in_pcb.c revision 1.65
1 /* $NetBSD: in_pcb.c,v 1.65 2000/04/03 03:51:16 enami 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; 151 152 struct pool inpcb_pool; 153 154 void 155 in_pcbinit(table, bindhashsize, connecthashsize) 156 struct inpcbtable *table; 157 int bindhashsize, connecthashsize; 158 { 159 static int inpcb_pool_initialized; 160 161 if (inpcb_pool_initialized == 0) { 162 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 163 "inpcbpl", 0, NULL, NULL, M_PCB); 164 inpcb_pool_initialized = 1; 165 } 166 167 CIRCLEQ_INIT(&table->inpt_queue); 168 table->inpt_bindhashtbl = 169 hashinit(bindhashsize, M_PCB, M_WAITOK, &table->inpt_bindhash); 170 table->inpt_connecthashtbl = 171 hashinit(connecthashsize, M_PCB, M_WAITOK, &table->inpt_connecthash); 172 table->inpt_lastlow = IPPORT_RESERVEDMAX; 173 table->inpt_lastport = (u_int16_t)anonportmax; 174 } 175 176 int 177 in_pcballoc(so, v) 178 struct socket *so; 179 void *v; 180 { 181 struct inpcbtable *table = v; 182 struct inpcb *inp; 183 int s; 184 185 inp = pool_get(&inpcb_pool, PR_NOWAIT); 186 if (inp == NULL) 187 return (ENOBUFS); 188 bzero((caddr_t)inp, sizeof(*inp)); 189 inp->inp_table = table; 190 inp->inp_socket = so; 191 inp->inp_errormtu = -1; 192 so->so_pcb = inp; 193 s = splnet(); 194 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 195 in_pcbstate(inp, INP_ATTACHED); 196 splx(s); 197 return (0); 198 } 199 200 int 201 in_pcbbind(v, nam, p) 202 void *v; 203 struct mbuf *nam; 204 struct proc *p; 205 { 206 struct inpcb *inp = v; 207 struct socket *so = inp->inp_socket; 208 struct inpcbtable *table = inp->inp_table; 209 struct sockaddr_in *sin; 210 u_int16_t lport = 0; 211 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 212 #ifndef IPNOPRIVPORTS 213 int error; 214 #endif 215 216 if (in_ifaddr.tqh_first == 0) 217 return (EADDRNOTAVAIL); 218 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 219 return (EINVAL); 220 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 221 wild = 1; 222 if (nam == 0) 223 goto noname; 224 sin = mtod(nam, struct sockaddr_in *); 225 if (nam->m_len != sizeof (*sin)) 226 return (EINVAL); 227 #ifdef notdef 228 /* 229 * We should check the family, but old programs 230 * incorrectly fail to initialize it. 231 */ 232 if (sin->sin_family != AF_INET) 233 return (EAFNOSUPPORT); 234 #endif 235 lport = sin->sin_port; 236 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 237 /* 238 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 239 * allow complete duplication of binding if 240 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 241 * and a multicast address is bound on both 242 * new and duplicated sockets. 243 */ 244 if (so->so_options & SO_REUSEADDR) 245 reuseport = SO_REUSEADDR|SO_REUSEPORT; 246 } else if (!in_nullhost(sin->sin_addr)) { 247 sin->sin_port = 0; /* yech... */ 248 if (ifa_ifwithaddr(sintosa(sin)) == 0) 249 return (EADDRNOTAVAIL); 250 } 251 if (lport) { 252 struct inpcb *t; 253 #ifndef IPNOPRIVPORTS 254 /* GROSS */ 255 if (ntohs(lport) < IPPORT_RESERVED && 256 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 257 return (EACCES); 258 #endif 259 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 260 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 261 /* 262 * XXX: investigate ramifications of loosening this 263 * restriction so that as long as both ports have 264 * SO_REUSEPORT allow the bind 265 */ 266 if (t && 267 (!in_nullhost(sin->sin_addr) || 268 !in_nullhost(t->inp_laddr) || 269 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 270 && (so->so_uid != t->inp_socket->so_uid)) { 271 return (EADDRINUSE); 272 } 273 } 274 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 275 if (t && (reuseport & t->inp_socket->so_options) == 0) 276 return (EADDRINUSE); 277 } 278 inp->inp_laddr = sin->sin_addr; 279 280 noname: 281 if (lport == 0) { 282 int cnt; 283 u_int16_t min, max; 284 u_int16_t *lastport; 285 286 if (inp->inp_flags & INP_LOWPORT) { 287 #ifndef IPNOPRIVPORTS 288 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 289 return (EACCES); 290 #endif 291 min = IPPORT_RESERVEDMIN; 292 max = IPPORT_RESERVEDMAX; 293 lastport = &table->inpt_lastlow; 294 } else { 295 min = anonportmin; 296 max = anonportmax; 297 lastport = &table->inpt_lastport; 298 } 299 if (min > max) { /* sanity check */ 300 u_int16_t swp; 301 302 swp = min; 303 min = max; 304 max = swp; 305 } 306 307 lport = *lastport - 1; 308 for (cnt = max - min + 1; cnt; cnt--, lport--) { 309 if (lport < min || lport > max) 310 lport = max; 311 if (!in_pcblookup_port(table, inp->inp_laddr, 312 htons(lport), 1)) 313 goto found; 314 } 315 if (!in_nullhost(inp->inp_laddr)) 316 inp->inp_laddr.s_addr = INADDR_ANY; 317 return (EAGAIN); 318 found: 319 inp->inp_flags |= INP_ANONPORT; 320 *lastport = lport; 321 lport = htons(lport); 322 } 323 inp->inp_lport = lport; 324 in_pcbstate(inp, INP_BOUND); 325 return (0); 326 } 327 328 /* 329 * Connect from a socket to a specified address. 330 * Both address and port must be specified in argument sin. 331 * If don't have a local address for this socket yet, 332 * then pick one. 333 */ 334 int 335 in_pcbconnect(v, nam) 336 void *v; 337 struct mbuf *nam; 338 { 339 struct inpcb *inp = v; 340 struct in_ifaddr *ia; 341 struct sockaddr_in *ifaddr = NULL; 342 struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 343 int error; 344 345 if (nam->m_len != sizeof (*sin)) 346 return (EINVAL); 347 if (sin->sin_family != AF_INET) 348 return (EAFNOSUPPORT); 349 if (sin->sin_port == 0) 350 return (EADDRNOTAVAIL); 351 if (in_ifaddr.tqh_first != 0) { 352 /* 353 * If the destination address is INADDR_ANY, 354 * use any local address (likely loopback). 355 * If the supplied address is INADDR_BROADCAST, 356 * use the broadcast address of an interface 357 * which supports broadcast. (loopback does not) 358 */ 359 360 if (in_nullhost(sin->sin_addr)) 361 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 362 else if (sin->sin_addr.s_addr == INADDR_BROADCAST) 363 for (ia = in_ifaddr.tqh_first; ia != NULL; 364 ia = ia->ia_list.tqe_next) 365 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 366 sin->sin_addr = ia->ia_broadaddr.sin_addr; 367 break; 368 } 369 } 370 /* 371 * If we haven't bound which network number to use as ours, 372 * we will use the number of the outgoing interface. 373 * This depends on having done a routing lookup, which 374 * we will probably have to do anyway, so we might 375 * as well do it now. On the other hand if we are 376 * sending to multiple destinations we may have already 377 * done the lookup, so see if we can use the route 378 * from before. In any case, we only 379 * chose a port number once, even if sending to multiple 380 * destinations. 381 */ 382 if (in_nullhost(inp->inp_laddr)) { 383 #if 0 384 struct route *ro; 385 386 ia = (struct in_ifaddr *)0; 387 /* 388 * If route is known or can be allocated now, 389 * our src addr is taken from the i/f, else punt. 390 */ 391 ro = &inp->inp_route; 392 if (ro->ro_rt && 393 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 394 sin->sin_addr) || 395 inp->inp_socket->so_options & SO_DONTROUTE)) { 396 RTFREE(ro->ro_rt); 397 ro->ro_rt = (struct rtentry *)0; 398 } 399 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 400 (ro->ro_rt == (struct rtentry *)0 || 401 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 402 /* No route yet, so try to acquire one */ 403 ro->ro_dst.sa_family = AF_INET; 404 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 405 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 406 rtalloc(ro); 407 } 408 /* 409 * If we found a route, use the address 410 * corresponding to the outgoing interface 411 * unless it is the loopback (in case a route 412 * to our address on another net goes to loopback). 