raw_ip6.c revision 1.168
1 /* $NetBSD: raw_ip6.c,v 1.168 2018/04/12 07:28:10 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 1.168 2018/04/12 07:28:10 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/ipsec6.h> 104 #endif 105 106 #include "faith.h" 107 #if defined(NFAITH) && 0 < NFAITH 108 #include <net/if_faith.h> 109 #endif 110 111 extern struct inpcbtable rawcbtable; 112 struct inpcbtable raw6cbtable; 113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 114 115 /* 116 * Raw interface to IP6 protocol. 117 */ 118 119 static percpu_t *rip6stat_percpu; 120 121 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 122 123 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 124 125 /* 126 * Initialize raw connection block queue. 127 */ 128 void 129 rip6_init(void) 130 { 131 132 sysctl_net_inet6_raw6_setup(NULL); 133 in6_pcbinit(&raw6cbtable, 1, 1); 134 135 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 136 } 137 138 /* 139 * Setup generic address and protocol structures 140 * for raw_input routine, then pass them along with 141 * mbuf chain. 142 */ 143 int 144 rip6_input(struct mbuf **mp, int *offp, int proto) 145 { 146 struct mbuf *m = *mp; 147 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 148 struct inpcb_hdr *inph; 149 struct in6pcb *in6p; 150 struct in6pcb *last = NULL; 151 struct sockaddr_in6 rip6src; 152 struct mbuf *n, *opts = NULL; 153 154 RIP6_STATINC(RIP6_STAT_IPACKETS); 155 156 #if defined(NFAITH) && 0 < NFAITH 157 if (faithprefix(&ip6->ip6_dst)) { 158 /* send icmp6 host unreach? */ 159 m_freem(m); 160 return IPPROTO_DONE; 161 } 162 #endif 163 164 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 165 if (sa6_recoverscope(&rip6src) != 0) { 166 /* XXX: should be impossible. */ 167 m_freem(m); 168 return IPPROTO_DONE; 169 } 170 171 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 172 in6p = (struct in6pcb *)inph; 173 if (in6p->in6p_af != AF_INET6) 174 continue; 175 if (in6p->in6p_ip6.ip6_nxt && 176 in6p->in6p_ip6.ip6_nxt != proto) 177 continue; 178 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 179 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 180 continue; 181 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 182 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 183 continue; 184 if (in6p->in6p_cksum != -1) { 185 RIP6_STATINC(RIP6_STAT_ISUM); 186 if (in6_cksum(m, proto, *offp, 187 m->m_pkthdr.len - *offp)) { 188 RIP6_STATINC(RIP6_STAT_BADSUM); 189 continue; 190 } 191 } 192 193 if (last == NULL) { 194 ; 195 } 196 #ifdef IPSEC 197 else if (ipsec_used && ipsec_in_reject(m, last)) { 198 /* do not inject data into pcb */ 199 } 200 #endif 201 else if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 202 if (last->in6p_flags & IN6P_CONTROLOPTS) 203 ip6_savecontrol(last, &opts, ip6, n); 204 /* strip intermediate headers */ 205 m_adj(n, *offp); 206 if (sbappendaddr(&last->in6p_socket->so_rcv, 207 sin6tosa(&rip6src), n, opts) == 0) { 208 soroverflow(last->in6p_socket); 209 m_freem(n); 210 if (opts) 211 m_freem(opts); 212 RIP6_STATINC(RIP6_STAT_FULLSOCK); 213 } else { 214 sorwakeup(last->in6p_socket); 215 } 216 opts = NULL; 217 } 218 219 last = in6p; 220 } 221 222 #ifdef IPSEC 223 if (ipsec_used && last && ipsec_in_reject(m, last)) { 224 m_freem(m); 225 IP6_STATDEC(IP6_STAT_DELIVERED); 226 /* do not inject data into pcb */ 227 } else 228 #endif 229 if (last) { 230 if (last->in6p_flags & IN6P_CONTROLOPTS) 231 ip6_savecontrol(last, &opts, ip6, m); 232 /* strip intermediate headers */ 233 m_adj(m, *offp); 234 if (sbappendaddr(&last->in6p_socket->so_rcv, 235 sin6tosa(&rip6src), m, opts) == 0) { 236 soroverflow(last->in6p_socket); 237 m_freem(m); 238 if (opts) 239 m_freem(opts); 240 RIP6_STATINC(RIP6_STAT_FULLSOCK); 241 } else 242 sorwakeup(last->in6p_socket); 243 } else { 244 RIP6_STATINC(RIP6_STAT_NOSOCK); 245 if (m->m_flags & M_MCAST) 246 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 247 if (proto == IPPROTO_NONE) 248 m_freem(m); 249 else { 250 int s; 251 struct ifnet *rcvif = m_get_rcvif(m, &s); 252 const int prvnxt = ip6_get_prevhdr(m, *offp); 253 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 254 m_put_rcvif(rcvif, &s); 255 icmp6_error(m, ICMP6_PARAM_PROB, 256 ICMP6_PARAMPROB_NEXTHEADER, 257 prvnxt); 258 } 259 IP6_STATDEC(IP6_STAT_DELIVERED); 260 } 261 return IPPROTO_DONE; 262 } 263 264 void * 265 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 266 { 267 struct ip6_hdr *ip6; 268 struct ip6ctlparam *ip6cp = NULL; 269 const struct sockaddr_in6 *sa6_src = NULL; 270 void *cmdarg; 271 void (*notify)(struct in6pcb *, int) = in6_rtchange; 272 int nxt; 273 274 if (sa->sa_family != AF_INET6 || 275 sa->sa_len != sizeof(struct sockaddr_in6)) 276 return NULL; 277 278 if ((unsigned)cmd >= PRC_NCMDS) 279 return NULL; 280 if (PRC_IS_REDIRECT(cmd)) 281 notify = in6_rtchange, d = NULL; 282 else if (cmd == PRC_HOSTDEAD) 283 d = NULL; 284 else if (cmd == PRC_MSGSIZE) 285 ; /* special code is present, see below */ 286 else if (inet6ctlerrmap[cmd] == 0) 287 return NULL; 288 289 /* if the parameter is from icmp6, decode it. */ 290 if (d != NULL) { 291 ip6cp = (struct ip6ctlparam *)d; 292 ip6 = ip6cp->ip6c_ip6; 293 cmdarg = ip6cp->ip6c_cmdarg; 294 sa6_src = ip6cp->ip6c_src; 295 nxt = ip6cp->ip6c_nxt; 296 } else { 297 ip6 = NULL; 298 cmdarg = NULL; 299 sa6_src = &sa6_any; 300 nxt = -1; 301 } 302 303 if (ip6 && cmd == PRC_MSGSIZE) { 304 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 305 int valid = 0; 306 struct in6pcb *in6p; 307 308 /* 309 * Check to see if we have a valid raw IPv6 socket 310 * corresponding to the address in the ICMPv6 message 311 * payload, and the protocol (ip6_nxt) meets the socket. 312 * XXX chase extension headers, or pass final nxt value 313 * from icmp6_notify_error() 314 */ 315 in6p = NULL; 316 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 317 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 318 #if 0 319 if (!in6p) { 320 /* 321 * As the use of sendto(2) is fairly popular, 322 * we may want to allow non-connected pcb too. 323 * But it could be too weak against attacks... 324 * We should at least check if the local 325 * address (= s) is really ours. 326 */ 327 in6p = in6_pcblookup_bind(&raw6cbtable, 328 &sa6->sin6_addr, 0, 0); 329 } 330 #endif 331 332 if (in6p && in6p->in6p_ip6.ip6_nxt && 333 in6p->in6p_ip6.ip6_nxt == nxt) 334 valid++; 335 336 /* 337 * Depending on the value of "valid" and routing table 338 * size (mtudisc_{hi,lo}wat), we will: 339 * - recalculate the new MTU and create the 340 * corresponding routing entry, or 341 * - ignore the MTU change notification. 