raw_ip6.c revision 1.171
1 /* $NetBSD: raw_ip6.c,v 1.171 2018/04/29 07:05:13 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 1.171 2018/04/29 07:05:13 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 /* 138 * Setup generic address and protocol structures 139 * for raw_input routine, then pass them along with 140 * mbuf chain. 141 */ 142 int 143 rip6_input(struct mbuf **mp, int *offp, int proto) 144 { 145 struct mbuf *m = *mp; 146 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 147 struct inpcb_hdr *inph; 148 struct in6pcb *in6p; 149 struct in6pcb *last = NULL; 150 struct sockaddr_in6 rip6src; 151 struct mbuf *n, *opts = NULL; 152 153 RIP6_STATINC(RIP6_STAT_IPACKETS); 154 155 #if defined(NFAITH) && 0 < NFAITH 156 if (faithprefix(&ip6->ip6_dst)) { 157 /* send icmp6 host unreach? */ 158 m_freem(m); 159 return IPPROTO_DONE; 160 } 161 #endif 162 163 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 164 if (sa6_recoverscope(&rip6src) != 0) { 165 /* XXX: should be impossible. */ 166 m_freem(m); 167 return IPPROTO_DONE; 168 } 169 170 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 171 in6p = (struct in6pcb *)inph; 172 if (in6p->in6p_af != AF_INET6) 173 continue; 174 if (in6p->in6p_ip6.ip6_nxt && 175 in6p->in6p_ip6.ip6_nxt != proto) 176 continue; 177 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 178 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 181 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 182 continue; 183 if (in6p->in6p_cksum != -1) { 184 RIP6_STATINC(RIP6_STAT_ISUM); 185 if (in6_cksum(m, proto, *offp, 186 m->m_pkthdr.len - *offp)) { 187 RIP6_STATINC(RIP6_STAT_BADSUM); 188 continue; 189 } 190 } 191 192 if (last == NULL) { 193 ; 194 } 195 #ifdef IPSEC 196 else if (ipsec_used && ipsec_in_reject(m, last)) { 197 /* do not inject data into pcb */ 198 } 199 #endif 200 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 201 if (last->in6p_flags & IN6P_CONTROLOPTS) 202 ip6_savecontrol(last, &opts, ip6, n); 203 /* strip intermediate headers */ 204 m_adj(n, *offp); 205 if (sbappendaddr(&last->in6p_socket->so_rcv, 206 sin6tosa(&rip6src), n, opts) == 0) { 207 soroverflow(last->in6p_socket); 208 m_freem(n); 209 if (opts) 210 m_freem(opts); 211 RIP6_STATINC(RIP6_STAT_FULLSOCK); 212 } else { 213 sorwakeup(last->in6p_socket); 214 } 215 opts = NULL; 216 } 217 218 last = in6p; 219 } 220 221 #ifdef IPSEC 222 if (ipsec_used && last && ipsec_in_reject(m, last)) { 223 m_freem(m); 224 IP6_STATDEC(IP6_STAT_DELIVERED); 225 /* do not inject data into pcb */ 226 } else 227 #endif 228 if (last) { 229 if (last->in6p_flags & IN6P_CONTROLOPTS) 230 ip6_savecontrol(last, &opts, ip6, m); 231 /* strip intermediate headers */ 232 m_adj(m, *offp); 233 if (sbappendaddr(&last->in6p_socket->so_rcv, 234 sin6tosa(&rip6src), m, opts) == 0) { 235 soroverflow(last->in6p_socket); 236 m_freem(m); 237 if (opts) 238 m_freem(opts); 239 RIP6_STATINC(RIP6_STAT_FULLSOCK); 240 } else 241 sorwakeup(last->in6p_socket); 242 } else { 243 RIP6_STATINC(RIP6_STAT_NOSOCK); 244 if (m->m_flags & M_MCAST) 245 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 246 if (proto == IPPROTO_NONE) 247 m_freem(m); 248 else { 249 int s; 250 struct ifnet *rcvif = m_get_rcvif(m, &s); 251 const int prvnxt = ip6_get_prevhdr(m, *offp); 252 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 253 m_put_rcvif(rcvif, &s); 254 icmp6_error(m, ICMP6_PARAM_PROB, 255 ICMP6_PARAMPROB_NEXTHEADER, 256 prvnxt); 257 } 258 IP6_STATDEC(IP6_STAT_DELIVERED); 259 } 260 return IPPROTO_DONE; 261 } 262 263 void * 264 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 265 { 266 struct ip6_hdr *ip6; 267 struct ip6ctlparam *ip6cp = NULL; 268 const struct sockaddr_in6 *sa6_src = NULL; 269 void *cmdarg; 270 void (*notify)(struct in6pcb *, int) = in6_rtchange; 271 int nxt; 272 273 if (sa->sa_family != AF_INET6 || 274 sa->sa_len != sizeof(struct sockaddr_in6)) 275 return NULL; 276 277 if ((unsigned)cmd >= PRC_NCMDS) 278 return NULL; 279 if (PRC_IS_REDIRECT(cmd)) 280 notify = in6_rtchange, d = NULL; 281 else if (cmd == PRC_HOSTDEAD) 282 d = NULL; 283 else if (cmd == PRC_MSGSIZE) 284 ; /* special code is present, see below */ 285 else if (inet6ctlerrmap[cmd] == 0) 286 return NULL; 287 288 /* if the parameter is from icmp6, decode it. */ 289 if (d != NULL) { 290 ip6cp = (struct ip6ctlparam *)d; 291 ip6 = ip6cp->ip6c_ip6; 292 cmdarg = ip6cp->ip6c_cmdarg; 293 sa6_src = ip6cp->ip6c_src; 294 nxt = ip6cp->ip6c_nxt; 295 } else { 296 ip6 = NULL; 297 cmdarg = NULL; 298 sa6_src = &sa6_any; 299 nxt = -1; 300 } 301 302 if (ip6 && cmd == PRC_MSGSIZE) { 303 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 304 int valid = 0; 305 struct in6pcb *in6p; 306 307 /* 308 * Check to see if we have a valid raw IPv6 socket 309 * corresponding to the address in the ICMPv6 message 310 * payload, and the protocol (ip6_nxt) meets the socket. 311 * XXX chase extension headers, or pass final nxt value 312 * from icmp6_notify_error() 313 */ 314 in6p = NULL; 315 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 316 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 317 #if 0 318 if (!in6p) { 319 /* 320 * As the use of sendto(2) is fairly popular, 321 * we may want to allow non-connected pcb too. 322 * But it could be too weak against attacks... 323 * We should at least check if the local 324 * address (= s) is really ours. 325 */ 326 in6p = in6_pcblookup_bind(&raw6cbtable, 327 &sa6->sin6_addr, 0, 0); 328 } 329 #endif 330 331 if (in6p && in6p->in6p_ip6.ip6_nxt && 332 in6p->in6p_ip6.ip6_nxt == nxt) 333 valid++; 334 335 /* 336 * Depending on the value of "valid" and routing table 337 * size (mtudisc_{hi,lo}wat), we will: 338 * - recalculate the new MTU and create the 339 * corresponding routing entry, or 340 * - ignore the MTU change notification. 341 */ 342 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 343 344 /* 345 * regardless of if we called icmp6_mtudisc_update(), 346 * we need to call in6_pcbnotify(), to notify path MTU 347 * change to the userland (RFC3542), because some 348 * unconnected sockets may share the same destination 349 * and want to know the path MTU. 350 */ 351 } 352 353 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 354 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 355 return NULL; 356 } 357 358 /* 359 * Generate IPv6 header and pass packet to ip6_output. 360 * Tack on options user may have setup with control call. 361 */ 362 int 363 rip6_output(struct mbuf *m, struct socket * const so, 364 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 365 { 366 struct in6_addr *dst; 367 struct ip6_hdr *ip6; 368 struct in6pcb *in6p; 369 u_int plen = m->m_pkthdr.len; 370 int error = 0; 371 struct ip6_pktopts opt, *optp = NULL; 372 struct ifnet *oifp = NULL; 373 int type, code; /* for ICMPv6 output statistics only */ 374 int scope_ambiguous = 0; 375 int bound = curlwp_bind(); 376 struct psref psref; 377 378 in6p = sotoin6pcb(so); 379 380 dst = &dstsock->sin6_addr; 381 if (control) { 382 if ((error = ip6_setpktopts(control, &opt, 383 in6p->in6p_outputopts, 384 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 385 goto bad; 386 } 387 optp = &opt; 388 } else 389 optp = in6p->in6p_outputopts; 390 391 /* 392 * Check and convert scope zone ID into internal form. 393 * XXX: we may still need to determine the zone later. 394 */ 395 if (!(so->so_state & SS_ISCONNECTED)) { 396 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 397 scope_ambiguous = 1; 398 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 399 goto bad; 400 } 401 402 /* 403 * For an ICMPv6 packet, we should know its type and code 404 * to update statistics. 