raw_ip6.c revision 1.160
1 /* $NetBSD: raw_ip6.c,v 1.160 2018/01/30 14:49:25 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 1.160 2018/01/30 14:49:25 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/ipsec_var.h> 103 #include <netipsec/ipsec_private.h> 104 #include <netipsec/ipsec6.h> 105 #endif 106 107 #include "faith.h" 108 #if defined(NFAITH) && 0 < NFAITH 109 #include <net/if_faith.h> 110 #endif 111 112 extern struct inpcbtable rawcbtable; 113 struct inpcbtable raw6cbtable; 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 static percpu_t *rip6stat_percpu; 121 122 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 123 124 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 125 126 /* 127 * Initialize raw connection block queue. 128 */ 129 void 130 rip6_init(void) 131 { 132 133 sysctl_net_inet6_raw6_setup(NULL); 134 in6_pcbinit(&raw6cbtable, 1, 1); 135 136 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 137 } 138 139 /* 140 * Setup generic address and protocol structures 141 * for raw_input routine, then pass them along with 142 * mbuf chain. 143 */ 144 int 145 rip6_input(struct mbuf **mp, int *offp, int proto) 146 { 147 struct mbuf *m = *mp; 148 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 149 struct inpcb_hdr *inph; 150 struct in6pcb *in6p; 151 struct in6pcb *last = NULL; 152 struct sockaddr_in6 rip6src; 153 struct mbuf *opts = NULL; 154 155 RIP6_STATINC(RIP6_STAT_IPACKETS); 156 157 #if defined(NFAITH) && 0 < NFAITH 158 if (faithprefix(&ip6->ip6_dst)) { 159 /* send icmp6 host unreach? */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 #endif 164 165 /* Be proactive about malicious use of IPv4 mapped address */ 166 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 167 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 168 /* XXX stat */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 174 if (sa6_recoverscope(&rip6src) != 0) { 175 /* XXX: should be impossible. */ 176 m_freem(m); 177 return IPPROTO_DONE; 178 } 179 180 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 181 in6p = (struct in6pcb *)inph; 182 if (in6p->in6p_af != AF_INET6) 183 continue; 184 if (in6p->in6p_ip6.ip6_nxt && 185 in6p->in6p_ip6.ip6_nxt != proto) 186 continue; 187 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 188 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 192 continue; 193 if (in6p->in6p_cksum != -1) { 194 RIP6_STATINC(RIP6_STAT_ISUM); 195 if (in6_cksum(m, proto, *offp, 196 m->m_pkthdr.len - *offp)) { 197 RIP6_STATINC(RIP6_STAT_BADSUM); 198 continue; 199 } 200 } 201 if (last) { 202 struct mbuf *n; 203 204 #ifdef IPSEC 205 /* 206 * Check AH/ESP integrity 207 */ 208 if (!ipsec_used || 209 (ipsec_used && !ipsec6_in_reject(m, last))) 210 #endif 211 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 212 if (last->in6p_flags & IN6P_CONTROLOPTS) 213 ip6_savecontrol(last, &opts, ip6, n); 214 /* strip intermediate headers */ 215 m_adj(n, *offp); 216 if (sbappendaddr(&last->in6p_socket->so_rcv, 217 sin6tosa(&rip6src), n, opts) == 0) { 218 /* should notify about lost packet */ 219 m_freem(n); 220 if (opts) 221 m_freem(opts); 222 RIP6_STATINC(RIP6_STAT_FULLSOCK); 223 } else 224 sorwakeup(last->in6p_socket); 225 opts = NULL; 226 } 227 } 228 last = in6p; 229 } 230 231 #ifdef IPSEC 232 if (ipsec_used && last && ipsec6_in_reject(m, last)) { 233 m_freem(m); 234 IP6_STATDEC(IP6_STAT_DELIVERED); 235 /* do not inject data into pcb */ 236 } else 237 #endif 238 if (last) { 239 if (last->in6p_flags & IN6P_CONTROLOPTS) 240 ip6_savecontrol(last, &opts, ip6, m); 241 /* strip intermediate headers */ 242 m_adj(m, *offp); 243 if (sbappendaddr(&last->in6p_socket->so_rcv, 244 sin6tosa(&rip6src), m, opts) == 0) { 245 m_freem(m); 246 if (opts) 247 m_freem(opts); 248 RIP6_STATINC(RIP6_STAT_FULLSOCK); 249 } else 250 sorwakeup(last->in6p_socket); 251 } else { 252 RIP6_STATINC(RIP6_STAT_NOSOCK); 253 if (m->m_flags & M_MCAST) 254 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 255 if (proto == IPPROTO_NONE) 256 m_freem(m); 257 else { 258 int s; 259 struct ifnet *rcvif = m_get_rcvif(m, &s); 260 const int prvnxt = ip6_get_prevhdr(m, *offp); 261 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 262 m_put_rcvif(rcvif, &s); 263 icmp6_error(m, ICMP6_PARAM_PROB, 264 ICMP6_PARAMPROB_NEXTHEADER, 265 prvnxt); 266 } 267 IP6_STATDEC(IP6_STAT_DELIVERED); 268 } 269 return IPPROTO_DONE; 270 } 271 272 void * 273 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 274 { 275 struct ip6_hdr *ip6; 276 struct ip6ctlparam *ip6cp = NULL; 277 const struct sockaddr_in6 *sa6_src = NULL; 278 void *cmdarg; 279 void (*notify)(struct in6pcb *, int) = in6_rtchange; 280 int nxt; 281 282 if (sa->sa_family != AF_INET6 || 283 sa->sa_len != sizeof(struct sockaddr_in6)) 284 return NULL; 285 286 if ((unsigned)cmd >= PRC_NCMDS) 287 return NULL; 288 if (PRC_IS_REDIRECT(cmd)) 289 notify = in6_rtchange, d = NULL; 290 else if (cmd == PRC_HOSTDEAD) 291 d = NULL; 292 else if (cmd == PRC_MSGSIZE) 293 ; /* special code is present, see below */ 294 else if (inet6ctlerrmap[cmd] == 0) 295 return NULL; 296 297 /* if the parameter is from icmp6, decode it. */ 298 if (d != NULL) { 299 ip6cp = (struct ip6ctlparam *)d; 300 ip6 = ip6cp->ip6c_ip6; 301 cmdarg = ip6cp->ip6c_cmdarg; 302 sa6_src = ip6cp->ip6c_src; 303 nxt = ip6cp->ip6c_nxt; 304 } else { 305 ip6 = NULL; 306 cmdarg = NULL; 307 sa6_src = &sa6_any; 308 nxt = -1; 309 } 310 311 if (ip6 && cmd == PRC_MSGSIZE) { 312 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 313 int valid = 0; 314 struct in6pcb *in6p; 315 316 /* 317 * Check to see if we have a valid raw IPv6 socket 318 * corresponding to the address in the ICMPv6 message 319 * payload, and the protocol (ip6_nxt) meets the socket. 320 * XXX chase extension headers, or pass final nxt value 321 * from icmp6_notify_error() 322 */ 323 in6p = NULL; 324 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 325 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 326 #if 0 327 if (!in6p) { 328 /* 329 * As the use of sendto(2) is fairly popular, 330 * we may want to allow non-connected pcb too. 331 * But it could be too weak against attacks... 332 * We should at least check if the local 333 * address (= s) is really ours. 334 */ 335 in6p = in6_pcblookup_bind(&raw6cbtable, 336 &sa6->sin6_addr, 0, 0); 337 } 338 #endif 339 340 if (in6p && in6p->in6p_ip6.ip6_nxt && 341 in6p->in6p_ip6.ip6_nxt == nxt) 342 valid++; 343 344 /* 345 * Depending on the value of "valid" and routing table 346 * size (mtudisc_{hi,lo}wat), we will: 347 * - recalculate the new MTU and create the 348 * corresponding routing entry, or 349 * - ignore the MTU change notification. 