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sys/netinet6/raw_ip6.c
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1 /* $NetBSD: raw_ip6.c,v 1.182 2022/11/04 09:01:53 ozaki-r Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1988, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.182 2022/11/04 09:01:53 ozaki-r Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_ipsec.h" 69 #include "opt_net_mpsafe.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/sysctl.h> 74 #include <sys/mbuf.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/socketvar.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/kauth.h> 81 #include <sys/kmem.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/net_stats.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_private.h> 92 #include <netinet6/ip6_mroute.h> 93 #include <netinet/icmp6.h> 94 #include <netinet6/icmp6_private.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/ip6protosw.h> 97 #include <netinet6/scope6_var.h> 98 #include <netinet6/raw_ip6.h> 99 100 #ifdef IPSEC 101 #include <netipsec/ipsec.h> 102 #include <netipsec/ipsec6.h> 103 #endif 104 105 #include "faith.h" 106 #if defined(NFAITH) && 0 < NFAITH 107 #include <net/if_faith.h> 108 #endif 109 110 extern struct inpcbtable rawcbtable; 111 struct inpcbtable raw6cbtable; 112 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 113 114 /* 115 * Raw interface to IP6 protocol. 116 */ 117 118 static percpu_t *rip6stat_percpu; 119 120 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 121 122 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 123 124 /* 125 * Initialize raw connection block queue. 126 */ 127 void 128 rip6_init(void) 129 { 130 131 sysctl_net_inet6_raw6_setup(NULL); 132 in6pcb_init(&raw6cbtable, 1, 1); 133 134 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 135 } 136 137 static void 138 rip6_sbappendaddr(struct inpcb *last, struct ip6_hdr *ip6, 139 const struct sockaddr *sa, int hlen, struct mbuf *n) 140 { 141 struct mbuf *opts = NULL; 142 143 if (last->inp_flags & IN6P_CONTROLOPTS) 144 ip6_savecontrol(last, &opts, ip6, n); 145 146 m_adj(n, hlen); 147 148 if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) { 149 soroverflow(last->inp_socket); 150 m_freem(n); 151 if (opts) 152 m_freem(opts); 153 RIP6_STATINC(RIP6_STAT_FULLSOCK); 154 } else { 155 sorwakeup(last->inp_socket); 156 } 157 } 158 159 /* 160 * Setup generic address and protocol structures 161 * for raw_input routine, then pass them along with 162 * mbuf chain. 163 */ 164 int 165 rip6_input(struct mbuf **mp, int *offp, int proto) 166 { 167 struct mbuf *m = *mp; 168 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 169 struct inpcb *inp; 170 struct inpcb *last = NULL; 171 struct sockaddr_in6 rip6src; 172 struct mbuf *n; 173 174 RIP6_STATINC(RIP6_STAT_IPACKETS); 175 176 #if defined(NFAITH) && 0 < NFAITH 177 if (faithprefix(&ip6->ip6_dst)) { 178 /* send icmp6 host unreach? */ 179 m_freem(m); 180 return IPPROTO_DONE; 181 } 182 #endif 183 184 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 185 if (sa6_recoverscope(&rip6src) != 0) { 186 /* XXX: should be impossible. */ 187 m_freem(m); 188 return IPPROTO_DONE; 189 } 190 191 TAILQ_FOREACH(inp, &raw6cbtable.inpt_queue, inp_queue) { 192 if (inp->inp_af != AF_INET6) 193 continue; 194 if (in6p_ip6(inp).ip6_nxt && 195 in6p_ip6(inp).ip6_nxt != proto) 196 continue; 197 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p_laddr(inp)) && 198 !IN6_ARE_ADDR_EQUAL(&in6p_laddr(inp), &ip6->ip6_dst)) 199 continue; 