in6_pcb.c revision 1.4
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 #if 0 119 insque(in6p, head); 120 #else 121 in6p->in6p_next = head->in6p_next; 122 head->in6p_next = in6p; 123 in6p->in6p_prev = head; 124 in6p->in6p_next->in6p_prev = in6p; 125 #endif 126 so->so_pcb = (caddr_t)in6p; 127 return(0); 128 } 129 130 int 131 in6_pcbbind(in6p, nam) 132 register struct in6pcb *in6p; 133 struct mbuf *nam; 134 { 135 struct socket *so = in6p->in6p_socket; 136 struct in6pcb *head = in6p->in6p_head; 137 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 138 struct proc *p = curproc; /* XXX */ 139 u_short lport = 0; 140 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 141 int error; 142 143 if (in6p->in6p_lport || !IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) 144 return(EINVAL); 145 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 146 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 147 (so->so_options & SO_ACCEPTCONN) == 0)) 148 wild = IN6PLOOKUP_WILDCARD; 149 if (nam) { 150 sin6 = mtod(nam, struct sockaddr_in6 *); 151 if (nam->m_len != sizeof(*sin6)) 152 return(EINVAL); 153 /* 154 * We should check the family, but old programs 155 * incorrectly fail to intialize it. 156 */ 157 if (sin6->sin6_family != AF_INET6) 158 return(EAFNOSUPPORT); 159 160 /* 161 * If the scope of the destination is link-local, embed the 162 * interface index in the address. 163 */ 164 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 165 /* XXX boundary check is assumed to be already done. */ 166 /* XXX sin6_scope_id is weaker than advanced-api. */ 167 struct in6_pktinfo *pi; 168 if (in6p->in6p_outputopts && 169 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 170 pi->ipi6_ifindex) { 171 sin6->sin6_addr.s6_addr16[1] 172 = htons(pi->ipi6_ifindex); 173 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 174 && in6p->in6p_moptions 175 && in6p->in6p_moptions->im6o_multicast_ifp) { 176 sin6->sin6_addr.s6_addr16[1] = 177 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 178 } else if (sin6->sin6_scope_id) { 179 /* boundary check */ 180 if (sin6->sin6_scope_id < 0 181 || if_index < sin6->sin6_scope_id) { 182 return ENXIO; /* XXX EINVAL? */ 183 } 184 sin6->sin6_addr.s6_addr16[1] 185 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 186 /* this must be cleared for ifa_ifwithaddr() */ 187 sin6->sin6_scope_id = 0; 188 } 189 } 190 191 lport = sin6->sin6_port; 192 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 193 /* 194 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 195 * allow compepte duplication of binding if 196 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 197 * and a multicast address is bound on both 198 * new and duplicated sockets. 199 */ 200 if (so->so_options & SO_REUSEADDR) 201 reuseport = SO_REUSEADDR|SO_REUSEPORT; 202 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 203 struct sockaddr_in sin; 204 205 bzero(&sin, sizeof(sin)); 206 sin.sin_len = sizeof(sin); 207 sin.sin_family = AF_INET; 208 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 209 sizeof(sin.sin_addr)); 210 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 211 return EADDRNOTAVAIL; 212 } else if (!IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 213 struct ifaddr *ia = NULL; 214 215 sin6->sin6_port = 0; /* yech... */ 216 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 217 return(EADDRNOTAVAIL); 218 219 /* 220 * XXX: bind to an anycast address might accidentally 221 * cause sending a packet with anycast source address. 222 */ 223 if (ia && 224 ((struct in6_ifaddr *)ia)->ia6_flags & 225 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 226 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 227 return(EADDRNOTAVAIL); 228 } 229 } 230 if (lport) { 231 /* GROSS */ 232 if (ntohs(lport) < IPV6PORT_RESERVED && 233 (error = suser(p->p_ucred, &p->p_acflag))) 234 return(EACCES); 235 236 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 237 /* should check this but we can't ... */ 238 #if 0 239 struct inpcb *t; 240 241 t = in_pcblookup_bind(&tcbtable, 242 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 243 lport); 244 if (t && (reuseport & t->inp_socket->so_options) == 0) 245 return EADDRINUSE; 246 #endif 247 } else { 248 struct in6pcb *t; 249 250 t = in6_pcblookup(head, &zeroin6_addr, 0, 251 &sin6->sin6_addr, lport, wild); 252 if (t && (reuseport & t->in6p_socket->so_options) == 0) 253 return(EADDRINUSE); 254 } 255 } 256 in6p->in6p_laddr = sin6->sin6_addr; 257 } 258 if (lport == 0) { 259 u_short last_port; 260 void *t; 261 262 /* XXX IN6P_LOWPORT */ 263 264 /* value out of range */ 265 if (head->in6p_lport < IPV6PORT_ANONMIN) 266 head->in6p_lport = IPV6PORT_ANONMIN; 267 else if (head->in6p_lport > IPV6PORT_ANONMAX) 268 head->in6p_lport = IPV6PORT_ANONMIN; 269 last_port = head->in6p_lport; 270 goto startover; /*to randomize*/ 271 for (;;) { 272 lport = htons(head->in6p_lport); 273 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 274 #if 0 275 t = in_pcblookup_bind(&tcbtable, 276 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 277 lport); 278 #else 279 t = NULL; 280 #endif 281 } else { 282 t = in6_pcblookup(head, &zeroin6_addr, 0, 283 &in6p->in6p_laddr, lport, wild); 284 } 285 if (t == 0) 286 break; 287 startover: 288 if (head->in6p_lport >= IPV6PORT_ANONMAX) 289 head->in6p_lport = IPV6PORT_ANONMIN; 290 else 291 head->in6p_lport++; 292 if (head->in6p_lport == last_port) 293 return (EADDRINUSE); 294 } 295 } 296 in6p->in6p_lport = lport; 297 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 298 return(0); 299 } 300 301 /* 302 * Connect from a socket to a specified address. 303 * Both address and port must be specified in argument sin6. 304 * If don't have a local address for this socket yet, 305 * then pick one. 306 */ 307 int 308 in6_pcbconnect(in6p, nam) 309 struct in6pcb *in6p; 310 struct mbuf *nam; 311 { 312 struct in6_addr *in6a = NULL; 313 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 314 struct in6_pktinfo *pi; 315 struct ifnet *ifp = NULL; /* outgoing interface */ 316 int error = 0; 317 struct in6_addr mapped; 318 319 (void)&in6a; /* XXX fool gcc */ 320 321 if (nam->m_len != sizeof(*sin6)) 322 return(EINVAL); 323 if (sin6->sin6_family != AF_INET6) 324 return(EAFNOSUPPORT); 325 if (sin6->sin6_port == 0) 326 return(EADDRNOTAVAIL); 327 328 /* sanity check for mapped address case */ 329 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 330 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 331 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 332 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 333 return EINVAL; 334 } else { 335 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 336 return EINVAL; 337 } 338 339 /* 340 * If the scope of the destination is link-local, embed the interface 341 * index in the address. 342 */ 343 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 344 /* XXX boundary check is assumed to be already done. */ 345 /* XXX sin6_scope_id is weaker than advanced-api. */ 346 if (in6p->in6p_outputopts && 347 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 348 pi->ipi6_ifindex) { 349 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 350 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 351 } 352 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 353 in6p->in6p_moptions && 354 in6p->in6p_moptions->im6o_multicast_ifp) { 355 sin6->sin6_addr.s6_addr16[1] = 356 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 357 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 358 } else if (sin6->sin6_scope_id) { 359 /* boundary check */ 360 if (sin6->sin6_scope_id < 0 361 || if_index < sin6->sin6_scope_id) { 362 return ENXIO; /* XXX EINVAL? */ 363 } 364 sin6->sin6_addr.s6_addr16[1] 365 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 366 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 367 } 368 } 369 370 /* Source address selection. */ 371 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 372 && in6p->in6p_laddr.s6_addr32[3] == 0) { 373 struct sockaddr_in sin, *sinp; 374 375 bzero(&sin, sizeof(sin)); 376 sin.sin_len = sizeof(sin); 377 sin.sin_family = AF_INET; 378 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 379 sizeof(sin.sin_addr)); 380 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 381 