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 inpcbhead, ripcb); 123 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 124 #define V_ripcb VNET(ripcb) 125 #define V_ripcbinfo VNET(ripcbinfo) 126 127 extern u_long rip_sendspace; 128 extern u_long rip_recvspace; 129 130 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 131 VNET_PCPUSTAT_SYSINIT(rip6stat); 132 133 #ifdef VIMAGE 134 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 135 #endif /* VIMAGE */ 136 137 /* 138 * Hooks for multicast routing. They all default to NULL, so leave them not 139 * initialized and rely on BSS being set to 0. 140 */ 141 142 /* 143 * The socket used to communicate with the multicast routing daemon. 144 */ 145 VNET_DEFINE(struct socket *, ip6_mrouter); 146 147 /* 148 * The various mrouter functions. 149 */ 150 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 151 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 152 int (*ip6_mrouter_done)(void); 153 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 154 int (*mrt6_ioctl)(u_long, caddr_t); 155 156 /* 157 * Setup generic address and protocol structures for raw_input routine, then 158 * pass them along with mbuf chain. 159 */ 160 int 161 rip6_input(struct mbuf **mp, int *offp, int proto) 162 { 163 struct ifnet *ifp; 164 struct mbuf *m = *mp; 165 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 166 struct inpcb *inp; 167 struct inpcb *last = NULL; 168 struct mbuf *opts = NULL; 169 struct sockaddr_in6 fromsa; 170 171 NET_EPOCH_ASSERT(); 172 173 RIP6STAT_INC(rip6s_ipackets); 174 175 init_sin6(&fromsa, m, 0); /* general init */ 176 177 ifp = m->m_pkthdr.rcvif; 178 179 CK_LIST_FOREACH(inp, &V_ripcb, inp_list) { 180 /* XXX inp locking */ 181 if ((inp->inp_vflag & INP_IPV6) == 0) 182 continue; 183 if (inp->inp_ip_p && 184 inp->inp_ip_p != proto) 185 continue; 186 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 187 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 188 continue; 189 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 190 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 191 continue; 192 if (last != NULL) { 193 struct mbuf *n = m_copym(m, 0, M_COPYALL, M_NOWAIT); 194 195 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 196 /* 197 * Check AH/ESP integrity. 198 */ 199 if (IPSEC_ENABLED(ipv6)) { 200 if (n != NULL && 201 IPSEC_CHECK_POLICY(ipv6, n, last) != 0) { 202 m_freem(n); 203 /* Do not inject data into pcb. */ 204 n = NULL; 205 } 206 } 207 #endif /* IPSEC */ 208 if (n) { 209 if (last->inp_flags & INP_CONTROLOPTS || 210 last->inp_socket->so_options & SO_TIMESTAMP) 211 ip6_savecontrol(last, n, &opts); 212 /* strip intermediate headers */ 213 m_adj(n, *offp); 214 if (sbappendaddr(&last->inp_socket->so_rcv, 215 (struct sockaddr *)&fromsa, 216 n, opts) == 0) { 217 soroverflow(last->inp_socket); 218 m_freem(n); 219 if (opts) 220 m_freem(opts); 221 RIP6STAT_INC(rip6s_fullsock); 222 } else 223 sorwakeup(last->inp_socket); 224 opts = NULL; 225 } 226 INP_RUNLOCK(last); 227 last = NULL; 228 } 229 INP_RLOCK(inp); 230 if (__predict_false(inp->inp_flags2 & INP_FREED)) 231 goto skip_2; 232 if (jailed_without_vnet(inp->inp_cred)) { 233 /* 234 * Allow raw socket in jail to receive multicast; 235 * assume process had PRIV_NETINET_RAW at attach, 236 * and fall through into normal filter path if so. 237 */ 238 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 239 prison_check_ip6(inp->inp_cred, 