200 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p_faddr(inp)) && 201 !IN6_ARE_ADDR_EQUAL(&in6p_faddr(inp), &ip6->ip6_src)) 202 continue; 203 if (in6p_cksum(inp) != -1) { 204 RIP6_STATINC(RIP6_STAT_ISUM); 205 if (in6_cksum(m, proto, *offp, 206 m->m_pkthdr.len - *offp)) { 207 RIP6_STATINC(RIP6_STAT_BADSUM); 208 continue; 209 } 210 } 211 212 if (last == NULL) { 213 ; 214 } 215 #ifdef IPSEC 216 else if (ipsec_used && ipsec_in_reject(m, last)) { 217 /* do not inject data into pcb */ 218 } 219 #endif 220 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 221 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), 222 *offp, n); 223 } 224 225 last = inp; 226 } 227 228 #ifdef IPSEC 229 if (ipsec_used && last && ipsec_in_reject(m, last)) { 230 m_freem(m); 231 IP6_STATDEC(IP6_STAT_DELIVERED); 232 /* do not inject data into pcb */ 233 } else 234 #endif 235 if (last != NULL) { 236 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), *offp, m); 237 } else { 238 RIP6_STATINC(RIP6_STAT_NOSOCK); 239 if (m->m_flags & M_MCAST) 240 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 241 if (proto == IPPROTO_NONE) 242 m_freem(m); 243 else { 244 int s; 245 struct ifnet *rcvif = m_get_rcvif(m, &s); 246 const int prvnxt = ip6_get_prevhdr(m, *offp); 247 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 248 m_put_rcvif(rcvif, &s); 249 icmp6_error(m, ICMP6_PARAM_PROB, 250 ICMP6_PARAMPROB_NEXTHEADER, 251 prvnxt); 252 } 253 IP6_STATDEC(IP6_STAT_DELIVERED); 254 } 255 return IPPROTO_DONE; 256 } 257 258 void * 259 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 260 { 261 struct ip6_hdr *ip6; 262 struct ip6ctlparam *ip6cp = NULL; 263 const struct sockaddr_in6 *sa6_src = NULL; 264 void *cmdarg; 265 void (*notify)(struct inpcb *, int) = in6pcb_rtchange; 266 int nxt; 267 268 if (sa->sa_family != AF_INET6 || 269 sa->sa_len != sizeof(struct sockaddr_in6)) 270 return NULL; 271 272 if ((unsigned)cmd >= PRC_NCMDS) 273 return NULL; 274 if (PRC_IS_REDIRECT(cmd)) 275 notify = in6pcb_rtchange, d = NULL; 276 else if (cmd == PRC_HOSTDEAD) 277 d = NULL; 278 else if (cmd == PRC_MSGSIZE) 279 ; /* special code is present, see below */ 280 else if (inet6ctlerrmap[cmd] == 0) 281 return NULL; 282 283 /* if the parameter is from icmp6, decode it. */ 284 if (d != NULL) { 285 ip6cp = (struct ip6ctlparam *)d; 286 ip6 = ip6cp->ip6c_ip6; 287 cmdarg = ip6cp->ip6c_cmdarg; 288 sa6_src = ip6cp->ip6c_src; 289 nxt = ip6cp->ip6c_nxt; 290 } else { 291 ip6 = NULL; 292 cmdarg = NULL; 293 sa6_src = &sa6_any; 294 nxt = -1; 295 } 296 297 if (ip6 && cmd == PRC_MSGSIZE) { 298 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 299 int valid = 0; 300 struct inpcb *inp; 301 302 /* 303 * Check to see if we have a valid raw IPv6 socket 304 * corresponding to the address in the ICMPv6 message 305 * payload, and the protocol (ip6_nxt) meets the socket. 306 * XXX chase extension headers, or pass final nxt value 307 * from icmp6_notify_error() 308 */ 309 inp = NULL; 310 inp = in6pcb_lookup(&raw6cbtable, &sa6->sin6_addr, 0, 311 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 312 #if 0 313 if (!inp) { 314 /* 315 * As the use of sendto(2) is fairly popular, 316 * we may want to allow non-connected pcb too. 317 * But it could be too weak against attacks... 