in_pcb.c revision 1.70
1 /* $NetBSD: in_pcb.c,v 1.70 2001/07/25 23:28:02 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. 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 #endif /* IPSEC */ 133 134 struct in_addr zeroin_addr; 135 136 #define INPCBHASH_BIND(table, laddr, lport) \ 137 &(table)->inpt_bindhashtbl[ \ 138 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 139 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 140 &(table)->inpt_connecthashtbl[ \ 141 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 142 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 143 144 struct inpcb * 145 in_pcblookup_port __P((struct inpcbtable *, 146 struct in_addr, u_int, int)); 147 148 int anonportmin = IPPORT_ANONMIN; 149 int anonportmax = IPPORT_ANONMAX; 150 int lowportmin = IPPORT_RESERVEDMIN; 151 int lowportmax = IPPORT_RESERVEDMAX; 152 153 struct pool inpcb_pool; 154 155 void 156 in_pcbinit(table, bindhashsize, connecthashsize) 157 struct inpcbtable *table; 158 int bindhashsize, connecthashsize; 159 { 160 static int inpcb_pool_initialized; 161 162 if (inpcb_pool_initialized == 0) { 163 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 164 "inpcbpl", 0, NULL, NULL, M_PCB); 165 inpcb_pool_initialized = 1; 166 } 167 168 CIRCLEQ_INIT(&table->inpt_queue); 169 table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, 170 M_WAITOK, &table->inpt_bindhash); 171 table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, 172 M_PCB, M_WAITOK, &table->inpt_connecthash); 173 table->inpt_lastlow = IPPORT_RESERVEDMAX; 174 table->inpt_lastport = (u_int16_t)anonportmax; 175 } 176 177 int 178 in_pcballoc(so, v) 179 struct socket *so; 180 void *v; 181 { 182 struct inpcbtable *table = v; 183 struct inpcb *inp; 184 int s; 185 #ifdef IPSEC 186 int error; 187 #endif 188 189 inp = pool_get(&inpcb_pool, PR_NOWAIT); 190 if (inp == NULL) 191 return (ENOBUFS); 192 bzero((caddr_t)inp, sizeof(*inp)); 193 inp->inp_table = table; 194 inp->inp_socket = so; 195 inp->inp_errormtu = -1; 196 #ifdef IPSEC 197 error = ipsec_init_policy(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_queue); 206 in_pcbstate(inp, INP_ATTACHED); 207 splx(s); 208 return (0); 209 } 210 211 int 212 in_pcbbind(v, nam, p) 213 void *v; 214 struct mbuf *nam; 215 struct proc *p; 216 { 217 struct inpcb *inp = v; 218 struct socket *so = inp->inp_socket; 219 struct inpcbtable *table = inp->inp_table; 220 struct sockaddr_in *sin; 221 u_int16_t lport = 0; 222 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 223 #ifndef IPNOPRIVPORTS 224 int error; 225 #endif 226 227 if (in_ifaddr.tqh_first == 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 #ifdef notdef 239 /* 240 * We should check the family, but old programs 241 * incorrectly fail to initialize it. 242 */ 243 if (sin->sin_family != AF_INET) 244 return (EAFNOSUPPORT); 245 #endif 246 lport = sin->sin_port; 247 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 248 /* 249 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 250 * allow complete duplication of binding if 251 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 252 * and a multicast address is bound on both 253 * new and duplicated sockets. 254 */ 255 if (so->so_options & SO_REUSEADDR) 256 reuseport = SO_REUSEADDR|SO_REUSEPORT; 257 } else if (!in_nullhost(sin->sin_addr)) { 258 sin->sin_port = 0; /* yech... */ 259 if (ifa_ifwithaddr(sintosa(sin)) == 0) 260 return (EADDRNOTAVAIL); 261 } 262 if (lport) { 263 struct inpcb *t; 264 #ifndef IPNOPRIVPORTS 265 /* GROSS */ 266 if (ntohs(lport) < IPPORT_RESERVED && 267 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 268 return (EACCES); 269 #endif 270 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 271 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 272 /* 273 * XXX: investigate ramifications of loosening this 274 * restriction so