in6_pcb.c revision 1.26
1 /* $NetBSD: in6_pcb.c,v 1.26 2000/06/08 13:51:33 itojun Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.45 2000/06/05 00:41:58 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/time.h> 80 #include <sys/proc.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/in6_pcb.h> 93 #include <netinet6/nd6.h> 94 95 #include "loop.h" 96 extern struct ifnet loif[NLOOP]; 97 #include "faith.h" 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #include <netkey/key.h> 102 #include <netkey/key_debug.h> 103 #endif /* IPSEC */ 104 105 struct in6_addr zeroin6_addr; 106 107 int 108 in6_pcballoc(so, head) 109 struct socket *so; 110 struct in6pcb *head; 111 { 112 struct in6pcb *in6p; 113 114 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 115 if (in6p == NULL) 116 return(ENOBUFS); 117 bzero((caddr_t)in6p, sizeof(*in6p)); 118 in6p->in6p_head = head; 119 in6p->in6p_socket = so; 120 in6p->in6p_hops = -1; /* use kernel default */ 121 in6p->in6p_icmp6filt = NULL; 122 in6p->in6p_next = head->in6p_next; 123 head->in6p_next = in6p; 124 in6p->in6p_prev = head; 125 in6p->in6p_next->in6p_prev = in6p; 126 #ifndef INET6_BINDV6ONLY 127 if (ip6_bindv6only) 128 in6p->in6p_flags |= IN6P_BINDV6ONLY; 129 #else 130 in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/ 131 #endif 132 so->so_pcb = (caddr_t)in6p; 133 return(0); 134 } 135 136 int 137 in6_pcbbind(in6p, nam, p) 138 register struct in6pcb *in6p; 139 struct mbuf *nam; 140 struct proc *p; 141 { 142 struct socket *so = in6p->in6p_socket; 143 struct in6pcb *head = in6p->in6p_head; 144 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 145 u_int16_t lport = 0; 146 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 147 int error; 148 149 if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 150 return(EINVAL); 151 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 152 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 153 (so->so_options & SO_ACCEPTCONN) == 0)) 154 wild = IN6PLOOKUP_WILDCARD; 155 if (nam) { 156 sin6 = mtod(nam, struct sockaddr_in6 *); 157 if (nam->m_len != sizeof(*sin6)) 158 return(EINVAL); 159 /* 160 * We should check the family, but old programs 161 * incorrectly fail to intialize it. 162 */ 163 if (sin6->sin6_family != AF_INET6) 164 return(EAFNOSUPPORT); 165 166 /* 167 * since we do not check port number duplicate with IPv4 space, 168 * we reject it at this moment. If we leave it, we make normal 169 * user to hijack port number from other users. 170 */ 171 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 172 return(EADDRNOTAVAIL); 173 174 /* 175 * If the scope of the destination is link-local, embed the 176 * interface index in the address. 177 */ 178 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 179 /* XXX boundary check is assumed to be already done. */ 180 /* XXX sin6_scope_id is weaker than advanced-api. */ 181 struct in6_pktinfo *pi; 182 if (in6p->in6p_outputopts && 183 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 184 pi->ipi6_ifindex) { 185 sin6->sin6_addr.s6_addr16[1] 186 = htons(pi->ipi6_ifindex); 187 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 188 && in6p->in6p_moptions 189 && in6p->in6p_moptions->im6o_multicast_ifp) { 190 sin6->sin6_addr.s6_addr16[1] = 191 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 192 } else if (sin6->sin6_scope_id) { 193 /* boundary check */ 194 if (sin6->sin6_scope_id < 0 195 || if_index < sin6->sin6_scope_id) { 196 return ENXIO; /* XXX EINVAL? */ 197 } 198 sin6->sin6_addr.s6_addr16[1] 199 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 200 /* this must be cleared for ifa_ifwithaddr() */ 201 sin6->sin6_scope_id = 0; 202 } 203 } 204 205 lport = sin6->sin6_port; 206 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 207 /* 208 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 209 * allow compepte duplication of binding if 210 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 211 * and a multicast address is bound on both 212 * new and duplicated sockets. 