in6_pcb.c revision 1.29
1 /* $NetBSD: in6_pcb.c,v 1.29 2000/07/07 15:54:18 itojun Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.57 2000/07/07 10:27:12 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/time.h> 80 #include <sys/proc.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/in6_pcb.h> 93 #include <netinet6/nd6.h> 94 95 #include "loop.h" 96 extern struct ifnet loif[NLOOP]; 97 #include "faith.h" 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #include <netkey/key.h> 102 #endif /* IPSEC */ 103 104 struct in6_addr zeroin6_addr; 105 106 int 107 in6_pcballoc(so, head) 108 struct socket *so; 109 struct in6pcb *head; 110 { 111 struct in6pcb *in6p; 112 113 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 114 if (in6p == NULL) 115 return(ENOBUFS); 116 bzero((caddr_t)in6p, sizeof(*in6p)); 117 in6p->in6p_head = head; 118 in6p->in6p_socket = so; 119 in6p->in6p_hops = -1; /* use kernel default */ 120 in6p->in6p_icmp6filt = NULL; 121 in6p->in6p_next = head->in6p_next; 122 head->in6p_next = in6p; 123 in6p->in6p_prev = head; 124 in6p->in6p_next->in6p_prev = in6p; 125 #ifndef INET6_BINDV6ONLY 126 if (ip6_bindv6only) 127 in6p->in6p_flags |= IN6P_BINDV6ONLY; 128 #else 129 in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/ 130 #endif 131 so->so_pcb = (caddr_t)in6p; 132 return(0); 133 } 134 135 int 136 in6_pcbbind(in6p, nam, p) 137 register struct in6pcb *in6p; 138 struct mbuf *nam; 139 struct proc *p; 140 { 141 struct socket *so = in6p->in6p_socket; 142 struct in6pcb *head = in6p->in6p_head; 143 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 144 u_int16_t lport = 0; 145 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 146 147 if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 148 return(EINVAL); 149 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 150 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 151 (so->so_options & SO_ACCEPTCONN) == 0)) 152 wild = IN6PLOOKUP_WILDCARD; 153 if (nam) { 154 sin6 = mtod(nam, struct sockaddr_in6 *); 155 if (nam->m_len != sizeof(*sin6)) 156 return(EINVAL); 157 /* 158 * We should check the family, but old programs 159 * incorrectly fail to intialize it. 160 */ 161 if (sin6->sin6_family != AF_INET6) 162 return(EAFNOSUPPORT); 163 164 /* 165 * since we do not check port number duplicate with IPv4 space, 166 * we reject it at this moment. If we leave it, we make normal 167 * user to hijack port number from other users. 168 */ 169 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 170 return(EADDRNOTAVAIL); 171 172 /* KAME hack: embed scopeid */ 173 if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL) != 0) 174 return EINVAL; 175 /* this must be cleared for ifa_ifwithaddr() */ 176 sin6->sin6_scope_id = 0; 177 178 lport = sin6->sin6_port; 179 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 180 /* 181 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 182 * allow compepte duplication of binding if 183 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 184 * and a multicast address is bound on both 185 * new and duplicated sockets. 186 */ 187 if (so->so_options & SO_REUSEADDR) 188 reuseport = SO_REUSEADDR|SO_REUSEPORT; 189 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 190 struct sockaddr_in sin; 191 192 bzero(&sin, sizeof(sin)); 193 sin.sin_len = sizeof(sin); 194 sin.sin_family = AF_INET; 195 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 196 sizeof(sin.sin_addr)); 197 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 198 return EADDRNOTAVAIL; 199 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 200 struct ifaddr *ia = NULL; 201 202 sin6->sin6_port = 0; /* yech... */ 203 #if defined(NFAITH) && NFAITH > 0 204 if ((in6p->in6p_flags & IN6P_FAITH) == 0 205 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 206 #else 207 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 208 #endif 209 return(EADDRNOTAVAIL); 210 211 /* 212 * XXX: bind to an anycast address might accidentally 213 * cause sending a packet with anycast source address. 