in_pcb.c revision 1.87
1 /* $NetBSD: in_pcb.c,v 1.87 2003/08/15 03:42:01 jonathan 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 1.87 2003/08/15 03:42:01 jonathan Exp $"); 102 103 #include "opt_ipsec.h" 104 105 #include <sys/param.h> 106 #include <sys/systm.h> 107 #include <sys/malloc.h> 108 #include <sys/mbuf.h> 109 #include <sys/protosw.h> 110 #include <sys/socket.h> 111 #include <sys/socketvar.h> 112 #include <sys/ioctl.h> 113 #include <sys/errno.h> 114 #include <sys/time.h> 115 #include <sys/pool.h> 116 #include <sys/proc.h> 117 118 #include <net/if.h> 119 #include <net/route.h> 120 121 #include <netinet/in.h> 122 #include <netinet/in_systm.h> 123 #include <netinet/ip.h> 124 #include <netinet/in_pcb.h> 125 #include <netinet/in_var.h> 126 #include <netinet/ip_var.h> 127 128 #ifdef IPSEC 129 #include <netinet6/ipsec.h> 130 #include <netkey/key.h> 131 #elif FAST_IPSEC 132 #include <netipsec/ipsec.h> 133 #include <netipsec/key.h> 134 #endif /* IPSEC */ 135 136 struct in_addr zeroin_addr; 137 138 #define INPCBHASH_BIND(table, laddr, lport) \ 139 &(table)->inpt_bindhashtbl[ \ 140 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 141 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 142 &(table)->inpt_connecthashtbl[ \ 143 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 144 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 145 146 struct inpcb * 147 in_pcblookup_port __P((struct inpcbtable *, 148 struct in_addr, u_int, int)); 149 150 int anonportmin = IPPORT_ANONMIN; 151 int anonportmax = IPPORT_ANONMAX; 152 int lowportmin = IPPORT_RESERVEDMIN; 153 int lowportmax = IPPORT_RESERVEDMAX; 154 155 struct pool inpcb_pool; 156 157 void 158 in_pcbinit(table, bindhashsize, connecthashsize) 159 struct inpcbtable *table; 160 int bindhashsize, connecthashsize; 161 { 162 static int inpcb_pool_initialized; 163 164 if (inpcb_pool_initialized == 0) { 165 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 166 "inpcbpl", NULL); 167 inpcb_pool_initialized = 1; 168 } 169 170 CIRCLEQ_INIT(&table->inpt_queue); 171 table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 172 M_WAITOK, &table->inpt_bindhash); 173 table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, 174 M_PCB, M_WAITOK, &table->inpt_connecthash); 175 table->inpt_lastlow = IPPORT_RESERVEDMAX; 176 table->inpt_lastport = (u_int16_t)anonportmax; 177 } 178 179 int 180 in_pcballoc(so, v) 181 struct socket *so; 182 void *v; 183 { 184 struct inpcbtable *table = v; 185 struct inpcb *inp; 186 int s; 187 #if defined(IPSEC) || defined(FAST_IPSEC) 188 int error; 189 #endif 190 191 inp = pool_get(&inpcb_pool, PR_NOWAIT); 192 if (inp == NULL) 193 return (ENOBUFS); 194 bzero((caddr_t)inp, sizeof(*inp)); 195 inp->inp_table = table; 196 inp->inp_socket = so; 197 inp->inp_errormtu = -1; 198 #if defined(IPSEC) || defined(FAST_IPSEC) 199 error = ipsec_init_pcbpolicy(so, &inp->inp_sp); 200 if (error != 0) { 201 pool_put(&inpcb_pool, inp); 202 return error; 203 } 204 #endif 205 so->so_pcb = inp; 206 s = splnet(); 207 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 208 in_pcbstate(inp, INP_ATTACHED); 209 splx(s); 210 return (0); 211 } 212 213 int 214 in_pcbbind(v, nam, p) 215 void *v; 216 struct mbuf *nam; 217 struct proc *p; 218 { 219 struct in_ifaddr *ia = NULL; 220 struct inpcb *inp = v; 221 struct socket *so = inp->inp_socket; 222 struct inpcbtable *table = inp->inp_table; 223 struct sockaddr_in *sin; 224 u_int16_t lport = 0; 225 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 226 227 if (TAILQ_FIRST(&in_ifaddr) == 0) 228 return (EADDRNOTAVAIL); 229 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 230 return (EINVAL); 231 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 232 wild = 1; 233 if (nam == 0) 234 goto noname; 235 sin = mtod(nam, struct sockaddr_in *); 236 if (nam->m_len != sizeof (*sin)) 237 return (EINVAL); 238 if (sin->sin_family != AF_INET) 239 return (EAFNOSUPPORT); 240 lport = sin->sin_port; 241 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 242 /* 243 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 244 * allow complete duplication of binding if 245 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 246 * and a multicast address is bound on both 247 * new and duplicated sockets. 248 */ 249 if (so->so_options & SO_REUSEADDR) 250 reuseport = SO_REUSEADDR|SO_REUSEPORT; 251 } else if (!in_nullhost(sin->sin_addr)) { 252 sin->sin_port = 0; /* yech... */ 253 INADDR_TO_IA(sin->sin_addr, ia); 254 /* check for broadcast addresses */ 255 if (ia == NULL) 256 ia = ifatoia(ifa_ifwithaddr(sintosa(sin))); 257 if (ia == NULL) 258 return (EADDRNOTAVAIL); 259 } 260 if (lport) { 261 struct inpcb *t; 262 #ifndef IPNOPRIVPORTS 263 /* GROSS */ 264 if (ntohs(lport) < IPPORT_RESERVED && 265 (p == 0 || suser(p->p_ucred, &p->p_acflag))) 266 return (EACCES); 267 #endif 268 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 269 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 270 /* 271 * XXX: investigate ramifications of loosening this 272 * restriction so that as long as both ports have 273 * SO_REUSEPORT allow the bind 274 */ 275 if (t && 276 (!in_nullhost(sin->sin_addr) || 277 !in_nullhost(t->inp_laddr) || 278 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 279 && (so->so_uid != t->inp_socket->so_uid)) { 280 return (EADDRINUSE); 281 } 282 } 283 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 284 if (t && (reuseport & t->inp_socket->so_options) == 0) 285 return (EADDRINUSE); 286 } 287 if (!in_nullhost(inp->inp_laddr)) { 288 KASSERT(inp->inp_ia != NULL); 289 LIST_REMOVE(inp, inp_ialink); 290 IFAFREE(&inp->inp_ia->ia_ifa); 291 inp->inp_ia = NULL; 292 } 293 inp->inp_laddr = sin->sin_addr; 294 if (ia != NULL) { 295 inp->inp_ia = ia; 296 LIST_INSERT_HEAD(&ia->ia_inpcbs, inp, inp_ialink); 297 IFAREF(&ia->ia_ifa); 298 } 299 300 301 noname: 302 if (lport == 0) { 303 int cnt; 304 u_int16_t min, max; 305 u_int16_t *lastport; 306 307 if (inp->inp_flags & INP_LOWPORT) { 308 #ifndef IPNOPRIVPORTS 309 if (p == 0 || suser(p->p_ucred, &p->p_acflag)) 310 return (EACCES); 311 #endif 312 min = lowportmin; 313 max = lowportmax; 314 lastport = &table->inpt_lastlow; 315 } else { 316 min = anonportmin; 317 max = anonportmax; 318 lastport = &table->inpt_lastport; 319 } 320 if (min > max) { /* sanity check */ 321 u_int16_t swp; 322 323 swp = min; 324 min = max; 325 max = swp; 326 } 327 328 lport = *lastport - 1; 329 for (cnt = max - min + 1; cnt; cnt--, lport--) { 330 if (lport < min || lport > max) 331 lport = max; 332 if (!in_pcblookup_port(table, inp->inp_laddr, 333 htons(lport), 1)) 334 goto found; 335 } 336 if (!in_nullhost(inp->inp_laddr)) { 