Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet6/raw_ip6.c
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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 70 #include <sys/param.h> 71 #include <sys/errno.h> 72 #include <sys/jail.h> 73 #include <sys/kernel.h> 74 #include <sys/lock.h> 75 #include <sys/malloc.h> 76 #include <sys/mbuf.h> 77 #include <sys/priv.h> 78 #include <sys/proc.h> 79 #include <sys/protosw.h> 80 #include <sys/signalvar.h> 81 #include <sys/socket.h> 82 #include <sys/socketvar.h> 83 #include <sys/sx.h> 84 #include <sys/syslog.h> 85 86 #include <net/if.h> 87 #include <net/if_var.h> 88 #include <net/if_types.h> 89 #include <net/route.h> 90 #include <net/vnet.h> 91 92 #include <netinet/in.h> 93 #include <netinet/in_var.h> 94 #include <netinet/in_systm.h> 95 #include <netinet/in_pcb.h> 96 97 #include <netinet/icmp6.h> 98 #include <netinet/ip6.h> 99 #include <netinet/ip_var.h> 100 #include <netinet6/ip6protosw.h> 101 #include <netinet6/ip6_mroute.h> 102 #include <netinet6/in6_pcb.h> 103 #include <netinet6/ip6_var.h> 104 #include <netinet6/nd6.h> 105 #include <netinet6/raw_ip6.h> 106 #include <netinet6/scope6_var.h> 107 #include <netinet6/send.h> 108 109 #include <netipsec/ipsec_support.h> 110 111 #include <machine/stdarg.h> 112 113 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 VNET_DECLARE(struct inpcbhead, ripcb); 121 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 122 #define V_ripcb VNET(ripcb) 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 /* 155 * Setup generic address and protocol structures for raw_input routine, then 156 * pass them along with mbuf chain. 157 */ 158 int 159 rip6_input(struct mbuf **mp, int *offp, int proto) 160 { 161 struct ifnet *ifp; 162 struct mbuf *m = *mp; 163 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 164 struct inpcb *inp; 165 struct inpcb *last = NULL; 166 struct mbuf *opts = NULL; 167 struct sockaddr_in6 fromsa; 168 struct epoch_tracker et; 169 170 RIP6STAT_INC(rip6s_ipackets); 171 172 init_sin6(&fromsa, m, 0); /* general init */ 173 174 ifp = m->m_pkthdr.rcvif; 175 176 INP_INFO_RLOCK_ET(&V_ripcbinfo, et); 177 CK_LIST_FOREACH(inp, &V_ripcb, inp_list) { 178 /* XXX inp locking */ 179 if ((inp->inp_vflag & INP_IPV6) == 0) 180 continue; 181 if (inp->inp_ip_p && 182 inp->inp_ip_p != proto) 183 continue; 184 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 185 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 186 continue; 187 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 188 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 189 continue; 190 if (last != NULL) { 191 struct mbuf *n = m_copym(m, 0, M_COPYALL, M_NOWAIT); 192 193 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 194 /* 195 * Check AH/ESP integrity. 196 */ 197 if (IPSEC_ENABLED(ipv6)) { 198 if (n != NULL && 199 IPSEC_CHECK_POLICY(ipv6, n, last) != 0) { 200 m_freem(n); 201 /* Do not inject data into pcb. */ 202 n = NULL; 203 } 204 } 205 #endif /* IPSEC */ 206 if (n) { 207 if (last->inp_flags & INP_CONTROLOPTS || 208 last->inp_socket->so_options & SO_TIMESTAMP) 209 ip6_savecontrol(last, n, &opts); 210 /* strip intermediate headers */ 211 m_adj(n, *offp); 212 if (sbappendaddr(&last->inp_socket->so_rcv, 213 (struct sockaddr *)&fromsa, 214 n, opts) == 0) { 215 soroverflow(last->inp_socket); 216 m_freem(n); 217 if (opts) 218 m_freem(opts); 219 RIP6STAT_INC(rip6s_fullsock); 220 } else 221 sorwakeup(last->inp_socket); 222 opts = NULL; 223 } 224 