raw_ip6.c revision 1.89
1 /* $NetBSD: raw_ip6.c,v 1.89 2007/11/06 23:40:38 dyoung 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 1.89 2007/11/06 23:40:38 dyoung 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_mroute.h> 90 #include <netinet/icmp6.h> 91 #include <netinet6/in6_pcb.h> 92 #include <netinet6/nd6.h> 93 #include <netinet6/ip6protosw.h> 94 #include <netinet6/scope6_var.h> 95 #include <netinet6/raw_ip6.h> 96 97 #ifdef IPSEC 98 #include <netinet6/ipsec.h> 99 #endif /* IPSEC */ 100 101 #ifdef FAST_IPSEC 102 #include <netipsec/ipsec.h> 103 #include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */ 104 #include <netipsec/ipsec6.h> 105 #endif 106 107 #include "faith.h" 108 #if defined(NFAITH) && 0 < NFAITH 109 #include <net/if_faith.h> 110 #endif 111 112 extern struct inpcbtable rawcbtable; 113 struct inpcbtable raw6cbtable; 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 struct rip6stat rip6stat; 121 122 /* 123 * Initialize raw connection block queue. 124 */ 125 void 126 rip6_init() 127 { 128 129 in6_pcbinit(&raw6cbtable, 1, 1); 130 } 131 132 /* 133 * Setup generic address and protocol structures 134 * for raw_input routine, then pass them along with 135 * mbuf chain. 136 */ 137 int 138 rip6_input(struct mbuf **mp, int *offp, int proto) 139 { 140 struct mbuf *m = *mp; 141 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 142 struct inpcb_hdr *inph; 143 struct in6pcb *in6p; 144 struct in6pcb *last = NULL; 145 struct sockaddr_in6 rip6src; 146 struct mbuf *opts = NULL; 147 148 rip6stat.rip6s_ipackets++; 149 150 #if defined(NFAITH) && 0 < NFAITH 151 if (faithprefix(&ip6->ip6_dst)) { 152 /* send icmp6 host unreach? */ 153 m_freem(m); 154 return IPPROTO_DONE; 155 } 156 #endif 157 158 /* Be proactive about malicious use of IPv4 mapped address */ 159 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 160 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 161 /* XXX stat */ 162 m_freem(m); 163 return IPPROTO_DONE; 164 } 165 166 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 167 if (sa6_recoverscope(&rip6src) != 0) { 168 /* XXX: should be impossible. */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 174 in6p = (struct in6pcb *)inph; 175 if (in6p->in6p_af != AF_INET6) 176 continue; 177 if (in6p->in6p_ip6.ip6_nxt && 178 in6p->in6p_ip6.ip6_nxt != proto) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 181 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 182 continue; 183 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 184 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 185 continue; 186 if (in6p->in6p_cksum != -1) { 187 rip6stat.rip6s_isum++; 188 if (in6_cksum(m, proto, *offp, 189 m->m_pkthdr.len - *offp)) { 190 rip6stat.rip6s_badsum++; 191 continue; 192 } 193 } 194 if (last) { 195 struct mbuf *n; 196 197 #ifdef IPSEC 198 /* 199 * Check AH/ESP integrity. 200 */ 201 if (ipsec6_in_reject(m, last)) { 202 ipsec6stat.in_polvio++; 203 /* do not inject data into pcb */ 204 } else 205 #endif /* IPSEC */ 206 #ifdef FAST_IPSEC 207 /* 208 * Check AH/ESP integrity 209 */ 210 if (!ipsec6_in_reject(m,last)) 211 #endif /* FAST_IPSEC */ 212 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 213 if (last->in6p_flags & IN6P_CONTROLOPTS) 214 ip6_savecontrol(last, &opts, ip6, n); 215 /* strip intermediate headers */ 216 m_adj(n, *offp); 217 if (sbappendaddr(&last->in6p_socket->so_rcv, 218 (struct sockaddr *)&rip6src, n, opts) == 0) { 219 /* should notify about lost packet */ 220 m_freem(n); 221 if (opts) 222 m_freem(opts); 223 rip6stat.rip6s_fullsock++; 224 } else 225 sorwakeup(last->in6p_socket); 226 opts = NULL; 227 } 228 } 229 last = in6p; 230 } 231 #ifdef IPSEC 232 /* 233 * Check AH/ESP integrity. 