1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /*- 31 * Copyright (c) 1982, 1986, 1988, 1993 32 * The Regents of the University of California. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 60 */ 61 62 #include <sys/cdefs.h> 63 __FBSDID("$FreeBSD$"); 64 65 #include "opt_ipsec.h" 66 #include "opt_inet6.h" 67 68 #include <sys/param.h> 69 #include <sys/errno.h> 70 #include <sys/jail.h> 71 #include <sys/kernel.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/priv.h> 76 #include <sys/proc.h> 77 #include <sys/protosw.h> 78 #include <sys/signalvar.h> 79 #include <sys/socket.h> 80 #include <sys/socketvar.h> 81 #include <sys/sx.h> 82 #include <sys/syslog.h> 83 84 #include <net/if.h> 85 #include <net/if_var.h> 86 #include <net/if_types.h> 87 #include <net/route.h> 88 #include <net/vnet.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_var.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/in_pcb.h> 94 95 #include <netinet/icmp6.h> 96 #include <netinet/ip6.h> 97 #include <netinet/ip_var.h> 98 #include <netinet6/ip6protosw.h> 99 #include <netinet6/ip6_mroute.h> 100 #include <netinet6/in6_pcb.h> 101 #include <netinet6/ip6_var.h> 102 #include <netinet6/nd6.h> 103 #include <netinet6/raw_ip6.h> 104 #include <netinet6/scope6_var.h> 105 #include <netinet6/send.h> 106 107 #ifdef IPSEC 108 #include <netipsec/ipsec.h> 109 #include <netipsec/ipsec6.h> 110 #endif /* IPSEC */ 111 112 #include <machine/stdarg.h> 113 114 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 115 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 116 117 /* 118 * Raw interface to IP6 protocol. 119 */ 120 121 VNET_DECLARE(struct inpcbhead, ripcb); 122 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 123 #define V_ripcb VNET(ripcb) 124 #define V_ripcbinfo VNET(ripcbinfo) 125 126 extern u_long rip_sendspace; 127 extern u_long rip_recvspace; 128 129 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 130 VNET_PCPUSTAT_SYSINIT(rip6stat); 131 132 #ifdef VIMAGE 133 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 134 #endif /* VIMAGE */ 135 136 /* 137 * Hooks for multicast routing. They all default to NULL, so leave them not 138 * initialized and rely on BSS being set to 0. 139 */ 140 141 /* 142 * The socket used to communicate with the multicast routing daemon. 143 */ 144 VNET_DEFINE(struct socket *, ip6_mrouter); 145 146 /* 147 * The various mrouter functions. 148 */ 149 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 150 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 151 int (*ip6_mrouter_done)(void); 152 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 153 int (*mrt6_ioctl)(u_long, caddr_t); 154 155 /* 156 * Setup generic address and protocol structures for raw_input routine, then 157 * pass them along with mbuf chain. 158 */ 159 int 160 rip6_input(struct mbuf **mp, int *offp, int proto) 161 { 162 struct ifnet *ifp; 163 struct mbuf *m = *mp; 164 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 165 register struct inpcb *in6p; 166 struct inpcb *last = 0; 167 struct mbuf *opts = NULL; 168 struct sockaddr_in6 fromsa; 169 170 RIP6STAT_INC(rip6s_ipackets); 171 172 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 173 /* XXX Send icmp6 host/port unreach? */ 174 m_freem(m); 175 return (IPPROTO_DONE); 176 } 177 178 init_sin6(&fromsa, m); /* general init */ 179 180 ifp = m->m_pkthdr.rcvif; 181 182 INP_INFO_RLOCK(&V_ripcbinfo); 183 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 184 /* XXX inp locking */ 185 if ((in6p->inp_vflag & INP_IPV6) == 0) 186 continue; 187 if (in6p->inp_ip_p && 188 in6p->inp_ip_p != proto) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 192 continue; 193 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 194 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 195 continue; 