INP_RUNLOCK(last); 225 last = NULL; 226 } 227 INP_RLOCK(inp); 228 if (__predict_false(inp->inp_flags2 & INP_FREED)) 229 goto skip_2; 230 if (jailed_without_vnet(inp->inp_cred)) { 231 /* 232 * Allow raw socket in jail to receive multicast; 233 * assume process had PRIV_NETINET_RAW at attach, 234 * and fall through into normal filter path if so. 235 */ 236 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 237 prison_check_ip6(inp->inp_cred, 238 &ip6->ip6_dst) != 0) 239 goto skip_2; 240 } 241 if (inp->in6p_cksum != -1) { 242 RIP6STAT_INC(rip6s_isum); 243 if (m->m_pkthdr.len - (*offp + inp->in6p_cksum) < 2 || 244 in6_cksum(m, proto, *offp, 245 m->m_pkthdr.len - *offp)) { 246 RIP6STAT_INC(rip6s_badsum); 247 /* 248 * Drop the received message, don't send an 249 * ICMP6 message. Set proto to IPPROTO_NONE 250 * to achieve that. 251 */ 252 proto = IPPROTO_NONE; 253 goto skip_2; 254 } 255 } 256 /* 257 * If this raw socket has multicast state, and we 258 * have received a multicast, check if this socket 259 * should receive it, as multicast filtering is now 260 * the responsibility of the transport layer. 261 */ 262 if (inp->in6p_moptions && 263 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 264 /* 265 * If the incoming datagram is for MLD, allow it 266 * through unconditionally to the raw socket. 267 * 268 * Use the M_RTALERT_MLD flag to check for MLD 269 * traffic without having to inspect the mbuf chain 270 * more deeply, as all MLDv1/v2 host messages MUST 271 * contain the Router Alert option. 272 * 273 * In the case of MLDv1, we may not have explicitly 274 * joined the group, and may have set IFF_ALLMULTI 275 * on the interface. im6o_mc_filter() may discard 276 * control traffic we actually need to see. 277 * 278 * Userland multicast routing daemons should continue 279 * filter the control traffic appropriately. 280 */ 281 int blocked; 282 283 blocked = MCAST_PASS; 284 if ((m->m_flags & M_RTALERT_MLD) == 0) { 285 struct sockaddr_in6 mcaddr; 286 287 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 288 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 289 mcaddr.sin6_family = AF_INET6; 290 mcaddr.sin6_addr = ip6->ip6_dst; 291 292 blocked = im6o_mc_filter(inp->in6p_moptions, 293 ifp, 294 (struct sockaddr *)&mcaddr, 295 (struct sockaddr *)&fromsa); 296 } 297 if (blocked != MCAST_PASS) { 298 IP6STAT_INC(ip6s_notmember); 299 goto skip_2; 300 } 301 } 302 last = inp; 303 continue; 304 skip_2: 305 INP_RUNLOCK(inp); 306 } 307 INP_INFO_RUNLOCK_ET(&V_ripcbinfo, et); 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 soroverflow(last->inp_socket); 329 m_freem(m); 330 if (opts) 331 m_freem(opts); 332 RIP6STAT_INC(rip6s_fullsock); 333 } else 334 sorwakeup(last->inp_socket); 335 INP_RUNLOCK(last); 336 } else { 337 RIP6STAT_INC(rip6s_nosock); 338 if (m->m_flags & M_MCAST) 339 RIP6STAT_INC(rip6s_nosockmcast); 340 if (proto == IPPROTO_NONE) 341 m_freem(m); 342 else 343 icmp6_error(m, ICMP6_PARAM_PROB, 344 ICMP6_PARAMPROB_NEXTHEADER, 345 ip6_get_prevhdr(m, *offp)); 346 IP6STAT_DEC(ip6s_delivered); 347 } 348 return (IPPROTO_DONE); 349 } 350 351 void 352 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 353 { 354 struct ip6ctlparam *ip6cp = NULL; 355 const struct sockaddr_in6 *sa6_src = NULL; 356 void *cmdarg; 357 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 358 359 if (sa->sa_family != AF_INET6 || 360 sa->sa_len != sizeof(struct sockaddr_in6)) 361 return; 362 363 if ((unsigned)cmd >= PRC_NCMDS) 364 return; 