1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. 35 * 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 __FBSDID("$FreeBSD$"); 66 67 #include "opt_ipsec.h" 68 #include "opt_inet6.h" 69 #include "opt_route.h" 70 71 #include <sys/param.h> 72 #include <sys/errno.h> 73 #include <sys/jail.h> 74 #include <sys/kernel.h> 75 #include <sys/lock.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/priv.h> 79 #include <sys/proc.h> 80 #include <sys/protosw.h> 81 #include <sys/signalvar.h> 82 #include <sys/socket.h> 83 #include <sys/socketvar.h> 84 #include <sys/sx.h> 85 #include <sys/syslog.h> 86 87 #include <net/if.h> 88 #include <net/if_var.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 #include <net/vnet.h> 92 93 #include <netinet/in.h> 94 #include <netinet/in_var.h> 95 #include <netinet/in_systm.h> 96 #include <netinet/in_pcb.h> 97 98 #include <netinet/icmp6.h> 99 #include <netinet/ip6.h> 100 #include <netinet/ip_var.h> 101 #include <netinet6/ip6protosw.h> 102 #include <netinet6/ip6_mroute.h> 103 #include <netinet6/in6_pcb.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet6/nd6.h> 106 #include <netinet6/raw_ip6.h> 107 #include <netinet6/in6_fib.h> 108 #include <netinet6/scope6_var.h> 109 #include <netinet6/send.h> 110 111 #include <netipsec/ipsec_support.h> 112 113 #include <machine/stdarg.h> 114 115 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 117 118 /* 119 * Raw interface to IP6 protocol. 120 */ 121 122 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 123 #define V_ripcbinfo VNET(ripcbinfo) 124 125 extern u_long rip_sendspace; 126 extern u_long rip_recvspace; 127 128 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 129 VNET_PCPUSTAT_SYSINIT(rip6stat); 130 131 #ifdef VIMAGE 132 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 133 #endif /* VIMAGE */ 134 135 /* 136 * Hooks for multicast routing. They all default to NULL, so leave them not 137 * initialized and rely on BSS being set to 0. 138 */ 139 140 /* 141 * The socket used to communicate with the multicast routing daemon. 142 */ 143 VNET_DEFINE(struct socket *, ip6_mrouter); 144 145 /* 146 * The various mrouter functions. 147 */ 148 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 149 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 150 int (*ip6_mrouter_done)(void); 151 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 152 int (*mrt6_ioctl)(u_long, caddr_t); 153 154 struct rip6_inp_match_ctx { 155 struct ip6_hdr *ip6; 156 int proto; 157 }; 158 159 static bool 160 rip6_inp_match(const struct inpcb *inp, void *v) 161 { 162 struct rip6_inp_match_ctx *c = v; 163 struct ip6_hdr *ip6 = c->ip6; 164 int proto = c->proto; 165 166 /* XXX inp locking */ 167 if ((inp->inp_vflag & INP_IPV6) == 0) 168 return (false); 169 if (inp->inp_ip_p && inp->inp_ip_p != proto) 170 return (false); 171 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 172 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 173 return (false); 174 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 175 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 176 return (false); 177 178 return (true); 179 } 180 181 /* 182 * Setup generic address and protocol structures for raw_input routine, then 183 * pass them along with mbuf chain. 184 */ 185 int 186 rip6_input(struct mbuf **mp, int *offp, int proto) 187 { 188 struct ifnet *ifp; 189 struct mbuf *n, *m = *mp; 190 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 191 struct inpcb *inp; 192 struct mbuf *opts = NULL; 193 struct sockaddr_in6 fromsa; 194 struct rip6_inp_match_ctx ctx = { .ip6 = ip6, .proto = proto }; 195 struct inpcb_iterator inpi = INP_ITERATOR(&V_ripcbinfo, 196 INPLOOKUP_RLOCKPCB, rip6_inp_match, &ctx); 197 int delivered = 0; 198 199 NET_EPOCH_ASSERT(); 200 201 RIP6STAT_INC(rip6s_ipackets); 202 203 init_sin6(&fromsa, m, 0); /* general init */ 204 205 ifp = m->m_pkthdr.rcvif; 206 207 while ((inp = inp_next(&inpi)) != NULL) { 208 INP_RLOCK_ASSERT(inp); 209 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 210 /* 211 * Check AH/ESP integrity. 