213 */ 214 if (so->so_options & SO_REUSEADDR) 215 reuseport = SO_REUSEADDR|SO_REUSEPORT; 216 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 217 struct sockaddr_in sin; 218 219 bzero(&sin, sizeof(sin)); 220 sin.sin_len = sizeof(sin); 221 sin.sin_family = AF_INET; 222 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 223 sizeof(sin.sin_addr)); 224 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 225 return EADDRNOTAVAIL; 226 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 227 struct ifaddr *ia = NULL; 228 229 sin6->sin6_port = 0; /* yech... */ 230 #if defined(NFAITH) && NFAITH > 0 231 if ((in6p->in6p_flags & IN6P_FAITH) == 0 232 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 233 #else 234 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 235 #endif 236 return(EADDRNOTAVAIL); 237 238 /* 239 * XXX: bind to an anycast address might accidentally 240 * cause sending a packet with anycast source address. 241 */ 242 if (ia && 243 ((struct in6_ifaddr *)ia)->ia6_flags & 244 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 245 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 246 return(EADDRNOTAVAIL); 247 } 248 } 249 if (lport) { 250 #ifndef IPNOPRIVPORTS 251 /* GROSS */ 252 if (ntohs(lport) < IPV6PORT_RESERVED && 253 (p == 0 || 254 (error = suser(p->p_ucred, &p->p_acflag)))) 255 return(EACCES); 256 #endif 257 258 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 259 /* should check this but we can't ... */ 260 #if 0 261 struct inpcb *t; 262 263 t = in_pcblookup_bind(&tcbtable, 264 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 265 lport); 266 if (t && (reuseport & t->inp_socket->so_options) == 0) 267 return EADDRINUSE; 268 #endif 269 } else { 270 struct in6pcb *t; 271 272 t = in6_pcblookup(head, &zeroin6_addr, 0, 273 &sin6->sin6_addr, lport, wild); 274 if (t && (reuseport & t->in6p_socket->so_options) == 0) 275 return(EADDRINUSE); 276 } 277 } 278 in6p->in6p_laddr = sin6->sin6_addr; 279 } 280 281 if (lport == 0) { 282 int e; 283 if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p)) != 0) 284 return(e); 285 } 286 else 287 in6p->in6p_lport = lport; 288 289 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 290 return(0); 291 } 292 293 /* 294 * Connect from a socket to a specified address. 295 * Both address and port must be specified in argument sin6. 296 * If don't have a local address for this socket yet, 297 * then pick one. 298 */ 299 int 300 in6_pcbconnect(in6p, nam) 301 struct in6pcb *in6p; 302 struct mbuf *nam; 303 { 304 struct in6_addr *in6a = NULL; 305 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 306 struct in6_pktinfo *pi; 307 struct ifnet *ifp = NULL; /* outgoing interface */ 308 int error = 0; 309 struct in6_addr mapped; 310 struct sockaddr_in6 tmp; 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 /* protect *sin6 from overwrites */ 333 tmp = *sin6; 334 sin6 = &tmp; 335 336 /* 337 * If the scope of the destination is link-local, embed the interface 338 * index in the address. 339 */ 340 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 341 /* XXX boundary check is assumed to be already done. */ 342 /* XXX sin6_scope_id is weaker than advanced-api. */ 343 if (in6p->in6p_outputopts && 344 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 345 pi->ipi6_ifindex) { 346 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 347 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 348 } 349 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 350 in6p->in6p_moptions && 351 in6p->in6p_moptions->im6o_multicast_ifp) { 352 sin6->sin6_addr.s6_addr16[1] = 353 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 354 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 355 } else if (sin6->sin6_scope_id) { 356 /* boundary check */ 357 if (sin6->sin6_scope_id < 0 358 || if_index < sin6->sin6_scope_id) { 359 return ENXIO; /* XXX EINVAL? */ 360 } 361 sin6->sin6_addr.s6_addr16[1] 362 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 363 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 364 } 365 } 366 367 /* Source address selection. */ 368 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 369 && in6p->in6p_laddr.s6_addr32[3] == 0) { 370 struct sockaddr_in sin, *sinp; 371 372 bzero(&sin, sizeof(sin)); 373 sin.sin_len = sizeof(sin); 374 sin.sin_family = AF_INET; 375 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 376 sizeof(sin.sin_addr)); 377 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 378 in6p->in6p_socket->so_options, NULL, &error); 379 if (sinp == 0) { 380 if (error == 0) 381 error = EADDRNOTAVAIL; 382 return(error); 383 } 384 bzero(&mapped, sizeof(mapped)); 385 mapped.s6_addr16[5] = htons(0xffff); 386 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 387 in6a = &mapped; 388 } else { 389 /* 390 * XXX: in6_selectsrc might replace the bound local address 391 * with the address specified by setsockopt(IPV6_PKTINFO). 392 * Is it the intended behavior? 