| 1 | /* $NetBSD: in_pcb.c,v 1.170 2016/09/29 12:19:47 roy Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the project nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /*- |
| 33 | * Copyright (c) 1998, 2011 The NetBSD Foundation, Inc. |
| 34 | * All rights reserved. |
| 35 | * |
| 36 | * This code is derived from software contributed to The NetBSD Foundation |
| 37 | * by Coyote Point Systems, Inc. |
| 38 | * This code is derived from software contributed to The NetBSD Foundation |
| 39 | * by Public Access Networks Corporation ("Panix"). It was developed under |
| 40 | * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. |
| 41 | * |
| 42 | * Redistribution and use in source and binary forms, with or without |
| 43 | * modification, are permitted provided that the following conditions |
| 44 | * are met: |
| 45 | * 1. Redistributions of source code must retain the above copyright |
| 46 | * notice, this list of conditions and the following disclaimer. |
| 47 | * 2. Redistributions in binary form must reproduce the above copyright |
| 48 | * notice, this list of conditions and the following disclaimer in the |
| 49 | * documentation and/or other materials provided with the distribution. |
| 50 | * |
| 51 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 52 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 53 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 54 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 55 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 56 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 57 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 58 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 59 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 60 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 61 | * POSSIBILITY OF SUCH DAMAGE. |
| 62 | */ |
| 63 | |
| 64 | /* |
| 65 | * Copyright (c) 1982, 1986, 1991, 1993, 1995 |
| 66 | * The Regents of the University of California. All rights reserved. |
| 67 | * |
| 68 | * Redistribution and use in source and binary forms, with or without |
| 69 | * modification, are permitted provided that the following conditions |
| 70 | * are met: |
| 71 | * 1. Redistributions of source code must retain the above copyright |
| 72 | * notice, this list of conditions and the following disclaimer. |
| 73 | * 2. Redistributions in binary form must reproduce the above copyright |
| 74 | * notice, this list of conditions and the following disclaimer in the |
| 75 | * documentation and/or other materials provided with the distribution. |
| 76 | * 3. Neither the name of the University nor the names of its contributors |
| 77 | * may be used to endorse or promote products derived from this software |
| 78 | * without specific prior written permission. |
| 79 | * |
| 80 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 81 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 82 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 83 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 84 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 85 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 86 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 87 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 88 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 89 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 90 | * SUCH DAMAGE. |
| 91 | * |
| 92 | * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 |
| 93 | */ |
| 94 | |
| 95 | #include <sys/cdefs.h> |
| 96 | __KERNEL_RCSID(0, "$NetBSD: in_pcb.c,v 1.170 2016/09/29 12:19:47 roy Exp $" ); |
| 97 | |
| 98 | #ifdef _KERNEL_OPT |
| 99 | #include "opt_inet.h" |
| 100 | #include "opt_ipsec.h" |
| 101 | #endif |
| 102 | |
| 103 | #include <sys/param.h> |
| 104 | #include <sys/systm.h> |
| 105 | #include <sys/mbuf.h> |
| 106 | #include <sys/protosw.h> |
| 107 | #include <sys/socket.h> |
| 108 | #include <sys/socketvar.h> |
| 109 | #include <sys/ioctl.h> |
| 110 | #include <sys/errno.h> |
| 111 | #include <sys/time.h> |
| 112 | #include <sys/once.h> |
| 113 | #include <sys/pool.h> |
| 114 | #include <sys/proc.h> |
| 115 | #include <sys/kauth.h> |
| 116 | #include <sys/uidinfo.h> |
| 117 | #include <sys/domain.h> |
| 118 | |
| 119 | #include <net/if.h> |
| 120 | #include <net/route.h> |
| 121 | |
| 122 | #include <netinet/in.h> |
| 123 | #include <netinet/in_systm.h> |
