in_pcb.c revision 1.58
1 /* $NetBSD: in_pcb.c,v 1.58 1999/03/23 10:45:37 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Public Access Networks Corporation ("Panix"). It was developed under 9 * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1982, 1986, 1991, 1993, 1995 42 * The Regents of the University of California. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 73 */ 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/malloc.h> 78 #include <sys/mbuf.h> 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/ioctl.h> 83 #include <sys/errno.h> 84 #include <sys/time.h> 85 #include <sys/pool.h> 86 #include <sys/proc.h> 87 88 #include <net/if.h> 89 #include <net/route.h> 90 91 #include <netinet/in.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/ip.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet/in_var.h> 96 #include <netinet/ip_var.h> 97 98 struct in_addr zeroin_addr; 99 100 #define INPCBHASH_BIND(table, laddr, lport) \ 101 &(table)->inpt_bindhashtbl[ \ 102 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 103 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 104 &(table)->inpt_connecthashtbl[ \ 105 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 106 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 107 108 struct inpcb * 109 in_pcblookup_port __P((struct inpcbtable *, 110 struct in_addr, u_int, int)); 111 112 int anonportmin = IPPORT_ANONMIN; 113 int anonportmax = IPPORT_ANONMAX; 114 115 struct pool inpcb_pool; 116 117 void 118 in_pcbinit(table, bindhashsize, connecthashsize) 119 struct inpcbtable *table; 120 int bindhashsize, connecthashsize; 121 { 122 static int inpcb_pool_initialized; 123 124 if (inpcb_pool_initialized == 0) { 125 pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0, 126 "inpcbpl", 0, NULL, NULL, M_PCB); 127 inpcb_pool_initialized = 1; 128 } 129 130 CIRCLEQ_INIT(&table->inpt_queue); 131 table->inpt_bindhashtbl = 132 hashinit(bindhashsize, M_PCB, M_WAITOK, &table->inpt_bindhash); 133 table->inpt_connecthashtbl = 134 hashinit(connecthashsize, M_PCB, M_WAITOK, &table->inpt_connecthash); 135 table->inpt_lastlow = IPPORT_RESERVEDMAX; 136 table->inpt_lastport = (u_int16_t)anonportmax; 137 } 138 139 int 140 in_pcballoc(so, v) 141 struct socket *so; 142 void *v; 143 { 144 struct inpcbtable *table = v; 145 register struct inpcb *inp; 146 int s; 147 148 inp = pool_get(&inpcb_pool, PR_NOWAIT); 149 if (inp == NULL) 150 return (ENOBUFS); 151 bzero((caddr_t)inp, sizeof(*inp)); 152 inp->inp_table = table; 153 inp->inp_socket = so; 154 inp->inp_errormtu = -1; 155 so->so_pcb = inp; 156 s = splnet(); 157 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 158 in_pcbstate(inp, INP_ATTACHED); 159 splx(s); 160 return (0); 161 } 162 163 int 164 in_pcbbind(v, nam, p) 165 void *v; 166 struct mbuf *nam; 167 struct proc *p; 168 { 169 register struct inpcb *inp = v; 170 register struct socket *so = inp->inp_socket; 171 register struct inpcbtable *table = inp->inp_table; 172 register struct sockaddr_in *sin; 173 u_int16_t lport = 0; 174 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 175 #ifndef IPNOPRIVPORTS 176 int error; 177 #endif 178 179 if (in_ifaddr.tqh_first == 0) 180 return (EADDRNOTAVAIL); 181 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 182 return (EINVAL); 183 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 184 wild = 1; 185 if (nam == 0) 186 goto noname; 187 sin = mtod(nam, struct sockaddr_in *); 188 if (nam->m_len != sizeof (*sin)) 189 return (EINVAL); 190 #ifdef notdef 191 /* 192 * We should check the family, but old programs 193 * incorrectly fail to initialize it. 194 */ 195 if (sin->sin_family != AF_INET) 196 return (EAFNOSUPPORT); 197 #endif 198 lport = sin->sin_port; 199 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 200 /* 201 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 202 * allow complete duplication of binding if 203 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 204 * and a multicast address is bound on both 205 * new and duplicated sockets. 