212 */ 213 if (IPSEC_ENABLED(ipv6) && 214 IPSEC_CHECK_POLICY(ipv6, m, inp) != 0) { 215 /* Do not inject data into pcb. */ 216 continue; 217 } 218 #endif /* IPSEC */ 219 if (jailed_without_vnet(inp->inp_cred) && 220 !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 221 prison_check_ip6(inp->inp_cred, &ip6->ip6_dst) != 0) 222 /* 223 * Allow raw socket in jail to receive multicast; 224 * assume process had PRIV_NETINET_RAW at attach, 225 * and fall through into normal filter path if so. 226 */ 227 continue; 228 if (inp->in6p_cksum != -1) { 229 RIP6STAT_INC(rip6s_isum); 230 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 || 231 in6_cksum(m, proto, *offp, 232 m->m_pkthdr.len - *offp)) { 233 RIP6STAT_INC(rip6s_badsum); 234 /* 235 * Drop the received message, don't send an 236 * ICMP6 message. Set proto to IPPROTO_NONE 237 * to achieve that. 238 */ 239 INP_RUNLOCK(inp); 240 proto = IPPROTO_NONE; 241 break; 242 } 243 } 244 /* 245 * If this raw socket has multicast state, and we 246 * have received a multicast, check if this socket 247 * should receive it, as multicast filtering is now 248 * the responsibility of the transport layer. 249 */ 250 if (inp->in6p_moptions && 251 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 252 /* 253 * If the incoming datagram is for MLD, allow it 254 * through unconditionally to the raw socket. 255 * 256 * Use the M_RTALERT_MLD flag to check for MLD 257 * traffic without having to inspect the mbuf chain 258 * more deeply, as all MLDv1/v2 host messages MUST 259 * contain the Router Alert option. 260 * 261 * In the case of MLDv1, we may not have explicitly 262 * joined the group, and may have set IFF_ALLMULTI 263 * on the interface. im6o_mc_filter() may discard 264 * control traffic we actually need to see. 265 * 266 * Userland multicast routing daemons should continue 267 * filter the control traffic appropriately. 268 */ 269 int blocked; 270 271 blocked = MCAST_PASS; 272 if ((m->m_flags & M_RTALERT_MLD) == 0) { 273 struct sockaddr_in6 mcaddr; 274 275 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 276 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 277 mcaddr.sin6_family = AF_INET6; 278 mcaddr.sin6_addr = ip6->ip6_dst; 279 280 blocked = im6o_mc_filter(inp->in6p_moptions, 281 ifp, 282 (struct sockaddr *)&mcaddr, 283 (struct sockaddr *)&fromsa); 284 } 285 if (blocked != MCAST_PASS) { 286 IP6STAT_INC(ip6s_notmember); 287 continue; 288 } 289 } 290 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) 291 continue; 292 if (inp->inp_flags & INP_CONTROLOPTS || 293 inp->inp_socket->so_options & SO_TIMESTAMP) 294 ip6_savecontrol(inp, n, &opts); 295 /* strip intermediate headers */ 296 m_adj(n, *offp); 297 if (sbappendaddr(&inp->inp_socket->so_rcv, 298 (struct sockaddr *)&fromsa, n, opts) == 0) { 299 soroverflow(inp->inp_socket); 300 m_freem(n); 301 if (opts) 302 m_freem(opts); 303 RIP6STAT_INC(rip6s_fullsock); 304 } else { 305 sorwakeup(inp->inp_socket); 306 delivered++; 307 } 308 opts = NULL; 309 } 310 if (delivered == 0) { 311 RIP6STAT_INC(rip6s_nosock); 312 if (m->m_flags & M_MCAST) 313 RIP6STAT_INC(rip6s_nosockmcast); 314 if (proto == IPPROTO_NONE) 315 m_freem(m); 316 else 317 icmp6_error(m, ICMP6_PARAM_PROB, 318 ICMP6_PARAMPROB_NEXTHEADER, 319 ip6_get_prevhdr(m, *offp)); 320 IP6STAT_DEC(ip6s_delivered); 321 } else 322 m_freem(m); 323 return (IPPROTO_DONE); 324 } 325 326 void 327 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 328 { 329 struct ip6ctlparam *ip6cp = NULL; 330 const struct sockaddr_in6 *sa6_src = NULL; 331 void *cmdarg; 332 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 333 334 if (sa->sa_family != AF_INET6 || 335 sa->sa_len != sizeof(struct sockaddr_in6)) 336 return; 337 338 if ((unsigned)cmd >= PRC_NCMDS) 339 return; 340 if (PRC_IS_REDIRECT(cmd)) 341 notify = in6_rtchange, d = NULL; 342 else if (cmd == PRC_HOSTDEAD) 343 d = NULL; 344 else if (inet6ctlerrmap[cmd] == 0) 345 return; 346 347 /* 348 * If the parameter is from icmp6, decode it. 349 */ 350 if (d != NULL) { 351 ip6cp = (struct ip6ctlparam *)d; 352 cmdarg = ip6cp->ip6c_cmdarg; 353 sa6_src = ip6cp->ip6c_src; 354 } else { 355 cmdarg = NULL; 356 sa6_src = &sa6_any; 357 } 358 359 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 360 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 361 } 362 363 /* 364 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 365 * may have setup with control call. 366 */ 367 static int 368 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 369 struct mbuf *control, struct thread *td) 370 { 371 struct epoch_tracker et; 372 struct inpcb *inp; 373 struct sockaddr_in6 tmp, *dstsock; 374 struct m_tag *mtag; 375 struct ip6_hdr *ip6; 376 u_int plen = m->m_pkthdr.len; 377 struct ip6_pktopts opt, *optp; 378 struct ifnet *oifp = NULL; 379 int error; 380 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 381 int scope_ambiguous = 0; 382 int use_defzone = 0; 383 int hlim = 0; 384 struct in6_addr in6a; 385 386 inp = sotoinpcb(so); 387 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 388 389 /* Always copy sockaddr to avoid overwrites. */ 390 /* Unlocked read. */ 391 if (so->so_state & SS_ISCONNECTED) { 392 if (nam) { 393 error = EISCONN; 394 goto release; 395 } 396 tmp = (struct sockaddr_in6 ){ 397 .sin6_family = AF_INET6, 398 .sin6_len = sizeof(struct sockaddr_in6), 399 }; 400 INP_RLOCK(inp); 401 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 402 sizeof(struct in6_addr)); 403 INP_RUNLOCK(inp); 404 dstsock = &tmp; 405 } else { 406 if (nam == NULL) 407 error = ENOTCONN; 408 else if (nam->sa_family != AF_INET6) 409 error = EAFNOSUPPORT; 410 else if (nam->sa_len != sizeof(struct sockaddr_in6)) 411 error = EINVAL; 412 else 413 error = 0; 414 if (error != 0) 415 goto release; 416 dstsock = (struct sockaddr_in6 *)nam; 417 if (dstsock->sin6_family != AF_INET6) { 418 error = EAFNOSUPPORT; 419 goto release; 420 } 421 } 422 423 INP_WLOCK(inp); 424 425 if (control != NULL) { 426 NET_EPOCH_ENTER(et); 427 error = ip6_setpktopts(control, &opt, 428 inp->in6p_outputopts, so->so_cred, 429 so->so_proto->pr_protocol); 430 NET_EPOCH_EXIT(et); 431 432 if (error != 0) { 433 goto bad; 434 } 435 optp = &opt; 436 } else 437 optp = inp->in6p_outputopts; 438 439 /* 440 * Check and convert scope zone ID into internal form. 441 * 442 * XXX: we may still need to determine the zone later. 443 */ 444 if (!(so->so_state & SS_ISCONNECTED)) { 445 if (!optp || !optp->ip6po_pktinfo || 446 !optp->ip6po_pktinfo->ipi6_ifindex) 447 use_defzone = V_ip6_use_defzone; 448 if (dstsock->sin6_scope_id == 0 && !use_defzone) 449 scope_ambiguous = 1; 450 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 451 goto bad; 452 } 453 454 /* 455 * For an ICMPv6 packet, we should know its type and code to update 456 * statistics. 457 */ 458 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 459 struct icmp6_hdr *icmp6; 460 if (m->m_len < sizeof(struct icmp6_hdr) && 461 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 462 error = ENOBUFS; 463 goto bad; 464 } 465 icmp6 = mtod(m, struct icmp6_hdr *); 466 type = icmp6->icmp6_type; 467 code = icmp6->icmp6_code; 468 } 469 470 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 471 if (m == NULL) { 472 error = ENOBUFS; 473 goto bad; 474 } 475 ip6 = mtod(m, struct ip6_hdr *); 476 477 #ifdef ROUTE_MPATH 478 if (CALC_FLOWID_OUTBOUND) { 479 uint32_t hash_type, hash_val; 480 481 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 482 &dstsock->sin6_addr, 0, 0, so->so_proto->pr_protocol, 483 &hash_type); 484 inp->inp_flowid = hash_val; 485 inp->inp_flowtype = hash_type; 486 } 487 #endif 488 /* 489 * Source address selection. 