raw_ip6.c revision 1.104
1 /* $NetBSD: raw_ip6.c,v 1.104 2009/05/06 21:41:59 elad 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 1.104 2009/05/06 21:41:59 elad 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 <netinet6/ipsec.h> 102 #include <netinet6/ipsec_private.h> 103 #endif /* IPSEC */ 104 105 #ifdef FAST_IPSEC 106 #include <netipsec/ipsec.h> 107 #include <netipsec/ipsec_var.h> 108 #include <netipsec/ipsec_private.h> 109 #include <netipsec/ipsec6.h> 110 #endif 111 112 #include "faith.h" 113 #if defined(NFAITH) && 0 < NFAITH 114 #include <net/if_faith.h> 115 #endif 116 117 extern struct inpcbtable rawcbtable; 118 struct inpcbtable raw6cbtable; 119 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 120 121 /* 122 * Raw interface to IP6 protocol. 123 */ 124 125 static percpu_t *rip6stat_percpu; 126 127 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 128 129 /* 130 * Initialize raw connection block queue. 131 */ 132 void 133 rip6_init(void) 134 { 135 136 in6_pcbinit(&raw6cbtable, 1, 1); 137 138 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 139 } 140 141 /* 142 * Setup generic address and protocol structures 143 * for raw_input routine, then pass them along with 144 * mbuf chain. 145 */ 146 int 147 rip6_input(struct mbuf **mp, int *offp, int proto) 148 { 149 struct mbuf *m = *mp; 150 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 151 struct inpcb_hdr *inph; 152 struct in6pcb *in6p; 153 struct in6pcb *last = NULL; 154 struct sockaddr_in6 rip6src; 155 struct mbuf *opts = NULL; 156 157 RIP6_STATINC(RIP6_STAT_IPACKETS); 158 159 #if defined(NFAITH) && 0 < NFAITH 160 if (faithprefix(&ip6->ip6_dst)) { 161 /* send icmp6 host unreach? */ 162 m_freem(m); 163 return IPPROTO_DONE; 164 } 165 #endif 166 167 /* Be proactive about malicious use of IPv4 mapped address */ 168 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 169 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 170 /* XXX stat */ 171 m_freem(m); 172 return IPPROTO_DONE; 173 } 174 175 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 176 if (sa6_recoverscope(&rip6src) != 0) { 177 /* XXX: should be impossible. */ 178 m_freem(m); 179 return IPPROTO_DONE; 180 } 181 182 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 183 in6p = (struct in6pcb *)inph; 184 if (in6p->in6p_af != AF_INET6) 185 continue; 186 if (in6p->in6p_ip6.ip6_nxt && 187 in6p->in6p_ip6.ip6_nxt != proto) 188 continue; 189 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 190 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 191 continue; 192 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 193 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 194 continue; 195 if (in6p->in6p_cksum != -1) { 196 RIP6_STATINC(RIP6_STAT_ISUM); 197 if (in6_cksum(m, proto, *offp, 198 m->m_pkthdr.len - *offp)) { 199 RIP6_STATINC(RIP6_STAT_BADSUM); 200 continue; 201 } 202 } 203 if (last) { 204 struct mbuf *n; 205 206 #ifdef IPSEC 207 /* 208 * Check AH/ESP integrity. 209 */ 210 if (ipsec6_in_reject(m, last)) { 211 IPSEC6_STATINC(IPSEC_STAT_IN_INVAL); 212 /* do not inject data into pcb */ 213 } else 214 #endif /* IPSEC */ 215 #ifdef FAST_IPSEC 216 /* 217 * Check AH/ESP integrity 218 */ 219 if (!ipsec6_in_reject(m,last)) 220 #endif /* FAST_IPSEC */ 221 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 222 if (last->in6p_flags & IN6P_CONTROLOPTS) 223 ip6_savecontrol(last, &opts, ip6, n); 224 /* strip intermediate headers */ 225 m_adj(n, *offp); 226 if (sbappendaddr(&last->in6p_socket->so_rcv, 227 (struct sockaddr *)&rip6src, n, opts) == 0) { 228 /* should notify about lost packet */ 229 m_freem(n); 230 if (opts) 231 m_freem(opts); 232 RIP6_STATINC(RIP6_STAT_FULLSOCK); 233 } else 234 sorwakeup(last->in6p_socket); 235 opts = NULL; 236 } 237 } 238 last = in6p; 239 } 240 #ifdef IPSEC 241 /* 242 * Check AH/ESP integrity. 