| 124 | #include <netinet/ip.h> |
| 125 | #include <netinet/in_pcb.h> |
| 126 | #include <netinet/in_var.h> |
| 127 | #include <netinet/ip_var.h> |
| 128 | #include <netinet/portalgo.h> |
| 129 | |
| 130 | #ifdef INET6 |
| 131 | #include <netinet/ip6.h> |
| 132 | #include <netinet6/ip6_var.h> |
| 133 | #include <netinet6/in6_pcb.h> |
| 134 | #endif |
| 135 | |
| 136 | #ifdef IPSEC |
| 137 | #include <netipsec/ipsec.h> |
| 138 | #include <netipsec/key.h> |
| 139 | #endif /* IPSEC */ |
| 140 | |
| 141 | #include <netinet/tcp_vtw.h> |
| 142 | |
| 143 | struct in_addr zeroin_addr; |
| 144 | |
| 145 | #define INPCBHASH_PORT(table, lport) \ |
| 146 | &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] |
| 147 | #define INPCBHASH_BIND(table, laddr, lport) \ |
| 148 | &(table)->inpt_bindhashtbl[ \ |
| 149 | ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] |
| 150 | #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ |
| 151 | &(table)->inpt_connecthashtbl[ \ |
| 152 | ((ntohl((faddr).s_addr) + ntohs(fport)) + \ |
| 153 | (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] |
| 154 | |
| 155 | int anonportmin = IPPORT_ANONMIN; |
| 156 | int anonportmax = IPPORT_ANONMAX; |
| 157 | int lowportmin = IPPORT_RESERVEDMIN; |
| 158 | int lowportmax = IPPORT_RESERVEDMAX; |
| 159 | |
| 160 | static struct pool inpcb_pool; |
| 161 | |
| 162 | static int |
| 163 | inpcb_poolinit(void) |
| 164 | { |
| 165 | |
| 166 | pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, "inpcbpl" , NULL, |
| 167 | IPL_NET); |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | in_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) |
| 173 | { |
| 174 | static ONCE_DECL(control); |
| 175 | |
| 176 | TAILQ_INIT(&table->inpt_queue); |
| 177 | table->inpt_porthashtbl = hashinit(bindhashsize, HASH_LIST, true, |
| 178 | &table->inpt_porthash); |
| 179 | table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, true, |
| 180 | &table->inpt_bindhash); |
| 181 | table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, true, |
| 182 | &table->inpt_connecthash); |
| 183 | table->inpt_lastlow = IPPORT_RESERVEDMAX; |
| 184 | table->inpt_lastport = (u_int16_t)anonportmax; |
| 185 | |
| 186 | RUN_ONCE(&control, inpcb_poolinit); |
| 187 | } |
| 188 | |
| 189 | int |
| 190 | in_pcballoc(struct socket *so, void *v) |
| 191 | { |
| 192 | struct inpcbtable *table = v; |
| 193 | struct inpcb *inp; |
| 194 | int s; |
| 195 | |
| 196 | s = splnet(); |
| 197 | inp = pool_get(&inpcb_pool, PR_NOWAIT); |
| 198 | splx(s); |
| 199 | if (inp == NULL) |
| 200 | return (ENOBUFS); |
| 201 | memset(inp, 0, sizeof(*inp)); |
| 202 | inp->inp_af = AF_INET; |
| 203 | inp->inp_table = table; |
| 204 | inp->inp_socket = so; |
| 205 | inp->inp_errormtu = -1; |
| 206 | inp->inp_portalgo = PORTALGO_DEFAULT; |
| 207 | inp->inp_bindportonsend = false; |
| 208 | #if defined(IPSEC) |
| 209 | if (ipsec_enabled) { |
| 210 | int error = ipsec_init_pcbpolicy(so, &inp->inp_sp); |
| 211 | if (error != 0) { |
| 212 | s = splnet(); |
| 213 | pool_put(&inpcb_pool, inp); |
| 214 | splx(s); |
| 215 | return error; |
| 216 | } |
| 217 | } |
| 218 | #endif |
| 219 | so->so_pcb = inp; |
| 220 | s = splnet(); |
| 221 | TAILQ_INSERT_HEAD(&table->inpt_queue, &inp->inp_head, inph_queue); |
| 222 | LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, |
| 223 | inph_lhash); |
| 224 | in_pcbstate(inp, INP_ATTACHED); |
| 225 | splx(s); |
| 226 | return (0); |
| 227 | } |
| 228 | |
| 229 | static int |
| 230 | in_pcbsetport(struct sockaddr_in *sin, struct inpcb *inp, kauth_cred_t cred) |
| 231 | { |
| 232 | struct inpcbtable *table = inp->inp_table; |
| 233 | struct socket *so = inp->inp_socket; |
| 234 | u_int16_t *lastport; |
| 235 | u_int16_t lport = 0; |
| 236 | enum kauth_network_req req; |
| 237 | int error; |
| 238 | |
| 239 | if (inp->inp_flags & INP_LOWPORT) { |
| 240 | #ifndef IPNOPRIVPORTS |
| 241 | req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; |
| 242 | #else |
| 243 | req = KAUTH_REQ_NETWORK_BIND_PORT; |
| 244 | #endif |
| 245 | |
| 246 | lastport = &table->inpt_lastlow; |
| 247 | } else { |
| 248 | req = KAUTH_REQ_NETWORK_BIND_PORT; |
| 249 | |
| 250 | lastport = &table->inpt_lastport; |
| 251 | } |
| 252 | |
| 253 | /* XXX-kauth: KAUTH_REQ_NETWORK_BIND_AUTOASSIGN_{,PRIV}PORT */ |
| 254 | error = kauth_authorize_network(cred, KAUTH_NETWORK_BIND, req, so, sin, |
| 255 | NULL); |
| 256 | if (error) |