240 &ip6->ip6_dst) != 0) 241 goto skip_2; 242 } 243 if (inp->in6p_cksum != -1) { 244 RIP6STAT_INC(rip6s_isum); 245 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 || 246 in6_cksum(m, proto, *offp, 247 m->m_pkthdr.len - *offp)) { 248 RIP6STAT_INC(rip6s_badsum); 249 /* 250 * Drop the received message, don't send an 251 * ICMP6 message. Set proto to IPPROTO_NONE 252 * to achieve that. 253 */ 254 proto = IPPROTO_NONE; 255 goto skip_2; 256 } 257 } 258 /* 259 * If this raw socket has multicast state, and we 260 * have received a multicast, check if this socket 261 * should receive it, as multicast filtering is now 262 * the responsibility of the transport layer. 263 */ 264 if (inp->in6p_moptions && 265 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 266 /* 267 * If the incoming datagram is for MLD, allow it 268 * through unconditionally to the raw socket. 269 * 270 * Use the M_RTALERT_MLD flag to check for MLD 271 * traffic without having to inspect the mbuf chain 272 * more deeply, as all MLDv1/v2 host messages MUST 273 * contain the Router Alert option. 274 * 275 * In the case of MLDv1, we may not have explicitly 276 * joined the group, and may have set IFF_ALLMULTI 277 * on the interface. im6o_mc_filter() may discard 278 * control traffic we actually need to see. 279 * 280 * Userland multicast routing daemons should continue 281 * filter the control traffic appropriately. 282 */ 283 int blocked; 284 285 blocked = MCAST_PASS; 286 if ((m->m_flags & M_RTALERT_MLD) == 0) { 287 struct sockaddr_in6 mcaddr; 288 289 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 290 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 291 mcaddr.sin6_family = AF_INET6; 292 mcaddr.sin6_addr = ip6->ip6_dst; 293 294 blocked = im6o_mc_filter(inp->in6p_moptions, 295 ifp, 296 (struct sockaddr *)&mcaddr, 297 (struct sockaddr *)&fromsa); 298 } 299 if (blocked != MCAST_PASS) { 300 IP6STAT_INC(ip6s_notmember); 301 goto skip_2; 302 } 303 } 304 last = inp; 305 continue; 306 skip_2: 307 INP_RUNLOCK(inp); 308 } 309 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 310 /* 311 * Check AH/ESP integrity. 312 */ 313 if (IPSEC_ENABLED(ipv6) && last != NULL && 314 IPSEC_CHECK_POLICY(ipv6, m, last) != 0) { 315 m_freem(m); 316 IP6STAT_DEC(ip6s_delivered); 317 /* Do not inject data into pcb. */ 318 INP_RUNLOCK(last); 319 } else 320 #endif /* IPSEC */ 321 if (last != NULL) { 322 if (last->inp_flags & INP_CONTROLOPTS || 323 last->inp_socket->so_options & SO_TIMESTAMP) 324 ip6_savecontrol(last, m, &opts); 325 /* Strip intermediate headers. */ 326 m_adj(m, *offp); 327 if (sbappendaddr(&last->inp_socket->so_rcv, 328 (struct sockaddr *)&fromsa, m, opts) == 0) { 329 soroverflow(last->inp_socket); 330 m_freem(m); 331 if (opts) 332 m_freem(opts); 333 RIP6STAT_INC(rip6s_fullsock); 334 } else 335 sorwakeup(last->inp_socket); 336 INP_RUNLOCK(last); 337 } else { 338 RIP6STAT_INC(rip6s_nosock); 339 if (m->m_flags & M_MCAST) 340 RIP6STAT_INC(rip6s_nosockmcast); 341 if (proto == IPPROTO_NONE) 342 m_freem(m); 343 else 344 icmp6_error(m, ICMP6_PARAM_PROB, 345 ICMP6_PARAMPROB_NEXTHEADER, 346 ip6_get_prevhdr(m, *offp)); 347 IP6STAT_DEC(ip6s_delivered); 348 } 349 return (IPPROTO_DONE); 350 } 351 352 void 353 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 354 { 355 struct ip6ctlparam *ip6cp = NULL; 356 const struct sockaddr_in6 *sa6_src = NULL; 357 void *cmdarg; 358 