raw_ip6.c revision 1.175
1 /* $NetBSD: raw_ip6.c,v 1.175 2019/02/25 06:49:44 maxv 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 1.175 2019/02/25 06:49:44 maxv 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 in6_pcbinit(&raw6cbtable, 1, 1); 133 134 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 135 } 136 137 static void 138 rip6_sbappendaddr(struct in6pcb *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->in6p_flags & IN6P_CONTROLOPTS) 144 ip6_savecontrol(last, &opts, ip6, n); 145 146 m_adj(n, hlen); 147 148 if (sbappendaddr(&last->in6p_socket->so_rcv, sa, n, opts) == 0) { 149 soroverflow(last->in6p_socket); 150 m_freem(n); 151 if (opts) 152 m_freem(opts); 153 RIP6_STATINC(RIP6_STAT_FULLSOCK); 154 } else { 155 sorwakeup(last->in6p_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_hdr *inph; 170 struct in6pcb *in6p; 171 struct in6pcb *last = NULL; 172 struct sockaddr_in6 rip6src; 173 struct mbuf *n; 174 175 RIP6_STATINC(RIP6_STAT_IPACKETS); 176 177 #if defined(NFAITH) && 0 < NFAITH 178 if (faithprefix(&ip6->ip6_dst)) { 179 /* send icmp6 host unreach? */ 180 m_freem(m); 181 return IPPROTO_DONE; 182 } 183 #endif 184 185 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 186 if (sa6_recoverscope(&rip6src) != 0) { 187 /* XXX: should be impossible. */ 188 m_freem(m); 189 return IPPROTO_DONE; 190 } 191 192 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 193 in6p = (struct in6pcb *)inph; 194 if (in6p->in6p_af != AF_INET6) 195 continue; 196 if (in6p->in6p_ip6.ip6_nxt && 197 in6p->in6p_ip6.ip6_nxt != proto) 198 continue; 199 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 200 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 201 continue; 202 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 203 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 204 continue; 205 if (in6p->in6p_cksum != -1) { 206 RIP6_STATINC(RIP6_STAT_ISUM); 207 if (in6_cksum(m, proto, *offp, 208 m->m_pkthdr.len - *offp)) { 209 RIP6_STATINC(RIP6_STAT_BADSUM); 210 continue; 211 } 212 } 213 214 if (last == NULL) { 215 ; 216 } 217 #ifdef IPSEC 218 else if (ipsec_used && ipsec_in_reject(m, last)) { 219 /* do not inject data into pcb */ 220 } 221 #endif 222 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 223 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), 224 *offp, n); 225 } 226 227 last = in6p; 228 } 229 230 #ifdef IPSEC 231 if (ipsec_used && last && ipsec_in_reject(m, last)) { 232 m_freem(m); 233 IP6_STATDEC(IP6_STAT_DELIVERED); 234 /* do not inject data into pcb */ 235 } else 236 #endif 237 if (last != NULL) { 238 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), *offp, m); 239 } else { 240 RIP6_STATINC(RIP6_STAT_NOSOCK); 241 if (m->m_flags & M_MCAST) 242 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 243 if (proto == IPPROTO_NONE) 244 m_freem(m); 245 else { 246 int s; 247 struct ifnet *rcvif = m_get_rcvif(m, &s); 248 const int prvnxt = ip6_get_prevhdr(m, *offp); 249 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 250 m_put_rcvif(rcvif, &s); 251 icmp6_error(m, ICMP6_PARAM_PROB, 252 ICMP6_PARAMPROB_NEXTHEADER, 253 prvnxt); 254 } 255 IP6_STATDEC(IP6_STAT_DELIVERED); 256 } 257 return IPPROTO_DONE; 258 } 259 260 void * 261 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 262 { 263 struct ip6_hdr *ip6; 264 struct ip6ctlparam *ip6cp = NULL; 265 const struct sockaddr_in6 *sa6_src = NULL; 266 void *cmdarg; 267 void (*notify)(struct in6pcb *, int) = in6_rtchange; 268 int nxt; 269 270 if (sa->sa_family != AF_INET6 || 271 sa->sa_len != sizeof(struct sockaddr_in6)) 272 return NULL; 273 274 if ((unsigned)cmd >= PRC_NCMDS) 275 return NULL; 276 if (PRC_IS_REDIRECT(cmd)) 277 notify = in6_rtchange, d = NULL; 278 else if (cmd == PRC_HOSTDEAD) 279 d = NULL; 280 else if (cmd == PRC_MSGSIZE) 281 ; /* special code is present, see below */ 282 else if (inet6ctlerrmap[cmd] == 0) 283 return NULL; 284 285 /* if the parameter is from icmp6, decode it. */ 286 if (d != NULL) { 287 ip6cp = (struct ip6ctlparam *)d; 288 ip6 = ip6cp->ip6c_ip6; 289 cmdarg = ip6cp->ip6c_cmdarg; 290 sa6_src = ip6cp->ip6c_src; 291 nxt = ip6cp->ip6c_nxt; 292 } else { 293 ip6 = NULL; 294 cmdarg = NULL; 295 sa6_src = &sa6_any; 296 nxt = -1; 297 } 298 299 if (ip6 && cmd == PRC_MSGSIZE) { 300 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 301 int valid = 0; 302 struct in6pcb *in6p; 303 304 /* 305 * Check to see if we have a valid raw IPv6 socket 306 * corresponding to the address in the ICMPv6 message 307 * payload, and the protocol (ip6_nxt) meets the socket. 308 * XXX chase extension headers, or pass final nxt value 309 * from icmp6_notify_error() 310 */ 311 in6p = NULL; 312 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 313 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 314 #if 0 315 if (!in6p) { 316 /* 317 * As the use of sendto(2) is fairly popular, 318 * we may want to allow non-connected pcb too. 319 * But it could be too weak against attacks... 320 * We should at least check if the local 321 * address (= s) is really ours. 322 */ 323 in6p = in6_pcblookup_bind(&raw6cbtable, 324 &sa6->sin6_addr, 0, 0); 325 } 326 #endif 327 328 if (in6p && in6p->in6p_ip6.ip6_nxt && 329 in6p->in6p_ip6.ip6_nxt == nxt) 330 valid++; 331 332 /* 333 * Depending on the value of "valid" and routing table 334 * size (mtudisc_{hi,lo}wat), we will: 335 * - recalculate the new MTU and create the 336 * corresponding routing entry, or 337 * - ignore the MTU change notification. 338 */ 339 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 340 341 /* 342 * regardless of if we called icmp6_mtudisc_update(), 343 * we need to call in6_pcbnotify(), to notify path MTU 344 * change to the userland (RFC3542), because some 345 * unconnected sockets may share the same destination 346 * and want to know the path MTU. 347 */ 348 } 349 350 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 351 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 352 return NULL; 353 } 354 355 /* 356 * Generate IPv6 header and pass packet to ip6_output. 357 * Tack on options user may have setup with control call. 358 */ 359 int 360 rip6_output(struct mbuf *m, struct socket * const so, 361 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 362 { 363 struct in6_addr *dst; 364 struct ip6_hdr *ip6; 365 struct in6pcb *in6p; 366 u_int plen = m->m_pkthdr.len; 367 int error = 0; 368 struct ip6_pktopts opt, *optp = NULL; 369 struct ifnet *oifp = NULL; 370 int type, code; /* for ICMPv6 output statistics only */ 371 int scope_ambiguous = 0; 372 int bound = curlwp_bind(); 373 struct psref psref; 374 375 in6p = sotoin6pcb(so); 376 377 dst = &dstsock->sin6_addr; 378 if (control) { 379 if ((error = ip6_setpktopts(control, &opt, 380 in6p->in6p_outputopts, 381 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 382 goto bad; 383 } 384 optp = &opt; 385 } else 386 optp = in6p->in6p_outputopts; 387 388 /* 389 * Check and convert scope zone ID into internal form. 390 * XXX: we may still need to determine the zone later. 391 */ 392 if (!(so->so_state & SS_ISCONNECTED)) { 393 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 394 scope_ambiguous = 1; 395 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 396 goto bad; 397 } 398 399 /* 400 * For an ICMPv6 packet, we should know its type and code 401 * to update statistics. 