393 */ 394 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 395 in6p->in6p_moptions, 396 &in6p->in6p_route, 397 &in6p->in6p_laddr, &error); 398 if (in6a == 0) { 399 if (error == 0) 400 error = EADDRNOTAVAIL; 401 return(error); 402 } 403 } 404 if (in6p->in6p_route.ro_rt) 405 ifp = in6p->in6p_route.ro_rt->rt_ifp; 406 407 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 408 409 if (in6_pcblookup(in6p->in6p_head, 410 &sin6->sin6_addr, 411 sin6->sin6_port, 412 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? 413 in6a : &in6p->in6p_laddr, 414 in6p->in6p_lport, 415 0)) 416 return(EADDRINUSE); 417 if (IN6_IS_ADDR_UNSPECIFIED(&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 (struct proc *)0); 423 in6p->in6p_laddr = *in6a; 424 } 425 in6p->in6p_faddr = sin6->sin6_addr; 426 in6p->in6p_fport = sin6->sin6_port; 427 /* 428 * xxx kazu flowlabel is necessary for connect? 429 * but if this line is missing, the garbage value remains. 430 */ 431 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 432 return(0); 433 } 434 435 void 436 in6_pcbdisconnect(in6p) 437 struct in6pcb *in6p; 438 { 439 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 440 in6p->in6p_fport = 0; 441 if (in6p->in6p_socket->so_state & SS_NOFDREF) 442 in6_pcbdetach(in6p); 443 } 444 445 void 446 in6_pcbdetach(in6p) 447 struct in6pcb *in6p; 448 { 449 struct socket *so = in6p->in6p_socket; 450 451 #ifdef IPSEC 452 ipsec6_delete_pcbpolicy(in6p); 453 #endif /* IPSEC */ 454 sotoin6pcb(so) = 0; 455 sofree(so); 456 if (in6p->in6p_options) 457 m_freem(in6p->in6p_options); 458 if (in6p->in6p_outputopts) { 459 if (in6p->in6p_outputopts->ip6po_rthdr && 460 in6p->in6p_outputopts->ip6po_route.ro_rt) 461 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 462 if (in6p->in6p_outputopts->ip6po_m) 463 (void)m_free(in6p->in6p_outputopts->ip6po_m); 464 free(in6p->in6p_outputopts, M_IP6OPT); 465 } 466 if (in6p->in6p_route.ro_rt) 467 rtfree(in6p->in6p_route.ro_rt); 468 ip6_freemoptions(in6p->in6p_moptions); 469 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 470 in6p->in6p_prev->in6p_next = in6p->in6p_next; 471 in6p->in6p_prev = NULL; 472 FREE(in6p, M_PCB); 473 } 474 475 void 476 in6_setsockaddr(in6p, nam) 477 struct in6pcb *in6p; 478 struct mbuf *nam; 479 { 480 struct sockaddr_in6 *sin6; 481 482 nam->m_len = sizeof(*sin6); 483 sin6 = mtod(nam, struct sockaddr_in6 *); 484 bzero((caddr_t)sin6, sizeof(*sin6)); 485 sin6->sin6_family = AF_INET6; 486 sin6->sin6_len = sizeof(struct sockaddr_in6); 487 sin6->sin6_port = in6p->in6p_lport; 488 sin6->sin6_addr = in6p->in6p_laddr; 489 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 490 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 491 else 492 sin6->sin6_scope_id = 0; /*XXX*/ 493 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 494 sin6->sin6_addr.s6_addr16[1] = 0; 495 } 496 497 void 498 in6_setpeeraddr(in6p, nam) 499 struct in6pcb *in6p; 500 struct mbuf *nam; 501 { 502 struct sockaddr_in6 *sin6; 503 504 nam->m_len = sizeof(*sin6); 505 sin6 = mtod(nam, struct sockaddr_in6 *); 506 bzero((caddr_t)sin6, sizeof(*sin6)); 507 sin6->sin6_family = AF_INET6; 508 sin6->sin6_len = sizeof(struct sockaddr_in6); 509 sin6->sin6_port = in6p->in6p_fport; 510 sin6->sin6_addr = in6p->in6p_faddr; 511 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 512 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 513 else 514 sin6->sin6_scope_id = 0; /*XXX*/ 515 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 516 sin6->sin6_addr.s6_addr16[1] = 0; 517 } 518 519 /* 520 * Pass some notification to all connections of a protocol 521 * associated with address dst. The local address and/or port numbers 522 * may be specified to limit the search. The "usual action" will be 523 * taken, depending on the ctlinput cmd. The caller must filter any 524 * cmds that are uninteresting (e.g., no error in the map). 525 * Call the protocol specific routine (if any) to report 526 * any errors for each matching socket. 527 * 528 * Must be called at splsoftnet. 529 */ 530 int 531 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 532 struct in6pcb *head; 533 struct sockaddr *dst; 534 u_int fport_arg, lport_arg; 535 struct in6_addr *laddr6; 536 int cmd; 537 void (*notify) __P((struct in6pcb *, int)); 538 { 539 struct in6pcb *in6p, *nin6p; 540 struct in6_addr faddr6; 541 u_int16_t fport = fport_arg, lport = lport_arg; 542 int errno; 543 int nmatch = 0; 544 void (*notify2) __P((struct in6pcb *, int)); 545 546 notify2 = NULL; 547 548 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 549 return 0; 550 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 551 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) 552 return 0; 553 554 /* 555 * Redirects go to all references to the destination, 556 * and use in6_rtchange to invalidate the route cache. 