raw_ip6.c revision 1.175.4.1
1 /* $NetBSD: raw_ip6.c,v 1.175.4.1 2023/03/23 12:06:49 martin 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 1.175.4.1 2023/03/23 12:06:49 martin Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_ipsec.h" 69 #include "opt_net_mpsafe.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/sysctl.h> 74 #include <sys/mbuf.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/socketvar.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/kauth.h> 81 #include <sys/kmem.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/net_stats.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_private.h> 92 #include <netinet6/ip6_mroute.h> 93 #include <netinet/icmp6.h> 94 #include <netinet6/icmp6_private.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/ip6protosw.h> 97 #include <netinet6/scope6_var.h> 98 #include <netinet6/raw_ip6.h> 99 100 #ifdef IPSEC 101 #include <netipsec/ipsec.h> 102 #include <netipsec/ipsec6.h> 103 #endif 104 105 #include "faith.h" 106 #if defined(NFAITH) && 0 < NFAITH 107 #include <net/if_faith.h> 108 #endif 109 110 extern struct inpcbtable rawcbtable; 111 struct inpcbtable raw6cbtable; 112 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 113 114 /* 115 * Raw interface to IP6 protocol. 116 */ 117 118 static percpu_t *rip6stat_percpu; 119 120 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 121 122 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 123 124 /* 125 * Initialize raw connection block queue. 126 */ 127 void 128 rip6_init(void) 129 { 130 131 sysctl_net_inet6_raw6_setup(NULL); 132 in6_pcbinit(&raw6cbtable, 1, 1); 133 134 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 135 } 136 137 static void 138 rip6_sbappendaddr(struct in6pcb *last, struct ip6_hdr *ip6, 139 const struct sockaddr *sa, int hlen, struct mbuf *n) 140 { 141 struct mbuf *opts = NULL; 142 143 if (last->in6p_flags & IN6P_CONTROLOPTS) 144 ip6_savecontrol(last, &opts, ip6, n); 145 146 m_adj(n, hlen); 147 148 if (sbappendaddr(&last->in6p_socket->so_rcv, sa, n, opts) == 0) { 149 soroverflow(last->in6p_socket); 150 m_freem(n); 151 if (opts) 152 m_freem(opts); 153 RIP6_STATINC(RIP6_STAT_FULLSOCK); 154 } else { 155 sorwakeup(last->in6p_socket); 156 } 157 } 158 159 /* 160 * Setup generic address and protocol structures 161 * for raw_input routine, then pass them along with 162 * mbuf chain. 163 */ 164 int 165 rip6_input(struct mbuf **mp, int *offp, int proto) 166 { 167 struct mbuf *m = *mp; 168 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 169 struct inpcb_hdr *inph; 170 struct in6pcb *in6p; 171 struct in6pcb *last = NULL; 172 struct sockaddr_in6 rip6src; 173 struct mbuf *n; 174 175 RIP6_STATINC(RIP6_STAT_IPACKETS); 176 177 #if defined(NFAITH) && 0 < NFAITH 178 if (faithprefix(&ip6->ip6_dst)) { 179 /* send icmp6 host unreach? */ 180 m_freem(m); 181 return IPPROTO_DONE; 182 } 183 #endif 184 185 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 186 if (sa6_recoverscope(&rip6src) != 0) { 187 /* XXX: should be impossible. */ 188 m_freem(m); 189 return IPPROTO_DONE; 190 } 191 192 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 193 in6p = (struct in6pcb *)inph; 194 if (in6p->in6p_af != AF_INET6) 195 continue; 196 if (in6p->in6p_ip6.ip6_nxt && 197 in6p->in6p_ip6.ip6_nxt != proto) 198 continue; 199 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 200 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 201 continue; 202 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 203 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 204 continue; 205 if (in6p->in6p_cksum != -1) { 206 RIP6_STATINC(RIP6_STAT_ISUM); 207 /* 208 * Although in6_cksum() does not need the position of 209 * the checksum field for verification, enforce that it 210 * is located within the packet. Userland has given 211 * a checksum offset, a packet too short for that is 212 * invalid. Avoid overflow with user supplied offset. 