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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/8.1/sys/netinet6/raw_ip6.c 207695 2010-05-06 06:44:19Z bz $"); 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 <netinet6/ip6protosw.h> 96 #include <netinet6/ip6_mroute.h> 97 #include <netinet6/in6_pcb.h> 98 #include <netinet6/ip6_var.h> 99 #include <netinet6/nd6.h> 100 #include <netinet6/raw_ip6.h> 101 #include <netinet6/scope6_var.h> 102 103 #ifdef IPSEC 104 #include <netipsec/ipsec.h> 105 #include <netipsec/ipsec6.h> 106 #endif /* IPSEC */ 107 108 #include <machine/stdarg.h> 109 110 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 111 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 112 113 /* 114 * Raw interface to IP6 protocol. 115 */ 116 117 VNET_DECLARE(struct inpcbhead, ripcb); 118 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 119 #define V_ripcb VNET(ripcb) 120 #define V_ripcbinfo VNET(ripcbinfo) 121 122 extern u_long rip_sendspace; 123 extern u_long rip_recvspace; 124 125 VNET_DEFINE(struct rip6stat, rip6stat); 126 127 /* 128 * Hooks for multicast routing. They all default to NULL, so leave them not 129 * initialized and rely on BSS being set to 0. 130 */ 131 132 /* 133 * The socket used to communicate with the multicast routing daemon. 134 */ 135 VNET_DEFINE(struct socket *, ip6_mrouter); 136 137 /* 138 * The various mrouter functions. 139 */ 140 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 141 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 142 int (*ip6_mrouter_done)(void); 143 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 144 int (*mrt6_ioctl)(u_long, caddr_t); 145 146 /* 147 * Setup generic address and protocol structures for raw_input routine, then 148 * pass them along with mbuf chain. 149 */ 150 int 151 rip6_input(struct mbuf **mp, int *offp, int proto) 152 { 153 struct ifnet *ifp; 154 struct mbuf *m = *mp; 155 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 156 register struct inpcb *in6p; 157 struct inpcb *last = 0; 158 struct mbuf *opts = NULL; 159 struct sockaddr_in6 fromsa; 160 161 V_rip6stat.rip6s_ipackets++; 162 163 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 164 /* XXX Send icmp6 host/port unreach? */ 165 m_freem(m); 166 return (IPPROTO_DONE); 167 } 168 169 init_sin6(&fromsa, m); /* general init */ 170 171 ifp = m->m_pkthdr.rcvif; 172 173 INP_INFO_RLOCK(&V_ripcbinfo); 174 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 175 /* XXX inp locking */ 176 if ((in6p->inp_vflag & INP_IPV6) == 0) 177 continue; 178 if (in6p->inp_ip_p && 179 in6p->inp_ip_p != proto) 180 continue; 181 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 182 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 183 continue; 184 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 185 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 186 continue; 187 if (jailed_without_vnet(in6p->inp_cred)) { 188 /* 189 * Allow raw socket in jail to receive multicast; 190 * assume process had PRIV_NETINET_RAW at attach, 191 * and fall through into normal filter path if so. 192 */ 193 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 194 prison_check_ip6(in6p->inp_cred, 195 &ip6->ip6_dst) != 0) 196 continue; 197 } 198 if (in6p->in6p_cksum != -1) { 199 V_rip6stat.rip6s_isum++; 200 if (in6_cksum(m, proto, *offp, 201 m->m_pkthdr.len - *offp)) { 202 INP_RUNLOCK(in6p); 203 V_rip6stat.rip6s_badsum++; 204 continue; 205 } 206 } 207 INP_RLOCK(in6p); 208 /* 209 * If this raw socket has multicast state, and we 210 * have received a multicast, check if this socket 211 * should receive it, as multicast filtering is now 212 * the responsibility of the transport layer. 