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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/11.1/sys/netinet6/raw_ip6.c 315514 2017-03-18 22:04:20Z ae $"); 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 #include <netipsec/ipsec_support.h> 108 109 #include <machine/stdarg.h> 110 111 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 112 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 113 114 /* 115 * Raw interface to IP6 protocol. 116 */ 117 118 VNET_DECLARE(struct inpcbhead, ripcb); 119 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 120 #define V_ripcb VNET(ripcb) 121 #define V_ripcbinfo VNET(ripcbinfo) 122 123 extern u_long rip_sendspace; 124 extern u_long rip_recvspace; 125 126 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 127 VNET_PCPUSTAT_SYSINIT(rip6stat); 128 129 #ifdef VIMAGE 130 VNET_PCPUSTAT_SYSUNINIT(rip6stat); 131 #endif /* VIMAGE */ 132 133 /* 134 * Hooks for multicast routing. They all default to NULL, so leave them not 135 * initialized and rely on BSS being set to 0. 136 */ 137 138 /* 139 * The socket used to communicate with the multicast routing daemon. 140 */ 141 VNET_DEFINE(struct socket *, ip6_mrouter); 142 143 /* 144 * The various mrouter functions. 145 */ 146 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 147 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 148 int (*ip6_mrouter_done)(void); 149 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 150 int (*mrt6_ioctl)(u_long, caddr_t); 151 152 /* 153 * Setup generic address and protocol structures for raw_input routine, then 154 * pass them along with mbuf chain. 155 */ 156 int 157 rip6_input(struct mbuf **mp, int *offp, int proto) 158 { 159 struct ifnet *ifp; 160 struct mbuf *m = *mp; 161 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 162 register struct inpcb *in6p; 163 struct inpcb *last = NULL; 164 struct mbuf *opts = NULL; 165 struct sockaddr_in6 fromsa; 166 167 RIP6STAT_INC(rip6s_ipackets); 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 INP_RLOCK(in6p); 199 if (in6p->in6p_cksum != -1) { 200 RIP6STAT_INC(rip6s_isum); 201 if (in6_cksum(m, proto, *offp, 202 m->m_pkthdr.len - *offp)) { 203 INP_RUNLOCK(in6p); 204 RIP6STAT_INC(rip6s_badsum); 205 continue; 206 } 207 } 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 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 259 /* 260 * Check AH/ESP integrity. 261 */ 262 if (IPSEC_ENABLED(ipv6)) { 263 if (n != NULL && 264 IPSEC_CHECK_POLICY(ipv6, n, last) != 0) { 265 m_freem(n); 266 /* Do not inject data into pcb. */ 267 n = NULL; 268 } 269 } 270 #endif /* IPSEC */ 271 if (n) { 272 if (last->inp_flags & INP_CONTROLOPTS || 273 last->inp_socket->so_options & SO_TIMESTAMP) 274 ip6_savecontrol(last, n, &opts); 275 /* strip intermediate headers */ 276 m_adj(n, *offp); 277 if (sbappendaddr(&last->inp_socket->so_rcv, 278 (struct sockaddr *)&fromsa, 279 n, opts) == 0) { 280 m_freem(n); 281 if (opts) 282 m_freem(opts); 283 RIP6STAT_INC(rip6s_fullsock); 284 } else 285 sorwakeup(last->inp_socket); 286 opts = NULL; 287 } 288 INP_RUNLOCK(last); 289 } 290 last = in6p; 291 } 292 INP_INFO_RUNLOCK(&V_ripcbinfo); 293 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 294 /* 295 * Check AH/ESP integrity. 