in6_pcb.c revision 1.9
1 /* $NetBSD: in6_pcb.c,v 1.9 1999/07/31 18:41:16 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 #ifdef __NetBSD__ /*XXX*/ 68 #include "opt_ipsec.h" 69 #endif 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/ioctl.h> 79 #include <sys/errno.h> 80 #include <sys/time.h> 81 #include <sys/proc.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet6/ip6.h> 92 #include <netinet6/in6_pcb.h> 93 #include <netinet6/ip6_var.h> 94 #include <netinet6/nd6.h> 95 96 #include "loop.h" 97 #ifdef __NetBSD__ 98 extern struct ifnet loif[NLOOP]; 99 #endif 100 #include "faith.h" 101 102 #ifdef IPSEC 103 #include <netinet6/ipsec.h> 104 #include <netkey/key.h> 105 #include <netkey/key_debug.h> 106 #endif /* IPSEC */ 107 108 struct in6_addr zeroin6_addr; 109 110 int 111 in6_pcballoc(so, head) 112 struct socket *so; 113 struct in6pcb *head; 114 { 115 struct in6pcb *in6p; 116 117 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 118 if (in6p == NULL) 119 return(ENOBUFS); 120 bzero((caddr_t)in6p, sizeof(*in6p)); 121 in6p->in6p_head = head; 122 in6p->in6p_socket = so; 123 in6p->in6p_hops = -1; /* use kernel default */ 124 in6p->in6p_icmp6filt = NULL; 125 #if 0 126 insque(in6p, head); 127 #else 128 in6p->in6p_next = head->in6p_next; 129 head->in6p_next = in6p; 130 in6p->in6p_prev = head; 131 in6p->in6p_next->in6p_prev = in6p; 132 #endif 133 so->so_pcb = (caddr_t)in6p; 134 return(0); 135 } 136 137 int 138 in6_pcbbind(in6p, nam) 139 register struct in6pcb *in6p; 140 struct mbuf *nam; 141 { 142 struct socket *so = in6p->in6p_socket; 143 struct in6pcb *head = in6p->in6p_head; 144 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 145 struct proc *p = curproc; /* XXX */ 146 u_short lport = 0; 147 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 148 int error; 149 150 if (in6p->in6p_lport || !IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) 151 return(EINVAL); 152 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 153 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 154 (so->so_options & SO_ACCEPTCONN) == 0)) 155 wild = IN6PLOOKUP_WILDCARD; 156 if (nam) { 157 sin6 = mtod(nam, struct sockaddr_in6 *); 158 if (nam->m_len != sizeof(*sin6)) 159 return(EINVAL); 160 /* 161 * We should check the family, but old programs 162 * incorrectly fail to intialize it. 163 */ 164 if (sin6->sin6_family != AF_INET6) 165 return(EAFNOSUPPORT); 166 167 /* 168 * If the scope of the destination is link-local, embed the 169 * interface index in the address. 170 */ 171 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 172 /* XXX boundary check is assumed to be already done. */ 173 /* XXX sin6_scope_id is weaker than advanced-api. */ 174 struct in6_pktinfo *pi; 175 if (in6p->in6p_outputopts && 176 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 177 pi->ipi6_ifindex) { 178 sin6->sin6_addr.s6_addr16[1] 179 = htons(pi->ipi6_ifindex); 180 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 181 && in6p->in6p_moptions 182 && in6p->in6p_moptions->im6o_multicast_ifp) { 183 sin6->sin6_addr.s6_addr16[1] = 184 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 185 } else if (sin6->sin6_scope_id) { 186 /* boundary check */ 187 if (sin6->sin6_scope_id < 0 188 || if_index < sin6->sin6_scope_id) { 189 return ENXIO; /* XXX EINVAL? */ 190 } 191 sin6->sin6_addr.s6_addr16[1] 192 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 193 /* this must be cleared for ifa_ifwithaddr() */ 194 sin6->sin6_scope_id = 0; 195 } 196 } 197 198 lport = sin6->sin6_port; 199 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 200 /* 201 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 202 * allow compepte duplication of binding if 203 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 204 * and a multicast address is bound on both 205 * new and duplicated sockets. 