in6_pcb.c revision 1.8
1 /* $NetBSD: in6_pcb.c,v 1.8 1999/07/17 07:07:09 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * 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. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/protosw.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/ioctl.h> 77 #include <sys/errno.h> 78 #include <sys/time.h> 79 #include <sys/proc.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 #include <netinet/in_systm.h> 87 #include <netinet/ip.h> 88 #include <netinet/in_pcb.h> 89 #include <netinet6/ip6.h> 90 #include <netinet6/in6_pcb.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/nd6.h> 93 94 #include "loop.h" 95 #ifdef __NetBSD__ 96 extern struct ifnet loif[NLOOP]; 97 #endif 98 #include "faith.h" 99 100 #ifdef IPSEC 101 #include <netinet6/ipsec.h> 102 #include <netkey/key.h> 103 #include <netkey/key_debug.h> 104 #endif /* IPSEC */ 105 106 struct in6_addr zeroin6_addr; 107 108 int 109 in6_pcballoc(so, head) 110 struct socket *so; 111 struct in6pcb *head; 112 { 113 struct in6pcb *in6p; 114 115 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 116 if (in6p == NULL) 117 return(ENOBUFS); 118 bzero((caddr_t)in6p, sizeof(*in6p)); 119 in6p->in6p_head = head; 120 in6p->in6p_socket = so; 121 in6p->in6p_hops = -1; /* use kernel default */ 122 in6p->in6p_icmp6filt = NULL; 123 #if 0 124 insque(in6p, head); 125 #else 126 in6p->in6p_next = head->in6p_next; 127 head->in6p_next = in6p; 128 in6p->in6p_prev = head; 129 in6p->in6p_next->in6p_prev = in6p; 130 #endif 131 so->so_pcb = (caddr_t)in6p; 132 return(0); 133 } 134 135 int 136 in6_pcbbind(in6p, nam) 137 register struct in6pcb *in6p; 138 struct mbuf *nam; 139 { 140 struct socket *so = in6p->in6p_socket; 141 struct in6pcb *head = in6p->in6p_head; 142 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 143 struct proc *p = curproc; /* XXX */ 144 u_short lport = 0; 145 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 146 int error; 147 148 if (in6p->in6p_lport || !IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) 149 return(EINVAL); 150 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 151 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 152 (so->so_options & SO_ACCEPTCONN) == 0)) 153 wild = IN6PLOOKUP_WILDCARD; 154 if (nam) { 155 sin6 = mtod(nam, struct sockaddr_in6 *); 156 if (nam->m_len != sizeof(*sin6)) 157 return(EINVAL); 158 /* 159 * We should check the family, but old programs 160 * incorrectly fail to intialize it. 161 */ 162 if (sin6->sin6_family != AF_INET6) 163 return(EAFNOSUPPORT); 164 165 /* 166 * If the scope of the destination is link-local, embed the 167 * interface index in the address. 168 */ 169 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 170 /* XXX boundary check is assumed to be already done. */ 171 /* XXX sin6_scope_id is weaker than advanced-api. */ 172 struct in6_pktinfo *pi; 173 if (in6p->in6p_outputopts && 174 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 175 pi->ipi6_ifindex) { 176 sin6->sin6_addr.s6_addr16[1] 177 = htons(pi->ipi6_ifindex); 178 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 179 && in6p->in6p_moptions 180 && in6p->in6p_moptions->im6o_multicast_ifp) { 181 sin6->sin6_addr.s6_addr16[1] = 182 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 183 } else if (sin6->sin6_scope_id) { 184 /* boundary check */ 185 if (sin6->sin6_scope_id < 0 186 || if_index < sin6->sin6_scope_id) { 187 return ENXIO; /* XXX EINVAL? */ 188 } 189 sin6->sin6_addr.s6_addr16[1] 190 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 191 /* this must be cleared for ifa_ifwithaddr() */ 192 sin6->sin6_scope_id = 0; 193 } 194 } 195 196 lport = sin6->sin6_port; 197 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 198 /* 199 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 200 * allow compepte duplication of binding if 201 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 202 * and a multicast address is bound on both 203 * new and duplicated sockets. 