in_pcb.c revision 1.59
1 /* $NetBSD: in_pcb.c,v 1.59 1999/07/01 08:12:50 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 <sys/param.h> 105 #include <sys/systm.h> 106 #include <sys/malloc.h> 107 #include <sys/mbuf.h> 108 #include <sys/protosw.h> 109 #include <sys/socket.h> 110 #include <sys/socketvar.h> 111 #include <sys/ioctl.h> 112 #include <sys/errno.h> 113 #include <sys/time.h> 114 #include <sys/pool.h> 115 #include <sys/proc.h> 116 117 #include <net/if.h> 118 #include <net/route.h> 119 120 #include <netinet/in.h> 121 #include <netinet/in_systm.h> 122 #include <netinet/ip.h> 123 #include <netinet/in_pcb.h> 124 #include <netinet/in_var.h> 125 #include <netinet/ip_var.h> 126 127 #ifdef IPSEC 128 #include <netinet6/ipsec.h> 129 #include <netkey/key.h> 130 #include <netkey/key_debug.h> 131 #endif /* IPSEC */ 132 133 struct in_addr zeroin_addr; 134 135 #define INPCBHASH_BIND(table, laddr, lport) \ 136 &(table)->inpt_bindhashtbl[ \ 137 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 138 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 139 &(table)->inpt_connecthashtbl[ \ 140 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 141 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 142 143 struct inpcb * 144 in_pcblookup_port __P((struct inpcbtable *, 145 struct in_addr, u_int, int)); 146 147 int anonportmin = IPPORT_ANONMIN; 148 int anonportmax = IPPORT_ANONMAX; 149 150 struct pool inpcb_pool; 151 152 void 153 in_pcbinit(table, bindhashsize, connecthashsize) 154 struct inpcbtable *table; 155 int bindhashsize, connecthashsize; 156 { 157 static int inpcb_pool_initialized; 158 159 if (inpcb_pool_initialized == 0) { 160 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 161 "inpcbpl", 0, NULL, NULL, M_PCB); 162 inpcb_pool_initialized = 1; 163 } 164 165 CIRCLEQ_INIT(&table->inpt_queue); 166 table->inpt_bindhashtbl = 167 hashinit(bindhashsize, M_PCB, M_WAITOK, &table->inpt_bindhash); 168 table->inpt_connecthashtbl = 169 hashinit(connecthashsize, M_PCB, M_WAITOK, &table->inpt_connecthash); 170 table->inpt_lastlow = IPPORT_RESERVEDMAX; 171 table->inpt_lastport = (u_int16_t)anonportmax; 172 } 173 174 int 175 in_pcballoc(so, v) 176 struct socket *so; 177 void *v; 178 { 179 struct inpcbtable *table = v; 180 register struct inpcb *inp; 181 int s; 182 183 inp = pool_get(&inpcb_pool, PR_NOWAIT); 184 if (inp == NULL) 185 return (ENOBUFS); 186 bzero((caddr_t)inp, sizeof(*inp)); 187 inp->inp_table = table; 188 inp->inp_socket = so; 189 inp->inp_errormtu = -1; 190 so->so_pcb = inp; 191 s = splnet(); 192 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 193 in_pcbstate(inp, INP_ATTACHED); 194 splx(s); 195 return (0); 196 } 197 198 int 199 in_pcbbind(v, nam, p) 200 void *v; 201 struct mbuf *nam; 202 struct proc *p; 203 { 204 register struct inpcb *inp = v; 205 register struct socket *so = inp->inp_socket; 206 register struct inpcbtable *table = inp->inp_table; 207 register struct sockaddr_in *sin; 208 u_int16_t lport = 0; 209 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 210 #ifndef IPNOPRIVPORTS 211 int error; 212 #endif 213 214 if (in_ifaddr.tqh_first == 0) 215 return (EADDRNOTAVAIL); 216 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 217 return (EINVAL); 218 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 219 wild = 1; 220 if (nam == 0) 221 goto noname; 222 sin = mtod(nam, struct sockaddr_in *); 223 if (nam->m_len != sizeof (*sin)) 224 return (EINVAL); 225 #ifdef notdef 226 /* 227 * We should check the family, but old programs 228 * incorrectly fail to initialize it. 229 */ 230 if (sin->sin_family != AF_INET) 231 return (EAFNOSUPPORT); 232 #endif 233 lport = sin->sin_port; 234 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 235 /* 236 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 237 * allow complete duplication of binding if 238 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 239 * and a multicast address is bound on both 240 * new and duplicated sockets. 