1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /*- 31 * Copyright (c) 1982, 1986, 1988, 1993 32 * The Regents of the University of California. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 60 */ 61 62 #include <sys/cdefs.h> 63 __FBSDID("$FreeBSD$"); 64 65 #include "opt_ipsec.h" 66 #include "opt_inet6.h" 67 68 #include <sys/param.h> 69 #include <sys/errno.h> 70 #include <sys/jail.h> 71 #include <sys/kernel.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/priv.h> 76 #include <sys/proc.h> 77 #include <sys/protosw.h> 78 #include <sys/signalvar.h> 79 #include <sys/socket.h> 80 #include <sys/socketvar.h> 81 #include <sys/sx.h> 82 #include <sys/syslog.h> 83 84 #include <net/if.h> 85 #include <net/if_var.h> 86 #include <net/if_types.h> 87 #include <net/route.h> 88 #include <net/vnet.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_var.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/in_pcb.h> 94 95 #include <netinet/icmp6.h> 96 #include <netinet/ip6.h> 97 #include <netinet/ip_var.h> 98 #include <netinet6/ip6protosw.h> 99 #include <netinet6/ip6_mroute.h> 100 #include <netinet6/in6_pcb.h> 101 #include <netinet6/ip6_var.h> 102 #include <netinet6/nd6.h> 103 #include <netinet6/raw_ip6.h> 104 #include <netinet6/scope6_var.h> 105 #include <netinet6/send.h> 106 107 #ifdef IPSEC 108 #include <netipsec/ipsec.h> 109 #include <netipsec/ipsec6.h> 110 #endif /* IPSEC */ 111 112 #include <machine/stdarg.h> 113 114 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 115 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 116 117 /* 118 * Raw interface to IP6 protocol. 119 */ 120 121 VNET_DECLARE(struct inpcbhead, ripcb); 122 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 123 #define V_ripcb VNET(ripcb) 124 #define V_ripcbinfo VNET(ripcbinfo) 125 126 extern u_long rip_sendspace; 127 extern u_long rip_recvspace; 128 129 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 130 VNET_PCPUSTAT_SYSINIT(rip6stat); 131 132 #ifdef VIMAGE 133 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 134 #endif /* VIMAGE */ 135 136 /* 137 * Hooks for multicast routing. They all default to NULL, so leave them not 138 * initialized and rely on BSS being set to 0. 139 */ 140 141 /* 142 * The socket used to communicate with the multicast routing daemon. 143 */ 144 VNET_DEFINE(struct socket *, ip6_mrouter); 145 146 /* 147 * The various mrouter functions. 148 */ 149 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 150 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 151 int (*ip6_mrouter_done)(void); 152 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 153 int (*mrt6_ioctl)(u_long, caddr_t); 154 155 /* 156 * Setup generic address and protocol structures for raw_input routine, then 157 * pass them along with mbuf chain. 158 */ 159 int 160 rip6_input(struct mbuf **mp, int *offp, int proto) 161 { 162 struct ifnet *ifp; 163 struct mbuf *m = *mp; 164 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 165 register struct inpcb *in6p; 166 struct inpcb *last = 0; 167 struct mbuf *opts = NULL; 168 struct sockaddr_in6 fromsa; 169 170 RIP6STAT_INC(rip6s_ipackets); 171 172 init_sin6(&fromsa, m); /* general init */ 173 174 ifp = m->m_pkthdr.rcvif; 175 176 INP_INFO_RLOCK(&V_ripcbinfo); 177 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 178 /* XXX inp locking */ 179 if ((in6p->inp_vflag & INP_IPV6) == 0) 180 continue; 181 if (in6p->inp_ip_p && 182 in6p->inp_ip_p != proto) 183 continue; 184 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 185 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 186 