318 * We should at least check if the local 319 * address (= s) is really ours. 320 */ 321 inp = in6pcb_lookup_bound(&raw6cbtable, 322 &sa6->sin6_addr, 0, 0); 323 } 324 #endif 325 326 if (inp && in6p_ip6(inp).ip6_nxt && 327 in6p_ip6(inp).ip6_nxt == nxt) 328 valid++; 329 330 /* 331 * Depending on the value of "valid" and routing table 332 * size (mtudisc_{hi,lo}wat), we will: 333 * - recalculate the new MTU and create the 334 * corresponding routing entry, or 335 * - ignore the MTU change notification. 336 */ 337 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 338 339 /* 340 * regardless of if we called icmp6_mtudisc_update(), 341 * we need to call in6pcb_notify(), to notify path MTU 342 * change to the userland (RFC3542), because some 343 * unconnected sockets may share the same destination 344 * and want to know the path MTU. 345 */ 346 } 347 348 (void) in6pcb_notify(&raw6cbtable, sa, 0, 349 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 350 return NULL; 351 } 352 353 /* 354 * Generate IPv6 header and pass packet to ip6_output. 355 * Tack on options user may have setup with control call. 356 */ 357 int 358 rip6_output(struct mbuf *m, struct socket * const so, 359 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 360 { 361 struct in6_addr *dst; 362 struct ip6_hdr *ip6; 363 struct inpcb *inp; 364 u_int plen = m->m_pkthdr.len; 365 int error = 0; 366 struct ip6_pktopts opt, *optp = NULL; 367 struct ifnet *oifp = NULL; 368 int type, code; /* for ICMPv6 output statistics only */ 369 int scope_ambiguous = 0; 370 int bound = curlwp_bind(); 371 struct psref psref; 372 373 inp = sotoinpcb(so); 374 375 dst = &dstsock->sin6_addr; 376 if (control) { 377 if ((error = ip6_setpktopts(control, &opt, 378 in6p_outputopts(inp), 379 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 380 goto bad; 381 } 382 optp = &opt; 383 } else 384 optp = in6p_outputopts(inp); 385 386 /* 387 * Check and convert scope zone ID into internal form. 388 * XXX: we may still need to determine the zone later. 389 */ 390 if (!(so->so_state & SS_ISCONNECTED)) { 391 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 392 scope_ambiguous = 1; 393 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 394 goto bad; 395 } 396 397 /* 398 * For an ICMPv6 packet, we should know its type and code 399 * to update statistics. 400 */ 401 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 402 struct icmp6_hdr *icmp6; 403 if (m->m_len < sizeof(struct icmp6_hdr) && 404 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 405 error = ENOBUFS; 406 goto bad; 407 } 408 icmp6 = mtod(m, struct icmp6_hdr *); 409 type = icmp6->icmp6_type; 410 code = icmp6->icmp6_code; 411 } else { 412 type = 0; 413 code = 0; 414 } 415 416 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 417 if (!m) { 418 error = ENOBUFS; 419 goto bad; 420 } 421 ip6 = mtod(m, struct ip6_hdr *); 422 423 /* 424 * Next header might not be ICMP6 but use its pseudo header anyway. 425 */ 426 ip6->ip6_dst = *dst; 427 428 /* 429 * Source address selection. 430 */ 431 error = in6_selectsrc(dstsock, optp, in6p_moptions(inp), 432 &inp->inp_route, &in6p_laddr(inp), &oifp, &psref, &ip6->ip6_src); 433 if (error != 0) 434 goto bad; 435 436 if (oifp && scope_ambiguous) { 437 /* 438 * Application should provide a proper zone ID or the use of 439 * default zone IDs should be enabled. Unfortunately, some 440 * applications do not behave as it should, so we need a 441 * workaround. Even if an appropriate ID is not determined 442 * (when it's required), if we can determine the outgoing 443 * interface. determine the zone ID based on the interface. 