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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/8.2/sys/netinet6/raw_ip6.c 212056 2010-08-31 15:52:12Z 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 <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 INP_RUNLOCK(in6p); 252 continue; 253 } 254 } 255 if (last != NULL) { 256 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 257 258 #ifdef IPSEC 259 /* 260 * Check AH/ESP integrity. 261 */ 262 if (n && ipsec6_in_reject(n, last)) { 263 m_freem(n); 264 V_ipsec6stat.in_polvio++; 265 /* Do not inject data into pcb. */ 266 } else 267 #endif /* IPSEC */ 268 if (n) { 269 if (last->inp_flags & INP_CONTROLOPTS || 270 last->inp_socket->so_options & SO_TIMESTAMP) 271 ip6_savecontrol(last, n, &opts); 272 /* strip intermediate headers */ 273 m_adj(n, *offp); 274 if (sbappendaddr(&last->inp_socket->so_rcv, 275 (struct sockaddr *)&fromsa, 276 n, opts) == 0) { 277 m_freem(n); 278 if (opts) 279 m_freem(opts); 280 V_rip6stat.rip6s_fullsock++; 281 } else 282 sorwakeup(last->inp_socket); 283 opts = NULL; 284 } 285 INP_RUNLOCK(last); 286 } 287 last = in6p; 288 } 289 INP_INFO_RUNLOCK(&V_ripcbinfo); 290 #ifdef IPSEC 291 /* 292 * Check AH/ESP integrity. 293 */ 294 if ((last != NULL) && ipsec6_in_reject(m, last)) { 295 m_freem(m); 296 V_ipsec6stat.in_polvio++; 297 V_ip6stat.ip6s_delivered--; 298 /* Do not inject data into pcb. */ 299 INP_RUNLOCK(last); 300 } else 301 #endif /* IPSEC */ 302 if (last != NULL) { 303 if (last->inp_flags & INP_CONTROLOPTS || 304 last->inp_socket->so_options & SO_TIMESTAMP) 305 ip6_savecontrol(last, m, &opts); 306 /* Strip intermediate headers. */ 307 m_adj(m, *offp); 308 if (sbappendaddr(&last->inp_socket->so_rcv, 309 (struct sockaddr *)&fromsa, m, opts) == 0) { 310 m_freem(m); 311 if (opts) 312 m_freem(opts); 313 V_rip6stat.rip6s_fullsock++; 314 } else 315 sorwakeup(last->inp_socket); 316 INP_RUNLOCK(last); 317 } else { 318 V_rip6stat.rip6s_nosock++; 319 if (m->m_flags & M_MCAST) 320 V_rip6stat.rip6s_nosockmcast++; 321 if (proto == IPPROTO_NONE) 322 m_freem(m); 323 else { 324 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 325 icmp6_error(m, ICMP6_PARAM_PROB, 326 ICMP6_PARAMPROB_NEXTHEADER, 327 prvnxtp - mtod(m, char *)); 328 } 329 V_ip6stat.ip6s_delivered--; 330 } 331 return (IPPROTO_DONE); 332 } 333 334 void 335 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 336 { 337 struct ip6_hdr *ip6; 338 struct mbuf *m; 339 int off = 0; 340 struct ip6ctlparam *ip6cp = NULL; 341 const struct sockaddr_in6 *sa6_src = NULL; 342 void *cmdarg; 343 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 344 345 if (sa->sa_family != AF_INET6 || 346 sa->sa_len != sizeof(struct sockaddr_in6)) 347 return; 348 349 if ((unsigned)cmd >= PRC_NCMDS) 350 return; 351 if (PRC_IS_REDIRECT(cmd)) 352 notify = in6_rtchange, d = NULL; 353 else if (cmd == PRC_HOSTDEAD) 354 d = NULL; 355 else if (inet6ctlerrmap[cmd] == 0) 356 return; 357 358 /* 359 * If the parameter is from icmp6, decode it. 360 */ 361 if (d != NULL) { 362 ip6cp = (struct ip6ctlparam *)d; 363 m = ip6cp->ip6c_m; 364 ip6 = ip6cp->ip6c_ip6; 365 off = ip6cp->ip6c_off; 366 cmdarg = ip6cp->ip6c_cmdarg; 367 sa6_src = ip6cp->ip6c_src; 368 } else { 369 m = NULL; 370 ip6 = NULL; 371 cmdarg = NULL; 372 sa6_src = &sa6_any; 373 } 374 375 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 376 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 377 } 378 379 /* 380 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 381 * may have setup with control call. 382 */ 383 int 384 #if __STDC__ 385 rip6_output(struct mbuf *m, ...) 