337 if (inp->inp_ia != NULL) { 338 LIST_REMOVE(inp, inp_ialink); 339 IFAFREE(&inp->inp_ia->ia_ifa); 340 inp->inp_ia = NULL; 341 } 342 inp->inp_laddr.s_addr = INADDR_ANY; 343 } 344 return (EAGAIN); 345 found: 346 inp->inp_flags |= INP_ANONPORT; 347 *lastport = lport; 348 lport = htons(lport); 349 } 350 inp->inp_lport = lport; 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(v, nam) 363 void *v; 364 struct mbuf *nam; 365 { 366 struct inpcb *inp = v; 367 struct in_ifaddr *ia = NULL; 368 struct sockaddr_in *ifaddr = NULL; 369 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 370 int error; 371 372 if (nam->m_len != sizeof (*sin)) 373 return (EINVAL); 374 if (sin->sin_family != AF_INET) 375 return (EAFNOSUPPORT); 376 if (sin->sin_port == 0) 377 return (EADDRNOTAVAIL); 378 if (TAILQ_FIRST(&in_ifaddr) != 0) { 379 /* 380 * If the destination address is INADDR_ANY, 381 * use any local address (likely loopback). 382 * If the supplied address is INADDR_BROADCAST, 383 * use the broadcast address of an interface 384 * which supports broadcast. (loopback does not) 385 */ 386 387 if (in_nullhost(sin->sin_addr)) { 388 sin->sin_addr = 389 TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr; 390 } else if (sin->sin_addr.s_addr == INADDR_BROADCAST) { 391 TAILQ_FOREACH(ia, &in_ifaddr, ia_list) { 392 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 393 sin->sin_addr = 394 ia->ia_broadaddr.sin_addr; 395 break; 396 } 397 } 398 } 399 } 400 /* 401 * If we haven't bound which network number to use as ours, 402 * we will use the number of the outgoing interface. 403 * This depends on having done a routing lookup, which 404 * we will probably have to do anyway, so we might 405 * as well do it now. On the other hand if we are 406 * sending to multiple destinations we may have already 407 * done the lookup, so see if we can use the route 408 * from before. In any case, we only 409 * chose a port number once, even if sending to multiple 410 * destinations. 411 */ 412 if (in_nullhost(inp->inp_laddr)) { 413 int error; 414 ifaddr = in_selectsrc(sin, &inp->inp_route, 415 inp->inp_socket->so_options, inp->inp_moptions, &error); 416 if (ifaddr == NULL) { 417 if (error == 0) 418 error = EADDRNOTAVAIL; 419 return error; 420 } 421 INADDR_TO_IA(ifaddr->sin_addr, ia); 422 if (ia == NULL) 423 return (EADDRNOTAVAIL); 424 } 425 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 426 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 427 inp->inp_lport) != 0) 428 return (EADDRINUSE); 429 if (in_nullhost(inp->inp_laddr)) { 430 if (inp->inp_lport == 0) { 431 error = in_pcbbind(inp, (struct mbuf *)0, 432 (struct proc *)0); 433 /* 434 * This used to ignore the return value 435 * completely, but we need to check for 436 * ephemeral port shortage. 437 * XXX Should we check for other errors, too? 438 */ 439 if (error == EAGAIN) 440 return (error); 441 } 442 KASSERT(inp->inp_ia == NULL); 443 inp->inp_laddr = ia->ia_addr.sin_addr; 444 inp->inp_ia = ia; 445 LIST_INSERT_HEAD(&ia->ia_inpcbs, inp, inp_ialink); 446 IFAREF(&ia->ia_ifa); 447 inp->inp_laddr = ifaddr->sin_addr; 448 } 449 inp->inp_faddr = sin->sin_addr; 450 inp->inp_fport = sin->sin_port; 451 in_pcbstate(inp, INP_CONNECTED); 452 #if defined(IPSEC) /*|| defined(FAST_IPSEC)*/ /*XXX*/ 453 if (inp->inp_socket->so_type == SOCK_STREAM) 454 