in6_pcb.c revision 1.5
1 /* $NetBSD: in6_pcb.c,v 1.5 1999/07/03 21:30:18 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/malloc.h> 70 #include <sys/mbuf.h> 71 #include <sys/protosw.h> 72 #include <sys/socket.h> 73 #include <sys/socketvar.h> 74 #include <sys/ioctl.h> 75 #include <sys/errno.h> 76 #include <sys/time.h> 77 #include <sys/proc.h> 78 79 #include <net/if.h> 80 #include <net/route.h> 81 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/in_systm.h> 85 #include <netinet/ip.h> 86 #include <netinet/in_pcb.h> 87 #include <netinet6/ip6.h> 88 #include <netinet6/in6_pcb.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/nd6.h> 91 92 #include "loop.h" 93 #ifdef __NetBSD__ 94 extern struct ifnet loif[NLOOP]; 95 #endif 96 97 #ifdef IPSEC 98 #include <netinet6/ipsec.h> 99 #include <netkey/key.h> 100 #include <netkey/key_debug.h> 101 #endif /* IPSEC */ 102 103 struct in6_addr zeroin6_addr; 104 105 int 106 in6_pcballoc(so, head) 107 struct socket *so; 108 struct in6pcb *head; 109 { 110 struct in6pcb *in6p; 111 112 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 113 if (in6p == NULL) 114 return(ENOBUFS); 115 bzero((caddr_t)in6p, sizeof(*in6p)); 116 in6p->in6p_head = head; 117 in6p->in6p_socket = so; 118 in6p->in6p_hops = -1; /* use kernel default */ 119 in6p->in6p_icmp6filt = NULL; 120 #if 0 121 insque(in6p, head); 122 #else 123 in6p->in6p_next = head->in6p_next; 124 head->in6p_next = in6p; 125 in6p->in6p_prev = head; 126 in6p->in6p_next->in6p_prev = in6p; 127 #endif 128 so->so_pcb = (caddr_t)in6p; 129 return(0); 130 } 131 132 int 133 in6_pcbbind(in6p, nam) 134 register struct in6pcb *in6p; 135 struct mbuf *nam; 136 { 137 struct socket *so = in6p->in6p_socket; 138 struct in6pcb *head = in6p->in6p_head; 139 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 140 struct proc *p = curproc; /* XXX */ 141 u_short lport = 0; 142 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 143 int error; 144 145 if (in6p->in6p_lport || !IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) 146 return(EINVAL); 147 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 148 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 149 (so->so_options & SO_ACCEPTCONN) == 0)) 150 wild = IN6PLOOKUP_WILDCARD; 151 if (nam) { 152 sin6 = mtod(nam, struct sockaddr_in6 *); 153 if (nam->m_len != sizeof(*sin6)) 154 return(EINVAL); 155 /* 156 * We should check the family, but old programs 157 * incorrectly fail to intialize it. 158 */ 159 if (sin6->sin6_family != AF_INET6) 160 return(EAFNOSUPPORT); 161 162 /* 163 * If the scope of the destination is link-local, embed the 164 * interface index in the address. 165 */ 166 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 167 /* XXX boundary check is assumed to be already done. */ 168 /* XXX sin6_scope_id is weaker than advanced-api. */ 169 struct in6_pktinfo *pi; 170 if (in6p->in6p_outputopts && 171 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 172 pi->ipi6_ifindex) { 173 sin6->sin6_addr.s6_addr16[1] 174 = htons(pi->ipi6_ifindex); 175 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 176 && in6p->in6p_moptions 177 && in6p->in6p_moptions->im6o_multicast_ifp) { 178 sin6->sin6_addr.s6_addr16[1] = 179 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 180 } else if (sin6->sin6_scope_id) { 181 /* boundary check */ 182 if (sin6->sin6_scope_id < 0 183 || if_index < sin6->sin6_scope_id) { 184 return ENXIO; /* XXX EINVAL? */ 185 } 186 sin6->sin6_addr.s6_addr16[1] 187 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 188 /* this must be cleared for ifa_ifwithaddr() */ 189 sin6->sin6_scope_id = 0; 190 } 191 } 192 193 lport = sin6->sin6_port; 194 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 195 /* 196 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 197 * allow compepte duplication of binding if 198 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 199 * and a multicast address is bound on both 200 * new and duplicated sockets. 