402 */ 403 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 404 struct icmp6_hdr *icmp6; 405 if (m->m_len < sizeof(struct icmp6_hdr) && 406 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 407 error = ENOBUFS; 408 goto bad; 409 } 410 icmp6 = mtod(m, struct icmp6_hdr *); 411 type = icmp6->icmp6_type; 412 code = icmp6->icmp6_code; 413 } else { 414 type = 0; 415 code = 0; 416 } 417 418 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 419 if (!m) { 420 error = ENOBUFS; 421 goto bad; 422 } 423 ip6 = mtod(m, struct ip6_hdr *); 424 425 /* 426 * Next header might not be ICMP6 but use its pseudo header anyway. 427 */ 428 ip6->ip6_dst = *dst; 429 430 /* 431 * Source address selection. 432 */ 433 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 434 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 435 if (error != 0) 436 goto bad; 437 438 if (oifp && scope_ambiguous) { 439 /* 440 * Application should provide a proper zone ID or the use of 441 * default zone IDs should be enabled. Unfortunately, some 442 * applications do not behave as it should, so we need a 443 * workaround. Even if an appropriate ID is not determined 444 * (when it's required), if we can determine the outgoing 445 * interface. determine the zone ID based on the interface. 446 */ 447 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 448 if (error != 0) 449 goto bad; 450 } 451 ip6->ip6_dst = dstsock->sin6_addr; 452 453 /* fill in the rest of the IPv6 header fields */ 454 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 455 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 456 ip6->ip6_vfc |= IPV6_VERSION; 457 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 458 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 459 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 460 461 if_put(oifp, &psref); 462 oifp = NULL; 463 464 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 465 in6p->in6p_cksum != -1) { 466 const uint8_t nxt = ip6->ip6_nxt; 467 int off; 468 u_int16_t sum; 469 470 /* compute checksum */ 471 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 472 off = offsetof(struct icmp6_hdr, icmp6_cksum); 473 else 474 off = in6p->in6p_cksum; 475 if (plen < off + 1) { 476 error = EINVAL; 477 goto bad; 478 } 479 off += sizeof(struct ip6_hdr); 480 481 sum = 0; 482 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 483 M_DONTWAIT); 484 if (m == NULL) { 485 error = ENOBUFS; 486 goto bad; 487 } 488 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 489 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 490 M_DONTWAIT); 491 if (m == NULL) { 492 error = ENOBUFS; 493 goto bad; 494 } 495 } 496 497 { 498 struct ifnet *ret_oifp = NULL; 499 500 error = ip6_output(m, optp, &in6p->in6p_route, 0, 501 in6p->in6p_moptions, in6p, &ret_oifp); 502 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 503 if (ret_oifp) 504 icmp6_ifoutstat_inc(ret_oifp, type, code); 505 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 506 } else 507 RIP6_STATINC(RIP6_STAT_OPACKETS); 508 } 509 510 goto freectl; 511 512 bad: 513 if (m) 514 m_freem(m); 515 516 freectl: 517 if (control) { 518 ip6_clearpktopts(&opt, -1); 519 m_freem(control); 520 } 521 if_put(oifp, &psref); 522 curlwp_bindx(bound); 523 return error; 524 } 525 526 /* 527 * Raw IPv6 socket option processing. 528 */ 529 int 530 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 531 { 532 int error = 0; 533 534 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 535 int optval; 536 537 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 538 if (op == PRCO_GETOPT) { 539 optval = 1; 540 error = sockopt_set(sopt, &optval, sizeof(optval)); 541 } else if (op == PRCO_SETOPT) { 542 error = sockopt_getint(sopt, &optval); 543 if (error) 544 goto out; 545 if (optval == 0) 546 error = EINVAL; 547 } 548 549 goto out; 550 } else if (sopt->sopt_level != IPPROTO_IPV6) 551 return ip6_ctloutput(op, so, sopt); 552 553 switch (sopt->sopt_name) { 554 case MRT6_INIT: 555 case MRT6_DONE: 556 case MRT6_ADD_MIF: 557 case MRT6_DEL_MIF: 558 case MRT6_ADD_MFC: 559 case