in_pcb.c revision 1.100.2.1
1 /* $NetBSD: in_pcb.c,v 1.100.2.1 2006/06/21 15:11:00 yamt 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 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Public Access Networks Corporation ("Panix"). It was developed under 38 * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by the NetBSD 51 * Foundation, Inc. and its contributors. 52 * 4. Neither the name of The NetBSD Foundation nor the names of its 53 * contributors may be used to endorse or promote products derived 54 * from this software without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 57 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 58 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 59 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 60 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 61 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 62 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 63 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 64 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 65 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 66 * POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * Copyright (c) 1982, 1986, 1991, 1993, 1995 71 * The Regents of the University of California. All rights reserved. 72 * 73 * Redistribution and use in source and binary forms, with or without 74 * modification, are permitted provided that the following conditions 75 * are met: 76 * 1. Redistributions of source code must retain the above copyright 77 * notice, this list of conditions and the following disclaimer. 78 * 2. Redistributions in binary form must reproduce the above copyright 79 * notice, this list of conditions and the following disclaimer in the 80 * documentation and/or other materials provided with the distribution. 81 * 3. Neither the name of the University nor the names of its contributors 82 * may be used to endorse or promote products derived from this software 83 * without specific prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 86 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 87 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 88 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 89 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 90 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 91 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 98 */ 99 100 #include <sys/cdefs.h> 101 __KERNEL_RCSID(0, "$NetBSD: in_pcb.c,v 1.100.2.1 2006/06/21 15:11:00 yamt Exp $"); 102 103 #include "opt_inet.h" 104 #include "opt_ipsec.h" 105 106 #include <sys/param.h> 107 #include <sys/systm.h> 108 #include <sys/malloc.h> 109 #include <sys/mbuf.h> 110 #include <sys/protosw.h> 111 #include <sys/socket.h> 112 #include <sys/socketvar.h> 113 #include <sys/ioctl.h> 114 #include <sys/errno.h> 115 #include <sys/time.h> 116 #include <sys/pool.h> 117 #include <sys/proc.h> 118 #include <sys/kauth.h> 119 120 #include <net/if.h> 121 #include <net/route.h> 122 123 #include <netinet/in.h> 124 #include <netinet/in_systm.h> 125 #include <netinet/ip.h> 126 #include <netinet/in_pcb.h> 127 #include <netinet/in_var.h> 128 #include <netinet/ip_var.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 <netinet6/ipsec.h> 138 #include <netkey/key.h> 139 #elif FAST_IPSEC 140 #include <netipsec/ipsec.h> 141 #include <netipsec/key.h> 142 #endif /* IPSEC */ 143 144 struct in_addr zeroin_addr; 145 146 #define INPCBHASH_PORT(table, lport) \ 147 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 148 #define INPCBHASH_BIND(table, laddr, lport) \ 149 &(table)->inpt_bindhashtbl[ \ 150 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 151 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 152 &(table)->inpt_connecthashtbl[ \ 153 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 154 