that as long as both ports have 275 * SO_REUSEPORT allow the bind 276 */ 277 if (t && 278 (!in_nullhost(sin->sin_addr) || 279 !in_nullhost(t->inp_laddr) || 280 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 281 && (so->so_uid != t->inp_socket->so_uid)) { 282 return (EADDRINUSE); 283 } 284 } 285 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 286 if (t && (reuseport & t->inp_socket->so_options) == 0) 287 return (EADDRINUSE); 288 } 289 inp->inp_laddr = sin->sin_addr; 290 291 noname: 292 if (lport == 0) { 293 int cnt; 294 u_int16_t min, max; 295 u_int16_t *lastport; 296 297 if (inp->inp_flags & INP_LOWPORT) { 298 #ifndef IPNOPRIVPORTS 299 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 300 return (EACCES); 301 #endif 302 min = lowportmin; 303 max = lowportmax; 304 lastport = &table->inpt_lastlow; 305 } else { 306 min = anonportmin; 307 max = anonportmax; 308 lastport = &table->inpt_lastport; 309 } 310 if (min > max) { /* sanity check */ 311 u_int16_t swp; 312 313 swp = min; 314 min = max; 315 max = swp; 316 } 317 318 lport = *lastport - 1; 319 for (cnt = max - min + 1; cnt; cnt--, lport--) { 320 if (lport < min || lport > max) 321 lport = max; 322 if (!in_pcblookup_port(table, inp->inp_laddr, 323 htons(lport), 1)) 324 goto found; 325 } 326 if (!in_nullhost(inp->inp_laddr)) 327 inp->inp_laddr.s_addr = INADDR_ANY; 328 return (EAGAIN); 329 found: 330 inp->inp_flags |= INP_ANONPORT; 331 *lastport = lport; 332 lport = htons(lport); 333 } 334 inp->inp_lport = lport; 335 in_pcbstate(inp, INP_BOUND); 336 return (0); 337 } 338 339 /* 340 * Connect from a socket to a specified address. 341 * Both address and port must be specified in argument sin. 342 * If don't have a local address for this socket yet, 343 * then pick one. 344 */ 345 int 346 in_pcbconnect(v, nam) 347 void *v; 348 struct mbuf *nam; 349 { 350 struct inpcb *inp = v; 351 struct in_ifaddr *ia; 352 struct sockaddr_in *ifaddr = NULL; 353 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 354 int error; 355 356 if (nam->m_len != sizeof (*sin)) 357 return (EINVAL); 358 if (sin->sin_family != AF_INET) 359 return (EAFNOSUPPORT); 360 if (sin->sin_port == 0) 361 return (EADDRNOTAVAIL); 362 if (in_ifaddr.tqh_first != 0) { 363 /* 364 * If the destination address is INADDR_ANY, 365 * use any local address (likely loopback). 366 * If the supplied address is INADDR_BROADCAST, 367 * use the broadcast address of an interface 368 * which supports broadcast. (loopback does not) 369 */ 370 371 if (in_nullhost(sin->sin_addr)) 372 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 373 else if (sin->sin_addr.s_addr == INADDR_BROADCAST) 374 for (ia = in_ifaddr.tqh_first; ia != NULL; 375 ia = ia->ia_list.tqe_next) 376 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 377 sin->sin_addr = ia->ia_broadaddr.sin_addr; 378 break; 379 } 380 } 381 /* 382 * If we haven't bound which network number to use as ours, 383 * we will use the number of the outgoing interface. 384 * This depends on having done a routing lookup, which 385 * we will probably have to do anyway, so we might 386 * as well do it now. On the other hand if we are 387 * sending to multiple destinations we may have already 388 * done the lookup, so see if we can use the route 389 * from before. In any case, we only 390 * chose a port number once, even if sending to multiple 391 * destinations. 