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 122VNET_DECLARE(struct inpcbhead, ripcb); 123VNET_DECLARE(struct inpcbinfo, ripcbinfo); 124#define V_ripcb VNET(ripcb) 125#define V_ripcbinfo VNET(ripcbinfo) 126 127extern u_long rip_sendspace; 128extern u_long rip_recvspace; 129 130VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 131VNET_PCPUSTAT_SYSINIT(rip6stat); 132 133#ifdef VIMAGE 134VNET_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 */ 145VNET_DEFINE(struct socket *, ip6_mrouter); 146 147/* 148 * The various mrouter functions. 149 */ 150int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 151int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 152int (*ip6_mrouter_done)(void); 153int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 154int (*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 */ 160int 161rip6_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 m_freem(n); 218 if (opts) 219 m_freem(opts); 220 RIP6STAT_INC(rip6s_fullsock); 221 } else 222 sorwakeup(last->inp_socket); 223 opts = NULL; 224 } 225 INP_RUNLOCK(last); 226 last = NULL; 227 } 228 INP_RLOCK(inp); 229 if (__predict_false(inp->inp_flags2 & INP_FREED)) 230 goto skip_2; 231 if (jailed_without_vnet(inp->inp_cred)) { 232 /* 233 * Allow raw socket in jail to receive multicast; 234 * assume process had PRIV_NETINET_RAW at attach, 235 * and fall through into normal filter path if so. 236 */ 237 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 238 prison_check_ip6(inp->inp_cred, 239 &ip6->ip6_dst) != 0) 240 goto skip_2; 241 } 242 if (inp->in6p_cksum != -1) { 243 RIP6STAT_INC(rip6s_isum); 244 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 || 245 in6_cksum(m, proto, *offp, 246 m->m_pkthdr.len - *offp)) { 247 RIP6STAT_INC(rip6s_badsum); 248 /* 249 * Drop the received message, don't send an 250 * ICMP6 message. Set proto to IPPROTO_NONE 251 * to achieve that. 252 */ 253 proto = IPPROTO_NONE; 254 goto skip_2; 255 } 256 } 257 /* 258 * If this raw socket has multicast state, and we 259 * have received a multicast, check if this socket 260 * should receive it, as multicast filtering is now 261 * the responsibility of the transport layer. 262 */ 263 if (inp->in6p_moptions && 264 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 265 /* 266 * If the incoming datagram is for MLD, allow it 267 * through unconditionally to the raw socket. 268 * 269 * Use the M_RTALERT_MLD flag to check for MLD 270 * traffic without having to inspect the mbuf chain 271 * more deeply, as all MLDv1/v2 host messages MUST 272 * contain the Router Alert option. 273 * 274 * In the case of MLDv1, we may not have explicitly 275 * joined the group, and may have set IFF_ALLMULTI 276 * on the interface. im6o_mc_filter() may discard 277 * control traffic we actually need to see. 278 * 279 * Userland multicast routing daemons should continue 280 * filter the control traffic appropriately. 281 */ 282 int blocked; 283 284 blocked = MCAST_PASS; 285 if ((m->m_flags & M_RTALERT_MLD) == 0) { 286 struct sockaddr_in6 mcaddr; 287 288 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 289 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 290 mcaddr.sin6_family = AF_INET6; 291 mcaddr.sin6_addr = ip6->ip6_dst; 292 293 blocked = im6o_mc_filter(inp->in6p_moptions, 294 ifp, 295 (struct sockaddr *)&mcaddr, 296 (struct sockaddr *)&fromsa); 297 } 298 if (blocked != MCAST_PASS) { 299 IP6STAT_INC(ip6s_notmember); 300 goto skip_2; 301 } 302 } 303 last = inp; 304 continue; 305skip_2: 306 INP_RUNLOCK(inp); 307 } 308#if defined(IPSEC) || defined(IPSEC_SUPPORT) 309 /* 310 * Check AH/ESP integrity. 