raw_ip6.c revision 1.157.2.6
1 /* $NetBSD: raw_ip6.c,v 1.157.2.6 2023/03/23 12:08:39 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 1.157.2.6 2023/03/23 12:08:39 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/ipsec_var.h> 103 #include <netipsec/ipsec_private.h> 104 #include <netipsec/ipsec6.h> 105 #endif 106 107 #include "faith.h" 108 #if defined(NFAITH) && 0 < NFAITH 109 #include <net/if_faith.h> 110 #endif 111 112 extern struct inpcbtable rawcbtable; 113 struct inpcbtable raw6cbtable; 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 static percpu_t *rip6stat_percpu; 121 122 #define RIP6_STATINC(x) _NET_STATINC(rip6stat_percpu, x) 123 124 static void sysctl_net_inet6_raw6_setup(struct sysctllog **); 125 126 /* 127 * Initialize raw connection block queue. 128 */ 129 void 130 rip6_init(void) 131 { 132 133 sysctl_net_inet6_raw6_setup(NULL); 134 in6_pcbinit(&raw6cbtable, 1, 1); 135 136 rip6stat_percpu = percpu_alloc(sizeof(uint64_t) * RIP6_NSTATS); 137 } 138 139 /* 140 * Setup generic address and protocol structures 141 * for raw_input routine, then pass them along with 142 * mbuf chain. 143 */ 144 int 145 rip6_input(struct mbuf **mp, int *offp, int proto) 146 { 147 struct mbuf *m = *mp; 148 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 149 struct inpcb_hdr *inph; 150 struct in6pcb *in6p; 151 struct in6pcb *last = NULL; 152 struct sockaddr_in6 rip6src; 153 struct mbuf *opts = NULL; 154 155 RIP6_STATINC(RIP6_STAT_IPACKETS); 156 157 #if defined(NFAITH) && 0 < NFAITH 158 if (faithprefix(&ip6->ip6_dst)) { 159 /* send icmp6 host unreach? */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 #endif 164 165 /* Be proactive about malicious use of IPv4 mapped address */ 166 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 167 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 168 /* XXX stat */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 sockaddr_in6_init(&rip6src, &ip6->ip6_src, 0, 0, 0); 174 if (sa6_recoverscope(&rip6src) != 0) { 175 /* XXX: should be impossible. */ 176 m_freem(m); 177 return IPPROTO_DONE; 178 } 179 180 TAILQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 181 in6p = (struct in6pcb *)inph; 182 if (in6p->in6p_af != AF_INET6) 183 continue; 184 if (in6p->in6p_ip6.ip6_nxt && 185 in6p->in6p_ip6.ip6_nxt != proto) 186 continue; 187 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 188 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 192 continue; 193 if (in6p->in6p_cksum != -1) { 194 RIP6_STATINC(RIP6_STAT_ISUM); 195 /* 196 * Although in6_cksum() does not need the position of 197 * the checksum field for verification, enforce that it 198 * is located within the packet. Userland has given 199 * a checksum offset, a packet too short for that is 200 * invalid. Avoid overflow with user supplied offset. 201 */ 202 if (m->m_pkthdr.len < *offp + 2 || 203 m->m_pkthdr.len - *offp - 2 < in6p->in6p_cksum || 204 in6_cksum(m, proto, *offp, 205 m->m_pkthdr.len - *offp)) { 206 RIP6_STATINC(RIP6_STAT_BADSUM); 207 continue; 208 } 209 } 210 if (last) { 211 struct mbuf *n; 212 213 #ifdef IPSEC 214 /* 215 * Check AH/ESP integrity 216 */ 217 if (!ipsec_used || 218 (ipsec_used && !ipsec6_in_reject(m, last))) 219 #endif /* IPSEC */ 220 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 221 if (last->in6p_flags & IN6P_CONTROLOPTS) 222 ip6_savecontrol(last, &opts, ip6, n); 223 /* strip intermediate headers */ 224 m_adj(n, *offp); 225 if (sbappendaddr(&last->in6p_socket->so_rcv, 226 sin6tosa(&rip6src), n, opts) == 0) { 