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 IPSEC6STAT_INC(ips_in_polvio); 268 /* Do not inject data into pcb. */ 269 } else 270 #endif /* IPSEC */ 271 if (n) { 272 if (last->inp_flags & INP_CONTROLOPTS || 273 last->inp_socket->so_options & SO_TIMESTAMP) 274 ip6_savecontrol(last, n, &opts); 275 /* strip intermediate headers */ 276 m_adj(n, *offp); 277 if (sbappendaddr(&last->inp_socket->so_rcv, 278 (struct sockaddr *)&fromsa, 279 n, opts) == 0) { 280 m_freem(n); 281 if (opts) 282 m_freem(opts); 283 RIP6STAT_INC(rip6s_fullsock); 284 } else 285 sorwakeup(last->inp_socket); 286 opts = NULL; 287 } 288 INP_RUNLOCK(last); 289 } 290 last = in6p; 291 } 292 INP_INFO_RUNLOCK(&V_ripcbinfo); 293 #ifdef IPSEC 294 /* 295 * Check AH/ESP integrity. 296 */ 297 if ((last != NULL) && ipsec6_in_reject(m, last)) { 298 m_freem(m); 299 IPSEC6STAT_INC(ips_in_polvio); 300 IP6STAT_DEC(ip6s_delivered); 301 /* Do not inject data into pcb. */ 302 INP_RUNLOCK(last); 303 } else 304 #endif /* IPSEC */ 305 if (last != NULL) { 306 if (last->inp_flags & INP_CONTROLOPTS || 307 last->inp_socket->so_options & SO_TIMESTAMP) 308 ip6_savecontrol(last, m, &opts); 309 /* Strip intermediate headers. */ 310 m_adj(m, *offp); 311 if (sbappendaddr(&last->inp_socket->so_rcv, 312 (struct sockaddr *)&fromsa, m, opts) == 0) { 313 m_freem(m); 314 if (opts) 315 m_freem(opts); 316 RIP6STAT_INC(rip6s_fullsock); 317 } else 318 sorwakeup(last->inp_socket); 319 INP_RUNLOCK(last); 320 } else { 321 RIP6STAT_INC(rip6s_nosock); 322 if (m->m_flags & M_MCAST) 323 RIP6STAT_INC(rip6s_nosockmcast); 324 if (proto == IPPROTO_NONE) 325 m_freem(m); 326 else { 327 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 328 icmp6_error(m, ICMP6_PARAM_PROB, 329 ICMP6_PARAMPROB_NEXTHEADER, 330 prvnxtp - mtod(m, char *)); 331 } 332 IP6STAT_DEC(ip6s_delivered); 333 } 334 return (IPPROTO_DONE); 335 } 336 337 void 338 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 339 { 340 struct ip6_hdr *ip6; 341 struct mbuf *m; 342 int off = 0; 343 struct ip6ctlparam *ip6cp = NULL; 344 const struct sockaddr_in6 *sa6_src = NULL; 345 void *cmdarg; 346 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 347 348 if (sa->sa_family != AF_INET6 || 349 sa->sa_len != sizeof(struct sockaddr_in6)) 350 return; 351 352 if ((unsigned)cmd >= PRC_NCMDS) 353 return; 354 if (PRC_IS_REDIRECT(cmd)) 355 notify = in6_rtchange, d = NULL; 356 else if (cmd == PRC_HOSTDEAD) 357 d = NULL; 358 else if (inet6ctlerrmap[cmd] == 0) 359 return; 360 361 /* 362 * If the parameter is from icmp6, decode it. 363 */ 364 if (d != NULL) { 365 ip6cp = (struct ip6ctlparam *)d; 366 m = ip6cp->ip6c_m; 367 ip6 = ip6cp->ip6c_ip6; 368 off = ip6cp->ip6c_off; 369 cmdarg = ip6cp->ip6c_cmdarg; 370 sa6_src = ip6cp->ip6c_src; 371 } else { 372 m = NULL; 373 ip6 = NULL; 374 cmdarg = NULL; 375 sa6_src = &sa6_any; 376 } 377 378 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 379 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 380 } 381 382 /* 383 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 384 * may have setup with control call. 385 */ 386 int 387 rip6_output(struct mbuf *m, struct socket *so, ...) 