MRT6_DEL_MFC: 560 case MRT6_PIM: 561 if (op == PRCO_SETOPT) 562 error = ip6_mrouter_set(so, sopt); 563 else if (op == PRCO_GETOPT) 564 error = ip6_mrouter_get(so, sopt); 565 else 566 error = EINVAL; 567 break; 568 case IPV6_CHECKSUM: 569 return ip6_raw_ctloutput(op, so, sopt); 570 default: 571 return ip6_ctloutput(op, so, sopt); 572 } 573 out: 574 return error; 575 } 576 577 extern u_long rip6_sendspace; 578 extern u_long rip6_recvspace; 579 580 int 581 rip6_attach(struct socket *so, int proto) 582 { 583 struct in6pcb *in6p; 584 int s, error; 585 586 KASSERT(sotoin6pcb(so) == NULL); 587 sosetlock(so); 588 589 error = kauth_authorize_network(curlwp->l_cred, 590 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 591 KAUTH_ARG(AF_INET6), 592 KAUTH_ARG(SOCK_RAW), 593 KAUTH_ARG(so->so_proto->pr_protocol)); 594 if (error) { 595 return error; 596 } 597 s = splsoftnet(); 598 error = soreserve(so, rip6_sendspace, rip6_recvspace); 599 if (error) { 600 splx(s); 601 return error; 602 } 603 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 604 splx(s); 605 return error; 606 } 607 splx(s); 608 in6p = sotoin6pcb(so); 609 in6p->in6p_ip6.ip6_nxt = proto; 610 in6p->in6p_cksum = -1; 611 612 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 613 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 614 KASSERT(solocked(so)); 615 return error; 616 } 617 618 static void 619 rip6_detach(struct socket *so) 620 { 621 struct in6pcb *in6p = sotoin6pcb(so); 622 623 KASSERT(solocked(so)); 624 KASSERT(in6p != NULL); 625 626 if (so == ip6_mrouter) { 627 ip6_mrouter_done(); 628 } 629 /* xxx: RSVP */ 630 if (in6p->in6p_icmp6filt != NULL) { 631 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 632 in6p->in6p_icmp6filt = NULL; 633 } 634 in6_pcbdetach(in6p); 635 } 636 637 static int 638 rip6_accept(struct socket *so, struct sockaddr *nam) 639 { 640 KASSERT(solocked(so)); 641 642 return EOPNOTSUPP; 643 } 644 645 static int 646 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 647 { 648 struct in6pcb *in6p = sotoin6pcb(so); 649 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 650 struct ifaddr *ifa = NULL; 651 int error = 0; 652 int s; 653 654 KASSERT(solocked(so)); 655 KASSERT(in6p != NULL); 656 KASSERT(nam != NULL); 657 658 if (addr->sin6_len != sizeof(*addr)) 659 return EINVAL; 660 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 661 return EADDRNOTAVAIL; 662 663 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 664 return error; 665 666 /* 667 * we don't support mapped address here, it would confuse 668 * users so reject it 669 */ 670 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 671 return EADDRNOTAVAIL; 672 s = pserialize_read_enter(); 673 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 674 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 675 error = EADDRNOTAVAIL; 676 goto out; 677 } 678 if (ifa && (ifatoia6(ifa))->ia6_flags & 679 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 680 error = EADDRNOTAVAIL; 681 goto out; 682 } 683 684 in6p->in6p_laddr = addr->sin6_addr; 685 error = 0; 686 out: 687 pserialize_read_exit(s); 688 return error; 689 } 690 691 static int 692 rip6_listen(struct socket *so, struct lwp *l) 693 { 694 KASSERT(solocked(so)); 695 696 return EOPNOTSUPP; 697 } 698 699 static int 700 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 701 { 702 struct in6pcb *in6p = sotoin6pcb(so); 703 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 704 struct in6_addr in6a; 705 struct ifnet *ifp = NULL; 706 int scope_ambiguous = 0; 707 int error = 0; 708 struct psref psref; 709 int bound; 710 711 KASSERT(solocked(so)); 712 KASSERT(in6p != NULL); 713 KASSERT(nam != NULL); 714 715 if (IFNET_READER_EMPTY()) 716 return EADDRNOTAVAIL; 717 if (addr->sin6_family != AF_INET6) 718 return EAFNOSUPPORT; 719 if (addr->sin6_len != sizeof(*addr)) 720 return EINVAL; 721 722 /* 723 * Application should provide a proper zone ID or the use of 724 * default zone IDs should be enabled. Unfortunately, some 725 * applications do not behave as it should, so we need a 726 * workaround. Even if an appropriate ID is not determined, 727 * we'll see if we can determine the outgoing interface. If we 728 * can, determine the zone ID based on the interface below. 