtime && now - sp->lastused > sp->validtime)) { |
| 4598 | key_sp_dead(sp); |
| 4599 | key_spdexpire(sp); |
| 4600 | continue; |
| 4601 | } |
| 4602 | } |
| 4603 | } |
| 4604 | } |
| 4605 | |
| 4606 | /* SAD */ |
| 4607 | { |
| 4608 | struct secashead *sah, *nextsah; |
| 4609 | struct secasvar *sav, *nextsav; |
| 4610 | |
| 4611 | for (sah = LIST_FIRST(&sahtree); |
| 4612 | sah != NULL; |
| 4613 | sah = nextsah) { |
| 4614 | |
| 4615 | nextsah = LIST_NEXT(sah, chain); |
| 4616 | |
| 4617 | /* if sah has been dead, then delete it and process next sah. */ |
| 4618 | if (sah->state == SADB_SASTATE_DEAD) { |
| 4619 | key_delsah(sah); |
| 4620 | continue; |
| 4621 | } |
| 4622 | |
| 4623 | /* if LARVAL entry doesn't become MATURE, delete it. */ |
| 4624 | for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); |
| 4625 | sav != NULL; |
| 4626 | sav = nextsav) { |
| 4627 | |
| 4628 | nextsav = LIST_NEXT(sav, chain); |
| 4629 | |
| 4630 | if (now - sav->created > key_larval_lifetime) { |
| 4631 | KEY_FREESAV(&sav); |
| 4632 | } |
| 4633 | } |
| 4634 | |
| 4635 | /* |
| 4636 | * check MATURE entry to start to send expire message |
| 4637 | * whether or not. |
| 4638 | */ |
| 4639 | for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); |
| 4640 | sav != NULL; |
| 4641 | sav = nextsav) { |
| 4642 | |
| 4643 | nextsav = LIST_NEXT(sav, chain); |
| 4644 | |
| 4645 | /* we don't need to check. */ |
| 4646 | if (sav->lft_s == NULL) |
| 4647 | continue; |
| 4648 | |
| 4649 | /* sanity check */ |
| 4650 | if (sav->lft_c == NULL) { |
| 4651 | ipseclog((LOG_DEBUG,"key_timehandler: " |
| 4652 | "There is no CURRENT time, why?\n" )); |
| 4653 | continue; |
| 4654 | } |
| 4655 | |
| 4656 | /* check SOFT lifetime */ |
| 4657 | if (sav->lft_s->sadb_lifetime_addtime != 0 |
| 4658 | && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { |
| 4659 | /* |
| 4660 | * check SA to be used whether or not. |
| 4661 | * when SA hasn't been used, delete it. |
| 4662 | */ |
| 4663 | if (sav->lft_c->sadb_lifetime_usetime == 0) { |
| 4664 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 4665 | KEY_FREESAV(&sav); |
| 4666 | } else { |
| 4667 | key_sa_chgstate(sav, SADB_SASTATE_DYING); |
| 4668 | /* |
| 4669 | * XXX If we keep to send expire |
| 4670 | * message in the status of |
| 4671 | * DYING. Do remove below code. |
| 4672 | */ |
| 4673 | key_expire(sav); |
| 4674 | } |
| 4675 | } |
| 4676 | /* check SOFT lifetime by bytes */ |
| 4677 | /* |
| 4678 | * XXX I don't know the way to delete this SA |
| 4679 | * when new SA is installed. Caution when it's |
| 4680 | * installed too big lifetime by time. |
| 4681 | */ |
| 4682 | else if (sav->lft_s->sadb_lifetime_bytes != 0 |
| 4683 | && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { |
| 4684 | |
| 4685 | key_sa_chgstate(sav, SADB_SASTATE_DYING); |
| 4686 | /* |
| 4687 | * XXX If we keep to send expire |
| 4688 | * message in the status of |
| 4689 | * DYING. Do remove below code. |
| 4690 | */ |
| 4691 | key_expire(sav); |
| 4692 | } |
| 4693 | } |
| 4694 | |
| 4695 | /* check DYING entry to change status to DEAD. */ |
| 4696 | for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); |
| 4697 | sav != NULL; |
| 4698 | sav = nextsav) { |
| 4699 | |
| 4700 | nextsav = LIST_NEXT(sav, chain); |
| 4701 | |
| 4702 | /* we don't need to check. */ |
| 4703 | if (sav->lft_h == NULL) |
| 4704 | continue; |
| 4705 | |
| 4706 | /* sanity check */ |
| 4707 | if (sav->lft_c == NULL) { |
| 4708 | ipseclog((LOG_DEBUG, "key_timehandler: " |
| 4709 | "There is no CURRENT time, why?\n" )); |
| 4710 | continue; |
| 4711 | } |
| 4712 | |
| 4713 | if (sav->lft_h->sadb_lifetime_addtime != 0 |
| 4714 | && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { |
| 4715 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 4716 | KEY_FREESAV(&sav); |
| 4717 | } |
| 4718 | #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ |
| 4719 | else if (sav->lft_s != NULL |
| 4720 | && sav->lft_s->sadb_lifetime_addtime != 0 |
| 4721 | && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { |
| 4722 | /* |
| 4723 | * XXX: should be checked to be |
| 4724 | * installed the valid SA. |
| 4725 | */ |
| 4726 | |
| 4727 | /* |
| 4728 | * If there is no SA then sending |
| 4729 | * expire message. |
| 4730 | */ |
| 4731 | key_expire(sav); |
| 4732 | } |
| 4733 | #endif |
| 4734 | /* check HARD lifetime by bytes */ |
| 4735 | else if (sav->lft_h->sadb_lifetime_bytes != 0 |
| 4736 | && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { |
| 4737 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 4738 | KEY_FREESAV(&sav); |
| 4739 | } |
| 4740 | } |
| 4741 | |
| 4742 | /* delete entry in DEAD */ |
| 4743 | for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); |
| 4744 | sav != NULL; |
| 4745 | sav = nextsav) { |
| 4746 | |
| 4747 | nextsav = LIST_NEXT(sav, chain); |
| 4748 | |
| 4749 | /* sanity check */ |
| 4750 | if (sav->state != SADB_SASTATE_DEAD) { |
| 4751 | ipseclog((LOG_DEBUG, "key_timehandler: " |
| 4752 | "invalid sav->state " |
| 4753 | "(queue: %d SA: %d): " |
| 4754 | "kill it anyway\n" , |
| 4755 | SADB_SASTATE_DEAD, sav->state)); |
| 4756 | } |
| 4757 | |
| 4758 | /* |
| 4759 | * do not call key_freesav() here. |
| 4760 | * sav should already be freed, and sav->refcnt |
| 4761 | * shows other references to sav |
| 4762 | * (such as from SPD). |
| 4763 | */ |
| 4764 | } |
| 4765 | } |
| 4766 | } |
| 4767 | |
| 4768 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 4769 | /* ACQ tree */ |
| 4770 | { |
| 4771 | struct secacq *acq, *nextacq; |
| 4772 | |
| 4773 | for (acq = LIST_FIRST(&acqtree); |
| 4774 | acq != NULL; |
| 4775 | acq = nextacq) { |
| 4776 | |
| 4777 | nextacq = LIST_NEXT(acq, chain); |
| 4778 | |
| 4779 | if (now - acq->created > key_blockacq_lifetime |
| 4780 | && __LIST_CHAINED(acq)) { |
| 4781 | LIST_REMOVE(acq, chain); |
| 4782 | KFREE(acq); |
| 4783 | } |
| 4784 | } |
| 4785 | } |
| 4786 | #endif |
| 4787 | |
| 4788 | /* SP ACQ tree */ |
| 4789 | { |
| 4790 | struct secspacq *acq, *nextacq; |
| 4791 | |
| 4792 | for (acq = LIST_FIRST(&spacqtree); |
| 4793 | acq != NULL; |
| 4794 | acq = nextacq) { |
| 4795 | |
| 4796 | nextacq = LIST_NEXT(acq, chain); |
| 4797 | |
| 4798 | if (now - acq->created > key_blockacq_lifetime |
| 4799 | && __LIST_CHAINED(acq)) { |
| 4800 | LIST_REMOVE(acq, chain); |
| 4801 | KFREE(acq); |
| 4802 | } |
| 4803 | } |
| 4804 | } |
| 4805 | |
| 4806 | #ifndef IPSEC_DEBUG2 |
| 4807 | /* do exchange to tick time !! */ |
| 4808 | callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); |
| 4809 | #endif /* IPSEC_DEBUG2 */ |
| 4810 | |
| 4811 | mutex_exit(softnet_lock); |
| 4812 | splx(s); |
| 4813 | return; |
| 4814 | } |
| 4815 | |
| 4816 | u_long |
| 4817 | key_random(void) |
| 4818 | { |
| 4819 | u_long value; |
| 4820 | |
| 4821 | key_randomfill(&value, sizeof(value)); |
| 4822 | return value; |
| 4823 | } |
| 4824 | |
| 4825 | void |
| 4826 | key_randomfill(void *p, size_t l) |
| 4827 | { |
| 4828 | |
| 4829 | cprng_fast(p, l); |
| 4830 | } |
| 4831 | |
| 4832 | /* |
| 4833 | * map SADB_SATYPE_* to IPPROTO_*. |
| 4834 | * if satype == SADB_SATYPE then satype is mapped to ~0. |
| 4835 | * OUT: |
| 4836 | * 0: invalid satype. |
| 4837 | */ |
| 4838 | static u_int16_t |
| 4839 | key_satype2proto(u_int8_t satype) |
| 4840 | { |
| 4841 | switch (satype) { |
| 4842 | case SADB_SATYPE_UNSPEC: |
| 4843 | return IPSEC_PROTO_ANY; |
| 4844 | case SADB_SATYPE_AH: |
| 4845 | return IPPROTO_AH; |
| 4846 | case SADB_SATYPE_ESP: |
| 4847 | return IPPROTO_ESP; |
| 4848 | case SADB_X_SATYPE_IPCOMP: |
| 4849 | return IPPROTO_IPCOMP; |
| 4850 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 4851 | return IPPROTO_TCP; |
| 4852 | default: |
| 4853 | return 0; |
| 4854 | } |
| 4855 | /* NOTREACHED */ |
| 4856 | } |
| 4857 | |
| 4858 | /* |
| 4859 | * map IPPROTO_* to SADB_SATYPE_* |
| 4860 | * OUT: |
| 4861 | * 0: invalid protocol type. |
| 4862 | */ |
| 4863 | static u_int8_t |
| 4864 | key_proto2satype(u_int16_t proto) |
| 4865 | { |
| 4866 | switch (proto) { |
| 4867 | case IPPROTO_AH: |
| 4868 | return SADB_SATYPE_AH; |
| 4869 | case IPPROTO_ESP: |
| 4870 | return SADB_SATYPE_ESP; |
| 4871 | case IPPROTO_IPCOMP: |
| 4872 | return SADB_X_SATYPE_IPCOMP; |
| 4873 | case IPPROTO_TCP: |
| 4874 | return SADB_X_SATYPE_TCPSIGNATURE; |
| 4875 | default: |
| 4876 | return 0; |
| 4877 | } |
| 4878 | /* NOTREACHED */ |
| 4879 | } |
| 4880 | |
| 4881 | static int |
| 4882 | key_setsecasidx(int proto, int mode, int reqid, |
| 4883 | const struct sadb_address * src, |
| 4884 | const struct sadb_address * dst, |
| 4885 | struct secasindex * saidx) |
| 4886 | { |
| 4887 | const union sockaddr_union * src_u = |
| 4888 | (const union sockaddr_union *) src; |
| 4889 | const union sockaddr_union * dst_u = |
| 4890 | (const union sockaddr_union *) dst; |
| 4891 | |
| 4892 | /* sa len safety check */ |
| 4893 | if (key_checksalen(src_u) != 0) |
| 4894 | return -1; |
| 4895 | if (key_checksalen(dst_u) != 0) |
| 4896 | return -1; |
| 4897 | |
| 4898 | memset(saidx, 0, sizeof(*saidx)); |
| 4899 | saidx->proto = proto; |
| 4900 | saidx->mode = mode; |
| 4901 | saidx->reqid = reqid; |
| 4902 | memcpy(&saidx->src, src_u, src_u->sa.sa_len); |
| 4903 | memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); |
| 4904 | |
| 4905 | key_porttosaddr(&((saidx)->src),0); |
| 4906 | key_porttosaddr(&((saidx)->dst),0); |
| 4907 | return 0; |
| 4908 | } |
| 4909 | |
| 4910 | /* %%% PF_KEY */ |
| 4911 | /* |
| 4912 | * SADB_GETSPI processing is to receive |
| 4913 | * <base, (SA2), src address, dst address, (SPI range)> |
| 4914 | * from the IKMPd, to assign a unique spi value, to hang on the INBOUND |
| 4915 | * tree with the status of LARVAL, and send |
| 4916 | * <base, SA(*), address(SD)> |
| 4917 | * to the IKMPd. |
| 4918 | * |
| 4919 | * IN: mhp: pointer to the pointer to each header. |
| 4920 | * OUT: NULL if fail. |
| 4921 | * other if success, return pointer to the message to send. |
| 4922 | */ |
| 4923 | static int |
| 4924 | key_getspi(struct socket *so, struct mbuf *m, |
| 4925 | const struct sadb_msghdr *mhp) |
| 4926 | { |
| 4927 | struct sadb_address *src0, *dst0; |
| 4928 | struct secasindex saidx; |
| 4929 | struct secashead *newsah; |
| 4930 | struct secasvar *newsav; |
| 4931 | u_int8_t proto; |
| 4932 | u_int32_t spi; |
| 4933 | u_int8_t mode; |
| 4934 | u_int16_t reqid; |
| 4935 | int error; |
| 4936 | |
| 4937 | /* sanity check */ |
| 4938 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 4939 | panic("key_getspi: NULL pointer is passed" ); |
| 4940 | |
| 4941 | if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 4942 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { |
| 4943 | ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n" )); |
| 4944 | return key_senderror(so, m, EINVAL); |
| 4945 | } |
| 4946 | if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 4947 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { |
| 4948 | ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n" )); |
| 4949 | return key_senderror(so, m, EINVAL); |
| 4950 | } |
| 4951 | if (mhp->ext[SADB_X_EXT_SA2] != NULL) { |
| 4952 | mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; |
| 4953 | reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; |
| 4954 | } else { |
| 4955 | mode = IPSEC_MODE_ANY; |
| 4956 | reqid = 0; |
| 4957 | } |
| 4958 | |
| 4959 | src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); |
| 4960 | dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); |
| 4961 | |
| 4962 | /* map satype to proto */ |
| 4963 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 4964 | ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n" )); |
| 4965 | return key_senderror(so, m, EINVAL); |
| 4966 | } |
| 4967 | |
| 4968 | |
| 4969 | if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, |
| 4970 | dst0 + 1, &saidx)) != 0) |
| 4971 | return key_senderror(so, m, EINVAL); |
| 4972 | |
| 4973 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 4974 | return key_senderror(so, m, EINVAL); |
| 4975 | |
| 4976 | /* SPI allocation */ |
| 4977 | spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], |
| 4978 | &saidx); |
| 4979 | if (spi == 0) |
| 4980 | return key_senderror(so, m, EINVAL); |
| 4981 | |
| 4982 | /* get a SA index */ |
| 4983 | if ((newsah = key_getsah(&saidx)) == NULL) { |
| 4984 | /* create a new SA index */ |
| 4985 | if ((newsah = key_newsah(&saidx)) == NULL) { |
| 4986 | ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n" )); |
| 4987 | return key_senderror(so, m, ENOBUFS); |
| 4988 | } |
| 4989 | } |
| 4990 | |
| 4991 | /* get a new SA */ |
| 4992 | /* XXX rewrite */ |
| 4993 | newsav = KEY_NEWSAV(m, mhp, newsah, &error); |
| 4994 | if (newsav == NULL) { |
| 4995 | /* XXX don't free new SA index allocated in above. */ |
| 4996 | return key_senderror(so, m, error); |
| 4997 | } |
| 4998 | |
| 4999 | /* set spi */ |
| 5000 | newsav->spi = htonl(spi); |
| 5001 | |
| 5002 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 5003 | /* delete the entry in acqtree */ |
| 5004 | if (mhp->msg->sadb_msg_seq != 0) { |
| 5005 | struct secacq *acq; |
| 5006 | if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { |
| 5007 | /* reset counter in order to deletion by timehandler. */ |
| 5008 | acq->created = time_uptime; |
| 5009 | acq->count = 0; |
| 5010 | } |
| 5011 | } |
| 5012 | #endif |
| 5013 | |
| 5014 | { |
| 5015 | struct mbuf *n, *nn; |
| 5016 | struct sadb_sa *m_sa; |
| 5017 | struct sadb_msg *newmsg; |
| 5018 | int off, len; |
| 5019 | |
| 5020 | /* create new sadb_msg to reply. */ |
| 5021 | len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + |
| 5022 | PFKEY_ALIGN8(sizeof(struct sadb_sa)); |
| 5023 | if (len > MCLBYTES) |
| 5024 | return key_senderror(so, m, ENOBUFS); |
| 5025 | |
| 5026 | MGETHDR(n, M_DONTWAIT, MT_DATA); |
| 5027 | if (len > MHLEN) { |
| 5028 | MCLGET(n, M_DONTWAIT); |
| 5029 | if ((n->m_flags & M_EXT) == 0) { |
| 5030 | m_freem(n); |
| 5031 | n = NULL; |
| 5032 | } |
| 5033 | } |
| 5034 | if (!n) |
| 5035 | return key_senderror(so, m, ENOBUFS); |
| 5036 | |
| 5037 | n->m_len = len; |
| 5038 | n->m_next = NULL; |
| 5039 | off = 0; |
| 5040 | |
| 5041 | m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); |
| 5042 | off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 5043 | |
| 5044 | m_sa = (struct sadb_sa *)(mtod(n, char *) + off); |
| 5045 | m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); |
| 5046 | m_sa->sadb_sa_exttype = SADB_EXT_SA; |
| 5047 | m_sa->sadb_sa_spi = htonl(spi); |
| 5048 | off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); |
| 5049 | |
| 5050 | #ifdef DIAGNOSTIC |
| 5051 | if (off != len) |
| 5052 | panic("length inconsistency in key_getspi" ); |
| 5053 | #endif |
| 5054 | |
| 5055 | n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, |
| 5056 | SADB_EXT_ADDRESS_DST); |
| 5057 | if (!n->m_next) { |
| 5058 | m_freem(n); |
| 5059 | return key_senderror(so, m, ENOBUFS); |
| 5060 | } |
| 5061 | |
| 5062 | if (n->m_len < sizeof(struct sadb_msg)) { |
| 5063 | n = m_pullup(n, sizeof(struct sadb_msg)); |
| 5064 | if (n == NULL) |
| 5065 | return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); |
| 5066 | } |
| 5067 | |
| 5068 | n->m_pkthdr.len = 0; |
| 5069 | for (nn = n; nn; nn = nn->m_next) |
| 5070 | n->m_pkthdr.len += nn->m_len; |
| 5071 | |
| 5072 | newmsg = mtod(n, struct sadb_msg *); |
| 5073 | newmsg->sadb_msg_seq = newsav->seq; |
| 5074 | newmsg->sadb_msg_errno = 0; |
| 5075 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 5076 | |
| 5077 | m_freem(m); |
| 5078 | return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); |
| 5079 | } |
| 5080 | } |
| 5081 | |
| 5082 | /* |
| 5083 | * allocating new SPI |
| 5084 | * called by key_getspi(). |
| 5085 | * OUT: |
| 5086 | * 0: failure. |
| 5087 | * others: success. |
| 5088 | */ |
| 5089 | static u_int32_t |
| 5090 | key_do_getnewspi(const struct sadb_spirange *spirange, |
| 5091 | const struct secasindex *saidx) |
| 5092 | { |
| 5093 | u_int32_t newspi; |
| 5094 | u_int32_t spmin, spmax; |
| 5095 | int count = key_spi_trycnt; |
| 5096 | |
| 5097 | /* set spi range to allocate */ |
| 5098 | if (spirange != NULL) { |
| 5099 | spmin = spirange->sadb_spirange_min; |
| 5100 | spmax = spirange->sadb_spirange_max; |