196 if (jailed_without_vnet(in6p->inp_cred)) { 197 /* 198 * Allow raw socket in jail to receive multicast; 199 * assume process had PRIV_NETINET_RAW at attach, 200 * and fall through into normal filter path if so. 201 */ 202 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 203 prison_check_ip6(in6p->inp_cred, 204 &ip6->ip6_dst) != 0) 205 continue; 206 } 207 INP_RLOCK(in6p); 208 if (in6p->in6p_cksum != -1) { 209 RIP6STAT_INC(rip6s_isum); 210 if (in6_cksum(m, proto, *offp, 211 m->m_pkthdr.len - *offp)) { 212 INP_RUNLOCK(in6p); 213 RIP6STAT_INC(rip6s_badsum); 214 continue; 215 } 216 } 217 /* 218 * If this raw socket has multicast state, and we 219 * have received a multicast, check if this socket 220 * should receive it, as multicast filtering is now 221 * the responsibility of the transport layer. 222 */ 223 if (in6p->in6p_moptions && 224 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 225 /* 226 * If the incoming datagram is for MLD, allow it 227 * through unconditionally to the raw socket. 228 * 229 * Use the M_RTALERT_MLD flag to check for MLD 230 * traffic without having to inspect the mbuf chain 231 * more deeply, as all MLDv1/v2 host messages MUST 232 * contain the Router Alert option. 233 * 234 * In the case of MLDv1, we may not have explicitly 235 * joined the group, and may have set IFF_ALLMULTI 236 * on the interface. im6o_mc_filter() may discard 237 * control traffic we actually need to see. 238 * 239 * Userland multicast routing daemons should continue 240 * filter the control traffic appropriately. 241 */ 242 int blocked; 243 244 blocked = MCAST_PASS; 245 if ((m->m_flags & M_RTALERT_MLD) == 0) { 246 struct sockaddr_in6 mcaddr; 247 248 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 249 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 250 mcaddr.sin6_family = AF_INET6; 251 mcaddr.sin6_addr = ip6->ip6_dst; 252 253 blocked = im6o_mc_filter(in6p->in6p_moptions, 254 ifp, 255 (struct sockaddr *)&mcaddr, 256 (struct sockaddr *)&fromsa); 257 } 258 if (blocked != MCAST_PASS) { 259 IP6STAT_INC(ip6s_notmember); 260 INP_RUNLOCK(in6p); 261 continue; 262 } 263 } 264 if (last != NULL) { 265 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 266 267 #ifdef IPSEC 268 /* 269 * Check AH/ESP integrity. 270 */ 271 if (n && ipsec6_in_reject(n, last)) { 272 m_freem(n); 273 IPSEC6STAT_INC(ips_in_polvio); 274 /* Do not inject data into pcb. */ 275 } else 276 #endif /* IPSEC */ 277 if (n) { 278 if (last->inp_flags & INP_CONTROLOPTS || 279 last->inp_socket->so_options & SO_TIMESTAMP) 280 ip6_savecontrol(last, n, &opts); 281 /* strip intermediate headers */ 282 m_adj(n, *offp); 283 if (sbappendaddr(&last->inp_socket->so_rcv, 284 (struct sockaddr *)&fromsa, 285 n, opts) == 0) { 286 m_freem(n); 287 if (opts) 288 m_freem(opts); 289 RIP6STAT_INC(rip6s_fullsock); 290 } else 291 sorwakeup(last->inp_socket); 292 opts = NULL; 293 } 294 INP_RUNLOCK(last); 295 } 296 last = in6p; 297 } 298 INP_INFO_RUNLOCK(&V_ripcbinfo); 299 #ifdef IPSEC 300 /* 301 * Check AH/ESP integrity. 302 */ 303 if ((last != NULL) && ipsec6_in_reject(m, last)) { 304 m_freem(m); 305 IPSEC6STAT_INC(ips_in_polvio); 306 IP6STAT_DEC(ip6s_delivered); 307 /* Do not inject data into pcb. */ 308 INP_RUNLOCK(last); 309 } else 310 #endif /* IPSEC */ 311 if (last != NULL) { 312 if (last->inp_flags & INP_CONTROLOPTS || 313 last->inp_socket->so_options & SO_TIMESTAMP) 314 ip6_savecontrol(last, m, &opts); 315 /* Strip intermediate headers. */ 316 m_adj(m, *offp); 317 if (sbappendaddr(&last->inp_socket->so_rcv, 318 (struct sockaddr *)&fromsa, m, opts) == 0) { 319 m_freem(m); 320 if (opts) 321 m_freem(opts); 322 RIP6STAT_INC(rip6s_fullsock); 323 } else 324 sorwakeup(last->inp_socket); 325 INP_RUNLOCK(last); 326 } else { 327 RIP6STAT_INC(rip6s_nosock); 328 if (m->m_flags & M_MCAST) 329 RIP6STAT_INC(rip6s_nosockmcast); 330 if (proto == IPPROTO_NONE) 331 m_freem(m); 332 else { 333 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 334 icmp6_error(m, ICMP6_PARAM_PROB, 335 ICMP6_PARAMPROB_NEXTHEADER, 336 prvnxtp - mtod(m, char *)); 337 } 338 IP6STAT_DEC(ip6s_delivered); 339 } 340 return (IPPROTO_DONE); 341 } 342 343 void 344 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 345 { 346 struct ip6_hdr *ip6; 347 struct mbuf *m; 348 int off = 0; 349 struct ip6ctlparam *ip6cp = NULL; 350 const struct sockaddr_in6 *sa6_src = NULL; 351 void *cmdarg; 352 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 353 354 if (sa->sa_family != AF_INET6 || 355 sa->sa_len != sizeof(struct sockaddr_in6)) 356 return; 357 358 if ((unsigned)cmd >= PRC_NCMDS) 359 return; 360 if (PRC_IS_REDIRECT(cmd)) 361 notify = in6_rtchange, d = NULL; 362 else if (cmd == PRC_HOSTDEAD) 363 d = NULL; 364 else if (inet6ctlerrmap[cmd] == 0) 365 return; 366 367 /* 368 * If the parameter is from icmp6, decode it. 369 */ 370 if (d != NULL) { 371 ip6cp = (struct ip6ctlparam *)d; 372 m = ip6cp->ip6c_m; 373 ip6 = ip6cp->ip6c_ip6; 374 off = ip6cp->ip6c_off; 375 cmdarg = ip6cp->ip6c_cmdarg; 376 sa6_src = ip6cp->ip6c_src; 377 } else { 378 m = NULL; 379 ip6 = NULL; 380 cmdarg = NULL; 381 sa6_src = &sa6_any; 382 } 383 384 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 385 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 386 } 387 388 /* 389 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 390 * may have setup with control call. 391 */ 392 int 393 rip6_output(struct mbuf *m, struct socket *so, ...) 394 { 395 struct mbuf *control; 396 struct m_tag *mtag; 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, so); 412 dstsock = va_arg(ap, struct sockaddr_in6 *); 413 control = va_arg(ap, struct mbuf *); 414 va_end(ap); 415 416 in6p = sotoinpcb(so); 417 INP_WLOCK(in6p); 418 419 dst = &dstsock->sin6_addr; 420 if (control != NULL) { 421 if ((error = ip6_setpktopts(control, &opt, 422 in6p->in6p_outputopts, so->so_cred, 423 so->so_proto->pr_protocol)) != 0) { 424 goto bad; 425 } 426 optp = &opt; 427 } else 428 optp = in6p->in6p_outputopts; 429 430 /* 431 * Check and convert scope zone ID into internal form. 432 * 433 * XXX: we may still need to determine the zone later. 434 */ 435 if (!(so->so_state & SS_ISCONNECTED)) { 436 if (!optp || !optp->ip6po_pktinfo || 437 !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_NOWAIT); 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 RIP6STAT_INC(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 */ 581 int 582 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 583 { 584 struct inpcb *inp; 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 if (sopt->sopt_level == SOL_SOCKET && 595 sopt->sopt_name == SO_SETFIB) { 596 inp = sotoinpcb(so); 597 INP_WLOCK(inp); 598 inp->inp_inc.inc_fibnum = so->so_fibnum; 599 INP_WUNLOCK(inp); 600 return (0); 601 } 602 return (EINVAL); 603 } 604 605 error = 0; 606 607 switch (sopt->sopt_dir) { 608 case SOPT_GET: 609 switch (sopt->sopt_name) { 610 case MRT6_INIT: 611 case MRT6_DONE: 612 case MRT6_ADD_MIF: 613 case MRT6_DEL_MIF: 614 case MRT6_ADD_MFC: 615 case MRT6_DEL_MFC: 616 case MRT6_PIM: 617 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 618 EOPNOTSUPP; 619 break; 620 case IPV6_CHECKSUM: 621 error = ip6_raw_ctloutput(so, sopt); 622 break; 623 default: 624 error = ip6_ctloutput(so, sopt); 625 break; 626 } 627 break; 628 629 case SOPT_SET: 630 switch (sopt->sopt_name) { 631 case MRT6_INIT: 632 case MRT6_DONE: 633 case MRT6_ADD_MIF: 634 case MRT6_DEL_MIF: 635 case MRT6_ADD_MFC: 636 case MRT6_DEL_MFC: 637 case MRT6_PIM: 638 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 639 EOPNOTSUPP; 640 break; 641 case IPV6_CHECKSUM: 642 