490 */ 491 NET_EPOCH_ENTER(et); 492 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 493 scope_ambiguous, &in6a, &hlim); 494 NET_EPOCH_EXIT(et); 495 496 if (error) 497 goto bad; 498 error = prison_check_ip6(inp->inp_cred, &in6a); 499 if (error != 0) 500 goto bad; 501 ip6->ip6_src = in6a; 502 503 ip6->ip6_dst = dstsock->sin6_addr; 504 505 /* 506 * Fill in the rest of the IPv6 header fields. 507 */ 508 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 509 (inp->inp_flow & IPV6_FLOWINFO_MASK); 510 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 511 (IPV6_VERSION & IPV6_VERSION_MASK); 512 513 /* 514 * ip6_plen will be filled in ip6_output, so not fill it here. 515 */ 516 ip6->ip6_nxt = inp->inp_ip_p; 517 ip6->ip6_hlim = hlim; 518 519 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 520 inp->in6p_cksum != -1) { 521 struct mbuf *n; 522 int off; 523 u_int16_t *p; 524 525 /* Compute checksum. */ 526 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 527 off = offsetof(struct icmp6_hdr, icmp6_cksum); 528 else 529 off = inp->in6p_cksum; 530 if (plen < off + 2) { 531 error = EINVAL; 532 goto bad; 533 } 534 off += sizeof(struct ip6_hdr); 535 536 n = m; 537 while (n && n->m_len <= off) { 538 off -= n->m_len; 539 n = n->m_next; 540 } 541 if (!n) 542 goto bad; 543 p = (u_int16_t *)(mtod(n, caddr_t) + off); 544 *p = 0; 545 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 546 } 547 548 /* 549 * Send RA/RS messages to user land for protection, before sending 550 * them to rtadvd/rtsol. 551 */ 552 if ((send_sendso_input_hook != NULL) && 553 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 554 switch (type) { 555 case ND_ROUTER_ADVERT: 556 case ND_ROUTER_SOLICIT: 557 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 558 sizeof(unsigned short), M_NOWAIT); 559 if (mtag == NULL) 560 goto bad; 561 m_tag_prepend(m, mtag); 562 } 563 } 564 565 NET_EPOCH_ENTER(et); 566 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 567 NET_EPOCH_EXIT(et); 568 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 569 if (oifp) 570 icmp6_ifoutstat_inc(oifp, type, code); 571 ICMP6STAT_INC(icp6s_outhist[type]); 572 } else 573 RIP6STAT_INC(rip6s_opackets); 574 575 goto freectl; 576 577 bad: 578 if (m) 579 m_freem(m); 580 581 freectl: 582 if (control != NULL) { 583 ip6_clearpktopts(&opt, -1); 584 m_freem(control); 585 } 586 INP_WUNLOCK(inp); 587 return (error); 588 589 release: 590 if (control != NULL) 591 m_freem(control); 592 m_freem(m); 593 return (error); 594 } 595 596 /* 597 * Raw IPv6 socket option processing. 598 */ 599 int 600 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 601 { 602 struct inpcb *inp; 603 int error; 604 605 if (sopt->sopt_level == IPPROTO_ICMPV6) 606 /* 607 * XXX: is it better to call icmp6_ctloutput() directly 608 * from protosw? 609 */ 610 return (icmp6_ctloutput(so, sopt)); 611 else if (sopt->sopt_level != IPPROTO_IPV6) { 612 if (sopt->sopt_level == SOL_SOCKET && 613 sopt->sopt_name == SO_SETFIB) { 614 inp = sotoinpcb(so); 615 INP_WLOCK(inp); 616 inp->inp_inc.inc_fibnum = so->so_fibnum; 617 INP_WUNLOCK(inp); 618 return (0); 619 } 620 return (EINVAL); 621 } 622 623 error = 0; 624 625 switch (sopt->sopt_dir) { 626 case SOPT_GET: 627 switch (sopt->sopt_name) { 628 case MRT6_INIT: 629 case MRT6_DONE: 630 case MRT6_ADD_MIF: 631 case MRT6_DEL_MIF: 632 case MRT6_ADD_MFC: 633 case MRT6_DEL_MFC: 634 case MRT6_PIM: 635 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 636 EOPNOTSUPP; 