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_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 */ 119 120 VNET_DECLARE(struct inpcbhead, ripcb); 121 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 122 #define V_ripcb VNET(ripcb) 123 #define V_ripcbinfo VNET(ripcbinfo) 124 125 extern u_long rip_sendspace; 126 extern u_long rip_recvspace; 127 128 VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 129 VNET_PCPUSTAT_SYSINIT(rip6stat); 130 131 #ifdef VIMAGE 132 VNET_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 */ 143 VNET_DEFINE(struct socket *, ip6_mrouter); 144 145 /* 146 * The various mrouter functions. 147 */ 148 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 149 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 150 int (*ip6_mrouter_done)(void); 151 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 152 int (*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 */ 158 int 159 rip6_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 icmp6_error(m, ICMP6_PARAM_PROB, 333 ICMP6_PARAMPROB_NEXTHEADER, 334 ip6_get_prevhdr(m, *offp)); 335 IP6STAT_DEC(ip6s_delivered); 336 } 337 return (IPPROTO_DONE); 338 } 339 340 void 341 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 342 { 343 struct ip6_hdr *ip6; 344 struct mbuf *m; 345 int off = 0; 346 struct ip6ctlparam *ip6cp = NULL; 347 const struct sockaddr_in6 *sa6_src = NULL; 348 void *cmdarg; 349 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 350 351 if (sa->sa_family != AF_INET6 || 352 sa->sa_len != sizeof(struct sockaddr_in6)) 353 return; 354 355 if ((unsigned)cmd >= PRC_NCMDS) 356 return; 357 if (PRC_IS_REDIRECT(cmd)) 358 notify = in6_rtchange, d = NULL; 359 else if (cmd == PRC_HOSTDEAD) 360 d = NULL; 361 else if (inet6ctlerrmap[cmd] == 0) 362 return; 363 364 /* 365 * If the parameter is from icmp6, decode it. 366 */ 367 if (d != NULL) { 368 ip6cp = (struct ip6ctlparam *)d; 369 m = ip6cp->ip6c_m; 370 ip6 = ip6cp->ip6c_ip6; 371 off = ip6cp->ip6c_off; 372 cmdarg = ip6cp->ip6c_cmdarg; 373 sa6_src = ip6cp->ip6c_src; 374 } else { 375 m = NULL; 376 ip6 = NULL; 377 cmdarg = NULL; 378 sa6_src = &sa6_any; 379 } 380 381 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 382 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 383 } 384 385 /* 386 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 387 * may have setup with control call. 388 */ 389 int 390 #if __STDC__ 391 rip6_output(struct mbuf *m, ...) 392 #else 393 rip6_output(m, va_alist) 394 struct mbuf *m; 395 va_dcl 396 #endif 397 { 398 struct mbuf *control; 399 struct m_tag *mtag; 400 struct socket *so; 401 struct sockaddr_in6 *dstsock; 402 struct in6_addr *dst; 403 struct ip6_hdr *ip6; 404 struct inpcb *in6p; 405 u_int plen = m->m_pkthdr.len; 406 int error = 0; 407 struct ip6_pktopts opt, *optp; 408 struct ifnet *oifp = NULL; 409 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 410 int scope_ambiguous = 0; 411 int use_defzone = 0; 412 struct in6_addr in6a; 413 va_list ap; 414 415 va_start(ap, m); 416 so = va_arg(ap, struct socket *); 417 dstsock = va_arg(ap, struct sockaddr_in6 *); 418 control = va_arg(ap, struct mbuf *); 419 va_end(ap); 420 421 in6p = sotoinpcb(so); 422 INP_WLOCK(in6p); 423 424 dst = &dstsock->sin6_addr; 425 if (control != NULL) { 426 if ((error = ip6_setpktopts(control, &opt, 427 in6p->in6p_outputopts, so->so_cred, 428 so->so_proto->pr_protocol)) != 0) { 429 goto bad; 430 } 431 optp = &opt; 432 } else 433 optp = in6p->in6p_outputopts; 434 435 /* 436 * Check and convert scope zone ID into internal form. 437 * 438 * XXX: we may still need to determine the zone later. 439 */ 440 if (!(so->so_state & SS_ISCONNECTED)) { 441 if (!optp || !optp->ip6po_pktinfo || 442 !optp->ip6po_pktinfo->ipi6_ifindex) 443 use_defzone = V_ip6_use_defzone; 444 if (dstsock->sin6_scope_id == 0 && !use_defzone) 445 scope_ambiguous = 1; 446 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 447 goto bad; 448 } 449 450 /* 451 * For an ICMPv6 packet, we should know its type and code to update 452 * statistics. 