213 */ 214 if (in6p->in6p_moptions && 215 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 216 /* 217 * If the incoming datagram is for MLD, allow it 218 * through unconditionally to the raw socket. 219 * 220 * Use the M_RTALERT_MLD flag to check for MLD 221 * traffic without having to inspect the mbuf chain 222 * more deeply, as all MLDv1/v2 host messages MUST 223 * contain the Router Alert option. 224 * 225 * In the case of MLDv1, we may not have explicitly 226 * joined the group, and may have set IFF_ALLMULTI 227 * on the interface. im6o_mc_filter() may discard 228 * control traffic we actually need to see. 229 * 230 * Userland multicast routing daemons should continue 231 * filter the control traffic appropriately. 232 */ 233 int blocked; 234 235 blocked = MCAST_PASS; 236 if ((m->m_flags & M_RTALERT_MLD) == 0) { 237 struct sockaddr_in6 mcaddr; 238 239 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 240 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 241 mcaddr.sin6_family = AF_INET6; 242 mcaddr.sin6_addr = ip6->ip6_dst; 243 244 blocked = im6o_mc_filter(in6p->in6p_moptions, 245 ifp, 246 (struct sockaddr *)&mcaddr, 247 (struct sockaddr *)&fromsa); 248 } 249 if (blocked != MCAST_PASS) { 250 IP6STAT_INC(ip6s_notmember); 251 continue; 252 } 253 } 254 if (last != NULL) { 255 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 256 257 #ifdef IPSEC 258 /* 259 * Check AH/ESP integrity. 260 */ 261 if (n && ipsec6_in_reject(n, last)) { 262 m_freem(n); 263 V_ipsec6stat.in_polvio++; 264 /* Do not inject data into pcb. */ 265 } else 266 #endif /* IPSEC */ 267 if (n) { 268 if (last->inp_flags & INP_CONTROLOPTS || 269 last->inp_socket->so_options & SO_TIMESTAMP) 270 ip6_savecontrol(last, n, &opts); 271 /* strip intermediate headers */ 272 m_adj(n, *offp); 273 if (sbappendaddr(&last->inp_socket->so_rcv, 274 (struct sockaddr *)&fromsa, 275 n, opts) == 0) { 276 m_freem(n); 277 if (opts) 278 m_freem(opts); 279 V_rip6stat.rip6s_fullsock++; 280 } else 281 sorwakeup(last->inp_socket); 282 opts = NULL; 283 } 284 INP_RUNLOCK(last); 285 } 286 last = in6p; 287 } 288 INP_INFO_RUNLOCK(&V_ripcbinfo); 289 #ifdef IPSEC 290 /* 291 * Check AH/ESP integrity. 292 */ 293 if ((last != NULL) && ipsec6_in_reject(m, last)) { 294 m_freem(m); 295 V_ipsec6stat.in_polvio++; 296 V_ip6stat.ip6s_delivered--; 297 /* Do not inject data into pcb. */ 298 INP_RUNLOCK(last); 299 } else 300 #endif /* IPSEC */ 301 if (last != NULL) { 302 if (last->inp_flags & INP_CONTROLOPTS || 303 last->inp_socket->so_options & SO_TIMESTAMP) 304 ip6_savecontrol(last, m, &opts); 305 /* Strip intermediate headers. */ 306 m_adj(m, *offp); 307 if (sbappendaddr(&last->inp_socket->so_rcv, 308 (struct sockaddr *)&fromsa, m, opts) == 0) { 309 m_freem(m); 310 if (opts) 311 m_freem(opts); 312 V_rip6stat.rip6s_fullsock++; 313 } else 314 sorwakeup(last->inp_socket); 315 INP_RUNLOCK(last); 316 } else { 317 V_rip6stat.rip6s_nosock++; 318 if (m->m_flags & M_MCAST) 319 V_rip6stat.rip6s_nosockmcast++; 320 if (proto == IPPROTO_NONE) 321 m_freem(m); 322 else { 323 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 324 icmp6_error(m, ICMP6_PARAM_PROB, 325 ICMP6_PARAMPROB_NEXTHEADER, 326 prvnxtp - mtod(m, char *)); 327 } 328 V_ip6stat.ip6s_delivered--; 329 } 330 return (IPPROTO_DONE); 331 } 332 333 void 334 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 335 { 336 struct ip6_hdr *ip6; 337 struct