| 5101 | } else { |
| 5102 | spmin = key_spi_minval; |
| 5103 | spmax = key_spi_maxval; |
| 5104 | } |
| 5105 | /* IPCOMP needs 2-byte SPI */ |
| 5106 | if (saidx->proto == IPPROTO_IPCOMP) { |
| 5107 | u_int32_t t; |
| 5108 | if (spmin >= 0x10000) |
| 5109 | spmin = 0xffff; |
| 5110 | if (spmax >= 0x10000) |
| 5111 | spmax = 0xffff; |
| 5112 | if (spmin > spmax) { |
| 5113 | t = spmin; spmin = spmax; spmax = t; |
| 5114 | } |
| 5115 | } |
| 5116 | |
| 5117 | if (spmin == spmax) { |
| 5118 | if (key_checkspidup(saidx, htonl(spmin)) != NULL) { |
| 5119 | ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n" , spmin)); |
| 5120 | return 0; |
| 5121 | } |
| 5122 | |
| 5123 | count--; /* taking one cost. */ |
| 5124 | newspi = spmin; |
| 5125 | |
| 5126 | } else { |
| 5127 | |
| 5128 | /* init SPI */ |
| 5129 | newspi = 0; |
| 5130 | |
| 5131 | /* when requesting to allocate spi ranged */ |
| 5132 | while (count--) { |
| 5133 | /* generate pseudo-random SPI value ranged. */ |
| 5134 | newspi = spmin + (key_random() % (spmax - spmin + 1)); |
| 5135 | |
| 5136 | if (key_checkspidup(saidx, htonl(newspi)) == NULL) |
| 5137 | break; |
| 5138 | } |
| 5139 | |
| 5140 | if (count == 0 || newspi == 0) { |
| 5141 | ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n" )); |
| 5142 | return 0; |
| 5143 | } |
| 5144 | } |
| 5145 | |
| 5146 | /* statistics */ |
| 5147 | keystat.getspi_count = |
| 5148 | (keystat.getspi_count + key_spi_trycnt - count) / 2; |
| 5149 | |
| 5150 | return newspi; |
| 5151 | } |
| 5152 | |
| 5153 | static int |
| 5154 | key_handle_natt_info(struct secasvar *sav, |
| 5155 | const struct sadb_msghdr *mhp) |
| 5156 | { |
| 5157 | const char *msg = "?" ; |
| 5158 | struct sadb_x_nat_t_type *type; |
| 5159 | struct sadb_x_nat_t_port *sport, *dport; |
| 5160 | struct sadb_address *iaddr, *raddr; |
| 5161 | struct sadb_x_nat_t_frag *frag; |
| 5162 | |
| 5163 | if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || |
| 5164 | mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || |
| 5165 | mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) |
| 5166 | return 0; |
| 5167 | |
| 5168 | if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { |
| 5169 | msg = "TYPE" ; |
| 5170 | goto bad; |
| 5171 | } |
| 5172 | |
| 5173 | if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { |
| 5174 | msg = "SPORT" ; |
| 5175 | goto bad; |
| 5176 | } |
| 5177 | |
| 5178 | if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { |
| 5179 | msg = "DPORT" ; |
| 5180 | goto bad; |
| 5181 | } |
| 5182 | |
| 5183 | if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { |
| 5184 | ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n" , __func__)); |
| 5185 | if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { |
| 5186 | msg = "OAI" ; |
| 5187 | goto bad; |
| 5188 | } |
| 5189 | } |
| 5190 | |
| 5191 | if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { |
| 5192 | ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n" , __func__)); |
| 5193 | if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { |
| 5194 | msg = "OAR" ; |
| 5195 | goto bad; |
| 5196 | } |
| 5197 | } |
| 5198 | |
| 5199 | if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { |
| 5200 | if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { |
| 5201 | msg = "FRAG" ; |
| 5202 | goto bad; |
| 5203 | } |
| 5204 | } |
| 5205 | |
| 5206 | type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; |
| 5207 | sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; |
| 5208 | dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; |
| 5209 | iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; |
| 5210 | raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; |
| 5211 | frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; |
| 5212 | |
| 5213 | ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n" , |
| 5214 | __func__, type->sadb_x_nat_t_type_type, |
| 5215 | ntohs(sport->sadb_x_nat_t_port_port), |
| 5216 | ntohs(dport->sadb_x_nat_t_port_port))); |
| 5217 | |
| 5218 | sav->natt_type = type->sadb_x_nat_t_type_type; |
| 5219 | key_porttosaddr(&sav->sah->saidx.src, |
| 5220 | sport->sadb_x_nat_t_port_port); |
| 5221 | key_porttosaddr(&sav->sah->saidx.dst, |
| 5222 | dport->sadb_x_nat_t_port_port); |
| 5223 | if (frag) |
| 5224 | sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; |
| 5225 | else |
| 5226 | sav->esp_frag = IP_MAXPACKET; |
| 5227 | |
| 5228 | return 0; |
| 5229 | bad: |
| 5230 | ipseclog((LOG_DEBUG, "%s: invalid message %s\n" , __func__, msg)); |
| 5231 | __USE(msg); |
| 5232 | return -1; |
| 5233 | } |
| 5234 | |
| 5235 | /* Just update the IPSEC_NAT_T ports if present */ |
| 5236 | static int |
| 5237 | key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, |
| 5238 | const struct sadb_msghdr *mhp) |
| 5239 | { |
| 5240 | if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) |
| 5241 | ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n" , __func__)); |
| 5242 | if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) |
| 5243 | ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n" , __func__)); |
| 5244 | |
| 5245 | if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && |
| 5246 | (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && |
| 5247 | (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { |
| 5248 | struct sadb_x_nat_t_type *type; |
| 5249 | struct sadb_x_nat_t_port *sport; |
| 5250 | struct sadb_x_nat_t_port *dport; |
| 5251 | |
| 5252 | if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || |
| 5253 | (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || |
| 5254 | (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { |
| 5255 | ipseclog((LOG_DEBUG, "%s: invalid message\n" , |
| 5256 | __func__)); |
| 5257 | return -1; |
| 5258 | } |
| 5259 | |
| 5260 | type = (struct sadb_x_nat_t_type *) |
| 5261 | mhp->ext[SADB_X_EXT_NAT_T_TYPE]; |
| 5262 | sport = (struct sadb_x_nat_t_port *) |
| 5263 | mhp->ext[SADB_X_EXT_NAT_T_SPORT]; |
| 5264 | dport = (struct sadb_x_nat_t_port *) |
| 5265 | mhp->ext[SADB_X_EXT_NAT_T_DPORT]; |
| 5266 | |
| 5267 | key_porttosaddr(src, sport->sadb_x_nat_t_port_port); |
| 5268 | key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); |
| 5269 | |
| 5270 | ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n" , |
| 5271 | __func__, type->sadb_x_nat_t_type_type, |
| 5272 | ntohs(sport->sadb_x_nat_t_port_port), |
| 5273 | ntohs(dport->sadb_x_nat_t_port_port))); |
| 5274 | } |
| 5275 | |
| 5276 | return 0; |
| 5277 | } |
| 5278 | |
| 5279 | |
| 5280 | /* |
| 5281 | * SADB_UPDATE processing |
| 5282 | * receive |
| 5283 | * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) |
| 5284 | * key(AE), (identity(SD),) (sensitivity)> |
| 5285 | * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. |
| 5286 | * and send |
| 5287 | * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) |
| 5288 | * (identity(SD),) (sensitivity)> |
| 5289 | * to the ikmpd. |
| 5290 | * |
| 5291 | * m will always be freed. |
| 5292 | */ |
| 5293 | static int |
| 5294 | key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) |
| 5295 | { |
| 5296 | struct sadb_sa *sa0; |
| 5297 | struct sadb_address *src0, *dst0; |
| 5298 | struct secasindex saidx; |
| 5299 | struct secashead *sah; |
| 5300 | struct secasvar *sav; |
| 5301 | u_int16_t proto; |
| 5302 | u_int8_t mode; |
| 5303 | u_int16_t reqid; |
| 5304 | int error; |
| 5305 | |
| 5306 | /* sanity check */ |
| 5307 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5308 | panic("key_update: NULL pointer is passed" ); |
| 5309 | |
| 5310 | /* map satype to proto */ |
| 5311 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 5312 | ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n" )); |
| 5313 | return key_senderror(so, m, EINVAL); |
| 5314 | } |
| 5315 | |
| 5316 | if (mhp->ext[SADB_EXT_SA] == NULL || |
| 5317 | mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 5318 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || |
| 5319 | (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && |
| 5320 | mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || |
| 5321 | (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && |
| 5322 | mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || |
| 5323 | (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && |
| 5324 | mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || |
| 5325 | (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && |
| 5326 | mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { |
| 5327 | ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n" )); |
| 5328 | return key_senderror(so, m, EINVAL); |
| 5329 | } |
| 5330 | if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || |
| 5331 | mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 5332 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { |
| 5333 | ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n" )); |
| 5334 | return key_senderror(so, m, EINVAL); |
| 5335 | } |
| 5336 | if (mhp->ext[SADB_X_EXT_SA2] != NULL) { |
| 5337 | mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; |
| 5338 | reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; |
| 5339 | } else { |
| 5340 | mode = IPSEC_MODE_ANY; |
| 5341 | reqid = 0; |
| 5342 | } |
| 5343 | /* XXX boundary checking for other extensions */ |
| 5344 | |
| 5345 | sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 5346 | src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); |
| 5347 | dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); |
| 5348 | |
| 5349 | if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, |
| 5350 | dst0 + 1, &saidx)) != 0) |
| 5351 | return key_senderror(so, m, EINVAL); |
| 5352 | |
| 5353 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 5354 | return key_senderror(so, m, EINVAL); |
| 5355 | |
| 5356 | /* get a SA header */ |
| 5357 | if ((sah = key_getsah(&saidx)) == NULL) { |
| 5358 | ipseclog((LOG_DEBUG, "key_update: no SA index found.\n" )); |
| 5359 | return key_senderror(so, m, ENOENT); |
| 5360 | } |
| 5361 | |
| 5362 | /* set spidx if there */ |
| 5363 | /* XXX rewrite */ |
| 5364 | error = key_setident(sah, m, mhp); |
| 5365 | if (error) |
| 5366 | return key_senderror(so, m, error); |
| 5367 | |
| 5368 | /* find a SA with sequence number. */ |
| 5369 | #ifdef IPSEC_DOSEQCHECK |
| 5370 | if (mhp->msg->sadb_msg_seq != 0 |
| 5371 | && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { |
| 5372 | ipseclog((LOG_DEBUG, |
| 5373 | "key_update: no larval SA with sequence %u exists.\n" , |
| 5374 | mhp->msg->sadb_msg_seq)); |
| 5375 | return key_senderror(so, m, ENOENT); |
| 5376 | } |
| 5377 | #else |
| 5378 | if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { |
| 5379 | ipseclog((LOG_DEBUG, |
| 5380 | "key_update: no such a SA found (spi:%u)\n" , |
| 5381 | (u_int32_t)ntohl(sa0->sadb_sa_spi))); |
| 5382 | return key_senderror(so, m, EINVAL); |
| 5383 | } |
| 5384 | #endif |
| 5385 | |
| 5386 | /* validity check */ |
| 5387 | if (sav->sah->saidx.proto != proto) { |
| 5388 | ipseclog((LOG_DEBUG, |
| 5389 | "key_update: protocol mismatched (DB=%u param=%u)\n" , |
| 5390 | sav->sah->saidx.proto, proto)); |
| 5391 | return key_senderror(so, m, EINVAL); |
| 5392 | } |
| 5393 | #ifdef IPSEC_DOSEQCHECK |
| 5394 | if (sav->spi != sa0->sadb_sa_spi) { |
| 5395 | ipseclog((LOG_DEBUG, |
| 5396 | "key_update: SPI mismatched (DB:%u param:%u)\n" , |
| 5397 | (u_int32_t)ntohl(sav->spi), |
| 5398 | (u_int32_t)ntohl(sa0->sadb_sa_spi))); |
| 5399 | return key_senderror(so, m, EINVAL); |
| 5400 | } |
| 5401 | #endif |
| 5402 | if (sav->pid != mhp->msg->sadb_msg_pid) { |
| 5403 | ipseclog((LOG_DEBUG, |
| 5404 | "key_update: pid mismatched (DB:%u param:%u)\n" , |
| 5405 | sav->pid, mhp->msg->sadb_msg_pid)); |
| 5406 | return key_senderror(so, m, EINVAL); |
| 5407 | } |
| 5408 | |
| 5409 | /* copy sav values */ |
| 5410 | error = key_setsaval(sav, m, mhp); |
| 5411 | if (error) { |
| 5412 | KEY_FREESAV(&sav); |
| 5413 | return key_senderror(so, m, error); |
| 5414 | } |
| 5415 | |
| 5416 | if ((error = key_handle_natt_info(sav,mhp)) != 0) |
| 5417 | return key_senderror(so, m, EINVAL); |
| 5418 | |
| 5419 | /* check SA values to be mature. */ |
| 5420 | if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { |
| 5421 | KEY_FREESAV(&sav); |
| 5422 | return key_senderror(so, m, 0); |
| 5423 | } |
| 5424 | |
| 5425 | { |
| 5426 | struct mbuf *n; |
| 5427 | |
| 5428 | /* set msg buf from mhp */ |
| 5429 | n = key_getmsgbuf_x1(m, mhp); |
| 5430 | if (n == NULL) { |
| 5431 | ipseclog((LOG_DEBUG, "key_update: No more memory.\n" )); |
| 5432 | return key_senderror(so, m, ENOBUFS); |
| 5433 | } |
| 5434 | |
| 5435 | m_freem(m); |
| 5436 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 5437 | } |
| 5438 | } |
| 5439 | |
| 5440 | /* |
| 5441 | * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. |
| 5442 | * only called by key_update(). |
| 5443 | * OUT: |
| 5444 | * NULL : not found |
| 5445 | * others : found, pointer to a SA. |
| 5446 | */ |
| 5447 | #ifdef IPSEC_DOSEQCHECK |
| 5448 | static struct secasvar * |
| 5449 | key_getsavbyseq(struct secashead *sah, u_int32_t seq) |
| 5450 | { |
| 5451 | struct secasvar *sav; |
| 5452 | u_int state; |
| 5453 | |
| 5454 | state = SADB_SASTATE_LARVAL; |
| 5455 | |
| 5456 | /* search SAD with sequence number ? */ |
| 5457 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 5458 | |
| 5459 | KEY_CHKSASTATE(state, sav->state, "key_getsabyseq" ); |
| 5460 | |
| 5461 | if (sav->seq == seq) { |
| 5462 | SA_ADDREF(sav); |
| 5463 | KEYDEBUG(KEYDEBUG_IPSEC_STAMP, |
| 5464 | printf("DP %s cause refcnt++:%d SA:%p\n" , |
| 5465 | __func__, sav->refcnt, sav)); |
| 5466 | return sav; |
| 5467 | } |
| 5468 | } |
| 5469 | |
| 5470 | return NULL; |
| 5471 | } |
| 5472 | #endif |
| 5473 | |
| 5474 | /* |
| 5475 | * SADB_ADD processing |
| 5476 | * add an entry to SA database, when received |
| 5477 | * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) |
| 5478 | * key(AE), (identity(SD),) (sensitivity)> |
| 5479 | * from the ikmpd, |
| 5480 | * and send |
| 5481 | * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) |
| 5482 | * (identity(SD),) (sensitivity)> |
| 5483 | * to the ikmpd. |
| 5484 | * |
| 5485 | * IGNORE identity and sensitivity messages. |
| 5486 | * |
| 5487 | * m will always be freed. |
| 5488 | */ |
| 5489 | static int |
| 5490 | key_add(struct socket *so, struct mbuf *m, |
| 5491 | const struct sadb_msghdr *mhp) |
| 5492 | { |
| 5493 | struct sadb_sa *sa0; |
| 5494 | struct sadb_address *src0, *dst0; |
| 5495 | struct secasindex saidx; |
| 5496 | struct secashead *newsah; |
| 5497 | struct secasvar *newsav; |
| 5498 | u_int16_t proto; |
| 5499 | u_int8_t mode; |
| 5500 | u_int16_t reqid; |
| 5501 | int error; |
| 5502 | |
| 5503 | /* sanity check */ |
| 5504 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5505 | panic("key_add: NULL pointer is passed" ); |
| 5506 | |
| 5507 | /* map satype to proto */ |
| 5508 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 5509 | ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n" )); |
| 5510 | return key_senderror(so, m, EINVAL); |
| 5511 | } |
| 5512 | |
| 5513 | if (mhp->ext[SADB_EXT_SA] == NULL || |
| 5514 | mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 5515 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || |
| 5516 | (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && |
| 5517 | mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || |
| 5518 | (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && |
| 5519 | mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || |
| 5520 | (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && |
| 5521 | mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || |
| 5522 | (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && |
| 5523 | mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { |
| 5524 | ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n" )); |
| 5525 | return key_senderror(so, m, EINVAL); |
| 5526 | } |
| 5527 | if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || |
| 5528 | mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 5529 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { |
| 5530 | /* XXX need more */ |