729 */ 730 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 731 scope_ambiguous = 1; 732 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 733 return error; 734 735 bound = curlwp_bind(); 736 /* Source address selection. XXX: need pcblookup? */ 737 error = in6_selectsrc(addr, in6p->in6p_outputopts, 738 in6p->in6p_moptions, &in6p->in6p_route, 739 &in6p->in6p_laddr, &ifp, &psref, &in6a); 740 if (error != 0) 741 goto out; 742 /* XXX: see above */ 743 if (ifp && scope_ambiguous && 744 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 745 goto out; 746 } 747 in6p->in6p_laddr = in6a; 748 in6p->in6p_faddr = addr->sin6_addr; 749 soisconnected(so); 750 out: 751 if_put(ifp, &psref); 752 curlwp_bindx(bound); 753 return error; 754 } 755 756 static int 757 rip6_connect2(struct socket *so, struct socket *so2) 758 { 759 KASSERT(solocked(so)); 760 761 return EOPNOTSUPP; 762 } 763 764 static int 765 rip6_disconnect(struct socket *so) 766 { 767 struct in6pcb *in6p = sotoin6pcb(so); 768 769 KASSERT(solocked(so)); 770 KASSERT(in6p != NULL); 771 772 if ((so->so_state & SS_ISCONNECTED) == 0) 773 return ENOTCONN; 774 775 in6p->in6p_faddr = in6addr_any; 776 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 777 return 0; 778 } 779 780 static int 781 rip6_shutdown(struct socket *so) 782 { 783 KASSERT(solocked(so)); 784 785 /* 786 * Mark the connection as being incapable of futther input. 787 */ 788 socantsendmore(so); 789 return 0; 790 } 791 792 static int 793 rip6_abort(struct socket *so) 794 { 795 KASSERT(solocked(so)); 796 797 soisdisconnected(so); 798 rip6_detach(so); 799 return 0; 800 } 801 802 static int 803 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 804 { 805 return in6_control(so, cmd, nam, ifp); 806 } 807 808 static int 809 rip6_stat(struct socket *so, struct stat *ub) 810 { 811 KASSERT(solocked(so)); 812 813 /* stat: don't bother with a blocksize */ 814 return 0; 815 } 816 817 static int 818 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 819 { 820 KASSERT(solocked(so)); 821 KASSERT(sotoin6pcb(so) != NULL); 822 KASSERT(nam != NULL); 823 824 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 825 return 0; 826 } 827 828 static int 829 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 830 { 831 KASSERT(solocked(so)); 832 KASSERT(sotoin6pcb(so) != NULL); 833 KASSERT(nam != NULL); 834 835 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 836 return 0; 837 } 838 839 static int 840 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 841 { 842 KASSERT(solocked(so)); 843 844 return EOPNOTSUPP; 845 } 846 847 static int 848 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 849 { 850 KASSERT(solocked(so)); 851 852 return EOPNOTSUPP; 853 } 854 855 static int 856 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 857 struct mbuf *control, struct lwp *l) 858 { 859 struct in6pcb *in6p = sotoin6pcb(so); 860 struct sockaddr_in6 tmp; 861 struct sockaddr_in6 *dst; 862 int error = 0; 863 864 KASSERT(solocked(so)); 865 KASSERT(in6p != NULL); 866 KASSERT(m != NULL); 867 868 /* 869 * Ship a packet out. The appropriate raw output 870 * routine handles any messaging necessary. 