227 soroverflow(last->in6p_socket); 228 m_freem(n); 229 if (opts) 230 m_freem(opts); 231 RIP6_STATINC(RIP6_STAT_FULLSOCK); 232 } else 233 sorwakeup(last->in6p_socket); 234 opts = NULL; 235 } 236 } 237 last = in6p; 238 } 239 #ifdef IPSEC 240 if (ipsec_used && last && ipsec6_in_reject(m, last)) { 241 m_freem(m); 242 /* 243 * XXX ipsec6_in_reject update stat if there is an error 244 * so we just need to update stats by hand in the case of last is 245 * NULL 246 */ 247 if (!last) 248 IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); 249 IP6_STATDEC(IP6_STAT_DELIVERED); 250 /* do not inject data into pcb */ 251 } else 252 #endif /* IPSEC */ 253 if (last) { 254 if (last->in6p_flags & IN6P_CONTROLOPTS) 255 ip6_savecontrol(last, &opts, ip6, m); 256 /* strip intermediate headers */ 257 m_adj(m, *offp); 258 if (sbappendaddr(&last->in6p_socket->so_rcv, 259 sin6tosa(&rip6src), m, opts) == 0) { 260 soroverflow(last->in6p_socket); 261 m_freem(m); 262 if (opts) 263 m_freem(opts); 264 RIP6_STATINC(RIP6_STAT_FULLSOCK); 265 } else 266 sorwakeup(last->in6p_socket); 267 } else { 268 RIP6_STATINC(RIP6_STAT_NOSOCK); 269 if (m->m_flags & M_MCAST) 270 RIP6_STATINC(RIP6_STAT_NOSOCKMCAST); 271 if (proto == IPPROTO_NONE) 272 m_freem(m); 273 else { 274 int s; 275 struct ifnet *rcvif = m_get_rcvif(m, &s); 276 const int prvnxt = ip6_get_prevhdr(m, *offp); 277 in6_ifstat_inc(rcvif, ifs6_in_protounknown); 278 m_put_rcvif(rcvif, &s); 279 icmp6_error(m, ICMP6_PARAM_PROB, 280 ICMP6_PARAMPROB_NEXTHEADER, 281 prvnxt); 282 } 283 IP6_STATDEC(IP6_STAT_DELIVERED); 284 } 285 return IPPROTO_DONE; 286 } 287 288 void * 289 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 290 { 291 struct ip6_hdr *ip6; 292 struct ip6ctlparam *ip6cp = NULL; 293 const struct sockaddr_in6 *sa6_src = NULL; 294 void *cmdarg; 295 void (*notify)(struct in6pcb *, int) = in6_rtchange; 296 int nxt; 297 298 if (sa->sa_family != AF_INET6 || 299 sa->sa_len != sizeof(struct sockaddr_in6)) 300 return NULL; 301 302 if ((unsigned)cmd >= PRC_NCMDS) 303 return NULL; 304 if (PRC_IS_REDIRECT(cmd)) 305 notify = in6_rtchange, d = NULL; 306 else if (cmd == PRC_HOSTDEAD) 307 d = NULL; 308 else if (cmd == PRC_MSGSIZE) 309 ; /* special code is present, see below */ 310 else if (inet6ctlerrmap[cmd] == 0) 311 return NULL; 312 313 /* if the parameter is from icmp6, decode it. */ 314 if (d != NULL) { 315 ip6cp = (struct ip6ctlparam *)d; 316 ip6 = ip6cp->ip6c_ip6; 317 cmdarg = ip6cp->ip6c_cmdarg; 318 sa6_src = ip6cp->ip6c_src; 319 nxt = ip6cp->ip6c_nxt; 320 } else { 321 ip6 = NULL; 322 cmdarg = NULL; 323 sa6_src = &sa6_any; 324 nxt = -1; 325 } 326 327 if (ip6 && cmd == PRC_MSGSIZE) { 328 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 329 int valid = 0; 330 struct in6pcb *in6p; 331 332 /* 333 * Check to see if we have a valid raw IPv6 socket 334 * corresponding to the address in the ICMPv6 message 335 * payload, and the protocol (ip6_nxt) meets the socket. 336 * XXX chase extension headers, or pass final nxt value 337 * from icmp6_notify_error() 338 */ 339 in6p = NULL; 340 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 341 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0, 0); 342 #if 0 343 if (!in6p) { 344 /* 345 * As the use of sendto(2) is fairly popular, 346 * we may want to allow non-connected pcb too. 347 * But it could be too weak against attacks... 