214 */ 215 if (ia && 216 ((struct in6_ifaddr *)ia)->ia6_flags & 217 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 218 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 219 return(EADDRNOTAVAIL); 220 } 221 } 222 if (lport) { 223 #ifndef IPNOPRIVPORTS 224 int priv; 225 226 /* 227 * NOTE: all operating systems use suser() for 228 * privilege check! do not rewrite it into SS_PRIV. 229 */ 230 priv = (p && !suser(p->p_ucred, &p->p_acflag)) ? 1 : 0; 231 /* GROSS */ 232 if (ntohs(lport) < IPV6PORT_RESERVED && !priv) 233 return(EACCES); 234 #endif 235 236 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 237 /* should check this but we can't ... */ 238 #if 0 239 struct inpcb *t; 240 241 t = in_pcblookup_bind(&tcbtable, 242 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 243 lport); 244 if (t && (reuseport & t->inp_socket->so_options) == 0) 245 return EADDRINUSE; 246 #endif 247 } else { 248 struct in6pcb *t; 249 250 t = in6_pcblookup(head, &zeroin6_addr, 0, 251 &sin6->sin6_addr, lport, wild); 252 if (t && (reuseport & t->in6p_socket->so_options) == 0) 253 return(EADDRINUSE); 254 } 255 } 256 in6p->in6p_laddr = sin6->sin6_addr; 257 } 258 259 if (lport == 0) { 260 int e; 261 if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p)) != 0) 262 return(e); 263 } 264 else 265 in6p->in6p_lport = lport; 266 267 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 268 return(0); 269 } 270 271 /* 272 * Connect from a socket to a specified address. 273 * Both address and port must be specified in argument sin6. 274 * If don't have a local address for this socket yet, 275 * then pick one. 276 */ 277 int 278 in6_pcbconnect(in6p, nam) 279 struct in6pcb *in6p; 280 struct mbuf *nam; 281 { 282 struct in6_addr *in6a = NULL; 283 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 284 struct ifnet *ifp = NULL; /* outgoing interface */ 285 int error = 0; 286 struct in6_addr mapped; 287 struct sockaddr_in6 tmp; 288 289 (void)&in6a; /* XXX fool gcc */ 290 291 if (nam->m_len != sizeof(*sin6)) 292 return(EINVAL); 293 if (sin6->sin6_family != AF_INET6) 294 return(EAFNOSUPPORT); 295 if (sin6->sin6_port == 0) 296 return(EADDRNOTAVAIL); 297 298 /* sanity check for mapped address case */ 299 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 300 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 301 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 302 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 303 return EINVAL; 304 } else { 305 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 306 return EINVAL; 307 } 308 309 /* protect *sin6 from overwrites */ 310 tmp = *sin6; 311 sin6 = &tmp; 312 313 /* KAME hack: embed scopeid */ 314 if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, &ifp) != 0) 315 return EINVAL; 316 317 /* Source address selection. */ 318 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 319 && in6p->in6p_laddr.s6_addr32[3] == 0) { 320 struct sockaddr_in sin, *sinp; 321 322 bzero(&sin, sizeof(sin)); 323 sin.sin_len = sizeof(sin); 324 sin.sin_family = AF_INET; 325 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 326 sizeof(sin.sin_addr)); 327 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 328 in6p->in6p_socket->so_options, NULL, &error); 329 if (sinp == 0) { 330 if (error == 0) 331 error = EADDRNOTAVAIL; 332 return(error); 333 } 334 bzero(&mapped, sizeof(mapped)); 335 mapped.s6_addr16[5] = htons(0xffff); 336 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 337 in6a = &mapped; 338 } else { 339 /* 340 * XXX: in6_selectsrc might replace the bound local address 341 * with the address specified by setsockopt(IPV6_PKTINFO). 342 * Is it the intended behavior? 343 */ 344 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 345 in6p->in6p_moptions, 346 &in6p->in6p_route, 347 &in6p->in6p_laddr, &error); 348 if (in6a == 0) { 349 if (error == 0) 350 error = EADDRNOTAVAIL; 351 return(error); 352 } 353 } 354 if (in6p->in6p_route.ro_rt) 355 ifp = in6p->in6p_route.ro_rt->rt_ifp; 356 357 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 358 359 if (in6_pcblookup(in6p->in6p_head, 360 &sin6->sin6_addr, 361 sin6->sin6_port, 362 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? 