ipsec_pcbconn(inp->inp_sp); 455 #endif 456 return (0); 457 } 458 459 void 460 in_pcbdisconnect(v) 461 void *v; 462 { 463 struct inpcb *inp = v; 464 465 inp->inp_faddr = zeroin_addr; 466 inp->inp_fport = 0; 467 in_pcbstate(inp, INP_BOUND); 468 if (inp->inp_socket->so_state & SS_NOFDREF) 469 in_pcbdetach(inp); 470 #if defined(IPSEC) /*|| defined(FAST_IPSEC)*/ /*XXX*/ 471 ipsec_pcbdisconn(inp->inp_sp); 472 #endif 473 } 474 475 void 476 in_pcbdetach(v) 477 void *v; 478 { 479 struct inpcb *inp = v; 480 struct socket *so = inp->inp_socket; 481 int s; 482 483 #if defined(IPSEC) || defined(FAST_IPSEC) 484 ipsec4_delete_pcbpolicy(inp); 485 #endif /*IPSEC*/ 486 so->so_pcb = 0; 487 sofree(so); 488 if (inp->inp_options) 489 (void)m_free(inp->inp_options); 490 if (inp->inp_route.ro_rt) 491 rtfree(inp->inp_route.ro_rt); 492 ip_freemoptions(inp->inp_moptions); 493 if (inp->inp_ia != NULL) { 494 LIST_REMOVE(inp, inp_ialink); 495 IFAFREE(&inp->inp_ia->ia_ifa); 496 inp->inp_ia = NULL; 497 } 498 s = splnet(); 499 in_pcbstate(inp, INP_ATTACHED); 500 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 501 splx(s); 502 pool_put(&inpcb_pool, inp); 503 } 504 505 void 506 in_setsockaddr(inp, nam) 507 struct inpcb *inp; 508 struct mbuf *nam; 509 { 510 struct sockaddr_in *sin; 511 512 nam->m_len = sizeof (*sin); 513 sin = mtod(nam, struct sockaddr_in *); 514 bzero((caddr_t)sin, sizeof (*sin)); 515 sin->sin_family = AF_INET; 516 sin->sin_len = sizeof(*sin); 517 sin->sin_port = inp->inp_lport; 518 sin->sin_addr = inp->inp_laddr; 519 } 520 521 void 522 in_setpeeraddr(inp, nam) 523 struct inpcb *inp; 524 struct mbuf *nam; 525 { 526 struct sockaddr_in *sin; 527 528 nam->m_len = sizeof (*sin); 529 sin = mtod(nam, struct sockaddr_in *); 530 bzero((caddr_t)sin, sizeof (*sin)); 531 sin->sin_family = AF_INET; 532 sin->sin_len = sizeof(*sin); 533 sin->sin_port = inp->inp_fport; 534 sin->sin_addr = inp->inp_faddr; 535 } 536 537 /* 538 * Pass some notification to all connections of a protocol 539 * associated with address dst. The local address and/or port numbers 540 * may be specified to limit the search. The "usual action" will be 541 * taken, depending on the ctlinput cmd. The caller must filter any 542 * cmds that are uninteresting (e.g., no error in the map). 543 * Call the protocol specific routine (if any) to report 544 * any errors for each matching socket. 545 * 546 * Must be called at splsoftnet. 547 */ 548 int 549 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 550 struct inpcbtable *table; 551 struct in_addr faddr, laddr; 552 u_int fport_arg, lport_arg; 553 int errno; 554 void (*notify) __P((struct inpcb *, int)); 555 { 556 struct inpcbhead *head; 557 struct inpcb *inp, *ninp; 558 u_int16_t fport = fport_arg, lport = lport_arg; 559 int nmatch; 560 561 if (in_nullhost(faddr) || notify == 0) 562 return (0); 563 564 nmatch = 0; 565 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 566 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 567 ninp = LIST_NEXT(inp, inp_hash); 568 if (in_hosteq(inp->inp_faddr, faddr) && 569 inp->inp_fport == fport && 570 inp->inp_lport == lport && 571 in_hosteq(inp->inp_laddr, laddr)) { 572 (*notify)(inp, errno); 573 nmatch++; 574 } 575 } 576 return (nmatch); 577 } 578 579 void 580 in_pcbnotifyall(table, faddr, errno, notify) 581 struct inpcbtable *table; 582 