in6_pcb.c revision 1.1.2.2
1 /* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * Copyright (c) 1982, 1986, 1991, 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Berkeley and its contributors. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 63 */ 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/malloc.h> 68 #include <sys/mbuf.h> 69 #include <sys/protosw.h> 70 #include <sys/socket.h> 71 #include <sys/socketvar.h> 72 #include <sys/ioctl.h> 73 #include <sys/errno.h> 74 #include <sys/time.h> 75 #include <sys/proc.h> 76 77 #include <net/if.h> 78 #include <net/route.h> 79 80 #include <netinet/in.h> 81 #include <netinet/in_var.h> 82 #include <netinet/in_systm.h> 83 #include <netinet/ip.h> 84 #include <netinet/in_pcb.h> 85 #include <netinet6/ip6.h> 86 #include <netinet6/in6_pcb.h> 87 #include <netinet6/ip6_var.h> 88 #include <netinet6/nd6.h> 89 90 #include "loop.h" 91 #ifdef __NetBSD__ 92 extern struct ifnet loif[NLOOP]; 93 #endif 94 95 #ifdef IPSEC 96 #include <netinet6/ipsec.h> 97 #include <netkey/key.h> 98 #include <netkey/key_debug.h> 99 #endif /* IPSEC */ 100 101 struct in6_addr zeroin6_addr; 102 103 int 104 in6_pcballoc(so, head) 105 struct socket *so; 106 struct in6pcb *head; 107 { 108 struct in6pcb *in6p; 109 110 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 111 if (in6p == NULL) 112 return(ENOBUFS); 113 bzero((caddr_t)in6p, sizeof(*in6p)); 114 in6p->in6p_head = head; 115 in6p->in6p_socket = so; 116 in6p->in6p_hops = -1; /* use kernel default */ 117 in6p->in6p_icmp6filt = NULL; 118 insque(in6p, head); 119 so->so_pcb = (caddr_t)in6p; 120 return(0); 121 } 122 123 int 124 in6_pcbbind(in6p, nam) 125 register struct in6pcb *in6p; 126 struct mbuf *nam; 127 { 128 struct socket *so = in6p->in6p_socket; 129 struct in6pcb *head = in6p->in6p_head; 130 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 131 struct proc *p = curproc; /* XXX */ 132 u_short lport = 0; 133 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 134 int error; 135 136 if (in6p->in6p_lport || !IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) 137 return(EINVAL); 138 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 139 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 140 (so->so_options & SO_ACCEPTCONN) == 0)) 141 wild = IN6PLOOKUP_WILDCARD; 142 if (nam) { 143 sin6 = mtod(nam, struct sockaddr_in6 *); 144 if (nam->m_len != sizeof(*sin6)) 145 return(EINVAL); 146 /* 147 * We should check the family, but old programs 148 * incorrectly fail to intialize it. 149 */ 150 if (sin6->sin6_family != AF_INET6) 151 return(EAFNOSUPPORT); 152 153 /* 154 * If the scope of the destination is link-local, embed the 155 * interface index in the address. 156 */ 157 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 158 /* XXX boundary check is assumed to be already done. */ 159 /* XXX sin6_scope_id is weaker than advanced-api. */ 160 struct in6_pktinfo *pi; 161 if (in6p->in6p_outputopts && 162 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 163 pi->ipi6_ifindex) { 164 sin6->sin6_addr.s6_addr16[1] 165 = htons(pi->ipi6_ifindex); 166 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 167 && in6p->in6p_moptions 168 && in6p->in6p_moptions->im6o_multicast_ifp) { 169 sin6->sin6_addr.s6_addr16[1] = 170 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 171 } else if (sin6->sin6_scope_id) { 172 /* boundary check */ 173 if (sin6->sin6_scope_id < 0 174 || if_index < sin6->sin6_scope_id) { 175 return ENXIO; /* XXX EINVAL? */ 176 } 177 sin6->sin6_addr.s6_addr16[1] 178 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 179 /* this must be cleared for ifa_ifwithaddr() */ 180 sin6->sin6_scope_id = 0; 181 } 182 } 183 184 lport = sin6->sin6_port; 185 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 186 /* 187 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 188 * allow compepte duplication of binding if 189 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 190 * and a multicast address is bound on both 191 * new and duplicated sockets. 