| 257 | return (EACCES); |
| 258 | |
| 259 | /* |
| 260 | * Use RFC6056 randomized port selection |
| 261 | */ |
| 262 | error = portalgo_randport(&lport, &inp->inp_head, cred); |
| 263 | if (error) |
| 264 | return error; |
| 265 | |
| 266 | inp->inp_flags |= INP_ANONPORT; |
| 267 | *lastport = lport; |
| 268 | lport = htons(lport); |
| 269 | inp->inp_lport = lport; |
| 270 | in_pcbstate(inp, INP_BOUND); |
| 271 | |
| 272 | return (0); |
| 273 | } |
| 274 | |
| 275 | static int |
| 276 | in_pcbbind_addr(struct inpcb *inp, struct sockaddr_in *sin, kauth_cred_t cred) |
| 277 | { |
| 278 | int error = EADDRNOTAVAIL; |
| 279 | struct ifaddr *ifa = NULL; |
| 280 | int s; |
| 281 | |
| 282 | if (sin->sin_family != AF_INET) |
| 283 | return (EAFNOSUPPORT); |
| 284 | |
| 285 | s = pserialize_read_enter(); |
| 286 | if (IN_MULTICAST(sin->sin_addr.s_addr)) { |
| 287 | /* Always succeed; port reuse handled in in_pcbbind_port(). */ |
| 288 | } else if (!in_nullhost(sin->sin_addr)) { |
| 289 | struct in_ifaddr *ia; |
| 290 | |
| 291 | ia = in_get_ia(sin->sin_addr); |
| 292 | /* check for broadcast addresses */ |
| 293 | if (ia == NULL) { |
| 294 | ifa = ifa_ifwithaddr(sintosa(sin)); |
| 295 | if (ifa != NULL) |
| 296 | ia = ifatoia(ifa); |
| 297 | } |
| 298 | if (ia == NULL) |
| 299 | goto error; |
| 300 | if (ia->ia4_flags & IN_IFF_DUPLICATED) |
| 301 | goto error; |
| 302 | } |
| 303 | pserialize_read_exit(s); |
| 304 | |
| 305 | inp->inp_laddr = sin->sin_addr; |
| 306 | |
| 307 | return (0); |
| 308 | error: |
| 309 | pserialize_read_exit(s); |
| 310 | return error; |
| 311 | } |
| 312 | |
| 313 | static int |
| 314 | in_pcbbind_port(struct inpcb *inp, struct sockaddr_in *sin, kauth_cred_t cred) |
| 315 | { |
| 316 | struct inpcbtable *table = inp->inp_table; |
| 317 | struct socket *so = inp->inp_socket; |
| 318 | int reuseport = (so->so_options & SO_REUSEPORT); |
| 319 | int wild = 0, error; |
| 320 | |
| 321 | if (IN_MULTICAST(sin->sin_addr.s_addr)) { |
| 322 | /* |
| 323 | * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; |
| 324 | * allow complete duplication of binding if |
| 325 | * SO_REUSEPORT is set, or if SO_REUSEADDR is set |
| 326 | * and a multicast address is bound on both |
| 327 | * new and duplicated sockets. |
| 328 | */ |
| 329 | if (so->so_options & (SO_REUSEADDR | SO_REUSEPORT)) |
| 330 | reuseport = SO_REUSEADDR|SO_REUSEPORT; |
| 331 | } |
| 332 | |
| 333 | if (sin->sin_port == 0) { |
| 334 | error = in_pcbsetport(sin, inp, cred); |
| 335 | if (error) |
| 336 | return (error); |
| 337 | } else { |
| 338 | struct inpcb *t; |
| 339 | vestigial_inpcb_t vestige; |
| 340 | #ifdef INET6 |
| 341 | struct in6pcb *t6; |
| 342 | struct in6_addr mapped; |
| 343 | #endif |
| 344 | enum kauth_network_req req; |
| 345 | |
| 346 | if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) |
| 347 | wild = 1; |
| 348 | |
| 349 | #ifndef IPNOPRIVPORTS |
| 350 | if (ntohs(sin->sin_port) < IPPORT_RESERVED) |
| 351 | req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; |
| 352 | else |
| 353 | #endif /* !IPNOPRIVPORTS */ |
| 354 | req = KAUTH_REQ_NETWORK_BIND_PORT; |
| 355 | |
| 356 | error = kauth_authorize_network(cred, KAUTH_NETWORK_BIND, req, |
| 357 | so, sin, NULL); |
| 358 | if (error) |
| 359 | return (EACCES); |
| 360 | |
| 361 | #ifdef INET6 |
| 362 | in6_in_2_v4mapin6(&sin->sin_addr, &mapped); |
| 363 | t6 = in6_pcblookup_port(table, &mapped, sin->sin_port, wild, &vestige); |
| 364 | if (t6 && (reuseport & t6->in6p_socket->so_options) == 0) |
| 365 | return (EADDRINUSE); |
| 366 | if (!t6 && vestige.valid) { |
| 367 | if (!!reuseport != !!vestige.reuse_port) { |
| 368 | return EADDRINUSE; |
| 369 | } |
| 370 | } |
| 371 | #endif |
| 372 | |
| 373 | /* XXX-kauth */ |
| 374 | if (so->so_uidinfo->ui_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { |
| 375 | t = in_pcblookup_port(table, sin->sin_addr, sin->sin_port, 1, &vestige); |
| 376 | /* |
| 377 | * XXX: investigate ramifications of loosening this |
| 378 | * restriction so that as long as both ports have |
| 379 | * SO_REUSEPORT allow the bind |
| 380 | */ |
| 381 | if (t && |
| 382 | (!in_nullhost(sin->sin_addr) || |
| 383 | !in_nullhost(t->inp_laddr) || |
| 384 | (t->inp_socket->so_options & SO_REUSEPORT) == 0) |
| 385 | && (so->so_uidinfo->ui_uid != t->inp_socket->so_uidinfo->ui_uid)) { |
| 386 | return (EADDRINUSE); |
| 387 | } |
| 388 | if (!t && vestige.valid) { |
