raw_ip6.c revision 1.111
1 /* $NetBSD: raw_ip6.c,v 1.111 2013/06/05 19:01:26 christos 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 1.111 2013/06/05 19:01:26 christos 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 #include <net/net_stats.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/ip6_private.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/icmp6_private.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 #include <netinet6/scope6_var.h> 98 #include <netinet6/raw_ip6.h> 99 100 #ifdef IPSEC 101 #include <netipsec/ipsec.h> 102 #include <netipsec/ipsec_var.h> 103 #include <netipsec/ipsec_private.h> 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 static percpu_t *rip6stat_percpu; 121 122 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 123 124 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 125 126 /* 127 * Initialize raw connection block queue. 128 */ 129 void 130 rip6_init(void) 131 { 132 133 sysctl_net_inet6_raw6_setup(NULL); 134 in6_pcbinit(&raw6cbtable, 1, 1); 135 136 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 137 } 138 139 /* 140 * Setup generic address and protocol structures 141 * for raw_input routine, then pass them along with 142 * mbuf chain. 143 */ 144 int 145 rip6_input(struct mbuf **mp, int *offp, int proto) 146 { 147 struct mbuf *m = *mp; 148 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 149 struct inpcb_hdr *inph; 150 struct in6pcb *in6p; 151 struct in6pcb *last = NULL; 152 struct sockaddr_in6 rip6src; 153 struct mbuf *opts = NULL; 154 155 RIP6_STATINC(RIP6_STAT_IPACKETS); 156 157 #if defined(NFAITH) && 0 < NFAITH 158 if (faithprefix(&ip6->ip6_dst)) { 159 /* send icmp6 host unreach? */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 #endif 164 165 /* Be proactive about malicious use of IPv4 mapped address */ 166 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 167 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 168 /* XXX stat */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 174 if (sa6_recoverscope(&rip6src) != 0) { 175 /* XXX: should be impossible. */ 176 m_freem(m); 177 return IPPROTO_DONE; 178 } 179 180 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 181 in6p = (struct in6pcb *)inph; 182 if (in6p->in6p_af != AF_INET6) 183 continue; 184 if (in6p->in6p_ip6.ip6_nxt && 185 in6p->in6p_ip6.ip6_nxt != proto) 186 continue; 187 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 188 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 192 continue; 193 if (in6p->in6p_cksum != -1) { 194 RIP6_STATINC(RIP6_STAT_ISUM); 195 if (in6_cksum(m, proto, *offp, 196 m->m_pkthdr.len - *offp)) { 197 RIP6_STATINC(RIP6_STAT_BADSUM); 198 continue; 199 } 200 } 201 if (last) { 202 struct mbuf *n; 203 204 #ifdef IPSEC 205 /* 206 * Check AH/ESP integrity 207 */ 208 if (!ipsec6_in_reject(m,last)) 209 #endif /* IPSEC */ 210 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 211 if (last->in6p_flags & IN6P_CONTROLOPTS) 212 ip6_savecontrol(last, &opts, ip6, n); 213 /* strip intermediate headers */ 214 m_adj(n, *offp); 215 if (sbappendaddr(&last->in6p_socket->so_rcv, 216 (struct sockaddr *)&rip6src, n, opts) == 0) { 217 /* should notify about lost packet */ 218 m_freem(n); 219 if (opts) 220 m_freem(opts); 221 RIP6_STATINC(RIP6_STAT_FULLSOCK); 222 } else 223 sorwakeup(last->in6p_socket); 224 opts = NULL; 225 } 226 } 227 last = in6p; 228 } 229 #ifdef IPSEC 230 if (last && ipsec6_in_reject(m, last)) { 231 m_freem(m); 232 /* 233 * XXX ipsec6_in_reject update stat if there is an error 234 * so we just need to update stats by hand in the case of last is 235 * NULL 236 */ 237 if (!last) 238 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); 239 IP6_STATDEC(IP6_STAT_DELIVERED); 240 /* do not inject data into pcb */ 241 } else 242 #endif /* IPSEC */ 243 if (last) { 244 if (last->in6p_flags & IN6P_CONTROLOPTS) 245 ip6_savecontrol(last, &opts, ip6, m); 246 /* strip intermediate headers */ 247 m_adj(m, *offp); 248 if (sbappendaddr(&last->in6p_socket->so_rcv, 249 (struct sockaddr *)&rip6src, m, opts) == 0) { 250 m_freem(m); 251 if (opts) 252 m_freem(opts); 253 