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 155 156 int anonportmin = IPPORT_ANONMIN; 157 int anonportmax = IPPORT_ANONMAX; 158 int lowportmin = IPPORT_RESERVEDMIN; 159 int lowportmax = IPPORT_RESERVEDMAX; 160 161 POOL_INIT(inpcb_pool, sizeof(struct inpcb), 0, 0, 0, "inpcbpl", NULL); 162 163 void 164 in_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 165 { 166 167 CIRCLEQ_INIT(&table->inpt_queue); 168 table->inpt_porthashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 169 M_WAITOK, &table->inpt_porthash); 170 table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 171 M_WAITOK, &table->inpt_bindhash); 172 table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, 173 M_PCB, M_WAITOK, &table->inpt_connecthash); 174 table->inpt_lastlow = IPPORT_RESERVEDMAX; 175 table->inpt_lastport = (u_int16_t)anonportmax; 176 } 177 178 int 179 in_pcballoc(struct socket *so, void *v) 180 { 181 struct inpcbtable *table = v; 182 struct inpcb *inp; 183 int s; 184 #if defined(IPSEC) || defined(FAST_IPSEC) 185 int error; 186 #endif 187 188 inp = pool_get(&inpcb_pool, PR_NOWAIT); 189 if (inp == NULL) 190 return (ENOBUFS); 191 bzero((caddr_t)inp, sizeof(*inp)); 192 inp->inp_af = AF_INET; 193 inp->inp_table = table; 194 inp->inp_socket = so; 195 inp->inp_errormtu = -1; 196 #if defined(IPSEC) || defined(FAST_IPSEC) 197 error = ipsec_init_pcbpolicy(so, &inp->inp_sp); 198 if (error != 0) { 199 pool_put(&inpcb_pool, inp); 200 return error; 201 } 202 #endif 203 so->so_pcb = inp; 204 s = splnet(); 205 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, &inp->inp_head, 206 inph_queue); 207 LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, 208 inph_lhash); 209 in_pcbstate(inp, INP_ATTACHED); 210 splx(s); 211 return (0); 212 } 213 214 int 215 in_pcbbind(void *v, struct mbuf *nam, struct proc *p) 216 { 217 struct in_ifaddr *ia = NULL; 218 struct inpcb *inp = v; 219 struct socket *so = inp->inp_socket; 220 struct inpcbtable *table = inp->inp_table; 221 struct sockaddr_in *sin; 222 u_int16_t lport = 0; 223 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 224 225 if (inp->inp_af != AF_INET) 226 return (EINVAL); 227 228 if (TAILQ_FIRST(&in_ifaddrhead) == 0) 229 return (EADDRNOTAVAIL); 230 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 231 return (EINVAL); 232 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 233 wild = 1; 234 if (nam == 0) 235 goto noname; 236 sin = mtod(nam, struct sockaddr_in *); 237 if (nam->m_len != sizeof (*sin)) 238 return (EINVAL); 239 if (sin->sin_family != AF_INET) 240 return (EAFNOSUPPORT); 241 lport = sin->sin_port; 242 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 243 /* 244 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 245 * allow complete duplication of binding if 246 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 247 * and a multicast address is bound on both 248 * new and duplicated sockets. 249 */ 250 if (so->so_options & SO_REUSEADDR) 251 reuseport = SO_REUSEADDR|SO_REUSEPORT; 252 } else if (!in_nullhost(sin->sin_addr)) { 253 sin->sin_port = 0; /* yech... */ 254 INADDR_TO_IA(sin->sin_addr, ia); 255 /* check for broadcast addresses */ 256 if (ia == NULL) 257 ia = ifatoia(ifa_ifwithaddr(sintosa(sin))); 258 if (ia == NULL) 259 return (EADDRNOTAVAIL); 260 } 261 if (lport) { 262 struct inpcb *t; 263 #ifdef INET6 264 struct in6pcb *t6; 265 struct in6_addr mapped; 266 #endif 267 #ifndef IPNOPRIVPORTS 268 /* GROSS */ 269 if (ntohs(lport) < IPPORT_RESERVED && 270 (p == 0 || kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag))) 271 return (EACCES); 272 #endif 273 #ifdef INET6 274 memset(&mapped, 0, sizeof(mapped)); 275 mapped.s6_addr16[5] = 0xffff; 276 memcpy(&mapped.s6_addr32[3], &sin->sin_addr, 277 sizeof(mapped.s6_addr32[3])); 278 t6 = in6_pcblookup_port(table, &mapped, lport, wild); 279 if (t6 && (reuseport & t6->in6p_socket->so_options) == 