error = ip6_raw_ctloutput(so, sopt); 643 break; 644 default: 645 error = ip6_ctloutput(so, sopt); 646 break; 647 } 648 break; 649 } 650 651 return (error); 652 } 653 654 static int 655 rip6_attach(struct socket *so, int proto, struct thread *td) 656 { 657 struct inpcb *inp; 658 struct icmp6_filter *filter; 659 int error; 660 661 inp = sotoinpcb(so); 662 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 663 664 error = priv_check(td, PRIV_NETINET_RAW); 665 if (error) 666 return (error); 667 error = soreserve(so, rip_sendspace, rip_recvspace); 668 if (error) 669 return (error); 670 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 671 if (filter == NULL) 672 return (ENOMEM); 673 INP_INFO_WLOCK(&V_ripcbinfo); 674 error = in_pcballoc(so, &V_ripcbinfo); 675 if (error) { 676 INP_INFO_WUNLOCK(&V_ripcbinfo); 677 free(filter, M_PCB); 678 return (error); 679 } 680 inp = (struct inpcb *)so->so_pcb; 681 INP_INFO_WUNLOCK(&V_ripcbinfo); 682 inp->inp_vflag |= INP_IPV6; 683 inp->inp_ip_p = (long)proto; 684 inp->in6p_hops = -1; /* use kernel default */ 685 inp->in6p_cksum = -1; 686 inp->in6p_icmp6filt = filter; 687 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 688 INP_WUNLOCK(inp); 689 return (0); 690 } 691 692 static void 693 rip6_detach(struct socket *so) 694 { 695 struct inpcb *inp; 696 697 inp = sotoinpcb(so); 698 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 699 700 if (so == V_ip6_mrouter && ip6_mrouter_done) 701 ip6_mrouter_done(); 702 /* xxx: RSVP */ 703 INP_INFO_WLOCK(&V_ripcbinfo); 704 INP_WLOCK(inp); 705 free(inp->in6p_icmp6filt, M_PCB); 706 in_pcbdetach(inp); 707 in_pcbfree(inp); 708 INP_INFO_WUNLOCK(&V_ripcbinfo); 709 } 710 711 /* XXXRW: This can't ever be called. */ 712 static void 713 rip6_abort(struct socket *so) 714 { 715 struct inpcb *inp; 716 717 inp = sotoinpcb(so); 718 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 719 720 soisdisconnected(so); 721 } 722 723 static void 724 rip6_close(struct socket *so) 725 { 726 struct inpcb *inp; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 730 731 soisdisconnected(so); 732 } 733 734 static int 735 rip6_disconnect(struct socket *so) 736 { 737 struct inpcb *inp; 738 739 inp = sotoinpcb(so); 740 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 741 742 if ((so->so_state & SS_ISCONNECTED) == 0) 743 return (ENOTCONN); 744 inp->in6p_faddr = in6addr_any; 745 rip6_abort(so); 746 return (0); 747 } 748 749 static int 750 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 751 { 752 struct inpcb *inp; 753 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 754 struct ifaddr *ifa = NULL; 755 int error = 0; 756 757 inp = sotoinpcb(so); 758 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 759 760 if (nam->sa_len != sizeof(*addr)) 761 return (EINVAL); 762 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 763 return (error); 764 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 765 return (EADDRNOTAVAIL); 766 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 767 return (error); 768 769 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 770 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 771 return (EADDRNOTAVAIL); 772 if (ifa != NULL && 773 ((struct in6_ifaddr *)ifa)->ia6_flags & 774 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 775 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 776 ifa_free(ifa); 777 return (EADDRNOTAVAIL); 778 } 779 if (ifa != NULL) 780 ifa_free(ifa); 781 INP_INFO_WLOCK(&V_ripcbinfo); 782 INP_WLOCK(inp); 783 inp->in6p_laddr = addr->sin6_addr; 784 INP_WUNLOCK(inp); 785 INP_INFO_WUNLOCK(&V_ripcbinfo); 786 return (0); 787 } 788 789 static int 790 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 791 { 792 struct inpcb *inp; 793 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 794 struct