in6_pcb.c revision 1.2.2.2
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 for (;;) { 264 lport = htons(head->in6p_lport); 265 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 266 #if 0 267 t = in_pcblookup_bind(&tcbtable, 268 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 269 lport); 270 #else 271 t = NULL; 272 #endif 273 } else { 274 t = in6_pcblookup(head, &zeroin6_addr, 0, 275 &in6p->in6p_laddr, lport, wild); 276 } 277 if (t == 0) 278 break; 279 if (head->in6p_lport >= IPV6PORT_ANONMAX) 280 head->in6p_lport = IPV6PORT_ANONMIN; 281 else 282 head->in6p_lport++; 283 if (head->in6p_lport == last_port) 284 return (EADDRINUSE); 285 } 286 } 287 in6p->in6p_lport = lport; 288 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 289 return(0); 290 } 291 292 /* 293 * Connect from a socket to a specified address. 294 * Both address and port must be specified in argument sin6. 295 * If don't have a local address for this socket yet, 296 * then pick one. 297 */ 298 int 299 in6_pcbconnect(in6p, nam) 300 struct in6pcb *in6p; 301 struct mbuf *nam; 302 { 303 struct in6_addr *in6a = NULL; 304 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 305 struct in6_pktinfo *pi; 306 struct ifnet *ifp = NULL; /* outgoing interface */ 307 int error = 0; 308 struct in6_addr mapped; 309 310 (void)&in6a; /* XXX fool gcc */ 311 312 if (nam->m_len != sizeof(*sin6)) 313 return(EINVAL); 314 if (sin6->sin6_family != AF_INET6) 315 return(EAFNOSUPPORT); 316 if (sin6->sin6_port == 0) 317 return(EADDRNOTAVAIL); 318 319 /* sanity check for mapped address case */ 320 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 321 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 322 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 323 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 324 return EINVAL; 325 } else { 326 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 327 return EINVAL; 328 } 329 330 /* 331 * If the scope of the destination is link-local, embed the interface 332 * index in the address. 333 */ 334 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 335 /* XXX boundary check is assumed to be already done. */ 336 /* XXX sin6_scope_id is weaker than advanced-api. */ 337 if (in6p->in6p_outputopts && 338 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 339 pi->ipi6_ifindex) { 340 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 341 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 342 } 343 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 344 in6p->in6p_moptions && 345 in6p->in6p_moptions->im6o_multicast_ifp) { 346 sin6->sin6_addr.s6_addr16[1] = 347 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 348 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 349 } else if (sin6->sin6_scope_id) { 350 /* boundary check */ 351 if (sin6->sin6_scope_id < 0 352 || if_index < sin6->sin6_scope_id) { 353 return ENXIO; /* XXX EINVAL? */ 354 } 355 sin6->sin6_addr.s6_addr16[1] 356 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 357 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 358 } 359 } 360 361 /* Source address selection. */ 362 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 363 && in6p->in6p_laddr.s6_addr32[3] == 0) { 364 struct sockaddr_in sin, *sinp; 365 366 bzero(&sin, sizeof(sin)); 367 sin.sin_len = sizeof(sin); 368 sin.sin_family = AF_INET; 369 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 370 sizeof(sin.sin_addr)); 371 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 372 in6p->in6p_socket->so_options, NULL, &error); 373 if (sinp == 0) { 374 if (error == 0) 375 error = EADDRNOTAVAIL; 376 return(error); 377 } 378 bzero(&mapped, sizeof(mapped)); 379 mapped.s6_addr16[5] = htons(0xffff); 380 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 381 in6a = &mapped; 382 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 383 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 384 in6p->in6p_moptions, &in6p->in6p_route, 385 &error); 386 if (in6a == 0) { 387 if (error == 0) 388 error = EADDRNOTAVAIL; 389 return(error); 390 } 391 } 392 if (in6p->in6p_route.ro_rt) 393 ifp = in6p->in6p_route.ro_rt->rt_ifp; 394 395 /* 396 * Default hop limit selection. If a hoplimit was specified via ioctl, 397 * use it. Else if the outgoing interface is detected and the current 398 * hop limit of the interface was specified by router advertisement, 399 * use the value. 