raw_ip6.c revision 1.83
1 /* $NetBSD: raw_ip6.c,v 1.83 2007/02/22 09:30:33 dyoung 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 1.83 2007/02/22 09:30:33 dyoung 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 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip6.h> 88 #include <netinet6/ip6_var.h> 89 #include <netinet6/ip6_mroute.h> 90 #include <netinet/icmp6.h> 91 #include <netinet6/in6_pcb.h> 92 #include <netinet6/nd6.h> 93 #include <netinet6/ip6protosw.h> 94 #include <netinet6/scope6_var.h> 95 #include <netinet6/raw_ip6.h> 96 97 #ifdef IPSEC 98 #include <netinet6/ipsec.h> 99 #endif /* IPSEC */ 100 101 #ifdef FAST_IPSEC 102 #include <netipsec/ipsec.h> 103 #include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */ 104 #include <netipsec/ipsec6.h> 105 #endif 106 107 #include <machine/stdarg.h> 108 109 #include "faith.h" 110 #if defined(NFAITH) && 0 < NFAITH 111 #include <net/if_faith.h> 112 #endif 113 114 extern struct inpcbtable rawcbtable; 115 struct inpcbtable raw6cbtable; 116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 117 118 /* 119 * Raw interface to IP6 protocol. 120 */ 121 122 struct rip6stat rip6stat; 123 124 /* 125 * Initialize raw connection block queue. 126 */ 127 void 128 rip6_init() 129 { 130 131 in6_pcbinit(&raw6cbtable, 1, 1); 132 } 133 134 /* 135 * Setup generic address and protocol structures 136 * for raw_input routine, then pass them along with 137 * mbuf chain. 138 */ 139 int 140 rip6_input(mp, offp, proto) 141 struct mbuf **mp; 142 int *offp, proto; 143 { 144 struct mbuf *m = *mp; 145 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 146 struct inpcb_hdr *inph; 147 struct in6pcb *in6p; 148 struct in6pcb *last = NULL; 149 struct sockaddr_in6 rip6src; 150 struct mbuf *opts = NULL; 151 152 rip6stat.rip6s_ipackets++; 153 154 #if defined(NFAITH) && 0 < NFAITH 155 if (faithprefix(&ip6->ip6_dst)) { 156 /* send icmp6 host unreach? */ 157 m_freem(m); 158 return IPPROTO_DONE; 159 } 160 #endif 161 162 /* Be proactive about malicious use of IPv4 mapped address */ 163 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 164 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 165 /* XXX stat */ 166 m_freem(m); 167 return IPPROTO_DONE; 168 } 169 170 bzero(&rip6src, sizeof(rip6src)); 171 rip6src.sin6_len = sizeof(struct sockaddr_in6); 172 rip6src.sin6_family = AF_INET6; 173 rip6src.sin6_addr = ip6->ip6_src; 174 if (sa6_recoverscope(&rip6src) != 0) { 175 /* XXX: should be impossible. */ 176 m_freem(m); 177 return IPPROTO_DONE; 178 } 179 180 CIRCLEQ_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 rip6stat.rip6s_isum++; 195 if (in6_cksum(m, proto, *offp, 196 m->m_pkthdr.len - *offp)) { 197 rip6stat.rip6s_badsum++; 198 continue; 199 } 200 } 201 if (last) { 202 struct mbuf *n; 203 204 #ifdef IPSEC 205 /* 206 * Check AH/ESP integrity. 207 */ 208 if (ipsec6_in_reject(m, last)) { 209 ipsec6stat.in_polvio++; 210 /* do not inject data into pcb */ 211 } else 212 #endif /* IPSEC */ 213 #ifdef FAST_IPSEC 214 /* 215 * Check AH/ESP integrity 216 */ 217 if (!ipsec6_in_reject(m,last)) 218 #endif /* FAST_IPSEC */ 219 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 220 if (last->in6p_flags & IN6P_CONTROLOPTS) 221 ip6_savecontrol(last, &opts, ip6, n); 222 /* strip intermediate headers */ 223 m_adj(n, *offp); 224 if (sbappendaddr(&last->in6p_socket->so_rcv, 225 (struct sockaddr *)&rip6src, n, opts) == 0) { 226 /* should notify about lost packet */ 227 m_freem(n); 228 if (opts) 229 m_freem(opts); 230 rip6stat.rip6s_fullsock++; 231 } else 232 sorwakeup(last->in6p_socket); 233 opts = NULL; 234 } 235 } 236 last = in6p; 237 } 238 #ifdef IPSEC 239 /* 240 * Check AH/ESP integrity. 