RIP6_STATINC(RIP6_STAT_FULLSOCK); 254 } else 255 sorwakeup(last->in6p_socket); 256 } else { 257 RIP6_STATINC(RIP6_STAT_NOSOCK); 258 if (m->m_flags & M_MCAST) 259 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 260 if (proto == IPPROTO_NONE) 261 m_freem(m); 262 else { 263 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 264 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 265 icmp6_error(m, ICMP6_PARAM_PROB, 266 ICMP6_PARAMPROB_NEXTHEADER, 267 prvnxtp - mtod(m, u_int8_t *)); 268 } 269 IP6_STATDEC(IP6_STAT_DELIVERED); 270 } 271 return IPPROTO_DONE; 272 } 273 274 void * 275 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 276 { 277 struct ip6_hdr *ip6; 278 struct ip6ctlparam *ip6cp = NULL; 279 const struct sockaddr_in6 *sa6_src = NULL; 280 void *cmdarg; 281 void (*notify)(struct in6pcb *, int) = in6_rtchange; 282 int nxt; 283 284 if (sa->sa_family != AF_INET6 || 285 sa->sa_len != sizeof(struct sockaddr_in6)) 286 return NULL; 287 288 if ((unsigned)cmd >= PRC_NCMDS) 289 return NULL; 290 if (PRC_IS_REDIRECT(cmd)) 291 notify = in6_rtchange, d = NULL; 292 else if (cmd == PRC_HOSTDEAD) 293 d = NULL; 294 else if (cmd == PRC_MSGSIZE) 295 ; /* special code is present, see below */ 296 else if (inet6ctlerrmap[cmd] == 0) 297 return NULL; 298 299 /* if the parameter is from icmp6, decode it. */ 300 if (d != NULL) { 301 ip6cp = (struct ip6ctlparam *)d; 302 ip6 = ip6cp->ip6c_ip6; 303 cmdarg = ip6cp->ip6c_cmdarg; 304 sa6_src = ip6cp->ip6c_src; 305 nxt = ip6cp->ip6c_nxt; 306 } else { 307 ip6 = NULL; 308 cmdarg = NULL; 309 sa6_src = &sa6_any; 310 nxt = -1; 311 } 312 313 if (ip6 && cmd == PRC_MSGSIZE) { 314 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 315 int valid = 0; 316 struct in6pcb *in6p; 317 318 /* 319 * Check to see if we have a valid raw IPv6 socket 320 * corresponding to the address in the ICMPv6 message 321 * payload, and the protocol (ip6_nxt) meets the socket. 322 * XXX chase extension headers, or pass final nxt value 323 * from icmp6_notify_error() 324 */ 325 in6p = NULL; 326 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 327 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 328 #if 0 329 if (!in6p) { 330 /* 331 * As the use of sendto(2) is fairly popular, 332 * we may want to allow non-connected pcb too. 333 * But it could be too weak against attacks... 334 * We should at least check if the local 335 * address (= s) is really ours. 336 */ 337 in6p = in6_pcblookup_bind(&raw6cbtable, 338 &sa6->sin6_addr, 0, 0); 339 } 340 #endif 341 342 if (in6p && in6p->in6p_ip6.ip6_nxt && 343 in6p->in6p_ip6.ip6_nxt == nxt) 344 valid++; 345 346 /* 347 * Depending on the value of "valid" and routing table 348 * size (mtudisc_{hi,lo}wat), we will: 349 * - recalculate the new MTU and create the 350 * corresponding routing entry, or 351 * - ignore the MTU change notification. 352 */ 353 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 354 355 /* 356 * regardless of if we called icmp6_mtudisc_update(), 357 * we need to call in6_pcbnotify(), to notify path MTU 358 * change to the userland (RFC3542), because some 359 * unconnected sockets may share the same destination 360 * and want to know the path MTU. 361 */ 362 } 363 364 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 365 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 366 return NULL; 367 } 368 369 /* 370 * Generate IPv6 header and pass packet to ip6_output. 371 * Tack on options user may have setup with control call. 372 */ 373 int 374 rip6_output(struct mbuf *m, struct socket * const so, 375 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 376 { 377 struct in6_addr *dst; 378 struct ip6_hdr *ip6; 379 struct in6pcb *in6p; 380 u_int plen = m->m_pkthdr.len; 381 int error = 0; 382 struct ip6_pktopts opt, *optp = NULL; 383 struct ifnet *oifp = NULL; 384 int type, code; /* for ICMPv6 output statistics only */ 385 int scope_ambiguous = 0; 386 struct in6_addr *in6a; 387 388 in6p = sotoin6pcb(so); 389 390 dst = &dstsock->sin6_addr; 391 if (control) { 392 if ((error = ip6_setpktopts(control, &opt, 393 in6p->in6p_outputopts, 394 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 395 goto bad; 396 } 397 optp = &opt; 398 } else 399 optp = in6p->in6p_outputopts; 400 401 /* 402 * Check and convert scope zone ID into internal form. 403 * XXX: we may still need to determine the zone later. 