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 359 360 if (sa->sa_family != AF_INET6 || 361 sa->sa_len != sizeof(struct sockaddr_in6)) 362 return; 363 364 if ((unsigned)cmd >= PRC_NCMDS) 365 return; 366 if (PRC_IS_REDIRECT(cmd)) 367 notify = in6_rtchange, d = NULL; 368 else if (cmd == PRC_HOSTDEAD) 369 d = NULL; 370 else if (inet6ctlerrmap[cmd] == 0) 371 return; 372 373 /* 374 * If the parameter is from icmp6, decode it. 375 */ 376 if (d != NULL) { 377 ip6cp = (struct ip6ctlparam *)d; 378 cmdarg = ip6cp->ip6c_cmdarg; 379 sa6_src = ip6cp->ip6c_src; 380 } else { 381 cmdarg = NULL; 382 sa6_src = &sa6_any; 383 } 384 385 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 386 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 387 } 388 389 /* 390 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 391 * may have setup with control call. 392 */ 393 int 394 rip6_output(struct mbuf *m, struct socket *so, ...) 395 { 396 struct epoch_tracker et; 397 struct mbuf *control; 398 struct m_tag *mtag; 399 struct sockaddr_in6 *dstsock; 400 struct ip6_hdr *ip6; 401 struct inpcb *inp; 402 u_int plen = m->m_pkthdr.len; 403 int error = 0; 404 struct ip6_pktopts opt, *optp; 405 struct ifnet *oifp = NULL; 406 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 407 int scope_ambiguous = 0; 408 int use_defzone = 0; 409 int hlim = 0; 410 struct in6_addr in6a; 411 va_list ap; 412 413 va_start(ap, so); 414 dstsock = va_arg(ap, struct sockaddr_in6 *); 415 control = va_arg(ap, struct mbuf *); 416 va_end(ap); 417 418 inp = sotoinpcb(so); 419 INP_WLOCK(inp); 420 421 if (control != NULL) { 422 NET_EPOCH_ENTER(et); 423 error = ip6_setpktopts(control, &opt, 424 inp->in6p_outputopts, so->so_cred, 425 so->so_proto->pr_protocol); 426 NET_EPOCH_EXIT(et); 427 428 if (error != 0) { 429 goto bad; 430 } 431 optp = &opt; 432 } else 433 optp = inp->in6p_outputopts; 434 435 /* 436 * Check and convert scope zone ID into internal form. 437 * 438 * XXX: we may still need to determine the zone later. 439 */ 440 if (!(so->so_state & SS_ISCONNECTED)) { 441 if (!optp || !optp->ip6po_pktinfo || 442 !optp->ip6po_pktinfo->ipi6_ifindex) 443 use_defzone = V_ip6_use_defzone; 444 if (dstsock->sin6_scope_id == 0 && !use_defzone) 445 scope_ambiguous = 1; 446 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 447 goto bad; 448 } 449 450 /* 451 * For an ICMPv6 packet, we should know its type and code to update 452 * statistics. 453 */ 454 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 455 struct icmp6_hdr *icmp6; 456 if (m->m_len < sizeof(struct icmp6_hdr) && 457 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 458 error = ENOBUFS; 459 goto bad; 460 } 461 icmp6 = mtod(m, struct icmp6_hdr *); 462 type = icmp6->icmp6_type; 463 code = icmp6->icmp6_code; 464 } 465 466 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 467 if (m == NULL) { 468 error = ENOBUFS; 469 goto bad; 470 } 471 ip6 = mtod(m, struct ip6_hdr *); 472 473 #ifdef ROUTE_MPATH 474 if (CALC_FLOWID_OUTBOUND) { 475 uint32_t hash_type, hash_val; 476 477 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 478 &dstsock->sin6_addr, 0, 0, so->so_proto->pr_protocol, 479 &hash_type); 480 inp->inp_flowid = hash_val; 481 inp->inp_flowtype = hash_type; 482 } 483 #endif 484 /* 485 * Source address selection. 