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 62 #include "opt_ipsec.h" 63 #include "opt_inet6.h" 64 #include "opt_route.h" 65 66 #include <sys/param.h> 67 #include <sys/errno.h> 68 #include <sys/jail.h> 69 #include <sys/kernel.h> 70 #include <sys/lock.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/priv.h> 74 #include <sys/proc.h> 75 #include <sys/protosw.h> 76 #include <sys/signalvar.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/sx.h> 80 #include <sys/syslog.h> 81 82 #include <net/if.h> 83 #include <net/if_var.h> 84 #include <net/if_private.h> 85 #include <net/if_types.h> 86 #include <net/route.h> 87 #include <net/vnet.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/in_pcb.h> 93 94 #include <netinet/icmp6.h> 95 #include <netinet/ip6.h> 96 #include <netinet/ip_var.h> 97 #include <netinet6/ip6_mroute.h> 98 #include <netinet6/in6_pcb.h> 99 #include <netinet6/ip6_var.h> 100 #include <netinet6/nd6.h> 101 #include <netinet6/raw_ip6.h> 102 #include <netinet6/in6_fib.h> 103 #include <netinet6/scope6_var.h> 104 #include <netinet6/send.h> 105 106 #include <netipsec/ipsec_support.h> 107 108 #include <machine/stdarg.h> 109 110 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 111 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 112 113 /* 114 * Raw interface to IP6 protocol. 115 */ 116 117 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 118 #define V_ripcbinfo VNET(ripcbinfo) 119 120 VNET_DECLARE(int, rip_bind_all_fibs); 121 #define V_rip_bind_all_fibs VNET(rip_bind_all_fibs) 122 123 extern u_long rip_sendspace; 124 extern u_long rip_recvspace; 125 126 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 127 VNET_PCPUSTAT_SYSINIT(rip6stat); 128 129 #ifdef VIMAGE 130 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 131 #endif /* VIMAGE */ 132 133 /* 134 * Hooks for multicast routing. They all default to NULL, so leave them not 135 * initialized and rely on BSS being set to 0. 136 */ 137 138 /* 139 * The socket used to communicate with the multicast routing daemon. 140 */ 141 VNET_DEFINE(struct socket *, ip6_mrouter); 142 143 /* 144 * The various mrouter functions. 145 */ 146 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 147 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 148 int (*ip6_mrouter_done)(void); 149 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 150 int (*mrt6_ioctl)(u_long, caddr_t); 151 152 struct rip6_inp_match_ctx { 153 struct ip6_hdr *ip6; 154 int proto; 155 }; 156 157 static bool 158 rip6_inp_match(const struct inpcb *inp, void *v) 159 { 160 struct rip6_inp_match_ctx *c = v; 161 struct ip6_hdr *ip6 = c->ip6; 162 int proto = c->proto; 163 164 /* XXX inp locking */ 165 if ((inp->inp_vflag & INP_IPV6) == 0) 166 return (false); 167 if (inp->inp_ip_p && inp->inp_ip_p != proto) 168 return (false); 169 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 170 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 171 return (false); 172 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 173 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 174 return (false); 175 176 return (true); 177 } 178 179 /* 180 * Setup generic address and protocol structures for raw_input routine, then 181 * pass them along with mbuf chain. 