raw_ip6.c revision 1.111.2.2
1 /* $NetBSD: raw_ip6.c,v 1.111.2.2 2013/08/28 15:21:48 rmind 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 1.111.2.2 2013/08/28 15:21:48 rmind Exp $"); 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/sysctl.h> 71 #include <sys/kmem.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/socketvar.h> 76 #include <sys/errno.h> 77 #include <sys/systm.h> 78 #include <sys/proc.h> 79 #include <sys/kauth.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/if_types.h> 84 #include <net/net_stats.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/ip.h> 89 #define __INPCB_PRIVATE 90 #include <netinet/in_pcb.h> 91 92 #include <netinet/ip6.h> 93 #include <netinet6/ip6_var.h> 94 #include <netinet6/ip6_private.h> 95 #include <netinet6/ip6_mroute.h> 96 #include <netinet/icmp6.h> 97 #include <netinet6/icmp6_private.h> 98 #include <netinet6/in6_pcb.h> 99 #include <netinet6/nd6.h> 100 #include <netinet6/ip6protosw.h> 101 #include <netinet6/scope6_var.h> 102 #include <netinet6/raw_ip6.h> 103 104 #ifdef IPSEC 105 #include <netipsec/ipsec.h> 106 #include <netipsec/ipsec_var.h> 107 #include <netipsec/ipsec_private.h> 108 #include <netipsec/ipsec6.h> 109 #endif 110 111 #include "faith.h" 112 #if defined(NFAITH) && 0 < NFAITH 113 #include <net/if_faith.h> 114 #endif 115 116 extern struct inpcbtable rawcbtable; 117 inpcbtable_t *raw6cbtable; 118 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 119 120 /* 121 * Raw interface to IP6 protocol. 122 */ 123 124 static percpu_t *rip6stat_percpu; 125 126 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 127 128 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 129 130 /* 131 * Initialize raw connection block queue. 132 */ 133 void 134 rip6_init(void) 135 { 136 sysctl_net_inet6_raw6_setup(NULL); 137 raw6cbtable = in6_pcbinit(1, 1, 0); 138 139 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 140 } 141 142 /* 143 * Setup generic address and protocol structures 144 * for raw_input routine, then pass them along with 145 * mbuf chain. 146 */ 147 int 148 rip6_input(struct mbuf **mp, int *offp, int proto) 149 { 150 struct mbuf *m = *mp; 151 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 152 struct inpcb_hdr *inph; 153 struct in6pcb *in6p; 154 struct in6pcb *last = NULL; 155 struct sockaddr_in6 rip6src; 156 struct mbuf *opts = NULL; 157 158 RIP6_STATINC(RIP6_STAT_IPACKETS); 159 160 #if defined(NFAITH) && 0 < NFAITH 161 if (faithprefix(&ip6->ip6_dst)) { 162 /* send icmp6 host unreach? */ 163 m_freem(m); 164 return IPPROTO_DONE; 165 } 166 #endif 167 168 /* Be proactive about malicious use of IPv4 mapped address */ 169 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 170 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 171 /* XXX stat */ 172 m_freem(m); 173 return IPPROTO_DONE; 174 } 175 176 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 177 if (sa6_recoverscope(&rip6src) != 0) { 178 /* XXX: should be impossible. */ 179 m_freem(m); 180 return IPPROTO_DONE; 181 } 182 183 CIRCLEQ_FOREACH(inph, &raw6cbtable->inpt_queue, inph_queue) { 184 in6p = (struct in6pcb *)inph; 185 if (in6p->in6p_af != AF_INET6) 186 continue; 187 if (in6p->in6p_ip6.ip6_nxt && 188 in6p->in6p_ip6.ip6_nxt != proto) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 192 continue; 193 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 194 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 195 continue; 196 if (in6p->in6p_cksum != -1) { 197 RIP6_STATINC(RIP6_STAT_ISUM); 198 if (in6_cksum(m, proto, *offp, 199 m->m_pkthdr.len - *offp)) { 200 RIP6_STATINC(RIP6_STAT_BADSUM); 201 continue; 202 } 203 } 204 if (last) { 205 struct mbuf *n; 206 207 #ifdef