486 */ 487 NET_EPOCH_ENTER(et); 488 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 489 scope_ambiguous, &in6a, &hlim); 490 NET_EPOCH_EXIT(et); 491 492 if (error) 493 goto bad; 494 error = prison_check_ip6(inp->inp_cred, &in6a); 495 if (error != 0) 496 goto bad; 497 ip6->ip6_src = in6a; 498 499 ip6->ip6_dst = dstsock->sin6_addr; 500 501 /* 502 * Fill in the rest of the IPv6 header fields. 503 */ 504 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 505 (inp->inp_flow & IPV6_FLOWINFO_MASK); 506 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 507 (IPV6_VERSION & IPV6_VERSION_MASK); 508 509 /* 510 * ip6_plen will be filled in ip6_output, so not fill it here. 511 */ 512 ip6->ip6_nxt = inp->inp_ip_p; 513 ip6->ip6_hlim = hlim; 514 515 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 516 inp->in6p_cksum != -1) { 517 struct mbuf *n; 518 int off; 519 u_int16_t *p; 520 521 /* Compute checksum. */ 522 if (so->so_proto->pr_protocol == 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 so->so_proto->pr_protocol == 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 (so->so_proto->pr_protocol == 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 } 585 586 /* 587 * Raw IPv6 socket option processing. 588 */ 589 int 590 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 591 { 592 struct inpcb *inp; 593 int error; 594 595 if (sopt->sopt_level == IPPROTO_ICMPV6) 596 /* 597 * XXX: is it better to call icmp6_ctloutput() directly 598 * from protosw? 599 */ 600 return (icmp6_ctloutput(so, sopt)); 601 else if (sopt->sopt_level != IPPROTO_IPV6) { 602 if (sopt->sopt_level == SOL_SOCKET && 603 sopt->sopt_name == SO_SETFIB) { 604 inp = sotoinpcb(so); 605 INP_WLOCK(inp); 606 inp->inp_inc.inc_fibnum = so->so_fibnum; 607 INP_WUNLOCK(inp); 608 return (0); 609 } 610 return (EINVAL); 611 } 612 613 error = 0; 614 615 switch (sopt->sopt_dir) { 616 case SOPT_GET: 617 switch (sopt->sopt_name) { 618 case MRT6_INIT: 619 case MRT6_DONE: 620 case MRT6_ADD_MIF: 621 case MRT6_DEL_MIF: 622 case MRT6_ADD_MFC: 623 case MRT6_DEL_MFC: 624 case MRT6_PIM: 625 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 626 EOPNOTSUPP; 627 break; 628 case IPV6_CHECKSUM: 629 error = ip6_raw_ctloutput(so, sopt); 630 break; 631 default: 632 error = ip6_ctloutput(so, sopt); 633 break; 634 } 635 break; 636 637 case SOPT_SET: 638 switch (sopt->sopt_name) { 639 case MRT6_INIT: 640 case MRT6_DONE: 641 case MRT6_ADD_MIF: 642 case MRT6_DEL_MIF: 643 case MRT6_ADD_MFC: 644 case MRT6_DEL_MFC: 645 case MRT6_PIM: 646 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 647 EOPNOTSUPP; 648 break; 649 case IPV6_CHECKSUM: 650 error = ip6_raw_ctloutput(so, sopt); 651 break; 652 default: 653 error = ip6_ctloutput(so, sopt); 654 break; 655 } 656 break; 657 } 658 659 return (error); 660 } 661 662 static int 663 rip6_attach(struct socket *so, int proto, struct thread *td) 664 { 665 struct inpcb *inp; 666 struct icmp6_filter *filter; 667 int error; 668 669 inp = sotoinpcb(so); 670 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 671 672 error = priv_check(td, PRIV_NETINET_RAW); 673 if (error) 674 return (error); 675 error = soreserve(so, rip_sendspace, rip_recvspace); 676 if (error) 677 return (error); 678 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 679 if (filter == NULL) 680 return (ENOMEM); 681 INP_INFO_WLOCK(&V_ripcbinfo); 682 error = in_pcballoc(so, &V_ripcbinfo); 683 if (error) { 684 INP_INFO_WUNLOCK(&V_ripcbinfo); 685 free(filter, M_PCB); 686 return (error); 687 } 688 inp = (struct inpcb *)so->so_pcb; 689 INP_INFO_WUNLOCK(&V_ripcbinfo); 