453 */ 454 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 455 struct icmp6_hdr *icmp6; 456 if (m->m_len < sizeof(struct icmp6_hdr) && 457 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 458 error = ENOBUFS; 459 goto bad; 460 } 461 icmp6 = mtod(m, struct icmp6_hdr *); 462 type = icmp6->icmp6_type; 463 code = icmp6->icmp6_code; 464 } 465 466 M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 467 if (m == NULL) { 468 error = ENOBUFS; 469 goto bad; 470 } 471 ip6 = mtod(m, struct ip6_hdr *); 472 473 /* 474 * Source address selection. 475 */ 476 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 477 &oifp, &in6a); 478 if (error) 479 goto bad; 480 error = prison_check_ip6(in6p->inp_cred, &in6a); 481 if (error != 0) 482 goto bad; 483 ip6->ip6_src = in6a; 484 485 if (oifp && scope_ambiguous) { 486 /* 487 * Application should provide a proper zone ID or the use of 488 * default zone IDs should be enabled. Unfortunately, some 489 * applications do not behave as it should, so we need a 490 * workaround. Even if an appropriate ID is not determined 491 * (when it's required), if we can determine the outgoing 492 * interface. determine the zone ID based on the interface. 493 */ 494 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 495 if (error != 0) 496 goto bad; 497 } 498 ip6->ip6_dst = dstsock->sin6_addr; 499 500 /* 501 * Fill in the rest of the IPv6 header fields. 502 */ 503 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 504 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 505 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 506 (IPV6_VERSION & IPV6_VERSION_MASK); 507 508 /* 509 * ip6_plen will be filled in ip6_output, so not fill it here. 510 */ 511 ip6->ip6_nxt = in6p->inp_ip_p; 512 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 513 514 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 515 in6p->in6p_cksum != -1) { 516 struct mbuf *n; 517 int off; 518 u_int16_t *p; 519 520 /* Compute checksum. */ 521 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 522 off = offsetof(struct icmp6_hdr, icmp6_cksum); 523 else 524 off = in6p->in6p_cksum; 525 if (plen < off + 1) { 526 error = EINVAL; 527 goto bad; 528 } 529 off += sizeof(struct ip6_hdr); 530 531 n = m; 532 while (n && n->m_len <= off) { 533 off -= n->m_len; 534 n = n->m_next; 535 } 536 if (!n) 537 goto bad; 538 p = (u_int16_t *)(mtod(n, caddr_t) + off); 539 *p = 0; 540 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 541 } 542 543 /* 544 * Send RA/RS messages to user land for protection, before sending 545 * them to rtadvd/rtsol. 546 */ 547 if ((send_sendso_input_hook != NULL) && 548 so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 549 switch (type) { 550 case ND_ROUTER_ADVERT: 551 case ND_ROUTER_SOLICIT: 552 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 553 sizeof(unsigned short), M_NOWAIT); 554 if (mtag == NULL) 555 goto bad; 556 m_tag_prepend(m, mtag); 557 } 558 } 559 560 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 561 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 562 if (oifp) 563 icmp6_ifoutstat_inc(oifp, type, code); 564 ICMP6STAT_INC(icp6s_outhist[type]); 565 } else 566 RIP6STAT_INC(rip6s_opackets); 567 568 goto freectl; 569 570 bad: 571 if (m) 572 m_freem(m); 573 574 freectl: 575 if (control != NULL) { 576 ip6_clearpktopts(&opt, -1); 577 m_freem(control); 578 } 579 INP_WUNLOCK(in6p); 580 return (error); 581 } 582 583 /* 584 * Raw IPv6 socket option processing. 585 */ 586 int 587 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 588 { 589 struct inpcb *inp; 590 int error; 591 592 if (sopt->sopt_level == IPPROTO_ICMPV6) 593 /* 594 * XXX: is it better to call icmp6_ctloutput() directly 595 * from protosw? 