in_pcb.c revision 1.42
1 /* $NetBSD: in_pcb.c,v 1.42 1997/12/30 02:54:11 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1991, 1993 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 8.2 (Berkeley) 1/4/94 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 void 75 in_pcbinit(table, bindhashsize, connecthashsize) 76 struct inpcbtable *table; 77 int bindhashsize, connecthashsize; 78 { 79 80 CIRCLEQ_INIT(&table->inpt_queue); 81 table->inpt_bindhashtbl = 82 hashinit(bindhashsize, M_PCB, &table->inpt_bindhash); 83 table->inpt_connecthashtbl = 84 hashinit(connecthashsize, M_PCB, &table->inpt_connecthash); 85 table->inpt_lastport = IPPORT_USERLOW; 86 } 87 88 int 89 in_pcballoc(so, v) 90 struct socket *so; 91 void *v; 92 { 93 struct inpcbtable *table = v; 94 register struct inpcb *inp; 95 int s; 96 97 MALLOC(inp, struct inpcb *, sizeof(*inp), M_PCB, M_WAITOK); 98 if (inp == NULL) 99 return (ENOBUFS); 100 bzero((caddr_t)inp, sizeof(*inp)); 101 inp->inp_table = table; 102 inp->inp_socket = so; 103 inp->inp_errormtu = -1; 104 so->so_pcb = inp; 105 s = splnet(); 106 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue); 107 in_pcbstate(inp, INP_ATTACHED); 108 splx(s); 109 return (0); 110 } 111 112 int 113 in_pcbbind(v, nam, p) 114 void *v; 115 struct mbuf *nam; 116 struct proc *p; 117 { 118 register struct inpcb *inp = v; 119 register struct socket *so = inp->inp_socket; 120 register struct inpcbtable *table = inp->inp_table; 121 register struct sockaddr_in *sin; 122 u_int16_t lport = 0; 123 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 124 #ifndef IPNOPRIVPORTS 125 int error; 126 #endif 127 128 if (in_ifaddr.tqh_first == 0) 129 return (EADDRNOTAVAIL); 130 if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) 131 return (EINVAL); 132 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 133 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 134 (so->so_options & SO_ACCEPTCONN) == 0)) 135 wild = INPLOOKUP_WILDCARD; 136 if (nam == 0) 137 goto noname; 138 sin = mtod(nam, struct sockaddr_in *); 139 if (nam->m_len != sizeof (*sin)) 140 return (EINVAL); 141 #ifdef notdef 142 /* 143 * We should check the family, but old programs 144 * incorrectly fail to initialize it. 145 */ 146 if (sin->sin_family != AF_INET) 147 return (EAFNOSUPPORT); 148 #endif 149 lport = sin->sin_port; 150 if (IN_MULTICAST(sin->sin_addr.s_addr)) { 151 /* 152 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 153 * allow complete duplication of binding if 154 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 155 * and a multicast address is bound on both 156 * new and duplicated sockets. 157 */ 158 if (so->so_options & SO_REUSEADDR) 159 reuseport = SO_REUSEADDR|SO_REUSEPORT; 160 } else if (!in_nullhost(sin->sin_addr)) { 161 sin->sin_port = 0; /* yech... */ 162 if (ifa_ifwithaddr(sintosa(sin)) == 0) 163 return (EADDRNOTAVAIL); 164 } 165 if (lport) { 166 struct inpcb *t; 167 #ifndef IPNOPRIVPORTS 168 /* GROSS */ 169 if (ntohs(lport) < IPPORT_RESERVED && 170 (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 171 return (EACCES); 172 #endif 173 t = in_pcblookup_port(table, sin->sin_addr, lport, wild); 174 if (t && (reuseport & t->inp_socket->so_options) == 0) 175 return (EADDRINUSE); 176 } 177 inp->inp_laddr = sin->sin_addr; 178 noname: 179 if (lport == 0) { 180 for (lport = table->inpt_lastport + 1; 181 lport != table->inpt_lastport; lport++) { 182 if (lport < IPPORT_USERLOW || lport > IPPORT_USERHIGH) 183 lport = IPPORT_USERLOW; 184 if (!in_pcblookup_port(table, inp->inp_laddr, 185 htons(lport), wild)) 186 goto found; 187 } 188 if (!in_nullhost(inp->inp_laddr)) 189 inp->inp_laddr.s_addr = INADDR_ANY; 190 return (EAGAIN); 191 found: 192 table->inpt_lastport = lport; 193 lport = htons(lport); 194 } 195 inp->inp_lport = lport; 196 in_pcbstate(inp, INP_BOUND); 197 return (0); 198 } 199 200 /* 201 * Connect from a socket to a specified address. 