413 * 414 * XXX Is this still true? Do we care? 415 */ 416 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 417 ia = ifatoia(ro->ro_rt->rt_ifa); 418 if (ia == NULL) { 419 u_int16_t fport = sin->sin_port; 420 421 sin->sin_port = 0; 422 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 423 sin->sin_port = fport; 424 if (ia == 0) { 425 /* Find 1st non-loopback AF_INET address */ 426 for (ia = in_ifaddr.tqh_first ; ia != NULL; 427 ia = ia->ia_list.tqe_next) { 428 if ((ia->ia_ifp->if_flags & 429 IFF_LOOPBACK) == 0) 430 break; 431 } 432 } 433 if (ia == NULL) 434 return (EADDRNOTAVAIL); 435 } 436 /* 437 * If the destination address is multicast and an outgoing 438 * interface has been set as a multicast option, use the 439 * address of that interface as our source address. 440 */ 441 if (IN_MULTICAST(sin->sin_addr.s_addr) && 442 inp->inp_moptions != NULL) { 443 struct ip_moptions *imo; 444 struct ifnet *ifp; 445 446 imo = inp->inp_moptions; 447 if (imo->imo_multicast_ifp != NULL) { 448 ifp = imo->imo_multicast_ifp; 449 IFP_TO_IA(ifp, ia); /* XXX */ 450 if (ia == 0) 451 return (EADDRNOTAVAIL); 452 } 453 } 454 ifaddr = satosin(&ia->ia_addr); 455 #else 456 int error; 457 ifaddr = in_selectsrc(sin, &inp->inp_route, 458 inp->inp_socket->so_options, inp->inp_moptions, &error); 459 if (ifaddr == NULL) { 460 if (error == 0) 461 error = EADDRNOTAVAIL; 462 return error; 463 } 464 #endif 465 } 466 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 467 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 468 inp->inp_lport) != 0) 469 return (EADDRINUSE); 470 if (in_nullhost(inp->inp_laddr)) { 471 if (inp->inp_lport == 0) { 472 error = in_pcbbind(inp, (struct mbuf *)0, 473 (struct proc *)0); 474 /* 475 * This used to ignore the return value 476 * completely, but we need to check for 477 * ephemeral port shortage. 478 * XXX Should we check for other errors, too? 479 */ 480 if (error == EAGAIN) 481 return (error); 482 } 483 inp->inp_laddr = ifaddr->sin_addr; 484 } 485 inp->inp_faddr = sin->sin_addr; 486 inp->inp_fport = sin->sin_port; 487 in_pcbstate(inp, INP_CONNECTED); 488 return (0); 489 } 490 491 void 492 in_pcbdisconnect(v) 493 void *v; 494 { 495 struct inpcb *inp = v; 496 497 inp->inp_faddr = zeroin_addr; 498 inp->inp_fport = 0; 499 in_pcbstate(inp, INP_BOUND); 500 if (inp->inp_socket->so_state & SS_NOFDREF) 501 in_pcbdetach(inp); 502 } 503 504 void 505 in_pcbdetach(v) 506 void *v; 507 { 508 struct inpcb *inp = v; 509 struct socket *so = inp->inp_socket; 510 int s; 511 512 #ifdef IPSEC 513 ipsec4_delete_pcbpolicy(inp); 514 #endif /*IPSEC*/ 515 so->so_pcb = 0; 516 sofree(so); 517 if (inp->inp_options) 518 (void)m_free(inp->inp_options); 519 if (inp->inp_route.ro_rt) 520 rtfree(inp->inp_route.ro_rt); 521 ip_freemoptions(inp->inp_moptions); 522 s = splnet(); 523 in_pcbstate(inp, INP_ATTACHED); 524 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 525 splx(s); 526 pool_put(&inpcb_pool, inp); 527 } 528 529 void 530 in_setsockaddr(inp, nam) 531 struct inpcb *inp; 532 struct mbuf *nam; 533 { 534 struct sockaddr_in *sin; 535 536 nam->m_len = sizeof (*sin); 537 sin = mtod(nam, struct sockaddr_in *); 538 bzero((caddr_t)sin, sizeof (*sin)); 539 sin->sin_family = AF_INET; 540 sin->sin_len = sizeof(*sin); 541 sin->sin_port = inp->inp_lport; 542 sin->sin_addr = inp->inp_laddr; 