in_pcb.c revision 1.65.4.1
1 /* $NetBSD: in_pcb.c,v 1.65.4.1 2000/08/26 16:38:32 tron 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. All advertising materials mentioning features or use of this software 82 * must display the following acknowledgement: 83 * This product includes software developed by the University of 84 * California, Berkeley and its contributors. 85 * 4. Neither the name of the University nor the names of its contributors 86 * may be used to endorse or promote products derived from this software 87 * without specific prior written permission. 88 * 89 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 90 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 91 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 92 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 93 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 94 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 95 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 96 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 97 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 98 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 99 * SUCH DAMAGE. 100 * 101 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 102 */ 103 104 #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 IPSEC 130 #include <netinet6/ipsec.h> 131 #include <netkey/key.h> 132 #include <netkey/key_debug.h> 133 #endif /* IPSEC */ 134 135 struct in_addr zeroin_addr; 136 137 #define INPCBHASH_BIND(table, laddr, lport) \ 138 &(table)->inpt_bindhashtbl[ \ 139 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 140 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 141 &(table)->inpt_connecthashtbl[ \ 142 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 143 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 144 145 struct inpcb * 146 in_pcblookup_port __P((struct inpcbtable *, 147 struct in_addr, u_int, int)); 148 149 int anonportmin = IPPORT_ANONMIN; 150 int anonportmax = IPPORT_ANONMAX; 151 int lowportmin = IPPORT_RESERVEDMIN; 152 int lowportmax = IPPORT_RESERVEDMAX; 153 154 struct pool inpcb_pool; 155 156 void 157 in_pcbinit(table, bindhashsize, connecthashsize) 158 struct inpcbtable *table; 159 int bindhashsize, connecthashsize; 160 { 161 static int inpcb_pool_initialized; 162 163 if (inpcb_pool_initialized == 0) { 164 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 165 "inpcbpl", 0, NULL, NULL, M_PCB); 166 inpcb_pool_initialized = 1; 167 } 168 169 CIRCLEQ_INIT(&table->inpt_queue); 170 table->inpt_bindhashtbl = 171 hashinit(bindhashsize, M_PCB, M_WAITOK, &table->inpt_bindhash); 172 table->inpt_connecthashtbl = 173 hashinit(connecthashsize, 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(so, v) 180 struct socket *so; 181 void *v; 182 { 183 struct inpcbtable *table = v; 184 struct inpcb *inp; 185 int s; 186 187 inp = pool_get(&inpcb_pool, PR_NOWAIT); 188 if (inp == NULL) 189 return (ENOBUFS); 190 bzero((caddr_t)inp, sizeof(*inp)); 191 inp->inp_table = table; 192 inp->inp_socket = so; 193 inp->inp_errormtu = -1; 194 so->so_pcb = inp; 195 s = splnet(); 196 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 197 in_pcbstate(inp, INP_ATTACHED); 198 splx(s); 199 return (0); 200 } 201 202 int 203 in_pcbbind(v, nam, p) 204 void *v; 205 struct mbuf *nam; 206 struct proc *p; 207 { 208 struct inpcb *inp = v; 209 struct socket *so = inp->inp_socket; 210 struct inpcbtable *table = inp->inp_table; 211 struct sockaddr_in *sin; 212 u_int16_t lport = 0; 213 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 214 #ifndef IPNOPRIVPORTS 215 int error; 216 #endif 217 218 if (in_ifaddr.tqh_first == 0) 219 return (EADDRNOTAVAIL); 220 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 221 return (EINVAL); 222 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 223 wild = 1; 224 if (nam == 0) 225 goto noname; 226 sin = mtod(nam, struct sockaddr_in *); 227 if (nam->m_len != sizeof (*sin)) 228 return (EINVAL); 229 #ifdef notdef 230 /* 231 * We should check the family, but old programs 232 * incorrectly fail to initialize it. 233 */ 234 if (sin->sin_family != AF_INET) 235 return (EAFNOSUPPORT); 236 #endif 237 lport = sin->sin_port; 238 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 239 /* 240 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 241 * allow complete duplication of binding if 242 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 243 * and a multicast address is bound on both 244 * new and duplicated sockets. 