392 */ 393 if (in_nullhost(inp->inp_laddr)) { 394 #if 0 395 struct route *ro; 396 397 ia = (struct in_ifaddr *)0; 398 /* 399 * If route is known or can be allocated now, 400 * our src addr is taken from the i/f, else punt. 401 */ 402 ro = &inp->inp_route; 403 if (ro->ro_rt && 404 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 405 sin->sin_addr) || 406 inp->inp_socket->so_options & SO_DONTROUTE)) { 407 RTFREE(ro->ro_rt); 408 ro->ro_rt = (struct rtentry *)0; 409 } 410 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 411 (ro->ro_rt == (struct rtentry *)0 || 412 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 413 /* No route yet, so try to acquire one */ 414 ro->ro_dst.sa_family = AF_INET; 415 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 416 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 417 rtalloc(ro); 418 } 419 /* 420 * If we found a route, use the address 421 * corresponding to the outgoing interface 422 * unless it is the loopback (in case a route 423 * to our address on another net goes to loopback). 424 * 425 * XXX Is this still true? Do we care? 426 */ 427 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 428 ia = ifatoia(ro->ro_rt->rt_ifa); 429 if (ia == NULL) { 430 u_int16_t fport = sin->sin_port; 431 432 sin->sin_port = 0; 433 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 434 sin->sin_port = fport; 435 if (ia == 0) { 436 /* Find 1st non-loopback AF_INET address */ 437 for (ia = in_ifaddr.tqh_first ; ia != NULL; 438 ia = ia->ia_list.tqe_next) { 439 if ((ia->ia_ifp->if_flags & 440 IFF_LOOPBACK) == 0) 441 break; 442 } 443 } 444 if (ia == NULL) 445 return (EADDRNOTAVAIL); 446 } 447 /* 448 * If the destination address is multicast and an outgoing 449 * interface has been set as a multicast option, use the 450 * address of that interface as our source address. 451 */ 452 if (IN_MULTICAST(sin->sin_addr.s_addr) && 453 inp->inp_moptions != NULL) { 454 struct ip_moptions *imo; 455 struct ifnet *ifp; 456 457 imo = inp->inp_moptions; 458 if (imo->imo_multicast_ifp != NULL) { 459 ifp = imo->imo_multicast_ifp; 460 IFP_TO_IA(ifp, ia); /* XXX */ 461 if (ia == 0) 462 return (EADDRNOTAVAIL); 463 } 464 } 465 ifaddr = satosin(&ia->ia_addr); 466 #else 467 int error; 468 ifaddr = in_selectsrc(sin, &inp->inp_route, 469 inp->inp_socket->so_options, inp->inp_moptions, &error); 470 if (ifaddr == NULL) { 471 if (error == 0) 472 error = EADDRNOTAVAIL; 473 return error; 474 } 475 #endif 476 } 477 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 478 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 479 inp->inp_lport) != 0) 480 return (EADDRINUSE); 481 if (in_nullhost(inp->inp_laddr)) { 482 if (inp->inp_lport == 0) { 483 error = in_pcbbind(inp, (struct mbuf *)0, 484 (struct proc *)0); 485 /* 486 * This used to ignore the return value 487 * completely, but we need to check for 488 * ephemeral port shortage. 489 * XXX Should we check for other errors, too? 490 */ 491 if (error == EAGAIN) 492 return (error); 493 } 494 inp->inp_laddr = ifaddr->sin_addr; 495 } 496 inp->inp_faddr = sin->sin_addr; 497 inp->inp_fport = sin->sin_port; 498 in_pcbstate(inp, INP_CONNECTED); 499 return (0); 500 } 501 502 void 503 in_pcbdisconnect(v) 504 void *v; 505 { 506 struct inpcb *inp = v; 507 508 inp->inp_faddr = zeroin_addr; 509 inp->inp_fport = 0; 510 in_pcbstate(inp, INP_BOUND); 511 if (inp->inp_socket->so_state & SS_NOFDREF) 512 in_pcbdetach(inp); 513 } 514 515 void 516 in_pcbdetach(v) 517 void *v; 518 { 519 struct inpcb *inp = v; 520 struct socket *so = inp->inp_socket; 521 int s; 522 523 #ifdef IPSEC 524 ipsec4_delete_pcbpolicy(inp); 525 #endif /*IPSEC*/ 526 so->so_pcb = 0; 527 sofree(so); 528 if (inp->inp_options) 529 (void)m_free(inp->inp_options); 530 if (inp->inp_route.ro_rt) 531 rtfree(inp->inp_route.ro_rt); 532 ip_freemoptions(inp->inp_moptions); 533 s = splnet(); 534 in_pcbstate(inp, INP_ATTACHED); 535 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 536 splx(s); 537 pool_put(&inpcb_pool, inp); 538 } 539 540 void 541 in_setsockaddr(inp, nam) 542 struct inpcb *inp; 543 struct mbuf *nam; 544 { 545 struct sockaddr_in *sin; 546 547 nam->m_len = sizeof (*sin); 548 sin = mtod(nam, struct sockaddr_in *); 549 bzero((caddr_t)sin, sizeof (*sin)); 550 sin->sin_family = AF_INET; 551 sin->sin_len = sizeof(*sin); 552 sin->sin_port = inp->inp_lport; 553 sin->sin_addr = inp->inp_laddr; 554 } 555 556 void 557 in_setpeeraddr(inp, nam) 558 struct inpcb *inp; 559 struct mbuf *nam; 560 { 561 struct sockaddr_in *sin; 562 563 nam->m_len = sizeof (*sin); 564 sin = mtod(nam, struct sockaddr_in *); 565 bzero((caddr_t)sin, sizeof (*sin)); 566 sin->sin_family = AF_INET; 567 sin->sin_len = sizeof(*sin); 568 sin->sin_port = inp->inp_fport; 569 sin->sin_addr = inp->inp_faddr; 570 } 571 572 /* 573 * Pass some notification to all connections of a protocol 574 * associated with address dst. The local address and/or port numbers 575 * may be specified to limit the search. The "usual action" will be 576 * taken, depending on the ctlinput cmd. The caller must filter any 577 * cmds that are uninteresting (e.g., no error in the map). 578 * Call the protocol specific routine (if any) to report 579 * any errors for each matching socket. 580 * 581 * Must be called at splsoftnet. 582 */ 583 int 584 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 585 struct inpcbtable *table; 586 struct in_addr faddr, laddr; 587 u_int fport_arg, lport_arg; 588 int errno; 589 void (*notify) __P((struct inpcb *, int)); 590 { 591 struct inpcbhead *head; 592 struct inpcb *inp, *ninp; 593 u_int16_t fport = fport_arg, lport = lport_arg; 594 int nmatch; 595 596 if (in_nullhost(faddr) || notify == 0) 597 return (0); 598 599 nmatch = 0; 600 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 601 for (inp = head->lh_first; inp != NULL; inp = ninp) { 602 ninp = inp->inp_hash.le_next; 603 if (in_hosteq(inp->inp_faddr, faddr) && 604 inp->inp_fport == fport && 605 inp->inp_lport == lport && 606 in_hosteq(inp->inp_laddr, laddr)) { 607 (*notify)(inp, errno); 608 nmatch++; 609 } 610 } 611 return (nmatch); 612 } 613 614 void 615 in_pcbnotifyall(table, faddr, errno, notify) 616 struct inpcbtable *table; 617 struct in_addr faddr; 618 int errno; 619 void (*notify) __P((struct inpcb *, int)); 620 { 621 struct inpcb *inp, *ninp; 622 623 if (in_nullhost(faddr) || notify == 0) 624 return; 625 626 for (inp = table->inpt_queue.cqh_first; 627 inp != (struct inpcb *)&table->inpt_queue; 628 inp = ninp) { 629 ninp = inp->inp_queue.cqe_next; 630 if (in_hosteq(inp->inp_faddr, faddr)) 631 (*notify)(inp, errno); 632 } 633 } 634 635 void 636 in_pcbpurgeif0(table, ifp) 637 struct inpcbtable *table; 638 struct ifnet *ifp; 639 { 640 struct inpcb *inp, *ninp; 641 struct ip_moptions *imo; 642 int i, gap; 643 644 for (inp = table->inpt_queue.cqh_first; 645 inp != (struct inpcb *)&table->inpt_queue; 646 inp = ninp) { 647 ninp = inp->inp_queue.cqe_next; 648 imo = inp->inp_moptions; 649 if (imo != NULL) { 650 /* 651 * Unselect the outgoing interface if it is being 652 * detached. 653 */ 654 if (imo->imo_multicast_ifp == ifp) 655 imo->imo_multicast_ifp = NULL; 656 657 /* 658 * Drop multicast group membership if we joined 659 * through the interface being detached. 660 */ 661 for (i = 0, gap = 0; i < imo->imo_num_memberships; 662 i++) { 663 if (imo->imo_membership[i]->inm_ifp == ifp) { 664 in_delmulti(imo->imo_membership[i]); 665 gap++; 666 } else if (gap != 0) 667 imo->imo_membership[i - gap] = 668 imo->imo_membership[i]; 669 } 670 imo->imo_num_memberships -= gap; 671 } 672 } 673 } 674 675 void 676 in_pcbpurgeif(table, ifp) 677 struct inpcbtable *table; 678 struct ifnet *ifp; 679 { 680 struct inpcb *inp, *ninp; 681 682 for (inp = table->inpt_queue.cqh_first; 683 inp != (struct inpcb *)&table->inpt_queue; 684 inp = ninp) { 685 ninp = inp->inp_queue.cqe_next; 686 if (inp->inp_route.ro_rt != NULL && 687 inp->inp_route.ro_rt->rt_ifp == ifp) 688 in_rtchange(inp, 0); 689 } 690 } 691 692 /* 693 * Check for alternatives when higher level complains 694 * about service problems. For now, invalidate cached 695 * routing information. If the route was created dynamically 696 * (by a redirect), time to try a default gateway again. 