444 */ 445 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 446 if (error != 0) 447 goto bad; 448 } 449 ip6->ip6_dst = dstsock->sin6_addr; 450 451 /* fill in the rest of the IPv6 header fields */ 452 ip6->ip6_flow = in6p_flowinfo(inp) & IPV6_FLOWINFO_MASK; 453 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 454 ip6->ip6_vfc |= IPV6_VERSION; 455 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 456 ip6->ip6_nxt = in6p_ip6(inp).ip6_nxt; 457 ip6->ip6_hlim = in6pcb_selecthlim(inp, oifp); 458 459 if_put(oifp, &psref); 460 oifp = NULL; 461 462 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 463 in6p_cksum(inp) != -1) { 464 const uint8_t nxt = ip6->ip6_nxt; 465 int off; 466 u_int16_t sum; 467 468 /* compute checksum */ 469 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 470 off = offsetof(struct icmp6_hdr, icmp6_cksum); 471 else 472 off = in6p_cksum(inp); 473 if (plen < off + 1) { 474 error = EINVAL; 475 goto bad; 476 } 477 off += sizeof(struct ip6_hdr); 478 479 sum = 0; 480 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 481 M_DONTWAIT); 482 if (m == NULL) { 483 error = ENOBUFS; 484 goto bad; 485 } 486 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 487 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 488 M_DONTWAIT); 489 if (m == NULL) { 490 error = ENOBUFS; 491 goto bad; 492 } 493 } 494 495 { 496 struct ifnet *ret_oifp = NULL; 497 498 error = ip6_output(m, optp, &inp->inp_route, 0, 499 in6p_moptions(inp), inp, &ret_oifp); 500 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 501 if (ret_oifp) 502 icmp6_ifoutstat_inc(ret_oifp, type, code); 503 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 504 } else 505 RIP6_STATINC(RIP6_STAT_OPACKETS); 506 } 507 508 goto freectl; 509 510 bad: 511 if (m) 512 m_freem(m); 513 514 freectl: 515 if (control) { 516 ip6_clearpktopts(&opt, -1); 517 m_freem(control); 518 } 519 if_put(oifp, &psref); 520 curlwp_bindx(bound); 521 return error; 522 } 523 524 /* 525 * Raw IPv6 socket option processing. 526 */ 527 int 528 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 529 { 530 int error = 0; 531 532 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 533 int optval; 534 535 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 536 if (op == PRCO_GETOPT) { 537 optval = 1; 538 error = sockopt_set(sopt, &optval, sizeof(optval)); 539 } else if (op == PRCO_SETOPT) { 540 error = sockopt_getint(sopt, &optval); 541 if (error) 542 goto out; 543 if (optval == 0) 544 error = EINVAL; 545 } 546 547 goto out; 548 } else if (sopt->sopt_level != IPPROTO_IPV6) 549 return ip6_ctloutput(op, so, sopt); 550 551 switch (sopt->sopt_name) { 552 case MRT6_INIT: 553 case MRT6_DONE: 554 case MRT6_ADD_MIF: 555 case MRT6_DEL_MIF: 556 case MRT6_ADD_MFC: 557 case MRT6_DEL_MFC: 558 case MRT6_PIM: 559 if (op == PRCO_SETOPT) 560 error = ip6_mrouter_set(so, sopt); 561 else if (op == PRCO_GETOPT) 562 error = ip6_mrouter_get(so, sopt); 563 else 564 error = EINVAL; 565 break; 566 case IPV6_CHECKSUM: 567 return ip6_raw_ctloutput(op, so, sopt); 568 default: 569 return ip6_ctloutput(op, so, sopt); 570 } 571 out: 572 return error; 573 } 574 575 extern u_long rip6_sendspace; 576 extern u_long rip6_recvspace; 577 578 int 579 rip6_attach(struct socket *so, int proto) 580 { 581 struct inpcb *inp; 582 int s, error; 583 584 KASSERT(sotoinpcb(so) == NULL); 585 sosetlock(so); 586 587 error = kauth_authorize_network(kauth_cred_get(), 588 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 589 KAUTH_ARG(AF_INET6), 590 KAUTH_ARG(SOCK_RAW), 591 KAUTH_ARG(so->so_proto->pr_protocol)); 592 if (error) { 593 return error; 594 } 595 s = splsoftnet(); 596 error = soreserve(so, rip6_sendspace, rip6_recvspace); 597 if (error) { 598 splx(s); 599 return error; 600 } 601 if ((error = inpcb_create(so, &raw6cbtable)) != 0) { 602 splx(s); 603 return error; 604 } 605 splx(s); 606 inp = sotoinpcb(so); 607 in6p_ip6(inp).ip6_nxt = proto; 608 in6p_cksum(inp) = -1; 609 610 in6p_icmp6filt(inp) = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 611 ICMP6_FILTER_SETPASSALL(in6p_icmp6filt(inp)); 612 KASSERT(solocked(so)); 613 return error; 614 } 615 616 static void 617 rip6_detach(struct socket *so) 618 { 619 struct inpcb *inp = sotoinpcb(so); 620 621 KASSERT(solocked(so)); 622 KASSERT(inp != NULL); 623 624 if (so == ip6_mrouter) { 625 ip6_mrouter_done(); 626 } 627 /* xxx: RSVP */ 628 if (in6p_icmp6filt(inp) != NULL) { 629 kmem_free(in6p_icmp6filt(inp), sizeof(struct icmp6_filter)); 630 in6p_icmp6filt(inp) = NULL; 631 } 632 inpcb_destroy(inp); 633 } 634 635 static int 636 rip6_accept(struct socket *so, struct sockaddr *nam) 637 { 638 KASSERT(solocked(so)); 639 640 return EOPNOTSUPP; 641 } 642 643 static int 644 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 645 { 646 struct inpcb *inp = sotoinpcb(so); 647 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 648 struct ifaddr *ifa = NULL; 649 int error = 0; 650 int s; 651 652 KASSERT(solocked(so)); 653 KASSERT(inp != NULL); 654 KASSERT(nam != NULL); 655 656 if (addr->sin6_len != sizeof(*addr)) 657 return EINVAL; 658 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 659 return EADDRNOTAVAIL; 660 661 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 662 return error; 663 664 /* 665 * we don't support mapped address here, it would confuse 666 * users so reject it 667 */ 668 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 669 return EADDRNOTAVAIL; 670 s = pserialize_read_enter(); 671 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 672 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 673 error = EADDRNOTAVAIL; 674 goto out; 675 } 676 if (ifa && (ifatoia6(ifa))->ia6_flags & 677 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 678 error = EADDRNOTAVAIL; 679 goto out; 680 } 681 682 in6p_laddr(inp) = addr->sin6_addr; 683 error = 0; 684 out: 685 pserialize_read_exit(s); 686 return error; 687 } 688 689 static int 690 rip6_listen(struct socket *so, struct lwp *l) 691 { 692 KASSERT(solocked(so)); 693 694 return EOPNOTSUPP; 695 } 696 697 static int 698 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 699 { 700 struct inpcb *inp = sotoinpcb(so); 701 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 702 struct in6_addr in6a; 703 struct ifnet *ifp = NULL; 704 int scope_ambiguous = 0; 705 int error = 0; 706 struct psref psref; 707 int bound; 708 709 KASSERT(solocked(so)); 710 KASSERT(inp != NULL); 711 KASSERT(nam != NULL); 712 713 if (IFNET_READER_EMPTY()) 714 return EADDRNOTAVAIL; 715 if (addr->sin6_family != AF_INET6) 716 return EAFNOSUPPORT; 717 if (addr->sin6_len != sizeof(*addr)) 718 return EINVAL; 719 720 /* 721 * Application should provide a proper zone ID or the use of 722 * default zone IDs should be enabled. Unfortunately, some 723 * applications do not behave as it should, so we need a 724 * workaround. Even if an appropriate ID is not determined, 725 * we'll see if we can determine the outgoing interface. If we 726 * can, determine the zone ID based on the interface below. 