| 1 | /* $NetBSD: if_spppsubr.c,v 1.157 2016/11/18 10:38:55 knakahara Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Synchronous PPP/Cisco link level subroutines. |
| 5 | * Keepalive protocol implemented in both Cisco and PPP modes. |
| 6 | * |
| 7 | * Copyright (C) 1994-1996 Cronyx Engineering Ltd. |
| 8 | * Author: Serge Vakulenko, <vak@cronyx.ru> |
| 9 | * |
| 10 | * Heavily revamped to conform to RFC 1661. |
| 11 | * Copyright (C) 1997, Joerg Wunsch. |
| 12 | * |
| 13 | * RFC2472 IPv6CP support. |
| 14 | * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun@iijlab.net>. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions are met: |
| 18 | * 1. Redistributions of source code must retain the above copyright notice, |
| 19 | * this list of conditions and the following disclaimer. |
| 20 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 21 | * this list of conditions and the following disclaimer in the documentation |
| 22 | * and/or other materials provided with the distribution. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY |
| 25 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | * |
| 36 | * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 |
| 37 | * |
| 38 | * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp |
| 39 | * |
| 40 | * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp |
| 41 | */ |
| 42 | |
| 43 | #include <sys/cdefs.h> |
| 44 | __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.157 2016/11/18 10:38:55 knakahara Exp $" ); |
| 45 | |
| 46 | #if defined(_KERNEL_OPT) |
| 47 | #include "opt_inet.h" |
| 48 | #include "opt_modular.h" |
| 49 | #include "opt_compat_netbsd.h" |
| 50 | #include "opt_net_mpsafe.h" |
| 51 | #endif |
| 52 | |
| 53 | |
| 54 | #include <sys/param.h> |
| 55 | #include <sys/proc.h> |
| 56 | #include <sys/systm.h> |
| 57 | #include <sys/kernel.h> |
| 58 | #include <sys/sockio.h> |
| 59 | #include <sys/socket.h> |
| 60 | #include <sys/syslog.h> |
| 61 | #include <sys/malloc.h> |
| 62 | #include <sys/mbuf.h> |
| 63 | #include <sys/callout.h> |
| 64 | #include <sys/md5.h> |
| 65 | #include <sys/inttypes.h> |
| 66 | #include <sys/kauth.h> |
| 67 | #include <sys/cprng.h> |
| 68 | #include <sys/module.h> |
| 69 | |
| 70 | #include <net/if.h> |
| 71 | #include <net/netisr.h> |
| 72 | #include <net/if_types.h> |
| 73 | #include <net/route.h> |
| 74 | #include <net/ppp_defs.h> |
| 75 | |
| 76 | #include <netinet/in.h> |
| 77 | #include <netinet/in_systm.h> |
| 78 | #include <netinet/in_var.h> |
| 79 | #ifdef INET |
| 80 | #include <netinet/ip.h> |
| 81 | #include <netinet/tcp.h> |
| 82 | #endif |
| 83 | #include <net/ethertypes.h> |
| 84 | |
| 85 | #ifdef INET6 |
| 86 | #include <netinet6/scope6_var.h> |
| 87 | #endif |
| 88 | |
| 89 | #include <net/if_sppp.h> |
| 90 | #include <net/if_spppvar.h> |
| 91 | |
| 92 | #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ |
| 93 | #define LOOPALIVECNT 3 /* loopback detection tries */ |
| 94 | #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ |
| 95 | #define DEFAULT_NORECV_TIME 15 /* before we get worried */ |
| 96 | #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ |
| 97 | |
| 98 | /* |
| 99 | * Interface flags that can be set in an ifconfig command. |
| 100 | * |
| 101 | * Setting link0 will make the link passive, i.e. it will be marked |
| 102 | * as being administrative openable, but won't be opened to begin |
| 103 | * with. Incoming calls will be answered, or subsequent calls with |
| 104 | * -link1 will cause the administrative open of the LCP layer. |
| 105 | * |
| 106 | * Setting link1 will cause the link to auto-dial only as packets |
| 107 | * arrive to be sent. |
| 108 | * |
| 109 | * Setting IFF_DEBUG will syslog the option negotiation and state |
| 110 | * transitions at level kern.debug. Note: all logs consistently look |
| 111 | * like |
| 112 | * |
| 113 | * <if-name><unit>: <proto-name> <additional info...> |
| 114 | * |
| 115 | * with <if-name><unit> being something like "bppp0", and <proto-name> |
| 116 | * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. |
| 117 | */ |
| 118 | |
| 119 | #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ |
| 120 | #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ |
| 121 | |
| 122 | #define CONF_REQ 1 /* PPP configure request */ |
| 123 | #define CONF_ACK 2 /* PPP configure acknowledge */ |
| 124 | #define CONF_NAK 3 /* PPP configure negative ack */ |
| 125 | #define CONF_REJ 4 /* PPP configure reject */ |
| 126 | #define TERM_REQ 5 /* PPP terminate request */ |
| 127 | #define TERM_ACK 6 /* PPP terminate acknowledge */ |
| 128 | #define CODE_REJ 7 /* PPP code reject */ |
| 129 | #define PROTO_REJ 8 /* PPP protocol reject */ |
| 130 | #define ECHO_REQ 9 /* PPP echo request */ |
| 131 | #define ECHO_REPLY 10 /* PPP echo reply */ |
| 132 | #define DISC_REQ 11 /* PPP discard request */ |
| 133 | |
| 134 | #define LCP_OPT_MRU 1 /* maximum receive unit */ |
| 135 | #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ |
| 136 | #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ |
| 137 | #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ |
| 138 | #define LCP_OPT_MAGIC 5 /* magic number */ |
| 139 | #define LCP_OPT_RESERVED 6 /* reserved */ |
| 140 | #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ |
| 141 | #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ |
| 142 | |
| 143 | #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ |
| 144 | #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ |
| 145 | #define IPCP_OPT_ADDRESS 3 /* local IP address */ |
| 146 | #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ |
| 147 | #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ |
| 148 | |
| 149 | #define IPV6CP_OPT_IFID 1 /* interface identifier */ |
| 150 | #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ |
| 151 | |
| 152 | #define PAP_REQ 1 /* PAP name/password request */ |
| 153 | #define PAP_ACK 2 /* PAP acknowledge */ |
| 154 | #define PAP_NAK 3 /* PAP fail */ |
| 155 | |
| 156 | #define CHAP_CHALLENGE 1 /* CHAP challenge request */ |
| 157 | #define CHAP_RESPONSE 2 /* CHAP challenge response */ |
| 158 | #define CHAP_SUCCESS 3 /* CHAP response ok */ |
| 159 | #define CHAP_FAILURE 4 /* CHAP response failed */ |
| 160 | |
| 161 | #define CHAP_MD5 5 /* hash algorithm - MD5 */ |
| 162 | |
| 163 | #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ |
| 164 | #define CISCO_UNICAST 0x0f /* Cisco unicast address */ |
| 165 | #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ |
| 166 | #define CISCO_ADDR_REQ 0 /* Cisco address request */ |
| 167 | #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ |
| 168 | #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ |
| 169 | |
| 170 | /* states are named and numbered according to RFC 1661 */ |
| 171 | #define STATE_INITIAL 0 |
| 172 | #define STATE_STARTING 1 |
| 173 | #define STATE_CLOSED 2 |
| 174 | #define STATE_STOPPED 3 |
| 175 | #define STATE_CLOSING 4 |
| 176 | #define STATE_STOPPING 5 |
| 177 | #define STATE_REQ_SENT 6 |
| 178 | #define STATE_ACK_RCVD 7 |
| 179 | #define STATE_ACK_SENT 8 |
| 180 | #define STATE_OPENED 9 |
| 181 | |
| 182 | struct { |
| 183 | uint8_t ; |
| 184 | uint8_t ; |
| 185 | uint16_t ; |
| 186 | } __packed; |
| 187 | #define sizeof (struct ppp_header) |
| 188 | |
| 189 | struct { |
| 190 | uint8_t ; |
| 191 | uint8_t ; |
| 192 | uint16_t ; |
| 193 | } __packed; |
| 194 | #define sizeof (struct lcp_header) |
| 195 | |
| 196 | struct cisco_packet { |
| 197 | uint32_t type; |
| 198 | uint32_t par1; |
| 199 | uint32_t par2; |
| 200 | uint16_t rel; |
| 201 | uint16_t time0; |
| 202 | uint16_t time1; |
| 203 | } __packed; |
| 204 | #define CISCO_PACKET_LEN 18 |
| 205 | |
| 206 | /* |
| 207 | * We follow the spelling and capitalization of RFC 1661 here, to make |
| 208 | * it easier comparing with the standard. Please refer to this RFC in |
| 209 | * case you can't make sense out of these abbreviation; it will also |
| 210 | * explain the semantics related to the various events and actions. |
| 211 | */ |
| 212 | struct cp { |
| 213 | u_short proto; /* PPP control protocol number */ |
| 214 | u_char protoidx; /* index into state table in struct sppp */ |
| 215 | u_char flags; |
| 216 | #define CP_LCP 0x01 /* this is the LCP */ |
| 217 | #define CP_AUTH 0x02 /* this is an authentication protocol */ |
| 218 | #define CP_NCP 0x04 /* this is a NCP */ |
| 219 | #define CP_QUAL 0x08 /* this is a quality reporting protocol */ |
| 220 | const char *name; /* name of this control protocol */ |
| 221 | /* event handlers */ |
| 222 | void (*Up)(struct sppp *sp); |
| 223 | void (*Down)(struct sppp *sp); |
| 224 | void (*Open)(struct sppp *sp); |
| 225 | void (*Close)(struct sppp *sp); |
| 226 | void (*TO)(void *sp); |
| 227 | int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); |
| 228 | void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); |
| 229 | void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); |
| 230 | /* actions */ |
| 231 | void (*tlu)(struct sppp *sp); |
| 232 | void (*tld)(struct sppp *sp); |
| 233 | void (*tls)(struct sppp *sp); |
| 234 | void (*tlf)(struct sppp *sp); |
| 235 | void (*scr)(struct sppp *sp); |
| 236 | }; |
| 237 | |
| 238 | static struct sppp *spppq; |
| 239 | static callout_t keepalive_ch; |
| 240 | |
| 241 | #ifdef INET |
| 242 | /* |
| 243 | * The following disgusting hack gets around the problem that IP TOS |
| 244 | * can't be set yet. We want to put "interactive" traffic on a high |
| 245 | * priority queue. To decide if traffic is interactive, we check that |
| 246 | * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. |
| 247 | * |
| 248 | * XXX is this really still necessary? - joerg - |
| 249 | */ |
| 250 | static u_short interactive_ports[8] = { |
| 251 | 0, 513, 0, 0, |
| 252 | 0, 21, 0, 23, |
| 253 | }; |
| 254 | #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) |
| 255 | #endif |
| 256 | |
| 257 | /* almost every function needs these */ |
| 258 | #define STDDCL \ |
| 259 | struct ifnet *ifp = &sp->pp_if; \ |
| 260 | int debug = ifp->if_flags & IFF_DEBUG |
| 261 | |
| 262 | static int sppp_output(struct ifnet *ifp, struct mbuf *m, |
| 263 | const struct sockaddr *dst, const struct rtentry *rt); |
| 264 | |
| 265 | static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); |
| 266 | static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); |
| 267 | |
| 268 | static void sppp_cp_input(const struct cp *cp, struct sppp *sp, |
| 269 | struct mbuf *m); |
| 270 | static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, |
| 271 | u_char ident, u_short len, void *data); |
| 272 | /* static void sppp_cp_timeout(void *arg); */ |
| 273 | static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, |
| 274 | int newstate); |
| 275 | static void sppp_auth_send(const struct cp *cp, |
| 276 | struct sppp *sp, unsigned int type, unsigned int id, |
| 277 | ...); |
| 278 | |
| 279 | static void sppp_up_event(const struct cp *cp, struct sppp *sp); |
| 280 | static void sppp_down_event(const struct cp *cp, struct sppp *sp); |
| 281 | static void sppp_open_event(const struct cp *cp, struct sppp *sp); |
| 282 | static void sppp_close_event(const struct cp *cp, struct sppp *sp); |
| 283 | static void sppp_to_event(const struct cp *cp, struct sppp *sp); |
| 284 | |
| 285 | static void sppp_null(struct sppp *sp); |
| 286 | |
| 287 | static void sppp_lcp_init(struct sppp *sp); |
| 288 | static void sppp_lcp_up(struct sppp *sp); |
| 289 | static void sppp_lcp_down(struct sppp *sp); |
| 290 | static void sppp_lcp_open(struct sppp *sp); |
| 291 | static void sppp_lcp_close(struct sppp *sp); |
| 292 | static void sppp_lcp_TO(void *sp); |
| 293 | static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); |
| 294 | static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); |
| 295 | static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); |
| 296 | static void sppp_lcp_tlu(struct sppp *sp); |
| 297 | static void sppp_lcp_tld(struct sppp *sp); |
| 298 | static void sppp_lcp_tls(struct sppp *sp); |
| 299 | static void sppp_lcp_tlf(struct sppp *sp); |
| 300 | static void sppp_lcp_scr(struct sppp *sp); |
| 301 | static void sppp_lcp_check_and_close(struct sppp *sp); |
| 302 | static int sppp_ncp_check(struct sppp *sp); |
| 303 | |
| 304 | static void sppp_ipcp_init(struct sppp *sp); |
| 305 | static void sppp_ipcp_up(struct sppp *sp); |
| 306 | static void sppp_ipcp_down(struct sppp *sp); |
| 307 | static void sppp_ipcp_open(struct sppp *sp); |
| 308 | static void sppp_ipcp_close(struct sppp *sp); |
| 309 | static void sppp_ipcp_TO(void *sp); |
| 310 | static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); |
| 311 | static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); |
| 312 | static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); |
| 313 | static void sppp_ipcp_tlu(struct sppp *sp); |
| 314 | static void sppp_ipcp_tld(struct sppp *sp); |
| 315 | static void sppp_ipcp_tls(struct sppp *sp); |
| 316 | static void sppp_ipcp_tlf(struct sppp *sp); |
| 317 | static void sppp_ipcp_scr(struct sppp *sp); |
| 318 | |
| 319 | static void sppp_ipv6cp_init(struct sppp *sp); |
| 320 | static void sppp_ipv6cp_up(struct sppp *sp); |
| 321 | static void sppp_ipv6cp_down(struct sppp *sp); |
| 322 | static void sppp_ipv6cp_open(struct sppp *sp); |
| 323 | static void sppp_ipv6cp_close(struct sppp *sp); |
| 324 | static void sppp_ipv6cp_TO(void *sp); |
| 325 | static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); |
| 326 | static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); |
| 327 | static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); |
| 328 | static void sppp_ipv6cp_tlu(struct sppp *sp); |
| 329 | static void sppp_ipv6cp_tld(struct sppp *sp); |
| 330 | static void sppp_ipv6cp_tls(struct sppp *sp); |
| 331 | static void sppp_ipv6cp_tlf(struct sppp *sp); |
| 332 | static void sppp_ipv6cp_scr(struct sppp *sp); |
| 333 | |
| 334 | static void sppp_pap_input(struct sppp *sp, struct mbuf *m); |
| 335 | static void sppp_pap_init(struct sppp *sp); |
| 336 | static void sppp_pap_open(struct sppp *sp); |
| 337 | static void sppp_pap_close(struct sppp *sp); |
| 338 | static void sppp_pap_TO(void *sp); |
| 339 | static void sppp_pap_my_TO(void *sp); |
| 340 | static void sppp_pap_tlu(struct sppp *sp); |
| 341 | static void sppp_pap_tld(struct sppp *sp); |
| 342 | static void sppp_pap_scr(struct sppp *sp); |
| 343 | |
| 344 | static void sppp_chap_input(struct sppp *sp, struct mbuf *m); |
| 345 | static void sppp_chap_init(struct sppp *sp); |
| 346 | static void sppp_chap_open(struct sppp *sp); |
| 347 | static void sppp_chap_close(struct sppp *sp); |
| 348 | static void sppp_chap_TO(void *sp); |
| 349 | static void sppp_chap_tlu(struct sppp *sp); |
| 350 | static void sppp_chap_tld(struct sppp *sp); |
| 351 | static void sppp_chap_scr(struct sppp *sp); |
| 352 | |
| 353 | static const char *sppp_auth_type_name(u_short proto, u_char type); |
| 354 | static const char *sppp_cp_type_name(u_char type); |
| 355 | static const char *sppp_dotted_quad(uint32_t addr); |
| 356 | static const char *sppp_ipcp_opt_name(u_char opt); |
| 357 | #ifdef INET6 |
| 358 | static const char *sppp_ipv6cp_opt_name(u_char opt); |
| 359 | #endif |
| 360 | static const char *sppp_lcp_opt_name(u_char opt); |
| 361 | static const char *sppp_phase_name(int phase); |
| 362 | static const char *sppp_proto_name(u_short proto); |
| 363 | static const char *sppp_state_name(int state); |
| 364 | static int sppp_params(struct sppp *sp, u_long cmd, void *data); |
| 365 | #ifdef INET |
| 366 | static void sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, |
| 367 | uint32_t *srcmask); |
| 368 | static void sppp_set_ip_addrs(struct sppp *sp, uint32_t myaddr, uint32_t hisaddr); |
| 369 | static void sppp_clear_ip_addrs(struct sppp *sp); |
| 370 | #endif |
| 371 | static void sppp_keepalive(void *dummy); |
| 372 | static void sppp_phase_network(struct sppp *sp); |
| 373 | static void sppp_print_bytes(const u_char *p, u_short len); |
| 374 | static void sppp_print_string(const char *p, u_short len); |
| 375 | #ifdef INET6 |
| 376 | static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, |
| 377 | struct in6_addr *dst, struct in6_addr *srcmask); |
| 378 | #ifdef IPV6CP_MYIFID_DYN |
| 379 | static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); |
| 380 | static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); |
| 381 | #endif |
| 382 | static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); |
| 383 | #endif |
| 384 | |
| 385 | /* our control protocol descriptors */ |
| 386 | static const struct cp lcp = { |
| 387 | PPP_LCP, IDX_LCP, CP_LCP, "lcp" , |
| 388 | sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, |
| 389 | sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, |
| 390 | sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, |
| 391 | sppp_lcp_scr |
| 392 | }; |
| 393 | |
| 394 | static const struct cp ipcp = { |
| 395 | PPP_IPCP, IDX_IPCP, |
| 396 | #ifdef INET |
| 397 | CP_NCP, /*don't run IPCP if there's no IPv4 support*/ |
| 398 | #else |
| 399 | 0, |
| 400 | #endif |
| 401 | "ipcp" , |
| 402 | sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, |
| 403 | sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, |
| 404 | sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, |
| 405 | sppp_ipcp_scr |
| 406 | }; |
| 407 | |
| 408 | static const struct cp ipv6cp = { |
| 409 | PPP_IPV6CP, IDX_IPV6CP, |
| 410 | #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ |
| 411 | CP_NCP, |
| 412 | #else |
| 413 | 0, |
| 414 | #endif |
| 415 | "ipv6cp" , |
| 416 | sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, |
| 417 | sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, |
| 418 | sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, |
| 419 | sppp_ipv6cp_scr |
| 420 | }; |
| 421 | |
| 422 | static const struct cp pap = { |
| 423 | PPP_PAP, IDX_PAP, CP_AUTH, "pap" , |
| 424 | sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, |
| 425 | sppp_pap_TO, 0, 0, 0, |
| 426 | sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, |
| 427 | sppp_pap_scr |
| 428 | }; |
| 429 | |
| 430 | static const struct cp chap = { |
| 431 | PPP_CHAP, IDX_CHAP, CP_AUTH, "chap" , |
| 432 | sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, |
| 433 | sppp_chap_TO, 0, 0, 0, |
| 434 | sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, |
| 435 | sppp_chap_scr |
| 436 | }; |
| 437 | |
| 438 | static const struct cp *cps[IDX_COUNT] = { |
| 439 | &lcp, /* IDX_LCP */ |
| 440 | &ipcp, /* IDX_IPCP */ |
| 441 | &ipv6cp, /* IDX_IPV6CP */ |
| 442 | &pap, /* IDX_PAP */ |
| 443 | &chap, /* IDX_CHAP */ |
| 444 | }; |
| 445 | |
| 446 | static void |
| 447 | sppp_change_phase(struct sppp *sp, int phase) |
| 448 | { |
| 449 | STDDCL; |
| 450 | |
| 451 | if (sp->pp_phase == phase) |
| 452 | return; |
| 453 | |
| 454 | sp->pp_phase = phase; |
| 455 | |
| 456 | if (phase == SPPP_PHASE_NETWORK) |
| 457 | if_link_state_change(ifp, LINK_STATE_UP); |
| 458 | else |
| 459 | if_link_state_change(ifp, LINK_STATE_DOWN); |
| 460 | |
| 461 | if (debug) |
| 462 | { |
| 463 | log(LOG_INFO, "%s: phase %s\n" , ifp->if_xname, |
| 464 | sppp_phase_name(sp->pp_phase)); |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | /* |
| 469 | * Exported functions, comprising our interface to the lower layer. |
| 470 | */ |
| 471 | |
| 472 | /* |
| 473 | * Process the received packet. |
| 474 | */ |
| 475 | void |
| 476 | sppp_input(struct ifnet *ifp, struct mbuf *m) |
| 477 | { |
| 478 | struct ppp_header *h = NULL; |
| 479 | pktqueue_t *pktq = NULL; |
| 480 | struct ifqueue *inq = NULL; |
| 481 | uint16_t protocol; |
| 482 | struct sppp *sp = (struct sppp *)ifp; |
| 483 | int debug = ifp->if_flags & IFF_DEBUG; |
| 484 | int isr = 0; |
| 485 | |
| 486 | if (ifp->if_flags & IFF_UP) { |
| 487 | /* Count received bytes, add hardware framing */ |
| 488 | ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; |
| 489 | /* Note time of last receive */ |
| 490 | sp->pp_last_receive = time_uptime; |
| 491 | } |
| 492 | |
| 493 | if (m->m_pkthdr.len <= PPP_HEADER_LEN) { |
| 494 | /* Too small packet, drop it. */ |
| 495 | if (debug) |
| 496 | log(LOG_DEBUG, |
| 497 | "%s: input packet is too small, %d bytes\n" , |
| 498 | ifp->if_xname, m->m_pkthdr.len); |
| 499 | drop: |
| 500 | ++ifp->if_ierrors; |
| 501 | ++ifp->if_iqdrops; |
| 502 | m_freem(m); |
| 503 | return; |
| 504 | } |
| 505 | |
| 506 | if (sp->pp_flags & PP_NOFRAMING) { |
| 507 | memcpy(&protocol, mtod(m, void *), 2); |
| 508 | protocol = ntohs(protocol); |
| 509 | m_adj(m, 2); |
| 510 | } else { |
| 511 | |
| 512 | /* Get PPP header. */ |
| 513 | h = mtod(m, struct ppp_header *); |
| 514 | m_adj(m, PPP_HEADER_LEN); |
| 515 | |
| 516 | switch (h->address) { |
| 517 | case PPP_ALLSTATIONS: |
| 518 | if (h->control != PPP_UI) |
| 519 | goto invalid; |
| 520 | if (sp->pp_flags & PP_CISCO) { |
| 521 | if (debug) |
| 522 | log(LOG_DEBUG, |
| 523 | "%s: PPP packet in Cisco mode " |
| 524 | "<addr=0x%x ctrl=0x%x proto=0x%x>\n" , |
| 525 | ifp->if_xname, |
| 526 | h->address, h->control, ntohs(h->protocol)); |
| 527 | goto drop; |
| 528 | } |
| 529 | break; |
| 530 | case CISCO_MULTICAST: |
| 531 | case CISCO_UNICAST: |
| 532 | /* Don't check the control field here (RFC 1547). */ |
| 533 | if (! (sp->pp_flags & PP_CISCO)) { |
| 534 | if (debug) |
| 535 | log(LOG_DEBUG, |
| 536 | "%s: Cisco packet in PPP mode " |
| 537 | "<addr=0x%x ctrl=0x%x proto=0x%x>\n" , |
| 538 | ifp->if_xname, |
| 539 | h->address, h->control, ntohs(h->protocol)); |
| 540 | goto drop; |
| 541 | } |
| 542 | switch (ntohs(h->protocol)) { |
| 543 | default: |
| 544 | ++ifp->if_noproto; |
| 545 | goto invalid; |
| 546 | case CISCO_KEEPALIVE: |
| 547 | sppp_cisco_input((struct sppp *) ifp, m); |
| 548 | m_freem(m); |
| 549 | return; |
| 550 | #ifdef INET |
| 551 | case ETHERTYPE_IP: |
| 552 | pktq = ip_pktq; |
| 553 | break; |
| 554 | #endif |
| 555 | #ifdef INET6 |
| 556 | case ETHERTYPE_IPV6: |
| 557 | pktq = ip6_pktq; |
| 558 | break; |
| 559 | #endif |
| 560 | } |
| 561 | goto queue_pkt; |
| 562 | default: /* Invalid PPP packet. */ |
| 563 | invalid: |
| 564 | if (debug) |
| 565 | log(LOG_DEBUG, |
| 566 | "%s: invalid input packet " |
| 567 | "<addr=0x%x ctrl=0x%x proto=0x%x>\n" , |
| 568 | ifp->if_xname, |
| 569 | h->address, h->control, ntohs(h->protocol)); |
| 570 | goto drop; |
| 571 | } |
| 572 | protocol = ntohs(h->protocol); |
| 573 | } |
| 574 | |
| 575 | switch (protocol) { |
| 576 | default: |
| 577 | if (sp->state[IDX_LCP] == STATE_OPENED) { |
| 578 | uint16_t prot = htons(protocol); |
| 579 | sppp_cp_send(sp, PPP_LCP, PROTO_REJ, |
| 580 | ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, |
| 581 | &prot); |
| 582 | } |
| 583 | if (debug) |
| 584 | log(LOG_DEBUG, |
| 585 | "%s: invalid input protocol " |
| 586 | "<proto=0x%x>\n" , ifp->if_xname, ntohs(protocol)); |
| 587 | ++ifp->if_noproto; |
| 588 | goto drop; |
| 589 | case PPP_LCP: |
| 590 | sppp_cp_input(&lcp, sp, m); |
| 591 | m_freem(m); |
| 592 | return; |
| 593 | case PPP_PAP: |
| 594 | if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) |
| 595 | sppp_pap_input(sp, m); |
| 596 | m_freem(m); |
| 597 | return; |
| 598 | case PPP_CHAP: |
| 599 | if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) |
| 600 | sppp_chap_input(sp, m); |
| 601 | m_freem(m); |
| 602 | return; |
| 603 | #ifdef INET |
| 604 | case PPP_IPCP: |
| 605 | if (sp->pp_phase == SPPP_PHASE_NETWORK) |
| 606 | sppp_cp_input(&ipcp, sp, m); |