296 */ 297 if (IPSEC_ENABLED(ipv6) && last != NULL && 298 IPSEC_CHECK_POLICY(ipv6, m, last) != 0) { 299 m_freem(m); 300 IP6STAT_DEC(ip6s_delivered); 301 /* Do not inject data into pcb. */ 302 INP_RUNLOCK(last); 303 } else 304 #endif /* IPSEC */ 305 if (last != NULL) { 306 if (last->inp_flags & INP_CONTROLOPTS || 307 last->inp_socket->so_options & SO_TIMESTAMP) 308 ip6_savecontrol(last, m, &opts); 309 /* Strip intermediate headers. */ 310 m_adj(m, *offp); 311 if (sbappendaddr(&last->inp_socket->so_rcv, 312 (struct sockaddr *)&fromsa, m, opts) == 0) { 313 m_freem(m); 314 if (opts) 315 m_freem(opts); 316 RIP6STAT_INC(rip6s_fullsock); 317 } else 318 sorwakeup(last->inp_socket); 319 INP_RUNLOCK(last); 320 } else { 321 RIP6STAT_INC(rip6s_nosock); 322 if (m->m_flags & M_MCAST) 323 RIP6STAT_INC(rip6s_nosockmcast); 324 if (proto == IPPROTO_NONE) 325 m_freem(m); 326 else { 327 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 328 icmp6_error(m, ICMP6_PARAM_PROB, 329 ICMP6_PARAMPROB_NEXTHEADER, 330 prvnxtp - mtod(m, char *)); 331 } 332 IP6STAT_DEC(ip6s_delivered); 333 } 334 return (IPPROTO_DONE); 335 } 336 337 void 338 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 339 { 340 struct ip6_hdr *ip6; 341 struct mbuf *m; 342 int off = 0; 343 struct ip6ctlparam *ip6cp = NULL; 344 const struct sockaddr_in6 *sa6_src = NULL; 345 void *cmdarg; 346 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 347 348 if (sa->sa_family != AF_INET6 || 349 sa->sa_len != sizeof(struct sockaddr_in6)) 350 return; 351 352 if ((unsigned)cmd >= PRC_NCMDS) 353 return; 354 if (PRC_IS_REDIRECT(cmd)) 355 notify = in6_rtchange, d = NULL; 356 else if (cmd == PRC_HOSTDEAD) 357 d = NULL; 358 else if (inet6ctlerrmap[cmd] == 0) 359 return; 360 361 /* 362 * If the parameter is from icmp6, decode it. 363 */ 364 if (d != NULL) { 365 ip6cp = (struct ip6ctlparam *)d; 366 m = ip6cp->ip6c_m; 367 ip6 = ip6cp->ip6c_ip6; 368 off = ip6cp->ip6c_off; 369 cmdarg = ip6cp->ip6c_cmdarg; 370 sa6_src = ip6cp->ip6c_src; 371 } else { 372 m = NULL; 373 ip6 = NULL; 374 cmdarg = NULL; 375 sa6_src = &sa6_any; 376 } 377 378 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 379 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 380 } 381 382 /* 383 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 384 * may have setup with control call. 385 */ 386 int 387 rip6_output(struct mbuf *m, struct socket *so, ...) 388 { 389 struct mbuf *control; 390 struct m_tag *mtag; 391 struct sockaddr_in6 *dstsock; 392 struct in6_addr *dst; 393 struct ip6_hdr *ip6; 394 struct inpcb *in6p; 395 u_int plen = m->m_pkthdr.len; 396 int error = 0; 397 struct ip6_pktopts opt, *optp; 398 struct ifnet *oifp = NULL; 399 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 400 int scope_ambiguous = 0; 401 int use_defzone = 0; 402 int hlim = 0; 403 struct in6_addr in6a; 404 va_list ap; 405 406 va_start(ap, so); 407 dstsock = va_arg(ap, struct sockaddr_in6 *); 408 control = va_arg(ap, struct mbuf *); 409 va_end(ap); 410 411 in6p = sotoinpcb(so); 412 INP_WLOCK(in6p); 413 414 dst = &dstsock->sin6_addr; 415 if (control != NULL) { 416 if ((error = ip6_setpktopts(control, &opt, 417 in6p->in6p_outputopts, so->so_cred, 418 so->so_proto->pr_protocol)) != 0) { 419 goto bad; 420 } 421 optp = &opt; 422 } else 423 optp = in6p->in6p_outputopts; 424 425 /* 426 * Check and convert scope zone ID into internal form. 427 * 428 * XXX: we may still need to determine the zone later. 429 */ 430 if (!(so->so_state & SS_ISCONNECTED)) { 431 if (!optp || !optp->ip6po_pktinfo || 432 !optp->ip6po_pktinfo->ipi6_ifindex) 433 use_defzone = V_ip6_use_defzone; 434 if (dstsock->sin6_scope_id == 0 && !use_defzone) 435 scope_ambiguous = 1; 436 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 437 goto bad; 438 } 439 440 /* 441 * For an ICMPv6 packet, we should know its type and code to update 442 * statistics. 443 */ 444 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 445 struct icmp6_hdr *icmp6; 446 if (m->m_len < sizeof(struct icmp6_hdr) && 447 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 448 error = ENOBUFS; 449 goto bad; 450 } 451 icmp6 = mtod(m, struct icmp6_hdr *); 452 type = icmp6->icmp6_type; 453 code = icmp6->icmp6_code; 454 } 455 456 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 457 if (m == NULL) { 458 error = ENOBUFS; 459 goto bad; 460 } 461 ip6 = mtod(m, struct ip6_hdr *); 462 463 /* 464 * Source address selection. 