struct in_addr faddr; 583 int errno; 584 void (*notify) __P((struct inpcb *, int)); 585 { 586 struct inpcb *inp, *ninp; 587 588 if (in_nullhost(faddr) || notify == 0) 589 return; 590 591 for (inp = CIRCLEQ_FIRST(&table->inpt_queue); 592 inp != (void *)&table->inpt_queue; 593 inp = ninp) { 594 ninp = CIRCLEQ_NEXT(inp, inp_queue); 595 if (in_hosteq(inp->inp_faddr, faddr)) 596 (*notify)(inp, errno); 597 } 598 } 599 600 void 601 in_pcbpurgeif0(table, ifp) 602 struct inpcbtable *table; 603 struct ifnet *ifp; 604 { 605 struct inpcb *inp, *ninp; 606 struct ip_moptions *imo; 607 int i, gap; 608 609 for (inp = CIRCLEQ_FIRST(&table->inpt_queue); 610 inp != (void *)&table->inpt_queue; 611 inp = ninp) { 612 ninp = CIRCLEQ_NEXT(inp, inp_queue); 613 imo = inp->inp_moptions; 614 if (imo != NULL) { 615 /* 616 * Unselect the outgoing interface if it is being 617 * detached. 618 */ 619 if (imo->imo_multicast_ifp == ifp) 620 imo->imo_multicast_ifp = NULL; 621 622 /* 623 * Drop multicast group membership if we joined 624 * through the interface being detached. 625 */ 626 for (i = 0, gap = 0; i < imo->imo_num_memberships; 627 i++) { 628 if (imo->imo_membership[i]->inm_ifp == ifp) { 629 in_delmulti(imo->imo_membership[i]); 630 gap++; 631 } else if (gap != 0) 632 imo->imo_membership[i - gap] = 633 imo->imo_membership[i]; 634 } 635 imo->imo_num_memberships -= gap; 636 } 637 } 638 } 639 640 void 641 in_pcbpurgeif(table, ifp) 642 struct inpcbtable *table; 643 struct ifnet *ifp; 644 { 645 struct inpcb *inp, *ninp; 646 647 for (inp = CIRCLEQ_FIRST(&table->inpt_queue); 648 inp != (void *)&table->inpt_queue; 649 inp = ninp) { 650 ninp = CIRCLEQ_NEXT(inp, inp_queue); 651 if (inp->inp_route.ro_rt != NULL && 652 inp->inp_route.ro_rt->rt_ifp == ifp) 653 in_rtchange(inp, 0); 654 } 655 } 656 657 /* 658 * Check for alternatives when higher level complains 659 * about service problems. For now, invalidate cached 660 * routing information. If the route was created dynamically 661 * (by a redirect), time to try a default gateway again. 662 */ 663 void 664 in_losing(inp) 665 struct inpcb *inp; 666 { 667 struct rtentry *rt; 668 struct rt_addrinfo info; 669 670 if ((rt = inp->inp_route.ro_rt)) { 671 inp->inp_route.ro_rt = 0; 672 bzero((caddr_t)&info, sizeof(info)); 673 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 674 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 675 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 676 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 677 if (rt->rt_flags & RTF_DYNAMIC) 678 (void) rtrequest(RTM_DELETE, rt_key(rt), 679 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 680 (struct rtentry **)0); 681 else 682 /* 683 * A new route can be allocated 684 * the next time output is attempted. 685 */ 686 rtfree(rt); 687 } 688 } 689 690 /* 691 * After a routing change, flush old routing 692 * and allocate a (hopefully) better one. 693 */ 694 void 695 in_rtchange(inp, errno) 696 struct inpcb *inp; 697 int errno; 698 { 699 700 if (inp->inp_route.ro_rt) { 701 rtfree(inp->inp_route.ro_rt); 702 inp->inp_route.ro_rt = 0; 703 /* 704 * A new route can be allocated the next time 705 * output is attempted. 