206 */ 207 if (so->so_options & SO_REUSEADDR) 208 reuseport = SO_REUSEADDR|SO_REUSEPORT; 209 } else if (!in_nullhost(sin->sin_addr)) { 210 sin->sin_port = 0; /* yech... */ 211 if (ifa_ifwithaddr(sintosa(sin)) == 0) 212 return (EADDRNOTAVAIL); 213 } 214 if (lport) { 215 struct inpcb *t; 216 #ifndef IPNOPRIVPORTS 217 /* GROSS */ 218 if (ntohs(lport) < IPPORT_RESERVED && 219 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 220 return (EACCES); 221 #endif 222 if (so->so_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { 223 t = in_pcblookup_port(table, sin->sin_addr, lport, 1); 224 /* 225 * XXX: investigate ramifications of loosening this 226 * restriction so that as long as both ports have 227 * SO_REUSEPORT allow the bind 228 */ 229 if (t && 230 (!in_nullhost(sin->sin_addr) || 231 !in_nullhost(t->inp_laddr) || 232 (t->inp_socket->so_options & SO_REUSEPORT) == 0) 233 && (so->so_uid != t->inp_socket->so_uid)) { 234 return (EADDRINUSE); 235 } 236 } 237 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 238 if (t && (reuseport & t->inp_socket->so_options) == 0) 239 return (EADDRINUSE); 240 } 241 inp->inp_laddr = sin->sin_addr; 242 243 noname: 244 if (lport == 0) { 245 int cnt; 246 u_int16_t min, max; 247 u_int16_t *lastport; 248 249 if (inp->inp_flags & INP_LOWPORT) { 250 #ifndef IPNOPRIVPORTS 251 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 252 return (EACCES); 253 #endif 254 min = IPPORT_RESERVEDMIN; 255 max = IPPORT_RESERVEDMAX; 256 lastport = &table->inpt_lastlow; 257 } else { 258 min = anonportmin; 259 max = anonportmax; 260 lastport = &table->inpt_lastport; 261 } 262 if (min > max) { /* sanity check */ 263 u_int16_t swp; 264 265 swp = min; 266 min = max; 267 max = swp; 268 } 269 270 lport = *lastport - 1; 271 for (cnt = max - min + 1; cnt; cnt--, lport--) { 272 if (lport < min || lport > max) 273 lport = max; 274 if (!in_pcblookup_port(table, inp->inp_laddr, 275 htons(lport), 1)) 276 goto found; 277 } 278 if (!in_nullhost(inp->inp_laddr)) 279 inp->inp_laddr.s_addr = INADDR_ANY; 280 return (EAGAIN); 281 found: 282 inp->inp_flags |= INP_ANONPORT; 283 *lastport = lport; 284 lport = htons(lport); 285 } 286 inp->inp_lport = lport; 287 in_pcbstate(inp, INP_BOUND); 288 return (0); 289 } 290 291 /* 292 * Connect from a socket to a specified address. 293 * Both address and port must be specified in argument sin. 294 * If don't have a local address for this socket yet, 295 * then pick one. 296 */ 297 int 298 in_pcbconnect(v, nam) 299 register void *v; 300 struct mbuf *nam; 301 { 302 register struct inpcb *inp = v; 303 struct in_ifaddr *ia; 304 struct sockaddr_in *ifaddr = NULL; 305 register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 306 int error; 307 308 if (nam->m_len != sizeof (*sin)) 309 return (EINVAL); 310 if (sin->sin_family != AF_INET) 311 return (EAFNOSUPPORT); 312 if (sin->sin_port == 0) 313 return (EADDRNOTAVAIL); 314 if (in_ifaddr.tqh_first != 0) { 315 /* 316 * If the destination address is INADDR_ANY, 317 * use any local address (likely loopback). 318 * If the supplied address is INADDR_BROADCAST, 319 * use the broadcast address of an interface 320 * which supports broadcast. (loopback does not) 321 */ 322 323 if (in_nullhost(sin->sin_addr)) 324 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 325 else if (sin->sin_addr.s_addr == INADDR_BROADCAST) 326 for (ia = in_ifaddr.tqh_first; ia != NULL; 327 ia = ia->ia_list.tqe_next) 328 if (ia->ia_ifp->if_flags & IFF_BROADCAST) { 329 sin->sin_addr = ia->ia_broadaddr.sin_addr; 330 break; 331 } 332 } 333 /* 334 * If we haven't bound which network number to use as ours, 335 * we will use the number of the outgoing interface. 336 * This depends on having done a routing lookup, which 337 * we will probably have to do anyway, so we might 338 * as well do it now. On the other hand if we are 339 * sending to multiple destinations we may have already 340 * done the lookup, so see if we can use the route 341 * from before. In any case, we only 342 * chose a port number once, even if sending to multiple 343 * destinations. 