192 */ 193 if (so->so_options & SO_REUSEADDR) 194 reuseport = SO_REUSEADDR|SO_REUSEPORT; 195 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 196 struct sockaddr_in sin; 197 198 bzero(&sin, sizeof(sin)); 199 sin.sin_len = sizeof(sin); 200 sin.sin_family = AF_INET; 201 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 202 sizeof(sin.sin_addr)); 203 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 204 return EADDRNOTAVAIL; 205 } else if (!IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 206 struct ifaddr *ia = NULL; 207 208 sin6->sin6_port = 0; /* yech... */ 209 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 210 return(EADDRNOTAVAIL); 211 212 /* 213 * XXX: bind to an anycast address might accidentally 214 * cause sending a packet with anycast source address. 215 */ 216 if (ia && 217 ((struct in6_ifaddr *)ia)->ia6_flags & 218 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 219 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 220 return(EADDRNOTAVAIL); 221 } 222 } 223 if (lport) { 224 /* GROSS */ 225 if (ntohs(lport) < IPV6PORT_RESERVED && 226 (error = suser(p->p_ucred, &p->p_acflag))) 227 return(EACCES); 228 229 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 230 /* should check this but we can't ... */ 231 #if 0 232 struct inpcb *t; 233 234 t = in_pcblookup_bind(&tcbtable, 235 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 236 lport); 237 if (t && (reuseport & t->inp_socket->so_options) == 0) 238 return EADDRINUSE; 239 #endif 240 } else { 241 struct in6pcb *t; 242 243 t = in6_pcblookup(head, &zeroin6_addr, 0, 244 &sin6->sin6_addr, lport, wild); 245 if (t && (reuseport & t->in6p_socket->so_options) == 0) 246 return(EADDRINUSE); 247 } 248 } 249 in6p->in6p_laddr = sin6->sin6_addr; 250 } 251 if (lport == 0) { 252 u_short last_port; 253 void *t; 254 255 /* XXX IN6P_LOWPORT */ 256 257 /* value out of range */ 258 if (head->in6p_lport < IPV6PORT_ANONMIN) 259 head->in6p_lport = IPV6PORT_ANONMIN; 260 else if (head->in6p_lport > IPV6PORT_ANONMAX) 261 head->in6p_lport = IPV6PORT_ANONMIN; 262 last_port = head->in6p_lport; 263 goto startover; 264 for (;;) { 265 lport = htons(head->in6p_lport); 266 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 267 #if 0 268 t = in_pcblookup_bind(&tcbtable, 269 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 270 lport); 271 #else 272 t = NULL; 273 #endif 274 } else { 275 t = in6_pcblookup(head, &zeroin6_addr, 0, 276 &in6p->in6p_laddr, lport, wild); 277 } 278 if (t == 0) 279 break; 280 startover: 281 if (head->in6p_lport >= IPV6PORT_ANONMAX) 282 head->in6p_lport = IPV6PORT_ANONMIN; 283 else 284 head->in6p_lport++; 285 if (head->in6p_lport == last_port) 286 return (EADDRINUSE); 287 } 288 } 289 in6p->in6p_lport = lport; 290 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 291 return(0); 292 } 293 294 /* 295 * Connect from a socket to a specified address. 296 * Both address and port must be specified in argument sin6. 