| 5531 | ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n" )); |
| 5532 | return key_senderror(so, m, EINVAL); |
| 5533 | } |
| 5534 | if (mhp->ext[SADB_X_EXT_SA2] != NULL) { |
| 5535 | mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; |
| 5536 | reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; |
| 5537 | } else { |
| 5538 | mode = IPSEC_MODE_ANY; |
| 5539 | reqid = 0; |
| 5540 | } |
| 5541 | |
| 5542 | sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 5543 | src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; |
| 5544 | dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; |
| 5545 | |
| 5546 | if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, |
| 5547 | dst0 + 1, &saidx)) != 0) |
| 5548 | return key_senderror(so, m, EINVAL); |
| 5549 | |
| 5550 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 5551 | return key_senderror(so, m, EINVAL); |
| 5552 | |
| 5553 | /* get a SA header */ |
| 5554 | if ((newsah = key_getsah(&saidx)) == NULL) { |
| 5555 | /* create a new SA header */ |
| 5556 | if ((newsah = key_newsah(&saidx)) == NULL) { |
| 5557 | ipseclog((LOG_DEBUG, "key_add: No more memory.\n" )); |
| 5558 | return key_senderror(so, m, ENOBUFS); |
| 5559 | } |
| 5560 | } |
| 5561 | |
| 5562 | /* set spidx if there */ |
| 5563 | /* XXX rewrite */ |
| 5564 | error = key_setident(newsah, m, mhp); |
| 5565 | if (error) { |
| 5566 | return key_senderror(so, m, error); |
| 5567 | } |
| 5568 | |
| 5569 | /* create new SA entry. */ |
| 5570 | /* We can create new SA only if SPI is differenct. */ |
| 5571 | if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { |
| 5572 | ipseclog((LOG_DEBUG, "key_add: SA already exists.\n" )); |
| 5573 | return key_senderror(so, m, EEXIST); |
| 5574 | } |
| 5575 | newsav = KEY_NEWSAV(m, mhp, newsah, &error); |
| 5576 | if (newsav == NULL) { |
| 5577 | return key_senderror(so, m, error); |
| 5578 | } |
| 5579 | |
| 5580 | if ((error = key_handle_natt_info(newsav, mhp)) != 0) |
| 5581 | return key_senderror(so, m, EINVAL); |
| 5582 | |
| 5583 | /* check SA values to be mature. */ |
| 5584 | if ((error = key_mature(newsav)) != 0) { |
| 5585 | KEY_FREESAV(&newsav); |
| 5586 | return key_senderror(so, m, error); |
| 5587 | } |
| 5588 | |
| 5589 | /* |
| 5590 | * don't call key_freesav() here, as we would like to keep the SA |
| 5591 | * in the database on success. |
| 5592 | */ |
| 5593 | |
| 5594 | { |
| 5595 | struct mbuf *n; |
| 5596 | |
| 5597 | /* set msg buf from mhp */ |
| 5598 | n = key_getmsgbuf_x1(m, mhp); |
| 5599 | if (n == NULL) { |
| 5600 | ipseclog((LOG_DEBUG, "key_update: No more memory.\n" )); |
| 5601 | return key_senderror(so, m, ENOBUFS); |
| 5602 | } |
| 5603 | |
| 5604 | m_freem(m); |
| 5605 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 5606 | } |
| 5607 | } |
| 5608 | |
| 5609 | /* m is retained */ |
| 5610 | static int |
| 5611 | key_setident(struct secashead *sah, struct mbuf *m, |
| 5612 | const struct sadb_msghdr *mhp) |
| 5613 | { |
| 5614 | const struct sadb_ident *idsrc, *iddst; |
| 5615 | int idsrclen, iddstlen; |
| 5616 | |
| 5617 | /* sanity check */ |
| 5618 | if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5619 | panic("key_setident: NULL pointer is passed" ); |
| 5620 | |
| 5621 | /* don't make buffer if not there */ |
| 5622 | if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && |
| 5623 | mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { |
| 5624 | sah->idents = NULL; |
| 5625 | sah->identd = NULL; |
| 5626 | return 0; |
| 5627 | } |
| 5628 | |
| 5629 | if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || |
| 5630 | mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { |
| 5631 | ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n" )); |
| 5632 | return EINVAL; |
| 5633 | } |
| 5634 | |
| 5635 | idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; |
| 5636 | iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; |
| 5637 | idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; |
| 5638 | iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; |
| 5639 | |
| 5640 | /* validity check */ |
| 5641 | if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { |
| 5642 | ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n" )); |
| 5643 | return EINVAL; |
| 5644 | } |
| 5645 | |
| 5646 | switch (idsrc->sadb_ident_type) { |
| 5647 | case SADB_IDENTTYPE_PREFIX: |
| 5648 | case SADB_IDENTTYPE_FQDN: |
| 5649 | case SADB_IDENTTYPE_USERFQDN: |
| 5650 | default: |
| 5651 | /* XXX do nothing */ |
| 5652 | sah->idents = NULL; |
| 5653 | sah->identd = NULL; |
| 5654 | return 0; |
| 5655 | } |
| 5656 | |
| 5657 | /* make structure */ |
| 5658 | KMALLOC(sah->idents, struct sadb_ident *, idsrclen); |
| 5659 | if (sah->idents == NULL) { |
| 5660 | ipseclog((LOG_DEBUG, "key_setident: No more memory.\n" )); |
| 5661 | return ENOBUFS; |
| 5662 | } |
| 5663 | KMALLOC(sah->identd, struct sadb_ident *, iddstlen); |
| 5664 | if (sah->identd == NULL) { |
| 5665 | KFREE(sah->idents); |
| 5666 | sah->idents = NULL; |
| 5667 | ipseclog((LOG_DEBUG, "key_setident: No more memory.\n" )); |
| 5668 | return ENOBUFS; |
| 5669 | } |
| 5670 | memcpy(sah->idents, idsrc, idsrclen); |
| 5671 | memcpy(sah->identd, iddst, iddstlen); |
| 5672 | |
| 5673 | return 0; |
| 5674 | } |
| 5675 | |
| 5676 | /* |
| 5677 | * m will not be freed on return. |
| 5678 | * it is caller's responsibility to free the result. |
| 5679 | */ |
| 5680 | static struct mbuf * |
| 5681 | key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) |
| 5682 | { |
| 5683 | struct mbuf *n; |
| 5684 | |
| 5685 | /* sanity check */ |
| 5686 | if (m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5687 | panic("key_getmsgbuf_x1: NULL pointer is passed" ); |
| 5688 | |
| 5689 | /* create new sadb_msg to reply. */ |
| 5690 | n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, |
| 5691 | SADB_EXT_SA, SADB_X_EXT_SA2, |
| 5692 | SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, |
| 5693 | SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, |
| 5694 | SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, |
| 5695 | SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, |
| 5696 | SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, |
| 5697 | SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); |
| 5698 | if (!n) |
| 5699 | return NULL; |
| 5700 | |
| 5701 | if (n->m_len < sizeof(struct sadb_msg)) { |
| 5702 | n = m_pullup(n, sizeof(struct sadb_msg)); |
| 5703 | if (n == NULL) |
| 5704 | return NULL; |
| 5705 | } |
| 5706 | mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; |
| 5707 | mtod(n, struct sadb_msg *)->sadb_msg_len = |
| 5708 | PFKEY_UNIT64(n->m_pkthdr.len); |
| 5709 | |
| 5710 | return n; |
| 5711 | } |
| 5712 | |
| 5713 | static int key_delete_all (struct socket *, struct mbuf *, |
| 5714 | const struct sadb_msghdr *, u_int16_t); |
| 5715 | |
| 5716 | /* |
| 5717 | * SADB_DELETE processing |
| 5718 | * receive |
| 5719 | * <base, SA(*), address(SD)> |
| 5720 | * from the ikmpd, and set SADB_SASTATE_DEAD, |
| 5721 | * and send, |
| 5722 | * <base, SA(*), address(SD)> |
| 5723 | * to the ikmpd. |
| 5724 | * |
| 5725 | * m will always be freed. |
| 5726 | */ |
| 5727 | static int |
| 5728 | key_delete(struct socket *so, struct mbuf *m, |
| 5729 | const struct sadb_msghdr *mhp) |
| 5730 | { |
| 5731 | struct sadb_sa *sa0; |
| 5732 | struct sadb_address *src0, *dst0; |
| 5733 | struct secasindex saidx; |
| 5734 | struct secashead *sah; |
| 5735 | struct secasvar *sav = NULL; |
| 5736 | u_int16_t proto; |
| 5737 | int error; |
| 5738 | |
| 5739 | /* sanity check */ |
| 5740 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5741 | panic("key_delete: NULL pointer is passed" ); |
| 5742 | |
| 5743 | /* map satype to proto */ |
| 5744 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 5745 | ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n" )); |
| 5746 | return key_senderror(so, m, EINVAL); |
| 5747 | } |
| 5748 | |
| 5749 | if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 5750 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { |
| 5751 | ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n" )); |
| 5752 | return key_senderror(so, m, EINVAL); |
| 5753 | } |
| 5754 | |
| 5755 | if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 5756 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { |
| 5757 | ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n" )); |
| 5758 | return key_senderror(so, m, EINVAL); |
| 5759 | } |
| 5760 | |
| 5761 | if (mhp->ext[SADB_EXT_SA] == NULL) { |
| 5762 | /* |
| 5763 | * Caller wants us to delete all non-LARVAL SAs |
| 5764 | * that match the src/dst. This is used during |
| 5765 | * IKE INITIAL-CONTACT. |
| 5766 | */ |
| 5767 | ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n" )); |
| 5768 | return key_delete_all(so, m, mhp, proto); |
| 5769 | } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { |
| 5770 | ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n" )); |
| 5771 | return key_senderror(so, m, EINVAL); |
| 5772 | } |
| 5773 | |
| 5774 | sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 5775 | src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); |
| 5776 | dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); |
| 5777 | |
| 5778 | if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, |
| 5779 | dst0 + 1, &saidx)) != 0) |
| 5780 | return key_senderror(so, m, EINVAL); |
| 5781 | |
| 5782 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 5783 | return key_senderror(so, m, EINVAL); |
| 5784 | |
| 5785 | /* get a SA header */ |
| 5786 | LIST_FOREACH(sah, &sahtree, chain) { |
| 5787 | if (sah->state == SADB_SASTATE_DEAD) |
| 5788 | continue; |
| 5789 | if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) |
| 5790 | continue; |
| 5791 | |
| 5792 | /* get a SA with SPI. */ |
| 5793 | sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); |
| 5794 | if (sav) |
| 5795 | break; |
| 5796 | } |
| 5797 | if (sah == NULL) { |
| 5798 | ipseclog((LOG_DEBUG, "key_delete: no SA found.\n" )); |
| 5799 | return key_senderror(so, m, ENOENT); |
| 5800 | } |
| 5801 | |
| 5802 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 5803 | KEY_FREESAV(&sav); |
| 5804 | |
| 5805 | { |
| 5806 | struct mbuf *n; |
| 5807 | struct sadb_msg *newmsg; |
| 5808 | |
| 5809 | /* create new sadb_msg to reply. */ |
| 5810 | n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, |
| 5811 | SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); |
| 5812 | if (!n) |
| 5813 | return key_senderror(so, m, ENOBUFS); |
| 5814 | |
| 5815 | if (n->m_len < sizeof(struct sadb_msg)) { |
| 5816 | n = m_pullup(n, sizeof(struct sadb_msg)); |
| 5817 | if (n == NULL) |
| 5818 | return key_senderror(so, m, ENOBUFS); |
| 5819 | } |
| 5820 | newmsg = mtod(n, struct sadb_msg *); |
| 5821 | newmsg->sadb_msg_errno = 0; |
| 5822 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 5823 | |
| 5824 | m_freem(m); |
| 5825 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 5826 | } |
| 5827 | } |
| 5828 | |
| 5829 | /* |
| 5830 | * delete all SAs for src/dst. Called from key_delete(). |
| 5831 | */ |
| 5832 | static int |
| 5833 | key_delete_all(struct socket *so, struct mbuf *m, |
| 5834 | const struct sadb_msghdr *mhp, u_int16_t proto) |
| 5835 | { |
| 5836 | struct sadb_address *src0, *dst0; |
| 5837 | struct secasindex saidx; |
| 5838 | struct secashead *sah; |
| 5839 | struct secasvar *sav, *nextsav; |
| 5840 | u_int stateidx, state; |
| 5841 | int error; |
| 5842 | |
| 5843 | src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); |
| 5844 | dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); |
| 5845 | |
| 5846 | if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, |
| 5847 | dst0 + 1, &saidx)) != 0) |
| 5848 | return key_senderror(so, m, EINVAL); |
| 5849 | |
| 5850 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 5851 | return key_senderror(so, m, EINVAL); |
| 5852 | |
| 5853 | LIST_FOREACH(sah, &sahtree, chain) { |
| 5854 | if (sah->state == SADB_SASTATE_DEAD) |
| 5855 | continue; |
| 5856 | if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) |
| 5857 | continue; |
| 5858 | |
| 5859 | /* Delete all non-LARVAL SAs. */ |
| 5860 | for (stateidx = 0; |
| 5861 | stateidx < _ARRAYLEN(saorder_state_alive); |
| 5862 | stateidx++) { |
| 5863 | state = saorder_state_alive[stateidx]; |
| 5864 | if (state == SADB_SASTATE_LARVAL) |
| 5865 | continue; |
| 5866 | for (sav = LIST_FIRST(&sah->savtree[state]); |
| 5867 | sav != NULL; sav = nextsav) { |
| 5868 | nextsav = LIST_NEXT(sav, chain); |
| 5869 | /* sanity check */ |
| 5870 | if (sav->state != state) { |
| 5871 | ipseclog((LOG_DEBUG, "key_delete_all: " |
| 5872 | "invalid sav->state " |
| 5873 | "(queue: %d SA: %d)\n" , |
| 5874 | state, sav->state)); |
| 5875 | continue; |
| 5876 | } |
| 5877 | |
| 5878 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 5879 | KEY_FREESAV(&sav); |
| 5880 | } |
| 5881 | } |
| 5882 | } |
| 5883 | { |
| 5884 | struct mbuf *n; |
| 5885 | struct sadb_msg *newmsg; |
| 5886 | |
| 5887 | /* create new sadb_msg to reply. */ |
| 5888 | n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, |
| 5889 | SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); |
| 5890 | if (!n) |
| 5891 | return key_senderror(so, m, ENOBUFS); |
| 5892 | |
| 5893 | if (n->m_len < sizeof(struct sadb_msg)) { |
| 5894 | n = m_pullup(n, sizeof(struct sadb_msg)); |
| 5895 | if (n == NULL) |
| 5896 | return key_senderror(so, m, ENOBUFS); |
| 5897 | } |
| 5898 | newmsg = mtod(n, struct sadb_msg *); |
| 5899 | newmsg->sadb_msg_errno = 0; |
| 5900 | newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); |
| 5901 | |
| 5902 | m_freem(m); |
| 5903 | return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); |
| 5904 | } |
| 5905 | } |
| 5906 | |
| 5907 | /* |
| 5908 | * SADB_GET processing |
| 5909 | * receive |
| 5910 | * <base, SA(*), address(SD)> |
| 5911 | * from the ikmpd, and get a SP and a SA to respond, |
| 5912 | * and send, |
| 5913 | * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), |
| 5914 | * (identity(SD),) (sensitivity)> |
| 5915 | * to the ikmpd. |
| 5916 | * |
| 5917 | * m will always be freed. |
| 5918 | */ |
| 5919 | static int |
| 5920 | key_get(struct socket *so, struct mbuf *m, |
| 5921 | const struct sadb_msghdr *mhp) |
| 5922 | { |
| 5923 | struct sadb_sa *sa0; |
| 5924 | struct sadb_address *src0, *dst0; |
| 5925 | struct secasindex saidx; |
| 5926 | struct secashead *sah; |
| 5927 | struct secasvar *sav = NULL; |
| 5928 | u_int16_t proto; |
| 5929 | int error; |
| 5930 | |
| 5931 | /* sanity check */ |
| 5932 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 5933 | panic("key_get: NULL pointer is passed" ); |
| 5934 | |
| 5935 | /* map satype to proto */ |
| 5936 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 5937 | ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n" )); |
| 5938 | return key_senderror(so, m, EINVAL); |
| 5939 | } |
| 5940 | |
| 5941 | if (mhp->ext[SADB_EXT_SA] == NULL || |
| 5942 | mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 5943 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { |
| 5944 | ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n" )); |
| 5945 | return key_senderror(so, m, EINVAL); |
| 5946 | } |
| 5947 | if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || |
| 5948 | mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 5949 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { |
| 5950 | ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n" )); |
| 5951 | return key_senderror(so, m, EINVAL); |
| 5952 | } |
| 5953 | |
| 5954 | sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; |
| 5955 | src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; |
| 5956 | dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; |
| 5957 | |
| 5958 | if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, |
| 5959 | dst0 + 1, &saidx)) != 0) |
| 5960 | return key_senderror(so, m, EINVAL); |
| 5961 | |
| 5962 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 5963 | return key_senderror(so, m, EINVAL); |
| 5964 | |
| 5965 | /* get a SA header */ |
| 5966 | LIST_FOREACH(sah, &sahtree, chain) { |
| 5967 | if (sah->state == SADB_SASTATE_DEAD) |
| 5968 | continue; |
| 5969 | if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) |