| 389 | if ((!in_nullhost(sin->sin_addr) |
| 390 | || !in_nullhost(vestige.laddr.v4) |
| 391 | || !vestige.reuse_port) |
| 392 | && so->so_uidinfo->ui_uid != vestige.uid) { |
| 393 | return EADDRINUSE; |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | t = in_pcblookup_port(table, sin->sin_addr, sin->sin_port, wild, &vestige); |
| 398 | if (t && (reuseport & t->inp_socket->so_options) == 0) |
| 399 | return (EADDRINUSE); |
| 400 | if (!t |
| 401 | && vestige.valid |
| 402 | && !(reuseport && vestige.reuse_port)) |
| 403 | return EADDRINUSE; |
| 404 | |
| 405 | inp->inp_lport = sin->sin_port; |
| 406 | in_pcbstate(inp, INP_BOUND); |
| 407 | } |
| 408 | |
| 409 | LIST_REMOVE(&inp->inp_head, inph_lhash); |
| 410 | LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, |
| 411 | inph_lhash); |
| 412 | |
| 413 | return (0); |
| 414 | } |
| 415 | |
| 416 | int |
| 417 | in_pcbbind(void *v, struct sockaddr_in *sin, struct lwp *l) |
| 418 | { |
| 419 | struct inpcb *inp = v; |
| 420 | struct sockaddr_in lsin; |
| 421 | int error; |
| 422 | |
| 423 | if (inp->inp_af != AF_INET) |
| 424 | return (EINVAL); |
| 425 | |
| 426 | if (IN_ADDRLIST_READER_EMPTY()) |
| 427 | return (EADDRNOTAVAIL); |
| 428 | if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) |
| 429 | return (EINVAL); |
| 430 | |
| 431 | if (NULL != sin) { |
| 432 | if (sin->sin_len != sizeof(*sin)) |
| 433 | return (EINVAL); |
| 434 | } else { |
| 435 | lsin = *((const struct sockaddr_in *) |
| 436 | inp->inp_socket->so_proto->pr_domain->dom_sa_any); |
| 437 | sin = &lsin; |
| 438 | } |
| 439 | |
| 440 | /* Bind address. */ |
| 441 | error = in_pcbbind_addr(inp, sin, l->l_cred); |
| 442 | if (error) |
| 443 | return (error); |
| 444 | |
| 445 | /* Bind port. */ |
| 446 | error = in_pcbbind_port(inp, sin, l->l_cred); |
| 447 | if (error) { |
| 448 | inp->inp_laddr.s_addr = INADDR_ANY; |
| 449 | |
| 450 | return (error); |
| 451 | } |
| 452 | |
| 453 | return (0); |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Connect from a socket to a specified address. |
| 458 | * Both address and port must be specified in argument sin. |
| 459 | * If don't have a local address for this socket yet, |
| 460 | * then pick one. |
| 461 | */ |
| 462 | int |
| 463 | in_pcbconnect(void *v, struct sockaddr_in *sin, struct lwp *l) |
| 464 | { |
| 465 | struct inpcb *inp = v; |
| 466 | vestigial_inpcb_t vestige; |
| 467 | int error; |
| 468 | struct in_addr laddr; |
| 469 | |
| 470 | if (inp->inp_af != AF_INET) |
| 471 | return (EINVAL); |
| 472 | |
| 473 | if (sin->sin_len != sizeof (*sin)) |
| 474 | return (EINVAL); |
| 475 | if (sin->sin_family != AF_INET) |
| 476 | return (EAFNOSUPPORT); |
| 477 | if (sin->sin_port == 0) |
| 478 | return (EADDRNOTAVAIL); |
| 479 | |
| 480 | if (IN_MULTICAST(sin->sin_addr.s_addr) && |
| 481 | inp->inp_socket->so_type == SOCK_STREAM) |
| 482 | return EADDRNOTAVAIL; |
| 483 | |
| 484 | if (!IN_ADDRLIST_READER_EMPTY()) { |
| 485 | /* |
| 486 | * If the destination address is INADDR_ANY, |
| 487 | * use any local address (likely loopback). |
| 488 | * If the supplied address is INADDR_BROADCAST, |
| 489 | * use the broadcast address of an interface |
| 490 | * which supports broadcast. (loopback does not) |
| 491 | */ |
| 492 | |
| 493 | if (in_nullhost(sin->sin_addr)) { |
| 494 | /* XXX racy */ |
| 495 | sin->sin_addr = |
| 496 | IN_ADDRLIST_READER_FIRST()->ia_addr.sin_addr; |
| 497 | } else if (sin->sin_addr.s_addr == INADDR_BROADCAST) { |
| 498 | struct in_ifaddr *ia; |
| 499 | int s = pserialize_read_enter(); |
| 500 | IN_ADDRLIST_READER_FOREACH(ia) { |
| 501 | if (ia->ia_ifp->if_flags & IFF_BROADCAST) { |
| 502 | sin->sin_addr = |
| 503 | ia->ia_broadaddr.sin_addr; |
| 504 | break; |
| 505 | } |
| 506 | } |
| 507 | pserialize_read_exit(s); |
| 508 | } |
| 509 | } |
| 510 | /* |
| 511 | * If we haven't bound which network number to use as ours, |
| 512 | * we will use the number of the outgoing interface. |
| 513 | * This depends on having done a routing lookup, which |
| 514 | * we will probably have to do anyway, so we might |
| 515 | * as well do it now. On the other hand if we are |
| 516 | * sending to multiple destinations we may have already |
| 517 | * done the lookup, so see if we can use the route |
| 518 | * from before. In any case, we only |
| 519 | * chose a port number once, even if sending to multiple |
| 520 | * destinations. |
| 521 | */ |