342 */ 343 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 344 345 /* 346 * regardless of if we called icmp6_mtudisc_update(), 347 * we need to call in6_pcbnotify(), to notify path MTU 348 * change to the userland (RFC3542), because some 349 * unconnected sockets may share the same destination 350 * and want to know the path MTU. 351 */ 352 } 353 354 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 355 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 356 return NULL; 357 } 358 359 /* 360 * Generate IPv6 header and pass packet to ip6_output. 361 * Tack on options user may have setup with control call. 362 */ 363 int 364 rip6_output(struct mbuf *m, struct socket * const so, 365 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 366 { 367 struct in6_addr *dst; 368 struct ip6_hdr *ip6; 369 struct in6pcb *in6p; 370 u_int plen = m->m_pkthdr.len; 371 int error = 0; 372 struct ip6_pktopts opt, *optp = NULL; 373 struct ifnet *oifp = NULL; 374 int type, code; /* for ICMPv6 output statistics only */ 375 int scope_ambiguous = 0; 376 int bound = curlwp_bind(); 377 struct psref psref; 378 379 in6p = sotoin6pcb(so); 380 381 dst = &dstsock->sin6_addr; 382 if (control) { 383 if ((error = ip6_setpktopts(control, &opt, 384 in6p->in6p_outputopts, 385 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 386 goto bad; 387 } 388 optp = &opt; 389 } else 390 optp = in6p->in6p_outputopts; 391 392 /* 393 * Check and convert scope zone ID into internal form. 394 * XXX: we may still need to determine the zone later. 395 */ 396 if (!(so->so_state & SS_ISCONNECTED)) { 397 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 398 scope_ambiguous = 1; 399 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 400 goto bad; 401 } 402 403 /* 404 * For an ICMPv6 packet, we should know its type and code 405 * to update statistics. 406 */ 407 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 408 struct icmp6_hdr *icmp6; 409 if (m->m_len < sizeof(struct icmp6_hdr) && 410 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 411 error = ENOBUFS; 412 goto bad; 413 } 414 icmp6 = mtod(m, struct icmp6_hdr *); 415 type = icmp6->icmp6_type; 416 code = icmp6->icmp6_code; 417 } else { 418 type = 0; 419 code = 0; 420 } 421 422 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 423 if (!m) { 424 error = ENOBUFS; 425 goto bad; 426 } 427 ip6 = mtod(m, struct ip6_hdr *); 428 429 /* 430 * Next header might not be ICMP6 but use its pseudo header anyway. 431 */ 432 ip6->ip6_dst = *dst; 433 434 /* 435 * Source address selection. 436 */ 437 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 438 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 439 if (error != 0) 440 goto bad; 441 442 if (oifp && scope_ambiguous) { 443 /* 444 * Application should provide a proper zone ID or the use of 445 * default zone IDs should be enabled. Unfortunately, some 446 * applications do not behave as it should, so we need a 447 * workaround. Even if an appropriate ID is not determined 448 * (when it's required), if we can determine the outgoing 449 * interface. determine the zone ID based on the interface. 