405 */ 406 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 407 struct icmp6_hdr *icmp6; 408 if (m->m_len < sizeof(struct icmp6_hdr) && 409 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 410 error = ENOBUFS; 411 goto bad; 412 } 413 icmp6 = mtod(m, struct icmp6_hdr *); 414 type = icmp6->icmp6_type; 415 code = icmp6->icmp6_code; 416 } else { 417 type = 0; 418 code = 0; 419 } 420 421 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 422 if (!m) { 423 error = ENOBUFS; 424 goto bad; 425 } 426 ip6 = mtod(m, struct ip6_hdr *); 427 428 /* 429 * Next header might not be ICMP6 but use its pseudo header anyway. 430 */ 431 ip6->ip6_dst = *dst; 432 433 /* 434 * Source address selection. 435 */ 436 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 437 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 438 if (error != 0) 439 goto bad; 440 441 if (oifp && scope_ambiguous) { 442 /* 443 * Application should provide a proper zone ID or the use of 444 * default zone IDs should be enabled. Unfortunately, some 445 * applications do not behave as it should, so we need a 446 * workaround. Even if an appropriate ID is not determined 447 * (when it's required), if we can determine the outgoing 448 * interface. determine the zone ID based on the interface. 449 */ 450 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 451 if (error != 0) 452 goto bad; 453 } 454 ip6->ip6_dst = dstsock->sin6_addr; 455 456 /* fill in the rest of the IPv6 header fields */ 457 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 458 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 459 ip6->ip6_vfc |= IPV6_VERSION; 460 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 461 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 462 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 463 464 if_put(oifp, &psref); 465 oifp = NULL; 466 467 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 468 in6p->in6p_cksum != -1) { 469 const uint8_t nxt = ip6->ip6_nxt; 470 int off; 471 u_int16_t sum; 472 473 /* compute checksum */ 474 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 475 off = offsetof(struct icmp6_hdr, icmp6_cksum); 476 else 477 off = in6p->in6p_cksum; 478 if (plen < off + 1) { 479 error = EINVAL; 480 goto bad; 481 } 482 off += sizeof(struct ip6_hdr); 483 484 sum = 0; 485 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 486 M_DONTWAIT); 487 if (m == NULL) { 488 error = ENOBUFS; 489 goto bad; 490 } 491 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 492 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 493 M_DONTWAIT); 494 if (m == NULL) { 495 error = ENOBUFS; 496 goto bad; 497 } 498 } 499 500 { 501 struct ifnet *ret_oifp = NULL; 502 503 error = ip6_output(m, optp, &in6p->in6p_route, 0, 504 in6p->in6p_moptions, in6p, &ret_oifp); 505 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 506 if (ret_oifp) 507 icmp6_ifoutstat_inc(ret_oifp, type, code); 508 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 509 } else 510 RIP6_STATINC(RIP6_STAT_OPACKETS); 511 } 512 513 goto freectl; 514 515 bad: 516 if (m) 517 m_freem(m); 518 519 freectl: 520 if (control) { 521 ip6_clearpktopts(&opt, -1); 522 m_freem(control); 523 } 524 if_put(oifp, &psref); 525 curlwp_bindx(bound); 526 return error; 527 } 528 529 /* 530 * Raw IPv6 socket option processing. 