IPSEC 208 /* 209 * Check AH/ESP integrity 210 */ 211 if (!ipsec6_in_reject(m,last)) 212 #endif /* IPSEC */ 213 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 214 if (last->in6p_flags & IN6P_CONTROLOPTS) 215 ip6_savecontrol(last, &opts, ip6, n); 216 /* strip intermediate headers */ 217 m_adj(n, *offp); 218 if (sbappendaddr(&last->in6p_socket->so_rcv, 219 (struct sockaddr *)&rip6src, n, opts) == 0) { 220 /* should notify about lost packet */ 221 m_freem(n); 222 if (opts) 223 m_freem(opts); 224 RIP6_STATINC(RIP6_STAT_FULLSOCK); 225 } else 226 sorwakeup(last->in6p_socket); 227 opts = NULL; 228 } 229 } 230 last = in6p; 231 } 232 #ifdef IPSEC 233 if (last && ipsec6_in_reject(m, last)) { 234 m_freem(m); 235 /* 236 * XXX ipsec6_in_reject update stat if there is an error 237 * so we just need to update stats by hand in the case of last is 238 * NULL 239 */ 240 if (!last) 241 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); 242 IP6_STATDEC(IP6_STAT_DELIVERED); 243 /* do not inject data into pcb */ 244 } else 245 #endif /* IPSEC */ 246 if (last) { 247 if (last->in6p_flags & IN6P_CONTROLOPTS) 248 ip6_savecontrol(last, &opts, ip6, m); 249 /* strip intermediate headers */ 250 m_adj(m, *offp); 251 if (sbappendaddr(&last->in6p_socket->so_rcv, 252 (struct sockaddr *)&rip6src, m, opts) == 0) { 253 m_freem(m); 254 if (opts) 255 m_freem(opts); 256 RIP6_STATINC(RIP6_STAT_FULLSOCK); 257 } else 258 sorwakeup(last->in6p_socket); 259 } else { 260 RIP6_STATINC(RIP6_STAT_NOSOCK); 261 if (m->m_flags & M_MCAST) 262 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 263 if (proto == IPPROTO_NONE) 264 m_freem(m); 265 else { 266 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 267 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 268 icmp6_error(m, ICMP6_PARAM_PROB, 269 ICMP6_PARAMPROB_NEXTHEADER, 270 prvnxtp - mtod(m, u_int8_t *)); 271 } 272 IP6_STATDEC(IP6_STAT_DELIVERED); 273 } 274 return IPPROTO_DONE; 275 } 276 277 void * 278 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 279 { 280 struct ip6_hdr *ip6; 281 struct ip6ctlparam *ip6cp = NULL; 282 const struct sockaddr_in6 *sa6_src = NULL; 283 void *cmdarg; 284 void (*notify)(struct in6pcb *, int) = in6_rtchange; 285 int nxt; 286 287 if (sa->sa_family != AF_INET6 || 288 sa->sa_len != sizeof(struct sockaddr_in6)) 289 return NULL; 290 291 if ((unsigned)cmd >= PRC_NCMDS) 292 return NULL; 293 if (PRC_IS_REDIRECT(cmd)) 294 notify = in6_rtchange, d = NULL; 295 else if (cmd == PRC_HOSTDEAD) 296 d = NULL; 297 else if (cmd == PRC_MSGSIZE) 298 ; /* special code is present, see below */ 299 else if (inet6ctlerrmap[cmd] == 0) 300 return NULL; 301 302 /* if the parameter is from icmp6, decode it. */ 303 if (d != NULL) { 304 ip6cp = (struct ip6ctlparam *)d; 305 ip6 = ip6cp->ip6c_ip6; 306 cmdarg = ip6cp->ip6c_cmdarg; 307 sa6_src = ip6cp->ip6c_src; 308 nxt = ip6cp->ip6c_nxt; 309 } else { 310 ip6 = NULL; 311 cmdarg = NULL; 312 sa6_src = &sa6_any; 313 nxt = -1; 314 } 315 316 if (ip6 && cmd == PRC_MSGSIZE) { 317 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 318 int valid = 0; 319 struct in6pcb *in6p; 320 321 /* 322 * Check to see if we have a valid raw IPv6 socket 323 * corresponding to the address in the ICMPv6 message 324 * payload, and the protocol (ip6_nxt) meets the socket. 325 * XXX chase extension headers, or pass final nxt value 326 * from icmp6_notify_error() 327 */ 328 in6p = NULL; 329 in6p = in6_pcblookup_connect(raw6cbtable, &sa6->sin6_addr, 0, 330 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 331 #if 0 332 if (!in6p) { 333 /* 334 * As the use of sendto(2) is fairly popular, 335 * we may want to allow non-connected pcb too. 336 * But it could be too weak against attacks... 