311 */ 312 if (IPSEC_ENABLED(ipv6) && last != NULL && 313 IPSEC_CHECK_POLICY(ipv6, m, last) != 0) { 314 m_freem(m); 315 IP6STAT_DEC(ip6s_delivered); 316 /* Do not inject data into pcb. */ 317 INP_RUNLOCK(last); 318 } else 319#endif /* IPSEC */ 320 if (last != NULL) { 321 if (last->inp_flags & INP_CONTROLOPTS || 322 last->inp_socket->so_options & SO_TIMESTAMP) 323 ip6_savecontrol(last, m, &opts); 324 /* Strip intermediate headers. */ 325 m_adj(m, *offp); 326 if (sbappendaddr(&last->inp_socket->so_rcv, 327 (struct sockaddr *)&fromsa, m, opts) == 0) { 328 m_freem(m); 329 if (opts) 330 m_freem(opts); 331 RIP6STAT_INC(rip6s_fullsock); 332 } else 333 sorwakeup(last->inp_socket); 334 INP_RUNLOCK(last); 335 } else { 336 RIP6STAT_INC(rip6s_nosock); 337 if (m->m_flags & M_MCAST) 338 RIP6STAT_INC(rip6s_nosockmcast); 339 if (proto == IPPROTO_NONE) 340 m_freem(m); 341 else 342 icmp6_error(m, ICMP6_PARAM_PROB, 343 ICMP6_PARAMPROB_NEXTHEADER, 344 ip6_get_prevhdr(m, *offp)); 345 IP6STAT_DEC(ip6s_delivered); 346 } 347 return (IPPROTO_DONE); 348} 349 350void 351rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 352{ 353 struct ip6ctlparam *ip6cp = NULL; 354 const struct sockaddr_in6 *sa6_src = NULL; 355 void *cmdarg; 356 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 357 358 if (sa->sa_family != AF_INET6 || 359 sa->sa_len != sizeof(struct sockaddr_in6)) 360 return; 361 362 if ((unsigned)cmd >= PRC_NCMDS) 363 return; 364 if (PRC_IS_REDIRECT(cmd)) 365 notify = in6_rtchange, d = NULL; 366 else if (cmd == PRC_HOSTDEAD) 367 d = NULL; 368 else if (inet6ctlerrmap[cmd] == 0) 369 return; 370 371 /* 372 * If the parameter is from icmp6, decode it. 373 */ 374 if (d != NULL) { 375 ip6cp = (struct ip6ctlparam *)d; 376 cmdarg = ip6cp->ip6c_cmdarg; 377 sa6_src = ip6cp->ip6c_src; 378 } else { 379 cmdarg = NULL; 380 sa6_src = &sa6_any; 381 } 382 383 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 384 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 385} 386 387/* 388 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 389 * may have setup with control call. 390 */ 391int 392rip6_output(struct mbuf *m, struct socket *so, ...) 393{ 394 struct epoch_tracker et; 395 struct mbuf *control; 396 struct m_tag *mtag; 397 struct sockaddr_in6 *dstsock; 398 struct ip6_hdr *ip6; 399 struct inpcb *inp; 400 u_int plen = m->m_pkthdr.len; 401 int error = 0; 402 struct ip6_pktopts opt, *optp; 403 struct ifnet *oifp = NULL; 404 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 405 int scope_ambiguous = 0; 406 int use_defzone = 0; 407 int hlim = 0; 408 struct in6_addr in6a; 409 va_list ap; 410 411 va_start(ap, so); 412 dstsock = va_arg(ap, struct sockaddr_in6 *); 413 control = va_arg(ap, struct mbuf *); 414 va_end(ap); 415 416 inp = sotoinpcb(so); 417 INP_WLOCK(inp); 418 419 if (control != NULL) { 420 if ((error = ip6_setpktopts(control, &opt, 421 inp->in6p_outputopts, so->so_cred, 422 so->so_proto->pr_protocol)) != 0) { 423 goto bad; 424 } 425 optp = &opt; 426 } else 427 optp = inp->in6p_outputopts; 428 429 /* 430 * Check and convert scope zone ID into internal form. 431 * 432 * XXX: we may still need to determine the zone later. 