in_pcb.c revision 1.45
1 /* $NetBSD: in_pcb.c,v 1.45 1998/01/07 22:51:23 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1991, 1993, 1995 5 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/ioctl.h> 46 #include <sys/errno.h> 47 #include <sys/time.h> 48 #include <sys/proc.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/in_pcb.h> 57 #include <netinet/in_var.h> 58 #include <netinet/ip_var.h> 59 60 struct in_addr zeroin_addr; 61 62 #define INPCBHASH_BIND(table, laddr, lport) \ 63 &(table)->inpt_bindhashtbl[ \ 64 ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] 65 #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 66 &(table)->inpt_connecthashtbl[ \ 67 ((ntohl((faddr).s_addr) + ntohs(fport)) + \ 68 (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] 69 70 struct inpcb * 71 in_pcblookup_port __P((struct inpcbtable *, 72 struct in_addr, u_int, int)); 73 74 int anonportmin = IPPORT_ANONMIN; 75 int anonportmax = IPPORT_ANONMAX; 76 77 void 78 in_pcbinit(table, bindhashsize, connecthashsize) 79 struct inpcbtable *table; 80 int bindhashsize, connecthashsize; 81 { 82 83 CIRCLEQ_INIT(&table->inpt_queue); 84 table->inpt_bindhashtbl = 85 hashinit(bindhashsize, M_PCB, &table->inpt_bindhash); 86 table->inpt_connecthashtbl = 87 hashinit(connecthashsize, M_PCB, &table->inpt_connecthash); 88 table->inpt_lastport = (u_int16_t)anonportmin; 89 } 90 91 int 92 in_pcballoc(so, v) 93 struct socket *so; 94 void *v; 95 { 96 struct inpcbtable *table = v; 97 register struct inpcb *inp; 98 int s; 99 100 MALLOC(inp, struct inpcb *, sizeof(*inp), M_PCB, M_WAITOK); 101 if (inp == NULL) 102 return (ENOBUFS); 103 bzero((caddr_t)inp, sizeof(*inp)); 104 inp->inp_table = table; 105 inp->inp_socket = so; 106 inp->inp_errormtu = -1; 107 so->so_pcb = inp; 108 s = splnet(); 109 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 110 in_pcbstate(inp, INP_ATTACHED); 111 splx(s); 112 return (0); 113 } 114 115 int 116 in_pcbbind(v, nam, p) 117 void *v; 118 struct mbuf *nam; 119 struct proc *p; 120 { 121 register struct inpcb *inp = v; 122 register struct socket *so = inp->inp_socket; 123 register struct inpcbtable *table = inp->inp_table; 124 register struct sockaddr_in *sin; 125 u_int16_t lport = 0; 126 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 127 #ifndef IPNOPRIVPORTS 128 int error; 129 #endif 130 131 if (in_ifaddr.tqh_first == 0) 132 return (EADDRNOTAVAIL); 133 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 134 return (EINVAL); 135 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 136 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 137 (so->so_options & SO_ACCEPTCONN) == 0)) 138 wild = INPLOOKUP_WILDCARD; 139 if (nam == 0) 140 goto noname; 141 sin = mtod(nam, struct sockaddr_in *); 142 if (nam->m_len != sizeof (*sin)) 143 return (EINVAL); 144 #ifdef notdef 145 /* 146 * We should check the family, but old programs 147 * incorrectly fail to initialize it. 148 */ 149 if (sin->sin_family != AF_INET) 150 return (EAFNOSUPPORT); 151 #endif 152 lport = sin->sin_port; 153 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 154 /* 155 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 156 * allow complete duplication of binding if 157 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 158 * and a multicast address is bound on both 159 * new and duplicated sockets. 