363 in6a : &in6p->in6p_laddr, 364 in6p->in6p_lport, 365 0)) 366 return(EADDRINUSE); 367 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) 368 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 369 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 370 if (in6p->in6p_lport == 0) { 371 #ifdef __NetBSD__ 372 (void)in6_pcbbind(in6p, (struct mbuf *)0, 373 (struct proc *)0); 374 #else 375 (void)in6_pcbbind(in6p, (struct mbuf *)0); 376 #endif 377 } 378 in6p->in6p_laddr = *in6a; 379 } 380 in6p->in6p_faddr = sin6->sin6_addr; 381 in6p->in6p_fport = sin6->sin6_port; 382 /* 383 * xxx kazu flowlabel is necessary for connect? 384 * but if this line is missing, the garbage value remains. 385 */ 386 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 387 return(0); 388 } 389 390 void 391 in6_pcbdisconnect(in6p) 392 struct in6pcb *in6p; 393 { 394 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 395 in6p->in6p_fport = 0; 396 if (in6p->in6p_socket->so_state & SS_NOFDREF) 397 in6_pcbdetach(in6p); 398 } 399 400 void 401 in6_pcbdetach(in6p) 402 struct in6pcb *in6p; 403 { 404 struct socket *so = in6p->in6p_socket; 405 406 #ifdef IPSEC 407 ipsec6_delete_pcbpolicy(in6p); 408 #endif /* IPSEC */ 409 sotoin6pcb(so) = 0; 410 sofree(so); 411 if (in6p->in6p_options) 412 m_freem(in6p->in6p_options); 413 if (in6p->in6p_outputopts) { 414 if (in6p->in6p_outputopts->ip6po_rthdr && 415 in6p->in6p_outputopts->ip6po_route.ro_rt) 416 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 417 if (in6p->in6p_outputopts->ip6po_m) 418 (void)m_free(in6p->in6p_outputopts->ip6po_m); 419 free(in6p->in6p_outputopts, M_IP6OPT); 420 } 421 if (in6p->in6p_route.ro_rt) 422 rtfree(in6p->in6p_route.ro_rt); 423 ip6_freemoptions(in6p->in6p_moptions); 424 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 425 in6p->in6p_prev->in6p_next = in6p->in6p_next; 426 in6p->in6p_prev = NULL; 427 FREE(in6p, M_PCB); 428 } 429 430 void 431 in6_setsockaddr(in6p, nam) 432 struct in6pcb *in6p; 433 struct mbuf *nam; 434 { 435 struct sockaddr_in6 *sin6; 436 437 nam->m_len = sizeof(*sin6); 438 sin6 = mtod(nam, struct sockaddr_in6 *); 439 bzero((caddr_t)sin6, sizeof(*sin6)); 440 sin6->sin6_family = AF_INET6; 441 sin6->sin6_len = sizeof(struct sockaddr_in6); 442 sin6->sin6_port = in6p->in6p_lport; 443 /* KAME hack: recover scopeid */ 444 (void)in6_recoverscope(sin6, &in6p->in6p_laddr, NULL); 445 } 446 447 void 448 in6_setpeeraddr(in6p, nam) 449 struct in6pcb *in6p; 450 struct mbuf *nam; 451 { 452 struct sockaddr_in6 *sin6; 453 454 nam->m_len = sizeof(*sin6); 455 sin6 = mtod(nam, struct sockaddr_in6 *); 456 bzero((caddr_t)sin6, sizeof(*sin6)); 457 sin6->sin6_family = AF_INET6; 458 sin6->sin6_len = sizeof(struct sockaddr_in6); 459 sin6->sin6_port = in6p->in6p_fport; 460 /* KAME hack: recover scopeid */ 461 (void)in6_recoverscope(sin6, &in6p->in6p_faddr, NULL); 462 } 463 464 /* 465 * Pass some notification to all connections of a protocol 466 * associated with address dst. The local address and/or port numbers 467 * may be specified to limit the search. The "usual action" will be 468 * taken, depending on the ctlinput cmd. The caller must filter any 469 * cmds that are uninteresting (e.g., no error in the map). 470 * Call the protocol specific routine (if any) to report 471 * any errors for each matching socket. 472 * 473 * Must be called at splsoftnet. 474 */ 475 int 476 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 477 struct in6pcb *head; 478 struct sockaddr *dst; 479 u_int fport_arg, lport_arg; 480 struct in6_addr *laddr6; 481 int cmd; 482 void (*notify) __P((struct in6pcb *, int)); 483 { 484 struct in6pcb *in6p, *nin6p; 485 struct in6_addr faddr6; 486 u_int16_t fport = fport_arg, lport = lport_arg; 487 int errno; 488 int nmatch = 0; 489 int do_rtchange = (notify == in6_rtchange); 490 491 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 492 return 0; 493 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 494 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) 495 return 0; 496 497 /* 498 * Redirects go to all references to the destination, 499 * and use in6_rtchange to invalidate the route cache. 