213 */ 214 if (m->m_pkthdr.len < *offp + 2 || 215 m->m_pkthdr.len - *offp - 2 < in6p->in6p_cksum || 216 in6_cksum(m, proto, *offp, 217 m->m_pkthdr.len - *offp)) { 218 RIP6_STATINC(RIP6_STAT_BADSUM); 219 continue; 220 } 221 } 222 223 if (last == NULL) { 224 ; 225 } 226 #ifdef IPSEC 227 else if (ipsec_used && ipsec_in_reject(m, last)) { 228 /* do not inject data into pcb */ 229 } 230 #endif 231 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 232 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), 233 *offp, n); 234 } 235 236 last = in6p; 237 } 238 239 #ifdef IPSEC 240 if (ipsec_used && last && ipsec_in_reject(m, last)) { 241 m_freem(m); 242 IP6_STATDEC(IP6_STAT_DELIVERED); 243 /* do not inject data into pcb */ 244 } else 245 #endif 246 if (last != NULL) { 247 rip6_sbappendaddr(last, ip6, sin6tosa(&rip6src), *offp, m); 248 } else { 249 RIP6_STATINC(RIP6_STAT_NOSOCK); 250 if (m->m_flags & M_MCAST) 251 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 252 if (proto == IPPROTO_NONE) 253 m_freem(m); 254 else { 255 int s; 256 struct ifnet *rcvif = m_get_rcvif(m, &s); 257 const int prvnxt = ip6_get_prevhdr(m, *offp); 258 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 259 m_put_rcvif(rcvif, &s); 260 icmp6_error(m, ICMP6_PARAM_PROB, 261 ICMP6_PARAMPROB_NEXTHEADER, 262 prvnxt); 263 } 264 IP6_STATDEC(IP6_STAT_DELIVERED); 265 } 266 return IPPROTO_DONE; 267 } 268 269 void * 270 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 271 { 272 struct ip6_hdr *ip6; 273 struct ip6ctlparam *ip6cp = NULL; 274 const struct sockaddr_in6 *sa6_src = NULL; 275 void *cmdarg; 276 void (*notify)(struct in6pcb *, int) = in6_rtchange; 277 int nxt; 278 279 if (sa->sa_family != AF_INET6 || 280 sa->sa_len != sizeof(struct sockaddr_in6)) 281 return NULL; 282 283 if ((unsigned)cmd >= PRC_NCMDS) 284 return NULL; 285 if (PRC_IS_REDIRECT(cmd)) 286 notify = in6_rtchange, d = NULL; 287 else if (cmd == PRC_HOSTDEAD) 288 d = NULL; 289 else if (cmd == PRC_MSGSIZE) 290 ; /* special code is present, see below */ 291 else if (inet6ctlerrmap[cmd] == 0) 292 return NULL; 293 294 /* if the parameter is from icmp6, decode it. */ 295 if (d != NULL) { 296 ip6cp = (struct ip6ctlparam *)d; 297 ip6 = ip6cp->ip6c_ip6; 298 cmdarg = ip6cp->ip6c_cmdarg; 299 sa6_src = ip6cp->ip6c_src; 300 nxt = ip6cp->ip6c_nxt; 301 } else { 302 ip6 = NULL; 303 cmdarg = NULL; 304 sa6_src = &sa6_any; 305 nxt = -1; 306 } 307 308 if (ip6 && cmd == PRC_MSGSIZE) { 309 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 310 int valid = 0; 311 struct in6pcb *in6p; 312 313 /* 314 * Check to see if we have a valid raw IPv6 socket 315 * corresponding to the address in the ICMPv6 message 316 * payload, and the protocol (ip6_nxt) meets the socket. 317 * XXX chase extension headers, or pass final nxt value 318 * from icmp6_notify_error() 319 */ 320 in6p = NULL; 321 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 322 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 323 #if 0 324 if (!in6p) { 325 /* 326 * As the use of sendto(2) is fairly popular, 327 * we may want to allow non-connected pcb too. 328 * But it could be too weak against attacks... 