160 */ 161 if (so->so_options & SO_REUSEADDR) 162 reuseport = SO_REUSEADDR|SO_REUSEPORT; 163 } else if (!in_nullhost(sin->sin_addr)) { 164 sin->sin_port = 0; /* yech... */ 165 if (ifa_ifwithaddr(sintosa(sin)) == 0) 166 return (EADDRNOTAVAIL); 167 } 168 if (lport) { 169 struct inpcb *t; 170 #ifndef IPNOPRIVPORTS 171 /* GROSS */ 172 if (ntohs(lport) < IPPORT_RESERVED && 173 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 174 return (EACCES); 175 #endif 176 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 177 if (t && (reuseport & t->inp_socket->so_options) == 0) 178 return (EADDRINUSE); 179 } 180 inp->inp_laddr = sin->sin_addr; 181 182 noname: 183 if (lport == 0) { 184 int cnt 185 u_int16_t min, max; 186 u_int16_t *lastport; 187 188 if (inp->inp_flags & INP_LOWPORT) { 189 #ifndef IPNOPRIVPORTS 190 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) 191 return (EACCES); 192 #endif 193 min = IPPORT_RESERVEDMIN; 194 max = IPPORT_RESERVEDMAX; 195 lastport = &table->inpt_lastlow; 196 } else { 197 min = anonportmin; 198 max = anonportmax; 199 lastport = &table->inpt_lastport; 200 } 201 if (min > max) { /* sanity check */ 202 u_int16_t swp; 203 204 swp = min; 205 min = max; 206 max = swp; 207 } 208 209 lport = *lastport + 1; 210 for (cnt = max - min + 1; cnt; cnt--, lport++) { 211 if (lport < min || lport > max) 212 lport = min; 213 if (!in_pcblookup_port(table, inp->inp_laddr, 214 htons(lport), wild)) 215 goto found; 216 } 217 if (!in_nullhost(inp->inp_laddr)) 218 inp->inp_laddr.s_addr = INADDR_ANY; 219 return (EAGAIN); 220 found: 221 inp->inp_flags |= INP_ANONPORT; 222 *lastport = lport; 223 lport = htons(lport); 224 } 225 inp->inp_lport = lport; 226 in_pcbstate(inp, INP_BOUND); 227 return (0); 228 } 229 230 /* 231 * Connect from a socket to a specified address. 232 * Both address and port must be specified in argument sin. 233 * If don't have a local address for this socket yet, 234 * then pick one. 235 */ 236 int 237 in_pcbconnect(v, nam) 238 register void *v; 239 struct mbuf *nam; 240 { 241 register struct inpcb *inp = v; 242 struct in_ifaddr *ia; 243 struct sockaddr_in *ifaddr = NULL; 244 register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 245 int error; 246 247 if (nam->m_len != sizeof (*sin)) 248 return (EINVAL); 249 if (sin->sin_family != AF_INET) 250 return (EAFNOSUPPORT); 251 if (sin->sin_port == 0) 252 return (EADDRNOTAVAIL); 253 if (in_ifaddr.tqh_first != 0) { 254 /* 255 * If the destination address is INADDR_ANY, 256 * use the primary local address. 257 * If the supplied address is INADDR_BROADCAST, 258 * and the primary interface supports broadcast, 259 * choose the broadcast address for that interface. 260 */ 261 if (in_nullhost(sin->sin_addr)) 262 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 263 else if (sin->sin_addr.s_addr == INADDR_BROADCAST && 264 (in_ifaddr.tqh_first->ia_ifp->if_flags & IFF_BROADCAST)) 265 sin->sin_addr = in_ifaddr.tqh_first->ia_broadaddr.sin_addr; 266 } 267 /* 268 * If we haven't bound which network number to use as ours, 269 * we will use the number of the outgoing interface. 270 * This depends on having done a routing lookup, which 271 * we will probably have to do anyway, so we might 272 * as well do it now. On the other hand if we are 273 * sending to multiple destinations we may have already 274 * done the lookup, so see if we can use the route 275 * from before. In any case, we only 276 * chose a port number once, even if sending to multiple 277 * destinations. 278 */ 279 if (in_nullhost(inp->inp_laddr)) { 280 register struct route *ro; 281 282 ia = (struct in_ifaddr *)0; 283 /* 284 * If route is known or can be allocated now, 285 * our src addr is taken from the i/f, else punt. 286 */ 287 ro = &inp->inp_route; 288 if (ro->ro_rt && 289 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 290 sin->sin_addr) || 291 inp->inp_socket->so_options & SO_DONTROUTE)) { 292 RTFREE(ro->ro_rt); 293 ro->ro_rt = (struct rtentry *)0; 294 } 295 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 296 (ro->ro_rt == (struct rtentry *)0 || 297 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 298 /* No route yet, so try to acquire one */ 299 ro->ro_dst.sa_family = AF_INET; 300 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 301 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 302 rtalloc(ro); 303 } 304 /* 305 * If we found a route, use the address 306 * corresponding to the outgoing interface 307 * unless it is the loopback (in case a route 308 * to our address on another net goes to loopback). 