243 */ 244 if (last && ipsec6_in_reject(m, last)) { 245 m_freem(m); 246 IPSEC6_STATINC(IPSEC_STAT_IN_INVAL); 247 IP6_STATDEC(IP6_STAT_DELIVERED); 248 /* do not inject data into pcb */ 249 } else 250 #endif /* IPSEC */ 251 #ifdef FAST_IPSEC 252 if (last && ipsec6_in_reject(m, last)) { 253 m_freem(m); 254 /* 255 * XXX ipsec6_in_reject update stat if there is an error 256 * so we just need to update stats by hand in the case of last is 257 * NULL 258 */ 259 if (!last) 260 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); 261 IP6_STATDEC(IP6_STAT_DELIVERED); 262 /* do not inject data into pcb */ 263 } else 264 #endif /* FAST_IPSEC */ 265 if (last) { 266 if (last->in6p_flags & IN6P_CONTROLOPTS) 267 ip6_savecontrol(last, &opts, ip6, m); 268 /* strip intermediate headers */ 269 m_adj(m, *offp); 270 if (sbappendaddr(&last->in6p_socket->so_rcv, 271 (struct sockaddr *)&rip6src, m, opts) == 0) { 272 m_freem(m); 273 if (opts) 274 m_freem(opts); 275 RIP6_STATINC(RIP6_STAT_FULLSOCK); 276 } else 277 sorwakeup(last->in6p_socket); 278 } else { 279 RIP6_STATINC(RIP6_STAT_NOSOCK); 280 if (m->m_flags & M_MCAST) 281 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 282 if (proto == IPPROTO_NONE) 283 m_freem(m); 284 else { 285 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 286 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 287 icmp6_error(m, ICMP6_PARAM_PROB, 288 ICMP6_PARAMPROB_NEXTHEADER, 289 prvnxtp - mtod(m, u_int8_t *)); 290 } 291 IP6_STATDEC(IP6_STAT_DELIVERED); 292 } 293 return IPPROTO_DONE; 294 } 295 296 void * 297 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 298 { 299 struct ip6_hdr *ip6; 300 struct ip6ctlparam *ip6cp = NULL; 301 const struct sockaddr_in6 *sa6_src = NULL; 302 void *cmdarg; 303 void (*notify)(struct in6pcb *, int) = in6_rtchange; 304 int nxt; 305 306 if (sa->sa_family != AF_INET6 || 307 sa->sa_len != sizeof(struct sockaddr_in6)) 308 return NULL; 309 310 if ((unsigned)cmd >= PRC_NCMDS) 311 return NULL; 312 if (PRC_IS_REDIRECT(cmd)) 313 notify = in6_rtchange, d = NULL; 314 else if (cmd == PRC_HOSTDEAD) 315 d = NULL; 316 else if (cmd == PRC_MSGSIZE) 317 ; /* special code is present, see below */ 318 else if (inet6ctlerrmap[cmd] == 0) 319 return NULL; 320 321 /* if the parameter is from icmp6, decode it. */ 322 if (d != NULL) { 323 ip6cp = (struct ip6ctlparam *)d; 324 ip6 = ip6cp->ip6c_ip6; 325 cmdarg = ip6cp->ip6c_cmdarg; 326 sa6_src = ip6cp->ip6c_src; 327 nxt = ip6cp->ip6c_nxt; 328 } else { 329 ip6 = NULL; 330 cmdarg = NULL; 331 sa6_src = &sa6_any; 332 nxt = -1; 333 } 334 335 if (ip6 && cmd == PRC_MSGSIZE) { 336 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 337 int valid = 0; 338 struct in6pcb *in6p; 339 340 /* 341 * Check to see if we have a valid raw IPv6 socket 342 * corresponding to the address in the ICMPv6 message 343 * payload, and the protocol (ip6_nxt) meets the socket. 344 * XXX chase extension headers, or pass final nxt value 345 * from icmp6_notify_error() 346 */ 347 in6p = NULL; 348 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 349 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 350 #if 0 351 if (!in6p) { 352 /* 353 * As the use of sendto(2) is fairly popular, 354 * we may want to allow non-connected pcb too. 355 * But it could be too weak against attacks... 