329 * We should at least check if the local 330 * address (= s) is really ours. 331 */ 332 in6p = in6_pcblookup_bind(&raw6cbtable, 333 &sa6->sin6_addr, 0, 0); 334 } 335 #endif 336 337 if (in6p && in6p->in6p_ip6.ip6_nxt && 338 in6p->in6p_ip6.ip6_nxt == nxt) 339 valid++; 340 341 /* 342 * Depending on the value of "valid" and routing table 343 * size (mtudisc_{hi,lo}wat), we will: 344 * - recalculate the new MTU and create the 345 * corresponding routing entry, or 346 * - ignore the MTU change notification. 347 */ 348 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 349 350 /* 351 * regardless of if we called icmp6_mtudisc_update(), 352 * we need to call in6_pcbnotify(), to notify path MTU 353 * change to the userland (RFC3542), because some 354 * unconnected sockets may share the same destination 355 * and want to know the path MTU. 356 */ 357 } 358 359 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 360 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 361 return NULL; 362 } 363 364 /* 365 * Generate IPv6 header and pass packet to ip6_output. 366 * Tack on options user may have setup with control call. 367 */ 368 int 369 rip6_output(struct mbuf *m, struct socket * const so, 370 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 371 { 372 struct in6_addr *dst; 373 struct ip6_hdr *ip6; 374 struct in6pcb *in6p; 375 u_int plen = m->m_pkthdr.len; 376 int error = 0; 377 struct ip6_pktopts opt, *optp = NULL; 378 struct ifnet *oifp = NULL; 379 int type, code; /* for ICMPv6 output statistics only */ 380 int scope_ambiguous = 0; 381 int bound = curlwp_bind(); 382 struct psref psref; 383 384 in6p = sotoin6pcb(so); 385 386 dst = &dstsock->sin6_addr; 387 if (control) { 388 if ((error = ip6_setpktopts(control, &opt, 389 in6p->in6p_outputopts, 390 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 391 goto bad; 392 } 393 optp = &opt; 394 } else 395 optp = in6p->in6p_outputopts; 396 397 /* 398 * Check and convert scope zone ID into internal form. 399 * XXX: we may still need to determine the zone later. 400 */ 401 if (!(so->so_state & SS_ISCONNECTED)) { 402 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 403 scope_ambiguous = 1; 404 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 405 goto bad; 406 } 407 408 /* 409 * For an ICMPv6 packet, we should know its type and code 410 * to update statistics. 411 */ 412 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 413 struct icmp6_hdr *icmp6; 414 if (m->m_len < sizeof(struct icmp6_hdr) && 415 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 416 error = ENOBUFS; 417 goto bad; 418 } 419 icmp6 = mtod(m, struct icmp6_hdr *); 420 type = icmp6->icmp6_type; 421 code = icmp6->icmp6_code; 422 } else { 423 type = 0; 424 code = 0; 425 } 426 427 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 428 if (!m) { 429 error = ENOBUFS; 430 goto bad; 431 } 432 ip6 = mtod(m, struct ip6_hdr *); 433 434 /* 435 * Next header might not be ICMP6 but use its pseudo header anyway. 436 */ 437 ip6->ip6_dst = *dst; 438 439 /* 440 * Source address selection. 441 */ 442 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 443 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 444 if (error != 0) 445 goto bad; 446 447 if (oifp && scope_ambiguous) { 448 /* 449 * Application should provide a proper zone ID or the use of 450 * default zone IDs should be enabled. Unfortunately, some 451 * applications do not behave as it should, so we need a 452 * workaround. Even if an appropriate ID is not determined 453 * (when it's required), if we can determine the outgoing 454 * interface. determine the zone ID based on the interface. 