182 */ 183 int 184 rip6_input(struct mbuf **mp, int *offp, int proto) 185 { 186 struct ifnet *ifp; 187 struct mbuf *n, *m = *mp; 188 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 189 struct inpcb *inp; 190 struct mbuf *opts = NULL; 191 struct sockaddr_in6 fromsa; 192 struct rip6_inp_match_ctx ctx = { .ip6 = ip6, .proto = proto }; 193 struct inpcb_iterator inpi = INP_ITERATOR(&V_ripcbinfo, 194 INPLOOKUP_RLOCKPCB, rip6_inp_match, &ctx); 195 int delivered = 0, fib; 196 197 M_ASSERTPKTHDR(m); 198 NET_EPOCH_ASSERT(); 199 200 RIP6STAT_INC(rip6s_ipackets); 201 202 init_sin6(&fromsa, m, 0); /* general init */ 203 204 fib = M_GETFIB(m); 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 (V_rip_bind_all_fibs == 0 && fib != inp->inp_inc.inc_fibnum) 229 /* 230 * Sockets bound to a specific FIB can only receive 231 * packets from that FIB. 232 */ 233 continue; 234 if (inp->in6p_cksum != -1) { 235 RIP6STAT_INC(rip6s_isum); 236 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 || 237 in6_cksum(m, proto, *offp, 238 m->m_pkthdr.len - *offp)) { 239 RIP6STAT_INC(rip6s_badsum); 240 /* 241 * Drop the received message, don't send an 242 * ICMP6 message. Set proto to IPPROTO_NONE 243 * to achieve that. 244 */ 245 INP_RUNLOCK(inp); 246 proto = IPPROTO_NONE; 247 break; 248 } 249 } 250 /* 251 * If this raw socket has multicast state, and we 252 * have received a multicast, check if this socket 253 * should receive it, as multicast filtering is now 254 * the responsibility of the transport layer. 255 */ 256 if (inp->in6p_moptions && 257 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 258 /* 259 * If the incoming datagram is for MLD, allow it 260 * through unconditionally to the raw socket. 261 * 262 * Use the M_RTALERT_MLD flag to check for MLD 263 * traffic without having to inspect the mbuf chain 264 * more deeply, as all MLDv1/v2 host messages MUST 265 * contain the Router Alert option. 266 * 267 * In the case of MLDv1, we may not have explicitly 268 * joined the group, and may have set IFF_ALLMULTI 269 * on the interface. im6o_mc_filter() may discard 270 * control traffic we actually need to see. 271 * 272 * Userland multicast routing daemons should continue 273 * filter the control traffic appropriately. 274 */ 275 int blocked; 276 277 blocked = MCAST_PASS; 278 if ((m->m_flags & M_RTALERT_MLD) == 0) { 279 struct sockaddr_in6 mcaddr; 280 281 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 282 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 283 mcaddr.sin6_family = AF_INET6; 284 mcaddr.sin6_addr = ip6->ip6_dst; 285 286 blocked = im6o_mc_filter(inp->in6p_moptions, 287 ifp, 288 (struct sockaddr *)&mcaddr, 289 (struct sockaddr *)&fromsa); 290 } 291 if (blocked != MCAST_PASS) { 292 IP6STAT_INC(ip6s_notmember); 293 continue; 294 } 295 } 296 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) 297 continue; 298 if (inp->inp_flags & INP_CONTROLOPTS || 299 inp->inp_socket->so_options & SO_TIMESTAMP) 300 ip6_savecontrol(inp, n, &opts); 301 /* strip intermediate headers */ 302 m_adj(n, *offp); 303 if (sbappendaddr(&inp->inp_socket->so_rcv, 304 (struct sockaddr *)&fromsa, n, opts) == 0) { 305 soroverflow(inp->inp_socket); 306 m_freem(n); 307 if (opts) 308 m_freem(opts); 309 RIP6STAT_INC(rip6s_fullsock); 310 } else { 311 sorwakeup(inp->inp_socket); 312 delivered++; 313 } 314 opts = NULL; 315 } 316 if (delivered == 0) { 317 RIP6STAT_INC(rip6s_nosock); 318 if (m->m_flags & M_MCAST) 319 RIP6STAT_INC(rip6s_nosockmcast); 320 if (proto == IPPROTO_NONE) 321 m_freem(m); 322 else 323 icmp6_error(m, ICMP6_PARAM_PROB, 324 ICMP6_PARAMPROB_NEXTHEADER, 325 ip6_get_prevhdr(m, *offp)); 326 IP6STAT_DEC(ip6s_delivered); 327 } else 328 m_freem(m); 329 return (IPPROTO_DONE); 330 } 331 332 void 333 rip6_ctlinput(struct ip6ctlparam *ip6cp) 334 { 335 int errno; 336 337 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) != 0) 338 in6_pcbnotify(&V_ripcbinfo, ip6cp->ip6c_finaldst, 0, 339 ip6cp->ip6c_src, 0, errno, ip6cp->ip6c_cmdarg, 340 in6_rtchange); 341 } 342 343 /* 344 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 345 * may have setup with control call. 346 */ 347 static int 348 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 349 struct mbuf *control, struct thread *td) 350 { 351 struct epoch_tracker et; 352 struct inpcb *inp; 353 struct sockaddr_in6 tmp, *dstsock; 354 struct m_tag *mtag; 