in_pcb.c revision 1.92
1 /* $NetBSD: in_pcb.c,v 1.92 2004/01/02 15:51:45 itojun 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 1.92 2004/01/02 15:51:45 itojun 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> 118 119 #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> 128 129 #ifdef INET6 130 #include <netinet/ip6.h> 131 #include <netinet6/ip6_var.h> 132 #include <netinet6/in6_pcb.h> 133 #endif 134 135 #ifdef IPSEC 136 #include <netinet6/ipsec.h> 137 #include <netkey/key.h> 138 #elif FAST_IPSEC 139 #include <netipsec/ipsec.h> 140 #include <netipsec/key.h> 141 #endif /* IPSEC */ 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 struct pool inpcb_pool; 161 162 void 163 in_pcbinit(table, bindhashsize, connecthashsize) 164 struct inpcbtable *table; 165 int bindhashsize, connecthashsize; 166 { 167 static int inpcb_pool_initialized; 168 169 if (inpcb_pool_initialized == 0) { 170 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 171 "inpcbpl", NULL); 172 inpcb_pool_initialized = 1; 173 } 174 175 CIRCLEQ_INIT(&table->inpt_queue); 176 table->inpt_porthashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 177 M_WAITOK, &table->inpt_porthash); 178 table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 179 M_WAITOK, &table->inpt_bindhash); 180 table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, 181 M_PCB, M_WAITOK, &table->inpt_connecthash); 182 table->inpt_lastlow = IPPORT_RESERVEDMAX; 183 table->inpt_lastport = (u_int16_t)anonportmax; 184 } 185 186 int 187 in_pcballoc(so, v) 188 struct socket *so; 189 void *v; 190 { 191 struct inpcbtable *table = v; 192 struct inpcb *inp; 193 int s; 194 #if defined(IPSEC) || defined(FAST_IPSEC) 195 int error; 196 #endif 197 198 inp = pool_get(&inpcb_pool, PR_NOWAIT); 199 if (inp == NULL) 200 return (ENOBUFS); 201 bzero((caddr_t)inp, sizeof(*inp)); 202 inp->inp_af = AF_INET; 203 inp->inp_table = table; 204 inp->inp_socket = so; 205 inp->inp_errormtu = -1; 206 #if defined(IPSEC) || defined(FAST_IPSEC) 207 error = ipsec_init_pcbpolicy(so, &inp->inp_sp); 208 if (error != 0) { 209 pool_put(&inpcb_pool, inp); 210 return error; 211 } 212 #endif 213 so->so_pcb = inp; 214 s = splnet(); 215 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, &inp->inp_head, 216 inph_queue); 217 LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, 218 inph_lhash); 219 in_pcbstate(inp, INP_ATTACHED); 220 splx(s); 221 return (0); 222 } 223 224 int 225 in_pcbbind(v, nam, p) 226 void *v; 227 struct mbuf *nam; 228 struct proc *p; 229 { 230 struct in_ifaddr *ia = NULL; 231 struct inpcb *inp = v; 232 struct socket *so = inp->inp_socket; 233 struct inpcbtable *table = inp->inp_table; 234 struct sockaddr_in *sin; 235 u_int16_t lport = 0; 236 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 237 238 if (inp->inp_af != AF_INET) 239 return (EINVAL); 240 241 if (TAILQ_FIRST(&in_ifaddrhead) == 0) 242 return (EADDRNOTAVAIL); 243 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 244 return (EINVAL); 245 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 246 wild = 1; 247 if (nam == 0) 248 goto noname; 249 sin = mtod(nam, struct sockaddr_in *); 250 if (nam->m_len != sizeof (*sin)) 251 return (EINVAL); 252 if (sin->sin_family != AF_INET) 253 return (EAFNOSUPPORT); 254 lport = sin->sin_port; 255 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 256 /* 257 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 258 * allow complete duplication of binding if 259 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 260 * and a multicast address is bound on both 261 * new and duplicated sockets. 