697 */ 698 void 699 in_losing(inp) 700 struct inpcb *inp; 701 { 702 struct rtentry *rt; 703 struct rt_addrinfo info; 704 705 if ((rt = inp->inp_route.ro_rt)) { 706 inp->inp_route.ro_rt = 0; 707 bzero((caddr_t)&info, sizeof(info)); 708 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 709 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 710 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 711 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 712 if (rt->rt_flags & RTF_DYNAMIC) 713 (void) rtrequest(RTM_DELETE, rt_key(rt), 714 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 715 (struct rtentry **)0); 716 else 717 /* 718 * A new route can be allocated 719 * the next time output is attempted. 720 */ 721 rtfree(rt); 722 } 723 } 724 725 /* 726 * After a routing change, flush old routing 727 * and allocate a (hopefully) better one. 728 */ 729 void 730 in_rtchange(inp, errno) 731 struct inpcb *inp; 732 int errno; 733 { 734 735 if (inp->inp_route.ro_rt) { 736 rtfree(inp->inp_route.ro_rt); 737 inp->inp_route.ro_rt = 0; 738 /* 739 * A new route can be allocated the next time 740 * output is attempted. 741 */ 742 } 743 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 744 } 745 746 struct inpcb * 747 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 748 struct inpcbtable *table; 749 struct in_addr laddr; 750 u_int lport_arg; 751 int lookup_wildcard; 752 { 753 struct inpcb *inp, *match = 0; 754 int matchwild = 3, wildcard; 755 u_int16_t lport = lport_arg; 756 757 for (inp = table->inpt_queue.cqh_first; 758 inp != (struct inpcb *)&table->inpt_queue; 759 inp = inp->inp_queue.cqe_next) { 760 if (inp->inp_lport != lport) 761 continue; 762 wildcard = 0; 763 if (!in_nullhost(inp->inp_faddr)) 764 wildcard++; 765 if (in_nullhost(inp->inp_laddr)) { 766 if (!in_nullhost(laddr)) 767 wildcard++; 768 } else { 769 if (in_nullhost(laddr)) 770 wildcard++; 771 else { 772 if (!in_hosteq(inp->inp_laddr, laddr)) 773 continue; 774 } 775 } 776 if (wildcard && !lookup_wildcard) 777 continue; 778 if (wildcard < matchwild) { 779 match = inp; 780 matchwild = wildcard; 781 if (matchwild == 0) 782 break; 783 } 784 } 785 return (match); 786 } 787 788 #ifdef DIAGNOSTIC 789 int in_pcbnotifymiss = 0; 790 #endif 791 792 struct inpcb * 793 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 794 struct inpcbtable *table; 795 struct in_addr faddr, laddr; 796 u_int fport_arg, lport_arg; 797 { 798 struct inpcbhead *head; 799 struct inpcb *inp; 800 u_int16_t fport = fport_arg, lport = lport_arg; 801 802 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 803 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 804 if (in_hosteq(inp->inp_faddr, faddr) && 805 inp->inp_fport == fport && 806 inp->inp_lport == lport && 807 in_hosteq(inp->inp_laddr, laddr)) 808 goto out; 809 } 810 #ifdef DIAGNOSTIC 811 if (in_pcbnotifymiss) { 812 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 813 ntohl(faddr.s_addr), ntohs(fport), 814 ntohl(laddr.s_addr), ntohs(lport)); 815 } 816 #endif 817 return (0); 818 819 out: 820 /* Move this PCB to the head of hash chain. */ 821 if (inp != head->lh_first) { 822 LIST_REMOVE(inp, inp_hash); 823 LIST_INSERT_HEAD(head, inp, inp_hash); 824 } 825 return (inp); 826 } 827 828 struct inpcb * 829 in_pcblookup_bind(table, laddr, lport_arg) 830 struct inpcbtable *table; 831 struct in_addr laddr; 832 u_int lport_arg; 833 { 834 struct inpcbhead *head; 835 struct inpcb *inp; 836 u_int16_t lport = lport_arg; 837 838 head = INPCBHASH_BIND(table, laddr, lport); 839 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 840 if (inp->inp_lport == lport && 841 in_hosteq(inp->inp_laddr, laddr)) 842 goto out; 843 } 844 head = INPCBHASH_BIND(table, zeroin_addr, lport); 845 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 846 if (inp->inp_lport == lport && 