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_private.h> 90 #include <net/if_types.h> 91 #include <net/route.h> 92 #include <net/vnet.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_var.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/in_pcb.h> 98 99 #include <netinet/icmp6.h> 100 #include <netinet/ip6.h> 101 #include <netinet/ip_var.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(struct ip6ctlparam *ip6cp) 328 { 329 int errno; 330 331 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) != 0) 332 in6_pcbnotify(&V_ripcbinfo, ip6cp->ip6c_finaldst, 0, 333 ip6cp->ip6c_src, 0, errno, ip6cp->ip6c_cmdarg, 334 in6_rtchange); 335 } 336 337 /* 338 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 339 * may have setup with control call. 340 */ 341 static int 342 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 343 struct mbuf *control, struct thread *td) 344 { 345 struct epoch_tracker et; 346 struct inpcb *inp; 347 struct sockaddr_in6 tmp, *dstsock; 348 struct m_tag *mtag; 349 struct ip6_hdr *ip6; 350 u_int plen = m->m_pkthdr.len; 351 struct ip6_pktopts opt, *optp; 352 struct ifnet *oifp = NULL; 353 int error; 354 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 355 int scope_ambiguous = 0; 356 int use_defzone = 0; 357 int hlim = 0; 358 struct in6_addr in6a; 359 360 inp = sotoinpcb(so); 361 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 362 363 /* Always copy sockaddr to avoid overwrites. */ 364 /* Unlocked read. */ 365 if (so->so_state & SS_ISCONNECTED) { 366 if (nam) { 367 error = EISCONN; 368 goto release; 369 } 370 tmp = (struct sockaddr_in6 ){ 371 .sin6_family = AF_INET6, 372 .sin6_len = sizeof(struct sockaddr_in6), 373 }; 374 INP_RLOCK(inp); 375 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 376 sizeof(struct in6_addr)); 377 INP_RUNLOCK(inp); 378 dstsock = &tmp; 379 } else { 380 if (nam == NULL) 381 error = ENOTCONN; 382 else if (nam->sa_family != AF_INET6) 383 error = EAFNOSUPPORT; 384 else if (nam->sa_len != sizeof(struct sockaddr_in6)) 385 error = EINVAL; 386 else 387 error = 0; 388 if (error != 0) 389 goto release; 390 dstsock = (struct sockaddr_in6 *)nam; 391 if (dstsock->sin6_family != AF_INET6) { 392 error = EAFNOSUPPORT; 393 goto release; 394 } 395 } 396 397 INP_WLOCK(inp); 398 399 if (control != NULL) { 400 NET_EPOCH_ENTER(et); 401 error = ip6_setpktopts(control, &opt, inp->in6p_outputopts, 402 so->so_cred, inp->inp_ip_p); 403 NET_EPOCH_EXIT(et); 404 405 if (error != 0) { 406 goto bad; 407 } 408 optp = &opt; 409 } else 410 optp = inp->in6p_outputopts; 411 412 /* 413 * Check and convert scope zone ID into internal form. 414 * 415 * XXX: we may still need to determine the zone later. 416 */ 417 if (!(so->so_state & SS_ISCONNECTED)) { 418 if (!optp || !optp->ip6po_pktinfo || 419 !optp->ip6po_pktinfo->ipi6_ifindex) 420 use_defzone = V_ip6_use_defzone; 421 if (dstsock->sin6_scope_id == 0 && !use_defzone) 422 scope_ambiguous = 1; 423 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 424 goto bad; 425 } 426 427 /* 428 * For an ICMPv6 packet, we should know its type and code to update 429 * statistics. 