871 */ 872 873 /* always copy sockaddr to avoid overwrites */ 874 if (so->so_state & SS_ISCONNECTED) { 875 if (nam) { 876 error = EISCONN; 877 goto release; 878 } 879 /* XXX */ 880 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 881 dst = &tmp; 882 } else { 883 if (nam == NULL) { 884 error = ENOTCONN; 885 goto release; 886 } 887 tmp = *(struct sockaddr_in6 *)nam; 888 dst = &tmp; 889 890 if (dst->sin6_family != AF_INET6) { 891 error = EAFNOSUPPORT; 892 goto release; 893 } 894 if (dst->sin6_len != sizeof(*dst)) { 895 error = EINVAL; 896 goto release; 897 } 898 } 899 error = rip6_output(m, so, dst, control); 900 m = NULL; 901 902 release: 903 if (m) 904 m_freem(m); 905 906 return error; 907 } 908 909 static int 910 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 911 { 912 KASSERT(solocked(so)); 913 914 m_freem(m); 915 m_freem(control); 916 917 return EOPNOTSUPP; 918 } 919 920 static int 921 rip6_purgeif(struct socket *so, struct ifnet *ifp) 922 { 923 924 mutex_enter(softnet_lock); 925 in6_pcbpurgeif0(&raw6cbtable, ifp); 926 #ifdef NET_MPSAFE 927 mutex_exit(softnet_lock); 928 #endif 929 in6_purgeif(ifp); 930 #ifdef NET_MPSAFE 931 mutex_enter(softnet_lock); 932 #endif 933 in6_pcbpurgeif(&raw6cbtable, ifp); 934 mutex_exit(softnet_lock); 935 936 return 0; 937 } 938 939 static int 940 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 941 { 942 943 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 944 } 945 946 static void 947 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 948 { 949 950 sysctl_createv(clog, 0, NULL, NULL, 951 CTLFLAG_PERMANENT, 952 CTLTYPE_NODE, "inet6", NULL, 953 NULL, 0, NULL, 0, 954 CTL_NET, PF_INET6, CTL_EOL); 955 sysctl_createv(clog, 0, NULL, NULL, 956 CTLFLAG_PERMANENT, 957 CTLTYPE_NODE, "raw6", 958 SYSCTL_DESCR("Raw IPv6 settings"), 959 NULL, 0, NULL, 0, 960 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 961 962 sysctl_createv(clog, 0, NULL, NULL, 963 CTLFLAG_PERMANENT, 964 CTLTYPE_STRUCT, "pcblist", 965 SYSCTL_DESCR("Raw IPv6 control block list"), 966 sysctl_inpcblist, 0, &raw6cbtable, 0, 967 CTL_NET, PF_INET6, IPPROTO_RAW, 968 CTL_CREATE, CTL_EOL); 969 sysctl_createv(clog, 0, NULL, NULL, 970 CTLFLAG_PERMANENT, 971 CTLTYPE_STRUCT, "stats", 972 SYSCTL_DESCR("Raw IPv6 statistics"), 973 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 974 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 975 CTL_EOL); 976 } 977 978 PR_WRAP_USRREQS(rip6) 979 #define rip6_attach rip6_attach_wrapper 980 #define rip6_detach rip6_detach_wrapper 981 #define rip6_accept rip6_accept_wrapper 982 #define rip6_bind rip6_bind_wrapper 983 #define rip6_listen rip6_listen_wrapper 984 #define rip6_connect rip6_connect_wrapper 985 #define rip6_connect2 rip6_connect2_wrapper 986 #define rip6_disconnect rip6_disconnect_wrapper 987 #define rip6_shutdown rip6_shutdown_wrapper 988 #define rip6_abort rip6_abort_wrapper 989 #define rip6_ioctl rip6_ioctl_wrapper 990 #define rip6_stat rip6_stat_wrapper 991 #define rip6_peeraddr rip6_peeraddr_wrapper 992 #define rip6_sockaddr rip6_sockaddr_wrapper 993 #define rip6_rcvd rip6_rcvd_wrapper 994 #define rip6_recvoob rip6_recvoob_wrapper 995 #define rip6_send rip6_send_wrapper 996 #define rip6_sendoob rip6_sendoob_wrapper 997 #define rip6_purgeif rip6_purgeif_wrapper 998 999 const struct pr_usrreqs rip6_usrreqs = { 1000 .pr_attach = rip6_attach, 1001 .pr_detach = rip6_detach, 1002 .pr_accept = rip6_accept, 1003 .pr_bind = rip6_bind, 1004 .pr_listen = rip6_listen, 1005 .pr_connect = rip6_connect, 1006 .pr_connect2 = rip6_connect2, 1007 .pr_disconnect = rip6_disconnect, 1008 .pr_shutdown = rip6_shutdown, 1009 .pr_abort = rip6_abort, 1010 .pr_ioctl = rip6_ioctl, 1011 .pr_stat = rip6_stat, 1012 .pr_peeraddr = rip6_peeraddr, 1013 .pr_sockaddr = rip6_sockaddr, 1014 .pr_rcvd = rip6_rcvd, 1015 .pr_recvoob = rip6_recvoob, 1016 .pr_send = rip6_send, 1017 .pr_sendoob = rip6_sendoob, 1018 .pr_purgeif = rip6_purgeif, 1019 }; 1020
Indexes created Wed Sep 24 15:09:51 GMT 2025