350 */ 351 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 352 353 /* 354 * regardless of if we called icmp6_mtudisc_update(), 355 * we need to call in6_pcbnotify(), to notify path MTU 356 * change to the userland (RFC3542), because some 357 * unconnected sockets may share the same destination 358 * and want to know the path MTU. 359 */ 360 } 361 362 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 363 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 364 return NULL; 365 } 366 367 /* 368 * Generate IPv6 header and pass packet to ip6_output. 369 * Tack on options user may have setup with control call. 370 */ 371 int 372 rip6_output(struct mbuf *m, struct socket * const so, 373 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 374 { 375 struct in6_addr *dst; 376 struct ip6_hdr *ip6; 377 struct in6pcb *in6p; 378 u_int plen = m->m_pkthdr.len; 379 int error = 0; 380 struct ip6_pktopts opt, *optp = NULL; 381 struct ifnet *oifp = NULL; 382 int type, code; /* for ICMPv6 output statistics only */ 383 int scope_ambiguous = 0; 384 int bound = curlwp_bind(); 385 struct psref psref; 386 387 in6p = sotoin6pcb(so); 388 389 dst = &dstsock->sin6_addr; 390 if (control) { 391 if ((error = ip6_setpktopts(control, &opt, 392 in6p->in6p_outputopts, 393 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 394 goto bad; 395 } 396 optp = &opt; 397 } else 398 optp = in6p->in6p_outputopts; 399 400 /* 401 * Check and convert scope zone ID into internal form. 402 * XXX: we may still need to determine the zone later. 403 */ 404 if (!(so->so_state & SS_ISCONNECTED)) { 405 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 406 scope_ambiguous = 1; 407 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 408 goto bad; 409 } 410 411 /* 412 * For an ICMPv6 packet, we should know its type and code 413 * to update statistics. 414 */ 415 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 416 struct icmp6_hdr *icmp6; 417 if (m->m_len < sizeof(struct icmp6_hdr) && 418 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 419 error = ENOBUFS; 420 goto bad; 421 } 422 icmp6 = mtod(m, struct icmp6_hdr *); 423 type = icmp6->icmp6_type; 424 code = icmp6->icmp6_code; 425 } else { 426 type = 0; 427 code = 0; 428 } 429 430 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 431 if (!m) { 432 error = ENOBUFS; 433 goto bad; 434 } 435 ip6 = mtod(m, struct ip6_hdr *); 436 437 /* 438 * Next header might not be ICMP6 but use its pseudo header anyway. 439 */ 440 ip6->ip6_dst = *dst; 441 442 /* 443 * Source address selection. 444 */ 445 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 446 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 447 if (error != 0) 448 goto bad; 449 450 if (oifp && scope_ambiguous) { 451 /* 452 * Application should provide a proper zone ID or the use of 453 * default zone IDs should be enabled. Unfortunately, some 454 * applications do not behave as it should, so we need a 455 * workaround. Even if an appropriate ID is not determined 456 * (when it's required), if we can determine the outgoing 457 * interface. determine the zone ID based on the interface. 