continue; 187 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 188 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 189 continue; 190 if (jailed_without_vnet(in6p->inp_cred)) { 191 /* 192 * Allow raw socket in jail to receive multicast; 193 * assume process had PRIV_NETINET_RAW at attach, 194 * and fall through into normal filter path if so. 195 */ 196 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 197 prison_check_ip6(in6p->inp_cred, 198 &ip6->ip6_dst) != 0) 199 continue; 200 } 201 INP_RLOCK(in6p); 202 if (in6p->in6p_cksum != -1) { 203 RIP6STAT_INC(rip6s_isum); 204 if (in6_cksum(m, proto, *offp, 205 m->m_pkthdr.len - *offp)) { 206 INP_RUNLOCK(in6p); 207 RIP6STAT_INC(rip6s_badsum); 208 continue; 209 } 210 } 211 /* 212 * If this raw socket has multicast state, and we 213 * have received a multicast, check if this socket 214 * should receive it, as multicast filtering is now 215 * the responsibility of the transport layer. 216 */ 217 if (in6p->in6p_moptions && 218 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 219 /* 220 * If the incoming datagram is for MLD, allow it 221 * through unconditionally to the raw socket. 222 * 223 * Use the M_RTALERT_MLD flag to check for MLD 224 * traffic without having to inspect the mbuf chain 225 * more deeply, as all MLDv1/v2 host messages MUST 226 * contain the Router Alert option. 227 * 228 * In the case of MLDv1, we may not have explicitly 229 * joined the group, and may have set IFF_ALLMULTI 230 * on the interface. im6o_mc_filter() may discard 231 * control traffic we actually need to see. 232 * 233 * Userland multicast routing daemons should continue 234 * filter the control traffic appropriately. 235 */ 236 int blocked; 237 238 blocked = MCAST_PASS; 239 if ((m->m_flags & M_RTALERT_MLD) == 0) { 240 struct sockaddr_in6 mcaddr; 241 242 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 243 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 244 mcaddr.sin6_family = AF_INET6; 245 mcaddr.sin6_addr = ip6->ip6_dst; 246 247 blocked = im6o_mc_filter(in6p->in6p_moptions, 248 ifp, 249 (struct sockaddr *)&mcaddr, 250 (struct sockaddr *)&fromsa); 251 } 252 if (blocked != MCAST_PASS) { 253 IP6STAT_INC(ip6s_notmember); 254 INP_RUNLOCK(in6p); 255 continue; 256 } 257 } 258 if (last != NULL) { 259 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 260 261 #ifdef IPSEC 262 /* 263 * Check AH/ESP integrity. 264 */ 265 if (n && ipsec6_in_reject(n, last)) { 266 m_freem(n); 267 /* Do not inject data into pcb. */ 268 } else 269 #endif /* IPSEC */ 270 if (n) { 271 if (last->inp_flags & INP_CONTROLOPTS || 272 last->inp_socket->so_options & SO_TIMESTAMP) 273 ip6_savecontrol(last, n, &opts); 274 /* strip intermediate headers */ 275 m_adj(n, *offp); 276 if (sbappendaddr(&last->inp_socket->so_rcv, 277 (struct sockaddr *)&fromsa, 278 n, opts) == 0) { 279 m_freem(n); 280 if (opts) 281 m_freem(opts); 282 RIP6STAT_INC(rip6s_fullsock); 283 } else 284 sorwakeup(last->inp_socket); 285 opts = NULL; 286 } 287 INP_RUNLOCK(last); 288 } 289 last = in6p; 290 } 291 INP_INFO_RUNLOCK(&V_ripcbinfo); 292 #ifdef IPSEC 293 /* 294 * Check AH/ESP integrity. 