450 */ 451 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 452 if (error != 0) 453 goto bad; 454 } 455 ip6->ip6_dst = dstsock->sin6_addr; 456 457 /* fill in the rest of the IPv6 header fields */ 458 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 459 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 460 ip6->ip6_vfc |= IPV6_VERSION; 461 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 462 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 463 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 464 465 if_put(oifp, &psref); 466 oifp = NULL; 467 468 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 469 in6p->in6p_cksum != -1) { 470 const uint8_t nxt = ip6->ip6_nxt; 471 int off; 472 u_int16_t sum; 473 474 /* compute checksum */ 475 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 476 off = offsetof(struct icmp6_hdr, icmp6_cksum); 477 else 478 off = in6p->in6p_cksum; 479 if (plen < off + 1) { 480 error = EINVAL; 481 goto bad; 482 } 483 off += sizeof(struct ip6_hdr); 484 485 sum = 0; 486 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 487 M_DONTWAIT); 488 if (m == NULL) { 489 error = ENOBUFS; 490 goto bad; 491 } 492 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 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 } 500 501 { 502 struct ifnet *ret_oifp = NULL; 503 504 error = ip6_output(m, optp, &in6p->in6p_route, 0, 505 in6p->in6p_moptions, in6p, &ret_oifp); 506 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 507 if (ret_oifp) 508 icmp6_ifoutstat_inc(ret_oifp, type, code); 509 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 510 } else 511 RIP6_STATINC(RIP6_STAT_OPACKETS); 512 } 513 514 goto freectl; 515 516 bad: 517 if (m) 518 m_freem(m); 519 520 freectl: 521 if (control) { 522 ip6_clearpktopts(&opt, -1); 523 m_freem(control); 524 } 525 if_put(oifp, &psref); 526 curlwp_bindx(bound); 527 return error; 528 } 529 530 /* 531 * Raw IPv6 socket option processing. 532 */ 533 int 534 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 535 { 536 int error = 0; 537 538 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 539 int optval; 540 541 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 542 if (op == PRCO_GETOPT) { 543 optval = 1; 544 error = sockopt_set(sopt, &optval, sizeof(optval)); 545 } else if (op == PRCO_SETOPT) { 546 error = sockopt_getint(sopt, &optval); 547 if (error) 548 goto out; 549 if (optval == 0) 550 error = EINVAL; 551 } 552 553 goto out; 554 } else if (sopt->sopt_level != IPPROTO_IPV6) 555 return ip6_ctloutput(op, so, sopt); 556 557 switch (sopt->sopt_name) { 558 case MRT6_INIT: 559 case MRT6_DONE: 560 case MRT6_ADD_MIF: 561 case MRT6_DEL_MIF: 562 case MRT6_ADD_MFC: 563 case MRT6_DEL_MFC: 564 case MRT6_PIM: 565 if (op == PRCO_SETOPT) 566 error = ip6_mrouter_set(so, sopt); 567 else if (op == PRCO_GETOPT) 568 error = ip6_mrouter_get(so, sopt); 569 else 570 error = EINVAL; 571 break; 572 case IPV6_CHECKSUM: 573 return ip6_raw_ctloutput(op, so, sopt); 574 default: 575 return ip6_ctloutput(op, so, sopt); 576 } 577 out: 578 return error; 579 } 580 581 extern u_long rip6_sendspace; 582 extern u_long rip6_recvspace; 583 584 int 585 rip6_attach(struct socket *so, int proto) 586 { 587 struct in6pcb *in6p; 588 int s, error; 589 590 KASSERT(sotoin6pcb(so) == NULL); 591 sosetlock(so); 592 593 error = kauth_authorize_network(curlwp->l_cred, 594 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 595 KAUTH_ARG(AF_INET6), 596 KAUTH_ARG(SOCK_RAW), 597 KAUTH_ARG(so->so_proto->pr_protocol)); 598 if (error) { 599 return error; 600 } 601 s = splsoftnet(); 602 error = soreserve(so, rip6_sendspace, rip6_recvspace); 603 if (error) { 604 splx(s); 605 return error; 606 } 607 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 608 splx(s); 609 return error; 610 } 611 