465 */ 466 error = in6_selectsrc_socket(dstsock, optp, in6p, so->so_cred, 467 scope_ambiguous, &in6a, &hlim); 468 469 if (error) 470 goto bad; 471 error = prison_check_ip6(in6p->inp_cred, &in6a); 472 if (error != 0) 473 goto bad; 474 ip6->ip6_src = in6a; 475 476 ip6->ip6_dst = dstsock->sin6_addr; 477 478 /* 479 * Fill in the rest of the IPv6 header fields. 480 */ 481 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 482 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 483 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 484 (IPV6_VERSION & IPV6_VERSION_MASK); 485 486 /* 487 * ip6_plen will be filled in ip6_output, so not fill it here. 488 */ 489 ip6->ip6_nxt = in6p->inp_ip_p; 490 ip6->ip6_hlim = hlim; 491 492 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 493 in6p->in6p_cksum != -1) { 494 struct mbuf *n; 495 int off; 496 u_int16_t *p; 497 498 /* Compute checksum. */ 499 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 500 off = offsetof(struct icmp6_hdr, icmp6_cksum); 501 else 502 off = in6p->in6p_cksum; 503 if (plen < off + 1) { 504 error = EINVAL; 505 goto bad; 506 } 507 off += sizeof(struct ip6_hdr); 508 509 n = m; 510 while (n && n->m_len <= off) { 511 off -= n->m_len; 512 n = n->m_next; 513 } 514 if (!n) 515 goto bad; 516 p = (u_int16_t *)(mtod(n, caddr_t) + off); 517 *p = 0; 518 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 519 } 520 521 /* 522 * Send RA/RS messages to user land for protection, before sending 523 * them to rtadvd/rtsol. 524 */ 525 if ((send_sendso_input_hook != NULL) && 526 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 527 switch (type) { 528 case ND_ROUTER_ADVERT: 529 case ND_ROUTER_SOLICIT: 530 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 531 sizeof(unsigned short), M_NOWAIT); 532 if (mtag == NULL) 533 goto bad; 534 m_tag_prepend(m, mtag); 535 } 536 } 537 538 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 539 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 540 if (oifp) 541 icmp6_ifoutstat_inc(oifp, type, code); 542 ICMP6STAT_INC(icp6s_outhist[type]); 543 } else 544 RIP6STAT_INC(rip6s_opackets); 545 546 goto freectl; 547 548 bad: 549 if (m) 550 m_freem(m); 551 552 freectl: 553 if (control != NULL) { 554 ip6_clearpktopts(&opt, -1); 555 m_freem(control); 556 } 557 INP_WUNLOCK(in6p); 558 return (error); 559 } 560 561 /* 562 * Raw IPv6 socket option processing. 563 */ 564 int 565 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 566 { 567 struct inpcb *inp; 568 int error; 569 570 if (sopt->sopt_level == IPPROTO_ICMPV6) 571 /* 572 * XXX: is it better to call icmp6_ctloutput() directly 573 * from protosw? 574 */ 575 return (icmp6_ctloutput(so, sopt)); 576 else if (sopt->sopt_level != IPPROTO_IPV6) { 577 if (sopt->sopt_level == SOL_SOCKET && 578 sopt->sopt_name == SO_SETFIB) { 579 inp = sotoinpcb(so); 580 INP_WLOCK(inp); 581 inp->inp_inc.inc_fibnum = so->so_fibnum; 582 INP_WUNLOCK(inp); 583 return (0); 584 } 585 return (EINVAL); 586 } 587 588 error = 0; 589 590 switch (sopt->sopt_dir) { 591 case SOPT_GET: 592 switch (sopt->sopt_name) { 593 case MRT6_INIT: 594 case MRT6_DONE: 595 case MRT6_ADD_MIF: 596 case MRT6_DEL_MIF: 597 case MRT6_ADD_MFC: 598 case MRT6_DEL_MFC: 599 case MRT6_PIM: 600 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 601 EOPNOTSUPP; 602 break; 603 case IPV6_CHECKSUM: 604 error = ip6_raw_ctloutput(so, sopt); 605 break; 606 default: 607 error = ip6_ctloutput(so, sopt); 608 break; 609 } 610 break; 611 612 case SOPT_SET: 613 switch (sopt->sopt_name) { 614 case MRT6_INIT: 615 case MRT6_DONE: 616 case MRT6_ADD_MIF: 617 case MRT6_DEL_MIF: 618 case MRT6_ADD_MFC: 619 case MRT6_DEL_MFC: 620 case MRT6_PIM: 621 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 