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, inp->in6p_outputopts, 428 so->so_cred, inp->inp_ip_p); 429 NET_EPOCH_EXIT(et); 430 431 if (error != 0) { 432 goto bad; 433 } 434 optp = &opt; 435 } else 436 optp = inp->in6p_outputopts; 437 438 /* 439 * Check and convert scope zone ID into internal form. 440 * 441 * XXX: we may still need to determine the zone later. 442 */ 443 if (!(so->so_state & SS_ISCONNECTED)) { 444 if (!optp || !optp->ip6po_pktinfo || 445 !optp->ip6po_pktinfo->ipi6_ifindex) 446 use_defzone = V_ip6_use_defzone; 447 if (dstsock->sin6_scope_id == 0 && !use_defzone) 448 scope_ambiguous = 1; 449 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 450 goto bad; 451 } 452 453 /* 454 * For an ICMPv6 packet, we should know its type and code to update 455 * statistics. 456 */ 457 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 458 struct icmp6_hdr *icmp6; 459 if (m->m_len < sizeof(struct icmp6_hdr) && 460 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 461 error = ENOBUFS; 462 goto bad; 463 } 464 icmp6 = mtod(m, struct icmp6_hdr *); 465 type = icmp6->icmp6_type; 466 code = icmp6->icmp6_code; 467 } 468 469 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 470 if (m == NULL) { 471 error = ENOBUFS; 472 goto bad; 473 } 474 ip6 = mtod(m, struct ip6_hdr *); 475 476 #ifdef ROUTE_MPATH 477 if (CALC_FLOWID_OUTBOUND) { 478 uint32_t hash_type, hash_val; 479 480 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 481 &dstsock->sin6_addr, 0, 0, inp->inp_ip_p, &hash_type); 482 inp->inp_flowid = hash_val; 483 inp->inp_flowtype = hash_type; 484 } 485 #endif 486 /* 487 * Source address selection. 488 */ 489 NET_EPOCH_ENTER(et); 490 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 491 scope_ambiguous, &in6a, &hlim); 492 NET_EPOCH_EXIT(et); 493 494 if (error) 495 goto bad; 496 error = prison_check_ip6(inp->inp_cred, &in6a); 497 if (error != 0) 498 goto bad; 499 ip6->ip6_src = in6a; 500 501 ip6->ip6_dst = dstsock->sin6_addr; 502 503 /* 504 * Fill in the rest of the IPv6 header fields. 505 */ 506 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 507 (inp->inp_flow & IPV6_FLOWINFO_MASK); 508 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 509 (IPV6_VERSION & IPV6_VERSION_MASK); 510 511 /* 512 * ip6_plen will be filled in ip6_output, so not fill it here. 513 */ 514 ip6->ip6_nxt = inp->inp_ip_p; 515 ip6->ip6_hlim = hlim; 516 517 if (inp->inp_ip_p == IPPROTO_ICMPV6 || inp->in6p_cksum != -1) { 518 struct mbuf *n; 519 int off; 520 u_int16_t *p; 521 522 /* Compute checksum. */ 523 if (inp->inp_ip_p == IPPROTO_ICMPV6) 524 off = offsetof(struct icmp6_hdr, icmp6_cksum); 525 else 526 off = inp->in6p_cksum; 527 if (plen < off + 2) { 528 error = EINVAL; 529 goto bad; 530 } 531 off += sizeof(struct ip6_hdr); 532 533 n = m; 534 while (n && n->m_len <= off) { 535 off -= n->m_len; 536 n = n->m_next; 537 } 538 if (!n) 539 goto bad; 540 p = (u_int16_t *)(mtod(n, caddr_t) + off); 541 *p = 0; 542 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 543 } 544 545 /* 546 * Send RA/RS messages to user land for protection, before sending 547 * them to rtadvd/rtsol. 548 */ 549 if ((send_sendso_input_hook != NULL) && 550 inp->inp_ip_p == IPPROTO_ICMPV6) { 551 switch (type) { 552 case ND_ROUTER_ADVERT: 553 case ND_ROUTER_SOLICIT: 554 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 555 sizeof(unsigned short), M_NOWAIT); 556 if (mtag == NULL) 557 goto bad; 558 m_tag_prepend(m, mtag); 559 } 560 } 561 562 NET_EPOCH_ENTER(et); 563 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 564 NET_EPOCH_EXIT(et); 565 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 566 if (oifp) 567 icmp6_ifoutstat_inc(oifp, type, code); 568 ICMP6STAT_INC(icp6s_outhist[type]); 569 } else 570 RIP6STAT_INC(rip6s_opackets); 571 572 goto freectl; 573 574 bad: 575 if (m) 576 m_freem(m); 577 578 freectl: 579 if (control != NULL) { 580 ip6_clearpktopts(&opt, -1); 581 m_freem(control); 582 } 583 INP_WUNLOCK(inp); 584 return (error); 585 586 release: 587 if (control != NULL) 588 m_freem(control); 589 m_freem(m); 590 return (error); 591 } 592 593 /* 594 * Raw IPv6 socket option processing. 