206 */ 207 if (so->so_options & SO_REUSEADDR) 208 reuseport = SO_REUSEADDR|SO_REUSEPORT; 209 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 210 struct sockaddr_in sin; 211 212 bzero(&sin, sizeof(sin)); 213 sin.sin_len = sizeof(sin); 214 sin.sin_family = AF_INET; 215 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 216 sizeof(sin.sin_addr)); 217 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 218 return EADDRNOTAVAIL; 219 } else if (!IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 220 struct ifaddr *ia = NULL; 221 222 sin6->sin6_port = 0; /* yech... */ 223 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 224 return(EADDRNOTAVAIL); 225 226 /* 227 * XXX: bind to an anycast address might accidentally 228 * cause sending a packet with anycast source address. 229 */ 230 if (ia && 231 ((struct in6_ifaddr *)ia)->ia6_flags & 232 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 233 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 234 return(EADDRNOTAVAIL); 235 } 236 } 237 if (lport) { 238 /* GROSS */ 239 if (ntohs(lport) < IPV6PORT_RESERVED && 240 (error = suser(p->p_ucred, &p->p_acflag))) 241 return(EACCES); 242 243 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 244 /* should check this but we can't ... */ 245 #if 0 246 struct inpcb *t; 247 248 t = in_pcblookup_bind(&tcbtable, 249 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 250 lport); 251 if (t && (reuseport & t->inp_socket->so_options) == 0) 252 return EADDRINUSE; 253 #endif 254 } else { 255 struct in6pcb *t; 256 257 t = in6_pcblookup(head, &zeroin6_addr, 0, 258 &sin6->sin6_addr, lport, wild); 259 if (t && (reuseport & t->in6p_socket->so_options) == 0) 260 return(EADDRINUSE); 261 } 262 } 263 in6p->in6p_laddr = sin6->sin6_addr; 264 } 265 if (lport == 0) { 266 u_short last_port; 267 void *t; 268 269 /* XXX IN6P_LOWPORT */ 270 271 /* value out of range */ 272 if (head->in6p_lport < IPV6PORT_ANONMIN) 273 head->in6p_lport = IPV6PORT_ANONMIN; 274 else if (head->in6p_lport > IPV6PORT_ANONMAX) 275 head->in6p_lport = IPV6PORT_ANONMIN; 276 last_port = head->in6p_lport; 277 goto startover; /*to randomize*/ 278 for (;;) { 279 lport = htons(head->in6p_lport); 280 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 281 #if 0 282 t = in_pcblookup_bind(&tcbtable, 283 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 284 lport); 285 #else 286 t = NULL; 287 #endif 288 } else { 289 t = in6_pcblookup(head, &zeroin6_addr, 0, 290 &in6p->in6p_laddr, lport, wild); 291 } 292 if (t == 0) 293 break; 294 startover: 295 if (head->in6p_lport >= IPV6PORT_ANONMAX) 296 head->in6p_lport = IPV6PORT_ANONMIN; 297 else 298 head->in6p_lport++; 299 if (head->in6p_lport == last_port) 300 return (EADDRINUSE); 301 } 302 } 303 in6p->in6p_lport = lport; 304 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 305 return(0); 306 } 307 308 /* 309 * Connect from a socket to a specified address. 310 * Both address and port must be specified in argument sin6. 311 * If don't have a local address for this socket yet, 312 * then pick one. 313 */ 314 int 315 in6_pcbconnect(in6p, nam) 316 struct in6pcb *in6p; 317 struct mbuf *nam; 318 { 319 struct in6_addr *in6a = NULL; 320 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 321 struct in6_pktinfo *pi; 322 struct ifnet *ifp = NULL; /* outgoing interface */ 323 int error = 0; 324 struct in6_addr mapped; 325 326 (void)&in6a; /* XXX fool gcc */ 327 328 if (nam->m_len != sizeof(*sin6)) 329 return(EINVAL); 330 if (sin6->sin6_family != AF_INET6) 331 return(EAFNOSUPPORT); 332 if (sin6->sin6_port == 0) 333 return(EADDRNOTAVAIL); 334 335 /* sanity check for mapped address case */ 336 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 337 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 338 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 339 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 340 return EINVAL; 341 } else { 342 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 343 return EINVAL; 344 } 345 346 /* 347 * If the scope of the destination is link-local, embed the interface 348 * index in the address. 