262 */ 263 if (so->so_options & SO_REUSEADDR) 264 reuseport = SO_REUSEADDR|SO_REUSEPORT; 265 } else if (!in_nullhost(sin->sin_addr)) { 266 sin->sin_port = 0; /* yech... */ 267 INADDR_TO_IA(sin->sin_addr, ia); 268 /* check for broadcast addresses */ 269 if (ia == NULL) 270 ia = ifatoia(ifa_ifwithaddr(sintosa(sin))); 271 if (ia == NULL) 272 return (EADDRNOTAVAIL); 273 } 274 if (lport) { 275 struct inpcb *t; 276 #ifdef INET6 277 struct in6pcb *t6; 278 struct in6_addr mapped; 279 #endif 280 #ifndef IPNOPRIVPORTS 281 /* GROSS */ 282 if (ntohs(lport) < IPPORT_RESERVED && 283 (p == 0 || suser(p->p_ucred, &p->p_acflag))) 284 return (EACCES); 285 #endif 286 #ifdef INET6 287 memset(&mapped, 0, sizeof(mapped)); 288 mapped.s6_addr16[5] = 0xffff; 289 memcpy(&mapped.s6_addr32[3], &sin->sin_addr, 290 sizeof(mapped.s6_addr32[3])); 291 t6 = in6_pcblookup_port(table, &mapped, lport, wild); 292 if (t6 && (reuseport & t6->in6p_socket->so_options) == 0) 293 return (EADDRINUSE); 294 #endif 295 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 296 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 297 /* 298 * XXX: investigate ramifications of loosening this 299 * restriction so that as long as both ports have 300 * SO_REUSEPORT allow the bind 301 */ 302 if (t && 303 (!in_nullhost(sin->sin_addr) || 304 !in_nullhost(t->inp_laddr) || 305 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 306 && (so->so_uid != t->inp_socket->so_uid)) { 307 return (EADDRINUSE); 308 } 309 } 310 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 311 if (t && (reuseport & t->inp_socket->so_options) == 0) 312 return (EADDRINUSE); 313 } 314 inp->inp_laddr = sin->sin_addr; 315 316 noname: 317 if (lport == 0) { 318 int cnt; 319 u_int16_t min, max; 320 u_int16_t *lastport; 321 322 if (inp->inp_flags & INP_LOWPORT) { 323 #ifndef IPNOPRIVPORTS 324 if (p == 0 || suser(p->p_ucred, &p->p_acflag)) 325 return (EACCES); 326 #endif 327 min = lowportmin; 328 max = lowportmax; 329 lastport = &table->inpt_lastlow; 330 } else { 331 min = anonportmin; 332 max = anonportmax; 333 lastport = &table->inpt_lastport; 334 } 335 if (min > max) { /* sanity check */ 336 u_int16_t swp; 337 338 swp = min; 339 min = max; 340 max = swp; 341 } 342 343 lport = *lastport - 1; 344 for (cnt = max - min + 1; cnt; cnt--, lport--) { 345 if (lport < min || lport > max) 346 lport = max; 347 if (!in_pcblookup_port(table, inp->inp_laddr, 348 htons(lport), 1)) 349 goto found; 350 } 351 if (!in_nullhost(inp->inp_laddr)) 352 inp->inp_laddr.s_addr = INADDR_ANY; 353 return (EAGAIN); 354 found: 355 inp->inp_flags |= INP_ANONPORT; 356 *lastport = lport; 357 lport = htons(lport); 358 } 359 inp->inp_lport = lport; 360 LIST_REMOVE(&inp->inp_head, inph_lhash); 361 LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, 362 inph_lhash); 363 in_pcbstate(inp, INP_BOUND); 364 return (0); 365 } 366 367 /* 368 * Connect from a socket to a specified address. 