raw_ip6.c revision 1.94
1 /* $NetBSD: raw_ip6.c,v 1.94 2008/04/15 03:57:04 thorpej Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei 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, 1988, 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. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.94 2008/04/15 03:57:04 thorpej Exp $"); 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/sysctl.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/socketvar.h> 76 #include <sys/errno.h> 77 #include <sys/systm.h> 78 #include <sys/proc.h> 79 #include <sys/kauth.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/if_types.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip6.h> 88 #include <netinet6/ip6_var.h> 89 #include <netinet6/ip6_private.h> 90 #include <netinet6/ip6_mroute.h> 91 #include <netinet/icmp6.h> 92 #include <netinet6/icmp6_private.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/nd6.h> 95 #include <netinet6/ip6protosw.h> 96 #include <netinet6/scope6_var.h> 97 #include <netinet6/raw_ip6.h> 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #endif /* IPSEC */ 102 103 #ifdef FAST_IPSEC 104 #include <netipsec/ipsec.h> 105 #include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */ 106 #include <netipsec/ipsec6.h> 107 #endif 108 109 #include "faith.h" 110 #if defined(NFAITH) && 0 < NFAITH 111 #include <net/if_faith.h> 112 #endif 113 114 extern struct inpcbtable rawcbtable; 115 struct inpcbtable raw6cbtable; 116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 117 118 /* 119 * Raw interface to IP6 protocol. 120 */ 121 122 struct rip6stat rip6stat; 123 124 /* 125 * Initialize raw connection block queue. 126 */ 127 void 128 rip6_init() 129 { 130 131 in6_pcbinit(&raw6cbtable, 1, 1); 132 } 133 134 /* 135 * Setup generic address and protocol structures 136 * for raw_input routine, then pass them along with 137 * mbuf chain. 138 */ 139 int 140 rip6_input(struct mbuf **mp, int *offp, int proto) 141 { 142 struct mbuf *m = *mp; 143 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 144 struct inpcb_hdr *inph; 145 struct in6pcb *in6p; 146 struct in6pcb *last = NULL; 147 struct sockaddr_in6 rip6src; 148 struct mbuf *opts = NULL; 149 150 rip6stat.rip6s_ipackets++; 151 152 #if defined(NFAITH) && 0 < NFAITH 153 if (faithprefix(&ip6->ip6_dst)) { 154 /* send icmp6 host unreach? */ 155 m_freem(m); 156 return IPPROTO_DONE; 157 } 158 #endif 159 160 /* Be proactive about malicious use of IPv4 mapped address */ 161 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 162 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 163 /* XXX stat */ 164 m_freem(m); 165 return IPPROTO_DONE; 166 } 167 168 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 169 if (sa6_recoverscope(&rip6src) != 0) { 170 /* XXX: should be impossible. */ 171 m_freem(m); 172 return IPPROTO_DONE; 173 } 174 175 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 176 in6p = (struct in6pcb *)inph; 177 if (in6p->in6p_af != AF_INET6) 178 continue; 179 if (in6p->in6p_ip6.ip6_nxt && 180 in6p->in6p_ip6.ip6_nxt != proto) 181 continue; 182 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 183 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 184 continue; 185 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 186 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 187 continue; 188 if (in6p->in6p_cksum != -1) { 189 rip6stat.rip6s_isum++; 190 if (in6_cksum(m, proto, *offp, 191 m->m_pkthdr.len - *offp)) { 192 rip6stat.rip6s_badsum++; 193 continue; 194 } 195 } 196 if (last) { 197 struct mbuf *n; 198 199 #ifdef IPSEC 200 /* 201 * Check AH/ESP integrity. 