0) 280 return (EADDRINUSE); 281 #endif 282 if (so->so_uidinfo->ui_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 283 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 284 /* 285 * XXX: investigate ramifications of loosening this 286 * restriction so that as long as both ports have 287 * SO_REUSEPORT allow the bind 288 */ 289 if (t && 290 (!in_nullhost(sin->sin_addr) || 291 !in_nullhost(t->inp_laddr) || 292 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 293 && (so->so_uidinfo->ui_uid != t->inp_socket->so_uidinfo->ui_uid)) { 294 return (EADDRINUSE); 295 } 296 } 297 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 298 if (t && (reuseport & t->inp_socket->so_options) == 0) 299 return (EADDRINUSE); 300 } 301 inp->inp_laddr = sin->sin_addr; 302 303 noname: 304 if (lport == 0) { 305 int cnt; 306 u_int16_t mymin, mymax; 307 u_int16_t *lastport; 308 309 if (inp->inp_flags & INP_LOWPORT) { 310 #ifndef IPNOPRIVPORTS 311 if (p == 0 || kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, 312 &p->p_acflag)) 313 return (EACCES); 314 #endif 315 mymin = lowportmin; 316 mymax = lowportmax; 317 lastport = &table->inpt_lastlow; 318 } else { 319 mymin = anonportmin; 320 mymax = anonportmax; 321 lastport = &table->inpt_lastport; 322 } 323 if (mymin > mymax) { /* sanity check */ 324 u_int16_t swp; 325 326 swp = mymin; 327 mymin = mymax; 328 mymax = swp; 329 } 330 331 lport = *lastport - 1; 332 for (cnt = mymax - mymin + 1; cnt; cnt--, lport--) { 333 if (lport < mymin || lport > mymax) 334 lport = mymax; 335 if (!in_pcblookup_port(table, inp->inp_laddr, 336 htons(lport), 1)) 337 goto found; 338 } 339 if (!in_nullhost(inp->inp_laddr)) 340 inp->inp_laddr.s_addr = INADDR_ANY; 341 return (EAGAIN); 342 found: 343 inp->inp_flags |= INP_ANONPORT; 344 *lastport = lport; 345 lport = htons(lport); 346 } 347 inp->inp_lport = lport; 348 LIST_REMOVE(&inp->inp_head, inph_lhash); 349 LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, 350 inph_lhash); 351 in_pcbstate(inp, INP_BOUND); 352 return (0); 353 } 354 355 /* 356 * Connect from a socket to a specified address. 357 * Both address and port must be specified in argument sin. 358 * If don't have a local address for this socket yet, 359 * then pick one. 360 */ 361 int 362 in_pcbconnect(void *v, struct mbuf *nam, struct proc *p) 363 { 364 struct inpcb *inp = v; 365 struct in_ifaddr *ia = NULL; 366 struct sockaddr_in *ifaddr = NULL; 367 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 368 int error; 369 370 if (inp->inp_af != AF_INET) 371 return (EINVAL); 372 373 if (nam->m_len != sizeof (*sin)) 374 return (EINVAL); 375 if (sin->sin_family != AF_INET) 376 return (EAFNOSUPPORT); 377 if (sin->sin_port == 0) 378 return (EADDRNOTAVAIL); 379 if (TAILQ_FIRST(&in_ifaddrhead) != 0) { 380 /* 381 * If the destination address is INADDR_ANY, 382 * use any local address (likely loopback). 383 * If the supplied address is INADDR_BROADCAST, 384 * use the broadcast address of an interface 385 * which supports broadcast. (loopback does not) 386 */ 387 388 if (in_nullhost(sin->sin_addr)) { 389 sin->sin_addr = 390 TAILQ_FIRST(&in_ifaddrhead)->ia_addr.sin_addr; 391 } else if (sin->sin_addr.s_addr == INADDR_BROADCAST) { 392 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { 393 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 394 sin->sin_addr = 395 ia->ia_broadaddr.sin_addr; 396 break; 397 } 398 } 399 } 400 } 401 /* 402 * If we haven't bound which network number to use as ours, 403 * we will use the number of the outgoing interface. 404 * This depends on having done a routing lookup, which 405 * we will probably have to do anyway, so we might 406 * as well do it now. On the other hand if we are 407 * sending to multiple destinations we may have already 408 * done the lookup, so see if we can use the route 409 * from before. In any case, we only 410 * chose a port number once, even if sending to multiple 411 * destinations. 