400 * Otherwise, use the system default hoplimit. 401 */ 402 if (in6p->in6p_hops >= 0) 403 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 404 else if (ifp) 405 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 406 else 407 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 408 409 if (in6_pcblookup(in6p->in6p_head, 410 &sin6->sin6_addr, 411 sin6->sin6_port, 412 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 413 in6a : &in6p->in6p_laddr, 414 in6p->in6p_lport, 415 0)) 416 return(EADDRINUSE); 417 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 418 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 419 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 420 if (in6p->in6p_lport == 0) 421 (void)in6_pcbbind(in6p, (struct mbuf *)0); 422 in6p->in6p_laddr = *in6a; 423 } 424 in6p->in6p_faddr = sin6->sin6_addr; 425 in6p->in6p_fport = sin6->sin6_port; 426 /* 427 * xxx kazu flowlabel is necessary for connect? 428 * but if this line is missing, the garbage value remains. 429 */ 430 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 431 return(0); 432 } 433 434 /* 435 * Return an IPv6 address, which is the most appropriate for given 436 * destination and user specified options. 437 * If necessary, this function lookups the routing table and return 438 * an entry to the caller for later use. 439 */ 440 struct in6_addr * 441 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 442 struct sockaddr_in6 *dstsock; 443 struct ip6_pktopts *opts; 444 struct ip6_moptions *mopts; 445 struct route_in6 *ro; 446 int *errorp; 447 { 448 struct in6_addr *dst; 449 struct in6_ifaddr *ia6 = 0; 450 struct in6_pktinfo *pi; 451 452 dst = &dstsock->sin6_addr; 453 *errorp = 0; 454 455 /* 456 * If the source address is explicitly specified by the caller, 457 * use it. 458 * If the caller doesn't specify the source address but 459 * the outgoing interface, use an address associated with 460 * the interface. 461 */ 462 if (opts && (pi = opts->ip6po_pktinfo)) { 463 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 464 return(&pi->ipi6_addr); 465 else if (pi->ipi6_ifindex) { 466 /* XXX boundary check is assumed to be already done. */ 467 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 468 dst); 469 if (ia6 == 0) { 470 *errorp = EADDRNOTAVAIL; 471 return(0); 472 } 473 return(&satosin6(&ia6->ia_addr)->sin6_addr); 474 } 475 } 476 477 /* 478 * If the destination address is a multicast address and 479 * the outgoing interface for the address is specified 480 * by the caller, use an address associated with the interface. 481 * There is a sanity check here; if the destination has node-local 482 * scope, the outgoing interfacde should be a loopback address. 483 * Even if the outgoing interface is not specified, we also 484 * choose a loopback interface as the outgoing interface. 