202 */ 203 if (ipsec6_in_reject(m, last)) { 204 ipsec6stat.in_polvio++; 205 /* do not inject data into pcb */ 206 } else 207 #endif /* IPSEC */ 208 #ifdef FAST_IPSEC 209 /* 210 * Check AH/ESP integrity 211 */ 212 if (!ipsec6_in_reject(m,last)) 213 #endif /* FAST_IPSEC */ 214 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 215 if (last->in6p_flags & IN6P_CONTROLOPTS) 216 ip6_savecontrol(last, &opts, ip6, n); 217 /* strip intermediate headers */ 218 m_adj(n, *offp); 219 if (sbappendaddr(&last->in6p_socket->so_rcv, 220 (struct sockaddr *)&rip6src, n, opts) == 0) { 221 /* should notify about lost packet */ 222 m_freem(n); 223 if (opts) 224 m_freem(opts); 225 rip6stat.rip6s_fullsock++; 226 } else 227 sorwakeup(last->in6p_socket); 228 opts = NULL; 229 } 230 } 231 last = in6p; 232 } 233 #ifdef IPSEC 234 /* 235 * Check AH/ESP integrity. 236 */ 237 if (last && ipsec6_in_reject(m, last)) { 238 m_freem(m); 239 ipsec6stat.in_polvio++; 240 IP6_STATDEC(IP6_STAT_DELIVERED); 241 /* do not inject data into pcb */ 242 } else 243 #endif /* IPSEC */ 244 #ifdef FAST_IPSEC 245 if (last && ipsec6_in_reject(m, last)) { 246 m_freem(m); 247 /* 248 * XXX ipsec6_in_reject update stat if there is an error 249 * so we just need to update stats by hand in the case of last is 250 * NULL 251 */ 252 if (!last) 253 ipsec6stat.in_polvio++; 254 IP6_STATDEC(IP6_STAT_DELIVERED); 255 /* do not inject data into pcb */ 256 } else 257 #endif /* FAST_IPSEC */ 258 if (last) { 259 if (last->in6p_flags & IN6P_CONTROLOPTS) 260 ip6_savecontrol(last, &opts, ip6, m); 261 /* strip intermediate headers */ 262 m_adj(m, *offp); 263 if (sbappendaddr(&last->in6p_socket->so_rcv, 264 (struct sockaddr *)&rip6src, m, opts) == 0) { 265 m_freem(m); 266 if (opts) 267 m_freem(opts); 268 rip6stat.rip6s_fullsock++; 269 } else 270 sorwakeup(last->in6p_socket); 271 } else { 272 rip6stat.rip6s_nosock++; 273 if (m->m_flags & M_MCAST) 274 rip6stat.rip6s_nosockmcast++; 275 if (proto == IPPROTO_NONE) 276 m_freem(m); 277 else { 278 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 279 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 280 icmp6_error(m, ICMP6_PARAM_PROB, 281 ICMP6_PARAMPROB_NEXTHEADER, 282 prvnxtp - mtod(m, u_int8_t *)); 283 } 284 IP6_STATDEC(IP6_STAT_DELIVERED); 285 } 286 return IPPROTO_DONE; 287 } 288 289 void 290 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 291 { 292 struct ip6_hdr *ip6; 293 struct ip6ctlparam *ip6cp = NULL; 294 const struct sockaddr_in6 *sa6_src = NULL; 295 void *cmdarg; 296 void (*notify)(struct in6pcb *, int) = in6_rtchange; 297 int nxt; 298 299 if (sa->sa_family != AF_INET6 || 300 sa->sa_len != sizeof(struct sockaddr_in6)) 301 return; 302 303 if ((unsigned)cmd >= PRC_NCMDS) 304 return; 305 if (PRC_IS_REDIRECT(cmd)) 306 notify = in6_rtchange, d = NULL; 307 else if (cmd == PRC_HOSTDEAD) 308 d = NULL; 309 else if (cmd == PRC_MSGSIZE) 310 ; /* special code is present, see below */ 311 else if (inet6ctlerrmap[cmd] == 0) 312 return; 313 314 /* if the parameter is from icmp6, decode it. */ 315 if (d != NULL) { 316 ip6cp = (struct ip6ctlparam *)d; 317 ip6 = ip6cp->ip6c_ip6; 318 cmdarg = ip6cp->ip6c_cmdarg; 319 sa6_src = ip6cp->ip6c_src; 320 nxt = ip6cp->ip6c_nxt; 321 } else { 322 ip6 = NULL; 323 cmdarg = NULL; 324 sa6_src = &sa6_any; 325 nxt = -1; 326 } 327 328 if (ip6 && cmd == PRC_MSGSIZE) { 329 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 330 int valid = 0; 331 struct in6pcb *in6p; 332 333 /* 334 * Check to see if we have a valid raw IPv6 socket 335 * corresponding to the address in the ICMPv6 message 336 * payload, and the protocol (ip6_nxt) meets the socket. 