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sys/netinet6/raw_ip6.c
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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: releng/9.0/sys/netinet6/raw_ip6.c 211530 2010-08-20 17:52:49Z ume $"); 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/lock.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/priv.h> 75 #include <sys/proc.h> 76 #include <sys/protosw.h> 77 #include <sys/signalvar.h> 78 #include <sys/socket.h> 79 #include <sys/socketvar.h> 80 #include <sys/sx.h> 81 #include <sys/syslog.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 #include <net/vnet.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/in_systm.h> 91 #include <netinet/in_pcb.h> 92 93 #include <netinet/icmp6.h> 94 #include <netinet/ip6.h> 95 #include <netinet/ip_var.h> 96 #include <netinet6/ip6protosw.h> 97 #include <netinet6/ip6_mroute.h> 98 #include <netinet6/in6_pcb.h> 99 #include <netinet6/ip6_var.h> 100 #include <netinet6/nd6.h> 101 #include <netinet6/raw_ip6.h> 102 #include <netinet6/scope6_var.h> 103 #include <netinet6/send.h> 104 105 #ifdef IPSEC 106 #include <netipsec/ipsec.h> 107 #include <netipsec/ipsec6.h> 108 #endif /* IPSEC */ 109 110 #include <machine/stdarg.h> 111 112 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 114 115 /* 116 * Raw interface to IP6 protocol. 117 */ 118 119 VNET_DECLARE(struct inpcbhead, ripcb); 120 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 121 #define V_ripcb VNET(ripcb) 122 #define V_ripcbinfo VNET(ripcbinfo) 123 124 extern u_long rip_sendspace; 125 extern u_long rip_recvspace; 126 127 VNET_DEFINE(struct rip6stat, rip6stat); 128 129 /* 130 * Hooks for multicast routing. They all default to NULL, so leave them not 131 * initialized and rely on BSS being set to 0. 132 */ 133 134 /* 135 * The socket used to communicate with the multicast routing daemon. 136 */ 137 VNET_DEFINE(struct socket *, ip6_mrouter); 138 139 /* 140 * The various mrouter functions. 141 */ 142 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 143 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 144 int (*ip6_mrouter_done)(void); 145 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 146 int (*mrt6_ioctl)(u_long, caddr_t); 147 148 /* 149 * Setup generic address and protocol structures for raw_input routine, then 150 * pass them along with mbuf chain. 151 */ 152 int 153 rip6_input(struct mbuf **mp, int *offp, int proto) 154 { 155 struct ifnet *ifp; 156 struct mbuf *m = *mp; 157 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 158 register struct inpcb *in6p; 159 struct inpcb *last = 0; 160 struct mbuf *opts = NULL; 161 struct sockaddr_in6 fromsa; 162 163 V_rip6stat.rip6s_ipackets++; 164 165 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 166 /* XXX Send icmp6 host/port unreach? */ 167 m_freem(m); 168 return (IPPROTO_DONE); 169 } 170 171 init_sin6(&fromsa, m); /* general init */ 172 173 ifp = m->m_pkthdr.rcvif; 174 175 INP_INFO_RLOCK(&V_ripcbinfo); 176 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 177 /* XXX inp locking */ 178 if ((in6p->inp_vflag & INP_IPV6) == 0) 179 continue; 180 if (in6p->inp_ip_p && 181 in6p->inp_ip_p != proto) 182 continue; 183 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 184 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 185 continue; 186 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 187 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 188 continue; 189 if (jailed_without_vnet(in6p->inp_cred)) { 190 /* 191 * Allow raw socket in jail to receive multicast; 192 * assume process had PRIV_NETINET_RAW at attach, 193 * and fall through into normal filter path if so. 194 */ 195 