365 if (PRC_IS_REDIRECT(cmd)) 366 notify = in6_rtchange, d = NULL; 367 else if (cmd == PRC_HOSTDEAD) 368 d = NULL; 369 else if (inet6ctlerrmap[cmd] == 0) 370 return; 371 372 /* 373 * If the parameter is from icmp6, decode it. 374 */ 375 if (d != NULL) { 376 ip6cp = (struct ip6ctlparam *)d; 377 cmdarg = ip6cp->ip6c_cmdarg; 378 sa6_src = ip6cp->ip6c_src; 379 } else { 380 cmdarg = NULL; 381 sa6_src = &sa6_any; 382 } 383 384 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 385 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 386 } 387 388 /* 389 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 390 * may have setup with control call. 391 */ 392 int 393 rip6_output(struct mbuf *m, struct socket *so, ...) 394 { 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 /* 468 * Source address selection. 469 */ 470 error = in6_selectsrc_socket(dstsock, optp, inp, so->so_cred, 471 scope_ambiguous, &in6a, &hlim); 472 473 if (error) 474 goto bad; 475 error = prison_check_ip6(inp->inp_cred, &in6a); 476 if (error != 0) 477 goto bad; 478 ip6->ip6_src = in6a; 479 480 ip6->ip6_dst = dstsock->sin6_addr; 481 482 /* 483 * Fill in the rest of the IPv6 header fields. 484 */ 485 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 486 (inp->inp_flow & IPV6_FLOWINFO_MASK); 487 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 488 (IPV6_VERSION & IPV6_VERSION_MASK); 489 490 /* 491 * ip6_plen will be filled in ip6_output, so not fill it here. 492 */ 493 ip6->ip6_nxt = inp->inp_ip_p; 494 ip6->ip6_hlim = hlim; 495 496 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 497 inp->in6p_cksum != -1) { 498 struct mbuf *n; 499 int off; 500 u_int16_t *p; 501 502 /* Compute checksum. */ 503 if (so->so_proto->pr_protocol == 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 so->so_proto->pr_protocol == 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 error = ip6_output(m, optp, NULL, 0, inp->in6p_moptions, &oifp, inp); 543 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 544 if (oifp) 545 icmp6_ifoutstat_inc(oifp, type, code); 546 ICMP6STAT_INC(icp6s_outhist[type]); 547 } else 548 RIP6STAT_INC(rip6s_opackets); 549 550 goto freectl; 551 552 bad: 553 if (m) 554 m_freem(m); 555 556 freectl: 557 if (control != NULL) { 558 ip6_clearpktopts(&opt, -1); 559 m_freem(control); 560 } 561 INP_WUNLOCK(inp); 562 return (error); 563 } 564 565 /* 566 * Raw IPv6 socket option processing. 567 */ 568 int 569 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 570 { 571 struct inpcb *inp; 572 int error; 573 574 if (sopt->sopt_level == IPPROTO_ICMPV6) 575 /* 576 * XXX: is it better to call icmp6_ctloutput() directly 577 * from protosw? 578 */ 579 return (icmp6_ctloutput(so, sopt)); 580 else if (sopt->sopt_level != IPPROTO_IPV6) { 581 if (sopt->sopt_level == SOL_SOCKET && 582 sopt->sopt_name == SO_SETFIB) { 583 inp = sotoinpcb(so); 584 INP_WLOCK(inp); 585 inp->inp_inc.inc_fibnum = so->so_fibnum; 586 INP_WUNLOCK(inp); 587 return (0); 588 } 589 return (EINVAL); 590 } 591 592 error = 0; 593 594 switch (sopt->sopt_dir) { 595 case SOPT_GET: 596 switch (sopt->sopt_name) { 597 case MRT6_INIT: 598 case MRT6_DONE: 599 case MRT6_ADD_MIF: 600 case MRT6_DEL_MIF: 601 case MRT6_ADD_MFC: 602 case MRT6_DEL_MFC: 603 case MRT6_PIM: 604 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 605 EOPNOTSUPP; 606 break; 607 case IPV6_CHECKSUM: 608 error = ip6_raw_ctloutput(so, sopt); 609 break; 610 default: 611 error = ip6_ctloutput(so, sopt); 612 break; 