245 */ 246 if (so->so_options & SO_REUSEADDR) 247 reuseport = SO_REUSEADDR|SO_REUSEPORT; 248 } else if (!in_nullhost(sin->sin_addr)) { 249 sin->sin_port = 0; /* yech... */ 250 if (ifa_ifwithaddr(sintosa(sin)) == 0) 251 return (EADDRNOTAVAIL); 252 } 253 if (lport) { 254 struct inpcb *t; 255 #ifndef IPNOPRIVPORTS 256 /* GROSS */ 257 if (ntohs(lport) < IPPORT_RESERVED && 258 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 259 return (EACCES); 260 #endif 261 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 262 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 263 /* 264 * XXX: investigate ramifications of loosening this 265 * restriction so that as long as both ports have 266 * SO_REUSEPORT allow the bind 267 */ 268 if (t && 269 (!in_nullhost(sin->sin_addr) || 270 !in_nullhost(t->inp_laddr) || 271 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 272 && (so->so_uid != t->inp_socket->so_uid)) { 273 return (EADDRINUSE); 274 } 275 } 276 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 277 if (t && (reuseport & t->inp_socket->so_options) == 0) 278 return (EADDRINUSE); 279 } 280 inp->inp_laddr = sin->sin_addr; 281 282 noname: 283 if (lport == 0) { 284 int cnt; 285 u_int16_t min, max; 286 u_int16_t *lastport; 287 288 if (inp->inp_flags & INP_LOWPORT) { 289 #ifndef IPNOPRIVPORTS 290 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 291 return (EACCES); 292 #endif 293 min = lowportmin; 294 max = lowportmax; 295 lastport = &table->inpt_lastlow; 296 } else { 297 min = anonportmin; 298 max = anonportmax; 299 lastport = &table->inpt_lastport; 300 } 301 if (min > max) { /* sanity check */ 302 u_int16_t swp; 303 304 swp = min; 305 min = max; 306 max = swp; 307 } 308 309 lport = *lastport - 1; 310 for (cnt = max - min + 1; cnt; cnt--, lport--) { 311 if (lport < min || lport > max) 312 lport = max; 313 if (!in_pcblookup_port(table, inp->inp_laddr, 314 htons(lport), 1)) 315 goto found; 316 } 317 if (!in_nullhost(inp->inp_laddr)) 318 inp->inp_laddr.s_addr = INADDR_ANY; 319 return (EAGAIN); 320 found: 321 inp->inp_flags |= INP_ANONPORT; 322 *lastport = lport; 323 lport = htons(lport); 324 } 325 inp->inp_lport = lport; 326 in_pcbstate(inp, INP_BOUND); 327 return (0); 328 } 329 330 /* 331 * Connect from a socket to a specified address. 332 * Both address and port must be specified in argument sin. 333 * If don't have a local address for this socket yet, 334 * then pick one. 335 */ 336 int 337 in_pcbconnect(v, nam) 338 void *v; 339 struct mbuf *nam; 340 { 341 struct inpcb *inp = v; 342 struct in_ifaddr *ia; 343 struct sockaddr_in *ifaddr = NULL; 344 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 345 int error; 346 347 if (nam->m_len != sizeof (*sin)) 348 return (EINVAL); 349 if (sin->sin_family != AF_INET) 350 return (EAFNOSUPPORT); 351 if (sin->sin_port == 0) 352 return (EADDRNOTAVAIL); 353 if (in_ifaddr.tqh_first != 0) { 354 /* 355 * If the destination address is INADDR_ANY, 356 * use any local address (likely loopback). 357 * If the supplied address is INADDR_BROADCAST, 358 * use the broadcast address of an interface 359 * which supports broadcast. (loopback does not) 360 */ 361 362 if (in_nullhost(sin->sin_addr)) 363 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 364 else if (sin->sin_addr.s_addr == INADDR_BROADCAST) 365 for (ia = in_ifaddr.tqh_first; ia != NULL; 366 ia = ia->ia_list.tqe_next) 367 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 368 sin->sin_addr = ia->ia_broadaddr.sin_addr; 369 break; 370 } 371 } 372 /* 373 * If we haven't bound which network number to use as ours, 374 * we will use the number of the outgoing interface. 