in_pcb.c revision 1.39.2.2
1 /* $NetBSD: in_pcb.c,v 1.39.2.2 1997/11/28 08:55:41 mellon 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_RESERVED; 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 < IPPORT_USERRESERVED; lport++) 182 if (!in_pcblookup_port(table, inp->inp_laddr, 183 htons(lport), wild)) 184 goto found; 185 for (lport = IPPORT_RESERVED; 186 lport <= table->inpt_lastport; lport++) 187 if (!in_pcblookup_port(table, inp->inp_laddr, 188 htons(lport), wild)) 189 goto found; 190 if (!in_nullhost(inp->inp_laddr)) 191 inp->inp_laddr.s_addr = INADDR_ANY; 192 return (EAGAIN); 193 found: 194 table->inpt_lastport = lport; 195 lport = htons(lport); 196 } 197 inp->inp_lport = lport; 198 in_pcbstate(inp, INP_BOUND); 199 return (0); 200 } 201 202 /* 203 * Connect from a socket to a specified address. 204 * Both address and port must be specified in argument sin. 205 * If don't have a local address for this socket yet, 206 * then pick one. 207 */ 208 int 209 in_pcbconnect(v, nam) 210 register void *v; 211 struct mbuf *nam; 212 { 213 register struct inpcb *inp = v; 214 struct in_ifaddr *ia; 215 struct sockaddr_in *ifaddr = NULL; 216 register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); 217 int error; 218 219 if (nam->m_len != sizeof (*sin)) 220 return (EINVAL); 221 if (sin->sin_family != AF_INET) 222 return (EAFNOSUPPORT); 223 if (sin->sin_port == 0) 224 return (EADDRNOTAVAIL); 225 if (in_ifaddr.tqh_first != 0) { 226 /* 227 * If the destination address is INADDR_ANY, 228 * use the primary local address. 229 * If the supplied address is INADDR_BROADCAST, 230 * and the primary interface supports broadcast, 231 * choose the broadcast address for that interface. 232 */ 233 if (in_nullhost(sin->sin_addr)) 234 sin->sin_addr = in_ifaddr.tqh_first->ia_addr.sin_addr; 235 else if (sin->sin_addr.s_addr == INADDR_BROADCAST && 236 (in_ifaddr.tqh_first->ia_ifp->if_flags & IFF_BROADCAST)) 237 sin->sin_addr = in_ifaddr.tqh_first->ia_broadaddr.sin_addr; 238 } 239 /* 240 * If we haven't bound which network number to use as ours, 241 * we will use the number of the outgoing interface. 242 * This depends on having done a routing lookup, which 243 * we will probably have to do anyway, so we might 244 * as well do it now. On the other hand if we are 245 * sending to multiple destinations we may have already 246 * done the lookup, so see if we can use the route 247 * from before. In any case, we only 248 * chose a port number once, even if sending to multiple 249 * destinations. 250 */ 251 if (in_nullhost(inp->inp_laddr)) { 252 register struct route *ro; 253 254 ia = (struct in_ifaddr *)0; 255 /* 256 * If route is known or can be allocated now, 257 * our src addr is taken from the i/f, else punt. 258 */ 259 ro = &inp->inp_route; 260 if (ro->ro_rt && 261 (!in_hosteq(satosin(&ro->ro_dst)->sin_addr, 262 sin->sin_addr) || 263 inp->inp_socket->so_options & SO_DONTROUTE)) { 264 RTFREE(ro->ro_rt); 265 ro->ro_rt = (struct rtentry *)0; 266 } 267 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 268 (ro->ro_rt == (struct rtentry *)0 || 269 ro->ro_rt->rt_ifp == (struct ifnet *)0)) { 270 /* No route yet, so try to acquire one */ 271 ro->ro_dst.sa_family = AF_INET; 272 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 273 satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; 274 rtalloc(ro); 275 } 276 /* 277 * If we found a route, use the address 278 * corresponding to the outgoing interface 279 * unless it is the loopback (in case a route 280 * to our address on another net goes to loopback). 