386 #else 387 rip6_output(m, va_alist) 388 struct mbuf *m; 389 va_dcl 390 #endif 391 { 392 struct mbuf *control; 393 struct socket *so; 394 struct sockaddr_in6 *dstsock; 395 struct in6_addr *dst; 396 struct ip6_hdr *ip6; 397 struct inpcb *in6p; 398 u_int plen = m->m_pkthdr.len; 399 int error = 0; 400 struct ip6_pktopts opt, *optp; 401 struct ifnet *oifp = NULL; 402 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 403 int scope_ambiguous = 0; 404 int use_defzone = 0; 405 struct in6_addr in6a; 406 va_list ap; 407 408 va_start(ap, m); 409 so = va_arg(ap, struct socket *); 410 dstsock = va_arg(ap, struct sockaddr_in6 *); 411 control = va_arg(ap, struct mbuf *); 412 va_end(ap); 413 414 in6p = sotoinpcb(so); 415 INP_WLOCK(in6p); 416 417 dst = &dstsock->sin6_addr; 418 if (control != NULL) { 419 if ((error = ip6_setpktopts(control, &opt, 420 in6p->in6p_outputopts, so->so_cred, 421 so->so_proto->pr_protocol)) != 0) { 422 goto bad; 423 } 424 optp = &opt; 425 } else 426 optp = in6p->in6p_outputopts; 427 428 /* 429 * Check and convert scope zone ID into internal form. 430 * 431 * XXX: we may still need to determine the zone later. 432 */ 433 if (!(so->so_state & SS_ISCONNECTED)) { 434 if (!optp || !optp->ip6po_pktinfo || 435 !optp->ip6po_pktinfo->ipi6_ifindex) 436 use_defzone = V_ip6_use_defzone; 437 if (dstsock->sin6_scope_id == 0 && !use_defzone) 438 scope_ambiguous = 1; 439 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 440 goto bad; 441 } 442 443 /* 444 * For an ICMPv6 packet, we should know its type and code to update 445 * statistics. 446 */ 447 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 448 struct icmp6_hdr *icmp6; 449 if (m->m_len < sizeof(struct icmp6_hdr) && 450 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 451 error = ENOBUFS; 452 goto bad; 453 } 454 icmp6 = mtod(m, struct icmp6_hdr *); 455 type = icmp6->icmp6_type; 456 code = icmp6->icmp6_code; 457 } 458 459 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 460 if (m == NULL) { 461 error = ENOBUFS; 462 goto bad; 463 } 464 ip6 = mtod(m, struct ip6_hdr *); 465 466 /* 467 * Source address selection. 468 */ 469 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 470 &oifp, &in6a); 471 if (error) 472 goto bad; 473 error = prison_check_ip6(in6p->inp_cred, &in6a); 474 if (error != 0) 475 goto bad; 476 ip6->ip6_src = in6a; 477 478 if (oifp && scope_ambiguous) { 479 /* 480 * Application should provide a proper zone ID or the use of 481 * default zone IDs should be enabled. Unfortunately, some 482 * applications do not behave as it should, so we need a 483 * workaround. Even if an appropriate ID is not determined 484 * (when it's required), if we can determine the outgoing 485 * interface. determine the zone ID based on the interface. 486 */ 487 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 488 if (error != 0) 489 goto bad; 490 } 491 ip6->ip6_dst = dstsock->sin6_addr; 492 493 /* 494 * Fill in the rest of the IPv6 header fields. 