| 5970 | continue; |
| 5971 | |
| 5972 | /* get a SA with SPI. */ |
| 5973 | sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); |
| 5974 | if (sav) |
| 5975 | break; |
| 5976 | } |
| 5977 | if (sah == NULL) { |
| 5978 | ipseclog((LOG_DEBUG, "key_get: no SA found.\n" )); |
| 5979 | return key_senderror(so, m, ENOENT); |
| 5980 | } |
| 5981 | |
| 5982 | { |
| 5983 | struct mbuf *n; |
| 5984 | u_int8_t satype; |
| 5985 | |
| 5986 | /* map proto to satype */ |
| 5987 | if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { |
| 5988 | ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n" )); |
| 5989 | return key_senderror(so, m, EINVAL); |
| 5990 | } |
| 5991 | |
| 5992 | /* create new sadb_msg to reply. */ |
| 5993 | n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, |
| 5994 | mhp->msg->sadb_msg_pid); |
| 5995 | if (!n) |
| 5996 | return key_senderror(so, m, ENOBUFS); |
| 5997 | |
| 5998 | m_freem(m); |
| 5999 | return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); |
| 6000 | } |
| 6001 | } |
| 6002 | |
| 6003 | /* XXX make it sysctl-configurable? */ |
| 6004 | static void |
| 6005 | key_getcomb_setlifetime(struct sadb_comb *comb) |
| 6006 | { |
| 6007 | |
| 6008 | comb->sadb_comb_soft_allocations = 1; |
| 6009 | comb->sadb_comb_hard_allocations = 1; |
| 6010 | comb->sadb_comb_soft_bytes = 0; |
| 6011 | comb->sadb_comb_hard_bytes = 0; |
| 6012 | comb->sadb_comb_hard_addtime = 86400; /* 1 day */ |
| 6013 | comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; |
| 6014 | comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ |
| 6015 | comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; |
| 6016 | } |
| 6017 | |
| 6018 | /* |
| 6019 | * XXX reorder combinations by preference |
| 6020 | * XXX no idea if the user wants ESP authentication or not |
| 6021 | */ |
| 6022 | static struct mbuf * |
| 6023 | key_getcomb_esp(void) |
| 6024 | { |
| 6025 | struct sadb_comb *comb; |
| 6026 | const struct enc_xform *algo; |
| 6027 | struct mbuf *result = NULL, *m, *n; |
| 6028 | int encmin; |
| 6029 | int i, off, o; |
| 6030 | int totlen; |
| 6031 | const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); |
| 6032 | |
| 6033 | m = NULL; |
| 6034 | for (i = 1; i <= SADB_EALG_MAX; i++) { |
| 6035 | algo = esp_algorithm_lookup(i); |
| 6036 | if (algo == NULL) |
| 6037 | continue; |
| 6038 | |
| 6039 | /* discard algorithms with key size smaller than system min */ |
| 6040 | if (_BITS(algo->maxkey) < ipsec_esp_keymin) |
| 6041 | continue; |
| 6042 | if (_BITS(algo->minkey) < ipsec_esp_keymin) |
| 6043 | encmin = ipsec_esp_keymin; |
| 6044 | else |
| 6045 | encmin = _BITS(algo->minkey); |
| 6046 | |
| 6047 | if (ipsec_esp_auth) |
| 6048 | m = key_getcomb_ah(); |
| 6049 | else { |
| 6050 | IPSEC_ASSERT(l <= MLEN, |
| 6051 | ("key_getcomb_esp: l=%u > MLEN=%lu" , |
| 6052 | l, (u_long) MLEN)); |
| 6053 | MGET(m, M_DONTWAIT, MT_DATA); |
| 6054 | if (m) { |
| 6055 | M_ALIGN(m, l); |
| 6056 | m->m_len = l; |
| 6057 | m->m_next = NULL; |
| 6058 | memset(mtod(m, void *), 0, m->m_len); |
| 6059 | } |
| 6060 | } |
| 6061 | if (!m) |
| 6062 | goto fail; |
| 6063 | |
| 6064 | totlen = 0; |
| 6065 | for (n = m; n; n = n->m_next) |
| 6066 | totlen += n->m_len; |
| 6067 | IPSEC_ASSERT((totlen % l) == 0, |
| 6068 | ("key_getcomb_esp: totlen=%u, l=%u" , totlen, l)); |
| 6069 | |
| 6070 | for (off = 0; off < totlen; off += l) { |
| 6071 | n = m_pulldown(m, off, l, &o); |
| 6072 | if (!n) { |
| 6073 | /* m is already freed */ |
| 6074 | goto fail; |
| 6075 | } |
| 6076 | comb = (struct sadb_comb *)(mtod(n, char *) + o); |
| 6077 | memset(comb, 0, sizeof(*comb)); |
| 6078 | key_getcomb_setlifetime(comb); |
| 6079 | comb->sadb_comb_encrypt = i; |
| 6080 | comb->sadb_comb_encrypt_minbits = encmin; |
| 6081 | comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); |
| 6082 | } |
| 6083 | |
| 6084 | if (!result) |
| 6085 | result = m; |
| 6086 | else |
| 6087 | m_cat(result, m); |
| 6088 | } |
| 6089 | |
| 6090 | return result; |
| 6091 | |
| 6092 | fail: |
| 6093 | if (result) |
| 6094 | m_freem(result); |
| 6095 | return NULL; |
| 6096 | } |
| 6097 | |
| 6098 | static void |
| 6099 | key_getsizes_ah(const struct auth_hash *ah, int alg, |
| 6100 | u_int16_t* ksmin, u_int16_t* ksmax) |
| 6101 | { |
| 6102 | *ksmin = *ksmax = ah->keysize; |
| 6103 | if (ah->keysize == 0) { |
| 6104 | /* |
| 6105 | * Transform takes arbitrary key size but algorithm |
| 6106 | * key size is restricted. Enforce this here. |
| 6107 | */ |
| 6108 | switch (alg) { |
| 6109 | case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; |
| 6110 | case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; |
| 6111 | case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; |
| 6112 | default: |
| 6113 | DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n" , |
| 6114 | alg)); |
| 6115 | break; |
| 6116 | } |
| 6117 | } |
| 6118 | } |
| 6119 | |
| 6120 | /* |
| 6121 | * XXX reorder combinations by preference |
| 6122 | */ |
| 6123 | static struct mbuf * |
| 6124 | key_getcomb_ah(void) |
| 6125 | { |
| 6126 | struct sadb_comb *comb; |
| 6127 | const struct auth_hash *algo; |
| 6128 | struct mbuf *m; |
| 6129 | u_int16_t minkeysize, maxkeysize; |
| 6130 | int i; |
| 6131 | const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); |
| 6132 | |
| 6133 | m = NULL; |
| 6134 | for (i = 1; i <= SADB_AALG_MAX; i++) { |
| 6135 | #if 1 |
| 6136 | /* we prefer HMAC algorithms, not old algorithms */ |
| 6137 | if (i != SADB_AALG_SHA1HMAC && |
| 6138 | i != SADB_AALG_MD5HMAC && |
| 6139 | i != SADB_X_AALG_SHA2_256 && |
| 6140 | i != SADB_X_AALG_SHA2_384 && |
| 6141 | i != SADB_X_AALG_SHA2_512) |
| 6142 | continue; |
| 6143 | #endif |
| 6144 | algo = ah_algorithm_lookup(i); |
| 6145 | if (!algo) |
| 6146 | continue; |
| 6147 | key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); |
| 6148 | /* discard algorithms with key size smaller than system min */ |
| 6149 | if (_BITS(minkeysize) < ipsec_ah_keymin) |
| 6150 | continue; |
| 6151 | |
| 6152 | if (!m) { |
| 6153 | IPSEC_ASSERT(l <= MLEN, |
| 6154 | ("key_getcomb_ah: l=%u > MLEN=%lu" , |
| 6155 | l, (u_long) MLEN)); |
| 6156 | MGET(m, M_DONTWAIT, MT_DATA); |
| 6157 | if (m) { |
| 6158 | M_ALIGN(m, l); |
| 6159 | m->m_len = l; |
| 6160 | m->m_next = NULL; |
| 6161 | } |
| 6162 | } else |
| 6163 | M_PREPEND(m, l, M_DONTWAIT); |
| 6164 | if (!m) |
| 6165 | return NULL; |
| 6166 | |
| 6167 | comb = mtod(m, struct sadb_comb *); |
| 6168 | memset(comb, 0, sizeof(*comb)); |
| 6169 | key_getcomb_setlifetime(comb); |
| 6170 | comb->sadb_comb_auth = i; |
| 6171 | comb->sadb_comb_auth_minbits = _BITS(minkeysize); |
| 6172 | comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); |
| 6173 | } |
| 6174 | |
| 6175 | return m; |
| 6176 | } |
| 6177 | |
| 6178 | /* |
| 6179 | * not really an official behavior. discussed in pf_key@inner.net in Sep2000. |
| 6180 | * XXX reorder combinations by preference |
| 6181 | */ |
| 6182 | static struct mbuf * |
| 6183 | key_getcomb_ipcomp(void) |
| 6184 | { |
| 6185 | struct sadb_comb *comb; |
| 6186 | const struct comp_algo *algo; |
| 6187 | struct mbuf *m; |
| 6188 | int i; |
| 6189 | const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); |
| 6190 | |
| 6191 | m = NULL; |
| 6192 | for (i = 1; i <= SADB_X_CALG_MAX; i++) { |
| 6193 | algo = ipcomp_algorithm_lookup(i); |
| 6194 | if (!algo) |
| 6195 | continue; |
| 6196 | |
| 6197 | if (!m) { |
| 6198 | IPSEC_ASSERT(l <= MLEN, |
| 6199 | ("key_getcomb_ipcomp: l=%u > MLEN=%lu" , |
| 6200 | l, (u_long) MLEN)); |
| 6201 | MGET(m, M_DONTWAIT, MT_DATA); |
| 6202 | if (m) { |
| 6203 | M_ALIGN(m, l); |
| 6204 | m->m_len = l; |
| 6205 | m->m_next = NULL; |
| 6206 | } |
| 6207 | } else |
| 6208 | M_PREPEND(m, l, M_DONTWAIT); |
| 6209 | if (!m) |
| 6210 | return NULL; |
| 6211 | |
| 6212 | comb = mtod(m, struct sadb_comb *); |
| 6213 | memset(comb, 0, sizeof(*comb)); |
| 6214 | key_getcomb_setlifetime(comb); |
| 6215 | comb->sadb_comb_encrypt = i; |
| 6216 | /* what should we set into sadb_comb_*_{min,max}bits? */ |
| 6217 | } |
| 6218 | |
| 6219 | return m; |
| 6220 | } |
| 6221 | |
| 6222 | /* |
| 6223 | * XXX no way to pass mode (transport/tunnel) to userland |
| 6224 | * XXX replay checking? |
| 6225 | * XXX sysctl interface to ipsec_{ah,esp}_keymin |
| 6226 | */ |
| 6227 | static struct mbuf * |
| 6228 | key_getprop(const struct secasindex *saidx) |
| 6229 | { |
| 6230 | struct sadb_prop *prop; |
| 6231 | struct mbuf *m, *n; |
| 6232 | const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); |
| 6233 | int totlen; |
| 6234 | |
| 6235 | switch (saidx->proto) { |
| 6236 | case IPPROTO_ESP: |
| 6237 | m = key_getcomb_esp(); |
| 6238 | break; |
| 6239 | case IPPROTO_AH: |
| 6240 | m = key_getcomb_ah(); |
| 6241 | break; |
| 6242 | case IPPROTO_IPCOMP: |
| 6243 | m = key_getcomb_ipcomp(); |
| 6244 | break; |
| 6245 | default: |
| 6246 | return NULL; |
| 6247 | } |
| 6248 | |
| 6249 | if (!m) |
| 6250 | return NULL; |
| 6251 | M_PREPEND(m, l, M_DONTWAIT); |
| 6252 | if (!m) |
| 6253 | return NULL; |
| 6254 | |
| 6255 | totlen = 0; |
| 6256 | for (n = m; n; n = n->m_next) |
| 6257 | totlen += n->m_len; |
| 6258 | |
| 6259 | prop = mtod(m, struct sadb_prop *); |
| 6260 | memset(prop, 0, sizeof(*prop)); |
| 6261 | prop->sadb_prop_len = PFKEY_UNIT64(totlen); |
| 6262 | prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; |
| 6263 | prop->sadb_prop_replay = 32; /* XXX */ |
| 6264 | |
| 6265 | return m; |
| 6266 | } |
| 6267 | |
| 6268 | /* |
| 6269 | * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). |
| 6270 | * send |
| 6271 | * <base, SA, address(SD), (address(P)), x_policy, |
| 6272 | * (identity(SD),) (sensitivity,) proposal> |
| 6273 | * to KMD, and expect to receive |
| 6274 | * <base> with SADB_ACQUIRE if error occurred, |
| 6275 | * or |
| 6276 | * <base, src address, dst address, (SPI range)> with SADB_GETSPI |
| 6277 | * from KMD by PF_KEY. |
| 6278 | * |
| 6279 | * XXX x_policy is outside of RFC2367 (KAME extension). |
| 6280 | * XXX sensitivity is not supported. |
| 6281 | * XXX for ipcomp, RFC2367 does not define how to fill in proposal. |
| 6282 | * see comment for key_getcomb_ipcomp(). |
| 6283 | * |
| 6284 | * OUT: |
| 6285 | * 0 : succeed |
| 6286 | * others: error number |
| 6287 | */ |
| 6288 | static int |
| 6289 | key_acquire(const struct secasindex *saidx, struct secpolicy *sp) |
| 6290 | { |
| 6291 | struct mbuf *result = NULL, *m; |
| 6292 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 6293 | struct secacq *newacq; |
| 6294 | #endif |
| 6295 | u_int8_t satype; |
| 6296 | int error = -1; |
| 6297 | u_int32_t seq; |
| 6298 | |
| 6299 | /* sanity check */ |
| 6300 | IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx" )); |
| 6301 | satype = key_proto2satype(saidx->proto); |
| 6302 | IPSEC_ASSERT(satype != 0, |
| 6303 | ("key_acquire: null satype, protocol %u" , saidx->proto)); |
| 6304 | |
| 6305 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 6306 | /* |
| 6307 | * We never do anything about acquirng SA. There is anather |
| 6308 | * solution that kernel blocks to send SADB_ACQUIRE message until |
| 6309 | * getting something message from IKEd. In later case, to be |
| 6310 | * managed with ACQUIRING list. |
| 6311 | */ |
| 6312 | /* Get an entry to check whether sending message or not. */ |
| 6313 | if ((newacq = key_getacq(saidx)) != NULL) { |
| 6314 | if (key_blockacq_count < newacq->count) { |
| 6315 | /* reset counter and do send message. */ |
| 6316 | newacq->count = 0; |
| 6317 | } else { |
| 6318 | /* increment counter and do nothing. */ |
| 6319 | newacq->count++; |
| 6320 | return 0; |
| 6321 | } |
| 6322 | } else { |
| 6323 | /* make new entry for blocking to send SADB_ACQUIRE. */ |
| 6324 | if ((newacq = key_newacq(saidx)) == NULL) |
| 6325 | return ENOBUFS; |
| 6326 | |
| 6327 | /* add to acqtree */ |
| 6328 | LIST_INSERT_HEAD(&acqtree, newacq, chain); |
| 6329 | } |
| 6330 | #endif |
| 6331 | |
| 6332 | |
| 6333 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 6334 | seq = newacq->seq; |
| 6335 | #else |
| 6336 | seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); |
| 6337 | #endif |
| 6338 | m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); |
| 6339 | if (!m) { |
| 6340 | error = ENOBUFS; |
| 6341 | goto fail; |
| 6342 | } |
| 6343 | result = m; |
| 6344 | |
| 6345 | /* set sadb_address for saidx's. */ |
| 6346 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 6347 | &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); |
| 6348 | if (!m) { |
| 6349 | error = ENOBUFS; |
| 6350 | goto fail; |
| 6351 | } |
| 6352 | m_cat(result, m); |
| 6353 | |
| 6354 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 6355 | &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); |
| 6356 | if (!m) { |
| 6357 | error = ENOBUFS; |
| 6358 | goto fail; |
| 6359 | } |
| 6360 | m_cat(result, m); |
| 6361 | |
| 6362 | /* XXX proxy address (optional) */ |
| 6363 | |
| 6364 | /* set sadb_x_policy */ |
| 6365 | if (sp) { |
| 6366 | m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); |
| 6367 | if (!m) { |
| 6368 | error = ENOBUFS; |
| 6369 | goto fail; |
| 6370 | } |
| 6371 | m_cat(result, m); |
| 6372 | } |
| 6373 | |
| 6374 | /* XXX identity (optional) */ |
| 6375 | #if 0 |
| 6376 | if (idexttype && fqdn) { |
| 6377 | /* create identity extension (FQDN) */ |
| 6378 | struct sadb_ident *id; |
| 6379 | int fqdnlen; |
| 6380 | |
| 6381 | fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ |
| 6382 | id = (struct sadb_ident *)p; |
| 6383 | memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); |
| 6384 | id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); |
| 6385 | id->sadb_ident_exttype = idexttype; |
| 6386 | id->sadb_ident_type = SADB_IDENTTYPE_FQDN; |
| 6387 | memcpy(id + 1, fqdn, fqdnlen); |
| 6388 | p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); |
| 6389 | } |
| 6390 | |
| 6391 | if (idexttype) { |
| 6392 | /* create identity extension (USERFQDN) */ |
| 6393 | struct sadb_ident *id; |
| 6394 | int userfqdnlen; |
| 6395 | |
| 6396 | if (userfqdn) { |
| 6397 | /* +1 for terminating-NUL */ |
| 6398 | userfqdnlen = strlen(userfqdn) + 1; |
| 6399 | } else |
| 6400 | userfqdnlen = 0; |
| 6401 | id = (struct sadb_ident *)p; |
| 6402 | memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); |
| 6403 | id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); |
| 6404 | id->sadb_ident_exttype = idexttype; |
| 6405 | id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; |
| 6406 | /* XXX is it correct? */ |
| 6407 | if (curlwp) |
| 6408 | id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); |
| 6409 | if (userfqdn && userfqdnlen) |
| 6410 | memcpy(id + 1, userfqdn, userfqdnlen); |
| 6411 | p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); |
| 6412 | } |
| 6413 | #endif |
| 6414 | |
| 6415 | /* XXX sensitivity (optional) */ |
| 6416 | |
| 6417 | /* create proposal/combination extension */ |
| 6418 | m = key_getprop(saidx); |
| 6419 | #if 0 |
| 6420 | /* |
| 6421 | * spec conformant: always attach proposal/combination extension, |
| 6422 | * the problem is that we have no way to attach it for ipcomp, |
| 6423 | * due to the way sadb_comb is declared in RFC2367. |
| 6424 | */ |
| 6425 | if (!m) { |
| 6426 | error = ENOBUFS; |
| 6427 | goto fail; |
| 6428 | } |
| 6429 | m_cat(result, m); |
| 6430 | #else |
| 6431 | /* |
| 6432 | * outside of spec; make proposal/combination extension optional. |
| 6433 | */ |
| 6434 | if (m) |
| 6435 | m_cat(result, m); |
| 6436 | #endif |
| 6437 | |
| 6438 | if ((result->m_flags & M_PKTHDR) == 0) { |
| 6439 | error = EINVAL; |
| 6440 | goto fail; |
| 6441 | } |
| 6442 | |
| 6443 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 6444 | result = m_pullup(result, sizeof(struct sadb_msg)); |
| 6445 | if (result == NULL) { |
| 6446 | error = ENOBUFS; |
| 6447 | goto fail; |
| 6448 | } |
| 6449 | } |
| 6450 | |
| 6451 | result->m_pkthdr.len = 0; |
| 6452 | for (m = result; m; m = m->m_next) |
| 6453 | result->m_pkthdr.len += m->m_len; |
| 6454 | |
| 6455 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 6456 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 6457 | |
| 6458 | return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); |
| 6459 | |