348 * We should at least check if the local 349 * address (= s) is really ours. 350 */ 351 in6p = in6_pcblookup_bind(&raw6cbtable, 352 &sa6->sin6_addr, 0, 0); 353 } 354 #endif 355 356 if (in6p && in6p->in6p_ip6.ip6_nxt && 357 in6p->in6p_ip6.ip6_nxt == nxt) 358 valid++; 359 360 /* 361 * Depending on the value of "valid" and routing table 362 * size (mtudisc_{hi,lo}wat), we will: 363 * - recalculate the new MTU and create the 364 * corresponding routing entry, or 365 * - ignore the MTU change notification. 366 */ 367 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 368 369 /* 370 * regardless of if we called icmp6_mtudisc_update(), 371 * we need to call in6_pcbnotify(), to notify path MTU 372 * change to the userland (RFC3542), because some 373 * unconnected sockets may share the same destination 374 * and want to know the path MTU. 375 */ 376 } 377 378 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 379 sin6tocsa(sa6_src), 0, cmd, cmdarg, notify); 380 return NULL; 381 } 382 383 /* 384 * Generate IPv6 header and pass packet to ip6_output. 385 * Tack on options user may have setup with control call. 386 */ 387 int 388 rip6_output(struct mbuf *m, struct socket * const so, 389 struct sockaddr_in6 * const dstsock, struct mbuf * const control) 390 { 391 struct in6_addr *dst; 392 struct ip6_hdr *ip6; 393 struct in6pcb *in6p; 394 u_int plen = m->m_pkthdr.len; 395 int error = 0; 396 struct ip6_pktopts opt, *optp = NULL; 397 struct ifnet *oifp = NULL; 398 int type, code; /* for ICMPv6 output statistics only */ 399 int scope_ambiguous = 0; 400 int bound = curlwp_bind(); 401 struct psref psref; 402 403 in6p = sotoin6pcb(so); 404 405 dst = &dstsock->sin6_addr; 406 if (control) { 407 if ((error = ip6_setpktopts(control, &opt, 408 in6p->in6p_outputopts, 409 kauth_cred_get(), so->so_proto->pr_protocol)) != 0) { 410 goto bad; 411 } 412 optp = &opt; 413 } else 414 optp = in6p->in6p_outputopts; 415 416 /* 417 * Check and convert scope zone ID into internal form. 418 * XXX: we may still need to determine the zone later. 419 */ 420 if (!(so->so_state & SS_ISCONNECTED)) { 421 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 422 scope_ambiguous = 1; 423 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 424 goto bad; 425 } 426 427 /* 428 * For an ICMPv6 packet, we should know its type and code 429 * to update statistics. 430 */ 431 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 432 struct icmp6_hdr *icmp6; 433 if (m->m_len < sizeof(struct icmp6_hdr) && 434 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 435 error = ENOBUFS; 436 goto bad; 437 } 438 icmp6 = mtod(m, struct icmp6_hdr *); 439 type = icmp6->icmp6_type; 440 code = icmp6->icmp6_code; 441 } else { 442 type = 0; 443 code = 0; 444 } 445 446 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 447 if (!m) { 448 error = ENOBUFS; 449 goto bad; 450 } 451 ip6 = mtod(m, struct ip6_hdr *); 452 453 /* 454 * Next header might not be ICMP6 but use its pseudo header anyway. 455 */ 456 ip6->ip6_dst = *dst; 457 458 /* 459 * Source address selection. 460 */ 461 error = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 462 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &psref, &ip6->ip6_src); 463 if (error != 0) 464 goto bad; 465 466 if (oifp && scope_ambiguous) { 467 /* 468 * Application should provide a proper zone ID or the use of 469 * default zone IDs should be enabled. Unfortunately, some 470 * applications do not behave as it should, so we need a 471 * workaround. Even if an appropriate ID is not determined 472 * (when it's required), if we can determine the outgoing 473 * interface. determine the zone ID based on the interface. 