458 */ 459 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 460 if (error != 0) 461 goto bad; 462 } 463 ip6->ip6_dst = dstsock->sin6_addr; 464 465 /* fill in the rest of the IPv6 header fields */ 466 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 467 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 468 ip6->ip6_vfc |= IPV6_VERSION; 469 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 470 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 471 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 472 473 if_put(oifp, &psref); 474 oifp = NULL; 475 476 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 477 in6p->in6p_cksum != -1) { 478 int off; 479 u_int16_t sum; 480 481 /* compute checksum */ 482 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 483 off = offsetof(struct icmp6_hdr, icmp6_cksum); 484 else 485 off = in6p->in6p_cksum; 486 if (plen < off + 1) { 487 error = EINVAL; 488 goto bad; 489 } 490 off += sizeof(struct ip6_hdr); 491 492 sum = 0; 493 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 494 M_DONTWAIT); 495 if (m == NULL) { 496 error = ENOBUFS; 497 goto bad; 498 } 499 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 500 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 501 M_DONTWAIT); 502 if (m == NULL) { 503 error = ENOBUFS; 504 goto bad; 505 } 506 } 507 508 { 509 struct ifnet *ret_oifp = NULL; 510 511 error = ip6_output(m, optp, &in6p->in6p_route, 0, 512 in6p->in6p_moptions, in6p, &ret_oifp); 513 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 514 if (ret_oifp) 515 icmp6_ifoutstat_inc(ret_oifp, type, code); 516 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 517 } else 518 RIP6_STATINC(RIP6_STAT_OPACKETS); 519 } 520 521 goto freectl; 522 523 bad: 524 if (m) 525 m_freem(m); 526 527 freectl: 528 if (control) { 529 ip6_clearpktopts(&opt, -1); 530 m_freem(control); 531 } 532 if_put(oifp, &psref); 533 curlwp_bindx(bound); 534 return error; 535 } 536 537 /* 538 * Raw IPv6 socket option processing. 539 */ 540 int 541 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 542 { 543 int error = 0; 544 545 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 546 int optval; 547 548 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 549 if (op == PRCO_GETOPT) { 550 optval = 1; 551 error = sockopt_set(sopt, &optval, sizeof(optval)); 552 } else if (op == PRCO_SETOPT) { 553 error = sockopt_getint(sopt, &optval); 554 if (error) 555 goto out; 556 if (optval == 0) 557 error = EINVAL; 558 } 559 560 goto out; 561 } else if (sopt->sopt_level != IPPROTO_IPV6) 562 return ip6_ctloutput(op, so, sopt); 563 564 switch (sopt->sopt_name) { 565 case MRT6_INIT: 566 case MRT6_DONE: 567 case MRT6_ADD_MIF: 568 case MRT6_DEL_MIF: 569 case MRT6_ADD_MFC: 570 case MRT6_DEL_MFC: 571 case MRT6_PIM: 572 if (op == PRCO_SETOPT) 573 error = ip6_mrouter_set(so, sopt); 574 else if (op == PRCO_GETOPT) 575 error = ip6_mrouter_get(so, sopt); 576 else 577 error = EINVAL; 578 break; 579 case IPV6_CHECKSUM: 580 return ip6_raw_ctloutput(op, so, sopt); 581 default: 582 return ip6_ctloutput(op, so, sopt); 583 } 584 out: 585 return error; 586 } 587 588 extern u_long rip6_sendspace; 589 extern u_long rip6_recvspace; 590 591 int 592 rip6_attach(struct socket *so, int proto) 593 { 594 struct in6pcb *in6p; 595 int s, error; 596 597 KASSERT(sotoin6pcb(so) == NULL); 598 sosetlock(so); 599 600 error = kauth_authorize_network(curlwp->l_cred, 601 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 602 KAUTH_ARG(AF_INET6), 603 KAUTH_ARG(SOCK_RAW), 604 KAUTH_ARG(so->so_proto->pr_protocol)); 605 if (error) { 606 return error; 607 } 608 s = splsoftnet(); 609 error = soreserve(so, rip6_sendspace, rip6_recvspace); 610 if (error) { 611 splx(s); 612 return error; 613 } 614 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 615 