613 } 614 break; 615 616 case SOPT_SET: 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_set ? ip6_mrouter_set(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 } 637 638 return (error); 639 } 640 641 static int 642 rip6_attach(struct socket *so, int proto, struct thread *td) 643 { 644 struct inpcb *inp; 645 struct icmp6_filter *filter; 646 int error; 647 648 inp = sotoinpcb(so); 649 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 650 651 error = priv_check(td, PRIV_NETINET_RAW); 652 if (error) 653 return (error); 654 error = soreserve(so, rip_sendspace, rip_recvspace); 655 if (error) 656 return (error); 657 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 658 if (filter == NULL) 659 return (ENOMEM); 660 INP_INFO_WLOCK(&V_ripcbinfo); 661 error = in_pcballoc(so, &V_ripcbinfo); 662 if (error) { 663 INP_INFO_WUNLOCK(&V_ripcbinfo); 664 free(filter, M_PCB); 665 return (error); 666 } 667 inp = (struct inpcb *)so->so_pcb; 668 INP_INFO_WUNLOCK(&V_ripcbinfo); 669 inp->inp_vflag |= INP_IPV6; 670 inp->inp_ip_p = (long)proto; 671 inp->in6p_hops = -1; /* use kernel default */ 672 inp->in6p_cksum = -1; 673 inp->in6p_icmp6filt = filter; 674 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 675 INP_WUNLOCK(inp); 676 return (0); 677 } 678 679 static void 680 rip6_detach(struct socket *so) 681 { 682 struct inpcb *inp; 683 684 inp = sotoinpcb(so); 685 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 686 687 if (so == V_ip6_mrouter && ip6_mrouter_done) 688 ip6_mrouter_done(); 689 /* xxx: RSVP */ 690 INP_INFO_WLOCK(&V_ripcbinfo); 691 INP_WLOCK(inp); 692 free(inp->in6p_icmp6filt, M_PCB); 693 in_pcbdetach(inp); 694 in_pcbfree(inp); 695 INP_INFO_WUNLOCK(&V_ripcbinfo); 696 } 697 698 /* XXXRW: This can't ever be called. */ 699 static void 700 rip6_abort(struct socket *so) 701 { 702 struct inpcb *inp; 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; 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 inpcb *inp; 740 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 741 struct ifaddr *ifa = NULL; 742 int error = 0; 743 744 inp = sotoinpcb(so); 745 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 746 747 if (nam->sa_len != sizeof(*addr)) 748 return (EINVAL); 749 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 750 return (error); 751 if (CK_STAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 752 return (EADDRNOTAVAIL); 753 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 754 return (error); 755 756 NET_EPOCH_ENTER(); 757 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 758 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 759 NET_EPOCH_EXIT(); 760 return (EADDRNOTAVAIL); 761 } 762 if (ifa != NULL && 763 ((struct in6_ifaddr *)ifa)->ia6_flags & 764 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 765 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 766 NET_EPOCH_EXIT(); 767 return (EADDRNOTAVAIL); 768 } 769 NET_EPOCH_EXIT(); 770 INP_INFO_WLOCK(&V_ripcbinfo); 771 INP_WLOCK(inp); 772 inp->in6p_laddr = addr->sin6_addr; 773 INP_WUNLOCK(inp); 774 INP_INFO_WUNLOCK(&V_ripcbinfo); 775 return (0); 776 } 777 778 static int 779 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 780 { 781 struct inpcb *inp; 782 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 783 struct in6_addr in6a; 784 int error = 0, scope_ambiguous = 0; 785 786 inp = sotoinpcb(so); 787 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 788 789 if (nam->sa_len != sizeof(*addr)) 790 return (EINVAL); 791 if (CK_STAILQ_EMPTY(&V_ifnet)) 792 return (EADDRNOTAVAIL); 793 if (addr->sin6_family != AF_INET6) 794 return (EAFNOSUPPORT); 795 796 /* 797 * Application should provide a proper zone ID or the use of default 798 * zone IDs should be enabled. Unfortunately, some applications do 799 * not behave as it should, so we need a workaround. Even if an 800 * appropriate ID is not determined, we'll see if we can determine 801 * the outgoing interface. If we can, determine the zone ID based on 802 * the interface below. 