1 /* $NetBSD: raw_ip6.c,v 1.102 2009/01/03 03:43:23 yamt 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 1.102 2009/01/03 03:43:23 yamt Exp $"); 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/sysctl.h> 71 #include <sys/malloc.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/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/ip6_private.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/icmp6_private.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 #include <netinet6/scope6_var.h> 98 #include <netinet6/raw_ip6.h> 99 100 #ifdef IPSEC 101 #include <netinet6/ipsec.h> 102 #include <netinet6/ipsec_private.h> 103 #endif /* IPSEC */ 104 105 #ifdef FAST_IPSEC 106 #include <netipsec/ipsec.h> 107 #include <netipsec/ipsec_var.h> 108 #include <netipsec/ipsec_private.h> 109 #include <netipsec/ipsec6.h> 110 #endif 111 112 #include "faith.h" 113 #if defined(NFAITH) && 0 < NFAITH 114 #include <net/if_faith.h> 115 #endif 116 117 extern struct inpcbtable rawcbtable; 118 struct inpcbtable raw6cbtable; 119 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 120 121 /* 122 * Raw interface to IP6 protocol. 123 */ 124 125 static percpu_t *rip6stat_percpu; 126 127 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 128 129 /* 130 * Initialize raw connection block queue. 131 */ 132 void 133 rip6_init() 134 { 135 136 in6_pcbinit(&raw6cbtable, 1, 1); 137 138 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 139 } 140 141 /* 142 * Setup generic address and protocol structures 143 * for raw_input routine, then pass them along with 144 * mbuf chain. 145 */ 146 int 147 rip6_input(struct mbuf **mp, int *offp, int proto) 148 { 149 struct mbuf *m = *mp; 150 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 151 struct inpcb_hdr *inph; 152 struct in6pcb *in6p; 153 struct in6pcb *last = NULL; 154 struct sockaddr_in6 rip6src; 155 struct mbuf *opts = NULL; 156 157 RIP6_STATINC(RIP6_STAT_IPACKETS); 158 159 #if defined(NFAITH) && 0 < NFAITH 160 if (faithprefix(&ip6->ip6_dst)) { 161 /* send icmp6 host unreach? */ 162 m_freem(m); 163 return IPPROTO_DONE; 164 } 165 #endif 166 167 /* Be proactive about malicious use of IPv4 mapped address */ 168 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 169 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 170 /* XXX stat */ 171 m_freem(m); 172 return IPPROTO_DONE; 173 } 174 175 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 176 if (sa6_recoverscope(&rip6src) != 0) { 177 /* XXX: should be impossible. */ 178 m_freem(m); 179 return IPPROTO_DONE; 180 } 181 182 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 183 in6p = (struct in6pcb *)inph; 184 if (in6p->in6p_af != AF_INET6) 185 continue; 186 if (in6p->in6p_ip6.ip6_nxt && 187 in6p->in6p_ip6.ip6_nxt != proto) 188 continue; 189 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 190 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 191 continue; 192 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 193 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 194 continue; 195 if (in6p->in6p_cksum != -1) { 196 RIP6_STATINC(RIP6_STAT_ISUM); 197 if (in6_cksum(m, proto, *offp, 198 m->m_pkthdr.len - *offp)) { 199 RIP6_STATINC(RIP6_STAT_BADSUM); 200 continue; 201 } 202 } 203 if (last) { 204 struct mbuf *n; 205 206 #ifdef IPSEC 207 /* 208 * Check AH/ESP integrity. 