495 */ 496 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 497 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 498 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 499 (IPV6_VERSION & IPV6_VERSION_MASK); 500 501 /* 502 * ip6_plen will be filled in ip6_output, so not fill it here. 503 */ 504 ip6->ip6_nxt = in6p->inp_ip_p; 505 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 506 507 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 508 in6p->in6p_cksum != -1) { 509 struct mbuf *n; 510 int off; 511 u_int16_t *p; 512 513 /* Compute checksum. */ 514 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 515 off = offsetof(struct icmp6_hdr, icmp6_cksum); 516 else 517 off = in6p->in6p_cksum; 518 if (plen < off + 1) { 519 error = EINVAL; 520 goto bad; 521 } 522 off += sizeof(struct ip6_hdr); 523 524 n = m; 525 while (n && n->m_len <= off) { 526 off -= n->m_len; 527 n = n->m_next; 528 } 529 if (!n) 530 goto bad; 531 p = (u_int16_t *)(mtod(n, caddr_t) + off); 532 *p = 0; 533 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 534 } 535 536 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 537 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 538 if (oifp) 539 icmp6_ifoutstat_inc(oifp, type, code); 540 ICMP6STAT_INC(icp6s_outhist[type]); 541 } else 542 V_rip6stat.rip6s_opackets++; 543 544 goto freectl; 545 546 bad: 547 if (m) 548 m_freem(m); 549 550 freectl: 551 if (control != NULL) { 552 ip6_clearpktopts(&opt, -1); 553 m_freem(control); 554 } 555 INP_WUNLOCK(in6p); 556 return (error); 557 } 558 559 /* 560 * Raw IPv6 socket option processing. 561 */ 562 int 563 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 564 { 565 int error; 566 567 if (sopt->sopt_level == IPPROTO_ICMPV6) 568 /* 569 * XXX: is it better to call icmp6_ctloutput() directly 570 * from protosw? 571 */ 572 return (icmp6_ctloutput(so, sopt)); 573 else if (sopt->sopt_level != IPPROTO_IPV6) 574 return (EINVAL); 575 576 error = 0; 577 578 switch (sopt->sopt_dir) { 579 case SOPT_GET: 580 switch (sopt->sopt_name) { 581 case MRT6_INIT: 582 case MRT6_DONE: 583 case MRT6_ADD_MIF: 584 case MRT6_DEL_MIF: 585 case MRT6_ADD_MFC: 586 case MRT6_DEL_MFC: 587 case MRT6_PIM: 588 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 589 EOPNOTSUPP; 590 break; 591 case IPV6_CHECKSUM: 592 error = ip6_raw_ctloutput(so, sopt); 593 break; 594 default: 595 error = ip6_ctloutput(so, sopt); 596 break; 597 } 598 break; 599 600 case SOPT_SET: 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_set ? ip6_mrouter_set(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 } 621 622 return (error); 623 } 624 625 static int 626 rip6_attach(struct socket *so, int proto, struct thread *td) 627 { 628 struct inpcb *inp; 629 struct icmp6_filter *filter; 630 int error; 631 632 inp = sotoinpcb(so); 633 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 634 635 error = priv_check(td, PRIV_NETINET_RAW); 636 if (error) 637 return (error); 638 error = soreserve(so, rip_sendspace, rip_recvspace); 639 if (error) 640 return (error); 641 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 642 if (filter == NULL) 643 return (ENOMEM); 644 INP_INFO_WLOCK(&V_ripcbinfo); 645 error = in_pcballoc(so, &V_ripcbinfo); 646 if (error) { 647 INP_INFO_WUNLOCK(&V_ripcbinfo); 648 free(filter, M_PCB); 649 return (error); 650 } 651 inp = (struct inpcb *)so->so_pcb; 652 INP_INFO_WUNLOCK(&V_ripcbinfo); 653 inp->inp_vflag |= INP_IPV6; 654 inp->inp_ip_p = (long)proto; 655 inp->in6p_hops = -1; /* use kernel default */ 656 inp->in6p_cksum = -1; 657 inp->in6p_icmp6filt = filter; 658 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 659 INP_WUNLOCK(inp); 660 return (0); 661 } 662 663 static void 664 rip6_detach(struct socket *so) 665 { 666 struct inpcb *inp; 667 668 inp = sotoinpcb(so); 669 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 670 671 if (so == V_ip6_mrouter && ip6_mrouter_done) 672 ip6_mrouter_done(); 673 /* xxx: RSVP */ 674 INP_INFO_WLOCK(&V_ripcbinfo); 675 INP_WLOCK(inp); 676 free(inp->in6p_icmp6filt, M_PCB); 677 in_pcbdetach(inp); 678 in_pcbfree(inp); 679 INP_INFO_WUNLOCK(&V_ripcbinfo); 680 } 681 682 /* XXXRW: This can't ever be called. */ 683 static void 684 rip6_abort(struct socket *so) 685 { 686 struct inpcb *inp; 687 688 inp = sotoinpcb(so); 689 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 690 691 soisdisconnected(so); 692 } 693 694 static void 695 rip6_close(struct socket *so) 696 { 697 struct inpcb *inp; 698 699 inp = sotoinpcb(so); 700 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 701 702 soisdisconnected(so); 703 } 704 705 static int 706 rip6_disconnect(struct socket *so) 707 { 708 struct inpcb *inp; 709 710 inp = sotoinpcb(so); 711 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 712 713 if ((so->so_state & SS_ISCONNECTED) == 0) 714 return (ENOTCONN); 715 inp->in6p_faddr = in6addr_any; 716 rip6_abort(so); 717 return (0); 718 } 719 720 static int 721 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 722 { 723 struct inpcb *inp; 724 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 725 struct ifaddr *ifa = NULL; 726 int error = 0; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 730 731 if (nam->sa_len != sizeof(*addr)) 732 return (EINVAL); 733 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 734 return (error); 735 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 736 return (EADDRNOTAVAIL); 737 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 738 return (error); 739 740 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 741 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 742 return (EADDRNOTAVAIL); 743 if (ifa != NULL && 744 ((struct in6_ifaddr *)ifa)->ia6_flags & 745 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 746 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 747 ifa_free(ifa); 748 return (EADDRNOTAVAIL); 749 } 750 if (ifa != NULL) 751 ifa_free(ifa); 752 INP_INFO_WLOCK(&V_ripcbinfo); 753 INP_WLOCK(inp); 754 inp->in6p_laddr = addr->sin6_addr; 755 INP_WUNLOCK(inp); 756 INP_INFO_WUNLOCK(&V_ripcbinfo); 757 return (0); 758 } 759 760 static int 761 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 762 { 763 struct inpcb *inp; 764 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 765 struct in6_addr in6a; 766 struct ifnet *ifp = NULL; 767 int error = 0, scope_ambiguous = 0; 768 769 inp = sotoinpcb(so); 770 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 771 772 if (nam->sa_len != sizeof(*addr)) 773 return (EINVAL); 774 if (TAILQ_EMPTY(&V_ifnet)) 775 return (EADDRNOTAVAIL); 776 if (addr->sin6_family != AF_INET6) 777 return (EAFNOSUPPORT); 778 779 /* 780 * Application should provide a proper zone ID or the use of default 781 * zone IDs should be enabled. Unfortunately, some applications do 782 * not behave as it should, so we need a workaround. Even if an 783 * appropriate ID is not determined, we'll see if we can determine 784 * the outgoing interface. If we can, determine the zone ID based on 785 * the interface below. 