splx(s); 616 return error; 617 } 618 splx(s); 619 in6p = sotoin6pcb(so); 620 in6p->in6p_ip6.ip6_nxt = proto; 621 in6p->in6p_cksum = -1; 622 623 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 624 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 625 KASSERT(solocked(so)); 626 return error; 627 } 628 629 static void 630 rip6_detach(struct socket *so) 631 { 632 struct in6pcb *in6p = sotoin6pcb(so); 633 634 KASSERT(solocked(so)); 635 KASSERT(in6p != NULL); 636 637 if (so == ip6_mrouter) { 638 ip6_mrouter_done(); 639 } 640 /* xxx: RSVP */ 641 if (in6p->in6p_icmp6filt != NULL) { 642 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 643 in6p->in6p_icmp6filt = NULL; 644 } 645 in6_pcbdetach(in6p); 646 } 647 648 static int 649 rip6_accept(struct socket *so, struct sockaddr *nam) 650 { 651 KASSERT(solocked(so)); 652 653 return EOPNOTSUPP; 654 } 655 656 static int 657 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 658 { 659 struct in6pcb *in6p = sotoin6pcb(so); 660 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 661 struct ifaddr *ifa = NULL; 662 int error = 0; 663 int s; 664 665 KASSERT(solocked(so)); 666 KASSERT(in6p != NULL); 667 KASSERT(nam != NULL); 668 669 if (addr->sin6_len != sizeof(*addr)) 670 return EINVAL; 671 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 672 return EADDRNOTAVAIL; 673 674 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 675 return error; 676 677 /* 678 * we don't support mapped address here, it would confuse 679 * users so reject it 680 */ 681 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 682 return EADDRNOTAVAIL; 683 s = pserialize_read_enter(); 684 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 685 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 686 error = EADDRNOTAVAIL; 687 goto out; 688 } 689 if (ifa && (ifatoia6(ifa))->ia6_flags & 690 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 691 error = EADDRNOTAVAIL; 692 goto out; 693 } 694 695 in6p->in6p_laddr = addr->sin6_addr; 696 error = 0; 697 out: 698 pserialize_read_exit(s); 699 return error; 700 } 701 702 static int 703 rip6_listen(struct socket *so, struct lwp *l) 704 { 705 KASSERT(solocked(so)); 706 707 return EOPNOTSUPP; 708 } 709 710 static int 711 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 712 { 713 struct in6pcb *in6p = sotoin6pcb(so); 714 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 715 struct in6_addr in6a; 716 struct ifnet *ifp = NULL; 717 int scope_ambiguous = 0; 718 int error = 0; 719 struct psref psref; 720 int bound; 721 722 KASSERT(solocked(so)); 723 KASSERT(in6p != NULL); 724 KASSERT(nam != NULL); 725 726 if (IFNET_READER_EMPTY()) 727 return EADDRNOTAVAIL; 728 if (addr->sin6_family != AF_INET6) 729 return EAFNOSUPPORT; 730 731 /* 732 * Application should provide a proper zone ID or the use of 733 * default zone IDs should be enabled. Unfortunately, some 734 * applications do not behave as it should, so we need a 735 * workaround. Even if an appropriate ID is not determined, 736 * we'll see if we can determine the outgoing interface. If we 737 * can, determine the zone ID based on the interface below. 