474 */ 475 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 476 if (error != 0) 477 goto bad; 478 } 479 ip6->ip6_dst = dstsock->sin6_addr; 480 481 /* fill in the rest of the IPv6 header fields */ 482 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 483 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 484 ip6->ip6_vfc |= IPV6_VERSION; 485 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 486 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 487 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 488 489 if_put(oifp, &psref); 490 oifp = NULL; 491 492 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 493 in6p->in6p_cksum != -1) { 494 const uint8_t nxt = ip6->ip6_nxt; 495 int off; 496 u_int16_t sum; 497 498 /* compute checksum */ 499 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 500 off = offsetof(struct icmp6_hdr, icmp6_cksum); 501 else 502 off = in6p->in6p_cksum; 503 if (plen < 2 || plen - 2 < off) { 504 error = EINVAL; 505 goto bad; 506 } 507 off += sizeof(struct ip6_hdr); 508 509 sum = 0; 510 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 511 M_DONTWAIT); 512 if (m == NULL) { 513 error = ENOBUFS; 514 goto bad; 515 } 516 sum = in6_cksum(m, nxt, sizeof(*ip6), plen); 517 m = m_copyback_cow(m, off, sizeof(sum), (void *)&sum, 518 M_DONTWAIT); 519 if (m == NULL) { 520 error = ENOBUFS; 521 goto bad; 522 } 523 } 524 525 { 526 struct ifnet *ret_oifp = NULL; 527 528 error = ip6_output(m, optp, &in6p->in6p_route, 0, 529 in6p->in6p_moptions, in6p, &ret_oifp); 530 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 531 if (ret_oifp) 532 icmp6_ifoutstat_inc(ret_oifp, type, code); 533 ICMP6_STATINC(ICMP6_STAT_OUTHIST + type); 534 } else 535 RIP6_STATINC(RIP6_STAT_OPACKETS); 536 } 537 538 goto freectl; 539 540 bad: 541 if (m) 542 m_freem(m); 543 544 freectl: 545 if (control) { 546 ip6_clearpktopts(&opt, -1); 547 m_freem(control); 548 } 549 if_put(oifp, &psref); 550 curlwp_bindx(bound); 551 return error; 552 } 553 554 /* 555 * Raw IPv6 socket option processing. 556 */ 557 int 558 rip6_ctloutput(int op, struct socket *so, struct sockopt *sopt) 559 { 560 int error = 0; 561 562 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 563 int optval; 564 565 /* need to fiddle w/ opt(IPPROTO_IPV6, IPV6_CHECKSUM)? */ 566 if (op == PRCO_GETOPT) { 567 optval = 1; 568 error = sockopt_set(sopt, &optval, sizeof(optval)); 569 } else if (op == PRCO_SETOPT) { 570 error = sockopt_getint(sopt, &optval); 571 if (error) 572 goto out; 573 if (optval == 0) 574 error = EINVAL; 575 } 576 577 goto out; 578 } else if (sopt->sopt_level != IPPROTO_IPV6) 579 return ip6_ctloutput(op, so, sopt); 580 581 switch (sopt->sopt_name) { 582 case MRT6_INIT: 583 case MRT6_DONE: 584 case MRT6_ADD_MIF: 585 case MRT6_DEL_MIF: 586 case MRT6_ADD_MFC: 587 case MRT6_DEL_MFC: 588 case MRT6_PIM: 589 if (op == PRCO_SETOPT) 590 error = ip6_mrouter_set(so, sopt); 591 else if (op == PRCO_GETOPT) 592 error = ip6_mrouter_get(so, sopt); 593 else 594 error = EINVAL; 595 break; 596 case IPV6_CHECKSUM: 597 return ip6_raw_ctloutput(op, so, sopt); 598 default: 599 return ip6_ctloutput(op, so, sopt); 600 } 601 out: 602 return error; 603 } 604 605 extern u_long rip6_sendspace; 606 extern u_long rip6_recvspace; 607 608 int 609 rip6_attach(struct socket *so, int proto) 610 { 611 struct in6pcb *in6p; 612 int s, error; 613 614 KASSERT(sotoin6pcb(so) == NULL); 615 sosetlock(so); 616 617 error = kauth_authorize_network(curlwp->l_cred, 618 KAUTH_NETWORK_SOCKET, KAUTH_REQ_NETWORK_SOCKET_RAWSOCK, 619 KAUTH_ARG(AF_INET6), 