raw_ip6.c revision 211501
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: head/sys/netinet6/raw_ip6.c 211501 2010-08-19 11:31:03Z anchie $"); 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 119VNET_DECLARE(struct inpcbhead, ripcb); 120VNET_DECLARE(struct inpcbinfo, ripcbinfo); 121#define V_ripcb VNET(ripcb) 122#define V_ripcbinfo VNET(ripcbinfo) 123 124extern u_long rip_sendspace; 125extern u_long rip_recvspace; 126 127VNET_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 */ 137VNET_DEFINE(struct socket *, ip6_mrouter); 138 139/* 140 * The various mrouter functions. 141 */ 142int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 143int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 144int (*ip6_mrouter_done)(void); 145int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 146int (*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 */ 152int 153rip6_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 336void 337rip6_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 */ 385int 386#if __STDC__ 387rip6_output(struct mbuf *m, ...) 388#else 389rip6_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->ip6po_pktinfo || !optp->ip6po_pktinfo->ipi6_ifindex) 438 use_defzone = V_ip6_use_defzone; 439 if (dstsock->sin6_scope_id == 0 && !use_defzone) 440 scope_ambiguous = 1; 441 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 442 goto bad; 443 } 444 445 /* 446 * For an ICMPv6 packet, we should know its type and code to update 447 * statistics. 448 */ 449 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 450 struct icmp6_hdr *icmp6; 451 if (m->m_len < sizeof(struct icmp6_hdr) && 452 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 453 error = ENOBUFS; 454 goto bad; 455 } 456 icmp6 = mtod(m, struct icmp6_hdr *); 457 type = icmp6->icmp6_type; 458 code = icmp6->icmp6_code; 459 } 460 461 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 462 if (m == NULL) { 463 error = ENOBUFS; 464 goto bad; 465 } 466 ip6 = mtod(m, struct ip6_hdr *); 467 468 /* 469 * Source address selection. 470 */ 471 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 472 &oifp, &in6a); 473 if (error) 474 goto bad; 475 error = prison_check_ip6(in6p->inp_cred, &in6a); 476 if (error != 0) 477 goto bad; 478 ip6->ip6_src = in6a; 479 480 if (oifp && scope_ambiguous) { 481 /* 482 * Application should provide a proper zone ID or the use of 483 * default zone IDs should be enabled. Unfortunately, some 484 * applications do not behave as it should, so we need a 485 * workaround. Even if an appropriate ID is not determined 486 * (when it's required), if we can determine the outgoing 487 * interface. determine the zone ID based on the interface. 488 */ 489 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 490 if (error != 0) 491 goto bad; 492 } 493 ip6->ip6_dst = dstsock->sin6_addr; 494 495 /* 496 * Fill in the rest of the IPv6 header fields. 497 */ 498 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 499 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 500 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 501 (IPV6_VERSION & IPV6_VERSION_MASK); 502 503 /* 504 * ip6_plen will be filled in ip6_output, so not fill it here. 505 */ 506 ip6->ip6_nxt = in6p->inp_ip_p; 507 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 508 509 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 510 in6p->in6p_cksum != -1) { 511 struct mbuf *n; 512 int off; 513 u_int16_t *p; 514 515 /* Compute checksum. */ 516 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 517 off = offsetof(struct icmp6_hdr, icmp6_cksum); 518 else 519 off = in6p->in6p_cksum; 520 if (plen < off + 1) { 521 error = EINVAL; 522 goto bad; 523 } 524 off += sizeof(struct ip6_hdr); 525 526 n = m; 527 while (n && n->m_len <= off) { 528 off -= n->m_len; 529 n = n->m_next; 530 } 531 if (!n) 532 goto bad; 533 p = (u_int16_t *)(mtod(n, caddr_t) + off); 534 *p = 0; 535 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 536 } 537 538 /* 539 * Send RA/RS messages to user land for protection, before sending 540 * them to rtadvd/rtsol. 541 */ 542 if ((send_sendso_input_hook != NULL) && 543 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 544 switch (type) { 545 case ND_ROUTER_ADVERT: 546 case ND_ROUTER_SOLICIT: 547 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 548 sizeof(unsigned short), M_NOWAIT); 549 if (mtag == NULL) 550 goto bad; 551 m_tag_prepend(m, mtag); 552 } 553 } 554 555 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 556 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 557 if (oifp) 558 icmp6_ifoutstat_inc(oifp, type, code); 559 ICMP6STAT_INC(icp6s_outhist[type]); 560 } else 561 V_rip6stat.rip6s_opackets++; 562 563 goto freectl; 564 565 bad: 566 if (m) 567 m_freem(m); 568 569 freectl: 570 if (control != NULL) { 571 ip6_clearpktopts(&opt, -1); 572 m_freem(control); 573 } 574 INP_WUNLOCK(in6p); 575 return (error); 576} 577 578/* 579 * Raw IPv6 socket option processing. 