in_pcb.c revision 1.58.4.2
1 /* $NetBSD: in_pcb.c,v 1.58.4.2 1999/08/02 22:34:57 thorpej 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 register 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 register struct inpcb *inp = v; 207 register struct socket *so = inp->inp_socket; 208 register struct inpcbtable *table = inp->inp_table; 209 register 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 register void *v; 337 struct mbuf *nam; 338 { 339 register struct inpcb *inp = v; 340 struct in_ifaddr *ia; 341 struct sockaddr_in *ifaddr = NULL; 342 register 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 register 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 == 0) { 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 & IFF_LOOPBACK)) 429 break; 430 if (ia == 0) 431 return (EADDRNOTAVAIL); 432 } 433 /* 434 * If the destination address is multicast and an outgoing 435 * interface has been set as a multicast option, use the 436 * address of that interface as our source address. 437 */ 438 if (IN_MULTICAST(sin->sin_addr.s_addr) && 439 inp->inp_moptions != NULL) { 440 struct ip_moptions *imo; 441 struct ifnet *ifp; 442 443 imo = inp->inp_moptions; 444 if (imo->imo_multicast_ifp != NULL) { 445 ifp = imo->imo_multicast_ifp; 446 IFP_TO_IA(ifp, ia); /* XXX */ 447 if (ia == 0) 448 return (EADDRNOTAVAIL); 449 } 450 } 451 ifaddr = satosin(&ia->ia_addr); 452 #else 453 int error; 454 ifaddr = in_selectsrc(sin, &inp->inp_route, 455 inp->inp_socket->so_options, inp->inp_moptions, &error); 456 if (ifaddr == NULL) { 457 if (error == 0) 458 error = EADDRNOTAVAIL; 459 return error; 460 } 461 #endif 462 } 463 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 464 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 465 inp->inp_lport) != 0) 466 return (EADDRINUSE); 467 if (in_nullhost(inp->inp_laddr)) { 468 if (inp->inp_lport == 0) { 469 error = in_pcbbind(inp, (struct mbuf *)0, 470 (struct proc *)0); 471 /* 472 * This used to ignore the return value 473 * completely, but we need to check for 474 * ephemeral port shortage. 475 * XXX Should we check for other errors, too? 476 */ 477 if (error == EAGAIN) 478 return (error); 479 } 480 inp->inp_laddr = ifaddr->sin_addr; 481 } 482 inp->inp_faddr = sin->sin_addr; 483 inp->inp_fport = sin->sin_port; 484 in_pcbstate(inp, INP_CONNECTED); 485 return (0); 486 } 487 488 void 489 in_pcbdisconnect(v) 490 void *v; 491 { 492 struct inpcb *inp = v; 493 494 inp->inp_faddr = zeroin_addr; 495 inp->inp_fport = 0; 496 in_pcbstate(inp, INP_BOUND); 497 if (inp->inp_socket->so_state & SS_NOFDREF) 498 in_pcbdetach(inp); 499 } 500 501 void 502 in_pcbdetach(v) 503 void *v; 504 { 505 struct inpcb *inp = v; 506 struct socket *so = inp->inp_socket; 507 int s; 508 509 #ifdef IPSEC 510 if (so->so_pcb) { 511 KEYDEBUG(KEYDEBUG_KEY_STAMP, 512 printf("DP call free SO=%p from in_pcbdetach\n", so)); 513 key_freeso(so); 514 } 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 register struct inpcb *inp; 534 struct mbuf *nam; 535 { 536 register 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 register 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 register 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 register 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 /* 627 * Check for alternatives when higher level complains 628 * about service problems. For now, invalidate cached 629 * routing information. If the route was created dynamically 630 * (by a redirect), time to try a default gateway again. 