241 */ 242 if (so->so_options & SO_REUSEADDR) 243 reuseport = SO_REUSEADDR|SO_REUSEPORT; 244 } else if (!in_nullhost(sin->sin_addr)) { 245 sin->sin_port = 0; /* yech... */ 246 if (ifa_ifwithaddr(sintosa(sin)) == 0) 247 return (EADDRNOTAVAIL); 248 } 249 if (lport) { 250 struct inpcb *t; 251 #ifndef IPNOPRIVPORTS 252 /* GROSS */ 253 if (ntohs(lport) < IPPORT_RESERVED && 254 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 255 return (EACCES); 256 #endif 257 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 258 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 259 /* 260 * XXX: investigate ramifications of loosening this 261 * restriction so that as long as both ports have 262 * SO_REUSEPORT allow the bind 263 */ 264 if (t && 265 (!in_nullhost(sin->sin_addr) || 266 !in_nullhost(t->inp_laddr) || 267 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 268 && (so->so_uid != t->inp_socket->so_uid)) { 269 return (EADDRINUSE); 270 } 271 } 272 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 273 if (t && (reuseport & t->inp_socket->so_options) == 0) 274 return (EADDRINUSE); 275 } 276 inp->inp_laddr = sin->sin_addr; 277 278 noname: 279 if (lport == 0) { 280 int cnt; 281 u_int16_t min, max; 282 u_int16_t *lastport; 283 284 if (inp->inp_flags & INP_LOWPORT) { 285 #ifndef IPNOPRIVPORTS 286 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 287 return (EACCES); 288 #endif 289 min = IPPORT_RESERVEDMIN; 290 max = IPPORT_RESERVEDMAX; 291 lastport = &table->inpt_lastlow; 292 } else { 293 min = anonportmin; 294 max = anonportmax; 295 lastport = &table->inpt_lastport; 296 } 297 if (min > max) { /* sanity check */ 298 u_int16_t swp; 299 300 swp = min; 301 min = max; 302 max = swp; 303 } 304 305 lport = *lastport - 1; 306 for (cnt = max - min + 1; cnt; cnt--, lport--) { 307 if (lport < min || lport > max) 308 lport = max; 309 if (!in_pcblookup_port(table, inp->inp_laddr, 310 htons(lport), 1)) 311 goto found; 312 } 313 if (!in_nullhost(inp->inp_laddr)) 314 inp->inp_laddr.s_addr = INADDR_ANY; 315 return (EAGAIN); 316 found: 317 inp->inp_flags |= INP_ANONPORT; 318 *lastport = lport; 319 lport = htons(lport); 320 } 321 inp->inp_lport = lport; 322 in_pcbstate(inp, INP_BOUND); 323 return (0); 324 } 325 326 /* 327 * Connect from a socket to a specified address. 328 * Both address and port must be specified in argument sin. 329 * If don't have a local address for this socket yet, 330 * then pick one. 331 */ 332 int 333 in_pcbconnect(v, nam) 334 register void *v; 335 struct mbuf *nam; 336 { 337 register struct inpcb *inp = v; 338 struct in_ifaddr *ia; 339 struct sockaddr_in *ifaddr = NULL; 340 register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 341 int error; 342 343 if (nam->m_len != sizeof (*sin)) 344 return (EINVAL); 345 if (sin->sin_family != AF_INET) 346 return (EAFNOSUPPORT); 347 if (sin->sin_port == 0) 348 return (EADDRNOTAVAIL); 349 if (in_ifaddr.tqh_first != 0) { 350 /* 351 * If the destination address is INADDR_ANY, 352 * use any local address (likely loopback). 353 * If the supplied address is INADDR_BROADCAST, 354 * use the broadcast address of an interface 355 * which supports broadcast. (loopback does not) 356 */ 357 358 if (in_nullhost(sin->sin_addr)) 359 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 360 else if (sin->sin_addr.s_addr == INADDR_BROADCAST) 361 for (ia = in_ifaddr.tqh_first; ia != NULL; 362 ia = ia->ia_list.tqe_next) 363 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 364 sin->sin_addr = ia->ia_broadaddr.sin_addr; 365 break; 366 } 367 } 368 /* 369 * If we haven't bound which network number to use as ours, 370 * we will use the number of the outgoing interface. 371 * This depends on having done a routing lookup, which 372 * we will probably have to do anyway, so we might 373 * as well do it now. On the other hand if we are 374 * sending to multiple destinations we may have already 375 * done the lookup, so see if we can use the route 376 * from before. In any case, we only 377 * chose a port number once, even if sending to multiple 378 * destinations. 