295 */ 296 if ((last != NULL) && ipsec6_in_reject(m, last)) { 297 m_freem(m); 298 IP6STAT_DEC(ip6s_delivered); 299 /* Do not inject data into pcb. */ 300 INP_RUNLOCK(last); 301 } else 302 #endif /* IPSEC */ 303 if (last != NULL) { 304 if (last->inp_flags & INP_CONTROLOPTS || 305 last->inp_socket->so_options & SO_TIMESTAMP) 306 ip6_savecontrol(last, m, &opts); 307 /* Strip intermediate headers. */ 308 m_adj(m, *offp); 309 if (sbappendaddr(&last->inp_socket->so_rcv, 310 (struct sockaddr *)&fromsa, m, opts) == 0) { 311 m_freem(m); 312 if (opts) 313 m_freem(opts); 314 RIP6STAT_INC(rip6s_fullsock); 315 } else 316 sorwakeup(last->inp_socket); 317 INP_RUNLOCK(last); 318 } else { 319 RIP6STAT_INC(rip6s_nosock); 320 if (m->m_flags & M_MCAST) 321 RIP6STAT_INC(rip6s_nosockmcast); 322 if (proto == IPPROTO_NONE) 323 m_freem(m); 324 else { 325 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 326 icmp6_error(m, ICMP6_PARAM_PROB, 327 ICMP6_PARAMPROB_NEXTHEADER, 328 prvnxtp - mtod(m, char *)); 329 } 330 IP6STAT_DEC(ip6s_delivered); 331 } 332 return (IPPROTO_DONE); 333 } 334 335 void 336 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 337 { 338 struct ip6_hdr *ip6; 339 struct mbuf *m; 340 int off = 0; 341 struct ip6ctlparam *ip6cp = NULL; 342 const struct sockaddr_in6 *sa6_src = NULL; 343 void *cmdarg; 344 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 345 346 if (sa->sa_family != AF_INET6 || 347 sa->sa_len != sizeof(struct sockaddr_in6)) 348 return; 349 350 if ((unsigned)cmd >= PRC_NCMDS) 351 return; 352 if (PRC_IS_REDIRECT(cmd)) 353 notify = in6_rtchange, d = NULL; 354 else if (cmd == PRC_HOSTDEAD) 355 d = NULL; 356 else if (inet6ctlerrmap[cmd] == 0) 357 return; 358 359 /* 360 * If the parameter is from icmp6, decode it. 361 */ 362 if (d != NULL) { 363 ip6cp = (struct ip6ctlparam *)d; 364 m = ip6cp->ip6c_m; 365 ip6 = ip6cp->ip6c_ip6; 366 off = ip6cp->ip6c_off; 367 cmdarg = ip6cp->ip6c_cmdarg; 368 sa6_src = ip6cp->ip6c_src; 369 } else { 370 m = NULL; 371 ip6 = NULL; 372 cmdarg = NULL; 373 sa6_src = &sa6_any; 374 } 375 376 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 377 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 378 } 379 380 /* 381 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 382 * may have setup with control call. 383 */ 384 int 385 rip6_output(struct mbuf *m, struct socket *so, ...) 386 { 387 struct mbuf *control; 388 struct m_tag *mtag; 389 struct sockaddr_in6 *dstsock; 390 struct in6_addr *dst; 391 struct ip6_hdr *ip6; 392 struct inpcb *in6p; 393 u_int plen = m->m_pkthdr.len; 394 int error = 0; 395 struct ip6_pktopts opt, *optp; 396 struct ifnet *oifp = NULL; 397 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 398 int scope_ambiguous = 0; 399 int use_defzone = 0; 400 struct in6_addr in6a; 401 va_list ap; 402 403 va_start(ap, so); 404 dstsock = va_arg(ap, struct sockaddr_in6 *); 405 control = va_arg(ap, struct mbuf *); 406 va_end(ap); 407 408 in6p = sotoinpcb(so); 409 INP_WLOCK(in6p); 410 411 dst = &dstsock->sin6_addr; 412 if (control != NULL) { 413 if ((error = ip6_setpktopts(control, &opt, 414 in6p->in6p_outputopts, so->so_cred, 415 so->so_proto->pr_protocol)) != 0) { 416 goto bad; 417 } 418 optp = &opt; 419 } else 420 optp = in6p->in6p_outputopts; 421 422 /* 423 * Check and convert scope zone ID into internal form. 424 * 425 * XXX: we may still need to determine the zone later. 426 */ 427 if (!(so->so_state & SS_ISCONNECTED)) { 428 if (!optp || !optp->ip6po_pktinfo || 429 !optp->ip6po_pktinfo->ipi6_ifindex) 430 use_defzone = V_ip6_use_defzone; 431 if (dstsock->sin6_scope_id == 0 && !use_defzone) 432 scope_ambiguous = 1; 433 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 434 goto bad; 435 } 436 437 /* 438 * For an ICMPv6 packet, we should know its type and code to update 439 * statistics. 