204 */ 205 if (so->so_options & SO_REUSEADDR) 206 reuseport = SO_REUSEADDR|SO_REUSEPORT; 207 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 208 struct sockaddr_in sin; 209 210 bzero(&sin, sizeof(sin)); 211 sin.sin_len = sizeof(sin); 212 sin.sin_family = AF_INET; 213 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 214 sizeof(sin.sin_addr)); 215 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 216 return EADDRNOTAVAIL; 217 } else if (!IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 218 struct ifaddr *ia = NULL; 219 220 sin6->sin6_port = 0; /* yech... */ 221 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 222 return(EADDRNOTAVAIL); 223 224 /* 225 * XXX: bind to an anycast address might accidentally 226 * cause sending a packet with anycast source address. 227 */ 228 if (ia && 229 ((struct in6_ifaddr *)ia)->ia6_flags & 230 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 231 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 232 return(EADDRNOTAVAIL); 233 } 234 } 235 if (lport) { 236 /* GROSS */ 237 if (ntohs(lport) < IPV6PORT_RESERVED && 238 (error = suser(p->p_ucred, &p->p_acflag))) 239 return(EACCES); 240 241 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 242 /* should check this but we can't ... */ 243 #if 0 244 struct inpcb *t; 245 246 t = in_pcblookup_bind(&tcbtable, 247 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 248 lport); 249 if (t && (reuseport & t->inp_socket->so_options) == 0) 250 return EADDRINUSE; 251 #endif 252 } else { 253 struct in6pcb *t; 254 255 t = in6_pcblookup(head, &zeroin6_addr, 0, 256 &sin6->sin6_addr, lport, wild); 257 if (t && (reuseport & t->in6p_socket->so_options) == 0) 258 return(EADDRINUSE); 259 } 260 } 261 in6p->in6p_laddr = sin6->sin6_addr; 262 } 263 if (lport == 0) { 264 u_short last_port; 265 void *t; 266 267 /* XXX IN6P_LOWPORT */ 268 269 /* value out of range */ 270 if (head->in6p_lport < IPV6PORT_ANONMIN) 271 head->in6p_lport = IPV6PORT_ANONMIN; 272 else if (head->in6p_lport > IPV6PORT_ANONMAX) 273 head->in6p_lport = IPV6PORT_ANONMIN; 274 last_port = head->in6p_lport; 275 goto startover; /*to randomize*/ 276 for (;;) { 277 lport = htons(head->in6p_lport); 278 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 279 #if 0 280 t = in_pcblookup_bind(&tcbtable, 281 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 282 lport); 283 #else 284 t = NULL; 285 #endif 286 } else { 287 t = in6_pcblookup(head, &zeroin6_addr, 0, 288 &in6p->in6p_laddr, lport, wild); 289 } 290 if (t == 0) 291 break; 292 startover: 293 if (head->in6p_lport >= IPV6PORT_ANONMAX) 294 head->in6p_lport = IPV6PORT_ANONMIN; 295 else 296 head->in6p_lport++; 297 if (head->in6p_lport == last_port) 298 return (EADDRINUSE); 299 } 300 } 301 in6p->in6p_lport = lport; 302 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 303 return(0); 304 } 305 306 /* 307 * Connect from a socket to a specified address. 308 * Both address and port must be specified in argument sin6. 309 * If don't have a local address for this socket yet, 310 * then pick one. 311 */ 312 int 313 in6_pcbconnect(in6p, nam) 314 struct in6pcb *in6p; 315 struct mbuf *nam; 316 { 317 struct in6_addr *in6a = NULL; 318 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 319 struct in6_pktinfo *pi; 320 struct ifnet *ifp = NULL; /* outgoing interface */ 321 int error = 0; 322 struct in6_addr mapped; 323 324 (void)&in6a; /* XXX fool gcc */ 325 326 if (nam->m_len != sizeof(*sin6)) 327 return(EINVAL); 328 if (sin6->sin6_family != AF_INET6) 329 return(EAFNOSUPPORT); 330 if (sin6->sin6_port == 0) 331 return(EADDRNOTAVAIL); 332 333 /* sanity check for mapped address case */ 334 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 335 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 336 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 337 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 338 return EINVAL; 339 } else { 340 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 341 return EINVAL; 342 } 343 344 /* 345 * If the scope of the destination is link-local, embed the interface 346 * index in the address. 