309 */ 310 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 311 ia = ifatoia(ro->ro_rt->rt_ifa); 312 if (ia == 0) { 313 u_int16_t fport = sin->sin_port; 314 315 sin->sin_port = 0; 316 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 317 sin->sin_port = fport; 318 if (ia == 0) 319 ia = in_ifaddr.tqh_first; 320 if (ia == 0) 321 return (EADDRNOTAVAIL); 322 } 323 /* 324 * If the destination address is multicast and an outgoing 325 * interface has been set as a multicast option, use the 326 * address of that interface as our source address. 327 */ 328 if (IN_MULTICAST(sin->sin_addr.s_addr) && 329 inp->inp_moptions != NULL) { 330 struct ip_moptions *imo; 331 struct ifnet *ifp; 332 333 imo = inp->inp_moptions; 334 if (imo->imo_multicast_ifp != NULL) { 335 ifp = imo->imo_multicast_ifp; 336 for (ia = in_ifaddr.tqh_first; ia != 0; 337 ia = ia->ia_list.tqe_next) 338 if (ia->ia_ifp == ifp) 339 break; 340 if (ia == 0) 341 return (EADDRNOTAVAIL); 342 } 343 } 344 ifaddr = satosin(&ia->ia_addr); 345 } 346 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 347 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 348 inp->inp_lport) != 0) 349 return (EADDRINUSE); 350 if (in_nullhost(inp->inp_laddr)) { 351 if (inp->inp_lport == 0) { 352 error = in_pcbbind(inp, (struct mbuf *)0, 353 (struct proc *)0); 354 /* 355 * This used to ignore the return value 356 * completely, but we need to check for 357 * ephemeral port shortage. 358 * XXX Should we check for other errors, too? 359 */ 360 if (error == EAGAIN) 361 return (error); 362 } 363 inp->inp_laddr = ifaddr->sin_addr; 364 } 365 inp->inp_faddr = sin->sin_addr; 366 inp->inp_fport = sin->sin_port; 367 in_pcbstate(inp, INP_CONNECTED); 368 return (0); 369 } 370 371 void 372 in_pcbdisconnect(v) 373 void *v; 374 { 375 struct inpcb *inp = v; 376 377 inp->inp_faddr = zeroin_addr; 378 inp->inp_fport = 0; 379 in_pcbstate(inp, INP_BOUND); 380 if (inp->inp_socket->so_state & SS_NOFDREF) 381 in_pcbdetach(inp); 382 } 383 384 void 385 in_pcbdetach(v) 386 void *v; 387 { 388 struct inpcb *inp = v; 389 struct socket *so = inp->inp_socket; 390 int s; 391 392 so->so_pcb = 0; 393 sofree(so); 394 if (inp->inp_options) 395 (void)m_free(inp->inp_options); 396 if (inp->inp_route.ro_rt) 397 rtfree(inp->inp_route.ro_rt); 398 ip_freemoptions(inp->inp_moptions); 399 s = splnet(); 400 in_pcbstate(inp, INP_ATTACHED); 401 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 402 splx(s); 403 FREE(inp, M_PCB); 404 } 405 406 void 407 in_setsockaddr(inp, nam) 408 register struct inpcb *inp; 409 struct mbuf *nam; 410 { 411 register struct sockaddr_in *sin; 412 413 nam->m_len = sizeof (*sin); 414 sin = mtod(nam, struct sockaddr_in *); 415 bzero((caddr_t)sin, sizeof (*sin)); 416 sin->sin_family = AF_INET; 417 sin->sin_len = sizeof(*sin); 418 sin->sin_port = inp->inp_lport; 419 sin->sin_addr = inp->inp_laddr; 420 } 421 422 void 423 in_setpeeraddr(inp, nam) 424 struct inpcb *inp; 425 struct mbuf *nam; 426 { 427 register struct sockaddr_in *sin; 428 429 nam->m_len = sizeof (*sin); 430 sin = mtod(nam, struct sockaddr_in *); 431 bzero((caddr_t)sin, sizeof (*sin)); 432 sin->sin_family = AF_INET; 433 sin->sin_len = sizeof(*sin); 434 sin->sin_port = inp->inp_fport; 435 sin->sin_addr = inp->inp_faddr; 436 } 437 438 /* 439 * Pass some notification to all connections of a protocol 440 * associated with address dst. The local address and/or port numbers 441 * may be specified to limit the search. The "usual action" will be 442 * taken, depending on the ctlinput cmd. The caller must filter any 443 * cmds that are uninteresting (e.g., no error in the map). 