| 607 | m_freem(m); |
| 608 | return; |
| 609 | case PPP_IP: |
| 610 | if (sp->state[IDX_IPCP] == STATE_OPENED) { |
| 611 | sp->pp_last_activity = time_uptime; |
| 612 | pktq = ip_pktq; |
| 613 | } |
| 614 | break; |
| 615 | #endif |
| 616 | #ifdef INET6 |
| 617 | case PPP_IPV6CP: |
| 618 | if (sp->pp_phase == SPPP_PHASE_NETWORK) |
| 619 | sppp_cp_input(&ipv6cp, sp, m); |
| 620 | m_freem(m); |
| 621 | return; |
| 622 | |
| 623 | case PPP_IPV6: |
| 624 | if (sp->state[IDX_IPV6CP] == STATE_OPENED) { |
| 625 | sp->pp_last_activity = time_uptime; |
| 626 | pktq = ip6_pktq; |
| 627 | } |
| 628 | break; |
| 629 | #endif |
| 630 | } |
| 631 | |
| 632 | queue_pkt: |
| 633 | if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { |
| 634 | goto drop; |
| 635 | } |
| 636 | |
| 637 | /* Check queue. */ |
| 638 | if (__predict_true(pktq)) { |
| 639 | if (__predict_false(!pktq_enqueue(pktq, m, 0))) { |
| 640 | goto drop; |
| 641 | } |
| 642 | return; |
| 643 | } |
| 644 | |
| 645 | IFQ_LOCK(inq); |
| 646 | if (IF_QFULL(inq)) { |
| 647 | /* Queue overflow. */ |
| 648 | IF_DROP(inq); |
| 649 | IFQ_UNLOCK(inq); |
| 650 | if (debug) |
| 651 | log(LOG_DEBUG, "%s: protocol queue overflow\n" , |
| 652 | ifp->if_xname); |
| 653 | goto drop; |
| 654 | } |
| 655 | IF_ENQUEUE(inq, m); |
| 656 | IFQ_UNLOCK(inq); |
| 657 | schednetisr(isr); |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * Enqueue transmit packet. |
| 662 | */ |
| 663 | static int |
| 664 | sppp_output(struct ifnet *ifp, struct mbuf *m, |
| 665 | const struct sockaddr *dst, const struct rtentry *rt) |
| 666 | { |
| 667 | struct sppp *sp = (struct sppp *) ifp; |
| 668 | struct ppp_header *h = NULL; |
| 669 | struct ifqueue *ifq = NULL; /* XXX */ |
| 670 | int s, error = 0; |
| 671 | uint16_t protocol; |
| 672 | |
| 673 | s = splnet(); |
| 674 | |
| 675 | sp->pp_last_activity = time_uptime; |
| 676 | |
| 677 | if ((ifp->if_flags & IFF_UP) == 0 || |
| 678 | (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { |
| 679 | m_freem(m); |
| 680 | splx(s); |
| 681 | return (ENETDOWN); |
| 682 | } |
| 683 | |
| 684 | if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { |
| 685 | /* |
| 686 | * Interface is not yet running, but auto-dial. Need |
| 687 | * to start LCP for it. |
| 688 | */ |
| 689 | ifp->if_flags |= IFF_RUNNING; |
| 690 | splx(s); |
| 691 | lcp.Open(sp); |
| 692 | s = splnet(); |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * If the queueing discipline needs packet classification, |
| 697 | * do it before prepending link headers. |
| 698 | */ |
| 699 | IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); |
| 700 | |
| 701 | #ifdef INET |
| 702 | if (dst->sa_family == AF_INET) { |
| 703 | struct ip *ip = NULL; |
| 704 | struct tcphdr *th = NULL; |
| 705 | |
| 706 | if (m->m_len >= sizeof(struct ip)) { |
| 707 | ip = mtod(m, struct ip *); |
| 708 | if (ip->ip_p == IPPROTO_TCP && |
| 709 | m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + |
| 710 | sizeof(struct tcphdr)) { |
| 711 | th = (struct tcphdr *) |
| 712 | ((char *)ip + (ip->ip_hl << 2)); |
| 713 | } |
| 714 | } else |
| 715 | ip = NULL; |
| 716 | |
| 717 | /* |
| 718 | * When using dynamic local IP address assignment by using |
| 719 | * 0.0.0.0 as a local address, the first TCP session will |
| 720 | * not connect because the local TCP checksum is computed |
| 721 | * using 0.0.0.0 which will later become our real IP address |
| 722 | * so the TCP checksum computed at the remote end will |
| 723 | * become invalid. So we |
| 724 | * - don't let packets with src ip addr 0 thru |
| 725 | * - we flag TCP packets with src ip 0 as an error |
| 726 | */ |
| 727 | if (ip && ip->ip_src.s_addr == INADDR_ANY) { |
| 728 | uint8_t proto = ip->ip_p; |
| 729 | |
| 730 | m_freem(m); |
| 731 | splx(s); |
| 732 | if (proto == IPPROTO_TCP) |
| 733 | return (EADDRNOTAVAIL); |
| 734 | else |
| 735 | return (0); |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Put low delay, telnet, rlogin and ftp control packets |
| 740 | * in front of the queue. |
| 741 | */ |
| 742 | |
| 743 | if (!IF_QFULL(&sp->pp_fastq) && |
| 744 | ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || |
| 745 | (th && (INTERACTIVE(ntohs(th->th_sport)) || |
| 746 | INTERACTIVE(ntohs(th->th_dport)))))) |
| 747 | ifq = &sp->pp_fastq; |
| 748 | } |
| 749 | #endif |
| 750 | |
| 751 | #ifdef INET6 |
| 752 | if (dst->sa_family == AF_INET6) { |
| 753 | /* XXX do something tricky here? */ |
| 754 | } |
| 755 | #endif |
| 756 | |
| 757 | if ((sp->pp_flags & PP_NOFRAMING) == 0) { |
| 758 | /* |
| 759 | * Prepend general data packet PPP header. For now, IP only. |
| 760 | */ |
| 761 | M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); |
| 762 | if (! m) { |
| 763 | if (ifp->if_flags & IFF_DEBUG) |
| 764 | log(LOG_DEBUG, "%s: no memory for transmit header\n" , |
| 765 | ifp->if_xname); |
| 766 | ++ifp->if_oerrors; |
| 767 | splx(s); |
| 768 | return (ENOBUFS); |
| 769 | } |
| 770 | /* |
| 771 | * May want to check size of packet |
| 772 | * (albeit due to the implementation it's always enough) |
| 773 | */ |
| 774 | h = mtod(m, struct ppp_header *); |
| 775 | if (sp->pp_flags & PP_CISCO) { |
| 776 | h->address = CISCO_UNICAST; /* unicast address */ |
| 777 | h->control = 0; |
| 778 | } else { |
| 779 | h->address = PPP_ALLSTATIONS; /* broadcast address */ |
| 780 | h->control = PPP_UI; /* Unnumbered Info */ |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | switch (dst->sa_family) { |
| 785 | #ifdef INET |
| 786 | case AF_INET: /* Internet Protocol */ |
| 787 | if (sp->pp_flags & PP_CISCO) |
| 788 | protocol = htons(ETHERTYPE_IP); |
| 789 | else { |
| 790 | /* |
| 791 | * Don't choke with an ENETDOWN early. It's |
| 792 | * possible that we just started dialing out, |
| 793 | * so don't drop the packet immediately. If |
| 794 | * we notice that we run out of buffer space |
| 795 | * below, we will however remember that we are |
| 796 | * not ready to carry IP packets, and return |
| 797 | * ENETDOWN, as opposed to ENOBUFS. |
| 798 | */ |
| 799 | protocol = htons(PPP_IP); |
| 800 | if (sp->state[IDX_IPCP] != STATE_OPENED) |
| 801 | error = ENETDOWN; |
| 802 | } |
| 803 | break; |
| 804 | #endif |
| 805 | #ifdef INET6 |
| 806 | case AF_INET6: /* Internet Protocol version 6 */ |
| 807 | if (sp->pp_flags & PP_CISCO) |
| 808 | protocol = htons(ETHERTYPE_IPV6); |
| 809 | else { |
| 810 | /* |
| 811 | * Don't choke with an ENETDOWN early. It's |
| 812 | * possible that we just started dialing out, |
| 813 | * so don't drop the packet immediately. If |
| 814 | * we notice that we run out of buffer space |
| 815 | * below, we will however remember that we are |
| 816 | * not ready to carry IP packets, and return |
| 817 | * ENETDOWN, as opposed to ENOBUFS. |
| 818 | */ |
| 819 | protocol = htons(PPP_IPV6); |
| 820 | if (sp->state[IDX_IPV6CP] != STATE_OPENED) |
| 821 | error = ENETDOWN; |
| 822 | } |
| 823 | break; |
| 824 | #endif |
| 825 | default: |
| 826 | m_freem(m); |
| 827 | ++ifp->if_oerrors; |
| 828 | splx(s); |
| 829 | return (EAFNOSUPPORT); |
| 830 | } |
| 831 | |
| 832 | if (sp->pp_flags & PP_NOFRAMING) { |
| 833 | M_PREPEND(m, 2, M_DONTWAIT); |
| 834 | if (m == NULL) { |
| 835 | if (ifp->if_flags & IFF_DEBUG) |
| 836 | log(LOG_DEBUG, "%s: no memory for transmit header\n" , |
| 837 | ifp->if_xname); |
| 838 | ++ifp->if_oerrors; |
| 839 | splx(s); |
| 840 | return (ENOBUFS); |
| 841 | } |
| 842 | *mtod(m, uint16_t *) = protocol; |
| 843 | } else { |
| 844 | h->protocol = protocol; |
| 845 | } |
| 846 | |
| 847 | |
| 848 | error = ifq_enqueue2(ifp, ifq, m); |
| 849 | |
| 850 | if (error == 0) { |
| 851 | /* |
| 852 | * Count output packets and bytes. |
| 853 | * The packet length includes header + additional hardware |
| 854 | * framing according to RFC 1333. |
| 855 | */ |
| 856 | if (!(ifp->if_flags & IFF_OACTIVE)) |
| 857 | if_start_lock(ifp); |
| 858 | ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; |
| 859 | } |
| 860 | splx(s); |
| 861 | return error; |
| 862 | } |
| 863 | |
| 864 | static int |
| 865 | sppp_mediachange(struct ifnet *ifp) |
| 866 | { |
| 867 | |
| 868 | return (0); |
| 869 | } |
| 870 | |
| 871 | static void |
| 872 | sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) |
| 873 | { |
| 874 | |
| 875 | switch (ifp->if_link_state) { |
| 876 | case LINK_STATE_UP: |
| 877 | imr->ifm_status = IFM_AVALID | IFM_ACTIVE; |
| 878 | break; |
| 879 | case LINK_STATE_DOWN: |
| 880 | imr->ifm_status = IFM_AVALID; |
| 881 | break; |
| 882 | default: |
| 883 | /* Should be impossible as we set link state down in attach. */ |
| 884 | imr->ifm_status = 0; |
| 885 | break; |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | void |
| 890 | sppp_attach(struct ifnet *ifp) |
| 891 | { |
| 892 | struct sppp *sp = (struct sppp *) ifp; |
| 893 | |
| 894 | /* Initialize keepalive handler. */ |
| 895 | if (! spppq) { |
| 896 | callout_init(&keepalive_ch, 0); |
| 897 | callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); |
| 898 | } |
| 899 | |
| 900 | /* Insert new entry into the keepalive list. */ |
| 901 | sp->pp_next = spppq; |
| 902 | spppq = sp; |
| 903 | |
| 904 | sp->pp_if.if_type = IFT_PPP; |
| 905 | sp->pp_if.if_output = sppp_output; |
| 906 | sp->pp_fastq.ifq_maxlen = 32; |
| 907 | sp->pp_cpq.ifq_maxlen = 20; |
| 908 | sp->pp_loopcnt = 0; |
| 909 | sp->pp_alivecnt = 0; |
| 910 | sp->pp_last_activity = 0; |
| 911 | sp->pp_last_receive = 0; |
| 912 | sp->pp_maxalive = DEFAULT_MAXALIVECNT; |
| 913 | sp->pp_max_noreceive = DEFAULT_NORECV_TIME; |
| 914 | sp->pp_idle_timeout = 0; |
| 915 | memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); |
| 916 | memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); |
| 917 | sp->pp_auth_failures = 0; |
| 918 | sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; |
| 919 | sp->pp_phase = SPPP_PHASE_DEAD; |
| 920 | sp->pp_up = lcp.Up; |
| 921 | sp->pp_down = lcp.Down; |
| 922 | |
| 923 | if_alloc_sadl(ifp); |
| 924 | |
| 925 | /* Lets not beat about the bush, we know we're down. */ |
| 926 | ifp->if_link_state = LINK_STATE_DOWN; |
| 927 | /* There is no media for PPP, but it's needed to report link status. */ |
| 928 | ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); |
| 929 | |
| 930 | memset(&sp->myauth, 0, sizeof sp->myauth); |
| 931 | memset(&sp->hisauth, 0, sizeof sp->hisauth); |
| 932 | sppp_lcp_init(sp); |
| 933 | sppp_ipcp_init(sp); |
| 934 | sppp_ipv6cp_init(sp); |
| 935 | sppp_pap_init(sp); |
| 936 | sppp_chap_init(sp); |
| 937 | } |
| 938 | |
| 939 | void |
| 940 | sppp_detach(struct ifnet *ifp) |
| 941 | { |
| 942 | struct sppp **q, *p, *sp = (struct sppp *) ifp; |
| 943 | |
| 944 | /* Remove the entry from the keepalive list. */ |
| 945 | for (q = &spppq; (p = *q); q = &p->pp_next) |
| 946 | if (p == sp) { |
| 947 | *q = p->pp_next; |
| 948 | break; |
| 949 | } |
| 950 | |
| 951 | /* Stop keepalive handler. */ |
| 952 | if (! spppq) { |
| 953 | callout_stop(&keepalive_ch); |
| 954 | } |
| 955 | |
| 956 | callout_stop(&sp->ch[IDX_LCP]); |
| 957 | callout_stop(&sp->ch[IDX_IPCP]); |
| 958 | callout_stop(&sp->ch[IDX_PAP]); |
| 959 | callout_stop(&sp->ch[IDX_CHAP]); |
| 960 | #ifdef INET6 |
| 961 | callout_stop(&sp->ch[IDX_IPV6CP]); |
| 962 | #endif |
| 963 | callout_stop(&sp->pap_my_to_ch); |
| 964 | |
| 965 | /* free authentication info */ |
| 966 | if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); |
| 967 | if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); |
| 968 | if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); |
| 969 | if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); |
| 970 | |
| 971 | /* Safety - shouldn't be needed as there is no media to set. */ |
| 972 | ifmedia_delete_instance(&sp->pp_im, IFM_INST_ANY); |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * Flush the interface output queue. |
| 977 | */ |
| 978 | void |
| 979 | sppp_flush(struct ifnet *ifp) |
| 980 | { |
| 981 | struct sppp *sp = (struct sppp *) ifp; |
| 982 | |
| 983 | IFQ_PURGE(&sp->pp_if.if_snd); |
| 984 | IF_PURGE(&sp->pp_fastq); |
| 985 | IF_PURGE(&sp->pp_cpq); |
| 986 | } |
| 987 | |
| 988 | /* |
| 989 | * Check if the output queue is empty. |
| 990 | */ |
| 991 | int |
| 992 | sppp_isempty(struct ifnet *ifp) |
| 993 | { |
| 994 | struct sppp *sp = (struct sppp *) ifp; |
| 995 | int empty, s; |
| 996 | |
| 997 | s = splnet(); |
| 998 | empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && |
| 999 | IFQ_IS_EMPTY(&sp->pp_if.if_snd); |
| 1000 | splx(s); |
| 1001 | return (empty); |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Get next packet to send. |
| 1006 | */ |
| 1007 | struct mbuf * |
| 1008 | sppp_dequeue(struct ifnet *ifp) |
| 1009 | { |
| 1010 | struct sppp *sp = (struct sppp *) ifp; |
| 1011 | struct mbuf *m; |
| 1012 | int s; |
| 1013 | |
| 1014 | s = splnet(); |
| 1015 | /* |
| 1016 | * Process only the control protocol queue until we have at |
| 1017 | * least one NCP open. |
| 1018 | * |
| 1019 | * Do always serve all three queues in Cisco mode. |
| 1020 | */ |
| 1021 | IF_DEQUEUE(&sp->pp_cpq, m); |
| 1022 | if (m == NULL && |
| 1023 | (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { |
| 1024 | IF_DEQUEUE(&sp->pp_fastq, m); |
| 1025 | if (m == NULL) |
| 1026 | IFQ_DEQUEUE(&sp->pp_if.if_snd, m); |
| 1027 | } |
| 1028 | splx(s); |
| 1029 | return m; |
| 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * Process an ioctl request. Called on low priority level. |
| 1034 | */ |
| 1035 | int |
| 1036 | sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
| 1037 | { |
| 1038 | struct lwp *l = curlwp; /* XXX */ |
| 1039 | struct ifreq *ifr = (struct ifreq *) data; |
| 1040 | struct ifaddr *ifa = (struct ifaddr *) data; |
| 1041 | struct sppp *sp = (struct sppp *) ifp; |
| 1042 | int s, error=0, going_up, going_down, newmode; |
| 1043 | |
| 1044 | s = splnet(); |
| 1045 | switch (cmd) { |
| 1046 | case SIOCINITIFADDR: |
| 1047 | ifa->ifa_rtrequest = p2p_rtrequest; |
| 1048 | break; |
| 1049 | |
| 1050 | case SIOCSIFFLAGS: |
| 1051 | if ((error = ifioctl_common(ifp, cmd, data)) != 0) |
| 1052 | break; |
| 1053 | going_up = ifp->if_flags & IFF_UP && |
| 1054 | (ifp->if_flags & IFF_RUNNING) == 0; |
| 1055 | going_down = (ifp->if_flags & IFF_UP) == 0 && |
| 1056 | ifp->if_flags & IFF_RUNNING; |
| 1057 | newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); |
| 1058 | if (newmode == (IFF_AUTO | IFF_PASSIVE)) { |
| 1059 | /* sanity */ |
| 1060 | newmode = IFF_PASSIVE; |
| 1061 | ifp->if_flags &= ~IFF_AUTO; |
| 1062 | } |
| 1063 | |
| 1064 | if (going_up || going_down) |
| 1065 | lcp.Close(sp); |
| 1066 | if (going_up && newmode == 0) { |
| 1067 | /* neither auto-dial nor passive */ |
| 1068 | ifp->if_flags |= IFF_RUNNING; |
| 1069 | if (!(sp->pp_flags & PP_CISCO)) |
| 1070 | lcp.Open(sp); |
| 1071 | } else if (going_down) { |
| 1072 | sppp_flush(ifp); |
| 1073 | ifp->if_flags &= ~IFF_RUNNING; |
| 1074 | } |
| 1075 | |
| 1076 | break; |
| 1077 | |
| 1078 | case SIOCSIFMTU: |
| 1079 | if (ifr->ifr_mtu < PPP_MINMRU || |
| 1080 | ifr->ifr_mtu > sp->lcp.their_mru) { |
| 1081 | error = EINVAL; |
| 1082 | break; |
| 1083 | } |
| 1084 | /*FALLTHROUGH*/ |
| 1085 | case SIOCGIFMTU: |
| 1086 | if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) |
| 1087 | error = 0; |
| 1088 | break; |
| 1089 | case SIOCADDMULTI: |
| 1090 | case SIOCDELMULTI: |
| 1091 | break; |
| 1092 | |
| 1093 | case SPPPSETAUTHCFG: |
| 1094 | case SPPPSETLCPCFG: |
| 1095 | case SPPPSETIDLETO: |
| 1096 | case SPPPSETAUTHFAILURE: |
| 1097 | case SPPPSETDNSOPTS: |
| 1098 | case SPPPSETKEEPALIVE: |
| 1099 | #if defined(COMPAT_50) || defined(MODULAR) |
| 1100 | case __SPPPSETIDLETO50: |
| 1101 | case __SPPPSETKEEPALIVE50: |
| 1102 | #endif /* COMPAT_50 || MODULAR */ |
| 1103 | error = kauth_authorize_network(l->l_cred, |
| 1104 | KAUTH_NETWORK_INTERFACE, |
| 1105 | KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, |
| 1106 | NULL); |
| 1107 | if (error) |
| 1108 | break; |
| 1109 | error = sppp_params(sp, cmd, data); |
| 1110 | break; |
| 1111 | |
| 1112 | case SPPPGETAUTHCFG: |
| 1113 | case SPPPGETLCPCFG: |
| 1114 | case SPPPGETAUTHFAILURES: |
| 1115 | error = kauth_authorize_network(l->l_cred, |
| 1116 | KAUTH_NETWORK_INTERFACE, |
| 1117 | KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, |
| 1118 | NULL); |
| 1119 | if (error) |
| 1120 | break; |
| 1121 | error = sppp_params(sp, cmd, data); |
| 1122 | break; |
| 1123 | |
| 1124 | case SPPPGETSTATUS: |
| 1125 | case SPPPGETSTATUSNCP: |
| 1126 | case SPPPGETIDLETO: |
| 1127 | case SPPPGETDNSOPTS: |
| 1128 | case SPPPGETDNSADDRS: |
| 1129 | case SPPPGETKEEPALIVE: |
| 1130 | #if defined(COMPAT_50) || defined(MODULAR) |
| 1131 | case __SPPPGETIDLETO50: |
| 1132 | case __SPPPGETKEEPALIVE50: |
| 1133 | #endif /* COMPAT_50 || MODULAR */ |
| 1134 | error = sppp_params(sp, cmd, data); |
| 1135 | break; |
| 1136 | |
| 1137 | case SIOCGIFMEDIA: |
| 1138 | error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); |
| 1139 | break; |
| 1140 | |
| 1141 | default: |
| 1142 | error = ifioctl_common(ifp, cmd, data); |
| 1143 | break; |
| 1144 | } |
| 1145 | splx(s); |
| 1146 | return (error); |
| 1147 | } |
| 1148 | |
| 1149 | |
| 1150 | /* |
| 1151 | * Cisco framing implementation. |
| 1152 | */ |
| 1153 | |
| 1154 | /* |
| 1155 | * Handle incoming Cisco keepalive protocol packets. |
| 1156 | */ |
| 1157 | static void |
| 1158 | sppp_cisco_input(struct sppp *sp, struct mbuf *m) |
| 1159 | { |
| 1160 | STDDCL; |
| 1161 | struct cisco_packet *h; |
| 1162 | #ifdef INET |
| 1163 | uint32_t me, mymask = 0; /* XXX: GCC */ |
| 1164 | #endif |
| 1165 | |
| 1166 | if (m->m_pkthdr.len < CISCO_PACKET_LEN) { |
| 1167 | if (debug) |
| 1168 | log(LOG_DEBUG, |
| 1169 | "%s: cisco invalid packet length: %d bytes\n" , |
| 1170 | ifp->if_xname, m->m_pkthdr.len); |
| 1171 | return; |
| 1172 | } |
| 1173 | h = mtod(m, struct cisco_packet *); |
| 1174 | if (debug) |
| 1175 | log(LOG_DEBUG, |
| 1176 | "%s: cisco input: %d bytes " |
| 1177 | "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n" , |
| 1178 | ifp->if_xname, m->m_pkthdr.len, |
| 1179 | ntohl(h->type), h->par1, h->par2, (u_int)h->rel, |
| 1180 | (u_int)h->time0, (u_int)h->time1); |
| 1181 | switch (ntohl(h->type)) { |
| 1182 | default: |
| 1183 | if (debug) |
| 1184 | addlog("%s: cisco unknown packet type: 0x%x\n" , |
| 1185 | ifp->if_xname, ntohl(h->type)); |
| 1186 | break; |
| 1187 | case CISCO_ADDR_REPLY: |
| 1188 | /* Reply on address request, ignore */ |
| 1189 | break; |
| 1190 | case CISCO_KEEPALIVE_REQ: |
| 1191 | sp->pp_alivecnt = 0; |
| 1192 | sp->pp_rseq[IDX_LCP] = ntohl(h->par1); |
| 1193 | if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { |
| 1194 | /* Local and remote sequence numbers are equal. |
| 1195 | * Probably, the line is in loopback mode. */ |
| 1196 | if (sp->pp_loopcnt >= LOOPALIVECNT) { |
| 1197 | printf ("%s: loopback\n" , |
| 1198 | ifp->if_xname); |
| 1199 | sp->pp_loopcnt = 0; |
| 1200 | if (ifp->if_flags & IFF_UP) { |
| 1201 | if_down(ifp); |
| 1202 | IF_PURGE(&sp->pp_cpq); |
| 1203 | } |
| 1204 | } |
| 1205 | ++sp->pp_loopcnt; |
| 1206 | |
| 1207 | /* Generate new local sequence number */ |
| 1208 | sp->pp_seq[IDX_LCP] = cprng_fast32(); |
| 1209 | break; |
| 1210 | } |
| 1211 | sp->pp_loopcnt = 0; |
| 1212 | if (! (ifp->if_flags & IFF_UP) && |
| 1213 | (ifp->if_flags & IFF_RUNNING)) { |
| 1214 | if_up(ifp); |
| 1215 | } |
| 1216 | break; |
| 1217 | case CISCO_ADDR_REQ: |
| 1218 | #ifdef INET |
| 1219 | sppp_get_ip_addrs(sp, &me, 0, &mymask); |
| 1220 | if (me != 0L) |
| 1221 | sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); |
| 1222 | #endif |
| 1223 | break; |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | /* |
| 1228 | * Send Cisco keepalive packet. |
| 1229 | */ |
| 1230 | static void |
| 1231 | sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) |
| 1232 | { |
| 1233 | STDDCL; |
| 1234 | struct ppp_header *h; |
| 1235 | struct cisco_packet *ch; |
| 1236 | struct mbuf *m; |
| 1237 | uint32_t t; |
| 1238 | |
| 1239 | t = time_uptime * 1000; |
| 1240 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 1241 | if (! m) |
| 1242 | return; |
| 1243 | m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; |
| 1244 | m_reset_rcvif(m); |
| 1245 | |
| 1246 | h = mtod(m, struct ppp_header *); |
| 1247 | h->address = CISCO_MULTICAST; |
| 1248 | h->control = 0; |
| 1249 | h->protocol = htons(CISCO_KEEPALIVE); |
| 1250 | |
| 1251 | ch = (struct cisco_packet *)(h + 1); |
| 1252 | ch->type = htonl(type); |
| 1253 | ch->par1 = htonl(par1); |
| 1254 | ch->par2 = htonl(par2); |
| 1255 | ch->rel = -1; |
| 1256 | |
| 1257 | ch->time0 = htons((u_short)(t >> 16)); |
| 1258 | ch->time1 = htons((u_short) t); |
| 1259 | |
| 1260 | if (debug) |
| 1261 | log(LOG_DEBUG, |
| 1262 | "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n" , |
| 1263 | ifp->if_xname, ntohl(ch->type), ch->par1, |
| 1264 | ch->par2, (u_int)ch->rel, (u_int)ch->time0, |
| 1265 | (u_int)ch->time1); |
| 1266 | |
| 1267 | if (IF_QFULL(&sp->pp_cpq)) { |
| 1268 | IF_DROP(&sp->pp_fastq); |
| 1269 | IF_DROP(&ifp->if_snd); |
| 1270 | m_freem(m); |
| 1271 | ++ifp->if_oerrors; |
| 1272 | return; |
| 1273 | } else |
| 1274 | IF_ENQUEUE(&sp->pp_cpq, m); |
| 1275 | if (! (ifp->if_flags & IFF_OACTIVE)) |
| 1276 | if_start_lock(ifp); |
| 1277 | ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; |
| 1278 | } |
| 1279 | |
| 1280 | /* |
| 1281 | * PPP protocol implementation. |
| 1282 | */ |
| 1283 | |
| 1284 | /* |
| 1285 | * Send PPP control protocol packet. |
| 1286 | */ |
| 1287 | static void |
| 1288 | sppp_cp_send(struct sppp *sp, u_short proto, u_char type, |
| 1289 | u_char ident, u_short len, void *data) |
| 1290 | { |
| 1291 | STDDCL; |
| 1292 | struct lcp_header *lh; |
| 1293 | struct mbuf *m; |
| 1294 | size_t pkthdrlen; |
| 1295 | |
| 1296 | pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; |
| 1297 | |
| 1298 | if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) |
| 1299 | len = MHLEN - pkthdrlen - LCP_HEADER_LEN; |
| 1300 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 1301 | if (! m) |
| 1302 | return; |
| 1303 | m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; |
| 1304 | m_reset_rcvif(m); |
| 1305 | |
| 1306 | if (sp->pp_flags & PP_NOFRAMING) { |
| 1307 | *mtod(m, uint16_t *) = htons(proto); |
| 1308 | lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); |
| 1309 | } else { |
| 1310 | struct ppp_header *h; |
| 1311 | h = mtod(m, struct ppp_header *); |
| 1312 | h->address = PPP_ALLSTATIONS; /* broadcast address */ |
| 1313 | h->control = PPP_UI; /* Unnumbered Info */ |
| 1314 | h->protocol = htons(proto); /* Link Control Protocol */ |
| 1315 | lh = (struct lcp_header *)(h + 1); |
| 1316 | } |
| 1317 | lh->type = type; |
| 1318 | lh->ident = ident; |
| 1319 | lh->len = htons(LCP_HEADER_LEN + len); |
| 1320 | if (len) |
| 1321 | memcpy(lh + 1, data, len); |
| 1322 | |
| 1323 | if (debug) { |
| 1324 | log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d" , |
| 1325 | ifp->if_xname, |
| 1326 | sppp_proto_name(proto), |
| 1327 | sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); |
| 1328 | if (len) |
| 1329 | sppp_print_bytes((u_char *)(lh + 1), len); |
| 1330 | addlog(">\n" ); |
| 1331 | } |
| 1332 | if (IF_QFULL(&sp->pp_cpq)) { |
| 1333 | IF_DROP(&sp->pp_fastq); |
| 1334 | IF_DROP(&ifp->if_snd); |
| 1335 | m_freem(m); |
| 1336 | ++ifp->if_oerrors; |
| 1337 | return; |
| 1338 | } else |
| 1339 | IF_ENQUEUE(&sp->pp_cpq, m); |
| 1340 | if (! (ifp->if_flags & IFF_OACTIVE)) |
