Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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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("$FreeBSD$"); 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 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 162 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 (m->m_pkthdr.len - (*offp + in6p->in6p_cksum) < 2 || 202 in6_cksum(m, proto, *offp, 203 m->m_pkthdr.len - *offp)) { 204 INP_RUNLOCK(in6p); 205 RIP6STAT_INC(rip6s_badsum); 206 continue; 207 } 208 } 209 /* 210 * If this raw socket has multicast state, and we 211 * have received a multicast, check if this socket 212 * should receive it, as multicast filtering is now 213 * the responsibility of the transport layer. 214 */ 215 if (in6p->in6p_moptions && 216 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 217 /* 218 * If the incoming datagram is for MLD, allow it 219 * through unconditionally to the raw socket. 220 * 221 * Use the M_RTALERT_MLD flag to check for MLD 222 * traffic without having to inspect the mbuf chain 223 * more deeply, as all MLDv1/v2 host messages MUST 224 * contain the Router Alert option. 225 * 226 * In the case of MLDv1, we may not have explicitly 227 * joined the group, and may have set IFF_ALLMULTI 228 * on the interface. im6o_mc_filter() may discard 229 * control traffic we actually need to see. 230 * 231 * Userland multicast routing daemons should continue 232 * filter the control traffic appropriately. 233 */ 234 int blocked; 235 236 blocked = MCAST_PASS; 237 if ((m->m_flags & M_RTALERT_MLD) == 0) { 238 struct sockaddr_in6 mcaddr; 239 240 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 241 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 242 mcaddr.sin6_family = AF_INET6; 243 mcaddr.sin6_addr = ip6->ip6_dst; 244 245 blocked = im6o_mc_filter(in6p->in6p_moptions, 246 ifp, 247 (struct sockaddr *)&mcaddr, 248 (struct sockaddr *)&fromsa); 249 } 250 if (blocked != MCAST_PASS) { 251 IP6STAT_INC(ip6s_notmember); 252 INP_RUNLOCK(in6p); 253 continue; 254 } 255 } 256 if (last != NULL) { 257 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 258 259 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 260 /* 261 * Check AH/ESP integrity. 262 */ 263 if (IPSEC_ENABLED(ipv6)) { 264 if (n != NULL && 265 IPSEC_CHECK_POLICY(ipv6, n, last) != 0) { 266 m_freem(n); 267 /* Do not inject data into pcb. */ 268 n = NULL; 269 } 270 } 271 #endif /* IPSEC */ 272 if (n) { 273 if (last->inp_flags & INP_CONTROLOPTS || 274 last->inp_socket->so_options & SO_TIMESTAMP) 275 ip6_savecontrol(last, n, &opts); 276 /* strip intermediate headers */ 277 m_adj(n, *offp); 278 if (sbappendaddr(&last->inp_socket->so_rcv, 279 (struct sockaddr *)&fromsa, 280 n, opts) == 0) { 281 m_freem(n); 282 if (opts) 283 m_freem(opts); 284 RIP6STAT_INC(rip6s_fullsock); 285 } else 286 sorwakeup(last->inp_socket); 287 opts = NULL; 288 } 289 INP_RUNLOCK(last); 290 } 291 last = in6p; 292 } 293 INP_INFO_RUNLOCK(&V_ripcbinfo); 294 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 295 /* 296 * Check AH/ESP integrity. 