in6_pcb.c revision 1.26.2.2
1 /* $NetBSD: in6_pcb.c,v 1.26.2.2 2000/08/27 01:25:08 itojun Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.63 2000/08/26 10:00:45 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 ip6_anonportmin = IPV6PORT_ANONMIN; 108 int ip6_anonportmax = IPV6PORT_ANONMAX; 109 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 110 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 111 112 int 113 in6_pcballoc(so, head) 114 struct socket *so; 115 struct in6pcb *head; 116 { 117 struct in6pcb *in6p; 118 119 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 120 if (in6p == NULL) 121 return(ENOBUFS); 122 bzero((caddr_t)in6p, sizeof(*in6p)); 123 in6p->in6p_head = head; 124 in6p->in6p_socket = so; 125 in6p->in6p_hops = -1; /* use kernel default */ 126 in6p->in6p_icmp6filt = NULL; 127 in6p->in6p_next = head->in6p_next; 128 head->in6p_next = in6p; 129 in6p->in6p_prev = head; 130 in6p->in6p_next->in6p_prev = in6p; 131 #ifndef INET6_BINDV6ONLY 132 if (ip6_bindv6only) 133 in6p->in6p_flags |= IN6P_BINDV6ONLY; 134 #else 135 in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/ 136 #endif 137 so->so_pcb = (caddr_t)in6p; 138 return(0); 139 } 140 141 int 142 in6_pcbbind(in6p, nam, p) 143 register struct in6pcb *in6p; 144 struct mbuf *nam; 145 struct proc *p; 146 { 147 struct socket *so = in6p->in6p_socket; 148 struct in6pcb *head = in6p->in6p_head; 149 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 150 u_int16_t lport = 0; 151 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 152 int error; 153 154 if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 155 return(EINVAL); 156 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 157 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 158 (so->so_options & SO_ACCEPTCONN) == 0)) 159 wild = IN6PLOOKUP_WILDCARD; 160 if (nam) { 161 sin6 = mtod(nam, struct sockaddr_in6 *); 162 if (nam->m_len != sizeof(*sin6)) 163 return(EINVAL); 164 /* 165 * We should check the family, but old programs 166 * incorrectly fail to intialize it. 167 */ 168 if (sin6->sin6_family != AF_INET6) 169 return(EAFNOSUPPORT); 170 171 /* 172 * since we do not check port number duplicate with IPv4 space, 173 * we reject it at this moment. If we leave it, we make normal 174 * user to hijack port number from other users. 175 */ 176 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 177 return(EADDRNOTAVAIL); 178 179 /* 180 * If the scope of the destination is link-local, embed the 181 * interface index in the address. 182 */ 183 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 184 /* XXX boundary check is assumed to be already done. */ 185 /* XXX sin6_scope_id is weaker than advanced-api. */ 186 struct in6_pktinfo *pi; 187 if (in6p->in6p_outputopts && 188 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 189 pi->ipi6_ifindex) { 190 sin6->sin6_addr.s6_addr16[1] 191 = htons(pi->ipi6_ifindex); 192 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 193 && in6p->in6p_moptions 194 && in6p->in6p_moptions->im6o_multicast_ifp) { 195 sin6->sin6_addr.s6_addr16[1] = 196 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 197 } else if (sin6->sin6_scope_id) { 198 /* boundary check */ 199 if (sin6->sin6_scope_id < 0 200 || if_index < sin6->sin6_scope_id) { 201 return ENXIO; /* XXX EINVAL? */ 202 } 203 sin6->sin6_addr.s6_addr16[1] 204 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 205 /* this must be cleared for ifa_ifwithaddr() */ 206 sin6->sin6_scope_id = 0; 207 } 208 } 209 210 lport = sin6->sin6_port; 211 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 212 /* 213 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 214 * allow compepte duplication of binding if 215 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 216 * and a multicast address is bound on both 217 * new and duplicated sockets. 