620 KAUTH_ARG(SOCK_RAW), 621 KAUTH_ARG(so->so_proto->pr_protocol)); 622 if (error) { 623 return error; 624 } 625 s = splsoftnet(); 626 error = soreserve(so, rip6_sendspace, rip6_recvspace); 627 if (error) { 628 splx(s); 629 return error; 630 } 631 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 632 splx(s); 633 return error; 634 } 635 splx(s); 636 in6p = sotoin6pcb(so); 637 in6p->in6p_ip6.ip6_nxt = proto; 638 in6p->in6p_cksum = -1; 639 640 in6p->in6p_icmp6filt = kmem_alloc(sizeof(struct icmp6_filter), KM_SLEEP); 641 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 642 KASSERT(solocked(so)); 643 return error; 644 } 645 646 static void 647 rip6_detach(struct socket *so) 648 { 649 struct in6pcb *in6p = sotoin6pcb(so); 650 651 KASSERT(solocked(so)); 652 KASSERT(in6p != NULL); 653 654 if (so == ip6_mrouter) { 655 ip6_mrouter_done(); 656 } 657 /* xxx: RSVP */ 658 if (in6p->in6p_icmp6filt != NULL) { 659 kmem_free(in6p->in6p_icmp6filt, sizeof(struct icmp6_filter)); 660 in6p->in6p_icmp6filt = NULL; 661 } 662 in6_pcbdetach(in6p); 663 } 664 665 static int 666 rip6_accept(struct socket *so, struct sockaddr *nam) 667 { 668 KASSERT(solocked(so)); 669 670 return EOPNOTSUPP; 671 } 672 673 static int 674 rip6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 675 { 676 struct in6pcb *in6p = sotoin6pcb(so); 677 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 678 struct ifaddr *ifa = NULL; 679 int error = 0; 680 int s; 681 682 KASSERT(solocked(so)); 683 KASSERT(in6p != NULL); 684 KASSERT(nam != NULL); 685 686 if (addr->sin6_len != sizeof(*addr)) 687 return EINVAL; 688 if (IFNET_READER_EMPTY() || addr->sin6_family != AF_INET6) 689 return EADDRNOTAVAIL; 690 691 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 692 return error; 693 694 /* 695 * we don't support mapped address here, it would confuse 696 * users so reject it 697 */ 698 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) 699 return EADDRNOTAVAIL; 700 s = pserialize_read_enter(); 701 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 702 (ifa = ifa_ifwithaddr(sin6tosa(addr))) == NULL) { 703 error = EADDRNOTAVAIL; 704 goto out; 705 } 706 if (ifa && (ifatoia6(ifa))->ia6_flags & 707 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 708 error = EADDRNOTAVAIL; 709 goto out; 710 } 711 712 in6p->in6p_laddr = addr->sin6_addr; 713 error = 0; 714 out: 715 pserialize_read_exit(s); 716 return error; 717 } 718 719 static int 720 rip6_listen(struct socket *so, struct lwp *l) 721 { 722 KASSERT(solocked(so)); 723 724 return EOPNOTSUPP; 725 } 726 727 static int 728 rip6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 729 { 730 struct in6pcb *in6p = sotoin6pcb(so); 731 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 732 struct in6_addr in6a; 733 struct ifnet *ifp = NULL; 734 int scope_ambiguous = 0; 735 int error = 0; 736 struct psref psref; 737 int bound; 738 739 KASSERT(solocked(so)); 740 KASSERT(in6p != NULL); 741 KASSERT(nam != NULL); 742 743 if (IFNET_READER_EMPTY()) 744 return EADDRNOTAVAIL; 745 if (addr->sin6_family != AF_INET6) 746 return EAFNOSUPPORT; 747 748 /* 749 * Application should provide a proper zone ID or the use of 750 * default zone IDs should be enabled. Unfortunately, some 751 * applications do not behave as it should, so we need a 752 * workaround. Even if an appropriate ID is not determined, 753 * we'll see if we can determine the outgoing interface. If we 754 * can, determine the zone ID based on the interface below. 