337 * XXX chase extension headers, or pass final nxt value 338 * from icmp6_notify_error() 339 */ 340 in6p = NULL; 341 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 342 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 343 #if 0 344 if (!in6p) { 345 /* 346 * As the use of sendto(2) is fairly popular, 347 * we may want to allow non-connected pcb too. 348 * But it could be too weak against attacks... 349 * We should at least check if the local 350 * address (= s) is really ours. 351 */ 352 in6p = in6_pcblookup_bind(&raw6cbtable, 353 &sa6->sin6_addr, 0, 0); 354 } 355 #endif 356 357 if (in6p && in6p->in6p_ip6.ip6_nxt && 358 in6p->in6p_ip6.ip6_nxt == nxt) 359 valid++; 360 361 /* 362 * Depending on the value of "valid" and routing table 363 * size (mtudisc_{hi,lo}wat), we will: 364 * - recalculate the new MTU and create the 365 * corresponding routing entry, or 366 * - ignore the MTU change notification. 367 */ 368 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 369 370 /* 371 * regardless of if we called icmp6_mtudisc_update(), 372 * we need to call in6_pcbnotify(), to notify path MTU 373 * change to the userland (RFC3542), because some 374 * unconnected sockets may share the same destination 375 * and want to know the path MTU. 376 */ 377 } 378 379 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 380 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 381 } 382 383 /* 384 * Generate IPv6 header and pass packet to ip6_output. 385 * Tack on options user may have setup with control call. 386 */ 387 int 388 rip6_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *dstsock, 389 struct mbuf *control) 390 { 391 struct in6_addr *dst; 392 struct ip6_hdr *ip6; 393 struct in6pcb *in6p; 394 u_int plen = m->m_pkthdr.len; 395 int error = 0; 396 struct ip6_pktopts opt, *optp = NULL; 397 struct ifnet *oifp = NULL; 398 int type, code; /* for ICMPv6 output statistics only */ 399 int priv = 0; 400 int scope_ambiguous = 0; 401 struct in6_addr *in6a; 402 403 in6p = sotoin6pcb(so); 404 405 priv = 0; 406 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 407 KAUTH_GENERIC_ISSUSER, NULL)) 408 priv = 1; 409 410 dst = &dstsock->sin6_addr; 411 if (control) { 412 if ((error = ip6_setpktopts(control, &opt, 413 in6p->in6p_outputopts, 414 priv, so->so_proto->pr_protocol)) != 0) { 415 goto bad; 416 } 417 optp = &opt; 418 } else 419 optp = in6p->in6p_outputopts; 420 421 /* 422 * Check and convert scope zone ID into internal form. 423 * XXX: we may still need to determine the zone later. 424 */ 425 if (!(so->so_state & SS_ISCONNECTED)) { 426 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 427 scope_ambiguous = 1; 428 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 429 goto bad; 430 } 431 432 /* 433 * For an ICMPv6 packet, we should know its type and code 434 * to update statistics. 435 */ 436 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 437 struct icmp6_hdr *icmp6; 438 if (m->m_len < sizeof(struct icmp6_hdr) && 439 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 440 error = ENOBUFS; 441 goto bad; 442 } 443 icmp6 = mtod(m, struct icmp6_hdr *); 444 type = icmp6->icmp6_type; 445 code = icmp6->icmp6_code; 446 } else { 447 type = 0; 448 code = 0; 449 } 450 451 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 452 if (!m) { 453 error = ENOBUFS; 454 goto bad; 455 } 456 ip6 = mtod(m, struct ip6_hdr *); 457 458 /* 459 * Next header might not be ICMP6 but use its pseudo header anyway. 460 */ 461 ip6->ip6_dst = *dst; 462 463 /* 464 * Source address selection. 