412 */ 413 if (in_nullhost(inp->inp_laddr)) { 414 int xerror; 415 ifaddr = in_selectsrc(sin, &inp->inp_route, 416 inp->inp_socket->so_options, inp->inp_moptions, &xerror); 417 if (ifaddr == NULL) { 418 if (xerror == 0) 419 xerror = EADDRNOTAVAIL; 420 return xerror; 421 } 422 INADDR_TO_IA(ifaddr->sin_addr, ia); 423 if (ia == NULL) 424 return (EADDRNOTAVAIL); 425 } 426 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 427 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 428 inp->inp_lport) != 0) 429 return (EADDRINUSE); 430 if (in_nullhost(inp->inp_laddr)) { 431 if (inp->inp_lport == 0) { 432 error = in_pcbbind(inp, NULL, p); 433 /* 434 * This used to ignore the return value 435 * completely, but we need to check for 436 * ephemeral port shortage. 437 * And attempts to request low ports if not root. 438 */ 439 if (error != 0) 440 return (error); 441 } 442 inp->inp_laddr = ifaddr->sin_addr; 443 } 444 inp->inp_faddr = sin->sin_addr; 445 inp->inp_fport = sin->sin_port; 446 in_pcbstate(inp, INP_CONNECTED); 447 #if defined(IPSEC) || defined(FAST_IPSEC) 448 if (inp->inp_socket->so_type == SOCK_STREAM) 449 ipsec_pcbconn(inp->inp_sp); 450 #endif 451 return (0); 452 } 453 454 void 455 in_pcbdisconnect(void *v) 456 { 457 struct inpcb *inp = v; 458 459 if (inp->inp_af != AF_INET) 460 return; 461 462 inp->inp_faddr = zeroin_addr; 463 inp->inp_fport = 0; 464 in_pcbstate(inp, INP_BOUND); 465 #if defined(IPSEC) || defined(FAST_IPSEC) 466 ipsec_pcbdisconn(inp->inp_sp); 467 #endif 468 if (inp->inp_socket->so_state & SS_NOFDREF) 469 in_pcbdetach(inp); 470 } 471 472 void 473 in_pcbdetach(void *v) 474 { 475 struct inpcb *inp = v; 476 struct socket *so = inp->inp_socket; 477 int s; 478 479 if (inp->inp_af != AF_INET) 480 return; 481 482 #if defined(IPSEC) || defined(FAST_IPSEC) 483 ipsec4_delete_pcbpolicy(inp); 484 #endif /*IPSEC*/ 485 so->so_pcb = 0; 486 sofree(so); 487 if (inp->inp_options) 488 (void)m_free(inp->inp_options); 489 if (inp->inp_route.ro_rt) 490 rtfree(inp->inp_route.ro_rt); 491 ip_freemoptions(inp->inp_moptions); 492 s = splnet(); 493 in_pcbstate(inp, INP_ATTACHED); 494 LIST_REMOVE(&inp->inp_head, inph_lhash); 495 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, &inp->inp_head, 496 inph_queue); 497 splx(s); 498 pool_put(&inpcb_pool, inp); 499 } 500 501 void 502 in_setsockaddr(struct inpcb *inp, struct mbuf *nam) 503 { 504 struct sockaddr_in *sin; 505 506 if (inp->inp_af != AF_INET) 507 return; 508 509 nam->m_len = sizeof (*sin); 510 sin = mtod(nam, struct sockaddr_in *); 511 bzero((caddr_t)sin, sizeof (*sin)); 512 sin->sin_family = AF_INET; 513 sin->sin_len = sizeof(*sin); 514 sin->sin_port = inp->inp_lport; 515 sin->sin_addr = inp->inp_laddr; 516 } 517 518 void 519 in_setpeeraddr(struct inpcb *inp, struct mbuf *nam) 520 { 521 struct sockaddr_in *sin; 522 523 if (inp->inp_af != AF_INET) 524 return; 525 526 nam->m_len = sizeof (*sin); 527 sin = mtod(nam, struct sockaddr_in *); 528 bzero((caddr_t)sin, sizeof (*sin)); 529 sin->sin_family = AF_INET; 530 sin->sin_len = sizeof(*sin); 531 sin->sin_port = inp->inp_fport; 532 sin->sin_addr = inp->inp_faddr; 533 } 534 535 /* 536 * Pass some notification to all connections of a protocol 537 * associated with address dst. The local address and/or port numbers 538 * may be specified to limit the search. The "usual action" will be 539 * taken, depending on the ctlinput cmd. The caller must filter any 540 * cmds that are uninteresting (e.g., no error in the map). 541 * Call the protocol specific routine (if any) to report 542 * any errors for each matching socket. 543 * 544 * Must be called at splsoftnet. 