201 */ 202 if (so->so_options & SO_REUSEADDR) 203 reuseport = SO_REUSEADDR|SO_REUSEPORT; 204 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 205 struct sockaddr_in sin; 206 207 bzero(&sin, sizeof(sin)); 208 sin.sin_len = sizeof(sin); 209 sin.sin_family = AF_INET; 210 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 211 sizeof(sin.sin_addr)); 212 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 213 return EADDRNOTAVAIL; 214 } else if (!IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 215 struct ifaddr *ia = NULL; 216 217 sin6->sin6_port = 0; /* yech... */ 218 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 219 return(EADDRNOTAVAIL); 220 221 /* 222 * XXX: bind to an anycast address might accidentally 223 * cause sending a packet with anycast source address. 224 */ 225 if (ia && 226 ((struct in6_ifaddr *)ia)->ia6_flags & 227 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 228 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 229 return(EADDRNOTAVAIL); 230 } 231 } 232 if (lport) { 233 /* GROSS */ 234 if (ntohs(lport) < IPV6PORT_RESERVED && 235 (error = suser(p->p_ucred, &p->p_acflag))) 236 return(EACCES); 237 238 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 239 /* should check this but we can't ... */ 240 #if 0 241 struct inpcb *t; 242 243 t = in_pcblookup_bind(&tcbtable, 244 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 245 lport); 246 if (t && (reuseport & t->inp_socket->so_options) == 0) 247 return EADDRINUSE; 248 #endif 249 } else { 250 struct in6pcb *t; 251 252 t = in6_pcblookup(head, &zeroin6_addr, 0, 253 &sin6->sin6_addr, lport, wild); 254 if (t && (reuseport & t->in6p_socket->so_options) == 0) 255 return(EADDRINUSE); 256 } 257 } 258 in6p->in6p_laddr = sin6->sin6_addr; 259 } 260 if (lport == 0) { 261 u_short last_port; 262 void *t; 263 264 /* XXX IN6P_LOWPORT */ 265 266 /* value out of range */ 267 if (head->in6p_lport < IPV6PORT_ANONMIN) 268 head->in6p_lport = IPV6PORT_ANONMIN; 269 else if (head->in6p_lport > IPV6PORT_ANONMAX) 270 head->in6p_lport = IPV6PORT_ANONMIN; 271 last_port = head->in6p_lport; 272 goto startover; /*to randomize*/ 273 for (;;) { 274 lport = htons(head->in6p_lport); 275 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 276 #if 0 277 t = in_pcblookup_bind(&tcbtable, 278 (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], 279 lport); 280 #else 281 t = NULL; 282 #endif 283 } else { 284 t = in6_pcblookup(head, &zeroin6_addr, 0, 285 &in6p->in6p_laddr, lport, wild); 286 } 287 if (t == 0) 288 break; 289 startover: 290 if (head->in6p_lport >= IPV6PORT_ANONMAX) 291 head->in6p_lport = IPV6PORT_ANONMIN; 292 else 293 head->in6p_lport++; 294 if (head->in6p_lport == last_port) 295 return (EADDRINUSE); 296 } 297 } 298 in6p->in6p_lport = lport; 299 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 300 return(0); 301 } 302 303 /* 304 * Connect from a socket to a specified address. 305 * Both address and port must be specified in argument sin6. 