440 */ 441 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 442 struct icmp6_hdr *icmp6; 443 if (m->m_len < sizeof(struct icmp6_hdr) && 444 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 445 error = ENOBUFS; 446 goto bad; 447 } 448 icmp6 = mtod(m, struct icmp6_hdr *); 449 type = icmp6->icmp6_type; 450 code = icmp6->icmp6_code; 451 } 452 453 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 454 if (m == NULL) { 455 error = ENOBUFS; 456 goto bad; 457 } 458 ip6 = mtod(m, struct ip6_hdr *); 459 460 /* 461 * Source address selection. 462 */ 463 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 464 &oifp, &in6a); 465 if (error) 466 goto bad; 467 error = prison_check_ip6(in6p->inp_cred, &in6a); 468 if (error != 0) 469 goto bad; 470 ip6->ip6_src = in6a; 471 472 if (oifp && scope_ambiguous) { 473 /* 474 * Application should provide a proper zone ID or the use of 475 * default zone IDs should be enabled. Unfortunately, some 476 * applications do not behave as it should, so we need a 477 * workaround. Even if an appropriate ID is not determined 478 * (when it's required), if we can determine the outgoing 479 * interface. determine the zone ID based on the interface. 480 */ 481 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 482 if (error != 0) 483 goto bad; 484 } 485 ip6->ip6_dst = dstsock->sin6_addr; 486 487 /* 488 * Fill in the rest of the IPv6 header fields. 489 */ 490 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 491 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 492 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 493 (IPV6_VERSION & IPV6_VERSION_MASK); 494 495 /* 496 * ip6_plen will be filled in ip6_output, so not fill it here. 497 */ 498 ip6->ip6_nxt = in6p->inp_ip_p; 499 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 500 501 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 502 in6p->in6p_cksum != -1) { 503 struct mbuf *n; 504 int off; 505 u_int16_t *p; 506 507 /* Compute checksum. */ 508 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 509 off = offsetof(struct icmp6_hdr, icmp6_cksum); 510 else 511 off = in6p->in6p_cksum; 512 if (plen < off + 1) { 513 error = EINVAL; 514 goto bad; 515 } 516 off += sizeof(struct ip6_hdr); 517 518 n = m; 519 while (n && n->m_len <= off) { 520 off -= n->m_len; 521 n = n->m_next; 522 } 523 if (!n) 524 goto bad; 525 p = (u_int16_t *)(mtod(n, caddr_t) + off); 526 *p = 0; 527 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 528 } 529 530 /* 531 * Send RA/RS messages to user land for protection, before sending 532 * them to rtadvd/rtsol. 533 */ 534 if ((send_sendso_input_hook != NULL) && 535 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 536 switch (type) { 537 case ND_ROUTER_ADVERT: 538 case ND_ROUTER_SOLICIT: 539 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 540 sizeof(unsigned short), M_NOWAIT); 541 if (mtag == NULL) 542 goto bad; 543 m_tag_prepend(m, mtag); 544 } 545 } 546 547 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 548 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 549 if (oifp) 550 icmp6_ifoutstat_inc(oifp, type, code); 551 ICMP6STAT_INC(icp6s_outhist[type]); 552 } else 553 RIP6STAT_INC(rip6s_opackets); 554 555 goto freectl; 556 557 bad: 558 if (m) 559 m_freem(m); 560 561 freectl: 562 if (control != NULL) { 563 ip6_clearpktopts(&opt, -1); 564 m_freem(control); 565 } 566 INP_WUNLOCK(in6p); 567 return (error); 568 } 569 570 /* 571 * Raw IPv6 socket option processing. 572 */ 573 int 574 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 575 { 576 struct inpcb *inp; 577 int error; 578 579 if (sopt->sopt_level == IPPROTO_ICMPV6) 580 /* 581 * XXX: is it better to call icmp6_ctloutput() directly 582 * from protosw? 