347 */ 348 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 349 /* XXX boundary check is assumed to be already done. */ 350 /* XXX sin6_scope_id is weaker than advanced-api. */ 351 if (in6p->in6p_outputopts && 352 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 353 pi->ipi6_ifindex) { 354 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 355 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 356 } 357 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 358 in6p->in6p_moptions && 359 in6p->in6p_moptions->im6o_multicast_ifp) { 360 sin6->sin6_addr.s6_addr16[1] = 361 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 362 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 363 } else if (sin6->sin6_scope_id) { 364 /* boundary check */ 365 if (sin6->sin6_scope_id < 0 366 || if_index < sin6->sin6_scope_id) { 367 return ENXIO; /* XXX EINVAL? */ 368 } 369 sin6->sin6_addr.s6_addr16[1] 370 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 371 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 372 } 373 } 374 375 /* Source address selection. */ 376 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 377 && in6p->in6p_laddr.s6_addr32[3] == 0) { 378 struct sockaddr_in sin, *sinp; 379 380 bzero(&sin, sizeof(sin)); 381 sin.sin_len = sizeof(sin); 382 sin.sin_family = AF_INET; 383 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 384 sizeof(sin.sin_addr)); 385 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 386 in6p->in6p_socket->so_options, NULL, &error); 387 if (sinp == 0) { 388 if (error == 0) 389 error = EADDRNOTAVAIL; 390 return(error); 391 } 392 bzero(&mapped, sizeof(mapped)); 393 mapped.s6_addr16[5] = htons(0xffff); 394 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 395 in6a = &mapped; 396 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 397 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 398 in6p->in6p_moptions, &in6p->in6p_route, 399 &error); 400 if (in6a == 0) { 401 if (error == 0) 402 error = EADDRNOTAVAIL; 403 return(error); 404 } 405 } 406 if (in6p->in6p_route.ro_rt) 407 ifp = in6p->in6p_route.ro_rt->rt_ifp; 408 409 /* 410 * Default hop limit selection. If a hoplimit was specified via ioctl, 411 * use it. Else if the outgoing interface is detected and the current 412 * hop limit of the interface was specified by router advertisement, 413 * use the value. 414 * Otherwise, use the system default hoplimit. 415 */ 416 if (in6p->in6p_hops >= 0) 417 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 418 else if (ifp) 419 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 420 else 421 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 422 423 if (in6_pcblookup(in6p->in6p_head, 424 &sin6->sin6_addr, 425 sin6->sin6_port, 426 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 427 in6a : &in6p->in6p_laddr, 428 in6p->in6p_lport, 429 0)) 430 return(EADDRINUSE); 431 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 432 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 433 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 434 if (in6p->in6p_lport == 0) 435 (void)in6_pcbbind(in6p, (struct mbuf *)0); 436 in6p->in6p_laddr = *in6a; 437 } 438 in6p->in6p_faddr = sin6->sin6_addr; 439 in6p->in6p_fport = sin6->sin6_port; 440 /* 441 * xxx kazu flowlabel is necessary for connect? 