595 */ 596 int 597 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 598 { 599 struct inpcb *inp = sotoinpcb(so); 600 int error; 601 602 if (sopt->sopt_level == IPPROTO_ICMPV6) 603 /* 604 * XXX: is it better to call icmp6_ctloutput() directly 605 * from protosw? 606 */ 607 return (icmp6_ctloutput(so, sopt)); 608 else if (sopt->sopt_level != IPPROTO_IPV6) { 609 if (sopt->sopt_level == SOL_SOCKET && 610 sopt->sopt_name == SO_SETFIB) { 611 INP_WLOCK(inp); 612 inp->inp_inc.inc_fibnum = so->so_fibnum; 613 INP_WUNLOCK(inp); 614 return (0); 615 } 616 return (EINVAL); 617 } 618 619 error = 0; 620 621 switch (sopt->sopt_dir) { 622 case SOPT_GET: 623 switch (sopt->sopt_name) { 624 case MRT6_INIT: 625 case MRT6_DONE: 626 case MRT6_ADD_MIF: 627 case MRT6_DEL_MIF: 628 case MRT6_ADD_MFC: 629 case MRT6_DEL_MFC: 630 case MRT6_PIM: 631 if (inp->inp_ip_p != IPPROTO_ICMPV6) 632 return (EOPNOTSUPP); 633 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 634 EOPNOTSUPP; 635 break; 636 case IPV6_CHECKSUM: 637 error = ip6_raw_ctloutput(so, sopt); 638 break; 639 default: 640 error = ip6_ctloutput(so, sopt); 641 break; 642 } 643 break; 644 645 case SOPT_SET: 646 switch (sopt->sopt_name) { 647 case MRT6_INIT: 648 case MRT6_DONE: 649 case MRT6_ADD_MIF: 650 case MRT6_DEL_MIF: 651 case MRT6_ADD_MFC: 652 case MRT6_DEL_MFC: 653 case MRT6_PIM: 654 if (inp->inp_ip_p != IPPROTO_ICMPV6) 655 return (EOPNOTSUPP); 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 if (proto >= IPPROTO_MAX || proto < 0) 686 return (EPROTONOSUPPORT); 687 error = soreserve(so, rip_sendspace, rip_recvspace); 688 if (error) 689 return (error); 690 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 691 if (filter == NULL) 692 return (ENOMEM); 693 error = in_pcballoc(so, &V_ripcbinfo); 694 if (error) { 695 free(filter, M_PCB); 696 return (error); 697 } 698 inp = (struct inpcb *)so->so_pcb; 699 inp->inp_ip_p = proto; 700 inp->in6p_cksum = -1; 701 inp->in6p_icmp6filt = filter; 702 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 703 INP_WUNLOCK(inp); 704 return (0); 705 } 706 707 static void 708 rip6_detach(struct socket *so) 709 { 710 struct inpcb *inp; 711 712 inp = sotoinpcb(so); 713 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 714 715 if (so == V_ip6_mrouter && ip6_mrouter_done) 716 ip6_mrouter_done(); 717 /* xxx: RSVP */ 718 INP_WLOCK(inp); 719 free(inp->in6p_icmp6filt, M_PCB); 720 in_pcbdetach(inp); 721 in_pcbfree(inp); 722 } 723 724 /* XXXRW: This can't ever be called. */ 725 static void 726 rip6_abort(struct socket *so) 727 { 728 struct inpcb *inp __diagused; 729 730 inp = sotoinpcb(so); 731 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 732 733 soisdisconnected(so); 734 } 735 736 static void 737 rip6_close(struct socket *so) 738 { 739 struct inpcb *inp __diagused; 740 741 inp = sotoinpcb(so); 742 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 743 744 soisdisconnected(so); 745 } 746 747 static int 748 rip6_disconnect(struct socket *so) 749 { 750 struct inpcb *inp; 751 752 inp = sotoinpcb(so); 753 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 754 755 if ((so->so_state & SS_ISCONNECTED) == 0) 756 return (ENOTCONN); 757 inp->in6p_faddr = in6addr_any; 758 rip6_abort(so); 759 return (0); 760 } 761 762 static int 763 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 