455 */ 456 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 457 if (error != 0) 458 goto bad; 459 } 460 ip6->ip6_dst = dstsock->sin6_addr; 461 462 /* fill in the rest of the IPv6 header fields */ 463 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 464 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 465 ip6->ip6_vfc |= IPV6_VERSION; 466 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 467 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 468 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 469 470 if_put(oifp, &psref); 471 oifp = NULL; 472 473 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 474 in6p->in6p_cksum != -1) { 475 const uint8_t nxt = ip6->ip6_nxt; 476 int off; 477 u_int16_t sum; 478 479 /* compute checksum */ 480 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 481 off = offsetof(struct icmp6_hdr, icmp6_cksum); 482 else 483 off = in6p->in6p_cksum; 484 if (plen < 2 || plen - 2 < off) { 485 error = EINVAL; 486 goto bad; 487 } 488 off += sizeof(struct ip6_hdr); 489 490 sum = 0; 491 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 492 M_DONTWAIT); 493 if (m == NULL) { 494 error = ENOBUFS; 495 goto bad; 496 } 497 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 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 } 505 506 { 507 struct ifnet *ret_oifp = NULL; 508 509 error = ip6_output(m, optp, &in6p->in6p_route, 0, 510 in6p->in6p_moptions, in6p, &ret_oifp); 511 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 512 if (ret_oifp) 513 icmp6_ifoutstat_inc(ret_oifp, type, code); 514 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 515 } else 516 RIP6_STATINC(RIP6_STAT_OPACKETS); 517 } 518 519 goto freectl; 520 521 bad: 522 if (m) 523 m_freem(m); 524 525 freectl: 526 if (control) { 527 ip6_clearpktopts(&opt, -1); 528 m_freem(control); 529 } 530 if_put(oifp, &psref); 531 curlwp_bindx(bound); 532 return error; 533 } 534 535 /* 536 * Raw IPv6 socket option processing. 537 */ 538 int 539 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 540 { 541 int error = 0; 542 543 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 544 int optval; 545 546 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 547 if (op == PRCO_GETOPT) { 548 optval = 1; 549 error = sockopt_set(sopt, &optval, sizeof(optval)); 550 } else if (op == PRCO_SETOPT) { 551 error = sockopt_getint(sopt, &optval); 552 if (error) 553 goto out; 554 if (optval == 0) 555 error = EINVAL; 556 } 557 558 goto out; 559 } else if (sopt->sopt_level != IPPROTO_IPV6) 560 return ip6_ctloutput(op, so, sopt); 561 562 switch (sopt->sopt_name) { 563 case MRT6_INIT: 564 case MRT6_DONE: 565 case MRT6_ADD_MIF: 566 case MRT6_DEL_MIF: 567 case MRT6_ADD_MFC: 568 case MRT6_DEL_MFC: 569 case MRT6_PIM: 570 if (op == PRCO_SETOPT) 571 error = ip6_mrouter_set(so, sopt); 572 else if (op == PRCO_GETOPT) 573 error = ip6_mrouter_get(so, sopt); 574 else 575 error = EINVAL; 576 break; 577 case IPV6_CHECKSUM: 578 return ip6_raw_ctloutput(op, so, sopt); 579 default: 580 return ip6_ctloutput(op, so, sopt); 581 } 582 out: 583 return error; 584 } 585 586 extern u_long rip6_sendspace; 587 extern u_long rip6_recvspace; 588 589 int 590 rip6_attach(struct