545 */ 546 int 547 in_pcbnotify(struct inpcbtable *table, struct in_addr faddr, u_int fport_arg, 548 struct in_addr laddr, u_int lport_arg, int errno, 549 void (*notify)(struct inpcb *, int)) 550 { 551 struct inpcbhead *head; 552 struct inpcb *inp, *ninp; 553 u_int16_t fport = fport_arg, lport = lport_arg; 554 int nmatch; 555 556 if (in_nullhost(faddr) || notify == 0) 557 return (0); 558 559 nmatch = 0; 560 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 561 for (inp = (struct inpcb *)LIST_FIRST(head); inp != NULL; inp = ninp) { 562 ninp = (struct inpcb *)LIST_NEXT(inp, inp_hash); 563 if (inp->inp_af != AF_INET) 564 continue; 565 if (in_hosteq(inp->inp_faddr, faddr) && 566 inp->inp_fport == fport && 567 inp->inp_lport == lport && 568 in_hosteq(inp->inp_laddr, laddr)) { 569 (*notify)(inp, errno); 570 nmatch++; 571 } 572 } 573 return (nmatch); 574 } 575 576 void 577 in_pcbnotifyall(struct inpcbtable *table, struct in_addr faddr, int errno, 578 void (*notify)(struct inpcb *, int)) 579 { 580 struct inpcb *inp, *ninp; 581 582 if (in_nullhost(faddr) || notify == 0) 583 return; 584 585 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 586 inp != (void *)&table->inpt_queue; 587 inp = ninp) { 588 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 589 if (inp->inp_af != AF_INET) 590 continue; 591 if (in_hosteq(inp->inp_faddr, faddr)) 592 (*notify)(inp, errno); 593 } 594 } 595 596 void 597 in_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 598 { 599 struct inpcb *inp, *ninp; 600 struct ip_moptions *imo; 601 int i, gap; 602 603 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 604 inp != (void *)&table->inpt_queue; 605 inp = ninp) { 606 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 607 if (inp->inp_af != AF_INET) 608 continue; 609 imo = inp->inp_moptions; 610 if (imo != NULL) { 611 /* 612 * Unselect the outgoing interface if it is being 613 * detached. 614 */ 615 if (imo->imo_multicast_ifp == ifp) 616 imo->imo_multicast_ifp = NULL; 617 618 /* 619 * Drop multicast group membership if we joined 620 * through the interface being detached. 621 */ 622 for (i = 0, gap = 0; i < imo->imo_num_memberships; 623 i++) { 624 if (imo->imo_membership[i]->inm_ifp == ifp) { 625 in_delmulti(imo->imo_membership[i]); 626 gap++; 627 } else if (gap != 0) 628 imo->imo_membership[i - gap] = 629 imo->imo_membership[i]; 630 } 631 imo->imo_num_memberships -= gap; 632 } 633 } 634 } 635 636 void 637 in_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 638 { 639 struct inpcb *inp, *ninp; 640 641 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 642 inp != (void *)&table->inpt_queue; 643 inp = ninp) { 644 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 645 if (inp->inp_af != AF_INET) 646 continue; 647 if (inp->inp_route.ro_rt != NULL && 648 inp->inp_route.ro_rt->rt_ifp == ifp) 649 in_rtchange(inp, 0); 650 } 651 } 652 653 /* 654 * Check for alternatives when higher level complains 655 * about service problems. For now, invalidate cached 656 * routing information. If the route was created dynamically 657 * (by a redirect), time to try a default gateway again. 658 */ 659 void 660 in_losing(struct inpcb *inp) 661 { 662 struct rtentry *rt; 663 struct rt_addrinfo info; 664 665 if (inp->inp_af != AF_INET) 666 return; 667 668 if ((rt = inp->inp_route.ro_rt)) { 669 inp->inp_route.ro_rt = 0; 670 bzero((caddr_t)&info, sizeof(info)); 671 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 672 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 673 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 674 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 675 if (rt->rt_flags & RTF_DYNAMIC) 676 (void) rtrequest(RTM_DELETE, rt_key(rt), 677 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 678 (struct rtentry **)0); 679 else 680 /* 681 * A new route can be allocated 682 * the next time output is attempted. 