531 */ 532 int 533 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 534 { 535 int error = 0; 536 537 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 538 int optval; 539 540 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 541 if (op == PRCO_GETOPT) { 542 optval = 1; 543 error = sockopt_set(sopt, &optval, sizeof(optval)); 544 } else if (op == PRCO_SETOPT) { 545 error = sockopt_getint(sopt, &optval); 546 if (error) 547 goto out; 548 if (optval == 0) 549 error = EINVAL; 550 } 551 552 goto out; 553 } else if (sopt->sopt_level != IPPROTO_IPV6) 554 return ip6_ctloutput(op, so, sopt); 555 556 switch (sopt->sopt_name) { 557 case MRT6_INIT: 558 case MRT6_DONE: 559 case MRT6_ADD_MIF: 560 case MRT6_DEL_MIF: 561 case MRT6_ADD_MFC: 562 case MRT6_DEL_MFC: 563 case MRT6_PIM: 564 if (op == PRCO_SETOPT) 565 error = ip6_mrouter_set(so, sopt); 566 else if (op == PRCO_GETOPT) 567 error = ip6_mrouter_get(so, sopt); 568 else 569 error = EINVAL; 570 break; 571 case IPV6_CHECKSUM: 572 return ip6_raw_ctloutput(op, so, sopt); 573 default: 574 return ip6_ctloutput(op, so, sopt); 575 } 576 out: 577 return error; 578 } 579 580 extern u_long rip6_sendspace; 581 extern u_long rip6_recvspace; 582 583 int 584 rip6_attach(struct socket *so, int proto) 585 { 586 struct in6pcb *in6p; 587 int s, error; 588 589 KASSERT(sotoin6pcb(so) == NULL); 590 sosetlock(so); 591 592 error = kauth_authorize_network(curlwp->l_cred, 593 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 594 KAUTH_ARG(AF_INET6), 595 KAUTH_ARG(SOCK_RAW), 596 KAUTH_ARG(so->so_proto->pr_protocol)); 597 if (error) { 598 return error; 599 } 600 s = splsoftnet(); 601 error = soreserve(so, rip6_sendspace, rip6_recvspace); 602 if (error) { 603 splx(s); 604 return error; 605 } 606 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 607 splx(s); 608 return error; 609 } 610 splx(s); 611 in6p = sotoin6pcb(so); 612 in6p->in6p_ip6.ip6_nxt = proto; 613 in6p->in6p_cksum = -1; 614 615 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 616 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 617 KASSERT(solocked(so)); 618 return error; 619 } 620 621 static void 622 rip6_detach(struct socket *so) 623 { 624 struct in6pcb *in6p = sotoin6pcb(so); 625 626 KASSERT(solocked(so)); 627 KASSERT(in6p != NULL); 628 629 if (so == ip6_mrouter) { 630 ip6_mrouter_done(); 631 } 632 /* xxx: RSVP */ 633 if (in6p->in6p_icmp6filt != NULL) { 634 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 635 in6p->in6p_icmp6filt = NULL; 636 } 637 in6_pcbdetach(in6p); 638 } 639 640 static int 641 rip6_accept(struct socket *so, struct sockaddr *nam) 642 { 643 KASSERT(solocked(so)); 644 645 return EOPNOTSUPP; 646 } 647 648 static int 649 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 650 { 651 struct in6pcb *in6p = sotoin6pcb(so); 652 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 653 struct ifaddr *ifa = NULL; 654 int error = 0; 655 int s; 656 657 KASSERT(solocked(so)); 658 KASSERT(in6p != NULL); 659 KASSERT(nam != NULL); 660 661 if (addr->sin6_len != sizeof(*addr)) 662 return EINVAL; 663 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 664 return EADDRNOTAVAIL; 665 666 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 667 return error; 668 669 /* 670 * we don't support mapped address here, it would confuse 671 * users so reject it 672 */ 673 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 674 return EADDRNOTAVAIL; 675 s = pserialize_read_enter(); 676 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 677 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 678 error = EADDRNOTAVAIL; 679 goto out; 680 } 681 if (ifa && (ifatoia6(ifa))->ia6_flags & 682 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 683 error = EADDRNOTAVAIL; 684 goto out; 685 } 686 687 in6p->in6p_laddr = addr->sin6_addr; 688 error = 0; 689 out: 690 pserialize_read_exit(s); 691 return error; 692 } 693 694 static int 695 rip6_listen(struct socket *so, struct lwp *l) 696 { 697 KASSERT(solocked(so)); 698 699 return EOPNOTSUPP; 700 } 701 702 static int 703 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 704 { 705 struct in6pcb *in6p = sotoin6pcb(so); 706 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 707 struct in6_addr in6a; 708 struct ifnet *ifp = NULL; 709 int scope_ambiguous = 0; 710 int error = 0; 711 struct psref psref; 712 int bound; 