430 */ 431 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 432 struct icmp6_hdr *icmp6; 433 if (m->m_len < sizeof(struct icmp6_hdr) && 434 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 435 error = ENOBUFS; 436 goto bad; 437 } 438 icmp6 = mtod(m, struct icmp6_hdr *); 439 type = icmp6->icmp6_type; 440 code = icmp6->icmp6_code; 441 } 442 443 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 444 if (m == NULL) { 445 error = ENOBUFS; 446 goto bad; 447 } 448 ip6 = mtod(m, struct ip6_hdr *); 449 450 #ifdef ROUTE_MPATH 451 if (CALC_FLOWID_OUTBOUND) { 452 uint32_t hash_type, hash_val; 453 454 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 455 &dstsock->sin6_addr, 0, 0, inp->inp_ip_p, &hash_type); 456 inp->inp_flowid = hash_val; 457 inp->inp_flowtype = hash_type; 458 } 459 #endif 460 /* 461 * Source address selection. 462 */ 463 NET_EPOCH_ENTER(et); 464 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 465 scope_ambiguous, &in6a, &hlim); 466 NET_EPOCH_EXIT(et); 467 468 if (error) 469 goto bad; 470 error = prison_check_ip6(inp->inp_cred, &in6a); 471 if (error != 0) 472 goto bad; 473 ip6->ip6_src = in6a; 474 475 ip6->ip6_dst = dstsock->sin6_addr; 476 477 /* 478 * Fill in the rest of the IPv6 header fields. 479 */ 480 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 481 (inp->inp_flow & IPV6_FLOWINFO_MASK); 482 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 483 (IPV6_VERSION & IPV6_VERSION_MASK); 484 485 /* 486 * ip6_plen will be filled in ip6_output, so not fill it here. 487 */ 488 ip6->ip6_nxt = inp->inp_ip_p; 489 ip6->ip6_hlim = hlim; 490 491 if (inp->inp_ip_p == IPPROTO_ICMPV6 || inp->in6p_cksum != -1) { 492 struct mbuf *n; 493 int off; 494 u_int16_t *p; 495 496 /* Compute checksum. */ 497 if (inp->inp_ip_p == IPPROTO_ICMPV6) 498 off = offsetof(struct icmp6_hdr, icmp6_cksum); 499 else 500 off = inp->in6p_cksum; 501 if (plen < off + 2) { 502 error = EINVAL; 503 goto bad; 504 } 505 off += sizeof(struct ip6_hdr); 506 507 n = m; 508 while (n && n->m_len <= off) { 509 off -= n->m_len; 510 n = n->m_next; 511 } 512 if (!n) 513 goto bad; 514 p = (u_int16_t *)(mtod(n, caddr_t) + off); 515 *p = 0; 516 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 517 } 518 519 /* 520 * Send RA/RS messages to user land for protection, before sending 521 * them to rtadvd/rtsol. 522 */ 523 if ((send_sendso_input_hook != NULL) && 524 inp->inp_ip_p == IPPROTO_ICMPV6) { 525 switch (type) { 526 case ND_ROUTER_ADVERT: 527 case ND_ROUTER_SOLICIT: 528 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 529 sizeof(unsigned short), M_NOWAIT); 530 if (mtag == NULL) 531 goto bad; 532 m_tag_prepend(m, mtag); 533 } 534 } 535 536 NET_EPOCH_ENTER(et); 537 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 538 NET_EPOCH_EXIT(et); 539 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 540 if (oifp) 541 icmp6_ifoutstat_inc(oifp, type, code); 542 ICMP6STAT_INC(icp6s_outhist[type]); 543 } else 544 RIP6STAT_INC(rip6s_opackets); 545 546 goto freectl; 547 548 bad: 549 if (m) 550 m_freem(m); 551 552 freectl: 553 if (control != NULL) { 554 ip6_clearpktopts(&opt, -1); 555 m_freem(control); 556 } 557 INP_WUNLOCK(inp); 558 return (error); 559 560 release: 561 if (control != NULL) 562 m_freem(control); 563 m_freem(m); 564 return (error); 565 } 566 567 /* 568 * Raw IPv6 socket option processing. 569 */ 570 int 571 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 572 { 573 struct inpcb *inp = sotoinpcb(so); 574 int error; 575 576 if (sopt->sopt_level == IPPROTO_ICMPV6) 577 /* 578 * XXX: is it better to call icmp6_ctloutput() directly 579 * from protosw? 