683 */ 684 rtfree(rt); 685 } 686 } 687 688 /* 689 * After a routing change, flush old routing 690 * and allocate a (hopefully) better one. 691 */ 692 void 693 in_rtchange(struct inpcb *inp, int errno) 694 { 695 696 if (inp->inp_af != AF_INET) 697 return; 698 699 if (inp->inp_route.ro_rt) { 700 rtfree(inp->inp_route.ro_rt); 701 inp->inp_route.ro_rt = 0; 702 /* 703 * A new route can be allocated the next time 704 * output is attempted. 705 */ 706 } 707 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 708 } 709 710 struct inpcb * 711 in_pcblookup_port(struct inpcbtable *table, struct in_addr laddr, 712 u_int lport_arg, int lookup_wildcard) 713 { 714 struct inpcbhead *head; 715 struct inpcb_hdr *inph; 716 struct inpcb *inp, *match = 0; 717 int matchwild = 3, wildcard; 718 u_int16_t lport = lport_arg; 719 720 head = INPCBHASH_PORT(table, lport); 721 LIST_FOREACH(inph, head, inph_lhash) { 722 inp = (struct inpcb *)inph; 723 if (inp->inp_af != AF_INET) 724 continue; 725 726 if (inp->inp_lport != lport) 727 continue; 728 wildcard = 0; 729 if (!in_nullhost(inp->inp_faddr)) 730 wildcard++; 731 if (in_nullhost(inp->inp_laddr)) { 732 if (!in_nullhost(laddr)) 733 wildcard++; 734 } else { 735 if (in_nullhost(laddr)) 736 wildcard++; 737 else { 738 if (!in_hosteq(inp->inp_laddr, laddr)) 739 continue; 740 } 741 } 742 if (wildcard && !lookup_wildcard) 743 continue; 744 if (wildcard < matchwild) { 745 match = inp; 746 matchwild = wildcard; 747 if (matchwild == 0) 748 break; 749 } 750 } 751 return (match); 752 } 753 754 #ifdef DIAGNOSTIC 755 int in_pcbnotifymiss = 0; 756 #endif 757 758 struct inpcb * 759 in_pcblookup_connect(struct inpcbtable *table, 760 struct in_addr faddr, u_int fport_arg, 761 struct in_addr laddr, u_int lport_arg) 762 { 763 struct inpcbhead *head; 764 struct inpcb_hdr *inph; 765 struct inpcb *inp; 766 u_int16_t fport = fport_arg, lport = lport_arg; 767 768 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 769 LIST_FOREACH(inph, head, inph_hash) { 770 inp = (struct inpcb *)inph; 771 if (inp->inp_af != AF_INET) 772 continue; 773 774 if (in_hosteq(inp->inp_faddr, faddr) && 775 inp->inp_fport == fport && 776 inp->inp_lport == lport && 777 in_hosteq(inp->inp_laddr, laddr)) 778 goto out; 779 } 780 #ifdef DIAGNOSTIC 781 if (in_pcbnotifymiss) { 782 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 783 ntohl(faddr.s_addr), ntohs(fport), 784 ntohl(laddr.s_addr), ntohs(lport)); 785 } 786 #endif 787 return (0); 788 789 out: 790 /* Move this PCB to the head of hash chain. */ 791 inph = &inp->inp_head; 792 if (inph != LIST_FIRST(head)) { 793 LIST_REMOVE(inph, inph_hash); 794 LIST_INSERT_HEAD(head, inph, inph_hash); 795 } 796 return (inp); 797 } 798 799 struct inpcb * 800 in_pcblookup_bind(struct inpcbtable *table, 801 struct in_addr laddr, u_int lport_arg) 802 { 803 struct inpcbhead *head; 804 struct inpcb_hdr *inph; 805 struct inpcb *inp; 806 u_int16_t lport = lport_arg; 807 808 head = INPCBHASH_BIND(table, laddr, lport); 809 LIST_FOREACH(inph, head, inph_hash) { 810 inp = (struct inpcb *)inph; 811 if (inp->inp_af != AF_INET) 812 continue; 813 814 if (inp->inp_lport == lport && 815 in_hosteq(inp->inp_laddr, laddr)) 816 goto out; 817 } 818 head = INPCBHASH_BIND(table, zeroin_addr, lport); 819 LIST_FOREACH(inph, head, inph_hash) { 820 inp = (struct inpcb *)inph; 821 if (inp->inp_af != AF_INET) 822 continue; 823 824 if (inp->inp_lport == lport && 825 in_hosteq(inp->inp_laddr, zeroin_addr)) 826 goto out; 827 } 828 #ifdef DIAGNOSTIC 829 if (in_pcbnotifymiss) { 830 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 831 ntohl(laddr.s_addr), ntohs(lport)); 832 } 833 #endif 834 return (0); 835 836 out: 837 /* Move this PCB to the head of hash chain. */ 838 inph = &inp->inp_head; 839 if (inph != LIST_FIRST(head)) { 840 LIST_REMOVE(inph, inph_hash); 841 LIST_INSERT_HEAD(head, inph, inph_hash); 842 } 843 return (inp); 844 } 845 846 void 847 in_pcbstate(struct