| 1341 | if_start_lock(ifp); |
| 1342 | ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; |
| 1343 | } |
| 1344 | |
| 1345 | /* |
| 1346 | * Handle incoming PPP control protocol packets. |
| 1347 | */ |
| 1348 | static void |
| 1349 | sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) |
| 1350 | { |
| 1351 | STDDCL; |
| 1352 | struct lcp_header *h; |
| 1353 | int printlen, len = m->m_pkthdr.len; |
| 1354 | int rv; |
| 1355 | u_char *p; |
| 1356 | uint32_t u32; |
| 1357 | |
| 1358 | if (len < 4) { |
| 1359 | if (debug) |
| 1360 | log(LOG_DEBUG, |
| 1361 | "%s: %s invalid packet length: %d bytes\n" , |
| 1362 | ifp->if_xname, cp->name, len); |
| 1363 | return; |
| 1364 | } |
| 1365 | h = mtod(m, struct lcp_header *); |
| 1366 | if (debug) { |
| 1367 | printlen = ntohs(h->len); |
| 1368 | log(LOG_DEBUG, |
| 1369 | "%s: %s input(%s): <%s id=0x%x len=%d" , |
| 1370 | ifp->if_xname, cp->name, |
| 1371 | sppp_state_name(sp->state[cp->protoidx]), |
| 1372 | sppp_cp_type_name(h->type), h->ident, printlen); |
| 1373 | if (len < printlen) |
| 1374 | printlen = len; |
| 1375 | if (printlen > 4) |
| 1376 | sppp_print_bytes((u_char *)(h + 1), printlen - 4); |
| 1377 | addlog(">\n" ); |
| 1378 | } |
| 1379 | if (len > ntohs(h->len)) |
| 1380 | len = ntohs(h->len); |
| 1381 | p = (u_char *)(h + 1); |
| 1382 | switch (h->type) { |
| 1383 | case CONF_REQ: |
| 1384 | if (len < 4) { |
| 1385 | if (debug) |
| 1386 | addlog("%s: %s invalid conf-req length %d\n" , |
| 1387 | ifp->if_xname, cp->name, |
| 1388 | len); |
| 1389 | ++ifp->if_ierrors; |
| 1390 | break; |
| 1391 | } |
| 1392 | /* handle states where RCR doesn't get a SCA/SCN */ |
| 1393 | switch (sp->state[cp->protoidx]) { |
| 1394 | case STATE_CLOSING: |
| 1395 | case STATE_STOPPING: |
| 1396 | return; |
| 1397 | case STATE_CLOSED: |
| 1398 | sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, |
| 1399 | 0, 0); |
| 1400 | return; |
| 1401 | } |
| 1402 | rv = (cp->RCR)(sp, h, len); |
| 1403 | if (rv < 0) { |
| 1404 | /* fatal error, shut down */ |
| 1405 | (cp->tld)(sp); |
| 1406 | sppp_lcp_tlf(sp); |
| 1407 | return; |
| 1408 | } |
| 1409 | switch (sp->state[cp->protoidx]) { |
| 1410 | case STATE_OPENED: |
| 1411 | (cp->tld)(sp); |
| 1412 | (cp->scr)(sp); |
| 1413 | /* fall through... */ |
| 1414 | case STATE_ACK_SENT: |
| 1415 | case STATE_REQ_SENT: |
| 1416 | sppp_cp_change_state(cp, sp, rv? |
| 1417 | STATE_ACK_SENT: STATE_REQ_SENT); |
| 1418 | break; |
| 1419 | case STATE_STOPPED: |
| 1420 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1421 | (cp->scr)(sp); |
| 1422 | sppp_cp_change_state(cp, sp, rv? |
| 1423 | STATE_ACK_SENT: STATE_REQ_SENT); |
| 1424 | break; |
| 1425 | case STATE_ACK_RCVD: |
| 1426 | if (rv) { |
| 1427 | sppp_cp_change_state(cp, sp, STATE_OPENED); |
| 1428 | if (debug) |
| 1429 | log(LOG_DEBUG, "%s: %s tlu\n" , |
| 1430 | ifp->if_xname, |
| 1431 | cp->name); |
| 1432 | (cp->tlu)(sp); |
| 1433 | } else |
| 1434 | sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); |
| 1435 | break; |
| 1436 | default: |
| 1437 | printf("%s: %s illegal %s in state %s\n" , |
| 1438 | ifp->if_xname, cp->name, |
| 1439 | sppp_cp_type_name(h->type), |
| 1440 | sppp_state_name(sp->state[cp->protoidx])); |
| 1441 | ++ifp->if_ierrors; |
| 1442 | } |
| 1443 | break; |
| 1444 | case CONF_ACK: |
| 1445 | if (h->ident != sp->confid[cp->protoidx]) { |
| 1446 | if (debug) |
| 1447 | addlog("%s: %s id mismatch 0x%x != 0x%x\n" , |
| 1448 | ifp->if_xname, cp->name, |
| 1449 | h->ident, sp->confid[cp->protoidx]); |
| 1450 | ++ifp->if_ierrors; |
| 1451 | break; |
| 1452 | } |
| 1453 | switch (sp->state[cp->protoidx]) { |
| 1454 | case STATE_CLOSED: |
| 1455 | case STATE_STOPPED: |
| 1456 | sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); |
| 1457 | break; |
| 1458 | case STATE_CLOSING: |
| 1459 | case STATE_STOPPING: |
| 1460 | break; |
| 1461 | case STATE_REQ_SENT: |
| 1462 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1463 | sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); |
| 1464 | break; |
| 1465 | case STATE_OPENED: |
| 1466 | (cp->tld)(sp); |
| 1467 | /* fall through */ |
| 1468 | case STATE_ACK_RCVD: |
| 1469 | (cp->scr)(sp); |
| 1470 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1471 | break; |
| 1472 | case STATE_ACK_SENT: |
| 1473 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1474 | sppp_cp_change_state(cp, sp, STATE_OPENED); |
| 1475 | if (debug) |
| 1476 | log(LOG_DEBUG, "%s: %s tlu\n" , |
| 1477 | ifp->if_xname, cp->name); |
| 1478 | (cp->tlu)(sp); |
| 1479 | break; |
| 1480 | default: |
| 1481 | printf("%s: %s illegal %s in state %s\n" , |
| 1482 | ifp->if_xname, cp->name, |
| 1483 | sppp_cp_type_name(h->type), |
| 1484 | sppp_state_name(sp->state[cp->protoidx])); |
| 1485 | ++ifp->if_ierrors; |
| 1486 | } |
| 1487 | break; |
| 1488 | case CONF_NAK: |
| 1489 | case CONF_REJ: |
| 1490 | if (h->ident != sp->confid[cp->protoidx]) { |
| 1491 | if (debug) |
| 1492 | addlog("%s: %s id mismatch 0x%x != 0x%x\n" , |
| 1493 | ifp->if_xname, cp->name, |
| 1494 | h->ident, sp->confid[cp->protoidx]); |
| 1495 | ++ifp->if_ierrors; |
| 1496 | break; |
| 1497 | } |
| 1498 | if (h->type == CONF_NAK) |
| 1499 | (cp->RCN_nak)(sp, h, len); |
| 1500 | else /* CONF_REJ */ |
| 1501 | (cp->RCN_rej)(sp, h, len); |
| 1502 | |
| 1503 | switch (sp->state[cp->protoidx]) { |
| 1504 | case STATE_CLOSED: |
| 1505 | case STATE_STOPPED: |
| 1506 | sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); |
| 1507 | break; |
| 1508 | case STATE_REQ_SENT: |
| 1509 | case STATE_ACK_SENT: |
| 1510 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1511 | (cp->scr)(sp); |
| 1512 | break; |
| 1513 | case STATE_OPENED: |
| 1514 | (cp->tld)(sp); |
| 1515 | /* fall through */ |
| 1516 | case STATE_ACK_RCVD: |
| 1517 | sppp_cp_change_state(cp, sp, STATE_ACK_SENT); |
| 1518 | (cp->scr)(sp); |
| 1519 | break; |
| 1520 | case STATE_CLOSING: |
| 1521 | case STATE_STOPPING: |
| 1522 | break; |
| 1523 | default: |
| 1524 | printf("%s: %s illegal %s in state %s\n" , |
| 1525 | ifp->if_xname, cp->name, |
| 1526 | sppp_cp_type_name(h->type), |
| 1527 | sppp_state_name(sp->state[cp->protoidx])); |
| 1528 | ++ifp->if_ierrors; |
| 1529 | } |
| 1530 | break; |
| 1531 | |
| 1532 | case TERM_REQ: |
| 1533 | switch (sp->state[cp->protoidx]) { |
| 1534 | case STATE_ACK_RCVD: |
| 1535 | case STATE_ACK_SENT: |
| 1536 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1537 | /* fall through */ |
| 1538 | case STATE_CLOSED: |
| 1539 | case STATE_STOPPED: |
| 1540 | case STATE_CLOSING: |
| 1541 | case STATE_STOPPING: |
| 1542 | case STATE_REQ_SENT: |
| 1543 | sta: |
| 1544 | /* Send Terminate-Ack packet. */ |
| 1545 | if (debug) |
| 1546 | log(LOG_DEBUG, "%s: %s send terminate-ack\n" , |
| 1547 | ifp->if_xname, cp->name); |
| 1548 | sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); |
| 1549 | break; |
| 1550 | case STATE_OPENED: |
| 1551 | (cp->tld)(sp); |
| 1552 | sp->rst_counter[cp->protoidx] = 0; |
| 1553 | sppp_cp_change_state(cp, sp, STATE_STOPPING); |
| 1554 | goto sta; |
| 1555 | default: |
| 1556 | printf("%s: %s illegal %s in state %s\n" , |
| 1557 | ifp->if_xname, cp->name, |
| 1558 | sppp_cp_type_name(h->type), |
| 1559 | sppp_state_name(sp->state[cp->protoidx])); |
| 1560 | ++ifp->if_ierrors; |
| 1561 | } |
| 1562 | break; |
| 1563 | case TERM_ACK: |
| 1564 | switch (sp->state[cp->protoidx]) { |
| 1565 | case STATE_CLOSED: |
| 1566 | case STATE_STOPPED: |
| 1567 | case STATE_REQ_SENT: |
| 1568 | case STATE_ACK_SENT: |
| 1569 | break; |
| 1570 | case STATE_CLOSING: |
| 1571 | (cp->tlf)(sp); |
| 1572 | sppp_cp_change_state(cp, sp, STATE_CLOSED); |
| 1573 | sppp_lcp_check_and_close(sp); |
| 1574 | break; |
| 1575 | case STATE_STOPPING: |
| 1576 | (cp->tlf)(sp); |
| 1577 | sppp_cp_change_state(cp, sp, STATE_STOPPED); |
| 1578 | sppp_lcp_check_and_close(sp); |
| 1579 | break; |
| 1580 | case STATE_ACK_RCVD: |
| 1581 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1582 | break; |
| 1583 | case STATE_OPENED: |
| 1584 | (cp->tld)(sp); |
| 1585 | (cp->scr)(sp); |
| 1586 | sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); |
| 1587 | break; |
| 1588 | default: |
| 1589 | printf("%s: %s illegal %s in state %s\n" , |
| 1590 | ifp->if_xname, cp->name, |
| 1591 | sppp_cp_type_name(h->type), |
| 1592 | sppp_state_name(sp->state[cp->protoidx])); |
| 1593 | ++ifp->if_ierrors; |
| 1594 | } |
| 1595 | break; |
| 1596 | case CODE_REJ: |
| 1597 | /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ |
| 1598 | log(LOG_INFO, |
| 1599 | "%s: %s: ignoring RXJ (%s) for code ?, " |
| 1600 | "danger will robinson\n" , |
| 1601 | ifp->if_xname, cp->name, |
| 1602 | sppp_cp_type_name(h->type)); |
| 1603 | switch (sp->state[cp->protoidx]) { |
| 1604 | case STATE_CLOSED: |
| 1605 | case STATE_STOPPED: |
| 1606 | case STATE_REQ_SENT: |
| 1607 | case STATE_ACK_SENT: |
| 1608 | case STATE_CLOSING: |
| 1609 | case STATE_STOPPING: |
| 1610 | case STATE_OPENED: |
| 1611 | break; |
| 1612 | case STATE_ACK_RCVD: |
| 1613 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1614 | break; |
| 1615 | default: |
| 1616 | printf("%s: %s illegal %s in state %s\n" , |
| 1617 | ifp->if_xname, cp->name, |
| 1618 | sppp_cp_type_name(h->type), |
| 1619 | sppp_state_name(sp->state[cp->protoidx])); |
| 1620 | ++ifp->if_ierrors; |
| 1621 | } |
| 1622 | break; |
| 1623 | case PROTO_REJ: |
| 1624 | { |
| 1625 | int catastrophic; |
| 1626 | const struct cp *upper; |
| 1627 | int i; |
| 1628 | uint16_t proto; |
| 1629 | |
| 1630 | catastrophic = 0; |
| 1631 | upper = NULL; |
| 1632 | proto = p[0] << 8 | p[1]; |
| 1633 | for (i = 0; i < IDX_COUNT; i++) { |
| 1634 | if (cps[i]->proto == proto) { |
| 1635 | upper = cps[i]; |
| 1636 | break; |
| 1637 | } |
| 1638 | } |
| 1639 | if (upper == NULL) |
| 1640 | catastrophic++; |
| 1641 | |
| 1642 | if (debug) |
| 1643 | log(LOG_INFO, |
| 1644 | "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n" , |
| 1645 | ifp->if_xname, cp->name, catastrophic ? '-' : '+', |
| 1646 | sppp_cp_type_name(h->type), proto, |
| 1647 | upper ? upper->name : "unknown" , |
| 1648 | upper ? sppp_state_name(sp->state[upper->protoidx]) : "?" ); |
| 1649 | |
| 1650 | /* |
| 1651 | * if we got RXJ+ against conf-req, the peer does not implement |
| 1652 | * this particular protocol type. terminate the protocol. |
| 1653 | */ |
| 1654 | if (upper && !catastrophic) { |
| 1655 | if (sp->state[upper->protoidx] == STATE_REQ_SENT) { |
| 1656 | upper->Close(sp); |
| 1657 | break; |
| 1658 | } |
| 1659 | } |
| 1660 | |
| 1661 | /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ |
| 1662 | switch (sp->state[cp->protoidx]) { |
| 1663 | case STATE_CLOSED: |
| 1664 | case STATE_STOPPED: |
| 1665 | case STATE_REQ_SENT: |
| 1666 | case STATE_ACK_SENT: |
| 1667 | case STATE_CLOSING: |
| 1668 | case STATE_STOPPING: |
| 1669 | case STATE_OPENED: |
| 1670 | break; |
| 1671 | case STATE_ACK_RCVD: |
| 1672 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1673 | break; |
| 1674 | default: |
| 1675 | printf("%s: %s illegal %s in state %s\n" , |
| 1676 | ifp->if_xname, cp->name, |
| 1677 | sppp_cp_type_name(h->type), |
| 1678 | sppp_state_name(sp->state[cp->protoidx])); |
| 1679 | ++ifp->if_ierrors; |
| 1680 | } |
| 1681 | break; |
| 1682 | } |
| 1683 | case DISC_REQ: |
| 1684 | if (cp->proto != PPP_LCP) |
| 1685 | goto illegal; |
| 1686 | /* Discard the packet. */ |
| 1687 | break; |
| 1688 | case ECHO_REQ: |
| 1689 | if (cp->proto != PPP_LCP) |
| 1690 | goto illegal; |
| 1691 | if (sp->state[cp->protoidx] != STATE_OPENED) { |
| 1692 | if (debug) |
| 1693 | addlog("%s: lcp echo req but lcp closed\n" , |
| 1694 | ifp->if_xname); |
| 1695 | ++ifp->if_ierrors; |
| 1696 | break; |
| 1697 | } |
| 1698 | if (len < 8) { |
| 1699 | if (debug) |
| 1700 | addlog("%s: invalid lcp echo request " |
| 1701 | "packet length: %d bytes\n" , |
| 1702 | ifp->if_xname, len); |
| 1703 | break; |
| 1704 | } |
| 1705 | memcpy(&u32, h + 1, sizeof u32); |
| 1706 | if (ntohl(u32) == sp->lcp.magic) { |
| 1707 | /* Line loopback mode detected. */ |
| 1708 | printf("%s: loopback\n" , ifp->if_xname); |
| 1709 | if_down(ifp); |
| 1710 | IF_PURGE(&sp->pp_cpq); |
| 1711 | |
| 1712 | /* Shut down the PPP link. */ |
| 1713 | /* XXX */ |
| 1714 | lcp.Down(sp); |
| 1715 | lcp.Up(sp); |
| 1716 | break; |
| 1717 | } |
| 1718 | u32 = htonl(sp->lcp.magic); |
| 1719 | memcpy(h + 1, &u32, sizeof u32); |
| 1720 | if (debug) |
| 1721 | addlog("%s: got lcp echo req, sending echo rep\n" , |
| 1722 | ifp->if_xname); |
| 1723 | sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, |
| 1724 | h + 1); |
| 1725 | break; |
| 1726 | case ECHO_REPLY: |
| 1727 | if (cp->proto != PPP_LCP) |
| 1728 | goto illegal; |
| 1729 | if (h->ident != sp->lcp.echoid) { |
| 1730 | ++ifp->if_ierrors; |
| 1731 | break; |
| 1732 | } |
| 1733 | if (len < 8) { |
| 1734 | if (debug) |
| 1735 | addlog("%s: lcp invalid echo reply " |
| 1736 | "packet length: %d bytes\n" , |
| 1737 | ifp->if_xname, len); |
| 1738 | break; |
| 1739 | } |
| 1740 | if (debug) |
| 1741 | addlog("%s: lcp got echo rep\n" , |
| 1742 | ifp->if_xname); |
| 1743 | memcpy(&u32, h + 1, sizeof u32); |
| 1744 | if (ntohl(u32) != sp->lcp.magic) |
| 1745 | sp->pp_alivecnt = 0; |
| 1746 | break; |
| 1747 | default: |
| 1748 | /* Unknown packet type -- send Code-Reject packet. */ |
| 1749 | illegal: |
| 1750 | if (debug) |
| 1751 | addlog("%s: %s send code-rej for 0x%x\n" , |
| 1752 | ifp->if_xname, cp->name, h->type); |
| 1753 | sppp_cp_send(sp, cp->proto, CODE_REJ, |
| 1754 | ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); |
| 1755 | ++ifp->if_ierrors; |
| 1756 | } |
| 1757 | } |
| 1758 | |
| 1759 | |
| 1760 | /* |
| 1761 | * The generic part of all Up/Down/Open/Close/TO event handlers. |
| 1762 | * Basically, the state transition handling in the automaton. |
| 1763 | */ |
| 1764 | static void |
| 1765 | sppp_up_event(const struct cp *cp, struct sppp *sp) |
| 1766 | { |
| 1767 | STDDCL; |
| 1768 | |
| 1769 | if (debug) |
| 1770 | log(LOG_DEBUG, "%s: %s up(%s)\n" , |
| 1771 | ifp->if_xname, cp->name, |
| 1772 | sppp_state_name(sp->state[cp->protoidx])); |
| 1773 | |
| 1774 | switch (sp->state[cp->protoidx]) { |
| 1775 | case STATE_INITIAL: |
| 1776 | sppp_cp_change_state(cp, sp, STATE_CLOSED); |
| 1777 | break; |
| 1778 | case STATE_STARTING: |
| 1779 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1780 | (cp->scr)(sp); |
| 1781 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1782 | break; |
| 1783 | default: |
| 1784 | printf("%s: %s illegal up in state %s\n" , |
| 1785 | ifp->if_xname, cp->name, |
| 1786 | sppp_state_name(sp->state[cp->protoidx])); |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | static void |
| 1791 | sppp_down_event(const struct cp *cp, struct sppp *sp) |
| 1792 | { |
| 1793 | STDDCL; |
| 1794 | |
| 1795 | if (debug) |
| 1796 | log(LOG_DEBUG, "%s: %s down(%s)\n" , |
| 1797 | ifp->if_xname, cp->name, |
| 1798 | sppp_state_name(sp->state[cp->protoidx])); |
| 1799 | |
| 1800 | switch (sp->state[cp->protoidx]) { |
| 1801 | case STATE_CLOSED: |
| 1802 | case STATE_CLOSING: |
| 1803 | sppp_cp_change_state(cp, sp, STATE_INITIAL); |
| 1804 | break; |
| 1805 | case STATE_STOPPED: |
| 1806 | (cp->tls)(sp); |
| 1807 | /* fall through */ |
| 1808 | case STATE_STOPPING: |
| 1809 | case STATE_REQ_SENT: |
| 1810 | case STATE_ACK_RCVD: |
| 1811 | case STATE_ACK_SENT: |
| 1812 | sppp_cp_change_state(cp, sp, STATE_STARTING); |
| 1813 | break; |
| 1814 | case STATE_OPENED: |
| 1815 | (cp->tld)(sp); |
| 1816 | sppp_cp_change_state(cp, sp, STATE_STARTING); |
| 1817 | break; |
| 1818 | default: |
| 1819 | printf("%s: %s illegal down in state %s\n" , |
| 1820 | ifp->if_xname, cp->name, |
| 1821 | sppp_state_name(sp->state[cp->protoidx])); |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | |
| 1826 | static void |
| 1827 | sppp_open_event(const struct cp *cp, struct sppp *sp) |
| 1828 | { |
| 1829 | STDDCL; |
| 1830 | |
| 1831 | if (debug) |
| 1832 | log(LOG_DEBUG, "%s: %s open(%s)\n" , |
| 1833 | ifp->if_xname, cp->name, |
| 1834 | sppp_state_name(sp->state[cp->protoidx])); |
| 1835 | |
| 1836 | switch (sp->state[cp->protoidx]) { |
| 1837 | case STATE_INITIAL: |
| 1838 | sppp_cp_change_state(cp, sp, STATE_STARTING); |
| 1839 | (cp->tls)(sp); |
| 1840 | break; |
| 1841 | case STATE_STARTING: |
| 1842 | break; |
| 1843 | case STATE_CLOSED: |
| 1844 | sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; |
| 1845 | (cp->scr)(sp); |
| 1846 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1847 | break; |
| 1848 | case STATE_STOPPED: |
| 1849 | case STATE_STOPPING: |
| 1850 | case STATE_REQ_SENT: |
| 1851 | case STATE_ACK_RCVD: |
| 1852 | case STATE_ACK_SENT: |
| 1853 | case STATE_OPENED: |
| 1854 | break; |
| 1855 | case STATE_CLOSING: |
| 1856 | sppp_cp_change_state(cp, sp, STATE_STOPPING); |
| 1857 | break; |
| 1858 | } |
| 1859 | } |
| 1860 | |
| 1861 | |
| 1862 | static void |
| 1863 | sppp_close_event(const struct cp *cp, struct sppp *sp) |
| 1864 | { |
| 1865 | STDDCL; |
| 1866 | |
| 1867 | if (debug) |
| 1868 | log(LOG_DEBUG, "%s: %s close(%s)\n" , |
| 1869 | ifp->if_xname, cp->name, |
| 1870 | sppp_state_name(sp->state[cp->protoidx])); |
| 1871 | |
| 1872 | switch (sp->state[cp->protoidx]) { |
| 1873 | case STATE_INITIAL: |
| 1874 | case STATE_CLOSED: |
| 1875 | case STATE_CLOSING: |
| 1876 | break; |
| 1877 | case STATE_STARTING: |
| 1878 | sppp_cp_change_state(cp, sp, STATE_INITIAL); |
| 1879 | (cp->tlf)(sp); |
| 1880 | break; |
| 1881 | case STATE_STOPPED: |
| 1882 | sppp_cp_change_state(cp, sp, STATE_CLOSED); |
| 1883 | break; |
| 1884 | case STATE_STOPPING: |
| 1885 | sppp_cp_change_state(cp, sp, STATE_CLOSING); |
| 1886 | break; |
| 1887 | case STATE_OPENED: |
| 1888 | (cp->tld)(sp); |
| 1889 | /* fall through */ |
| 1890 | case STATE_REQ_SENT: |
| 1891 | case STATE_ACK_RCVD: |
| 1892 | case STATE_ACK_SENT: |
| 1893 | sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; |
| 1894 | sppp_cp_send(sp, cp->proto, TERM_REQ, |
| 1895 | ++sp->pp_seq[cp->protoidx], 0, 0); |
| 1896 | sppp_cp_change_state(cp, sp, STATE_CLOSING); |
| 1897 | break; |
| 1898 | } |
| 1899 | } |
| 1900 | |
| 1901 | static void |
| 1902 | sppp_to_event(const struct cp *cp, struct sppp *sp) |
| 1903 | { |
| 1904 | STDDCL; |
| 1905 | int s; |
| 1906 | |
| 1907 | s = splnet(); |
| 1908 | if (debug) |
| 1909 | log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n" , |
| 1910 | ifp->if_xname, cp->name, |
| 1911 | sppp_state_name(sp->state[cp->protoidx]), |
| 1912 | sp->rst_counter[cp->protoidx]); |
| 1913 | |
| 1914 | if (--sp->rst_counter[cp->protoidx] < 0) |
| 1915 | /* TO- event */ |
| 1916 | switch (sp->state[cp->protoidx]) { |
| 1917 | case STATE_CLOSING: |
| 1918 | (cp->tlf)(sp); |
| 1919 | sppp_cp_change_state(cp, sp, STATE_CLOSED); |
| 1920 | sppp_lcp_check_and_close(sp); |
| 1921 | break; |
| 1922 | case STATE_STOPPING: |
| 1923 | (cp->tlf)(sp); |
| 1924 | sppp_cp_change_state(cp, sp, STATE_STOPPED); |
| 1925 | sppp_lcp_check_and_close(sp); |
| 1926 | break; |
| 1927 | case STATE_REQ_SENT: |
| 1928 | case STATE_ACK_RCVD: |
| 1929 | case STATE_ACK_SENT: |
| 1930 | (cp->tlf)(sp); |
| 1931 | sppp_cp_change_state(cp, sp, STATE_STOPPED); |
| 1932 | sppp_lcp_check_and_close(sp); |
| 1933 | break; |
| 1934 | } |
| 1935 | else |
| 1936 | /* TO+ event */ |
| 1937 | switch (sp->state[cp->protoidx]) { |
| 1938 | case STATE_CLOSING: |
| 1939 | case STATE_STOPPING: |
| 1940 | sppp_cp_send(sp, cp->proto, TERM_REQ, |
| 1941 | ++sp->pp_seq[cp->protoidx], 0, 0); |
| 1942 | callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, |
| 1943 | cp->TO, sp); |
| 1944 | break; |
| 1945 | case STATE_REQ_SENT: |
| 1946 | case STATE_ACK_RCVD: |
| 1947 | (cp->scr)(sp); |
| 1948 | /* sppp_cp_change_state() will restart the timer */ |
| 1949 | sppp_cp_change_state(cp, sp, STATE_REQ_SENT); |
| 1950 | break; |
| 1951 | case STATE_ACK_SENT: |
| 1952 | (cp->scr)(sp); |
| 1953 | callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, |
| 1954 | cp->TO, sp); |
| 1955 | break; |
| 1956 | } |
| 1957 | |
| 1958 | splx(s); |
| 1959 | } |
| 1960 | |
| 1961 | /* |
| 1962 | * Change the state of a control protocol in the state automaton. |
| 1963 | * Takes care of starting/stopping the restart timer. |
| 1964 | */ |
| 1965 | void |
| 1966 | sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) |
| 1967 | { |
| 1968 | sp->state[cp->protoidx] = newstate; |
| 1969 | callout_stop(&sp->ch[cp->protoidx]); |
| 1970 | switch (newstate) { |
| 1971 | case STATE_INITIAL: |
| 1972 | case STATE_STARTING: |
| 1973 | case STATE_CLOSED: |
| 1974 | case STATE_STOPPED: |
| 1975 | case STATE_OPENED: |
| 1976 | break; |
| 1977 | case STATE_CLOSING: |
| 1978 | case STATE_STOPPING: |
| 1979 | case STATE_REQ_SENT: |
| 1980 | case STATE_ACK_RCVD: |
| 1981 | case STATE_ACK_SENT: |
| 1982 | callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, |
| 1983 | cp->TO, sp); |
| 1984 | break; |
| 1985 | } |
| 1986 | } |
| 1987 | |
| 1988 | /* |
| 1989 | *--------------------------------------------------------------------------* |
| 1990 | * * |
| 1991 | * The LCP implementation. * |
| 1992 | * * |
| 1993 | *--------------------------------------------------------------------------* |
| 1994 | */ |
| 1995 | static void |
| 1996 | sppp_lcp_init(struct sppp *sp) |
| 1997 | { |
| 1998 | sp->lcp.opts = (1 << LCP_OPT_MAGIC); |
| 1999 | sp->lcp.magic = 0; |
| 2000 | sp->state[IDX_LCP] = STATE_INITIAL; |
| 2001 | sp->fail_counter[IDX_LCP] = 0; |
| 2002 | sp->pp_seq[IDX_LCP] = 0; |
| 2003 | sp->pp_rseq[IDX_LCP] = 0; |
| 2004 | sp->lcp.protos = 0; |
| 2005 | |
| 2006 | /* |
| 2007 | * Initialize counters and timeout values. Note that we don't |
| 2008 | * use the 3 seconds suggested in RFC 1661 since we are likely |
| 2009 | * running on a fast link. XXX We should probably implement |
| 2010 | * the exponential backoff option. Note that these values are |
| 2011 | * relevant for all control protocols, not just LCP only. |
| 2012 | */ |
| 2013 | sp->lcp.timeout = 1 * hz; |
| 2014 | sp->lcp.max_terminate = 2; |
| 2015 | sp->lcp.max_configure = 10; |
| 2016 | sp->lcp.max_failure = 10; |
| 2017 | callout_init(&sp->ch[IDX_LCP], 0); |
| 2018 | } |
| 2019 | |
| 2020 | static void |
| 2021 | sppp_lcp_up(struct sppp *sp) |
| 2022 | { |
| 2023 | STDDCL; |
| 2024 | |
| 2025 | /* Initialize activity timestamp: opening a connection is an activity */ |
| 2026 | sp->pp_last_receive = sp->pp_last_activity = time_uptime; |
| 2027 | |
| 2028 | /* |
| 2029 | * If this interface is passive or dial-on-demand, and we are |
| 2030 | * still in Initial state, it means we've got an incoming |
| 2031 | * call. Activate the interface. |
| 2032 | */ |
| 2033 | if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { |
| 2034 | if (debug) |
| 2035 | log(LOG_DEBUG, |
| 2036 | "%s: Up event" , ifp->if_xname); |
| 2037 | ifp->if_flags |= IFF_RUNNING; |
| 2038 | if (sp->state[IDX_LCP] == STATE_INITIAL) { |
| 2039 | if (debug) |
| 2040 | addlog("(incoming call)\n" ); |
| 2041 | sp->pp_flags |= PP_CALLIN; |
| 2042 | lcp.Open(sp); |
| 2043 | } else if (debug) |
| 2044 | addlog("\n" ); |
| 2045 | } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && |
| 2046 | (sp->state[IDX_LCP] == STATE_INITIAL)) { |
| 2047 | ifp->if_flags |= IFF_RUNNING; |
| 2048 | lcp.Open(sp); |
| 2049 | } |
| 2050 | |
| 2051 | sppp_up_event(&lcp, sp); |
| 2052 | } |
| 2053 | |
| 2054 | static void |
| 2055 | sppp_lcp_down(struct sppp *sp) |
| 2056 | { |
| 2057 | STDDCL; |
| 2058 | |
| 2059 | sppp_down_event(&lcp, sp); |
| 2060 | |