786 */ 787 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 788 scope_ambiguous = 1; 789 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 790 return (error); 791 792 INP_INFO_WLOCK(&V_ripcbinfo); 793 INP_WLOCK(inp); 794 /* Source address selection. XXX: need pcblookup? */ 795 error = in6_selectsrc(addr, inp->in6p_outputopts, 796 inp, NULL, so->so_cred, &ifp, &in6a); 797 if (error) { 798 INP_WUNLOCK(inp); 799 INP_INFO_WUNLOCK(&V_ripcbinfo); 800 return (error); 801 } 802 803 /* XXX: see above */ 804 if (ifp && scope_ambiguous && 805 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 806 INP_WUNLOCK(inp); 807 INP_INFO_WUNLOCK(&V_ripcbinfo); 808 return (error); 809 } 810 inp->in6p_faddr = addr->sin6_addr; 811 inp->in6p_laddr = in6a; 812 soisconnected(so); 813 INP_WUNLOCK(inp); 814 INP_INFO_WUNLOCK(&V_ripcbinfo); 815 return (0); 816 } 817 818 static int 819 rip6_shutdown(struct socket *so) 820 { 821 struct inpcb *inp; 822 823 inp = sotoinpcb(so); 824 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 825 826 INP_WLOCK(inp); 827 socantsendmore(so); 828 INP_WUNLOCK(inp); 829 return (0); 830 } 831 832 static int 833 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 834 struct mbuf *control, struct thread *td) 835 { 836 struct inpcb *inp; 837 struct sockaddr_in6 tmp; 838 struct sockaddr_in6 *dst; 839 int ret; 840 841 inp = sotoinpcb(so); 842 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 843 844 /* Always copy sockaddr to avoid overwrites. */ 845 /* Unlocked read. */ 846 if (so->so_state & SS_ISCONNECTED) { 847 if (nam) { 848 m_freem(m); 849 return (EISCONN); 850 } 851 /* XXX */ 852 bzero(&tmp, sizeof(tmp)); 853 tmp.sin6_family = AF_INET6; 854 tmp.sin6_len = sizeof(struct sockaddr_in6); 855 INP_RLOCK(inp); 856 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 857 sizeof(struct in6_addr)); 858 INP_RUNLOCK(inp); 859 dst = &tmp; 860 } else { 861 if (nam == NULL) { 862 m_freem(m); 863 return (ENOTCONN); 864 } 865 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 866 m_freem(m); 867 return (EINVAL); 868 } 869 tmp = *(struct sockaddr_in6 *)nam; 870 dst = &tmp; 871 872 if (dst->sin6_family == AF_UNSPEC) { 873 /* 874 * XXX: we allow this case for backward 875 * compatibility to buggy applications that 876 * rely on old (and wrong) kernel behavior. 877 */ 878 log(LOG_INFO, "rip6 SEND: address family is " 879 "unspec. Assume AF_INET6\n"); 880 dst->sin6_family = AF_INET6; 881 } else if (dst->sin6_family != AF_INET6) { 882 m_freem(m); 883 return(EAFNOSUPPORT); 884 } 885 } 886 ret = rip6_output(m, so, dst, control); 887 return (ret); 888 } 889 890 struct pr_usrreqs rip6_usrreqs = { 891 .pru_abort = rip6_abort, 892 .pru_attach = rip6_attach, 893 .pru_bind = rip6_bind, 894 .pru_connect = rip6_connect, 895 .pru_control = in6_control, 896 .pru_detach = rip6_detach, 897 .pru_disconnect = rip6_disconnect, 898 .pru_peeraddr = in6_getpeeraddr, 899 .pru_send = rip6_send, 900 .pru_shutdown = rip6_shutdown, 901 .pru_sockaddr = in6_getsockaddr, 902 .pru_close = rip6_close, 903 };
Cache object: be24f0061551a7992afd9a4ddf6117b6
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