637 break; 638 case IPV6_CHECKSUM: 639 error = ip6_raw_ctloutput(so, sopt); 640 break; 641 default: 642 error = ip6_ctloutput(so, sopt); 643 break; 644 } 645 break; 646 647 case SOPT_SET: 648 switch (sopt->sopt_name) { 649 case MRT6_INIT: 650 case MRT6_DONE: 651 case MRT6_ADD_MIF: 652 case MRT6_DEL_MIF: 653 case MRT6_ADD_MFC: 654 case MRT6_DEL_MFC: 655 case MRT6_PIM: 656 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 657 EOPNOTSUPP; 658 break; 659 case IPV6_CHECKSUM: 660 error = ip6_raw_ctloutput(so, sopt); 661 break; 662 default: 663 error = ip6_ctloutput(so, sopt); 664 break; 665 } 666 break; 667 } 668 669 return (error); 670 } 671 672 static int 673 rip6_attach(struct socket *so, int proto, struct thread *td) 674 { 675 struct inpcb *inp; 676 struct icmp6_filter *filter; 677 int error; 678 679 inp = sotoinpcb(so); 680 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 681 682 error = priv_check(td, PRIV_NETINET_RAW); 683 if (error) 684 return (error); 685 error = soreserve(so, rip_sendspace, rip_recvspace); 686 if (error) 687 return (error); 688 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 689 if (filter == NULL) 690 return (ENOMEM); 691 error = in_pcballoc(so, &V_ripcbinfo); 692 if (error) { 693 free(filter, M_PCB); 694 return (error); 695 } 696 inp = (struct inpcb *)so->so_pcb; 697 inp->inp_ip_p = (long)proto; 698 inp->in6p_cksum = -1; 699 inp->in6p_icmp6filt = filter; 700 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 701 INP_WUNLOCK(inp); 702 return (0); 703 } 704 705 static void 706 rip6_detach(struct socket *so) 707 { 708 struct inpcb *inp; 709 710 inp = sotoinpcb(so); 711 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 712 713 if (so == V_ip6_mrouter && ip6_mrouter_done) 714 ip6_mrouter_done(); 715 /* xxx: RSVP */ 716 INP_WLOCK(inp); 717 free(inp->in6p_icmp6filt, M_PCB); 718 in_pcbdetach(inp); 719 in_pcbfree(inp); 720 } 721 722 /* XXXRW: This can't ever be called. */ 723 static void 724 rip6_abort(struct socket *so) 725 { 726 struct inpcb *inp __diagused; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 730 731 soisdisconnected(so); 732 } 733 734 static void 735 rip6_close(struct socket *so) 736 { 737 struct inpcb *inp __diagused; 738 739 inp = sotoinpcb(so); 740 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 741 742 soisdisconnected(so); 743 } 744 745 static int 746 rip6_disconnect(struct socket *so) 747 { 748 struct inpcb *inp; 749 750 inp = sotoinpcb(so); 751 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 752 753 if ((so->so_state & SS_ISCONNECTED) == 0) 754 return (ENOTCONN); 755 inp->in6p_faddr = in6addr_any; 756 rip6_abort(so); 757 return (0); 758 } 759 760 static int 761 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 762 { 763 struct epoch_tracker et; 764 struct inpcb *inp; 765 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 766 struct ifaddr *ifa = NULL; 767 int error = 0; 768 769 inp = sotoinpcb(so); 770 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 771 772 if (nam->sa_family != AF_INET6) 773 return (EAFNOSUPPORT); 774 if (nam->sa_len != sizeof(*addr)) 775 return (EINVAL); 776 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 777 return (error); 778 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 779 return (EADDRNOTAVAIL); 780 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 781 return (error); 782 783 NET_EPOCH_ENTER(et); 784 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 785 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 786 NET_EPOCH_EXIT(et); 787 return (EADDRNOTAVAIL); 788 } 789 if (ifa != NULL && 790 ((struct in6_ifaddr *)ifa)->ia6_flags & 791 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 792 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 793 NET_EPOCH_EXIT(et); 794 return (EADDRNOTAVAIL); 795 } 796 NET_EPOCH_EXIT(et); 797 INP_WLOCK(inp); 798 INP_INFO_WLOCK(&V_ripcbinfo); 799 inp->in6p_laddr = addr->sin6_addr; 800 INP_INFO_WUNLOCK(&V_ripcbinfo); 801 INP_WUNLOCK(inp); 802 return (0); 803 } 804 805 static int 806 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 807 { 808 struct inpcb *inp; 809 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 810 struct in6_addr in6a; 811 struct epoch_tracker et; 812 int error = 0, scope_ambiguous = 0; 813 814 inp = sotoinpcb(so); 815 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 816 817 if (nam->sa_len != sizeof(*addr)) 818 return (EINVAL); 819 if (CK_STAILQ_EMPTY(&V_ifnet)) 820 return (EADDRNOTAVAIL); 821 if (addr->sin6_family != AF_INET6) 822 return (EAFNOSUPPORT); 823 824 /* 825 * Application should provide a proper zone ID or the use of default 826 * zone IDs should be enabled. Unfortunately, some applications do 827 * not behave as it should, so we need a workaround. Even if an 828 * appropriate ID is not determined, we'll see if we can determine 829 * the outgoing interface. If we can, determine the zone ID based on 830 * the interface below. 831 */ 832 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 833 scope_ambiguous = 1; 834 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 835 return (error); 836 837 INP_WLOCK(inp); 838 INP_INFO_WLOCK(&V_ripcbinfo); 839 /* Source address selection. XXX: need pcblookup? */ 840 NET_EPOCH_ENTER(et); 841 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 842 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 843 NET_EPOCH_EXIT(et); 844 if (error) { 845 INP_INFO_WUNLOCK(&V_ripcbinfo); 846 INP_WUNLOCK(inp); 847 return (error); 848 } 849 850 inp->in6p_faddr = addr->sin6_addr; 851 inp->in6p_laddr = in6a; 852 soisconnected(so); 853 INP_INFO_WUNLOCK(&V_ripcbinfo); 854 INP_WUNLOCK(inp); 855 return (0); 856 } 857 858 static int 859 rip6_shutdown(struct socket *so) 860 { 861 struct inpcb *inp; 862 863 inp = sotoinpcb(so); 864 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 865 866 INP_WLOCK(inp); 867 socantsendmore(so); 868 INP_WUNLOCK(inp); 869 return (0); 870 } 871 872 /* 873 * See comment in in6_proto.c containing "protosw definitions are not needed". 874 */ 875 #define RAW6_PROTOSW \ 876 .pr_type = SOCK_RAW, \ 877 .pr_flags = PR_ATOMIC|PR_ADDR, \ 878 .pr_ctloutput = rip6_ctloutput, \ 879 .pr_abort = rip6_abort, \ 880 .pr_attach = rip6_attach, \ 881 .pr_bind = rip6_bind, \ 882 .pr_connect = rip6_connect, \ 883 .pr_control = in6_control, \ 884 .pr_detach = rip6_detach, \ 885 .pr_disconnect = rip6_disconnect, \ 886 .pr_peeraddr = in6_getpeeraddr, \ 887 .pr_send = rip6_send, \ 888 .pr_shutdown = rip6_shutdown, \ 889 .pr_sockaddr = in6_getsockaddr, \ 890 .pr_close = rip6_close 891 892 struct protosw rip6_protosw = { 893 .pr_protocol = IPPROTO_RAW, 894 RAW6_PROTOSW 895 }; 896 struct protosw icmp6_protosw = { 897 .pr_protocol = IPPROTO_ICMPV6, 898 RAW6_PROTOSW 899 }; 900 struct protosw dstopts6_protosw = { 901 .pr_protocol = IPPROTO_DSTOPTS, 902 RAW6_PROTOSW 903 }; 904 struct protosw routing6_protosw = { 905 .pr_protocol = IPPROTO_ROUTING, 906 RAW6_PROTOSW 907 }; 908 struct protosw frag6_protosw = { 909 .pr_protocol = IPPROTO_FRAGMENT, 910 RAW6_PROTOSW 911 }; 912 struct protosw rawipv4in6_protosw = { 913 .pr_protocol = IPPROTO_IPV4, 914 RAW6_PROTOSW 915 }; 916 struct protosw rawipv6in6_protosw = { 917 .pr_protocol = IPPROTO_IPV6, 918 RAW6_PROTOSW 919 }; 920 struct protosw etherip6_protosw = { 921 .pr_protocol = IPPROTO_ETHERIP, 922 RAW6_PROTOSW 923 }; 924 struct protosw gre6_protosw = { 925 .pr_protocol = IPPROTO_GRE, 926 RAW6_PROTOSW 927 }; 928 struct protosw pim6_protosw = { 929 .pr_protocol = IPPROTO_PIM, 930 RAW6_PROTOSW 931 }; 932 struct protosw rip6wild_protosw = { 933 RAW6_PROTOSW 934 }; 935