375 * This depends on having done a routing lookup, which 376 * we will probably have to do anyway, so we might 377 * as well do it now. On the other hand if we are 378 * sending to multiple destinations we may have already 379 * done the lookup, so see if we can use the route 380 * from before. In any case, we only 381 * chose a port number once, even if sending to multiple 382 * destinations. 383 */ 384 if (in_nullhost(inp->inp_laddr)) { 385 #if 0 386 struct route *ro; 387 388 ia = (struct in_ifaddr *)0; 389 /* 390 * If route is known or can be allocated now, 391 * our src addr is taken from the i/f, else punt. 392 */ 393 ro = &inp->inp_route; 394 if (ro->ro_rt && 395 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 396 sin->sin_addr) || 397 inp->inp_socket->so_options & SO_DONTROUTE)) { 398 RTFREE(ro->ro_rt); 399 ro->ro_rt = (struct rtentry *)0; 400 } 401 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 402 (ro->ro_rt == (struct rtentry *)0 || 403 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 404 /* No route yet, so try to acquire one */ 405 ro->ro_dst.sa_family = AF_INET; 406 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 407 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 408 rtalloc(ro); 409 } 410 /* 411 * If we found a route, use the address 412 * corresponding to the outgoing interface 413 * unless it is the loopback (in case a route 414 * to our address on another net goes to loopback). 415 * 416 * XXX Is this still true? Do we care? 417 */ 418 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 419 ia = ifatoia(ro->ro_rt->rt_ifa); 420 if (ia == NULL) { 421 u_int16_t fport = sin->sin_port; 422 423 sin->sin_port = 0; 424 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 425 sin->sin_port = fport; 426 if (ia == 0) { 427 /* Find 1st non-loopback AF_INET address */ 428 for (ia = in_ifaddr.tqh_first ; ia != NULL; 429 ia = ia->ia_list.tqe_next) { 430 if ((ia->ia_ifp->if_flags & 431 IFF_LOOPBACK) == 0) 432 break; 433 } 434 } 435 if (ia == NULL) 436 return (EADDRNOTAVAIL); 437 } 438 /* 439 * If the destination address is multicast and an outgoing 440 * interface has been set as a multicast option, use the 441 * address of that interface as our source address. 442 */ 443 if (IN_MULTICAST(sin->sin_addr.s_addr) && 444 inp->inp_moptions != NULL) { 445 struct ip_moptions *imo; 446 struct ifnet *ifp; 447 448 imo = inp->inp_moptions; 449 if (imo->imo_multicast_ifp != NULL) { 450 ifp = imo->imo_multicast_ifp; 451 IFP_TO_IA(ifp, ia); /* XXX */ 452 if (ia == 0) 453 return (EADDRNOTAVAIL); 454 } 455 } 456 ifaddr = satosin(&ia->ia_addr); 457 #else 458 int error; 459 ifaddr = in_selectsrc(sin, &inp->inp_route, 460 inp->inp_socket->so_options, inp->inp_moptions, &error); 461 if (ifaddr == NULL) { 462 if (error == 0) 463 error = EADDRNOTAVAIL; 464 return error; 465 } 466 #endif 467 } 468 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 469 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 470 inp->inp_lport) != 0) 471 return (EADDRINUSE); 472 if (in_nullhost(inp->inp_laddr)) { 473 if (inp->inp_lport == 0) { 474 error = in_pcbbind(inp, (struct mbuf *)0, 475 (struct proc *)0); 476 /* 477 * This used to ignore the return value 478 * completely, but we need to check for 479 * ephemeral port shortage. 480 * XXX Should we check for other errors, too? 481 */ 482 if (error == EAGAIN) 483 return (error); 484 } 485 inp->inp_laddr = ifaddr->sin_addr; 486 } 487 inp->inp_faddr = sin->sin_addr; 488 inp->inp_fport = sin->sin_port; 489 in_pcbstate(inp, INP_CONNECTED); 490 return (0); 491 } 492 493 void 494 in_pcbdisconnect(v) 495 void *v; 496 { 497 struct inpcb *inp = v; 498 499 inp->inp_faddr = zeroin_addr; 500 inp->inp_fport = 0; 501 in_pcbstate(inp, INP_BOUND); 502 if (inp->inp_socket->so_state & SS_NOFDREF) 503 in_pcbdetach(inp); 504 } 505 506 void 507 in_pcbdetach(v) 508 void *v; 509 { 510 struct inpcb *inp = v; 511 struct socket *so = inp->inp_socket; 512 int s; 513 514 #ifdef IPSEC 515 ipsec4_delete_pcbpolicy(inp); 516 #endif /*IPSEC*/ 517 so->so_pcb = 0; 518 sofree(so); 519 if (inp->inp_options) 520 (void)m_free(inp->inp_options); 521 if (inp->inp_route.ro_rt) 522 rtfree(inp->inp_route.ro_rt); 523 ip_freemoptions(inp->inp_moptions); 524 s = splnet(); 525 in_pcbstate(inp, INP_ATTACHED); 526 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 527 splx(s); 528 pool_put(&inpcb_pool, inp); 529 } 530 531 void 532 in_setsockaddr(inp, nam) 533 struct inpcb *inp; 534 struct mbuf *nam; 535 { 536 struct sockaddr_in *sin; 537 538 nam->m_len = sizeof (*sin); 539 sin = mtod(nam, struct sockaddr_in *); 540 bzero((caddr_t)sin, sizeof (*sin)); 541 sin->sin_family = AF_INET; 542 sin->sin_len = sizeof(*sin); 543 sin->sin_port = inp->inp_lport; 544 sin->sin_addr = inp->inp_laddr; 545 } 546 547 void 548 in_setpeeraddr(inp, nam) 549 struct inpcb *inp; 550 struct mbuf *nam; 551 { 552 struct sockaddr_in *sin; 553 554 nam->m_len = sizeof (*sin); 555 sin = mtod(nam, struct sockaddr_in *); 556 bzero((caddr_t)sin, sizeof (*sin)); 557 sin->sin_family = AF_INET; 558 sin->sin_len = sizeof(*sin); 559 sin->sin_port = inp->inp_fport; 560 sin->sin_addr = inp->inp_faddr; 561 } 562 563 /* 564 * Pass some notification to all connections of a protocol 565 * associated with address dst. The local address and/or port numbers 566 * may be specified to limit the search. The "usual action" will be 567 * taken, depending on the ctlinput cmd. The caller must filter any 568 * cmds that are uninteresting (e.g., no error in the map). 569 * Call the protocol specific routine (if any) to report 570 * any errors for each matching socket. 571 * 572 * Must be called at splsoftnet. 573 */ 574 int 575 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 576 struct inpcbtable *table; 577 struct in_addr faddr, laddr; 578 u_int fport_arg, lport_arg; 579 int errno; 580 void (*notify) __P((struct inpcb *, int)); 581 { 582 struct inpcbhead *head; 583 struct inpcb *inp, *ninp; 584 u_int16_t fport = fport_arg, lport = lport_arg; 585 int nmatch; 586 587 if (in_nullhost(faddr) || notify == 0) 588 return (0); 589 590 nmatch = 0; 591 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 592 for (inp = head->lh_first; inp != NULL; inp = ninp) { 593 ninp = inp->inp_hash.le_next; 594 if (in_hosteq(inp->inp_faddr, faddr) && 595 inp->inp_fport == fport && 596 inp->inp_lport == lport && 597 in_hosteq(inp->inp_laddr, laddr)) { 598 (*notify)(inp, errno); 599 nmatch++; 600 } 601 } 602 return (nmatch); 603 } 604 605 void 606 in_pcbnotifyall(table, faddr, errno, notify) 607 struct inpcbtable *table; 608 struct in_addr faddr; 609 int errno; 610 void (*notify) __P((struct inpcb *, int)); 611 { 612 struct inpcb *inp, *ninp; 613 614 if (in_nullhost(faddr) || notify == 0) 615 return; 616 617 for (inp = table->inpt_queue.cqh_first; 618 inp != (struct inpcb *)&table->inpt_queue; 619 inp = ninp) { 620 ninp = inp->inp_queue.cqe_next; 621 if (in_hosteq(inp->inp_faddr, faddr)) 622 (*notify)(inp, errno); 623 } 624 } 625 626 void 627 in_pcbpurgeif(table, ifp) 628 struct inpcbtable *table; 629 struct ifnet *ifp; 630 { 631 struct inpcb *inp, *ninp; 632 struct ip_moptions *imo; 633 int i, gap; 634 635 for (inp = table->inpt_queue.cqh_first; 636 inp != (struct inpcb *)&table->inpt_queue; 637 inp = ninp) { 638 ninp = inp->inp_queue.cqe_next; 639 if (inp->inp_route.ro_rt != NULL && 640 inp->inp_route.ro_rt->rt_ifp == ifp) 641 in_rtchange(inp, 0); 642 imo = inp->inp_moptions; 643 if (imo != NULL) { 644 /* 645 * Unselect the outgoing interface if it is being 646 * detached. 647 */ 648 if (imo->imo_multicast_ifp == ifp) 649 imo->imo_multicast_ifp = NULL; 650 651 /* 652 * Drop multicast group membership if we joined 653 * through the interface being detached. 