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 196 prison_check_ip6(in6p->inp_cred, 197 &ip6->ip6_dst) != 0) 198 continue; 199 } 200 if (in6p->in6p_cksum != -1) { 201 V_rip6stat.rip6s_isum++; 202 if (in6_cksum(m, proto, *offp, 203 m->m_pkthdr.len - *offp)) { 204 INP_RUNLOCK(in6p); 205 V_rip6stat.rip6s_badsum++; 206 continue; 207 } 208 } 209 INP_RLOCK(in6p); 210 /* 211 * If this raw socket has multicast state, and we 212 * have received a multicast, check if this socket 213 * should receive it, as multicast filtering is now 214 * the responsibility of the transport layer. 215 */ 216 if (in6p->in6p_moptions && 217 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 218 /* 219 * If the incoming datagram is for MLD, allow it 220 * through unconditionally to the raw socket. 221 * 222 * Use the M_RTALERT_MLD flag to check for MLD 223 * traffic without having to inspect the mbuf chain 224 * more deeply, as all MLDv1/v2 host messages MUST 225 * contain the Router Alert option. 226 * 227 * In the case of MLDv1, we may not have explicitly 228 * joined the group, and may have set IFF_ALLMULTI 229 * on the interface. im6o_mc_filter() may discard 230 * control traffic we actually need to see. 231 * 232 * Userland multicast routing daemons should continue 233 * filter the control traffic appropriately. 234 */ 235 int blocked; 236 237 blocked = MCAST_PASS; 238 if ((m->m_flags & M_RTALERT_MLD) == 0) { 239 struct sockaddr_in6 mcaddr; 240 241 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 242 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 243 mcaddr.sin6_family = AF_INET6; 244 mcaddr.sin6_addr = ip6->ip6_dst; 245 246 blocked = im6o_mc_filter(in6p->in6p_moptions, 247 ifp, 248 (struct sockaddr *)&mcaddr, 249 (struct sockaddr *)&fromsa); 250 } 251 if (blocked != MCAST_PASS) { 252 IP6STAT_INC(ip6s_notmember); 253 INP_RUNLOCK(in6p); 254 continue; 255 } 256 } 257 if (last != NULL) { 258 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 259 260 #ifdef IPSEC 261 /* 262 * Check AH/ESP integrity. 263 */ 264 if (n && ipsec6_in_reject(n, last)) { 265 m_freem(n); 266 V_ipsec6stat.in_polvio++; 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 V_rip6stat.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 V_ipsec6stat.in_polvio++; 299 V_ip6stat.ip6s_delivered--; 300 /* Do not inject data into pcb. */ 301 INP_RUNLOCK(last); 302 } else 303 #endif /* IPSEC */ 304 if (last != NULL) { 305 if (last->inp_flags & INP_CONTROLOPTS || 306 last->inp_socket->so_options & SO_TIMESTAMP) 307 ip6_savecontrol(last, m, &opts); 308 /* Strip intermediate headers. */ 309 m_adj(m, *offp); 310 if (sbappendaddr(&last->inp_socket->so_rcv, 311 (struct sockaddr *)&fromsa, m, opts) == 0) { 312 m_freem(m); 313 if (opts) 314 m_freem(opts); 315 V_rip6stat.rip6s_fullsock++; 316 } else 317 sorwakeup(last->inp_socket); 318 INP_RUNLOCK(last); 319 } else { 320 V_rip6stat.rip6s_nosock++; 321 if (m->m_flags & M_MCAST) 322 V_rip6stat.rip6s_nosockmcast++; 323 if (proto == IPPROTO_NONE) 324 m_freem(m); 325 else { 326 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 327 icmp6_error(m, ICMP6_PARAM_PROB, 328 ICMP6_PARAMPROB_NEXTHEADER, 329 prvnxtp - mtod(m, char *)); 330 } 331 V_ip6stat.ip6s_delivered--; 332 } 333 return (IPPROTO_DONE); 334 } 335 336 void 337 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 338 { 339 struct ip6_hdr *ip6; 340 struct mbuf *m; 341 int off = 0; 342 struct ip6ctlparam *ip6cp = NULL; 343 const struct sockaddr_in6 *sa6_src = NULL; 344 void *cmdarg; 345 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 346 347 if (sa->sa_family != AF_INET6 || 348 sa->sa_len != sizeof(struct sockaddr_in6)) 349 return; 350 351 if ((unsigned)cmd >= PRC_NCMDS) 352 return; 353 if (PRC_IS_REDIRECT(cmd)) 354 notify = in6_rtchange, d = NULL; 355 else if (cmd == PRC_HOSTDEAD) 356 d = NULL; 357 else if (inet6ctlerrmap[cmd] == 0) 358 return; 359 360 /* 361 * If the parameter is from icmp6, decode it. 362 */ 363 if (d != NULL) { 364 ip6cp = (struct ip6ctlparam *)d; 365 m = ip6cp->ip6c_m; 366 ip6 = ip6cp->ip6c_ip6; 367 off = ip6cp->ip6c_off; 368 cmdarg = ip6cp->ip6c_cmdarg; 369 sa6_src = ip6cp->ip6c_src; 370 } else { 371 m = NULL; 372 ip6 = NULL; 373 cmdarg = NULL; 374 sa6_src = &sa6_any; 375 } 376 377 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 378 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 379 } 380 381 /* 382 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 383 * may have setup with control call. 384 */ 385 int 386 #if __STDC__ 387 rip6_output(struct mbuf *m, ...) 388 #else 389 rip6_output(m, va_alist) 390 struct mbuf *m; 391 va_dcl 392 #endif 393 { 394 struct mbuf *control; 395 struct m_tag *mtag; 396 struct socket *so; 397 struct sockaddr_in6 *dstsock; 398 struct in6_addr *dst; 399 struct ip6_hdr *ip6; 400 struct inpcb *in6p; 401 u_int plen = m->m_pkthdr.len; 402 int error = 0; 403 struct ip6_pktopts opt, *optp; 404 struct ifnet *oifp = NULL; 405 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 406 int scope_ambiguous = 0; 407 int use_defzone = 0; 408 struct in6_addr in6a; 409 va_list ap; 410 411 va_start(ap, m); 412 so = va_arg(ap, struct socket *); 413 dstsock = va_arg(ap, struct sockaddr_in6 *); 414 control = va_arg(ap, struct mbuf *); 415 va_end(ap); 416 417 in6p = sotoinpcb(so); 418 INP_WLOCK(in6p); 419 420 dst = &dstsock->sin6_addr; 421 if (control != NULL) { 422 if ((error = ip6_setpktopts(control, &opt, 423 in6p->in6p_outputopts, so->so_cred, 424 so->so_proto->pr_protocol)) != 0) { 425 goto bad; 426 } 427 optp = &opt; 428 } else 429 optp = in6p->in6p_outputopts; 430 431 /* 432 * Check and convert scope zone ID into internal form. 433 * 434 * XXX: we may still need to determine the zone later. 435 */ 436 if (!(so->so_state & SS_ISCONNECTED)) { 437 if (!optp || !optp->ip6po_pktinfo || 438 !optp->ip6po_pktinfo->ipi6_ifindex) 439 use_defzone = V_ip6_use_defzone; 440 if (dstsock->sin6_scope_id == 0 && !use_defzone) 441 scope_ambiguous = 1; 442 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 443 goto bad; 444 } 445 446 /* 447 * For an ICMPv6 packet, we should know its type and code to update 448 * statistics. 449 */ 450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 451 struct icmp6_hdr *icmp6; 452 if (m->m_len < sizeof(struct icmp6_hdr) && 453 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 454 error = ENOBUFS; 455 goto bad; 456 } 457 icmp6 = mtod(m, struct icmp6_hdr *); 458 type = icmp6->icmp6_type; 459 code = icmp6->icmp6_code; 460 } 461 462 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 463 if (m == NULL) { 464 error = ENOBUFS; 465 goto bad; 466 } 467 ip6 = mtod(m, struct ip6_hdr *); 468 469 /* 470 * Source address selection. 471 */ 472 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 473 &oifp, &in6a); 474 if (error) 475 goto bad; 476 error = prison_check_ip6(in6p->inp_cred, &in6a); 477 if (error != 0) 478 goto bad; 479 ip6->ip6_src = in6a; 480 481 if (oifp && scope_ambiguous) { 482 /* 483 * Application should provide a proper zone ID or the use of 484 * default zone IDs should be enabled. Unfortunately, some 485 * applications do not behave as it should, so we need a 486 * workaround. Even if an appropriate ID is not determined 487 * (when it's required), if we can determine the outgoing 488 * interface. determine the zone ID based on the interface. 