| 6460 | fail: |
| 6461 | if (result) |
| 6462 | m_freem(result); |
| 6463 | return error; |
| 6464 | } |
| 6465 | |
| 6466 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 6467 | static struct secacq * |
| 6468 | key_newacq(const struct secasindex *saidx) |
| 6469 | { |
| 6470 | struct secacq *newacq; |
| 6471 | |
| 6472 | /* get new entry */ |
| 6473 | KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); |
| 6474 | if (newacq == NULL) { |
| 6475 | ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n" )); |
| 6476 | return NULL; |
| 6477 | } |
| 6478 | memset(newacq, 0, sizeof(*newacq)); |
| 6479 | |
| 6480 | /* copy secindex */ |
| 6481 | memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); |
| 6482 | newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); |
| 6483 | newacq->created = time_uptime; |
| 6484 | newacq->count = 0; |
| 6485 | |
| 6486 | return newacq; |
| 6487 | } |
| 6488 | |
| 6489 | static struct secacq * |
| 6490 | key_getacq(const struct secasindex *saidx) |
| 6491 | { |
| 6492 | struct secacq *acq; |
| 6493 | |
| 6494 | LIST_FOREACH(acq, &acqtree, chain) { |
| 6495 | if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) |
| 6496 | return acq; |
| 6497 | } |
| 6498 | |
| 6499 | return NULL; |
| 6500 | } |
| 6501 | |
| 6502 | static struct secacq * |
| 6503 | key_getacqbyseq(u_int32_t seq) |
| 6504 | { |
| 6505 | struct secacq *acq; |
| 6506 | |
| 6507 | LIST_FOREACH(acq, &acqtree, chain) { |
| 6508 | if (acq->seq == seq) |
| 6509 | return acq; |
| 6510 | } |
| 6511 | |
| 6512 | return NULL; |
| 6513 | } |
| 6514 | #endif |
| 6515 | |
| 6516 | static struct secspacq * |
| 6517 | key_newspacq(const struct secpolicyindex *spidx) |
| 6518 | { |
| 6519 | struct secspacq *acq; |
| 6520 | |
| 6521 | /* get new entry */ |
| 6522 | KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); |
| 6523 | if (acq == NULL) { |
| 6524 | ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n" )); |
| 6525 | return NULL; |
| 6526 | } |
| 6527 | memset(acq, 0, sizeof(*acq)); |
| 6528 | |
| 6529 | /* copy secindex */ |
| 6530 | memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); |
| 6531 | acq->created = time_uptime; |
| 6532 | acq->count = 0; |
| 6533 | |
| 6534 | return acq; |
| 6535 | } |
| 6536 | |
| 6537 | static struct secspacq * |
| 6538 | key_getspacq(const struct secpolicyindex *spidx) |
| 6539 | { |
| 6540 | struct secspacq *acq; |
| 6541 | |
| 6542 | LIST_FOREACH(acq, &spacqtree, chain) { |
| 6543 | if (key_cmpspidx_exactly(spidx, &acq->spidx)) |
| 6544 | return acq; |
| 6545 | } |
| 6546 | |
| 6547 | return NULL; |
| 6548 | } |
| 6549 | |
| 6550 | /* |
| 6551 | * SADB_ACQUIRE processing, |
| 6552 | * in first situation, is receiving |
| 6553 | * <base> |
| 6554 | * from the ikmpd, and clear sequence of its secasvar entry. |
| 6555 | * |
| 6556 | * In second situation, is receiving |
| 6557 | * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> |
| 6558 | * from a user land process, and return |
| 6559 | * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> |
| 6560 | * to the socket. |
| 6561 | * |
| 6562 | * m will always be freed. |
| 6563 | */ |
| 6564 | static int |
| 6565 | key_acquire2(struct socket *so, struct mbuf *m, |
| 6566 | const struct sadb_msghdr *mhp) |
| 6567 | { |
| 6568 | const struct sadb_address *src0, *dst0; |
| 6569 | struct secasindex saidx; |
| 6570 | struct secashead *sah; |
| 6571 | u_int16_t proto; |
| 6572 | int error; |
| 6573 | |
| 6574 | /* sanity check */ |
| 6575 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 6576 | panic("key_acquire2: NULL pointer is passed" ); |
| 6577 | |
| 6578 | /* |
| 6579 | * Error message from KMd. |
| 6580 | * We assume that if error was occurred in IKEd, the length of PFKEY |
| 6581 | * message is equal to the size of sadb_msg structure. |
| 6582 | * We do not raise error even if error occurred in this function. |
| 6583 | */ |
| 6584 | if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { |
| 6585 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 6586 | struct secacq *acq; |
| 6587 | |
| 6588 | /* check sequence number */ |
| 6589 | if (mhp->msg->sadb_msg_seq == 0) { |
| 6590 | ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n" )); |
| 6591 | m_freem(m); |
| 6592 | return 0; |
| 6593 | } |
| 6594 | |
| 6595 | if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { |
| 6596 | /* |
| 6597 | * the specified larval SA is already gone, or we got |
| 6598 | * a bogus sequence number. we can silently ignore it. |
| 6599 | */ |
| 6600 | m_freem(m); |
| 6601 | return 0; |
| 6602 | } |
| 6603 | |
| 6604 | /* reset acq counter in order to deletion by timehander. */ |
| 6605 | acq->created = time_uptime; |
| 6606 | acq->count = 0; |
| 6607 | #endif |
| 6608 | m_freem(m); |
| 6609 | return 0; |
| 6610 | } |
| 6611 | |
| 6612 | /* |
| 6613 | * This message is from user land. |
| 6614 | */ |
| 6615 | |
| 6616 | /* map satype to proto */ |
| 6617 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 6618 | ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n" )); |
| 6619 | return key_senderror(so, m, EINVAL); |
| 6620 | } |
| 6621 | |
| 6622 | if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || |
| 6623 | mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || |
| 6624 | mhp->ext[SADB_EXT_PROPOSAL] == NULL) { |
| 6625 | /* error */ |
| 6626 | ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n" )); |
| 6627 | return key_senderror(so, m, EINVAL); |
| 6628 | } |
| 6629 | if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || |
| 6630 | mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || |
| 6631 | mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { |
| 6632 | /* error */ |
| 6633 | ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n" )); |
| 6634 | return key_senderror(so, m, EINVAL); |
| 6635 | } |
| 6636 | |
| 6637 | src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; |
| 6638 | dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; |
| 6639 | |
| 6640 | if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, |
| 6641 | dst0 + 1, &saidx)) != 0) |
| 6642 | return key_senderror(so, m, EINVAL); |
| 6643 | |
| 6644 | if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) |
| 6645 | return key_senderror(so, m, EINVAL); |
| 6646 | |
| 6647 | /* get a SA index */ |
| 6648 | LIST_FOREACH(sah, &sahtree, chain) { |
| 6649 | if (sah->state == SADB_SASTATE_DEAD) |
| 6650 | continue; |
| 6651 | if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) |
| 6652 | break; |
| 6653 | } |
| 6654 | if (sah != NULL) { |
| 6655 | ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n" )); |
| 6656 | return key_senderror(so, m, EEXIST); |
| 6657 | } |
| 6658 | |
| 6659 | error = key_acquire(&saidx, NULL); |
| 6660 | if (error != 0) { |
| 6661 | ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " |
| 6662 | "from key_acquire.\n" , mhp->msg->sadb_msg_errno)); |
| 6663 | return key_senderror(so, m, error); |
| 6664 | } |
| 6665 | |
| 6666 | return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); |
| 6667 | } |
| 6668 | |
| 6669 | /* |
| 6670 | * SADB_REGISTER processing. |
| 6671 | * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. |
| 6672 | * receive |
| 6673 | * <base> |
| 6674 | * from the ikmpd, and register a socket to send PF_KEY messages, |
| 6675 | * and send |
| 6676 | * <base, supported> |
| 6677 | * to KMD by PF_KEY. |
| 6678 | * If socket is detached, must free from regnode. |
| 6679 | * |
| 6680 | * m will always be freed. |
| 6681 | */ |
| 6682 | static int |
| 6683 | key_register(struct socket *so, struct mbuf *m, |
| 6684 | const struct sadb_msghdr *mhp) |
| 6685 | { |
| 6686 | struct secreg *reg, *newreg = 0; |
| 6687 | |
| 6688 | /* sanity check */ |
| 6689 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 6690 | panic("key_register: NULL pointer is passed" ); |
| 6691 | |
| 6692 | /* check for invalid register message */ |
| 6693 | if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) |
| 6694 | return key_senderror(so, m, EINVAL); |
| 6695 | |
| 6696 | /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ |
| 6697 | if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) |
| 6698 | goto setmsg; |
| 6699 | |
| 6700 | /* check whether existing or not */ |
| 6701 | LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { |
| 6702 | if (reg->so == so) { |
| 6703 | ipseclog((LOG_DEBUG, "key_register: socket exists already.\n" )); |
| 6704 | return key_senderror(so, m, EEXIST); |
| 6705 | } |
| 6706 | } |
| 6707 | |
| 6708 | /* create regnode */ |
| 6709 | KMALLOC(newreg, struct secreg *, sizeof(*newreg)); |
| 6710 | if (newreg == NULL) { |
| 6711 | ipseclog((LOG_DEBUG, "key_register: No more memory.\n" )); |
| 6712 | return key_senderror(so, m, ENOBUFS); |
| 6713 | } |
| 6714 | memset(newreg, 0, sizeof(*newreg)); |
| 6715 | |
| 6716 | newreg->so = so; |
| 6717 | ((struct keycb *)sotorawcb(so))->kp_registered++; |
| 6718 | |
| 6719 | /* add regnode to regtree. */ |
| 6720 | LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); |
| 6721 | |
| 6722 | setmsg: |
| 6723 | { |
| 6724 | struct mbuf *n; |
| 6725 | struct sadb_msg *newmsg; |
| 6726 | struct sadb_supported *sup; |
| 6727 | u_int len, alen, elen; |
| 6728 | int off; |
| 6729 | int i; |
| 6730 | struct sadb_alg *alg; |
| 6731 | |
| 6732 | /* create new sadb_msg to reply. */ |
| 6733 | alen = 0; |
| 6734 | for (i = 1; i <= SADB_AALG_MAX; i++) { |
| 6735 | if (ah_algorithm_lookup(i)) |
| 6736 | alen += sizeof(struct sadb_alg); |
| 6737 | } |
| 6738 | if (alen) |
| 6739 | alen += sizeof(struct sadb_supported); |
| 6740 | elen = 0; |
| 6741 | for (i = 1; i <= SADB_EALG_MAX; i++) { |
| 6742 | if (esp_algorithm_lookup(i)) |
| 6743 | elen += sizeof(struct sadb_alg); |
| 6744 | } |
| 6745 | if (elen) |
| 6746 | elen += sizeof(struct sadb_supported); |
| 6747 | |
| 6748 | len = sizeof(struct sadb_msg) + alen + elen; |
| 6749 | |
| 6750 | if (len > MCLBYTES) |
| 6751 | return key_senderror(so, m, ENOBUFS); |
| 6752 | |
| 6753 | MGETHDR(n, M_DONTWAIT, MT_DATA); |
| 6754 | if (len > MHLEN) { |
| 6755 | MCLGET(n, M_DONTWAIT); |
| 6756 | if ((n->m_flags & M_EXT) == 0) { |
| 6757 | m_freem(n); |
| 6758 | n = NULL; |
| 6759 | } |
| 6760 | } |
| 6761 | if (!n) |
| 6762 | return key_senderror(so, m, ENOBUFS); |
| 6763 | |
| 6764 | n->m_pkthdr.len = n->m_len = len; |
| 6765 | n->m_next = NULL; |
| 6766 | off = 0; |
| 6767 | |
| 6768 | m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); |
| 6769 | newmsg = mtod(n, struct sadb_msg *); |
| 6770 | newmsg->sadb_msg_errno = 0; |
| 6771 | newmsg->sadb_msg_len = PFKEY_UNIT64(len); |
| 6772 | off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); |
| 6773 | |
| 6774 | /* for authentication algorithm */ |
| 6775 | if (alen) { |
| 6776 | sup = (struct sadb_supported *)(mtod(n, char *) + off); |
| 6777 | sup->sadb_supported_len = PFKEY_UNIT64(alen); |
| 6778 | sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; |
| 6779 | off += PFKEY_ALIGN8(sizeof(*sup)); |
| 6780 | |
| 6781 | for (i = 1; i <= SADB_AALG_MAX; i++) { |
| 6782 | const struct auth_hash *aalgo; |
| 6783 | u_int16_t minkeysize, maxkeysize; |
| 6784 | |
| 6785 | aalgo = ah_algorithm_lookup(i); |
| 6786 | if (!aalgo) |
| 6787 | continue; |
| 6788 | alg = (struct sadb_alg *)(mtod(n, char *) + off); |
| 6789 | alg->sadb_alg_id = i; |
| 6790 | alg->sadb_alg_ivlen = 0; |
| 6791 | key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); |
| 6792 | alg->sadb_alg_minbits = _BITS(minkeysize); |
| 6793 | alg->sadb_alg_maxbits = _BITS(maxkeysize); |
| 6794 | off += PFKEY_ALIGN8(sizeof(*alg)); |
| 6795 | } |
| 6796 | } |
| 6797 | |
| 6798 | /* for encryption algorithm */ |
| 6799 | if (elen) { |
| 6800 | sup = (struct sadb_supported *)(mtod(n, char *) + off); |
| 6801 | sup->sadb_supported_len = PFKEY_UNIT64(elen); |
| 6802 | sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; |
| 6803 | off += PFKEY_ALIGN8(sizeof(*sup)); |
| 6804 | |
| 6805 | for (i = 1; i <= SADB_EALG_MAX; i++) { |
| 6806 | const struct enc_xform *ealgo; |
| 6807 | |
| 6808 | ealgo = esp_algorithm_lookup(i); |
| 6809 | if (!ealgo) |
| 6810 | continue; |
| 6811 | alg = (struct sadb_alg *)(mtod(n, char *) + off); |
| 6812 | alg->sadb_alg_id = i; |
| 6813 | alg->sadb_alg_ivlen = ealgo->blocksize; |
| 6814 | alg->sadb_alg_minbits = _BITS(ealgo->minkey); |
| 6815 | alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); |
| 6816 | off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); |
| 6817 | } |
| 6818 | } |
| 6819 | |
| 6820 | #ifdef DIAGNOSTIC |
| 6821 | if (off != len) |
| 6822 | panic("length assumption failed in key_register" ); |
| 6823 | #endif |
| 6824 | |
| 6825 | m_freem(m); |
| 6826 | return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); |
| 6827 | } |
| 6828 | } |
| 6829 | |
| 6830 | /* |
| 6831 | * free secreg entry registered. |
| 6832 | * XXX: I want to do free a socket marked done SADB_RESIGER to socket. |
| 6833 | */ |
| 6834 | void |
| 6835 | key_freereg(struct socket *so) |
| 6836 | { |
| 6837 | struct secreg *reg; |
| 6838 | int i; |
| 6839 | |
| 6840 | /* sanity check */ |
| 6841 | if (so == NULL) |
| 6842 | panic("key_freereg: NULL pointer is passed" ); |
| 6843 | |
| 6844 | /* |
| 6845 | * check whether existing or not. |
| 6846 | * check all type of SA, because there is a potential that |
| 6847 | * one socket is registered to multiple type of SA. |
| 6848 | */ |
| 6849 | for (i = 0; i <= SADB_SATYPE_MAX; i++) { |
| 6850 | LIST_FOREACH(reg, ®tree[i], chain) { |
| 6851 | if (reg->so == so |
| 6852 | && __LIST_CHAINED(reg)) { |
| 6853 | LIST_REMOVE(reg, chain); |
| 6854 | KFREE(reg); |
| 6855 | break; |
| 6856 | } |
| 6857 | } |
| 6858 | } |
| 6859 | |
| 6860 | return; |
| 6861 | } |
| 6862 | |
| 6863 | /* |
| 6864 | * SADB_EXPIRE processing |
| 6865 | * send |
| 6866 | * <base, SA, SA2, lifetime(C and one of HS), address(SD)> |
| 6867 | * to KMD by PF_KEY. |
| 6868 | * NOTE: We send only soft lifetime extension. |
| 6869 | * |
| 6870 | * OUT: 0 : succeed |
| 6871 | * others : error number |
| 6872 | */ |
| 6873 | static int |
| 6874 | key_expire(struct secasvar *sav) |
| 6875 | { |
| 6876 | int s; |
| 6877 | int satype; |
| 6878 | struct mbuf *result = NULL, *m; |
| 6879 | int len; |
| 6880 | int error = -1; |
| 6881 | struct sadb_lifetime *lt; |
| 6882 | |
| 6883 | /* XXX: Why do we lock ? */ |
| 6884 | s = splsoftnet(); /*called from softclock()*/ |
| 6885 | |
| 6886 | /* sanity check */ |
| 6887 | if (sav == NULL) |
| 6888 | panic("key_expire: NULL pointer is passed" ); |
| 6889 | if (sav->sah == NULL) |
| 6890 | panic("key_expire: Why was SA index in SA NULL" ); |
| 6891 | if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) |
| 6892 | panic("key_expire: invalid proto is passed" ); |
| 6893 | |
| 6894 | /* set msg header */ |
| 6895 | m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); |
| 6896 | if (!m) { |
| 6897 | error = ENOBUFS; |
| 6898 | goto fail; |
| 6899 | } |
| 6900 | result = m; |
| 6901 | |
| 6902 | /* create SA extension */ |
| 6903 | m = key_setsadbsa(sav); |
| 6904 | if (!m) { |
| 6905 | error = ENOBUFS; |
| 6906 | goto fail; |
| 6907 | } |
| 6908 | m_cat(result, m); |
| 6909 | |
| 6910 | /* create SA extension */ |
| 6911 | m = key_setsadbxsa2(sav->sah->saidx.mode, |
| 6912 | sav->replay ? sav->replay->count : 0, |
| 6913 | sav->sah->saidx.reqid); |
| 6914 | if (!m) { |
| 6915 | error = ENOBUFS; |
| 6916 | goto fail; |
| 6917 | } |
| 6918 | m_cat(result, m); |
| 6919 | |
| 6920 | /* create lifetime extension (current and soft) */ |
| 6921 | len = PFKEY_ALIGN8(sizeof(*lt)) * 2; |
| 6922 | m = key_alloc_mbuf(len); |
| 6923 | if (!m || m->m_next) { /*XXX*/ |
| 6924 | if (m) |
| 6925 | m_freem(m); |
| 6926 | error = ENOBUFS; |
| 6927 | goto fail; |
| 6928 | } |
| 6929 | memset(mtod(m, void *), 0, len); |
| 6930 | lt = mtod(m, struct sadb_lifetime *); |
| 6931 | lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); |
| 6932 | lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; |
| 6933 | lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; |
| 6934 | lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; |
| 6935 | lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime |
| 6936 | + time_second - time_uptime; |
| 6937 | lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime |
| 6938 | + time_second - time_uptime; |
| 6939 | lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); |
| 6940 | memcpy(lt, sav->lft_s, sizeof(*lt)); |
| 6941 | m_cat(result, m); |
| 6942 | |
| 6943 | /* set sadb_address for source */ |
| 6944 | m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, |
| 6945 | &sav->sah->saidx.src.sa, |
| 6946 | FULLMASK, IPSEC_ULPROTO_ANY); |
| 6947 | if (!m) { |
| 6948 | error = ENOBUFS; |
| 6949 | goto fail; |
| 6950 | } |
| 6951 | m_cat(result, m); |
| 6952 | |
| 6953 | /* set sadb_address for destination */ |
| 6954 | m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, |
| 6955 | &sav->sah->saidx.dst.sa, |
| 6956 | FULLMASK, IPSEC_ULPROTO_ANY); |
| 6957 | if (!m) { |
| 6958 | error = ENOBUFS; |
| 6959 | goto fail; |
| 6960 | } |
| 6961 | m_cat(result, m); |
| 6962 | |
| 6963 | if ((result->m_flags & M_PKTHDR) == 0) { |
| 6964 | error = EINVAL; |
| 6965 | goto fail; |
| 6966 | } |
| 6967 | |
| 6968 | if (result->m_len < sizeof(struct sadb_msg)) { |
| 6969 | result = m_pullup(result, sizeof(struct sadb_msg)); |
| 6970 | if (result == NULL) { |
| 6971 | error = ENOBUFS; |
| 6972 | goto fail; |
| 6973 | } |
| 6974 | } |
| 6975 | |
| 6976 | result->m_pkthdr.len = 0; |
| 6977 | for (m = result; m; m = m->m_next) |
| 6978 | result->m_pkthdr.len += m->m_len; |
| 6979 | |
| 6980 | mtod(result, struct sadb_msg *)->sadb_msg_len = |
| 6981 | PFKEY_UNIT64(result->m_pkthdr.len); |
| 6982 | |
| 6983 | splx(s); |
| 6984 | return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); |
| 6985 | |
| 6986 | fail: |
| 6987 | if (result) |
| 6988 | m_freem(result); |
| 6989 | splx(s); |
| 6990 | return error; |
| 6991 | } |
| 6992 | |
| 6993 | /* |
| 6994 | * SADB_FLUSH processing |
| 6995 | * receive |
| 6996 | * <base> |
| 6997 | * from the ikmpd, and free all entries in secastree. |
| 6998 | * and send, |
| 6999 | * <base> |
| 7000 | * to the ikmpd. |
| 7001 | * NOTE: to do is only marking SADB_SASTATE_DEAD. |
| 7002 | * |
| 7003 | * m will always be freed. |
| 7004 | */ |
| 7005 | static int |
| 7006 | key_flush(struct socket *so, struct mbuf *m, |
| 7007 | const struct sadb_msghdr *mhp) |
| 7008 | { |
| 7009 | struct sadb_msg *newmsg; |
| 7010 | struct secashead *sah, *nextsah; |
| 7011 | struct secasvar *sav, *nextsav; |
| 7012 | u_int16_t proto; |
| 7013 | u_int8_t state; |
| 7014 | u_int stateidx; |
| 7015 | |
| 7016 | /* sanity check */ |
| 7017 | if (so == NULL || mhp == NULL || mhp->msg == NULL) |
| 7018 | panic("key_flush: NULL pointer is passed" ); |
| 7019 | |
| 7020 | /* map satype to proto */ |
| 7021 | if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { |
| 7022 | ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n" )); |
| 7023 | return key_senderror(so, m, EINVAL); |
| 7024 | } |
| 7025 | |
| 7026 | /* no SATYPE specified, i.e. flushing all SA. */ |
| 7027 | for (sah = LIST_FIRST(&sahtree); |
| 7028 | sah != NULL; |
| 7029 | sah = nextsah) { |
| 7030 | nextsah = LIST_NEXT(sah, chain); |
| 7031 | |
| 7032 | if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC |
| 7033 | && proto != sah->saidx.proto) |
| 7034 | continue; |
| 7035 | |
| 7036 | for (stateidx = 0; |
| 7037 | stateidx < _ARRAYLEN(saorder_state_alive); |
| 7038 | stateidx++) { |
| 7039 | state = saorder_state_any[stateidx]; |
| 7040 | for (sav = LIST_FIRST(&sah->savtree[state]); |
| 7041 | sav != NULL; |
| 7042 | sav = nextsav) { |
| 7043 | |
| 7044 | nextsav = LIST_NEXT(sav, chain); |
| 7045 | |
| 7046 | key_sa_chgstate(sav, SADB_SASTATE_DEAD); |
| 7047 | KEY_FREESAV(&sav); |
| 7048 | } |
| 7049 | } |
| 7050 | |
| 7051 | sah->state = SADB_SASTATE_DEAD; |
| 7052 | } |
| 7053 | |
| 7054 | if (m->m_len < sizeof(struct sadb_msg) || |
| 7055 | sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { |
| 7056 | ipseclog((LOG_DEBUG, "key_flush: No more memory.\n" )); |
| 7057 | return key_senderror(so, m, ENOBUFS); |
| 7058 | } |
| 7059 | |
| 7060 | if (m->m_next) |
| 7061 | m_freem(m->m_next); |
| 7062 | m->m_next = NULL; |
| 7063 | m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); |
| 7064 | newmsg = mtod(m, struct sadb_msg *); |
| 7065 | newmsg->sadb_msg_errno = 0; |
| 7066 | newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); |
| 7067 | |
| 7068 | return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); |
| 7069 | } |
| 7070 | |
| 7071 | |
| 7072 | static struct mbuf * |
| 7073 | key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) |
| 7074 | { |
| 7075 | struct secashead *sah; |
| 7076 | struct secasvar *sav; |
| 7077 | u_int16_t proto; |
| 7078 | u_int stateidx; |
| 7079 | u_int8_t satype; |
| 7080 | u_int8_t state; |
| 7081 | int cnt; |
| 7082 | struct mbuf *m, *n, *prev; |
| 7083 | |
| 7084 | *lenp = 0; |
| 7085 | |
| 7086 | /* map satype to proto */ |
| 7087 | if ((proto = key_satype2proto(req_satype)) == 0) { |
| 7088 | *errorp = EINVAL; |
| 7089 | return (NULL); |
| 7090 | } |
| 7091 | |
| 7092 | /* count sav entries to be sent to userland. */ |
| 7093 | cnt = 0; |
| 7094 | LIST_FOREACH(sah, &sahtree, chain) { |
| 7095 | if (req_satype != SADB_SATYPE_UNSPEC && |
| 7096 | proto != sah->saidx.proto) |
| 7097 | continue; |
| 7098 | |
| 7099 | for (stateidx = 0; |
| 7100 | stateidx < _ARRAYLEN(saorder_state_any); |
| 7101 | stateidx++) { |
| 7102 | state = saorder_state_any[stateidx]; |
| 7103 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 7104 | cnt++; |
| 7105 | } |
| 7106 | } |
| 7107 | } |
| 7108 | |
| 7109 | if (cnt == 0) { |
| 7110 | *errorp = ENOENT; |
| 7111 | return (NULL); |
| 7112 | } |
| 7113 | |
| 7114 | /* send this to the userland, one at a time. */ |
| 7115 | m = NULL; |
| 7116 | prev = m; |
| 7117 | LIST_FOREACH(sah, &sahtree, chain) { |
| 7118 | if (req_satype != SADB_SATYPE_UNSPEC && |
| 7119 | proto != sah->saidx.proto) |
| 7120 | continue; |
| 7121 | |
| 7122 | /* map proto to satype */ |
| 7123 | if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { |
| 7124 | m_freem(m); |
| 7125 | *errorp = EINVAL; |
| 7126 | return (NULL); |
| 7127 | } |
| 7128 | |
| 7129 | for (stateidx = 0; |
| 7130 | stateidx < _ARRAYLEN(saorder_state_any); |
| 7131 | stateidx++) { |
| 7132 | state = saorder_state_any[stateidx]; |
| 7133 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 7134 | n = key_setdumpsa(sav, SADB_DUMP, satype, |
| 7135 | --cnt, pid); |
| 7136 | if (!n) { |
| 7137 | m_freem(m); |
| 7138 | *errorp = ENOBUFS; |
| 7139 | return (NULL); |
| 7140 | } |
| 7141 | |
| 7142 | if (!m) |
| 7143 | m = n; |
| 7144 | else |
| 7145 | prev->m_nextpkt = n; |
| 7146 | prev = n; |
| 7147 | } |
| 7148 | } |
| 7149 | } |
| 7150 | |
| 7151 | if (!m) { |
| 7152 | *errorp = EINVAL; |
| 7153 | return (NULL); |
| 7154 | } |
| 7155 | |
| 7156 | if ((m->m_flags & M_PKTHDR) != 0) { |
| 7157 | m->m_pkthdr.len = 0; |
| 7158 | for (n = m; n; n = n->m_next) |
| 7159 | m->m_pkthdr.len += n->m_len; |
| 7160 | } |
| 7161 | |
| 7162 | *errorp = 0; |
| 7163 | return (m); |
| 7164 | } |
| 7165 | |
| 7166 | /* |
| 7167 | * SADB_DUMP processing |
| 7168 | * dump all entries including status of DEAD in SAD. |
| 7169 | * receive |
| 7170 | * <base> |
| 7171 | * from the ikmpd, and dump all secasvar leaves |
| 7172 | * and send, |
| 7173 | * <base> ..... |
| 7174 | * to the ikmpd. |
| 7175 | * |
| 7176 | * m will always be freed. |
| 7177 | */ |
| 7178 | static int |
| 7179 | key_dump(struct socket *so, struct mbuf *m0, |
| 7180 | const struct sadb_msghdr *mhp) |
| 7181 | { |
| 7182 | u_int16_t proto; |
| 7183 | u_int8_t satype; |
| 7184 | struct mbuf *n; |
| 7185 | int s; |
| 7186 | int error, len, ok; |
| 7187 | |
| 7188 | /* sanity check */ |
| 7189 | if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) |
| 7190 | panic("key_dump: NULL pointer is passed" ); |
| 7191 | |
| 7192 | /* map satype to proto */ |
| 7193 | satype = mhp->msg->sadb_msg_satype; |
| 7194 | if ((proto = key_satype2proto(satype)) == 0) { |
| 7195 | ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n" )); |
| 7196 | return key_senderror(so, m0, EINVAL); |
| 7197 | } |
| 7198 | |
| 7199 | /* |
| 7200 | * If the requestor has insufficient socket-buffer space |
| 7201 | * for the entire chain, nobody gets any response to the DUMP. |
| 7202 | * XXX For now, only the requestor ever gets anything. |
| 7203 | * Moreover, if the requestor has any space at all, they receive |
| 7204 | * the entire chain, otherwise the request is refused with ENOBUFS. |
| 7205 | */ |
| 7206 | if (sbspace(&so->so_rcv) <= 0) { |
| 7207 | return key_senderror(so, m0, ENOBUFS); |
| 7208 | } |
| 7209 | |
| 7210 | s = splsoftnet(); |
| 7211 | n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); |
| 7212 | splx(s); |
| 7213 | |
| 7214 | if (n == NULL) { |
| 7215 | return key_senderror(so, m0, ENOENT); |
| 7216 | } |
| 7217 | { |
| 7218 | uint64_t *ps = PFKEY_STAT_GETREF(); |
| 7219 | ps[PFKEY_STAT_IN_TOTAL]++; |
| 7220 | ps[PFKEY_STAT_IN_BYTES] += len; |
| 7221 | PFKEY_STAT_PUTREF(); |
| 7222 | } |
| 7223 | |
| 7224 | /* |
| 7225 | * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. |
| 7226 | * The requestor receives either the entire chain, or an |
| 7227 | * error message with ENOBUFS. |
| 7228 | * |
| 7229 | * sbappendaddrchain() takes the chain of entries, one |
| 7230 | * packet-record per SPD entry, prepends the key_src sockaddr |
| 7231 | * to each packet-record, links the sockaddr mbufs into a new |
| 7232 | * list of records, then appends the entire resulting |
| 7233 | * list to the requesting socket. |
| 7234 | */ |
| 7235 | ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, |
| 7236 | n, SB_PRIO_ONESHOT_OVERFLOW); |
| 7237 | |
| 7238 | if (!ok) { |
| 7239 | PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); |
| 7240 | m_freem(n); |
| 7241 | return key_senderror(so, m0, ENOBUFS); |
| 7242 | } |
| 7243 | |
| 7244 | m_freem(m0); |
| 7245 | return 0; |
| 7246 | } |
| 7247 | |
| 7248 | /* |
| 7249 | * SADB_X_PROMISC processing |
| 7250 | * |
| 7251 | * m will always be freed. |
| 7252 | */ |
| 7253 | static int |
| 7254 | key_promisc(struct socket *so, struct mbuf *m, |
| 7255 | const struct sadb_msghdr *mhp) |
| 7256 | { |
| 7257 | int olen; |
| 7258 | |
| 7259 | /* sanity check */ |
| 7260 | if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) |
| 7261 | panic("key_promisc: NULL pointer is passed" ); |
| 7262 | |
| 7263 | olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); |
| 7264 | |
| 7265 | if (olen < sizeof(struct sadb_msg)) { |
| 7266 | #if 1 |
| 7267 | return key_senderror(so, m, EINVAL); |
| 7268 | #else |
| 7269 | m_freem(m); |
| 7270 | return 0; |
| 7271 | #endif |
| 7272 | } else if (olen == sizeof(struct sadb_msg)) { |
| 7273 | /* enable/disable promisc mode */ |
| 7274 | struct keycb *kp; |
| 7275 | |
| 7276 | if ((kp = (struct keycb *)sotorawcb(so)) == NULL) |
| 7277 | return key_senderror(so, m, EINVAL); |
| 7278 | mhp->msg->sadb_msg_errno = 0; |
| 7279 | switch (mhp->msg->sadb_msg_satype) { |
| 7280 | case 0: |
| 7281 | case 1: |
| 7282 | kp->kp_promisc = mhp->msg->sadb_msg_satype; |
| 7283 | break; |
| 7284 | default: |
| 7285 | return key_senderror(so, m, EINVAL); |
| 7286 | } |
| 7287 | |
| 7288 | /* send the original message back to everyone */ |
| 7289 | mhp->msg->sadb_msg_errno = 0; |
| 7290 | return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); |
| 7291 | } else { |
| 7292 | /* send packet as is */ |
| 7293 | |
| 7294 | m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); |
| 7295 | |
| 7296 | /* TODO: if sadb_msg_seq is specified, send to specific pid */ |
| 7297 | return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); |
| 7298 | } |
| 7299 | } |
| 7300 | |
| 7301 | static int (*key_typesw[]) (struct socket *, struct mbuf *, |
| 7302 | const struct sadb_msghdr *) = { |
| 7303 | NULL, /* SADB_RESERVED */ |
| 7304 | key_getspi, /* SADB_GETSPI */ |
| 7305 | key_update, /* SADB_UPDATE */ |
| 7306 | key_add, /* SADB_ADD */ |
| 7307 | key_delete, /* SADB_DELETE */ |
| 7308 | key_get, /* SADB_GET */ |
| 7309 | key_acquire2, /* SADB_ACQUIRE */ |
| 7310 | key_register, /* SADB_REGISTER */ |
| 7311 | NULL, /* SADB_EXPIRE */ |
| 7312 | key_flush, /* SADB_FLUSH */ |
| 7313 | key_dump, /* SADB_DUMP */ |
| 7314 | key_promisc, /* SADB_X_PROMISC */ |
| 7315 | NULL, /* SADB_X_PCHANGE */ |
| 7316 | key_spdadd, /* SADB_X_SPDUPDATE */ |
| 7317 | key_spdadd, /* SADB_X_SPDADD */ |
| 7318 | key_spddelete, /* SADB_X_SPDDELETE */ |
| 7319 | key_spdget, /* SADB_X_SPDGET */ |
| 7320 | NULL, /* SADB_X_SPDACQUIRE */ |
| 7321 | key_spddump, /* SADB_X_SPDDUMP */ |
| 7322 | key_spdflush, /* SADB_X_SPDFLUSH */ |
| 7323 | key_spdadd, /* SADB_X_SPDSETIDX */ |
| 7324 | NULL, /* SADB_X_SPDEXPIRE */ |
| 7325 | key_spddelete2, /* SADB_X_SPDDELETE2 */ |
| 7326 | key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ |
| 7327 | }; |
| 7328 | |
| 7329 | /* |
| 7330 | * parse sadb_msg buffer to process PFKEYv2, |
| 7331 | * and create a data to response if needed. |
| 7332 | * I think to be dealed with mbuf directly. |
| 7333 | * IN: |
| 7334 | * msgp : pointer to pointer to a received buffer pulluped. |
| 7335 | * This is rewrited to response. |
| 7336 | * so : pointer to socket. |
| 7337 | * OUT: |
| 7338 | * length for buffer to send to user process. |
| 7339 | */ |
| 7340 | int |
| 7341 | key_parse(struct mbuf *m, struct socket *so) |
| 7342 | { |
| 7343 | struct sadb_msg *msg; |
| 7344 | struct sadb_msghdr mh; |
| 7345 | u_int orglen; |
| 7346 | int error; |
| 7347 | int target; |
| 7348 | |
| 7349 | /* sanity check */ |
| 7350 | if (m == NULL || so == NULL) |
| 7351 | panic("key_parse: NULL pointer is passed" ); |
| 7352 | |
| 7353 | #if 0 /*kdebug_sadb assumes msg in linear buffer*/ |
| 7354 | KEYDEBUG(KEYDEBUG_KEY_DUMP, |
| 7355 | ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n" )); |
| 7356 | kdebug_sadb(msg)); |
| 7357 | #endif |
| 7358 | |
| 7359 | if (m->m_len < sizeof(struct sadb_msg)) { |
| 7360 | m = m_pullup(m, sizeof(struct sadb_msg)); |
| 7361 | if (!m) |
| 7362 | return ENOBUFS; |
| 7363 | } |
| 7364 | msg = mtod(m, struct sadb_msg *); |
| 7365 | orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); |
| 7366 | target = KEY_SENDUP_ONE; |
| 7367 | |
| 7368 | if ((m->m_flags & M_PKTHDR) == 0 || |
| 7369 | m->m_pkthdr.len != orglen) { |
| 7370 | ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n" )); |
| 7371 | PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); |
| 7372 | error = EINVAL; |
| 7373 | goto senderror; |
| 7374 | } |
| 7375 | |
| 7376 | if (msg->sadb_msg_version != PF_KEY_V2) { |
| 7377 | ipseclog((LOG_DEBUG, |
| 7378 | "key_parse: PF_KEY version %u is mismatched.\n" , |
| 7379 | msg->sadb_msg_version)); |
| 7380 | PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); |
| 7381 | error = EINVAL; |
| 7382 | goto senderror; |
| 7383 | } |
| 7384 | |
| 7385 | if (msg->sadb_msg_type > SADB_MAX) { |
| 7386 | ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n" , |
| 7387 | msg->sadb_msg_type)); |
| 7388 | PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); |
| 7389 | error = EINVAL; |
| 7390 | goto senderror; |
| 7391 | } |
| 7392 | |
| 7393 | /* for old-fashioned code - should be nuked */ |
| 7394 | if (m->m_pkthdr.len > MCLBYTES) { |
| 7395 | m_freem(m); |
| 7396 | return ENOBUFS; |
| 7397 | } |
| 7398 | if (m->m_next) { |
| 7399 | struct mbuf *n; |
| 7400 | |
| 7401 | MGETHDR(n, M_DONTWAIT, MT_DATA); |
| 7402 | if (n && m->m_pkthdr.len > MHLEN) { |
| 7403 | MCLGET(n, M_DONTWAIT); |
| 7404 | if ((n->m_flags & M_EXT) == 0) { |
| 7405 | m_free(n); |
| 7406 | n = NULL; |
| 7407 | } |
| 7408 | } |
| 7409 | if (!n) { |
| 7410 | m_freem(m); |
| 7411 | return ENOBUFS; |
| 7412 | } |
| 7413 | m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); |
| 7414 | n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; |
| 7415 | n->m_next = NULL; |
| 7416 | m_freem(m); |
| 7417 | m = n; |
| 7418 | } |
| 7419 | |
| 7420 | /* align the mbuf chain so that extensions are in contiguous region. */ |
| 7421 | error = key_align(m, &mh); |
| 7422 | if (error) |
| 7423 | return error; |
| 7424 | |
| 7425 | if (m->m_next) { /*XXX*/ |
| 7426 | m_freem(m); |
| 7427 | return ENOBUFS; |
| 7428 | } |
| 7429 | |
| 7430 | msg = mh.msg; |
| 7431 | |
| 7432 | /* check SA type */ |
| 7433 | switch (msg->sadb_msg_satype) { |