mbuf *m; 338 int off = 0; 339 struct ip6ctlparam *ip6cp = NULL; 340 const struct sockaddr_in6 *sa6_src = NULL; 341 void *cmdarg; 342 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 343 344 if (sa->sa_family != AF_INET6 || 345 sa->sa_len != sizeof(struct sockaddr_in6)) 346 return; 347 348 if ((unsigned)cmd >= PRC_NCMDS) 349 return; 350 if (PRC_IS_REDIRECT(cmd)) 351 notify = in6_rtchange, d = NULL; 352 else if (cmd == PRC_HOSTDEAD) 353 d = NULL; 354 else if (inet6ctlerrmap[cmd] == 0) 355 return; 356 357 /* 358 * If the parameter is from icmp6, decode it. 359 */ 360 if (d != NULL) { 361 ip6cp = (struct ip6ctlparam *)d; 362 m = ip6cp->ip6c_m; 363 ip6 = ip6cp->ip6c_ip6; 364 off = ip6cp->ip6c_off; 365 cmdarg = ip6cp->ip6c_cmdarg; 366 sa6_src = ip6cp->ip6c_src; 367 } else { 368 m = NULL; 369 ip6 = NULL; 370 cmdarg = NULL; 371 sa6_src = &sa6_any; 372 } 373 374 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 375 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 376 } 377 378 /* 379 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 380 * may have setup with control call. 381 */ 382 int 383 #if __STDC__ 384 rip6_output(struct mbuf *m, ...) 385 #else 386 rip6_output(m, va_alist) 387 struct mbuf *m; 388 va_dcl 389 #endif 390 { 391 struct mbuf *control; 392 struct socket *so; 393 struct sockaddr_in6 *dstsock; 394 struct in6_addr *dst; 395 struct ip6_hdr *ip6; 396 struct inpcb *in6p; 397 u_int plen = m->m_pkthdr.len; 398 int error = 0; 399 struct ip6_pktopts opt, *optp; 400 struct ifnet *oifp = NULL; 401 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 402 int scope_ambiguous = 0; 403 struct in6_addr in6a; 404 va_list ap; 405 406 va_start(ap, m); 407 so = va_arg(ap, struct socket *); 408 dstsock = va_arg(ap, struct sockaddr_in6 *); 409 control = va_arg(ap, struct mbuf *); 410 va_end(ap); 411 412 in6p = sotoinpcb(so); 413 INP_WLOCK(in6p); 414 415 dst = &dstsock->sin6_addr; 416 if (control != NULL) { 417 if ((error = ip6_setpktopts(control, &opt, 418 in6p->in6p_outputopts, so->so_cred, 419 so->so_proto->pr_protocol)) != 0) { 420 goto bad; 421 } 422 optp = &opt; 423 } else 424 optp = in6p->in6p_outputopts; 425 426 /* 427 * Check and convert scope zone ID into internal form. 428 * 429 * XXX: we may still need to determine the zone later. 430 */ 431 if (!(so->so_state & SS_ISCONNECTED)) { 432 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 433 scope_ambiguous = 1; 434 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 435 goto bad; 436 } 437 438 /* 439 * For an ICMPv6 packet, we should know its type and code to update 440 * statistics. 441 */ 442 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 443 struct icmp6_hdr *icmp6; 444 if (m->m_len < sizeof(struct icmp6_hdr) && 445 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 446 error = ENOBUFS; 447 goto bad; 448 } 449 icmp6 = mtod(m, struct icmp6_hdr *); 450 type = icmp6->icmp6_type; 451 code = icmp6->icmp6_code; 452 } 453 454 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 455 if (m == NULL) { 456 error = ENOBUFS; 457 goto bad; 458 } 459 ip6 = mtod(m, struct ip6_hdr *); 460 461 /* 462 * Source address selection. 463 */ 464 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 465 &oifp, &in6a); 466 if (error) 467 goto bad; 468 error = prison_check_ip6(in6p->inp_cred, &in6a); 469 if (error != 0) 470 goto bad; 471 ip6->ip6_src = in6a; 472 473 if (oifp && scope_ambiguous) { 474 /* 475 * Application should provide a proper zone ID or the use of 476 * default zone IDs should be enabled. Unfortunately, some 477 * applications do not behave as it should, so we need a 478 * workaround. Even if an appropriate ID is not determined 479 * (when it's required), if we can determine the outgoing 480 * interface. determine the zone ID based on the interface. 