349 */ 350 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 351 /* XXX boundary check is assumed to be already done. */ 352 /* XXX sin6_scope_id is weaker than advanced-api. */ 353 if (in6p->in6p_outputopts && 354 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 355 pi->ipi6_ifindex) { 356 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 357 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 358 } 359 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 360 in6p->in6p_moptions && 361 in6p->in6p_moptions->im6o_multicast_ifp) { 362 sin6->sin6_addr.s6_addr16[1] = 363 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 364 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 365 } else if (sin6->sin6_scope_id) { 366 /* boundary check */ 367 if (sin6->sin6_scope_id < 0 368 || if_index < sin6->sin6_scope_id) { 369 return ENXIO; /* XXX EINVAL? */ 370 } 371 sin6->sin6_addr.s6_addr16[1] 372 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 373 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 374 } 375 } 376 377 /* Source address selection. */ 378 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 379 && in6p->in6p_laddr.s6_addr32[3] == 0) { 380 struct sockaddr_in sin, *sinp; 381 382 bzero(&sin, sizeof(sin)); 383 sin.sin_len = sizeof(sin); 384 sin.sin_family = AF_INET; 385 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 386 sizeof(sin.sin_addr)); 387 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 388 in6p->in6p_socket->so_options, NULL, &error); 389 if (sinp == 0) { 390 if (error == 0) 391 error = EADDRNOTAVAIL; 392 return(error); 393 } 394 bzero(&mapped, sizeof(mapped)); 395 mapped.s6_addr16[5] = htons(0xffff); 396 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 397 in6a = &mapped; 398 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 399 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 400 in6p->in6p_moptions, &in6p->in6p_route, 401 &error); 402 if (in6a == 0) { 403 if (error == 0) 404 error = EADDRNOTAVAIL; 405 return(error); 406 } 407 } 408 if (in6p->in6p_route.ro_rt) 409 ifp = in6p->in6p_route.ro_rt->rt_ifp; 410 411 /* 412 * Default hop limit selection. If a hoplimit was specified via ioctl, 413 * use it. Else if the outgoing interface is detected and the current 414 * hop limit of the interface was specified by router advertisement, 415 * use the value. 416 * Otherwise, use the system default hoplimit. 417 */ 418 if (in6p->in6p_hops >= 0) 419 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 420 else if (ifp) 421 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 422 else 423 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 424 425 if (in6_pcblookup(in6p->in6p_head, 426 &sin6->sin6_addr, 427 sin6->sin6_port, 428 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 429 in6a : &in6p->in6p_laddr, 430 in6p->in6p_lport, 431 0)) 432 return(EADDRINUSE); 433 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 434 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 435 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 436 if (in6p->in6p_lport == 0) 437 (void)in6_pcbbind(in6p, (struct mbuf *)0); 438 in6p->in6p_laddr = *in6a; 439 } 440 in6p->in6p_faddr = sin6->sin6_addr; 441 in6p->in6p_fport = sin6->sin6_port; 442 /* 443 * xxx kazu flowlabel is necessary for connect? 