379 */ 380 if (in_nullhost(inp->inp_laddr)) { 381 #if 0 382 register struct route *ro; 383 384 ia = (struct in_ifaddr *)0; 385 /* 386 * If route is known or can be allocated now, 387 * our src addr is taken from the i/f, else punt. 388 */ 389 ro = &inp->inp_route; 390 if (ro->ro_rt && 391 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 392 sin->sin_addr) || 393 inp->inp_socket->so_options & SO_DONTROUTE)) { 394 RTFREE(ro->ro_rt); 395 ro->ro_rt = (struct rtentry *)0; 396 } 397 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 398 (ro->ro_rt == (struct rtentry *)0 || 399 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 400 /* No route yet, so try to acquire one */ 401 ro->ro_dst.sa_family = AF_INET; 402 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 403 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 404 rtalloc(ro); 405 } 406 /* 407 * If we found a route, use the address 408 * corresponding to the outgoing interface 409 * unless it is the loopback (in case a route 410 * to our address on another net goes to loopback). 411 * 412 * XXX Is this still true? Do we care? 413 */ 414 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 415 ia = ifatoia(ro->ro_rt->rt_ifa); 416 if (ia == 0) { 417 u_int16_t fport = sin->sin_port; 418 419 sin->sin_port = 0; 420 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 421 sin->sin_port = fport; 422 if (ia == 0) 423 /* Find 1st non-loopback AF_INET address */ 424 for (ia = in_ifaddr.tqh_first ; ia != NULL ; 425 ia = ia->ia_list.tqe_next) 426 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 427 break; 428 if (ia == 0) 429 return (EADDRNOTAVAIL); 430 } 431 /* 432 * If the destination address is multicast and an outgoing 433 * interface has been set as a multicast option, use the 434 * address of that interface as our source address. 435 */ 436 if (IN_MULTICAST(sin->sin_addr.s_addr) && 437 inp->inp_moptions != NULL) { 438 struct ip_moptions *imo; 439 struct ifnet *ifp; 440 441 imo = inp->inp_moptions; 442 if (imo->imo_multicast_ifp != NULL) { 443 ifp = imo->imo_multicast_ifp; 444 IFP_TO_IA(ifp, ia); /* XXX */ 445 if (ia == 0) 446 return (EADDRNOTAVAIL); 447 } 448 } 449 ifaddr = satosin(&ia->ia_addr); 450 #else 451 int error; 452 ifaddr = in_selectsrc(sin, &inp->inp_route, 453 inp->inp_socket->so_options, inp->inp_moptions, &error); 454 if (ifaddr == NULL) { 455 if (error == 0) 456 error = EADDRNOTAVAIL; 457 return error; 458 } 459 #endif 460 } 461 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 462 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 463 inp->inp_lport) != 0) 464 return (EADDRINUSE); 465 if (in_nullhost(inp->inp_laddr)) { 466 if (inp->inp_lport == 0) { 467 error = in_pcbbind(inp, (struct mbuf *)0, 468 (struct proc *)0); 469 /* 470 * This used to ignore the return value 471 * completely, but we need to check for 472 * ephemeral port shortage. 473 * XXX Should we check for other errors, too? 474 */ 475 if (error == EAGAIN) 476 return (error); 477 } 478 inp->inp_laddr = ifaddr->sin_addr; 479 } 480 inp->inp_faddr = sin->sin_addr; 481 inp->inp_fport = sin->sin_port; 482 in_pcbstate(inp, INP_CONNECTED); 483 return (0); 484 } 485 486 void 487 in_pcbdisconnect(v) 488 void *v; 489 { 490 struct inpcb *inp = v; 491 492 inp->inp_faddr = zeroin_addr; 493 inp->inp_fport = 0; 494 in_pcbstate(inp, INP_BOUND); 495 if (inp->inp_socket->so_state & SS_NOFDREF) 496 in_pcbdetach(inp); 497 } 498 499 void 500 in_pcbdetach(v) 501 void *v; 502 { 503 struct inpcb *inp = v; 504 struct socket *so = inp->inp_socket; 505 int s; 506 507 #ifdef IPSEC 508 if (so->so_pcb) { 509 KEYDEBUG(KEYDEBUG_KEY_STAMP, 510 printf("DP call free SO=%p from in_pcbdetach\n", so)); 511 key_freeso(so); 512 } 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 register struct inpcb *inp; 532 struct mbuf *nam; 533 { 534 register 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 register 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 register 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 register 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 /* 625 * Check for alternatives when higher level complains 626 * about service problems. For now, invalidate cached 627 * routing information. If the route was created dynamically 628 * (by a redirect), time to try a default gateway again. 