489 */ 490 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 491 if (error != 0) 492 goto bad; 493 } 494 ip6->ip6_dst = dstsock->sin6_addr; 495 496 /* 497 * Fill in the rest of the IPv6 header fields. 498 */ 499 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 500 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 501 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 502 (IPV6_VERSION & IPV6_VERSION_MASK); 503 504 /* 505 * ip6_plen will be filled in ip6_output, so not fill it here. 506 */ 507 ip6->ip6_nxt = in6p->inp_ip_p; 508 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 509 510 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 511 in6p->in6p_cksum != -1) { 512 struct mbuf *n; 513 int off; 514 u_int16_t *p; 515 516 /* Compute checksum. */ 517 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 518 off = offsetof(struct icmp6_hdr, icmp6_cksum); 519 else 520 off = in6p->in6p_cksum; 521 if (plen < off + 1) { 522 error = EINVAL; 523 goto bad; 524 } 525 off += sizeof(struct ip6_hdr); 526 527 n = m; 528 while (n && n->m_len <= off) { 529 off -= n->m_len; 530 n = n->m_next; 531 } 532 if (!n) 533 goto bad; 534 p = (u_int16_t *)(mtod(n, caddr_t) + off); 535 *p = 0; 536 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 537 } 538 539 /* 540 * Send RA/RS messages to user land for protection, before sending 541 * them to rtadvd/rtsol. 542 */ 543 if ((send_sendso_input_hook != NULL) && 544 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 545 switch (type) { 546 case ND_ROUTER_ADVERT: 547 case ND_ROUTER_SOLICIT: 548 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 549 sizeof(unsigned short), M_NOWAIT); 550 if (mtag == NULL) 551 goto bad; 552 m_tag_prepend(m, mtag); 553 } 554 } 555 556 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 557 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 558 if (oifp) 559 icmp6_ifoutstat_inc(oifp, type, code); 560 ICMP6STAT_INC(icp6s_outhist[type]); 561 } else 562 V_rip6stat.rip6s_opackets++; 563 564 goto freectl; 565 566 bad: 567 if (m) 568 m_freem(m); 569 570 freectl: 571 if (control != NULL) { 572 ip6_clearpktopts(&opt, -1); 573 m_freem(control); 574 } 575 INP_WUNLOCK(in6p); 576 return (error); 577 } 578 579 /* 580 * Raw IPv6 socket option processing. 581 */ 582 int 583 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 584 { 585 int error; 586 587 if (sopt->sopt_level == IPPROTO_ICMPV6) 588 /* 589 * XXX: is it better to call icmp6_ctloutput() directly 590 * from protosw? 591 */ 592 return (icmp6_ctloutput(so, sopt)); 593 else if (sopt->sopt_level != IPPROTO_IPV6) 594 return (EINVAL); 595 596 error = 0; 597 598 switch (sopt->sopt_dir) { 599 case SOPT_GET: 600 switch (sopt->sopt_name) { 601 case MRT6_INIT: 602 case MRT6_DONE: 603 case MRT6_ADD_MIF: 604 case MRT6_DEL_MIF: 605 case MRT6_ADD_MFC: 606 case MRT6_DEL_MFC: 607 case MRT6_PIM: 608 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 609 EOPNOTSUPP; 610 break; 611 case IPV6_CHECKSUM: 612 error = ip6_raw_ctloutput(so, sopt); 613 break; 614 default: 615 error = ip6_ctloutput(so, sopt); 616 break; 617 } 618 break; 619 620 case SOPT_SET: 621 switch (sopt->sopt_name) { 622 case MRT6_INIT: 623 case MRT6_DONE: 624 case MRT6_ADD_MIF: 625 case MRT6_DEL_MIF: 626 case MRT6_ADD_MFC: 627 case MRT6_DEL_MFC: 628 case MRT6_PIM: 629 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 630 EOPNOTSUPP; 631 break; 632 case IPV6_CHECKSUM: 633 error = ip6_raw_ctloutput(so, sopt); 634 break; 635 default: 636 error = ip6_ctloutput(so, sopt); 637 break; 638 } 639 break; 640 } 641 642 return (error); 643 } 644 645 static int 646 rip6_attach(struct socket *so, int proto, struct thread *td) 647 { 648 struct inpcb *inp; 649 struct icmp6_filter *filter; 650 int error; 651 652 