socket *so, int proto) 591 { 592 struct in6pcb *in6p; 593 int s, error; 594 595 KASSERT(sotoin6pcb(so) == NULL); 596 sosetlock(so); 597 598 error = kauth_authorize_network(curlwp->l_cred, 599 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 600 KAUTH_ARG(AF_INET6), 601 KAUTH_ARG(SOCK_RAW), 602 KAUTH_ARG(so->so_proto->pr_protocol)); 603 if (error) { 604 return error; 605 } 606 s = splsoftnet(); 607 error = soreserve(so, rip6_sendspace, rip6_recvspace); 608 if (error) { 609 splx(s); 610 return error; 611 } 612 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 613 splx(s); 614 return error; 615 } 616 splx(s); 617 in6p = sotoin6pcb(so); 618 in6p->in6p_ip6.ip6_nxt = proto; 619 in6p->in6p_cksum = -1; 620 621 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 622 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 623 KASSERT(solocked(so)); 624 return error; 625 } 626 627 static void 628 rip6_detach(struct socket *so) 629 { 630 struct in6pcb *in6p = sotoin6pcb(so); 631 632 KASSERT(solocked(so)); 633 KASSERT(in6p != NULL); 634 635 if (so == ip6_mrouter) { 636 ip6_mrouter_done(); 637 } 638 /* xxx: RSVP */ 639 if (in6p->in6p_icmp6filt != NULL) { 640 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 641 in6p->in6p_icmp6filt = NULL; 642 } 643 in6_pcbdetach(in6p); 644 } 645 646 static int 647 rip6_accept(struct socket *so, struct sockaddr *nam) 648 { 649 KASSERT(solocked(so)); 650 651 return EOPNOTSUPP; 652 } 653 654 static int 655 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 656 { 657 struct in6pcb *in6p = sotoin6pcb(so); 658 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 659 struct ifaddr *ifa = NULL; 660 int error = 0; 661 int s; 662 663 KASSERT(solocked(so)); 664 KASSERT(in6p != NULL); 665 KASSERT(nam != NULL); 666 667 if (addr->sin6_len != sizeof(*addr)) 668 return EINVAL; 669 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 670 return EADDRNOTAVAIL; 671 672 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 673 return error; 674 675 /* 676 * we don't support mapped address here, it would confuse 677 * users so reject it 678 */ 679 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 680 return EADDRNOTAVAIL; 681 s = pserialize_read_enter(); 682 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 683 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 684 error = EADDRNOTAVAIL; 685 goto out; 686 } 687 if (ifa && (ifatoia6(ifa))->ia6_flags & 688 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 689 error = EADDRNOTAVAIL; 690 goto out; 691 } 692 693 in6p->in6p_laddr = addr->sin6_addr; 694 error = 0; 695 out: 696 pserialize_read_exit(s); 697 return error; 698 } 699 700 static int 701 rip6_listen(struct socket *so, struct lwp *l) 702 { 703 KASSERT(solocked(so)); 704 705 return EOPNOTSUPP; 706 } 707 708 static int 709 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 710 { 711 struct in6pcb *in6p = sotoin6pcb(so); 712 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 713 struct in6_addr in6a; 714 struct ifnet *ifp = NULL; 715 int scope_ambiguous = 0; 716 int error = 0; 717 struct psref psref; 718 int bound; 719 720 KASSERT(solocked(so)); 721 KASSERT(in6p != NULL); 722 KASSERT(nam != NULL); 723 724 if (IFNET_READER_EMPTY()) 725 return EADDRNOTAVAIL; 726 if (addr->sin6_family != AF_INET6) 727 return EAFNOSUPPORT; 728 if (addr->sin6_len != sizeof(*addr)) 729 return EINVAL; 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 if (dst->sin6_len != sizeof(*dst)) { 904 