433 */ 434 if (!(so->so_state & SS_ISCONNECTED)) { 435 if (!optp || !optp->ip6po_pktinfo || 436 !optp->ip6po_pktinfo->ipi6_ifindex) 437 use_defzone = V_ip6_use_defzone; 438 if (dstsock->sin6_scope_id == 0 && !use_defzone) 439 scope_ambiguous = 1; 440 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 441 goto bad; 442 } 443 444 /* 445 * For an ICMPv6 packet, we should know its type and code to update 446 * statistics. 447 */ 448 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 449 struct icmp6_hdr *icmp6; 450 if (m->m_len < sizeof(struct icmp6_hdr) && 451 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 452 error = ENOBUFS; 453 goto bad; 454 } 455 icmp6 = mtod(m, struct icmp6_hdr *); 456 type = icmp6->icmp6_type; 457 code = icmp6->icmp6_code; 458 } 459 460 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 461 if (m == NULL) { 462 error = ENOBUFS; 463 goto bad; 464 } 465 ip6 = mtod(m, struct ip6_hdr *); 466 467#ifdef ROUTE_MPATH 468 if (CALC_FLOWID_OUTBOUND) { 469 uint32_t hash_type, hash_val; 470 471 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 472 &dstsock->sin6_addr, 0, 0, so->so_proto->pr_protocol, 473 &hash_type); 474 inp->inp_flowid = hash_val; 475 inp->inp_flowtype = hash_type; 476 } 477#endif 478 /* 479 * Source address selection. 480 */ 481 NET_EPOCH_ENTER(et); 482 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 483 scope_ambiguous, &in6a, &hlim); 484 NET_EPOCH_EXIT(et); 485 486 if (error) 487 goto bad; 488 error = prison_check_ip6(inp->inp_cred, &in6a); 489 if (error != 0) 490 goto bad; 491 ip6->ip6_src = in6a; 492 493 ip6->ip6_dst = dstsock->sin6_addr; 494 495 /* 496 * Fill in the rest of the IPv6 header fields. 497 */ 498 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 499 (inp->inp_flow & IPV6_FLOWINFO_MASK); 500 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 501 (IPV6_VERSION & IPV6_VERSION_MASK); 502 503 /* 504 * ip6_plen will be filled in ip6_output, so not fill it here. 505 */ 506 ip6->ip6_nxt = inp->inp_ip_p; 507 ip6->ip6_hlim = hlim; 508 509 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 510 inp->in6p_cksum != -1) { 511 struct mbuf *n; 512 int off; 513 u_int16_t *p; 514 515 /* Compute checksum. */ 516 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 517 off = offsetof(struct icmp6_hdr, icmp6_cksum); 518 else 519 off = inp->in6p_cksum; 520 if (plen < off + 2) { 521 error = EINVAL; 522 goto bad; 523 } 524 off += sizeof(struct ip6_hdr); 525 526 n = m; 527 while (n && n->m_len <= off) { 528 off -= n->m_len; 529 n = n->m_next; 530 } 531 if (!n) 532 goto bad; 533 p = (u_int16_t *)(mtod(n, caddr_t) + off); 534 *p = 0; 535 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 536 } 537 538 /* 539 * Send RA/RS messages to user land for protection, before sending 540 * them to rtadvd/rtsol. 