485 */ 486 if (IN6_IS_ADDR_MULTICAST(dst)) { 487 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 488 #ifdef __bsdi__ 489 extern struct ifnet loif; 490 #endif 491 492 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 493 #ifdef __bsdi__ 494 ifp = &loif; 495 #else 496 ifp = &loif[0]; 497 #endif 498 } 499 500 if (ifp) { 501 ia6 = in6_ifawithscope(ifp, dst); 502 if (ia6 == 0) { 503 *errorp = EADDRNOTAVAIL; 504 return(0); 505 } 506 return(&satosin6(&ia6->ia_addr)->sin6_addr); 507 } 508 } 509 510 /* 511 * XXX How should we use sin6_scope_id??? 512 */ 513 514 /* 515 * If the next hop address for the packet is specified 516 * by caller, use an address associated with the route 517 * to the next hop. 518 */ 519 { 520 struct sockaddr_in6 *sin6_next; 521 struct rtentry *rt; 522 523 if (opts && opts->ip6po_nexthop) { 524 sin6_next = satosin6(opts->ip6po_nexthop); 525 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 526 if (rt) { 527 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 528 if (ia6 == 0) 529 ia6 = ifatoia6(rt->rt_ifa); 530 } 531 if (ia6 == 0) { 532 *errorp = EADDRNOTAVAIL; 533 return(0); 534 } 535 return(&satosin6(&ia6->ia_addr)->sin6_addr); 536 } 537 } 538 539 /* 540 * If route is known or can be allocated now, 541 * our src addr is taken from the i/f, else punt. 542 */ 543 if (ro) { 544 if (ro->ro_rt && 545 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 546 RTFREE(ro->ro_rt); 547 ro->ro_rt = (struct rtentry *)0; 548 } 549 if (ro->ro_rt == (struct rtentry *)0 || 550 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 551 /* No route yet, so try to acquire one */ 552 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 553 ro->ro_dst.sin6_family = AF_INET6; 554 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 555 ro->ro_dst.sin6_addr = *dst; 556 if (IN6_IS_ADDR_MULTICAST(dst)) { 557 #ifdef __FreeBSD__ 558 ro->ro_rt = rtalloc1(&((struct route *)ro) 559 ->ro_dst, 0, 0UL); 560 #endif /*__FreeBSD__*/ 561 #if defined(__bsdi__) || defined(__NetBSD__) 562 ro->ro_rt = rtalloc1(&((struct route *)ro) 563 ->ro_dst, 0); 564 #endif /*__bsdi__*/ 565 } else { 566 #if 0 /* XXX Is this correct? */ 567 rtcalloc((struct route *)ro); 568 #else 569 rtalloc((struct route *)ro); 570 #endif 571 } 572 } 573 574 /* 575 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 576 * the address. But we don't know why it does so. 577 * It is necessary to ensure the scope even for lo0 578 * so doesn't check out IFF_LOOPBACK. 579 */ 580 581 if (ro->ro_rt) { 582 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 583 if (ia6 == 0) /* xxx scope error ?*/ 584 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 585 } 586 #if 0 587 /* 588 * xxx The followings are necessary? (kazu) 589 * I don't think so. 590 * It's for SO_DONTROUTE option in IPv4.(jinmei) 591 */ 592 if (ia6 == 0) { 593 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 594 595 sin6->sin6_addr = *dst; 596 597 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 598 if (ia6 == 0) 599 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 600 if (ia6 == 0) 601 return(0); 602 return(&satosin6(&ia6->ia_addr)->sin6_addr); 603 } 604 #endif /* 0 */ 605 if (ia6 == 0) { 606 *errorp = EHOSTUNREACH; /* no route */ 607 return(0); 608 } 609 return(&satosin6(&ia6->ia_addr)->sin6_addr); 610 } 611 612 *errorp = EADDRNOTAVAIL; 613 return(0); 614 } 615 616 void 617 in6_pcbdisconnect(in6p) 618 struct in6pcb *in6p; 619 { 620 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 621 in6p->in6p_fport = 0; 622 if (in6p->in6p_socket->so_state & SS_NOFDREF) 623 in6_pcbdetach(in6p); 624 } 625 626 void 627 in6_pcbdetach(in6p) 628 struct in6pcb *in6p; 629 { 630 struct socket *so = in6p->in6p_socket; 631 632 #ifdef IPSEC 633 if (sotoin6pcb(so) != 0) 634 key_freeso(so); 635 ipsec6_delete_pcbpolicy(in6p); 636 #endif /* IPSEC */ 637 sotoin6pcb(so) = 0; 638 sofree(so); 639 if (in6p->in6p_options) 640 m_freem(in6p->in6p_options); 641 if (in6p->in6p_outputopts) { 642 if (in6p->in6p_outputopts->ip6po_rthdr && 643 in6p->in6p_outputopts->ip6po_route.ro_rt) 644 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 645 if (in6p->in6p_outputopts->ip6po_m) 646 (void)m_free(in6p->in6p_outputopts->ip6po_m); 647 free(in6p->in6p_outputopts, M_IP6OPT); 648 } 649 if (in6p->in6p_route.ro_rt) 650 rtfree(in6p->in6p_route.ro_rt); 651 ip6_freemoptions(in6p->in6p_moptions); 652 remque(in6p); 653 FREE(in6p, M_PCB); 654 } 655 656 