557 * Dead host indications: also use in6_rtchange to invalidate 558 * the cache, and deliver the error to all the sockets. 559 * Otherwise, if we have knowledge of the local port and address, 560 * deliver only to that socket. 561 */ 562 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 563 fport = 0; 564 lport = 0; 565 bzero((caddr_t)laddr6, sizeof(*laddr6)); 566 567 /* 568 * Keep the old notify function to store a soft error 569 * in each PCB. 570 */ 571 if (cmd == PRC_HOSTDEAD && notify != in6_rtchange) 572 notify2 = notify; 573 574 notify = in6_rtchange; 575 } 576 577 if (notify == NULL) 578 return 0; 579 580 errno = inet6ctlerrmap[cmd]; 581 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 582 nin6p = in6p->in6p_next; 583 584 if (notify == in6_rtchange) { 585 /* 586 * Since a non-connected PCB might have a cached route, 587 * we always call in6_rtchange without matching 588 * the PCB to the src/dst pair. 589 * 590 * XXX: we assume in6_rtchange does not free the PCB. 591 */ 592 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr, 593 &faddr6)) 594 in6_rtchange(in6p, errno); 595 596 if (notify2 == NULL) 597 continue; 598 599 notify = notify2; 600 } 601 602 /* at this point, we can assume that NOTIFY is not NULL. */ 603 604 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) || 605 in6p->in6p_socket == 0 || 606 (lport && in6p->in6p_lport != lport) || 607 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && 608 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 609 (fport && in6p->in6p_fport != fport)) 610 continue; 611 612 (*notify)(in6p, errno); 613 nmatch++; 614 } 615 return nmatch; 616 } 617 618 void 619 in6_pcbpurgeif(head, ifp) 620 struct in6pcb *head; 621 struct ifnet *ifp; 622 { 623 struct in6pcb *in6p, *nin6p; 624 625 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 626 nin6p = in6p->in6p_next; 627 if (in6p->in6p_route.ro_rt != NULL && 628 in6p->in6p_route.ro_rt->rt_ifp == ifp) 629 in6_rtchange(in6p, 0); 630 } 631 } 632 633 /* 634 * Check for alternatives when higher level complains 635 * about service problems. For now, invalidate cached 636 * routing information. If the route was created dynamically 637 * (by a redirect), time to try a default gateway again. 638 */ 639 void 640 in6_losing(in6p) 641 struct in6pcb *in6p; 642 { 643 struct rtentry *rt; 644 struct rt_addrinfo info; 645 646 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 647 in6p->in6p_route.ro_rt = 0; 648 bzero((caddr_t)&info, sizeof(info)); 649 info.rti_info[RTAX_DST] = 650 (struct sockaddr *)&in6p->in6p_route.ro_dst; 651 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 652 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 653 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 654 if (rt->rt_flags & RTF_DYNAMIC) 655 (void)rtrequest(RTM_DELETE, rt_key(rt), 656 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 657 (struct rtentry **)0); 658 else 659 /* 660 * A new route can be allocated 661 * the next time output is attempted. 662 */ 663 rtfree(rt); 664 } 665 } 666 667 /* 668 * After a routing change, flush old routing 669 * and allocate a (hopefully) better one. 670 */ 671 void 672 in6_rtchange(in6p, errno) 673 struct in6pcb *in6p; 674 int errno; 675 { 676 if (in6p->in6p_route.ro_rt) { 677 rtfree(in6p->in6p_route.ro_rt); 678 in6p->in6p_route.ro_rt = 0; 679 /* 680 * A new route can be allocated the next time 681 * output is attempted. 682 */ 683 } 684 } 685 686 struct in6pcb * 687 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 688 struct in6pcb *head; 689 struct in6_addr *faddr6, *laddr6; 690 u_int fport_arg, lport_arg; 691 int flags; 692 { 693 struct in6pcb *in6p, *match = 0; 694 int matchwild = 3, wildcard; 695 u_int16_t fport = fport_arg, lport = lport_arg; 696 697 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 698 if (in6p->in6p_lport != lport) 699 continue; 700 wildcard = 0; 701 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 702 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 703 wildcard++; 704 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 705 continue; 706 } 707 #ifndef TCP6 708 