583 */ 584 return (icmp6_ctloutput(so, sopt)); 585 else if (sopt->sopt_level != IPPROTO_IPV6) { 586 if (sopt->sopt_level == SOL_SOCKET && 587 sopt->sopt_name == SO_SETFIB) { 588 inp = sotoinpcb(so); 589 INP_WLOCK(inp); 590 inp->inp_inc.inc_fibnum = so->so_fibnum; 591 INP_WUNLOCK(inp); 592 return (0); 593 } 594 return (EINVAL); 595 } 596 597 error = 0; 598 599 switch (sopt->sopt_dir) { 600 case SOPT_GET: 601 switch (sopt->sopt_name) { 602 case MRT6_INIT: 603 case MRT6_DONE: 604 case MRT6_ADD_MIF: 605 case MRT6_DEL_MIF: 606 case MRT6_ADD_MFC: 607 case MRT6_DEL_MFC: 608 case MRT6_PIM: 609 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 610 EOPNOTSUPP; 611 break; 612 case IPV6_CHECKSUM: 613 error = ip6_raw_ctloutput(so, sopt); 614 break; 615 default: 616 error = ip6_ctloutput(so, sopt); 617 break; 618 } 619 break; 620 621 case SOPT_SET: 622 switch (sopt->sopt_name) { 623 case MRT6_INIT: 624 case MRT6_DONE: 625 case MRT6_ADD_MIF: 626 case MRT6_DEL_MIF: 627 case MRT6_ADD_MFC: 628 case MRT6_DEL_MFC: 629 case MRT6_PIM: 630 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 631 EOPNOTSUPP; 632 break; 633 case IPV6_CHECKSUM: 634 error = ip6_raw_ctloutput(so, sopt); 635 break; 636 default: 637 error = ip6_ctloutput(so, sopt); 638 break; 639 } 640 break; 641 } 642 643 return (error); 644 } 645 646 static int 647 rip6_attach(struct socket *so, int proto, struct thread *td) 648 { 649 struct inpcb *inp; 650 struct icmp6_filter *filter; 651 int error; 652 653 inp = sotoinpcb(so); 654 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 655 656 error = priv_check(td, PRIV_NETINET_RAW); 657 if (error) 658 return (error); 659 error = soreserve(so, rip_sendspace, rip_recvspace); 660 if (error) 661 return (error); 662 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 663 if (filter == NULL) 664 return (ENOMEM); 665 INP_INFO_WLOCK(&V_ripcbinfo); 666 error = in_pcballoc(so, &V_ripcbinfo); 667 if (error) { 668 INP_INFO_WUNLOCK(&V_ripcbinfo); 669 free(filter, M_PCB); 670 return (error); 671 } 672 inp = (struct inpcb *)so->so_pcb; 673 INP_INFO_WUNLOCK(&V_ripcbinfo); 674 inp->inp_vflag |= INP_IPV6; 675 inp->inp_ip_p = (long)proto; 676 inp->in6p_hops = -1; /* use kernel default */ 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_INFO_WLOCK(&V_ripcbinfo); 696 INP_WLOCK(inp); 697 free(inp->in6p_icmp6filt, M_PCB); 698 in_pcbdetach(inp); 699 in_pcbfree(inp); 700 INP_INFO_WUNLOCK(&V_ripcbinfo); 701 } 702 703 /* XXXRW: This can't ever be called. */ 704 static void 705 rip6_abort(struct socket *so) 706 { 707 struct inpcb *inp; 708 709 inp = sotoinpcb(so); 710 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 711 712 soisdisconnected(so); 713 } 714 715 static void 716 rip6_close(struct socket *so) 717 { 718 struct inpcb *inp; 719 720 inp = sotoinpcb(so); 721 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 722 723 soisdisconnected(so); 724 } 725 726 static int 727 rip6_disconnect(struct socket *so) 728 { 729 struct inpcb *inp; 730 731 inp = sotoinpcb(so); 732 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 733 734 if ((so->so_state & SS_ISCONNECTED) == 0) 735 return (ENOTCONN); 736 inp->in6p_faddr = in6addr_any; 737 rip6_abort(so); 738 return (0); 739 } 740 741 static int 742 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 743 { 744 struct inpcb *inp; 745 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 746 struct ifaddr *ifa = NULL; 747 int error = 0; 748 749 inp = sotoinpcb(so); 750 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 751 752 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 (TAILQ_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 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 