355 struct ip6_hdr *ip6; 356 u_int plen = m->m_pkthdr.len; 357 struct ip6_pktopts opt, *optp; 358 struct ifnet *oifp = NULL; 359 int error; 360 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 361 int scope_ambiguous = 0; 362 int use_defzone = 0; 363 int hlim = 0; 364 struct in6_addr in6a; 365 366 inp = sotoinpcb(so); 367 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 368 369 /* Always copy sockaddr to avoid overwrites. */ 370 /* Unlocked read. */ 371 if (so->so_state & SS_ISCONNECTED) { 372 if (nam) { 373 error = EISCONN; 374 goto release; 375 } 376 tmp = (struct sockaddr_in6 ){ 377 .sin6_family = AF_INET6, 378 .sin6_len = sizeof(struct sockaddr_in6), 379 }; 380 INP_RLOCK(inp); 381 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 382 sizeof(struct in6_addr)); 383 INP_RUNLOCK(inp); 384 dstsock = &tmp; 385 } else { 386 if (nam == NULL) 387 error = ENOTCONN; 388 else if (nam->sa_family != AF_INET6) 389 error = EAFNOSUPPORT; 390 else if (nam->sa_len != sizeof(struct sockaddr_in6)) 391 error = EINVAL; 392 else 393 error = 0; 394 if (error != 0) 395 goto release; 396 dstsock = (struct sockaddr_in6 *)nam; 397 if (dstsock->sin6_family != AF_INET6) { 398 error = EAFNOSUPPORT; 399 goto release; 400 } 401 } 402 403 INP_WLOCK(inp); 404 405 if (control != NULL) { 406 NET_EPOCH_ENTER(et); 407 error = ip6_setpktopts(control, &opt, inp->in6p_outputopts, 408 so->so_cred, inp->inp_ip_p); 409 NET_EPOCH_EXIT(et); 410 411 if (error != 0) { 412 goto bad; 413 } 414 optp = &opt; 415 } else 416 optp = inp->in6p_outputopts; 417 418 /* 419 * Check and convert scope zone ID into internal form. 420 * 421 * XXX: we may still need to determine the zone later. 422 */ 423 if (!(so->so_state & SS_ISCONNECTED)) { 424 if (!optp || !optp->ip6po_pktinfo || 425 !optp->ip6po_pktinfo->ipi6_ifindex) 426 use_defzone = V_ip6_use_defzone; 427 if (dstsock->sin6_scope_id == 0 && !use_defzone) 428 scope_ambiguous = 1; 429 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 430 goto bad; 431 } 432 433 /* 434 * For an ICMPv6 packet, we should know its type and code to update 435 * statistics. 436 */ 437 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 438 struct icmp6_hdr *icmp6; 439 if (m->m_len < sizeof(struct icmp6_hdr) && 440 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 441 error = ENOBUFS; 442 goto bad; 443 } 444 icmp6 = mtod(m, struct icmp6_hdr *); 445 type = icmp6->icmp6_type; 446 code = icmp6->icmp6_code; 447 } 448 449 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 450 if (m == NULL) { 451 error = ENOBUFS; 452 goto bad; 453 } 454 ip6 = mtod(m, struct ip6_hdr *); 455 456 #ifdef ROUTE_MPATH 457 if (CALC_FLOWID_OUTBOUND) { 458 uint32_t hash_type, hash_val; 459 460 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 461 &dstsock->sin6_addr, 0, 0, inp->inp_ip_p, &hash_type); 462 inp->inp_flowid = hash_val; 463 inp->inp_flowtype = hash_type; 464 } 465 #endif 466 /* 467 * Source address selection. 468 */ 469 NET_EPOCH_ENTER(et); 470 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 471 scope_ambiguous, &in6a, &hlim); 472 NET_EPOCH_EXIT(et); 473 474 if (error) 475 goto bad; 476 error = prison_check_ip6(inp->inp_cred, &in6a); 477 if (error != 0) 478 goto bad; 479 ip6->ip6_src = in6a; 480 481 ip6->ip6_dst = dstsock->sin6_addr; 482 483 /* 484 * Fill in the rest of the IPv6 header fields. 