738 */ 739 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 740 scope_ambiguous = 1; 741 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 742 return error; 743 744 bound = curlwp_bind(); 745 /* Source address selection. XXX: need pcblookup? */ 746 error = in6_selectsrc(addr, in6p->in6p_outputopts, 747 in6p->in6p_moptions, &in6p->in6p_route, 748 &in6p->in6p_laddr, &ifp, &psref, &in6a); 749 if (error != 0) 750 goto out; 751 /* XXX: see above */ 752 if (ifp && scope_ambiguous && 753 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 754 goto out; 755 } 756 in6p->in6p_laddr = in6a; 757 in6p->in6p_faddr = addr->sin6_addr; 758 soisconnected(so); 759 out: 760 if_put(ifp, &psref); 761 curlwp_bindx(bound); 762 return error; 763 } 764 765 static int 766 rip6_connect2(struct socket *so, struct socket *so2) 767 { 768 KASSERT(solocked(so)); 769 770 return EOPNOTSUPP; 771 } 772 773 static int 774 rip6_disconnect(struct socket *so) 775 { 776 struct in6pcb *in6p = sotoin6pcb(so); 777 778 KASSERT(solocked(so)); 779 KASSERT(in6p != NULL); 780 781 if ((so->so_state & SS_ISCONNECTED) == 0) 782 return ENOTCONN; 783 784 in6p->in6p_faddr = in6addr_any; 785 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 786 return 0; 787 } 788 789 static int 790 rip6_shutdown(struct socket *so) 791 { 792 KASSERT(solocked(so)); 793 794 /* 795 * Mark the connection as being incapable of futther input. 796 */ 797 socantsendmore(so); 798 return 0; 799 } 800 801 static int 802 rip6_abort(struct socket *so) 803 { 804 KASSERT(solocked(so)); 805 806 soisdisconnected(so); 807 rip6_detach(so); 808 return 0; 809 } 810 811 static int 812 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 813 { 814 return in6_control(so, cmd, nam, ifp); 815 } 816 817 static int 818 rip6_stat(struct socket *so, struct stat *ub) 819 { 820 KASSERT(solocked(so)); 821 822 /* stat: don't bother with a blocksize */ 823 return 0; 824 } 825 826 static int 827 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 828 { 829 KASSERT(solocked(so)); 830 KASSERT(sotoin6pcb(so) != NULL); 831 KASSERT(nam != NULL); 832 833 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 834 return 0; 835 } 836 837 static int 838 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 839 { 840 KASSERT(solocked(so)); 841 KASSERT(sotoin6pcb(so) != NULL); 842 KASSERT(nam != NULL); 843 844 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 845 return 0; 846 } 847 848 static int 849 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 850 { 851 KASSERT(solocked(so)); 852 853 return EOPNOTSUPP; 854 } 855 856 static int 857 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 858 { 859 KASSERT(solocked(so)); 860 861 return EOPNOTSUPP; 862 } 863 864 static int 865 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 866 struct mbuf *control, struct lwp *l) 867 { 868 struct in6pcb *in6p = sotoin6pcb(so); 869 struct sockaddr_in6 tmp; 870 struct sockaddr_in6 *dst; 871 int error = 0; 872 873 KASSERT(solocked(so)); 874 KASSERT(in6p != NULL); 875 KASSERT(m != NULL); 876 877 /* 878 * Ship a packet out. The appropriate raw output 879 * routine handles any messaging necessary. 