596 */ 597 return (icmp6_ctloutput(so, sopt)); 598 else if (sopt->sopt_level != IPPROTO_IPV6) { 599 if (sopt->sopt_level == SOL_SOCKET && 600 sopt->sopt_name == SO_SETFIB) { 601 inp = sotoinpcb(so); 602 INP_WLOCK(inp); 603 inp->inp_inc.inc_fibnum = so->so_fibnum; 604 INP_WUNLOCK(inp); 605 return (0); 606 } 607 return (EINVAL); 608 } 609 610 error = 0; 611 612 switch (sopt->sopt_dir) { 613 case SOPT_GET: 614 switch (sopt->sopt_name) { 615 case MRT6_INIT: 616 case MRT6_DONE: 617 case MRT6_ADD_MIF: 618 case MRT6_DEL_MIF: 619 case MRT6_ADD_MFC: 620 case MRT6_DEL_MFC: 621 case MRT6_PIM: 622 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 623 EOPNOTSUPP; 624 break; 625 case IPV6_CHECKSUM: 626 error = ip6_raw_ctloutput(so, sopt); 627 break; 628 default: 629 error = ip6_ctloutput(so, sopt); 630 break; 631 } 632 break; 633 634 case SOPT_SET: 635 switch (sopt->sopt_name) { 636 case MRT6_INIT: 637 case MRT6_DONE: 638 case MRT6_ADD_MIF: 639 case MRT6_DEL_MIF: 640 case MRT6_ADD_MFC: 641 case MRT6_DEL_MFC: 642 case MRT6_PIM: 643 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 644 EOPNOTSUPP; 645 break; 646 case IPV6_CHECKSUM: 647 error = ip6_raw_ctloutput(so, sopt); 648 break; 649 default: 650 error = ip6_ctloutput(so, sopt); 651 break; 652 } 653 break; 654 } 655 656 return (error); 657 } 658 659 static int 660 rip6_attach(struct socket *so, int proto, struct thread *td) 661 { 662 struct inpcb *inp; 663 struct icmp6_filter *filter; 664 int error; 665 666 inp = sotoinpcb(so); 667 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 668 669 error = priv_check(td, PRIV_NETINET_RAW); 670 if (error) 671 return (error); 672 error = soreserve(so, rip_sendspace, rip_recvspace); 673 if (error) 674 return (error); 675 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 676 if (filter == NULL) 677 return (ENOMEM); 678 INP_INFO_WLOCK(&V_ripcbinfo); 679 error = in_pcballoc(so, &V_ripcbinfo); 680 if (error) { 681 INP_INFO_WUNLOCK(&V_ripcbinfo); 682 free(filter, M_PCB); 683 return (error); 684 } 685 inp = (struct inpcb *)so->so_pcb; 686 INP_INFO_WUNLOCK(&V_ripcbinfo); 687 inp->inp_vflag |= INP_IPV6; 688 inp->inp_ip_p = (long)proto; 689 inp->in6p_hops = -1; /* use kernel default */ 690 inp->in6p_cksum = -1; 691 inp->in6p_icmp6filt = filter; 692 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 693 INP_WUNLOCK(inp); 694 return (0); 695 } 696 697 static void 698 rip6_detach(struct socket *so) 699 { 700 struct inpcb *inp; 701 702 inp = sotoinpcb(so); 703 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 704 705 if (so == V_ip6_mrouter && ip6_mrouter_done) 706 ip6_mrouter_done(); 707 /* xxx: RSVP */ 708 INP_INFO_WLOCK(&V_ripcbinfo); 709 INP_WLOCK(inp); 710 free(inp->in6p_icmp6filt, M_PCB); 711 in_pcbdetach(inp); 712 in_pcbfree(inp); 713 INP_INFO_WUNLOCK(&V_ripcbinfo); 714 } 715 716 /* XXXRW: This can't ever be called. */ 717 static void 718 rip6_abort(struct socket *so) 719 { 720 struct inpcb *inp; 721 722 inp = sotoinpcb(so); 723 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 724 725 soisdisconnected(so); 726 } 727 728 static void 729 rip6_close(struct socket *so) 730 { 731 struct inpcb *inp; 732 733 inp = sotoinpcb(so); 734 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 735 736 soisdisconnected(so); 737 } 738 739 static int 740 rip6_disconnect(struct socket *so) 741 { 742 struct inpcb *inp; 743 744 inp = sotoinpcb(so); 745 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 746 747 if ((so->so_state & SS_ISCONNECTED) == 0) 748 return (ENOTCONN); 749 inp->in6p_faddr = in6addr_any; 750 rip6_abort(so); 751 return (0); 752 } 753 754 static int 755 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 756 { 757 struct inpcb *inp; 758 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 759 struct ifaddr *ifa = NULL; 760 int error = 0; 761 762 inp = sotoinpcb(so); 763 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 764 765 if (nam->sa_len != sizeof(*addr)) 766 return (EINVAL); 767 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 768 return (error); 769 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 770 return (EADDRNOTAVAIL); 771 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 772 return (error); 773 774 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 775 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 776 return (EADDRNOTAVAIL); 777 if (ifa != NULL && 778 ((struct in6_ifaddr *)ifa)->ia6_flags & 779 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 780 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 781 ifa_free(ifa); 782 return (EADDRNOTAVAIL); 783 } 784 if (ifa != NULL) 785 ifa_free(ifa); 786 INP_INFO_WLOCK(&V_ripcbinfo); 787 INP_WLOCK(inp); 788 inp->in6p_laddr = addr->sin6_addr; 789 INP_WUNLOCK(inp); 790 INP_INFO_WUNLOCK(&V_ripcbinfo); 791 return (0); 792 } 793 794 static int 795 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 796 { 797 struct inpcb *inp; 798 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 799 struct in6_addr in6a; 800 struct ifnet *ifp = NULL; 801 int error = 0, scope_ambiguous = 0; 802 803 inp = sotoinpcb(so); 804 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 805 806 if (nam->sa_len != sizeof(*addr)) 807 return (EINVAL); 808 if (TAILQ_EMPTY(&V_ifnet)) 809 return (EADDRNOTAVAIL); 810 if (addr->sin6_family != AF_INET6) 811 return (EAFNOSUPPORT); 812 813 /* 814 * Application should provide a proper zone ID or the use of default 815 * zone IDs should be enabled. Unfortunately, some applications do 816 * not behave as it should, so we need a workaround. Even if an 817 * appropriate ID is not determined, we'll see if we can determine 818 * the outgoing interface. If we can, determine the zone ID based on 819 * the interface below. 820 */ 821 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 822 scope_ambiguous = 1; 823 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 824 return (error); 825 826 INP_INFO_WLOCK(&V_ripcbinfo); 827 INP_WLOCK(inp); 828 /* Source address selection. XXX: need pcblookup? */ 829 error = in6_selectsrc(addr, inp->in6p_outputopts, 830 inp, NULL, so->so_cred, &ifp, &in6a); 831 if (error) { 832 INP_WUNLOCK(inp); 833 INP_INFO_WUNLOCK(&V_ripcbinfo); 834 return (error); 835 } 836 837 /* XXX: see above */ 838 if (ifp && scope_ambiguous && 839 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 840 INP_WUNLOCK(inp); 841 INP_INFO_WUNLOCK(&V_ripcbinfo); 842 return (error); 843 } 844 inp->in6p_faddr = addr->sin6_addr; 845 inp->in6p_laddr = in6a; 846 soisconnected(so); 847 INP_WUNLOCK(inp); 848 INP_INFO_WUNLOCK(&V_ripcbinfo); 849 return (0); 850 } 851 852 static int 853 rip6_shutdown(struct socket *so) 854 { 855 struct inpcb *inp; 856 857 inp = sotoinpcb(so); 858 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 859 860 INP_WLOCK(inp); 861 socantsendmore(so); 862 INP_WUNLOCK(inp); 863 return (0); 864 } 865 866 static int 867 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 868 struct mbuf *control, struct thread *td) 869 { 870 struct inpcb *inp; 871 struct sockaddr_in6 tmp; 872 struct sockaddr_in6 *dst; 873 int ret; 874 875 inp = sotoinpcb(so); 876 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 877 878 /* Always copy sockaddr to avoid overwrites. */ 879 /* Unlocked read. */ 880 if (so->so_state & SS_ISCONNECTED) { 881 if (nam) { 882 m_freem(m); 883 return (EISCONN); 884 } 885 /* XXX */ 886 bzero(&tmp, sizeof(tmp)); 887 tmp.sin6_family = AF_INET6; 888 tmp.sin6_len = sizeof(struct sockaddr_in6); 889 INP_RLOCK(inp); 890 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 891 sizeof(struct in6_addr)); 892 INP_RUNLOCK(inp); 893 dst = &tmp; 894 } else { 895 if (nam == NULL) { 896 m_freem(m); 897 return (ENOTCONN); 898 } 899 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 900 m_freem(m); 901 return (EINVAL); 902 } 903 tmp = *(struct sockaddr_in6 *)nam; 904 dst = &tmp; 905 906 if (dst->sin6_family == AF_UNSPEC) { 907 /* 908 * XXX: we allow this case for backward 909 * compatibility to buggy applications that 910 * rely on old (and wrong) kernel behavior. 911 */ 912 log(LOG_INFO, "rip6 SEND: address family is " 913 "unspec. Assume AF_INET6\n"); 914 dst->sin6_family = AF_INET6; 915 } else if (dst->sin6_family != AF_INET6) { 916 m_freem(m); 917 return(EAFNOSUPPORT); 918 } 919 } 920 ret = rip6_output(m, so, dst, control); 921 return (ret); 922 } 923 924 struct pr_usrreqs rip6_usrreqs = { 925 .pru_abort = rip6_abort, 926 .pru_attach = rip6_attach, 927 .pru_bind = rip6_bind, 928 .pru_connect = rip6_connect, 929 .pru_control = in6_control, 930 .pru_detach = rip6_detach, 931 .pru_disconnect = rip6_disconnect, 932 .pru_peeraddr = in6_getpeeraddr, 933 .pru_send = rip6_send, 934 .pru_shutdown = rip6_shutdown, 935 .pru_sockaddr = in6_getsockaddr, 936 .pru_close = rip6_close, 937 };
Cache object: 540cc56ca6db300e737956555a0a2284
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