356 * We should at least check if the local 357 * address (= s) is really ours. 358 */ 359 in6p = in6_pcblookup_bind(&raw6cbtable, 360 &sa6->sin6_addr, 0, 0); 361 } 362 #endif 363 364 if (in6p && in6p->in6p_ip6.ip6_nxt && 365 in6p->in6p_ip6.ip6_nxt == nxt) 366 valid++; 367 368 /* 369 * Depending on the value of "valid" and routing table 370 * size (mtudisc_{hi,lo}wat), we will: 371 * - recalculate the new MTU and create the 372 * corresponding routing entry, or 373 * - ignore the MTU change notification. 374 */ 375 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 376 377 /* 378 * regardless of if we called icmp6_mtudisc_update(), 379 * we need to call in6_pcbnotify(), to notify path MTU 380 * change to the userland (RFC3542), because some 381 * unconnected sockets may share the same destination 382 * and want to know the path MTU. 383 */ 384 } 385 386 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 387 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 388 return NULL; 389 } 390 391 /* 392 * Generate IPv6 header and pass packet to ip6_output. 393 * Tack on options user may have setup with control call. 394 */ 395 int 396 rip6_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *dstsock, 397 struct mbuf *control) 398 { 399 struct in6_addr *dst; 400 struct ip6_hdr *ip6; 401 struct in6pcb *in6p; 402 u_int plen = m->m_pkthdr.len; 403 int error = 0; 404 struct ip6_pktopts opt, *optp = NULL; 405 struct ifnet *oifp = NULL; 406 int type, code; /* for ICMPv6 output statistics only */ 407 int scope_ambiguous = 0; 408 struct in6_addr *in6a; 409 410 in6p = sotoin6pcb(so); 411 412 dst = &dstsock->sin6_addr; 413 if (control) { 414 if ((error = ip6_setpktopts(control, &opt, 415 in6p->in6p_outputopts, 416 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 417 goto bad; 418 } 419 optp = &opt; 420 } else 421 optp = in6p->in6p_outputopts; 422 423 /* 424 * Check and convert scope zone ID into internal form. 425 * XXX: we may still need to determine the zone later. 426 */ 427 if (!(so->so_state & SS_ISCONNECTED)) { 428 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 429 scope_ambiguous = 1; 430 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 431 goto bad; 432 } 433 434 /* 435 * For an ICMPv6 packet, we should know its type and code 436 * to update statistics. 437 */ 438 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 439 struct icmp6_hdr *icmp6; 440 if (m->m_len < sizeof(struct icmp6_hdr) && 441 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 442 error = ENOBUFS; 443 goto bad; 444 } 445 icmp6 = mtod(m, struct icmp6_hdr *); 446 type = icmp6->icmp6_type; 447 code = icmp6->icmp6_code; 448 } else { 449 type = 0; 450 code = 0; 451 } 452 453 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 454 if (!m) { 455 error = ENOBUFS; 456 goto bad; 457 } 458 ip6 = mtod(m, struct ip6_hdr *); 459 460 /* 461 * Next header might not be ICMP6 but use its pseudo header anyway. 462 */ 463 ip6->ip6_dst = *dst; 464 465 /* 466 * Source address selection. 467 */ 468 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 469 (struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp, 470 &error)) == 0) { 471 if (error == 0) 472 error = EADDRNOTAVAIL; 473 goto bad; 474 } 475 ip6->ip6_src = *in6a; 476 477 if (oifp && scope_ambiguous) { 478 /* 479 * Application should provide a proper zone ID or the use of 480 * default zone IDs should be enabled. Unfortunately, some 481 * applications do not behave as it should, so we need a 482 * workaround. Even if an appropriate ID is not determined 483 * (when it's required), if we can determine the outgoing 484 * interface. determine the zone ID based on the interface. 