404 */ 405 if (!(so->so_state & SS_ISCONNECTED)) { 406 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 407 scope_ambiguous = 1; 408 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 409 goto bad; 410 } 411 412 /* 413 * For an ICMPv6 packet, we should know its type and code 414 * to update statistics. 415 */ 416 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 417 struct icmp6_hdr *icmp6; 418 if (m->m_len < sizeof(struct icmp6_hdr) && 419 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 420 error = ENOBUFS; 421 goto bad; 422 } 423 icmp6 = mtod(m, struct icmp6_hdr *); 424 type = icmp6->icmp6_type; 425 code = icmp6->icmp6_code; 426 } else { 427 type = 0; 428 code = 0; 429 } 430 431 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 432 if (!m) { 433 error = ENOBUFS; 434 goto bad; 435 } 436 ip6 = mtod(m, struct ip6_hdr *); 437 438 /* 439 * Next header might not be ICMP6 but use its pseudo header anyway. 440 */ 441 ip6->ip6_dst = *dst; 442 443 /* 444 * Source address selection. 445 */ 446 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 447 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, 448 &error)) == 0) { 449 if (error == 0) 450 error = EADDRNOTAVAIL; 451 goto bad; 452 } 453 ip6->ip6_src = *in6a; 454 455 if (oifp && scope_ambiguous) { 456 /* 457 * Application should provide a proper zone ID or the use of 458 * default zone IDs should be enabled. Unfortunately, some 459 * applications do not behave as it should, so we need a 460 * workaround. Even if an appropriate ID is not determined 461 * (when it's required), if we can determine the outgoing 462 * interface. determine the zone ID based on the interface. 463 */ 464 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 465 if (error != 0) 466 goto bad; 467 } 468 ip6->ip6_dst = dstsock->sin6_addr; 469 470 /* fill in the rest of the IPv6 header fields */ 471 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 472 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 473 ip6->ip6_vfc |= IPV6_VERSION; 474 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 475 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 476 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 477 478 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 479 in6p->in6p_cksum != -1) { 480 int off; 481 u_int16_t sum; 482 483 /* compute checksum */ 484 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 485 off = offsetof(struct icmp6_hdr, icmp6_cksum); 486 else 487 off = in6p->in6p_cksum; 488 if (plen < off + 1) { 489 error = EINVAL; 490 goto bad; 491 } 492 off += sizeof(struct ip6_hdr); 493 494 sum = 0; 495 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 496 M_DONTWAIT); 497 if (m == NULL) { 498 error = ENOBUFS; 499 goto bad; 500 } 501 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 502 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 503 M_DONTWAIT); 504 if (m == NULL) { 505 error = ENOBUFS; 506 goto bad; 507 } 508 } 509 510 error = ip6_output(m, optp, &in6p->in6p_route, 0, 511 in6p->in6p_moptions, so, &oifp); 512 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 513 if (oifp) 514 icmp6_ifoutstat_inc(oifp, type, code); 515 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 516 } else 517 RIP6_STATINC(RIP6_STAT_OPACKETS); 518 519 goto freectl; 520 521 bad: 522 if (m) 523 m_freem(m); 524 525 freectl: 526 if (control) { 527 ip6_clearpktopts(&opt, -1); 528 m_freem(control); 529 } 530 return error; 531 } 532 533 /* 534 * Raw IPv6 socket option processing. 