306 * If don't have a local address for this socket yet, 307 * then pick one. 308 */ 309 int 310 in6_pcbconnect(in6p, nam) 311 struct in6pcb *in6p; 312 struct mbuf *nam; 313 { 314 struct in6_addr *in6a = NULL; 315 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 316 struct in6_pktinfo *pi; 317 struct ifnet *ifp = NULL; /* outgoing interface */ 318 int error = 0; 319 struct in6_addr mapped; 320 321 (void)&in6a; /* XXX fool gcc */ 322 323 if (nam->m_len != sizeof(*sin6)) 324 return(EINVAL); 325 if (sin6->sin6_family != AF_INET6) 326 return(EAFNOSUPPORT); 327 if (sin6->sin6_port == 0) 328 return(EADDRNOTAVAIL); 329 330 /* sanity check for mapped address case */ 331 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 332 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 333 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 334 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 335 return EINVAL; 336 } else { 337 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 338 return EINVAL; 339 } 340 341 /* 342 * If the scope of the destination is link-local, embed the interface 343 * index in the address. 344 */ 345 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 346 /* XXX boundary check is assumed to be already done. */ 347 /* XXX sin6_scope_id is weaker than advanced-api. */ 348 if (in6p->in6p_outputopts && 349 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 350 pi->ipi6_ifindex) { 351 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 352 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 353 } 354 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 355 in6p->in6p_moptions && 356 in6p->in6p_moptions->im6o_multicast_ifp) { 357 sin6->sin6_addr.s6_addr16[1] = 358 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 359 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 360 } else if (sin6->sin6_scope_id) { 361 /* boundary check */ 362 if (sin6->sin6_scope_id < 0 363 || if_index < sin6->sin6_scope_id) { 364 return ENXIO; /* XXX EINVAL? */ 365 } 366 sin6->sin6_addr.s6_addr16[1] 367 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 368 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 369 } 370 } 371 372 /* Source address selection. */ 373 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 374 && in6p->in6p_laddr.s6_addr32[3] == 0) { 375 struct sockaddr_in sin, *sinp; 376 377 bzero(&sin, sizeof(sin)); 378 sin.sin_len = sizeof(sin); 379 sin.sin_family = AF_INET; 380 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 381 sizeof(sin.sin_addr)); 382 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 383 in6p->in6p_socket->so_options, NULL, &error); 384 if (sinp == 0) { 385 if (error == 0) 386 error = EADDRNOTAVAIL; 387 return(error); 388 } 389 bzero(&mapped, sizeof(mapped)); 390 mapped.s6_addr16[5] = htons(0xffff); 391 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 392 in6a = &mapped; 393 } else if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 394 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 395 in6p->in6p_moptions, &in6p->in6p_route, 396 &error); 397 if (in6a == 0) { 398 if (error == 0) 399 error = EADDRNOTAVAIL; 400 return(error); 401 } 402 } 403 if (in6p->in6p_route.ro_rt) 404 ifp = in6p->in6p_route.ro_rt->rt_ifp; 405 406 /* 407 * Default hop limit selection. If a hoplimit was specified via ioctl, 408 * use it. Else if the outgoing interface is detected and the current 409 * hop limit of the interface was specified by router advertisement, 410 * use the value. 411 * Otherwise, use the system default hoplimit. 412 */ 413 if (in6p->in6p_hops >= 0) 414 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6p->in6p_hops; 415 else if (ifp) 416 in6p->in6p_ip6.ip6_hlim = nd_ifinfo[ifp->if_index].chlim; 417 else 418 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 419 420 if (in6_pcblookup(in6p->in6p_head, 421 &sin6->sin6_addr, 422 sin6->sin6_port, 423 IN6_IS_ADDR_ANY(&in6p->in6p_laddr) ? 424 in6a : &in6p->in6p_laddr, 425 in6p->in6p_lport, 426 0)) 427 return(EADDRINUSE); 428 if (IN6_IS_ADDR_ANY(&in6p->in6p_laddr) 429 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 430 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 431 if (in6p->in6p_lport == 0) 432 (void)in6_pcbbind(in6p, (struct mbuf *)0); 433 in6p->in6p_laddr = *in6a; 434 } 435 in6p->in6p_faddr = sin6->sin6_addr; 436 in6p->in6p_fport = sin6->sin6_port; 437 /* 438 * xxx kazu flowlabel is necessary for connect? 