297 * If don't have a local address for this socket yet, 298 * then pick one. 299 */ 300 int 301 in6_pcbconnect(in6p, nam) 302 struct in6pcb *in6p; 303 struct mbuf *nam; 304 { 305 struct in6_addr *in6a = NULL; 306 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 307 struct in6_pktinfo *pi; 308 struct ifnet *ifp = NULL; /* outgoing interface */ 309 int error = 0; 310 struct in6_addr mapped; 311 312 (void)&in6a; /* XXX fool gcc */ 313 314 if (nam->m_len != sizeof(*sin6)) 315 return(EINVAL); 316 if (sin6->sin6_family != AF_INET6) 317 return(EAFNOSUPPORT); 318 if (sin6->sin6_port == 0) 319 return(EADDRNOTAVAIL); 320 321 /* sanity check for mapped address case */ 322 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 323 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 324 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 325 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 326 return EINVAL; 327 } else { 328 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 329 return EINVAL; 330 } 331 332 /* 333 * If the scope of the destination is link-local, embed the interface 334 * index in the address. 335 */ 336 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 337 /* XXX boundary check is assumed to be already done. */ 338 /* XXX sin6_scope_id is weaker than advanced-api. */ 339 if (in6p->in6p_outputopts && 340 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 341 pi->ipi6_ifindex) { 342 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 343 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 344 } 345 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 346 in6p->in6p_moptions && 347 in6p->in6p_moptions->im6o_multicast_ifp) { 348 sin6->sin6_addr.s6_addr16[1] = 349 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 350 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 351 } else if (sin6->sin6_scope_id) { 352 /* boundary check */ 353 if (sin6->sin6_scope_id < 0 354 || if_index < sin6->sin6_scope_id) { 355 return ENXIO; /* XXX EINVAL? */ 356 } 357 sin6->sin6_addr.s6_addr16[1] 358 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 359 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 360 } 361 } 362 363 /* Source address selection. */ 364 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 365 && in6p->in6p_laddr.s6_addr32[3] == 0) { 366 struct sockaddr_in sin, *sinp; 367 368 bzero(&sin, sizeof(sin)); 369 sin.sin_len = sizeof(sin); 370 sin.sin_family = AF_INET; 371 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 372 sizeof(sin.sin_addr)); 373 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 374 in6p->in6p_socket->so_options, NULL, &error); 375 if (sinp == 0) { 376 if (error == 0) 377 error = EADDRNOTAVAIL; 378 return(error); 379 } 380 bzero(&mapped, sizeof(mapped)); 381 mapped.s6_addr16[5] = htons(0xffff); 382 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 383 in6a = &mapped; 384 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 385 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 386 in6p->in6p_moptions, &in6p->in6p_route, 387 &error); 388 if (in6a == 0) { 389 if (error == 0) 390 error = EADDRNOTAVAIL; 391 return(error); 392 } 393 } 394 if (in6p->in6p_route.ro_rt) 395 ifp = in6p->in6p_route.ro_rt->rt_ifp; 396 397 /* 398 * Default hop limit selection. If a hoplimit was specified via ioctl, 399 * use it. Else if the outgoing interface is detected and the current 400 * hop limit of the interface was specified by router advertisement, 401 * use the value. 402 * Otherwise, use the system default hoplimit. 403 */ 404 if (in6p->in6p_hops >= 0) 405 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 406 else if (ifp) 407 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 408 else 409 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 410 411 if (in6_pcblookup(in6p->in6p_head, 412 &sin6->sin6_addr, 413 sin6->sin6_port, 414 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 415 in6a : &in6p->in6p_laddr, 416 in6p->in6p_lport, 417 0)) 418 return(EADDRINUSE); 419 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 420 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 421 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 422 if (in6p->in6p_lport == 0) 423 (void)in6_pcbbind(in6p, (struct mbuf *)0); 424 in6p->in6p_laddr = *in6a; 425 } 426 in6p->in6p_faddr = sin6->sin6_addr; 427 in6p->in6p_fport = sin6->sin6_port; 428 /* 429 * xxx kazu flowlabel is necessary for connect? 