202 * Both address and port must be specified in argument sin. 203 * If don't have a local address for this socket yet, 204 * then pick one. 205 */ 206 int 207 in_pcbconnect(v, nam) 208 register void *v; 209 struct mbuf *nam; 210 { 211 register struct inpcb *inp = v; 212 struct in_ifaddr *ia; 213 struct sockaddr_in *ifaddr = NULL; 214 register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 215 int error; 216 217 if (nam->m_len != sizeof (*sin)) 218 return (EINVAL); 219 if (sin->sin_family != AF_INET) 220 return (EAFNOSUPPORT); 221 if (sin->sin_port == 0) 222 return (EADDRNOTAVAIL); 223 if (in_ifaddr.tqh_first != 0) { 224 /* 225 * If the destination address is INADDR_ANY, 226 * use the primary local address. 227 * If the supplied address is INADDR_BROADCAST, 228 * and the primary interface supports broadcast, 229 * choose the broadcast address for that interface. 230 */ 231 if (in_nullhost(sin->sin_addr)) 232 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 233 else if (sin->sin_addr.s_addr == INADDR_BROADCAST && 234 (in_ifaddr.tqh_first->ia_ifp->if_flags & IFF_BROADCAST)) 235 sin->sin_addr = in_ifaddr.tqh_first->ia_broadaddr.sin_addr; 236 } 237 /* 238 * If we haven't bound which network number to use as ours, 239 * we will use the number of the outgoing interface. 240 * This depends on having done a routing lookup, which 241 * we will probably have to do anyway, so we might 242 * as well do it now. On the other hand if we are 243 * sending to multiple destinations we may have already 244 * done the lookup, so see if we can use the route 245 * from before. In any case, we only 246 * chose a port number once, even if sending to multiple 247 * destinations. 248 */ 249 if (in_nullhost(inp->inp_laddr)) { 250 register struct route *ro; 251 252 ia = (struct in_ifaddr *)0; 253 /* 254 * If route is known or can be allocated now, 255 * our src addr is taken from the i/f, else punt. 256 */ 257 ro = &inp->inp_route; 258 if (ro->ro_rt && 259 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 260 sin->sin_addr) || 261 inp->inp_socket->so_options & SO_DONTROUTE)) { 262 RTFREE(ro->ro_rt); 263 ro->ro_rt = (struct rtentry *)0; 264 } 265 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 266 (ro->ro_rt == (struct rtentry *)0 || 267 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 268 /* No route yet, so try to acquire one */ 269 ro->ro_dst.sa_family = AF_INET; 270 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 271 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 272 rtalloc(ro); 273 } 274 /* 275 * If we found a route, use the address 276 * corresponding to the outgoing interface 277 * unless it is the loopback (in case a route 278 * to our address on another net goes to loopback). 279 */ 280 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 281 ia = ifatoia(ro->ro_rt->rt_ifa); 282 if (ia == 0) { 283 u_int16_t fport = sin->sin_port; 284 285 sin->sin_port = 0; 286 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 287 sin->sin_port = fport; 288 if (ia == 0) 289 ia = in_ifaddr.tqh_first; 290 if (ia == 0) 291 return (EADDRNOTAVAIL); 292 } 293 /* 294 * If the destination address is multicast and an outgoing 295 * interface has been set as a multicast option, use the 296 * address of that interface as our source address. 