234 */ 235 if (last && ipsec6_in_reject(m, last)) { 236 m_freem(m); 237 ipsec6stat.in_polvio++; 238 ip6stat.ip6s_delivered--; 239 /* do not inject data into pcb */ 240 } else 241 #endif /* IPSEC */ 242 #ifdef FAST_IPSEC 243 if (last && ipsec6_in_reject(m, last)) { 244 m_freem(m); 245 /* 246 * XXX ipsec6_in_reject update stat if there is an error 247 * so we just need to update stats by hand in the case of last is 248 * NULL 249 */ 250 if (!last) 251 ipsec6stat.in_polvio++; 252 ip6stat.ip6s_delivered--; 253 /* do not inject data into pcb */ 254 } else 255 #endif /* FAST_IPSEC */ 256 if (last) { 257 if (last->in6p_flags & IN6P_CONTROLOPTS) 258 ip6_savecontrol(last, &opts, ip6, m); 259 /* strip intermediate headers */ 260 m_adj(m, *offp); 261 if (sbappendaddr(&last->in6p_socket->so_rcv, 262 (struct sockaddr *)&rip6src, m, opts) == 0) { 263 m_freem(m); 264 if (opts) 265 m_freem(opts); 266 rip6stat.rip6s_fullsock++; 267 } else 268 sorwakeup(last->in6p_socket); 269 } else { 270 rip6stat.rip6s_nosock++; 271 if (m->m_flags & M_MCAST) 272 rip6stat.rip6s_nosockmcast++; 273 if (proto == IPPROTO_NONE) 274 m_freem(m); 275 else { 276 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 277 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 278 icmp6_error(m, ICMP6_PARAM_PROB, 279 ICMP6_PARAMPROB_NEXTHEADER, 280 prvnxtp - mtod(m, u_int8_t *)); 281 } 282 ip6stat.ip6s_delivered--; 283 } 284 return IPPROTO_DONE; 285 } 286 287 void 288 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 289 { 290 struct ip6_hdr *ip6; 291 struct ip6ctlparam *ip6cp = NULL; 292 const struct sockaddr_in6 *sa6_src = NULL; 293 void *cmdarg; 294 void (*notify)(struct in6pcb *, int) = in6_rtchange; 295 int nxt; 296 297 if (sa->sa_family != AF_INET6 || 298 sa->sa_len != sizeof(struct sockaddr_in6)) 299 return; 300 301 if ((unsigned)cmd >= PRC_NCMDS) 302 return; 303 if (PRC_IS_REDIRECT(cmd)) 304 notify = in6_rtchange, d = NULL; 305 else if (cmd == PRC_HOSTDEAD) 306 d = NULL; 307 else if (cmd == PRC_MSGSIZE) 308 ; /* special code is present, see below */ 309 else if (inet6ctlerrmap[cmd] == 0) 310 return; 311 312 /* if the parameter is from icmp6, decode it. */ 313 if (d != NULL) { 314 ip6cp = (struct ip6ctlparam *)d; 315 ip6 = ip6cp->ip6c_ip6; 316 cmdarg = ip6cp->ip6c_cmdarg; 317 sa6_src = ip6cp->ip6c_src; 318 nxt = ip6cp->ip6c_nxt; 319 } else { 320 ip6 = NULL; 321 cmdarg = NULL; 322 sa6_src = &sa6_any; 323 nxt = -1; 324 } 325 326 if (ip6 && cmd == PRC_MSGSIZE) { 327 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 328 int valid = 0; 329 struct in6pcb *in6p; 330 331 /* 332 * Check to see if we have a valid raw IPv6 socket 333 * corresponding to the address in the ICMPv6 message 334 * payload, and the protocol (ip6_nxt) meets the socket. 335 * XXX chase extension headers, or pass final nxt value 336 * from icmp6_notify_error() 337 */ 338 in6p = NULL; 339 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 340 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 341 #if 0 342 if (!in6p) { 343 /* 344 * As the use of sendto(2) is fairly popular, 345 * we may want to allow non-connected pcb too. 346 * But it could be too weak against attacks... 347 * We should at least check if the local 348 * address (= s) is really ours. 349 */ 350 in6p = in6_pcblookup_bind(&raw6cbtable, 351 &sa6->sin6_addr, 0, 0); 352 } 353 #endif 354 355 if (in6p && in6p->in6p_ip6.ip6_nxt && 356 in6p->in6p_ip6.ip6_nxt == nxt) 357 valid++; 358 359 /* 360 * Depending on the value of "valid" and routing table 361 * size (mtudisc_{hi,lo}wat), we will: 362 * - recalculate the new MTU and create the 363 * corresponding routing entry, or 364 * - ignore the MTU change notification. 365 */ 366 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 367 368 /* 369 * regardless of if we called icmp6_mtudisc_update(), 370 * we need to call in6_pcbnotify(), to notify path MTU 371 * change to the userland (RFC3542), because some 372 * unconnected sockets may share the same destination 373 * and want to know the path MTU. 374 */ 375 } 376 377 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 378 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 379 } 380 381 /* 382 * Generate IPv6 header and pass packet to ip6_output. 383 * Tack on options user may have setup with control call. 384 */ 385 int 386 rip6_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *dstsock, 387 struct mbuf *control) 388 { 389 struct in6_addr *dst; 390 struct ip6_hdr *ip6; 391 struct in6pcb *in6p; 392 u_int plen = m->m_pkthdr.len; 393 int error = 0; 394 struct ip6_pktopts opt, *optp = NULL; 395 struct ifnet *oifp = NULL; 396 int type, code; /* for ICMPv6 output statistics only */ 397 int priv = 0; 398 int scope_ambiguous = 0; 399 struct in6_addr *in6a; 400 401 in6p = sotoin6pcb(so); 402 403 priv = 0; 404 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 405 KAUTH_GENERIC_ISSUSER, NULL)) 406 priv = 1; 407 408 dst = &dstsock->sin6_addr; 409 if (control) { 410 if ((error = ip6_setpktopts(control, &opt, 411 in6p->in6p_outputopts, 412 priv, so->so_proto->pr_protocol)) != 0) { 413 goto bad; 414 } 415 optp = &opt; 416 } else 417 optp = in6p->in6p_outputopts; 418 419 /* 420 * Check and convert scope zone ID into internal form. 421 * XXX: we may still need to determine the zone later. 