481 */ 482 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 483 if (error != 0) 484 goto bad; 485 } 486 ip6->ip6_dst = dstsock->sin6_addr; 487 488 /* 489 * Fill in the rest of the IPv6 header fields. 490 */ 491 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 492 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 493 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 494 (IPV6_VERSION & IPV6_VERSION_MASK); 495 496 /* 497 * ip6_plen will be filled in ip6_output, so not fill it here. 498 */ 499 ip6->ip6_nxt = in6p->inp_ip_p; 500 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 501 502 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 503 in6p->in6p_cksum != -1) { 504 struct mbuf *n; 505 int off; 506 u_int16_t *p; 507 508 /* Compute checksum. */ 509 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 510 off = offsetof(struct icmp6_hdr, icmp6_cksum); 511 else 512 off = in6p->in6p_cksum; 513 if (plen < off + 1) { 514 error = EINVAL; 515 goto bad; 516 } 517 off += sizeof(struct ip6_hdr); 518 519 n = m; 520 while (n && n->m_len <= off) { 521 off -= n->m_len; 522 n = n->m_next; 523 } 524 if (!n) 525 goto bad; 526 p = (u_int16_t *)(mtod(n, caddr_t) + off); 527 *p = 0; 528 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 529 } 530 531 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 532 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 533 if (oifp) 534 icmp6_ifoutstat_inc(oifp, type, code); 535 ICMP6STAT_INC(icp6s_outhist[type]); 536 } else 537 V_rip6stat.rip6s_opackets++; 538 539 goto freectl; 540 541 bad: 542 if (m) 543 m_freem(m); 544 545 freectl: 546 if (control != NULL) { 547 ip6_clearpktopts(&opt, -1); 548 m_freem(control); 549 } 550 INP_WUNLOCK(in6p); 551 return (error); 552 } 553 554 /* 555 * Raw IPv6 socket option processing. 556 */ 557 int 558 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 559 { 560 int error; 561 562 if (sopt->sopt_level == IPPROTO_ICMPV6) 563 /* 564 * XXX: is it better to call icmp6_ctloutput() directly 565 * from protosw? 566 */ 567 return (icmp6_ctloutput(so, sopt)); 568 else if (sopt->sopt_level != IPPROTO_IPV6) 569 return (EINVAL); 570 571 error = 0; 572 573 switch (sopt->sopt_dir) { 574 case SOPT_GET: 575 switch (sopt->sopt_name) { 576 case MRT6_INIT: 577 case MRT6_DONE: 578 case MRT6_ADD_MIF: 579 case MRT6_DEL_MIF: 580 case MRT6_ADD_MFC: 581 case MRT6_DEL_MFC: 582 case MRT6_PIM: 583 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 584 EOPNOTSUPP; 585 break; 586 case IPV6_CHECKSUM: 587 error = ip6_raw_ctloutput(so, sopt); 588 break; 589 default: 590 error = ip6_ctloutput(so, sopt); 591 break; 592 } 593 break; 594 595 case SOPT_SET: 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_set ? ip6_mrouter_set(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 } 616 617 return (error); 618 } 619 620 static int 621 rip6_attach(struct socket *so, int proto, struct thread *td) 622 { 623 struct inpcb *inp; 624 struct icmp6_filter *filter; 625 int error; 626 627 inp = sotoinpcb(so); 628 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 629 630 error = priv_check(td, PRIV_NETINET_RAW); 631 if (error) 632 return (error); 633 error = soreserve(so, rip_sendspace, rip_recvspace); 634 if (error) 635 return (error); 636 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 