| 522 | if (in_nullhost(inp->inp_laddr)) { |
| 523 | int xerror; |
| 524 | struct in_ifaddr *ia, *_ia; |
| 525 | int s; |
| 526 | struct psref psref; |
| 527 | int bound; |
| 528 | |
| 529 | bound = curlwp_bind(); |
| 530 | ia = in_selectsrc(sin, &inp->inp_route, |
| 531 | inp->inp_socket->so_options, inp->inp_moptions, &xerror, |
| 532 | &psref); |
| 533 | if (ia == NULL) { |
| 534 | curlwp_bindx(bound); |
| 535 | if (xerror == 0) |
| 536 | xerror = EADDRNOTAVAIL; |
| 537 | return xerror; |
| 538 | } |
| 539 | s = pserialize_read_enter(); |
| 540 | _ia = in_get_ia(IA_SIN(ia)->sin_addr); |
| 541 | if (_ia == NULL) { |
| 542 | pserialize_read_exit(s); |
| 543 | ia4_release(ia, &psref); |
| 544 | curlwp_bindx(bound); |
| 545 | return (EADDRNOTAVAIL); |
| 546 | } |
| 547 | pserialize_read_exit(s); |
| 548 | laddr = IA_SIN(ia)->sin_addr; |
| 549 | ia4_release(ia, &psref); |
| 550 | curlwp_bindx(bound); |
| 551 | } else |
| 552 | laddr = inp->inp_laddr; |
| 553 | if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, |
| 554 | laddr, inp->inp_lport, &vestige) != NULL || |
| 555 | vestige.valid) { |
| 556 | return (EADDRINUSE); |
| 557 | } |
| 558 | if (in_nullhost(inp->inp_laddr)) { |
| 559 | if (inp->inp_lport == 0) { |
| 560 | error = in_pcbbind(inp, NULL, l); |
| 561 | /* |
| 562 | * This used to ignore the return value |
| 563 | * completely, but we need to check for |
| 564 | * ephemeral port shortage. |
| 565 | * And attempts to request low ports if not root. |
| 566 | */ |
| 567 | if (error != 0) |
| 568 | return (error); |
| 569 | } |
| 570 | inp->inp_laddr = laddr; |
| 571 | } |
| 572 | inp->inp_faddr = sin->sin_addr; |
| 573 | inp->inp_fport = sin->sin_port; |
| 574 | |
| 575 | /* Late bind, if needed */ |
| 576 | if (inp->inp_bindportonsend) { |
| 577 | struct sockaddr_in lsin = *((const struct sockaddr_in *) |
| 578 | inp->inp_socket->so_proto->pr_domain->dom_sa_any); |
| 579 | lsin.sin_addr = inp->inp_laddr; |
| 580 | lsin.sin_port = 0; |
| 581 | |
| 582 | if ((error = in_pcbbind_port(inp, &lsin, l->l_cred)) != 0) |
| 583 | return error; |
| 584 | } |
| 585 | |
| 586 | in_pcbstate(inp, INP_CONNECTED); |
| 587 | #if defined(IPSEC) |
| 588 | if (ipsec_enabled && inp->inp_socket->so_type == SOCK_STREAM) |
| 589 | ipsec_pcbconn(inp->inp_sp); |
| 590 | #endif |
| 591 | return (0); |
| 592 | } |
| 593 | |
| 594 | void |
| 595 | in_pcbdisconnect(void *v) |
| 596 | { |
| 597 | struct inpcb *inp = v; |
| 598 | |
| 599 | if (inp->inp_af != AF_INET) |
| 600 | return; |
| 601 | |
| 602 | inp->inp_faddr = zeroin_addr; |
| 603 | inp->inp_fport = 0; |
| 604 | in_pcbstate(inp, INP_BOUND); |
| 605 | #if defined(IPSEC) |
| 606 | if (ipsec_enabled) |
| 607 | ipsec_pcbdisconn(inp->inp_sp); |
| 608 | #endif |
| 609 | if (inp->inp_socket->so_state & SS_NOFDREF) |
| 610 | in_pcbdetach(inp); |
| 611 | } |
| 612 | |
| 613 | void |
| 614 | in_pcbdetach(void *v) |
| 615 | { |
| 616 | struct inpcb *inp = v; |
| 617 | struct socket *so = inp->inp_socket; |
| 618 | int s; |
| 619 | |
| 620 | if (inp->inp_af != AF_INET) |
| 621 | return; |
| 622 | |
| 623 | #if defined(IPSEC) |
| 624 | if (ipsec_enabled) |
| 625 | ipsec4_delete_pcbpolicy(inp); |
| 626 | #endif |
| 627 | so->so_pcb = NULL; |
| 628 | |
| 629 | s = splnet(); |
| 630 | in_pcbstate(inp, INP_ATTACHED); |
| 631 | LIST_REMOVE(&inp->inp_head, inph_lhash); |
| 632 | TAILQ_REMOVE(&inp->inp_table->inpt_queue, &inp->inp_head, inph_queue); |
| 633 | splx(s); |
| 634 | |
| 635 | if (inp->inp_options) { |
| 636 | m_free(inp->inp_options); |
| 637 | } |
| 638 | rtcache_free(&inp->inp_route); |
| 639 | ip_freemoptions(inp->inp_moptions); |
| 640 | sofree(so); /* drops the socket's lock */ |
| 641 | |
| 642 | pool_put(&inpcb_pool, inp); |
| 643 | mutex_enter(softnet_lock); /* reacquire the softnet_lock */ |
| 644 | } |
| 645 | |
| 646 | void |
| 647 | in_setsockaddr(struct inpcb *inp, struct sockaddr_in *sin) |
| 648 | { |
| 649 | |
| 650 | if (inp->inp_af != AF_INET) |
| 651 | return; |
| 652 | |
| 653 | sockaddr_in_init(sin, &inp->inp_laddr, inp->inp_lport); |
| 654 | } |
| 655 | |
| 656 | void |
| 657 | in_setpeeraddr(struct inpcb *inp, struct sockaddr_in *sin) |
| 658 | { |
| 659 | |
| 660 | if (inp->inp_af != AF_INET) |
| 661 | return; |
| 662 | |
| 663 | sockaddr_in_init(sin, &inp->inp_faddr, inp->inp_fport); |
| 664 | } |
| 665 | |
| 666 | /* |
| 667 | * Pass some notification to all connections of a protocol |