344 */ 345 if (in_nullhost(inp->inp_laddr)) { 346 register struct route *ro; 347 348 ia = (struct in_ifaddr *)0; 349 /* 350 * If route is known or can be allocated now, 351 * our src addr is taken from the i/f, else punt. 352 */ 353 ro = &inp->inp_route; 354 if (ro->ro_rt && 355 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 356 sin->sin_addr) || 357 inp->inp_socket->so_options & SO_DONTROUTE)) { 358 RTFREE(ro->ro_rt); 359 ro->ro_rt = (struct rtentry *)0; 360 } 361 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 362 (ro->ro_rt == (struct rtentry *)0 || 363 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 364 /* No route yet, so try to acquire one */ 365 ro->ro_dst.sa_family = AF_INET; 366 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 367 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 368 rtalloc(ro); 369 } 370 /* 371 * If we found a route, use the address 372 * corresponding to the outgoing interface 373 * unless it is the loopback (in case a route 374 * to our address on another net goes to loopback). 375 * 376 * XXX Is this still true? Do we care? 377 */ 378 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 379 ia = ifatoia(ro->ro_rt->rt_ifa); 380 if (ia == 0) { 381 u_int16_t fport = sin->sin_port; 382 383 sin->sin_port = 0; 384 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 385 sin->sin_port = fport; 386 if (ia == 0) 387 /* Find 1st non-loopback AF_INET address */ 388 for (ia = in_ifaddr.tqh_first ; ia != NULL ; 389 ia = ia->ia_list.tqe_next) 390 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) 391 break; 392 if (ia == 0) 393 return (EADDRNOTAVAIL); 394 } 395 /* 396 * If the destination address is multicast and an outgoing 397 * interface has been set as a multicast option, use the 398 * address of that interface as our source address. 399 */ 400 if (IN_MULTICAST(sin->sin_addr.s_addr) && 401 inp->inp_moptions != NULL) { 402 struct ip_moptions *imo; 403 struct ifnet *ifp; 404 405 imo = inp->inp_moptions; 406 if (imo->imo_multicast_ifp != NULL) { 407 ifp = imo->imo_multicast_ifp; 408 IFP_TO_IA(ifp, ia); /* XXX */ 409 if (ia == 0) 410 return (EADDRNOTAVAIL); 411 } 412 } 413 ifaddr = satosin(&ia->ia_addr); 414 } 415 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 416 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 417 inp->inp_lport) != 0) 418 return (EADDRINUSE); 419 if (in_nullhost(inp->inp_laddr)) { 420 if (inp->inp_lport == 0) { 421 error = in_pcbbind(inp, (struct mbuf *)0, 422 (struct proc *)0); 423 /* 424 * This used to ignore the return value 425 * completely, but we need to check for 426 * ephemeral port shortage. 427 * XXX Should we check for other errors, too? 428 */ 429 if (error == EAGAIN) 430 return (error); 431 } 432 inp->inp_laddr = ifaddr->sin_addr; 433 } 434 inp->inp_faddr = sin->sin_addr; 435 inp->inp_fport = sin->sin_port; 436 in_pcbstate(inp, INP_CONNECTED); 437 return (0); 438 } 439 440 void 441 in_pcbdisconnect(v) 442 void *v; 443 { 444 struct inpcb *inp = v; 445 446 inp->inp_faddr = zeroin_addr; 447 inp->inp_fport = 0; 448 in_pcbstate(inp, INP_BOUND); 449 if (inp->inp_socket->so_state & SS_NOFDREF) 450 in_pcbdetach(inp); 451 } 452 453 void 454 in_pcbdetach(v) 455 void *v; 456 { 457 struct inpcb *inp = v; 458 struct socket *so = inp->inp_socket; 459 int s; 460 461 so->so_pcb = 0; 462 sofree(so); 463 if (inp->inp_options) 464 (void)m_free(inp->inp_options); 465 if (inp->inp_route.ro_rt) 466 rtfree(inp->inp_route.ro_rt); 467 ip_freemoptions(inp->inp_moptions); 468 s = splnet(); 469 in_pcbstate(inp, INP_ATTACHED); 470 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 471 splx(s); 472 pool_put(&inpcb_pool, inp); 473 } 474 475 void 476 in_setsockaddr(inp, nam) 477 register struct inpcb *inp; 478 struct mbuf *nam; 479 { 480 register struct sockaddr_in *sin; 481 482 nam->m_len = sizeof (*sin); 483 sin = mtod(nam, struct sockaddr_in *); 484 bzero((caddr_t)sin, sizeof (*sin)); 485 