439 * but if this line is missing, the garbage value remains. 440 */ 441 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 442 return(0); 443 } 444 445 /* 446 * Return an IPv6 address, which is the most appropriate for given 447 * destination and user specified options. 448 * If necessary, this function lookups the routing table and return 449 * an entry to the caller for later use. 450 */ 451 struct in6_addr * 452 in6_selectsrc(dstsock, opts, mopts, ro, errorp) 453 struct sockaddr_in6 *dstsock; 454 struct ip6_pktopts *opts; 455 struct ip6_moptions *mopts; 456 struct route_in6 *ro; 457 int *errorp; 458 { 459 struct in6_addr *dst; 460 struct in6_ifaddr *ia6 = 0; 461 struct in6_pktinfo *pi; 462 463 dst = &dstsock->sin6_addr; 464 *errorp = 0; 465 466 /* 467 * If the source address is explicitly specified by the caller, 468 * use it. 469 * If the caller doesn't specify the source address but 470 * the outgoing interface, use an address associated with 471 * the interface. 472 */ 473 if (opts && (pi = opts->ip6po_pktinfo)) { 474 if (!IN6_IS_ADDR_ANY(&pi->ipi6_addr)) 475 return(&pi->ipi6_addr); 476 else if (pi->ipi6_ifindex) { 477 /* XXX boundary check is assumed to be already done. */ 478 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 479 dst); 480 if (ia6 == 0) { 481 *errorp = EADDRNOTAVAIL; 482 return(0); 483 } 484 return(&satosin6(&ia6->ia_addr)->sin6_addr); 485 } 486 } 487 488 /* 489 * If the destination address is a multicast address and 490 * the outgoing interface for the address is specified 491 * by the caller, use an address associated with the interface. 492 * There is a sanity check here; if the destination has node-local 493 * scope, the outgoing interfacde should be a loopback address. 494 * Even if the outgoing interface is not specified, we also 495 * choose a loopback interface as the outgoing interface. 496 */ 497 if (IN6_IS_ADDR_MULTICAST(dst)) { 498 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 499 #ifdef __bsdi__ 500 extern struct ifnet loif; 501 #endif 502 503 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 504 #ifdef __bsdi__ 505 ifp = &loif; 506 #else 507 ifp = &loif[0]; 508 #endif 509 } 510 511 if (ifp) { 512 ia6 = in6_ifawithscope(ifp, dst); 513 if (ia6 == 0) { 514 *errorp = EADDRNOTAVAIL; 515 return(0); 516 } 517 return(&satosin6(&ia6->ia_addr)->sin6_addr); 518 } 519 } 520 521 /* 522 * XXX How should we use sin6_scope_id??? 523 */ 524 525 /* 526 * If the next hop address for the packet is specified 527 * by caller, use an address associated with the route 528 * to the next hop. 529 */ 530 { 531 struct sockaddr_in6 *sin6_next; 532 struct rtentry *rt; 533 534 if (opts && opts->ip6po_nexthop) { 535 sin6_next = satosin6(opts->ip6po_nexthop); 536 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 537 if (rt) { 538 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 539 if (ia6 == 0) 540 ia6 = ifatoia6(rt->rt_ifa); 541 } 542 if (ia6 == 0) { 543 *errorp = EADDRNOTAVAIL; 544 return(0); 545 } 546 return(&satosin6(&ia6->ia_addr)->sin6_addr); 547 } 548 } 549 550 /* 551 * If route is known or can be allocated now, 552 * our src addr is taken from the i/f, else punt. 553 */ 554 if (ro) { 555 if (ro->ro_rt && 556 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 557 RTFREE(ro->ro_rt); 558 ro->ro_rt = (struct rtentry *)0; 559 } 560 if (ro->ro_rt == (struct rtentry *)0 || 561 ro->ro_rt->rt_ifp == (struct ifnet *)0) { 562 /* No route yet, so try to acquire one */ 563 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 564 ro->ro_dst.sin6_family = AF_INET6; 565 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 566 ro->ro_dst.sin6_addr = *dst; 567 if (IN6_IS_ADDR_MULTICAST(dst)) { 568 #ifdef __FreeBSD__ 569 ro->ro_rt = rtalloc1(&((struct route *)ro) 570 ->ro_dst, 0, 0UL); 571 #endif /*__FreeBSD__*/ 572 #if defined(__bsdi__) || defined(__NetBSD__) 573 ro->ro_rt = rtalloc1(&((struct route *)ro) 574 ->ro_dst, 0); 575 #endif /*__bsdi__*/ 576 } else { 577 #if 0 /* XXX Is this correct? */ 578 rtcalloc((struct route *)ro); 579 #else 580 rtalloc((struct route *)ro); 581 #endif 582 } 583 } 584 585 /* 586 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 587 * the address. But we don't know why it does so. 588 * It is necessary to ensure the scope even for lo0 589 * so doesn't check out IFF_LOOPBACK. 590 */ 591 592 if (ro->ro_rt) { 593 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 594 if (ia6 == 0) /* xxx scope error ?*/ 595 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 596 } 597 #if 0 598 /* 599 * xxx The followings are necessary? (kazu) 600 * I don't think so. 601 * It's for SO_DONTROUTE option in IPv4.(jinmei) 602 */ 603 if (ia6 == 0) { 604 struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; 605 606 sin6->sin6_addr = *dst; 607 608 ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); 609 if (ia6 == 0) 610 ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); 611 if (ia6 == 0) 612 return(0); 613 return(&satosin6(&ia6->ia_addr)->sin6_addr); 614 } 615 #endif /* 0 */ 616 if (ia6 == 0) { 617 *errorp = EHOSTUNREACH; /* no route */ 618 return(0); 619 } 620 return(&satosin6(&ia6->ia_addr)->sin6_addr); 621 } 622 623 *errorp = EADDRNOTAVAIL; 624 return(0); 625 } 626 627 void 628 in6_pcbdisconnect(in6p) 629 struct in6pcb *in6p; 630 { 631 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 632 in6p->in6p_fport = 0; 633 if (in6p->in6p_socket->so_state & SS_NOFDREF) 634 in6_pcbdetach(in6p); 635 } 636 637 void 638 in6_pcbdetach(in6p) 639 struct in6pcb *in6p; 640 { 641 struct socket *so = in6p->in6p_socket; 642 643 #ifdef IPSEC 644 if (sotoin6pcb(so) != 0) 645 key_freeso(so); 646 ipsec6_delete_pcbpolicy(in6p); 647 #endif /* IPSEC */ 648 sotoin6pcb(so) = 0; 649 sofree(so); 650 if (in6p->in6p_options) 651 m_freem(in6p->in6p_options); 652 if (in6p->in6p_outputopts) { 653 if (in6p->in6p_outputopts->ip6po_rthdr && 654 in6p->in6p_outputopts->ip6po_route.ro_rt) 655 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 656 if (in6p->in6p_outputopts->ip6po_m) 657 (void)m_free(in6p->in6p_outputopts->ip6po_m); 658 free(in6p->in6p_outputopts, M_IP6OPT); 659 } 660 if (in6p->in6p_route.ro_rt) 661 rtfree(in6p->in6p_route.ro_rt); 662 ip6_freemoptions(in6p->in6p_moptions); 663 #if 0 664 remque(in6p); 665 #else 666 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 667 in6p->in6p_prev->in6p_next = in6p->in6p_next; 668 in6p->in6p_prev = NULL; 669 #endif 670 FREE(in6p, M_PCB); 671 } 672 673 void 674 in6_setsockaddr(in6p, nam) 675 struct in6pcb *in6p; 676 struct mbuf *nam; 677 { 678 struct sockaddr_in6 *sin6; 679 680 nam->m_len = sizeof(*sin6); 681 sin6 = mtod(nam, struct sockaddr_in6 *); 682 bzero((caddr_t)sin6, sizeof(*sin6)); 683 sin6->sin6_family = AF_INET6; 684 sin6->sin6_len = sizeof(struct sockaddr_in6); 685 sin6->sin6_port = in6p->in6p_lport; 686 sin6->sin6_addr = in6p->in6p_laddr; 687 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 688 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 689 else 690 sin6->sin6_scope_id = 0; /*XXX*/ 691 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 692 sin6->sin6_addr.s6_addr16[1] = 0; 693 } 694 695 void 696 in6_setpeeraddr(in6p, nam) 697 struct in6pcb *in6p; 698 struct mbuf *nam; 699 { 700 struct sockaddr_in6 *sin6; 701 702 nam->m_len = sizeof(*sin6); 703 sin6 = mtod(nam, struct sockaddr_in6 *); 704 bzero((caddr_t)sin6, sizeof(*sin6)); 705 sin6->sin6_family = AF_INET6; 706 sin6->sin6_len = sizeof(struct sockaddr_in6); 707 sin6->sin6_port = in6p->in6p_fport; 708 sin6->sin6_addr = in6p->in6p_faddr; 709 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 710 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 711 else 712 sin6->sin6_scope_id = 0; /*XXX*/ 713 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 714 sin6->sin6_addr.s6_addr16[1] = 0; 715 } 716 717 /* 718 * Pass some notification to all connections of a protocol 719 * associated with address dst. The local address and/or port numbers 720 * may be specified to limit the search. The "usual action" will be 721 * taken, depending on the ctlinput cmd. The caller must filter any 722 * cmds that are uninteresting (e.g., no error in the map). 723 * Call the protocol specific routine (if any) to report 724 * any errors for each matching socket. 725 * 726 * Must be called at splnet. 727 */ 728 int 729 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 730 struct in6pcb *head; 731 struct sockaddr *dst; 732 u_int fport_arg, lport_arg; 733 struct in6_addr *laddr6; 734 int cmd; 735 void (*notify) __P((struct in6pcb *, int)); 736 { 737 struct in6pcb *in6p, *oin6p; 738 struct in6_addr faddr6; 739 u_short fport = fport_arg, lport = lport_arg; 740 int errno; 741 int nmatch = 0; 742 743 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 744 return 0; 745 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 746 if (IN6_IS_ADDR_ANY(&faddr6)) 747 return 0; 748 749 /* 750 * Redirects go to all references to the destination, 751 * and use in_rtchange to invalidate the route cache. 752 * Dead host indications: notify all references to the destination. 753 * Otherwise, if we have knowledge of the local port and address, 754 * deliver only to that socket. 755 */ 756 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 757 fport = 0; 758 lport = 0; 759 bzero((caddr_t)laddr6, sizeof(*laddr6)); 760 if (cmd != PRC_HOSTDEAD) 761 notify = in6_rtchange; 762 } 763 if (notify == NULL) 764 return 0; 765 errno = inet6ctlerrmap[cmd]; 766 for (in6p = head->in6p_next; in6p != head;) { 767 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,&faddr6) || 768 in6p->in6p_socket == 0 || 769 (lport && in6p->in6p_lport != lport) || 770 (!IN6_IS_ADDR_ANY(laddr6) && 771 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 772 (fport && in6p->in6p_fport != fport)) { 773 in6p = in6p->in6p_next; 774 continue; 775 } 776 oin6p = in6p; 777 in6p = in6p->in6p_next; 778 (*notify)(oin6p, errno); 779 nmatch++; 780 } 781 return nmatch; 782 } 783 784 /* 785 * Check for alternatives when higher level complains 786 * about service problems. For now, invalidate cached 787 * routing information. If the route was created dynamically 788 * (by a redirect), time to try a default gateway again. 789 */ 790 void 791 in6_losing(in6p) 792 struct in6pcb *in6p; 793 { 794 struct rtentry *rt; 795 struct rt_addrinfo info; 796 797 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 798 in6p->in6p_route.ro_rt = 0; 799 bzero((caddr_t)&info, sizeof(info)); 800 info.rti_info[RTAX_DST] = 801 (struct sockaddr *)&in6p->in6p_route.ro_dst; 802 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 803 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 804 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 805 if (rt->rt_flags & RTF_DYNAMIC) 806 (void)rtrequest(RTM_DELETE, rt_key(rt), 807 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 808 (struct rtentry **)0); 809 else 810 /* 811 * A new route can be allocated 812 * the next time output is attempted. 