388 { 389 struct mbuf *control; 390 struct m_tag *mtag; 391 struct sockaddr_in6 *dstsock; 392 struct in6_addr *dst; 393 struct ip6_hdr *ip6; 394 struct inpcb *in6p; 395 u_int plen = m->m_pkthdr.len; 396 int error = 0; 397 struct ip6_pktopts opt, *optp; 398 struct ifnet *oifp = NULL; 399 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 400 int scope_ambiguous = 0; 401 int use_defzone = 0; 402 struct in6_addr in6a; 403 va_list ap; 404 405 va_start(ap, so); 406 dstsock = va_arg(ap, struct sockaddr_in6 *); 407 control = va_arg(ap, struct mbuf *); 408 va_end(ap); 409 410 in6p = sotoinpcb(so); 411 INP_WLOCK(in6p); 412 413 dst = &dstsock->sin6_addr; 414 if (control != NULL) { 415 if ((error = ip6_setpktopts(control, &opt, 416 in6p->in6p_outputopts, so->so_cred, 417 so->so_proto->pr_protocol)) != 0) { 418 goto bad; 419 } 420 optp = &opt; 421 } else 422 optp = in6p->in6p_outputopts; 423 424 /* 425 * Check and convert scope zone ID into internal form. 426 * 427 * XXX: we may still need to determine the zone later. 428 */ 429 if (!(so->so_state & SS_ISCONNECTED)) { 430 if (!optp || !optp->ip6po_pktinfo || 431 !optp->ip6po_pktinfo->ipi6_ifindex) 432 use_defzone = V_ip6_use_defzone; 433 if (dstsock->sin6_scope_id == 0 && !use_defzone) 434 scope_ambiguous = 1; 435 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 436 goto bad; 437 } 438 439 /* 440 * For an ICMPv6 packet, we should know its type and code to update 441 * statistics. 442 */ 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 444 struct icmp6_hdr *icmp6; 445 if (m->m_len < sizeof(struct icmp6_hdr) && 446 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 447 error = ENOBUFS; 448 goto bad; 449 } 450 icmp6 = mtod(m, struct icmp6_hdr *); 451 type = icmp6->icmp6_type; 452 code = icmp6->icmp6_code; 453 } 454 455 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 456 if (m == NULL) { 457 error = ENOBUFS; 458 goto bad; 459 } 460 ip6 = mtod(m, struct ip6_hdr *); 461 462 /* 463 * Source address selection. 464 */ 465 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 466 &oifp, &in6a); 467 if (error) 468 goto bad; 469 error = prison_check_ip6(in6p->inp_cred, &in6a); 470 if (error != 0) 471 goto bad; 472 ip6->ip6_src = in6a; 473 474 if (oifp && scope_ambiguous) { 475 /* 476 * Application should provide a proper zone ID or the use of 477 * default zone IDs should be enabled. Unfortunately, some 478 * applications do not behave as it should, so we need a 479 * workaround. Even if an appropriate ID is not determined 480 * (when it's required), if we can determine the outgoing 481 * interface. determine the zone ID based on the interface. 482 */ 483 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 484 if (error != 0) 485 goto bad; 486 } 487 ip6->ip6_dst = dstsock->sin6_addr; 488 489 /* 490 * Fill in the rest of the IPv6 header fields. 491 */ 492 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 493 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 494 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 495 (IPV6_VERSION & IPV6_VERSION_MASK); 496 497 /* 498 * ip6_plen will be filled in ip6_output, so not fill it here. 499 */ 500 ip6->ip6_nxt = in6p->inp_ip_p; 501 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 502 503 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 504 in6p->in6p_cksum != -1) { 505 struct mbuf *n; 506 int off; 507 u_int16_t *p; 508 509 /* Compute checksum. */ 510 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 511 off = offsetof(struct icmp6_hdr, icmp6_cksum); 512 else 513 off = in6p->in6p_cksum; 514 if (plen < off + 1) { 515 error = EINVAL; 516 goto bad; 517 } 518 off += sizeof(struct ip6_hdr); 519 520 n = m; 521 while (n && n->m_len <= off) { 522 off -= n->m_len; 523 n = n->m_next; 524 } 525 if (!n) 526 goto bad; 527 p = (u_int16_t *)(mtod(n, caddr_t) + off); 528 *p = 0; 529 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 530 } 531 532 /* 533 * Send RA/RS messages to user land for protection, before sending 534 * them to rtadvd/rtsol. 