void 657 in6_setsockaddr(in6p, nam) 658 struct in6pcb *in6p; 659 struct mbuf *nam; 660 { 661 struct sockaddr_in6 *sin6; 662 663 nam->m_len = sizeof(*sin6); 664 sin6 = mtod(nam, struct sockaddr_in6 *); 665 bzero((caddr_t)sin6, sizeof(*sin6)); 666 sin6->sin6_family = AF_INET6; 667 sin6->sin6_len = sizeof(struct sockaddr_in6); 668 sin6->sin6_port = in6p->in6p_lport; 669 sin6->sin6_addr = in6p->in6p_laddr; 670 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 671 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 672 else 673 sin6->sin6_scope_id = 0; /*XXX*/ 674 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 675 sin6->sin6_addr.s6_addr16[1] = 0; 676 } 677 678 void 679 in6_setpeeraddr(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_fport; 691 sin6->sin6_addr = in6p->in6p_faddr; 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 /* 701 * Pass some notification to all connections of a protocol 702 * associated with address dst. The local address and/or port numbers 703 * may be specified to limit the search. The "usual action" will be 704 * taken, depending on the ctlinput cmd. The caller must filter any 705 * cmds that are uninteresting (e.g., no error in the map). 706 * Call the protocol specific routine (if any) to report 707 * any errors for each matching socket. 708 * 709 * Must be called at splnet. 710 */ 711 int 712 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 713 struct in6pcb *head; 714 struct sockaddr *dst; 715 u_int fport_arg, lport_arg; 716 struct in6_addr *laddr6; 717 int cmd; 718 void (*notify) __P((struct in6pcb *, int)); 719 { 720 struct in6pcb *in6p, *oin6p; 721 struct in6_addr faddr6; 722 u_short fport = fport_arg, lport = lport_arg; 723 int errno; 724 int nmatch = 0; 725 726 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 727 return 0; 728 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 729 if (IN6_IS_ADDR_ANY(&faddr6)) 730 return 0; 731 732 /* 733 * Redirects go to all references to the destination, 734 * and use in_rtchange to invalidate the route cache. 735 * Dead host indications: notify all references to the destination. 736 * Otherwise, if we have knowledge of the local port and address, 737 * deliver only to that socket. 738 */ 739 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 740 fport = 0; 741 lport = 0; 742 bzero((caddr_t)laddr6, sizeof(*laddr6)); 743 if (cmd != PRC_HOSTDEAD) 744 notify = in6_rtchange; 745 } 746 if (notify == NULL) 747 return 0; 748 errno = inet6ctlerrmap[cmd]; 749 for (in6p = head->in6p_next; in6p != head;) { 750 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 751 in6p->in6p_socket == 0 || 752 (lport && in6p->in6p_lport != lport) || 753 (!IN6_IS_ADDR_ANY(laddr6) && 754 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 755 (fport && in6p->in6p_fport != fport)) { 756 in6p = in6p->in6p_next; 757 continue; 758 } 759 oin6p = in6p; 760 in6p = in6p->in6p_next; 761 (*notify)(oin6p, errno); 762 nmatch++; 763 } 764 return nmatch; 765 } 766 767 /* 768 * Check for alternatives when higher level complains 769 * about service problems. For now, invalidate cached 770 * routing information. If the route was created dynamically 771 * (by a redirect), time to try a default gateway again. 772 */ 773 void 774 in6_losing(in6p) 775 struct in6pcb *in6p; 776 { 777 struct rtentry *rt; 778 struct rt_addrinfo info; 779 780 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 781 in6p->in6p_route.ro_rt = 0; 782 bzero((caddr_t)&info, sizeof(info)); 783 info.rti_info[RTAX_DST] = 784 (struct sockaddr *)&in6p->in6p_route.ro_dst; 785 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 786 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 787 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 788 if (rt->rt_flags & RTF_DYNAMIC) 789 (void)rtrequest(RTM_DELETE, rt_key(rt), 790 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 791 (struct rtentry **)0); 792 else 793 /* 794 * A new route can be allocated 795 * the next time output is attempted. 