splx(s); 612 in6p = sotoin6pcb(so); 613 in6p->in6p_ip6.ip6_nxt = proto; 614 in6p->in6p_cksum = -1; 615 616 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 617 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 618 KASSERT(solocked(so)); 619 return error; 620 } 621 622 static void 623 rip6_detach(struct socket *so) 624 { 625 struct in6pcb *in6p = sotoin6pcb(so); 626 627 KASSERT(solocked(so)); 628 KASSERT(in6p != NULL); 629 630 if (so == ip6_mrouter) { 631 ip6_mrouter_done(); 632 } 633 /* xxx: RSVP */ 634 if (in6p->in6p_icmp6filt != NULL) { 635 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 636 in6p->in6p_icmp6filt = NULL; 637 } 638 in6_pcbdetach(in6p); 639 } 640 641 static int 642 rip6_accept(struct socket *so, struct sockaddr *nam) 643 { 644 KASSERT(solocked(so)); 645 646 return EOPNOTSUPP; 647 } 648 649 static int 650 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 651 { 652 struct in6pcb *in6p = sotoin6pcb(so); 653 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 654 struct ifaddr *ifa = NULL; 655 int error = 0; 656 int s; 657 658 KASSERT(solocked(so)); 659 KASSERT(in6p != NULL); 660 KASSERT(nam != NULL); 661 662 if (addr->sin6_len != sizeof(*addr)) 663 return EINVAL; 664 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 665 return EADDRNOTAVAIL; 666 667 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 668 return error; 669 670 /* 671 * we don't support mapped address here, it would confuse 672 * users so reject it 673 */ 674 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 675 return EADDRNOTAVAIL; 676 s = pserialize_read_enter(); 677 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 678 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 679 error = EADDRNOTAVAIL; 680 goto out; 681 } 682 if (ifa && (ifatoia6(ifa))->ia6_flags & 683 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 684 error = EADDRNOTAVAIL; 685 goto out; 686 } 687 688 in6p->in6p_laddr = addr->sin6_addr; 689 error = 0; 690 out: 691 pserialize_read_exit(s); 692 return error; 693 } 694 695 static int 696 rip6_listen(struct socket *so, struct lwp *l) 697 { 698 KASSERT(solocked(so)); 699 700 return EOPNOTSUPP; 701 } 702 703 static int 704 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 705 { 706 struct in6pcb *in6p = sotoin6pcb(so); 707 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 708 struct in6_addr in6a; 709 struct ifnet *ifp = NULL; 710 int scope_ambiguous = 0; 711 int error = 0; 712 struct psref psref; 713 int bound; 714 715 KASSERT(solocked(so)); 716 KASSERT(in6p != NULL); 717 KASSERT(nam != NULL); 718 719 if (IFNET_READER_EMPTY()) 720 return EADDRNOTAVAIL; 721 if (addr->sin6_family != AF_INET6) 722 return EAFNOSUPPORT; 723 724 /* 725 * Application should provide a proper zone ID or the use of 726 * default zone IDs should be enabled. Unfortunately, some 727 * applications do not behave as it should, so we need a 728 * workaround. Even if an appropriate ID is not determined, 729 * we'll see if we can determine the outgoing interface. If we 730 * can, determine the zone ID based on the interface below. 