241 */ 242 if (last && ipsec6_in_reject(m, last)) { 243 m_freem(m); 244 ipsec6stat.in_polvio++; 245 ip6stat.ip6s_delivered--; 246 /* do not inject data into pcb */ 247 } else 248 #endif /* IPSEC */ 249 #ifdef FAST_IPSEC 250 if (last && ipsec6_in_reject(m, last)) { 251 m_freem(m); 252 /* 253 * XXX ipsec6_in_reject update stat if there is an error 254 * so we just need to update stats by hand in the case of last is 255 * NULL 256 */ 257 if (!last) 258 ipsec6stat.in_polvio++; 259 ip6stat.ip6s_delivered--; 260 /* do not inject data into pcb */ 261 } else 262 #endif /* FAST_IPSEC */ 263 if (last) { 264 if (last->in6p_flags & IN6P_CONTROLOPTS) 265 ip6_savecontrol(last, &opts, ip6, m); 266 /* strip intermediate headers */ 267 m_adj(m, *offp); 268 if (sbappendaddr(&last->in6p_socket->so_rcv, 269 (struct sockaddr *)&rip6src, m, opts) == 0) { 270 m_freem(m); 271 if (opts) 272 m_freem(opts); 273 rip6stat.rip6s_fullsock++; 274 } else 275 sorwakeup(last->in6p_socket); 276 } else { 277 rip6stat.rip6s_nosock++; 278 if (m->m_flags & M_MCAST) 279 rip6stat.rip6s_nosockmcast++; 280 if (proto == IPPROTO_NONE) 281 m_freem(m); 282 else { 283 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 284 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 285 icmp6_error(m, ICMP6_PARAM_PROB, 286 ICMP6_PARAMPROB_NEXTHEADER, 287 prvnxtp - mtod(m, u_int8_t *)); 288 } 289 ip6stat.ip6s_delivered--; 290 } 291 return IPPROTO_DONE; 292 } 293 294 void 295 rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d) 296 { 297 struct ip6_hdr *ip6; 298 struct ip6ctlparam *ip6cp = NULL; 299 const struct sockaddr_in6 *sa6_src = NULL; 300 void *cmdarg; 301 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 302 int nxt; 303 304 if (sa->sa_family != AF_INET6 || 305 sa->sa_len != sizeof(struct sockaddr_in6)) 306 return; 307 308 if ((unsigned)cmd >= PRC_NCMDS) 309 return; 310 if (PRC_IS_REDIRECT(cmd)) 311 notify = in6_rtchange, d = NULL; 312 else if (cmd == PRC_HOSTDEAD) 313 d = NULL; 314 else if (cmd == PRC_MSGSIZE) 315 ; /* special code is present, see below */ 316 else if (inet6ctlerrmap[cmd] == 0) 317 return; 318 319 /* if the parameter is from icmp6, decode it. */ 320 if (d != NULL) { 321 ip6cp = (struct ip6ctlparam *)d; 322 ip6 = ip6cp->ip6c_ip6; 323 cmdarg = ip6cp->ip6c_cmdarg; 324 sa6_src = ip6cp->ip6c_src; 325 nxt = ip6cp->ip6c_nxt; 326 } else { 327 ip6 = NULL; 328 cmdarg = NULL; 329 sa6_src = &sa6_any; 330 nxt = -1; 331 } 332 333 if (ip6 && cmd == PRC_MSGSIZE) { 334 const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa; 335 int valid = 0; 336 struct in6pcb *in6p; 337 338 /* 339 * Check to see if we have a valid raw IPv6 socket 340 * corresponding to the address in the ICMPv6 message 341 * payload, and the protocol (ip6_nxt) meets the socket. 342 * XXX chase extension headers, or pass final nxt value 343 * from icmp6_notify_error() 344 */ 345 in6p = NULL; 346 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 347 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 348 #if 0 349 if (!in6p) { 350 /* 351 * As the use of sendto(2) is fairly popular, 352 * we may want to allow non-connected pcb too. 353 * But it could be too weak against attacks... 