209 */ 210 if (ipsec6_in_reject(m, last)) { 211 IPSEC6_STATINC(IPSEC_STAT_IN_INVAL); 212 /* do not inject data into pcb */ 213 } else 214 #endif /* IPSEC */ 215 #ifdef FAST_IPSEC 216 /* 217 * Check AH/ESP integrity 218 */ 219 if (!ipsec6_in_reject(m,last)) 220 #endif /* FAST_IPSEC */ 221 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 222 if (last->in6p_flags & IN6P_CONTROLOPTS) 223 ip6_savecontrol(last, &opts, ip6, n); 224 /* strip intermediate headers */ 225 m_adj(n, *offp); 226 if (sbappendaddr(&last->in6p_socket->so_rcv, 227 (struct sockaddr *)&rip6src, n, opts) == 0) { 228 /* should notify about lost packet */ 229 m_freem(n); 230 if (opts) 231 m_freem(opts); 232 RIP6_STATINC(RIP6_STAT_FULLSOCK); 233 } else 234 sorwakeup(last->in6p_socket); 235 opts = NULL; 236 } 237 } 238 last = in6p; 239 } 240 #ifdef IPSEC 241 /* 242 * Check AH/ESP integrity. 243 */ 244 if (last && ipsec6_in_reject(m, last)) { 245 m_freem(m); 246 IPSEC6_STATINC(IPSEC_STAT_IN_INVAL); 247 IP6_STATDEC(IP6_STAT_DELIVERED); 248 /* do not inject data into pcb */ 249 } else 250 #endif /* IPSEC */ 251 #ifdef FAST_IPSEC 252 if (last && ipsec6_in_reject(m, last)) { 253 m_freem(m); 254 /* 255 * XXX ipsec6_in_reject update stat if there is an error 256 * so we just need to update stats by hand in the case of last is 257 * NULL 258 */ 259 if (!last) 260 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); 261 IP6_STATDEC(IP6_STAT_DELIVERED); 262 /* do not inject data into pcb */ 263 } else 264 #endif /* FAST_IPSEC */ 265 if (last) { 266 if (last->in6p_flags & IN6P_CONTROLOPTS) 267 ip6_savecontrol(last, &opts, ip6, m); 268 /* strip intermediate headers */ 269 m_adj(m, *offp); 270 if (sbappendaddr(&last->in6p_socket->so_rcv, 271 (struct sockaddr *)&rip6src, m, opts) == 0) { 272 m_freem(m); 273 if (opts) 274 m_freem(opts); 275 RIP6_STATINC(RIP6_STAT_FULLSOCK); 276 } else 277 sorwakeup(last->in6p_socket); 278 } else { 279 RIP6_STATINC(RIP6_STAT_NOSOCK); 280 if (m->m_flags & M_MCAST) 281 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 282 if (proto == IPPROTO_NONE) 283 m_freem(m); 284 else { 285 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 286 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 287 icmp6_error(m, ICMP6_PARAM_PROB, 288 ICMP6_PARAMPROB_NEXTHEADER, 289 prvnxtp - mtod(m, u_int8_t *)); 290 } 291 IP6_STATDEC(IP6_STAT_DELIVERED); 292 } 293 return IPPROTO_DONE; 294 } 295 296 void * 297 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 298 { 299 struct ip6_hdr *ip6; 300 struct ip6ctlparam *ip6cp = NULL; 301 const struct sockaddr_in6 *sa6_src = NULL; 302 void *cmdarg; 303 void (*notify)(struct in6pcb *, int) = in6_rtchange; 304 int nxt; 305 306 if (sa->sa_family != AF_INET6 || 307 sa->sa_len != sizeof(struct sockaddr_in6)) 308 return NULL; 309 310 if ((unsigned)cmd >= PRC_NCMDS) 311 return NULL; 312 if (PRC_IS_REDIRECT(cmd)) 313 notify = in6_rtchange, d = NULL; 314 else if (cmd == PRC_HOSTDEAD) 315 d = NULL; 316 else if (cmd == PRC_MSGSIZE) 317 ; /* special code is present, see below */ 318 else if (inet6ctlerrmap[cmd] == 0) 319 return NULL; 320 321 /* if the parameter is from icmp6, decode it. */ 322 if (d != NULL) { 323 ip6cp = (struct ip6ctlparam *)d; 324 ip6 = ip6cp->ip6c_ip6; 325 cmdarg = ip6cp->ip6c_cmdarg; 326 sa6_src = ip6cp->ip6c_src; 327 nxt = ip6cp->ip6c_nxt; 328 } else { 329 ip6 = NULL; 330 cmdarg = NULL; 331 sa6_src = &sa6_any; 332 nxt = -1; 333 } 334 335 if (ip6 && cmd == PRC_MSGSIZE) { 336 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 337 int valid = 0; 338 struct in6pcb *in6p; 339 340 /* 341 * Check to see if we have a valid raw IPv6 socket 342 * corresponding to the address in the ICMPv6 message 343 * payload, and the protocol (ip6_nxt) meets the socket. 