580 */ 581 return (icmp6_ctloutput(so, sopt)); 582 else if (sopt->sopt_level != IPPROTO_IPV6) { 583 if (sopt->sopt_level == SOL_SOCKET && 584 sopt->sopt_name == SO_SETFIB) { 585 INP_WLOCK(inp); 586 inp->inp_inc.inc_fibnum = so->so_fibnum; 587 INP_WUNLOCK(inp); 588 return (0); 589 } 590 return (EINVAL); 591 } 592 593 error = 0; 594 595 switch (sopt->sopt_dir) { 596 case SOPT_GET: 597 switch (sopt->sopt_name) { 598 case MRT6_INIT: 599 case MRT6_DONE: 600 case MRT6_ADD_MIF: 601 case MRT6_DEL_MIF: 602 case MRT6_ADD_MFC: 603 case MRT6_DEL_MFC: 604 case MRT6_PIM: 605 if (inp->inp_ip_p != IPPROTO_ICMPV6) 606 return (EOPNOTSUPP); 607 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 608 EOPNOTSUPP; 609 break; 610 case IPV6_CHECKSUM: 611 error = ip6_raw_ctloutput(so, sopt); 612 break; 613 default: 614 error = ip6_ctloutput(so, sopt); 615 break; 616 } 617 break; 618 619 case SOPT_SET: 620 switch (sopt->sopt_name) { 621 case MRT6_INIT: 622 case MRT6_DONE: 623 case MRT6_ADD_MIF: 624 case MRT6_DEL_MIF: 625 case MRT6_ADD_MFC: 626 case MRT6_DEL_MFC: 627 case MRT6_PIM: 628 if (inp->inp_ip_p != IPPROTO_ICMPV6) 629 return (EOPNOTSUPP); 630 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 631 EOPNOTSUPP; 632 break; 633 case IPV6_CHECKSUM: 634 error = ip6_raw_ctloutput(so, sopt); 635 break; 636 default: 637 error = ip6_ctloutput(so, sopt); 638 break; 639 } 640 break; 641 } 642 643 return (error); 644 } 645 646 static int 647 rip6_attach(struct socket *so, int proto, struct thread *td) 648 { 649 struct inpcb *inp; 650 struct icmp6_filter *filter; 651 int error; 652 653 inp = sotoinpcb(so); 654 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 655 656 error = priv_check(td, PRIV_NETINET_RAW); 657 if (error) 658 return (error); 659 if (proto >= IPPROTO_MAX || proto < 0) 660 return (EPROTONOSUPPORT); 661 error = soreserve(so, rip_sendspace, rip_recvspace); 662 if (error) 663 return (error); 664 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 665 if (filter == NULL) 666 return (ENOMEM); 667 error = in_pcballoc(so, &V_ripcbinfo); 668 if (error) { 669 free(filter, M_PCB); 670 return (error); 671 } 672 inp = (struct inpcb *)so->so_pcb; 673 inp->inp_ip_p = proto; 674 inp->in6p_cksum = -1; 675 inp->in6p_icmp6filt = filter; 676 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 677 INP_WUNLOCK(inp); 678 return (0); 679 } 680 681 static void 682 rip6_detach(struct socket *so) 683 { 684 struct inpcb *inp; 685 686 inp = sotoinpcb(so); 687 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 688 689 if (so == V_ip6_mrouter && ip6_mrouter_done) 690 ip6_mrouter_done(); 691 /* xxx: RSVP */ 692 INP_WLOCK(inp); 693 free(inp->in6p_icmp6filt, M_PCB); 694 in_pcbdetach(inp); 695 in_pcbfree(inp); 696 } 697 698 /* XXXRW: This can't ever be called. */ 699 static void 700 rip6_abort(struct socket *so) 701 { 702 struct inpcb *inp __diagused; 703 704 inp = sotoinpcb(so); 705 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 706 707 soisdisconnected(so); 708 } 709 710 static void 711 rip6_close(struct socket *so) 712 { 713 struct inpcb *inp __diagused; 714 715 inp = sotoinpcb(so); 716 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 717 718 soisdisconnected(so); 719 } 720 721 static int 722 rip6_disconnect(struct socket *so) 723 { 724 struct inpcb *inp; 725 726 inp = sotoinpcb(so); 727 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 728 729 if ((so->so_state & SS_ISCONNECTED) == 0) 730 return (ENOTCONN); 731 inp->in6p_faddr = in6addr_any; 732 rip6_abort(so); 733 return (0); 734 } 735 736 static int 737 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 738 { 739 struct epoch_tracker et; 740 struct inpcb *inp; 741 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 742 struct ifaddr *ifa = NULL; 743 int error = 0; 744 745 inp = sotoinpcb(so); 