442 * but if this line is missing, the garbage value remains. 443 */ 444 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 445 return(0); 446 } 447 448 /* 449 * Return an IPv6 address, which is the most appropriate for given 450 * destination and user specified options. 451 * If necessary, this function lookups the routing table and return 452 * an entry to the caller for later use. 453 */ 454 struct in6_addr * 455 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 456 struct sockaddr_in6 *dstsock; 457 struct ip6_pktopts *opts; 458 struct ip6_moptions *mopts; 459 struct route_in6 *ro; 460 int *errorp; 461 { 462 struct in6_addr *dst; 463 struct in6_ifaddr *ia6 = 0; 464 struct in6_pktinfo *pi; 465 466 dst = &dstsock->sin6_addr; 467 *errorp = 0; 468 469 /* 470 * If the source address is explicitly specified by the caller, 471 * use it. 472 * If the caller doesn't specify the source address but 473 * the outgoing interface, use an address associated with 474 * the interface. 475 */ 476 if (opts && (pi = opts->ip6po_pktinfo)) { 477 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 478 return(&pi->ipi6_addr); 479 else if (pi->ipi6_ifindex) { 480 /* XXX boundary check is assumed to be already done. */ 481 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 482 dst); 483 if (ia6 == 0) { 484 *errorp = EADDRNOTAVAIL; 485 return(0); 486 } 487 return(&satosin6(&ia6->ia_addr)->sin6_addr); 488 } 489 } 490 491 /* 492 * If the destination address is a multicast address and 493 * the outgoing interface for the address is specified 494 * by the caller, use an address associated with the interface. 495 * There is a sanity check here; if the destination has node-local 496 * scope, the outgoing interfacde should be a loopback address. 497 * Even if the outgoing interface is not specified, we also 498 * choose a loopback interface as the outgoing interface. 499 */ 500 if (IN6_IS_ADDR_MULTICAST(dst)) { 501 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 502 #ifdef __bsdi__ 503 extern struct ifnet loif; 504 #endif 505 506 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 507 #ifdef __bsdi__ 508 ifp = &loif; 509 #else 510 ifp = &loif[0]; 511 #endif 512 } 513 514 if (ifp) { 515 ia6 = in6_ifawithscope(ifp, dst); 516 if (ia6 == 0) { 517 *errorp = EADDRNOTAVAIL; 518 return(0); 519 } 520 return(&satosin6(&ia6->ia_addr)->sin6_addr); 521 } 522 } 523 524 /* 525 * XXX How should we use sin6_scope_id??? 526 */ 527 528 /* 529 * If the next hop address for the packet is specified 530 * by caller, use an address associated with the route 531 * to the next hop. 532 */ 533 { 534 struct sockaddr_in6 *sin6_next; 535 struct rtentry *rt; 536 537 if (opts && opts->ip6po_nexthop) { 538 sin6_next = satosin6(opts->ip6po_nexthop); 539 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 540 if (rt) { 541 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 542 if (ia6 == 0) 543 ia6 = ifatoia6(rt->rt_ifa); 544 } 545 if (ia6 == 0) { 546 *errorp = EADDRNOTAVAIL; 547 return(0); 548 } 549 return(&satosin6(&ia6->ia_addr)->sin6_addr); 550 } 551 } 552 553 /* 554 * If route is known or can be allocated now, 555 * our src addr is taken from the i/f, else punt. 556 */ 557 if (ro) { 558 if (ro->ro_rt && 559 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 560 RTFREE(ro->ro_rt); 561 ro->ro_rt = (struct rtentry *)0; 562 } 563 if (ro->ro_rt == (struct rtentry *)0 || 564 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 565 /* No route yet, so try to acquire one */ 566 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 567 ro->ro_dst.sin6_family = AF_INET6; 568 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 569 ro->ro_dst.sin6_addr = *dst; 570 if (IN6_IS_ADDR_MULTICAST(dst)) { 571 #ifdef __FreeBSD__ 572 ro->ro_rt = rtalloc1(&((struct route *)ro) 573 ->ro_dst, 0, 0UL); 574 #endif /*__FreeBSD__*/ 575 #if defined(__bsdi__) || defined(__NetBSD__) 576 ro->ro_rt = rtalloc1(&((struct route *)ro) 577 ->ro_dst, 0); 578 #endif /*__bsdi__*/ 579 } else { 580 #if 0 /* XXX Is this correct? */ 581 rtcalloc((struct route *)ro); 582 #else 583 rtalloc((struct route *)ro); 584 #endif 585 } 586 } 587 588 /* 589 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 590 * the address. But we don't know why it does so. 591 * It is necessary to ensure the scope even for lo0 592 * so doesn't check out IFF_LOOPBACK. 593 */ 594 595 if (ro->ro_rt) { 596 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 597 if (ia6 == 0) /* xxx scope error ?*/ 598 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 599 } 600 #if 0 601 /* 602 * xxx The followings are necessary? (kazu) 603 * I don't think so. 604 * It's for SO_DONTROUTE option in IPv4.(jinmei) 605 */ 606 if (ia6 == 0) { 607 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 608 609 sin6->sin6_addr = *dst; 610 611 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 612 if (ia6 == 0) 613 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 614 if (ia6 == 0) 615 return(0); 616 return(&satosin6(&ia6->ia_addr)->sin6_addr); 617 } 618 #endif /* 0 */ 619 if (ia6 == 0) { 620 *errorp = EHOSTUNREACH; /* no route */ 621 return(0); 622 } 623 return(&satosin6(&ia6->ia_addr)->sin6_addr); 624 } 625 626 *errorp = EADDRNOTAVAIL; 627 return(0); 628 } 629 630 void 631 in6_pcbdisconnect(in6p) 632 struct in6pcb *in6p; 633 { 634 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 635 in6p->in6p_fport = 0; 636 if (in6p->in6p_socket->so_state & SS_NOFDREF) 637 in6_pcbdetach(in6p); 638 } 639 640 void 641 in6_pcbdetach(in6p) 642 struct in6pcb *in6p; 643 { 644 struct socket *so = in6p->in6p_socket; 645 646 #ifdef IPSEC 647 if (sotoin6pcb(so) != 0) 648 key_freeso(so); 649 ipsec6_delete_pcbpolicy(in6p); 650 #endif /* IPSEC */ 651 sotoin6pcb(so) = 0; 652 sofree(so); 653 if (in6p->in6p_options) 654 m_freem(in6p->in6p_options); 655 if (in6p->in6p_outputopts) { 656 if (in6p->in6p_outputopts->ip6po_rthdr && 657 in6p->in6p_outputopts->ip6po_route.ro_rt) 658 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 659 if (in6p->in6p_outputopts->ip6po_m) 660 (void)m_free(in6p->in6p_outputopts->ip6po_m); 661 free(in6p->in6p_outputopts, M_IP6OPT); 662 } 663 if (in6p->in6p_route.ro_rt) 664 rtfree(in6p->in6p_route.ro_rt); 665 ip6_freemoptions(in6p->in6p_moptions); 666 #if 0 667 remque(in6p); 668 #else 669 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 670 in6p->in6p_prev->in6p_next = in6p->in6p_next; 671 in6p->in6p_prev = NULL; 672 #endif 673 FREE(in6p, M_PCB); 674 } 675 676 void 677 in6_setsockaddr(in6p, nam) 678 struct in6pcb *in6p; 679 struct mbuf *nam; 680 { 681 struct sockaddr_in6 *sin6; 682 683 nam->m_len = sizeof(*sin6); 684 sin6 = mtod(nam, struct sockaddr_in6 *); 685 bzero((caddr_t)sin6, sizeof(*sin6)); 686 sin6->sin6_family = AF_INET6; 687 sin6->sin6_len = sizeof(struct sockaddr_in6); 688 sin6->sin6_port = in6p->in6p_lport; 689 sin6->sin6_addr = in6p->in6p_laddr; 690 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 691 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 692 else 693 sin6->sin6_scope_id = 0; /*XXX*/ 694 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 695 sin6->sin6_addr.s6_addr16[1] = 0; 696 } 697 698 void 699 in6_setpeeraddr(in6p, nam) 700 struct in6pcb *in6p; 701 struct mbuf *nam; 702 { 703 struct sockaddr_in6 *sin6; 704 705 nam->m_len = sizeof(*sin6); 706 sin6 = mtod(nam, struct sockaddr_in6 *); 707 bzero((caddr_t)sin6, sizeof(*sin6)); 708 sin6->sin6_family = AF_INET6; 709 sin6->sin6_len = sizeof(struct sockaddr_in6); 