535 */ 536 int 537 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 538 { 539 int error = 0; 540 541 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 542 int optval; 543 544 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 545 if (op == PRCO_GETOPT) { 546 optval = 1; 547 error = sockopt_set(sopt, &optval, sizeof(optval)); 548 } else if (op == PRCO_SETOPT) { 549 error = sockopt_getint(sopt, &optval); 550 if (error) 551 goto out; 552 if (optval == 0) 553 error = EINVAL; 554 } 555 556 goto out; 557 } else if (sopt->sopt_level != IPPROTO_IPV6) 558 return ip6_ctloutput(op, so, sopt); 559 560 switch (sopt->sopt_name) { 561 case MRT6_INIT: 562 case MRT6_DONE: 563 case MRT6_ADD_MIF: 564 case MRT6_DEL_MIF: 565 case MRT6_ADD_MFC: 566 case MRT6_DEL_MFC: 567 case MRT6_PIM: 568 if (op == PRCO_SETOPT) 569 error = ip6_mrouter_set(so, sopt); 570 else if (op == PRCO_GETOPT) 571 error = ip6_mrouter_get(so, sopt); 572 else 573 error = EINVAL; 574 break; 575 case IPV6_CHECKSUM: 576 return ip6_raw_ctloutput(op, so, sopt); 577 default: 578 return ip6_ctloutput(op, so, sopt); 579 } 580 out: 581 return error; 582 } 583 584 extern u_long rip6_sendspace; 585 extern u_long rip6_recvspace; 586 587 int 588 rip6_usrreq(struct socket *so, int req, struct mbuf *m, 589 struct mbuf *nam, struct mbuf *control, struct lwp *l) 590 { 591 struct in6pcb *in6p = sotoin6pcb(so); 592 int s; 593 int error = 0; 594 595 if (req == PRU_CONTROL) 596 return in6_control(so, (u_long)m, (void *)nam, 597 (struct ifnet *)control, l); 598 599 if (req == PRU_PURGEIF) { 600 mutex_enter(softnet_lock); 601 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 602 in6_purgeif((struct ifnet *)control); 603 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 604 mutex_exit(softnet_lock); 605 return 0; 606 } 607 608 switch (req) { 609 case PRU_ATTACH: 610 error = kauth_authorize_network(l->l_cred, 611 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 612 KAUTH_ARG(AF_INET6), 613 KAUTH_ARG(SOCK_RAW), 614 KAUTH_ARG(so->so_proto->pr_protocol)); 615 sosetlock(so); 616 if (in6p != NULL) 617 panic("rip6_attach"); 618 if (error) { 619 break; 620 } 621 s = splsoftnet(); 622 error = soreserve(so, rip6_sendspace, rip6_recvspace); 623 if (error != 0) { 624 splx(s); 625 break; 626 } 627 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 628 splx(s); 629 break; 630 } 631 splx(s); 632 in6p = sotoin6pcb(so); 633 in6p->in6p_ip6.ip6_nxt = (long)nam; 634 in6p->in6p_cksum = -1; 635 636 in6p->in6p_icmp6filt = malloc(sizeof(struct icmp6_filter), 637 M_PCB, M_NOWAIT); 638 if (in6p->in6p_icmp6filt == NULL) { 639 in6_pcbdetach(in6p); 640 error = ENOMEM; 641 break; 642 } 643 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 644 break; 645 646 case PRU_DISCONNECT: 647 if ((so->so_state & SS_ISCONNECTED) == 0) { 648 error = ENOTCONN; 649 break; 650 } 651 in6p->in6p_faddr = in6addr_any; 652 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 653 break; 654 655 case PRU_ABORT: 656 soisdisconnected(so); 657 /* Fallthrough */ 658 case PRU_DETACH: 659 if (in6p == NULL) 660 panic("rip6_detach"); 661 if (so == ip6_mrouter) 662 ip6_mrouter_done(); 663 /* xxx: RSVP */ 664 if (in6p->in6p_icmp6filt != NULL) { 665 free(in6p->in6p_icmp6filt, M_PCB); 666 in6p->in6p_icmp6filt = NULL; 667 } 668 in6_pcbdetach(in6p); 669 break; 670 671 case PRU_BIND: 672 { 673 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 674 struct ifaddr *ia = NULL; 675 676 if (nam->m_len != sizeof(*addr)) { 677 error = EINVAL; 678 break; 679 } 680 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 681 error = EADDRNOTAVAIL; 682 break; 683 } 684 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 685 break; 686 687 /* 688 * we don't support mapped address here, it would confuse 689 * users so reject it 690 */ 691 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 692 error = EADDRNOTAVAIL; 693 break; 694 } 695 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 696 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 697 error = EADDRNOTAVAIL; 698 break; 699 } 700 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 701 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 702 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 703 error = EADDRNOTAVAIL; 704 break; 705 } 706 in6p->in6p_laddr = addr->sin6_addr; 707 break; 708 } 709 710 case PRU_CONNECT: 711 { 712 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 713 struct in6_addr *in6a = NULL; 714 struct ifnet *ifp = NULL; 715 int scope_ambiguous = 0; 716 717 if (nam->m_len != sizeof(*addr)) { 718 error = EINVAL; 719 break; 720 } 721 if (TAILQ_EMPTY(&ifnet)) { 722 error = EADDRNOTAVAIL; 723 break; 724 } 725 if (addr->sin6_family != AF_INET6) { 726 error = EAFNOSUPPORT; 727 break; 728 } 729 730 /* 731 * Application should provide a proper zone ID or the use of 732 * default zone IDs should be enabled. Unfortunately, some 733 * applications do not behave as it should, so we need a 734 * workaround. Even if an appropriate ID is not determined, 735 * we'll see if we can determine the outgoing interface. If we 736 * can, determine the zone ID based on the interface below. 