796 */ 797 rtfree(rt); 798 } 799 } 800 801 /* 802 * After a routing change, flush old routing 803 * and allocate a (hopefully) better one. 804 */ 805 void 806 in6_rtchange(in6p, errno) 807 struct in6pcb *in6p; 808 int errno; 809 { 810 if (in6p->in6p_route.ro_rt) { 811 rtfree(in6p->in6p_route.ro_rt); 812 in6p->in6p_route.ro_rt = 0; 813 /* 814 * A new route can be allocated the next time 815 * output is attempted. 816 */ 817 } 818 } 819 820 struct in6pcb * 821 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 822 struct in6pcb *head; 823 struct in6_addr *faddr6, *laddr6; 824 u_int fport_arg, lport_arg; 825 int flags; 826 { 827 struct in6pcb *in6p, *match = 0; 828 int matchwild = 3, wildcard; 829 u_short fport = fport_arg, lport = lport_arg; 830 831 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 832 if (in6p->in6p_lport != lport) 833 continue; 834 wildcard = 0; 835 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 836 if (IN6_IS_ADDR_ANY(laddr6)) 837 wildcard++; 838 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 839 continue; 840 } else { 841 if (!IN6_IS_ADDR_ANY(laddr6)) 842 wildcard++; 843 } 844 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 845 if (IN6_IS_ADDR_ANY(faddr6)) 846 wildcard++; 847 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 848 || in6p->in6p_fport != fport) 849 continue; 850 } else { 851 if (!IN6_IS_ADDR_ANY(faddr6)) 852 wildcard++; 853 } 854 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 855 continue; 856 if (wildcard < matchwild) { 857 match = in6p; 858 matchwild = wildcard; 859 if (matchwild == 0) 860 break; 861 } 862 } 863 return(match); 864 } 865 866 #ifndef TCP6 867 struct rtentry * 868 in6_pcbrtentry(in6p) 869 struct in6pcb *in6p; 870 { 871 struct route_in6 *ro; 872 873 ro = &in6p->in6p_route; 874 875 if (ro->ro_rt == NULL) { 876 /* 877 * No route yet, so try to acquire one. 878 */ 879 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 880 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 881 ro->ro_dst.sin6_family = AF_INET6; 882 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 883 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 884 rtalloc((struct route *)ro); 885 } 886 } 887 return (ro->ro_rt); 888 } 889 890 struct in6pcb * 891 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg) 892 struct in6pcb *head; 893 struct in6_addr *faddr6, *laddr6; 894 u_int fport_arg, lport_arg; 895 { 896 struct in6pcb *in6p; 897 u_short fport = fport_arg, lport = lport_arg; 898 899 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 900 /* find exact match on both source and dest */ 901 if (in6p->in6p_fport != fport) 902 continue; 903 if (in6p->in6p_lport != lport) 904 continue; 905 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 906 continue; 907 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 908 continue; 909 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 910 continue; 911 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 912 continue; 913 return in6p; 914 } 915 return NULL; 916 } 917 918 struct in6pcb * 919 in6_pcblookup_bind(head, laddr6, lport_arg) 920 struct in6pcb *head; 921 struct in6_addr *laddr6; 922 u_int lport_arg; 923 { 924 struct in6pcb *in6p, *match; 925 u_short lport = lport_arg; 926 927 match = NULL; 928 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 929 /* 930 * find destination match. exact match is preferred 931 * against wildcard match. 932 */ 933 if (in6p->in6p_fport != 0) 934 continue; 935 if (in6p->in6p_lport != lport) 936 continue; 937 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 938 match = in6p; 939 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 940 return in6p; 941 } 942 return match; 943 } 944 #endif 945
Indexes created Wed Oct 15 16:09:53 GMT 2025