354 * We should at least check if the local 355 * address (= s) is really ours. 356 */ 357 in6p = in6_pcblookup_bind(&raw6cbtable, 358 &sa6->sin6_addr, 0, 0); 359 } 360 #endif 361 362 if (in6p && in6p->in6p_ip6.ip6_nxt && 363 in6p->in6p_ip6.ip6_nxt == nxt) 364 valid++; 365 366 /* 367 * Depending on the value of "valid" and routing table 368 * size (mtudisc_{hi,lo}wat), we will: 369 * - recalculate the new MTU and create the 370 * corresponding routing entry, or 371 * - ignore the MTU change notification. 372 */ 373 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 374 375 /* 376 * regardless of if we called icmp6_mtudisc_update(), 377 * we need to call in6_pcbnotify(), to notify path MTU 378 * change to the userland (RFC3542), because some 379 * unconnected sockets may share the same destination 380 * and want to know the path MTU. 381 */ 382 } 383 384 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 385 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 386 } 387 388 /* 389 * Generate IPv6 header and pass packet to ip6_output. 390 * Tack on options user may have setup with control call. 391 */ 392 int 393 #if __STDC__ 394 rip6_output(struct mbuf *m, ...) 395 #else 396 rip6_output(m, va_alist) 397 struct mbuf *m; 398 va_dcl 399 #endif 400 { 401 struct socket *so; 402 struct sockaddr_in6 *dstsock; 403 struct mbuf *control; 404 struct in6_addr *dst; 405 struct ip6_hdr *ip6; 406 struct in6pcb *in6p; 407 u_int plen = m->m_pkthdr.len; 408 int error = 0; 409 struct ip6_pktopts opt, *optp = NULL; 410 struct ifnet *oifp = NULL; 411 int type, code; /* for ICMPv6 output statistics only */ 412 int priv = 0; 413 int scope_ambiguous = 0; 414 struct in6_addr *in6a; 415 va_list ap; 416 417 va_start(ap, m); 418 so = va_arg(ap, struct socket *); 419 dstsock = va_arg(ap, struct sockaddr_in6 *); 420 control = va_arg(ap, struct mbuf *); 421 va_end(ap); 422 423 in6p = sotoin6pcb(so); 424 425 priv = 0; 426 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 427 KAUTH_GENERIC_ISSUSER, NULL)) 428 priv = 1; 429 430 dst = &dstsock->sin6_addr; 431 if (control) { 432 if ((error = ip6_setpktopts(control, &opt, 433 in6p->in6p_outputopts, 434 priv, so->so_proto->pr_protocol)) != 0) { 435 goto bad; 436 } 437 optp = &opt; 438 } else 439 optp = in6p->in6p_outputopts; 440 441 /* 442 * Check and convert scope zone ID into internal form. 443 * XXX: we may still need to determine the zone later. 444 */ 445 if (!(so->so_state & SS_ISCONNECTED)) { 446 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 447 scope_ambiguous = 1; 448 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 449 goto bad; 450 } 451 452 /* 453 * For an ICMPv6 packet, we should know its type and code 454 * to update statistics. 455 */ 456 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 457 struct icmp6_hdr *icmp6; 458 if (m->m_len < sizeof(struct icmp6_hdr) && 459 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 460 error = ENOBUFS; 461 goto bad; 462 } 463 icmp6 = mtod(m, struct icmp6_hdr *); 464 type = icmp6->icmp6_type; 465 code = icmp6->icmp6_code; 466 } else { 467 type = 0; 468 code = 0; 469 } 470 471 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 472 if (!m) { 473 error = ENOBUFS; 474 goto bad; 475 } 476 ip6 = mtod(m, struct ip6_hdr *); 477 478 /* 479 * Next header might not be ICMP6 but use its pseudo header anyway. 480 */ 481 ip6->ip6_dst = *dst; 482 483 /* 484 * Source address selection. 