281 */ 282 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) 283 ia = ifatoia(ro->ro_rt->rt_ifa); 284 if (ia == 0) { 285 u_int16_t fport = sin->sin_port; 286 287 sin->sin_port = 0; 288 ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); 289 sin->sin_port = fport; 290 if (ia == 0) 291 ia = in_ifaddr.tqh_first; 292 if (ia == 0) 293 return (EADDRNOTAVAIL); 294 } 295 /* 296 * If the destination address is multicast and an outgoing 297 * interface has been set as a multicast option, use the 298 * address of that interface as our source address. 299 */ 300 if (IN_MULTICAST(sin->sin_addr.s_addr) && 301 inp->inp_moptions != NULL) { 302 struct ip_moptions *imo; 303 struct ifnet *ifp; 304 305 imo = inp->inp_moptions; 306 if (imo->imo_multicast_ifp != NULL) { 307 ifp = imo->imo_multicast_ifp; 308 for (ia = in_ifaddr.tqh_first; ia != 0; 309 ia = ia->ia_list.tqe_next) 310 if (ia->ia_ifp == ifp) 311 break; 312 if (ia == 0) 313 return (EADDRNOTAVAIL); 314 } 315 } 316 ifaddr = satosin(&ia->ia_addr); 317 } 318 if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, 319 !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, 320 inp->inp_lport) != 0) 321 return (EADDRINUSE); 322 if (in_nullhost(inp->inp_laddr)) { 323 if (inp->inp_lport == 0) { 324 error = in_pcbbind(inp, (struct mbuf *)0, 325 (struct proc *)0); 326 /* 327 * This used to ignore the return value 328 * completely, but we need to check for 329 * ephemeral port shortage. 330 * XXX Should we check for other errors, too? 331 */ 332 if (error == EAGAIN) 333 return (error); 334 } 335 inp->inp_laddr = ifaddr->sin_addr; 336 } 337 inp->inp_faddr = sin->sin_addr; 338 inp->inp_fport = sin->sin_port; 339 in_pcbstate(inp, INP_CONNECTED); 340 return (0); 341 } 342 343 void 344 in_pcbdisconnect(v) 345 void *v; 346 { 347 struct inpcb *inp = v; 348 349 inp->inp_faddr = zeroin_addr; 350 inp->inp_fport = 0; 351 in_pcbstate(inp, INP_BOUND); 352 if (inp->inp_socket->so_state & SS_NOFDREF) 353 in_pcbdetach(inp); 354 } 355 356 void 357 in_pcbdetach(v) 358 void *v; 359 { 360 struct inpcb *inp = v; 361 struct socket *so = inp->inp_socket; 362 int s; 363 364 so->so_pcb = 0; 365 sofree(so); 366 if (inp->inp_options) 367 (void)m_free(inp->inp_options); 368 if (inp->inp_route.ro_rt) 369 rtfree(inp->inp_route.ro_rt); 370 ip_freemoptions(inp->inp_moptions); 371 s = splnet(); 372 in_pcbstate(inp, INP_ATTACHED); 373 CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue); 374 splx(s); 375 FREE(inp, M_PCB); 376 } 377 378 void 379 in_setsockaddr(inp, nam) 380 register struct inpcb *inp; 381 struct mbuf *nam; 382 { 383 register struct sockaddr_in *sin; 384 385 nam->m_len = sizeof (*sin); 386 sin = mtod(nam, struct sockaddr_in *); 387 bzero((caddr_t)sin, sizeof (*sin)); 388 sin->sin_family = AF_INET; 389 sin->sin_len = sizeof(*sin); 390 sin->sin_port = inp->inp_lport; 391 sin->sin_addr = inp->inp_laddr; 392 } 393 394 void 395 in_setpeeraddr(inp, nam) 396 struct inpcb *inp; 397 struct mbuf *nam; 398 { 399 register struct sockaddr_in *sin; 400 401 nam->m_len = sizeof (*sin); 402 sin = mtod(nam, struct sockaddr_in *); 403 bzero((caddr_t)sin, sizeof (*sin)); 404 sin->sin_family = AF_INET; 405 sin->sin_len = sizeof(*sin); 406 sin->sin_port = inp->inp_fport; 407 sin->sin_addr = inp->inp_faddr; 408 } 409 410 /* 411 * Pass some notification to all connections of a protocol 412 * associated with address dst. The local address and/or port numbers 413 * may be specified to limit the search. The "usual action" will be 414 * taken, depending on the ctlinput cmd. The caller must filter any 415 * cmds that are uninteresting (e.g., no error in the map). 