485 */ 486 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 487 if (error != 0) 488 goto bad; 489 } 490 ip6->ip6_dst = dstsock->sin6_addr; 491 492 /* fill in the rest of the IPv6 header fields */ 493 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 494 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 495 ip6->ip6_vfc |= IPV6_VERSION; 496 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 497 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 498 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 499 500 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 501 in6p->in6p_cksum != -1) { 502 int off; 503 u_int16_t sum; 504 505 /* compute checksum */ 506 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 507 off = offsetof(struct icmp6_hdr, icmp6_cksum); 508 else 509 off = in6p->in6p_cksum; 510 if (plen < off + 1) { 511 error = EINVAL; 512 goto bad; 513 } 514 off += sizeof(struct ip6_hdr); 515 516 sum = 0; 517 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 518 M_DONTWAIT); 519 if (m == NULL) { 520 error = ENOBUFS; 521 goto bad; 522 } 523 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 524 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 525 M_DONTWAIT); 526 if (m == NULL) { 527 error = ENOBUFS; 528 goto bad; 529 } 530 } 531 532 error = ip6_output(m, optp, &in6p->in6p_route, 0, 533 in6p->in6p_moptions, so, &oifp); 534 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 535 if (oifp) 536 icmp6_ifoutstat_inc(oifp, type, code); 537 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 538 } else 539 RIP6_STATINC(RIP6_STAT_OPACKETS); 540 541 goto freectl; 542 543 bad: 544 if (m) 545 m_freem(m); 546 547 freectl: 548 if (control) { 549 ip6_clearpktopts(&opt, -1); 550 m_freem(control); 551 } 552 return error; 553 } 554 555 /* 556 * Raw IPv6 socket option processing. 557 */ 558 int 559 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 560 { 561 int error = 0; 562 563 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 564 int optval; 565 566 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 567 if (op == PRCO_GETOPT) { 568 optval = 1; 569 error = sockopt_set(sopt, &optval, sizeof(optval)); 570 } else if (op == PRCO_SETOPT) { 571 error = sockopt_getint(sopt, &optval); 572 if (error) 573 goto out; 574 if (optval == 0) 575 error = EINVAL; 576 } 577 578 goto out; 579 } else if (sopt->sopt_level != IPPROTO_IPV6) 580 return ip6_ctloutput(op, so, sopt); 581 582 switch (sopt->sopt_name) { 583 case MRT6_INIT: 584 case MRT6_DONE: 585 case MRT6_ADD_MIF: 586 case MRT6_DEL_MIF: 587 case MRT6_ADD_MFC: 588 case MRT6_DEL_MFC: 589 case MRT6_PIM: 590 if (op == PRCO_SETOPT) 591 error = ip6_mrouter_set(so, sopt); 592 else if (op == PRCO_GETOPT) 593 error = ip6_mrouter_get(so, sopt); 594 else 595 error = EINVAL; 596 break; 597 case IPV6_CHECKSUM: 598 return ip6_raw_ctloutput(op, so, sopt); 599 default: 600 return ip6_ctloutput(op, so, sopt); 601 } 602 out: 603 return error; 604 } 605 606 extern u_long rip6_sendspace; 607 extern u_long rip6_recvspace; 608 609 int 610 rip6_usrreq(struct socket *so, int req, struct mbuf *m, 611 struct mbuf *nam, struct mbuf *control, struct lwp *l) 612 { 613 struct in6pcb *in6p = sotoin6pcb(so); 614 int s; 615 int error = 0; 616 617 if (req == PRU_CONTROL) 618 return in6_control(so, (u_long)m, (void *)nam, 619 (struct ifnet *)control, l); 620 