541 */ 542 if ((send_sendso_input_hook != NULL) && 543 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 544 switch (type) { 545 case ND_ROUTER_ADVERT: 546 case ND_ROUTER_SOLICIT: 547 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 548 sizeof(unsigned short), M_NOWAIT); 549 if (mtag == NULL) 550 goto bad; 551 m_tag_prepend(m, mtag); 552 } 553 } 554 555 NET_EPOCH_ENTER(et); 556 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 557 NET_EPOCH_EXIT(et); 558 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 559 if (oifp) 560 icmp6_ifoutstat_inc(oifp, type, code); 561 ICMP6STAT_INC(icp6s_outhist[type]); 562 } else 563 RIP6STAT_INC(rip6s_opackets); 564 565 goto freectl; 566 567 bad: 568 if (m) 569 m_freem(m); 570 571 freectl: 572 if (control != NULL) { 573 ip6_clearpktopts(&opt, -1); 574 m_freem(control); 575 } 576 INP_WUNLOCK(inp); 577 return (error); 578} 579 580/* 581 * Raw IPv6 socket option processing. 582 */ 583int 584rip6_ctloutput(struct socket *so, struct sockopt *sopt) 585{ 586 struct inpcb *inp; 587 int error; 588 589 if (sopt->sopt_level == IPPROTO_ICMPV6) 590 /* 591 * XXX: is it better to call icmp6_ctloutput() directly 592 * from protosw? 593 */ 594 return (icmp6_ctloutput(so, sopt)); 595 else if (sopt->sopt_level != IPPROTO_IPV6) { 596 if (sopt->sopt_level == SOL_SOCKET && 597 sopt->sopt_name == SO_SETFIB) { 598 inp = sotoinpcb(so); 599 INP_WLOCK(inp); 600 inp->inp_inc.inc_fibnum = so->so_fibnum; 601 INP_WUNLOCK(inp); 602 return (0); 603 } 604 return (EINVAL); 605 } 606 607 error = 0; 608 609 switch (sopt->sopt_dir) { 610 case SOPT_GET: 611 switch (sopt->sopt_name) { 612 case MRT6_INIT: 613 case MRT6_DONE: 614 case MRT6_ADD_MIF: 615 case MRT6_DEL_MIF: 616 case MRT6_ADD_MFC: 617 case MRT6_DEL_MFC: 618 case MRT6_PIM: 619 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 620 EOPNOTSUPP; 621 break; 622 case IPV6_CHECKSUM: 623 error = ip6_raw_ctloutput(so, sopt); 624 break; 625 default: 626 error = ip6_ctloutput(so, sopt); 627 break; 628 } 629 break; 630 631 case SOPT_SET: 632 switch (sopt->sopt_name) { 633 case MRT6_INIT: 634 case MRT6_DONE: 635 case MRT6_ADD_MIF: 636 case MRT6_DEL_MIF: 637 case MRT6_ADD_MFC: 638 case MRT6_DEL_MFC: 639 case MRT6_PIM: 640 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 641 EOPNOTSUPP; 642 break; 643 case IPV6_CHECKSUM: 644 error = ip6_raw_ctloutput(so, sopt); 645 break; 646 default: 647 error = ip6_ctloutput(so, sopt); 648 break; 649 } 650 break; 651 } 652 653 return (error); 654} 655 656static int 657rip6_attach(struct socket *so, int proto, struct thread *td) 658{ 659 struct inpcb *inp; 660 struct icmp6_filter *filter; 661 int error; 662 663 inp = sotoinpcb(so); 664 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 665 666 error = priv_check(td, PRIV_NETINET_RAW); 667 if (error) 668 return (error); 669 error = soreserve(so, rip_sendspace, rip_recvspace); 670 if (error) 671 return (error); 672 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 673 if (filter == NULL) 674 return (ENOMEM); 675 INP_INFO_WLOCK(&V_ripcbinfo); 676 error = in_pcballoc(so, &V_ripcbinfo); 677 if (error) { 678 INP_INFO_WUNLOCK(&V_ripcbinfo); 679 free(filter, M_PCB); 680 return (error); 681 } 682 inp = (struct inpcb *)so->so_pcb; 683 INP_INFO_WUNLOCK(&V_ripcbinfo); 684 inp->inp_vflag |= INP_IPV6; 685 inp->inp_ip_p = (long)proto; 686 inp->in6p_hops = -1; /* use kernel default */ 687 inp->in6p_cksum = -1; 688 inp->in6p_icmp6filt = filter; 689 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 690 INP_WUNLOCK(inp); 