580 */ 581int 582rip6_ctloutput(struct socket *so, struct sockopt *sopt) 583{ 584 int error; 585 586 if (sopt->sopt_level == IPPROTO_ICMPV6) 587 /* 588 * XXX: is it better to call icmp6_ctloutput() directly 589 * from protosw? 590 */ 591 return (icmp6_ctloutput(so, sopt)); 592 else if (sopt->sopt_level != IPPROTO_IPV6) 593 return (EINVAL); 594 595 error = 0; 596 597 switch (sopt->sopt_dir) { 598 case SOPT_GET: 599 switch (sopt->sopt_name) { 600 case MRT6_INIT: 601 case MRT6_DONE: 602 case MRT6_ADD_MIF: 603 case MRT6_DEL_MIF: 604 case MRT6_ADD_MFC: 605 case MRT6_DEL_MFC: 606 case MRT6_PIM: 607 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 608 EOPNOTSUPP; 609 break; 610 case IPV6_CHECKSUM: 611 error = ip6_raw_ctloutput(so, sopt); 612 break; 613 default: 614 error = ip6_ctloutput(so, sopt); 615 break; 616 } 617 break; 618 619 case SOPT_SET: 620 switch (sopt->sopt_name) { 621 case MRT6_INIT: 622 case MRT6_DONE: 623 case MRT6_ADD_MIF: 624 case MRT6_DEL_MIF: 625 case MRT6_ADD_MFC: 626 case MRT6_DEL_MFC: 627 case MRT6_PIM: 628 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 629 EOPNOTSUPP; 630 break; 631 case IPV6_CHECKSUM: 632 error = ip6_raw_ctloutput(so, sopt); 633 break; 634 default: 635 error = ip6_ctloutput(so, sopt); 636 break; 637 } 638 break; 639 } 640 641 return (error); 642} 643 644static int 645rip6_attach(struct socket *so, int proto, struct thread *td) 646{ 647 struct inpcb *inp; 648 struct icmp6_filter *filter; 649 int error; 650 651 inp = sotoinpcb(so); 652 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 653 654 error = priv_check(td, PRIV_NETINET_RAW); 655 if (error) 656 return (error); 657 error = soreserve(so, rip_sendspace, rip_recvspace); 658 if (error) 659 return (error); 660 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 661 if (filter == NULL) 662 return (ENOMEM); 663 INP_INFO_WLOCK(&V_ripcbinfo); 664 error = in_pcballoc(so, &V_ripcbinfo); 665 if (error) { 666 INP_INFO_WUNLOCK(&V_ripcbinfo); 667 free(filter, M_PCB); 668 return (error); 669 } 670 inp = (struct inpcb *)so->so_pcb; 671 INP_INFO_WUNLOCK(&V_ripcbinfo); 672 inp->inp_vflag |= INP_IPV6; 673 inp->inp_ip_p = (long)proto; 674 inp->in6p_hops = -1; /* use kernel default */ 675 inp->in6p_cksum = -1; 676 inp->in6p_icmp6filt = filter; 677 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 678 INP_WUNLOCK(inp); 679 return (0); 680} 681 682static void 683rip6_detach(struct socket *so) 684{ 685 struct inpcb *inp; 686 687 inp = sotoinpcb(so); 688 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 689 690 if (so == V_ip6_mrouter && ip6_mrouter_done) 691 ip6_mrouter_done(); 692 /* xxx: RSVP */ 693 INP_INFO_WLOCK(&V_ripcbinfo); 694 INP_WLOCK(inp); 695 free(inp->in6p_icmp6filt, M_PCB); 696 in_pcbdetach(inp); 697 in_pcbfree(inp); 698 INP_INFO_WUNLOCK(&V_ripcbinfo); 699} 700 701/* XXXRW: This can't ever be called. */ 702static void 703rip6_abort(struct socket *so) 704{ 705 struct inpcb *inp; 706 707 inp = sotoinpcb(so); 708 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 709 710 soisdisconnected(so); 711} 712 713static void 714rip6_close(struct socket *so) 715{ 716 struct inpcb *inp; 717 718 inp = sotoinpcb(so); 719 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 720 721 soisdisconnected(so); 722} 723 724static int 725rip6_disconnect(struct socket *so) 726{ 727 struct inpcb *inp; 728 729 inp = sotoinpcb(so); 730 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 731 732 if ((so->so_state & SS_ISCONNECTED) == 0) 733 return (ENOTCONN); 734 inp->in6p_faddr = in6addr_any; 735 rip6_abort(so); 736 return (0); 737} 738 739static int 740rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 741{ 742 struct inpcb *inp; 743 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 744 struct ifaddr *ifa = NULL; 745 int error = 0; 746 747 inp = sotoinpcb(so); 748 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 749 750 if (nam->sa_len != sizeof(*addr)) 751 return (EINVAL); 752 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 753 return (error); 754 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 755 return (EADDRNOTAVAIL); 756 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 757 