416 * Call the protocol specific routine (if any) to report 417 * any errors for each matching socket. 418 * 419 * Must be called at splsoftnet. 420 */ 421 int 422 in_pcbnotify(table, faddr, fport_arg, laddr, lport_arg, errno, notify) 423 struct inpcbtable *table; 424 struct in_addr faddr, laddr; 425 u_int fport_arg, lport_arg; 426 int errno; 427 void (*notify) __P((struct inpcb *, int)); 428 { 429 struct inpcbhead *head; 430 register struct inpcb *inp, *ninp; 431 u_int16_t fport = fport_arg, lport = lport_arg; 432 int nmatch; 433 434 if (in_nullhost(faddr) || notify == 0) 435 return (0); 436 437 nmatch = 0; 438 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 439 for (inp = head->lh_first; inp != NULL; inp = ninp) { 440 ninp = inp->inp_hash.le_next; 441 if (in_hosteq(inp->inp_faddr, faddr) && 442 inp->inp_fport == fport && 443 inp->inp_lport == lport && 444 in_hosteq(inp->inp_laddr, laddr)) { 445 (*notify)(inp, errno); 446 nmatch++; 447 } 448 } 449 return (nmatch); 450 } 451 452 void 453 in_pcbnotifyall(table, faddr, errno, notify) 454 struct inpcbtable *table; 455 struct in_addr faddr; 456 int errno; 457 void (*notify) __P((struct inpcb *, int)); 458 { 459 register struct inpcb *inp, *ninp; 460 461 if (in_nullhost(faddr) || notify == 0) 462 return; 463 464 for (inp = table->inpt_queue.cqh_first; 465 inp != (struct inpcb *)&table->inpt_queue; 466 inp = ninp) { 467 ninp = inp->inp_queue.cqe_next; 468 if (in_hosteq(inp->inp_faddr, faddr)) 469 (*notify)(inp, errno); 470 } 471 } 472 473 /* 474 * Check for alternatives when higher level complains 475 * about service problems. For now, invalidate cached 476 * routing information. If the route was created dynamically 477 * (by a redirect), time to try a default gateway again. 478 */ 479 void 480 in_losing(inp) 481 struct inpcb *inp; 482 { 483 register struct rtentry *rt; 484 struct rt_addrinfo info; 485 486 if ((rt = inp->inp_route.ro_rt)) { 487 inp->inp_route.ro_rt = 0; 488 bzero((caddr_t)&info, sizeof(info)); 489 info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst; 490 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 491 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 492 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 493 if (rt->rt_flags & RTF_DYNAMIC) 494 (void) rtrequest(RTM_DELETE, rt_key(rt), 495 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 496 (struct rtentry **)0); 497 else 498 /* 499 * A new route can be allocated 500 * the next time output is attempted. 501 */ 502 rtfree(rt); 503 } 504 } 505 506 /* 507 * After a routing change, flush old routing 508 * and allocate a (hopefully) better one. 509 */ 510 void 511 in_rtchange(inp, errno) 512 register struct inpcb *inp; 513 int errno; 514 { 515 516 if (inp->inp_route.ro_rt) { 517 rtfree(inp->inp_route.ro_rt); 518 inp->inp_route.ro_rt = 0; 519 /* 520 * A new route can be allocated the next time 521 * output is attempted. 522 */ 523 } 524 /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ 525 } 526 527 struct inpcb * 528 in_pcblookup_port(table, laddr, lport_arg, flags) 529 struct inpcbtable *table; 530 struct in_addr laddr; 531 u_int lport_arg; 532 int flags; 533 { 534 register struct inpcb *inp, *match = 0; 535 int matchwild = 3, wildcard; 536 u_int16_t lport = lport_arg; 537 538 for (inp = table->inpt_queue.cqh_first; 539 inp != (struct inpcb *)&table->inpt_queue; 540 inp = inp->inp_queue.cqe_next) { 541 if (inp->inp_lport != lport) 542 continue; 543 wildcard = 0; 544 if (!in_nullhost(inp->inp_faddr)) 545 wildcard++; 546 if (in_nullhost(inp->inp_laddr)) { 547 if (!in_nullhost(laddr)) 548 