543 } 544 545 void 546 in_setpeeraddr(inp, nam) 547 struct inpcb *inp; 548 struct mbuf *nam; 549 { 550 struct sockaddr_in *sin; 551 552 nam->m_len = sizeof (*sin); 553 sin = mtod(nam, struct sockaddr_in *); 554 bzero((caddr_t)sin, sizeof (*sin)); 555 sin->sin_family = AF_INET; 556 sin->sin_len = sizeof(*sin); 557 sin->sin_port = inp->inp_fport; 558 sin->sin_addr = inp->inp_faddr; 559 } 560 561 /* 562 * Pass some notification to all connections of a protocol 563 * associated with address dst. The local address and/or port numbers 564 * may be specified to limit the search. The "usual action" will be 565 * taken, depending on the ctlinput cmd. The caller must filter any 566 * cmds that are uninteresting (e.g., no error in the map). 567 * Call the protocol specific routine (if any) to report 568 * any errors for each matching socket. 569 * 570 * Must be called at splsoftnet. 571 */ 572 int 573 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 574 struct inpcbtable *table; 575 struct in_addr faddr, laddr; 576 u_int fport_arg, lport_arg; 577 int errno; 578 void (*notify) __P((struct inpcb *, int)); 579 { 580 struct inpcbhead *head; 581 struct inpcb *inp, *ninp; 582 u_int16_t fport = fport_arg, lport = lport_arg; 583 int nmatch; 584 585 if (in_nullhost(faddr) || notify == 0) 586 return (0); 587 588 nmatch = 0; 589 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 590 for (inp = head->lh_first; inp != NULL; inp = ninp) { 591 ninp = inp->inp_hash.le_next; 592 if (in_hosteq(inp->inp_faddr, faddr) && 593 inp->inp_fport == fport && 594 inp->inp_lport == lport && 595 in_hosteq(inp->inp_laddr, laddr)) { 596 (*notify)(inp, errno); 597 nmatch++; 598 } 599 } 600 return (nmatch); 601 } 602 603 void 604 in_pcbnotifyall(table, faddr, errno, notify) 605 struct inpcbtable *table; 606 struct in_addr faddr; 607 int errno; 608 void (*notify) __P((struct inpcb *, int)); 609 { 610 struct inpcb *inp, *ninp; 611 612 if (in_nullhost(faddr) || notify == 0) 613 return; 614 615 for (inp = table->inpt_queue.cqh_first; 616 inp != (struct inpcb *)&table->inpt_queue; 617 inp = ninp) { 618 ninp = inp->inp_queue.cqe_next; 619 if (in_hosteq(inp->inp_faddr, faddr)) 620 (*notify)(inp, errno); 621 } 622 } 623 624 void 625 in_pcbpurgeif(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 = table->inpt_queue.cqh_first; 634 inp != (struct inpcb *)&table->inpt_queue; 635 inp = ninp) { 636 ninp = inp->inp_queue.cqe_next; 637 if (inp->inp_route.ro_rt != NULL && 638 inp->inp_route.ro_rt->rt_ifp == ifp) 639 in_rtchange(inp, 0); 640 imo = inp->inp_moptions; 641 if (imo != NULL) { 642 /* 643 * Unselect the outgoing interface if it is being 644 * detached. 645 */ 646 if (imo->imo_multicast_ifp == ifp) 647 imo->imo_multicast_ifp = NULL; 648 649 /* 650 * Drop multicast group membership if we joined 651 * through the interface being detached. 652 */ 653 for (i = 0, gap = 0; i < imo->imo_num_memberships; 654 i++) { 655 if (imo->imo_membership[i]->inm_ifp == ifp) { 656 in_delmulti(imo->imo_membership[i]); 657 gap++; 658 } else if (gap != 0) 659 imo->imo_membership[i - gap] = 660 imo->imo_membership[i]; 661 } 662 imo->imo_num_memberships -= gap; 663 } 664 } 665 } 666 667 /* 668 * Check for alternatives when higher level complains 669 * about service problems. For now, invalidate cached 670 * routing information. If the route was created dynamically 671 * (by a redirect), time to try a default gateway again. 