| 668 | * associated with address dst. The local address and/or port numbers |
| 669 | * may be specified to limit the search. The "usual action" will be |
| 670 | * taken, depending on the ctlinput cmd. The caller must filter any |
| 671 | * cmds that are uninteresting (e.g., no error in the map). |
| 672 | * Call the protocol specific routine (if any) to report |
| 673 | * any errors for each matching socket. |
| 674 | * |
| 675 | * Must be called at splsoftnet. |
| 676 | */ |
| 677 | int |
| 678 | in_pcbnotify(struct inpcbtable *table, struct in_addr faddr, u_int fport_arg, |
| 679 | struct in_addr laddr, u_int lport_arg, int errno, |
| 680 | void (*notify)(struct inpcb *, int)) |
| 681 | { |
| 682 | struct inpcbhead *head; |
| 683 | struct inpcb *inp, *ninp; |
| 684 | u_int16_t fport = fport_arg, lport = lport_arg; |
| 685 | int nmatch; |
| 686 | |
| 687 | if (in_nullhost(faddr) || notify == 0) |
| 688 | return (0); |
| 689 | |
| 690 | nmatch = 0; |
| 691 | head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); |
| 692 | for (inp = (struct inpcb *)LIST_FIRST(head); inp != NULL; inp = ninp) { |
| 693 | ninp = (struct inpcb *)LIST_NEXT(inp, inp_hash); |
| 694 | if (inp->inp_af != AF_INET) |
| 695 | continue; |
| 696 | if (in_hosteq(inp->inp_faddr, faddr) && |
| 697 | inp->inp_fport == fport && |
| 698 | inp->inp_lport == lport && |
| 699 | in_hosteq(inp->inp_laddr, laddr)) { |
| 700 | (*notify)(inp, errno); |
| 701 | nmatch++; |
| 702 | } |
| 703 | } |
| 704 | return (nmatch); |
| 705 | } |
| 706 | |
| 707 | void |
| 708 | in_pcbnotifyall(struct inpcbtable *table, struct in_addr faddr, int errno, |
| 709 | void (*notify)(struct inpcb *, int)) |
| 710 | { |
| 711 | struct inpcb_hdr *inph, *ninph; |
| 712 | |
| 713 | if (in_nullhost(faddr) || notify == 0) |
| 714 | return; |
| 715 | |
| 716 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
| 717 | struct inpcb *inp = (struct inpcb *)inph; |
| 718 | if (inp->inp_af != AF_INET) |
| 719 | continue; |
| 720 | if (in_hosteq(inp->inp_faddr, faddr)) |
| 721 | (*notify)(inp, errno); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | void |
| 726 | in_purgeifmcast(struct ip_moptions *imo, struct ifnet *ifp) |
| 727 | { |
| 728 | int i, gap; |
| 729 | |
| 730 | KASSERT(ifp != NULL); |
| 731 | |
| 732 | if (imo == NULL) |
| 733 | return; |
| 734 | |
| 735 | /* |
| 736 | * Unselect the outgoing interface if it is being |
| 737 | * detached. |
| 738 | */ |
| 739 | if (imo->imo_multicast_if_index == ifp->if_index) |
| 740 | imo->imo_multicast_if_index = 0; |
| 741 | |
| 742 | /* |
| 743 | * Drop multicast group membership if we joined |
| 744 | * through the interface being detached. |
| 745 | */ |
| 746 | for (i = 0, gap = 0; i < imo->imo_num_memberships; i++) { |
| 747 | if (imo->imo_membership[i]->inm_ifp == ifp) { |
| 748 | in_delmulti(imo->imo_membership[i]); |
| 749 | gap++; |
| 750 | } else if (gap != 0) |
| 751 | imo->imo_membership[i - gap] = imo->imo_membership[i]; |
| 752 | } |
| 753 | imo->imo_num_memberships -= gap; |
| 754 | } |
| 755 | |
| 756 | void |
| 757 | in_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) |
| 758 | { |
| 759 | struct inpcb_hdr *inph, *ninph; |
| 760 | |
| 761 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
| 762 | struct inpcb *inp = (struct inpcb *)inph; |
| 763 | if (inp->inp_af != AF_INET) |
| 764 | continue; |
| 765 | in_purgeifmcast(inp->inp_moptions, ifp); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | void |
| 770 | in_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) |
| 771 | { |
| 772 | struct rtentry *rt; |
| 773 | struct inpcb_hdr *inph, *ninph; |
| 774 | |
| 775 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
| 776 | struct inpcb *inp = (struct inpcb *)inph; |
| 777 | if (inp->inp_af != AF_INET) |
| 778 | continue; |
| 779 | if ((rt = rtcache_validate(&inp->inp_route)) != NULL && |
| 780 | rt->rt_ifp == ifp) |
| 781 | in_rtchange(inp, 0); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | /* |
| 786 | * Check for alternatives when higher level complains |
| 787 | * about service problems. For now, invalidate cached |
| 788 | * routing information. If the route was created dynamically |
| 789 | * (by a redirect), time to try a default gateway again. |
| 790 | */ |
| 791 | void |
| 792 | in_losing(struct inpcb *inp) |
| 793 | { |
| 794 | struct rtentry *rt; |
| 795 | struct rt_addrinfo info; |
| 796 | |