| 2061 | /* |
| 2062 | * If this is neither a dial-on-demand nor a passive |
| 2063 | * interface, simulate an ``ifconfig down'' action, so the |
| 2064 | * administrator can force a redial by another ``ifconfig |
| 2065 | * up''. XXX For leased line operation, should we immediately |
| 2066 | * try to reopen the connection here? |
| 2067 | */ |
| 2068 | if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { |
| 2069 | if (debug) |
| 2070 | log(LOG_INFO, |
| 2071 | "%s: Down event (carrier loss), taking interface down.\n" , |
| 2072 | ifp->if_xname); |
| 2073 | if_down(ifp); |
| 2074 | } else { |
| 2075 | if (debug) |
| 2076 | log(LOG_DEBUG, |
| 2077 | "%s: Down event (carrier loss)\n" , |
| 2078 | ifp->if_xname); |
| 2079 | } |
| 2080 | sp->pp_flags &= ~PP_CALLIN; |
| 2081 | if (sp->state[IDX_LCP] != STATE_INITIAL) |
| 2082 | lcp.Close(sp); |
| 2083 | ifp->if_flags &= ~IFF_RUNNING; |
| 2084 | } |
| 2085 | |
| 2086 | static void |
| 2087 | sppp_lcp_open(struct sppp *sp) |
| 2088 | { |
| 2089 | if (sp->pp_if.if_mtu < PP_MTU) { |
| 2090 | sp->lcp.mru = sp->pp_if.if_mtu; |
| 2091 | sp->lcp.opts |= (1 << LCP_OPT_MRU); |
| 2092 | } else |
| 2093 | sp->lcp.mru = PP_MTU; |
| 2094 | sp->lcp.their_mru = PP_MTU; |
| 2095 | |
| 2096 | /* |
| 2097 | * If we are authenticator, negotiate LCP_AUTH |
| 2098 | */ |
| 2099 | if (sp->hisauth.proto != 0) |
| 2100 | sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); |
| 2101 | else |
| 2102 | sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); |
| 2103 | sp->pp_flags &= ~PP_NEEDAUTH; |
| 2104 | sppp_open_event(&lcp, sp); |
| 2105 | } |
| 2106 | |
| 2107 | static void |
| 2108 | sppp_lcp_close(struct sppp *sp) |
| 2109 | { |
| 2110 | sppp_close_event(&lcp, sp); |
| 2111 | } |
| 2112 | |
| 2113 | static void |
| 2114 | sppp_lcp_TO(void *cookie) |
| 2115 | { |
| 2116 | sppp_to_event(&lcp, (struct sppp *)cookie); |
| 2117 | } |
| 2118 | |
| 2119 | /* |
| 2120 | * Analyze a configure request. Return true if it was agreeable, and |
| 2121 | * caused action sca, false if it has been rejected or nak'ed, and |
| 2122 | * caused action scn. (The return value is used to make the state |
| 2123 | * transition decision in the state automaton.) |
| 2124 | */ |
| 2125 | static int |
| 2126 | sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) |
| 2127 | { |
| 2128 | STDDCL; |
| 2129 | u_char *buf, *r, *p, l, blen; |
| 2130 | int origlen, rlen; |
| 2131 | uint32_t nmagic; |
| 2132 | u_short authproto; |
| 2133 | |
| 2134 | len -= 4; |
| 2135 | origlen = len; |
| 2136 | buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); |
| 2137 | if (! buf) |
| 2138 | return (0); |
| 2139 | |
| 2140 | if (debug) |
| 2141 | log(LOG_DEBUG, "%s: lcp parse opts:" , |
| 2142 | ifp->if_xname); |
| 2143 | |
| 2144 | /* pass 1: check for things that need to be rejected */ |
| 2145 | p = (void *)(h + 1); |
| 2146 | for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2147 | /* Sanity check option length */ |
| 2148 | if (l > len) { |
| 2149 | /* |
| 2150 | * Malicious option - drop immediately. |
| 2151 | * XXX Maybe we should just RXJ it? |
| 2152 | */ |
| 2153 | addlog("%s: received malicious LCP option 0x%02x, " |
| 2154 | "length 0x%02x, (len: 0x%02x) dropping.\n" , ifp->if_xname, |
| 2155 | p[0], l, len); |
| 2156 | goto drop; |
| 2157 | } |
| 2158 | if (debug) |
| 2159 | addlog(" %s" , sppp_lcp_opt_name(*p)); |
| 2160 | switch (*p) { |
| 2161 | case LCP_OPT_MAGIC: |
| 2162 | /* Magic number. */ |
| 2163 | /* fall through, both are same length */ |
| 2164 | case LCP_OPT_ASYNC_MAP: |
| 2165 | /* Async control character map. */ |
| 2166 | if (len >= 6 || l == 6) |
| 2167 | continue; |
| 2168 | if (debug) |
| 2169 | addlog(" [invalid]" ); |
| 2170 | break; |
| 2171 | case LCP_OPT_MRU: |
| 2172 | /* Maximum receive unit. */ |
| 2173 | if (len >= 4 && l == 4) |
| 2174 | continue; |
| 2175 | if (debug) |
| 2176 | addlog(" [invalid]" ); |
| 2177 | break; |
| 2178 | case LCP_OPT_AUTH_PROTO: |
| 2179 | if (len < 4) { |
| 2180 | if (debug) |
| 2181 | addlog(" [invalid]" ); |
| 2182 | break; |
| 2183 | } |
| 2184 | authproto = (p[2] << 8) + p[3]; |
| 2185 | if (authproto == PPP_CHAP && l != 5) { |
| 2186 | if (debug) |
| 2187 | addlog(" [invalid chap len]" ); |
| 2188 | break; |
| 2189 | } |
| 2190 | if (sp->myauth.proto == 0) { |
| 2191 | /* we are not configured to do auth */ |
| 2192 | if (debug) |
| 2193 | addlog(" [not configured]" ); |
| 2194 | break; |
| 2195 | } |
| 2196 | /* |
| 2197 | * Remote want us to authenticate, remember this, |
| 2198 | * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got |
| 2199 | * up. |
| 2200 | */ |
| 2201 | sp->pp_flags |= PP_NEEDAUTH; |
| 2202 | continue; |
| 2203 | default: |
| 2204 | /* Others not supported. */ |
| 2205 | if (debug) |
| 2206 | addlog(" [rej]" ); |
| 2207 | break; |
| 2208 | } |
| 2209 | if (rlen + l > blen) { |
| 2210 | if (debug) |
| 2211 | addlog(" [overflow]" ); |
| 2212 | continue; |
| 2213 | } |
| 2214 | /* Add the option to rejected list. */ |
| 2215 | memcpy(r, p, l); |
| 2216 | r += l; |
| 2217 | rlen += l; |
| 2218 | } |
| 2219 | if (rlen) { |
| 2220 | if (debug) |
| 2221 | addlog(" send conf-rej\n" ); |
| 2222 | sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); |
| 2223 | goto end; |
| 2224 | } else if (debug) |
| 2225 | addlog("\n" ); |
| 2226 | |
| 2227 | /* |
| 2228 | * pass 2: check for option values that are unacceptable and |
| 2229 | * thus require to be nak'ed. |
| 2230 | */ |
| 2231 | if (debug) |
| 2232 | log(LOG_DEBUG, "%s: lcp parse opt values: " , |
| 2233 | ifp->if_xname); |
| 2234 | |
| 2235 | p = (void *)(h + 1); |
| 2236 | len = origlen; |
| 2237 | for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2238 | if (debug) |
| 2239 | addlog(" %s" , sppp_lcp_opt_name(*p)); |
| 2240 | switch (*p) { |
| 2241 | case LCP_OPT_MAGIC: |
| 2242 | /* Magic number -- extract. */ |
| 2243 | nmagic = (uint32_t)p[2] << 24 | |
| 2244 | (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; |
| 2245 | if (nmagic != sp->lcp.magic) { |
| 2246 | if (debug) |
| 2247 | addlog(" 0x%x" , nmagic); |
| 2248 | continue; |
| 2249 | } |
| 2250 | /* |
| 2251 | * Local and remote magics equal -- loopback? |
| 2252 | */ |
| 2253 | if (sp->pp_loopcnt >= LOOPALIVECNT*5) { |
| 2254 | printf ("%s: loopback\n" , |
| 2255 | ifp->if_xname); |
| 2256 | sp->pp_loopcnt = 0; |
| 2257 | if (ifp->if_flags & IFF_UP) { |
| 2258 | if_down(ifp); |
| 2259 | IF_PURGE(&sp->pp_cpq); |
| 2260 | /* XXX ? */ |
| 2261 | lcp.Down(sp); |
| 2262 | lcp.Up(sp); |
| 2263 | } |
| 2264 | } else if (debug) |
| 2265 | addlog(" [glitch]" ); |
| 2266 | ++sp->pp_loopcnt; |
| 2267 | /* |
| 2268 | * We negate our magic here, and NAK it. If |
| 2269 | * we see it later in an NAK packet, we |
| 2270 | * suggest a new one. |
| 2271 | */ |
| 2272 | nmagic = ~sp->lcp.magic; |
| 2273 | /* Gonna NAK it. */ |
| 2274 | p[2] = nmagic >> 24; |
| 2275 | p[3] = nmagic >> 16; |
| 2276 | p[4] = nmagic >> 8; |
| 2277 | p[5] = nmagic; |
| 2278 | break; |
| 2279 | |
| 2280 | case LCP_OPT_ASYNC_MAP: |
| 2281 | /* |
| 2282 | * Async control character map -- just ignore it. |
| 2283 | * |
| 2284 | * Quote from RFC 1662, chapter 6: |
| 2285 | * To enable this functionality, synchronous PPP |
| 2286 | * implementations MUST always respond to the |
| 2287 | * Async-Control-Character-Map Configuration |
| 2288 | * Option with the LCP Configure-Ack. However, |
| 2289 | * acceptance of the Configuration Option does |
| 2290 | * not imply that the synchronous implementation |
| 2291 | * will do any ACCM mapping. Instead, all such |
| 2292 | * octet mapping will be performed by the |
| 2293 | * asynchronous-to-synchronous converter. |
| 2294 | */ |
| 2295 | continue; |
| 2296 | |
| 2297 | case LCP_OPT_MRU: |
| 2298 | /* |
| 2299 | * Maximum receive unit. Always agreeable, |
| 2300 | * but ignored by now. |
| 2301 | */ |
| 2302 | sp->lcp.their_mru = p[2] * 256 + p[3]; |
| 2303 | if (debug) |
| 2304 | addlog(" %ld" , sp->lcp.their_mru); |
| 2305 | continue; |
| 2306 | |
| 2307 | case LCP_OPT_AUTH_PROTO: |
| 2308 | authproto = (p[2] << 8) + p[3]; |
| 2309 | if (sp->myauth.proto != authproto) { |
| 2310 | /* not agreed, nak */ |
| 2311 | if (debug) |
| 2312 | addlog(" [mine %s != his %s]" , |
| 2313 | sppp_proto_name(sp->myauth.proto), |
| 2314 | sppp_proto_name(authproto)); |
| 2315 | p[2] = sp->myauth.proto >> 8; |
| 2316 | p[3] = sp->myauth.proto; |
| 2317 | break; |
| 2318 | } |
| 2319 | if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { |
| 2320 | if (debug) |
| 2321 | addlog(" [chap not MD5]" ); |
| 2322 | p[4] = CHAP_MD5; |
| 2323 | break; |
| 2324 | } |
| 2325 | continue; |
| 2326 | } |
| 2327 | if (rlen + l > blen) { |
| 2328 | if (debug) |
| 2329 | addlog(" [overflow]" ); |
| 2330 | continue; |
| 2331 | } |
| 2332 | /* Add the option to nak'ed list. */ |
| 2333 | memcpy(r, p, l); |
| 2334 | r += l; |
| 2335 | rlen += l; |
| 2336 | } |
| 2337 | if (rlen) { |
| 2338 | if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { |
| 2339 | if (debug) |
| 2340 | addlog(" max_failure (%d) exceeded, " |
| 2341 | "send conf-rej\n" , |
| 2342 | sp->lcp.max_failure); |
| 2343 | sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); |
| 2344 | } else { |
| 2345 | if (debug) |
| 2346 | addlog(" send conf-nak\n" ); |
| 2347 | sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); |
| 2348 | } |
| 2349 | goto end; |
| 2350 | } else { |
| 2351 | if (debug) |
| 2352 | addlog(" send conf-ack\n" ); |
| 2353 | sp->fail_counter[IDX_LCP] = 0; |
| 2354 | sp->pp_loopcnt = 0; |
| 2355 | sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); |
| 2356 | } |
| 2357 | |
| 2358 | end: |
| 2359 | free(buf, M_TEMP); |
| 2360 | return (rlen == 0); |
| 2361 | |
| 2362 | drop: |
| 2363 | free(buf, M_TEMP); |
| 2364 | return -1; |
| 2365 | } |
| 2366 | |
| 2367 | /* |
| 2368 | * Analyze the LCP Configure-Reject option list, and adjust our |
| 2369 | * negotiation. |
| 2370 | */ |
| 2371 | static void |
| 2372 | sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) |
| 2373 | { |
| 2374 | STDDCL; |
| 2375 | u_char *buf, *p, l; |
| 2376 | |
| 2377 | len -= 4; |
| 2378 | buf = malloc (len, M_TEMP, M_NOWAIT); |
| 2379 | if (!buf) |
| 2380 | return; |
| 2381 | |
| 2382 | if (debug) |
| 2383 | log(LOG_DEBUG, "%s: lcp rej opts:" , |
| 2384 | ifp->if_xname); |
| 2385 | |
| 2386 | p = (void *)(h + 1); |
| 2387 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2388 | /* Sanity check option length */ |
| 2389 | if (l > len) { |
| 2390 | /* |
| 2391 | * Malicious option - drop immediately. |
| 2392 | * XXX Maybe we should just RXJ it? |
| 2393 | */ |
| 2394 | addlog("%s: received malicious LCP option, " |
| 2395 | "dropping.\n" , ifp->if_xname); |
| 2396 | goto drop; |
| 2397 | } |
| 2398 | if (debug) |
| 2399 | addlog(" %s" , sppp_lcp_opt_name(*p)); |
| 2400 | switch (*p) { |
| 2401 | case LCP_OPT_MAGIC: |
| 2402 | /* Magic number -- can't use it, use 0 */ |
| 2403 | sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); |
| 2404 | sp->lcp.magic = 0; |
| 2405 | break; |
| 2406 | case LCP_OPT_MRU: |
| 2407 | /* |
| 2408 | * We try to negotiate a lower MRU if the underlying |
| 2409 | * link's MTU is less than PP_MTU (e.g. PPPoE). If the |
| 2410 | * peer rejects this lower rate, fallback to the |
| 2411 | * default. |
| 2412 | */ |
| 2413 | if (debug) { |
| 2414 | addlog("%s: warning: peer rejected our MRU of " |
| 2415 | "%ld bytes. Defaulting to %d bytes\n" , |
| 2416 | ifp->if_xname, sp->lcp.mru, PP_MTU); |
| 2417 | } |
| 2418 | sp->lcp.opts &= ~(1 << LCP_OPT_MRU); |
| 2419 | sp->lcp.mru = PP_MTU; |
| 2420 | break; |
| 2421 | case LCP_OPT_AUTH_PROTO: |
| 2422 | /* |
| 2423 | * Peer doesn't want to authenticate himself, |
| 2424 | * deny unless this is a dialout call, and |
| 2425 | * SPPP_AUTHFLAG_NOCALLOUT is set. |
| 2426 | */ |
| 2427 | if ((sp->pp_flags & PP_CALLIN) == 0 && |
| 2428 | (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { |
| 2429 | if (debug) |
| 2430 | addlog(" [don't insist on auth " |
| 2431 | "for callout]" ); |
| 2432 | sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); |
| 2433 | break; |
| 2434 | } |
| 2435 | if (debug) |
| 2436 | addlog("[access denied]\n" ); |
| 2437 | lcp.Close(sp); |
| 2438 | break; |
| 2439 | } |
| 2440 | } |
| 2441 | if (debug) |
| 2442 | addlog("\n" ); |
| 2443 | drop: |
| 2444 | free(buf, M_TEMP); |
| 2445 | return; |
| 2446 | } |
| 2447 | |
| 2448 | /* |
| 2449 | * Analyze the LCP Configure-NAK option list, and adjust our |
| 2450 | * negotiation. |
| 2451 | */ |
| 2452 | static void |
| 2453 | sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) |
| 2454 | { |
| 2455 | STDDCL; |
| 2456 | u_char *buf, *p, l, blen; |
| 2457 | uint32_t magic; |
| 2458 | |
| 2459 | len -= 4; |
| 2460 | buf = malloc (blen = len, M_TEMP, M_NOWAIT); |
| 2461 | if (!buf) |
| 2462 | return; |
| 2463 | |
| 2464 | if (debug) |
| 2465 | log(LOG_DEBUG, "%s: lcp nak opts:" , |
| 2466 | ifp->if_xname); |
| 2467 | |
| 2468 | p = (void *)(h + 1); |
| 2469 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2470 | /* Sanity check option length */ |
| 2471 | if (l > len) { |
| 2472 | /* |
| 2473 | * Malicious option - drop immediately. |
| 2474 | * XXX Maybe we should just RXJ it? |
| 2475 | */ |
| 2476 | addlog("%s: received malicious LCP option, " |
| 2477 | "dropping.\n" , ifp->if_xname); |
| 2478 | goto drop; |
| 2479 | } |
| 2480 | if (debug) |
| 2481 | addlog(" %s" , sppp_lcp_opt_name(*p)); |
| 2482 | switch (*p) { |
| 2483 | case LCP_OPT_MAGIC: |
| 2484 | /* Magic number -- renegotiate */ |
| 2485 | if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && |
| 2486 | len >= 6 && l == 6) { |
| 2487 | magic = (uint32_t)p[2] << 24 | |
| 2488 | (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; |
| 2489 | /* |
| 2490 | * If the remote magic is our negated one, |
| 2491 | * this looks like a loopback problem. |
| 2492 | * Suggest a new magic to make sure. |
| 2493 | */ |
| 2494 | if (magic == ~sp->lcp.magic) { |
| 2495 | if (debug) |
| 2496 | addlog(" magic glitch" ); |
| 2497 | sp->lcp.magic = cprng_fast32(); |
| 2498 | } else { |
| 2499 | sp->lcp.magic = magic; |
| 2500 | if (debug) |
| 2501 | addlog(" %d" , magic); |
| 2502 | } |
| 2503 | } |
| 2504 | break; |
| 2505 | case LCP_OPT_MRU: |
| 2506 | /* |
| 2507 | * Peer wants to advise us to negotiate an MRU. |
| 2508 | * Agree on it if it's reasonable, or use |
| 2509 | * default otherwise. |
| 2510 | */ |
| 2511 | if (len >= 4 && l == 4) { |
| 2512 | u_int mru = p[2] * 256 + p[3]; |
| 2513 | if (debug) |
| 2514 | addlog(" %d" , mru); |
| 2515 | if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) |
| 2516 | mru = sp->pp_if.if_mtu; |
| 2517 | sp->lcp.mru = mru; |
| 2518 | sp->lcp.opts |= (1 << LCP_OPT_MRU); |
| 2519 | } |
| 2520 | break; |
| 2521 | case LCP_OPT_AUTH_PROTO: |
| 2522 | /* |
| 2523 | * Peer doesn't like our authentication method, |
| 2524 | * deny. |
| 2525 | */ |
| 2526 | if (debug) |
| 2527 | addlog("[access denied]\n" ); |
| 2528 | lcp.Close(sp); |
| 2529 | break; |
| 2530 | } |
| 2531 | } |
| 2532 | if (debug) |
| 2533 | addlog("\n" ); |
| 2534 | drop: |
| 2535 | free(buf, M_TEMP); |
| 2536 | return; |
| 2537 | } |
| 2538 | |
| 2539 | static void |
| 2540 | sppp_lcp_tlu(struct sppp *sp) |
| 2541 | { |
| 2542 | struct ifnet *ifp = &sp->pp_if; |
| 2543 | int i; |
| 2544 | uint32_t mask; |
| 2545 | |
| 2546 | /* XXX ? */ |
| 2547 | if (! (ifp->if_flags & IFF_UP) && |
| 2548 | (ifp->if_flags & IFF_RUNNING)) { |
| 2549 | /* Coming out of loopback mode. */ |
| 2550 | if_up(ifp); |
| 2551 | } |
| 2552 | |
| 2553 | for (i = 0; i < IDX_COUNT; i++) |
| 2554 | if ((cps[i])->flags & CP_QUAL) |
| 2555 | (cps[i])->Open(sp); |
| 2556 | |
| 2557 | if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || |
| 2558 | (sp->pp_flags & PP_NEEDAUTH) != 0) |
| 2559 | sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); |
| 2560 | else |
| 2561 | sppp_change_phase(sp, SPPP_PHASE_NETWORK); |
| 2562 | |
| 2563 | /* |
| 2564 | * Open all authentication protocols. This is even required |
| 2565 | * if we already proceeded to network phase, since it might be |
| 2566 | * that remote wants us to authenticate, so we might have to |
| 2567 | * send a PAP request. Undesired authentication protocols |
| 2568 | * don't do anything when they get an Open event. |
| 2569 | */ |
| 2570 | for (i = 0; i < IDX_COUNT; i++) |
| 2571 | if ((cps[i])->flags & CP_AUTH) |
| 2572 | (cps[i])->Open(sp); |
| 2573 | |
| 2574 | if (sp->pp_phase == SPPP_PHASE_NETWORK) { |
| 2575 | /* Notify all NCPs. */ |
| 2576 | for (i = 0; i < IDX_COUNT; i++) |
| 2577 | if ((cps[i])->flags & CP_NCP) |
| 2578 | (cps[i])->Open(sp); |
| 2579 | } |
| 2580 | |
| 2581 | /* Send Up events to all started protos. */ |
| 2582 | for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) |
| 2583 | if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) |
| 2584 | (cps[i])->Up(sp); |
| 2585 | |
| 2586 | /* notify low-level driver of state change */ |
| 2587 | if (sp->pp_chg) |
| 2588 | sp->pp_chg(sp, (int)sp->pp_phase); |
| 2589 | |
| 2590 | if (sp->pp_phase == SPPP_PHASE_NETWORK) |
| 2591 | /* if no NCP is starting, close down */ |
| 2592 | sppp_lcp_check_and_close(sp); |
| 2593 | } |
| 2594 | |
| 2595 | static void |
| 2596 | sppp_lcp_tld(struct sppp *sp) |
| 2597 | { |
| 2598 | int i; |
| 2599 | uint32_t mask; |
| 2600 | |
| 2601 | sppp_change_phase(sp, SPPP_PHASE_TERMINATE); |
| 2602 | |
| 2603 | /* |
| 2604 | * Take upper layers down. We send the Down event first and |
| 2605 | * the Close second to prevent the upper layers from sending |
| 2606 | * ``a flurry of terminate-request packets'', as the RFC |
| 2607 | * describes it. |
| 2608 | */ |
| 2609 | for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) |
| 2610 | if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { |
| 2611 | (cps[i])->Down(sp); |
| 2612 | (cps[i])->Close(sp); |
| 2613 | } |
| 2614 | } |
| 2615 | |
| 2616 | static void |
| 2617 | sppp_lcp_tls(struct sppp *sp) |
| 2618 | { |
| 2619 | |
| 2620 | if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { |
| 2621 | printf("%s: authentication failed %d times, not retrying again\n" , |
| 2622 | sp->pp_if.if_xname, sp->pp_auth_failures); |
| 2623 | if_down(&sp->pp_if); |
| 2624 | return; |
| 2625 | } |
| 2626 | |
| 2627 | sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); |
| 2628 | |
| 2629 | /* Notify lower layer if desired. */ |
| 2630 | if (sp->pp_tls) |
| 2631 | (sp->pp_tls)(sp); |
| 2632 | } |
| 2633 | |
| 2634 | static void |
| 2635 | sppp_lcp_tlf(struct sppp *sp) |
| 2636 | { |
| 2637 | |
| 2638 | sppp_change_phase(sp, SPPP_PHASE_DEAD); |
| 2639 | |
| 2640 | /* Notify lower layer if desired. */ |
| 2641 | if (sp->pp_tlf) |
| 2642 | (sp->pp_tlf)(sp); |
| 2643 | } |
| 2644 | |
| 2645 | static void |
| 2646 | sppp_lcp_scr(struct sppp *sp) |
| 2647 | { |
| 2648 | char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; |
| 2649 | int i = 0; |
| 2650 | u_short authproto; |
| 2651 | |
| 2652 | if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { |
| 2653 | if (! sp->lcp.magic) |
| 2654 | sp->lcp.magic = cprng_fast32(); |
| 2655 | opt[i++] = LCP_OPT_MAGIC; |
| 2656 | opt[i++] = 6; |
| 2657 | opt[i++] = sp->lcp.magic >> 24; |
| 2658 | opt[i++] = sp->lcp.magic >> 16; |
| 2659 | opt[i++] = sp->lcp.magic >> 8; |
| 2660 | opt[i++] = sp->lcp.magic; |
| 2661 | } |
| 2662 | |
| 2663 | if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { |
| 2664 | opt[i++] = LCP_OPT_MRU; |
| 2665 | opt[i++] = 4; |
| 2666 | opt[i++] = sp->lcp.mru >> 8; |
| 2667 | opt[i++] = sp->lcp.mru; |
| 2668 | } |
| 2669 | |
| 2670 | if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { |
| 2671 | authproto = sp->hisauth.proto; |
| 2672 | opt[i++] = LCP_OPT_AUTH_PROTO; |
| 2673 | opt[i++] = authproto == PPP_CHAP? 5: 4; |
| 2674 | opt[i++] = authproto >> 8; |
| 2675 | opt[i++] = authproto; |
| 2676 | if (authproto == PPP_CHAP) |
| 2677 | opt[i++] = CHAP_MD5; |
| 2678 | } |
| 2679 | |
| 2680 | sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; |
| 2681 | sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); |
| 2682 | } |
| 2683 | |
| 2684 | /* |
| 2685 | * Check the open NCPs, return true if at least one NCP is open. |
| 2686 | */ |
| 2687 | static int |
| 2688 | sppp_ncp_check(struct sppp *sp) |
| 2689 | { |
| 2690 | int i, mask; |
| 2691 | |
| 2692 | for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) |
| 2693 | if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) |
| 2694 | return 1; |
| 2695 | return 0; |
| 2696 | } |
| 2697 | |
| 2698 | /* |
| 2699 | * Re-check the open NCPs and see if we should terminate the link. |
| 2700 | * Called by the NCPs during their tlf action handling. |
| 2701 | */ |
| 2702 | static void |
| 2703 | sppp_lcp_check_and_close(struct sppp *sp) |
| 2704 | { |
| 2705 | |
| 2706 | if (sp->pp_phase < SPPP_PHASE_NETWORK) |
| 2707 | /* don't bother, we are already going down */ |
| 2708 | return; |
| 2709 | |
| 2710 | if (sppp_ncp_check(sp)) |
| 2711 | return; |
| 2712 | |
| 2713 | lcp.Close(sp); |
| 2714 | } |
| 2715 | |
| 2716 | |
| 2717 | /* |
| 2718 | *--------------------------------------------------------------------------* |
| 2719 | * * |
| 2720 | * The IPCP implementation. * |
| 2721 | * * |
| 2722 | *--------------------------------------------------------------------------* |
| 2723 | */ |
| 2724 | |
| 2725 | static void |
| 2726 | sppp_ipcp_init(struct sppp *sp) |
| 2727 | { |
| 2728 | sp->ipcp.opts = 0; |
| 2729 | sp->ipcp.flags = 0; |
| 2730 | sp->state[IDX_IPCP] = STATE_INITIAL; |
| 2731 | sp->fail_counter[IDX_IPCP] = 0; |
| 2732 | sp->pp_seq[IDX_IPCP] = 0; |
| 2733 | sp->pp_rseq[IDX_IPCP] = 0; |
| 2734 | callout_init(&sp->ch[IDX_IPCP], 0); |
| 2735 | } |
| 2736 | |
| 2737 | static void |
| 2738 | sppp_ipcp_up(struct sppp *sp) |
| 2739 | { |
| 2740 | sppp_up_event(&ipcp, sp); |
| 2741 | } |
| 2742 | |
| 2743 | static void |
| 2744 | sppp_ipcp_down(struct sppp *sp) |
| 2745 | { |
| 2746 | sppp_down_event(&ipcp, sp); |
| 2747 | } |
| 2748 | |
| 2749 | static void |
| 2750 | sppp_ipcp_open(struct sppp *sp) |
| 2751 | { |
| 2752 | STDDCL; |
| 2753 | uint32_t myaddr, hisaddr; |
| 2754 | |
| 2755 | sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); |
| 2756 | sp->ipcp.req_myaddr = 0; |
| 2757 | sp->ipcp.req_hisaddr = 0; |
| 2758 | memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); |
| 2759 | |
| 2760 | #ifdef INET |
| 2761 | sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); |
| 2762 | #else |
| 2763 | myaddr = hisaddr = 0; |
| 2764 | #endif |
| 2765 | /* |
| 2766 | * If we don't have his address, this probably means our |
| 2767 | * interface doesn't want to talk IP at all. (This could |
| 2768 | * be the case if somebody wants to speak only IPX, for |
| 2769 | * example.) Don't open IPCP in this case. |
| 2770 | */ |
| 2771 | if (hisaddr == 0) { |
| 2772 | /* XXX this message should go away */ |
| 2773 | if (debug) |
| 2774 | log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n" , |
| 2775 | ifp->if_xname); |
| 2776 | return; |
| 2777 | } |
| 2778 | |
| 2779 | if (myaddr == 0) { |
| 2780 | /* |
| 2781 | * I don't have an assigned address, so i need to |
| 2782 | * negotiate my address. |
| 2783 | */ |
| 2784 | sp->ipcp.flags |= IPCP_MYADDR_DYN; |
| 2785 | sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); |
| 2786 | } |
| 2787 | if (hisaddr == 1) { |
| 2788 | /* |
| 2789 | * XXX - remove this hack! |
| 2790 | * remote has no valid address, we need to get one assigned. |
| 2791 | */ |
| 2792 | sp->ipcp.flags |= IPCP_HISADDR_DYN; |