629 */ 630 void 631 in_losing(inp) 632 struct inpcb *inp; 633 { 634 register struct rtentry *rt; 635 struct rt_addrinfo info; 636 637 if ((rt = inp->inp_route.ro_rt)) { 638 inp->inp_route.ro_rt = 0; 639 bzero((caddr_t)&info, sizeof(info)); 640 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 641 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 642 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 643 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 644 if (rt->rt_flags & RTF_DYNAMIC) 645 (void) rtrequest(RTM_DELETE, rt_key(rt), 646 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 647 (struct rtentry **)0); 648 else 649 /* 650 * A new route can be allocated 651 * the next time output is attempted. 652 */ 653 rtfree(rt); 654 } 655 } 656 657 /* 658 * After a routing change, flush old routing 659 * and allocate a (hopefully) better one. 660 */ 661 void 662 in_rtchange(inp, errno) 663 register struct inpcb *inp; 664 int errno; 665 { 666 667 if (inp->inp_route.ro_rt) { 668 rtfree(inp->inp_route.ro_rt); 669 inp->inp_route.ro_rt = 0; 670 /* 671 * A new route can be allocated the next time 672 * output is attempted. 673 */ 674 } 675 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 676 } 677 678 struct inpcb * 679 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 680 struct inpcbtable *table; 681 struct in_addr laddr; 682 u_int lport_arg; 683 int lookup_wildcard; 684 { 685 register struct inpcb *inp, *match = 0; 686 int matchwild = 3, wildcard; 687 u_int16_t lport = lport_arg; 688 689 for (inp = table->inpt_queue.cqh_first; 690 inp != (struct inpcb *)&table->inpt_queue; 691 inp = inp->inp_queue.cqe_next) { 692 if (inp->inp_lport != lport) 693 continue; 694 wildcard = 0; 695 if (!in_nullhost(inp->inp_faddr)) 696 wildcard++; 697 if (in_nullhost(inp->inp_laddr)) { 698 if (!in_nullhost(laddr)) 699 wildcard++; 700 } else { 701 if (in_nullhost(laddr)) 702 wildcard++; 703 else { 704 if (!in_hosteq(inp->inp_laddr, laddr)) 705 continue; 706 } 707 } 708 if (wildcard && !lookup_wildcard) 709 continue; 710 if (wildcard < matchwild) { 711 match = inp; 712 matchwild = wildcard; 713 if (matchwild == 0) 714 break; 715 } 716 } 717 return (match); 718 } 719 720 #ifdef DIAGNOSTIC 721 int in_pcbnotifymiss = 0; 722 #endif 723 724 struct inpcb * 725 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 726 struct inpcbtable *table; 727 struct in_addr faddr, laddr; 728 u_int fport_arg, lport_arg; 729 { 730 struct inpcbhead *head; 731 register struct inpcb *inp; 732 u_int16_t fport = fport_arg, lport = lport_arg; 733 734 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 735 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 736 if (in_hosteq(inp->inp_faddr, faddr) && 737 inp->inp_fport == fport && 738 inp->inp_lport == lport && 739 in_hosteq(inp->inp_laddr, laddr)) 740 goto out; 741 } 742 #ifdef DIAGNOSTIC 743 if (in_pcbnotifymiss) { 744 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 745 ntohl(faddr.s_addr), ntohs(fport), 746 ntohl(laddr.s_addr), ntohs(lport)); 747 } 748 #endif 749 return (0); 750 751 out: 752 /* Move this PCB to the head of hash chain. */ 753 if (inp != head->lh_first) { 754 LIST_REMOVE(inp, inp_hash); 755 LIST_INSERT_HEAD(head, inp, inp_hash); 756 } 757 return (inp); 758 } 759 760 struct inpcb * 761 in_pcblookup_bind(table, laddr, lport_arg) 762 struct inpcbtable *table; 763 struct in_addr laddr; 764 u_int lport_arg; 765 { 766 struct inpcbhead *head; 767 register struct inpcb *inp; 768 u_int16_t lport = lport_arg; 769 770 head = INPCBHASH_BIND(table, laddr, lport); 771 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 772 if (inp->inp_lport == lport && 773 in_hosteq(inp->inp_laddr, laddr)) 