in6_addr in6a; 795 struct ifnet *ifp = NULL; 796 int error = 0, scope_ambiguous = 0; 797 798 inp = sotoinpcb(so); 799 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 800 801 if (nam->sa_len != sizeof(*addr)) 802 return (EINVAL); 803 if (TAILQ_EMPTY(&V_ifnet)) 804 return (EADDRNOTAVAIL); 805 if (addr->sin6_family != AF_INET6) 806 return (EAFNOSUPPORT); 807 808 /* 809 * Application should provide a proper zone ID or the use of default 810 * zone IDs should be enabled. Unfortunately, some applications do 811 * not behave as it should, so we need a workaround. Even if an 812 * appropriate ID is not determined, we'll see if we can determine 813 * the outgoing interface. If we can, determine the zone ID based on 814 * the interface below. 815 */ 816 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 817 scope_ambiguous = 1; 818 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 819 return (error); 820 821 INP_INFO_WLOCK(&V_ripcbinfo); 822 INP_WLOCK(inp); 823 /* Source address selection. XXX: need pcblookup? */ 824 error = in6_selectsrc(addr, inp->in6p_outputopts, 825 inp, NULL, so->so_cred, &ifp, &in6a); 826 if (error) { 827 INP_WUNLOCK(inp); 828 INP_INFO_WUNLOCK(&V_ripcbinfo); 829 return (error); 830 } 831 832 /* XXX: see above */ 833 if (ifp && scope_ambiguous && 834 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 835 INP_WUNLOCK(inp); 836 INP_INFO_WUNLOCK(&V_ripcbinfo); 837 return (error); 838 } 839 inp->in6p_faddr = addr->sin6_addr; 840 inp->in6p_laddr = in6a; 841 soisconnected(so); 842 INP_WUNLOCK(inp); 843 INP_INFO_WUNLOCK(&V_ripcbinfo); 844 return (0); 845 } 846 847 static int 848 rip6_shutdown(struct socket *so) 849 { 850 struct inpcb *inp; 851 852 inp = sotoinpcb(so); 853 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 854 855 INP_WLOCK(inp); 856 socantsendmore(so); 857 INP_WUNLOCK(inp); 858 return (0); 859 } 860 861 static int 862 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 863 struct mbuf *control, struct thread *td) 864 { 865 struct inpcb *inp; 866 struct sockaddr_in6 tmp; 867 struct sockaddr_in6 *dst; 868 int ret; 869 870 inp = sotoinpcb(so); 871 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 872 873 /* Always copy sockaddr to avoid overwrites. */ 874 /* Unlocked read. */ 875 if (so->so_state & SS_ISCONNECTED) { 876 if (nam) { 877 m_freem(m); 878 return (EISCONN); 879 } 880 /* XXX */ 881 bzero(&tmp, sizeof(tmp)); 882 tmp.sin6_family = AF_INET6; 883 tmp.sin6_len = sizeof(struct sockaddr_in6); 884 INP_RLOCK(inp); 885 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 886 sizeof(struct in6_addr)); 887 INP_RUNLOCK(inp); 888 dst = &tmp; 889 } else { 890 if (nam == NULL) { 891 m_freem(m); 892 return (ENOTCONN); 893 } 894 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 895 m_freem(m); 896 return (EINVAL); 897 } 898 tmp = *(struct sockaddr_in6 *)nam; 899 dst = &tmp; 900 901 if (dst->sin6_family == AF_UNSPEC) { 902 /* 903 * XXX: we allow this case for backward 904 * compatibility to buggy applications that 905 * rely on old (and wrong) kernel behavior. 906 */ 907 log(LOG_INFO, "rip6 SEND: address family is " 908 "unspec. Assume AF_INET6\n"); 909 dst->sin6_family = AF_INET6; 910 } else if (dst->sin6_family != AF_INET6) { 911 m_freem(m); 912 return(EAFNOSUPPORT); 913 } 914 } 915 ret = rip6_output(m, so, dst, control); 916 return (ret); 917 } 918 919 struct pr_usrreqs rip6_usrreqs = { 920 .pru_abort = rip6_abort, 921 .pru_attach = rip6_attach, 922 .pru_bind = rip6_bind, 923 .pru_connect = rip6_connect, 924 .pru_control = in6_control, 925 .pru_detach = rip6_detach, 926 .pru_disconnect = rip6_disconnect, 927 .pru_peeraddr = in6_getpeeraddr, 928 .pru_send = rip6_send, 929 .pru_shutdown = rip6_shutdown, 930 .pru_sockaddr = in6_getsockaddr, 931 .pru_close = rip6_close, 932 }; 933