764 { 765 struct epoch_tracker et; 766 struct inpcb *inp; 767 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 768 struct ifaddr *ifa = NULL; 769 int error = 0; 770 771 inp = sotoinpcb(so); 772 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 773 774 if (nam->sa_family != AF_INET6) 775 return (EAFNOSUPPORT); 776 if (nam->sa_len != sizeof(*addr)) 777 return (EINVAL); 778 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 779 return (error); 780 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 781 return (EADDRNOTAVAIL); 782 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 783 return (error); 784 785 NET_EPOCH_ENTER(et); 786 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 787 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 788 NET_EPOCH_EXIT(et); 789 return (EADDRNOTAVAIL); 790 } 791 if (ifa != NULL && 792 ((struct in6_ifaddr *)ifa)->ia6_flags & 793 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 794 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 795 NET_EPOCH_EXIT(et); 796 return (EADDRNOTAVAIL); 797 } 798 NET_EPOCH_EXIT(et); 799 INP_WLOCK(inp); 800 INP_INFO_WLOCK(&V_ripcbinfo); 801 inp->in6p_laddr = addr->sin6_addr; 802 INP_INFO_WUNLOCK(&V_ripcbinfo); 803 INP_WUNLOCK(inp); 804 return (0); 805 } 806 807 static int 808 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 809 { 810 struct inpcb *inp; 811 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 812 struct in6_addr in6a; 813 struct epoch_tracker et; 814 int error = 0, scope_ambiguous = 0; 815 816 inp = sotoinpcb(so); 817 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 818 819 if (nam->sa_len != sizeof(*addr)) 820 return (EINVAL); 821 if (CK_STAILQ_EMPTY(&V_ifnet)) 822 return (EADDRNOTAVAIL); 823 if (addr->sin6_family != AF_INET6) 824 return (EAFNOSUPPORT); 825 826 /* 827 * Application should provide a proper zone ID or the use of default 828 * zone IDs should be enabled. Unfortunately, some applications do 829 * not behave as it should, so we need a workaround. Even if an 830 * appropriate ID is not determined, we'll see if we can determine 831 * the outgoing interface. If we can, determine the zone ID based on 832 * the interface below. 833 */ 834 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 835 scope_ambiguous = 1; 836 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 837 return (error); 838 839 INP_WLOCK(inp); 840 INP_INFO_WLOCK(&V_ripcbinfo); 841 /* Source address selection. XXX: need pcblookup? */ 842 NET_EPOCH_ENTER(et); 843 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 844 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 845 NET_EPOCH_EXIT(et); 846 if (error) { 847 INP_INFO_WUNLOCK(&V_ripcbinfo); 848 INP_WUNLOCK(inp); 849 return (error); 850 } 851 852 inp->in6p_faddr = addr->sin6_addr; 853 inp->in6p_laddr = in6a; 854 soisconnected(so); 855 INP_INFO_WUNLOCK(&V_ripcbinfo); 856 INP_WUNLOCK(inp); 857 return (0); 858 } 859 860 static int 861 rip6_shutdown(struct socket *so) 862 { 863 struct inpcb *inp; 864 865 inp = sotoinpcb(so); 866 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 867 868 INP_WLOCK(inp); 869 socantsendmore(so); 870 INP_WUNLOCK(inp); 871 return (0); 872 } 873 874 struct protosw rip6_protosw = { 875 .pr_type = SOCK_RAW, 876 .pr_flags = PR_ATOMIC|PR_ADDR, 877 .pr_ctloutput = rip6_ctloutput, 878 .pr_abort = rip6_abort, 879 .pr_attach = rip6_attach, 880 .pr_bind = rip6_bind, 881 .pr_connect = rip6_connect, 882 .pr_control = in6_control, 883 .pr_detach = rip6_detach, 884 .pr_disconnect = rip6_disconnect, 885 .pr_peeraddr = in6_getpeeraddr, 886 .pr_send = rip6_send, 887 .pr_shutdown = rip6_shutdown, 888 .pr_sockaddr = in6_getsockaddr, 889 .pr_close = rip6_close 890 }; 891