444 * Call the protocol specific routine (if any) to report 445 * any errors for each matching socket. 446 * 447 * Must be called at splsoftnet. 448 */ 449 int 450 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 451 struct inpcbtable *table; 452 struct in_addr faddr, laddr; 453 u_int fport_arg, lport_arg; 454 int errno; 455 void (*notify) __P((struct inpcb *, int)); 456 { 457 struct inpcbhead *head; 458 register struct inpcb *inp, *ninp; 459 u_int16_t fport = fport_arg, lport = lport_arg; 460 int nmatch; 461 462 if (in_nullhost(faddr) || notify == 0) 463 return (0); 464 465 nmatch = 0; 466 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 467 for (inp = head->lh_first; inp != NULL; inp = ninp) { 468 ninp = inp->inp_hash.le_next; 469 if (in_hosteq(inp->inp_faddr, faddr) && 470 inp->inp_fport == fport && 471 inp->inp_lport == lport && 472 in_hosteq(inp->inp_laddr, laddr)) { 473 (*notify)(inp, errno); 474 nmatch++; 475 } 476 } 477 return (nmatch); 478 } 479 480 void 481 in_pcbnotifyall(table, faddr, errno, notify) 482 struct inpcbtable *table; 483 struct in_addr faddr; 484 int errno; 485 void (*notify) __P((struct inpcb *, int)); 486 { 487 register struct inpcb *inp, *ninp; 488 489 if (in_nullhost(faddr) || notify == 0) 490 return; 491 492 for (inp = table->inpt_queue.cqh_first; 493 inp != (struct inpcb *)&table->inpt_queue; 494 inp = ninp) { 495 ninp = inp->inp_queue.cqe_next; 496 if (in_hosteq(inp->inp_faddr, faddr)) 497 (*notify)(inp, errno); 498 } 499 } 500 501 /* 502 * Check for alternatives when higher level complains 503 * about service problems. For now, invalidate cached 504 * routing information. If the route was created dynamically 505 * (by a redirect), time to try a default gateway again. 506 */ 507 void 508 in_losing(inp) 509 struct inpcb *inp; 510 { 511 register struct rtentry *rt; 512 struct rt_addrinfo info; 513 514 if ((rt = inp->inp_route.ro_rt)) { 515 inp->inp_route.ro_rt = 0; 516 bzero((caddr_t)&info, sizeof(info)); 517 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 518 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 519 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 520 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 521 if (rt->rt_flags & RTF_DYNAMIC) 522 (void) rtrequest(RTM_DELETE, rt_key(rt), 523 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 524 (struct rtentry **)0); 525 else 526 /* 527 * A new route can be allocated 528 * the next time output is attempted. 529 */ 530 rtfree(rt); 531 } 532 } 533 534 /* 535 * After a routing change, flush old routing 536 * and allocate a (hopefully) better one. 537 */ 538 void 539 in_rtchange(inp, errno) 540 register struct inpcb *inp; 541 int errno; 542 { 543 544 if (inp->inp_route.ro_rt) { 545 rtfree(inp->inp_route.ro_rt); 546 inp->inp_route.ro_rt = 0; 547 /* 548 * A new route can be allocated the next time 549 * output is attempted. 