737 */ 738 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 739 scope_ambiguous = 1; 740 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 741 return error; 742 743 /* Source address selection. XXX: need pcblookup? */ 744 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 745 in6p->in6p_moptions, &in6p->in6p_route, 746 &in6p->in6p_laddr, &ifp, &error); 747 if (in6a == NULL) { 748 if (error == 0) 749 error = EADDRNOTAVAIL; 750 break; 751 } 752 /* XXX: see above */ 753 if (ifp && scope_ambiguous && 754 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 755 break; 756 } 757 in6p->in6p_laddr = *in6a; 758 in6p->in6p_faddr = addr->sin6_addr; 759 soisconnected(so); 760 break; 761 } 762 763 case PRU_CONNECT2: 764 error = EOPNOTSUPP; 765 break; 766 767 /* 768 * Mark the connection as being incapable of futther input. 769 */ 770 case PRU_SHUTDOWN: 771 socantsendmore(so); 772 break; 773 /* 774 * Ship a packet out. The appropriate raw output 775 * routine handles any messaging necessary. 776 */ 777 case PRU_SEND: 778 { 779 struct sockaddr_in6 tmp; 780 struct sockaddr_in6 *dst; 781 782 /* always copy sockaddr to avoid overwrites */ 783 if (so->so_state & SS_ISCONNECTED) { 784 if (nam) { 785 error = EISCONN; 786 break; 787 } 788 /* XXX */ 789 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 790 dst = &tmp; 791 } else { 792 if (nam == NULL) { 793 error = ENOTCONN; 794 break; 795 } 796 if (nam->m_len != sizeof(tmp)) { 797 error = EINVAL; 798 break; 799 } 800 801 tmp = *mtod(nam, struct sockaddr_in6 *); 802 dst = &tmp; 803 804 if (dst->sin6_family != AF_INET6) { 805 error = EAFNOSUPPORT; 806 break; 807 } 808 } 809 error = rip6_output(m, so, dst, control); 810 m = NULL; 811 break; 812 } 813 814 case PRU_SENSE: 815 /* 816 * stat: don't bother with a blocksize 817 */ 818 return 0; 819 /* 820 * Not supported. 821 */ 822 case PRU_RCVOOB: 823 case PRU_RCVD: 824 case PRU_LISTEN: 825 case PRU_ACCEPT: 826 case PRU_SENDOOB: 827 error = EOPNOTSUPP; 828 break; 829 830 case PRU_SOCKADDR: 831 in6_setsockaddr(in6p, nam); 832 break; 833 834 case PRU_PEERADDR: 835 in6_setpeeraddr(in6p, nam); 836 break; 837 838 default: 839 panic("rip6_usrreq"); 840 } 841 if (m != NULL) 842 m_freem(m); 843 return error; 844 } 845 846 static int 847 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 848 { 849 850 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 851 } 852 853 static void 854 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 855 { 856 857 sysctl_createv(clog, 0, NULL, NULL, 858 CTLFLAG_PERMANENT, 859 CTLTYPE_NODE, "net", NULL, 860 NULL, 0, NULL, 0, 861 CTL_NET, CTL_EOL); 862 sysctl_createv(clog, 0, NULL, NULL, 863 CTLFLAG_PERMANENT, 864 CTLTYPE_NODE, "inet6", NULL, 865 NULL, 0, NULL, 0, 866 CTL_NET, PF_INET6, CTL_EOL); 867 sysctl_createv(clog, 0, NULL, NULL, 868 CTLFLAG_PERMANENT, 869 CTLTYPE_NODE, "raw6", 870 SYSCTL_DESCR("Raw IPv6 settings"), 871 NULL, 0, NULL, 0, 872 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 873 874 sysctl_createv(clog, 0, NULL, NULL, 875 CTLFLAG_PERMANENT, 876 CTLTYPE_STRUCT, "pcblist", 877 SYSCTL_DESCR("Raw IPv6 control block list"), 878 sysctl_inpcblist, 0, &raw6cbtable, 0, 879 CTL_NET, PF_INET6, IPPROTO_RAW, 880 CTL_CREATE, CTL_EOL); 881 sysctl_createv(clog, 0, NULL, NULL, 882 CTLFLAG_PERMANENT, 883 CTLTYPE_STRUCT, "stats", 884 SYSCTL_DESCR("Raw IPv6 statistics"), 885 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 886 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 887 CTL_EOL); 888 } 889
Indexes created Tue Sep 23 14:10:03 GMT 2025