297 */ 298 if (IPSEC_ENABLED(ipv6) && last != NULL && 299 IPSEC_CHECK_POLICY(ipv6, m, last) != 0) { 300 m_freem(m); 301 IP6STAT_DEC(ip6s_delivered); 302 /* Do not inject data into pcb. */ 303 INP_RUNLOCK(last); 304 } else 305 #endif /* IPSEC */ 306 if (last != NULL) { 307 if (last->inp_flags & INP_CONTROLOPTS || 308 last->inp_socket->so_options & SO_TIMESTAMP) 309 ip6_savecontrol(last, m, &opts); 310 /* Strip intermediate headers. */ 311 m_adj(m, *offp); 312 if (sbappendaddr(&last->inp_socket->so_rcv, 313 (struct sockaddr *)&fromsa, m, opts) == 0) { 314 m_freem(m); 315 if (opts) 316 m_freem(opts); 317 RIP6STAT_INC(rip6s_fullsock); 318 } else 319 sorwakeup(last->inp_socket); 320 INP_RUNLOCK(last); 321 } else { 322 RIP6STAT_INC(rip6s_nosock); 323 if (m->m_flags & M_MCAST) 324 RIP6STAT_INC(rip6s_nosockmcast); 325 if (proto == IPPROTO_NONE) 326 m_freem(m); 327 else 328 icmp6_error(m, ICMP6_PARAM_PROB, 329 ICMP6_PARAMPROB_NEXTHEADER, 330 ip6_get_prevhdr(m, *offp)); 331 IP6STAT_DEC(ip6s_delivered); 332 } 333 return (IPPROTO_DONE); 334 } 335 336 void 337 rip6_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 */ 385 int 386 rip6_output(struct mbuf *m, struct socket *so, ...) 387 { 388 struct mbuf *control; 389 struct m_tag *mtag; 390 struct sockaddr_in6 *dstsock; 391 struct in6_addr *dst; 392 struct ip6_hdr *ip6; 393 struct inpcb *in6p; 394 u_int plen = m->m_pkthdr.len; 395 int error = 0; 396 struct ip6_pktopts opt, *optp; 397 struct ifnet *oifp = NULL; 398 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 399 int scope_ambiguous = 0; 400 int use_defzone = 0; 401 int hlim = 0; 402 struct in6_addr in6a; 403 va_list ap; 404 405 va_start(ap, so); 406 dstsock = va_arg(ap, struct sockaddr_in6 *); 407 control = va_arg(ap, struct mbuf *); 408 va_end(ap); 409 410 in6p = sotoinpcb(so); 411 INP_WLOCK(in6p); 412 413 dst = &dstsock->sin6_addr; 414 if (control != NULL) { 415 if ((error = ip6_setpktopts(control, &opt, 416 in6p->in6p_outputopts, so->so_cred, 417 so->so_proto->pr_protocol)) != 0) { 418 goto bad; 419 } 420 optp = &opt; 421 } else 422 optp = in6p->in6p_outputopts; 423 424 /* 425 * Check and convert scope zone ID into internal form. 426 * 427 * XXX: we may still need to determine the zone later. 428 */ 429 if (!(so->so_state & SS_ISCONNECTED)) { 430 if (!optp || !optp->ip6po_pktinfo || 431 !optp->ip6po_pktinfo->ipi6_ifindex) 432 use_defzone = V_ip6_use_defzone; 433 if (dstsock->sin6_scope_id == 0 && !use_defzone) 434 scope_ambiguous = 1; 435 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 436 goto bad; 437 } 438 439 /* 440 * For an ICMPv6 packet, we should know its type and code to update 441 * statistics. 442 */ 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 444 struct icmp6_hdr *icmp6; 445 if (m->m_len < sizeof(struct icmp6_hdr) && 446 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 447 error = ENOBUFS; 448 goto bad; 449 } 450 icmp6 = mtod(m, struct icmp6_hdr *); 451 type = icmp6->icmp6_type; 452 code = icmp6->icmp6_code; 453 } 454 455 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 456 if (m == NULL) { 457 error = ENOBUFS; 458 goto bad; 459 } 460 ip6 = mtod(m, struct ip6_hdr *); 461 462 /* 463 * Source address selection. 464 */ 465 error = in6_selectsrc_socket(dstsock, optp, in6p, so->so_cred, 466 scope_ambiguous, &in6a, &hlim); 467 468 if (error) 469 goto bad; 470 error = prison_check_ip6(in6p->inp_cred, &in6a); 471 if (error != 0) 472 goto bad; 473 ip6->ip6_src = in6a; 474 475 ip6->ip6_dst = dstsock->sin6_addr; 476 477 /* 478 * Fill in the rest of the IPv6 header fields. 