622 EOPNOTSUPP; 623 break; 624 case IPV6_CHECKSUM: 625 error = ip6_raw_ctloutput(so, sopt); 626 break; 627 default: 628 error = ip6_ctloutput(so, sopt); 629 break; 630 } 631 break; 632 } 633 634 return (error); 635 } 636 637 static int 638 rip6_attach(struct socket *so, int proto, struct thread *td) 639 { 640 struct inpcb *inp; 641 struct icmp6_filter *filter; 642 int error; 643 644 inp = sotoinpcb(so); 645 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 646 647 error = priv_check(td, PRIV_NETINET_RAW); 648 if (error) 649 return (error); 650 error = soreserve(so, rip_sendspace, rip_recvspace); 651 if (error) 652 return (error); 653 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 654 if (filter == NULL) 655 return (ENOMEM); 656 INP_INFO_WLOCK(&V_ripcbinfo); 657 error = in_pcballoc(so, &V_ripcbinfo); 658 if (error) { 659 INP_INFO_WUNLOCK(&V_ripcbinfo); 660 free(filter, M_PCB); 661 return (error); 662 } 663 inp = (struct inpcb *)so->so_pcb; 664 INP_INFO_WUNLOCK(&V_ripcbinfo); 665 inp->inp_vflag |= INP_IPV6; 666 inp->inp_ip_p = (long)proto; 667 inp->in6p_hops = -1; /* use kernel default */ 668 inp->in6p_cksum = -1; 669 inp->in6p_icmp6filt = filter; 670 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 671 INP_WUNLOCK(inp); 672 return (0); 673 } 674 675 static void 676 rip6_detach(struct socket *so) 677 { 678 struct inpcb *inp; 679 680 inp = sotoinpcb(so); 681 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 682 683 if (so == V_ip6_mrouter && ip6_mrouter_done) 684 ip6_mrouter_done(); 685 /* xxx: RSVP */ 686 INP_INFO_WLOCK(&V_ripcbinfo); 687 INP_WLOCK(inp); 688 free(inp->in6p_icmp6filt, M_PCB); 689 in_pcbdetach(inp); 690 in_pcbfree(inp); 691 INP_INFO_WUNLOCK(&V_ripcbinfo); 692 } 693 694 /* XXXRW: This can't ever be called. */ 695 static void 696 rip6_abort(struct socket *so) 697 { 698 struct inpcb *inp; 699 700 inp = sotoinpcb(so); 701 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 702 703 soisdisconnected(so); 704 } 705 706 static void 707 rip6_close(struct socket *so) 708 { 709 struct inpcb *inp; 710 711 inp = sotoinpcb(so); 712 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 713 714 soisdisconnected(so); 715 } 716 717 static int 718 rip6_disconnect(struct socket *so) 719 { 720 struct inpcb *inp; 721 722 inp = sotoinpcb(so); 723 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 724 725 if ((so->so_state & SS_ISCONNECTED) == 0) 726 return (ENOTCONN); 727 inp->in6p_faddr = in6addr_any; 728 rip6_abort(so); 729 return (0); 730 } 731 732 static int 733 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 734 { 735 struct inpcb *inp; 736 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 737 struct ifaddr *ifa = NULL; 738 int error = 0; 739 740 inp = sotoinpcb(so); 741 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 742 743 if (nam->sa_len != sizeof(*addr)) 744 return (EINVAL); 745 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 746 return (error); 747 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 748 return (EADDRNOTAVAIL); 749 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 750 return (error); 751 752 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 753 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 754 return (EADDRNOTAVAIL); 755 if (ifa != NULL && 756 ((struct in6_ifaddr *)ifa)->ia6_flags & 757 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 758 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 759 ifa_free(ifa); 760 return (EADDRNOTAVAIL); 761 } 762 if (ifa != NULL) 763 ifa_free(ifa); 764 INP_INFO_WLOCK(&V_ripcbinfo); 765 INP_WLOCK(inp); 766 inp->in6p_laddr = addr->sin6_addr; 767 INP_WUNLOCK(inp); 768 INP_INFO_WUNLOCK(&V_ripcbinfo); 769 return (0); 770 } 771 772 static int 773 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 