444 * but if this line is missing, the garbage value remains. 445 */ 446 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 447 return(0); 448 } 449 450 /* 451 * Return an IPv6 address, which is the most appropriate for given 452 * destination and user specified options. 453 * If necessary, this function lookups the routing table and return 454 * an entry to the caller for later use. 455 */ 456 struct in6_addr * 457 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 458 struct sockaddr_in6 *dstsock; 459 struct ip6_pktopts *opts; 460 struct ip6_moptions *mopts; 461 struct route_in6 *ro; 462 int *errorp; 463 { 464 struct in6_addr *dst; 465 struct in6_ifaddr *ia6 = 0; 466 struct in6_pktinfo *pi; 467 468 dst = &dstsock->sin6_addr; 469 *errorp = 0; 470 471 /* 472 * If the source address is explicitly specified by the caller, 473 * use it. 474 * If the caller doesn't specify the source address but 475 * the outgoing interface, use an address associated with 476 * the interface. 477 */ 478 if (opts && (pi = opts->ip6po_pktinfo)) { 479 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 480 return(&pi->ipi6_addr); 481 else if (pi->ipi6_ifindex) { 482 /* XXX boundary check is assumed to be already done. */ 483 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 484 dst); 485 if (ia6 == 0) { 486 *errorp = EADDRNOTAVAIL; 487 return(0); 488 } 489 return(&satosin6(&ia6->ia_addr)->sin6_addr); 490 } 491 } 492 493 /* 494 * If the destination address is a multicast address and 495 * the outgoing interface for the address is specified 496 * by the caller, use an address associated with the interface. 497 * There is a sanity check here; if the destination has node-local 498 * scope, the outgoing interfacde should be a loopback address. 499 * Even if the outgoing interface is not specified, we also 500 * choose a loopback interface as the outgoing interface. 501 */ 502 if (IN6_IS_ADDR_MULTICAST(dst)) { 503 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 504 #ifdef __bsdi__ 505 extern struct ifnet loif; 506 #endif 507 508 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 509 #ifdef __bsdi__ 510 ifp = &loif; 511 #else 512 ifp = &loif[0]; 513 #endif 514 } 515 516 if (ifp) { 517 ia6 = in6_ifawithscope(ifp, dst); 518 if (ia6 == 0) { 519 *errorp = EADDRNOTAVAIL; 520 return(0); 521 } 522 return(&satosin6(&ia6->ia_addr)->sin6_addr); 523 } 524 } 525 526 /* 527 * XXX How should we use sin6_scope_id??? 528 */ 529 530 /* 531 * If the next hop address for the packet is specified 532 * by caller, use an address associated with the route 533 * to the next hop. 534 */ 535 { 536 struct sockaddr_in6 *sin6_next; 537 struct rtentry *rt; 538 539 if (opts && opts->ip6po_nexthop) { 540 sin6_next = satosin6(opts->ip6po_nexthop); 541 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 542 if (rt) { 543 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 544 if (ia6 == 0) 545 ia6 = ifatoia6(rt->rt_ifa); 546 } 547 if (ia6 == 0) { 548 *errorp = EADDRNOTAVAIL; 549 return(0); 550 } 551 return(&satosin6(&ia6->ia_addr)->sin6_addr); 552 } 553 } 554 555 /* 556 * If route is known or can be allocated now, 557 * our src addr is taken from the i/f, else punt. 558 */ 559 if (ro) { 560 if (ro->ro_rt && 561 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 562 RTFREE(ro->ro_rt); 563 ro->ro_rt = (struct rtentry *)0; 564 } 565 if (ro->ro_rt == (struct rtentry *)0 || 566 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 567 /* No route yet, so try to acquire one */ 568 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 569 ro->ro_dst.sin6_family = AF_INET6; 570 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 571 ro->ro_dst.sin6_addr = *dst; 572 if (IN6_IS_ADDR_MULTICAST(dst)) { 573 #ifdef __FreeBSD__ 574 ro->ro_rt = rtalloc1(&((struct route *)ro) 575 ->ro_dst, 0, 0UL); 576 #endif /*__FreeBSD__*/ 577 #if defined(__bsdi__) || defined(__NetBSD__) 578 ro->ro_rt = rtalloc1(&((struct route *)ro) 579 ->ro_dst, 0); 580 #endif /*__bsdi__*/ 581 } else { 582 #if 0 /* XXX Is this correct? */ 583 rtcalloc((struct route *)ro); 584 #else 585 rtalloc((struct route *)ro); 586 #endif 587 } 588 } 589 590 /* 591 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 592 * the address. But we don't know why it does so. 593 * It is necessary to ensure the scope even for lo0 594 * so doesn't check out IFF_LOOPBACK. 595 */ 596 597 if (ro->ro_rt) { 598 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 599 if (ia6 == 0) /* xxx scope error ?*/ 600 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 601 } 602 #if 0 603 /* 604 * xxx The followings are necessary? (kazu) 605 * I don't think so. 606 * It's for SO_DONTROUTE option in IPv4.(jinmei) 607 */ 608 if (ia6 == 0) { 609 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 610 611 sin6->sin6_addr = *dst; 612 613 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 614 if (ia6 == 0) 615 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 616 if (ia6 == 0) 617 return(0); 618 return(&satosin6(&ia6->ia_addr)->sin6_addr); 619 } 620 #endif /* 0 */ 621 if (ia6 == 0) { 622 *errorp = EHOSTUNREACH; /* no route */ 623 return(0); 624 } 625 return(&satosin6(&ia6->ia_addr)->sin6_addr); 626 } 627 628 *errorp = EADDRNOTAVAIL; 629 return(0); 630 } 631 632 void 633 in6_pcbdisconnect(in6p) 634 struct in6pcb *in6p; 635 { 636 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 637 in6p->in6p_fport = 0; 638 if (in6p->in6p_socket->so_state & SS_NOFDREF) 639 in6_pcbdetach(in6p); 640 } 641 642 void 643 in6_pcbdetach(in6p) 644 struct in6pcb *in6p; 645 { 646 struct socket *so = in6p->in6p_socket; 647 648 #ifdef IPSEC 649 if (sotoin6pcb(so) != 0) 650 key_freeso(so); 651 ipsec6_delete_pcbpolicy(in6p); 652 #endif /* IPSEC */ 653 sotoin6pcb(so) = 0; 654 sofree(so); 655 if (in6p->in6p_options) 656 m_freem(in6p->in6p_options); 657 if (in6p->in6p_outputopts) { 658 if (in6p->in6p_outputopts->ip6po_rthdr && 659 in6p->in6p_outputopts->ip6po_route.ro_rt) 660 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 661 if (in6p->in6p_outputopts->ip6po_m) 662 (void)m_free(in6p->in6p_outputopts->ip6po_m); 663 free(in6p->in6p_outputopts, M_IP6OPT); 664 } 665 if (in6p->in6p_route.ro_rt) 666 rtfree(in6p->in6p_route.ro_rt); 667 ip6_freemoptions(in6p->in6p_moptions); 668 #if 0 669 remque(in6p); 670 #else 671 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 672 in6p->in6p_prev->in6p_next = in6p->in6p_next; 673 in6p->in6p_prev = NULL; 674 #endif 675 FREE(in6p, M_PCB); 676 } 677 678 void 679 in6_setsockaddr(in6p, nam) 680 struct in6pcb *in6p; 681 struct mbuf *nam; 682 { 683 struct sockaddr_in6 *sin6; 684 685 nam->m_len = sizeof(*sin6); 686 sin6 = mtod(nam, struct sockaddr_in6 *); 687 bzero((caddr_t)sin6, sizeof(*sin6)); 688 sin6->sin6_family = AF_INET6; 689 sin6->sin6_len = sizeof(struct sockaddr_in6); 690 sin6->sin6_port = in6p->in6p_lport; 691 sin6->sin6_addr = in6p->in6p_laddr; 692 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 693 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 694 else 695 sin6->sin6_scope_id = 0; /*XXX*/ 696 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 697 sin6->sin6_addr.s6_addr16[1] = 0; 698 } 699 700 void 701 in6_setpeeraddr(in6p, nam) 702 struct in6pcb *in6p; 703 struct mbuf *nam; 704 { 705 struct sockaddr_in6 *sin6; 706 707 nam->m_len = sizeof(*sin6); 708 sin6 = mtod(nam, struct sockaddr_in6 *); 709 bzero((caddr_t)sin6, sizeof(*sin6)); 710 sin6->sin6_family = AF_INET6; 711 sin6->sin6_len = sizeof(struct sockaddr_in6); 712 sin6->sin6_port = in6p->in6p_fport; 