in6p->in6p_socket->so_options, NULL, &error); 382 if (sinp == 0) { 383 if (error == 0) 384 error = EADDRNOTAVAIL; 385 return(error); 386 } 387 bzero(&mapped, sizeof(mapped)); 388 mapped.s6_addr16[5] = htons(0xffff); 389 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 390 in6a = &mapped; 391 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 392 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 393 in6p->in6p_moptions, &in6p->in6p_route, 394 &error); 395 if (in6a == 0) { 396 if (error == 0) 397 error = EADDRNOTAVAIL; 398 return(error); 399 } 400 } 401 if (in6p->in6p_route.ro_rt) 402 ifp = in6p->in6p_route.ro_rt->rt_ifp; 403 404 /* 405 * Default hop limit selection. If a hoplimit was specified via ioctl, 406 * use it. Else if the outgoing interface is detected and the current 407 * hop limit of the interface was specified by router advertisement, 408 * use the value. 409 * Otherwise, use the system default hoplimit. 410 */ 411 if (in6p->in6p_hops >= 0) 412 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 413 else if (ifp) 414 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 415 else 416 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 417 418 if (in6_pcblookup(in6p->in6p_head, 419 &sin6->sin6_addr, 420 sin6->sin6_port, 421 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 422 in6a : &in6p->in6p_laddr, 423 in6p->in6p_lport, 424 0)) 425 return(EADDRINUSE); 426 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 427 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 428 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 429 if (in6p->in6p_lport == 0) 430 (void)in6_pcbbind(in6p, (struct mbuf *)0); 431 in6p->in6p_laddr = *in6a; 432 } 433 in6p->in6p_faddr = sin6->sin6_addr; 434 in6p->in6p_fport = sin6->sin6_port; 435 /* 436 * xxx kazu flowlabel is necessary for connect? 437 * but if this line is missing, the garbage value remains. 438 */ 439 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 440 return(0); 441 } 442 443 /* 444 * Return an IPv6 address, which is the most appropriate for given 445 * destination and user specified options. 446 * If necessary, this function lookups the routing table and return 447 * an entry to the caller for later use. 448 */ 449 struct in6_addr * 450 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 451 struct sockaddr_in6 *dstsock; 452 struct ip6_pktopts *opts; 453 struct ip6_moptions *mopts; 454 struct route_in6 *ro; 455 int *errorp; 456 { 457 struct in6_addr *dst; 458 struct in6_ifaddr *ia6 = 0; 459 struct in6_pktinfo *pi; 460 461 dst = &dstsock->sin6_addr; 462 *errorp = 0; 463 464 /* 465 * If the source address is explicitly specified by the caller, 466 * use it. 467 * If the caller doesn't specify the source address but 468 * the outgoing interface, use an address associated with 469 * the interface. 470 */ 471 if (opts && (pi = opts->ip6po_pktinfo)) { 472 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 473 return(&pi->ipi6_addr); 474 else if (pi->ipi6_ifindex) { 475 /* XXX boundary check is assumed to be already done. */ 476 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 477 dst); 478 if (ia6 == 0) { 479 *errorp = EADDRNOTAVAIL; 480 return(0); 481 } 482 return(&satosin6(&ia6->ia_addr)->sin6_addr); 483 } 484 } 485 486 /* 487 * If the destination address is a multicast address and 488 * the outgoing interface for the address is specified 489 * by the caller, use an address associated with the interface. 490 * There is a sanity check here; if the destination has node-local 491 * scope, the outgoing interfacde should be a loopback address. 492 * Even if the outgoing interface is not specified, we also 493 * choose a loopback interface as the outgoing interface. 