485 */ 486 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 487 (struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp, 488 &error)) == 0) { 489 if (error == 0) 490 error = EADDRNOTAVAIL; 491 goto bad; 492 } 493 ip6->ip6_src = *in6a; 494 495 if (oifp && scope_ambiguous) { 496 /* 497 * Application should provide a proper zone ID or the use of 498 * default zone IDs should be enabled. Unfortunately, some 499 * applications do not behave as it should, so we need a 500 * workaround. Even if an appropriate ID is not determined 501 * (when it's required), if we can determine the outgoing 502 * interface. determine the zone ID based on the interface. 503 */ 504 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 505 if (error != 0) 506 goto bad; 507 } 508 ip6->ip6_dst = dstsock->sin6_addr; 509 510 /* fill in the rest of the IPv6 header fields */ 511 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 512 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 513 ip6->ip6_vfc |= IPV6_VERSION; 514 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 515 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 516 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 517 518 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 519 in6p->in6p_cksum != -1) { 520 int off; 521 u_int16_t sum; 522 523 /* compute checksum */ 524 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 525 off = offsetof(struct icmp6_hdr, icmp6_cksum); 526 else 527 off = in6p->in6p_cksum; 528 if (plen < off + 1) { 529 error = EINVAL; 530 goto bad; 531 } 532 off += sizeof(struct ip6_hdr); 533 534 sum = 0; 535 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 536 M_DONTWAIT); 537 if (m == NULL) { 538 error = ENOBUFS; 539 goto bad; 540 } 541 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 542 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 543 M_DONTWAIT); 544 if (m == NULL) { 545 error = ENOBUFS; 546 goto bad; 547 } 548 } 549 550 error = ip6_output(m, optp, &in6p->in6p_route, 0, 551 in6p->in6p_moptions, so, &oifp); 552 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 553 if (oifp) 554 icmp6_ifoutstat_inc(oifp, type, code); 555 icmp6stat.icp6s_outhist[type]++; 556 } else 557 rip6stat.rip6s_opackets++; 558 559 goto freectl; 560 561 bad: 562 if (m) 563 m_freem(m); 564 565 freectl: 566 if (control) { 567 ip6_clearpktopts(&opt, -1); 568 m_freem(control); 569 } 570 return error; 571 } 572 573 /* 574 * Raw IPv6 socket option processing. 575 */ 576 int 577 rip6_ctloutput(int op, struct socket *so, int level, int optname, 578 struct mbuf **mp) 579 { 580 int error = 0; 581 582 switch (level) { 583 case IPPROTO_IPV6: 584 switch (optname) { 585 case MRT6_INIT: 586 case MRT6_DONE: 587 case MRT6_ADD_MIF: 588 case MRT6_DEL_MIF: 589 case MRT6_ADD_MFC: 590 case MRT6_DEL_MFC: 591 case MRT6_PIM: 592 if (op == PRCO_SETOPT) { 593 error = ip6_mrouter_set(optname, so, *mp); 594 if (*mp) 595 (void)m_free(*mp); 596 } else if (op == PRCO_GETOPT) 597 error = ip6_mrouter_get(optname, so, mp); 598 else 599 error = EINVAL; 600 return error; 601 case IPV6_CHECKSUM: 602 return ip6_raw_ctloutput(op, so, level, optname, mp); 603 default: 604 return ip6_ctloutput(op, so, level, optname, mp); 605 } 606 607 case IPPROTO_ICMPV6: 608 /* 609 * XXX: is it better to call icmp6_ctloutput() directly 610 * from protosw? 611 */ 612 return icmp6_ctloutput(op, so, level, optname, mp); 613 614 default: 615 if (op == PRCO_SETOPT && *mp) 616 m_free(*mp); 617 return EINVAL; 618 } 619 } 620 621 extern u_long rip6_sendspace; 622 extern u_long rip6_recvspace; 623 624 int 625 rip6_usrreq(so, req, m, nam, control, l) 626 struct socket *so; 627 int req; 628 struct mbuf *m, *nam, *control; 629 struct lwp *l; 630 { 631 struct in6pcb *in6p = sotoin6pcb(so); 632 int s; 633 int error = 0; 634 int priv; 635 636 priv = 0; 637 if (l && !kauth_authorize_generic(l->l_cred, 