430 * but if this line is missing, the garbage value remains. 431 */ 432 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 433 return(0); 434 } 435 436 /* 437 * Return an IPv6 address, which is the most appropriate for given 438 * destination and user specified options. 439 * If necessary, this function lookups the routing table and return 440 * an entry to the caller for later use. 441 */ 442 struct in6_addr * 443 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 444 struct sockaddr_in6 *dstsock; 445 struct ip6_pktopts *opts; 446 struct ip6_moptions *mopts; 447 struct route_in6 *ro; 448 int *errorp; 449 { 450 struct in6_addr *dst; 451 struct in6_ifaddr *ia6 = 0; 452 struct in6_pktinfo *pi; 453 454 dst = &dstsock->sin6_addr; 455 *errorp = 0; 456 457 /* 458 * If the source address is explicitly specified by the caller, 459 * use it. 460 * If the caller doesn't specify the source address but 461 * the outgoing interface, use an address associated with 462 * the interface. 463 */ 464 if (opts && (pi = opts->ip6po_pktinfo)) { 465 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 466 return(&pi->ipi6_addr); 467 else if (pi->ipi6_ifindex) { 468 /* XXX boundary check is assumed to be already done. */ 469 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 470 dst); 471 if (ia6 == 0) { 472 *errorp = EADDRNOTAVAIL; 473 return(0); 474 } 475 return(&satosin6(&ia6->ia_addr)->sin6_addr); 476 } 477 } 478 479 /* 480 * If the destination address is a multicast address and 481 * the outgoing interface for the address is specified 482 * by the caller, use an address associated with the interface. 483 * There is a sanity check here; if the destination has node-local 484 * scope, the outgoing interfacde should be a loopback address. 485 * Even if the outgoing interface is not specified, we also 486 * choose a loopback interface as the outgoing interface. 487 */ 488 if (IN6_IS_ADDR_MULTICAST(dst)) { 489 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 490 #ifdef __bsdi__ 491 extern struct ifnet loif; 492 #endif 493 494 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 495 #ifdef __bsdi__ 496 ifp = &loif; 497 #else 498 ifp = &loif[0]; 499 #endif 500 } 501 502 if (ifp) { 503 ia6 = in6_ifawithscope(ifp, dst); 504 if (ia6 == 0) { 505 *errorp = EADDRNOTAVAIL; 506 return(0); 507 } 508 return(&satosin6(&ia6->ia_addr)->sin6_addr); 509 } 510 } 511 512 /* 513 * XXX How should we use sin6_scope_id??? 514 */ 515 516 /* 517 * If the next hop address for the packet is specified 518 * by caller, use an address associated with the route 519 * to the next hop. 520 */ 521 { 522 struct sockaddr_in6 *sin6_next; 523 struct rtentry *rt; 524 525 if (opts && opts->ip6po_nexthop) { 526 sin6_next = satosin6(opts->ip6po_nexthop); 527 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 528 if (rt) { 529 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 530 if (ia6 == 0) 531 ia6 = ifatoia6(rt->rt_ifa); 532 } 533 if (ia6 == 0) { 534 *errorp = EADDRNOTAVAIL; 535 return(0); 536 } 537 return(&satosin6(&ia6->ia_addr)->sin6_addr); 538 } 539 } 540 541 /* 542 * If route is known or can be allocated now, 543 * our src addr is taken from the i/f, else punt. 544 */ 545 if (ro) { 546 if (ro->ro_rt && 547 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 548 RTFREE(ro->ro_rt); 549 ro->ro_rt = (struct rtentry *)0; 550 } 551 if (ro->ro_rt == (struct rtentry *)0 || 552 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 