| 2793 | } |
| 2794 | sppp_open_event(&ipcp, sp); |
| 2795 | } |
| 2796 | |
| 2797 | static void |
| 2798 | sppp_ipcp_close(struct sppp *sp) |
| 2799 | { |
| 2800 | STDDCL; |
| 2801 | |
| 2802 | sppp_close_event(&ipcp, sp); |
| 2803 | #ifdef INET |
| 2804 | if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) |
| 2805 | /* |
| 2806 | * Some address was dynamic, clear it again. |
| 2807 | */ |
| 2808 | sppp_clear_ip_addrs(sp); |
| 2809 | #endif |
| 2810 | |
| 2811 | if (sp->pp_saved_mtu > 0) { |
| 2812 | ifp->if_mtu = sp->pp_saved_mtu; |
| 2813 | sp->pp_saved_mtu = 0; |
| 2814 | if (debug) |
| 2815 | log(LOG_DEBUG, |
| 2816 | "%s: resetting MTU to %" PRIu64 " bytes\n" , |
| 2817 | ifp->if_xname, ifp->if_mtu); |
| 2818 | } |
| 2819 | } |
| 2820 | |
| 2821 | static void |
| 2822 | sppp_ipcp_TO(void *cookie) |
| 2823 | { |
| 2824 | sppp_to_event(&ipcp, (struct sppp *)cookie); |
| 2825 | } |
| 2826 | |
| 2827 | /* |
| 2828 | * Analyze a configure request. Return true if it was agreeable, and |
| 2829 | * caused action sca, false if it has been rejected or nak'ed, and |
| 2830 | * caused action scn. (The return value is used to make the state |
| 2831 | * transition decision in the state automaton.) |
| 2832 | */ |
| 2833 | static int |
| 2834 | sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) |
| 2835 | { |
| 2836 | u_char *buf, *r, *p, l, blen; |
| 2837 | struct ifnet *ifp = &sp->pp_if; |
| 2838 | int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; |
| 2839 | uint32_t hisaddr, desiredaddr; |
| 2840 | |
| 2841 | len -= 4; |
| 2842 | origlen = len; |
| 2843 | /* |
| 2844 | * Make sure to allocate a buf that can at least hold a |
| 2845 | * conf-nak with an `address' option. We might need it below. |
| 2846 | */ |
| 2847 | blen = len < 6 ? 6 : len; |
| 2848 | buf = r = malloc (blen, M_TEMP, M_NOWAIT); |
| 2849 | if (! buf) |
| 2850 | return (0); |
| 2851 | |
| 2852 | /* pass 1: see if we can recognize them */ |
| 2853 | if (debug) |
| 2854 | log(LOG_DEBUG, "%s: ipcp parse opts:" , |
| 2855 | ifp->if_xname); |
| 2856 | p = (void *)(h + 1); |
| 2857 | for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2858 | /* Sanity check option length */ |
| 2859 | if (l > len) { |
| 2860 | /* XXX should we just RXJ? */ |
| 2861 | addlog("%s: malicious IPCP option received, dropping\n" , |
| 2862 | ifp->if_xname); |
| 2863 | goto drop; |
| 2864 | } |
| 2865 | if (debug) |
| 2866 | addlog(" %s" , sppp_ipcp_opt_name(*p)); |
| 2867 | switch (*p) { |
| 2868 | #ifdef notyet |
| 2869 | case IPCP_OPT_COMPRESSION: |
| 2870 | if (len >= 6 && l >= 6) { |
| 2871 | /* correctly formed compress option */ |
| 2872 | continue; |
| 2873 | } |
| 2874 | if (debug) |
| 2875 | addlog(" [invalid]" ); |
| 2876 | break; |
| 2877 | #endif |
| 2878 | case IPCP_OPT_ADDRESS: |
| 2879 | if (len >= 6 && l == 6) { |
| 2880 | /* correctly formed address option */ |
| 2881 | continue; |
| 2882 | } |
| 2883 | if (debug) |
| 2884 | addlog(" [invalid]" ); |
| 2885 | break; |
| 2886 | default: |
| 2887 | /* Others not supported. */ |
| 2888 | if (debug) |
| 2889 | addlog(" [rej]" ); |
| 2890 | break; |
| 2891 | } |
| 2892 | /* Add the option to rejected list. */ |
| 2893 | if (rlen + l > blen) { |
| 2894 | if (debug) |
| 2895 | addlog(" [overflow]" ); |
| 2896 | continue; |
| 2897 | } |
| 2898 | memcpy(r, p, l); |
| 2899 | r += l; |
| 2900 | rlen += l; |
| 2901 | } |
| 2902 | if (rlen) { |
| 2903 | if (debug) |
| 2904 | addlog(" send conf-rej\n" ); |
| 2905 | sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); |
| 2906 | goto end; |
| 2907 | } else if (debug) |
| 2908 | addlog("\n" ); |
| 2909 | |
| 2910 | /* pass 2: parse option values */ |
| 2911 | if (sp->ipcp.flags & IPCP_HISADDR_SEEN) |
| 2912 | hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ |
| 2913 | else |
| 2914 | #ifdef INET |
| 2915 | sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ |
| 2916 | #else |
| 2917 | hisaddr = 0; |
| 2918 | #endif |
| 2919 | if (debug) |
| 2920 | log(LOG_DEBUG, "%s: ipcp parse opt values: " , |
| 2921 | ifp->if_xname); |
| 2922 | p = (void *)(h + 1); |
| 2923 | len = origlen; |
| 2924 | for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 2925 | if (debug) |
| 2926 | addlog(" %s" , sppp_ipcp_opt_name(*p)); |
| 2927 | switch (*p) { |
| 2928 | #ifdef notyet |
| 2929 | case IPCP_OPT_COMPRESSION: |
| 2930 | continue; |
| 2931 | #endif |
| 2932 | case IPCP_OPT_ADDRESS: |
| 2933 | desiredaddr = p[2] << 24 | p[3] << 16 | |
| 2934 | p[4] << 8 | p[5]; |
| 2935 | if (desiredaddr == hisaddr || |
| 2936 | ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { |
| 2937 | /* |
| 2938 | * Peer's address is same as our value, |
| 2939 | * this is agreeable. Gonna conf-ack |
| 2940 | * it. |
| 2941 | */ |
| 2942 | if (debug) |
| 2943 | addlog(" %s [ack]" , |
| 2944 | sppp_dotted_quad(hisaddr)); |
| 2945 | /* record that we've seen it already */ |
| 2946 | sp->ipcp.flags |= IPCP_HISADDR_SEEN; |
| 2947 | sp->ipcp.req_hisaddr = desiredaddr; |
| 2948 | hisaddr = desiredaddr; |
| 2949 | continue; |
| 2950 | } |
| 2951 | /* |
| 2952 | * The address wasn't agreeable. This is either |
| 2953 | * he sent us 0.0.0.0, asking to assign him an |
| 2954 | * address, or he send us another address not |
| 2955 | * matching our value. Either case, we gonna |
| 2956 | * conf-nak it with our value. |
| 2957 | */ |
| 2958 | if (debug) { |
| 2959 | if (desiredaddr == 0) |
| 2960 | addlog(" [addr requested]" ); |
| 2961 | else |
| 2962 | addlog(" %s [not agreed]" , |
| 2963 | sppp_dotted_quad(desiredaddr)); |
| 2964 | } |
| 2965 | |
| 2966 | p[2] = hisaddr >> 24; |
| 2967 | p[3] = hisaddr >> 16; |
| 2968 | p[4] = hisaddr >> 8; |
| 2969 | p[5] = hisaddr; |
| 2970 | break; |
| 2971 | } |
| 2972 | if (rlen + l > blen) { |
| 2973 | if (debug) |
| 2974 | addlog(" [overflow]" ); |
| 2975 | continue; |
| 2976 | } |
| 2977 | /* Add the option to nak'ed list. */ |
| 2978 | memcpy(r, p, l); |
| 2979 | r += l; |
| 2980 | rlen += l; |
| 2981 | } |
| 2982 | |
| 2983 | /* |
| 2984 | * If we are about to conf-ack the request, but haven't seen |
| 2985 | * his address so far, gonna conf-nak it instead, with the |
| 2986 | * `address' option present and our idea of his address being |
| 2987 | * filled in there, to request negotiation of both addresses. |
| 2988 | * |
| 2989 | * XXX This can result in an endless req - nak loop if peer |
| 2990 | * doesn't want to send us his address. Q: What should we do |
| 2991 | * about it? XXX A: implement the max-failure counter. |
| 2992 | */ |
| 2993 | if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { |
| 2994 | buf[0] = IPCP_OPT_ADDRESS; |
| 2995 | buf[1] = 6; |
| 2996 | buf[2] = hisaddr >> 24; |
| 2997 | buf[3] = hisaddr >> 16; |
| 2998 | buf[4] = hisaddr >> 8; |
| 2999 | buf[5] = hisaddr; |
| 3000 | rlen = 6; |
| 3001 | if (debug) |
| 3002 | addlog(" still need hisaddr" ); |
| 3003 | } |
| 3004 | |
| 3005 | if (rlen) { |
| 3006 | if (debug) |
| 3007 | addlog(" send conf-nak\n" ); |
| 3008 | sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); |
| 3009 | } else { |
| 3010 | if (debug) |
| 3011 | addlog(" send conf-ack\n" ); |
| 3012 | sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); |
| 3013 | } |
| 3014 | |
| 3015 | end: |
| 3016 | free(buf, M_TEMP); |
| 3017 | return (rlen == 0); |
| 3018 | |
| 3019 | drop: |
| 3020 | free(buf, M_TEMP); |
| 3021 | return -1; |
| 3022 | } |
| 3023 | |
| 3024 | /* |
| 3025 | * Analyze the IPCP Configure-Reject option list, and adjust our |
| 3026 | * negotiation. |
| 3027 | */ |
| 3028 | static void |
| 3029 | sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) |
| 3030 | { |
| 3031 | u_char *buf, *p, l, blen; |
| 3032 | struct ifnet *ifp = &sp->pp_if; |
| 3033 | int debug = ifp->if_flags & IFF_DEBUG; |
| 3034 | |
| 3035 | len -= 4; |
| 3036 | buf = malloc (blen = len, M_TEMP, M_NOWAIT); |
| 3037 | if (!buf) |
| 3038 | return; |
| 3039 | |
| 3040 | if (debug) |
| 3041 | log(LOG_DEBUG, "%s: ipcp rej opts:" , |
| 3042 | ifp->if_xname); |
| 3043 | |
| 3044 | p = (void *)(h + 1); |
| 3045 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3046 | /* Sanity check option length */ |
| 3047 | if (l > len) { |
| 3048 | /* XXX should we just RXJ? */ |
| 3049 | addlog("%s: malicious IPCP option received, dropping\n" , |
| 3050 | ifp->if_xname); |
| 3051 | goto drop; |
| 3052 | } |
| 3053 | if (debug) |
| 3054 | addlog(" %s" , sppp_ipcp_opt_name(*p)); |
| 3055 | switch (*p) { |
| 3056 | case IPCP_OPT_ADDRESS: |
| 3057 | /* |
| 3058 | * Peer doesn't grok address option. This is |
| 3059 | * bad. XXX Should we better give up here? |
| 3060 | */ |
| 3061 | sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); |
| 3062 | break; |
| 3063 | #ifdef notyet |
| 3064 | case IPCP_OPT_COMPRESS: |
| 3065 | sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); |
| 3066 | break; |
| 3067 | #endif |
| 3068 | } |
| 3069 | } |
| 3070 | if (debug) |
| 3071 | addlog("\n" ); |
| 3072 | drop: |
| 3073 | free(buf, M_TEMP); |
| 3074 | return; |
| 3075 | } |
| 3076 | |
| 3077 | /* |
| 3078 | * Analyze the IPCP Configure-NAK option list, and adjust our |
| 3079 | * negotiation. |
| 3080 | */ |
| 3081 | static void |
| 3082 | sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) |
| 3083 | { |
| 3084 | u_char *p, l; |
| 3085 | struct ifnet *ifp = &sp->pp_if; |
| 3086 | int debug = ifp->if_flags & IFF_DEBUG; |
| 3087 | uint32_t wantaddr; |
| 3088 | |
| 3089 | len -= 4; |
| 3090 | |
| 3091 | if (debug) |
| 3092 | log(LOG_DEBUG, "%s: ipcp nak opts:" , |
| 3093 | ifp->if_xname); |
| 3094 | |
| 3095 | p = (void *)(h + 1); |
| 3096 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3097 | /* Sanity check option length */ |
| 3098 | if (l > len) { |
| 3099 | /* XXX should we just RXJ? */ |
| 3100 | addlog("%s: malicious IPCP option received, dropping\n" , |
| 3101 | ifp->if_xname); |
| 3102 | return; |
| 3103 | } |
| 3104 | if (debug) |
| 3105 | addlog(" %s" , sppp_ipcp_opt_name(*p)); |
| 3106 | switch (*p) { |
| 3107 | case IPCP_OPT_ADDRESS: |
| 3108 | /* |
| 3109 | * Peer doesn't like our local IP address. See |
| 3110 | * if we can do something for him. We'll drop |
| 3111 | * him our address then. |
| 3112 | */ |
| 3113 | if (len >= 6 && l == 6) { |
| 3114 | wantaddr = p[2] << 24 | p[3] << 16 | |
| 3115 | p[4] << 8 | p[5]; |
| 3116 | sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); |
| 3117 | if (debug) |
| 3118 | addlog(" [wantaddr %s]" , |
| 3119 | sppp_dotted_quad(wantaddr)); |
| 3120 | /* |
| 3121 | * When doing dynamic address assignment, |
| 3122 | * we accept his offer. Otherwise, we |
| 3123 | * ignore it and thus continue to negotiate |
| 3124 | * our already existing value. |
| 3125 | */ |
| 3126 | if (sp->ipcp.flags & IPCP_MYADDR_DYN) { |
| 3127 | if (debug) |
| 3128 | addlog(" [agree]" ); |
| 3129 | sp->ipcp.flags |= IPCP_MYADDR_SEEN; |
| 3130 | sp->ipcp.req_myaddr = wantaddr; |
| 3131 | } |
| 3132 | } |
| 3133 | break; |
| 3134 | |
| 3135 | case IPCP_OPT_PRIMDNS: |
| 3136 | if (len >= 6 && l == 6) { |
| 3137 | sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | |
| 3138 | p[4] << 8 | p[5]; |
| 3139 | } |
| 3140 | break; |
| 3141 | |
| 3142 | case IPCP_OPT_SECDNS: |
| 3143 | if (len >= 6 && l == 6) { |
| 3144 | sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | |
| 3145 | p[4] << 8 | p[5]; |
| 3146 | } |
| 3147 | break; |
| 3148 | #ifdef notyet |
| 3149 | case IPCP_OPT_COMPRESS: |
| 3150 | /* |
| 3151 | * Peer wants different compression parameters. |
| 3152 | */ |
| 3153 | break; |
| 3154 | #endif |
| 3155 | } |
| 3156 | } |
| 3157 | if (debug) |
| 3158 | addlog("\n" ); |
| 3159 | } |
| 3160 | |
| 3161 | static void |
| 3162 | sppp_ipcp_tlu(struct sppp *sp) |
| 3163 | { |
| 3164 | #ifdef INET |
| 3165 | /* we are up. Set addresses and notify anyone interested */ |
| 3166 | STDDCL; |
| 3167 | uint32_t myaddr, hisaddr; |
| 3168 | |
| 3169 | sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); |
| 3170 | if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) |
| 3171 | myaddr = sp->ipcp.req_myaddr; |
| 3172 | if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) |
| 3173 | hisaddr = sp->ipcp.req_hisaddr; |
| 3174 | sppp_set_ip_addrs(sp, myaddr, hisaddr); |
| 3175 | |
| 3176 | if (ifp->if_mtu > sp->lcp.their_mru) { |
| 3177 | sp->pp_saved_mtu = ifp->if_mtu; |
| 3178 | ifp->if_mtu = sp->lcp.their_mru; |
| 3179 | if (debug) |
| 3180 | log(LOG_DEBUG, |
| 3181 | "%s: setting MTU to %" PRIu64 " bytes\n" , |
| 3182 | ifp->if_xname, ifp->if_mtu); |
| 3183 | } |
| 3184 | |
| 3185 | if (sp->pp_con) |
| 3186 | sp->pp_con(sp); |
| 3187 | #endif |
| 3188 | } |
| 3189 | |
| 3190 | static void |
| 3191 | sppp_ipcp_tld(struct sppp *sp) |
| 3192 | { |
| 3193 | } |
| 3194 | |
| 3195 | static void |
| 3196 | sppp_ipcp_tls(struct sppp *sp) |
| 3197 | { |
| 3198 | /* indicate to LCP that it must stay alive */ |
| 3199 | sp->lcp.protos |= (1 << IDX_IPCP); |
| 3200 | } |
| 3201 | |
| 3202 | static void |
| 3203 | sppp_ipcp_tlf(struct sppp *sp) |
| 3204 | { |
| 3205 | /* we no longer need LCP */ |
| 3206 | sp->lcp.protos &= ~(1 << IDX_IPCP); |
| 3207 | } |
| 3208 | |
| 3209 | static void |
| 3210 | sppp_ipcp_scr(struct sppp *sp) |
| 3211 | { |
| 3212 | uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; |
| 3213 | #ifdef INET |
| 3214 | uint32_t ouraddr; |
| 3215 | #endif |
| 3216 | int i = 0; |
| 3217 | |
| 3218 | #ifdef notyet |
| 3219 | if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { |
| 3220 | opt[i++] = IPCP_OPT_COMPRESSION; |
| 3221 | opt[i++] = 6; |
| 3222 | opt[i++] = 0; /* VJ header compression */ |
| 3223 | opt[i++] = 0x2d; /* VJ header compression */ |
| 3224 | opt[i++] = max_slot_id; |
| 3225 | opt[i++] = comp_slot_id; |
| 3226 | } |
| 3227 | #endif |
| 3228 | |
| 3229 | #ifdef INET |
| 3230 | if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { |
| 3231 | if (sp->ipcp.flags & IPCP_MYADDR_SEEN) |
| 3232 | ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ |
| 3233 | else |
| 3234 | sppp_get_ip_addrs(sp, &ouraddr, 0, 0); |
| 3235 | opt[i++] = IPCP_OPT_ADDRESS; |
| 3236 | opt[i++] = 6; |
| 3237 | opt[i++] = ouraddr >> 24; |
| 3238 | opt[i++] = ouraddr >> 16; |
| 3239 | opt[i++] = ouraddr >> 8; |
| 3240 | opt[i++] = ouraddr; |
| 3241 | } |
| 3242 | #endif |
| 3243 | |
| 3244 | if (sp->query_dns & 1) { |
| 3245 | opt[i++] = IPCP_OPT_PRIMDNS; |
| 3246 | opt[i++] = 6; |
| 3247 | opt[i++] = sp->dns_addrs[0] >> 24; |
| 3248 | opt[i++] = sp->dns_addrs[0] >> 16; |
| 3249 | opt[i++] = sp->dns_addrs[0] >> 8; |
| 3250 | opt[i++] = sp->dns_addrs[0]; |
| 3251 | } |
| 3252 | if (sp->query_dns & 2) { |
| 3253 | opt[i++] = IPCP_OPT_SECDNS; |
| 3254 | opt[i++] = 6; |
| 3255 | opt[i++] = sp->dns_addrs[1] >> 24; |
| 3256 | opt[i++] = sp->dns_addrs[1] >> 16; |
| 3257 | opt[i++] = sp->dns_addrs[1] >> 8; |
| 3258 | opt[i++] = sp->dns_addrs[1]; |
| 3259 | } |
| 3260 | |
| 3261 | sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; |
| 3262 | sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); |
| 3263 | } |
| 3264 | |
| 3265 | |
| 3266 | /* |
| 3267 | *--------------------------------------------------------------------------* |
| 3268 | * * |
| 3269 | * The IPv6CP implementation. * |
| 3270 | * * |
| 3271 | *--------------------------------------------------------------------------* |
| 3272 | */ |
| 3273 | |
| 3274 | #ifdef INET6 |
| 3275 | static void |
| 3276 | sppp_ipv6cp_init(struct sppp *sp) |
| 3277 | { |
| 3278 | sp->ipv6cp.opts = 0; |
| 3279 | sp->ipv6cp.flags = 0; |
| 3280 | sp->state[IDX_IPV6CP] = STATE_INITIAL; |
| 3281 | sp->fail_counter[IDX_IPV6CP] = 0; |
| 3282 | sp->pp_seq[IDX_IPV6CP] = 0; |
| 3283 | sp->pp_rseq[IDX_IPV6CP] = 0; |
| 3284 | callout_init(&sp->ch[IDX_IPV6CP], 0); |
| 3285 | } |
| 3286 | |
| 3287 | static void |
| 3288 | sppp_ipv6cp_up(struct sppp *sp) |
| 3289 | { |
| 3290 | sppp_up_event(&ipv6cp, sp); |
| 3291 | } |
| 3292 | |
| 3293 | static void |
| 3294 | sppp_ipv6cp_down(struct sppp *sp) |
| 3295 | { |
| 3296 | sppp_down_event(&ipv6cp, sp); |
| 3297 | } |
| 3298 | |
| 3299 | static void |
| 3300 | sppp_ipv6cp_open(struct sppp *sp) |
| 3301 | { |
| 3302 | STDDCL; |
| 3303 | struct in6_addr myaddr, hisaddr; |
| 3304 | |
| 3305 | #ifdef IPV6CP_MYIFID_DYN |
| 3306 | sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); |
| 3307 | #else |
| 3308 | sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; |
| 3309 | #endif |
| 3310 | |
| 3311 | sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); |
| 3312 | /* |
| 3313 | * If we don't have our address, this probably means our |
| 3314 | * interface doesn't want to talk IPv6 at all. (This could |
| 3315 | * be the case if somebody wants to speak only IPX, for |
| 3316 | * example.) Don't open IPv6CP in this case. |
| 3317 | */ |
| 3318 | if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { |
| 3319 | /* XXX this message should go away */ |
| 3320 | if (debug) |
| 3321 | log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n" , |
| 3322 | ifp->if_xname); |
| 3323 | return; |
| 3324 | } |
| 3325 | |
| 3326 | sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; |
| 3327 | sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); |
| 3328 | sppp_open_event(&ipv6cp, sp); |
| 3329 | } |
| 3330 | |
| 3331 | static void |
| 3332 | sppp_ipv6cp_close(struct sppp *sp) |
| 3333 | { |
| 3334 | sppp_close_event(&ipv6cp, sp); |
| 3335 | } |
| 3336 | |
| 3337 | static void |
| 3338 | sppp_ipv6cp_TO(void *cookie) |
| 3339 | { |
| 3340 | sppp_to_event(&ipv6cp, (struct sppp *)cookie); |
| 3341 | } |
| 3342 | |
| 3343 | /* |
| 3344 | * Analyze a configure request. Return true if it was agreeable, and |
| 3345 | * caused action sca, false if it has been rejected or nak'ed, and |
| 3346 | * caused action scn. (The return value is used to make the state |
| 3347 | * transition decision in the state automaton.) |
| 3348 | */ |
| 3349 | static int |
| 3350 | sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) |
| 3351 | { |
| 3352 | u_char *buf, *r, *p, l, blen; |
| 3353 | struct ifnet *ifp = &sp->pp_if; |
| 3354 | int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; |
| 3355 | struct in6_addr myaddr, desiredaddr, suggestaddr; |
| 3356 | int ifidcount; |
| 3357 | int type; |
| 3358 | int collision, nohisaddr; |
| 3359 | |
| 3360 | len -= 4; |
| 3361 | origlen = len; |
| 3362 | /* |
| 3363 | * Make sure to allocate a buf that can at least hold a |
| 3364 | * conf-nak with an `address' option. We might need it below. |
| 3365 | */ |
| 3366 | blen = len < 6 ? 6 : len; |
| 3367 | buf = r = malloc (blen, M_TEMP, M_NOWAIT); |
| 3368 | if (! buf) |
| 3369 | return (0); |
| 3370 | |
| 3371 | /* pass 1: see if we can recognize them */ |
| 3372 | if (debug) |
| 3373 | log(LOG_DEBUG, "%s: ipv6cp parse opts:" , |
| 3374 | ifp->if_xname); |
| 3375 | p = (void *)(h + 1); |
| 3376 | ifidcount = 0; |
| 3377 | for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3378 | /* Sanity check option length */ |
| 3379 | if (l > len) { |
| 3380 | /* XXX just RXJ? */ |
| 3381 | addlog("%s: received malicious IPCPv6 option, " |
| 3382 | "dropping\n" , ifp->if_xname); |
| 3383 | goto drop; |
| 3384 | } |
| 3385 | if (debug) |
| 3386 | addlog(" %s" , sppp_ipv6cp_opt_name(*p)); |
| 3387 | switch (*p) { |
| 3388 | case IPV6CP_OPT_IFID: |
| 3389 | if (len >= 10 && l == 10 && ifidcount == 0) { |
| 3390 | /* correctly formed address option */ |
| 3391 | ifidcount++; |
| 3392 | continue; |
| 3393 | } |
| 3394 | if (debug) |
| 3395 | addlog(" [invalid]" ); |
| 3396 | break; |
| 3397 | #ifdef notyet |
| 3398 | case IPV6CP_OPT_COMPRESSION: |
| 3399 | if (len >= 4 && l >= 4) { |
| 3400 | /* correctly formed compress option */ |
| 3401 | continue; |
| 3402 | } |
| 3403 | if (debug) |
| 3404 | addlog(" [invalid]" ); |
| 3405 | break; |
| 3406 | #endif |
| 3407 | default: |
| 3408 | /* Others not supported. */ |
| 3409 | if (debug) |
| 3410 | addlog(" [rej]" ); |
| 3411 | break; |
| 3412 | } |
| 3413 | if (rlen + l > blen) { |
| 3414 | if (debug) |
| 3415 | addlog(" [overflow]" ); |
| 3416 | continue; |
| 3417 | } |
| 3418 | /* Add the option to rejected list. */ |
| 3419 | memcpy(r, p, l); |
| 3420 | r += l; |
| 3421 | rlen += l; |
| 3422 | } |
| 3423 | if (rlen) { |
| 3424 | if (debug) |
| 3425 | addlog(" send conf-rej\n" ); |
| 3426 | sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); |
| 3427 | goto end; |
| 3428 | } else if (debug) |
| 3429 | addlog("\n" ); |
| 3430 | |
| 3431 | /* pass 2: parse option values */ |
| 3432 | sppp_get_ip6_addrs(sp, &myaddr, 0, 0); |
| 3433 | if (debug) |
| 3434 | log(LOG_DEBUG, "%s: ipv6cp parse opt values: " , |
| 3435 | ifp->if_xname); |
| 3436 | p = (void *)(h + 1); |
| 3437 | len = origlen; |
| 3438 | type = CONF_ACK; |
| 3439 | for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3440 | if (debug) |
| 3441 | addlog(" %s" , sppp_ipv6cp_opt_name(*p)); |
| 3442 | switch (*p) { |
| 3443 | #ifdef notyet |
| 3444 | case IPV6CP_OPT_COMPRESSION: |
| 3445 | continue; |
| 3446 | #endif |
| 3447 | case IPV6CP_OPT_IFID: |
| 3448 | memset(&desiredaddr, 0, sizeof(desiredaddr)); |
| 3449 | memcpy(&desiredaddr.s6_addr[8], &p[2], 8); |
| 3450 | collision = (memcmp(&desiredaddr.s6_addr[8], |
| 3451 | &myaddr.s6_addr[8], 8) == 0); |
| 3452 | nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); |
| 3453 | |
| 3454 | desiredaddr.s6_addr16[0] = htons(0xfe80); |
| 3455 | (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); |
| 3456 | |
| 3457 | if (!collision && !nohisaddr) { |
| 3458 | /* no collision, hisaddr known - Conf-Ack */ |
| 3459 | type = CONF_ACK; |
| 3460 | |
| 3461 | if (debug) { |
| 3462 | addlog(" %s [%s]" , |
| 3463 | ip6_sprintf(&desiredaddr), |
| 3464 | sppp_cp_type_name(type)); |
| 3465 | } |
| 3466 | continue; |
| 3467 | } |
| 3468 | |
| 3469 | memset(&suggestaddr, 0, sizeof(suggestaddr)); |
| 3470 | if (collision && nohisaddr) { |
| 3471 | /* collision, hisaddr unknown - Conf-Rej */ |
| 3472 | type = CONF_REJ; |
| 3473 | memset(&p[2], 0, 8); |
| 3474 | } else { |
| 3475 | /* |
| 3476 | * - no collision, hisaddr unknown, or |
| 3477 | * - collision, hisaddr known |
| 3478 | * Conf-Nak, suggest hisaddr |
| 3479 | */ |
| 3480 | type = CONF_NAK; |
| 3481 | sppp_suggest_ip6_addr(sp, &suggestaddr); |
| 3482 | memcpy(&p[2], &suggestaddr.s6_addr[8], 8); |
| 3483 | } |
| 3484 | if (debug) |
| 3485 | addlog(" %s [%s]" , ip6_sprintf(&desiredaddr), |
| 3486 | sppp_cp_type_name(type)); |
| 3487 | break; |
| 3488 | } |
| 3489 | if (rlen + l > blen) { |
| 3490 | if (debug) |
| 3491 | addlog(" [overflow]" ); |
| 3492 | continue; |
| 3493 | } |
| 3494 | /* Add the option to nak'ed list. */ |
| 3495 | memcpy(r, p, l); |
| 3496 | r += l; |
| 3497 | rlen += l; |
| 3498 | } |
| 3499 | |
| 3500 | if (rlen == 0 && type == CONF_ACK) { |
| 3501 | if (debug) |
| 3502 | addlog(" send %s\n" , sppp_cp_type_name(type)); |
| 3503 | sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); |
| 3504 | } else { |
| 3505 | #ifdef notdef |
| 3506 | if (type == CONF_ACK) |
| 3507 | panic("IPv6CP RCR: CONF_ACK with non-zero rlen" ); |
| 3508 | #endif |
| 3509 | |
| 3510 | if (debug) { |
| 3511 | addlog(" send %s suggest %s\n" , |
| 3512 | sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); |
| 3513 | } |
| 3514 | sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); |
| 3515 | } |
| 3516 | |
| 3517 | end: |
| 3518 | free(buf, M_TEMP); |
| 3519 | return (rlen == 0); |
| 3520 | |
| 3521 | drop: |
| 3522 | free(buf, M_TEMP); |
| 3523 | return -1; |
| 3524 | } |
| 3525 | |
| 3526 | /* |
| 3527 | * Analyze the IPv6CP Configure-Reject option list, and adjust our |