690 inp->inp_vflag |= INP_IPV6; 691 inp->inp_ip_p = (long)proto; 692 inp->in6p_hops = -1; /* use kernel default */ 693 inp->in6p_cksum = -1; 694 inp->in6p_icmp6filt = filter; 695 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 696 INP_WUNLOCK(inp); 697 return (0); 698 } 699 700 static void 701 rip6_detach(struct socket *so) 702 { 703 struct inpcb *inp; 704 705 inp = sotoinpcb(so); 706 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 707 708 if (so == V_ip6_mrouter && ip6_mrouter_done) 709 ip6_mrouter_done(); 710 /* xxx: RSVP */ 711 INP_INFO_WLOCK(&V_ripcbinfo); 712 INP_WLOCK(inp); 713 free(inp->in6p_icmp6filt, M_PCB); 714 in_pcbdetach(inp); 715 in_pcbfree(inp); 716 INP_INFO_WUNLOCK(&V_ripcbinfo); 717 } 718 719 /* XXXRW: This can't ever be called. */ 720 static void 721 rip6_abort(struct socket *so) 722 { 723 struct inpcb *inp; 724 725 inp = sotoinpcb(so); 726 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 727 728 soisdisconnected(so); 729 } 730 731 static void 732 rip6_close(struct socket *so) 733 { 734 struct inpcb *inp; 735 736 inp = sotoinpcb(so); 737 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 738 739 soisdisconnected(so); 740 } 741 742 static int 743 rip6_disconnect(struct socket *so) 744 { 745 struct inpcb *inp; 746 747 inp = sotoinpcb(so); 748 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 749 750 if ((so->so_state & SS_ISCONNECTED) == 0) 751 return (ENOTCONN); 752 inp->in6p_faddr = in6addr_any; 753 rip6_abort(so); 754 return (0); 755 } 756 757 static int 758 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 759 { 760 struct epoch_tracker et; 761 struct inpcb *inp; 762 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 763 struct ifaddr *ifa = NULL; 764 int error = 0; 765 766 inp = sotoinpcb(so); 767 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 768 769 if (nam->sa_family != AF_INET6) 770 return (EAFNOSUPPORT); 771 if (nam->sa_len != sizeof(*addr)) 772 return (EINVAL); 773 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 774 return (error); 775 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 776 return (EADDRNOTAVAIL); 777 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 778 return (error); 779 780 NET_EPOCH_ENTER(et); 781 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 782 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 783 NET_EPOCH_EXIT(et); 784 return (EADDRNOTAVAIL); 785 } 786 if (ifa != NULL && 787 ((struct in6_ifaddr *)ifa)->ia6_flags & 788 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 789 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 790 NET_EPOCH_EXIT(et); 791 return (EADDRNOTAVAIL); 792 } 793 NET_EPOCH_EXIT(et); 794 INP_INFO_WLOCK(&V_ripcbinfo); 795 INP_WLOCK(inp); 796 inp->in6p_laddr = addr->sin6_addr; 797 INP_WUNLOCK(inp); 798 INP_INFO_WUNLOCK(&V_ripcbinfo); 799 return (0); 800 } 801 802 static int 803 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 804 { 805 struct inpcb *inp; 806 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 807 struct in6_addr in6a; 808 struct epoch_tracker et; 809 int error = 0, scope_ambiguous = 0; 810 811 inp = sotoinpcb(so); 812 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 813 814 if (nam->sa_len != sizeof(*addr)) 815 return (EINVAL); 816 if (CK_STAILQ_EMPTY(&V_ifnet)) 817 return (EADDRNOTAVAIL); 818 if (addr->sin6_family != AF_INET6) 819 return (EAFNOSUPPORT); 820 821 /* 822 * Application should provide a proper zone ID or the use of default 823 * zone IDs should be enabled. Unfortunately, some applications do 824 * not behave as it should, so we need a workaround. Even if an 825 * appropriate ID is not determined, we'll see if we can determine 826 * the outgoing interface. If we can, determine the zone ID based on 827 * the interface below. 