wildcard++; 549 } else { 550 if (in_nullhost(laddr)) 551 wildcard++; 552 else { 553 if (!in_hosteq(inp->inp_laddr, laddr)) 554 continue; 555 } 556 } 557 if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) 558 continue; 559 if (wildcard < matchwild) { 560 match = inp; 561 matchwild = wildcard; 562 if (matchwild == 0) 563 break; 564 } 565 } 566 return (match); 567 } 568 569 #ifdef DIAGNOSTIC 570 int in_pcbnotifymiss = 0; 571 #endif 572 573 struct inpcb * 574 in_pcblookup_connect(table, faddr, fport_arg, laddr, lport_arg) 575 struct inpcbtable *table; 576 struct in_addr faddr, laddr; 577 u_int fport_arg, lport_arg; 578 { 579 struct inpcbhead *head; 580 register struct inpcb *inp; 581 u_int16_t fport = fport_arg, lport = lport_arg; 582 583 head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); 584 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 585 if (in_hosteq(inp->inp_faddr, faddr) && 586 inp->inp_fport == fport && 587 inp->inp_lport == lport && 588 in_hosteq(inp->inp_laddr, laddr)) 589 goto out; 590 } 591 #ifdef DIAGNOSTIC 592 if (in_pcbnotifymiss) { 593 printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", 594 ntohl(faddr.s_addr), ntohs(fport), 595 ntohl(laddr.s_addr), ntohs(lport)); 596 } 597 #endif 598 return (0); 599 600 out: 601 /* Move this PCB to the head of hash chain. */ 602 if (inp != head->lh_first) { 603 LIST_REMOVE(inp, inp_hash); 604 LIST_INSERT_HEAD(head, inp, inp_hash); 605 } 606 return (inp); 607 } 608 609 struct inpcb * 610 in_pcblookup_bind(table, laddr, lport_arg) 611 struct inpcbtable *table; 612 struct in_addr laddr; 613 u_int lport_arg; 614 { 615 struct inpcbhead *head; 616 register struct inpcb *inp; 617 u_int16_t lport = lport_arg; 618 619 head = INPCBHASH_BIND(table, laddr, lport); 620 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 621 if (inp->inp_lport == lport && 622 in_hosteq(inp->inp_laddr, laddr)) 623 goto out; 624 } 625 head = INPCBHASH_BIND(table, zeroin_addr, lport); 626 for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { 627 if (inp->inp_lport == lport && 628 in_hosteq(inp->inp_laddr, zeroin_addr)) 629 goto out; 630 } 631 #ifdef DIAGNOSTIC 632 if (in_pcbnotifymiss) { 633 printf("in_pcblookup_bind: laddr=%08x lport=%d\n", 634 ntohl(laddr.s_addr), ntohs(lport)); 635 } 636 #endif 637 return (0); 638 639 out: 640 /* Move this PCB to the head of hash chain. */ 641 if (inp != head->lh_first) { 642 LIST_REMOVE(inp, inp_hash); 643 LIST_INSERT_HEAD(head, inp, inp_hash); 644 } 645 return (inp); 646 } 647 648 void 649 in_pcbstate(inp, state) 650 struct inpcb *inp; 651 int state; 652 { 653 654 if (inp->inp_state > INP_ATTACHED) 655 LIST_REMOVE(inp, inp_hash); 656 657 switch (state) { 658 case INP_BOUND: 659 LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, 660 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 661 break; 662 case INP_CONNECTED: 663 LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, 664 inp->inp_faddr, inp->inp_fport, 665 inp->inp_laddr, inp->inp_lport), inp, inp_hash); 666 break; 667 } 668 669 inp->inp_state = state; 670 } 671 672 struct rtentry * 673 in_pcbrtentry(inp) 674 struct inpcb *inp; 675 { 676 struct route *ro; 677 678 ro = &inp->inp_route; 679 680 if (ro->ro_rt == NULL) { 681 /* 682 * No route yet, so try to acquire one. 683 */ 684 if (!in_nullhost(inp->inp_faddr)) { 685 ro->ro_dst.sa_family = AF_INET; 686 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 687 satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; 688 rtalloc(ro); 689 } 690 } 691 return (ro->ro_rt); 692 } 693
Indexes created Tue Oct 14 21:09:58 GMT 2025