sin->sin_family = AF_INET; 486 sin->sin_len = sizeof(*sin); 487 sin->sin_port = inp->inp_lport; 488 sin->sin_addr = inp->inp_laddr; 489 } 490 491 void 492 in_setpeeraddr(inp, nam) 493 struct inpcb *inp; 494 struct mbuf *nam; 495 { 496 register struct sockaddr_in *sin; 497 498 nam->m_len = sizeof (*sin); 499 sin = mtod(nam, struct sockaddr_in *); 500 bzero((caddr_t)sin, sizeof (*sin)); 501 sin->sin_family = AF_INET; 502 sin->sin_len = sizeof(*sin); 503 sin->sin_port = inp->inp_fport; 504 sin->sin_addr = inp->inp_faddr; 505 } 506 507 /* 508 * Pass some notification to all connections of a protocol 509 * associated with address dst. The local address and/or port numbers 510 * may be specified to limit the search. The "usual action" will be 511 * taken, depending on the ctlinput cmd. The caller must filter any 512 * cmds that are uninteresting (e.g., no error in the map). 513 * Call the protocol specific routine (if any) to report 514 * any errors for each matching socket. 515 * 516 * Must be called at splsoftnet. 517 */ 518 int 519 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 520 struct inpcbtable *table; 521 struct in_addr faddr, laddr; 522 u_int fport_arg, lport_arg; 523 int errno; 524 void (*notify) __P((struct inpcb *, int)); 525 { 526 struct inpcbhead *head; 527 register struct inpcb *inp, *ninp; 528 u_int16_t fport = fport_arg, lport = lport_arg; 529 int nmatch; 530 531 if (in_nullhost(faddr) || notify == 0) 532 return (0); 533 534 nmatch = 0; 535 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 536 for (inp = head->lh_first; inp != NULL; inp = ninp) { 537 ninp = inp->inp_hash.le_next; 538 if (in_hosteq(inp->inp_faddr, faddr) && 539 inp->inp_fport == fport && 540 inp->inp_lport == lport && 541 in_hosteq(inp->inp_laddr, laddr)) { 542 (*notify)(inp, errno); 543 nmatch++; 544 } 545 } 546 return (nmatch); 547 } 548 549 void 550 in_pcbnotifyall(table, faddr, errno, notify) 551 struct inpcbtable *table; 552 struct in_addr faddr; 553 int errno; 554 void (*notify) __P((struct inpcb *, int)); 555 { 556 register struct inpcb *inp, *ninp; 557 558 if (in_nullhost(faddr) || notify == 0) 559 return; 560 561 for (inp = table->inpt_queue.cqh_first; 562 inp != (struct inpcb *)&table->inpt_queue; 563 inp = ninp) { 564 ninp = inp->inp_queue.cqe_next; 565 if (in_hosteq(inp->inp_faddr, faddr)) 566 (*notify)(inp, errno); 567 } 568 } 569 570 /* 571 * Check for alternatives when higher level complains 572 * about service problems. For now, invalidate cached 573 * routing information. If the route was created dynamically 574 * (by a redirect), time to try a default gateway again. 575 */ 576 void 577 in_losing(inp) 578 struct inpcb *inp; 579 { 580 register struct rtentry *rt; 581 struct rt_addrinfo info; 582 583 if ((rt = inp->inp_route.ro_rt)) { 584 inp->inp_route.ro_rt = 0; 585 bzero((caddr_t)&info, sizeof(info)); 586 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 587 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 588 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 589 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 590 if (rt->rt_flags & RTF_DYNAMIC) 591 (void) rtrequest(RTM_DELETE, rt_key(rt), 592 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 593 (struct rtentry **)0); 594 else 595 /* 596 * A new route can be allocated 597 * the next time output is attempted. 598 */ 599 rtfree(rt); 600 } 601 } 602 603 /* 604 * After a routing change, flush old routing 605 * and allocate a (hopefully) better one. 606 */ 607 void 608 in_rtchange(inp, errno) 609 register struct inpcb *inp; 610 int errno; 611 { 612 613 if (inp->inp_route.ro_rt) { 614 rtfree(inp->inp_route.ro_rt); 615 inp->inp_route.ro_rt = 0; 616 /* 617 * A new route can be allocated the next time 618 * output is attempted. 