369 * Both address and port must be specified in argument sin. 370 * If don't have a local address for this socket yet, 371 * then pick one. 372 */ 373 int 374 in_pcbconnect(v, nam) 375 void *v; 376 struct mbuf *nam; 377 { 378 struct inpcb *inp = v; 379 struct in_ifaddr *ia = NULL; 380 struct sockaddr_in *ifaddr = NULL; 381 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 382 int error; 383 384 if (inp->inp_af != AF_INET) 385 return (EINVAL); 386 387 if (nam->m_len != sizeof (*sin)) 388 return (EINVAL); 389 if (sin->sin_family != AF_INET) 390 return (EAFNOSUPPORT); 391 if (sin->sin_port == 0) 392 return (EADDRNOTAVAIL); 393 if (TAILQ_FIRST(&in_ifaddrhead) != 0) { 394 /* 395 * If the destination address is INADDR_ANY, 396 * use any local address (likely loopback). 397 * If the supplied address is INADDR_BROADCAST, 398 * use the broadcast address of an interface 399 * which supports broadcast. (loopback does not) 400 */ 401 402 if (in_nullhost(sin->sin_addr)) { 403 sin->sin_addr = 404 TAILQ_FIRST(&in_ifaddrhead)->ia_addr.sin_addr; 405 } else if (sin->sin_addr.s_addr == INADDR_BROADCAST) { 406 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { 407 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 408 sin->sin_addr = 409 ia->ia_broadaddr.sin_addr; 410 break; 411 } 412 } 413 } 414 } 415 /* 416 * If we haven't bound which network number to use as ours, 417 * we will use the number of the outgoing interface. 418 * This depends on having done a routing lookup, which 419 * we will probably have to do anyway, so we might 420 * as well do it now. On the other hand if we are 421 * sending to multiple destinations we may have already 422 * done the lookup, so see if we can use the route 423 * from before. In any case, we only 424 * chose a port number once, even if sending to multiple 425 * destinations. 426 */ 427 if (in_nullhost(inp->inp_laddr)) { 428 int error; 429 ifaddr = in_selectsrc(sin, &inp->inp_route, 430 inp->inp_socket->so_options, inp->inp_moptions, &error); 431 if (ifaddr == NULL) { 432 if (error == 0) 433 error = EADDRNOTAVAIL; 434 return error; 435 } 436 INADDR_TO_IA(ifaddr->sin_addr, ia); 437 if (ia == NULL) 438 return (EADDRNOTAVAIL); 439 } 440 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 441 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 442 inp->inp_lport) != 0) 443 return (EADDRINUSE); 444 if (in_nullhost(inp->inp_laddr)) { 445 if (inp->inp_lport == 0) { 446 error = in_pcbbind(inp, (struct mbuf *)0, 447 (struct proc *)0); 448 /* 449 * This used to ignore the return value 450 * completely, but we need to check for 451 * ephemeral port shortage. 452 * XXX Should we check for other errors, too? 453 */ 454 if (error == EAGAIN) 455 return (error); 456 } 457 inp->inp_laddr = ia->ia_addr.sin_addr; 458 inp->inp_laddr = ifaddr->sin_addr; 459 } 460 inp->inp_faddr = sin->sin_addr; 461 inp->inp_fport = sin->sin_port; 462 in_pcbstate(inp, INP_CONNECTED); 463 #if defined(IPSEC) /*|| defined(FAST_IPSEC)*/ /*XXX*/ 464 if (inp->inp_socket->so_type == SOCK_STREAM) 465 ipsec_pcbconn(inp->inp_sp); 466 #endif 467 return (0); 468 } 469 470 void 471 in_pcbdisconnect(v) 472 void *v; 473 { 474 struct inpcb *inp = v; 475 476 if (inp->inp_af != AF_INET) 477 return; 478 479 inp->inp_faddr = zeroin_addr; 480 inp->inp_fport = 0; 481 in_pcbstate(inp, INP_BOUND); 482 if (inp->inp_socket->so_state & SS_NOFDREF) 483 in_pcbdetach(inp); 484 #if defined(IPSEC) /*|| defined(FAST_IPSEC)*/ /*XXX*/ 485 ipsec_pcbdisconn(inp->inp_sp); 486 #endif 487 } 488 489 void 490 in_pcbdetach(v) 491 void *v; 492 { 493 struct inpcb *inp = v; 494 struct socket *so = inp->inp_socket; 495 int s; 496 497 if (inp->inp_af != AF_INET) 498 return; 499 500 #if defined(IPSEC) || defined(FAST_IPSEC) 501 ipsec4_delete_pcbpolicy(inp); 502 #endif /*IPSEC*/ 503 so->so_pcb = 0; 504 