774 goto out; 775 } 776 head = INPCBHASH_BIND(table, zeroin_addr, lport); 777 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 778 if (inp->inp_lport == lport && 779 in_hosteq(inp->inp_laddr, zeroin_addr)) 780 goto out; 781 } 782 #ifdef DIAGNOSTIC 783 if (in_pcbnotifymiss) { 784 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 785 ntohl(laddr.s_addr), ntohs(lport)); 786 } 787 #endif 788 return (0); 789 790 out: 791 /* Move this PCB to the head of hash chain. */ 792 if (inp != head->lh_first) { 793 LIST_REMOVE(inp, inp_hash); 794 LIST_INSERT_HEAD(head, inp, inp_hash); 795 } 796 return (inp); 797 } 798 799 void 800 in_pcbstate(inp, state) 801 struct inpcb *inp; 802 int state; 803 { 804 805 if (inp->inp_state > INP_ATTACHED) 806 LIST_REMOVE(inp, inp_hash); 807 808 switch (state) { 809 case INP_BOUND: 810 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 811 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 812 break; 813 case INP_CONNECTED: 814 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 815 inp->inp_faddr, inp->inp_fport, 816 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 817 break; 818 } 819 820 inp->inp_state = state; 821 } 822 823 struct rtentry * 824 in_pcbrtentry(inp) 825 struct inpcb *inp; 826 { 827 struct route *ro; 828 829 ro = &inp->inp_route; 830 831 if (ro->ro_rt == NULL) { 832 /* 833 * No route yet, so try to acquire one. 834 */ 835 if (!in_nullhost(inp->inp_faddr)) { 836 ro->ro_dst.sa_family = AF_INET; 837 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 838 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 839 rtalloc(ro); 840 } 841 } 842 return (ro->ro_rt); 843 } 844 845 struct sockaddr_in * 846 in_selectsrc(sin, ro, soopts, mopts, errorp) 847 struct sockaddr_in *sin; 848 struct route *ro; 849 int soopts; 850 struct ip_moptions *mopts; 851 int *errorp; 852 { 853 struct in_ifaddr *ia; 854 855 ia = (struct in_ifaddr *)0; 856 /* 857 * If route is known or can be allocated now, 858 * our src addr is taken from the i/f, else punt. 859 */ 860 if (ro->ro_rt && 861 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || 862 soopts & SO_DONTROUTE)) { 863 RTFREE(ro->ro_rt); 864 ro->ro_rt = (struct rtentry *)0; 865 } 866 if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ 867 (ro->ro_rt == (struct rtentry *)0 || 868 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 869 /* No route yet, so try to acquire one */ 870 ro->ro_dst.sa_family = AF_INET; 871 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 872 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 873 rtalloc(ro); 874 } 875 /* 876 * If we found a route, use the address 877 * corresponding to the outgoing interface 878 * unless it is the loopback (in case a route 879 * to our address on another net goes to loopback). 880 * 881 * XXX Is this still true? Do we care? 882 */ 883 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 884 ia = ifatoia(ro->ro_rt->rt_ifa); 885 if (ia == 0) { 886 u_int16_t fport = sin->sin_port; 887 888 sin->sin_port = 0; 889 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 890 sin->sin_port = fport; 891 if (ia == 0) { 892 /* Find 1st non-loopback AF_INET address */ 893 for (ia = in_ifaddr.tqh_first; 894 ia != NULL; 895 ia = ia->ia_list.tqe_next) 896 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 897 break; 898 } 899 if (ia == 0) { 900 *errorp = EADDRNOTAVAIL; 901 return NULL; 902 } 903 } 904 /* 905 * If the destination address is multicast and an outgoing 906 * interface has been set as a multicast option, use the 907 * address of that interface as our source address. 908 */ 909 if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { 910 struct ip_moptions *imo; 911 struct ifnet *ifp; 912 913 imo = mopts; 914 if (imo->imo_multicast_ifp != NULL) { 915 ifp = imo->imo_multicast_ifp; 916 IFP_TO_IA(ifp, ia); /* XXX */ 917 if (ia == 0) { 918 *errorp = EADDRNOTAVAIL; 919 return NULL; 920 } 921 } 922 } 923 return satosin(&ia->ia_addr); 924 } 925
Indexes created Wed Sep 24 05:09:52 GMT 2025