706 */ 707 } 708 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 709 } 710 711 struct inpcb * 712 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 713 struct inpcbtable *table; 714 struct in_addr laddr; 715 u_int lport_arg; 716 int lookup_wildcard; 717 { 718 struct inpcb *inp, *match = 0; 719 int matchwild = 3, wildcard; 720 u_int16_t lport = lport_arg; 721 722 CIRCLEQ_FOREACH(inp, &table->inpt_queue, inp_queue) { 723 if (inp->inp_lport != lport) 724 continue; 725 wildcard = 0; 726 if (!in_nullhost(inp->inp_faddr)) 727 wildcard++; 728 if (in_nullhost(inp->inp_laddr)) { 729 if (!in_nullhost(laddr)) 730 wildcard++; 731 } else { 732 if (in_nullhost(laddr)) 733 wildcard++; 734 else { 735 if (!in_hosteq(inp->inp_laddr, laddr)) 736 continue; 737 } 738 } 739 if (wildcard && !lookup_wildcard) 740 continue; 741 if (wildcard < matchwild) { 742 match = inp; 743 matchwild = wildcard; 744 if (matchwild == 0) 745 break; 746 } 747 } 748 return (match); 749 } 750 751 #ifdef DIAGNOSTIC 752 int in_pcbnotifymiss = 0; 753 #endif 754 755 struct inpcb * 756 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 757 struct inpcbtable *table; 758 struct in_addr faddr, laddr; 759 u_int fport_arg, lport_arg; 760 { 761 struct inpcbhead *head; 762 struct inpcb *inp; 763 u_int16_t fport = fport_arg, lport = lport_arg; 764 765 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 766 LIST_FOREACH(inp, head, inp_hash) { 767 if (in_hosteq(inp->inp_faddr, faddr) && 768 inp->inp_fport == fport && 769 inp->inp_lport == lport && 770 in_hosteq(inp->inp_laddr, laddr)) 771 goto out; 772 } 773 #ifdef DIAGNOSTIC 774 if (in_pcbnotifymiss) { 775 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 776 ntohl(faddr.s_addr), ntohs(fport), 777 ntohl(laddr.s_addr), ntohs(lport)); 778 } 779 #endif 780 return (0); 781 782 out: 783 /* Move this PCB to the head of hash chain. */ 784 if (inp != LIST_FIRST(head)) { 785 LIST_REMOVE(inp, inp_hash); 786 LIST_INSERT_HEAD(head, inp, inp_hash); 787 } 788 return (inp); 789 } 790 791 struct inpcb * 792 in_pcblookup_bind(table, laddr, lport_arg) 793 struct inpcbtable *table; 794 struct in_addr laddr; 795 u_int lport_arg; 796 { 797 struct inpcbhead *head; 798 struct inpcb *inp; 799 u_int16_t lport = lport_arg; 800 801 head = INPCBHASH_BIND(table, laddr, lport); 802 LIST_FOREACH(inp, head, inp_hash) { 803 if (inp->inp_lport == lport && 804 in_hosteq(inp->inp_laddr, laddr)) 805 goto out; 806 } 807 head = INPCBHASH_BIND(table, zeroin_addr, lport); 808 LIST_FOREACH(inp, head, inp_hash) { 809 if (inp->inp_lport == lport && 810 in_hosteq(inp->inp_laddr, zeroin_addr)) 811 goto out; 812 } 813 #ifdef DIAGNOSTIC 814 if (in_pcbnotifymiss) { 815 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 816 ntohl(laddr.s_addr), ntohs(lport)); 817 } 818 #endif 819 return (0); 820 821 out: 822 /* Move this PCB to the head of hash chain. */ 823 if (inp != LIST_FIRST(head)) { 824 LIST_REMOVE(inp, inp_hash); 825 LIST_INSERT_HEAD(head, inp, inp_hash); 826 } 827 return (inp); 828 } 829 830 void 831 in_pcbstate(inp, state) 832 struct inpcb *inp; 833 int state; 834 { 835 836 if (inp->inp_state > INP_ATTACHED) 837 LIST_REMOVE(inp, inp_hash); 838 839 switch (state) { 840 case INP_BOUND: 841 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 842 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 843 break; 844 case INP_CONNECTED: 845 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 846 inp->inp_faddr, inp->inp_fport, 847 