sofree(so); 505 if (inp->inp_options) 506 (void)m_free(inp->inp_options); 507 if (inp->inp_route.ro_rt) 508 rtfree(inp->inp_route.ro_rt); 509 ip_freemoptions(inp->inp_moptions); 510 s = splnet(); 511 in_pcbstate(inp, INP_ATTACHED); 512 LIST_REMOVE(&inp->inp_head, inph_lhash); 513 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, &inp->inp_head, 514 inph_queue); 515 splx(s); 516 pool_put(&inpcb_pool, inp); 517 } 518 519 void 520 in_setsockaddr(inp, nam) 521 struct inpcb *inp; 522 struct mbuf *nam; 523 { 524 struct sockaddr_in *sin; 525 526 if (inp->inp_af != AF_INET) 527 return; 528 529 nam->m_len = sizeof (*sin); 530 sin = mtod(nam, struct sockaddr_in *); 531 bzero((caddr_t)sin, sizeof (*sin)); 532 sin->sin_family = AF_INET; 533 sin->sin_len = sizeof(*sin); 534 sin->sin_port = inp->inp_lport; 535 sin->sin_addr = inp->inp_laddr; 536 } 537 538 void 539 in_setpeeraddr(inp, nam) 540 struct inpcb *inp; 541 struct mbuf *nam; 542 { 543 struct sockaddr_in *sin; 544 545 if (inp->inp_af != AF_INET) 546 return; 547 548 nam->m_len = sizeof (*sin); 549 sin = mtod(nam, struct sockaddr_in *); 550 bzero((caddr_t)sin, sizeof (*sin)); 551 sin->sin_family = AF_INET; 552 sin->sin_len = sizeof(*sin); 553 sin->sin_port = inp->inp_fport; 554 sin->sin_addr = inp->inp_faddr; 555 } 556 557 /* 558 * Pass some notification to all connections of a protocol 559 * associated with address dst. The local address and/or port numbers 560 * may be specified to limit the search. The "usual action" will be 561 * taken, depending on the ctlinput cmd. The caller must filter any 562 * cmds that are uninteresting (e.g., no error in the map). 563 * Call the protocol specific routine (if any) to report 564 * any errors for each matching socket. 565 * 566 * Must be called at splsoftnet. 567 */ 568 int 569 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 570 struct inpcbtable *table; 571 struct in_addr faddr, laddr; 572 u_int fport_arg, lport_arg; 573 int errno; 574 void (*notify) __P((struct inpcb *, int)); 575 { 576 struct inpcbhead *head; 577 struct inpcb *inp, *ninp; 578 u_int16_t fport = fport_arg, lport = lport_arg; 579 int nmatch; 580 581 if (in_nullhost(faddr) || notify == 0) 582 return (0); 583 584 nmatch = 0; 585 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 586 for (inp = (struct inpcb *)LIST_FIRST(head); inp != NULL; inp = ninp) { 587 ninp = (struct inpcb *)LIST_NEXT(inp, inp_hash); 588 if (inp->inp_af != AF_INET) 589 continue; 590 if (in_hosteq(inp->inp_faddr, faddr) && 591 inp->inp_fport == fport && 592 inp->inp_lport == lport && 593 in_hosteq(inp->inp_laddr, laddr)) { 594 (*notify)(inp, errno); 595 nmatch++; 596 } 597 } 598 return (nmatch); 599 } 600 601 void 602 in_pcbnotifyall(table, faddr, errno, notify) 603 struct inpcbtable *table; 604 struct in_addr faddr; 605 int errno; 606 void (*notify) __P((struct inpcb *, int)); 607 { 608 struct inpcb *inp, *ninp; 609 610 if (in_nullhost(faddr) || notify == 0) 611 return; 612 613 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 614 inp != (void *)&table->inpt_queue; 615 inp = ninp) { 616 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 617 if (inp->inp_af != AF_INET) 618 continue; 619 if (in_hosteq(inp->inp_faddr, faddr)) 620 (*notify)(inp, errno); 621 } 622 } 623 624 void 625 in_pcbpurgeif0(table, ifp) 626 struct inpcbtable *table; 627 struct ifnet *ifp; 628 { 629 struct inpcb *inp, *ninp; 630 struct ip_moptions *imo; 631 int i, gap; 632 633 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 634 inp != (void *)&table->inpt_queue; 635 inp = ninp) { 636 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 637 if (inp->inp_af != AF_INET) 638 continue; 639 imo = inp->inp_moptions; 640 if (imo != NULL) { 641 /* 642 * Unselect the outgoing interface if it is being 643 * detached. 