535 */ 536 if ((send_sendso_input_hook != NULL) && 537 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 538 switch (type) { 539 case ND_ROUTER_ADVERT: 540 case ND_ROUTER_SOLICIT: 541 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 542 sizeof(unsigned short), M_NOWAIT); 543 if (mtag == NULL) 544 goto bad; 545 m_tag_prepend(m, mtag); 546 } 547 } 548 549 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 550 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 551 if (oifp) 552 icmp6_ifoutstat_inc(oifp, type, code); 553 ICMP6STAT_INC(icp6s_outhist[type]); 554 } else 555 RIP6STAT_INC(rip6s_opackets); 556 557 goto freectl; 558 559 bad: 560 if (m) 561 m_freem(m); 562 563 freectl: 564 if (control != NULL) { 565 ip6_clearpktopts(&opt, -1); 566 m_freem(control); 567 } 568 INP_WUNLOCK(in6p); 569 return (error); 570 } 571 572 /* 573 * Raw IPv6 socket option processing. 574 */ 575 int 576 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 577 { 578 struct inpcb *inp; 579 int error; 580 581 if (sopt->sopt_level == IPPROTO_ICMPV6) 582 /* 583 * XXX: is it better to call icmp6_ctloutput() directly 584 * from protosw? 585 */ 586 return (icmp6_ctloutput(so, sopt)); 587 else if (sopt->sopt_level != IPPROTO_IPV6) { 588 if (sopt->sopt_level == SOL_SOCKET && 589 sopt->sopt_name == SO_SETFIB) { 590 inp = sotoinpcb(so); 591 INP_WLOCK(inp); 592 inp->inp_inc.inc_fibnum = so->so_fibnum; 593 INP_WUNLOCK(inp); 594 return (0); 595 } 596 return (EINVAL); 597 } 598 599 error = 0; 600 601 switch (sopt->sopt_dir) { 602 case SOPT_GET: 603 switch (sopt->sopt_name) { 604 case MRT6_INIT: 605 case MRT6_DONE: 606 case MRT6_ADD_MIF: 607 case MRT6_DEL_MIF: 608 case MRT6_ADD_MFC: 609 case MRT6_DEL_MFC: 610 case MRT6_PIM: 611 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 612 EOPNOTSUPP; 613 break; 614 case IPV6_CHECKSUM: 615 error = ip6_raw_ctloutput(so, sopt); 616 break; 617 default: 618 error = ip6_ctloutput(so, sopt); 619 break; 620 } 621 break; 622 623 case SOPT_SET: 624 switch (sopt->sopt_name) { 625 case MRT6_INIT: 626 case MRT6_DONE: 627 case MRT6_ADD_MIF: 628 case MRT6_DEL_MIF: 629 case MRT6_ADD_MFC: 630 case MRT6_DEL_MFC: 631 case MRT6_PIM: 632 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 633 EOPNOTSUPP; 634 break; 635 case IPV6_CHECKSUM: 636 error = ip6_raw_ctloutput(so, sopt); 637 break; 638 default: 639 error = ip6_ctloutput(so, sopt); 640 break; 641 } 642 break; 643 } 644 645 return (error); 646 } 647 648 static int 649 rip6_attach(struct socket *so, int proto, struct thread *td) 650 { 651 struct inpcb *inp; 652 struct icmp6_filter *filter; 653 int error; 654 655 inp = sotoinpcb(so); 656 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 657 658 error = priv_check(td, PRIV_NETINET_RAW); 659 if (error) 660 return (error); 661 error = soreserve(so, rip_sendspace, rip_recvspace); 662 if (error) 663 return (error); 664 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 665 if (filter == NULL) 666 return (ENOMEM); 667 INP_INFO_WLOCK(&V_ripcbinfo); 668 error = in_pcballoc(so, &V_ripcbinfo); 669 if (error) { 670 