297 */ 298 if (IN_MULTICAST(sin->sin_addr.s_addr) && 299 inp->inp_moptions != NULL) { 300 struct ip_moptions *imo; 301 struct ifnet *ifp; 302 303 imo = inp->inp_moptions; 304 if (imo->imo_multicast_ifp != NULL) { 305 ifp = imo->imo_multicast_ifp; 306 for (ia = in_ifaddr.tqh_first; ia != 0; 307 ia = ia->ia_list.tqe_next) 308 if (ia->ia_ifp == ifp) 309 break; 310 if (ia == 0) 311 return (EADDRNOTAVAIL); 312 } 313 } 314 ifaddr = satosin(&ia->ia_addr); 315 } 316 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 317 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 318 inp->inp_lport) != 0) 319 return (EADDRINUSE); 320 if (in_nullhost(inp->inp_laddr)) { 321 if (inp->inp_lport == 0) { 322 error = in_pcbbind(inp, (struct mbuf *)0, 323 (struct proc *)0); 324 /* 325 * This used to ignore the return value 326 * completely, but we need to check for 327 * ephemeral port shortage. 328 * XXX Should we check for other errors, too? 329 */ 330 if (error == EAGAIN) 331 return (error); 332 } 333 inp->inp_laddr = ifaddr->sin_addr; 334 } 335 inp->inp_faddr = sin->sin_addr; 336 inp->inp_fport = sin->sin_port; 337 in_pcbstate(inp, INP_CONNECTED); 338 return (0); 339 } 340 341 void 342 in_pcbdisconnect(v) 343 void *v; 344 { 345 struct inpcb *inp = v; 346 347 inp->inp_faddr = zeroin_addr; 348 inp->inp_fport = 0; 349 in_pcbstate(inp, INP_BOUND); 350 if (inp->inp_socket->so_state & SS_NOFDREF) 351 in_pcbdetach(inp); 352 } 353 354 void 355 in_pcbdetach(v) 356 void *v; 357 { 358 struct inpcb *inp = v; 359 struct socket *so = inp->inp_socket; 360 int s; 361 362 so->so_pcb = 0; 363 sofree(so); 364 if (inp->inp_options) 365 (void)m_free(inp->inp_options); 366 if (inp->inp_route.ro_rt) 367 rtfree(inp->inp_route.ro_rt); 368 ip_freemoptions(inp->inp_moptions); 369 s = splnet(); 370 in_pcbstate(inp, INP_ATTACHED); 371 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 372 splx(s); 373 FREE(inp, M_PCB); 374 } 375 376 void 377 in_setsockaddr(inp, nam) 378 register struct inpcb *inp; 379 struct mbuf *nam; 380 { 381 register struct sockaddr_in *sin; 382 383 nam->m_len = sizeof (*sin); 384 sin = mtod(nam, struct sockaddr_in *); 385 bzero((caddr_t)sin, sizeof (*sin)); 386 sin->sin_family = AF_INET; 387 sin->sin_len = sizeof(*sin); 388 sin->sin_port = inp->inp_lport; 389 sin->sin_addr = inp->inp_laddr; 390 } 391 392 void 393 in_setpeeraddr(inp, nam) 394 struct inpcb *inp; 395 struct mbuf *nam; 396 { 397 register struct sockaddr_in *sin; 398 399 nam->m_len = sizeof (*sin); 400 sin = mtod(nam, struct sockaddr_in *); 401 bzero((caddr_t)sin, sizeof (*sin)); 402 sin->sin_family = AF_INET; 403 sin->sin_len = sizeof(*sin); 404 sin->sin_port = inp->inp_fport; 405 sin->sin_addr = inp->inp_faddr; 406 } 407 408 /* 409 * Pass some notification to all connections of a protocol 410 * associated with address dst. The local address and/or port numbers 411 * may be specified to limit the search. The "usual action" will be 412 * taken, depending on the ctlinput cmd. The caller must filter any 413 * cmds that are uninteresting (e.g., no error in the map). 414 * Call the protocol specific routine (if any) to report 415 * any errors for each matching socket. 416 * 417 * Must be called at splsoftnet. 