| 797 | if (inp->inp_af != AF_INET) |
| 798 | return; |
| 799 | |
| 800 | if ((rt = rtcache_validate(&inp->inp_route)) == NULL) |
| 801 | return; |
| 802 | |
| 803 | memset(&info, 0, sizeof(info)); |
| 804 | info.rti_info[RTAX_DST] = rtcache_getdst(&inp->inp_route); |
| 805 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 806 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 807 | rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); |
| 808 | if (rt->rt_flags & RTF_DYNAMIC) |
| 809 | (void) rtrequest(RTM_DELETE, rt_getkey(rt), |
| 810 | rt->rt_gateway, rt_mask(rt), rt->rt_flags, |
| 811 | NULL); |
| 812 | /* |
| 813 | * A new route can be allocated |
| 814 | * the next time output is attempted. |
| 815 | */ |
| 816 | rtcache_free(&inp->inp_route); |
| 817 | } |
| 818 | |
| 819 | /* |
| 820 | * After a routing change, flush old routing. A new route can be |
| 821 | * allocated the next time output is attempted. |
| 822 | */ |
| 823 | void |
| 824 | in_rtchange(struct inpcb *inp, int errno) |
| 825 | { |
| 826 | |
| 827 | if (inp->inp_af != AF_INET) |
| 828 | return; |
| 829 | |
| 830 | rtcache_free(&inp->inp_route); |
| 831 | |
| 832 | /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ |
| 833 | } |
| 834 | |
| 835 | struct inpcb * |
| 836 | in_pcblookup_port(struct inpcbtable *table, struct in_addr laddr, |
| 837 | u_int lport_arg, int lookup_wildcard, vestigial_inpcb_t *vp) |
| 838 | { |
| 839 | struct inpcbhead *head; |
| 840 | struct inpcb_hdr *inph; |
| 841 | struct inpcb *match = NULL; |
| 842 | int matchwild = 3; |
| 843 | int wildcard; |
| 844 | u_int16_t lport = lport_arg; |
| 845 | |
| 846 | if (vp) |
| 847 | vp->valid = 0; |
| 848 | |
| 849 | head = INPCBHASH_PORT(table, lport); |
| 850 | LIST_FOREACH(inph, head, inph_lhash) { |
| 851 | struct inpcb * const inp = (struct inpcb *)inph; |
| 852 | |
| 853 | if (inp->inp_af != AF_INET) |
| 854 | continue; |
| 855 | if (inp->inp_lport != lport) |
| 856 | continue; |
| 857 | /* |
| 858 | * check if inp's faddr and laddr match with ours. |
| 859 | * our faddr is considered null. |
| 860 | * count the number of wildcard matches. (0 - 2) |
| 861 | * |
| 862 | * null null match |
| 863 | * A null wildcard match |
| 864 | * null B wildcard match |
| 865 | * A B non match |
| 866 | * A A match |
| 867 | */ |
| 868 | wildcard = 0; |
| 869 | if (!in_nullhost(inp->inp_faddr)) |
| 870 | wildcard++; |
| 871 | if (in_nullhost(inp->inp_laddr)) { |
| 872 | if (!in_nullhost(laddr)) |
| 873 | wildcard++; |
| 874 | } else { |
| 875 | if (in_nullhost(laddr)) |
| 876 | wildcard++; |
| 877 | else { |
| 878 | if (!in_hosteq(inp->inp_laddr, laddr)) |
| 879 | continue; |
| 880 | } |
| 881 | } |
| 882 | if (wildcard && !lookup_wildcard) |
| 883 | continue; |
| 884 | /* |
| 885 | * prefer an address with less wildcards. |
| 886 | */ |
| 887 | if (wildcard < matchwild) { |
| 888 | match = inp; |
| 889 | matchwild = wildcard; |
| 890 | if (matchwild == 0) |
| 891 | break; |
| 892 | } |
| 893 | } |
| 894 | if (match && matchwild == 0) |
| 895 | return match; |
| 896 | |
| 897 | if (vp && table->vestige) { |
| 898 | void *state = (*table->vestige->init_ports4)(laddr, lport_arg, lookup_wildcard); |
| 899 | vestigial_inpcb_t better; |
| 900 | |
| 901 | while (table->vestige |
| 902 | && (*table->vestige->next_port4)(state, vp)) { |
| 903 | |
| 904 | if (vp->lport != lport) |
| 905 | continue; |
| 906 | wildcard = 0; |
| 907 | if (!in_nullhost(vp->faddr.v4)) |
| 908 | wildcard++; |
| 909 | if (in_nullhost(vp->laddr.v4)) { |
| 910 | if (!in_nullhost(laddr)) |
| 911 | wildcard++; |
| 912 | } else { |
| 913 | if (in_nullhost(laddr)) |
| 914 | wildcard++; |
| 915 | else { |
| 916 | if (!in_hosteq(vp->laddr.v4, laddr)) |
| 917 | continue; |
| 918 | } |
| 919 | } |
| 920 | if (wildcard && !lookup_wildcard) |
| 921 | continue; |
| 922 | if (wildcard < matchwild) { |
| 923 | better = *vp; |
| 924 | match = (void*)&better; |
| 925 | |
| 926 | matchwild = wildcard; |
| 927 | if (matchwild == 0) |
| 928 | break; |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | if (match) { |
| 933 | if (match != (void*)&better) |
| 934 | return match; |
| 935 | else { |
| 936 | *vp = better; |
| 937 | return 0; |
| 938 | } |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | return (match); |
| 943 | } |
| 944 | |
| 945 | #ifdef DIAGNOSTIC |
| 946 | int in_pcbnotifymiss = 0; |
| 947 | #endif |
| 948 | |
| 949 | struct inpcb * |