485 */ 486 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 487 (inp->inp_flow & IPV6_FLOWINFO_MASK); 488 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 489 (IPV6_VERSION & IPV6_VERSION_MASK); 490 491 /* 492 * ip6_plen will be filled in ip6_output, so not fill it here. 493 */ 494 ip6->ip6_nxt = inp->inp_ip_p; 495 ip6->ip6_hlim = hlim; 496 497 if (inp->inp_ip_p == IPPROTO_ICMPV6 || inp->in6p_cksum != -1) { 498 struct mbuf *n; 499 int off; 500 u_int16_t *p; 501 502 /* Compute checksum. */ 503 if (inp->inp_ip_p == IPPROTO_ICMPV6) 504 off = offsetof(struct icmp6_hdr, icmp6_cksum); 505 else 506 off = inp->in6p_cksum; 507 if (plen < off + 2) { 508 error = EINVAL; 509 goto bad; 510 } 511 off += sizeof(struct ip6_hdr); 512 513 n = m; 514 while (n && n->m_len <= off) { 515 off -= n->m_len; 516 n = n->m_next; 517 } 518 if (!n) 519 goto bad; 520 p = (u_int16_t *)(mtod(n, caddr_t) + off); 521 *p = 0; 522 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 523 } 524 525 /* 526 * Send RA/RS messages to user land for protection, before sending 527 * them to rtadvd/rtsol. 528 */ 529 if ((send_sendso_input_hook != NULL) && 530 inp->inp_ip_p == IPPROTO_ICMPV6) { 531 switch (type) { 532 case ND_ROUTER_ADVERT: 533 case ND_ROUTER_SOLICIT: 534 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 535 sizeof(unsigned short), M_NOWAIT); 536 if (mtag == NULL) 537 goto bad; 538 m_tag_prepend(m, mtag); 539 } 540 } 541 542 NET_EPOCH_ENTER(et); 543 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 544 NET_EPOCH_EXIT(et); 545 if (inp->inp_ip_p == IPPROTO_ICMPV6) { 546 if (oifp) 547 icmp6_ifoutstat_inc(oifp, type, code); 548 ICMP6STAT_INC2(icp6s_outhist, type); 549 } else 550 RIP6STAT_INC(rip6s_opackets); 551 552 goto freectl; 553 554 bad: 555 if (m) 556 m_freem(m); 557 558 freectl: 559 if (control != NULL) { 560 ip6_clearpktopts(&opt, -1); 561 m_freem(control); 562 } 563 INP_WUNLOCK(inp); 564 return (error); 565 566 release: 567 if (control != NULL) 568 m_freem(control); 569 m_freem(m); 570 return (error); 571 } 572 573 /* 574 * Raw IPv6 socket option processing. 575 */ 576 int 577 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 578 { 579 struct inpcb *inp = sotoinpcb(so); 580 int error; 581 582 if (sopt->sopt_level == IPPROTO_ICMPV6) 583 /* 584 * XXX: is it better to call icmp6_ctloutput() directly 585 * from protosw? 586 */ 587 return (icmp6_ctloutput(so, sopt)); 588 else if (sopt->sopt_level != IPPROTO_IPV6) { 589 if (sopt->sopt_dir == SOPT_SET && 590 sopt->sopt_level == SOL_SOCKET && 591 sopt->sopt_name == SO_SETFIB) 592 return (ip6_ctloutput(so, sopt)); 593 return (EINVAL); 594 } 595 596 error = 0; 597 598 switch (sopt->sopt_dir) { 599 case SOPT_GET: 600 switch (sopt->sopt_name) { 601 case MRT6_INIT: 602 case MRT6_DONE: 603 case MRT6_ADD_MIF: 604 case MRT6_DEL_MIF: 605 case MRT6_ADD_MFC: 606 case MRT6_DEL_MFC: 607 case MRT6_PIM: 608 if (inp->inp_ip_p != IPPROTO_ICMPV6) 609 return (EOPNOTSUPP); 610 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 611 EOPNOTSUPP; 612 break; 613 case IPV6_CHECKSUM: 614 error = ip6_raw_ctloutput(so, sopt); 615 break; 616 default: 617 error = ip6_ctloutput(so, sopt); 618 break; 619 } 620 break; 621 622 case SOPT_SET: 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_set ? ip6_mrouter_set(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 } 645 646 return (error); 647 } 648 649 static int 650 rip6_attach(struct socket *so, int proto, struct thread *td) 651 { 652 struct inpcb *inp; 653 struct icmp6_filter *filter; 654 int error; 655 656 inp = sotoinpcb(so); 657 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 658 659 error = priv_check(td, PRIV_NETINET_RAW); 660 if (error) 661 return (error); 662 if (proto >= IPPROTO_MAX || proto < 0) 663 return (EPROTONOSUPPORT); 664 error = soreserve(so, rip_sendspace, rip_recvspace); 665 if (error) 666 return (error); 667 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 668 if (filter == NULL) 669 return (ENOMEM); 670 error = in_pcballoc(so, &V_ripcbinfo); 671 if (error) { 672 free(filter, M_PCB); 673 return (error); 674 } 675 inp = (struct inpcb *)so->so_pcb; 676 inp->inp_ip_p = proto; 677 inp->in6p_cksum = -1; 678 inp->in6p_icmp6filt = filter; 679 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 680 