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_types.h> 86#include <net/route.h> 87#include <net/vnet.h> 88 89#include <netinet/in.h> 90#include <netinet/in_var.h> 91#include <netinet/in_systm.h> 92#include <netinet/in_pcb.h> 93 94#include <netinet/icmp6.h> 95#include <netinet/ip6.h> 96#include <netinet/ip_var.h> 97#include <netinet6/ip6protosw.h> 98#include <netinet6/ip6_mroute.h> 99#include <netinet6/in6_pcb.h> 100#include <netinet6/ip6_var.h> 101#include <netinet6/nd6.h> 102#include <netinet6/raw_ip6.h> 103#include <netinet6/scope6_var.h> 104#include <netinet6/send.h> 105 106#ifdef IPSEC 107#include <netipsec/ipsec.h> 108#include <netipsec/ipsec6.h> 109#endif /* IPSEC */ 110 111#include <machine/stdarg.h> 112 113#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 114#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116/* 117 * Raw interface to IP6 protocol. 118 */ 119 120VNET_DECLARE(struct inpcbhead, ripcb); 121VNET_DECLARE(struct inpcbinfo, ripcbinfo); 122#define V_ripcb VNET(ripcb) 123#define V_ripcbinfo VNET(ripcbinfo) 124 125extern u_long rip_sendspace; 126extern u_long rip_recvspace; 127 128VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 129VNET_PCPUSTAT_SYSINIT(rip6stat); 130 131#ifdef VIMAGE 132VNET_PCPUSTAT_SYSUNINIT(rip6stat); 133#endif /* VIMAGE */ 134 135/* 136 * Hooks for multicast routing. They all default to NULL, so leave them not 137 * initialized and rely on BSS being set to 0. 138 */ 139 140/* 141 * The socket used to communicate with the multicast routing daemon. 142 */ 143VNET_DEFINE(struct socket *, ip6_mrouter); 144 145/* 146 * The various mrouter functions. 147 */ 148int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 149int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 150int (*ip6_mrouter_done)(void); 151int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 152int (*mrt6_ioctl)(u_long, caddr_t); 153 154/* 155 * Setup generic address and protocol structures for raw_input routine, then 156 * pass them along with mbuf chain. 157 */ 158int 159rip6_input(struct mbuf **mp, int *offp, int proto) 160{ 161 struct ifnet *ifp; 162 struct mbuf *m = *mp; 163 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 164 register struct inpcb *in6p; 165 struct inpcb *last = 0; 166 struct mbuf *opts = NULL; 167 struct sockaddr_in6 fromsa; 168 169 RIP6STAT_INC(rip6s_ipackets); 170 171 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 172 /* XXX Send icmp6 host/port unreach? */ 173 m_freem(m); 174 return (IPPROTO_DONE); 175 } 176 177 init_sin6(&fromsa, m); /* general init */ 178 179 ifp = m->m_pkthdr.rcvif; 180 181 INP_INFO_RLOCK(&V_ripcbinfo); 182 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 183 /* XXX inp locking */ 184 if ((in6p->inp_vflag & INP_IPV6) == 0) 185 continue; 186 if (in6p->inp_ip_p && 187 in6p->inp_ip_p != proto) 188 continue; 189 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 190 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 191 continue; 192 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 193 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 194 continue; 195 if (jailed_without_vnet(in6p->inp_cred)) { 196 /* 197 * Allow raw socket in jail to receive multicast; 198 * assume process had PRIV_NETINET_RAW at attach, 199 * and fall through into normal filter path if so. 200 */ 201 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 202 prison_check_ip6(in6p->inp_cred, 203 &ip6->ip6_dst) != 0) 204 continue; 205 } 206 INP_RLOCK(in6p); 207 if (in6p->in6p_cksum != -1) { 208 RIP6STAT_INC(rip6s_isum); 209 if (in6_cksum(m, proto, *offp, 210 m->m_pkthdr.len - *offp)) { 211 INP_RUNLOCK(in6p); 212 RIP6STAT_INC(rip6s_badsum); 213 continue; 214 } 215 } 216 /* 217 * If this raw socket has multicast state, and we 218 * have received a multicast, check if this socket 219 * should receive it, as multicast filtering is now 220 * the responsibility of the transport layer. 