713 714 KASSERT(solocked(so)); 715 KASSERT(in6p != NULL); 716 KASSERT(nam != NULL); 717 718 if (IFNET_READER_EMPTY()) 719 return EADDRNOTAVAIL; 720 if (addr->sin6_family != AF_INET6) 721 return EAFNOSUPPORT; 722 723 /* 724 * Application should provide a proper zone ID or the use of 725 * default zone IDs should be enabled. Unfortunately, some 726 * applications do not behave as it should, so we need a 727 * workaround. Even if an appropriate ID is not determined, 728 * we'll see if we can determine the outgoing interface. If we 729 * can, determine the zone ID based on the interface below. 730 */ 731 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 732 scope_ambiguous = 1; 733 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 734 return error; 735 736 bound = curlwp_bind(); 737 /* Source address selection. XXX: need pcblookup? */ 738 error = in6_selectsrc(addr, in6p->in6p_outputopts, 739 in6p->in6p_moptions, &in6p->in6p_route, 740 &in6p->in6p_laddr, &ifp, &psref, &in6a); 741 if (error != 0) 742 goto out; 743 /* XXX: see above */ 744 if (ifp && scope_ambiguous && 745 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 746 goto out; 747 } 748 in6p->in6p_laddr = in6a; 749 in6p->in6p_faddr = addr->sin6_addr; 750 soisconnected(so); 751 out: 752 if_put(ifp, &psref); 753 curlwp_bindx(bound); 754 return error; 755 } 756 757 static int 758 rip6_connect2(struct socket *so, struct socket *so2) 759 { 760 KASSERT(solocked(so)); 761 762 return EOPNOTSUPP; 763 } 764 765 static int 766 rip6_disconnect(struct socket *so) 767 { 768 struct in6pcb *in6p = sotoin6pcb(so); 769 770 KASSERT(solocked(so)); 771 KASSERT(in6p != NULL); 772 773 if ((so->so_state & SS_ISCONNECTED) == 0) 774 return ENOTCONN; 775 776 in6p->in6p_faddr = in6addr_any; 777 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 778 return 0; 779 } 780 781 static int 782 rip6_shutdown(struct socket *so) 783 { 784 KASSERT(solocked(so)); 785 786 /* 787 * Mark the connection as being incapable of futther input. 788 */ 789 socantsendmore(so); 790 return 0; 791 } 792 793 static int 794 rip6_abort(struct socket *so) 795 { 796 KASSERT(solocked(so)); 797 798 soisdisconnected(so); 799 rip6_detach(so); 800 return 0; 801 } 802 803 static int 804 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 805 { 806 return in6_control(so, cmd, nam, ifp); 807 } 808 809 static int 810 rip6_stat(struct socket *so, struct stat *ub) 811 { 812 KASSERT(solocked(so)); 813 814 /* stat: don't bother with a blocksize */ 815 return 0; 816 } 817 818 static int 819 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 820 { 821 KASSERT(solocked(so)); 822 KASSERT(sotoin6pcb(so) != NULL); 823 KASSERT(nam != NULL); 824 825 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 826 return 0; 827 } 828 829 static int 830 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 831 { 832 KASSERT(solocked(so)); 833 KASSERT(sotoin6pcb(so) != NULL); 834 KASSERT(nam != NULL); 835 836 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 837 return 0; 838 } 839 840 static int 841 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 842 { 843 KASSERT(solocked(so)); 844 845 return EOPNOTSUPP; 846 } 847 848 static int 849 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 850 { 851 KASSERT(solocked(so)); 852 853 return EOPNOTSUPP; 854 } 855 856 static int 857 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 858 struct mbuf *control, struct lwp *l) 859 { 860 struct in6pcb *in6p = sotoin6pcb(so); 861 struct sockaddr_in6 tmp; 862 struct sockaddr_in6 *dst; 863 int error = 0; 864 865 KASSERT(solocked(so)); 866 KASSERT(in6p != NULL); 867 KASSERT(m != NULL); 868 869 /* 870 * Ship a packet out. The appropriate raw output 871 * routine handles any messaging necessary. 