218 */ 219 if (so->so_options & SO_REUSEADDR) 220 reuseport = SO_REUSEADDR|SO_REUSEPORT; 221 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 222 struct sockaddr_in sin; 223 224 bzero(&sin, sizeof(sin)); 225 sin.sin_len = sizeof(sin); 226 sin.sin_family = AF_INET; 227 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 228 sizeof(sin.sin_addr)); 229 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 230 return EADDRNOTAVAIL; 231 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 232 struct ifaddr *ia = NULL; 233 234 sin6->sin6_port = 0; /* yech... */ 235 #if defined(NFAITH) && NFAITH > 0 236 if ((in6p->in6p_flags & IN6P_FAITH) == 0 237 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 238 #else 239 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 240 #endif 241 return(EADDRNOTAVAIL); 242 243 /* 244 * XXX: bind to an anycast address might accidentally 245 * cause sending a packet with anycast source address. 246 */ 247 if (ia && 248 ((struct in6_ifaddr *)ia)->ia6_flags & 249 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 250 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 251 return(EADDRNOTAVAIL); 252 } 253 } 254 if (lport) { 255 #ifndef IPNOPRIVPORTS 256 /* GROSS */ 257 if (ntohs(lport) < IPV6PORT_RESERVED && 258 (p == 0 || 259 (error = suser(p->p_ucred, &p->p_acflag)))) 260 return(EACCES); 261 #endif 262 263 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 264 /* should check this but we can't ... */ 265 #if 0 266 struct inpcb *t; 267 268 t = in_pcblookup_bind(&tcbtable, 269 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 270 lport); 271 if (t && (reuseport & t->inp_socket->so_options) == 0) 272 return EADDRINUSE; 273 #endif 274 } else { 275 struct in6pcb *t; 276 277 t = in6_pcblookup(head, &zeroin6_addr, 0, 278 &sin6->sin6_addr, lport, wild); 279 if (t && (reuseport & t->in6p_socket->so_options) == 0) 280 return(EADDRINUSE); 281 } 282 } 283 in6p->in6p_laddr = sin6->sin6_addr; 284 } 285 286 if (lport == 0) { 287 int e; 288 if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p)) != 0) 289 return(e); 290 } 291 else 292 in6p->in6p_lport = lport; 293 294 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 295 return(0); 296 } 297 298 /* 299 * Connect from a socket to a specified address. 300 * Both address and port must be specified in argument sin6. 301 * If don't have a local address for this socket yet, 302 * then pick one. 303 */ 304 int 305 in6_pcbconnect(in6p, nam) 306 struct in6pcb *in6p; 307 struct mbuf *nam; 308 { 309 struct in6_addr *in6a = NULL; 310 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 311 struct in6_pktinfo *pi; 312 struct ifnet *ifp = NULL; /* outgoing interface */ 313 int error = 0; 314 struct in6_addr mapped; 315 struct sockaddr_in6 tmp; 316 317 (void)&in6a; /* XXX fool gcc */ 318 319 if (nam->m_len != sizeof(*sin6)) 320 return(EINVAL); 321 if (sin6->sin6_family != AF_INET6) 322 return(EAFNOSUPPORT); 323 if (sin6->sin6_port == 0) 324 return(EADDRNOTAVAIL); 325 326 /* sanity check for mapped address case */ 327 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 328 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 329 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 330 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 331 return EINVAL; 332 } else { 333 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 334 return EINVAL; 335 } 336 337 /* protect *sin6 from overwrites */ 338 tmp = *sin6; 339 sin6 = &tmp; 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 { 394 /* 395 * XXX: in6_selectsrc might replace the bound local address 396 * with the address specified by setsockopt(IPV6_PKTINFO). 397 * Is it the intended behavior? 398 */ 399 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 400 in6p->in6p_moptions, 401 &in6p->in6p_route, 402 &in6p->in6p_laddr, &error); 403 if (in6a == 0) { 404 if (error == 0) 405 error = EADDRNOTAVAIL; 406 return(error); 407 } 408 } 409 if (in6p->in6p_route.ro_rt) 410 ifp = in6p->in6p_route.ro_rt->rt_ifp; 411 412 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 413 414 if (in6_pcblookup(in6p->in6p_head, 415 &sin6->sin6_addr, 416 sin6->sin6_port, 417 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? 418 in6a : &in6p->in6p_laddr, 419 in6p->in6p_lport, 420 0)) 421 return(EADDRINUSE); 422 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) 423 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 424 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 425 if (in6p->in6p_lport == 0) 426 (void)in6_pcbbind(in6p, (struct mbuf *)0, 427 (struct proc *)0); 428 in6p->in6p_laddr = *in6a; 429 } 430 in6p->in6p_faddr = sin6->sin6_addr; 431 in6p->in6p_fport = sin6->sin6_port; 432 /* 433 * xxx kazu flowlabel is necessary for connect? 