221 */ 222 if (in6p->in6p_moptions && 223 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 224 /* 225 * If the incoming datagram is for MLD, allow it 226 * through unconditionally to the raw socket. 227 * 228 * Use the M_RTALERT_MLD flag to check for MLD 229 * traffic without having to inspect the mbuf chain 230 * more deeply, as all MLDv1/v2 host messages MUST 231 * contain the Router Alert option. 232 * 233 * In the case of MLDv1, we may not have explicitly 234 * joined the group, and may have set IFF_ALLMULTI 235 * on the interface. im6o_mc_filter() may discard 236 * control traffic we actually need to see. 237 * 238 * Userland multicast routing daemons should continue 239 * filter the control traffic appropriately. 240 */ 241 int blocked; 242 243 blocked = MCAST_PASS; 244 if ((m->m_flags & M_RTALERT_MLD) == 0) { 245 struct sockaddr_in6 mcaddr; 246 247 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 248 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 249 mcaddr.sin6_family = AF_INET6; 250 mcaddr.sin6_addr = ip6->ip6_dst; 251 252 blocked = im6o_mc_filter(in6p->in6p_moptions, 253 ifp, 254 (struct sockaddr *)&mcaddr, 255 (struct sockaddr *)&fromsa); 256 } 257 if (blocked != MCAST_PASS) { 258 IP6STAT_INC(ip6s_notmember); 259 INP_RUNLOCK(in6p); 260 continue; 261 } 262 } 263 if (last != NULL) { 264 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 265 266#ifdef IPSEC 267 /* 268 * Check AH/ESP integrity. 269 */ 270 if (n && ipsec6_in_reject(n, last)) { 271 m_freem(n); 272 IPSEC6STAT_INC(ips_in_polvio); 273 /* Do not inject data into pcb. */ 274 } else 275#endif /* IPSEC */ 276 if (n) { 277 if (last->inp_flags & INP_CONTROLOPTS || 278 last->inp_socket->so_options & SO_TIMESTAMP) 279 ip6_savecontrol(last, n, &opts); 280 /* strip intermediate headers */ 281 m_adj(n, *offp); 282 if (sbappendaddr(&last->inp_socket->so_rcv, 283 (struct sockaddr *)&fromsa, 284 n, opts) == 0) { 285 m_freem(n); 286 if (opts) 287 m_freem(opts); 288 RIP6STAT_INC(rip6s_fullsock); 289 } else 290 sorwakeup(last->inp_socket); 291 opts = NULL; 292 } 293 INP_RUNLOCK(last); 294 } 295 last = in6p; 296 } 297 INP_INFO_RUNLOCK(&V_ripcbinfo); 298#ifdef IPSEC 299 /* 300 * Check AH/ESP integrity. 301 */ 302 if ((last != NULL) && ipsec6_in_reject(m, last)) { 303 m_freem(m); 304 IPSEC6STAT_INC(ips_in_polvio); 305 IP6STAT_DEC(ip6s_delivered); 306 /* Do not inject data into pcb. */ 307 INP_RUNLOCK(last); 308 } else 309#endif /* IPSEC */ 310 if (last != NULL) { 311 if (last->inp_flags & INP_CONTROLOPTS || 312 last->inp_socket->so_options & SO_TIMESTAMP) 313 ip6_savecontrol(last, m, &opts); 314 /* Strip intermediate headers. */ 315 m_adj(m, *offp); 316 if (sbappendaddr(&last->inp_socket->so_rcv, 317 (struct sockaddr *)&fromsa, m, opts) == 0) { 318 m_freem(m); 319 if (opts) 320 m_freem(opts); 321 RIP6STAT_INC(rip6s_fullsock); 322 } else 323 sorwakeup(last->inp_socket); 324 INP_RUNLOCK(last); 325 } else { 326 RIP6STAT_INC(rip6s_nosock); 327 if (m->m_flags & M_MCAST) 328 RIP6STAT_INC(rip6s_nosockmcast); 329 if (proto == IPPROTO_NONE) 330 m_freem(m); 331 else { 332 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 333 icmp6_error(m, ICMP6_PARAM_PROB, 334 ICMP6_PARAMPROB_NEXTHEADER, 335 prvnxtp - mtod(m, char *)); 336 } 337 IP6STAT_DEC(ip6s_delivered); 338 } 339 return (IPPROTO_DONE); 340} 341 342void 343rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 344{ 345 struct ip6_hdr *ip6; 346 struct mbuf *m; 347 int off = 0; 348 struct ip6ctlparam *ip6cp = NULL; 349 const struct sockaddr_in6 *sa6_src = NULL; 350 void *cmdarg; 351 