465 */ 466 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 467 (struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp, 468 &error)) == 0) { 469 if (error == 0) 470 error = EADDRNOTAVAIL; 471 goto bad; 472 } 473 ip6->ip6_src = *in6a; 474 475 if (oifp && scope_ambiguous) { 476 /* 477 * Application should provide a proper zone ID or the use of 478 * default zone IDs should be enabled. Unfortunately, some 479 * applications do not behave as it should, so we need a 480 * workaround. Even if an appropriate ID is not determined 481 * (when it's required), if we can determine the outgoing 482 * interface. determine the zone ID based on the interface. 483 */ 484 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 485 if (error != 0) 486 goto bad; 487 } 488 ip6->ip6_dst = dstsock->sin6_addr; 489 490 /* fill in the rest of the IPv6 header fields */ 491 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 492 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 493 ip6->ip6_vfc |= IPV6_VERSION; 494 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 495 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 496 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 497 498 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 499 in6p->in6p_cksum != -1) { 500 int off; 501 u_int16_t sum; 502 503 /* compute checksum */ 504 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 505 off = offsetof(struct icmp6_hdr, icmp6_cksum); 506 else 507 off = in6p->in6p_cksum; 508 if (plen < off + 1) { 509 error = EINVAL; 510 goto bad; 511 } 512 off += sizeof(struct ip6_hdr); 513 514 sum = 0; 515 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 516 M_DONTWAIT); 517 if (m == NULL) { 518 error = ENOBUFS; 519 goto bad; 520 } 521 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 522 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 523 M_DONTWAIT); 524 if (m == NULL) { 525 error = ENOBUFS; 526 goto bad; 527 } 528 } 529 530 error = ip6_output(m, optp, &in6p->in6p_route, 0, 531 in6p->in6p_moptions, so, &oifp); 532 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 533 if (oifp) 534 icmp6_ifoutstat_inc(oifp, type, code); 535 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 536 } else 537 rip6stat.rip6s_opackets++; 538 539 goto freectl; 540 541 bad: 542 if (m) 543 m_freem(m); 544 545 freectl: 546 if (control) { 547 ip6_clearpktopts(&opt, -1); 548 m_freem(control); 549 } 550 return error; 551 } 552 553 /* 554 * Raw IPv6 socket option processing. 555 */ 556 int 557 rip6_ctloutput(int op, struct socket *so, int level, int optname, 558 struct mbuf **mp) 559 { 560 int error = 0; 561 562 if (level == SOL_SOCKET && optname == SO_NOHEADER) { 563 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 564 if (op == PRCO_GETOPT) { 565 *mp = m_intopt(so, 1); 566 return 0; 567 } else if (*mp == NULL || (*mp)->m_len != sizeof(int)) 568 error = EINVAL; 569 else if (*mtod(*mp, int *) == 0) 570 error = EINVAL; 571 goto free_m; 572 } else if (level != IPPROTO_IPV6) 573 return ip6_ctloutput(op, so, level, optname, mp); 574 575 switch (optname) { 576 case MRT6_INIT: 577 case MRT6_DONE: 578 case MRT6_ADD_MIF: 579 case MRT6_DEL_MIF: 580 case MRT6_ADD_MFC: 581 case MRT6_DEL_MFC: 582 case MRT6_PIM: 583 if (op == PRCO_SETOPT) 584 error = ip6_mrouter_set(optname, so, *mp); 585 else if (op == PRCO_GETOPT) 586 error = ip6_mrouter_get(optname, so, mp); 587 else 588 error = EINVAL; 589 break; 590 case IPV6_CHECKSUM: 591 return ip6_raw_ctloutput(op, so, level, optname, mp); 592 default: 593 return ip6_ctloutput(op, so, level, optname, mp); 594 } 595 free_m: 596 if (op == PRCO_SETOPT && *mp != NULL) 597 m_free(*mp); 598 return error; 599 } 600 601 extern u_long rip6_sendspace; 602 