494 */ 495 if (IN6_IS_ADDR_MULTICAST(dst)) { 496 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 497 #ifdef __bsdi__ 498 extern struct ifnet loif; 499 #endif 500 501 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 502 #ifdef __bsdi__ 503 ifp = &loif; 504 #else 505 ifp = &loif[0]; 506 #endif 507 } 508 509 if (ifp) { 510 ia6 = in6_ifawithscope(ifp, dst); 511 if (ia6 == 0) { 512 *errorp = EADDRNOTAVAIL; 513 return(0); 514 } 515 return(&satosin6(&ia6->ia_addr)->sin6_addr); 516 } 517 } 518 519 /* 520 * XXX How should we use sin6_scope_id??? 521 */ 522 523 /* 524 * If the next hop address for the packet is specified 525 * by caller, use an address associated with the route 526 * to the next hop. 527 */ 528 { 529 struct sockaddr_in6 *sin6_next; 530 struct rtentry *rt; 531 532 if (opts && opts->ip6po_nexthop) { 533 sin6_next = satosin6(opts->ip6po_nexthop); 534 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 535 if (rt) { 536 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 537 if (ia6 == 0) 538 ia6 = ifatoia6(rt->rt_ifa); 539 } 540 if (ia6 == 0) { 541 *errorp = EADDRNOTAVAIL; 542 return(0); 543 } 544 return(&satosin6(&ia6->ia_addr)->sin6_addr); 545 } 546 } 547 548 /* 549 * If route is known or can be allocated now, 550 * our src addr is taken from the i/f, else punt. 551 */ 552 if (ro) { 553 if (ro->ro_rt && 554 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 555 RTFREE(ro->ro_rt); 556 ro->ro_rt = (struct rtentry *)0; 557 } 558 if (ro->ro_rt == (struct rtentry *)0 || 559 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 560 /* No route yet, so try to acquire one */ 561 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 562 ro->ro_dst.sin6_family = AF_INET6; 563 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 564 ro->ro_dst.sin6_addr = *dst; 565 if (IN6_IS_ADDR_MULTICAST(dst)) { 566 #ifdef __FreeBSD__ 567 ro->ro_rt = rtalloc1(&((struct route *)ro) 568 ->ro_dst, 0, 0UL); 569 #endif /*__FreeBSD__*/ 570 #if defined(__bsdi__) || defined(__NetBSD__) 571 ro->ro_rt = rtalloc1(&((struct route *)ro) 572 ->ro_dst, 0); 573 #endif /*__bsdi__*/ 574 } else { 575 #if 0 /* XXX Is this correct? */ 576 rtcalloc((struct route *)ro); 577 #else 578 rtalloc((struct route *)ro); 579 #endif 580 } 581 } 582 583 /* 584 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 585 * the address. But we don't know why it does so. 586 * It is necessary to ensure the scope even for lo0 587 * so doesn't check out IFF_LOOPBACK. 588 */ 589 590 if (ro->ro_rt) { 591 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 592 if (ia6 == 0) /* xxx scope error ?*/ 593 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 594 } 595 #if 0 596 /* 597 * xxx The followings are necessary? (kazu) 598 * I don't think so. 599 * It's for SO_DONTROUTE option in IPv4.(jinmei) 600 */ 601 if (ia6 == 0) { 602 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 603 604 sin6->sin6_addr = *dst; 605 606 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 607 if (ia6 == 0) 608 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 609 if (ia6 == 0) 610 return(0); 611 return(&satosin6(&ia6->ia_addr)->sin6_addr); 612 } 613 #endif /* 0 */ 614 if (ia6 == 0) { 615 *errorp = EHOSTUNREACH; /* no route */ 616 return(0); 617 } 618 return(&satosin6(&ia6->ia_addr)->sin6_addr); 619 } 620 621 *errorp = EADDRNOTAVAIL; 622 return(0); 623 } 624 625 void 626 in6_pcbdisconnect(in6p) 627 struct in6pcb *in6p; 628 { 629 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 630 in6p->in6p_fport = 0; 631 if (in6p->in6p_socket->so_state & SS_NOFDREF) 632 in6_pcbdetach(in6p); 633 } 634 635 void 636 in6_pcbdetach(in6p) 637 struct in6pcb *in6p; 638 { 639 struct socket *so = in6p->in6p_socket; 640 641 #ifdef IPSEC 642 if (sotoin6pcb(so) != 0) 643 key_freeso(so); 644 ipsec6_delete_pcbpolicy(in6p); 645 #endif /* IPSEC */ 646 sotoin6pcb(so) = 0; 647 sofree(so); 648 if (in6p->in6p_options) 649 m_freem(in6p->in6p_options); 650 if (in6p->in6p_outputopts) { 651 if (in6p->in6p_outputopts->ip6po_rthdr && 652 in6p->in6p_outputopts->ip6po_route.ro_rt) 653 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 654 if (in6p->in6p_outputopts->ip6po_m) 655 (void)m_free(in6p->in6p_outputopts->ip6po_m); 656 free(in6p->in6p_outputopts, M_IP6OPT); 657 } 658 if (in6p->in6p_route.ro_rt) 659 rtfree(in6p->in6p_route.ro_rt); 660 ip6_freemoptions(in6p->in6p_moptions); 661 #if 0 662 remque(in6p); 663 #else 664 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 665 in6p->in6p_prev->in6p_next = in6p->in6p_next; 666 in6p->in6p_prev = NULL; 667 #endif 668 