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 352 353 if (sa->sa_family != AF_INET6 || 354 sa->sa_len != sizeof(struct sockaddr_in6)) 355 return; 356 357 if ((unsigned)cmd >= PRC_NCMDS) 358 return; 359 if (PRC_IS_REDIRECT(cmd)) 360 notify = in6_rtchange, d = NULL; 361 else if (cmd == PRC_HOSTDEAD) 362 d = NULL; 363 else if (inet6ctlerrmap[cmd] == 0) 364 return; 365 366 /* 367 * If the parameter is from icmp6, decode it. 368 */ 369 if (d != NULL) { 370 ip6cp = (struct ip6ctlparam *)d; 371 m = ip6cp->ip6c_m; 372 ip6 = ip6cp->ip6c_ip6; 373 off = ip6cp->ip6c_off; 374 cmdarg = ip6cp->ip6c_cmdarg; 375 sa6_src = ip6cp->ip6c_src; 376 } else { 377 m = NULL; 378 ip6 = NULL; 379 cmdarg = NULL; 380 sa6_src = &sa6_any; 381 } 382 383 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 384 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 385} 386 387/* 388 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 389 * may have setup with control call. 390 */ 391int 392#if __STDC__ 393rip6_output(struct mbuf *m, ...) 394#else 395rip6_output(m, va_alist) 396 struct mbuf *m; 397 va_dcl 398#endif 399{ 400 struct mbuf *control; 401 struct m_tag *mtag; 402 struct socket *so; 403 struct sockaddr_in6 *dstsock; 404 struct in6_addr *dst; 405 struct ip6_hdr *ip6; 406 struct inpcb *in6p; 407 u_int plen = m->m_pkthdr.len; 408 int error = 0; 409 struct ip6_pktopts opt, *optp; 410 struct ifnet *oifp = NULL; 411 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 412 int scope_ambiguous = 0; 413 int use_defzone = 0; 414 struct in6_addr in6a; 415 va_list ap; 416 417 va_start(ap, m); 418 so = va_arg(ap, struct socket *); 419 dstsock = va_arg(ap, struct sockaddr_in6 *); 420 control = va_arg(ap, struct mbuf *); 421 va_end(ap); 422 423 in6p = sotoinpcb(so); 424 INP_WLOCK(in6p); 425 426 dst = &dstsock->sin6_addr; 427 if (control != NULL) { 428 if ((error = ip6_setpktopts(control, &opt, 429 in6p->in6p_outputopts, so->so_cred, 430 so->so_proto->pr_protocol)) != 0) { 431 goto bad; 432 } 433 optp = &opt; 434 } else 435 optp = in6p->in6p_outputopts; 436 437 /* 438 * Check and convert scope zone ID into internal form. 439 * 440 * XXX: we may still need to determine the zone later. 441 */ 442 if (!(so->so_state & SS_ISCONNECTED)) { 443 if (!optp || !optp->ip6po_pktinfo || 444 !optp->ip6po_pktinfo->ipi6_ifindex) 445 use_defzone = V_ip6_use_defzone; 446 if (dstsock->sin6_scope_id == 0 && !use_defzone) 447 scope_ambiguous = 1; 448 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 449 goto bad; 450 } 451 452 /* 453 * For an ICMPv6 packet, we should know its type and code to update 454 * statistics. 455 */ 456 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 457 struct icmp6_hdr *icmp6; 458 if (m->m_len < sizeof(struct icmp6_hdr) && 459 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 460 error = ENOBUFS; 461 goto bad; 462 } 463 icmp6 = mtod(m, struct icmp6_hdr *); 464 type = icmp6->icmp6_type; 465 code = icmp6->icmp6_code; 466 } 467 468 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 469 if (m == NULL) { 470 error = ENOBUFS; 471 goto bad; 472 } 473 ip6 = mtod(m, struct ip6_hdr *); 474 475 /* 476 * Source address selection. 477 */ 478 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 479 &oifp, &in6a); 480 if (error) 481 goto bad; 482 error = prison_check_ip6(in6p->inp_cred, &in6a); 483 if (error != 0) 484 goto bad; 485 ip6->ip6_src = in6a; 486 487 if (oifp && scope_ambiguous) { 488 /* 489 * Application should provide a proper zone ID or the use of 490 * default zone IDs should be enabled. Unfortunately, some 491 * applications do not behave as it should, so we need a 492 * workaround. Even if an appropriate ID is not determined 493 * (when it's required), if we can determine the outgoing 494 * interface. determine the zone ID based on the interface. 