691 return (0); 692} 693 694static void 695rip6_detach(struct socket *so) 696{ 697 struct inpcb *inp; 698 699 inp = sotoinpcb(so); 700 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 701 702 if (so == V_ip6_mrouter && ip6_mrouter_done) 703 ip6_mrouter_done(); 704 /* xxx: RSVP */ 705 INP_INFO_WLOCK(&V_ripcbinfo); 706 INP_WLOCK(inp); 707 free(inp->in6p_icmp6filt, M_PCB); 708 in_pcbdetach(inp); 709 in_pcbfree(inp); 710 INP_INFO_WUNLOCK(&V_ripcbinfo); 711} 712 713/* XXXRW: This can't ever be called. */ 714static void 715rip6_abort(struct socket *so) 716{ 717 struct inpcb *inp; 718 719 inp = sotoinpcb(so); 720 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 721 722 soisdisconnected(so); 723} 724 725static void 726rip6_close(struct socket *so) 727{ 728 struct inpcb *inp; 729 730 inp = sotoinpcb(so); 731 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 732 733 soisdisconnected(so); 734} 735 736static int 737rip6_disconnect(struct socket *so) 738{ 739 struct inpcb *inp; 740 741 inp = sotoinpcb(so); 742 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 743 744 if ((so->so_state & SS_ISCONNECTED) == 0) 745 return (ENOTCONN); 746 inp->in6p_faddr = in6addr_any; 747 rip6_abort(so); 748 return (0); 749} 750 751static int 752rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 753{ 754 struct epoch_tracker et; 755 struct inpcb *inp; 756 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 757 struct ifaddr *ifa = NULL; 758 int error = 0; 759 760 inp = sotoinpcb(so); 761 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 762 763 if (nam->sa_family != AF_INET6) 764 return (EAFNOSUPPORT); 765 if (nam->sa_len != sizeof(*addr)) 766 return (EINVAL); 767 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 768 return (error); 769 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 770 return (EADDRNOTAVAIL); 771 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 772 return (error); 773 774 NET_EPOCH_ENTER(et); 775 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 776 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 777 NET_EPOCH_EXIT(et); 778 return (EADDRNOTAVAIL); 779 } 780 if (ifa != NULL && 781 ((struct in6_ifaddr *)ifa)->ia6_flags & 782 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 783 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 784 NET_EPOCH_EXIT(et); 785 return (EADDRNOTAVAIL); 786 } 787 NET_EPOCH_EXIT(et); 788 INP_INFO_WLOCK(&V_ripcbinfo); 789 INP_WLOCK(inp); 790 inp->in6p_laddr = addr->sin6_addr; 791 INP_WUNLOCK(inp); 792 INP_INFO_WUNLOCK(&V_ripcbinfo); 793 return (0); 794} 795 796static int 797rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 798{ 799 struct inpcb *inp; 800 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 801 struct in6_addr in6a; 802 struct epoch_tracker et; 803 int error = 0, scope_ambiguous = 0; 804 805 inp = sotoinpcb(so); 806 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 807 808 if (nam->sa_len != sizeof(*addr)) 809 return (EINVAL); 810 if (CK_STAILQ_EMPTY(&V_ifnet)) 811 return (EADDRNOTAVAIL); 812 if (addr->sin6_family != AF_INET6) 813 return (EAFNOSUPPORT); 814 815 /* 816 * Application should provide a proper zone ID or the use of default 817 * zone IDs should be enabled. Unfortunately, some applications do 818 * not behave as it should, so we need a workaround. Even if an 819 * appropriate ID is not determined, we'll see if we can determine 820 * the outgoing interface. If we can, determine the zone ID based on 821 * the interface below. 