418 */ 419 int 420 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 421 struct inpcbtable *table; 422 struct in_addr faddr, laddr; 423 u_int fport_arg, lport_arg; 424 int errno; 425 void (*notify) __P((struct inpcb *, int)); 426 { 427 struct inpcbhead *head; 428 register struct inpcb *inp, *ninp; 429 u_int16_t fport = fport_arg, lport = lport_arg; 430 int nmatch; 431 432 if (in_nullhost(faddr) || notify == 0) 433 return (0); 434 435 nmatch = 0; 436 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 437 for (inp = head->lh_first; inp != NULL; inp = ninp) { 438 ninp = inp->inp_hash.le_next; 439 if (in_hosteq(inp->inp_faddr, faddr) && 440 inp->inp_fport == fport && 441 inp->inp_lport == lport && 442 in_hosteq(inp->inp_laddr, laddr)) { 443 (*notify)(inp, errno); 444 nmatch++; 445 } 446 } 447 return (nmatch); 448 } 449 450 void 451 in_pcbnotifyall(table, faddr, errno, notify) 452 struct inpcbtable *table; 453 struct in_addr faddr; 454 int errno; 455 void (*notify) __P((struct inpcb *, int)); 456 { 457 register struct inpcb *inp, *ninp; 458 459 if (in_nullhost(faddr) || notify == 0) 460 return; 461 462 for (inp = table->inpt_queue.cqh_first; 463 inp != (struct inpcb *)&table->inpt_queue; 464 inp = ninp) { 465 ninp = inp->inp_queue.cqe_next; 466 if (in_hosteq(inp->inp_faddr, faddr)) 467 (*notify)(inp, errno); 468 } 469 } 470 471 /* 472 * Check for alternatives when higher level complains 473 * about service problems. For now, invalidate cached 474 * routing information. If the route was created dynamically 475 * (by a redirect), time to try a default gateway again. 476 */ 477 void 478 in_losing(inp) 479 struct inpcb *inp; 480 { 481 register struct rtentry *rt; 482 struct rt_addrinfo info; 483 484 if ((rt = inp->inp_route.ro_rt)) { 485 inp->inp_route.ro_rt = 0; 486 bzero((caddr_t)&info, sizeof(info)); 487 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 488 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 489 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 490 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 491 if (rt->rt_flags & RTF_DYNAMIC) 492 (void) rtrequest(RTM_DELETE, rt_key(rt), 493 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 494 (struct rtentry **)0); 495 else 496 /* 497 * A new route can be allocated 498 * the next time output is attempted. 499 */ 500 rtfree(rt); 501 } 502 } 503 504 /* 505 * After a routing change, flush old routing 506 * and allocate a (hopefully) better one. 507 */ 508 void 509 in_rtchange(inp, errno) 510 register struct inpcb *inp; 511 int errno; 512 { 513 514 if (inp->inp_route.ro_rt) { 515 rtfree(inp->inp_route.ro_rt); 516 inp->inp_route.ro_rt = 0; 517 /* 518 * A new route can be allocated the next time 519 * output is attempted. 520 */ 521 } 522 /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 523 } 524 525 struct inpcb * 526 in_pcblookup_port(table, laddr, lport_arg, flags) 527 struct inpcbtable *table; 528 struct in_addr laddr; 529 u_int lport_arg; 530 int flags; 531 { 532 register struct inpcb *inp, *match = 0; 533 int matchwild = 3, wildcard; 534 u_int16_t lport = lport_arg; 535 536 for (inp = table->inpt_queue.cqh_first; 537 inp != (struct inpcb *)&table->inpt_queue; 538 inp = inp->inp_queue.cqe_next) { 539 if (inp->inp_lport != lport) 540 continue; 541 wildcard = 0; 542 if (!in_nullhost(inp->inp_faddr)) 543 wildcard++; 544 if (in_nullhost(inp->inp_laddr)) { 545 if (!in_nullhost(laddr)) 546 wildcard++; 547 } else { 548 if (in_nullhost(laddr)) 549 wildcard++; 550 else { 551 