713 sin6->sin6_addr = in6p->in6p_faddr; 714 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 715 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 716 else 717 sin6->sin6_scope_id = 0; /*XXX*/ 718 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 719 sin6->sin6_addr.s6_addr16[1] = 0; 720 } 721 722 /* 723 * Pass some notification to all connections of a protocol 724 * associated with address dst. The local address and/or port numbers 725 * may be specified to limit the search. The "usual action" will be 726 * taken, depending on the ctlinput cmd. The caller must filter any 727 * cmds that are uninteresting (e.g., no error in the map). 728 * Call the protocol specific routine (if any) to report 729 * any errors for each matching socket. 730 * 731 * Must be called at splsoftnet. 732 */ 733 int 734 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 735 struct in6pcb *head; 736 struct sockaddr *dst; 737 u_int fport_arg, lport_arg; 738 struct in6_addr *laddr6; 739 int cmd; 740 void (*notify) __P((struct in6pcb *, int)); 741 { 742 struct in6pcb *in6p, *oin6p; 743 struct in6_addr faddr6; 744 u_short fport = fport_arg, lport = lport_arg; 745 int errno; 746 int nmatch = 0; 747 748 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 749 return 0; 750 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 751 if (IN6_IS_ADDR_ANY(&faddr6)) 752 return 0; 753 754 /* 755 * Redirects go to all references to the destination, 756 * and use in_rtchange to invalidate the route cache. 757 * Dead host indications: notify all references to the destination. 758 * Otherwise, if we have knowledge of the local port and address, 759 * deliver only to that socket. 760 */ 761 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 762 fport = 0; 763 lport = 0; 764 bzero((caddr_t)laddr6, sizeof(*laddr6)); 765 if (cmd != PRC_HOSTDEAD) 766 notify = in6_rtchange; 767 } 768 if (notify == NULL) 769 return 0; 770 errno = inet6ctlerrmap[cmd]; 771 for (in6p = head->in6p_next; in6p != head;) { 772 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 773 in6p->in6p_socket == 0 || 774 (lport && in6p->in6p_lport != lport) || 775 (!IN6_IS_ADDR_ANY(laddr6) && 776 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 777 (fport && in6p->in6p_fport != fport)) { 778 in6p = in6p->in6p_next; 779 continue; 780 } 781 oin6p = in6p; 782 in6p = in6p->in6p_next; 783 (*notify)(oin6p, errno); 784 nmatch++; 785 } 786 return nmatch; 787 } 788 789 /* 790 * Check for alternatives when higher level complains 791 * about service problems. For now, invalidate cached 792 * routing information. If the route was created dynamically 793 * (by a redirect), time to try a default gateway again. 794 */ 795 void 796 in6_losing(in6p) 797 struct in6pcb *in6p; 798 { 799 struct rtentry *rt; 800 struct rt_addrinfo info; 801 802 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 803 in6p->in6p_route.ro_rt = 0; 804 bzero((caddr_t)&info, sizeof(info)); 805 info.rti_info[RTAX_DST] = 806 (struct sockaddr *)&in6p->in6p_route.ro_dst; 807 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 808 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 809 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 810 if (rt->rt_flags & RTF_DYNAMIC) 811 (void)rtrequest(RTM_DELETE, rt_key(rt), 812 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 813 (struct rtentry **)0); 814 else 815 /* 816 * A new route can be allocated 817 * the next time output is attempted. 818 */ 819 rtfree(rt); 820 } 821 } 822 823 /* 824 * After a routing change, flush old routing 825 * and allocate a (hopefully) better one. 826 */ 827 void 828 in6_rtchange(in6p, errno) 829 struct in6pcb *in6p; 830 int errno; 831 { 832 if (in6p->in6p_route.ro_rt) { 833 rtfree(in6p->in6p_route.ro_rt); 834 in6p->in6p_route.ro_rt = 0; 835 /* 836 * A new route can be allocated the next time 837 * output is attempted. 