847 in_hosteq(inp->inp_laddr, zeroin_addr)) 848 goto out; 849 } 850 #ifdef DIAGNOSTIC 851 if (in_pcbnotifymiss) { 852 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 853 ntohl(laddr.s_addr), ntohs(lport)); 854 } 855 #endif 856 return (0); 857 858 out: 859 /* Move this PCB to the head of hash chain. */ 860 if (inp != head->lh_first) { 861 LIST_REMOVE(inp, inp_hash); 862 LIST_INSERT_HEAD(head, inp, inp_hash); 863 } 864 return (inp); 865 } 866 867 void 868 in_pcbstate(inp, state) 869 struct inpcb *inp; 870 int state; 871 { 872 873 if (inp->inp_state > INP_ATTACHED) 874 LIST_REMOVE(inp, inp_hash); 875 876 switch (state) { 877 case INP_BOUND: 878 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 879 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 880 break; 881 case INP_CONNECTED: 882 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 883 inp->inp_faddr, inp->inp_fport, 884 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 885 break; 886 } 887 888 inp->inp_state = state; 889 } 890 891 struct rtentry * 892 in_pcbrtentry(inp) 893 struct inpcb *inp; 894 { 895 struct route *ro; 896 897 ro = &inp->inp_route; 898 899 if (ro->ro_rt == NULL) { 900 /* 901 * No route yet, so try to acquire one. 902 */ 903 if (!in_nullhost(inp->inp_faddr)) { 904 ro->ro_dst.sa_family = AF_INET; 905 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 906 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 907 rtalloc(ro); 908 } 909 } 910 return (ro->ro_rt); 911 } 912 913 struct sockaddr_in * 914 in_selectsrc(sin, ro, soopts, mopts, errorp) 915 struct sockaddr_in *sin; 916 struct route *ro; 917 int soopts; 918 struct ip_moptions *mopts; 919 int *errorp; 920 { 921 struct in_ifaddr *ia; 922 923 ia = (struct in_ifaddr *)0; 924 /* 925 * If route is known or can be allocated now, 926 * our src addr is taken from the i/f, else punt. 927 */ 928 if (ro->ro_rt && 929 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 930 soopts & SO_DONTROUTE)) { 931 RTFREE(ro->ro_rt); 932 ro->ro_rt = (struct rtentry *)0; 933 } 934 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 935 (ro->ro_rt == (struct rtentry *)0 || 936 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 937 /* No route yet, so try to acquire one */ 938 ro->ro_dst.sa_family = AF_INET; 939 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 940 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 941 rtalloc(ro); 942 } 943 /* 944 * If we found a route, use the address 945 * corresponding to the outgoing interface 946 * unless it is the loopback (in case a route 947 * to our address on another net goes to loopback). 948 * 949 * XXX Is this still true? Do we care? 950 */ 951 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 952 ia = ifatoia(ro->ro_rt->rt_ifa); 953 if (ia == NULL) { 954 u_int16_t fport = sin->sin_port; 955 956 sin->sin_port = 0; 957 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 958 sin->sin_port = fport; 959 if (ia == 0) { 960 /* Find 1st non-loopback AF_INET address */ 961 for (ia = in_ifaddr.tqh_first; 962 ia != NULL; 963 ia = ia->ia_list.tqe_next) { 964 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 965 break; 966 } 967 } 968 if (ia == NULL) { 969 *errorp = EADDRNOTAVAIL; 970 return NULL; 971 } 972 } 973 /* 974 * If the destination address is multicast and an outgoing 975 * interface has been set as a multicast option, use the 976 * address of that interface as our source address. 977 */ 978 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 979 struct ip_moptions *imo; 980 struct ifnet *ifp; 981 982 imo = mopts; 983 if (imo->imo_multicast_ifp != NULL) { 984 ifp = imo->imo_multicast_ifp; 985 IFP_TO_IA(ifp, ia); /* XXX */ 986 if (ia == 0) { 987 *errorp = EADDRNOTAVAIL; 988 return NULL; 989 } 990 } 991 } 992 return satosin(&ia->ia_addr); 993 } 994
Indexes created Sun Sep 21 14:09:52 GMT 2025