813 */ 814 rtfree(rt); 815 } 816 } 817 818 /* 819 * After a routing change, flush old routing 820 * and allocate a (hopefully) better one. 821 */ 822 void 823 in6_rtchange(in6p, errno) 824 struct in6pcb *in6p; 825 int errno; 826 { 827 if (in6p->in6p_route.ro_rt) { 828 rtfree(in6p->in6p_route.ro_rt); 829 in6p->in6p_route.ro_rt = 0; 830 /* 831 * A new route can be allocated the next time 832 * output is attempted. 833 */ 834 } 835 } 836 837 struct in6pcb * 838 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 839 struct in6pcb *head; 840 struct in6_addr *faddr6, *laddr6; 841 u_int fport_arg, lport_arg; 842 int flags; 843 { 844 struct in6pcb *in6p, *match = 0; 845 int matchwild = 3, wildcard; 846 u_short fport = fport_arg, lport = lport_arg; 847 848 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 849 if (in6p->in6p_lport != lport) 850 continue; 851 wildcard = 0; 852 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 853 if (IN6_IS_ADDR_ANY(laddr6)) 854 wildcard++; 855 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 856 continue; 857 } else { 858 if (!IN6_IS_ADDR_ANY(laddr6)) 859 wildcard++; 860 } 861 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 862 if (IN6_IS_ADDR_ANY(faddr6)) 863 wildcard++; 864 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 865 || in6p->in6p_fport != fport) 866 continue; 867 } else { 868 if (!IN6_IS_ADDR_ANY(faddr6)) 869 wildcard++; 870 } 871 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 872 continue; 873 if (wildcard < matchwild) { 874 match = in6p; 875 matchwild = wildcard; 876 if (matchwild == 0) 877 break; 878 } 879 } 880 return(match); 881 } 882 883 #ifndef TCP6 884 struct rtentry * 885 in6_pcbrtentry(in6p) 886 struct in6pcb *in6p; 887 { 888 struct route_in6 *ro; 889 890 ro = &in6p->in6p_route; 891 892 if (ro->ro_rt == NULL) { 893 /* 894 * No route yet, so try to acquire one. 895 */ 896 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 897 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 898 ro->ro_dst.sin6_family = AF_INET6; 899 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 900 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 901 rtalloc((struct route *)ro); 902 } 903 } 904 return (ro->ro_rt); 905 } 906 907 struct in6pcb * 908 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg) 909 struct in6pcb *head; 910 struct in6_addr *faddr6, *laddr6; 911 u_int fport_arg, lport_arg; 912 { 913 struct in6pcb *in6p; 914 u_short fport = fport_arg, lport = lport_arg; 915 916 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 917 /* find exact match on both source and dest */ 918 if (in6p->in6p_fport != fport) 919 continue; 920 if (in6p->in6p_lport != lport) 921 continue; 922 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 923 continue; 924 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 925 continue; 926 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 927 continue; 928 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 929 continue; 930 return in6p; 931 } 932 return NULL; 933 } 934 935 struct in6pcb * 936 in6_pcblookup_bind(head, laddr6, lport_arg) 937 struct in6pcb *head; 938 struct in6_addr *laddr6; 939 u_int lport_arg; 940 { 941 struct in6pcb *in6p, *match; 942 u_short lport = lport_arg; 943 944 match = NULL; 945 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 946 /* 947 * find destination match. exact match is preferred 948 * against wildcard match. 949 */ 950 if (in6p->in6p_fport != 0) 951 continue; 952 if (in6p->in6p_lport != lport) 953 continue; 954 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 955 match = in6p; 956 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 957 return in6p; 958 } 959 return match; 960 } 961 #endif 962
Indexes created Mon Sep 22 13:09:51 GMT 2025