return (error); 758 759 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 760 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 761 return (EADDRNOTAVAIL); 762 if (ifa != NULL && 763 ((struct in6_ifaddr *)ifa)->ia6_flags & 764 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 765 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 766 ifa_free(ifa); 767 return (EADDRNOTAVAIL); 768 } 769 if (ifa != NULL) 770 ifa_free(ifa); 771 INP_INFO_WLOCK(&V_ripcbinfo); 772 INP_WLOCK(inp); 773 inp->in6p_laddr = addr->sin6_addr; 774 INP_WUNLOCK(inp); 775 INP_INFO_WUNLOCK(&V_ripcbinfo); 776 return (0); 777} 778 779static int 780rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 781{ 782 struct inpcb *inp; 783 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 784 struct in6_addr in6a; 785 struct ifnet *ifp = NULL; 786 int error = 0, scope_ambiguous = 0; 787 788 inp = sotoinpcb(so); 789 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 790 791 if (nam->sa_len != sizeof(*addr)) 792 return (EINVAL); 793 if (TAILQ_EMPTY(&V_ifnet)) 794 return (EADDRNOTAVAIL); 795 if (addr->sin6_family != AF_INET6) 796 return (EAFNOSUPPORT); 797 798 /* 799 * Application should provide a proper zone ID or the use of default 800 * zone IDs should be enabled. Unfortunately, some applications do 801 * not behave as it should, so we need a workaround. Even if an 802 * appropriate ID is not determined, we'll see if we can determine 803 * the outgoing interface. If we can, determine the zone ID based on 804 * the interface below. 805 */ 806 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 807 scope_ambiguous = 1; 808 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 809 return (error); 810 811 INP_INFO_WLOCK(&V_ripcbinfo); 812 INP_WLOCK(inp); 813 /* Source address selection. XXX: need pcblookup? */ 814 error = in6_selectsrc(addr, inp->in6p_outputopts, 815 inp, NULL, so->so_cred, &ifp, &in6a); 816 if (error) { 817 INP_WUNLOCK(inp); 818 INP_INFO_WUNLOCK(&V_ripcbinfo); 819 return (error); 820 } 821 822 /* XXX: see above */ 823 if (ifp && scope_ambiguous && 824 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 825 INP_WUNLOCK(inp); 826 INP_INFO_WUNLOCK(&V_ripcbinfo); 827 return (error); 828 } 829 inp->in6p_faddr = addr->sin6_addr; 830 inp->in6p_laddr = in6a; 831 soisconnected(so); 832 INP_WUNLOCK(inp); 833 INP_INFO_WUNLOCK(&V_ripcbinfo); 834 return (0); 835} 836 837static int 838rip6_shutdown(struct socket *so) 839{ 840 struct inpcb *inp; 841 842 inp = sotoinpcb(so); 843 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 844 845 INP_WLOCK(inp); 846 socantsendmore(so); 847 INP_WUNLOCK(inp); 848 return (0); 849} 850 851static int 852rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 853 struct mbuf *control, struct thread *td) 854{ 855 struct inpcb *inp; 856 struct sockaddr_in6 tmp; 857 struct sockaddr_in6 *dst; 858 int ret; 859 860 inp = sotoinpcb(so); 861 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 862 863 /* Always copy sockaddr to avoid overwrites. */ 864 /* Unlocked read. */ 865 if (so->so_state & SS_ISCONNECTED) { 866 if (nam) { 867 m_freem(m); 868 return (EISCONN); 869 } 870 /* XXX */ 871 bzero(&tmp, sizeof(tmp)); 872 tmp.sin6_family = AF_INET6; 873 tmp.sin6_len = sizeof(struct sockaddr_in6); 874 INP_RLOCK(inp); 875 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 876 sizeof(struct in6_addr)); 877 INP_RUNLOCK(inp); 878 dst = &tmp; 879 } else { 880 if (nam == NULL) { 881 m_freem(m); 882 return (ENOTCONN); 883 } 884 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 885 m_freem(m); 886 return (EINVAL); 887 } 888 tmp = *(struct sockaddr_in6 *)nam; 889 dst = &tmp; 890 891 if (dst->sin6_family == AF_UNSPEC) { 892 /* 893 * XXX: we allow this case for backward 894 * compatibility to buggy applications that 895 * rely on old (and wrong) kernel behavior. 896 */ 897 log(LOG_INFO, "rip6 SEND: address family is " 898 "unspec. Assume AF_INET6\n"); 899 dst->sin6_family = AF_INET6; 900 } else if (dst->sin6_family != AF_INET6) { 901 m_freem(m); 902 return(EAFNOSUPPORT); 903 } 904 } 905 ret = rip6_output(m, so, dst, control); 906 return (ret); 907} 908 909struct pr_usrreqs rip6_usrreqs = { 910 .pru_abort = rip6_abort, 911 .pru_attach = rip6_attach, 912 .pru_bind = rip6_bind, 913 .pru_connect = rip6_connect, 914 .pru_control = in6_control, 915 .pru_detach = rip6_detach, 916 .pru_disconnect = rip6_disconnect, 917 .pru_peeraddr = in6_getpeeraddr, 918 .pru_send = rip6_send, 919 .pru_shutdown = rip6_shutdown, 920 .pru_sockaddr = in6_getsockaddr, 921 .pru_close = rip6_close, 922}; 923