INP_INFO_WUNLOCK(&V_ripcbinfo); 671 free(filter, M_PCB); 672 return (error); 673 } 674 inp = (struct inpcb *)so->so_pcb; 675 INP_INFO_WUNLOCK(&V_ripcbinfo); 676 inp->inp_vflag |= INP_IPV6; 677 inp->inp_ip_p = (long)proto; 678 inp->in6p_hops = -1; /* use kernel default */ 679 inp->in6p_cksum = -1; 680 inp->in6p_icmp6filt = filter; 681 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 682 INP_WUNLOCK(inp); 683 return (0); 684 } 685 686 static void 687 rip6_detach(struct socket *so) 688 { 689 struct inpcb *inp; 690 691 inp = sotoinpcb(so); 692 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 693 694 if (so == V_ip6_mrouter && ip6_mrouter_done) 695 ip6_mrouter_done(); 696 /* xxx: RSVP */ 697 INP_INFO_WLOCK(&V_ripcbinfo); 698 INP_WLOCK(inp); 699 free(inp->in6p_icmp6filt, M_PCB); 700 in_pcbdetach(inp); 701 in_pcbfree(inp); 702 INP_INFO_WUNLOCK(&V_ripcbinfo); 703 } 704 705 /* XXXRW: This can't ever be called. */ 706 static void 707 rip6_abort(struct socket *so) 708 { 709 struct inpcb *inp; 710 711 inp = sotoinpcb(so); 712 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 713 714 soisdisconnected(so); 715 } 716 717 static void 718 rip6_close(struct socket *so) 719 { 720 struct inpcb *inp; 721 722 inp = sotoinpcb(so); 723 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 724 725 soisdisconnected(so); 726 } 727 728 static int 729 rip6_disconnect(struct socket *so) 730 { 731 struct inpcb *inp; 732 733 inp = sotoinpcb(so); 734 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 735 736 if ((so->so_state & SS_ISCONNECTED) == 0) 737 return (ENOTCONN); 738 inp->in6p_faddr = in6addr_any; 739 rip6_abort(so); 740 return (0); 741 } 742 743 static int 744 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 745 { 746 struct inpcb *inp; 747 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 748 struct ifaddr *ifa = NULL; 749 int error = 0; 750 751 inp = sotoinpcb(so); 752 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 753 754 if (nam->sa_len != sizeof(*addr)) 755 return (EINVAL); 756 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 757 return (error); 758 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 759 return (EADDRNOTAVAIL); 760 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 761 return (error); 762 763 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 764 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 765 return (EADDRNOTAVAIL); 766 if (ifa != NULL && 767 ((struct in6_ifaddr *)ifa)->ia6_flags & 768 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 769 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 770 ifa_free(ifa); 771 return (EADDRNOTAVAIL); 772 } 773 if (ifa != NULL) 774 ifa_free(ifa); 775 INP_INFO_WLOCK(&V_ripcbinfo); 776 INP_WLOCK(inp); 777 inp->in6p_laddr = addr->sin6_addr; 778 INP_WUNLOCK(inp); 779 INP_INFO_WUNLOCK(&V_ripcbinfo); 780 return (0); 781 } 782 783 static int 784 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 785 { 786 struct inpcb *inp; 787 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 788 struct in6_addr in6a; 789 struct ifnet *ifp = NULL; 790 int error = 0, scope_ambiguous = 0; 791 792 inp = sotoinpcb(so); 793 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 794 795 if (nam->sa_len != sizeof(*addr)) 796 return (EINVAL); 797 if (TAILQ_EMPTY(&V_ifnet)) 798 return (EADDRNOTAVAIL); 799 if (addr->sin6_family != AF_INET6) 800 return (EAFNOSUPPORT); 801 802 /* 803 * Application should provide a proper zone ID or the use of default 804 * zone IDs should be enabled. Unfortunately, some applications do 805 * not behave as it should, so we need a workaround. Even if an 806 * appropriate ID is not determined, we'll see if we can determine 807 * the outgoing interface. If we can, determine the zone ID based on 808 * the interface below. 