755 */ 756 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 757 scope_ambiguous = 1; 758 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 759 return error; 760 761 bound = curlwp_bind(); 762 /* Source address selection. XXX: need pcblookup? */ 763 error = in6_selectsrc(addr, in6p->in6p_outputopts, 764 in6p->in6p_moptions, &in6p->in6p_route, 765 &in6p->in6p_laddr, &ifp, &psref, &in6a); 766 if (error != 0) 767 goto out; 768 /* XXX: see above */ 769 if (ifp && scope_ambiguous && 770 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 771 goto out; 772 } 773 in6p->in6p_laddr = in6a; 774 in6p->in6p_faddr = addr->sin6_addr; 775 soisconnected(so); 776 out: 777 if_put(ifp, &psref); 778 curlwp_bindx(bound); 779 return error; 780 } 781 782 static int 783 rip6_connect2(struct socket *so, struct socket *so2) 784 { 785 KASSERT(solocked(so)); 786 787 return EOPNOTSUPP; 788 } 789 790 static int 791 rip6_disconnect(struct socket *so) 792 { 793 struct in6pcb *in6p = sotoin6pcb(so); 794 795 KASSERT(solocked(so)); 796 KASSERT(in6p != NULL); 797 798 if ((so->so_state & SS_ISCONNECTED) == 0) 799 return ENOTCONN; 800 801 in6p->in6p_faddr = in6addr_any; 802 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 803 return 0; 804 } 805 806 static int 807 rip6_shutdown(struct socket *so) 808 { 809 KASSERT(solocked(so)); 810 811 /* 812 * Mark the connection as being incapable of futther input. 813 */ 814 socantsendmore(so); 815 return 0; 816 } 817 818 static int 819 rip6_abort(struct socket *so) 820 { 821 KASSERT(solocked(so)); 822 823 soisdisconnected(so); 824 rip6_detach(so); 825 return 0; 826 } 827 828 static int 829 rip6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 830 { 831 return in6_control(so, cmd, nam, ifp); 832 } 833 834 static int 835 rip6_stat(struct socket *so, struct stat *ub) 836 { 837 KASSERT(solocked(so)); 838 839 /* stat: don't bother with a blocksize */ 840 return 0; 841 } 842 843 static int 844 rip6_peeraddr(struct socket *so, struct sockaddr *nam) 845 { 846 KASSERT(solocked(so)); 847 KASSERT(sotoin6pcb(so) != NULL); 848 KASSERT(nam != NULL); 849 850 in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 851 return 0; 852 } 853 854 static int 855 rip6_sockaddr(struct socket *so, struct sockaddr *nam) 856 { 857 KASSERT(solocked(so)); 858 KASSERT(sotoin6pcb(so) != NULL); 859 KASSERT(nam != NULL); 860 861 in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam); 862 return 0; 863 } 864 865 static int 866 rip6_rcvd(struct socket *so, int flags, struct lwp *l) 867 { 868 KASSERT(solocked(so)); 869 870 return EOPNOTSUPP; 871 } 872 873 static int 874 rip6_recvoob(struct socket *so, struct mbuf *m, int flags) 875 { 876 KASSERT(solocked(so)); 877 878 return EOPNOTSUPP; 879 } 880 881 static int 882 rip6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 883 struct mbuf *control, struct lwp *l) 884 { 885 struct in6pcb *in6p = sotoin6pcb(so); 886 struct sockaddr_in6 tmp; 887 struct sockaddr_in6 *dst; 888 int error = 0; 889 890 KASSERT(solocked(so)); 891 KASSERT(in6p != NULL); 892 KASSERT(m != NULL); 893 894 /* 895 * Ship a packet out. The appropriate raw output 896 * routine handles any messaging necessary. 