644 */ 645 if (imo->imo_multicast_ifp == ifp) 646 imo->imo_multicast_ifp = NULL; 647 648 /* 649 * Drop multicast group membership if we joined 650 * through the interface being detached. 651 */ 652 for (i = 0, gap = 0; i < imo->imo_num_memberships; 653 i++) { 654 if (imo->imo_membership[i]->inm_ifp == ifp) { 655 in_delmulti(imo->imo_membership[i]); 656 gap++; 657 } else if (gap != 0) 658 imo->imo_membership[i - gap] = 659 imo->imo_membership[i]; 660 } 661 imo->imo_num_memberships -= gap; 662 } 663 } 664 } 665 666 void 667 in_pcbpurgeif(table, ifp) 668 struct inpcbtable *table; 669 struct ifnet *ifp; 670 { 671 struct inpcb *inp, *ninp; 672 673 for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); 674 inp != (void *)&table->inpt_queue; 675 inp = ninp) { 676 ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); 677 if (inp->inp_af != AF_INET) 678 continue; 679 if (inp->inp_route.ro_rt != NULL && 680 inp->inp_route.ro_rt->rt_ifp == ifp) 681 in_rtchange(inp, 0); 682 } 683 } 684 685 /* 686 * Check for alternatives when higher level complains 687 * about service problems. For now, invalidate cached 688 * routing information. If the route was created dynamically 689 * (by a redirect), time to try a default gateway again. 690 */ 691 void 692 in_losing(inp) 693 struct inpcb *inp; 694 { 695 struct rtentry *rt; 696 struct rt_addrinfo info; 697 698 if (inp->inp_af != AF_INET) 699 return; 700 701 if ((rt = inp->inp_route.ro_rt)) { 702 inp->inp_route.ro_rt = 0; 703 bzero((caddr_t)&info, sizeof(info)); 704 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 705 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 706 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 707 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 708 if (rt->rt_flags & RTF_DYNAMIC) 709 (void) rtrequest(RTM_DELETE, rt_key(rt), 710 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 711 (struct rtentry **)0); 712 else 713 /* 714 * A new route can be allocated 715 * the next time output is attempted. 716 */ 717 rtfree(rt); 718 } 719 } 720 721 /* 722 * After a routing change, flush old routing 723 * and allocate a (hopefully) better one. 724 */ 725 void 726 in_rtchange(inp, errno) 727 struct inpcb *inp; 728 int errno; 729 { 730 731 if (inp->inp_af != AF_INET) 732 return; 733 734 if (inp->inp_route.ro_rt) { 735 rtfree(inp->inp_route.ro_rt); 736 inp->inp_route.ro_rt = 0; 737 /* 738 * A new route can be allocated the next time 739 * output is attempted. 740 */ 741 } 742 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 743 } 744 745 struct inpcb * 746 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 747 struct inpcbtable *table; 748 struct in_addr laddr; 749 u_int lport_arg; 750 int lookup_wildcard; 751 { 752 struct inpcbhead *head; 753 struct inpcb_hdr *inph; 754 struct inpcb *inp, *match = 0; 755 int matchwild = 3, wildcard; 756 u_int16_t lport = lport_arg; 757 758 head = INPCBHASH_PORT(table, lport); 759 LIST_FOREACH(inph, head, inph_lhash) { 760 inp = (struct inpcb *)inph; 761 if (inp->inp_af != AF_INET) 762 continue; 763 764 if (inp->inp_lport != lport) 765 continue; 