553 /* No route yet, so try to acquire one */ 554 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 555 ro->ro_dst.sin6_family = AF_INET6; 556 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 557 ro->ro_dst.sin6_addr = *dst; 558 if (IN6_IS_ADDR_MULTICAST(dst)) { 559 #ifdef __FreeBSD__ 560 ro->ro_rt = rtalloc1(&((struct route *)ro) 561 ->ro_dst, 0, 0UL); 562 #endif /*__FreeBSD__*/ 563 #if defined(__bsdi__) || defined(__NetBSD__) 564 ro->ro_rt = rtalloc1(&((struct route *)ro) 565 ->ro_dst, 0); 566 #endif /*__bsdi__*/ 567 } else { 568 #if 0 /* XXX Is this correct? */ 569 rtcalloc((struct route *)ro); 570 #else 571 rtalloc((struct route *)ro); 572 #endif 573 } 574 } 575 576 /* 577 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 578 * the address. But we don't know why it does so. 579 * It is necessary to ensure the scope even for lo0 580 * so doesn't check out IFF_LOOPBACK. 581 */ 582 583 if (ro->ro_rt) { 584 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 585 if (ia6 == 0) /* xxx scope error ?*/ 586 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 587 } 588 #if 0 589 /* 590 * xxx The followings are necessary? (kazu) 591 * I don't think so. 592 * It's for SO_DONTROUTE option in IPv4.(jinmei) 593 */ 594 if (ia6 == 0) { 595 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 596 597 sin6->sin6_addr = *dst; 598 599 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 600 if (ia6 == 0) 601 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 602 if (ia6 == 0) 603 return(0); 604 return(&satosin6(&ia6->ia_addr)->sin6_addr); 605 } 606 #endif /* 0 */ 607 if (ia6 == 0) { 608 *errorp = EHOSTUNREACH; /* no route */ 609 return(0); 610 } 611 return(&satosin6(&ia6->ia_addr)->sin6_addr); 612 } 613 614 *errorp = EADDRNOTAVAIL; 615 return(0); 616 } 617 618 void 619 in6_pcbdisconnect(in6p) 620 struct in6pcb *in6p; 621 { 622 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 623 in6p->in6p_fport = 0; 624 if (in6p->in6p_socket->so_state & SS_NOFDREF) 625 in6_pcbdetach(in6p); 626 } 627 628 void 629 in6_pcbdetach(in6p) 630 struct in6pcb *in6p; 631 { 632 struct socket *so = in6p->in6p_socket; 633 634 #ifdef IPSEC 635 if (sotoin6pcb(so) != 0) 636 key_freeso(so); 637 ipsec6_delete_pcbpolicy(in6p); 638 #endif /* IPSEC */ 639 sotoin6pcb(so) = 0; 640 sofree(so); 641 if (in6p->in6p_options) 642 m_freem(in6p->in6p_options); 643 if (in6p->in6p_outputopts) { 644 if (in6p->in6p_outputopts->ip6po_rthdr && 645 in6p->in6p_outputopts->ip6po_route.ro_rt) 646 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 647 if (in6p->in6p_outputopts->ip6po_m) 648 (void)m_free(in6p->in6p_outputopts->ip6po_m); 649 free(in6p->in6p_outputopts, M_IP6OPT); 650 } 651 if (in6p->in6p_route.ro_rt) 652 rtfree(in6p->in6p_route.ro_rt); 653 ip6_freemoptions(in6p->in6p_moptions); 654 remque(in6p); 655 FREE(in6p, M_PCB); 656 } 657 658 void 659 in6_setsockaddr(in6p, nam) 660 struct in6pcb *in6p; 661 struct mbuf *nam; 662 { 663 struct sockaddr_in6 *sin6; 664 665 nam->m_len = sizeof(*sin6); 666 sin6 = mtod(nam, struct sockaddr_in6 *); 667 bzero((caddr_t)sin6, sizeof(*sin6)); 668 sin6->sin6_family = AF_INET6; 669 sin6->sin6_len = sizeof(struct sockaddr_in6); 670 sin6->sin6_port = in6p->in6p_lport; 671 sin6->sin6_addr = in6p->in6p_laddr; 672 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 673 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 674 else 675 sin6->sin6_scope_id = 0; /*XXX*/ 676 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 677 sin6->sin6_addr.s6_addr16[1] = 0; 678 } 679 680 void 681 in6_setpeeraddr(in6p, nam) 682 struct in6pcb *in6p; 683 struct mbuf *nam; 684 { 685 struct sockaddr_in6 *sin6; 686 687 nam->m_len = sizeof(*sin6); 688 sin6 = mtod(nam, struct sockaddr_in6 *); 689 bzero((caddr_t)sin6, sizeof(*sin6)); 690 sin6->sin6_family = AF_INET6; 691 sin6->sin6_len = sizeof(struct sockaddr_in6); 692 sin6->sin6_port = in6p->in6p_fport; 693 sin6->sin6_addr = in6p->in6p_faddr; 694 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 695 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 696 else 697 sin6->sin6_scope_id = 0; /*XXX*/ 698 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 699 sin6->sin6_addr.s6_addr16[1] = 0; 700 } 701 702 /* 703 * Pass some notification to all connections of a protocol 704 * associated with address dst. The local address and/or port numbers 705 * may be specified to limit the search. The "usual action" will be 706 * taken, depending on the ctlinput cmd. The caller must filter any 707 * cmds that are uninteresting (e.g., no error in the map). 708 * Call the protocol specific routine (if any) to report 709 * any errors for each matching socket. 710 * 711 * Must be called at splsoftnet. 712 */ 713 int 714 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 715 struct in6pcb *head; 716 struct sockaddr *dst; 717 u_int fport_arg, lport_arg; 718 struct in6_addr *laddr6; 719 int cmd; 720 void (*notify) __P((struct in6pcb *, int)); 721 { 722 struct in6pcb *in6p, *oin6p; 723 struct in6_addr faddr6; 724 u_short fport = fport_arg, lport = lport_arg; 725 int errno; 726 int nmatch = 0; 727 728 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 729 return 0; 730 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 731 if (IN6_IS_ADDR_ANY(&faddr6)) 732 return 0; 733 734 /* 735 * Redirects go to all references to the destination, 736 * and use in_rtchange to invalidate the route cache. 737 * Dead host indications: notify all references to the destination. 738 * Otherwise, if we have knowledge of the local port and address, 739 * deliver only to that socket. 740 */ 741 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 742 fport = 0; 743 lport = 0; 744 bzero((caddr_t)laddr6, sizeof(*laddr6)); 745 if (cmd != PRC_HOSTDEAD) 746 notify = in6_rtchange; 747 } 748 if (notify == NULL) 749 return 0; 750 errno = inet6ctlerrmap[cmd]; 751 for (in6p = head->in6p_next; in6p != head;) { 752 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 753 in6p->in6p_socket == 0 || 754 (lport && in6p->in6p_lport != lport) || 755 (!IN6_IS_ADDR_ANY(laddr6) && 756 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 757 (fport && in6p->in6p_fport != fport)) { 758 in6p = in6p->in6p_next; 759 continue; 760 } 761 oin6p = in6p; 762 in6p = in6p->in6p_next; 763 (*notify)(oin6p, errno); 764 nmatch++; 765 } 766 return nmatch; 767 } 768 769 /* 770 * Check for alternatives when higher level complains 771 * about service problems. For now, invalidate cached 772 * routing information. If the route was created dynamically 773 * (by a redirect), time to try a default gateway again. 774 */ 775 void 776 in6_losing(in6p) 777 struct in6pcb *in6p; 778 { 779 struct rtentry *rt; 780 struct rt_addrinfo info; 781 782 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 783 in6p->in6p_route.ro_rt = 0; 784 bzero((caddr_t)&info, sizeof(info)); 785 info.rti_info[RTAX_DST] = 786 (struct sockaddr *)&in6p->in6p_route.ro_dst; 787 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 788 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 789 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 790 if (rt->rt_flags & RTF_DYNAMIC) 791 (void)rtrequest(RTM_DELETE, rt_key(rt), 792 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 793 (struct rtentry **)0); 794 else 795 /* 796 * A new route can be allocated 797 * the next time output is attempted. 