| 3528 | * negotiation. |
| 3529 | */ |
| 3530 | static void |
| 3531 | sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) |
| 3532 | { |
| 3533 | u_char *buf, *p, l, blen; |
| 3534 | struct ifnet *ifp = &sp->pp_if; |
| 3535 | int debug = ifp->if_flags & IFF_DEBUG; |
| 3536 | |
| 3537 | len -= 4; |
| 3538 | buf = malloc (blen = len, M_TEMP, M_NOWAIT); |
| 3539 | if (!buf) |
| 3540 | return; |
| 3541 | |
| 3542 | if (debug) |
| 3543 | log(LOG_DEBUG, "%s: ipv6cp rej opts:" , |
| 3544 | ifp->if_xname); |
| 3545 | |
| 3546 | p = (void *)(h + 1); |
| 3547 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3548 | if (l > len) { |
| 3549 | /* XXX just RXJ? */ |
| 3550 | addlog("%s: received malicious IPCPv6 option, " |
| 3551 | "dropping\n" , ifp->if_xname); |
| 3552 | goto drop; |
| 3553 | } |
| 3554 | if (debug) |
| 3555 | addlog(" %s" , sppp_ipv6cp_opt_name(*p)); |
| 3556 | switch (*p) { |
| 3557 | case IPV6CP_OPT_IFID: |
| 3558 | /* |
| 3559 | * Peer doesn't grok address option. This is |
| 3560 | * bad. XXX Should we better give up here? |
| 3561 | */ |
| 3562 | sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); |
| 3563 | break; |
| 3564 | #ifdef notyet |
| 3565 | case IPV6CP_OPT_COMPRESS: |
| 3566 | sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); |
| 3567 | break; |
| 3568 | #endif |
| 3569 | } |
| 3570 | } |
| 3571 | if (debug) |
| 3572 | addlog("\n" ); |
| 3573 | drop: |
| 3574 | free(buf, M_TEMP); |
| 3575 | return; |
| 3576 | } |
| 3577 | |
| 3578 | /* |
| 3579 | * Analyze the IPv6CP Configure-NAK option list, and adjust our |
| 3580 | * negotiation. |
| 3581 | */ |
| 3582 | static void |
| 3583 | sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) |
| 3584 | { |
| 3585 | u_char *buf, *p, l, blen; |
| 3586 | struct ifnet *ifp = &sp->pp_if; |
| 3587 | int debug = ifp->if_flags & IFF_DEBUG; |
| 3588 | struct in6_addr suggestaddr; |
| 3589 | |
| 3590 | len -= 4; |
| 3591 | buf = malloc (blen = len, M_TEMP, M_NOWAIT); |
| 3592 | if (!buf) |
| 3593 | return; |
| 3594 | |
| 3595 | if (debug) |
| 3596 | log(LOG_DEBUG, "%s: ipv6cp nak opts:" , |
| 3597 | ifp->if_xname); |
| 3598 | |
| 3599 | p = (void *)(h + 1); |
| 3600 | for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { |
| 3601 | if (l > len) { |
| 3602 | /* XXX just RXJ? */ |
| 3603 | addlog("%s: received malicious IPCPv6 option, " |
| 3604 | "dropping\n" , ifp->if_xname); |
| 3605 | goto drop; |
| 3606 | } |
| 3607 | if (debug) |
| 3608 | addlog(" %s" , sppp_ipv6cp_opt_name(*p)); |
| 3609 | switch (*p) { |
| 3610 | case IPV6CP_OPT_IFID: |
| 3611 | /* |
| 3612 | * Peer doesn't like our local ifid. See |
| 3613 | * if we can do something for him. We'll drop |
| 3614 | * him our address then. |
| 3615 | */ |
| 3616 | if (len < 10 || l != 10) |
| 3617 | break; |
| 3618 | memset(&suggestaddr, 0, sizeof(suggestaddr)); |
| 3619 | suggestaddr.s6_addr16[0] = htons(0xfe80); |
| 3620 | (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); |
| 3621 | memcpy(&suggestaddr.s6_addr[8], &p[2], 8); |
| 3622 | |
| 3623 | sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); |
| 3624 | if (debug) |
| 3625 | addlog(" [suggestaddr %s]" , |
| 3626 | ip6_sprintf(&suggestaddr)); |
| 3627 | #ifdef IPV6CP_MYIFID_DYN |
| 3628 | /* |
| 3629 | * When doing dynamic address assignment, |
| 3630 | * we accept his offer. |
| 3631 | */ |
| 3632 | if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { |
| 3633 | struct in6_addr lastsuggest; |
| 3634 | /* |
| 3635 | * If <suggested myaddr from peer> equals to |
| 3636 | * <hisaddr we have suggested last time>, |
| 3637 | * we have a collision. generate new random |
| 3638 | * ifid. |
| 3639 | */ |
| 3640 | sppp_suggest_ip6_addr(&lastsuggest); |
| 3641 | if (IN6_ARE_ADDR_EQUAL(&suggestaddr, |
| 3642 | lastsuggest)) { |
| 3643 | if (debug) |
| 3644 | addlog(" [random]" ); |
| 3645 | sppp_gen_ip6_addr(sp, &suggestaddr); |
| 3646 | } |
| 3647 | sppp_set_ip6_addr(sp, &suggestaddr, 0); |
| 3648 | if (debug) |
| 3649 | addlog(" [agree]" ); |
| 3650 | sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; |
| 3651 | } |
| 3652 | #else |
| 3653 | /* |
| 3654 | * Since we do not do dynamic address assignment, |
| 3655 | * we ignore it and thus continue to negotiate |
| 3656 | * our already existing value. This can possibly |
| 3657 | * go into infinite request-reject loop. |
| 3658 | * |
| 3659 | * This is not likely because we normally use |
| 3660 | * ifid based on MAC-address. |
| 3661 | * If you have no ethernet card on the node, too bad. |
| 3662 | * XXX should we use fail_counter? |
| 3663 | */ |
| 3664 | #endif |
| 3665 | break; |
| 3666 | #ifdef notyet |
| 3667 | case IPV6CP_OPT_COMPRESS: |
| 3668 | /* |
| 3669 | * Peer wants different compression parameters. |
| 3670 | */ |
| 3671 | break; |
| 3672 | #endif |
| 3673 | } |
| 3674 | } |
| 3675 | if (debug) |
| 3676 | addlog("\n" ); |
| 3677 | drop: |
| 3678 | free(buf, M_TEMP); |
| 3679 | return; |
| 3680 | } |
| 3681 | |
| 3682 | static void |
| 3683 | sppp_ipv6cp_tlu(struct sppp *sp) |
| 3684 | { |
| 3685 | /* we are up - notify isdn daemon */ |
| 3686 | if (sp->pp_con) |
| 3687 | sp->pp_con(sp); |
| 3688 | } |
| 3689 | |
| 3690 | static void |
| 3691 | sppp_ipv6cp_tld(struct sppp *sp) |
| 3692 | { |
| 3693 | } |
| 3694 | |
| 3695 | static void |
| 3696 | sppp_ipv6cp_tls(struct sppp *sp) |
| 3697 | { |
| 3698 | /* indicate to LCP that it must stay alive */ |
| 3699 | sp->lcp.protos |= (1 << IDX_IPV6CP); |
| 3700 | } |
| 3701 | |
| 3702 | static void |
| 3703 | sppp_ipv6cp_tlf(struct sppp *sp) |
| 3704 | { |
| 3705 | /* we no longer need LCP */ |
| 3706 | sp->lcp.protos &= ~(1 << IDX_IPV6CP); |
| 3707 | } |
| 3708 | |
| 3709 | static void |
| 3710 | sppp_ipv6cp_scr(struct sppp *sp) |
| 3711 | { |
| 3712 | char opt[10 /* ifid */ + 4 /* compression, minimum */]; |
| 3713 | struct in6_addr ouraddr; |
| 3714 | int i = 0; |
| 3715 | |
| 3716 | if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { |
| 3717 | sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); |
| 3718 | opt[i++] = IPV6CP_OPT_IFID; |
| 3719 | opt[i++] = 10; |
| 3720 | memcpy(&opt[i], &ouraddr.s6_addr[8], 8); |
| 3721 | i += 8; |
| 3722 | } |
| 3723 | |
| 3724 | #ifdef notyet |
| 3725 | if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { |
| 3726 | opt[i++] = IPV6CP_OPT_COMPRESSION; |
| 3727 | opt[i++] = 4; |
| 3728 | opt[i++] = 0; /* TBD */ |
| 3729 | opt[i++] = 0; /* TBD */ |
| 3730 | /* variable length data may follow */ |
| 3731 | } |
| 3732 | #endif |
| 3733 | |
| 3734 | sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; |
| 3735 | sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); |
| 3736 | } |
| 3737 | #else /*INET6*/ |
| 3738 | static void |
| 3739 | sppp_ipv6cp_init(struct sppp *sp) |
| 3740 | { |
| 3741 | } |
| 3742 | |
| 3743 | static void |
| 3744 | sppp_ipv6cp_up(struct sppp *sp) |
| 3745 | { |
| 3746 | } |
| 3747 | |
| 3748 | static void |
| 3749 | sppp_ipv6cp_down(struct sppp *sp) |
| 3750 | { |
| 3751 | } |
| 3752 | |
| 3753 | static void |
| 3754 | sppp_ipv6cp_open(struct sppp *sp) |
| 3755 | { |
| 3756 | } |
| 3757 | |
| 3758 | static void |
| 3759 | sppp_ipv6cp_close(struct sppp *sp) |
| 3760 | { |
| 3761 | } |
| 3762 | |
| 3763 | static void |
| 3764 | sppp_ipv6cp_TO(void *sp) |
| 3765 | { |
| 3766 | } |
| 3767 | |
| 3768 | static int |
| 3769 | sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, |
| 3770 | int len) |
| 3771 | { |
| 3772 | return 0; |
| 3773 | } |
| 3774 | |
| 3775 | static void |
| 3776 | sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, |
| 3777 | int len) |
| 3778 | { |
| 3779 | } |
| 3780 | |
| 3781 | static void |
| 3782 | sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, |
| 3783 | int len) |
| 3784 | { |
| 3785 | } |
| 3786 | |
| 3787 | static void |
| 3788 | sppp_ipv6cp_tlu(struct sppp *sp) |
| 3789 | { |
| 3790 | } |
| 3791 | |
| 3792 | static void |
| 3793 | sppp_ipv6cp_tld(struct sppp *sp) |
| 3794 | { |
| 3795 | } |
| 3796 | |
| 3797 | static void |
| 3798 | sppp_ipv6cp_tls(struct sppp *sp) |
| 3799 | { |
| 3800 | } |
| 3801 | |
| 3802 | static void |
| 3803 | sppp_ipv6cp_tlf(struct sppp *sp) |
| 3804 | { |
| 3805 | } |
| 3806 | |
| 3807 | static void |
| 3808 | sppp_ipv6cp_scr(struct sppp *sp) |
| 3809 | { |
| 3810 | } |
| 3811 | #endif /*INET6*/ |
| 3812 | |
| 3813 | |
| 3814 | /* |
| 3815 | *--------------------------------------------------------------------------* |
| 3816 | * * |
| 3817 | * The CHAP implementation. * |
| 3818 | * * |
| 3819 | *--------------------------------------------------------------------------* |
| 3820 | */ |
| 3821 | |
| 3822 | /* |
| 3823 | * The authentication protocols don't employ a full-fledged state machine as |
| 3824 | * the control protocols do, since they do have Open and Close events, but |
| 3825 | * not Up and Down, nor are they explicitly terminated. Also, use of the |
| 3826 | * authentication protocols may be different in both directions (this makes |
| 3827 | * sense, think of a machine that never accepts incoming calls but only |
| 3828 | * calls out, it doesn't require the called party to authenticate itself). |
| 3829 | * |
| 3830 | * Our state machine for the local authentication protocol (we are requesting |
| 3831 | * the peer to authenticate) looks like: |
| 3832 | * |
| 3833 | * RCA- |
| 3834 | * +--------------------------------------------+ |
| 3835 | * V scn,tld| |
| 3836 | * +--------+ Close +---------+ RCA+ |
| 3837 | * | |<----------------------------------| |------+ |
| 3838 | * +--->| Closed | TO* | Opened | sca | |
| 3839 | * | | |-----+ +-------| |<-----+ |
| 3840 | * | +--------+ irc | | +---------+ |
| 3841 | * | ^ | | ^ |
| 3842 | * | | | | | |
| 3843 | * | | | | | |
| 3844 | * | TO-| | | | |
| 3845 | * | |tld TO+ V | | |
| 3846 | * | | +------->+ | | |
| 3847 | * | | | | | | |
| 3848 | * | +--------+ V | | |
| 3849 | * | | |<----+<--------------------+ | |
| 3850 | * | | Req- | scr | |
| 3851 | * | | Sent | | |
| 3852 | * | | | | |
| 3853 | * | +--------+ | |
| 3854 | * | RCA- | | RCA+ | |
| 3855 | * +------+ +------------------------------------------+ |
| 3856 | * scn,tld sca,irc,ict,tlu |
| 3857 | * |
| 3858 | * |
| 3859 | * with: |
| 3860 | * |
| 3861 | * Open: LCP reached authentication phase |
| 3862 | * Close: LCP reached terminate phase |
| 3863 | * |
| 3864 | * RCA+: received reply (pap-req, chap-response), acceptable |
| 3865 | * RCN: received reply (pap-req, chap-response), not acceptable |
| 3866 | * TO+: timeout with restart counter >= 0 |
| 3867 | * TO-: timeout with restart counter < 0 |
| 3868 | * TO*: reschedule timeout for CHAP |
| 3869 | * |
| 3870 | * scr: send request packet (none for PAP, chap-challenge) |
| 3871 | * sca: send ack packet (pap-ack, chap-success) |
| 3872 | * scn: send nak packet (pap-nak, chap-failure) |
| 3873 | * ict: initialize re-challenge timer (CHAP only) |
| 3874 | * |
| 3875 | * tlu: this-layer-up, LCP reaches network phase |
| 3876 | * tld: this-layer-down, LCP enters terminate phase |
| 3877 | * |
| 3878 | * Note that in CHAP mode, after sending a new challenge, while the state |
| 3879 | * automaton falls back into Req-Sent state, it doesn't signal a tld |
| 3880 | * event to LCP, so LCP remains in network phase. Only after not getting |
| 3881 | * any response (or after getting an unacceptable response), CHAP closes, |
| 3882 | * causing LCP to enter terminate phase. |
| 3883 | * |
| 3884 | * With PAP, there is no initial request that can be sent. The peer is |
| 3885 | * expected to send one based on the successful negotiation of PAP as |
| 3886 | * the authentication protocol during the LCP option negotiation. |
| 3887 | * |
| 3888 | * Incoming authentication protocol requests (remote requests |
| 3889 | * authentication, we are peer) don't employ a state machine at all, |
| 3890 | * they are simply answered. Some peers [Ascend P50 firmware rev |
| 3891 | * 4.50] react allergically when sending IPCP/IPv6CP requests while they are |
| 3892 | * still in authentication phase (thereby violating the standard that |
| 3893 | * demands that these NCP packets are to be discarded), so we keep |
| 3894 | * track of the peer demanding us to authenticate, and only proceed to |
| 3895 | * phase network once we've seen a positive acknowledge for the |
| 3896 | * authentication. |
| 3897 | */ |
| 3898 | |
| 3899 | /* |
| 3900 | * Handle incoming CHAP packets. |
| 3901 | */ |
| 3902 | void |
| 3903 | sppp_chap_input(struct sppp *sp, struct mbuf *m) |
| 3904 | { |
| 3905 | STDDCL; |
| 3906 | struct lcp_header *h; |
| 3907 | int len, x; |
| 3908 | u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; |
| 3909 | int value_len, name_len; |
| 3910 | MD5_CTX ctx; |
| 3911 | |
| 3912 | len = m->m_pkthdr.len; |
| 3913 | if (len < 4) { |
| 3914 | if (debug) |
| 3915 | log(LOG_DEBUG, |
| 3916 | "%s: chap invalid packet length: %d bytes\n" , |
| 3917 | ifp->if_xname, len); |
| 3918 | return; |
| 3919 | } |
| 3920 | h = mtod(m, struct lcp_header *); |
| 3921 | if (len > ntohs(h->len)) |
| 3922 | len = ntohs(h->len); |
| 3923 | |
| 3924 | switch (h->type) { |
| 3925 | /* challenge, failure and success are his authproto */ |
| 3926 | case CHAP_CHALLENGE: |
| 3927 | if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { |
| 3928 | /* can't do anything useful */ |
| 3929 | sp->pp_auth_failures++; |
| 3930 | printf("%s: chap input without my name and my secret being set\n" , |
| 3931 | ifp->if_xname); |
| 3932 | break; |
| 3933 | } |
| 3934 | value = 1 + (u_char *)(h + 1); |
| 3935 | value_len = value[-1]; |
| 3936 | name = value + value_len; |
| 3937 | name_len = len - value_len - 5; |
| 3938 | if (name_len < 0) { |
| 3939 | if (debug) { |
| 3940 | log(LOG_DEBUG, |
| 3941 | "%s: chap corrupted challenge " |
| 3942 | "<%s id=0x%x len=%d" , |
| 3943 | ifp->if_xname, |
| 3944 | sppp_auth_type_name(PPP_CHAP, h->type), |
| 3945 | h->ident, ntohs(h->len)); |
| 3946 | if (len > 4) |
| 3947 | sppp_print_bytes((u_char *)(h + 1), |
| 3948 | len - 4); |
| 3949 | addlog(">\n" ); |
| 3950 | } |
| 3951 | break; |
| 3952 | } |
| 3953 | |
| 3954 | if (debug) { |
| 3955 | log(LOG_DEBUG, |
| 3956 | "%s: chap input <%s id=0x%x len=%d name=" , |
| 3957 | ifp->if_xname, |
| 3958 | sppp_auth_type_name(PPP_CHAP, h->type), h->ident, |
| 3959 | ntohs(h->len)); |
| 3960 | sppp_print_string((char *) name, name_len); |
| 3961 | addlog(" value-size=%d value=" , value_len); |
| 3962 | sppp_print_bytes(value, value_len); |
| 3963 | addlog(">\n" ); |
| 3964 | } |
| 3965 | |
| 3966 | /* Compute reply value. */ |
| 3967 | MD5Init(&ctx); |
| 3968 | MD5Update(&ctx, &h->ident, 1); |
| 3969 | MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); |
| 3970 | MD5Update(&ctx, value, value_len); |
| 3971 | MD5Final(digest, &ctx); |
| 3972 | dsize = sizeof digest; |
| 3973 | |
| 3974 | sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, |
| 3975 | sizeof dsize, (const char *)&dsize, |
| 3976 | sizeof digest, digest, |
| 3977 | sp->myauth.name_len, |
| 3978 | sp->myauth.name, |
| 3979 | 0); |
| 3980 | break; |
| 3981 | |
| 3982 | case CHAP_SUCCESS: |
| 3983 | if (debug) { |
| 3984 | log(LOG_DEBUG, "%s: chap success" , |
| 3985 | ifp->if_xname); |
| 3986 | if (len > 4) { |
| 3987 | addlog(": " ); |
| 3988 | sppp_print_string((char *)(h + 1), len - 4); |
| 3989 | } |
| 3990 | addlog("\n" ); |
| 3991 | } |
| 3992 | x = splnet(); |
| 3993 | sp->pp_auth_failures = 0; |
| 3994 | sp->pp_flags &= ~PP_NEEDAUTH; |
| 3995 | if (sp->myauth.proto == PPP_CHAP && |
| 3996 | (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && |
| 3997 | (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { |
| 3998 | /* |
| 3999 | * We are authenticator for CHAP but didn't |
| 4000 | * complete yet. Leave it to tlu to proceed |
| 4001 | * to network phase. |
| 4002 | */ |
| 4003 | splx(x); |
| 4004 | break; |
| 4005 | } |
| 4006 | splx(x); |
| 4007 | sppp_phase_network(sp); |
| 4008 | break; |
| 4009 | |
| 4010 | case CHAP_FAILURE: |
| 4011 | x = splnet(); |
| 4012 | sp->pp_auth_failures++; |
| 4013 | splx(x); |
| 4014 | if (debug) { |
| 4015 | log(LOG_INFO, "%s: chap failure" , |
| 4016 | ifp->if_xname); |
| 4017 | if (len > 4) { |
| 4018 | addlog(": " ); |
| 4019 | sppp_print_string((char *)(h + 1), len - 4); |
| 4020 | } |
| 4021 | addlog("\n" ); |
| 4022 | } else |
| 4023 | log(LOG_INFO, "%s: chap failure\n" , |
| 4024 | ifp->if_xname); |
| 4025 | /* await LCP shutdown by authenticator */ |
| 4026 | break; |
| 4027 | |
| 4028 | /* response is my authproto */ |
| 4029 | case CHAP_RESPONSE: |
| 4030 | if (sp->hisauth.secret == NULL) { |
| 4031 | /* can't do anything useful */ |
| 4032 | printf("%s: chap input without his secret being set\n" , |
| 4033 | ifp->if_xname); |
| 4034 | break; |
| 4035 | } |
| 4036 | value = 1 + (u_char *)(h + 1); |
| 4037 | value_len = value[-1]; |
| 4038 | name = value + value_len; |
| 4039 | name_len = len - value_len - 5; |
| 4040 | if (name_len < 0) { |
| 4041 | if (debug) { |
| 4042 | log(LOG_DEBUG, |
| 4043 | "%s: chap corrupted response " |
| 4044 | "<%s id=0x%x len=%d" , |
| 4045 | ifp->if_xname, |
| 4046 | sppp_auth_type_name(PPP_CHAP, h->type), |
| 4047 | h->ident, ntohs(h->len)); |
| 4048 | if (len > 4) |
| 4049 | sppp_print_bytes((u_char *)(h + 1), |
| 4050 | len - 4); |
| 4051 | addlog(">\n" ); |
| 4052 | } |
| 4053 | break; |
| 4054 | } |
| 4055 | if (h->ident != sp->confid[IDX_CHAP]) { |
| 4056 | if (debug) |
| 4057 | log(LOG_DEBUG, |
| 4058 | "%s: chap dropping response for old ID " |
| 4059 | "(got %d, expected %d)\n" , |
| 4060 | ifp->if_xname, |
| 4061 | h->ident, sp->confid[IDX_CHAP]); |
| 4062 | break; |
| 4063 | } |
| 4064 | if (sp->hisauth.name != NULL && |
| 4065 | (name_len != sp->hisauth.name_len |
| 4066 | || memcmp(name, sp->hisauth.name, name_len) != 0)) { |
| 4067 | log(LOG_INFO, "%s: chap response, his name " , |
| 4068 | ifp->if_xname); |
| 4069 | sppp_print_string(name, name_len); |
| 4070 | addlog(" != expected " ); |
| 4071 | sppp_print_string(sp->hisauth.name, |
| 4072 | sp->hisauth.name_len); |
| 4073 | addlog("\n" ); |
| 4074 | goto chap_failure; |
| 4075 | } |
| 4076 | if (debug) { |
| 4077 | log(LOG_DEBUG, "%s: chap input(%s) " |
| 4078 | "<%s id=0x%x len=%d name=" , |
| 4079 | ifp->if_xname, |
| 4080 | sppp_state_name(sp->state[IDX_CHAP]), |
| 4081 | sppp_auth_type_name(PPP_CHAP, h->type), |
| 4082 | h->ident, ntohs(h->len)); |
| 4083 | sppp_print_string((char *)name, name_len); |
| 4084 | addlog(" value-size=%d value=" , value_len); |
| 4085 | sppp_print_bytes(value, value_len); |
| 4086 | addlog(">\n" ); |
| 4087 | } |
| 4088 | if (value_len != sizeof(sp->hisauth.challenge)) { |
| 4089 | if (debug) |
| 4090 | log(LOG_DEBUG, |
| 4091 | "%s: chap bad hash value length: " |
| 4092 | "%d bytes, should be %zu\n" , |
| 4093 | ifp->if_xname, value_len, |
| 4094 | sizeof(sp->hisauth.challenge)); |
| 4095 | goto chap_failure; |
| 4096 | } |
| 4097 | |
| 4098 | MD5Init(&ctx); |
| 4099 | MD5Update(&ctx, &h->ident, 1); |
| 4100 | MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); |
| 4101 | MD5Update(&ctx, sp->hisauth.challenge, sizeof(sp->hisauth.challenge)); |
| 4102 | MD5Final(digest, &ctx); |
| 4103 | |
| 4104 | #define FAILMSG "Failed..." |
| 4105 | #define SUCCMSG "Welcome!" |
| 4106 | |
| 4107 | if (value_len != sizeof digest || |
| 4108 | memcmp(digest, value, value_len) != 0) { |
| 4109 | chap_failure: |
| 4110 | /* action scn, tld */ |
| 4111 | x = splnet(); |
| 4112 | sp->pp_auth_failures++; |
| 4113 | splx(x); |
| 4114 | sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, |
| 4115 | sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, |
| 4116 | 0); |
| 4117 | chap.tld(sp); |
| 4118 | break; |
| 4119 | } |
| 4120 | sp->pp_auth_failures = 0; |
| 4121 | /* action sca, perhaps tlu */ |
| 4122 | if (sp->state[IDX_CHAP] == STATE_REQ_SENT || |
| 4123 | sp->state[IDX_CHAP] == STATE_OPENED) |
| 4124 | sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, |
| 4125 | sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, |
| 4126 | 0); |
| 4127 | if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { |
| 4128 | sppp_cp_change_state(&chap, sp, STATE_OPENED); |
| 4129 | chap.tlu(sp); |
| 4130 | } |
| 4131 | break; |
| 4132 | |
| 4133 | default: |
| 4134 | /* Unknown CHAP packet type -- ignore. */ |
| 4135 | if (debug) { |
| 4136 | log(LOG_DEBUG, "%s: chap unknown input(%s) " |
| 4137 | "<0x%x id=0x%xh len=%d" , |
| 4138 | ifp->if_xname, |
| 4139 | sppp_state_name(sp->state[IDX_CHAP]), |
| 4140 | h->type, h->ident, ntohs(h->len)); |
| 4141 | if (len > 4) |
| 4142 | sppp_print_bytes((u_char *)(h + 1), len - 4); |
| 4143 | addlog(">\n" ); |
| 4144 | } |
| 4145 | break; |
| 4146 | |
| 4147 | } |
| 4148 | } |
| 4149 | |
| 4150 | static void |
| 4151 | sppp_chap_init(struct sppp *sp) |
| 4152 | { |
| 4153 | /* Chap doesn't have STATE_INITIAL at all. */ |
| 4154 | sp->state[IDX_CHAP] = STATE_CLOSED; |
| 4155 | sp->fail_counter[IDX_CHAP] = 0; |
| 4156 | sp->pp_seq[IDX_CHAP] = 0; |
| 4157 | sp->pp_rseq[IDX_CHAP] = 0; |
| 4158 | callout_init(&sp->ch[IDX_CHAP], 0); |
| 4159 | } |
| 4160 | |
| 4161 | static void |
| 4162 | sppp_chap_open(struct sppp *sp) |
| 4163 | { |
| 4164 | if (sp->hisauth.proto == PPP_CHAP && |
| 4165 | (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { |
| 4166 | /* we are authenticator for CHAP, start it */ |
| 4167 | chap.scr(sp); |
| 4168 | sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; |
| 4169 | sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); |
| 4170 | } |
| 4171 | /* nothing to be done if we are peer, await a challenge */ |
| 4172 | } |
| 4173 | |
| 4174 | static void |
| 4175 | sppp_chap_close(struct sppp *sp) |
| 4176 | { |
| 4177 | if (sp->state[IDX_CHAP] != STATE_CLOSED) |
| 4178 | sppp_cp_change_state(&chap, sp, STATE_CLOSED); |
| 4179 | } |
| 4180 | |
| 4181 | static void |
| 4182 | sppp_chap_TO(void *cookie) |
| 4183 | { |
| 4184 | struct sppp *sp = (struct sppp *)cookie; |
| 4185 | STDDCL; |
| 4186 | int s; |
| 4187 | |
| 4188 | s = splnet(); |
| 4189 | if (debug) |
| 4190 | log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n" , |
| 4191 | ifp->if_xname, |
| 4192 | sppp_state_name(sp->state[IDX_CHAP]), |
| 4193 | sp->rst_counter[IDX_CHAP]); |
| 4194 | |
| 4195 | if (--sp->rst_counter[IDX_CHAP] < 0) |
| 4196 | /* TO- event */ |
| 4197 | switch (sp->state[IDX_CHAP]) { |
| 4198 | case STATE_REQ_SENT: |
| 4199 | chap.tld(sp); |
| 4200 | sppp_cp_change_state(&chap, sp, STATE_CLOSED); |
| 4201 | break; |
| 4202 | } |
| 4203 | else |
| 4204 | /* TO+ (or TO*) event */ |
| 4205 | switch (sp->state[IDX_CHAP]) { |
| 4206 | case STATE_OPENED: |
| 4207 | /* TO* event */ |
| 4208 | sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; |
| 4209 | /* fall through */ |
| 4210 | case STATE_REQ_SENT: |
| 4211 | chap.scr(sp); |
| 4212 | /* sppp_cp_change_state() will restart the timer */ |
| 4213 | sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); |
| 4214 | break; |
| 4215 | } |
| 4216 | |
| 4217 | splx(s); |
| 4218 | } |
| 4219 | |
| 4220 | static void |
| 4221 | sppp_chap_tlu(struct sppp *sp) |
| 4222 | { |
| 4223 | STDDCL; |
| 4224 | int i, x; |
| 4225 | |
| 4226 | i = 0; |
| 4227 | sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; |
| 4228 | |
| 4229 | /* |
| 4230 | * Some broken CHAP implementations (Conware CoNet, firmware |
| 4231 | * 4.0.?) don't want to re-authenticate their CHAP once the |
| 4232 | * initial challenge-response exchange has taken place. |
| 4233 | * Provide for an option to avoid rechallenges. |