inp = sotoinpcb(so); 653 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 654 655 error = priv_check(td, PRIV_NETINET_RAW); 656 if (error) 657 return (error); 658 error = soreserve(so, rip_sendspace, rip_recvspace); 659 if (error) 660 return (error); 661 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 662 if (filter == NULL) 663 return (ENOMEM); 664 INP_INFO_WLOCK(&V_ripcbinfo); 665 error = in_pcballoc(so, &V_ripcbinfo); 666 if (error) { 667 INP_INFO_WUNLOCK(&V_ripcbinfo); 668 free(filter, M_PCB); 669 return (error); 670 } 671 inp = (struct inpcb *)so->so_pcb; 672 INP_INFO_WUNLOCK(&V_ripcbinfo); 673 inp->inp_vflag |= INP_IPV6; 674 inp->inp_ip_p = (long)proto; 675 inp->in6p_hops = -1; /* use kernel default */ 676 inp->in6p_cksum = -1; 677 inp->in6p_icmp6filt = filter; 678 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 679 INP_WUNLOCK(inp); 680 return (0); 681 } 682 683 static void 684 rip6_detach(struct socket *so) 685 { 686 struct inpcb *inp; 687 688 inp = sotoinpcb(so); 689 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 690 691 if (so == V_ip6_mrouter && ip6_mrouter_done) 692 ip6_mrouter_done(); 693 /* xxx: RSVP */ 694 INP_INFO_WLOCK(&V_ripcbinfo); 695 INP_WLOCK(inp); 696 free(inp->in6p_icmp6filt, M_PCB); 697 in_pcbdetach(inp); 698 in_pcbfree(inp); 699 INP_INFO_WUNLOCK(&V_ripcbinfo); 700 } 701 702 /* XXXRW: This can't ever be called. */ 703 static void 704 rip6_abort(struct socket *so) 705 { 706 struct inpcb *inp; 707 708 inp = sotoinpcb(so); 709 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 710 711 soisdisconnected(so); 712 } 713 714 static void 715 rip6_close(struct socket *so) 716 { 717 struct inpcb *inp; 718 719 inp = sotoinpcb(so); 720 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 721 722 soisdisconnected(so); 723 } 724 725 static int 726 rip6_disconnect(struct socket *so) 727 { 728 struct inpcb *inp; 729 730 inp = sotoinpcb(so); 731 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 732 733 if ((so->so_state & SS_ISCONNECTED) == 0) 734 return (ENOTCONN); 735 inp->in6p_faddr = in6addr_any; 736 rip6_abort(so); 737 return (0); 738 } 739 740 static int 741 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 742 { 743 struct inpcb *inp; 744 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 745 struct ifaddr *ifa = NULL; 746 int error = 0; 747 748 inp = sotoinpcb(so); 749 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 750 751 if (nam->sa_len != sizeof(*addr)) 752 return (EINVAL); 753 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 754 return (error); 755 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 756 return (EADDRNOTAVAIL); 757 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 758 return (error); 759 760 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 761 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 762 return (EADDRNOTAVAIL); 763 if (ifa != NULL && 764 ((struct in6_ifaddr *)ifa)->ia6_flags & 765 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 766 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 767 ifa_free(ifa); 768 return (EADDRNOTAVAIL); 769 } 770 if (ifa != NULL) 771 ifa_free(ifa); 772 INP_INFO_WLOCK(&V_ripcbinfo); 773 INP_WLOCK(inp); 774 inp->in6p_laddr = addr->sin6_addr; 775 INP_WUNLOCK(inp); 776 INP_INFO_WUNLOCK(&V_ripcbinfo); 777 return (0); 778 } 779 780 static int 781 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 782 { 783 struct inpcb *inp; 784 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 785 struct in6_addr in6a; 786 struct ifnet *ifp = NULL; 787 int error = 0, scope_ambiguous = 0; 788 789 inp = sotoinpcb(so); 790 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 791 792 if (nam->sa_len != sizeof(*addr)) 793 return (EINVAL); 794 if (TAILQ_EMPTY(&V_ifnet)) 795 return (EADDRNOTAVAIL); 796 if (addr->sin6_family != AF_INET6) 797 return (EAFNOSUPPORT); 798 799 /* 800 * Application should provide a proper zone ID or the use of default 801 * zone IDs should be enabled. Unfortunately, some applications do 802 * not behave as it should, so we need a workaround. Even if an 803 * appropriate ID is not determined, we'll see if we can determine 804 * the outgoing interface. If we can, determine the zone ID based on 805 * the interface below. 806 */ 807 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 808 scope_ambiguous = 1; 809 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 810 return (error); 811 812 INP_INFO_WLOCK(&V_ripcbinfo); 813 INP_WLOCK(inp); 814 /* Source address selection. XXX: need pcblookup? */ 815 error = in6_selectsrc(addr, inp->in6p_outputopts, 816 inp, NULL, so->so_cred, &ifp, &in6a); 817 if (error) { 818 INP_WUNLOCK(inp); 819 INP_INFO_WUNLOCK(&V_ripcbinfo); 820 return (error); 821 } 822 823 /* XXX: see above */ 824 if (ifp && scope_ambiguous && 825 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 826 INP_WUNLOCK(inp); 827 INP_INFO_WUNLOCK(&V_ripcbinfo); 828 return (error); 829 } 830 inp->in6p_faddr = addr->sin6_addr; 831 inp->in6p_laddr = in6a; 832 soisconnected(so); 833 INP_WUNLOCK(inp); 834 INP_INFO_WUNLOCK(&V_ripcbinfo); 835 return (0); 836 } 837 838 static int 839 rip6_shutdown(struct socket *so) 840 { 841 struct inpcb *inp; 842 843 inp = sotoinpcb(so); 844 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 845 846 INP_WLOCK(inp); 847 socantsendmore(so); 848 INP_WUNLOCK(inp); 849 return (0); 850 } 851 852 static int 853 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 854 struct mbuf *control, struct thread *td) 855 { 856 struct inpcb *inp; 857 struct sockaddr_in6 tmp; 858 struct sockaddr_in6 *dst; 859 int ret; 860 861 inp = sotoinpcb(so); 862 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 863 864 /* Always copy sockaddr to avoid overwrites. */ 865 /* Unlocked read. */ 866 if (so->so_state & SS_ISCONNECTED) { 867 if (nam) { 868 m_freem(m); 869 return (EISCONN); 870 } 871 /* XXX */ 872 bzero(&tmp, sizeof(tmp)); 873 tmp.sin6_family = AF_INET6; 874 tmp.sin6_len = sizeof(struct sockaddr_in6); 875 INP_RLOCK(inp); 876 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 877 sizeof(struct in6_addr)); 878 INP_RUNLOCK(inp); 879 dst = &tmp; 880 } else { 881 if (nam == NULL) { 882 m_freem(m); 883 return (ENOTCONN); 884 } 885 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 886 m_freem(m); 887 return (EINVAL); 888 } 889 tmp = *(struct sockaddr_in6 *)nam; 890 dst = &tmp; 891 892 if (dst->sin6_family == AF_UNSPEC) { 893 /* 894 * XXX: we allow this case for backward 895 * compatibility to buggy applications that 896 * rely on old (and wrong) kernel behavior. 897 */ 898 log(LOG_INFO, "rip6 SEND: address family is " 899 "unspec. Assume AF_INET6\n"); 900 dst->sin6_family = AF_INET6; 901 } else if (dst->sin6_family != AF_INET6) { 902 m_freem(m); 903 return(EAFNOSUPPORT); 904 } 905 } 906 ret = rip6_output(m, so, dst, control); 907 return (ret); 908 } 909 910 struct pr_usrreqs rip6_usrreqs = { 911 .pru_abort = rip6_abort, 912 .pru_attach = rip6_attach, 913 .pru_bind = rip6_bind, 914 .pru_connect = rip6_connect, 915 .pru_control = in6_control, 916 .pru_detach = rip6_detach, 917 .pru_disconnect = rip6_disconnect, 918 .pru_peeraddr = in6_getpeeraddr, 919 .pru_send = rip6_send, 920 .pru_shutdown = rip6_shutdown, 921 .pru_sockaddr = in6_getsockaddr, 922 .pru_close = rip6_close, 923 };
Cache object: dcc63ce0dc86f83ff89818279fae2f34
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