extern u_long rip6_recvspace; 603 604 int 605 rip6_usrreq(struct socket *so, int req, struct mbuf *m, 606 struct mbuf *nam, struct mbuf *control, struct lwp *l) 607 { 608 struct in6pcb *in6p = sotoin6pcb(so); 609 int s; 610 int error = 0; 611 int priv; 612 613 priv = 0; 614 if (l && !kauth_authorize_generic(l->l_cred, 615 KAUTH_GENERIC_ISSUSER, NULL)) 616 priv++; 617 618 if (req == PRU_CONTROL) 619 return in6_control(so, (u_long)m, (void *)nam, 620 (struct ifnet *)control, l); 621 622 if (req == PRU_PURGEIF) { 623 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 624 in6_purgeif((struct ifnet *)control); 625 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 626 return 0; 627 } 628 629 switch (req) { 630 case PRU_ATTACH: 631 if (in6p != NULL) 632 panic("rip6_attach"); 633 if (!priv) { 634 error = EACCES; 635 break; 636 } 637 s = splsoftnet(); 638 error = soreserve(so, rip6_sendspace, rip6_recvspace); 639 if (error != 0) { 640 splx(s); 641 break; 642 } 643 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 644 splx(s); 645 break; 646 } 647 splx(s); 648 in6p = sotoin6pcb(so); 649 in6p->in6p_ip6.ip6_nxt = (long)nam; 650 in6p->in6p_cksum = -1; 651 652 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 653 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 654 if (in6p->in6p_icmp6filt == NULL) { 655 in6_pcbdetach(in6p); 656 error = ENOMEM; 657 break; 658 } 659 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 660 break; 661 662 case PRU_DISCONNECT: 663 if ((so->so_state & SS_ISCONNECTED) == 0) { 664 error = ENOTCONN; 665 break; 666 } 667 in6p->in6p_faddr = in6addr_any; 668 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 669 break; 670 671 case PRU_ABORT: 672 soisdisconnected(so); 673 /* Fallthrough */ 674 case PRU_DETACH: 675 if (in6p == NULL) 676 panic("rip6_detach"); 677 if (so == ip6_mrouter) 678 ip6_mrouter_done(); 679 /* xxx: RSVP */ 680 if (in6p->in6p_icmp6filt != NULL) { 681 FREE(in6p->in6p_icmp6filt, M_PCB); 682 in6p->in6p_icmp6filt = NULL; 683 } 684 in6_pcbdetach(in6p); 685 break; 686 687 case PRU_BIND: 688 { 689 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 690 struct ifaddr *ia = NULL; 691 692 if (nam->m_len != sizeof(*addr)) { 693 error = EINVAL; 694 break; 695 } 696 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 697 error = EADDRNOTAVAIL; 698 break; 699 } 700 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 701 break; 702 703 /* 704 * we don't support mapped address here, it would confuse 705 * users so reject it 706 */ 707 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 708 error = EADDRNOTAVAIL; 709 break; 710 } 711 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 712 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 713 error = EADDRNOTAVAIL; 714 break; 715 } 716 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 717 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 718 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 719 error = EADDRNOTAVAIL; 720 break; 721 } 722 in6p->in6p_laddr = addr->sin6_addr; 723 break; 724 } 725 726 case PRU_CONNECT: 727 { 728 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 729 struct in6_addr *in6a = NULL; 730 struct ifnet *ifp = NULL; 731 int scope_ambiguous = 0; 732 733 if (nam->m_len != sizeof(*addr)) { 734 error = EINVAL; 735 break; 736 } 737 if (TAILQ_EMPTY(&ifnet)) { 738 error = EADDRNOTAVAIL; 739 break; 740 } 741 if (addr->sin6_family != AF_INET6) { 742 error = EAFNOSUPPORT; 743 break; 744 } 745 746 /* 747 * Application should provide a proper zone ID or the use of 748 * default zone IDs should be enabled. Unfortunately, some 749 * applications do not behave as it should, so we need a 750 * workaround. Even if an appropriate ID is not determined, 751 * we'll see if we can determine the outgoing interface. If we 752 * can, determine the zone ID based on the interface below. 