337 * We should at least check if the local 338 * address (= s) is really ours. 339 */ 340 in6p = in6_pcblookup_bind(raw6cbtable, 341 &sa6->sin6_addr, 0, 0); 342 } 343 #endif 344 345 if (in6p && in6p->in6p_ip6.ip6_nxt && 346 in6p->in6p_ip6.ip6_nxt == nxt) 347 valid++; 348 349 /* 350 * Depending on the value of "valid" and routing table 351 * size (mtudisc_{hi,lo}wat), we will: 352 * - recalculate the new MTU and create the 353 * corresponding routing entry, or 354 * - ignore the MTU change notification. 355 */ 356 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 357 358 /* 359 * regardless of if we called icmp6_mtudisc_update(), 360 * we need to call in6_pcbnotify(), to notify path MTU 361 * change to the userland (RFC3542), because some 362 * unconnected sockets may share the same destination 363 * and want to know the path MTU. 364 */ 365 } 366 367 (void) in6_pcbnotify(raw6cbtable, sa, 0, 368 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 369 return NULL; 370 } 371 372 /* 373 * Generate IPv6 header and pass packet to ip6_output. 374 * Tack on options user may have setup with control call. 375 */ 376 int 377 rip6_output(struct mbuf *m, struct socket * const so, 378 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 379 { 380 struct in6_addr *dst; 381 struct ip6_hdr *ip6; 382 struct in6pcb *in6p; 383 u_int plen = m->m_pkthdr.len; 384 int error = 0; 385 struct ip6_pktopts opt, *optp = NULL; 386 struct ifnet *oifp = NULL; 387 int type, code; /* for ICMPv6 output statistics only */ 388 int scope_ambiguous = 0; 389 struct in6_addr *in6a; 390 391 in6p = sotoin6pcb(so); 392 393 dst = &dstsock->sin6_addr; 394 if (control) { 395 if ((error = ip6_setpktopts(control, &opt, 396 in6p->in6p_outputopts, 397 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 398 goto bad; 399 } 400 optp = &opt; 401 } else 402 optp = in6p->in6p_outputopts; 403 404 /* 405 * Check and convert scope zone ID into internal form. 406 * XXX: we may still need to determine the zone later. 407 */ 408 if (!(so->so_state & SS_ISCONNECTED)) { 409 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 410 scope_ambiguous = 1; 411 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 412 goto bad; 413 } 414 415 /* 416 * For an ICMPv6 packet, we should know its type and code 417 * to update statistics. 418 */ 419 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 420 struct icmp6_hdr *icmp6; 421 if (m->m_len < sizeof(struct icmp6_hdr) && 422 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 423 error = ENOBUFS; 424 goto bad; 425 } 426 icmp6 = mtod(m, struct icmp6_hdr *); 427 type = icmp6->icmp6_type; 428 code = icmp6->icmp6_code; 429 } else { 430 type = 0; 431 code = 0; 432 } 433 434 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 435 if (!m) { 436 error = ENOBUFS; 437 goto bad; 438 } 439 ip6 = mtod(m, struct ip6_hdr *); 440 441 /* 442 * Next header might not be ICMP6 but use its pseudo header anyway. 443 */ 444 ip6->ip6_dst = *dst; 445 446 /* 447 * Source address selection. 448 */ 449 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 450 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, 451 &error)) == 0) { 452 if (error == 0) 453 error = EADDRNOTAVAIL; 454 goto bad; 455 } 456 ip6->ip6_src = *in6a; 457 458 if (oifp && scope_ambiguous) { 459 /* 460 * Application should provide a proper zone ID or the use of 461 * default zone IDs should be enabled. Unfortunately, some 462 * applications do not behave as it should, so we need a 463 * workaround. Even if an appropriate ID is not determined 464 * (when it's required), if we can determine the outgoing 465 * interface. determine the zone ID based on the interface. 