621 if (req == PRU_PURGEIF) { 622 mutex_enter(softnet_lock); 623 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 624 in6_purgeif((struct ifnet *)control); 625 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 626 mutex_exit(softnet_lock); 627 return 0; 628 } 629 630 switch (req) { 631 case PRU_ATTACH: 632 error = kauth_authorize_network(l->l_cred, 633 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 634 NULL, NULL, NULL); 635 sosetlock(so); 636 if (in6p != NULL) 637 panic("rip6_attach"); 638 if (error) { 639 break; 640 } 641 s = splsoftnet(); 642 error = soreserve(so, rip6_sendspace, rip6_recvspace); 643 if (error != 0) { 644 splx(s); 645 break; 646 } 647 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 648 splx(s); 649 break; 650 } 651 splx(s); 652 in6p = sotoin6pcb(so); 653 in6p->in6p_ip6.ip6_nxt = (long)nam; 654 in6p->in6p_cksum = -1; 655 656 in6p->in6p_icmp6filt = malloc(sizeof(struct icmp6_filter), 657 M_PCB, M_NOWAIT); 658 if (in6p->in6p_icmp6filt == NULL) { 659 in6_pcbdetach(in6p); 660 error = ENOMEM; 661 break; 662 } 663 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 664 break; 665 666 case PRU_DISCONNECT: 667 if ((so->so_state & SS_ISCONNECTED) == 0) { 668 error = ENOTCONN; 669 break; 670 } 671 in6p->in6p_faddr = in6addr_any; 672 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 673 break; 674 675 case PRU_ABORT: 676 soisdisconnected(so); 677 /* Fallthrough */ 678 case PRU_DETACH: 679 if (in6p == NULL) 680 panic("rip6_detach"); 681 if (so == ip6_mrouter) 682 ip6_mrouter_done(); 683 /* xxx: RSVP */ 684 if (in6p->in6p_icmp6filt != NULL) { 685 free(in6p->in6p_icmp6filt, M_PCB); 686 in6p->in6p_icmp6filt = NULL; 687 } 688 in6_pcbdetach(in6p); 689 break; 690 691 case PRU_BIND: 692 { 693 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 694 struct ifaddr *ia = NULL; 695 696 if (nam->m_len != sizeof(*addr)) { 697 error = EINVAL; 698 break; 699 } 700 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 701 error = EADDRNOTAVAIL; 702 break; 703 } 704 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 705 break; 706 707 /* 708 * we don't support mapped address here, it would confuse 709 * users so reject it 710 */ 711 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 712 error = EADDRNOTAVAIL; 713 break; 714 } 715 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 716 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 717 error = EADDRNOTAVAIL; 718 break; 719 } 720 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 721 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 722 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 723 error = EADDRNOTAVAIL; 724 break; 725 } 726 in6p->in6p_laddr = addr->sin6_addr; 727 break; 728 } 729 730 case PRU_CONNECT: 731 { 732 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 733 struct in6_addr *in6a = NULL; 734 struct ifnet *ifp = NULL; 735 int scope_ambiguous = 0; 736 737 if (nam->m_len != sizeof(*addr)) { 738 error = EINVAL; 739 break; 740 } 741 if (TAILQ_EMPTY(&ifnet)) { 742 error = EADDRNOTAVAIL; 743 break; 744 } 745 if (addr->sin6_family != AF_INET6) { 746 error = EAFNOSUPPORT; 747 break; 748 } 749 750 /* 751 * Application should provide a proper zone ID or the use of 752 * default zone IDs should be enabled. Unfortunately, some 753 * applications do not behave as it should, so we need a 754 * workaround. Even if an appropriate ID is not determined, 755 * we'll see if we can determine the outgoing interface. If we 756 * can, determine the zone ID based on the interface below. 