| 4234 | */ |
| 4235 | if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { |
| 4236 | /* |
| 4237 | * Compute the re-challenge timeout. This will yield |
| 4238 | * a number between 300 and 810 seconds. |
| 4239 | */ |
| 4240 | i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); |
| 4241 | |
| 4242 | callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); |
| 4243 | } |
| 4244 | |
| 4245 | if (debug) { |
| 4246 | log(LOG_DEBUG, |
| 4247 | "%s: chap %s, " , |
| 4248 | ifp->if_xname, |
| 4249 | sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed" : "tlu" ); |
| 4250 | if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) |
| 4251 | addlog("next re-challenge in %d seconds\n" , i); |
| 4252 | else |
| 4253 | addlog("re-challenging supressed\n" ); |
| 4254 | } |
| 4255 | |
| 4256 | x = splnet(); |
| 4257 | sp->pp_auth_failures = 0; |
| 4258 | /* indicate to LCP that we need to be closed down */ |
| 4259 | sp->lcp.protos |= (1 << IDX_CHAP); |
| 4260 | |
| 4261 | if (sp->pp_flags & PP_NEEDAUTH) { |
| 4262 | /* |
| 4263 | * Remote is authenticator, but his auth proto didn't |
| 4264 | * complete yet. Defer the transition to network |
| 4265 | * phase. |
| 4266 | */ |
| 4267 | splx(x); |
| 4268 | return; |
| 4269 | } |
| 4270 | splx(x); |
| 4271 | |
| 4272 | /* |
| 4273 | * If we are already in phase network, we are done here. This |
| 4274 | * is the case if this is a dummy tlu event after a re-challenge. |
| 4275 | */ |
| 4276 | if (sp->pp_phase != SPPP_PHASE_NETWORK) |
| 4277 | sppp_phase_network(sp); |
| 4278 | } |
| 4279 | |
| 4280 | static void |
| 4281 | sppp_chap_tld(struct sppp *sp) |
| 4282 | { |
| 4283 | STDDCL; |
| 4284 | |
| 4285 | if (debug) |
| 4286 | log(LOG_DEBUG, "%s: chap tld\n" , ifp->if_xname); |
| 4287 | callout_stop(&sp->ch[IDX_CHAP]); |
| 4288 | sp->lcp.protos &= ~(1 << IDX_CHAP); |
| 4289 | |
| 4290 | lcp.Close(sp); |
| 4291 | } |
| 4292 | |
| 4293 | static void |
| 4294 | sppp_chap_scr(struct sppp *sp) |
| 4295 | { |
| 4296 | uint32_t *ch; |
| 4297 | u_char clen = 4 * sizeof(uint32_t); |
| 4298 | |
| 4299 | if (sp->hisauth.name == NULL) { |
| 4300 | /* can't do anything useful */ |
| 4301 | printf("%s: chap starting without his name being set\n" , |
| 4302 | sp->pp_if.if_xname); |
| 4303 | return; |
| 4304 | } |
| 4305 | |
| 4306 | /* Compute random challenge. */ |
| 4307 | ch = (uint32_t *)sp->hisauth.challenge; |
| 4308 | cprng_strong(kern_cprng, ch, clen, 0); |
| 4309 | |
| 4310 | sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; |
| 4311 | |
| 4312 | sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], |
| 4313 | sizeof clen, (const char *)&clen, |
| 4314 | sizeof(sp->hisauth.challenge), sp->hisauth.challenge, |
| 4315 | 0); |
| 4316 | } |
| 4317 | |
| 4318 | /* |
| 4319 | *--------------------------------------------------------------------------* |
| 4320 | * * |
| 4321 | * The PAP implementation. * |
| 4322 | * * |
| 4323 | *--------------------------------------------------------------------------* |
| 4324 | */ |
| 4325 | /* |
| 4326 | * For PAP, we need to keep a little state also if we are the peer, not the |
| 4327 | * authenticator. This is since we don't get a request to authenticate, but |
| 4328 | * have to repeatedly authenticate ourself until we got a response (or the |
| 4329 | * retry counter is expired). |
| 4330 | */ |
| 4331 | |
| 4332 | /* |
| 4333 | * Handle incoming PAP packets. */ |
| 4334 | static void |
| 4335 | sppp_pap_input(struct sppp *sp, struct mbuf *m) |
| 4336 | { |
| 4337 | STDDCL; |
| 4338 | struct lcp_header *h; |
| 4339 | int len, x; |
| 4340 | u_char mlen; |
| 4341 | char *name, *secret; |
| 4342 | int name_len, secret_len; |
| 4343 | |
| 4344 | /* |
| 4345 | * Malicious input might leave this uninitialized, so |
| 4346 | * init to an impossible value. |
| 4347 | */ |
| 4348 | secret_len = -1; |
| 4349 | |
| 4350 | len = m->m_pkthdr.len; |
| 4351 | if (len < 5) { |
| 4352 | if (debug) |
| 4353 | log(LOG_DEBUG, |
| 4354 | "%s: pap invalid packet length: %d bytes\n" , |
| 4355 | ifp->if_xname, len); |
| 4356 | return; |
| 4357 | } |
| 4358 | h = mtod(m, struct lcp_header *); |
| 4359 | if (len > ntohs(h->len)) |
| 4360 | len = ntohs(h->len); |
| 4361 | switch (h->type) { |
| 4362 | /* PAP request is my authproto */ |
| 4363 | case PAP_REQ: |
| 4364 | if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { |
| 4365 | /* can't do anything useful */ |
| 4366 | printf("%s: pap request without his name and his secret being set\n" , |
| 4367 | ifp->if_xname); |
| 4368 | break; |
| 4369 | } |
| 4370 | name = 1 + (u_char *)(h + 1); |
| 4371 | name_len = name[-1]; |
| 4372 | secret = name + name_len + 1; |
| 4373 | if (name_len > len - 6 || |
| 4374 | (secret_len = secret[-1]) > len - 6 - name_len) { |
| 4375 | if (debug) { |
| 4376 | log(LOG_DEBUG, "%s: pap corrupted input " |
| 4377 | "<%s id=0x%x len=%d" , |
| 4378 | ifp->if_xname, |
| 4379 | sppp_auth_type_name(PPP_PAP, h->type), |
| 4380 | h->ident, ntohs(h->len)); |
| 4381 | if (len > 4) |
| 4382 | sppp_print_bytes((u_char *)(h + 1), |
| 4383 | len - 4); |
| 4384 | addlog(">\n" ); |
| 4385 | } |
| 4386 | break; |
| 4387 | } |
| 4388 | if (debug) { |
| 4389 | log(LOG_DEBUG, "%s: pap input(%s) " |
| 4390 | "<%s id=0x%x len=%d name=" , |
| 4391 | ifp->if_xname, |
| 4392 | sppp_state_name(sp->state[IDX_PAP]), |
| 4393 | sppp_auth_type_name(PPP_PAP, h->type), |
| 4394 | h->ident, ntohs(h->len)); |
| 4395 | sppp_print_string((char *)name, name_len); |
| 4396 | addlog(" secret=" ); |
| 4397 | sppp_print_string((char *)secret, secret_len); |
| 4398 | addlog(">\n" ); |
| 4399 | } |
| 4400 | if (name_len != sp->hisauth.name_len || |
| 4401 | secret_len != sp->hisauth.secret_len || |
| 4402 | memcmp(name, sp->hisauth.name, name_len) != 0 || |
| 4403 | memcmp(secret, sp->hisauth.secret, secret_len) != 0) { |
| 4404 | /* action scn, tld */ |
| 4405 | sp->pp_auth_failures++; |
| 4406 | mlen = sizeof(FAILMSG) - 1; |
| 4407 | sppp_auth_send(&pap, sp, PAP_NAK, h->ident, |
| 4408 | sizeof mlen, (const char *)&mlen, |
| 4409 | sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, |
| 4410 | 0); |
| 4411 | pap.tld(sp); |
| 4412 | break; |
| 4413 | } |
| 4414 | /* action sca, perhaps tlu */ |
| 4415 | if (sp->state[IDX_PAP] == STATE_REQ_SENT || |
| 4416 | sp->state[IDX_PAP] == STATE_OPENED) { |
| 4417 | mlen = sizeof(SUCCMSG) - 1; |
| 4418 | sppp_auth_send(&pap, sp, PAP_ACK, h->ident, |
| 4419 | sizeof mlen, (const char *)&mlen, |
| 4420 | sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, |
| 4421 | 0); |
| 4422 | } |
| 4423 | if (sp->state[IDX_PAP] == STATE_REQ_SENT) { |
| 4424 | sppp_cp_change_state(&pap, sp, STATE_OPENED); |
| 4425 | pap.tlu(sp); |
| 4426 | } |
| 4427 | break; |
| 4428 | |
| 4429 | /* ack and nak are his authproto */ |
| 4430 | case PAP_ACK: |
| 4431 | callout_stop(&sp->pap_my_to_ch); |
| 4432 | if (debug) { |
| 4433 | log(LOG_DEBUG, "%s: pap success" , |
| 4434 | ifp->if_xname); |
| 4435 | name = 1 + (u_char *)(h + 1); |
| 4436 | name_len = name[-1]; |
| 4437 | if (len > 5 && name_len < len+4) { |
| 4438 | addlog(": " ); |
| 4439 | sppp_print_string(name, name_len); |
| 4440 | } |
| 4441 | addlog("\n" ); |
| 4442 | } |
| 4443 | x = splnet(); |
| 4444 | sp->pp_auth_failures = 0; |
| 4445 | sp->pp_flags &= ~PP_NEEDAUTH; |
| 4446 | if (sp->myauth.proto == PPP_PAP && |
| 4447 | (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && |
| 4448 | (sp->lcp.protos & (1 << IDX_PAP)) == 0) { |
| 4449 | /* |
| 4450 | * We are authenticator for PAP but didn't |
| 4451 | * complete yet. Leave it to tlu to proceed |
| 4452 | * to network phase. |
| 4453 | */ |
| 4454 | splx(x); |
| 4455 | break; |
| 4456 | } |
| 4457 | splx(x); |
| 4458 | sppp_phase_network(sp); |
| 4459 | break; |
| 4460 | |
| 4461 | case PAP_NAK: |
| 4462 | callout_stop(&sp->pap_my_to_ch); |
| 4463 | sp->pp_auth_failures++; |
| 4464 | if (debug) { |
| 4465 | log(LOG_INFO, "%s: pap failure" , |
| 4466 | ifp->if_xname); |
| 4467 | name = 1 + (u_char *)(h + 1); |
| 4468 | name_len = name[-1]; |
| 4469 | if (len > 5 && name_len < len+4) { |
| 4470 | addlog(": " ); |
| 4471 | sppp_print_string(name, name_len); |
| 4472 | } |
| 4473 | addlog("\n" ); |
| 4474 | } else |
| 4475 | log(LOG_INFO, "%s: pap failure\n" , |
| 4476 | ifp->if_xname); |
| 4477 | /* await LCP shutdown by authenticator */ |
| 4478 | break; |
| 4479 | |
| 4480 | default: |
| 4481 | /* Unknown PAP packet type -- ignore. */ |
| 4482 | if (debug) { |
| 4483 | log(LOG_DEBUG, "%s: pap corrupted input " |
| 4484 | "<0x%x id=0x%x len=%d" , |
| 4485 | ifp->if_xname, |
| 4486 | h->type, h->ident, ntohs(h->len)); |
| 4487 | if (len > 4) |
| 4488 | sppp_print_bytes((u_char *)(h + 1), len - 4); |
| 4489 | addlog(">\n" ); |
| 4490 | } |
| 4491 | break; |
| 4492 | |
| 4493 | } |
| 4494 | } |
| 4495 | |
| 4496 | static void |
| 4497 | sppp_pap_init(struct sppp *sp) |
| 4498 | { |
| 4499 | /* PAP doesn't have STATE_INITIAL at all. */ |
| 4500 | sp->state[IDX_PAP] = STATE_CLOSED; |
| 4501 | sp->fail_counter[IDX_PAP] = 0; |
| 4502 | sp->pp_seq[IDX_PAP] = 0; |
| 4503 | sp->pp_rseq[IDX_PAP] = 0; |
| 4504 | callout_init(&sp->ch[IDX_PAP], 0); |
| 4505 | callout_init(&sp->pap_my_to_ch, 0); |
| 4506 | } |
| 4507 | |
| 4508 | static void |
| 4509 | sppp_pap_open(struct sppp *sp) |
| 4510 | { |
| 4511 | if (sp->hisauth.proto == PPP_PAP && |
| 4512 | (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { |
| 4513 | /* we are authenticator for PAP, start our timer */ |
| 4514 | sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; |
| 4515 | sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); |
| 4516 | } |
| 4517 | if (sp->myauth.proto == PPP_PAP) { |
| 4518 | /* we are peer, send a request, and start a timer */ |
| 4519 | pap.scr(sp); |
| 4520 | callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, |
| 4521 | sppp_pap_my_TO, sp); |
| 4522 | } |
| 4523 | } |
| 4524 | |
| 4525 | static void |
| 4526 | sppp_pap_close(struct sppp *sp) |
| 4527 | { |
| 4528 | if (sp->state[IDX_PAP] != STATE_CLOSED) |
| 4529 | sppp_cp_change_state(&pap, sp, STATE_CLOSED); |
| 4530 | } |
| 4531 | |
| 4532 | /* |
| 4533 | * That's the timeout routine if we are authenticator. Since the |
| 4534 | * authenticator is basically passive in PAP, we can't do much here. |
| 4535 | */ |
| 4536 | static void |
| 4537 | sppp_pap_TO(void *cookie) |
| 4538 | { |
| 4539 | struct sppp *sp = (struct sppp *)cookie; |
| 4540 | STDDCL; |
| 4541 | int s; |
| 4542 | |
| 4543 | s = splnet(); |
| 4544 | if (debug) |
| 4545 | log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n" , |
| 4546 | ifp->if_xname, |
| 4547 | sppp_state_name(sp->state[IDX_PAP]), |
| 4548 | sp->rst_counter[IDX_PAP]); |
| 4549 | |
| 4550 | if (--sp->rst_counter[IDX_PAP] < 0) |
| 4551 | /* TO- event */ |
| 4552 | switch (sp->state[IDX_PAP]) { |
| 4553 | case STATE_REQ_SENT: |
| 4554 | pap.tld(sp); |
| 4555 | sppp_cp_change_state(&pap, sp, STATE_CLOSED); |
| 4556 | break; |
| 4557 | } |
| 4558 | else |
| 4559 | /* TO+ event, not very much we could do */ |
| 4560 | switch (sp->state[IDX_PAP]) { |
| 4561 | case STATE_REQ_SENT: |
| 4562 | /* sppp_cp_change_state() will restart the timer */ |
| 4563 | sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); |
| 4564 | break; |
| 4565 | } |
| 4566 | |
| 4567 | splx(s); |
| 4568 | } |
| 4569 | |
| 4570 | /* |
| 4571 | * That's the timeout handler if we are peer. Since the peer is active, |
| 4572 | * we need to retransmit our PAP request since it is apparently lost. |
| 4573 | * XXX We should impose a max counter. |
| 4574 | */ |
| 4575 | static void |
| 4576 | sppp_pap_my_TO(void *cookie) |
| 4577 | { |
| 4578 | struct sppp *sp = (struct sppp *)cookie; |
| 4579 | STDDCL; |
| 4580 | |
| 4581 | if (debug) |
| 4582 | log(LOG_DEBUG, "%s: pap peer TO\n" , |
| 4583 | ifp->if_xname); |
| 4584 | |
| 4585 | pap.scr(sp); |
| 4586 | } |
| 4587 | |
| 4588 | static void |
| 4589 | sppp_pap_tlu(struct sppp *sp) |
| 4590 | { |
| 4591 | STDDCL; |
| 4592 | int x; |
| 4593 | |
| 4594 | sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; |
| 4595 | |
| 4596 | if (debug) |
| 4597 | log(LOG_DEBUG, "%s: %s tlu\n" , |
| 4598 | ifp->if_xname, pap.name); |
| 4599 | |
| 4600 | x = splnet(); |
| 4601 | sp->pp_auth_failures = 0; |
| 4602 | /* indicate to LCP that we need to be closed down */ |
| 4603 | sp->lcp.protos |= (1 << IDX_PAP); |
| 4604 | |
| 4605 | if (sp->pp_flags & PP_NEEDAUTH) { |
| 4606 | /* |
| 4607 | * Remote is authenticator, but his auth proto didn't |
| 4608 | * complete yet. Defer the transition to network |
| 4609 | * phase. |
| 4610 | */ |
| 4611 | splx(x); |
| 4612 | return; |
| 4613 | } |
| 4614 | splx(x); |
| 4615 | sppp_phase_network(sp); |
| 4616 | } |
| 4617 | |
| 4618 | static void |
| 4619 | sppp_pap_tld(struct sppp *sp) |
| 4620 | { |
| 4621 | STDDCL; |
| 4622 | |
| 4623 | if (debug) |
| 4624 | log(LOG_DEBUG, "%s: pap tld\n" , ifp->if_xname); |
| 4625 | callout_stop(&sp->ch[IDX_PAP]); |
| 4626 | callout_stop(&sp->pap_my_to_ch); |
| 4627 | sp->lcp.protos &= ~(1 << IDX_PAP); |
| 4628 | |
| 4629 | lcp.Close(sp); |
| 4630 | } |
| 4631 | |
| 4632 | static void |
| 4633 | sppp_pap_scr(struct sppp *sp) |
| 4634 | { |
| 4635 | u_char idlen, pwdlen; |
| 4636 | |
| 4637 | if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { |
| 4638 | /* can't do anything useful */ |
| 4639 | printf("%s: pap starting without my name and secret being set\n" , |
| 4640 | sp->pp_if.if_xname); |
| 4641 | return; |
| 4642 | } |
| 4643 | |
| 4644 | sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; |
| 4645 | pwdlen = sp->myauth.secret_len; |
| 4646 | idlen = sp->myauth.name_len; |
| 4647 | |
| 4648 | sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], |
| 4649 | sizeof idlen, (const char *)&idlen, |
| 4650 | idlen, sp->myauth.name, |
| 4651 | sizeof pwdlen, (const char *)&pwdlen, |
| 4652 | pwdlen, sp->myauth.secret, |
| 4653 | 0); |
| 4654 | } |
| 4655 | |
| 4656 | /* |
| 4657 | * Random miscellaneous functions. |
| 4658 | */ |
| 4659 | |
| 4660 | /* |
| 4661 | * Send a PAP or CHAP proto packet. |
| 4662 | * |
| 4663 | * Varadic function, each of the elements for the ellipsis is of type |
| 4664 | * ``size_t mlen, const u_char *msg''. Processing will stop iff |
| 4665 | * mlen == 0. |
| 4666 | * NOTE: never declare variadic functions with types subject to type |
| 4667 | * promotion (i.e. u_char). This is asking for big trouble depending |
| 4668 | * on the architecture you are on... |
| 4669 | */ |
| 4670 | |
| 4671 | static void |
| 4672 | sppp_auth_send(const struct cp *cp, struct sppp *sp, |
| 4673 | unsigned int type, unsigned int id, |
| 4674 | ...) |
| 4675 | { |
| 4676 | STDDCL; |
| 4677 | struct lcp_header *lh; |
| 4678 | struct mbuf *m; |
| 4679 | u_char *p; |
| 4680 | int len; |
| 4681 | size_t pkthdrlen; |
| 4682 | unsigned int mlen; |
| 4683 | const char *msg; |
| 4684 | va_list ap; |
| 4685 | |
| 4686 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 4687 | if (! m) |
| 4688 | return; |
| 4689 | m_reset_rcvif(m); |
| 4690 | |
| 4691 | if (sp->pp_flags & PP_NOFRAMING) { |
| 4692 | *mtod(m, uint16_t *) = htons(cp->proto); |
| 4693 | pkthdrlen = 2; |
| 4694 | lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); |
| 4695 | } else { |
| 4696 | struct ppp_header *h; |
| 4697 | h = mtod(m, struct ppp_header *); |
| 4698 | h->address = PPP_ALLSTATIONS; /* broadcast address */ |
| 4699 | h->control = PPP_UI; /* Unnumbered Info */ |
| 4700 | h->protocol = htons(cp->proto); |
| 4701 | pkthdrlen = PPP_HEADER_LEN; |
| 4702 | |
| 4703 | lh = (struct lcp_header *)(h + 1); |
| 4704 | } |
| 4705 | |
| 4706 | lh->type = type; |
| 4707 | lh->ident = id; |
| 4708 | p = (u_char *)(lh + 1); |
| 4709 | |
| 4710 | va_start(ap, id); |
| 4711 | len = 0; |
| 4712 | |
| 4713 | while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { |
| 4714 | msg = va_arg(ap, const char *); |
| 4715 | len += mlen; |
| 4716 | if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { |
| 4717 | va_end(ap); |
| 4718 | m_freem(m); |
| 4719 | return; |
| 4720 | } |
| 4721 | |
| 4722 | memcpy(p, msg, mlen); |
| 4723 | p += mlen; |
| 4724 | } |
| 4725 | va_end(ap); |
| 4726 | |
| 4727 | m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; |
| 4728 | lh->len = htons(LCP_HEADER_LEN + len); |
| 4729 | |
| 4730 | if (debug) { |
| 4731 | log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d" , |
| 4732 | ifp->if_xname, cp->name, |
| 4733 | sppp_auth_type_name(cp->proto, lh->type), |
| 4734 | lh->ident, ntohs(lh->len)); |
| 4735 | if (len) |
| 4736 | sppp_print_bytes((u_char *)(lh + 1), len); |
| 4737 | addlog(">\n" ); |
| 4738 | } |
| 4739 | if (IF_QFULL(&sp->pp_cpq)) { |
| 4740 | IF_DROP(&sp->pp_fastq); |
| 4741 | IF_DROP(&ifp->if_snd); |
| 4742 | m_freem(m); |
| 4743 | ++ifp->if_oerrors; |
| 4744 | return; |
| 4745 | } else |
| 4746 | IF_ENQUEUE(&sp->pp_cpq, m); |
| 4747 | if (! (ifp->if_flags & IFF_OACTIVE)) |
| 4748 | if_start_lock(ifp); |
| 4749 | ifp->if_obytes += m->m_pkthdr.len + 3; |
| 4750 | } |
| 4751 | |
| 4752 | /* |
| 4753 | * Send keepalive packets, every 10 seconds. |
| 4754 | */ |
| 4755 | static void |
| 4756 | sppp_keepalive(void *dummy) |
| 4757 | { |
| 4758 | struct sppp *sp; |
| 4759 | int s; |
| 4760 | time_t now; |
| 4761 | |
| 4762 | s = splnet(); |
| 4763 | now = time_uptime; |
| 4764 | for (sp=spppq; sp; sp=sp->pp_next) { |
| 4765 | struct ifnet *ifp = &sp->pp_if; |
| 4766 | |
| 4767 | /* check idle timeout */ |
| 4768 | if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) |
| 4769 | && (sp->pp_phase == SPPP_PHASE_NETWORK)) { |
| 4770 | /* idle timeout is enabled for this interface */ |
| 4771 | if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { |
| 4772 | if (ifp->if_flags & IFF_DEBUG) |
| 4773 | printf("%s: no activity for %lu seconds\n" , |
| 4774 | sp->pp_if.if_xname, |
| 4775 | (unsigned long)(now-sp->pp_last_activity)); |
| 4776 | lcp.Close(sp); |
| 4777 | continue; |
| 4778 | } |
| 4779 | } |
| 4780 | |
| 4781 | /* Keepalive mode disabled or channel down? */ |
| 4782 | if (! (sp->pp_flags & PP_KEEPALIVE) || |
| 4783 | ! (ifp->if_flags & IFF_RUNNING)) |
| 4784 | continue; |
| 4785 | |
| 4786 | /* No keepalive in PPP mode if LCP not opened yet. */ |
| 4787 | if (! (sp->pp_flags & PP_CISCO) && |
| 4788 | sp->pp_phase < SPPP_PHASE_AUTHENTICATE) |
| 4789 | continue; |
| 4790 | |
| 4791 | /* No echo reply, but maybe user data passed through? */ |
| 4792 | if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { |
| 4793 | sp->pp_alivecnt = 0; |
| 4794 | continue; |
| 4795 | } |
| 4796 | |
| 4797 | if (sp->pp_alivecnt >= sp->pp_maxalive) { |
| 4798 | /* No keepalive packets got. Stop the interface. */ |
| 4799 | if_down (ifp); |
| 4800 | IF_PURGE(&sp->pp_cpq); |
| 4801 | if (! (sp->pp_flags & PP_CISCO)) { |
| 4802 | printf("%s: LCP keepalive timed out, going to restart the connection\n" , |
| 4803 | ifp->if_xname); |
| 4804 | sp->pp_alivecnt = 0; |
| 4805 | |
| 4806 | /* we are down, close all open protocols */ |
| 4807 | lcp.Close(sp); |
| 4808 | |
| 4809 | /* And now prepare LCP to reestablish the link, if configured to do so. */ |
| 4810 | sppp_cp_change_state(&lcp, sp, STATE_STOPPED); |
| 4811 | |
| 4812 | /* Close connection immediately, completition of this |
| 4813 | * will summon the magic needed to reestablish it. */ |
| 4814 | if (sp->pp_tlf) |
| 4815 | sp->pp_tlf(sp); |
| 4816 | continue; |
| 4817 | } |
| 4818 | } |
| 4819 | if (sp->pp_alivecnt < sp->pp_maxalive) |
| 4820 | ++sp->pp_alivecnt; |
| 4821 | if (sp->pp_flags & PP_CISCO) |
| 4822 | sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, |
| 4823 | ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); |
| 4824 | else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { |
| 4825 | int32_t nmagic = htonl(sp->lcp.magic); |
| 4826 | sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; |
| 4827 | sppp_cp_send(sp, PPP_LCP, ECHO_REQ, |
| 4828 | sp->lcp.echoid, 4, &nmagic); |
| 4829 | } |
| 4830 | } |
| 4831 | splx(s); |
| 4832 | callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); |
| 4833 | } |
| 4834 | |
| 4835 | #ifdef INET |
| 4836 | /* |
| 4837 | * Get both IP addresses. |
| 4838 | */ |
| 4839 | static void |
| 4840 | sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) |
| 4841 | { |
| 4842 | struct ifnet *ifp = &sp->pp_if; |
| 4843 | struct ifaddr *ifa; |
| 4844 | struct sockaddr_in *si, *sm; |
| 4845 | uint32_t ssrc, ddst; |
| 4846 | |
| 4847 | sm = NULL; |
| 4848 | ssrc = ddst = 0; |
| 4849 | /* |
| 4850 | * Pick the first AF_INET address from the list, |
| 4851 | * aliases don't make any sense on a p2p link anyway. |
| 4852 | */ |
| 4853 | si = 0; |
| 4854 | IFADDR_READER_FOREACH(ifa, ifp) { |
| 4855 | if (ifa->ifa_addr->sa_family == AF_INET) { |
| 4856 | si = (struct sockaddr_in *)ifa->ifa_addr; |
| 4857 | sm = (struct sockaddr_in *)ifa->ifa_netmask; |
| 4858 | if (si) |
| 4859 | break; |
| 4860 | } |
| 4861 | } |
| 4862 | if (ifa) { |
| 4863 | if (si && si->sin_addr.s_addr) { |
| 4864 | ssrc = si->sin_addr.s_addr; |
| 4865 | if (srcmask) |
| 4866 | *srcmask = ntohl(sm->sin_addr.s_addr); |
| 4867 | } |
| 4868 | |
| 4869 | si = (struct sockaddr_in *)ifa->ifa_dstaddr; |
| 4870 | if (si && si->sin_addr.s_addr) |
| 4871 | ddst = si->sin_addr.s_addr; |
| 4872 | } |
| 4873 | |
| 4874 | if (dst) *dst = ntohl(ddst); |
| 4875 | if (src) *src = ntohl(ssrc); |
| 4876 | } |
| 4877 | |
| 4878 | /* |
| 4879 | * Set IP addresses. Must be called at splnet. |
| 4880 | * If an address is 0, leave it the way it is. |
| 4881 | */ |
| 4882 | static void |
| 4883 | sppp_set_ip_addrs(struct sppp *sp, uint32_t myaddr, uint32_t hisaddr) |
| 4884 | { |
| 4885 | STDDCL; |
| 4886 | struct ifaddr *ifa; |
| 4887 | struct sockaddr_in *si, *dest; |
| 4888 | |
| 4889 | /* |
| 4890 | * Pick the first AF_INET address from the list, |
| 4891 | * aliases don't make any sense on a p2p link anyway. |
| 4892 | */ |
| 4893 | |
| 4894 | IFADDR_READER_FOREACH(ifa, ifp) { |
| 4895 | if (ifa->ifa_addr->sa_family == AF_INET) { |
| 4896 | si = (struct sockaddr_in *)ifa->ifa_addr; |
| 4897 | dest = (struct sockaddr_in *)ifa->ifa_dstaddr; |
| 4898 | goto found; |
| 4899 | } |
| 4900 | } |
| 4901 | return; |
| 4902 | |
| 4903 | found: |
| 4904 | { |
| 4905 | int error; |
| 4906 | struct sockaddr_in new_sin = *si; |
| 4907 | struct sockaddr_in new_dst = *dest; |
| 4908 | |
| 4909 | if (myaddr != 0) |
| 4910 | new_sin.sin_addr.s_addr = htonl(myaddr); |
| 4911 | if (hisaddr != 0) { |
| 4912 | new_dst.sin_addr.s_addr = htonl(hisaddr); |
| 4913 | if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) |
| 4914 | sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; |
| 4915 | } |
| 4916 | |
| 4917 | LIST_REMOVE(ifatoia(ifa), ia_hash); |
| 4918 | IN_ADDRHASH_WRITER_REMOVE(ifatoia(ifa)); |
| 4919 | #ifdef NET_MPSAFE |
| 4920 | pserialize_perform(in_ifaddrhash_psz); |
| 4921 | #endif |
| 4922 | IN_ADDRHASH_ENTRY_DESTROY(ifatoia(ifa)); |
| 4923 | |
| 4924 | error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); |
| 4925 | |
| 4926 | IN_ADDRHASH_ENTRY_INIT(ifatoia(ifa)); |
| 4927 | LIST_INSERT_HEAD(&IN_IFADDR_HASH(ifatoia(ifa)->ia_addr.sin_addr.s_addr), |
| 4928 | ifatoia(ifa), ia_hash); |
| 4929 | IN_ADDRHASH_WRITER_INSERT_HEAD(ifatoia(ifa)); |
| 4930 | |
| 4931 | if (debug && error) |
| 4932 | { |
| 4933 | log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n" , |
| 4934 | ifp->if_xname, __func__, error); |
| 4935 | } |
| 4936 | if (!error) { |
| 4937 | (void)pfil_run_hooks(if_pfil, |
| 4938 | (struct mbuf **)SIOCAIFADDR, ifp, PFIL_IFADDR); |
| 4939 | } |