766 wildcard = 0; 767 if (!in_nullhost(inp->inp_faddr)) 768 wildcard++; 769 if (in_nullhost(inp->inp_laddr)) { 770 if (!in_nullhost(laddr)) 771 wildcard++; 772 } else { 773 if (in_nullhost(laddr)) 774 wildcard++; 775 else { 776 if (!in_hosteq(inp->inp_laddr, laddr)) 777 continue; 778 } 779 } 780 if (wildcard && !lookup_wildcard) 781 continue; 782 if (wildcard < matchwild) { 783 match = inp; 784 matchwild = wildcard; 785 if (matchwild == 0) 786 break; 787 } 788 } 789 return (match); 790 } 791 792 #ifdef DIAGNOSTIC 793 int in_pcbnotifymiss = 0; 794 #endif 795 796 struct inpcb * 797 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 798 struct inpcbtable *table; 799 struct in_addr faddr, laddr; 800 u_int fport_arg, lport_arg; 801 { 802 struct inpcbhead *head; 803 struct inpcb_hdr *inph; 804 struct inpcb *inp; 805 u_int16_t fport = fport_arg, lport = lport_arg; 806 807 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 808 LIST_FOREACH(inph, head, inph_hash) { 809 inp = (struct inpcb *)inph; 810 if (inp->inp_af != AF_INET) 811 continue; 812 813 if (in_hosteq(inp->inp_faddr, faddr) && 814 inp->inp_fport == fport && 815 inp->inp_lport == lport && 816 in_hosteq(inp->inp_laddr, laddr)) 817 goto out; 818 } 819 #ifdef DIAGNOSTIC 820 if (in_pcbnotifymiss) { 821 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 822 ntohl(faddr.s_addr), ntohs(fport), 823 ntohl(laddr.s_addr), ntohs(lport)); 824 } 825 #endif 826 return (0); 827 828 out: 829 /* Move this PCB to the head of hash chain. */ 830 inph = &inp->inp_head; 831 if (inph != LIST_FIRST(head)) { 832 LIST_REMOVE(inph, inph_hash); 833 LIST_INSERT_HEAD(head, inph, inph_hash); 834 } 835 return (inp); 836 } 837 838 struct inpcb * 839 in_pcblookup_bind(table, laddr, lport_arg) 840 struct inpcbtable *table; 841 struct in_addr laddr; 842 u_int lport_arg; 843 { 844 struct inpcbhead *head; 845 struct inpcb_hdr *inph; 846 struct inpcb *inp; 847 u_int16_t lport = lport_arg; 848 849 head = INPCBHASH_BIND(table, laddr, lport); 850 LIST_FOREACH(inph, head, inph_hash) { 851 inp = (struct inpcb *)inph; 852 if (inp->inp_af != AF_INET) 853 continue; 854 855 if (inp->inp_lport == lport && 856 in_hosteq(inp->inp_laddr, laddr)) 857 goto out; 858 } 859 head = INPCBHASH_BIND(table, zeroin_addr, lport); 860 LIST_FOREACH(inph, head, inph_hash) { 861 inp = (struct inpcb *)inph; 862 if (inp->inp_af != AF_INET) 863 continue; 864 865 if (inp->inp_lport == lport && 866 in_hosteq(inp->inp_laddr, zeroin_addr)) 867 goto out; 868 } 869 #ifdef DIAGNOSTIC 870 if (in_pcbnotifymiss) { 871 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 872 ntohl(laddr.s_addr), ntohs(lport)); 873 } 874 #endif 875 return (0); 876 877 out: 878 /* Move this PCB to the head of hash chain. */ 879 inph = &inp->inp_head; 880 if (inph != LIST_FIRST(head)) { 881 LIST_REMOVE(inph, inph_hash); 882 LIST_INSERT_HEAD(head, inph, inph_hash); 883 } 884 return (inp); 885 } 886 887 void 888 in_pcbstate(inp, state) 889 struct inpcb *inp; 890 int state; 891 { 892 893 if (inp->inp_af != AF_INET) 894 return; 895 896 if (inp->inp_state > INP_ATTACHED) 897 LIST_REMOVE(&inp->inp_head, inph_hash); 898 899 switch (state) { 900 case INP_BOUND: 901 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 902 inp->inp_laddr, inp->inp_lport), &inp->inp_head, 903 inph_hash); 904 break; 905 case INP_CONNECTED: 906 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 907 inp->inp_faddr, inp->inp_fport, 908 