753 */ 754 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 755 scope_ambiguous = 1; 756 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 757 return error; 758 759 /* Source address selection. XXX: need pcblookup? */ 760 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 761 in6p->in6p_moptions, (struct route *)&in6p->in6p_route, 762 &in6p->in6p_laddr, &ifp, &error); 763 if (in6a == NULL) { 764 if (error == 0) 765 error = EADDRNOTAVAIL; 766 break; 767 } 768 /* XXX: see above */ 769 if (ifp && scope_ambiguous && 770 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 771 break; 772 } 773 in6p->in6p_laddr = *in6a; 774 in6p->in6p_faddr = addr->sin6_addr; 775 soisconnected(so); 776 break; 777 } 778 779 case PRU_CONNECT2: 780 error = EOPNOTSUPP; 781 break; 782 783 /* 784 * Mark the connection as being incapable of futther input. 785 */ 786 case PRU_SHUTDOWN: 787 socantsendmore(so); 788 break; 789 /* 790 * Ship a packet out. The appropriate raw output 791 * routine handles any messaging necessary. 792 */ 793 case PRU_SEND: 794 { 795 struct sockaddr_in6 tmp; 796 struct sockaddr_in6 *dst; 797 798 /* always copy sockaddr to avoid overwrites */ 799 if (so->so_state & SS_ISCONNECTED) { 800 if (nam) { 801 error = EISCONN; 802 break; 803 } 804 /* XXX */ 805 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 806 dst = &tmp; 807 } else { 808 if (nam == NULL) { 809 error = ENOTCONN; 810 break; 811 } 812 if (nam->m_len != sizeof(tmp)) { 813 error = EINVAL; 814 break; 815 } 816 817 tmp = *mtod(nam, struct sockaddr_in6 *); 818 dst = &tmp; 819 820 if (dst->sin6_family != AF_INET6) { 821 error = EAFNOSUPPORT; 822 break; 823 } 824 } 825 error = rip6_output(m, so, dst, control); 826 m = NULL; 827 break; 828 } 829 830 case PRU_SENSE: 831 /* 832 * stat: don't bother with a blocksize 833 */ 834 return 0; 835 /* 836 * Not supported. 837 */ 838 case PRU_RCVOOB: 839 case PRU_RCVD: 840 case PRU_LISTEN: 841 case PRU_ACCEPT: 842 case PRU_SENDOOB: 843 error = EOPNOTSUPP; 844 break; 845 846 case PRU_SOCKADDR: 847 in6_setsockaddr(in6p, nam); 848 break; 849 850 case PRU_PEERADDR: 851 in6_setpeeraddr(in6p, nam); 852 break; 853 854 default: 855 panic("rip6_usrreq"); 856 } 857 if (m != NULL) 858 m_freem(m); 859 return error; 860 } 861 862 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 863 { 864 865 sysctl_createv(clog, 0, NULL, NULL, 866 CTLFLAG_PERMANENT, 867 CTLTYPE_NODE, "net", NULL, 868 NULL, 0, NULL, 0, 869 CTL_NET, CTL_EOL); 870 sysctl_createv(clog, 0, NULL, NULL, 871 CTLFLAG_PERMANENT, 872 CTLTYPE_NODE, "inet6", NULL, 873 NULL, 0, NULL, 0, 874 CTL_NET, PF_INET6, CTL_EOL); 875 sysctl_createv(clog, 0, NULL, NULL, 876 CTLFLAG_PERMANENT, 877 CTLTYPE_NODE, "raw6", 878 SYSCTL_DESCR("Raw IPv6 settings"), 879 NULL, 0, NULL, 0, 880 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 881 882 sysctl_createv(clog, 0, NULL, NULL, 883 CTLFLAG_PERMANENT, 884 CTLTYPE_STRUCT, "pcblist", 885 SYSCTL_DESCR("Raw IPv6 control block list"), 886 sysctl_inpcblist, 0, &raw6cbtable, 0, 887 CTL_NET, PF_INET6, IPPROTO_RAW, 888 CTL_CREATE, CTL_EOL); 889 sysctl_createv(clog, 0, NULL, NULL, 890 CTLFLAG_PERMANENT, 891 CTLTYPE_STRUCT, "stats", 892 SYSCTL_DESCR("Raw IPv6 statistics"), 893 NULL, 0, &rip6stat, sizeof(rip6stat), 894 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 895 CTL_EOL); 896 } 897
Indexes created Mon Sep 22 13:09:51 GMT 2025