746 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 747 748 if (nam->sa_family != AF_INET6) 749 return (EAFNOSUPPORT); 750 if (nam->sa_len != sizeof(*addr)) 751 return (EINVAL); 752 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 753 return (error); 754 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 755 return (EADDRNOTAVAIL); 756 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 757 return (error); 758 759 NET_EPOCH_ENTER(et); 760 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 761 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 762 NET_EPOCH_EXIT(et); 763 return (EADDRNOTAVAIL); 764 } 765 if (ifa != NULL && 766 ((struct in6_ifaddr *)ifa)->ia6_flags & 767 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 768 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 769 NET_EPOCH_EXIT(et); 770 return (EADDRNOTAVAIL); 771 } 772 NET_EPOCH_EXIT(et); 773 INP_WLOCK(inp); 774 INP_INFO_WLOCK(&V_ripcbinfo); 775 inp->in6p_laddr = addr->sin6_addr; 776 INP_INFO_WUNLOCK(&V_ripcbinfo); 777 INP_WUNLOCK(inp); 778 return (0); 779 } 780 781 static int 782 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 783 { 784 struct inpcb *inp; 785 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 786 struct in6_addr in6a; 787 struct epoch_tracker et; 788 int error = 0, scope_ambiguous = 0; 789 790 inp = sotoinpcb(so); 791 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 792 793 if (nam->sa_len != sizeof(*addr)) 794 return (EINVAL); 795 if (CK_STAILQ_EMPTY(&V_ifnet)) 796 return (EADDRNOTAVAIL); 797 if (addr->sin6_family != AF_INET6) 798 return (EAFNOSUPPORT); 799 800 /* 801 * Application should provide a proper zone ID or the use of default 802 * zone IDs should be enabled. Unfortunately, some applications do 803 * not behave as it should, so we need a workaround. Even if an 804 * appropriate ID is not determined, we'll see if we can determine 805 * the outgoing interface. If we can, determine the zone ID based on 806 * the interface below. 807 */ 808 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 809 scope_ambiguous = 1; 810 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 811 return (error); 812 813 INP_WLOCK(inp); 814 INP_INFO_WLOCK(&V_ripcbinfo); 815 /* Source address selection. XXX: need pcblookup? */ 816 NET_EPOCH_ENTER(et); 817 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 818 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 819 NET_EPOCH_EXIT(et); 820 if (error) { 821 INP_INFO_WUNLOCK(&V_ripcbinfo); 822 INP_WUNLOCK(inp); 823 return (error); 824 } 825 826 inp->in6p_faddr = addr->sin6_addr; 827 inp->in6p_laddr = in6a; 828 soisconnected(so); 829 INP_INFO_WUNLOCK(&V_ripcbinfo); 830 INP_WUNLOCK(inp); 831 return (0); 832 } 833 834 static int 835 rip6_shutdown(struct socket *so) 836 { 837 struct inpcb *inp; 838 839 inp = sotoinpcb(so); 840 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 841 842 INP_WLOCK(inp); 843 socantsendmore(so); 844 INP_WUNLOCK(inp); 845 return (0); 846 } 847 848 struct protosw rip6_protosw = { 849 .pr_type = SOCK_RAW, 850 .pr_flags = PR_ATOMIC|PR_ADDR, 851 .pr_ctloutput = rip6_ctloutput, 852 .pr_abort = rip6_abort, 853 .pr_attach = rip6_attach, 854 .pr_bind = rip6_bind, 855 .pr_connect = rip6_connect, 856 .pr_control = in6_control, 857 .pr_detach = rip6_detach, 858 .pr_disconnect = rip6_disconnect, 859 .pr_peeraddr = in6_getpeeraddr, 860 .pr_send = rip6_send, 861 .pr_shutdown = rip6_shutdown, 862 .pr_sockaddr = in6_getsockaddr, 863 .pr_close = rip6_close 864 }; 865