809 */ 810 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 811 scope_ambiguous = 1; 812 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 813 return (error); 814 815 INP_INFO_WLOCK(&V_ripcbinfo); 816 INP_WLOCK(inp); 817 /* Source address selection. XXX: need pcblookup? */ 818 error = in6_selectsrc(addr, inp->in6p_outputopts, 819 inp, NULL, so->so_cred, &ifp, &in6a); 820 if (error) { 821 INP_WUNLOCK(inp); 822 INP_INFO_WUNLOCK(&V_ripcbinfo); 823 return (error); 824 } 825 826 /* XXX: see above */ 827 if (ifp && scope_ambiguous && 828 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 829 INP_WUNLOCK(inp); 830 INP_INFO_WUNLOCK(&V_ripcbinfo); 831 return (error); 832 } 833 inp->in6p_faddr = addr->sin6_addr; 834 inp->in6p_laddr = in6a; 835 soisconnected(so); 836 INP_WUNLOCK(inp); 837 INP_INFO_WUNLOCK(&V_ripcbinfo); 838 return (0); 839 } 840 841 static int 842 rip6_shutdown(struct socket *so) 843 { 844 struct inpcb *inp; 845 846 inp = sotoinpcb(so); 847 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 848 849 INP_WLOCK(inp); 850 socantsendmore(so); 851 INP_WUNLOCK(inp); 852 return (0); 853 } 854 855 static int 856 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 857 struct mbuf *control, struct thread *td) 858 { 859 struct inpcb *inp; 860 struct sockaddr_in6 tmp; 861 struct sockaddr_in6 *dst; 862 int ret; 863 864 inp = sotoinpcb(so); 865 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 866 867 /* Always copy sockaddr to avoid overwrites. */ 868 /* Unlocked read. */ 869 if (so->so_state & SS_ISCONNECTED) { 870 if (nam) { 871 m_freem(m); 872 return (EISCONN); 873 } 874 /* XXX */ 875 bzero(&tmp, sizeof(tmp)); 876 tmp.sin6_family = AF_INET6; 877 tmp.sin6_len = sizeof(struct sockaddr_in6); 878 INP_RLOCK(inp); 879 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 880 sizeof(struct in6_addr)); 881 INP_RUNLOCK(inp); 882 dst = &tmp; 883 } else { 884 if (nam == NULL) { 885 m_freem(m); 886 return (ENOTCONN); 887 } 888 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 889 m_freem(m); 890 return (EINVAL); 891 } 892 tmp = *(struct sockaddr_in6 *)nam; 893 dst = &tmp; 894 895 if (dst->sin6_family == AF_UNSPEC) { 896 /* 897 * XXX: we allow this case for backward 898 * compatibility to buggy applications that 899 * rely on old (and wrong) kernel behavior. 900 */ 901 log(LOG_INFO, "rip6 SEND: address family is " 902 "unspec. Assume AF_INET6\n"); 903 dst->sin6_family = AF_INET6; 904 } else if (dst->sin6_family != AF_INET6) { 905 m_freem(m); 906 return(EAFNOSUPPORT); 907 } 908 } 909 ret = rip6_output(m, so, dst, control); 910 return (ret); 911 } 912 913 struct pr_usrreqs rip6_usrreqs = { 914 .pru_abort = rip6_abort, 915 .pru_attach = rip6_attach, 916 .pru_bind = rip6_bind, 917 .pru_connect = rip6_connect, 918 .pru_control = in6_control, 919 .pru_detach = rip6_detach, 920 .pru_disconnect = rip6_disconnect, 921 .pru_peeraddr = in6_getpeeraddr, 922 .pru_send = rip6_send, 923 .pru_shutdown = rip6_shutdown, 924 .pru_sockaddr = in6_getsockaddr, 925 .pru_close = rip6_close, 926 }; 927