637 if (filter == NULL) 638 return (ENOMEM); 639 INP_INFO_WLOCK(&V_ripcbinfo); 640 error = in_pcballoc(so, &V_ripcbinfo); 641 if (error) { 642 INP_INFO_WUNLOCK(&V_ripcbinfo); 643 free(filter, M_PCB); 644 return (error); 645 } 646 inp = (struct inpcb *)so->so_pcb; 647 INP_INFO_WUNLOCK(&V_ripcbinfo); 648 inp->inp_vflag |= INP_IPV6; 649 inp->inp_ip_p = (long)proto; 650 inp->in6p_hops = -1; /* use kernel default */ 651 inp->in6p_cksum = -1; 652 inp->in6p_icmp6filt = filter; 653 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 654 INP_WUNLOCK(inp); 655 return (0); 656 } 657 658 static void 659 rip6_detach(struct socket *so) 660 { 661 struct inpcb *inp; 662 663 inp = sotoinpcb(so); 664 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 665 666 if (so == V_ip6_mrouter && ip6_mrouter_done) 667 ip6_mrouter_done(); 668 /* xxx: RSVP */ 669 INP_INFO_WLOCK(&V_ripcbinfo); 670 INP_WLOCK(inp); 671 free(inp->in6p_icmp6filt, M_PCB); 672 in_pcbdetach(inp); 673 in_pcbfree(inp); 674 INP_INFO_WUNLOCK(&V_ripcbinfo); 675 } 676 677 /* XXXRW: This can't ever be called. */ 678 static void 679 rip6_abort(struct socket *so) 680 { 681 struct inpcb *inp; 682 683 inp = sotoinpcb(so); 684 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 685 686 soisdisconnected(so); 687 } 688 689 static void 690 rip6_close(struct socket *so) 691 { 692 struct inpcb *inp; 693 694 inp = sotoinpcb(so); 695 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 696 697 soisdisconnected(so); 698 } 699 700 static int 701 rip6_disconnect(struct socket *so) 702 { 703 struct inpcb *inp; 704 705 inp = sotoinpcb(so); 706 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 707 708 if ((so->so_state & SS_ISCONNECTED) == 0) 709 return (ENOTCONN); 710 inp->in6p_faddr = in6addr_any; 711 rip6_abort(so); 712 return (0); 713 } 714 715 static int 716 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 717 { 718 struct inpcb *inp; 719 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 720 struct ifaddr *ifa = NULL; 721 int error = 0; 722 723 inp = sotoinpcb(so); 724 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 725 726 if (nam->sa_len != sizeof(*addr)) 727 return (EINVAL); 728 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 729 return (error); 730 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 731 return (EADDRNOTAVAIL); 732 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 733 return (error); 734 735 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 736 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 737 return (EADDRNOTAVAIL); 738 if (ifa != NULL && 739 ((struct in6_ifaddr *)ifa)->ia6_flags & 740 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 741 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 742 ifa_free(ifa); 743 return (EADDRNOTAVAIL); 744 } 745 if (ifa != NULL) 746 ifa_free(ifa); 747 INP_INFO_WLOCK(&V_ripcbinfo); 748 INP_WLOCK(inp); 749 inp->in6p_laddr = addr->sin6_addr; 750 INP_WUNLOCK(inp); 751 INP_INFO_WUNLOCK(&V_ripcbinfo); 752 return (0); 753 } 754 755 static int 756 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 757 { 758 struct inpcb *inp; 759 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 760 struct in6_addr in6a; 761 struct ifnet *ifp = NULL; 762 int error = 0, scope_ambiguous = 0; 763 764 inp = sotoinpcb(so); 765 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 766 767 if (nam->sa_len != sizeof(*addr)) 768 return (EINVAL); 769 if (TAILQ_EMPTY(&V_ifnet)) 770 return (EADDRNOTAVAIL); 771 if (addr->sin6_family != AF_INET6) 772 return (EAFNOSUPPORT); 773 774 /* 775 * Application should provide a proper zone ID or the use of default 776 * zone IDs should be enabled. Unfortunately, some applications do 777 * not behave as it should, so we need a workaround. Even if an 778 * appropriate ID is not determined, we'll see if we can determine 779 * the outgoing interface. If we can, determine the zone ID based on 780 * the interface below. 