495 */ 496 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 497 if (error != 0) 498 goto bad; 499 } 500 ip6->ip6_dst = dstsock->sin6_addr; 501 502 /* 503 * Fill in the rest of the IPv6 header fields. 504 */ 505 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 506 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 507 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 508 (IPV6_VERSION & IPV6_VERSION_MASK); 509 510 /* 511 * ip6_plen will be filled in ip6_output, so not fill it here. 512 */ 513 ip6->ip6_nxt = in6p->inp_ip_p; 514 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 515 516 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 517 in6p->in6p_cksum != -1) { 518 struct mbuf *n; 519 int off; 520 u_int16_t *p; 521 522 /* Compute checksum. */ 523 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 524 off = offsetof(struct icmp6_hdr, icmp6_cksum); 525 else 526 off = in6p->in6p_cksum; 527 if (plen < off + 1) { 528 error = EINVAL; 529 goto bad; 530 } 531 off += sizeof(struct ip6_hdr); 532 533 n = m; 534 while (n && n->m_len <= off) { 535 off -= n->m_len; 536 n = n->m_next; 537 } 538 if (!n) 539 goto bad; 540 p = (u_int16_t *)(mtod(n, caddr_t) + off); 541 *p = 0; 542 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 543 } 544 545 /* 546 * Send RA/RS messages to user land for protection, before sending 547 * them to rtadvd/rtsol. 548 */ 549 if ((send_sendso_input_hook != NULL) && 550 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 551 switch (type) { 552 case ND_ROUTER_ADVERT: 553 case ND_ROUTER_SOLICIT: 554 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 555 sizeof(unsigned short), M_NOWAIT); 556 if (mtag == NULL) 557 goto bad; 558 m_tag_prepend(m, mtag); 559 } 560 } 561 562 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 563 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 564 if (oifp) 565 icmp6_ifoutstat_inc(oifp, type, code); 566 ICMP6STAT_INC(icp6s_outhist[type]); 567 } else 568 RIP6STAT_INC(rip6s_opackets); 569 570 goto freectl; 571 572 bad: 573 if (m) 574 m_freem(m); 575 576 freectl: 577 if (control != NULL) { 578 ip6_clearpktopts(&opt, -1); 579 m_freem(control); 580 } 581 INP_WUNLOCK(in6p); 582 return (error); 583} 584 585/* 586 * Raw IPv6 socket option processing. 587 */ 588int 589rip6_ctloutput(struct socket *so, struct sockopt *sopt) 590{ 591 struct inpcb *inp; 592 int error; 593 594 if (sopt->sopt_level == IPPROTO_ICMPV6) 595 /* 596 * XXX: is it better to call icmp6_ctloutput() directly 597 * from protosw? 598 */ 599 return (icmp6_ctloutput(so, sopt)); 600 else if (sopt->sopt_level != IPPROTO_IPV6) { 601 if (sopt->sopt_level == SOL_SOCKET && 602 sopt->sopt_name == SO_SETFIB) { 603 inp = sotoinpcb(so); 604 INP_WLOCK(inp); 605 inp->inp_inc.inc_fibnum = so->so_fibnum; 606 INP_WUNLOCK(inp); 607 return (0); 608 } 609 return (EINVAL); 610 } 611 612 error = 0; 613 614 switch (sopt->sopt_dir) { 615 case SOPT_GET: 616 switch (sopt->sopt_name) { 617 case MRT6_INIT: 618 case MRT6_DONE: 619 case MRT6_ADD_MIF: 620 case MRT6_DEL_MIF: 621 case MRT6_ADD_MFC: 622 case MRT6_DEL_MFC: 623 case MRT6_PIM: 624 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 625 EOPNOTSUPP; 626 break; 627 case IPV6_CHECKSUM: 628 error = ip6_raw_ctloutput(so, sopt); 629 break; 630 default: 631 error = ip6_ctloutput(so, sopt); 632 break; 633 } 634 break; 635 636 case SOPT_SET: 637 switch (sopt->sopt_name) { 638 case MRT6_INIT: 639 case MRT6_DONE: 640 case MRT6_ADD_MIF: 641 case MRT6_DEL_MIF: 642 case MRT6_ADD_MFC: 643 case MRT6_DEL_MFC: 644 case MRT6_PIM: 645 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 646 EOPNOTSUPP; 647 break; 648 case IPV6_CHECKSUM: 649 error = ip6_raw_ctloutput(so, sopt); 650 break; 651 default: 652 