422 */ 423 if (!(so->so_state & SS_ISCONNECTED)) { 424 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 425 scope_ambiguous = 1; 426 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 427 goto bad; 428 } 429 430 /* 431 * For an ICMPv6 packet, we should know its type and code 432 * to update statistics. 433 */ 434 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 435 struct icmp6_hdr *icmp6; 436 if (m->m_len < sizeof(struct icmp6_hdr) && 437 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 438 error = ENOBUFS; 439 goto bad; 440 } 441 icmp6 = mtod(m, struct icmp6_hdr *); 442 type = icmp6->icmp6_type; 443 code = icmp6->icmp6_code; 444 } else { 445 type = 0; 446 code = 0; 447 } 448 449 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 450 if (!m) { 451 error = ENOBUFS; 452 goto bad; 453 } 454 ip6 = mtod(m, struct ip6_hdr *); 455 456 /* 457 * Next header might not be ICMP6 but use its pseudo header anyway. 458 */ 459 ip6->ip6_dst = *dst; 460 461 /* 462 * Source address selection. 463 */ 464 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 465 (struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp, 466 &error)) == 0) { 467 if (error == 0) 468 error = EADDRNOTAVAIL; 469 goto bad; 470 } 471 ip6->ip6_src = *in6a; 472 473 if (oifp && scope_ambiguous) { 474 /* 475 * Application should provide a proper zone ID or the use of 476 * default zone IDs should be enabled. Unfortunately, some 477 * applications do not behave as it should, so we need a 478 * workaround. Even if an appropriate ID is not determined 479 * (when it's required), if we can determine the outgoing 480 * interface. determine the zone ID based on the interface. 481 */ 482 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 483 if (error != 0) 484 goto bad; 485 } 486 ip6->ip6_dst = dstsock->sin6_addr; 487 488 /* fill in the rest of the IPv6 header fields */ 489 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 490 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 491 ip6->ip6_vfc |= IPV6_VERSION; 492 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 493 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 494 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 495 496 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 497 in6p->in6p_cksum != -1) { 498 int off; 499 u_int16_t sum; 500 501 /* compute checksum */ 502 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 503 off = offsetof(struct icmp6_hdr, icmp6_cksum); 504 else 505 off = in6p->in6p_cksum; 506 if (plen < off + 1) { 507 error = EINVAL; 508 goto bad; 509 } 510 off += sizeof(struct ip6_hdr); 511 512 sum = 0; 513 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 514 M_DONTWAIT); 515 if (m == NULL) { 516 error = ENOBUFS; 517 goto bad; 518 } 519 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 520 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 521 M_DONTWAIT); 522 if (m == NULL) { 523 error = ENOBUFS; 524 goto bad; 525 } 526 } 527 528 error = ip6_output(m, optp, &in6p->in6p_route, 0, 529 in6p->in6p_moptions, so, &oifp); 530 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 531 if (oifp) 532 icmp6_ifoutstat_inc(oifp, type, code); 533 icmp6stat.icp6s_outhist[type]++; 534 } else 535 rip6stat.rip6s_opackets++; 536 537 goto freectl; 538 539 bad: 540 if (m) 541 m_freem(m); 542 543 freectl: 544 if (control) { 545 ip6_clearpktopts(&opt, -1); 546 m_freem(control); 547 } 548 return error; 549 } 550 551 /* 552 * Raw IPv6 socket option processing. 553 */ 554 int 555 rip6_ctloutput(int op, struct socket *so, int level, int optname, 556 struct mbuf **mp) 557 { 558 int error = 0; 559 560 if (level == SOL_SOCKET && optname == SO_NOHEADER) { 561 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 562 if (optname != SO_NOHEADER) 563 return ip6_ctloutput(op, so, level, optname, mp); 564 else 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 Tue Sep 30 20:09:53 GMT 2025