727 */ 728 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 729 scope_ambiguous = 1; 730 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 731 return error; 732 733 bound = curlwp_bind(); 734 /* Source address selection. XXX: need pcblookup? */ 735 error = in6_selectsrc(addr, in6p_outputopts(inp), 736 in6p_moptions(inp), &inp->inp_route, 737 &in6p_laddr(inp), &ifp, &psref, &in6a); 738 if (error != 0) 739 goto out; 740 /* XXX: see above */ 741 if (ifp && scope_ambiguous && 742 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 743 goto out; 744 } 745 in6p_laddr(inp) = in6a; 746 in6p_faddr(inp) = addr->sin6_addr; 747 soisconnected(so); 748 out: 749 if_put(ifp, &psref); 750 curlwp_bindx(bound); 751 return error; 752 } 753 754 static int 755 rip6_connect2(struct socket *so, struct socket *so2) 756 { 757 KASSERT(solocked(so)); 758 759 return EOPNOTSUPP; 760 } 761 762 static int 763 rip6_disconnect(struct socket *so) 764 { 765 struct inpcb *inp = sotoinpcb(so); 766 767 KASSERT(solocked(so)); 768 KASSERT(inp != NULL); 769 770 if ((so->so_state & SS_ISCONNECTED) == 0) 771 return ENOTCONN; 772 773 in6p_faddr(inp) = in6addr_any; 774 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 775 return 0; 776 } 777 778 static int 779 rip6_shutdown(struct socket *so) 780 { 781 KASSERT(solocked(so)); 782 783 /* 784 * Mark the connection as being incapable of further input. 785 */ 786 socantsendmore(so); 787 return 0; 788 } 789 790 static int 791 rip6_abort(struct socket *so) 792 { 793 KASSERT(solocked(so)); 794 795 soisdisconnected(so); 796 rip6_detach(so); 797 return 0; 798 } 799 800 static int 801 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 802 { 803 return in6_control(so, cmd, nam, ifp); 804 } 805 806 static int 807 rip6_stat(struct socket *so, struct stat *ub) 808 { 809 KASSERT(solocked(so)); 810 811 /* stat: don't bother with a blocksize */ 812 return 0; 813 } 814 815 static int 816 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 817 { 818 KASSERT(solocked(so)); 819 KASSERT(sotoinpcb(so) != NULL); 820 KASSERT(nam != NULL); 821 822 in6pcb_fetch_peeraddr(sotoinpcb(so), (struct sockaddr_in6 *)nam); 823 return 0; 824 } 825 826 static int 827 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 828 { 829 KASSERT(solocked(so)); 830 KASSERT(sotoinpcb(so) != NULL); 831 KASSERT(nam != NULL); 832 833 in6pcb_fetch_sockaddr(sotoinpcb(so), (struct sockaddr_in6 *)nam); 834 return 0; 835 } 836 837 static int 838 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 839 { 840 KASSERT(solocked(so)); 841 842 return EOPNOTSUPP; 843 } 844 845 static int 846 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 847 { 848 KASSERT(solocked(so)); 849 850 return EOPNOTSUPP; 851 } 852 853 static int 854 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 855 struct mbuf *control, struct lwp *l) 856 { 857 struct inpcb *inp = sotoinpcb(so); 858 struct sockaddr_in6 tmp; 859 struct sockaddr_in6 *dst; 860 int error = 0; 861 862 KASSERT(solocked(so)); 863 KASSERT(inp != NULL); 864 KASSERT(m != NULL); 865 866 /* 867 * Ship a packet out. The appropriate raw output 868 * routine handles any messaging necessary. 