631 */ 632 void 633 in_losing(inp) 634 struct inpcb *inp; 635 { 636 register struct rtentry *rt; 637 struct rt_addrinfo info; 638 639 if ((rt = inp->inp_route.ro_rt)) { 640 inp->inp_route.ro_rt = 0; 641 bzero((caddr_t)&info, sizeof(info)); 642 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 643 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 644 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 645 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 646 if (rt->rt_flags & RTF_DYNAMIC) 647 (void) rtrequest(RTM_DELETE, rt_key(rt), 648 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 649 (struct rtentry **)0); 650 else 651 /* 652 * A new route can be allocated 653 * the next time output is attempted. 654 */ 655 rtfree(rt); 656 } 657 } 658 659 /* 660 * After a routing change, flush old routing 661 * and allocate a (hopefully) better one. 662 */ 663 void 664 in_rtchange(inp, errno) 665 register struct inpcb *inp; 666 int errno; 667 { 668 669 if (inp->inp_route.ro_rt) { 670 rtfree(inp->inp_route.ro_rt); 671 inp->inp_route.ro_rt = 0; 672 /* 673 * A new route can be allocated the next time 674 * output is attempted. 675 */ 676 } 677 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 678 } 679 680 struct inpcb * 681 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 682 struct inpcbtable *table; 683 struct in_addr laddr; 684 u_int lport_arg; 685 int lookup_wildcard; 686 { 687 register struct inpcb *inp, *match = 0; 688 int matchwild = 3, wildcard; 689 u_int16_t lport = lport_arg; 690 691 for (inp = table->inpt_queue.cqh_first; 692 inp != (struct inpcb *)&table->inpt_queue; 693 inp = inp->inp_queue.cqe_next) { 694 if (inp->inp_lport != lport) 695 continue; 696 wildcard = 0; 697 if (!in_nullhost(inp->inp_faddr)) 698 wildcard++; 699 if (in_nullhost(inp->inp_laddr)) { 700 if (!in_nullhost(laddr)) 701 wildcard++; 702 } else { 703 if (in_nullhost(laddr)) 704 wildcard++; 705 else { 706 if (!in_hosteq(inp->inp_laddr, laddr)) 707 continue; 708 } 709 } 710 if (wildcard && !lookup_wildcard) 711 continue; 712 if (wildcard < matchwild) { 713 match = inp; 714 matchwild = wildcard; 715 if (matchwild == 0) 716 break; 717 } 718 } 719 return (match); 720 } 721 722 #ifdef DIAGNOSTIC 723 int in_pcbnotifymiss = 0; 724 #endif 725 726 struct inpcb * 727 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 728 struct inpcbtable *table; 729 struct in_addr faddr, laddr; 730 u_int fport_arg, lport_arg; 731 { 732 struct inpcbhead *head; 733 register struct inpcb *inp; 734 u_int16_t fport = fport_arg, lport = lport_arg; 735 736 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 737 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 738 if (in_hosteq(inp->inp_faddr, faddr) && 739 inp->inp_fport == fport && 740 inp->inp_lport == lport && 741 in_hosteq(inp->inp_laddr, laddr)) 742 goto out; 743 } 744 #ifdef DIAGNOSTIC 745 if (in_pcbnotifymiss) { 746 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 747 ntohl(faddr.s_addr), ntohs(fport), 748 ntohl(laddr.s_addr), ntohs(lport)); 749 } 750 #endif 751 return (0); 752 753 out: 754 /* Move this PCB to the head of hash chain. */ 755 if (inp != head->lh_first) { 756 LIST_REMOVE(inp, inp_hash); 757 LIST_INSERT_HEAD(head, inp, inp_hash); 758 } 759 return (inp); 760 } 761 762 struct inpcb * 763 in_pcblookup_bind(table, laddr, lport_arg) 764 struct inpcbtable *table; 765 struct in_addr laddr; 766 u_int lport_arg; 767 { 768 struct inpcbhead *head; 769 register struct inpcb *inp; 770 u_int16_t lport = lport_arg; 771 772 head = INPCBHASH_BIND(table, laddr, lport); 773 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 774 if (inp->inp_lport == lport && 775 in_hosteq(inp->inp_laddr, laddr)) 776 goto out; 777 } 778 head = INPCBHASH_BIND(table, zeroin_addr, lport); 779 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 780 if (inp->inp_lport == lport && 781 in_hosteq(inp->inp_laddr, zeroin_addr)) 782 goto out; 783 } 784 #ifdef DIAGNOSTIC 785 if (in_pcbnotifymiss) { 786 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 787 ntohl(laddr.s_addr), ntohs(lport)); 788 } 789 #endif 790 return (0); 791 792 out: 793 /* Move this PCB to the head of hash chain. */ 794 if (inp != head->lh_first) { 795 LIST_REMOVE(inp, inp_hash); 796 LIST_INSERT_HEAD(head, inp, inp_hash); 797 } 798 return (inp); 799 } 800 801 void 802 in_pcbstate(inp, state) 803 struct inpcb *inp; 804 int state; 805 { 806 807 if (inp->inp_state > INP_ATTACHED) 808 LIST_REMOVE(inp, inp_hash); 809 810 switch (state) { 811 case INP_BOUND: 812 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 813 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 814 break; 815 case INP_CONNECTED: 816 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 817 inp->inp_faddr, inp->inp_fport, 818 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 819 break; 820 } 821 822 inp->inp_state = state; 823 } 824 825 struct rtentry * 826 in_pcbrtentry(inp) 827 struct inpcb *inp; 828 { 829 struct route *ro; 830 831 ro = &inp->inp_route; 832 833 if (ro->ro_rt == NULL) { 834 /* 835 * No route yet, so try to acquire one. 836 */ 837 if (!in_nullhost(inp->inp_faddr)) { 838 ro->ro_dst.sa_family = AF_INET; 839 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 840 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 841 rtalloc(ro); 842 } 843 } 844 return (ro->ro_rt); 845 } 846 847 struct sockaddr_in * 848 in_selectsrc(sin, ro, soopts, mopts, errorp) 849 struct sockaddr_in *sin; 850 struct route *ro; 851 int soopts; 852 struct ip_moptions *mopts; 853 int *errorp; 854 { 855 struct in_ifaddr *ia; 856 857 ia = (struct in_ifaddr *)0; 858 /* 859 * If route is known or can be allocated now, 860 * our src addr is taken from the i/f, else punt. 861 */ 862 if (ro->ro_rt && 863 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 864 soopts & SO_DONTROUTE)) { 865 RTFREE(ro->ro_rt); 866 ro->ro_rt = (struct rtentry *)0; 867 } 868 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 869 (ro->ro_rt == (struct rtentry *)0 || 870 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 871 /* No route yet, so try to acquire one */ 872 ro->ro_dst.sa_family = AF_INET; 873 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 874 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 875 rtalloc(ro); 876 } 877 /* 878 * If we found a route, use the address 879 * corresponding to the outgoing interface 880 * unless it is the loopback (in case a route 881 * to our address on another net goes to loopback). 882 * 883 * XXX Is this still true? Do we care? 884 */ 885 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 886 ia = ifatoia(ro->ro_rt->rt_ifa); 887 if (ia == 0) { 888 u_int16_t fport = sin->sin_port; 889 890 sin->sin_port = 0; 891 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 892 sin->sin_port = fport; 893 if (ia == 0) { 894 /* Find 1st non-loopback AF_INET address */ 895 for (ia = in_ifaddr.tqh_first; 896 ia != NULL; 897 ia = ia->ia_list.tqe_next) 898 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 899 break; 900 } 901 if (ia == 0) { 902 *errorp = EADDRNOTAVAIL; 903 return NULL; 904 } 905 } 906 /* 907 * If the destination address is multicast and an outgoing 908 * interface has been set as a multicast option, use the 909 * address of that interface as our source address. 910 */ 911 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 912 struct ip_moptions *imo; 913 struct ifnet *ifp; 914 915 imo = mopts; 916 if (imo->imo_multicast_ifp != NULL) { 917 ifp = imo->imo_multicast_ifp; 918 IFP_TO_IA(ifp, ia); /* XXX */ 919 if (ia == 0) { 920 *errorp = EADDRNOTAVAIL; 921 return NULL; 922 } 923 } 924 } 925 return satosin(&ia->ia_addr); 926 } 927
Indexes created Wed Oct 15 16:09:53 GMT 2025