828 */ 829 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 830 scope_ambiguous = 1; 831 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 832 return (error); 833 834 INP_INFO_WLOCK(&V_ripcbinfo); 835 INP_WLOCK(inp); 836 /* Source address selection. XXX: need pcblookup? */ 837 NET_EPOCH_ENTER(et); 838 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 839 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 840 NET_EPOCH_EXIT(et); 841 if (error) { 842 INP_WUNLOCK(inp); 843 INP_INFO_WUNLOCK(&V_ripcbinfo); 844 return (error); 845 } 846 847 inp->in6p_faddr = addr->sin6_addr; 848 inp->in6p_laddr = in6a; 849 soisconnected(so); 850 INP_WUNLOCK(inp); 851 INP_INFO_WUNLOCK(&V_ripcbinfo); 852 return (0); 853 } 854 855 static int 856 rip6_shutdown(struct socket *so) 857 { 858 struct inpcb *inp; 859 860 inp = sotoinpcb(so); 861 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 862 863 INP_WLOCK(inp); 864 socantsendmore(so); 865 INP_WUNLOCK(inp); 866 return (0); 867 } 868 869 static int 870 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 871 struct mbuf *control, struct thread *td) 872 { 873 struct inpcb *inp; 874 struct sockaddr_in6 tmp; 875 struct sockaddr_in6 *dst; 876 int error; 877 878 inp = sotoinpcb(so); 879 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 880 881 /* Always copy sockaddr to avoid overwrites. */ 882 /* Unlocked read. */ 883 if (so->so_state & SS_ISCONNECTED) { 884 if (nam) { 885 error = EISCONN; 886 goto release; 887 } 888 /* XXX */ 889 bzero(&tmp, sizeof(tmp)); 890 tmp.sin6_family = AF_INET6; 891 tmp.sin6_len = sizeof(struct sockaddr_in6); 892 INP_RLOCK(inp); 893 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 894 sizeof(struct in6_addr)); 895 INP_RUNLOCK(inp); 896 dst = &tmp; 897 } else { 898 error = 0; 899 if (nam == NULL) 900 error = ENOTCONN; 901 else if (nam->sa_family != AF_INET6) 902 error = EAFNOSUPPORT; 903 else if (nam->sa_len != sizeof(struct sockaddr_in6)) 904 error = EINVAL; 905 if (error != 0) 906 goto release; 907 tmp = *(struct sockaddr_in6 *)nam; 908 dst = &tmp; 909 910 if (dst->sin6_family == AF_UNSPEC) { 911 /* 912 * XXX: we allow this case for backward 913 * compatibility to buggy applications that 914 * rely on old (and wrong) kernel behavior. 915 */ 916 log(LOG_INFO, "rip6 SEND: address family is " 917 "unspec. Assume AF_INET6\n"); 918 dst->sin6_family = AF_INET6; 919 } else if (dst->sin6_family != AF_INET6) { 920 error = EAFNOSUPPORT; 921 goto release; 922 } 923 } 924 return (rip6_output(m, so, dst, control)); 925 926 release: 927 if (control != NULL) 928 m_freem(control); 929 m_freem(m); 930 return (error); 931 } 932 933 struct pr_usrreqs rip6_usrreqs = { 934 .pru_abort = rip6_abort, 935 .pru_attach = rip6_attach, 936 .pru_bind = rip6_bind, 937 .pru_connect = rip6_connect, 938 .pru_control = in6_control, 939 .pru_detach = rip6_detach, 940 .pru_disconnect = rip6_disconnect, 941 .pru_peeraddr = in6_getpeeraddr, 942 .pru_send = rip6_send, 943 .pru_shutdown = rip6_shutdown, 944 .pru_sockaddr = in6_getsockaddr, 945 .pru_close = rip6_close, 946 }; 947