error = ip6_ctloutput(so, sopt); 653 break; 654 } 655 break; 656 } 657 658 return (error); 659} 660 661static int 662rip6_attach(struct socket *so, int proto, struct thread *td) 663{ 664 struct inpcb *inp; 665 struct icmp6_filter *filter; 666 int error; 667 668 inp = sotoinpcb(so); 669 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 670 671 error = priv_check(td, PRIV_NETINET_RAW); 672 if (error) 673 return (error); 674 error = soreserve(so, rip_sendspace, rip_recvspace); 675 if (error) 676 return (error); 677 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 678 if (filter == NULL) 679 return (ENOMEM); 680 INP_INFO_WLOCK(&V_ripcbinfo); 681 error = in_pcballoc(so, &V_ripcbinfo); 682 if (error) { 683 INP_INFO_WUNLOCK(&V_ripcbinfo); 684 free(filter, M_PCB); 685 return (error); 686 } 687 inp = (struct inpcb *)so->so_pcb; 688 INP_INFO_WUNLOCK(&V_ripcbinfo); 689 inp->inp_vflag |= INP_IPV6; 690 inp->inp_ip_p = (long)proto; 691 inp->in6p_hops = -1; /* use kernel default */ 692 inp->in6p_cksum = -1; 693 inp->in6p_icmp6filt = filter; 694 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 695 INP_WUNLOCK(inp); 696 return (0); 697} 698 699static void 700rip6_detach(struct socket *so) 701{ 702 struct inpcb *inp; 703 704 inp = sotoinpcb(so); 705 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 706 707 if (so == V_ip6_mrouter && ip6_mrouter_done) 708 ip6_mrouter_done(); 709 /* xxx: RSVP */ 710 INP_INFO_WLOCK(&V_ripcbinfo); 711 INP_WLOCK(inp); 712 free(inp->in6p_icmp6filt, M_PCB); 713 in_pcbdetach(inp); 714 in_pcbfree(inp); 715 INP_INFO_WUNLOCK(&V_ripcbinfo); 716} 717 718/* XXXRW: This can't ever be called. */ 719static void 720rip6_abort(struct socket *so) 721{ 722 struct inpcb *inp; 723 724 inp = sotoinpcb(so); 725 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 726 727 soisdisconnected(so); 728} 729 730static void 731rip6_close(struct socket *so) 732{ 733 struct inpcb *inp; 734 735 inp = sotoinpcb(so); 736 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 737 738 soisdisconnected(so); 739} 740 741static int 742rip6_disconnect(struct socket *so) 743{ 744 struct inpcb *inp; 745 746 inp = sotoinpcb(so); 747 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 748 749 if ((so->so_state & SS_ISCONNECTED) == 0) 750 return (ENOTCONN); 751 inp->in6p_faddr = in6addr_any; 752 rip6_abort(so); 753 return (0); 754} 755 756static int 757rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 758{ 759 struct inpcb *inp; 760 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 761 struct ifaddr *ifa = NULL; 762 int error = 0; 763 764 inp = sotoinpcb(so); 765 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 766 767 if (nam->sa_len != sizeof(*addr)) 768 return (EINVAL); 769 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 770 return (error); 771 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 772 return (EADDRNOTAVAIL); 773 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 774 return (error); 775 776 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 777 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 778 return (EADDRNOTAVAIL); 779 if (ifa != NULL && 780 ((struct in6_ifaddr *)ifa)->ia6_flags & 781 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 782 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 783 ifa_free(ifa); 784 return (EADDRNOTAVAIL); 785 } 786 if (ifa != NULL) 787 ifa_free(ifa); 788 INP_INFO_WLOCK(&V_ripcbinfo); 789 INP_WLOCK(inp); 790 inp->in6p_laddr = addr->sin6_addr; 791 INP_WUNLOCK(inp); 792 INP_INFO_WUNLOCK(&V_ripcbinfo); 793 return (0); 794} 795 796static int 797rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 798{ 799 struct inpcb *inp; 800 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 801 struct in6_addr in6a; 802 struct