710 sin6->sin6_port = in6p->in6p_fport; 711 sin6->sin6_addr = in6p->in6p_faddr; 712 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 713 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 714 else 715 sin6->sin6_scope_id = 0; /*XXX*/ 716 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 717 sin6->sin6_addr.s6_addr16[1] = 0; 718 } 719 720 /* 721 * Pass some notification to all connections of a protocol 722 * associated with address dst. The local address and/or port numbers 723 * may be specified to limit the search. The "usual action" will be 724 * taken, depending on the ctlinput cmd. The caller must filter any 725 * cmds that are uninteresting (e.g., no error in the map). 726 * Call the protocol specific routine (if any) to report 727 * any errors for each matching socket. 728 * 729 * Must be called at splsoftnet. 730 */ 731 int 732 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 733 struct in6pcb *head; 734 struct sockaddr *dst; 735 u_int fport_arg, lport_arg; 736 struct in6_addr *laddr6; 737 int cmd; 738 void (*notify) __P((struct in6pcb *, int)); 739 { 740 struct in6pcb *in6p, *oin6p; 741 struct in6_addr faddr6; 742 u_short fport = fport_arg, lport = lport_arg; 743 int errno; 744 int nmatch = 0; 745 746 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 747 return 0; 748 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 749 if (IN6_IS_ADDR_ANY(&faddr6)) 750 return 0; 751 752 /* 753 * Redirects go to all references to the destination, 754 * and use in_rtchange to invalidate the route cache. 755 * Dead host indications: notify all references to the destination. 756 * Otherwise, if we have knowledge of the local port and address, 757 * deliver only to that socket. 758 */ 759 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 760 fport = 0; 761 lport = 0; 762 bzero((caddr_t)laddr6, sizeof(*laddr6)); 763 if (cmd != PRC_HOSTDEAD) 764 notify = in6_rtchange; 765 } 766 if (notify == NULL) 767 return 0; 768 errno = inet6ctlerrmap[cmd]; 769 for (in6p = head->in6p_next; in6p != head;) { 770 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 771 in6p->in6p_socket == 0 || 772 (lport && in6p->in6p_lport != lport) || 773 (!IN6_IS_ADDR_ANY(laddr6) && 774 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 775 (fport && in6p->in6p_fport != fport)) { 776 in6p = in6p->in6p_next; 777 continue; 778 } 779 oin6p = in6p; 780 in6p = in6p->in6p_next; 781 (*notify)(oin6p, errno); 782 nmatch++; 783 } 784 return nmatch; 785 } 786 787 /* 788 * Check for alternatives when higher level complains 789 * about service problems. For now, invalidate cached 790 * routing information. If the route was created dynamically 791 * (by a redirect), time to try a default gateway again. 792 */ 793 void 794 in6_losing(in6p) 795 struct in6pcb *in6p; 796 { 797 struct rtentry *rt; 798 struct rt_addrinfo info; 799 800 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 801 in6p->in6p_route.ro_rt = 0; 802 bzero((caddr_t)&info, sizeof(info)); 803 info.rti_info[RTAX_DST] = 804 (struct sockaddr *)&in6p->in6p_route.ro_dst; 805 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 806 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 807 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 808 if (rt->rt_flags & RTF_DYNAMIC) 809 (void)rtrequest(RTM_DELETE, rt_key(rt), 810 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 811 (struct rtentry **)0); 812 else 813 /* 814 * A new route can be allocated 815 * the next time output is attempted. 816 */ 817 rtfree(rt); 818 } 819 } 820 821 /* 822 * After a routing change, flush old routing 823 * and allocate a (hopefully) better one. 824 */ 825 void 826 in6_rtchange(in6p, errno) 827 struct in6pcb *in6p; 828 int errno; 829 { 830 if (in6p->in6p_route.ro_rt) { 831 rtfree(in6p->in6p_route.ro_rt); 832 in6p->in6p_route.ro_rt = 0; 833 /* 834 * A new route can be allocated the next time 835 * output is attempted. 