774 { 775 struct inpcb *inp; 776 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 777 struct in6_addr in6a; 778 int error = 0, scope_ambiguous = 0; 779 780 inp = sotoinpcb(so); 781 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 782 783 if (nam->sa_len != sizeof(*addr)) 784 return (EINVAL); 785 if (TAILQ_EMPTY(&V_ifnet)) 786 return (EADDRNOTAVAIL); 787 if (addr->sin6_family != AF_INET6) 788 return (EAFNOSUPPORT); 789 790 /* 791 * Application should provide a proper zone ID or the use of default 792 * zone IDs should be enabled. Unfortunately, some applications do 793 * not behave as it should, so we need a workaround. Even if an 794 * appropriate ID is not determined, we'll see if we can determine 795 * the outgoing interface. If we can, determine the zone ID based on 796 * the interface below. 797 */ 798 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 799 scope_ambiguous = 1; 800 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 801 return (error); 802 803 INP_INFO_WLOCK(&V_ripcbinfo); 804 INP_WLOCK(inp); 805 /* Source address selection. XXX: need pcblookup? */ 806 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 807 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 808 if (error) { 809 INP_WUNLOCK(inp); 810 INP_INFO_WUNLOCK(&V_ripcbinfo); 811 return (error); 812 } 813 814 inp->in6p_faddr = addr->sin6_addr; 815 inp->in6p_laddr = in6a; 816 soisconnected(so); 817 INP_WUNLOCK(inp); 818 INP_INFO_WUNLOCK(&V_ripcbinfo); 819 return (0); 820 } 821 822 static int 823 rip6_shutdown(struct socket *so) 824 { 825 struct inpcb *inp; 826 827 inp = sotoinpcb(so); 828 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 829 830 INP_WLOCK(inp); 831 socantsendmore(so); 832 INP_WUNLOCK(inp); 833 return (0); 834 } 835 836 static int 837 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 838 struct mbuf *control, struct thread *td) 839 { 840 struct inpcb *inp; 841 struct sockaddr_in6 tmp; 842 struct sockaddr_in6 *dst; 843 int ret; 844 845 inp = sotoinpcb(so); 846 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 847 848 /* Always copy sockaddr to avoid overwrites. */ 849 /* Unlocked read. */ 850 if (so->so_state & SS_ISCONNECTED) { 851 if (nam) { 852 m_freem(m); 853 return (EISCONN); 854 } 855 /* XXX */ 856 bzero(&tmp, sizeof(tmp)); 857 tmp.sin6_family = AF_INET6; 858 tmp.sin6_len = sizeof(struct sockaddr_in6); 859 INP_RLOCK(inp); 860 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 861 sizeof(struct in6_addr)); 862 INP_RUNLOCK(inp); 863 dst = &tmp; 864 } else { 865 if (nam == NULL) { 866 m_freem(m); 867 return (ENOTCONN); 868 } 869 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 870 m_freem(m); 871 return (EINVAL); 872 } 873 tmp = *(struct sockaddr_in6 *)nam; 874 dst = &tmp; 875 876 if (dst->sin6_family == AF_UNSPEC) { 877 /* 878 * XXX: we allow this case for backward 879 * compatibility to buggy applications that 880 * rely on old (and wrong) kernel behavior. 881 */ 882 log(LOG_INFO, "rip6 SEND: address family is " 883 "unspec. Assume AF_INET6\n"); 884 dst->sin6_family = AF_INET6; 885 } else if (dst->sin6_family != AF_INET6) { 886 m_freem(m); 887 return(EAFNOSUPPORT); 888 } 889 } 890 ret = rip6_output(m, so, dst, control); 891 return (ret); 892 } 893 894 struct pr_usrreqs rip6_usrreqs = { 895 .pru_abort = rip6_abort, 896 .pru_attach = rip6_attach, 897 .pru_bind = rip6_bind, 898 .pru_connect = rip6_connect, 899 .pru_control = in6_control, 900 .pru_detach = rip6_detach, 901 .pru_disconnect = rip6_disconnect, 902 .pru_peeraddr = in6_getpeeraddr, 903 .pru_send = rip6_send, 904 .pru_shutdown = rip6_shutdown, 905 .pru_sockaddr = in6_getsockaddr, 906 .pru_close = rip6_close, 907 };
Cache object: 9a8730b0bcdf8021dcb29a31ee86c46c
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