466 */ 467 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 468 if (error != 0) 469 goto bad; 470 } 471 ip6->ip6_dst = dstsock->sin6_addr; 472 473 /* fill in the rest of the IPv6 header fields */ 474 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 475 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 476 ip6->ip6_vfc |= IPV6_VERSION; 477 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 478 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 479 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 480 481 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 482 in6p->in6p_cksum != -1) { 483 int off; 484 u_int16_t sum; 485 486 /* compute checksum */ 487 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 488 off = offsetof(struct icmp6_hdr, icmp6_cksum); 489 else 490 off = in6p->in6p_cksum; 491 if (plen < off + 1) { 492 error = EINVAL; 493 goto bad; 494 } 495 off += sizeof(struct ip6_hdr); 496 497 sum = 0; 498 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 499 M_DONTWAIT); 500 if (m == NULL) { 501 error = ENOBUFS; 502 goto bad; 503 } 504 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 505 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 506 M_DONTWAIT); 507 if (m == NULL) { 508 error = ENOBUFS; 509 goto bad; 510 } 511 } 512 513 error = ip6_output(m, optp, &in6p->in6p_route, 0, 514 in6p->in6p_moptions, so, &oifp); 515 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 516 if (oifp) 517 icmp6_ifoutstat_inc(oifp, type, code); 518 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 519 } else 520 RIP6_STATINC(RIP6_STAT_OPACKETS); 521 522 goto freectl; 523 524 bad: 525 if (m) 526 m_freem(m); 527 528 freectl: 529 if (control) { 530 ip6_clearpktopts(&opt, -1); 531 m_freem(control); 532 } 533 return error; 534 } 535 536 /* 537 * Raw IPv6 socket option processing. 538 */ 539 int 540 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 541 { 542 int error = 0; 543 544 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 545 int optval; 546 547 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 548 if (op == PRCO_GETOPT) { 549 optval = 1; 550 error = sockopt_set(sopt, &optval, sizeof(optval)); 551 } else if (op == PRCO_SETOPT) { 552 error = sockopt_getint(sopt, &optval); 553 if (error) 554 goto out; 555 if (optval == 0) 556 error = EINVAL; 557 } 558 559 goto out; 560 } else if (sopt->sopt_level != IPPROTO_IPV6) 561 return ip6_ctloutput(op, so, sopt); 562 563 switch (sopt->sopt_name) { 564 case MRT6_INIT: 565 case MRT6_DONE: 566 case MRT6_ADD_MIF: 567 case MRT6_DEL_MIF: 568 case MRT6_ADD_MFC: 569 case MRT6_DEL_MFC: 570 case MRT6_PIM: 571 if (op == PRCO_SETOPT) 572 error = ip6_mrouter_set(so, sopt); 573 else if (op == PRCO_GETOPT) 574 error = ip6_mrouter_get(so, sopt); 575 else 576 error = EINVAL; 577 break; 578 case IPV6_CHECKSUM: 579 return ip6_raw_ctloutput(op, so, sopt); 580 default: 581 return ip6_ctloutput(op, so, sopt); 582 } 583 out: 584 return error; 585 } 586 587 extern u_long rip6_sendspace; 588 extern u_long rip6_recvspace; 589 590 int 591 rip6_attach(struct socket *so, int proto) 592 { 593 struct in6pcb *in6p; 594 int s, error; 595 596 KASSERT(sotoin6pcb(so) == NULL); 597 sosetlock(so); 598 solock(so); 599 600 error = kauth_authorize_network(curlwp->l_cred, 601 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 602 KAUTH_ARG(AF_INET6), KAUTH_ARG(SOCK_RAW), 603 KAUTH_ARG(so->so_proto->pr_protocol)); 604 if (error) { 605 sounlock(so); 606 return error; 607 } 608 609 s = splsoftnet(); 610 error = soreserve(so, rip6_sendspace, rip6_recvspace); 611 if (error) { 612 goto out; 613 } 614 if ((error = in6_pcballoc(so, raw6cbtable)) != 0) { 615 goto out; 616 } 617 618 in6p = sotoin6pcb(so); 619 in6p->in6p_ip6.ip6_nxt = proto; 620 in6p->in6p_cksum = -1; 621 622 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 623 if (in6p->in6p_icmp6filt == NULL) { 624 in6_pcbdetach(in6p); 625 error = ENOMEM; 626 goto out; 627 } 628 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 629 out: 630 sounlock(so); 631 splx(s); 632 return error; 633 } 634 635 static void 636 rip6_detach(struct socket *so) 637 { 638 struct in6pcb *in6p = sotoin6pcb(so); 639 640 KASSERT(solocked(so)); 641 KASSERT(in6p != NULL); 642 643 if (so == ip6_mrouter) { 644 ip6_mrouter_done(); 645 } 646 /* xxx: RSVP */ 647 if (in6p->in6p_icmp6filt != NULL) { 648 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 649 in6p->in6p_icmp6filt = NULL; 650 } 651 in6_pcbdetach(in6p); 652 } 653 654 int 655 rip6_usrreq(struct socket *so, int req, struct mbuf *m, 656 struct mbuf *nam, struct mbuf *control, struct lwp *l) 657 { 658 struct in6pcb *in6p = sotoin6pcb(so); 659 int error = 0; 660 661 KASSERT(req != PRU_ATTACH); 662 KASSERT(req != PRU_DETACH); 663 664 if (req == PRU_CONTROL) 665 return in6_control(so, (u_long)m, (void *)nam, 666 (struct ifnet *)control, l); 667 668 if (req == PRU_PURGEIF) { 669 mutex_enter(softnet_lock); 670 in6_pcbpurgeif0(raw6cbtable, (struct ifnet *)control); 671 in6_purgeif((struct ifnet *)control); 672 in6_pcbpurgeif(raw6cbtable, (struct ifnet *)control); 673 mutex_exit(softnet_lock); 674 return 0; 675 } 676 677 switch (req) { 678 case PRU_DISCONNECT: 679 if ((so->so_state & SS_ISCONNECTED) == 0) { 680 error = ENOTCONN; 681 break; 682 } 683 in6p->in6p_faddr = in6addr_any; 684 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 685 break; 686 687 case PRU_ABORT: 688 soisdisconnected(so); 689 rip6_detach(so); 690 break; 691 692 case PRU_BIND: 693 { 694 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 695 struct ifaddr *ia = NULL; 696 697 if (nam->m_len != sizeof(*addr)) { 698 error = EINVAL; 699 break; 700 } 701 if (!IFNET_FIRST() || addr->sin6_family != AF_INET6) { 702 error = EADDRNOTAVAIL; 703 break; 704 } 705 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 706 break; 707 708 /* 709 * we don't support mapped address here, it would confuse 710 * users so reject it 711 */ 712 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 713 error = EADDRNOTAVAIL; 714 break; 715 } 716 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 717 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 718 error = EADDRNOTAVAIL; 719 break; 720 } 721 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 722 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 723 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 724 error = EADDRNOTAVAIL; 725 break; 726 } 727 in6p->in6p_laddr = addr->sin6_addr; 728 break; 729 } 730 731 case PRU_CONNECT: 732 { 733 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 734 struct in6_addr *in6a = NULL; 735 struct ifnet *ifp = NULL; 736 int scope_ambiguous = 0; 737 738 if (nam->m_len != sizeof(*addr)) { 739 error = EINVAL; 740 break; 741 } 742 if (!IFNET_FIRST()) { 743 error = EADDRNOTAVAIL; 744 break; 745 } 746 if (addr->sin6_family != AF_INET6) { 747 error = EAFNOSUPPORT; 748 break; 749 } 750 751 /* 752 * Application should provide a proper zone ID or the use of 753 * default zone IDs should be enabled. Unfortunately, some 754 * applications do not behave as it should, so we need a 755 * workaround. Even if an appropriate ID is not determined, 756 * we'll see if we can determine the outgoing interface. If we 757 * can, determine the zone ID based on the interface below. 