434 * but if this line is missing, the garbage value remains. 435 */ 436 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 437 return(0); 438 } 439 440 void 441 in6_pcbdisconnect(in6p) 442 struct in6pcb *in6p; 443 { 444 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 445 in6p->in6p_fport = 0; 446 if (in6p->in6p_socket->so_state & SS_NOFDREF) 447 in6_pcbdetach(in6p); 448 } 449 450 void 451 in6_pcbdetach(in6p) 452 struct in6pcb *in6p; 453 { 454 struct socket *so = in6p->in6p_socket; 455 456 #ifdef IPSEC 457 ipsec6_delete_pcbpolicy(in6p); 458 #endif /* IPSEC */ 459 sotoin6pcb(so) = 0; 460 sofree(so); 461 if (in6p->in6p_options) 462 m_freem(in6p->in6p_options); 463 if (in6p->in6p_outputopts) { 464 if (in6p->in6p_outputopts->ip6po_rthdr && 465 in6p->in6p_outputopts->ip6po_route.ro_rt) 466 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 467 if (in6p->in6p_outputopts->ip6po_m) 468 (void)m_free(in6p->in6p_outputopts->ip6po_m); 469 free(in6p->in6p_outputopts, M_IP6OPT); 470 } 471 if (in6p->in6p_route.ro_rt) 472 rtfree(in6p->in6p_route.ro_rt); 473 ip6_freemoptions(in6p->in6p_moptions); 474 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 475 in6p->in6p_prev->in6p_next = in6p->in6p_next; 476 in6p->in6p_prev = NULL; 477 FREE(in6p, M_PCB); 478 } 479 480 void 481 in6_setsockaddr(in6p, nam) 482 struct in6pcb *in6p; 483 struct mbuf *nam; 484 { 485 struct sockaddr_in6 *sin6; 486 487 nam->m_len = sizeof(*sin6); 488 sin6 = mtod(nam, struct sockaddr_in6 *); 489 bzero((caddr_t)sin6, sizeof(*sin6)); 490 sin6->sin6_family = AF_INET6; 491 sin6->sin6_len = sizeof(struct sockaddr_in6); 492 sin6->sin6_port = in6p->in6p_lport; 493 sin6->sin6_addr = in6p->in6p_laddr; 494 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 495 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 496 else 497 sin6->sin6_scope_id = 0; /*XXX*/ 498 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 499 sin6->sin6_addr.s6_addr16[1] = 0; 500 } 501 502 void 503 in6_setpeeraddr(in6p, nam) 504 struct in6pcb *in6p; 505 struct mbuf *nam; 506 { 507 struct sockaddr_in6 *sin6; 508 509 nam->m_len = sizeof(*sin6); 510 sin6 = mtod(nam, struct sockaddr_in6 *); 511 bzero((caddr_t)sin6, sizeof(*sin6)); 512 sin6->sin6_family = AF_INET6; 513 sin6->sin6_len = sizeof(struct sockaddr_in6); 514 sin6->sin6_port = in6p->in6p_fport; 515 sin6->sin6_addr = in6p->in6p_faddr; 516 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 517 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 518 else 519 sin6->sin6_scope_id = 0; /*XXX*/ 520 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 521 sin6->sin6_addr.s6_addr16[1] = 0; 522 } 523 524 /* 525 * Pass some notification to all connections of a protocol 526 * associated with address dst. The local address and/or port numbers 527 * may be specified to limit the search. The "usual action" will be 528 * taken, depending on the ctlinput cmd. The caller must filter any 529 * cmds that are uninteresting (e.g., no error in the map). 530 * Call the protocol specific routine (if any) to report 531 * any errors for each matching socket. 532 * 533 * Must be called at splsoftnet. 534 */ 535 int 536 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 537 struct in6pcb *head; 538 struct sockaddr *dst; 539 u_int fport_arg, lport_arg; 540 struct in6_addr *laddr6; 541 int cmd; 542 void (*notify) __P((struct in6pcb *, int)); 543 { 544 struct in6pcb *in6p, *nin6p; 545 struct in6_addr faddr6; 546 u_int16_t fport = fport_arg, lport = lport_arg; 547 int errno; 548 int nmatch = 0; 549 void (*notify2) __P((struct in6pcb *, int)); 550 551 notify2 = NULL; 552 553 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 554 return 0; 555 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 556 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) 557 return 0; 558 559 /* 560 * Redirects go to all references to the destination, 561 * and use in6_rtchange to invalidate the route cache. 562 * Dead host indications: also use in6_rtchange to invalidate 563 * the cache, and deliver the error to all the sockets. 