731 */ 732 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 733 scope_ambiguous = 1; 734 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 735 return error; 736 737 bound = curlwp_bind(); 738 /* Source address selection. XXX: need pcblookup? */ 739 error = in6_selectsrc(addr, in6p->in6p_outputopts, 740 in6p->in6p_moptions, &in6p->in6p_route, 741 &in6p->in6p_laddr, &ifp, &psref, &in6a); 742 if (error != 0) 743 goto out; 744 /* XXX: see above */ 745 if (ifp && scope_ambiguous && 746 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 747 goto out; 748 } 749 in6p->in6p_laddr = in6a; 750 in6p->in6p_faddr = addr->sin6_addr; 751 soisconnected(so); 752 out: 753 if_put(ifp, &psref); 754 curlwp_bindx(bound); 755 return error; 756 } 757 758 static int 759 rip6_connect2(struct socket *so, struct socket *so2) 760 { 761 KASSERT(solocked(so)); 762 763 return EOPNOTSUPP; 764 } 765 766 static int 767 rip6_disconnect(struct socket *so) 768 { 769 struct in6pcb *in6p = sotoin6pcb(so); 770 771 KASSERT(solocked(so)); 772 KASSERT(in6p != NULL); 773 774 if ((so->so_state & SS_ISCONNECTED) == 0) 775 return ENOTCONN; 776 777 in6p->in6p_faddr = in6addr_any; 778 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 779 return 0; 780 } 781 782 static int 783 rip6_shutdown(struct socket *so) 784 { 785 KASSERT(solocked(so)); 786 787 /* 788 * Mark the connection as being incapable of futther input. 789 */ 790 socantsendmore(so); 791 return 0; 792 } 793 794 static int 795 rip6_abort(struct socket *so) 796 { 797 KASSERT(solocked(so)); 798 799 soisdisconnected(so); 800 rip6_detach(so); 801 return 0; 802 } 803 804 static int 805 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 806 { 807 return in6_control(so, cmd, nam, ifp); 808 } 809 810 static int 811 rip6_stat(struct socket *so, struct stat *ub) 812 { 813 KASSERT(solocked(so)); 814 815 /* stat: don't bother with a blocksize */ 816 return 0; 817 } 818 819 static int 820 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 821 { 822 KASSERT(solocked(so)); 823 KASSERT(sotoin6pcb(so) != NULL); 824 KASSERT(nam != NULL); 825 826 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 827 return 0; 828 } 829 830 static int 831 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 832 { 833 KASSERT(solocked(so)); 834 KASSERT(sotoin6pcb(so) != NULL); 835 KASSERT(nam != NULL); 836 837 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 838 return 0; 839 } 840 841 static int 842 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 843 { 844 KASSERT(solocked(so)); 845 846 return EOPNOTSUPP; 847 } 848 849 static int 850 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 851 { 852 KASSERT(solocked(so)); 853 854 return EOPNOTSUPP; 855 } 856 857 static int 858 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 859 struct mbuf *control, struct lwp *l) 860 { 861 struct in6pcb *in6p = sotoin6pcb(so); 862 struct sockaddr_in6 tmp; 863 struct sockaddr_in6 *dst; 864 int error = 0; 865 866 KASSERT(solocked(so)); 867 KASSERT(in6p != NULL); 868 KASSERT(m != NULL); 869 870 /* 871 * Ship a packet out. The appropriate raw output 872 * routine handles any messaging necessary. 873 */ 874 875 /* always copy sockaddr to avoid overwrites */ 876 if (so->so_state & SS_ISCONNECTED) { 877 if (nam) { 878 error = EISCONN; 879 goto release; 880 } 881 /* XXX */ 882 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 883 dst = &tmp; 884 } else { 885 if (nam == NULL) { 886 error = ENOTCONN; 887 goto release; 888 } 889 tmp = *(struct sockaddr_in6 *)nam; 890 dst = &tmp; 891 892 if (dst->sin6_family != AF_INET6) { 893 error = EAFNOSUPPORT; 894 goto release; 895 } 896 } 897 error = rip6_output(m, so, dst, control); 898 m = NULL; 899 900 release: 901 if (m) 902 m_freem(m); 903 904 return error; 905 } 906 907 static int 908 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 909 { 910 KASSERT(solocked(so)); 911 912 if (m) 913 m_freem(m); 914 915 return EOPNOTSUPP; 916 } 917 918 static int 919 rip6_purgeif(struct socket *so, struct ifnet *ifp) 920 { 921 922 mutex_enter(softnet_lock); 923 in6_pcbpurgeif0(&raw6cbtable, ifp); 924 #ifdef NET_MPSAFE 925 mutex_exit(softnet_lock); 926 #endif 927 in6_purgeif(ifp); 928 #ifdef NET_MPSAFE 929 mutex_enter(softnet_lock); 930 #endif 931 in6_pcbpurgeif(&raw6cbtable, ifp); 932 mutex_exit(softnet_lock); 933 934 return 0; 935 } 936 937 static int 938 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 939 { 940 941 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 942 } 943 944 static void 945 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 946 { 947 948 sysctl_createv(clog, 0, NULL, NULL, 949 CTLFLAG_PERMANENT, 950 CTLTYPE_NODE, "inet6", NULL, 951 NULL, 0, NULL, 0, 952 CTL_NET, PF_INET6, CTL_EOL); 953 sysctl_createv(clog, 0, NULL, NULL, 954 CTLFLAG_PERMANENT, 955 CTLTYPE_NODE, "raw6", 956 SYSCTL_DESCR("Raw IPv6 settings"), 957 NULL, 0, NULL, 0, 958 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 959 960 sysctl_createv(clog, 0, NULL, NULL, 961 CTLFLAG_PERMANENT, 962 CTLTYPE_STRUCT, "pcblist", 963 SYSCTL_DESCR("Raw IPv6 control block list"), 964 sysctl_inpcblist, 0, &raw6cbtable, 0, 965 CTL_NET, PF_INET6, IPPROTO_RAW, 966 CTL_CREATE, CTL_EOL); 967 sysctl_createv(clog, 0, NULL, NULL, 968 CTLFLAG_PERMANENT, 969 CTLTYPE_STRUCT, "stats", 970 SYSCTL_DESCR("Raw IPv6 statistics"), 971 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 972 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 973 CTL_EOL); 974 } 975 976 PR_WRAP_USRREQS(rip6) 977 #define rip6_attach rip6_attach_wrapper 978 #define rip6_detach rip6_detach_wrapper 979 #define rip6_accept rip6_accept_wrapper 980 #define rip6_bind rip6_bind_wrapper 981 #define rip6_listen rip6_listen_wrapper 982 #define rip6_connect rip6_connect_wrapper 983 #define rip6_connect2 rip6_connect2_wrapper 984 #define rip6_disconnect rip6_disconnect_wrapper 985 #define rip6_shutdown rip6_shutdown_wrapper 986 #define rip6_abort rip6_abort_wrapper 987 #define rip6_ioctl rip6_ioctl_wrapper 988 #define rip6_stat rip6_stat_wrapper 989 #define rip6_peeraddr rip6_peeraddr_wrapper 990 #define rip6_sockaddr rip6_sockaddr_wrapper 991 #define rip6_rcvd rip6_rcvd_wrapper 992 #define rip6_recvoob rip6_recvoob_wrapper 993 #define rip6_send rip6_send_wrapper 994 #define rip6_sendoob rip6_sendoob_wrapper 995 #define rip6_purgeif rip6_purgeif_wrapper 996 997 const struct pr_usrreqs rip6_usrreqs = { 998 .pr_attach = rip6_attach, 999 .pr_detach = rip6_detach, 1000 .pr_accept = rip6_accept, 1001 .pr_bind = rip6_bind, 1002 .pr_listen = rip6_listen, 1003 .pr_connect = rip6_connect, 1004 .pr_connect2 = rip6_connect2, 1005 .pr_disconnect = rip6_disconnect, 1006 .pr_shutdown = rip6_shutdown, 1007 .pr_abort = rip6_abort, 1008 .pr_ioctl = rip6_ioctl, 1009 .pr_stat = rip6_stat, 1010 .pr_peeraddr = rip6_peeraddr, 1011 .pr_sockaddr = rip6_sockaddr, 1012 .pr_rcvd = rip6_rcvd, 1013 .pr_recvoob = rip6_recvoob, 1014 .pr_send = rip6_send, 1015 .pr_sendoob = rip6_sendoob, 1016 .pr_purgeif = rip6_purgeif, 1017 }; 1018
Indexes created Mon Sep 22 13:09:51 GMT 2025