inp->inp_laddr, inp->inp_lport), &inp->inp_head, 909 inph_hash); 910 break; 911 } 912 913 inp->inp_state = state; 914 } 915 916 struct rtentry * 917 in_pcbrtentry(inp) 918 struct inpcb *inp; 919 { 920 struct route *ro; 921 922 if (inp->inp_af != AF_INET) 923 return (NULL); 924 925 ro = &inp->inp_route; 926 927 if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || 928 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, inp->inp_faddr))) { 929 RTFREE(ro->ro_rt); 930 ro->ro_rt = (struct rtentry *)NULL; 931 } 932 if (ro->ro_rt == (struct rtentry *)NULL && 933 !in_nullhost(inp->inp_faddr)) { 934 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 935 ro->ro_dst.sa_family = AF_INET; 936 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 937 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 938 rtalloc(ro); 939 } 940 return (ro->ro_rt); 941 } 942 943 struct sockaddr_in * 944 in_selectsrc(sin, ro, soopts, mopts, errorp) 945 struct sockaddr_in *sin; 946 struct route *ro; 947 int soopts; 948 struct ip_moptions *mopts; 949 int *errorp; 950 { 951 struct in_ifaddr *ia; 952 953 ia = (struct in_ifaddr *)0; 954 /* 955 * If route is known or can be allocated now, 956 * our src addr is taken from the i/f, else punt. 957 * Note that we should check the address family of the cached 958 * destination, in case of sharing the cache with IPv6. 959 */ 960 if (ro->ro_rt && 961 (ro->ro_dst.sa_family != AF_INET || 962 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 963 soopts & SO_DONTROUTE)) { 964 RTFREE(ro->ro_rt); 965 ro->ro_rt = (struct rtentry *)0; 966 } 967 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 968 (ro->ro_rt == (struct rtentry *)0 || 969 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 970 /* No route yet, so try to acquire one */ 971 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 972 ro->ro_dst.sa_family = AF_INET; 973 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 974 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 975 rtalloc(ro); 976 } 977 /* 978 * If we found a route, use the address 979 * corresponding to the outgoing interface 980 * unless it is the loopback (in case a route 981 * to our address on another net goes to loopback). 982 * 983 * XXX Is this still true? Do we care? 984 */ 985 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 986 ia = ifatoia(ro->ro_rt->rt_ifa); 987 if (ia == NULL) { 988 u_int16_t fport = sin->sin_port; 989 990 sin->sin_port = 0; 991 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 992 sin->sin_port = fport; 993 if (ia == 0) { 994 /* Find 1st non-loopback AF_INET address */ 995 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { 996 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 997 break; 998 } 999 } 1000 if (ia == NULL) { 1001 *errorp = EADDRNOTAVAIL; 1002 return NULL; 1003 } 1004 } 1005 /* 1006 * If the destination address is multicast and an outgoing 1007 * interface has been set as a multicast option, use the 1008 * address of that interface as our source address. 1009 */ 1010 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 1011 struct ip_moptions *imo; 1012 struct ifnet *ifp; 1013 1014 imo = mopts; 1015 if (imo->imo_multicast_ifp != NULL) { 1016 ifp = imo->imo_multicast_ifp; 1017 IFP_TO_IA(ifp, ia); /* XXX */ 1018 if (ia == 0) { 1019 *errorp = EADDRNOTAVAIL; 1020 return NULL; 1021 } 1022 } 1023 } 1024 return satosin(&ia->ia_addr); 1025 } 1026
Indexes created Sun Sep 21 20:09:37 GMT 2025