FREE(in6p, M_PCB); 669 } 670 671 void 672 in6_setsockaddr(in6p, nam) 673 struct in6pcb *in6p; 674 struct mbuf *nam; 675 { 676 struct sockaddr_in6 *sin6; 677 678 nam->m_len = sizeof(*sin6); 679 sin6 = mtod(nam, struct sockaddr_in6 *); 680 bzero((caddr_t)sin6, sizeof(*sin6)); 681 sin6->sin6_family = AF_INET6; 682 sin6->sin6_len = sizeof(struct sockaddr_in6); 683 sin6->sin6_port = in6p->in6p_lport; 684 sin6->sin6_addr = in6p->in6p_laddr; 685 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 686 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 687 else 688 sin6->sin6_scope_id = 0; /*XXX*/ 689 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 690 sin6->sin6_addr.s6_addr16[1] = 0; 691 } 692 693 void 694 in6_setpeeraddr(in6p, nam) 695 struct in6pcb *in6p; 696 struct mbuf *nam; 697 { 698 struct sockaddr_in6 *sin6; 699 700 nam->m_len = sizeof(*sin6); 701 sin6 = mtod(nam, struct sockaddr_in6 *); 702 bzero((caddr_t)sin6, sizeof(*sin6)); 703 sin6->sin6_family = AF_INET6; 704 sin6->sin6_len = sizeof(struct sockaddr_in6); 705 sin6->sin6_port = in6p->in6p_fport; 706 sin6->sin6_addr = in6p->in6p_faddr; 707 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 708 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 709 else 710 sin6->sin6_scope_id = 0; /*XXX*/ 711 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 712 sin6->sin6_addr.s6_addr16[1] = 0; 713 } 714 715 /* 716 * Pass some notification to all connections of a protocol 717 * associated with address dst. The local address and/or port numbers 718 * may be specified to limit the search. The "usual action" will be 719 * taken, depending on the ctlinput cmd. The caller must filter any 720 * cmds that are uninteresting (e.g., no error in the map). 721 * Call the protocol specific routine (if any) to report 722 * any errors for each matching socket. 723 * 724 * Must be called at splnet. 725 */ 726 int 727 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 728 struct in6pcb *head; 729 struct sockaddr *dst; 730 u_int fport_arg, lport_arg; 731 struct in6_addr *laddr6; 732 int cmd; 733 void (*notify) __P((struct in6pcb *, int)); 734 { 735 struct in6pcb *in6p, *oin6p; 736 struct in6_addr faddr6; 737 u_short fport = fport_arg, lport = lport_arg; 738 int errno; 739 int nmatch = 0; 740 741 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 742 return 0; 743 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 744 if (IN6_IS_ADDR_ANY(&faddr6)) 745 return 0; 746 747 /* 748 * Redirects go to all references to the destination, 749 * and use in_rtchange to invalidate the route cache. 750 * Dead host indications: notify all references to the destination. 751 * Otherwise, if we have knowledge of the local port and address, 752 * deliver only to that socket. 753 */ 754 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 755 fport = 0; 756 lport = 0; 757 bzero((caddr_t)laddr6, sizeof(*laddr6)); 758 if (cmd != PRC_HOSTDEAD) 759 notify = in6_rtchange; 760 } 761 if (notify == NULL) 762 return 0; 763 errno = inet6ctlerrmap[cmd]; 764 for (in6p = head->in6p_next; in6p != head;) { 765 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 766 in6p->in6p_socket == 0 || 767 (lport && in6p->in6p_lport != lport) || 768 (!IN6_IS_ADDR_ANY(laddr6) && 769 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 770 (fport && in6p->in6p_fport != fport)) { 771 in6p = in6p->in6p_next; 772 continue; 773 } 774 oin6p = in6p; 775 in6p = in6p->in6p_next; 776 (*notify)(oin6p, errno); 777 nmatch++; 778 } 779 return nmatch; 780 } 781 782 /* 783 * Check for alternatives when higher level complains 784 * about service problems. For now, invalidate cached 785 * routing information. If the route was created dynamically 786 * (by a redirect), time to try a default gateway again. 787 */ 788 void 789 in6_losing(in6p) 790 struct in6pcb *in6p; 791 { 792 struct rtentry *rt; 793 struct rt_addrinfo info; 794 795 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 796 in6p->in6p_route.ro_rt = 0; 797 bzero((caddr_t)&info, sizeof(info)); 798 info.rti_info[RTAX_DST] = 799 (struct sockaddr *)&in6p->in6p_route.ro_dst; 800 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 801 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 802 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 803 if (rt->rt_flags & RTF_DYNAMIC) 804 (void)rtrequest(RTM_DELETE, rt_key(rt), 805 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 806 (struct rtentry **)0); 807 else 808 /* 809 * A new route can be allocated 810 * the next time output is attempted. 