897 */ 898 899 /* always copy sockaddr to avoid overwrites */ 900 if (so->so_state & SS_ISCONNECTED) { 901 if (nam) { 902 error = EISCONN; 903 goto release; 904 } 905 /* XXX */ 906 sockaddr_in6_init(&tmp, &in6p->in6p_faddr, 0, 0, 0); 907 dst = &tmp; 908 } else { 909 if (nam == NULL) { 910 error = ENOTCONN; 911 goto release; 912 } 913 tmp = *(struct sockaddr_in6 *)nam; 914 dst = &tmp; 915 916 if (dst->sin6_family != AF_INET6) { 917 error = EAFNOSUPPORT; 918 goto release; 919 } 920 } 921 error = rip6_output(m, so, dst, control); 922 m = NULL; 923 924 release: 925 if (m) 926 m_freem(m); 927 928 return error; 929 } 930 931 static int 932 rip6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 933 { 934 KASSERT(solocked(so)); 935 936 m_freem(m); 937 m_freem(control); 938 939 return EOPNOTSUPP; 940 } 941 942 static int 943 rip6_purgeif(struct socket *so, struct ifnet *ifp) 944 { 945 946 mutex_enter(softnet_lock); 947 in6_pcbpurgeif0(&raw6cbtable, ifp); 948 #ifdef NET_MPSAFE 949 mutex_exit(softnet_lock); 950 #endif 951 in6_purgeif(ifp); 952 #ifdef NET_MPSAFE 953 mutex_enter(softnet_lock); 954 #endif 955 in6_pcbpurgeif(&raw6cbtable, ifp); 956 mutex_exit(softnet_lock); 957 958 return 0; 959 } 960 961 static int 962 sysctl_net_inet6_raw6_stats(SYSCTLFN_ARGS) 963 { 964 965 return (NETSTAT_SYSCTL(rip6stat_percpu, RIP6_NSTATS)); 966 } 967 968 static void 969 sysctl_net_inet6_raw6_setup(struct sysctllog **clog) 970 { 971 972 sysctl_createv(clog, 0, NULL, NULL, 973 CTLFLAG_PERMANENT, 974 CTLTYPE_NODE, "inet6", NULL, 975 NULL, 0, NULL, 0, 976 CTL_NET, PF_INET6, CTL_EOL); 977 sysctl_createv(clog, 0, NULL, NULL, 978 CTLFLAG_PERMANENT, 979 CTLTYPE_NODE, "raw6", 980 SYSCTL_DESCR("Raw IPv6 settings"), 981 NULL, 0, NULL, 0, 982 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 983 984 sysctl_createv(clog, 0, NULL, NULL, 985 CTLFLAG_PERMANENT, 986 CTLTYPE_STRUCT, "pcblist", 987 SYSCTL_DESCR("Raw IPv6 control block list"), 988 sysctl_inpcblist, 0, &raw6cbtable, 0, 989 CTL_NET, PF_INET6, IPPROTO_RAW, 990 CTL_CREATE, CTL_EOL); 991 sysctl_createv(clog, 0, NULL, NULL, 992 CTLFLAG_PERMANENT, 993 CTLTYPE_STRUCT, "stats", 994 SYSCTL_DESCR("Raw IPv6 statistics"), 995 sysctl_net_inet6_raw6_stats, 0, NULL, 0, 996 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 997 CTL_EOL); 998 } 999 1000 PR_WRAP_USRREQS(rip6) 1001 #define rip6_attach rip6_attach_wrapper 1002 #define rip6_detach rip6_detach_wrapper 1003 #define rip6_accept rip6_accept_wrapper 1004 #define rip6_bind rip6_bind_wrapper 1005 #define rip6_listen rip6_listen_wrapper 1006 #define rip6_connect rip6_connect_wrapper 1007 #define rip6_connect2 rip6_connect2_wrapper 1008 #define rip6_disconnect rip6_disconnect_wrapper 1009 #define rip6_shutdown rip6_shutdown_wrapper 1010 #define rip6_abort rip6_abort_wrapper 1011 #define rip6_ioctl rip6_ioctl_wrapper 1012 #define rip6_stat rip6_stat_wrapper 1013 #define rip6_peeraddr rip6_peeraddr_wrapper 1014 #define rip6_sockaddr rip6_sockaddr_wrapper 1015 #define rip6_rcvd rip6_rcvd_wrapper 1016 #define rip6_recvoob rip6_recvoob_wrapper 1017 #define rip6_send rip6_send_wrapper 1018 #define rip6_sendoob rip6_sendoob_wrapper 1019 #define rip6_purgeif rip6_purgeif_wrapper 1020 1021 const struct pr_usrreqs rip6_usrreqs = { 1022 .pr_attach = rip6_attach, 1023 .pr_detach = rip6_detach, 1024 .pr_accept = rip6_accept, 1025 .pr_bind = rip6_bind, 1026 .pr_listen = rip6_listen, 1027 .pr_connect = rip6_connect, 1028 .pr_connect2 = rip6_connect2, 1029 .pr_disconnect = rip6_disconnect, 1030 .pr_shutdown = rip6_shutdown, 1031 .pr_abort = rip6_abort, 1032 .pr_ioctl = rip6_ioctl, 1033 .pr_stat = rip6_stat, 1034 .pr_peeraddr = rip6_peeraddr, 1035 .pr_sockaddr = rip6_sockaddr, 1036 .pr_rcvd = rip6_rcvd, 1037 .pr_recvoob = rip6_recvoob, 1038 .pr_send = rip6_send, 1039 .pr_sendoob = rip6_sendoob, 1040 .pr_purgeif = rip6_purgeif, 1041 }; 1042
Indexes created Tue Sep 30 20:09:53 GMT 2025