758 */ 759 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 760 scope_ambiguous = 1; 761 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 762 return error; 763 764 /* Source address selection. XXX: need pcblookup? */ 765 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 766 in6p->in6p_moptions, &in6p->in6p_route, 767 &in6p->in6p_laddr, &ifp, &error); 768 if (in6a == NULL) { 769 if (error == 0) 770 error = EADDRNOTAVAIL; 771 break; 772 } 773 /* XXX: see above */ 774 if (ifp && scope_ambiguous && 775 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 776 break; 777 } 778 in6p->in6p_laddr = *in6a; 779 in6p->in6p_faddr = addr->sin6_addr; 780 soisconnected(so); 781 break; 782 } 783 784 case PRU_CONNECT2: 785 error = EOPNOTSUPP; 786 break; 787 788 /* 789 * Mark the connection as being incapable of futther input. 790 */ 791 case PRU_SHUTDOWN: 792 socantsendmore(so); 793 break; 794 /* 795 * Ship a packet out. The appropriate raw output 796 * routine handles any messaging necessary. 797 */ 798 case PRU_SEND: 799 { 800 struct sockaddr_in6 tmp; 801 struct sockaddr_in6 *dst; 802 803 /* always copy sockaddr to avoid overwrites */ 804 if (so->so_state & SS_ISCONNECTED) { 805 if (nam) { 806 error = EISCONN; 807 break; 808 } 809 /* XXX */ 810 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 811 dst = &tmp; 812 } else { 813 if (nam == NULL) { 814 error = ENOTCONN; 815 break; 816 } 817 if (nam->m_len != sizeof(tmp)) { 818 error = EINVAL; 819 break; 820 } 821 822 tmp = *mtod(nam, struct sockaddr_in6 *); 823 dst = &tmp; 824 825 if (dst->sin6_family != AF_INET6) { 826 error = EAFNOSUPPORT; 827 break; 828 } 829 } 830 error = rip6_output(m, so, dst, control); 831 m = NULL; 832 break; 833 } 834 835 case PRU_SENSE: 836 /* 837 * stat: don't bother with a blocksize 838 */ 839 return 0; 840 /* 841 * Not supported. 842 */ 843 case PRU_RCVOOB: 844 case PRU_RCVD: 845 case PRU_LISTEN: 846 case PRU_ACCEPT: 847 case PRU_SENDOOB: 848 error = EOPNOTSUPP; 849 break; 850 851 case PRU_SOCKADDR: 852 in6_setsockaddr(in6p, nam); 853 break; 854 855 case PRU_PEERADDR: 856 in6_setpeeraddr(in6p, nam); 857 break; 858 859 default: 860 panic("rip6_usrreq"); 861 } 862 if (m != NULL) 863 m_freem(m); 864 return error; 865 } 866 867 PR_WRAP_USRREQ(rip6_usrreq) 868 869 #define rip6_usrreq rip6_usrreq_wrapper 870 871 const struct pr_usrreqs rip6_usrreqs = { 872 .pr_attach = rip6_attach, 873 .pr_detach = rip6_detach, 874 .pr_generic = rip6_usrreq, 875 }; 876 877 static int 878 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 879 { 880 881 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 882 } 883 884 static void 885 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 886 { 887 888 sysctl_createv(clog, 0, NULL, NULL, 889 CTLFLAG_PERMANENT, 890 CTLTYPE_NODE, "net", NULL, 891 NULL, 0, NULL, 0, 892 CTL_NET, CTL_EOL); 893 sysctl_createv(clog, 0, NULL, NULL, 894 CTLFLAG_PERMANENT, 895 CTLTYPE_NODE, "inet6", NULL, 896 NULL, 0, NULL, 0, 897 CTL_NET, PF_INET6, CTL_EOL); 898 sysctl_createv(clog, 0, NULL, NULL, 899 CTLFLAG_PERMANENT, 900 CTLTYPE_NODE, "raw6", 901 SYSCTL_DESCR("Raw IPv6 settings"), 902 NULL, 0, NULL, 0, 903 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 904 905 sysctl_createv(clog, 0, NULL, NULL, 906 CTLFLAG_PERMANENT, 907 CTLTYPE_STRUCT, "pcblist", 908 SYSCTL_DESCR("Raw IPv6 control block list"), 909 sysctl_inpcblist, 0, raw6cbtable, 0, 910 CTL_NET, PF_INET6, IPPROTO_RAW, 911 CTL_CREATE, CTL_EOL); 912 sysctl_createv(clog, 0, NULL, NULL, 913 CTLFLAG_PERMANENT, 914 CTLTYPE_STRUCT, "stats", 915 SYSCTL_DESCR("Raw IPv6 statistics"), 916 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 917 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 918 CTL_EOL); 919 } 920
Indexes created Tue Sep 30 20:09:53 GMT 2025