619 */ 620 } 621 /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 622 } 623 624 struct inpcb * 625 in_pcblookup_port(table, laddr, lport_arg, lookup_wildcard) 626 struct inpcbtable *table; 627 struct in_addr laddr; 628 u_int lport_arg; 629 int lookup_wildcard; 630 { 631 register struct inpcb *inp, *match = 0; 632 int matchwild = 3, wildcard; 633 u_int16_t lport = lport_arg; 634 635 for (inp = table->inpt_queue.cqh_first; 636 inp != (struct inpcb *)&table->inpt_queue; 637 inp = inp->inp_queue.cqe_next) { 638 if (inp->inp_lport != lport) 639 continue; 640 wildcard = 0; 641 if (!in_nullhost(inp->inp_faddr)) 642 wildcard++; 643 if (in_nullhost(inp->inp_laddr)) { 644 if (!in_nullhost(laddr)) 645 wildcard++; 646 } else { 647 if (in_nullhost(laddr)) 648 wildcard++; 649 else { 650 if (!in_hosteq(inp->inp_laddr, laddr)) 651 continue; 652 } 653 } 654 if (wildcard && !lookup_wildcard) 655 continue; 656 if (wildcard < matchwild) { 657 match = inp; 658 matchwild = wildcard; 659 if (matchwild == 0) 660 break; 661 } 662 } 663 return (match); 664 } 665 666 #ifdef DIAGNOSTIC 667 int in_pcbnotifymiss = 0; 668 #endif 669 670 struct inpcb * 671 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 672 struct inpcbtable *table; 673 struct in_addr faddr, laddr; 674 u_int fport_arg, lport_arg; 675 { 676 struct inpcbhead *head; 677 register struct inpcb *inp; 678 u_int16_t fport = fport_arg, lport = lport_arg; 679 680 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 681 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 682 if (in_hosteq(inp->inp_faddr, faddr) && 683 inp->inp_fport == fport && 684 inp->inp_lport == lport && 685 in_hosteq(inp->inp_laddr, laddr)) 686 goto out; 687 } 688 #ifdef DIAGNOSTIC 689 if (in_pcbnotifymiss) { 690 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 691 ntohl(faddr.s_addr), ntohs(fport), 692 ntohl(laddr.s_addr), ntohs(lport)); 693 } 694 #endif 695 return (0); 696 697 out: 698 /* Move this PCB to the head of hash chain. */ 699 if (inp != head->lh_first) { 700 LIST_REMOVE(inp, inp_hash); 701 LIST_INSERT_HEAD(head, inp, inp_hash); 702 } 703 return (inp); 704 } 705 706 struct inpcb * 707 in_pcblookup_bind(table, laddr, lport_arg) 708 struct inpcbtable *table; 709 struct in_addr laddr; 710 u_int lport_arg; 711 { 712 struct inpcbhead *head; 713 register struct inpcb *inp; 714 u_int16_t lport = lport_arg; 715 716 head = INPCBHASH_BIND(table, laddr, lport); 717 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 718 if (inp->inp_lport == lport && 719 in_hosteq(inp->inp_laddr, laddr)) 720 goto out; 721 } 722 head = INPCBHASH_BIND(table, zeroin_addr, lport); 723 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 724 if (inp->inp_lport == lport && 725 in_hosteq(inp->inp_laddr, zeroin_addr)) 726 goto out; 727 } 728 #ifdef DIAGNOSTIC 729 if (in_pcbnotifymiss) { 730 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 731 ntohl(laddr.s_addr), ntohs(lport)); 732 } 733 #endif 734 return (0); 735 736 out: 737 /* Move this PCB to the head of hash chain. */ 738 if (inp != head->lh_first) { 739 LIST_REMOVE(inp, inp_hash); 740 LIST_INSERT_HEAD(head, inp, inp_hash); 741 } 742 return (inp); 743 } 744 745 void 746 in_pcbstate(inp, state) 747 struct inpcb *inp; 748 int state; 749 { 750 751 if (inp->inp_state > INP_ATTACHED) 752 LIST_REMOVE(inp, inp_hash); 753 754 switch (state) { 755 case INP_BOUND: 756 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 757 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 758 break; 759 case INP_CONNECTED: 760 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 761 inp->inp_faddr, inp->inp_fport, 762 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 763 break; 764 } 765 766 inp->inp_state = state; 767 } 768 769 struct rtentry * 770 in_pcbrtentry(inp) 771 struct inpcb *inp; 772 { 773 struct route *ro; 774 775 ro = &inp->inp_route; 776 777 if (ro->ro_rt == NULL) { 778 /* 779 * No route yet, so try to acquire one. 780 */ 781 if (!in_nullhost(inp->inp_faddr)) { 782 ro->ro_dst.sa_family = AF_INET; 783 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 784 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 785 rtalloc(ro); 786 } 787 } 788 return (ro->ro_rt); 789 } 790
Indexes created Tue Sep 23 01:09:51 GMT 2025