ifnet *ifp = NULL; 803 int error = 0, scope_ambiguous = 0; 804 805 inp = sotoinpcb(so); 806 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 807 808 if (nam->sa_len != sizeof(*addr)) 809 return (EINVAL); 810 if (TAILQ_EMPTY(&V_ifnet)) 811 return (EADDRNOTAVAIL); 812 if (addr->sin6_family != AF_INET6) 813 return (EAFNOSUPPORT); 814 815 /* 816 * Application should provide a proper zone ID or the use of default 817 * zone IDs should be enabled. Unfortunately, some applications do 818 * not behave as it should, so we need a workaround. Even if an 819 * appropriate ID is not determined, we'll see if we can determine 820 * the outgoing interface. If we can, determine the zone ID based on 821 * the interface below. 822 */ 823 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 824 scope_ambiguous = 1; 825 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 826 return (error); 827 828 INP_INFO_WLOCK(&V_ripcbinfo); 829 INP_WLOCK(inp); 830 /* Source address selection. XXX: need pcblookup? */ 831 error = in6_selectsrc(addr, inp->in6p_outputopts, 832 inp, NULL, so->so_cred, &ifp, &in6a); 833 if (error) { 834 INP_WUNLOCK(inp); 835 INP_INFO_WUNLOCK(&V_ripcbinfo); 836 return (error); 837 } 838 839 /* XXX: see above */ 840 if (ifp && scope_ambiguous && 841 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 842 INP_WUNLOCK(inp); 843 INP_INFO_WUNLOCK(&V_ripcbinfo); 844 return (error); 845 } 846 inp->in6p_faddr = addr->sin6_addr; 847 inp->in6p_laddr = in6a; 848 soisconnected(so); 849 INP_WUNLOCK(inp); 850 INP_INFO_WUNLOCK(&V_ripcbinfo); 851 return (0); 852} 853 854static int 855rip6_shutdown(struct socket *so) 856{ 857 struct inpcb *inp; 858 859 inp = sotoinpcb(so); 860 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 861 862 INP_WLOCK(inp); 863 socantsendmore(so); 864 INP_WUNLOCK(inp); 865 return (0); 866} 867 868static int 869rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 870 struct mbuf *control, struct thread *td) 871{ 872 struct inpcb *inp; 873 struct sockaddr_in6 tmp; 874 struct sockaddr_in6 *dst; 875 int ret; 876 877 inp = sotoinpcb(so); 878 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 879 880 /* Always copy sockaddr to avoid overwrites. */ 881 /* Unlocked read. */ 882 if (so->so_state & SS_ISCONNECTED) { 883 if (nam) { 884 m_freem(m); 885 return (EISCONN); 886 } 887 /* XXX */ 888 bzero(&tmp, sizeof(tmp)); 889 tmp.sin6_family = AF_INET6; 890 tmp.sin6_len = sizeof(struct sockaddr_in6); 891 INP_RLOCK(inp); 892 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 893 sizeof(struct in6_addr)); 894 INP_RUNLOCK(inp); 895 dst = &tmp; 896 } else { 897 if (nam == NULL) { 898 m_freem(m); 899 return (ENOTCONN); 900 } 901 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 902 m_freem(m); 903 return (EINVAL); 904 } 905 tmp = *(struct sockaddr_in6 *)nam; 906 dst = &tmp; 907 908 if (dst->sin6_family == AF_UNSPEC) { 909 /* 910 * XXX: we allow this case for backward 911 * compatibility to buggy applications that 912 * rely on old (and wrong) kernel behavior. 913 */ 914 log(LOG_INFO, "rip6 SEND: address family is " 915 "unspec. Assume AF_INET6\n"); 916 dst->sin6_family = AF_INET6; 917 } else if (dst->sin6_family != AF_INET6) { 918 m_freem(m); 919 return(EAFNOSUPPORT); 920 } 921 } 922 ret = rip6_output(m, so, dst, control); 923 return (ret); 924} 925 926struct pr_usrreqs rip6_usrreqs = { 927 .pru_abort = rip6_abort, 928 .pru_attach = rip6_attach, 929 .pru_bind = rip6_bind, 930 .pru_connect = rip6_connect, 931 .pru_control = in6_control, 932 .pru_detach = rip6_detach, 933 .pru_disconnect = rip6_disconnect, 934 .pru_peeraddr = in6_getpeeraddr, 935 .pru_send = rip6_send, 936 .pru_shutdown = rip6_shutdown, 937 .pru_sockaddr = in6_getsockaddr, 938 .pru_close = rip6_close, 939}; 940