672 */ 673 void 674 in_losing(inp) 675 struct inpcb *inp; 676 { 677 struct rtentry *rt; 678 struct rt_addrinfo info; 679 680 if ((rt = inp->inp_route.ro_rt)) { 681 inp->inp_route.ro_rt = 0; 682 bzero((caddr_t)&info, sizeof(info)); 683 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 684 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 685 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 686 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 687 if (rt->rt_flags & RTF_DYNAMIC) 688 (void) rtrequest(RTM_DELETE, rt_key(rt), 689 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 690 (struct rtentry **)0); 691 else 692 /* 693 * A new route can be allocated 694 * the next time output is attempted. 695 */ 696 rtfree(rt); 697 } 698 } 699 700 /* 701 * After a routing change, flush old routing 702 * and allocate a (hopefully) better one. 703 */ 704 void 705 in_rtchange(inp, errno) 706 struct inpcb *inp; 707 int errno; 708 { 709 710 if (inp->inp_route.ro_rt) { 711 rtfree(inp->inp_route.ro_rt); 712 inp->inp_route.ro_rt = 0; 713 /* 714 * A new route can be allocated the next time 715 * output is attempted. 716 */ 717 } 718 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 719 } 720 721 struct inpcb * 722 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 723 struct inpcbtable *table; 724 struct in_addr laddr; 725 u_int lport_arg; 726 int lookup_wildcard; 727 { 728 struct inpcb *inp, *match = 0; 729 int matchwild = 3, wildcard; 730 u_int16_t lport = lport_arg; 731 732 for (inp = table->inpt_queue.cqh_first; 733 inp != (struct inpcb *)&table->inpt_queue; 734 inp = inp->inp_queue.cqe_next) { 735 if (inp->inp_lport != lport) 736 continue; 737 wildcard = 0; 738 if (!in_nullhost(inp->inp_faddr)) 739 wildcard++; 740 if (in_nullhost(inp->inp_laddr)) { 741 if (!in_nullhost(laddr)) 742 wildcard++; 743 } else { 744 if (in_nullhost(laddr)) 745 wildcard++; 746 else { 747 if (!in_hosteq(inp->inp_laddr, laddr)) 748 continue; 749 } 750 } 751 if (wildcard && !lookup_wildcard) 752 continue; 753 if (wildcard < matchwild) { 754 match = inp; 755 matchwild = wildcard; 756 if (matchwild == 0) 757 break; 758 } 759 } 760 return (match); 761 } 762 763 #ifdef DIAGNOSTIC 764 int in_pcbnotifymiss = 0; 765 #endif 766 767 struct inpcb * 768 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 769 struct inpcbtable *table; 770 struct in_addr faddr, laddr; 771 u_int fport_arg, lport_arg; 772 { 773 struct inpcbhead *head; 774 struct inpcb *inp; 775 u_int16_t fport = fport_arg, lport = lport_arg; 776 777 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 778 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 779 if (in_hosteq(inp->inp_faddr, faddr) && 780 inp->inp_fport == fport && 781 inp->inp_lport == lport && 782 in_hosteq(inp->inp_laddr, laddr)) 783 goto out; 784 } 785 #ifdef DIAGNOSTIC 786 if (in_pcbnotifymiss) { 787 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 788 ntohl(faddr.s_addr), ntohs(fport), 789 ntohl(laddr.s_addr), ntohs(lport)); 790 } 791 #endif 792 return (0); 793 794 out: 795 /* Move this PCB to the head of hash chain. */ 796 if (inp != head->lh_first) { 797 LIST_REMOVE(inp, inp_hash); 798 LIST_INSERT_HEAD(head, inp, inp_hash); 799 } 800 return (inp); 801 } 802 803 struct inpcb * 804 in_pcblookup_bind(table, laddr, lport_arg) 805 struct inpcbtable *table; 806 struct in_addr laddr; 807 u_int lport_arg; 808 { 809 struct inpcbhead *head; 810 struct inpcb *inp; 811 u_int16_t lport = lport_arg; 812 813 head = INPCBHASH_BIND(table, laddr, lport); 814 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 815 if (inp->inp_lport == lport && 816 in_hosteq(inp->inp_laddr, laddr)) 817 goto out; 818 } 819 head = INPCBHASH_BIND(table, zeroin_addr, lport); 820 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 821 if (inp->inp_lport == lport && 822 in_hosteq(inp->inp_laddr, zeroin_addr)) 823 goto out; 824 } 825 #ifdef DIAGNOSTIC 826 if (in_pcbnotifymiss) { 827 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 