781 */ 782 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 783 scope_ambiguous = 1; 784 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 785 return (error); 786 787 INP_INFO_WLOCK(&V_ripcbinfo); 788 INP_WLOCK(inp); 789 /* Source address selection. XXX: need pcblookup? */ 790 error = in6_selectsrc(addr, inp->in6p_outputopts, 791 inp, NULL, so->so_cred, &ifp, &in6a); 792 if (error) { 793 INP_WUNLOCK(inp); 794 INP_INFO_WUNLOCK(&V_ripcbinfo); 795 return (error); 796 } 797 798 /* XXX: see above */ 799 if (ifp && scope_ambiguous && 800 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 801 INP_WUNLOCK(inp); 802 INP_INFO_WUNLOCK(&V_ripcbinfo); 803 return (error); 804 } 805 inp->in6p_faddr = addr->sin6_addr; 806 inp->in6p_laddr = in6a; 807 soisconnected(so); 808 INP_WUNLOCK(inp); 809 INP_INFO_WUNLOCK(&V_ripcbinfo); 810 return (0); 811 } 812 813 static int 814 rip6_shutdown(struct socket *so) 815 { 816 struct inpcb *inp; 817 818 inp = sotoinpcb(so); 819 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 820 821 INP_WLOCK(inp); 822 socantsendmore(so); 823 INP_WUNLOCK(inp); 824 return (0); 825 } 826 827 static int 828 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 829 struct mbuf *control, struct thread *td) 830 { 831 struct inpcb *inp; 832 struct sockaddr_in6 tmp; 833 struct sockaddr_in6 *dst; 834 int ret; 835 836 inp = sotoinpcb(so); 837 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 838 839 /* Always copy sockaddr to avoid overwrites. */ 840 /* Unlocked read. */ 841 if (so->so_state & SS_ISCONNECTED) { 842 if (nam) { 843 m_freem(m); 844 return (EISCONN); 845 } 846 /* XXX */ 847 bzero(&tmp, sizeof(tmp)); 848 tmp.sin6_family = AF_INET6; 849 tmp.sin6_len = sizeof(struct sockaddr_in6); 850 INP_RLOCK(inp); 851 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 852 sizeof(struct in6_addr)); 853 INP_RUNLOCK(inp); 854 dst = &tmp; 855 } else { 856 if (nam == NULL) { 857 m_freem(m); 858 return (ENOTCONN); 859 } 860 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 861 m_freem(m); 862 return (EINVAL); 863 } 864 tmp = *(struct sockaddr_in6 *)nam; 865 dst = &tmp; 866 867 if (dst->sin6_family == AF_UNSPEC) { 868 /* 869 * XXX: we allow this case for backward 870 * compatibility to buggy applications that 871 * rely on old (and wrong) kernel behavior. 872 */ 873 log(LOG_INFO, "rip6 SEND: address family is " 874 "unspec. Assume AF_INET6\n"); 875 dst->sin6_family = AF_INET6; 876 } else if (dst->sin6_family != AF_INET6) { 877 m_freem(m); 878 return(EAFNOSUPPORT); 879 } 880 } 881 ret = rip6_output(m, so, dst, control); 882 return (ret); 883 } 884 885 struct pr_usrreqs rip6_usrreqs = { 886 .pru_abort = rip6_abort, 887 .pru_attach = rip6_attach, 888 .pru_bind = rip6_bind, 889 .pru_connect = rip6_connect, 890 .pru_control = in6_control, 891 .pru_detach = rip6_detach, 892 .pru_disconnect = rip6_disconnect, 893 .pru_peeraddr = in6_getpeeraddr, 894 .pru_send = rip6_send, 895 .pru_shutdown = rip6_shutdown, 896 .pru_sockaddr = in6_getsockaddr, 897 .pru_close = rip6_close, 898 };
Cache object: af27364436fe746f4954b271aa80291e
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