344 * XXX chase extension headers, or pass final nxt value 345 * from icmp6_notify_error() 346 */ 347 in6p = NULL; 348 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 349 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 350 #if 0 351 if (!in6p) { 352 /* 353 * As the use of sendto(2) is fairly popular, 354 * we may want to allow non-connected pcb too. 355 * But it could be too weak against attacks... 356 * We should at least check if the local 357 * address (= s) is really ours. 358 */ 359 in6p = in6_pcblookup_bind(&raw6cbtable, 360 &sa6->sin6_addr, 0, 0); 361 } 362 #endif 363 364 if (in6p && in6p->in6p_ip6.ip6_nxt && 365 in6p->in6p_ip6.ip6_nxt == nxt) 366 valid++; 367 368 /* 369 * Depending on the value of "valid" and routing table 370 * size (mtudisc_{hi,lo}wat), we will: 371 * - recalculate the new MTU and create the 372 * corresponding routing entry, or 373 * - ignore the MTU change notification. 374 */ 375 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 376 377 /* 378 * regardless of if we called icmp6_mtudisc_update(), 379 * we need to call in6_pcbnotify(), to notify path MTU 380 * change to the userland (RFC3542), because some 381 * unconnected sockets may share the same destination 382 * and want to know the path MTU. 383 */ 384 } 385 386 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 387 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 388 return NULL; 389 } 390 391 /* 392 * Generate IPv6 header and pass packet to ip6_output. 393 * Tack on options user may have setup with control call. 394 */ 395 int 396 rip6_output(struct mbuf *m, struct socket *so, struct sockaddr_in6 *dstsock, 397 struct mbuf *control) 398 { 399 struct in6_addr *dst; 400 struct ip6_hdr *ip6; 401 struct in6pcb *in6p; 402 u_int plen = m->m_pkthdr.len; 403 int error = 0; 404 struct ip6_pktopts opt, *optp = NULL; 405 struct ifnet *oifp = NULL; 406 int type, code; /* for ICMPv6 output statistics only */ 407 int priv = 0; 408 int scope_ambiguous = 0; 409 struct in6_addr *in6a; 410 411 in6p = sotoin6pcb(so); 412 413 priv = 0; 414 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 415 KAUTH_GENERIC_ISSUSER, NULL)) 416 priv = 1; 417 418 dst = &dstsock->sin6_addr; 419 if (control) { 420 if ((error = ip6_setpktopts(control, &opt, 421 in6p->in6p_outputopts, 422 priv, so->so_proto->pr_protocol)) != 0) { 423 goto bad; 424 } 425 optp = &opt; 426 } else 427 optp = in6p->in6p_outputopts; 428 429 /* 430 * Check and convert scope zone ID into internal form. 431 * XXX: we may still need to determine the zone later. 432 */ 433 if (!(so->so_state & SS_ISCONNECTED)) { 434 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 435 scope_ambiguous = 1; 436 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 437 goto bad; 438 } 439 440 /* 441 * For an ICMPv6 packet, we should know its type and code 442 * to update statistics. 443 */ 444 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 445 struct icmp6_hdr *icmp6; 446 if (m->m_len < sizeof(struct icmp6_hdr) && 447 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 448 error = ENOBUFS; 449 goto bad; 450 } 451 icmp6 = mtod(m, struct icmp6_hdr *); 452 type = icmp6->icmp6_type; 453 code = icmp6->icmp6_code; 454 } else { 455 type = 0; 456 code = 0; 457 } 458 459 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 460 if (!m) { 461 error = ENOBUFS; 462 goto bad; 463 } 464 ip6 = mtod(m, struct ip6_hdr *); 465 466 /* 467 * Next header might not be ICMP6 but use its pseudo header anyway. 468 */ 469 ip6->ip6_dst = *dst; 470 471 /* 472 * Source address selection. 