638 KAUTH_GENERIC_ISSUSER, NULL)) 639 priv++; 640 641 if (req == PRU_CONTROL) 642 return in6_control(so, (u_long)m, (caddr_t)nam, 643 (struct ifnet *)control, l); 644 645 if (req == PRU_PURGEIF) { 646 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 647 in6_purgeif((struct ifnet *)control); 648 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 649 return 0; 650 } 651 652 switch (req) { 653 case PRU_ATTACH: 654 if (in6p != NULL) 655 panic("rip6_attach"); 656 if (!priv) { 657 error = EACCES; 658 break; 659 } 660 s = splsoftnet(); 661 error = soreserve(so, rip6_sendspace, rip6_recvspace); 662 if (error != 0) { 663 splx(s); 664 break; 665 } 666 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) { 667 splx(s); 668 break; 669 } 670 splx(s); 671 in6p = sotoin6pcb(so); 672 in6p->in6p_ip6.ip6_nxt = (long)nam; 673 in6p->in6p_cksum = -1; 674 675 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 676 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 677 if (in6p->in6p_icmp6filt == NULL) { 678 in6_pcbdetach(in6p); 679 error = ENOMEM; 680 break; 681 } 682 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 683 break; 684 685 case PRU_DISCONNECT: 686 if ((so->so_state & SS_ISCONNECTED) == 0) { 687 error = ENOTCONN; 688 break; 689 } 690 in6p->in6p_faddr = in6addr_any; 691 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 692 break; 693 694 case PRU_ABORT: 695 soisdisconnected(so); 696 /* Fallthrough */ 697 case PRU_DETACH: 698 if (in6p == NULL) 699 panic("rip6_detach"); 700 if (so == ip6_mrouter) 701 ip6_mrouter_done(); 702 /* xxx: RSVP */ 703 if (in6p->in6p_icmp6filt != NULL) { 704 FREE(in6p->in6p_icmp6filt, M_PCB); 705 in6p->in6p_icmp6filt = NULL; 706 } 707 in6_pcbdetach(in6p); 708 break; 709 710 case PRU_BIND: 711 { 712 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 713 struct ifaddr *ia = NULL; 714 715 if (nam->m_len != sizeof(*addr)) { 716 error = EINVAL; 717 break; 718 } 719 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 720 error = EADDRNOTAVAIL; 721 break; 722 } 723 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 724 break; 725 726 /* 727 * we don't support mapped address here, it would confuse 728 * users so reject it 729 */ 730 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 731 error = EADDRNOTAVAIL; 732 break; 733 } 734 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 735 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 736 error = EADDRNOTAVAIL; 737 break; 738 } 739 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 740 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 741 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 742 error = EADDRNOTAVAIL; 743 break; 744 } 745 in6p->in6p_laddr = addr->sin6_addr; 746 break; 747 } 748 749 case PRU_CONNECT: 750 { 751 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 752 struct in6_addr *in6a = NULL; 753 struct ifnet *ifp = NULL; 754 int scope_ambiguous = 0; 755 756 if (nam->m_len != sizeof(*addr)) { 757 error = EINVAL; 758 break; 759 } 760 if (TAILQ_EMPTY(&ifnet)) { 761 error = EADDRNOTAVAIL; 762 break; 763 } 764 if (addr->sin6_family != AF_INET6) { 765 error = EAFNOSUPPORT; 766 break; 767 } 768 769 /* 770 * Application should provide a proper zone ID or the use of 771 * default zone IDs should be enabled. Unfortunately, some 772 * applications do not behave as it should, so we need a 773 * workaround. Even if an appropriate ID is not determined, 774 * we'll see if we can determine the outgoing interface. If we 775 * can, determine the zone ID based on the interface below. 