| 950 | in_pcblookup_connect(struct inpcbtable *table, |
| 951 | struct in_addr faddr, u_int fport_arg, |
| 952 | struct in_addr laddr, u_int lport_arg, |
| 953 | vestigial_inpcb_t *vp) |
| 954 | { |
| 955 | struct inpcbhead *head; |
| 956 | struct inpcb_hdr *inph; |
| 957 | struct inpcb *inp; |
| 958 | u_int16_t fport = fport_arg, lport = lport_arg; |
| 959 | |
| 960 | if (vp) |
| 961 | vp->valid = 0; |
| 962 | |
| 963 | head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); |
| 964 | LIST_FOREACH(inph, head, inph_hash) { |
| 965 | inp = (struct inpcb *)inph; |
| 966 | if (inp->inp_af != AF_INET) |
| 967 | continue; |
| 968 | |
| 969 | if (in_hosteq(inp->inp_faddr, faddr) && |
| 970 | inp->inp_fport == fport && |
| 971 | inp->inp_lport == lport && |
| 972 | in_hosteq(inp->inp_laddr, laddr)) |
| 973 | goto out; |
| 974 | } |
| 975 | if (vp && table->vestige) { |
| 976 | if ((*table->vestige->lookup4)(faddr, fport_arg, |
| 977 | laddr, lport_arg, vp)) |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | #ifdef DIAGNOSTIC |
| 982 | if (in_pcbnotifymiss) { |
| 983 | printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n" , |
| 984 | ntohl(faddr.s_addr), ntohs(fport), |
| 985 | ntohl(laddr.s_addr), ntohs(lport)); |
| 986 | } |
| 987 | #endif |
| 988 | return (0); |
| 989 | |
| 990 | out: |
| 991 | /* Move this PCB to the head of hash chain. */ |
| 992 | inph = &inp->inp_head; |
| 993 | if (inph != LIST_FIRST(head)) { |
| 994 | LIST_REMOVE(inph, inph_hash); |
| 995 | LIST_INSERT_HEAD(head, inph, inph_hash); |
| 996 | } |
| 997 | return (inp); |
| 998 | } |
| 999 | |
| 1000 | struct inpcb * |
| 1001 | in_pcblookup_bind(struct inpcbtable *table, |
| 1002 | struct in_addr laddr, u_int lport_arg) |
| 1003 | { |
| 1004 | struct inpcbhead *head; |
| 1005 | struct inpcb_hdr *inph; |
| 1006 | struct inpcb *inp; |
| 1007 | u_int16_t lport = lport_arg; |
| 1008 | |
| 1009 | head = INPCBHASH_BIND(table, laddr, lport); |
| 1010 | LIST_FOREACH(inph, head, inph_hash) { |
| 1011 | inp = (struct inpcb *)inph; |
| 1012 | if (inp->inp_af != AF_INET) |
| 1013 | continue; |
| 1014 | |
| 1015 | if (inp->inp_lport == lport && |
| 1016 | in_hosteq(inp->inp_laddr, laddr)) |
| 1017 | goto out; |
| 1018 | } |
| 1019 | head = INPCBHASH_BIND(table, zeroin_addr, lport); |
| 1020 | LIST_FOREACH(inph, head, inph_hash) { |
| 1021 | inp = (struct inpcb *)inph; |
| 1022 | if (inp->inp_af != AF_INET) |
| 1023 | continue; |
| 1024 | |
| 1025 | if (inp->inp_lport == lport && |
| 1026 | in_hosteq(inp->inp_laddr, zeroin_addr)) |
| 1027 | goto out; |
| 1028 | } |
| 1029 | #ifdef DIAGNOSTIC |
| 1030 | if (in_pcbnotifymiss) { |
| 1031 | printf("in_pcblookup_bind: laddr=%08x lport=%d\n" , |
| 1032 | ntohl(laddr.s_addr), ntohs(lport)); |
| 1033 | } |
| 1034 | #endif |
| 1035 | return (0); |
| 1036 | |
| 1037 | out: |
| 1038 | /* Move this PCB to the head of hash chain. */ |
| 1039 | inph = &inp->inp_head; |
| 1040 | if (inph != LIST_FIRST(head)) { |
| 1041 | LIST_REMOVE(inph, inph_hash); |
| 1042 | LIST_INSERT_HEAD(head, inph, inph_hash); |
| 1043 | } |
| 1044 | return (inp); |
| 1045 | } |
| 1046 | |
| 1047 | void |
| 1048 | in_pcbstate(struct inpcb *inp, int state) |
| 1049 | { |
| 1050 | |
| 1051 | if (inp->inp_af != AF_INET) |
| 1052 | return; |
| 1053 | |
| 1054 | if (inp->inp_state > INP_ATTACHED) |
| 1055 | LIST_REMOVE(&inp->inp_head, inph_hash); |
| 1056 | |
| 1057 | switch (state) { |
| 1058 | case INP_BOUND: |
| 1059 | LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, |
| 1060 | inp->inp_laddr, inp->inp_lport), &inp->inp_head, |
| 1061 | inph_hash); |
| 1062 | break; |
| 1063 | case INP_CONNECTED: |
| 1064 | LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, |
| 1065 | inp->inp_faddr, inp->inp_fport, |
| 1066 | inp->inp_laddr, inp->inp_lport), &inp->inp_head, |
| 1067 | inph_hash); |
| 1068 | break; |
| 1069 | } |
| 1070 | |
| 1071 | inp->inp_state = state; |
| 1072 | } |
| 1073 | |
| 1074 | struct rtentry * |
| 1075 | in_pcbrtentry(struct inpcb *inp) |
| 1076 | { |
| 1077 | struct route *ro; |
| 1078 | union { |
| 1079 | struct sockaddr dst; |
| 1080 | struct sockaddr_in dst4; |
| 1081 | } u; |
| 1082 | |
| 1083 | if (inp->inp_af != AF_INET) |
| 1084 | return (NULL); |
| 1085 | |
| 1086 | ro = &inp->inp_route; |
| 1087 | |
| 1088 | sockaddr_in_init(&u.dst4, &inp->inp_faddr, 0); |
| 1089 | return rtcache_lookup(ro, &u.dst); |
| 1090 | } |
| 1091 | |