473 */ 474 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 475 (struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp, 476 &error)) == 0) { 477 if (error == 0) 478 error = EADDRNOTAVAIL; 479 goto bad; 480 } 481 ip6->ip6_src = *in6a; 482 483 if (oifp && scope_ambiguous) { 484 /* 485 * Application should provide a proper zone ID or the use of 486 * default zone IDs should be enabled. Unfortunately, some 487 * applications do not behave as it should, so we need a 488 * workaround. Even if an appropriate ID is not determined 489 * (when it's required), if we can determine the outgoing 490 * interface. determine the zone ID based on the interface. 491 */ 492 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 493 if (error != 0) 494 goto bad; 495 } 496 ip6->ip6_dst = dstsock->sin6_addr; 497 498 /* fill in the rest of the IPv6 header fields */ 499 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 500 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 501 ip6->ip6_vfc |= IPV6_VERSION; 502 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 503 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 504 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 505 506 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 507 in6p->in6p_cksum != -1) { 508 int off; 509 u_int16_t sum; 510 511 /* compute checksum */ 512 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 513 off = offsetof(struct icmp6_hdr, icmp6_cksum); 514 else 515 off = in6p->in6p_cksum; 516 if (plen < off + 1) { 517 error = EINVAL; 518 goto bad; 519 } 520 off += sizeof(struct ip6_hdr); 521 522 sum = 0; 523 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 524 M_DONTWAIT); 525 if (m == NULL) { 526 error = ENOBUFS; 527 goto bad; 528 } 529 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 530 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 531 M_DONTWAIT); 532 if (m == NULL) { 533 error = ENOBUFS; 534 goto bad; 535 } 536 } 537 538 error = ip6_output(m, optp, &in6p->in6p_route, 0, 539 in6p->in6p_moptions, so, &oifp); 540 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 541 if (oifp) 542 icmp6_ifoutstat_inc(oifp, type, code); 543 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 544 } else 545 RIP6_STATINC(RIP6_STAT_OPACKETS); 546 547 goto freectl; 548 549 bad: 550 if (m) 551 m_freem(m); 552 553 freectl: 554 if (control) { 555 ip6_clearpktopts(&opt, -1); 556 m_freem(control); 557 } 558 return error; 559 } 560 561 /* 562 * Raw IPv6 socket option processing. 563 */ 564 int 565 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 566 { 567 int error = 0; 568 569 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 570 int optval; 571 572 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 573 if (op == PRCO_GETOPT) { 574 optval = 1; 575 error = sockopt_set(sopt, &optval, sizeof(optval)); 576 } else if (op == PRCO_SETOPT) { 577 error = sockopt_getint(sopt, &optval); 578 if (error) 579 goto out; 580 if (optval == 0) 581 error = EINVAL; 582 } 583 584 goto out; 585 } else if (sopt->sopt_level != IPPROTO_IPV6) 586 return ip6_ctloutput(op, so, sopt); 587 588 switch (sopt->sopt_name) { 589 case MRT6_INIT: 590 case MRT6_DONE: 591 case MRT6_ADD_MIF: 592 case MRT6_DEL_MIF: 593 case MRT6_ADD_MFC: 594 case MRT6_DEL_MFC: 595 case MRT6_PIM: 596 if (op == PRCO_SETOPT) 597 error = ip6_mrouter_set(so, sopt); 598 else if (op == PRCO_GETOPT) 599 error = ip6_mrouter_get(so, sopt); 600 else 601 error = EINVAL; 602 break; 603 case IPV6_CHECKSUM: 604 return ip6_raw_ctloutput(op, so, sopt); 605 default: 606 return ip6_ctloutput(op, so, sopt); 607 } 608 out: 609 return error; 610 } 611 612 extern u_long rip6_sendspace; 613 extern u_long rip6_recvspace; 614 615 int 616 rip6_usrreq(struct socket *so, int req, struct mbuf *m, 617 struct mbuf *nam, struct mbuf *control, struct lwp *l) 618 { 619 struct