564 * Otherwise, if we have knowledge of the local port and address, 565 * deliver only to that socket. 566 */ 567 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 568 fport = 0; 569 lport = 0; 570 bzero((caddr_t)laddr6, sizeof(*laddr6)); 571 572 /* 573 * Keep the old notify function to store a soft error 574 * in each PCB. 575 */ 576 if (cmd == PRC_HOSTDEAD && notify != in6_rtchange) 577 notify2 = notify; 578 579 notify = in6_rtchange; 580 } 581 582 if (notify == NULL) 583 return 0; 584 585 errno = inet6ctlerrmap[cmd]; 586 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 587 nin6p = in6p->in6p_next; 588 589 if (notify == in6_rtchange) { 590 /* 591 * Since a non-connected PCB might have a cached route, 592 * we always call in6_rtchange without matching 593 * the PCB to the src/dst pair. 594 * 595 * XXX: we assume in6_rtchange does not free the PCB. 596 */ 597 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr, 598 &faddr6)) 599 in6_rtchange(in6p, errno); 600 601 if (notify2 == NULL) 602 continue; 603 604 notify = notify2; 605 } 606 607 /* at this point, we can assume that NOTIFY is not NULL. */ 608 609 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) || 610 in6p->in6p_socket == 0 || 611 (lport && in6p->in6p_lport != lport) || 612 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && 613 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 614 (fport && in6p->in6p_fport != fport)) 615 continue; 616 617 (*notify)(in6p, errno); 618 nmatch++; 619 } 620 return nmatch; 621 } 622 623 void 624 in6_pcbpurgeif(head, ifp) 625 struct in6pcb *head; 626 struct ifnet *ifp; 627 { 628 struct in6pcb *in6p, *nin6p; 629 630 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 631 nin6p = in6p->in6p_next; 632 if (in6p->in6p_route.ro_rt != NULL && 633 in6p->in6p_route.ro_rt->rt_ifp == ifp) 634 in6_rtchange(in6p, 0); 635 } 636 } 637 638 /* 639 * Check for alternatives when higher level complains 640 * about service problems. For now, invalidate cached 641 * routing information. If the route was created dynamically 642 * (by a redirect), time to try a default gateway again. 643 */ 644 void 645 in6_losing(in6p) 646 struct in6pcb *in6p; 647 { 648 struct rtentry *rt; 649 struct rt_addrinfo info; 650 651 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 652 in6p->in6p_route.ro_rt = 0; 653 bzero((caddr_t)&info, sizeof(info)); 654 info.rti_info[RTAX_DST] = 655 (struct sockaddr *)&in6p->in6p_route.ro_dst; 656 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 657 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 658 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 659 if (rt->rt_flags & RTF_DYNAMIC) 660 (void)rtrequest(RTM_DELETE, rt_key(rt), 661 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 662 (struct rtentry **)0); 663 else 664 /* 665 * A new route can be allocated 666 * the next time output is attempted. 667 */ 668 rtfree(rt); 669 } 670 } 671 672 /* 673 * After a routing change, flush old routing 674 * and allocate a (hopefully) better one. 675 */ 676 void 677 in6_rtchange(in6p, errno) 678 struct in6pcb *in6p; 679 int errno; 680 { 681 if (in6p->in6p_route.ro_rt) { 682 rtfree(in6p->in6p_route.ro_rt); 683 in6p->in6p_route.ro_rt = 0; 684 /* 685 * A new route can be allocated the next time 686 * output is attempted. 687 */ 688 } 689 } 690 691 struct in6pcb * 692 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 693 struct in6pcb *head; 694 struct in6_addr *faddr6, *laddr6; 695 u_int fport_arg, lport_arg; 696 int flags; 697 { 698 struct in6pcb *in6p, *match = 0; 699 int matchwild = 3, wildcard; 700 u_int16_t fport = fport_arg, lport = lport_arg; 701 702 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 703 if (in6p->in6p_lport != lport) 704 continue; 705 wildcard = 0; 706 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 707 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 708 wildcard++; 709 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 710 continue; 711 } 712 #ifndef TCP6 713 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 714 && in6p->in6p_laddr.s6_addr32[3] == 0) { 715 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 716 continue; 717 if (laddr6->s6_addr32[3] == 0) 718 ; 719 else 720 wildcard++; 721 } 722 #endif 723 else { 724 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 725 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 726 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 727 continue; 728 else 729 wildcard++; 730 #else 731 continue; 732 #endif 733 } else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 734 wildcard++; 735 } 736 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 737 if (IN6_IS_ADDR_UNSPECIFIED(faddr6)) 738 wildcard++; 739 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 740 || in6p->in6p_fport != fport) 741 continue; 742 } 743 #ifndef TCP6 744 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) 745 && in6p->in6p_faddr.s6_addr32[3] == 0) { 746 if (!IN6_IS_ADDR_V4MAPPED(faddr6)) 747 continue; 748 if (faddr6->s6_addr32[3] == 0) 749 ; 750 else 751 wildcard++; 752 } 753 #endif 754 else { 755 if (IN6_IS_ADDR_V4MAPPED(faddr6)) { 756 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 757 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 758 continue; 759 else 760 wildcard++; 761 #else 762 continue; 763 #endif 764 } else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6)) 765 wildcard++; 766 } 767 768 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 769 continue; 770 if (wildcard < matchwild) { 771 match = in6p; 772 matchwild = wildcard; 773 if (matchwild == 0) 774 break; 775 } 776 } 777 return(match); 778 } 779 780 #ifndef TCP6 781 struct rtentry * 782 in6_pcbrtentry(in6p) 783 struct in6pcb *in6p; 784 { 785 struct route_in6 *ro; 786 787 ro = &in6p->in6p_route; 788 789 if (ro->ro_rt == NULL) { 790 /* 791 * No route yet, so try to acquire one. 792 */ 793 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 794 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 795 ro->ro_dst.sin6_family = AF_INET6; 796 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 797 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 798 rtalloc((struct route *)ro); 799 } 800 } 801 return (ro->ro_rt); 802 } 803 804 struct in6pcb * 805 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 806 struct in6pcb *head; 807 struct in6_addr *faddr6, *laddr6; 808 u_int fport_arg, lport_arg; 809 int faith; 810 { 811 struct in6pcb *in6p; 812 u_int16_t fport = fport_arg, lport = lport_arg; 813 814 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 815 /* find exact match on both source and dest */ 816 if (in6p->in6p_fport != fport) 817 continue; 818 if (in6p->in6p_lport != lport) 819 continue; 820 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 821 continue; 822 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 823 continue; 824 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 825 continue; 826 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 827 continue; 828 return in6p; 829 } 830 return NULL; 831 } 832 833 struct in6pcb * 834 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 835 struct in6pcb *head; 836 struct in6_addr *laddr6; 837 u_int lport_arg; 838 int faith; 839 { 840 struct in6pcb *in6p, *match; 841 u_int16_t lport = lport_arg; 842 843 match = NULL; 844 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 845 /* 846 * find destination match. exact match is preferred 847 * against wildcard match. 848 */ 849 #if defined(NFAITH) && NFAITH > 0 850 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 851 continue; 852 #endif 853 if (in6p->in6p_fport != 0) 854 continue; 855 if (in6p->in6p_lport != lport) 856 continue; 857 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 858 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 859 #ifndef INET6_BINDV6ONLY 860 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 861 continue; 862 else 863 match = in6p; 864 #else 865 continue; 866 #endif 867 } else 868 match = in6p; 869 } 870 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 871 in6p->in6p_laddr.s6_addr32[3] == 0) { 872 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 873 laddr6->s6_addr32[3] != 0) 874 match = in6p; 875 } 876 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 877 return in6p; 878 } 879 return match; 880 } 881 #endif 882
Indexes created Wed Oct 15 16:09:53 GMT 2025