| 4940 | } |
| 4941 | } |
| 4942 | |
| 4943 | /* |
| 4944 | * Clear IP addresses. Must be called at splnet. |
| 4945 | */ |
| 4946 | static void |
| 4947 | sppp_clear_ip_addrs(struct sppp *sp) |
| 4948 | { |
| 4949 | STDDCL; |
| 4950 | struct ifaddr *ifa; |
| 4951 | struct sockaddr_in *si, *dest; |
| 4952 | |
| 4953 | uint32_t remote; |
| 4954 | if (sp->ipcp.flags & IPCP_HISADDR_DYN) |
| 4955 | remote = sp->ipcp.saved_hisaddr; |
| 4956 | else |
| 4957 | sppp_get_ip_addrs(sp, 0, &remote, 0); |
| 4958 | |
| 4959 | /* |
| 4960 | * Pick the first AF_INET address from the list, |
| 4961 | * aliases don't make any sense on a p2p link anyway. |
| 4962 | */ |
| 4963 | |
| 4964 | IFADDR_READER_FOREACH(ifa, ifp) { |
| 4965 | if (ifa->ifa_addr->sa_family == AF_INET) { |
| 4966 | si = (struct sockaddr_in *)ifa->ifa_addr; |
| 4967 | dest = (struct sockaddr_in *)ifa->ifa_dstaddr; |
| 4968 | goto found; |
| 4969 | } |
| 4970 | } |
| 4971 | return; |
| 4972 | |
| 4973 | found: |
| 4974 | { |
| 4975 | struct sockaddr_in new_sin = *si; |
| 4976 | struct sockaddr_in new_dst = *dest; |
| 4977 | int error; |
| 4978 | |
| 4979 | if (sp->ipcp.flags & IPCP_MYADDR_DYN) |
| 4980 | new_sin.sin_addr.s_addr = 0; |
| 4981 | if (sp->ipcp.flags & IPCP_HISADDR_DYN) |
| 4982 | new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; |
| 4983 | |
| 4984 | LIST_REMOVE(ifatoia(ifa), ia_hash); |
| 4985 | IN_ADDRHASH_WRITER_REMOVE(ifatoia(ifa)); |
| 4986 | #ifdef NET_MPSAFE |
| 4987 | pserialize_perform(in_ifaddrhash_psz); |
| 4988 | #endif |
| 4989 | IN_ADDRHASH_ENTRY_DESTROY(ifatoia(ifa)); |
| 4990 | |
| 4991 | error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); |
| 4992 | |
| 4993 | IN_ADDRHASH_ENTRY_INIT(ifatoia(ifa)); |
| 4994 | LIST_INSERT_HEAD(&IN_IFADDR_HASH(ifatoia(ifa)->ia_addr.sin_addr.s_addr), |
| 4995 | ifatoia(ifa), ia_hash); |
| 4996 | IN_ADDRHASH_WRITER_INSERT_HEAD(ifatoia(ifa)); |
| 4997 | |
| 4998 | if (debug && error) |
| 4999 | { |
| 5000 | log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n" , |
| 5001 | ifp->if_xname, __func__, error); |
| 5002 | } |
| 5003 | if (!error) { |
| 5004 | (void)pfil_run_hooks(if_pfil, |
| 5005 | (struct mbuf **)SIOCAIFADDR, ifp, PFIL_IFADDR); |
| 5006 | } |
| 5007 | } |
| 5008 | } |
| 5009 | #endif |
| 5010 | |
| 5011 | #ifdef INET6 |
| 5012 | /* |
| 5013 | * Get both IPv6 addresses. |
| 5014 | */ |
| 5015 | static void |
| 5016 | sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, |
| 5017 | struct in6_addr *srcmask) |
| 5018 | { |
| 5019 | struct ifnet *ifp = &sp->pp_if; |
| 5020 | struct ifaddr *ifa; |
| 5021 | struct sockaddr_in6 *si, *sm; |
| 5022 | struct in6_addr ssrc, ddst; |
| 5023 | |
| 5024 | sm = NULL; |
| 5025 | memset(&ssrc, 0, sizeof(ssrc)); |
| 5026 | memset(&ddst, 0, sizeof(ddst)); |
| 5027 | /* |
| 5028 | * Pick the first link-local AF_INET6 address from the list, |
| 5029 | * aliases don't make any sense on a p2p link anyway. |
| 5030 | */ |
| 5031 | si = 0; |
| 5032 | IFADDR_READER_FOREACH(ifa, ifp) |
| 5033 | if (ifa->ifa_addr->sa_family == AF_INET6) { |
| 5034 | si = (struct sockaddr_in6 *)ifa->ifa_addr; |
| 5035 | sm = (struct sockaddr_in6 *)ifa->ifa_netmask; |
| 5036 | if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) |
| 5037 | break; |
| 5038 | } |
| 5039 | if (ifa) { |
| 5040 | if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { |
| 5041 | memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); |
| 5042 | if (srcmask) { |
| 5043 | memcpy(srcmask, &sm->sin6_addr, |
| 5044 | sizeof(*srcmask)); |
| 5045 | } |
| 5046 | } |
| 5047 | |
| 5048 | si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; |
| 5049 | if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) |
| 5050 | memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); |
| 5051 | } |
| 5052 | |
| 5053 | if (dst) |
| 5054 | memcpy(dst, &ddst, sizeof(*dst)); |
| 5055 | if (src) |
| 5056 | memcpy(src, &ssrc, sizeof(*src)); |
| 5057 | } |
| 5058 | |
| 5059 | #ifdef IPV6CP_MYIFID_DYN |
| 5060 | /* |
| 5061 | * Generate random ifid. |
| 5062 | */ |
| 5063 | static void |
| 5064 | sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) |
| 5065 | { |
| 5066 | /* TBD */ |
| 5067 | } |
| 5068 | |
| 5069 | /* |
| 5070 | * Set my IPv6 address. Must be called at splnet. |
| 5071 | */ |
| 5072 | static void |
| 5073 | sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) |
| 5074 | { |
| 5075 | STDDCL; |
| 5076 | struct ifaddr *ifa; |
| 5077 | struct sockaddr_in6 *sin6; |
| 5078 | |
| 5079 | /* |
| 5080 | * Pick the first link-local AF_INET6 address from the list, |
| 5081 | * aliases don't make any sense on a p2p link anyway. |
| 5082 | */ |
| 5083 | |
| 5084 | sin6 = NULL; |
| 5085 | IFADDR_READER_FOREACH(ifa, ifp) |
| 5086 | { |
| 5087 | if (ifa->ifa_addr->sa_family == AF_INET6) |
| 5088 | { |
| 5089 | sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; |
| 5090 | if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) |
| 5091 | break; |
| 5092 | } |
| 5093 | } |
| 5094 | |
| 5095 | if (ifa && sin6) |
| 5096 | { |
| 5097 | int error; |
| 5098 | struct sockaddr_in6 new_sin6 = *sin6; |
| 5099 | |
| 5100 | memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); |
| 5101 | error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); |
| 5102 | if (debug && error) |
| 5103 | { |
| 5104 | log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n" , |
| 5105 | ifp->if_xname, __func__, error); |
| 5106 | } |
| 5107 | if (!error) { |
| 5108 | (void)pfil_run_hooks(if_pfil, |
| 5109 | (struct mbuf **)SIOCAIFADDR_IN6, ifp, PFIL_IFADDR); |
| 5110 | } |
| 5111 | } |
| 5112 | } |
| 5113 | #endif |
| 5114 | |
| 5115 | /* |
| 5116 | * Suggest a candidate address to be used by peer. |
| 5117 | */ |
| 5118 | static void |
| 5119 | sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) |
| 5120 | { |
| 5121 | struct in6_addr myaddr; |
| 5122 | struct timeval tv; |
| 5123 | |
| 5124 | sppp_get_ip6_addrs(sp, &myaddr, 0, 0); |
| 5125 | |
| 5126 | myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ |
| 5127 | microtime(&tv); |
| 5128 | if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { |
| 5129 | myaddr.s6_addr[14] ^= 0xff; |
| 5130 | myaddr.s6_addr[15] ^= 0xff; |
| 5131 | } else { |
| 5132 | myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); |
| 5133 | myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); |
| 5134 | } |
| 5135 | if (suggest) |
| 5136 | memcpy(suggest, &myaddr, sizeof(myaddr)); |
| 5137 | } |
| 5138 | #endif /*INET6*/ |
| 5139 | |
| 5140 | /* |
| 5141 | * Process ioctl requests specific to the PPP interface. |
| 5142 | * Permissions have already been checked. |
| 5143 | */ |
| 5144 | static int |
| 5145 | sppp_params(struct sppp *sp, u_long cmd, void *data) |
| 5146 | { |
| 5147 | switch (cmd) { |
| 5148 | case SPPPGETAUTHCFG: |
| 5149 | { |
| 5150 | struct spppauthcfg *cfg = (struct spppauthcfg *)data; |
| 5151 | int error; |
| 5152 | size_t len; |
| 5153 | |
| 5154 | cfg->myauthflags = sp->myauth.flags; |
| 5155 | cfg->hisauthflags = sp->hisauth.flags; |
| 5156 | strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); |
| 5157 | cfg->hisauth = 0; |
| 5158 | if (sp->hisauth.proto) |
| 5159 | cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; |
| 5160 | cfg->myauth = 0; |
| 5161 | if (sp->myauth.proto) |
| 5162 | cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; |
| 5163 | if (cfg->myname_length == 0) { |
| 5164 | if (sp->myauth.name != NULL) |
| 5165 | cfg->myname_length = sp->myauth.name_len + 1; |
| 5166 | } else { |
| 5167 | if (sp->myauth.name == NULL) { |
| 5168 | cfg->myname_length = 0; |
| 5169 | } else { |
| 5170 | len = sp->myauth.name_len + 1; |
| 5171 | if (cfg->myname_length < len) |
| 5172 | return (ENAMETOOLONG); |
| 5173 | error = copyout(sp->myauth.name, cfg->myname, len); |
| 5174 | if (error) return error; |
| 5175 | } |
| 5176 | } |
| 5177 | if (cfg->hisname_length == 0) { |
| 5178 | if (sp->hisauth.name != NULL) |
| 5179 | cfg->hisname_length = sp->hisauth.name_len + 1; |
| 5180 | } else { |
| 5181 | if (sp->hisauth.name == NULL) { |
| 5182 | cfg->hisname_length = 0; |
| 5183 | } else { |
| 5184 | len = sp->hisauth.name_len + 1; |
| 5185 | if (cfg->hisname_length < len) |
| 5186 | return (ENAMETOOLONG); |
| 5187 | error = copyout(sp->hisauth.name, cfg->hisname, len); |
| 5188 | if (error) return error; |
| 5189 | } |
| 5190 | } |
| 5191 | } |
| 5192 | break; |
| 5193 | case SPPPSETAUTHCFG: |
| 5194 | { |
| 5195 | struct spppauthcfg *cfg = (struct spppauthcfg *)data; |
| 5196 | int error; |
| 5197 | |
| 5198 | if (sp->myauth.name) { |
| 5199 | free(sp->myauth.name, M_DEVBUF); |
| 5200 | sp->myauth.name = NULL; |
| 5201 | } |
| 5202 | if (sp->myauth.secret) { |
| 5203 | free(sp->myauth.secret, M_DEVBUF); |
| 5204 | sp->myauth.secret = NULL; |
| 5205 | } |
| 5206 | if (sp->hisauth.name) { |
| 5207 | free(sp->hisauth.name, M_DEVBUF); |
| 5208 | sp->hisauth.name = NULL; |
| 5209 | } |
| 5210 | if (sp->hisauth.secret) { |
| 5211 | free(sp->hisauth.secret, M_DEVBUF); |
| 5212 | sp->hisauth.secret = NULL; |
| 5213 | } |
| 5214 | |
| 5215 | if (cfg->hisname != NULL && cfg->hisname_length > 0) { |
| 5216 | if (cfg->hisname_length >= MCLBYTES) |
| 5217 | return (ENAMETOOLONG); |
| 5218 | sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); |
| 5219 | error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); |
| 5220 | if (error) { |
| 5221 | free(sp->hisauth.name, M_DEVBUF); |
| 5222 | sp->hisauth.name = NULL; |
| 5223 | return error; |
| 5224 | } |
| 5225 | sp->hisauth.name_len = cfg->hisname_length - 1; |
| 5226 | sp->hisauth.name[sp->hisauth.name_len] = 0; |
| 5227 | } |
| 5228 | if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { |
| 5229 | if (cfg->hissecret_length >= MCLBYTES) |
| 5230 | return (ENAMETOOLONG); |
| 5231 | sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); |
| 5232 | error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); |
| 5233 | if (error) { |
| 5234 | free(sp->hisauth.secret, M_DEVBUF); |
| 5235 | sp->hisauth.secret = NULL; |
| 5236 | return error; |
| 5237 | } |
| 5238 | sp->hisauth.secret_len = cfg->hissecret_length - 1; |
| 5239 | sp->hisauth.secret[sp->hisauth.secret_len] = 0; |
| 5240 | } |
| 5241 | if (cfg->myname != NULL && cfg->myname_length > 0) { |
| 5242 | if (cfg->myname_length >= MCLBYTES) |
| 5243 | return (ENAMETOOLONG); |
| 5244 | sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); |
| 5245 | error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); |
| 5246 | if (error) { |
| 5247 | free(sp->myauth.name, M_DEVBUF); |
| 5248 | sp->myauth.name = NULL; |
| 5249 | return error; |
| 5250 | } |
| 5251 | sp->myauth.name_len = cfg->myname_length - 1; |
| 5252 | sp->myauth.name[sp->myauth.name_len] = 0; |
| 5253 | } |
| 5254 | if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { |
| 5255 | if (cfg->mysecret_length >= MCLBYTES) |
| 5256 | return (ENAMETOOLONG); |
| 5257 | sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); |
| 5258 | error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); |
| 5259 | if (error) { |
| 5260 | free(sp->myauth.secret, M_DEVBUF); |
| 5261 | sp->myauth.secret = NULL; |
| 5262 | return error; |
| 5263 | } |
| 5264 | sp->myauth.secret_len = cfg->mysecret_length - 1; |
| 5265 | sp->myauth.secret[sp->myauth.secret_len] = 0; |
| 5266 | } |
| 5267 | sp->myauth.flags = cfg->myauthflags; |
| 5268 | if (cfg->myauth) |
| 5269 | sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; |
| 5270 | sp->hisauth.flags = cfg->hisauthflags; |
| 5271 | if (cfg->hisauth) |
| 5272 | sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; |
| 5273 | sp->pp_auth_failures = 0; |
| 5274 | if (sp->hisauth.proto != 0) |
| 5275 | sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); |
| 5276 | else |
| 5277 | sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); |
| 5278 | } |
| 5279 | break; |
| 5280 | case SPPPGETLCPCFG: |
| 5281 | { |
| 5282 | struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; |
| 5283 | lcpp->lcp_timeout = sp->lcp.timeout; |
| 5284 | } |
| 5285 | break; |
| 5286 | case SPPPSETLCPCFG: |
| 5287 | { |
| 5288 | struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; |
| 5289 | sp->lcp.timeout = lcpp->lcp_timeout; |
| 5290 | } |
| 5291 | break; |
| 5292 | case SPPPGETSTATUS: |
| 5293 | { |
| 5294 | struct spppstatus *status = (struct spppstatus *)data; |
| 5295 | status->phase = sp->pp_phase; |
| 5296 | } |
| 5297 | break; |
| 5298 | case SPPPGETSTATUSNCP: |
| 5299 | { |
| 5300 | struct spppstatusncp *status = (struct spppstatusncp *)data; |
| 5301 | status->phase = sp->pp_phase; |
| 5302 | status->ncpup = sppp_ncp_check(sp); |
| 5303 | } |
| 5304 | break; |
| 5305 | case SPPPGETIDLETO: |
| 5306 | { |
| 5307 | struct spppidletimeout *to = (struct spppidletimeout *)data; |
| 5308 | to->idle_seconds = sp->pp_idle_timeout; |
| 5309 | } |
| 5310 | break; |
| 5311 | case SPPPSETIDLETO: |
| 5312 | { |
| 5313 | struct spppidletimeout *to = (struct spppidletimeout *)data; |
| 5314 | sp->pp_idle_timeout = to->idle_seconds; |
| 5315 | } |
| 5316 | break; |
| 5317 | case SPPPSETAUTHFAILURE: |
| 5318 | { |
| 5319 | struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; |
| 5320 | sp->pp_max_auth_fail = afsettings->max_failures; |
| 5321 | sp->pp_auth_failures = 0; |
| 5322 | } |
| 5323 | break; |
| 5324 | case SPPPGETAUTHFAILURES: |
| 5325 | { |
| 5326 | struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; |
| 5327 | stats->auth_failures = sp->pp_auth_failures; |
| 5328 | stats->max_failures = sp->pp_max_auth_fail; |
| 5329 | } |
| 5330 | break; |
| 5331 | case SPPPSETDNSOPTS: |
| 5332 | { |
| 5333 | struct spppdnssettings *req = (struct spppdnssettings *)data; |
| 5334 | sp->query_dns = req->query_dns & 3; |
| 5335 | } |
| 5336 | break; |
| 5337 | case SPPPGETDNSOPTS: |
| 5338 | { |
| 5339 | struct spppdnssettings *req = (struct spppdnssettings *)data; |
| 5340 | req->query_dns = sp->query_dns; |
| 5341 | } |
| 5342 | break; |
| 5343 | case SPPPGETDNSADDRS: |
| 5344 | { |
| 5345 | struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; |
| 5346 | memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); |
| 5347 | } |
| 5348 | break; |
| 5349 | case SPPPGETKEEPALIVE: |
| 5350 | { |
| 5351 | struct spppkeepalivesettings *settings = |
| 5352 | (struct spppkeepalivesettings*)data; |
| 5353 | settings->maxalive = sp->pp_maxalive; |
| 5354 | settings->max_noreceive = sp->pp_max_noreceive; |
| 5355 | } |
| 5356 | break; |
| 5357 | case SPPPSETKEEPALIVE: |
| 5358 | { |
| 5359 | struct spppkeepalivesettings *settings = |
| 5360 | (struct spppkeepalivesettings*)data; |
| 5361 | sp->pp_maxalive = settings->maxalive; |
| 5362 | sp->pp_max_noreceive = settings->max_noreceive; |
| 5363 | } |
| 5364 | break; |
| 5365 | #if defined(COMPAT_50) || defined(MODULAR) |
| 5366 | case __SPPPGETIDLETO50: |
| 5367 | { |
| 5368 | struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; |
| 5369 | to->idle_seconds = (uint32_t)sp->pp_idle_timeout; |
| 5370 | } |
| 5371 | break; |
| 5372 | case __SPPPSETIDLETO50: |
| 5373 | { |
| 5374 | struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; |
| 5375 | sp->pp_idle_timeout = (time_t)to->idle_seconds; |
| 5376 | } |
| 5377 | break; |
| 5378 | case __SPPPGETKEEPALIVE50: |
| 5379 | { |
| 5380 | struct spppkeepalivesettings50 *settings = |
| 5381 | (struct spppkeepalivesettings50*)data; |
| 5382 | settings->maxalive = sp->pp_maxalive; |
| 5383 | settings->max_noreceive = (uint32_t)sp->pp_max_noreceive; |
| 5384 | } |
| 5385 | break; |
| 5386 | case __SPPPSETKEEPALIVE50: |
| 5387 | { |
| 5388 | struct spppkeepalivesettings50 *settings = |
| 5389 | (struct spppkeepalivesettings50*)data; |
| 5390 | sp->pp_maxalive = settings->maxalive; |
| 5391 | sp->pp_max_noreceive = (time_t)settings->max_noreceive; |
| 5392 | } |
| 5393 | break; |
| 5394 | #endif /* COMPAT_50 || MODULAR */ |
| 5395 | default: |
| 5396 | return (EINVAL); |
| 5397 | } |
| 5398 | |
| 5399 | return (0); |
| 5400 | } |
| 5401 | |
| 5402 | static void |
| 5403 | sppp_phase_network(struct sppp *sp) |
| 5404 | { |
| 5405 | int i; |
| 5406 | uint32_t mask; |
| 5407 | |
| 5408 | sppp_change_phase(sp, SPPP_PHASE_NETWORK); |
| 5409 | |
| 5410 | /* Notify NCPs now. */ |
| 5411 | for (i = 0; i < IDX_COUNT; i++) |
| 5412 | if ((cps[i])->flags & CP_NCP) |
| 5413 | (cps[i])->Open(sp); |
| 5414 | |
| 5415 | /* Send Up events to all NCPs. */ |
| 5416 | for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) |
| 5417 | if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) |
| 5418 | (cps[i])->Up(sp); |
| 5419 | |
| 5420 | /* if no NCP is starting, all this was in vain, close down */ |
| 5421 | sppp_lcp_check_and_close(sp); |
| 5422 | } |
| 5423 | |
| 5424 | |
| 5425 | static const char * |
| 5426 | sppp_cp_type_name(u_char type) |
| 5427 | { |
| 5428 | static char buf[12]; |
| 5429 | switch (type) { |
| 5430 | case CONF_REQ: return "conf-req" ; |
| 5431 | case CONF_ACK: return "conf-ack" ; |
| 5432 | case CONF_NAK: return "conf-nak" ; |
| 5433 | case CONF_REJ: return "conf-rej" ; |
| 5434 | case TERM_REQ: return "term-req" ; |
| 5435 | case TERM_ACK: return "term-ack" ; |
| 5436 | case CODE_REJ: return "code-rej" ; |
| 5437 | case PROTO_REJ: return "proto-rej" ; |
| 5438 | case ECHO_REQ: return "echo-req" ; |
| 5439 | case ECHO_REPLY: return "echo-reply" ; |
| 5440 | case DISC_REQ: return "discard-req" ; |
| 5441 | } |
| 5442 | snprintf(buf, sizeof(buf), "0x%x" , type); |
| 5443 | return buf; |
| 5444 | } |
| 5445 | |
| 5446 | static const char * |
| 5447 | sppp_auth_type_name(u_short proto, u_char type) |
| 5448 | { |
| 5449 | static char buf[32]; |
| 5450 | const char *name; |
| 5451 | |
| 5452 | switch (proto) { |
| 5453 | case PPP_CHAP: |
| 5454 | switch (type) { |
| 5455 | case CHAP_CHALLENGE: return "challenge" ; |
| 5456 | case CHAP_RESPONSE: return "response" ; |
| 5457 | case CHAP_SUCCESS: return "success" ; |
| 5458 | case CHAP_FAILURE: return "failure" ; |
| 5459 | default: name = "chap" ; break; |
| 5460 | } |
| 5461 | break; |
| 5462 | |
| 5463 | case PPP_PAP: |
| 5464 | switch (type) { |
| 5465 | case PAP_REQ: return "req" ; |
| 5466 | case PAP_ACK: return "ack" ; |
| 5467 | case PAP_NAK: return "nak" ; |
| 5468 | default: name = "pap" ; break; |
| 5469 | } |
| 5470 | break; |
| 5471 | |
| 5472 | default: |
| 5473 | name = "bad" ; |
| 5474 | break; |
| 5475 | } |
| 5476 | |
| 5477 | snprintf(buf, sizeof(buf), "%s(%#x) %#x" , name, proto, type); |
| 5478 | return buf; |
| 5479 | } |
| 5480 | |
| 5481 | static const char * |
| 5482 | sppp_lcp_opt_name(u_char opt) |
| 5483 | { |
| 5484 | static char buf[12]; |
| 5485 | switch (opt) { |
| 5486 | case LCP_OPT_MRU: return "mru" ; |
| 5487 | case LCP_OPT_ASYNC_MAP: return "async-map" ; |
| 5488 | case LCP_OPT_AUTH_PROTO: return "auth-proto" ; |
| 5489 | case LCP_OPT_QUAL_PROTO: return "qual-proto" ; |
| 5490 | case LCP_OPT_MAGIC: return "magic" ; |
| 5491 | case LCP_OPT_PROTO_COMP: return "proto-comp" ; |
| 5492 | case LCP_OPT_ADDR_COMP: return "addr-comp" ; |
| 5493 | } |
| 5494 | snprintf(buf, sizeof(buf), "0x%x" , opt); |
| 5495 | return buf; |
| 5496 | } |
| 5497 | |
| 5498 | static const char * |
| 5499 | sppp_ipcp_opt_name(u_char opt) |
| 5500 | { |
| 5501 | static char buf[12]; |
| 5502 | switch (opt) { |
| 5503 | case IPCP_OPT_ADDRESSES: return "addresses" ; |
| 5504 | case IPCP_OPT_COMPRESSION: return "compression" ; |
| 5505 | case IPCP_OPT_ADDRESS: return "address" ; |
| 5506 | } |
| 5507 | snprintf(buf, sizeof(buf), "0x%x" , opt); |
| 5508 | return buf; |
| 5509 | } |
| 5510 | |
| 5511 | #ifdef INET6 |
| 5512 | static const char * |
| 5513 | sppp_ipv6cp_opt_name(u_char opt) |
| 5514 | { |
| 5515 | static char buf[12]; |
| 5516 | switch (opt) { |
| 5517 | case IPV6CP_OPT_IFID: return "ifid" ; |
| 5518 | case IPV6CP_OPT_COMPRESSION: return "compression" ; |
| 5519 | } |
| 5520 | snprintf(buf, sizeof(buf), "0x%x" , opt); |
| 5521 | return buf; |
| 5522 | } |
| 5523 | #endif |
| 5524 | |
| 5525 | static const char * |
| 5526 | sppp_state_name(int state) |
| 5527 | { |
| 5528 | switch (state) { |
| 5529 | case STATE_INITIAL: return "initial" ; |
| 5530 | case STATE_STARTING: return "starting" ; |
| 5531 | case STATE_CLOSED: return "closed" ; |
| 5532 | case STATE_STOPPED: return "stopped" ; |
| 5533 | case STATE_CLOSING: return "closing" ; |
| 5534 | case STATE_STOPPING: return "stopping" ; |
| 5535 | case STATE_REQ_SENT: return "req-sent" ; |
| 5536 | case STATE_ACK_RCVD: return "ack-rcvd" ; |
| 5537 | case STATE_ACK_SENT: return "ack-sent" ; |
| 5538 | case STATE_OPENED: return "opened" ; |
| 5539 | } |
| 5540 | return "illegal" ; |
| 5541 | } |
| 5542 | |
| 5543 | static const char * |
| 5544 | sppp_phase_name(int phase) |
| 5545 | { |
| 5546 | switch (phase) { |
| 5547 | case SPPP_PHASE_DEAD: return "dead" ; |
| 5548 | case SPPP_PHASE_ESTABLISH: return "establish" ; |
| 5549 | case SPPP_PHASE_TERMINATE: return "terminate" ; |
| 5550 | case SPPP_PHASE_AUTHENTICATE: return "authenticate" ; |
| 5551 | case SPPP_PHASE_NETWORK: return "network" ; |
| 5552 | } |
| 5553 | return "illegal" ; |
| 5554 | } |
| 5555 | |
| 5556 | static const char * |
| 5557 | sppp_proto_name(u_short proto) |
| 5558 | { |
| 5559 | static char buf[12]; |
| 5560 | switch (proto) { |
| 5561 | case PPP_LCP: return "lcp" ; |
| 5562 | case PPP_IPCP: return "ipcp" ; |
| 5563 | case PPP_PAP: return "pap" ; |
| 5564 | case PPP_CHAP: return "chap" ; |
| 5565 | case PPP_IPV6CP: return "ipv6cp" ; |
| 5566 | } |
| 5567 | snprintf(buf, sizeof(buf), "0x%x" , (unsigned)proto); |
| 5568 | return buf; |
| 5569 | } |
| 5570 | |
| 5571 | static void |
| 5572 | sppp_print_bytes(const u_char *p, u_short len) |
| 5573 | { |
| 5574 | addlog(" %02x" , *p++); |
| 5575 | while (--len > 0) |
| 5576 | addlog("-%02x" , *p++); |
| 5577 | } |
| 5578 | |
| 5579 | static void |
| 5580 | sppp_print_string(const char *p, u_short len) |
| 5581 | { |
| 5582 | u_char c; |
| 5583 | |
| 5584 | while (len-- > 0) { |
| 5585 | c = *p++; |
| 5586 | /* |
| 5587 | * Print only ASCII chars directly. RFC 1994 recommends |
| 5588 | * using only them, but we don't rely on it. */ |
| 5589 | if (c < ' ' || c > '~') |
| 5590 | addlog("\\x%x" , c); |
| 5591 | else |
| 5592 | addlog("%c" , c); |
| 5593 | } |
| 5594 | } |
| 5595 | |
| 5596 | static const char * |
| 5597 | sppp_dotted_quad(uint32_t addr) |
| 5598 | { |
| 5599 | static char s[16]; |
| 5600 | snprintf(s, sizeof(s), "%d.%d.%d.%d" , |
| 5601 | (int)((addr >> 24) & 0xff), |
| 5602 | (int)((addr >> 16) & 0xff), |
| 5603 | (int)((addr >> 8) & 0xff), |
| 5604 | (int)(addr & 0xff)); |
| 5605 | return s; |
| 5606 | } |
| 5607 | |
| 5608 | /* a dummy, used to drop uninteresting events */ |
| 5609 | static void |
| 5610 | sppp_null(struct sppp *unused) |
| 5611 | { |
| 5612 | /* do just nothing */ |
| 5613 | } |
| 5614 | /* |
| 5615 | * This file is large. Tell emacs to highlight it nevertheless. |
| 5616 | * |
| 5617 | * Local Variables: |
| 5618 | * hilit-auto-highlight-maxout: 120000 |
| 5619 | * End: |
| 5620 | */ |
| 5621 | |
| 5622 | /* |
| 5623 | * Module glue |
| 5624 | */ |
| 5625 | MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); |
| 5626 | |
| 5627 | static int |
| 5628 | sppp_subr_modcmd(modcmd_t cmd, void *arg) |
| 5629 | { |
| 5630 | switch (cmd) { |
| 5631 | case MODULE_CMD_INIT: |
| 5632 | case MODULE_CMD_FINI: |
| 5633 | return 0; |
| 5634 | case MODULE_CMD_STAT: |
| 5635 | case MODULE_CMD_AUTOUNLOAD: |
| 5636 | default: |
| 5637 | return ENOTTY; |
| 5638 | } |
| 5639 | } |
| 5640 | |
| 5641 | |