in6pcb *in6p = sotoin6pcb(so); 620 int s; 621 int error = 0; 622 int priv; 623 624 priv = 0; 625 if (l && !kauth_authorize_generic(l->l_cred, 626 KAUTH_GENERIC_ISSUSER, NULL)) 627 priv++; 628 629 if (req == PRU_CONTROL) 630 return in6_control(so, (u_long)m, (void *)nam, 631 (struct ifnet *)control, l); 632 633 if (req == PRU_PURGEIF) { 634 mutex_enter(softnet_lock); 635 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 636 in6_purgeif((struct ifnet *)control); 637 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 638 mutex_exit(softnet_lock); 639 return 0; 640 } 641 642 switch (req) { 643 case PRU_ATTACH: 644 sosetlock(so); 645 if (in6p != NULL) 646 panic("rip6_attach"); 647 if (!priv) { 648 error = EACCES; 649 break; 650 } 651 s = splsoftnet(); 652 error = soreserve(so, rip6_sendspace, rip6_recvspace); 653 if (error != 0) { 654 splx(s); 655 break; 656 } 657 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 658 splx(s); 659 break; 660 } 661 splx(s); 662 in6p = sotoin6pcb(so); 663 in6p->in6p_ip6.ip6_nxt = (long)nam; 664 in6p->in6p_cksum = -1; 665 666 in6p->in6p_icmp6filt = malloc(sizeof(struct icmp6_filter), 667 M_PCB, M_NOWAIT); 668 if (in6p->in6p_icmp6filt == NULL) { 669 in6_pcbdetach(in6p); 670 error = ENOMEM; 671 break; 672 } 673 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 674 break; 675 676 case PRU_DISCONNECT: 677 if ((so->so_state & SS_ISCONNECTED) == 0) { 678 error = ENOTCONN; 679 break; 680 } 681 in6p->in6p_faddr = in6addr_any; 682 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 683 break; 684 685 case PRU_ABORT: 686 soisdisconnected(so); 687 /* Fallthrough */ 688 case PRU_DETACH: 689 if (in6p == NULL) 690 panic("rip6_detach"); 691 if (so == ip6_mrouter) 692 ip6_mrouter_done(); 693 /* xxx: RSVP */ 694 if (in6p->in6p_icmp6filt != NULL) { 695 free(in6p->in6p_icmp6filt, M_PCB); 696 in6p->in6p_icmp6filt = NULL; 697 } 698 in6_pcbdetach(in6p); 699 break; 700 701 case PRU_BIND: 702 { 703 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 704 struct ifaddr *ia = NULL; 705 706 if (nam->m_len != sizeof(*addr)) { 707 error = EINVAL; 708 break; 709 } 710 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 711 error = EADDRNOTAVAIL; 712 break; 713 } 714 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 715 break; 716 717 /* 718 * we don't support mapped address here, it would confuse 719 * users so reject it 720 */ 721 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 722 error = EADDRNOTAVAIL; 723 break; 724 } 725 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 726 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 727 error = EADDRNOTAVAIL; 728 break; 729 } 730 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 731 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 732 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 733 error = EADDRNOTAVAIL; 734 break; 735 } 736 in6p->in6p_laddr = addr->sin6_addr; 737 break; 738 } 739 740 case PRU_CONNECT: 741 { 742 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 743 struct in6_addr *in6a = NULL; 744 struct ifnet *ifp = NULL; 745 int scope_ambiguous = 0; 746 747 if (nam->m_len != sizeof(*addr)) { 748 error = EINVAL; 749 break; 750 } 751 if (TAILQ_EMPTY(&ifnet)) { 752 error = EADDRNOTAVAIL; 753 break; 754 } 755 if (addr->sin6_family != AF_INET6) { 756 error = EAFNOSUPPORT; 757 break; 758 } 759 760 /* 761 * Application should provide a proper zone ID or the use of 762 * default zone IDs should be enabled. Unfortunately, some 763 * applications do not behave as it should, so we need a 764 * workaround. Even if an appropriate ID is not determined, 765 * we'll see if we can determine the outgoing interface. If we 766 * can, determine the zone ID based on the interface below. 