479 */ 480 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 481 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 482 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 483 (IPV6_VERSION & IPV6_VERSION_MASK); 484 485 /* 486 * ip6_plen will be filled in ip6_output, so not fill it here. 487 */ 488 ip6->ip6_nxt = in6p->inp_ip_p; 489 ip6->ip6_hlim = hlim; 490 491 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 492 in6p->in6p_cksum != -1) { 493 struct mbuf *n; 494 int off; 495 u_int16_t *p; 496 497 /* Compute checksum. */ 498 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 499 off = offsetof(struct icmp6_hdr, icmp6_cksum); 500 else 501 off = in6p->in6p_cksum; 502 if (plen < off + 2) { 503 error = EINVAL; 504 goto bad; 505 } 506 off += sizeof(struct ip6_hdr); 507 508 n = m; 509 while (n && n->m_len <= off) { 510 off -= n->m_len; 511 n = n->m_next; 512 } 513 if (!n) 514 goto bad; 515 p = (u_int16_t *)(mtod(n, caddr_t) + off); 516 *p = 0; 517 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 518 } 519 520 /* 521 * Send RA/RS messages to user land for protection, before sending 522 * them to rtadvd/rtsol. 523 */ 524 if ((send_sendso_input_hook != NULL) && 525 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 526 switch (type) { 527 case ND_ROUTER_ADVERT: 528 case ND_ROUTER_SOLICIT: 529 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 530 sizeof(unsigned short), M_NOWAIT); 531 if (mtag == NULL) 532 goto bad; 533 m_tag_prepend(m, mtag); 534 } 535 } 536 537 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 538 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 539 if (oifp) 540 icmp6_ifoutstat_inc(oifp, type, code); 541 ICMP6STAT_INC(icp6s_outhist[type]); 542 } else 543 RIP6STAT_INC(rip6s_opackets); 544 545 goto freectl; 546 547 bad: 548 if (m) 549 m_freem(m); 550 551 freectl: 552 if (control != NULL) { 553 ip6_clearpktopts(&opt, -1); 554 m_freem(control); 555 } 556 INP_WUNLOCK(in6p); 557 return (error); 558 } 559 560 /* 561 * Raw IPv6 socket option processing. 562 */ 563 int 564 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 565 { 566 struct inpcb *inp; 567 int error; 568 569 if (sopt->sopt_level == IPPROTO_ICMPV6) 570 /* 571 * XXX: is it better to call icmp6_ctloutput() directly 572 * from protosw? 573 */ 574 return (icmp6_ctloutput(so, sopt)); 575 else if (sopt->sopt_level != IPPROTO_IPV6) { 576 if (sopt->sopt_level == SOL_SOCKET && 577 sopt->sopt_name == SO_SETFIB) { 578 inp = sotoinpcb(so); 579 INP_WLOCK(inp); 580 inp->inp_inc.inc_fibnum = so->so_fibnum; 581 INP_WUNLOCK(inp); 582 return (0); 583 } 584 return (EINVAL); 585 } 586 587 error = 0; 588 589 switch (sopt->sopt_dir) { 590 case SOPT_GET: 591 switch (sopt->sopt_name) { 592 case MRT6_INIT: 593 case MRT6_DONE: 594 case MRT6_ADD_MIF: 595 case MRT6_DEL_MIF: 596 case MRT6_ADD_MFC: 597 case MRT6_DEL_MFC: 598 case MRT6_PIM: 599 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 600 EOPNOTSUPP; 601 break; 602 case IPV6_CHECKSUM: 603 error = ip6_raw_ctloutput(so, sopt); 604 break; 605 default: 606 error = ip6_ctloutput(so, sopt); 607 break; 608 } 609 break; 610 611 case SOPT_SET: 612 switch (sopt->sopt_name) { 613 case MRT6_INIT: 614 case MRT6_DONE: 615 case MRT6_ADD_MIF: 616 case MRT6_DEL_MIF: 617 case MRT6_ADD_MFC: 618 case MRT6_DEL_MFC: 619 case MRT6_PIM: 620 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 621 EOPNOTSUPP; 622 break; 623 case IPV6_CHECKSUM: 624 error = ip6_raw_ctloutput(so, sopt); 625 break; 626 default: 627 error = ip6_ctloutput(so, sopt); 628 break; 629 } 630 break; 631 } 632 633 return (error); 634 } 635 636 static int 637 rip6_attach(struct socket *so, int proto, struct thread *td) 638 { 639 struct inpcb *inp; 640 struct icmp6_filter *filter; 641 int error; 642 643 inp = sotoinpcb(so); 644 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 645 646 error = priv_check(td, PRIV_NETINET_RAW); 647 if (error) 648 return (error); 649 error = soreserve(so, rip_sendspace, rip_recvspace); 650 if (error) 651 return (error); 652 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 653 if (filter == NULL) 654 return (ENOMEM); 655 INP_INFO_WLOCK(&V_ripcbinfo); 656 error = in_pcballoc(so, &V_ripcbinfo); 657 if (error) { 658 INP_INFO_WUNLOCK(&V_ripcbinfo); 659 free(filter, M_PCB); 660 return (error); 661 } 662 inp = (struct inpcb *)so->so_pcb; 663 INP_INFO_WUNLOCK(&V_ripcbinfo); 664 inp->inp_vflag |= INP_IPV6; 665 inp->inp_ip_p = (long)proto; 666 inp->in6p_hops = -1; /* use kernel default */ 667 inp->in6p_cksum = -1; 668 inp->in6p_icmp6filt = filter; 669 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 670 INP_WUNLOCK(inp); 671 return (0); 672 } 673 674 static void 675 rip6_detach(struct socket *so) 676 { 677 struct inpcb *inp; 678 679 inp = sotoinpcb(so); 680 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 681 682 if (so == V_ip6_mrouter && ip6_mrouter_done) 683 ip6_mrouter_done(); 684 /* xxx: RSVP */ 685 INP_INFO_WLOCK(&V_ripcbinfo); 686 INP_WLOCK(inp); 687 free(inp->in6p_icmp6filt, M_PCB); 688 in_pcbdetach(inp); 689 in_pcbfree(inp); 690 INP_INFO_WUNLOCK(&V_ripcbinfo); 691 } 692 693 /* XXXRW: This can't ever be called. */ 694 static void 695 rip6_abort(struct socket *so) 696 { 697 struct inpcb *inp; 698 699 inp = sotoinpcb(so); 700 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 701 702 soisdisconnected(so); 703 } 704 705 static void 706 rip6_close(struct socket *so) 707 { 708 struct inpcb *inp; 709 710 inp = sotoinpcb(so); 711 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 712 713 soisdisconnected(so); 714 } 715 716 static int 717 rip6_disconnect(struct socket *so) 718 { 719 struct inpcb *inp; 720 721 inp = sotoinpcb(so); 722 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 723 724 if ((so->so_state & SS_ISCONNECTED) == 0) 725 return (ENOTCONN); 726 inp->in6p_faddr = in6addr_any; 727 rip6_abort(so); 728 return (0); 729 } 730 731 static int 732 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 733 { 734 struct inpcb *inp; 735 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 736 struct ifaddr *ifa = NULL; 737 int error = 0; 738 739 inp = sotoinpcb(so); 740 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 741 742 if (nam->sa_len != sizeof(*addr)) 743 return (EINVAL); 744 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 745 return (error); 746 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 747 return (EADDRNOTAVAIL); 748 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 749 return (error); 750 751 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 752 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 753 return (EADDRNOTAVAIL); 754 if (ifa != NULL && 755 ((struct in6_ifaddr *)ifa)->ia6_flags & 756 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 757 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 758 ifa_free(ifa); 759 return (EADDRNOTAVAIL); 760 } 761 if (ifa != NULL) 762 ifa_free(ifa); 763 INP_INFO_WLOCK(&V_ripcbinfo); 764 INP_WLOCK(inp); 765 inp->in6p_laddr = addr->sin6_addr; 766 INP_WUNLOCK(inp); 767 INP_INFO_WUNLOCK(&V_ripcbinfo); 768 return (0); 769 } 770 771 static int 772 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 773 { 774 struct inpcb *inp; 775 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 776 struct in6_addr in6a; 777 int error = 0, scope_ambiguous = 0; 778 779 inp = sotoinpcb(so); 780 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 781 782 if (nam->sa_len != sizeof(*addr)) 783 return (EINVAL); 784 if (TAILQ_EMPTY(&V_ifnet)) 785 return (EADDRNOTAVAIL); 786 if (addr->sin6_family != AF_INET6) 787 return (EAFNOSUPPORT); 788 789 /* 790 * Application should provide a proper zone ID or the use of default 791 * zone IDs should be enabled. Unfortunately, some applications do 792 * not behave as it should, so we need a workaround. Even if an 793 * appropriate ID is not determined, we'll see if we can determine 794 * the outgoing interface. If we can, determine the zone ID based on 795 * the interface below. 796 */ 797 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 798 scope_ambiguous = 1; 799 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 800 return (error); 801 802 INP_INFO_WLOCK(&V_ripcbinfo); 803 INP_WLOCK(inp); 804 /* Source address selection. XXX: need pcblookup? */ 805 error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 806 inp, so->so_cred, scope_ambiguous, &in6a, NULL); 807 if (error) { 808 INP_WUNLOCK(inp); 809 INP_INFO_WUNLOCK(&V_ripcbinfo); 810 return (error); 811 } 812 813 inp->in6p_faddr = addr->sin6_addr; 814 inp->in6p_laddr = in6a; 815 soisconnected(so); 816 INP_WUNLOCK(inp); 817 INP_INFO_WUNLOCK(&V_ripcbinfo); 818 return (0); 819 } 820 821 static int 822 rip6_shutdown(struct socket *so) 823 { 824 struct inpcb *inp; 825 826 inp = sotoinpcb(so); 827 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 828 829 INP_WLOCK(inp); 830 socantsendmore(so); 831 INP_WUNLOCK(inp); 832 return (0); 833 } 834 835 static int 836 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 837 struct mbuf *control, struct thread *td) 838 { 839 struct inpcb *inp; 840 struct sockaddr_in6 tmp; 841 struct sockaddr_in6 *dst; 842 int ret; 843 844 inp = sotoinpcb(so); 845 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 846 847 /* Always copy sockaddr to avoid overwrites. */ 848 /* Unlocked read. */ 849 if (so->so_state & SS_ISCONNECTED) { 850 if (nam) { 851 m_freem(m); 852 return (EISCONN); 853 } 854 /* XXX */ 855 bzero(&tmp, sizeof(tmp)); 856 tmp.sin6_family = AF_INET6; 857 tmp.sin6_len = sizeof(struct sockaddr_in6); 858 INP_RLOCK(inp); 859 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 860 sizeof(struct in6_addr)); 861 INP_RUNLOCK(inp); 862 dst = &tmp; 863 } else { 864 if (nam == NULL) { 865 m_freem(m); 866 return (ENOTCONN); 867 } 868 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 869 m_freem(m); 870 return (EINVAL); 871 } 872 tmp = *(struct sockaddr_in6 *)nam; 873 dst = &tmp; 874 875 if (dst->sin6_family == AF_UNSPEC) { 876 /* 877 * XXX: we allow this case for backward 878 * compatibility to buggy applications that 879 * rely on old (and wrong) kernel behavior. 880 */ 881 log(LOG_INFO, "rip6 SEND: address family is " 882 "unspec. Assume AF_INET6\n"); 883 dst->sin6_family = AF_INET6; 884 } else if (dst->sin6_family != AF_INET6) { 885 m_freem(m); 886 return(EAFNOSUPPORT); 887 } 888 } 889 ret = rip6_output(m, so, dst, control); 890 return (ret); 891 } 892 893 struct pr_usrreqs rip6_usrreqs = { 894 .pru_abort = rip6_abort, 895 .pru_attach = rip6_attach, 896 .pru_bind = rip6_bind, 897 .pru_connect = rip6_connect, 898 .pru_control = in6_control, 899 .pru_detach = rip6_detach, 900 .pru_disconnect = rip6_disconnect, 901 .pru_peeraddr = in6_getpeeraddr, 902 .pru_send = rip6_send, 903 .pru_shutdown = rip6_shutdown, 904 .pru_sockaddr = in6_getsockaddr, 905 .pru_close = rip6_close, 906 };
Cache object: 635e507d47f7d7d4a693ea4186f0d2c0
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