869 */ 870 871 /* always copy sockaddr to avoid overwrites */ 872 if (so->so_state & SS_ISCONNECTED) { 873 if (nam) { 874 error = EISCONN; 875 goto release; 876 } 877 /* XXX */ 878 sockaddr_in6_init(&tmp, &in6p_faddr(inp), 0, 0, 0); 879 dst = &tmp; 880 } else { 881 if (nam == NULL) { 882 error = ENOTCONN; 883 goto release; 884 } 885 tmp = *(struct sockaddr_in6 *)nam; 886 dst = &tmp; 887 888 if (dst->sin6_family != AF_INET6) { 889 error = EAFNOSUPPORT; 890 goto release; 891 } 892 if (dst->sin6_len != sizeof(*dst)) { 893 error = EINVAL; 894 goto release; 895 } 896 } 897 error = rip6_output(m, so, dst, control); 898 m = NULL; 899 900 release: 901 if (m) 902 m_freem(m); 903 904 return error; 905 } 906 907 static int 908 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 909 { 910 KASSERT(solocked(so)); 911 912 m_freem(m); 913 m_freem(control); 914 915 return EOPNOTSUPP; 916 } 917 918 static int 919 rip6_purgeif(struct socket *so, struct ifnet *ifp) 920 { 921 922 mutex_enter(softnet_lock); 923 in6pcb_purgeif0(&raw6cbtable, ifp); 924 #ifdef NET_MPSAFE 925 mutex_exit(softnet_lock); 926 #endif 927 in6_purgeif(ifp); 928 #ifdef NET_MPSAFE 929 mutex_enter(softnet_lock); 930 #endif 931 in6pcb_purgeif(&raw6cbtable, ifp); 932 mutex_exit(softnet_lock); 933 934 return 0; 935 } 936 937 static int 938 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 939 { 940 941 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 942 } 943 944 static void 945 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 946 { 947 948 sysctl_createv(clog, 0, NULL, NULL, 949 CTLFLAG_PERMANENT, 950 CTLTYPE_NODE, "inet6", NULL, 951 NULL, 0, NULL, 0, 952 CTL_NET, PF_INET6, CTL_EOL); 953 sysctl_createv(clog, 0, NULL, NULL, 954 CTLFLAG_PERMANENT, 955 CTLTYPE_NODE, "raw6", 956 SYSCTL_DESCR("Raw IPv6 settings"), 957 NULL, 0, NULL, 0, 958 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 959 960 sysctl_createv(clog, 0, NULL, NULL, 961 CTLFLAG_PERMANENT, 962 CTLTYPE_STRUCT, "pcblist", 963 SYSCTL_DESCR("Raw IPv6 control block list"), 964 sysctl_inpcblist, 0, &raw6cbtable, 0, 965 CTL_NET, PF_INET6, IPPROTO_RAW, 966 CTL_CREATE, CTL_EOL); 967 sysctl_createv(clog, 0, NULL, NULL, 968 CTLFLAG_PERMANENT, 969 CTLTYPE_STRUCT, "stats", 970 SYSCTL_DESCR("Raw IPv6 statistics"), 971 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 972 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 973 CTL_EOL); 974 } 975 976 PR_WRAP_USRREQS(rip6) 977 #define rip6_attach rip6_attach_wrapper 978 #define rip6_detach rip6_detach_wrapper 979 #define rip6_accept rip6_accept_wrapper 980 #define rip6_bind rip6_bind_wrapper 981 #define rip6_listen rip6_listen_wrapper 982 #define rip6_connect rip6_connect_wrapper 983 #define rip6_connect2 rip6_connect2_wrapper 984 #define rip6_disconnect rip6_disconnect_wrapper 985 #define rip6_shutdown rip6_shutdown_wrapper 986 #define rip6_abort rip6_abort_wrapper 987 #define rip6_ioctl rip6_ioctl_wrapper 988 #define rip6_stat rip6_stat_wrapper 989 #define rip6_peeraddr rip6_peeraddr_wrapper 990 #define rip6_sockaddr rip6_sockaddr_wrapper 991 #define rip6_rcvd rip6_rcvd_wrapper 992 #define rip6_recvoob rip6_recvoob_wrapper 993 #define rip6_send rip6_send_wrapper 994 #define rip6_sendoob rip6_sendoob_wrapper 995 #define rip6_purgeif rip6_purgeif_wrapper 996 997 const struct pr_usrreqs rip6_usrreqs = { 998 .pr_attach = rip6_attach, 999 .pr_detach = rip6_detach, 1000 .pr_accept = rip6_accept, 1001 .pr_bind = rip6_bind, 1002 .pr_listen = rip6_listen, 1003 .pr_connect = rip6_connect, 1004 .pr_connect2 = rip6_connect2, 1005 .pr_disconnect = rip6_disconnect, 1006 .pr_shutdown = rip6_shutdown, 1007 .pr_abort = rip6_abort, 1008 .pr_ioctl = rip6_ioctl, 1009 .pr_stat = rip6_stat, 1010 .pr_peeraddr = rip6_peeraddr, 1011 .pr_sockaddr = rip6_sockaddr, 1012 .pr_rcvd = rip6_rcvd, 1013 .pr_recvoob = rip6_recvoob, 1014 .pr_send = rip6_send, 1015 .pr_sendoob = rip6_sendoob, 1016 .pr_purgeif = rip6_purgeif, 1017 };
Cache object: c99c8b43584329f9cc07f53c2e45808c
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