828 ntohl(laddr.s_addr), ntohs(lport)); 829 } 830 #endif 831 return (0); 832 833 out: 834 /* Move this PCB to the head of hash chain. */ 835 if (inp != head->lh_first) { 836 LIST_REMOVE(inp, inp_hash); 837 LIST_INSERT_HEAD(head, inp, inp_hash); 838 } 839 return (inp); 840 } 841 842 void 843 in_pcbstate(inp, state) 844 struct inpcb *inp; 845 int state; 846 { 847 848 if (inp->inp_state > INP_ATTACHED) 849 LIST_REMOVE(inp, inp_hash); 850 851 switch (state) { 852 case INP_BOUND: 853 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 854 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 855 break; 856 case INP_CONNECTED: 857 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 858 inp->inp_faddr, inp->inp_fport, 859 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 860 break; 861 } 862 863 inp->inp_state = state; 864 } 865 866 struct rtentry * 867 in_pcbrtentry(inp) 868 struct inpcb *inp; 869 { 870 struct route *ro; 871 872 ro = &inp->inp_route; 873 874 if (ro->ro_rt == NULL) { 875 /* 876 * No route yet, so try to acquire one. 877 */ 878 if (!in_nullhost(inp->inp_faddr)) { 879 ro->ro_dst.sa_family = AF_INET; 880 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 881 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 882 rtalloc(ro); 883 } 884 } 885 return (ro->ro_rt); 886 } 887 888 struct sockaddr_in * 889 in_selectsrc(sin, ro, soopts, mopts, errorp) 890 struct sockaddr_in *sin; 891 struct route *ro; 892 int soopts; 893 struct ip_moptions *mopts; 894 int *errorp; 895 { 896 struct in_ifaddr *ia; 897 898 ia = (struct in_ifaddr *)0; 899 /* 900 * If route is known or can be allocated now, 901 * our src addr is taken from the i/f, else punt. 902 */ 903 if (ro->ro_rt && 904 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 905 soopts & SO_DONTROUTE)) { 906 RTFREE(ro->ro_rt); 907 ro->ro_rt = (struct rtentry *)0; 908 } 909 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 910 (ro->ro_rt == (struct rtentry *)0 || 911 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 912 /* No route yet, so try to acquire one */ 913 ro->ro_dst.sa_family = AF_INET; 914 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 915 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 916 rtalloc(ro); 917 } 918 /* 919 * If we found a route, use the address 920 * corresponding to the outgoing interface 921 * unless it is the loopback (in case a route 922 * to our address on another net goes to loopback). 923 * 924 * XXX Is this still true? Do we care? 925 */ 926 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 927 ia = ifatoia(ro->ro_rt->rt_ifa); 928 if (ia == NULL) { 929 u_int16_t fport = sin->sin_port; 930 931 sin->sin_port = 0; 932 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 933 sin->sin_port = fport; 934 if (ia == 0) { 935 /* Find 1st non-loopback AF_INET address */ 936 for (ia = in_ifaddr.tqh_first; 937 ia != NULL; 938 ia = ia->ia_list.tqe_next) { 939 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 940 break; 941 } 942 } 943 if (ia == NULL) { 944 *errorp = EADDRNOTAVAIL; 945 return NULL; 946 } 947 } 948 /* 949 * If the destination address is multicast and an outgoing 950 * interface has been set as a multicast option, use the 951 * address of that interface as our source address. 952 */ 953 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 954 struct ip_moptions *imo; 955 struct ifnet *ifp; 956 957 imo = mopts; 958 if (imo->imo_multicast_ifp != NULL) { 959 ifp = imo->imo_multicast_ifp; 960 IFP_TO_IA(ifp, ia); /* XXX */ 961 if (ia == 0) { 962 *errorp = EADDRNOTAVAIL; 963 return NULL; 964 } 965 } 966 } 967 return satosin(&ia->ia_addr); 968 } 969
Indexes created Mon Sep 22 05:09:51 GMT 2025