| 7434 | case SADB_SATYPE_UNSPEC: |
| 7435 | switch (msg->sadb_msg_type) { |
| 7436 | case SADB_GETSPI: |
| 7437 | case SADB_UPDATE: |
| 7438 | case SADB_ADD: |
| 7439 | case SADB_DELETE: |
| 7440 | case SADB_GET: |
| 7441 | case SADB_ACQUIRE: |
| 7442 | case SADB_EXPIRE: |
| 7443 | ipseclog((LOG_DEBUG, "key_parse: must specify satype " |
| 7444 | "when msg type=%u.\n" , msg->sadb_msg_type)); |
| 7445 | PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); |
| 7446 | error = EINVAL; |
| 7447 | goto senderror; |
| 7448 | } |
| 7449 | break; |
| 7450 | case SADB_SATYPE_AH: |
| 7451 | case SADB_SATYPE_ESP: |
| 7452 | case SADB_X_SATYPE_IPCOMP: |
| 7453 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 7454 | switch (msg->sadb_msg_type) { |
| 7455 | case SADB_X_SPDADD: |
| 7456 | case SADB_X_SPDDELETE: |
| 7457 | case SADB_X_SPDGET: |
| 7458 | case SADB_X_SPDDUMP: |
| 7459 | case SADB_X_SPDFLUSH: |
| 7460 | case SADB_X_SPDSETIDX: |
| 7461 | case SADB_X_SPDUPDATE: |
| 7462 | case SADB_X_SPDDELETE2: |
| 7463 | ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n" , |
| 7464 | msg->sadb_msg_type)); |
| 7465 | PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); |
| 7466 | error = EINVAL; |
| 7467 | goto senderror; |
| 7468 | } |
| 7469 | break; |
| 7470 | case SADB_SATYPE_RSVP: |
| 7471 | case SADB_SATYPE_OSPFV2: |
| 7472 | case SADB_SATYPE_RIPV2: |
| 7473 | case SADB_SATYPE_MIP: |
| 7474 | ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n" , |
| 7475 | msg->sadb_msg_satype)); |
| 7476 | PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); |
| 7477 | error = EOPNOTSUPP; |
| 7478 | goto senderror; |
| 7479 | case 1: /* XXX: What does it do? */ |
| 7480 | if (msg->sadb_msg_type == SADB_X_PROMISC) |
| 7481 | break; |
| 7482 | /*FALLTHROUGH*/ |
| 7483 | default: |
| 7484 | ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n" , |
| 7485 | msg->sadb_msg_satype)); |
| 7486 | PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); |
| 7487 | error = EINVAL; |
| 7488 | goto senderror; |
| 7489 | } |
| 7490 | |
| 7491 | /* check field of upper layer protocol and address family */ |
| 7492 | if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL |
| 7493 | && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { |
| 7494 | struct sadb_address *src0, *dst0; |
| 7495 | u_int plen; |
| 7496 | |
| 7497 | src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); |
| 7498 | dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); |
| 7499 | |
| 7500 | /* check upper layer protocol */ |
| 7501 | if (src0->sadb_address_proto != dst0->sadb_address_proto) { |
| 7502 | ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n" )); |
| 7503 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7504 | error = EINVAL; |
| 7505 | goto senderror; |
| 7506 | } |
| 7507 | |
| 7508 | /* check family */ |
| 7509 | if (PFKEY_ADDR_SADDR(src0)->sa_family != |
| 7510 | PFKEY_ADDR_SADDR(dst0)->sa_family) { |
| 7511 | ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n" )); |
| 7512 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7513 | error = EINVAL; |
| 7514 | goto senderror; |
| 7515 | } |
| 7516 | if (PFKEY_ADDR_SADDR(src0)->sa_len != |
| 7517 | PFKEY_ADDR_SADDR(dst0)->sa_len) { |
| 7518 | ipseclog((LOG_DEBUG, |
| 7519 | "key_parse: address struct size mismatched.\n" )); |
| 7520 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7521 | error = EINVAL; |
| 7522 | goto senderror; |
| 7523 | } |
| 7524 | |
| 7525 | switch (PFKEY_ADDR_SADDR(src0)->sa_family) { |
| 7526 | case AF_INET: |
| 7527 | if (PFKEY_ADDR_SADDR(src0)->sa_len != |
| 7528 | sizeof(struct sockaddr_in)) { |
| 7529 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7530 | error = EINVAL; |
| 7531 | goto senderror; |
| 7532 | } |
| 7533 | break; |
| 7534 | case AF_INET6: |
| 7535 | if (PFKEY_ADDR_SADDR(src0)->sa_len != |
| 7536 | sizeof(struct sockaddr_in6)) { |
| 7537 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7538 | error = EINVAL; |
| 7539 | goto senderror; |
| 7540 | } |
| 7541 | break; |
| 7542 | default: |
| 7543 | ipseclog((LOG_DEBUG, |
| 7544 | "key_parse: unsupported address family.\n" )); |
| 7545 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7546 | error = EAFNOSUPPORT; |
| 7547 | goto senderror; |
| 7548 | } |
| 7549 | |
| 7550 | switch (PFKEY_ADDR_SADDR(src0)->sa_family) { |
| 7551 | case AF_INET: |
| 7552 | plen = sizeof(struct in_addr) << 3; |
| 7553 | break; |
| 7554 | case AF_INET6: |
| 7555 | plen = sizeof(struct in6_addr) << 3; |
| 7556 | break; |
| 7557 | default: |
| 7558 | plen = 0; /*fool gcc*/ |
| 7559 | break; |
| 7560 | } |
| 7561 | |
| 7562 | /* check max prefix length */ |
| 7563 | if (src0->sadb_address_prefixlen > plen || |
| 7564 | dst0->sadb_address_prefixlen > plen) { |
| 7565 | ipseclog((LOG_DEBUG, |
| 7566 | "key_parse: illegal prefixlen.\n" )); |
| 7567 | PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); |
| 7568 | error = EINVAL; |
| 7569 | goto senderror; |
| 7570 | } |
| 7571 | |
| 7572 | /* |
| 7573 | * prefixlen == 0 is valid because there can be a case when |
| 7574 | * all addresses are matched. |
| 7575 | */ |
| 7576 | } |
| 7577 | |
| 7578 | if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || |
| 7579 | key_typesw[msg->sadb_msg_type] == NULL) { |
| 7580 | PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); |
| 7581 | error = EINVAL; |
| 7582 | goto senderror; |
| 7583 | } |
| 7584 | |
| 7585 | return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); |
| 7586 | |
| 7587 | senderror: |
| 7588 | msg->sadb_msg_errno = error; |
| 7589 | return key_sendup_mbuf(so, m, target); |
| 7590 | } |
| 7591 | |
| 7592 | static int |
| 7593 | key_senderror(struct socket *so, struct mbuf *m, int code) |
| 7594 | { |
| 7595 | struct sadb_msg *msg; |
| 7596 | |
| 7597 | if (m->m_len < sizeof(struct sadb_msg)) |
| 7598 | panic("invalid mbuf passed to key_senderror" ); |
| 7599 | |
| 7600 | msg = mtod(m, struct sadb_msg *); |
| 7601 | msg->sadb_msg_errno = code; |
| 7602 | return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); |
| 7603 | } |
| 7604 | |
| 7605 | /* |
| 7606 | * set the pointer to each header into message buffer. |
| 7607 | * m will be freed on error. |
| 7608 | * XXX larger-than-MCLBYTES extension? |
| 7609 | */ |
| 7610 | static int |
| 7611 | key_align(struct mbuf *m, struct sadb_msghdr *mhp) |
| 7612 | { |
| 7613 | struct mbuf *n; |
| 7614 | struct sadb_ext *ext; |
| 7615 | size_t off, end; |
| 7616 | int extlen; |
| 7617 | int toff; |
| 7618 | |
| 7619 | /* sanity check */ |
| 7620 | if (m == NULL || mhp == NULL) |
| 7621 | panic("key_align: NULL pointer is passed" ); |
| 7622 | if (m->m_len < sizeof(struct sadb_msg)) |
| 7623 | panic("invalid mbuf passed to key_align" ); |
| 7624 | |
| 7625 | /* initialize */ |
| 7626 | memset(mhp, 0, sizeof(*mhp)); |
| 7627 | |
| 7628 | mhp->msg = mtod(m, struct sadb_msg *); |
| 7629 | mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ |
| 7630 | |
| 7631 | end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); |
| 7632 | extlen = end; /*just in case extlen is not updated*/ |
| 7633 | for (off = sizeof(struct sadb_msg); off < end; off += extlen) { |
| 7634 | n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); |
| 7635 | if (!n) { |
| 7636 | /* m is already freed */ |
| 7637 | return ENOBUFS; |
| 7638 | } |
| 7639 | ext = (struct sadb_ext *)(mtod(n, char *) + toff); |
| 7640 | |
| 7641 | /* set pointer */ |
| 7642 | switch (ext->sadb_ext_type) { |
| 7643 | case SADB_EXT_SA: |
| 7644 | case SADB_EXT_ADDRESS_SRC: |
| 7645 | case SADB_EXT_ADDRESS_DST: |
| 7646 | case SADB_EXT_ADDRESS_PROXY: |
| 7647 | case SADB_EXT_LIFETIME_CURRENT: |
| 7648 | case SADB_EXT_LIFETIME_HARD: |
| 7649 | case SADB_EXT_LIFETIME_SOFT: |
| 7650 | case SADB_EXT_KEY_AUTH: |
| 7651 | case SADB_EXT_KEY_ENCRYPT: |
| 7652 | case SADB_EXT_IDENTITY_SRC: |
| 7653 | case SADB_EXT_IDENTITY_DST: |
| 7654 | case SADB_EXT_SENSITIVITY: |
| 7655 | case SADB_EXT_PROPOSAL: |
| 7656 | case SADB_EXT_SUPPORTED_AUTH: |
| 7657 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 7658 | case SADB_EXT_SPIRANGE: |
| 7659 | case SADB_X_EXT_POLICY: |
| 7660 | case SADB_X_EXT_SA2: |
| 7661 | case SADB_X_EXT_NAT_T_TYPE: |
| 7662 | case SADB_X_EXT_NAT_T_SPORT: |
| 7663 | case SADB_X_EXT_NAT_T_DPORT: |
| 7664 | case SADB_X_EXT_NAT_T_OAI: |
| 7665 | case SADB_X_EXT_NAT_T_OAR: |
| 7666 | case SADB_X_EXT_NAT_T_FRAG: |
| 7667 | /* duplicate check */ |
| 7668 | /* |
| 7669 | * XXX Are there duplication payloads of either |
| 7670 | * KEY_AUTH or KEY_ENCRYPT ? |
| 7671 | */ |
| 7672 | if (mhp->ext[ext->sadb_ext_type] != NULL) { |
| 7673 | ipseclog((LOG_DEBUG, |
| 7674 | "key_align: duplicate ext_type %u " |
| 7675 | "is passed.\n" , ext->sadb_ext_type)); |
| 7676 | m_freem(m); |
| 7677 | PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); |
| 7678 | return EINVAL; |
| 7679 | } |
| 7680 | break; |
| 7681 | default: |
| 7682 | ipseclog((LOG_DEBUG, |
| 7683 | "key_align: invalid ext_type %u is passed.\n" , |
| 7684 | ext->sadb_ext_type)); |
| 7685 | m_freem(m); |
| 7686 | PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); |
| 7687 | return EINVAL; |
| 7688 | } |
| 7689 | |
| 7690 | extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); |
| 7691 | |
| 7692 | if (key_validate_ext(ext, extlen)) { |
| 7693 | m_freem(m); |
| 7694 | PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); |
| 7695 | return EINVAL; |
| 7696 | } |
| 7697 | |
| 7698 | n = m_pulldown(m, off, extlen, &toff); |
| 7699 | if (!n) { |
| 7700 | /* m is already freed */ |
| 7701 | return ENOBUFS; |
| 7702 | } |
| 7703 | ext = (struct sadb_ext *)(mtod(n, char *) + toff); |
| 7704 | |
| 7705 | mhp->ext[ext->sadb_ext_type] = ext; |
| 7706 | mhp->extoff[ext->sadb_ext_type] = off; |
| 7707 | mhp->extlen[ext->sadb_ext_type] = extlen; |
| 7708 | } |
| 7709 | |
| 7710 | if (off != end) { |
| 7711 | m_freem(m); |
| 7712 | PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); |
| 7713 | return EINVAL; |
| 7714 | } |
| 7715 | |
| 7716 | return 0; |
| 7717 | } |
| 7718 | |
| 7719 | static int |
| 7720 | key_validate_ext(const struct sadb_ext *ext, int len) |
| 7721 | { |
| 7722 | const struct sockaddr *sa; |
| 7723 | enum { NONE, ADDR } checktype = NONE; |
| 7724 | int baselen = 0; |
| 7725 | const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); |
| 7726 | |
| 7727 | if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) |
| 7728 | return EINVAL; |
| 7729 | |
| 7730 | /* if it does not match minimum/maximum length, bail */ |
| 7731 | if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || |
| 7732 | ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) |
| 7733 | return EINVAL; |
| 7734 | if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) |
| 7735 | return EINVAL; |
| 7736 | if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) |
| 7737 | return EINVAL; |
| 7738 | |
| 7739 | /* more checks based on sadb_ext_type XXX need more */ |
| 7740 | switch (ext->sadb_ext_type) { |
| 7741 | case SADB_EXT_ADDRESS_SRC: |
| 7742 | case SADB_EXT_ADDRESS_DST: |
| 7743 | case SADB_EXT_ADDRESS_PROXY: |
| 7744 | baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); |
| 7745 | checktype = ADDR; |
| 7746 | break; |
| 7747 | case SADB_EXT_IDENTITY_SRC: |
| 7748 | case SADB_EXT_IDENTITY_DST: |
| 7749 | if (((const struct sadb_ident *)ext)->sadb_ident_type == |
| 7750 | SADB_X_IDENTTYPE_ADDR) { |
| 7751 | baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); |
| 7752 | checktype = ADDR; |
| 7753 | } else |
| 7754 | checktype = NONE; |
| 7755 | break; |
| 7756 | default: |
| 7757 | checktype = NONE; |
| 7758 | break; |
| 7759 | } |
| 7760 | |
| 7761 | switch (checktype) { |
| 7762 | case NONE: |
| 7763 | break; |
| 7764 | case ADDR: |
| 7765 | sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); |
| 7766 | if (len < baselen + sal) |
| 7767 | return EINVAL; |
| 7768 | if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) |
| 7769 | return EINVAL; |
| 7770 | break; |
| 7771 | } |
| 7772 | |
| 7773 | return 0; |
| 7774 | } |
| 7775 | |
| 7776 | static int |
| 7777 | key_do_init(void) |
| 7778 | { |
| 7779 | int i; |
| 7780 | |
| 7781 | pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); |
| 7782 | |
| 7783 | callout_init(&key_timehandler_ch, 0); |
| 7784 | |
| 7785 | for (i = 0; i < IPSEC_DIR_MAX; i++) { |
| 7786 | LIST_INIT(&sptree[i]); |
| 7787 | } |
| 7788 | |
| 7789 | LIST_INIT(&sahtree); |
| 7790 | |
| 7791 | for (i = 0; i <= SADB_SATYPE_MAX; i++) { |
| 7792 | LIST_INIT(®tree[i]); |
| 7793 | } |
| 7794 | |
| 7795 | #ifndef IPSEC_NONBLOCK_ACQUIRE |
| 7796 | LIST_INIT(&acqtree); |
| 7797 | #endif |
| 7798 | LIST_INIT(&spacqtree); |
| 7799 | |
| 7800 | /* system default */ |
| 7801 | ip4_def_policy.policy = IPSEC_POLICY_NONE; |
| 7802 | ip4_def_policy.refcnt++; /*never reclaim this*/ |
| 7803 | |
| 7804 | #ifdef INET6 |
| 7805 | ip6_def_policy.policy = IPSEC_POLICY_NONE; |
| 7806 | ip6_def_policy.refcnt++; /*never reclaim this*/ |
| 7807 | #endif |
| 7808 | |
| 7809 | |
| 7810 | #ifndef IPSEC_DEBUG2 |
| 7811 | callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); |
| 7812 | #endif /*IPSEC_DEBUG2*/ |
| 7813 | |
| 7814 | /* initialize key statistics */ |
| 7815 | keystat.getspi_count = 1; |
| 7816 | |
| 7817 | aprint_verbose("IPsec: Initialized Security Association Processing.\n" ); |
| 7818 | |
| 7819 | return (0); |
| 7820 | } |
| 7821 | |
| 7822 | void |
| 7823 | key_init(void) |
| 7824 | { |
| 7825 | static ONCE_DECL(key_init_once); |
| 7826 | |
| 7827 | RUN_ONCE(&key_init_once, key_do_init); |
| 7828 | } |
| 7829 | |
| 7830 | /* |
| 7831 | * XXX: maybe This function is called after INBOUND IPsec processing. |
| 7832 | * |
| 7833 | * Special check for tunnel-mode packets. |
| 7834 | * We must make some checks for consistency between inner and outer IP header. |
| 7835 | * |
| 7836 | * xxx more checks to be provided |
| 7837 | */ |
| 7838 | int |
| 7839 | key_checktunnelsanity( |
| 7840 | struct secasvar *sav, |
| 7841 | u_int family, |
| 7842 | void *src, |
| 7843 | void *dst |
| 7844 | ) |
| 7845 | { |
| 7846 | /* sanity check */ |
| 7847 | if (sav->sah == NULL) |
| 7848 | panic("sav->sah == NULL at key_checktunnelsanity" ); |
| 7849 | |
| 7850 | /* XXX: check inner IP header */ |
| 7851 | |
| 7852 | return 1; |
| 7853 | } |
| 7854 | |
| 7855 | #if 0 |
| 7856 | #define hostnamelen strlen(hostname) |
| 7857 | |
| 7858 | /* |
| 7859 | * Get FQDN for the host. |
| 7860 | * If the administrator configured hostname (by hostname(1)) without |
| 7861 | * domain name, returns nothing. |
| 7862 | */ |
| 7863 | static const char * |
| 7864 | key_getfqdn(void) |
| 7865 | { |
| 7866 | int i; |
| 7867 | int hasdot; |
| 7868 | static char fqdn[MAXHOSTNAMELEN + 1]; |
| 7869 | |
| 7870 | if (!hostnamelen) |
| 7871 | return NULL; |
| 7872 | |
| 7873 | /* check if it comes with domain name. */ |
| 7874 | hasdot = 0; |
| 7875 | for (i = 0; i < hostnamelen; i++) { |
| 7876 | if (hostname[i] == '.') |
| 7877 | hasdot++; |
| 7878 | } |
| 7879 | if (!hasdot) |
| 7880 | return NULL; |
| 7881 | |
| 7882 | /* NOTE: hostname may not be NUL-terminated. */ |
| 7883 | memset(fqdn, 0, sizeof(fqdn)); |
| 7884 | memcpy(fqdn, hostname, hostnamelen); |
| 7885 | fqdn[hostnamelen] = '\0'; |
| 7886 | return fqdn; |
| 7887 | } |
| 7888 | |
| 7889 | /* |
| 7890 | * get username@FQDN for the host/user. |
| 7891 | */ |
| 7892 | static const char * |
| 7893 | key_getuserfqdn(void) |
| 7894 | { |
| 7895 | const char *host; |
| 7896 | static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; |
| 7897 | struct proc *p = curproc; |
| 7898 | char *q; |
| 7899 | |
| 7900 | if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) |
| 7901 | return NULL; |
| 7902 | if (!(host = key_getfqdn())) |
| 7903 | return NULL; |
| 7904 | |
| 7905 | /* NOTE: s_login may not be-NUL terminated. */ |
| 7906 | memset(userfqdn, 0, sizeof(userfqdn)); |
| 7907 | memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); |
| 7908 | userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ |
| 7909 | q = userfqdn + strlen(userfqdn); |
| 7910 | *q++ = '@'; |
| 7911 | memcpy(q, host, strlen(host)); |
| 7912 | q += strlen(host); |
| 7913 | *q++ = '\0'; |
| 7914 | |
| 7915 | return userfqdn; |
| 7916 | } |
| 7917 | #endif |
| 7918 | |