inpcb *inp, int state) 848 { 849 850 if (inp->inp_af != AF_INET) 851 return; 852 853 if (inp->inp_state > INP_ATTACHED) 854 LIST_REMOVE(&inp->inp_head, inph_hash); 855 856 switch (state) { 857 case INP_BOUND: 858 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 859 inp->inp_laddr, inp->inp_lport), &inp->inp_head, 860 inph_hash); 861 break; 862 case INP_CONNECTED: 863 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 864 inp->inp_faddr, inp->inp_fport, 865 inp->inp_laddr, inp->inp_lport), &inp->inp_head, 866 inph_hash); 867 break; 868 } 869 870 inp->inp_state = state; 871 } 872 873 struct rtentry * 874 in_pcbrtentry(struct inpcb *inp) 875 { 876 struct route *ro; 877 878 if (inp->inp_af != AF_INET) 879 return (NULL); 880 881 ro = &inp->inp_route; 882 883 if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || 884 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, inp->inp_faddr))) { 885 RTFREE(ro->ro_rt); 886 ro->ro_rt = (struct rtentry *)NULL; 887 } 888 if (ro->ro_rt == (struct rtentry *)NULL && 889 !in_nullhost(inp->inp_faddr)) { 890 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 891 ro->ro_dst.sa_family = AF_INET; 892 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 893 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 894 rtalloc(ro); 895 } 896 return (ro->ro_rt); 897 } 898 899 struct sockaddr_in * 900 in_selectsrc(struct sockaddr_in *sin, struct route *ro, 901 int soopts, struct ip_moptions *mopts, int *errorp) 902 { 903 struct in_ifaddr *ia; 904 905 ia = (struct in_ifaddr *)0; 906 /* 907 * If route is known or can be allocated now, 908 * our src addr is taken from the i/f, else punt. 909 * Note that we should check the address family of the cached 910 * destination, in case of sharing the cache with IPv6. 911 */ 912 if (ro->ro_rt && 913 (ro->ro_dst.sa_family != AF_INET || 914 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 915 soopts & SO_DONTROUTE)) { 916 RTFREE(ro->ro_rt); 917 ro->ro_rt = (struct rtentry *)0; 918 } 919 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 920 (ro->ro_rt == (struct rtentry *)0 || 921 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 922 /* No route yet, so try to acquire one */ 923 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 924 ro->ro_dst.sa_family = AF_INET; 925 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 926 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 927 rtalloc(ro); 928 } 929 /* 930 * If we found a route, use the address 931 * corresponding to the outgoing interface 932 * unless it is the loopback (in case a route 933 * to our address on another net goes to loopback). 934 * 935 * XXX Is this still true? Do we care? 936 */ 937 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 938 ia = ifatoia(ro->ro_rt->rt_ifa); 939 if (ia == NULL) { 940 u_int16_t fport = sin->sin_port; 941 942 sin->sin_port = 0; 943 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 944 sin->sin_port = fport; 945 if (ia == 0) { 946 /* Find 1st non-loopback AF_INET address */ 947 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { 948 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 949 break; 950 } 951 } 952 if (ia == NULL) { 953 *errorp = EADDRNOTAVAIL; 954 return NULL; 955 } 956 } 957 /* 958 * If the destination address is multicast and an outgoing 959 * interface has been set as a multicast option, use the 960 * address of that interface as our source address. 961 */ 962 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 963 struct ip_moptions *imo; 964 struct ifnet *ifp; 965 966 imo = mopts; 967 if (imo->imo_multicast_ifp != NULL) { 968 ifp = imo->imo_multicast_ifp; 969 IFP_TO_IA(ifp, ia); /* XXX */ 970 if (ia == 0) { 971 *errorp = EADDRNOTAVAIL; 972 return NULL; 973 } 974 } 975 } 976 return satosin(&ia->ia_addr); 977 } 978
Indexes created Tue Oct 14 21:09:58 GMT 2025