762 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 763 return (EADDRNOTAVAIL); 764 if (ifa != NULL && 765 ((struct in6_ifaddr *)ifa)->ia6_flags & 766 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 767 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 768 ifa_free(ifa); 769 return (EADDRNOTAVAIL); 770 } 771 if (ifa != NULL) 772 ifa_free(ifa); 773 INP_INFO_WLOCK(&V_ripcbinfo); 774 INP_WLOCK(inp); 775 inp->in6p_laddr = addr->sin6_addr; 776 INP_WUNLOCK(inp); 777 INP_INFO_WUNLOCK(&V_ripcbinfo); 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 ifnet *ifp = NULL; 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 (TAILQ_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_INFO_WLOCK(&V_ripcbinfo); 814 INP_WLOCK(inp); 815 /* Source address selection. XXX: need pcblookup? */ 816 error = in6_selectsrc(addr, inp->in6p_outputopts, 817 inp, NULL, so->so_cred, &ifp, &in6a); 818 if (error) { 819 INP_WUNLOCK(inp); 820 INP_INFO_WUNLOCK(&V_ripcbinfo); 821 return (error); 822 } 823 824 /* XXX: see above */ 825 if (ifp && scope_ambiguous && 826 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 827 INP_WUNLOCK(inp); 828 INP_INFO_WUNLOCK(&V_ripcbinfo); 829 return (error); 830 } 831 inp->in6p_faddr = addr->sin6_addr; 832 inp->in6p_laddr = in6a; 833 soisconnected(so); 834 INP_WUNLOCK(inp); 835 INP_INFO_WUNLOCK(&V_ripcbinfo); 836 return (0); 837 } 838 839 static int 840 rip6_shutdown(struct socket *so) 841 { 842 struct inpcb *inp; 843 844 inp = sotoinpcb(so); 845 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 846 847 INP_WLOCK(inp); 848 socantsendmore(so); 849 INP_WUNLOCK(inp); 850 return (0); 851 } 852 853 static int 854 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 855 struct mbuf *control, struct thread *td) 856 { 857 struct inpcb *inp; 858 struct sockaddr_in6 tmp; 859 struct sockaddr_in6 *dst; 860 int ret; 861 862 inp = sotoinpcb(so); 863 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 864 865 /* Always copy sockaddr to avoid overwrites. */ 866 /* Unlocked read. */ 867 if (so->so_state & SS_ISCONNECTED) { 868 if (nam) { 869 m_freem(m); 870 return (EISCONN); 871 } 872 /* XXX */ 873 bzero(&tmp, sizeof(tmp)); 874 tmp.sin6_family = AF_INET6; 875 tmp.sin6_len = sizeof(struct sockaddr_in6); 876 INP_RLOCK(inp); 877 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 878 sizeof(struct in6_addr)); 879 INP_RUNLOCK(inp); 880 dst = &tmp; 881 } else { 882 if (nam == NULL) { 883 m_freem(m); 884 return (ENOTCONN); 885 } 886 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 887 m_freem(m); 888 return (EINVAL); 889 } 890 tmp = *(struct sockaddr_in6 *)nam; 891 dst = &tmp; 892 893 if (dst->sin6_family == AF_UNSPEC) { 894 /* 895 * XXX: we allow this case for backward 896 * compatibility to buggy applications that 897 * rely on old (and wrong) kernel behavior. 898 */ 899 log(LOG_INFO, "rip6 SEND: address family is " 900 "unspec. Assume AF_INET6\n"); 901 dst->sin6_family = AF_INET6; 902 } else if (dst->sin6_family != AF_INET6) { 903 m_freem(m); 904 return(EAFNOSUPPORT); 905 } 906 } 907 ret = rip6_output(m, so, dst, control); 908 return (ret); 909 } 910 911 struct pr_usrreqs rip6_usrreqs = { 912 .pru_abort = rip6_abort, 913 .pru_attach = rip6_attach, 914 .pru_bind = rip6_bind, 915 .pru_connect = rip6_connect, 916 .pru_control = in6_control, 917 .pru_detach = rip6_detach, 918 .pru_disconnect = rip6_disconnect, 919 .pru_peeraddr = in6_getpeeraddr, 920 .pru_send = rip6_send, 921 .pru_shutdown = rip6_shutdown, 922 .pru_sockaddr = in6_getsockaddr, 923 .pru_close = rip6_close, 924 }; 925