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 709 && in6p->in6p_laddr.s6_addr32[3] == 0) { 710 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 711 continue; 712 if (laddr6->s6_addr32[3] == 0) 713 ; 714 else 715 wildcard++; 716 } 717 #endif 718 else { 719 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 720 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 721 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 722 continue; 723 else 724 wildcard++; 725 #else 726 continue; 727 #endif 728 } else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 729 wildcard++; 730 } 731 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 732 if (IN6_IS_ADDR_UNSPECIFIED(faddr6)) 733 wildcard++; 734 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 735 || in6p->in6p_fport != fport) 736 continue; 737 } 738 #ifndef TCP6 739 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) 740 && in6p->in6p_faddr.s6_addr32[3] == 0) { 741 if (!IN6_IS_ADDR_V4MAPPED(faddr6)) 742 continue; 743 if (faddr6->s6_addr32[3] == 0) 744 ; 745 else 746 wildcard++; 747 } 748 #endif 749 else { 750 if (IN6_IS_ADDR_V4MAPPED(faddr6)) { 751 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 752 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 753 continue; 754 else 755 wildcard++; 756 #else 757 continue; 758 #endif 759 } else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6)) 760 wildcard++; 761 } 762 763 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 764 continue; 765 if (wildcard < matchwild) { 766 match = in6p; 767 matchwild = wildcard; 768 if (matchwild == 0) 769 break; 770 } 771 } 772 return(match); 773 } 774 775 #ifndef TCP6 776 struct rtentry * 777 in6_pcbrtentry(in6p) 778 struct in6pcb *in6p; 779 { 780 struct route_in6 *ro; 781 782 ro = &in6p->in6p_route; 783 784 if (ro->ro_rt == NULL) { 785 /* 786 * No route yet, so try to acquire one. 787 */ 788 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 789 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 790 ro->ro_dst.sin6_family = AF_INET6; 791 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 792 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 793 rtalloc((struct route *)ro); 794 } 795 } 796 return (ro->ro_rt); 797 } 798 799 struct in6pcb * 800 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 801 struct in6pcb *head; 802 struct in6_addr *faddr6, *laddr6; 803 u_int fport_arg, lport_arg; 804 int faith; 805 { 806 struct in6pcb *in6p; 807 u_int16_t fport = fport_arg, lport = lport_arg; 808 809 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 810 #if defined(NFAITH) && NFAITH > 0 811 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 812 continue; 813 #endif 814 /* find exact match on both source and dest */ 815 if (in6p->in6p_fport != fport) 816 continue; 817 if (in6p->in6p_lport != lport) 818 continue; 819 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 820 continue; 821 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 822 continue; 823 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 824 continue; 825 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 826 continue; 827 return in6p; 828 } 829 return NULL; 830 } 831 832 struct in6pcb * 833 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 834 struct in6pcb *head; 835 struct in6_addr *laddr6; 836 u_int lport_arg; 837 int faith; 838 { 839 struct in6pcb *in6p, *match; 840 u_int16_t lport = lport_arg; 841 842 match = NULL; 843 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 844 /* 845 * find destination match. exact match is preferred 846 * against wildcard match. 847 */ 848 #if defined(NFAITH) && NFAITH > 0 849 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 850 continue; 851 #endif 852 if (in6p->in6p_fport != 0) 853 continue; 854 if (in6p->in6p_lport != lport) 855 continue; 856 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 857 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 858 #ifndef INET6_BINDV6ONLY 859 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 860 continue; 861 else 862 match = in6p; 863 #else 864 continue; 865 #endif 866 } else 867 match = in6p; 868 } 869 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 870 in6p->in6p_laddr.s6_addr32[3] == 0) { 871 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 872 laddr6->s6_addr32[3] != 0) 873 match = in6p; 874 } 875 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 876 return in6p; 877 } 878 return match; 879 } 880 #endif 881
Indexes created Mon Sep 22 13:09:51 GMT 2025