if (!in_hosteq(inp->inp_laddr, laddr)) 552 continue; 553 } 554 } 555 if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) 556 continue; 557 if (wildcard < matchwild) { 558 match = inp; 559 matchwild = wildcard; 560 if (matchwild == 0) 561 break; 562 } 563 } 564 return (match); 565 } 566 567 #ifdef DIAGNOSTIC 568 int in_pcbnotifymiss = 0; 569 #endif 570 571 struct inpcb * 572 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 573 struct inpcbtable *table; 574 struct in_addr faddr, laddr; 575 u_int fport_arg, lport_arg; 576 { 577 struct inpcbhead *head; 578 register struct inpcb *inp; 579 u_int16_t fport = fport_arg, lport = lport_arg; 580 581 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 582 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 583 if (in_hosteq(inp->inp_faddr, faddr) && 584 inp->inp_fport == fport && 585 inp->inp_lport == lport && 586 in_hosteq(inp->inp_laddr, laddr)) 587 goto out; 588 } 589 #ifdef DIAGNOSTIC 590 if (in_pcbnotifymiss) { 591 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 592 ntohl(faddr.s_addr), ntohs(fport), 593 ntohl(laddr.s_addr), ntohs(lport)); 594 } 595 #endif 596 return (0); 597 598 out: 599 /* Move this PCB to the head of hash chain. */ 600 if (inp != head->lh_first) { 601 LIST_REMOVE(inp, inp_hash); 602 LIST_INSERT_HEAD(head, inp, inp_hash); 603 } 604 return (inp); 605 } 606 607 struct inpcb * 608 in_pcblookup_bind(table, laddr, lport_arg) 609 struct inpcbtable *table; 610 struct in_addr laddr; 611 u_int lport_arg; 612 { 613 struct inpcbhead *head; 614 register struct inpcb *inp; 615 u_int16_t lport = lport_arg; 616 617 head = INPCBHASH_BIND(table, laddr, lport); 618 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 619 if (inp->inp_lport == lport && 620 in_hosteq(inp->inp_laddr, laddr)) 621 goto out; 622 } 623 head = INPCBHASH_BIND(table, zeroin_addr, lport); 624 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 625 if (inp->inp_lport == lport && 626 in_hosteq(inp->inp_laddr, zeroin_addr)) 627 goto out; 628 } 629 #ifdef DIAGNOSTIC 630 if (in_pcbnotifymiss) { 631 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 632 ntohl(laddr.s_addr), ntohs(lport)); 633 } 634 #endif 635 return (0); 636 637 out: 638 /* Move this PCB to the head of hash chain. */ 639 if (inp != head->lh_first) { 640 LIST_REMOVE(inp, inp_hash); 641 LIST_INSERT_HEAD(head, inp, inp_hash); 642 } 643 return (inp); 644 } 645 646 void 647 in_pcbstate(inp, state) 648 struct inpcb *inp; 649 int state; 650 { 651 652 if (inp->inp_state > INP_ATTACHED) 653 LIST_REMOVE(inp, inp_hash); 654 655 switch (state) { 656 case INP_BOUND: 657 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 658 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 659 break; 660 case INP_CONNECTED: 661 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 662 inp->inp_faddr, inp->inp_fport, 663 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 664 break; 665 } 666 667 inp->inp_state = state; 668 } 669 670 struct rtentry * 671 in_pcbrtentry(inp) 672 struct inpcb *inp; 673 { 674 struct route *ro; 675 676 ro = &inp->inp_route; 677 678 if (ro->ro_rt == NULL) { 679 /* 680 * No route yet, so try to acquire one. 681 */ 682 if (!in_nullhost(inp->inp_faddr)) { 683 ro->ro_dst.sa_family = AF_INET; 684 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 685 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 686 rtalloc(ro); 687 } 688 } 689 return (ro->ro_rt); 690 } 691
Indexes created Tue Sep 23 14:10:03 GMT 2025