INP_WUNLOCK(inp); 681 return (0); 682 } 683 684 static void 685 rip6_detach(struct socket *so) 686 { 687 struct inpcb *inp; 688 689 inp = sotoinpcb(so); 690 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 691 692 if (so == V_ip6_mrouter && ip6_mrouter_done) 693 ip6_mrouter_done(); 694 /* xxx: RSVP */ 695 INP_WLOCK(inp); 696 free(inp->in6p_icmp6filt, M_PCB); 697 in_pcbfree(inp); 698 } 699 700 /* XXXRW: This can't ever be called. */ 701 static void 702 rip6_abort(struct socket *so) 703 { 704 struct inpcb *inp __diagused; 705 706 inp = sotoinpcb(so); 707 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 708 709 soisdisconnected(so); 710 } 711 712 static void 713 rip6_close(struct socket *so) 714 { 715 struct inpcb *inp __diagused; 716 717 inp = sotoinpcb(so); 718 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 719 720 soisdisconnected(so); 721 } 722 723 static int 724 rip6_disconnect(struct socket *so) 725 { 726 struct inpcb *inp; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 730 731 if ((so->so_state & SS_ISCONNECTED) == 0) 732 return (ENOTCONN); 733 inp->in6p_faddr = in6addr_any; 734 rip6_abort(so); 735 return (0); 736 } 737 738 static int 739 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 740 { 741 struct epoch_tracker et; 742 struct inpcb *inp; 743 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 744 struct ifaddr *ifa = NULL; 745 int error = 0; 746 747 inp = sotoinpcb(so); 748 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 749 750 if (nam->sa_family != AF_INET6) 751 return (EAFNOSUPPORT); 752 if (nam->sa_len != sizeof(*addr)) 753 return (EINVAL); 754 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 755 return (error); 756 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 757 return (EADDRNOTAVAIL); 758 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 759 return (error); 760 761 NET_EPOCH_ENTER(et); 762 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 763 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 764 NET_EPOCH_EXIT(et); 765 return (EADDRNOTAVAIL); 766 } 767 if (ifa != NULL && 768 ((struct in6_ifaddr *)ifa)->ia6_flags & 769 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 770 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 771 NET_EPOCH_EXIT(et); 772 return (EADDRNOTAVAIL); 773 } 774 NET_EPOCH_EXIT(et); 775 INP_WLOCK(inp); 776 inp->in6p_laddr = addr->sin6_addr; 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 /* Source address selection. XXX: need pcblookup? */ 815 NET_EPOCH_ENTER(et); 816 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 817 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 818 NET_EPOCH_EXIT(et); 819 if (error) { 820 INP_WUNLOCK(inp); 821 return (error); 822 } 823 824 inp->in6p_faddr = addr->sin6_addr; 825 inp->in6p_laddr = in6a; 826 soisconnected(so); 827 INP_WUNLOCK(inp); 828 return (0); 829 } 830 831 static int 832 rip6_shutdown(struct socket *so, enum shutdown_how how) 833 { 834 835 SOCK_LOCK(so); 836 if (!(so->so_state & SS_ISCONNECTED)) { 837 SOCK_UNLOCK(so); 838 return (ENOTCONN); 839 } 840 SOCK_UNLOCK(so); 841 842 switch (how) { 843 case SHUT_RD: 844 sorflush(so); 845 break; 846 case SHUT_RDWR: 847 sorflush(so); 848 /* FALLTHROUGH */ 849 case SHUT_WR: 850 socantsendmore(so); 851 } 852 853 return (0); 854 } 855 856 struct protosw rip6_protosw = { 857 .pr_type = SOCK_RAW, 858 .pr_flags = PR_ATOMIC|PR_ADDR, 859 .pr_ctloutput = rip6_ctloutput, 860 .pr_abort = rip6_abort, 861 .pr_attach = rip6_attach, 862 .pr_bind = rip6_bind, 863 .pr_connect = rip6_connect, 864 .pr_control = in6_control, 865 .pr_detach = rip6_detach, 866 .pr_disconnect = rip6_disconnect, 867 .pr_peeraddr = in6_getpeeraddr, 868 .pr_send = rip6_send, 869 .pr_shutdown = rip6_shutdown, 870 .pr_sockaddr = in6_getsockaddr, 871 .pr_close = rip6_close 872 }; 873