654 */ 655 for (i = 0, gap = 0; i < imo->imo_num_memberships; 656 i++) { 657 if (imo->imo_membership[i]->inm_ifp == ifp) { 658 in_delmulti(imo->imo_membership[i]); 659 gap++; 660 } else if (gap != 0) 661 imo->imo_membership[i - gap] = 662 imo->imo_membership[i]; 663 } 664 imo->imo_num_memberships -= gap; 665 } 666 } 667 } 668 669 /* 670 * Check for alternatives when higher level complains 671 * about service problems. For now, invalidate cached 672 * routing information. If the route was created dynamically 673 * (by a redirect), time to try a default gateway again. 674 */ 675 void 676 in_losing(inp) 677 struct inpcb *inp; 678 { 679 struct rtentry *rt; 680 struct rt_addrinfo info; 681 682 if ((rt = inp->inp_route.ro_rt)) { 683 inp->inp_route.ro_rt = 0; 684 bzero((caddr_t)&info, sizeof(info)); 685 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 686 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 687 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 688 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 689 if (rt->rt_flags & RTF_DYNAMIC) 690 (void) rtrequest(RTM_DELETE, rt_key(rt), 691 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 692 (struct rtentry **)0); 693 else 694 /* 695 * A new route can be allocated 696 * the next time output is attempted. 697 */ 698 rtfree(rt); 699 } 700 } 701 702 /* 703 * After a routing change, flush old routing 704 * and allocate a (hopefully) better one. 705 */ 706 void 707 in_rtchange(inp, errno) 708 struct inpcb *inp; 709 int errno; 710 { 711 712 if (inp->inp_route.ro_rt) { 713 rtfree(inp->inp_route.ro_rt); 714 inp->inp_route.ro_rt = 0; 715 /* 716 * A new route can be allocated the next time 717 * output is attempted. 718 */ 719 } 720 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 721 } 722 723 struct inpcb * 724 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 725 struct inpcbtable *table; 726 struct in_addr laddr; 727 u_int lport_arg; 728 int lookup_wildcard; 729 { 730 struct inpcb *inp, *match = 0; 731 int matchwild = 3, wildcard; 732 u_int16_t lport = lport_arg; 733 734 for (inp = table->inpt_queue.cqh_first; 735 inp != (struct inpcb *)&table->inpt_queue; 736 inp = inp->inp_queue.cqe_next) { 737 if (inp->inp_lport != lport) 738 continue; 739 wildcard = 0; 740 if (!in_nullhost(inp->inp_faddr)) 741 wildcard++; 742 if (in_nullhost(inp->inp_laddr)) { 743 if (!in_nullhost(laddr)) 744 wildcard++; 745 } else { 746 if (in_nullhost(laddr)) 747 wildcard++; 748 else { 749 if (!in_hosteq(inp->inp_laddr, laddr)) 750 continue; 751 } 752 } 753 if (wildcard && !lookup_wildcard) 754 continue; 755 if (wildcard < matchwild) { 756 match = inp; 757 matchwild = wildcard; 758 if (matchwild == 0) 759 break; 760 } 761 } 762 return (match); 763 } 764 765 #ifdef DIAGNOSTIC 766 int in_pcbnotifymiss = 0; 767 #endif 768 769 struct inpcb * 770 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 771 struct inpcbtable *table; 772 struct in_addr faddr, laddr; 773 u_int fport_arg, lport_arg; 774 { 775 struct inpcbhead *head; 776 struct inpcb *inp; 777 u_int16_t fport = fport_arg, lport = lport_arg; 778 779 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 780 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 781 if (in_hosteq(inp->inp_faddr, faddr) && 782 inp->inp_fport == fport && 783 inp->inp_lport == lport && 784 in_hosteq(inp->inp_laddr, laddr)) 785 goto out; 786 } 787 #ifdef DIAGNOSTIC 788 if (in_pcbnotifymiss) { 789 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 790 ntohl(faddr.s_addr), ntohs(fport), 791 ntohl(laddr.s_addr), ntohs(lport)); 792 } 793 #endif 794 return (0); 795 796 out: 797 /* Move this PCB to the head of hash chain. */ 798 if (inp != head->lh_first) { 799 LIST_REMOVE(inp, inp_hash); 800 LIST_INSERT_HEAD(head, inp, inp_hash); 801 } 802 return (inp); 803 } 804 805 struct inpcb * 806 in_pcblookup_bind(table, laddr, lport_arg) 807 struct inpcbtable *table; 808 struct in_addr laddr; 809 u_int lport_arg; 810 { 811 struct inpcbhead *head; 812 struct inpcb *inp; 813 u_int16_t lport = lport_arg; 814 815 head = INPCBHASH_BIND(table, laddr, lport); 816 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 817 if (inp->inp_lport == lport && 818 in_hosteq(inp->inp_laddr, laddr)) 