767 */ 768 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 769 scope_ambiguous = 1; 770 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 771 return error; 772 773 /* Source address selection. XXX: need pcblookup? */ 774 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 775 in6p->in6p_moptions, (struct route *)&in6p->in6p_route, 776 &in6p->in6p_laddr, &ifp, &error); 777 if (in6a == NULL) { 778 if (error == 0) 779 error = EADDRNOTAVAIL; 780 break; 781 } 782 /* XXX: see above */ 783 if (ifp && scope_ambiguous && 784 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 785 break; 786 } 787 in6p->in6p_laddr = *in6a; 788 in6p->in6p_faddr = addr->sin6_addr; 789 soisconnected(so); 790 break; 791 } 792 793 case PRU_CONNECT2: 794 error = EOPNOTSUPP; 795 break; 796 797 /* 798 * Mark the connection as being incapable of futther input. 799 */ 800 case PRU_SHUTDOWN: 801 socantsendmore(so); 802 break; 803 /* 804 * Ship a packet out. The appropriate raw output 805 * routine handles any messaging necessary. 806 */ 807 case PRU_SEND: 808 { 809 struct sockaddr_in6 tmp; 810 struct sockaddr_in6 *dst; 811 812 /* always copy sockaddr to avoid overwrites */ 813 if (so->so_state & SS_ISCONNECTED) { 814 if (nam) { 815 error = EISCONN; 816 break; 817 } 818 /* XXX */ 819 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 820 dst = &tmp; 821 } else { 822 if (nam == NULL) { 823 error = ENOTCONN; 824 break; 825 } 826 if (nam->m_len != sizeof(tmp)) { 827 error = EINVAL; 828 break; 829 } 830 831 tmp = *mtod(nam, struct sockaddr_in6 *); 832 dst = &tmp; 833 834 if (dst->sin6_family != AF_INET6) { 835 error = EAFNOSUPPORT; 836 break; 837 } 838 } 839 error = rip6_output(m, so, dst, control); 840 m = NULL; 841 break; 842 } 843 844 case PRU_SENSE: 845 /* 846 * stat: don't bother with a blocksize 847 */ 848 return 0; 849 /* 850 * Not supported. 851 */ 852 case PRU_RCVOOB: 853 case PRU_RCVD: 854 case PRU_LISTEN: 855 case PRU_ACCEPT: 856 case PRU_SENDOOB: 857 error = EOPNOTSUPP; 858 break; 859 860 case PRU_SOCKADDR: 861 in6_setsockaddr(in6p, nam); 862 break; 863 864 case PRU_PEERADDR: 865 in6_setpeeraddr(in6p, nam); 866 break; 867 868 default: 869 panic("rip6_usrreq"); 870 } 871 if (m != NULL) 872 m_freem(m); 873 return error; 874 } 875 876 static int 877 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 878 { 879 880 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 881 } 882 883 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 884 { 885 886 sysctl_createv(clog, 0, NULL, NULL, 887 CTLFLAG_PERMANENT, 888 CTLTYPE_NODE, "net", NULL, 889 NULL, 0, NULL, 0, 890 CTL_NET, CTL_EOL); 891 sysctl_createv(clog, 0, NULL, NULL, 892 CTLFLAG_PERMANENT, 893 CTLTYPE_NODE, "inet6", NULL, 894 NULL, 0, NULL, 0, 895 CTL_NET, PF_INET6, CTL_EOL); 896 sysctl_createv(clog, 0, NULL, NULL, 897 CTLFLAG_PERMANENT, 898 CTLTYPE_NODE, "raw6", 899 SYSCTL_DESCR("Raw IPv6 settings"), 900 NULL, 0, NULL, 0, 901 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 902 903 sysctl_createv(clog, 0, NULL, NULL, 904 CTLFLAG_PERMANENT, 905 CTLTYPE_STRUCT, "pcblist", 906 SYSCTL_DESCR("Raw IPv6 control block list"), 907 sysctl_inpcblist, 0, &raw6cbtable, 0, 908 CTL_NET, PF_INET6, IPPROTO_RAW, 909 CTL_CREATE, CTL_EOL); 910 sysctl_createv(clog, 0, NULL, NULL, 911 CTLFLAG_PERMANENT, 912 CTLTYPE_STRUCT, "stats", 913 SYSCTL_DESCR("Raw IPv6 statistics"), 914 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 915 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 916 CTL_EOL); 917 } 918