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 848 break; 849 } 850 851 inp->inp_state = state; 852 } 853 854 struct rtentry * 855 in_pcbrtentry(inp) 856 struct inpcb *inp; 857 { 858 struct route *ro; 859 860 ro = &inp->inp_route; 861 862 if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || 863 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, inp->inp_faddr))) { 864 RTFREE(ro->ro_rt); 865 ro->ro_rt = (struct rtentry *)NULL; 866 } 867 if (ro->ro_rt == (struct rtentry *)NULL && 868 !in_nullhost(inp->inp_faddr)) { 869 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 870 ro->ro_dst.sa_family = AF_INET; 871 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 872 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 873 rtalloc(ro); 874 } 875 return (ro->ro_rt); 876 } 877 878 struct sockaddr_in * 879 in_selectsrc(sin, ro, soopts, mopts, errorp) 880 struct sockaddr_in *sin; 881 struct route *ro; 882 int soopts; 883 struct ip_moptions *mopts; 884 int *errorp; 885 { 886 struct in_ifaddr *ia; 887 888 ia = (struct in_ifaddr *)0; 889 /* 890 * If route is known or can be allocated now, 891 * our src addr is taken from the i/f, else punt. 892 * Note that we should check the address family of the cached 893 * destination, in case of sharing the cache with IPv6. 894 */ 895 if (ro->ro_rt && 896 (ro->ro_dst.sa_family != AF_INET || 897 !in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 898 soopts & SO_DONTROUTE)) { 899 RTFREE(ro->ro_rt); 900 ro->ro_rt = (struct rtentry *)0; 901 } 902 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 903 (ro->ro_rt == (struct rtentry *)0 || 904 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 905 /* No route yet, so try to acquire one */ 906 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 907 ro->ro_dst.sa_family = AF_INET; 908 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 909 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 910 rtalloc(ro); 911 } 912 /* 913 * If we found a route, use the address 914 * corresponding to the outgoing interface 915 * unless it is the loopback (in case a route 916 * to our address on another net goes to loopback). 917 * 918 * XXX Is this still true? Do we care? 919 */ 920 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 921 ia = ifatoia(ro->ro_rt->rt_ifa); 922 if (ia == NULL) { 923 u_int16_t fport = sin->sin_port; 924 925 sin->sin_port = 0; 926 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 927 sin->sin_port = fport; 928 if (ia == 0) { 929 /* Find 1st non-loopback AF_INET address */ 930 TAILQ_FOREACH(ia, &in_ifaddr, ia_list) { 931 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 932 break; 933 } 934 } 935 if (ia == NULL) { 936 *errorp = EADDRNOTAVAIL; 937 return NULL; 938 } 939 } 940 /* 941 * If the destination address is multicast and an outgoing 942 * interface has been set as a multicast option, use the 943 * address of that interface as our source address. 944 */ 945 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 946 struct ip_moptions *imo; 947 struct ifnet *ifp; 948 949 imo = mopts; 950 if (imo->imo_multicast_ifp != NULL) { 951 ifp = imo->imo_multicast_ifp; 952 IFP_TO_IA(ifp, ia); /* XXX */ 953 if (ia == 0) { 954 *errorp = EADDRNOTAVAIL; 955 return NULL; 956 } 957 } 958 } 959 return satosin(&ia->ia_addr); 960 } 961
Indexes created Wed Sep 24 05:09:52 GMT 2025