880 */ 881 882 /* always copy sockaddr to avoid overwrites */ 883 if (so->so_state & SS_ISCONNECTED) { 884 if (nam) { 885 error = EISCONN; 886 goto release; 887 } 888 /* XXX */ 889 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 890 dst = &tmp; 891 } else { 892 if (nam == NULL) { 893 error = ENOTCONN; 894 goto release; 895 } 896 tmp = *(struct sockaddr_in6 *)nam; 897 dst = &tmp; 898 899 if (dst->sin6_family != AF_INET6) { 900 error = EAFNOSUPPORT; 901 goto release; 902 } 903 } 904 error = rip6_output(m, so, dst, control); 905 m = NULL; 906 907 release: 908 if (m) 909 m_freem(m); 910 911 return error; 912 } 913 914 static int 915 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 916 { 917 KASSERT(solocked(so)); 918 919 if (m) 920 m_freem(m); 921 922 return EOPNOTSUPP; 923 } 924 925 static int 926 rip6_purgeif(struct socket *so, struct ifnet *ifp) 927 { 928 929 mutex_enter(softnet_lock); 930 in6_pcbpurgeif0(&raw6cbtable, ifp); 931 #ifdef NET_MPSAFE 932 mutex_exit(softnet_lock); 933 #endif 934 in6_purgeif(ifp); 935 #ifdef NET_MPSAFE 936 mutex_enter(softnet_lock); 937 #endif 938 in6_pcbpurgeif(&raw6cbtable, ifp); 939 mutex_exit(softnet_lock); 940 941 return 0; 942 } 943 944 static int 945 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 946 { 947 948 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 949 } 950 951 static void 952 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 953 { 954 955 sysctl_createv(clog, 0, NULL, NULL, 956 CTLFLAG_PERMANENT, 957 CTLTYPE_NODE, "inet6", NULL, 958 NULL, 0, NULL, 0, 959 CTL_NET, PF_INET6, CTL_EOL); 960 sysctl_createv(clog, 0, NULL, NULL, 961 CTLFLAG_PERMANENT, 962 CTLTYPE_NODE, "raw6", 963 SYSCTL_DESCR("Raw IPv6 settings"), 964 NULL, 0, NULL, 0, 965 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 966 967 sysctl_createv(clog, 0, NULL, NULL, 968 CTLFLAG_PERMANENT, 969 CTLTYPE_STRUCT, "pcblist", 970 SYSCTL_DESCR("Raw IPv6 control block list"), 971 sysctl_inpcblist, 0, &raw6cbtable, 0, 972 CTL_NET, PF_INET6, IPPROTO_RAW, 973 CTL_CREATE, CTL_EOL); 974 sysctl_createv(clog, 0, NULL, NULL, 975 CTLFLAG_PERMANENT, 976 CTLTYPE_STRUCT, "stats", 977 SYSCTL_DESCR("Raw IPv6 statistics"), 978 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 979 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 980 CTL_EOL); 981 } 982 983 PR_WRAP_USRREQS(rip6) 984 #define rip6_attach rip6_attach_wrapper 985 #define rip6_detach rip6_detach_wrapper 986 #define rip6_accept rip6_accept_wrapper 987 #define rip6_bind rip6_bind_wrapper 988 #define rip6_listen rip6_listen_wrapper 989 #define rip6_connect rip6_connect_wrapper 990 #define rip6_connect2 rip6_connect2_wrapper 991 #define rip6_disconnect rip6_disconnect_wrapper 992 #define rip6_shutdown rip6_shutdown_wrapper 993 #define rip6_abort rip6_abort_wrapper 994 #define rip6_ioctl rip6_ioctl_wrapper 995 #define rip6_stat rip6_stat_wrapper 996 #define rip6_peeraddr rip6_peeraddr_wrapper 997 #define rip6_sockaddr rip6_sockaddr_wrapper 998 #define rip6_rcvd rip6_rcvd_wrapper 999 #define rip6_recvoob rip6_recvoob_wrapper 1000 #define rip6_send rip6_send_wrapper 1001 #define rip6_sendoob rip6_sendoob_wrapper 1002 #define rip6_purgeif rip6_purgeif_wrapper 1003 1004 const struct pr_usrreqs rip6_usrreqs = { 1005 .pr_attach = rip6_attach, 1006 .pr_detach = rip6_detach, 1007 .pr_accept = rip6_accept, 1008 .pr_bind = rip6_bind, 1009 .pr_listen = rip6_listen, 1010 .pr_connect = rip6_connect, 1011 .pr_connect2 = rip6_connect2, 1012 .pr_disconnect = rip6_disconnect, 1013 .pr_shutdown = rip6_shutdown, 1014 .pr_abort = rip6_abort, 1015 .pr_ioctl = rip6_ioctl, 1016 .pr_stat = rip6_stat, 1017 .pr_peeraddr = rip6_peeraddr, 1018 .pr_sockaddr = rip6_sockaddr, 1019 .pr_rcvd = rip6_rcvd, 1020 .pr_recvoob = rip6_recvoob, 1021 .pr_send = rip6_send, 1022 .pr_sendoob = rip6_sendoob, 1023 .pr_purgeif = rip6_purgeif, 1024 }; 1025
Indexes created Mon Sep 22 13:09:51 GMT 2025