836 */ 837 } 838 } 839 840 struct in6pcb * 841 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 842 struct in6pcb *head; 843 struct in6_addr *faddr6, *laddr6; 844 u_int fport_arg, lport_arg; 845 int flags; 846 { 847 struct in6pcb *in6p, *match = 0; 848 int matchwild = 3, wildcard; 849 u_short fport = fport_arg, lport = lport_arg; 850 851 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 852 if (in6p->in6p_lport != lport) 853 continue; 854 wildcard = 0; 855 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 856 if (IN6_IS_ADDR_ANY(laddr6)) 857 wildcard++; 858 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 859 continue; 860 } else { 861 if (!IN6_IS_ADDR_ANY(laddr6)) 862 wildcard++; 863 } 864 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 865 if (IN6_IS_ADDR_ANY(faddr6)) 866 wildcard++; 867 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 868 || in6p->in6p_fport != fport) 869 continue; 870 } else { 871 if (!IN6_IS_ADDR_ANY(faddr6)) 872 wildcard++; 873 } 874 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 875 continue; 876 if (wildcard < matchwild) { 877 match = in6p; 878 matchwild = wildcard; 879 if (matchwild == 0) 880 break; 881 } 882 } 883 return(match); 884 } 885 886 #ifndef TCP6 887 struct rtentry * 888 in6_pcbrtentry(in6p) 889 struct in6pcb *in6p; 890 { 891 struct route_in6 *ro; 892 893 ro = &in6p->in6p_route; 894 895 if (ro->ro_rt == NULL) { 896 /* 897 * No route yet, so try to acquire one. 898 */ 899 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 900 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 901 ro->ro_dst.sin6_family = AF_INET6; 902 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 903 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 904 rtalloc((struct route *)ro); 905 } 906 } 907 return (ro->ro_rt); 908 } 909 910 struct in6pcb * 911 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 912 struct in6pcb *head; 913 struct in6_addr *faddr6, *laddr6; 914 u_int fport_arg, lport_arg; 915 int faith; 916 { 917 struct in6pcb *in6p; 918 u_short fport = fport_arg, lport = lport_arg; 919 920 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 921 #if defined(NFAITH) && NFAITH > 0 922 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 923 continue; 924 #endif 925 /* find exact match on both source and dest */ 926 if (in6p->in6p_fport != fport) 927 continue; 928 if (in6p->in6p_lport != lport) 929 continue; 930 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 931 continue; 932 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 933 continue; 934 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 935 continue; 936 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 937 continue; 938 return in6p; 939 } 940 return NULL; 941 } 942 943 struct in6pcb * 944 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 945 struct in6pcb *head; 946 struct in6_addr *laddr6; 947 u_int lport_arg; 948 int faith; 949 { 950 struct in6pcb *in6p, *match; 951 u_short lport = lport_arg; 952 953 match = NULL; 954 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 955 /* 956 * find destination match. exact match is preferred 957 * against wildcard match. 958 */ 959 #if defined(NFAITH) && NFAITH > 0 960 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 961 continue; 962 #endif 963 if (in6p->in6p_fport != 0) 964 continue; 965 if (in6p->in6p_lport != lport) 966 continue; 967 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 968 match = in6p; 969 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 970 return in6p; 971 } 972 return match; 973 } 974 #endif 975
Indexes created Tue Sep 23 23:09:58 GMT 2025