500 * Dead host indications: also use in6_rtchange to invalidate 501 * the cache, and deliver the error to all the sockets. 502 * Otherwise, if we have knowledge of the local port and address, 503 * deliver only to that socket. 504 */ 505 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 506 fport = 0; 507 lport = 0; 508 bzero((caddr_t)laddr6, sizeof(*laddr6)); 509 510 do_rtchange = 1; 511 } 512 513 if (notify == NULL) 514 return 0; 515 516 errno = inet6ctlerrmap[cmd]; 517 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 518 nin6p = in6p->in6p_next; 519 520 if (do_rtchange) { 521 /* 522 * Since a non-connected PCB might have a cached route, 523 * we always call in6_rtchange without matching 524 * the PCB to the src/dst pair. 525 * 526 * XXX: we assume in6_rtchange does not free the PCB. 527 */ 528 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr, 529 &faddr6)) 530 in6_rtchange(in6p, errno); 531 532 if (notify == in6_rtchange) 533 continue; /* there's nothing to do any more */ 534 } 535 536 /* at this point, we can assume that NOTIFY is not NULL. */ 537 538 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) || 539 in6p->in6p_socket == 0 || 540 (lport && in6p->in6p_lport != lport) || 541 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && 542 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 543 (fport && in6p->in6p_fport != fport)) 544 continue; 545 546 (*notify)(in6p, errno); 547 nmatch++; 548 } 549 return nmatch; 550 } 551 552 void 553 in6_pcbpurgeif(head, ifp) 554 struct in6pcb *head; 555 struct ifnet *ifp; 556 { 557 struct in6pcb *in6p, *nin6p; 558 559 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 560 nin6p = in6p->in6p_next; 561 if (in6p->in6p_route.ro_rt != NULL && 562 in6p->in6p_route.ro_rt->rt_ifp == ifp) 563 in6_rtchange(in6p, 0); 564 } 565 } 566 567 /* 568 * Check for alternatives when higher level complains 569 * about service problems. For now, invalidate cached 570 * routing information. If the route was created dynamically 571 * (by a redirect), time to try a default gateway again. 572 */ 573 void 574 in6_losing(in6p) 575 struct in6pcb *in6p; 576 { 577 struct rtentry *rt; 578 struct rt_addrinfo info; 579 580 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 581 in6p->in6p_route.ro_rt = 0; 582 bzero((caddr_t)&info, sizeof(info)); 583 info.rti_info[RTAX_DST] = 584 (struct sockaddr *)&in6p->in6p_route.ro_dst; 585 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 586 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 587 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 588 if (rt->rt_flags & RTF_DYNAMIC) 589 (void)rtrequest(RTM_DELETE, rt_key(rt), 590 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 591 (struct rtentry **)0); 592 else 593 /* 594 * A new route can be allocated 595 * the next time output is attempted. 596 */ 597 rtfree(rt); 598 } 599 } 600 601 /* 602 * After a routing change, flush old routing 603 * and allocate a (hopefully) better one. 604 */ 605 void 606 in6_rtchange(in6p, errno) 607 struct in6pcb *in6p; 608 int errno; 609 { 610 if (in6p->in6p_route.ro_rt) { 611 rtfree(in6p->in6p_route.ro_rt); 612 in6p->in6p_route.ro_rt = 0; 613 /* 614 * A new route can be allocated the next time 615 * output is attempted. 616 */ 617 } 618 } 619 620 struct in6pcb * 621 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 622 struct in6pcb *head; 623 struct in6_addr *faddr6, *laddr6; 624 u_int fport_arg, lport_arg; 625 int flags; 626 { 627 struct in6pcb *in6p, *match = 0; 628 int matchwild = 3, wildcard; 629 u_int16_t fport = fport_arg, lport = lport_arg; 630 631 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 632 if (in6p->in6p_lport != lport) 633 continue; 634 wildcard = 0; 635 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 636 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 637 wildcard++; 638 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 639 continue; 640 } 641 #ifndef TCP6 642 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 643 && in6p->in6p_laddr.s6_addr32[3] == 0) { 644 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 645 continue; 646 if (laddr6->s6_addr32[3] == 0) 647 ; 648 else 649 wildcard++; 650 } 651 #endif 652 else { 653 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 654 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 655 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 656 continue; 657 else 658 wildcard++; 659 #else 660 continue; 661 #endif 662 } else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 663 wildcard++; 664 } 665 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 666 if (IN6_IS_ADDR_UNSPECIFIED(faddr6)) 667 wildcard++; 668 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 669 || in6p->in6p_fport != fport) 670 continue; 671 } 672 #ifndef TCP6 673 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) 674 && in6p->in6p_faddr.s6_addr32[3] == 0) { 675 if (!IN6_IS_ADDR_V4MAPPED(faddr6)) 676 continue; 677 if (faddr6->s6_addr32[3] == 0) 678 ; 679 else 680 wildcard++; 681 } 682 #endif 683 else { 684 if (IN6_IS_ADDR_V4MAPPED(faddr6)) { 685 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 686 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 687 continue; 688 else 689 wildcard++; 690 #else 691 continue; 692 #endif 693 } else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6)) 694 wildcard++; 695 } 696 697 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 698 continue; 699 if (wildcard < matchwild) { 700 match = in6p; 701 matchwild = wildcard; 702 if (matchwild == 0) 703 break; 704 } 705 } 706 return(match); 707 } 708 709 #ifndef TCP6 710 struct rtentry * 711 in6_pcbrtentry(in6p) 712 struct in6pcb *in6p; 713 { 714 struct route_in6 *ro; 715 716 ro = &in6p->in6p_route; 717 718 if (ro->ro_rt == NULL) { 719 /* 720 * No route yet, so try to acquire one. 721 */ 722 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 723 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 724 ro->ro_dst.sin6_family = AF_INET6; 725 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 726 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 727 rtalloc((struct route *)ro); 728 } 729 } 730 return (ro->ro_rt); 731 } 732 733 struct in6pcb * 734 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 735 struct in6pcb *head; 736 struct in6_addr *faddr6, *laddr6; 737 u_int fport_arg, lport_arg; 738 int faith; 739 { 740 struct in6pcb *in6p; 741 u_int16_t fport = fport_arg, lport = lport_arg; 742 743 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 744 /* find exact match on both source and dest */ 745 if (in6p->in6p_fport != fport) 746 continue; 747 if (in6p->in6p_lport != lport) 748 continue; 749 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 750 continue; 751 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 752 continue; 753 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 754 continue; 755 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 756 continue; 757 return in6p; 758 } 759 return NULL; 760 } 761 762 struct in6pcb * 763 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 764 struct in6pcb *head; 765 struct in6_addr *laddr6; 766 u_int lport_arg; 767 int faith; 768 { 769 struct in6pcb *in6p, *match; 770 u_int16_t lport = lport_arg; 771 772 match = NULL; 773 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 774 /* 775 * find destination match. exact match is preferred 776 * against wildcard match. 777 */ 778 #if defined(NFAITH) && NFAITH > 0 779 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 780 continue; 781 #endif 782 if (in6p->in6p_fport != 0) 783 continue; 784 if (in6p->in6p_lport != lport) 785 continue; 786 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 787 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 788 #ifndef INET6_BINDV6ONLY 789 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 790 continue; 791 else 792 match = in6p; 793 #else 794 continue; 795 #endif 796 } else 797 match = in6p; 798 } 799 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 800 in6p->in6p_laddr.s6_addr32[3] == 0) { 801 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 802 laddr6->s6_addr32[3] != 0) 803 match = in6p; 804 } 805 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 806 return in6p; 807 } 808 return match; 809 } 810 #endif 811
Indexes created Mon Sep 22 13:09:51 GMT 2025