811 */ 812 rtfree(rt); 813 } 814 } 815 816 /* 817 * After a routing change, flush old routing 818 * and allocate a (hopefully) better one. 819 */ 820 void 821 in6_rtchange(in6p, errno) 822 struct in6pcb *in6p; 823 int errno; 824 { 825 if (in6p->in6p_route.ro_rt) { 826 rtfree(in6p->in6p_route.ro_rt); 827 in6p->in6p_route.ro_rt = 0; 828 /* 829 * A new route can be allocated the next time 830 * output is attempted. 831 */ 832 } 833 } 834 835 struct in6pcb * 836 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 837 struct in6pcb *head; 838 struct in6_addr *faddr6, *laddr6; 839 u_int fport_arg, lport_arg; 840 int flags; 841 { 842 struct in6pcb *in6p, *match = 0; 843 int matchwild = 3, wildcard; 844 u_short fport = fport_arg, lport = lport_arg; 845 846 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 847 if (in6p->in6p_lport != lport) 848 continue; 849 wildcard = 0; 850 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 851 if (IN6_IS_ADDR_ANY(laddr6)) 852 wildcard++; 853 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 854 continue; 855 } else { 856 if (!IN6_IS_ADDR_ANY(laddr6)) 857 wildcard++; 858 } 859 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 860 if (IN6_IS_ADDR_ANY(faddr6)) 861 wildcard++; 862 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 863 || in6p->in6p_fport != fport) 864 continue; 865 } else { 866 if (!IN6_IS_ADDR_ANY(faddr6)) 867 wildcard++; 868 } 869 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 870 continue; 871 if (wildcard < matchwild) { 872 match = in6p; 873 matchwild = wildcard; 874 if (matchwild == 0) 875 break; 876 } 877 } 878 return(match); 879 } 880 881 #ifndef TCP6 882 struct rtentry * 883 in6_pcbrtentry(in6p) 884 struct in6pcb *in6p; 885 { 886 struct route_in6 *ro; 887 888 ro = &in6p->in6p_route; 889 890 if (ro->ro_rt == NULL) { 891 /* 892 * No route yet, so try to acquire one. 893 */ 894 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 895 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 896 ro->ro_dst.sin6_family = AF_INET6; 897 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 898 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 899 rtalloc((struct route *)ro); 900 } 901 } 902 return (ro->ro_rt); 903 } 904 905 struct in6pcb * 906 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg) 907 struct in6pcb *head; 908 struct in6_addr *faddr6, *laddr6; 909 u_int fport_arg, lport_arg; 910 { 911 struct in6pcb *in6p; 912 u_short fport = fport_arg, lport = lport_arg; 913 914 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 915 /* find exact match on both source and dest */ 916 if (in6p->in6p_fport != fport) 917 continue; 918 if (in6p->in6p_lport != lport) 919 continue; 920 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 921 continue; 922 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 923 continue; 924 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 925 continue; 926 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 927 continue; 928 return in6p; 929 } 930 return NULL; 931 } 932 933 struct in6pcb * 934 in6_pcblookup_bind(head, laddr6, lport_arg) 935 struct in6pcb *head; 936 struct in6_addr *laddr6; 937 u_int lport_arg; 938 { 939 struct in6pcb *in6p, *match; 940 u_short lport = lport_arg; 941 942 match = NULL; 943 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 944 /* 945 * find destination match. exact match is preferred 946 * against wildcard match. 947 */ 948 if (in6p->in6p_fport != 0) 949 continue; 950 if (in6p->in6p_lport != lport) 951 continue; 952 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 953 match = in6p; 954 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 955 return in6p; 956 } 957 return match; 958 } 959 #endif 960
Indexes created Tue Oct 21 19:09:51 GMT 2025