838 */ 839 } 840 } 841 842 struct in6pcb * 843 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 844 struct in6pcb *head; 845 struct in6_addr *faddr6, *laddr6; 846 u_int fport_arg, lport_arg; 847 int flags; 848 { 849 struct in6pcb *in6p, *match = 0; 850 int matchwild = 3, wildcard; 851 u_short fport = fport_arg, lport = lport_arg; 852 853 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 854 if (in6p->in6p_lport != lport) 855 continue; 856 wildcard = 0; 857 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 858 if (IN6_IS_ADDR_ANY(laddr6)) 859 wildcard++; 860 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 861 continue; 862 } else { 863 if (!IN6_IS_ADDR_ANY(laddr6)) 864 wildcard++; 865 } 866 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 867 if (IN6_IS_ADDR_ANY(faddr6)) 868 wildcard++; 869 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 870 || in6p->in6p_fport != fport) 871 continue; 872 } else { 873 if (!IN6_IS_ADDR_ANY(faddr6)) 874 wildcard++; 875 } 876 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 877 continue; 878 if (wildcard < matchwild) { 879 match = in6p; 880 matchwild = wildcard; 881 if (matchwild == 0) 882 break; 883 } 884 } 885 return(match); 886 } 887 888 #ifndef TCP6 889 struct rtentry * 890 in6_pcbrtentry(in6p) 891 struct in6pcb *in6p; 892 { 893 struct route_in6 *ro; 894 895 ro = &in6p->in6p_route; 896 897 if (ro->ro_rt == NULL) { 898 /* 899 * No route yet, so try to acquire one. 900 */ 901 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 902 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 903 ro->ro_dst.sin6_family = AF_INET6; 904 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 905 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 906 rtalloc((struct route *)ro); 907 } 908 } 909 return (ro->ro_rt); 910 } 911 912 struct in6pcb * 913 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 914 struct in6pcb *head; 915 struct in6_addr *faddr6, *laddr6; 916 u_int fport_arg, lport_arg; 917 int faith; 918 { 919 struct in6pcb *in6p; 920 u_short fport = fport_arg, lport = lport_arg; 921 922 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 923 #if defined(NFAITH) && NFAITH > 0 924 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 925 continue; 926 #endif 927 /* find exact match on both source and dest */ 928 if (in6p->in6p_fport != fport) 929 continue; 930 if (in6p->in6p_lport != lport) 931 continue; 932 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 933 continue; 934 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 935 continue; 936 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 937 continue; 938 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 939 continue; 940 return in6p; 941 } 942 return NULL; 943 } 944 945 struct in6pcb * 946 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 947 struct in6pcb *head; 948 struct in6_addr *laddr6; 949 u_int lport_arg; 950 int faith; 951 { 952 struct in6pcb *in6p, *match; 953 u_short lport = lport_arg; 954 955 match = NULL; 956 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 957 /* 958 * find destination match. exact match is preferred 959 * against wildcard match. 960 */ 961 #if defined(NFAITH) && NFAITH > 0 962 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 963 continue; 964 #endif 965 if (in6p->in6p_fport != 0) 966 continue; 967 if (in6p->in6p_lport != lport) 968 continue; 969 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 970 match = in6p; 971 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 972 return in6p; 973 } 974 return match; 975 } 976 #endif 977
Indexes created Wed Oct 15 16:09:53 GMT 2025