798 */ 799 rtfree(rt); 800 } 801 } 802 803 /* 804 * After a routing change, flush old routing 805 * and allocate a (hopefully) better one. 806 */ 807 void 808 in6_rtchange(in6p, errno) 809 struct in6pcb *in6p; 810 int errno; 811 { 812 if (in6p->in6p_route.ro_rt) { 813 rtfree(in6p->in6p_route.ro_rt); 814 in6p->in6p_route.ro_rt = 0; 815 /* 816 * A new route can be allocated the next time 817 * output is attempted. 818 */ 819 } 820 } 821 822 struct in6pcb * 823 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 824 struct in6pcb *head; 825 struct in6_addr *faddr6, *laddr6; 826 u_int fport_arg, lport_arg; 827 int flags; 828 { 829 struct in6pcb *in6p, *match = 0; 830 int matchwild = 3, wildcard; 831 u_short fport = fport_arg, lport = lport_arg; 832 833 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 834 if (in6p->in6p_lport != lport) 835 continue; 836 wildcard = 0; 837 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 838 if (IN6_IS_ADDR_ANY(laddr6)) 839 wildcard++; 840 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 841 continue; 842 } else { 843 if (!IN6_IS_ADDR_ANY(laddr6)) 844 wildcard++; 845 } 846 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 847 if (IN6_IS_ADDR_ANY(faddr6)) 848 wildcard++; 849 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 850 || in6p->in6p_fport != fport) 851 continue; 852 } else { 853 if (!IN6_IS_ADDR_ANY(faddr6)) 854 wildcard++; 855 } 856 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 857 continue; 858 if (wildcard < matchwild) { 859 match = in6p; 860 matchwild = wildcard; 861 if (matchwild == 0) 862 break; 863 } 864 } 865 return(match); 866 } 867 868 #ifndef TCP6 869 struct rtentry * 870 in6_pcbrtentry(in6p) 871 struct in6pcb *in6p; 872 { 873 struct route_in6 *ro; 874 875 ro = &in6p->in6p_route; 876 877 if (ro->ro_rt == NULL) { 878 /* 879 * No route yet, so try to acquire one. 880 */ 881 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 882 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 883 ro->ro_dst.sin6_family = AF_INET6; 884 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 885 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 886 rtalloc((struct route *)ro); 887 } 888 } 889 return (ro->ro_rt); 890 } 891 892 struct in6pcb * 893 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg) 894 struct in6pcb *head; 895 struct in6_addr *faddr6, *laddr6; 896 u_int fport_arg, lport_arg; 897 { 898 struct in6pcb *in6p; 899 u_short fport = fport_arg, lport = lport_arg; 900 901 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 902 /* find exact match on both source and dest */ 903 if (in6p->in6p_fport != fport) 904 continue; 905 if (in6p->in6p_lport != lport) 906 continue; 907 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 908 continue; 909 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 910 continue; 911 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 912 continue; 913 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 914 continue; 915 return in6p; 916 } 917 return NULL; 918 } 919 920 struct in6pcb * 921 in6_pcblookup_bind(head, laddr6, lport_arg) 922 struct in6pcb *head; 923 struct in6_addr *laddr6; 924 u_int lport_arg; 925 { 926 struct in6pcb *in6p, *match; 927 u_short lport = lport_arg; 928 929 match = NULL; 930 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 931 /* 932 * find destination match. exact match is preferred 933 * against wildcard match. 934 */ 935 if (in6p->in6p_fport != 0) 936 continue; 937 if (in6p->in6p_lport != lport) 938 continue; 939 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 940 match = in6p; 941 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 942 return in6p; 943 } 944 return match; 945 } 946 #endif 947
Indexes created Sat Oct 18 08:10:09 GMT 2025