550 */ 551 } 552 /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 553 } 554 555 struct inpcb * 556 in_pcblookup_port(table, laddr, lport_arg, flags) 557 struct inpcbtable *table; 558 struct in_addr laddr; 559 u_int lport_arg; 560 int flags; 561 { 562 register struct inpcb *inp, *match = 0; 563 int matchwild = 3, wildcard; 564 u_int16_t lport = lport_arg; 565 566 for (inp = table->inpt_queue.cqh_first; 567 inp != (struct inpcb *)&table->inpt_queue; 568 inp = inp->inp_queue.cqe_next) { 569 if (inp->inp_lport != lport) 570 continue; 571 wildcard = 0; 572 if (!in_nullhost(inp->inp_faddr)) 573 wildcard++; 574 if (in_nullhost(inp->inp_laddr)) { 575 if (!in_nullhost(laddr)) 576 wildcard++; 577 } else { 578 if (in_nullhost(laddr)) 579 wildcard++; 580 else { 581 if (!in_hosteq(inp->inp_laddr, laddr)) 582 continue; 583 } 584 } 585 if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) 586 continue; 587 if (wildcard < matchwild) { 588 match = inp; 589 matchwild = wildcard; 590 if (matchwild == 0) 591 break; 592 } 593 } 594 return (match); 595 } 596 597 #ifdef DIAGNOSTIC 598 int in_pcbnotifymiss = 0; 599 #endif 600 601 struct inpcb * 602 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 603 struct inpcbtable *table; 604 struct in_addr faddr, laddr; 605 u_int fport_arg, lport_arg; 606 { 607 struct inpcbhead *head; 608 register struct inpcb *inp; 609 u_int16_t fport = fport_arg, lport = lport_arg; 610 611 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 612 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 613 if (in_hosteq(inp->inp_faddr, faddr) && 614 inp->inp_fport == fport && 615 inp->inp_lport == lport && 616 in_hosteq(inp->inp_laddr, laddr)) 617 goto out; 618 } 619 #ifdef DIAGNOSTIC 620 if (in_pcbnotifymiss) { 621 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 622 ntohl(faddr.s_addr), ntohs(fport), 623 ntohl(laddr.s_addr), ntohs(lport)); 624 } 625 #endif 626 return (0); 627 628 out: 629 /* Move this PCB to the head of hash chain. */ 630 if (inp != head->lh_first) { 631 LIST_REMOVE(inp, inp_hash); 632 LIST_INSERT_HEAD(head, inp, inp_hash); 633 } 634 return (inp); 635 } 636 637 struct inpcb * 638 in_pcblookup_bind(table, laddr, lport_arg) 639 struct inpcbtable *table; 640 struct in_addr laddr; 641 u_int lport_arg; 642 { 643 struct inpcbhead *head; 644 register struct inpcb *inp; 645 u_int16_t lport = lport_arg; 646 647 head = INPCBHASH_BIND(table, laddr, lport); 648 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 649 if (inp->inp_lport == lport && 650 in_hosteq(inp->inp_laddr, laddr)) 651 goto out; 652 } 653 head = INPCBHASH_BIND(table, zeroin_addr, lport); 654 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 655 if (inp->inp_lport == lport && 656 in_hosteq(inp->inp_laddr, zeroin_addr)) 657 goto out; 658 } 659 #ifdef DIAGNOSTIC 660 if (in_pcbnotifymiss) { 661 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 662 ntohl(laddr.s_addr), ntohs(lport)); 663 } 664 #endif 665 return (0); 666 667 out: 668 /* Move this PCB to the head of hash chain. */ 669 if (inp != head->lh_first) { 670 LIST_REMOVE(inp, inp_hash); 671 LIST_INSERT_HEAD(head, inp, inp_hash); 672 } 673 return (inp); 674 } 675 676 void 677 in_pcbstate(inp, state) 678 struct inpcb *inp; 679 int state; 680 { 681 682 if (inp->inp_state > INP_ATTACHED) 683 LIST_REMOVE(inp, inp_hash); 684 685 switch (state) { 686 case INP_BOUND: 687 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 688 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 689 break; 690 case INP_CONNECTED: 691 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 692 inp->inp_faddr, inp->inp_fport, 693 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 694 break; 695 } 696 697 inp->inp_state = state; 698 } 699 700 struct rtentry * 701 in_pcbrtentry(inp) 702 struct inpcb *inp; 703 { 704 struct route *ro; 705 706 ro = &inp->inp_route; 707 708 if (ro->ro_rt == NULL) { 709 /* 710 * No route yet, so try to acquire one. 711 */ 712 if (!in_nullhost(inp->inp_faddr)) { 713 ro->ro_dst.sa_family = AF_INET; 714 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 715 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 716 rtalloc(ro); 717 } 718 } 719 return (ro->ro_rt); 720 } 721
Indexes created Sun Sep 21 14:09:52 GMT 2025