822 */ 823 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 824 scope_ambiguous = 1; 825 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 826 return (error); 827 828 INP_INFO_WLOCK(&V_ripcbinfo); 829 INP_WLOCK(inp); 830 /* Source address selection. XXX: need pcblookup? */ 831 NET_EPOCH_ENTER(et); 832 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 833 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 834 NET_EPOCH_EXIT(et); 835 if (error) { 836 INP_WUNLOCK(inp); 837 INP_INFO_WUNLOCK(&V_ripcbinfo); 838 return (error); 839 } 840 841 inp->in6p_faddr = addr->sin6_addr; 842 inp->in6p_laddr = in6a; 843 soisconnected(so); 844 INP_WUNLOCK(inp); 845 INP_INFO_WUNLOCK(&V_ripcbinfo); 846 return (0); 847} 848 849static int 850rip6_shutdown(struct socket *so) 851{ 852 struct inpcb *inp; 853 854 inp = sotoinpcb(so); 855 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 856 857 INP_WLOCK(inp); 858 socantsendmore(so); 859 INP_WUNLOCK(inp); 860 return (0); 861} 862 863static int 864rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 865 struct mbuf *control, struct thread *td) 866{ 867 struct inpcb *inp; 868 struct sockaddr_in6 tmp; 869 struct sockaddr_in6 *dst; 870 int error; 871 872 inp = sotoinpcb(so); 873 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 874 875 /* Always copy sockaddr to avoid overwrites. */ 876 /* Unlocked read. */ 877 if (so->so_state & SS_ISCONNECTED) { 878 if (nam) { 879 error = EISCONN; 880 goto release; 881 } 882 /* XXX */ 883 bzero(&tmp, sizeof(tmp)); 884 tmp.sin6_family = AF_INET6; 885 tmp.sin6_len = sizeof(struct sockaddr_in6); 886 INP_RLOCK(inp); 887 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 888 sizeof(struct in6_addr)); 889 INP_RUNLOCK(inp); 890 dst = &tmp; 891 } else { 892 error = 0; 893 if (nam == NULL) 894 error = ENOTCONN; 895 else if (nam->sa_family != AF_INET6) 896 error = EAFNOSUPPORT; 897 else if (nam->sa_len != sizeof(struct sockaddr_in6)) 898 error = EINVAL; 899 if (error != 0) 900 goto release; 901 tmp = *(struct sockaddr_in6 *)nam; 902 dst = &tmp; 903 904 if (dst->sin6_family == AF_UNSPEC) { 905 /* 906 * XXX: we allow this case for backward 907 * compatibility to buggy applications that 908 * rely on old (and wrong) kernel behavior. 909 */ 910 log(LOG_INFO, "rip6 SEND: address family is " 911 "unspec. Assume AF_INET6\n"); 912 dst->sin6_family = AF_INET6; 913 } else if (dst->sin6_family != AF_INET6) { 914 error = EAFNOSUPPORT; 915 goto release; 916 } 917 } 918 return (rip6_output(m, so, dst, control)); 919 920release: 921 if (control != NULL) 922 m_freem(control); 923 m_freem(m); 924 return (error); 925} 926 927struct pr_usrreqs rip6_usrreqs = { 928 .pru_abort = rip6_abort, 929 .pru_attach = rip6_attach, 930 .pru_bind = rip6_bind, 931 .pru_connect = rip6_connect, 932 .pru_control = in6_control, 933 .pru_detach = rip6_detach, 934 .pru_disconnect = rip6_disconnect, 935 .pru_peeraddr = in6_getpeeraddr, 936 .pru_send = rip6_send, 937 .pru_shutdown = rip6_shutdown, 938 .pru_sockaddr = in6_getsockaddr, 939 .pru_close = rip6_close, 940}; 941