776 */ 777 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 778 scope_ambiguous = 1; 779 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 780 return error; 781 782 /* Source address selection. XXX: need pcblookup? */ 783 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 784 in6p->in6p_moptions, (struct route *)&in6p->in6p_route, 785 &in6p->in6p_laddr, &ifp, &error); 786 if (in6a == NULL) { 787 if (error == 0) 788 error = EADDRNOTAVAIL; 789 break; 790 } 791 /* XXX: see above */ 792 if (ifp && scope_ambiguous && 793 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 794 break; 795 } 796 in6p->in6p_laddr = *in6a; 797 in6p->in6p_faddr = addr->sin6_addr; 798 soisconnected(so); 799 break; 800 } 801 802 case PRU_CONNECT2: 803 error = EOPNOTSUPP; 804 break; 805 806 /* 807 * Mark the connection as being incapable of futther input. 808 */ 809 case PRU_SHUTDOWN: 810 socantsendmore(so); 811 break; 812 /* 813 * Ship a packet out. The appropriate raw output 814 * routine handles any messaging necessary. 815 */ 816 case PRU_SEND: 817 { 818 struct sockaddr_in6 tmp; 819 struct sockaddr_in6 *dst; 820 821 /* always copy sockaddr to avoid overwrites */ 822 if (so->so_state & SS_ISCONNECTED) { 823 if (nam) { 824 error = EISCONN; 825 break; 826 } 827 /* XXX */ 828 bzero(&tmp, sizeof(tmp)); 829 tmp.sin6_family = AF_INET6; 830 tmp.sin6_len = sizeof(struct sockaddr_in6); 831 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 832 sizeof(struct in6_addr)); 833 dst = &tmp; 834 } else { 835 if (nam == NULL) { 836 error = ENOTCONN; 837 break; 838 } 839 if (nam->m_len != sizeof(tmp)) { 840 error = EINVAL; 841 break; 842 } 843 844 tmp = *mtod(nam, struct sockaddr_in6 *); 845 dst = &tmp; 846 847 if (dst->sin6_family != AF_INET6) { 848 error = EAFNOSUPPORT; 849 break; 850 } 851 } 852 error = rip6_output(m, so, dst, control); 853 m = NULL; 854 break; 855 } 856 857 case PRU_SENSE: 858 /* 859 * stat: don't bother with a blocksize 860 */ 861 return 0; 862 /* 863 * Not supported. 864 */ 865 case PRU_RCVOOB: 866 case PRU_RCVD: 867 case PRU_LISTEN: 868 case PRU_ACCEPT: 869 case PRU_SENDOOB: 870 error = EOPNOTSUPP; 871 break; 872 873 case PRU_SOCKADDR: 874 in6_setsockaddr(in6p, nam); 875 break; 876 877 case PRU_PEERADDR: 878 in6_setpeeraddr(in6p, nam); 879 break; 880 881 default: 882 panic("rip6_usrreq"); 883 } 884 if (m != NULL) 885 m_freem(m); 886 return error; 887 } 888 889 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 890 { 891 892 sysctl_createv(clog, 0, NULL, NULL, 893 CTLFLAG_PERMANENT, 894 CTLTYPE_NODE, "net", NULL, 895 NULL, 0, NULL, 0, 896 CTL_NET, CTL_EOL); 897 sysctl_createv(clog, 0, NULL, NULL, 898 CTLFLAG_PERMANENT, 899 CTLTYPE_NODE, "inet6", NULL, 900 NULL, 0, NULL, 0, 901 CTL_NET, PF_INET6, CTL_EOL); 902 sysctl_createv(clog, 0, NULL, NULL, 903 CTLFLAG_PERMANENT, 904 CTLTYPE_NODE, "raw6", 905 SYSCTL_DESCR("Raw IPv6 settings"), 906 NULL, 0, NULL, 0, 907 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 908 909 sysctl_createv(clog, 0, NULL, NULL, 910 CTLFLAG_PERMANENT, 911 CTLTYPE_STRUCT, "pcblist", 912 SYSCTL_DESCR("Raw IPv6 control block list"), 913 sysctl_inpcblist, 0, &raw6cbtable, 0, 914 CTL_NET, PF_INET6, IPPROTO_RAW, 915 CTL_CREATE, CTL_EOL); 916 sysctl_createv(clog, 0, NULL, NULL, 917 CTLFLAG_PERMANENT, 918 CTLTYPE_STRUCT, "stats", 919 SYSCTL_DESCR("Raw IPv6 statistics"), 920 NULL, 0, &rip6stat, sizeof(rip6stat), 921 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 922 CTL_EOL); 923 } 924
Indexes created Tue Sep 23 22:09:46 GMT 2025