error = EINVAL; 905 goto release; 906 } 907 } 908 error = rip6_output(m, so, dst, control); 909 m = NULL; 910 911 release: 912 if (m) 913 m_freem(m); 914 915 return error; 916 } 917 918 static int 919 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 920 { 921 KASSERT(solocked(so)); 922 923 m_freem(m); 924 m_freem(control); 925 926 return EOPNOTSUPP; 927 } 928 929 static int 930 rip6_purgeif(struct socket *so, struct ifnet *ifp) 931 { 932 933 mutex_enter(softnet_lock); 934 in6_pcbpurgeif0(&raw6cbtable, ifp); 935 #ifdef NET_MPSAFE 936 mutex_exit(softnet_lock); 937 #endif 938 in6_purgeif(ifp); 939 #ifdef NET_MPSAFE 940 mutex_enter(softnet_lock); 941 #endif 942 in6_pcbpurgeif(&raw6cbtable, ifp); 943 mutex_exit(softnet_lock); 944 945 return 0; 946 } 947 948 static int 949 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 950 { 951 952 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 953 } 954 955 static void 956 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 957 { 958 959 sysctl_createv(clog, 0, NULL, NULL, 960 CTLFLAG_PERMANENT, 961 CTLTYPE_NODE, "inet6", NULL, 962 NULL, 0, NULL, 0, 963 CTL_NET, PF_INET6, CTL_EOL); 964 sysctl_createv(clog, 0, NULL, NULL, 965 CTLFLAG_PERMANENT, 966 CTLTYPE_NODE, "raw6", 967 SYSCTL_DESCR("Raw IPv6 settings"), 968 NULL, 0, NULL, 0, 969 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 970 971 sysctl_createv(clog, 0, NULL, NULL, 972 CTLFLAG_PERMANENT, 973 CTLTYPE_STRUCT, "pcblist", 974 SYSCTL_DESCR("Raw IPv6 control block list"), 975 sysctl_inpcblist, 0, &raw6cbtable, 0, 976 CTL_NET, PF_INET6, IPPROTO_RAW, 977 CTL_CREATE, CTL_EOL); 978 sysctl_createv(clog, 0, NULL, NULL, 979 CTLFLAG_PERMANENT, 980 CTLTYPE_STRUCT, "stats", 981 SYSCTL_DESCR("Raw IPv6 statistics"), 982 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 983 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 984 CTL_EOL); 985 } 986 987 PR_WRAP_USRREQS(rip6) 988 #define rip6_attach rip6_attach_wrapper 989 #define rip6_detach rip6_detach_wrapper 990 #define rip6_accept rip6_accept_wrapper 991 #define rip6_bind rip6_bind_wrapper 992 #define rip6_listen rip6_listen_wrapper 993 #define rip6_connect rip6_connect_wrapper 994 #define rip6_connect2 rip6_connect2_wrapper 995 #define rip6_disconnect rip6_disconnect_wrapper 996 #define rip6_shutdown rip6_shutdown_wrapper 997 #define rip6_abort rip6_abort_wrapper 998 #define rip6_ioctl rip6_ioctl_wrapper 999 #define rip6_stat rip6_stat_wrapper 1000 #define rip6_peeraddr rip6_peeraddr_wrapper 1001 #define rip6_sockaddr rip6_sockaddr_wrapper 1002 #define rip6_rcvd rip6_rcvd_wrapper 1003 #define rip6_recvoob rip6_recvoob_wrapper 1004 #define rip6_send rip6_send_wrapper 1005 #define rip6_sendoob rip6_sendoob_wrapper 1006 #define rip6_purgeif rip6_purgeif_wrapper 1007 1008 const struct pr_usrreqs rip6_usrreqs = { 1009 .pr_attach = rip6_attach, 1010 .pr_detach = rip6_detach, 1011 .pr_accept = rip6_accept, 1012 .pr_bind = rip6_bind, 1013 .pr_listen = rip6_listen, 1014 .pr_connect = rip6_connect, 1015 .pr_connect2 = rip6_connect2, 1016 .pr_disconnect = rip6_disconnect, 1017 .pr_shutdown = rip6_shutdown, 1018 .pr_abort = rip6_abort, 1019 .pr_ioctl = rip6_ioctl, 1020 .pr_stat = rip6_stat, 1021 .pr_peeraddr = rip6_peeraddr, 1022 .pr_sockaddr = rip6_sockaddr, 1023 .pr_rcvd = rip6_rcvd, 1024 .pr_recvoob = rip6_recvoob, 1025 .pr_send = rip6_send, 1026 .pr_sendoob = rip6_sendoob, 1027 .pr_purgeif = rip6_purgeif, 1028 }; 1029
Indexes created Tue Sep 30 20:09:53 GMT 2025