803 */ 804 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 805 scope_ambiguous = 1; 806 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 807 return (error); 808 809 INP_INFO_WLOCK(&V_ripcbinfo); 810 INP_WLOCK(inp); 811 /* Source address selection. XXX: need pcblookup? */ 812 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 813 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 814 if (error) { 815 INP_WUNLOCK(inp); 816 INP_INFO_WUNLOCK(&V_ripcbinfo); 817 return (error); 818 } 819 820 inp->in6p_faddr = addr->sin6_addr; 821 inp->in6p_laddr = in6a; 822 soisconnected(so); 823 INP_WUNLOCK(inp); 824 INP_INFO_WUNLOCK(&V_ripcbinfo); 825 return (0); 826 } 827 828 static int 829 rip6_shutdown(struct socket *so) 830 { 831 struct inpcb *inp; 832 833 inp = sotoinpcb(so); 834 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 835 836 INP_WLOCK(inp); 837 socantsendmore(so); 838 INP_WUNLOCK(inp); 839 return (0); 840 } 841 842 static int 843 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 844 struct mbuf *control, struct thread *td) 845 { 846 struct inpcb *inp; 847 struct sockaddr_in6 tmp; 848 struct sockaddr_in6 *dst; 849 int ret; 850 851 inp = sotoinpcb(so); 852 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 853 854 /* Always copy sockaddr to avoid overwrites. */ 855 /* Unlocked read. */ 856 if (so->so_state & SS_ISCONNECTED) { 857 if (nam) { 858 m_freem(m); 859 return (EISCONN); 860 } 861 /* XXX */ 862 bzero(&tmp, sizeof(tmp)); 863 tmp.sin6_family = AF_INET6; 864 tmp.sin6_len = sizeof(struct sockaddr_in6); 865 INP_RLOCK(inp); 866 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 867 sizeof(struct in6_addr)); 868 INP_RUNLOCK(inp); 869 dst = &tmp; 870 } else { 871 if (nam == NULL) { 872 m_freem(m); 873 return (ENOTCONN); 874 } 875 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 876 m_freem(m); 877 return (EINVAL); 878 } 879 tmp = *(struct sockaddr_in6 *)nam; 880 dst = &tmp; 881 882 if (dst->sin6_family == AF_UNSPEC) { 883 /* 884 * XXX: we allow this case for backward 885 * compatibility to buggy applications that 886 * rely on old (and wrong) kernel behavior. 887 */ 888 log(LOG_INFO, "rip6 SEND: address family is " 889 "unspec. Assume AF_INET6\n"); 890 dst->sin6_family = AF_INET6; 891 } else if (dst->sin6_family != AF_INET6) { 892 m_freem(m); 893 return(EAFNOSUPPORT); 894 } 895 } 896 ret = rip6_output(m, so, dst, control); 897 return (ret); 898 } 899 900 struct pr_usrreqs rip6_usrreqs = { 901 .pru_abort = rip6_abort, 902 .pru_attach = rip6_attach, 903 .pru_bind = rip6_bind, 904 .pru_connect = rip6_connect, 905 .pru_control = in6_control, 906 .pru_detach = rip6_detach, 907 .pru_disconnect = rip6_disconnect, 908 .pru_peeraddr = in6_getpeeraddr, 909 .pru_send = rip6_send, 910 .pru_shutdown = rip6_shutdown, 911 .pru_sockaddr = in6_getsockaddr, 912 .pru_close = rip6_close, 913 };
Cache object: 05ff2b6e26c2da6077f60b804653b57b
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