757 */ 758 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 759 scope_ambiguous = 1; 760 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 761 return error; 762 763 /* Source address selection. XXX: need pcblookup? */ 764 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 765 in6p->in6p_moptions, (struct route *)&in6p->in6p_route, 766 &in6p->in6p_laddr, &ifp, &error); 767 if (in6a == NULL) { 768 if (error == 0) 769 error = EADDRNOTAVAIL; 770 break; 771 } 772 /* XXX: see above */ 773 if (ifp && scope_ambiguous && 774 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 775 break; 776 } 777 in6p->in6p_laddr = *in6a; 778 in6p->in6p_faddr = addr->sin6_addr; 779 soisconnected(so); 780 break; 781 } 782 783 case PRU_CONNECT2: 784 error = EOPNOTSUPP; 785 break; 786 787 /* 788 * Mark the connection as being incapable of futther input. 789 */ 790 case PRU_SHUTDOWN: 791 socantsendmore(so); 792 break; 793 /* 794 * Ship a packet out. The appropriate raw output 795 * routine handles any messaging necessary. 796 */ 797 case PRU_SEND: 798 { 799 struct sockaddr_in6 tmp; 800 struct sockaddr_in6 *dst; 801 802 /* always copy sockaddr to avoid overwrites */ 803 if (so->so_state & SS_ISCONNECTED) { 804 if (nam) { 805 error = EISCONN; 806 break; 807 } 808 /* XXX */ 809 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 810 dst = &tmp; 811 } else { 812 if (nam == NULL) { 813 error = ENOTCONN; 814 break; 815 } 816 if (nam->m_len != sizeof(tmp)) { 817 error = EINVAL; 818 break; 819 } 820 821 tmp = *mtod(nam, struct sockaddr_in6 *); 822 dst = &tmp; 823 824 if (dst->sin6_family != AF_INET6) { 825 error = EAFNOSUPPORT; 826 break; 827 } 828 } 829 error = rip6_output(m, so, dst, control); 830 m = NULL; 831 break; 832 } 833 834 case PRU_SENSE: 835 /* 836 * stat: don't bother with a blocksize 837 */ 838 return 0; 839 /* 840 * Not supported. 841 */ 842 case PRU_RCVOOB: 843 case PRU_RCVD: 844 case PRU_LISTEN: 845 case PRU_ACCEPT: 846 case PRU_SENDOOB: 847 error = EOPNOTSUPP; 848 break; 849 850 case PRU_SOCKADDR: 851 in6_setsockaddr(in6p, nam); 852 break; 853 854 case PRU_PEERADDR: 855 in6_setpeeraddr(in6p, nam); 856 break; 857 858 default: 859 panic("rip6_usrreq"); 860 } 861 if (m != NULL) 862 m_freem(m); 863 return error; 864 } 865 866 static int 867 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 868 { 869 870 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 871 } 872 873 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 874 { 875 876 sysctl_createv(clog, 0, NULL, NULL, 877 CTLFLAG_PERMANENT, 878 CTLTYPE_NODE, "net", NULL, 879 NULL, 0, NULL, 0, 880 CTL_NET, CTL_EOL); 881 sysctl_createv(clog, 0, NULL, NULL, 882 CTLFLAG_PERMANENT, 883 CTLTYPE_NODE, "inet6", NULL, 884 NULL, 0, NULL, 0, 885 CTL_NET, PF_INET6, CTL_EOL); 886 sysctl_createv(clog, 0, NULL, NULL, 887 CTLFLAG_PERMANENT, 888 CTLTYPE_NODE, "raw6", 889 SYSCTL_DESCR("Raw IPv6 settings"), 890 NULL, 0, NULL, 0, 891 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 892 893 sysctl_createv(clog, 0, NULL, NULL, 894 CTLFLAG_PERMANENT, 895 CTLTYPE_STRUCT, "pcblist", 896 SYSCTL_DESCR("Raw IPv6 control block list"), 897 sysctl_inpcblist, 0, &raw6cbtable, 0, 898 CTL_NET, PF_INET6, IPPROTO_RAW, 899 CTL_CREATE, CTL_EOL); 900 sysctl_createv(clog, 0, NULL, NULL, 901 CTLFLAG_PERMANENT, 902 CTLTYPE_STRUCT, "stats", 903 SYSCTL_DESCR("Raw IPv6 statistics"), 904 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 905 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 906 CTL_EOL); 907 } 908
Indexes created Tue Sep 23 07:09:52 GMT 2025