| 7919 | /* record data transfer on SA, and update timestamps */ |
| 7920 | void |
| 7921 | key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) |
| 7922 | { |
| 7923 | IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar" )); |
| 7924 | IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf" )); |
| 7925 | if (!sav->lft_c) |
| 7926 | return; |
| 7927 | |
| 7928 | /* |
| 7929 | * XXX Currently, there is a difference of bytes size |
| 7930 | * between inbound and outbound processing. |
| 7931 | */ |
| 7932 | sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; |
| 7933 | /* to check bytes lifetime is done in key_timehandler(). */ |
| 7934 | |
| 7935 | /* |
| 7936 | * We use the number of packets as the unit of |
| 7937 | * sadb_lifetime_allocations. We increment the variable |
| 7938 | * whenever {esp,ah}_{in,out}put is called. |
| 7939 | */ |
| 7940 | sav->lft_c->sadb_lifetime_allocations++; |
| 7941 | /* XXX check for expires? */ |
| 7942 | |
| 7943 | /* |
| 7944 | * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, |
| 7945 | * in seconds. HARD and SOFT lifetime are measured by the time |
| 7946 | * difference (again in seconds) from sadb_lifetime_usetime. |
| 7947 | * |
| 7948 | * usetime |
| 7949 | * v expire expire |
| 7950 | * -----+-----+--------+---> t |
| 7951 | * <--------------> HARD |
| 7952 | * <-----> SOFT |
| 7953 | */ |
| 7954 | sav->lft_c->sadb_lifetime_usetime = time_uptime; |
| 7955 | /* XXX check for expires? */ |
| 7956 | |
| 7957 | return; |
| 7958 | } |
| 7959 | |
| 7960 | /* dumb version */ |
| 7961 | void |
| 7962 | key_sa_routechange(struct sockaddr *dst) |
| 7963 | { |
| 7964 | struct secashead *sah; |
| 7965 | struct route *ro; |
| 7966 | const struct sockaddr *sa; |
| 7967 | |
| 7968 | LIST_FOREACH(sah, &sahtree, chain) { |
| 7969 | ro = &sah->sa_route; |
| 7970 | sa = rtcache_getdst(ro); |
| 7971 | if (sa != NULL && dst->sa_len == sa->sa_len && |
| 7972 | memcmp(dst, sa, dst->sa_len) == 0) |
| 7973 | rtcache_free(ro); |
| 7974 | } |
| 7975 | |
| 7976 | return; |
| 7977 | } |
| 7978 | |
| 7979 | static void |
| 7980 | key_sa_chgstate(struct secasvar *sav, u_int8_t state) |
| 7981 | { |
| 7982 | if (sav == NULL) |
| 7983 | panic("key_sa_chgstate called with sav == NULL" ); |
| 7984 | |
| 7985 | if (sav->state == state) |
| 7986 | return; |
| 7987 | |
| 7988 | if (__LIST_CHAINED(sav)) |
| 7989 | LIST_REMOVE(sav, chain); |
| 7990 | |
| 7991 | sav->state = state; |
| 7992 | LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); |
| 7993 | } |
| 7994 | |
| 7995 | /* XXX too much? */ |
| 7996 | static struct mbuf * |
| 7997 | key_alloc_mbuf(int l) |
| 7998 | { |
| 7999 | struct mbuf *m = NULL, *n; |
| 8000 | int len, t; |
| 8001 | |
| 8002 | len = l; |
| 8003 | while (len > 0) { |
| 8004 | MGET(n, M_DONTWAIT, MT_DATA); |
| 8005 | if (n && len > MLEN) |
| 8006 | MCLGET(n, M_DONTWAIT); |
| 8007 | if (!n) { |
| 8008 | m_freem(m); |
| 8009 | return NULL; |
| 8010 | } |
| 8011 | |
| 8012 | n->m_next = NULL; |
| 8013 | n->m_len = 0; |
| 8014 | n->m_len = M_TRAILINGSPACE(n); |
| 8015 | /* use the bottom of mbuf, hoping we can prepend afterwards */ |
| 8016 | if (n->m_len > len) { |
| 8017 | t = (n->m_len - len) & ~(sizeof(long) - 1); |
| 8018 | n->m_data += t; |
| 8019 | n->m_len = len; |
| 8020 | } |
| 8021 | |
| 8022 | len -= n->m_len; |
| 8023 | |
| 8024 | if (m) |
| 8025 | m_cat(m, n); |
| 8026 | else |
| 8027 | m = n; |
| 8028 | } |
| 8029 | |
| 8030 | return m; |
| 8031 | } |
| 8032 | |
| 8033 | static struct mbuf * |
| 8034 | key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) |
| 8035 | { |
| 8036 | struct secashead *sah; |
| 8037 | struct secasvar *sav; |
| 8038 | u_int16_t proto; |
| 8039 | u_int stateidx; |
| 8040 | u_int8_t satype; |
| 8041 | u_int8_t state; |
| 8042 | int cnt; |
| 8043 | struct mbuf *m, *n; |
| 8044 | |
| 8045 | /* map satype to proto */ |
| 8046 | if ((proto = key_satype2proto(req_satype)) == 0) { |
| 8047 | *errorp = EINVAL; |
| 8048 | return (NULL); |
| 8049 | } |
| 8050 | |
| 8051 | /* count sav entries to be sent to the userland. */ |
| 8052 | cnt = 0; |
| 8053 | LIST_FOREACH(sah, &sahtree, chain) { |
| 8054 | if (req_satype != SADB_SATYPE_UNSPEC && |
| 8055 | proto != sah->saidx.proto) |
| 8056 | continue; |
| 8057 | |
| 8058 | for (stateidx = 0; |
| 8059 | stateidx < _ARRAYLEN(saorder_state_any); |
| 8060 | stateidx++) { |
| 8061 | state = saorder_state_any[stateidx]; |
| 8062 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 8063 | cnt++; |
| 8064 | } |
| 8065 | } |
| 8066 | } |
| 8067 | |
| 8068 | if (cnt == 0) { |
| 8069 | *errorp = ENOENT; |
| 8070 | return (NULL); |
| 8071 | } |
| 8072 | |
| 8073 | /* send this to the userland, one at a time. */ |
| 8074 | m = NULL; |
| 8075 | LIST_FOREACH(sah, &sahtree, chain) { |
| 8076 | if (req_satype != SADB_SATYPE_UNSPEC && |
| 8077 | proto != sah->saidx.proto) |
| 8078 | continue; |
| 8079 | |
| 8080 | /* map proto to satype */ |
| 8081 | if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { |
| 8082 | m_freem(m); |
| 8083 | *errorp = EINVAL; |
| 8084 | return (NULL); |
| 8085 | } |
| 8086 | |
| 8087 | for (stateidx = 0; |
| 8088 | stateidx < _ARRAYLEN(saorder_state_any); |
| 8089 | stateidx++) { |
| 8090 | state = saorder_state_any[stateidx]; |
| 8091 | LIST_FOREACH(sav, &sah->savtree[state], chain) { |
| 8092 | n = key_setdumpsa(sav, SADB_DUMP, satype, |
| 8093 | --cnt, pid); |
| 8094 | if (!n) { |
| 8095 | m_freem(m); |
| 8096 | *errorp = ENOBUFS; |
| 8097 | return (NULL); |
| 8098 | } |
| 8099 | |
| 8100 | if (!m) |
| 8101 | m = n; |
| 8102 | else |
| 8103 | m_cat(m, n); |
| 8104 | } |
| 8105 | } |
| 8106 | } |
| 8107 | |
| 8108 | if (!m) { |
| 8109 | *errorp = EINVAL; |
| 8110 | return (NULL); |
| 8111 | } |
| 8112 | |
| 8113 | if ((m->m_flags & M_PKTHDR) != 0) { |
| 8114 | m->m_pkthdr.len = 0; |
| 8115 | for (n = m; n; n = n->m_next) |
| 8116 | m->m_pkthdr.len += n->m_len; |
| 8117 | } |
| 8118 | |
| 8119 | *errorp = 0; |
| 8120 | return (m); |
| 8121 | } |
| 8122 | |
| 8123 | static struct mbuf * |
| 8124 | key_setspddump(int *errorp, pid_t pid) |
| 8125 | { |
| 8126 | struct secpolicy *sp; |
| 8127 | int cnt; |
| 8128 | u_int dir; |
| 8129 | struct mbuf *m, *n; |
| 8130 | |
| 8131 | /* search SPD entry and get buffer size. */ |
| 8132 | cnt = 0; |
| 8133 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 8134 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 8135 | cnt++; |
| 8136 | } |
| 8137 | } |
| 8138 | |
| 8139 | if (cnt == 0) { |
| 8140 | *errorp = ENOENT; |
| 8141 | return (NULL); |
| 8142 | } |
| 8143 | |
| 8144 | m = NULL; |
| 8145 | for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { |
| 8146 | LIST_FOREACH(sp, &sptree[dir], chain) { |
| 8147 | --cnt; |
| 8148 | n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); |
| 8149 | |
| 8150 | if (!n) { |
| 8151 | *errorp = ENOBUFS; |
| 8152 | m_freem(m); |
| 8153 | return (NULL); |
| 8154 | } |
| 8155 | if (!m) |
| 8156 | m = n; |
| 8157 | else { |
| 8158 | m->m_pkthdr.len += n->m_pkthdr.len; |
| 8159 | m_cat(m, n); |
| 8160 | } |
| 8161 | } |
| 8162 | } |
| 8163 | |
| 8164 | *errorp = 0; |
| 8165 | return (m); |
| 8166 | } |
| 8167 | |
| 8168 | int |
| 8169 | key_get_used(void) { |
| 8170 | return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || |
| 8171 | !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); |
| 8172 | } |
| 8173 | |
| 8174 | void |
| 8175 | key_update_used(void) |
| 8176 | { |
| 8177 | switch (ipsec_enabled) { |
| 8178 | default: |
| 8179 | case 0: |
| 8180 | #ifdef notyet |
| 8181 | /* XXX: racy */ |
| 8182 | ipsec_used = 0; |
| 8183 | #endif |
| 8184 | break; |
| 8185 | case 1: |
| 8186 | #ifndef notyet |
| 8187 | /* XXX: racy */ |
| 8188 | if (!ipsec_used) |
| 8189 | #endif |
| 8190 | ipsec_used = key_get_used(); |
| 8191 | break; |
| 8192 | case 2: |
| 8193 | ipsec_used = 1; |
| 8194 | break; |
| 8195 | } |
| 8196 | } |
| 8197 | |
| 8198 | static int |
| 8199 | sysctl_net_key_dumpsa(SYSCTLFN_ARGS) |
| 8200 | { |
| 8201 | struct mbuf *m, *n; |
| 8202 | int err2 = 0; |
| 8203 | char *p, *ep; |
| 8204 | size_t len; |
| 8205 | int s, error; |
| 8206 | |
| 8207 | if (newp) |
| 8208 | return (EPERM); |
| 8209 | if (namelen != 1) |
| 8210 | return (EINVAL); |
| 8211 | |
| 8212 | s = splsoftnet(); |
| 8213 | m = key_setdump(name[0], &error, l->l_proc->p_pid); |
| 8214 | splx(s); |
| 8215 | if (!m) |
| 8216 | return (error); |
| 8217 | if (!oldp) |
| 8218 | *oldlenp = m->m_pkthdr.len; |
| 8219 | else { |
| 8220 | p = oldp; |
| 8221 | if (*oldlenp < m->m_pkthdr.len) { |
| 8222 | err2 = ENOMEM; |
| 8223 | ep = p + *oldlenp; |
| 8224 | } else { |
| 8225 | *oldlenp = m->m_pkthdr.len; |
| 8226 | ep = p + m->m_pkthdr.len; |
| 8227 | } |
| 8228 | for (n = m; n; n = n->m_next) { |
| 8229 | len = (ep - p < n->m_len) ? |
| 8230 | ep - p : n->m_len; |
| 8231 | error = copyout(mtod(n, const void *), p, len); |
| 8232 | p += len; |
| 8233 | if (error) |
| 8234 | break; |
| 8235 | } |
| 8236 | if (error == 0) |
| 8237 | error = err2; |
| 8238 | } |
| 8239 | m_freem(m); |
| 8240 | |
| 8241 | return (error); |
| 8242 | } |
| 8243 | |
| 8244 | static int |
| 8245 | sysctl_net_key_dumpsp(SYSCTLFN_ARGS) |
| 8246 | { |
| 8247 | struct mbuf *m, *n; |
| 8248 | int err2 = 0; |
| 8249 | char *p, *ep; |
| 8250 | size_t len; |
| 8251 | int s, error; |
| 8252 | |
| 8253 | if (newp) |
| 8254 | return (EPERM); |
| 8255 | if (namelen != 0) |
| 8256 | return (EINVAL); |
| 8257 | |
| 8258 | s = splsoftnet(); |
| 8259 | m = key_setspddump(&error, l->l_proc->p_pid); |
| 8260 | splx(s); |
| 8261 | if (!m) |
| 8262 | return (error); |
| 8263 | if (!oldp) |
| 8264 | *oldlenp = m->m_pkthdr.len; |
| 8265 | else { |
| 8266 | p = oldp; |
| 8267 | if (*oldlenp < m->m_pkthdr.len) { |
| 8268 | err2 = ENOMEM; |
| 8269 | ep = p + *oldlenp; |
| 8270 | } else { |
| 8271 | *oldlenp = m->m_pkthdr.len; |
| 8272 | ep = p + m->m_pkthdr.len; |
| 8273 | } |
| 8274 | for (n = m; n; n = n->m_next) { |
| 8275 | len = (ep - p < n->m_len) ? |
| 8276 | ep - p : n->m_len; |
| 8277 | error = copyout(mtod(n, const void *), p, len); |
| 8278 | p += len; |
| 8279 | if (error) |
| 8280 | break; |
| 8281 | } |
| 8282 | if (error == 0) |
| 8283 | error = err2; |
| 8284 | } |
| 8285 | m_freem(m); |
| 8286 | |
| 8287 | return (error); |
| 8288 | } |
| 8289 | |
| 8290 | /* |
| 8291 | * Create sysctl tree for native IPSEC key knobs, originally |
| 8292 | * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. |
| 8293 | * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; |
| 8294 | * and in any case the part of our sysctl namespace used for dumping the |
| 8295 | * SPD and SA database *HAS* to be compatible with the KAME sysctl |
| 8296 | * namespace, for API reasons. |
| 8297 | * |
| 8298 | * Pending a consensus on the right way to fix this, add a level of |
| 8299 | * indirection in how we number the `native' IPSEC key nodes; |
| 8300 | * and (as requested by Andrew Brown) move registration of the |
| 8301 | * KAME-compatible names to a separate function. |
| 8302 | */ |
| 8303 | #if 0 |
| 8304 | # define IPSEC_PFKEY PF_KEY_V2 |
| 8305 | # define IPSEC_PFKEY_NAME "keyv2" |
| 8306 | #else |
| 8307 | # define IPSEC_PFKEY PF_KEY |
| 8308 | # define IPSEC_PFKEY_NAME "key" |
| 8309 | #endif |
| 8310 | |
| 8311 | static int |
| 8312 | sysctl_net_key_stats(SYSCTLFN_ARGS) |
| 8313 | { |
| 8314 | |
| 8315 | return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); |
| 8316 | } |
| 8317 | |
| 8318 | SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup" ) |
| 8319 | { |
| 8320 | |
| 8321 | sysctl_createv(clog, 0, NULL, NULL, |
| 8322 | CTLFLAG_PERMANENT, |
| 8323 | CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, |
| 8324 | NULL, 0, NULL, 0, |
| 8325 | CTL_NET, IPSEC_PFKEY, CTL_EOL); |
| 8326 | |
| 8327 | sysctl_createv(clog, 0, NULL, NULL, |
| 8328 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8329 | CTLTYPE_INT, "debug" , NULL, |
| 8330 | NULL, 0, &key_debug_level, 0, |
| 8331 | CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); |
| 8332 | sysctl_createv(clog, 0, NULL, NULL, |
| 8333 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8334 | CTLTYPE_INT, "spi_try" , NULL, |
| 8335 | NULL, 0, &key_spi_trycnt, 0, |
| 8336 | CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); |
| 8337 | sysctl_createv(clog, 0, NULL, NULL, |
| 8338 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8339 | CTLTYPE_INT, "spi_min_value" , NULL, |
| 8340 | NULL, 0, &key_spi_minval, 0, |
| 8341 | CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); |
| 8342 | sysctl_createv(clog, 0, NULL, NULL, |
| 8343 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8344 | CTLTYPE_INT, "spi_max_value" , NULL, |
| 8345 | NULL, 0, &key_spi_maxval, 0, |
| 8346 | CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); |
| 8347 | sysctl_createv(clog, 0, NULL, NULL, |
| 8348 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8349 | CTLTYPE_INT, "random_int" , NULL, |
| 8350 | NULL, 0, &key_int_random, 0, |
| 8351 | CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); |
| 8352 | sysctl_createv(clog, 0, NULL, NULL, |
| 8353 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8354 | CTLTYPE_INT, "larval_lifetime" , NULL, |
| 8355 | NULL, 0, &key_larval_lifetime, 0, |
| 8356 | CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); |
| 8357 | sysctl_createv(clog, 0, NULL, NULL, |
| 8358 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8359 | CTLTYPE_INT, "blockacq_count" , NULL, |
| 8360 | NULL, 0, &key_blockacq_count, 0, |
| 8361 | CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); |
| 8362 | sysctl_createv(clog, 0, NULL, NULL, |
| 8363 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8364 | CTLTYPE_INT, "blockacq_lifetime" , NULL, |
| 8365 | NULL, 0, &key_blockacq_lifetime, 0, |
| 8366 | CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); |
| 8367 | sysctl_createv(clog, 0, NULL, NULL, |
| 8368 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8369 | CTLTYPE_INT, "esp_keymin" , NULL, |
| 8370 | NULL, 0, &ipsec_esp_keymin, 0, |
| 8371 | CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); |
| 8372 | sysctl_createv(clog, 0, NULL, NULL, |
| 8373 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8374 | CTLTYPE_INT, "prefered_oldsa" , NULL, |
| 8375 | NULL, 0, &key_prefered_oldsa, 0, |
| 8376 | CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); |
| 8377 | sysctl_createv(clog, 0, NULL, NULL, |
| 8378 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8379 | CTLTYPE_INT, "esp_auth" , NULL, |
| 8380 | NULL, 0, &ipsec_esp_auth, 0, |
| 8381 | CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); |
| 8382 | sysctl_createv(clog, 0, NULL, NULL, |
| 8383 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 8384 | CTLTYPE_INT, "ah_keymin" , NULL, |
| 8385 | NULL, 0, &ipsec_ah_keymin, 0, |
| 8386 | CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); |
| 8387 | sysctl_createv(clog, 0, NULL, NULL, |
| 8388 | CTLFLAG_PERMANENT, |
| 8389 | CTLTYPE_STRUCT, "stats" , |
| 8390 | SYSCTL_DESCR("PF_KEY statistics" ), |
| 8391 | sysctl_net_key_stats, 0, NULL, 0, |
| 8392 | CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); |
| 8393 | } |
| 8394 | |
| 8395 | /* |
| 8396 | * Register sysctl names used by setkey(8). For historical reasons, |
| 8397 | * and to share a single API, these names appear under { CTL_NET, PF_KEY } |
| 8398 | * for both IPSEC and KAME IPSEC. |
| 8399 | */ |
| 8400 | SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC" ) |
| 8401 | { |
| 8402 | |
| 8403 | sysctl_createv(clog, 0, NULL, NULL, |
| 8404 | CTLFLAG_PERMANENT, |
| 8405 | CTLTYPE_NODE, "key" , NULL, |
| 8406 | NULL, 0, NULL, 0, |
| 8407 | CTL_NET, PF_KEY, CTL_EOL); |
| 8408 | |
| 8409 | /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ |
| 8410 | sysctl_createv(clog, 0, NULL, NULL, |
| 8411 | CTLFLAG_PERMANENT, |
| 8412 | CTLTYPE_STRUCT, "dumpsa" , NULL, |
| 8413 | sysctl_net_key_dumpsa, 0, NULL, 0, |
| 8414 | CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); |
| 8415 | sysctl_createv(clog, 0, NULL, NULL, |
| 8416 | CTLFLAG_PERMANENT, |
| 8417 | CTLTYPE_STRUCT, "dumpsp" , NULL, |
| 8418 | sysctl_net_key_dumpsp, 0, NULL, 0, |
| 8419 | CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); |
| 8420 | } |
| 8421 | |