872 */ 873 874 /* always copy sockaddr to avoid overwrites */ 875 if (so->so_state & SS_ISCONNECTED) { 876 if (nam) { 877 error = EISCONN; 878 goto release; 879 } 880 /* XXX */ 881 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 882 dst = &tmp; 883 } else { 884 if (nam == NULL) { 885 error = ENOTCONN; 886 goto release; 887 } 888 tmp = *(struct sockaddr_in6 *)nam; 889 dst = &tmp; 890 891 if (dst->sin6_family != AF_INET6) { 892 error = EAFNOSUPPORT; 893 goto release; 894 } 895 } 896 error = rip6_output(m, so, dst, control); 897 m = NULL; 898 899 release: 900 if (m) 901 m_freem(m); 902 903 return error; 904 } 905 906 static int 907 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 908 { 909 KASSERT(solocked(so)); 910 911 if (m) 912 m_freem(m); 913 914 return EOPNOTSUPP; 915 } 916 917 static int 918 rip6_purgeif(struct socket *so, struct ifnet *ifp) 919 { 920 921 mutex_enter(softnet_lock); 922 in6_pcbpurgeif0(&raw6cbtable, ifp); 923 #ifdef NET_MPSAFE 924 mutex_exit(softnet_lock); 925 #endif 926 in6_purgeif(ifp); 927 #ifdef NET_MPSAFE 928 mutex_enter(softnet_lock); 929 #endif 930 in6_pcbpurgeif(&raw6cbtable, ifp); 931 mutex_exit(softnet_lock); 932 933 return 0; 934 } 935 936 static int 937 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 938 { 939 940 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 941 } 942 943 static void 944 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 945 { 946 947 sysctl_createv(clog, 0, NULL, NULL, 948 CTLFLAG_PERMANENT, 949 CTLTYPE_NODE, "inet6", NULL, 950 NULL, 0, NULL, 0, 951 CTL_NET, PF_INET6, CTL_EOL); 952 sysctl_createv(clog, 0, NULL, NULL, 953 CTLFLAG_PERMANENT, 954 CTLTYPE_NODE, "raw6", 955 SYSCTL_DESCR("Raw IPv6 settings"), 956 NULL, 0, NULL, 0, 957 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 958 959 sysctl_createv(clog, 0, NULL, NULL, 960 CTLFLAG_PERMANENT, 961 CTLTYPE_STRUCT, "pcblist", 962 SYSCTL_DESCR("Raw IPv6 control block list"), 963 sysctl_inpcblist, 0, &raw6cbtable, 0, 964 CTL_NET, PF_INET6, IPPROTO_RAW, 965 CTL_CREATE, CTL_EOL); 966 sysctl_createv(clog, 0, NULL, NULL, 967 CTLFLAG_PERMANENT, 968 CTLTYPE_STRUCT, "stats", 969 SYSCTL_DESCR("Raw IPv6 statistics"), 970 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 971 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 972 CTL_EOL); 973 } 974 975 PR_WRAP_USRREQS(rip6) 976 #define rip6_attach rip6_attach_wrapper 977 #define rip6_detach rip6_detach_wrapper 978 #define rip6_accept rip6_accept_wrapper 979 #define rip6_bind rip6_bind_wrapper 980 #define rip6_listen rip6_listen_wrapper 981 #define rip6_connect rip6_connect_wrapper 982 #define rip6_connect2 rip6_connect2_wrapper 983 #define rip6_disconnect rip6_disconnect_wrapper 984 #define rip6_shutdown rip6_shutdown_wrapper 985 #define rip6_abort rip6_abort_wrapper 986 #define rip6_ioctl rip6_ioctl_wrapper 987 #define rip6_stat rip6_stat_wrapper 988 #define rip6_peeraddr rip6_peeraddr_wrapper 989 #define rip6_sockaddr rip6_sockaddr_wrapper 990 #define rip6_rcvd rip6_rcvd_wrapper 991 #define rip6_recvoob rip6_recvoob_wrapper 992 #define rip6_send rip6_send_wrapper 993 #define rip6_sendoob rip6_sendoob_wrapper 994 #define rip6_purgeif rip6_purgeif_wrapper 995 996 const struct pr_usrreqs rip6_usrreqs = { 997 .pr_attach = rip6_attach, 998 .pr_detach = rip6_detach, 999 .pr_accept = rip6_accept, 1000 .pr_bind = rip6_bind, 1001 .pr_listen = rip6_listen, 1002 .pr_connect = rip6_connect, 1003 .pr_connect2 = rip6_connect2, 1004 .pr_disconnect = rip6_disconnect, 1005 .pr_shutdown = rip6_shutdown, 1006 .pr_abort = rip6_abort, 1007 .pr_ioctl = rip6_ioctl, 1008 .pr_stat = rip6_stat, 1009 .pr_peeraddr = rip6_peeraddr, 1010 .pr_sockaddr = rip6_sockaddr, 1011 .pr_rcvd = rip6_rcvd, 1012 .pr_recvoob = rip6_recvoob, 1013 .pr_send = rip6_send, 1014 .pr_sendoob = rip6_sendoob, 1015 .pr_purgeif = rip6_purgeif, 1016 }; 1017
Indexes created Wed Sep 24 15:09:51 GMT 2025