819 goto out; 820 } 821 head = INPCBHASH_BIND(table, zeroin_addr, lport); 822 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 823 if (inp->inp_lport == lport && 824 in_hosteq(inp->inp_laddr, zeroin_addr)) 825 goto out; 826 } 827 #ifdef DIAGNOSTIC 828 if (in_pcbnotifymiss) { 829 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 830 ntohl(laddr.s_addr), ntohs(lport)); 831 } 832 #endif 833 return (0); 834 835 out: 836 /* Move this PCB to the head of hash chain. */ 837 if (inp != head->lh_first) { 838 LIST_REMOVE(inp, inp_hash); 839 LIST_INSERT_HEAD(head, inp, inp_hash); 840 } 841 return (inp); 842 } 843 844 void 845 in_pcbstate(inp, state) 846 struct inpcb *inp; 847 int state; 848 { 849 850 if (inp->inp_state > INP_ATTACHED) 851 LIST_REMOVE(inp, inp_hash); 852 853 switch (state) { 854 case INP_BOUND: 855 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 856 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 857 break; 858 case INP_CONNECTED: 859 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 860 inp->inp_faddr, inp->inp_fport, 861 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 862 break; 863 } 864 865 inp->inp_state = state; 866 } 867 868 struct rtentry * 869 in_pcbrtentry(inp) 870 struct inpcb *inp; 871 { 872 struct route *ro; 873 874 ro = &inp->inp_route; 875 876 if (ro->ro_rt == NULL) { 877 /* 878 * No route yet, so try to acquire one. 879 */ 880 if (!in_nullhost(inp->inp_faddr)) { 881 ro->ro_dst.sa_family = AF_INET; 882 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 883 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 884 rtalloc(ro); 885 } 886 } 887 return (ro->ro_rt); 888 } 889 890 struct sockaddr_in * 891 in_selectsrc(sin, ro, soopts, mopts, errorp) 892 struct sockaddr_in *sin; 893 struct route *ro; 894 int soopts; 895 struct ip_moptions *mopts; 896 int *errorp; 897 { 898 struct in_ifaddr *ia; 899 900 ia = (struct in_ifaddr *)0; 901 /* 902 * If route is known or can be allocated now, 903 * our src addr is taken from the i/f, else punt. 904 */ 905 if (ro->ro_rt && 906 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 907 soopts & SO_DONTROUTE)) { 908 RTFREE(ro->ro_rt); 909 ro->ro_rt = (struct rtentry *)0; 910 } 911 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 912 (ro->ro_rt == (struct rtentry *)0 || 913 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 914 /* No route yet, so try to acquire one */ 915 ro->ro_dst.sa_family = AF_INET; 916 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 917 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 918 rtalloc(ro); 919 } 920 /* 921 * If we found a route, use the address 922 * corresponding to the outgoing interface 923 * unless it is the loopback (in case a route 924 * to our address on another net goes to loopback). 925 * 926 * XXX Is this still true? Do we care? 927 */ 928 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 929 ia = ifatoia(ro->ro_rt->rt_ifa); 930 if (ia == NULL) { 931 u_int16_t fport = sin->sin_port; 932 933 sin->sin_port = 0; 934 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 935 sin->sin_port = fport; 936 if (ia == 0) { 937 /* Find 1st non-loopback AF_INET address */ 938 for (ia = in_ifaddr.tqh_first; 939 ia != NULL; 940 ia = ia->ia_list.tqe_next) { 941 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 942 break; 943 } 944 } 945 if (ia == NULL) { 946 *errorp = EADDRNOTAVAIL; 947 return NULL; 948 } 949 } 950 /* 951 * If the destination address is multicast and an outgoing 952 * interface has been set as a multicast option, use the 953 * address of that interface as our source address. 954 */ 955 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 956 struct ip_moptions *imo; 957 struct ifnet *ifp; 958 959 imo = mopts; 960 if (imo->imo_multicast_ifp != NULL) { 961 ifp = imo->imo_multicast_ifp; 962 IFP_TO_IA(ifp, ia); /* XXX */ 963 if (ia == 0) { 964 *errorp = EADDRNOTAVAIL; 965 return NULL; 966 } 967 } 968 } 969 return satosin(&ia->ia_addr); 970 } 971
Indexes created Wed Oct 22 13:09:56 GMT 2025