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