raw_ip6.c revision 1.80
1 /* $NetBSD: raw_ip6.c,v 1.80 2007/01/04 19:07:04 elad 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 1.80 2007/01/04 19:07:04 elad 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 #include <machine/stdarg.h> 102 103 #include "faith.h" 104 #if defined(NFAITH) && 0 < NFAITH 105 #include <net/if_faith.h> 106 #endif 107 108 extern struct inpcbtable rawcbtable; 109 struct inpcbtable raw6cbtable; 110 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 111 112 /* 113 * Raw interface to IP6 protocol. 114 */ 115 116 struct rip6stat rip6stat; 117 118 /* 119 * Initialize raw connection block queue. 120 */ 121 void 122 rip6_init() 123 { 124 125 in6_pcbinit(&raw6cbtable, 1, 1); 126 } 127 128 /* 129 * Setup generic address and protocol structures 130 * for raw_input routine, then pass them along with 131 * mbuf chain. 132 */ 133 int 134 rip6_input(mp, offp, proto) 135 struct mbuf **mp; 136 int *offp, proto; 137 { 138 struct mbuf *m = *mp; 139 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 140 struct inpcb_hdr *inph; 141 struct in6pcb *in6p; 142 struct in6pcb *last = NULL; 143 struct sockaddr_in6 rip6src; 144 struct mbuf *opts = NULL; 145 146 rip6stat.rip6s_ipackets++; 147 148 #if defined(NFAITH) && 0 < NFAITH 149 if (faithprefix(&ip6->ip6_dst)) { 150 /* send icmp6 host unreach? */ 151 m_freem(m); 152 return IPPROTO_DONE; 153 } 154 #endif 155 156 /* Be proactive about malicious use of IPv4 mapped address */ 157 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 158 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 159 /* XXX stat */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 164 bzero(&rip6src, sizeof(rip6src)); 165 rip6src.sin6_len = sizeof(struct sockaddr_in6); 166 rip6src.sin6_family = AF_INET6; 167 rip6src.sin6_addr = ip6->ip6_src; 168 if (sa6_recoverscope(&rip6src) != 0) { 169 /* XXX: should be impossible. */ 170 m_freem(m); 171 return IPPROTO_DONE; 172 } 173 174 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 175 in6p = (struct in6pcb *)inph; 176 if (in6p->in6p_af != AF_INET6) 177 continue; 178 if (in6p->in6p_ip6.ip6_nxt && 179 in6p->in6p_ip6.ip6_nxt != proto) 180 continue; 181 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 182 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 183 continue; 184 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 185 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 186 continue; 187 if (in6p->in6p_cksum != -1) { 188 rip6stat.rip6s_isum++; 189 if (in6_cksum(m, proto, *offp, 190 m->m_pkthdr.len - *offp)) { 191 rip6stat.rip6s_badsum++; 192 continue; 193 } 194 } 195 if (last) { 196 struct mbuf *n; 197 198 #ifdef IPSEC 199 /* 200 * Check AH/ESP integrity. 201 */ 202 if (ipsec6_in_reject(m, last)) { 203 ipsec6stat.in_polvio++; 204 /* do not inject data into pcb */ 205 } else 206 #endif /* IPSEC */ 207 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 208 if (last->in6p_flags & IN6P_CONTROLOPTS) 209 ip6_savecontrol(last, &opts, ip6, n); 210 /* strip intermediate headers */ 211 m_adj(n, *offp); 212 if (sbappendaddr(&last->in6p_socket->so_rcv, 213 (struct sockaddr *)&rip6src, n, opts) == 0) { 214 /* should notify about lost packet */ 215 m_freem(n); 216 if (opts) 217 m_freem(opts); 218 rip6stat.rip6s_fullsock++; 219 } else 220 sorwakeup(last->in6p_socket); 221 opts = NULL; 222 } 223 } 224 last = in6p; 225 } 226 #ifdef IPSEC 227 /* 228 * Check AH/ESP integrity. 229 */ 230 if (last && ipsec6_in_reject(m, last)) { 231 m_freem(m); 232 ipsec6stat.in_polvio++; 233 ip6stat.ip6s_delivered--; 234 /* do not inject data into pcb */ 235 } else 236 #endif /* IPSEC */ 237 if (last) { 238 if (last->in6p_flags & IN6P_CONTROLOPTS) 239 ip6_savecontrol(last, &opts, ip6, m); 240 /* strip intermediate headers */ 241 m_adj(m, *offp); 242 if (sbappendaddr(&last->in6p_socket->so_rcv, 243 (struct sockaddr *)&rip6src, m, opts) == 0) { 244 m_freem(m); 245 if (opts) 246 m_freem(opts); 247 rip6stat.rip6s_fullsock++; 248 } else 249 sorwakeup(last->in6p_socket); 250 } else { 251 rip6stat.rip6s_nosock++; 252 if (m->m_flags & M_MCAST) 253 rip6stat.rip6s_nosockmcast++; 254 if (proto == IPPROTO_NONE) 255 m_freem(m); 256 else { 257 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 258 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 259 icmp6_error(m, ICMP6_PARAM_PROB, 260 ICMP6_PARAMPROB_NEXTHEADER, 261 prvnxtp - mtod(m, u_int8_t *)); 262 } 263 ip6stat.ip6s_delivered--; 264 } 265 return IPPROTO_DONE; 266 } 267 268 void 269 rip6_ctlinput(cmd, sa, d) 270 int cmd; 271 struct sockaddr *sa; 272 void *d; 273 { 274 struct ip6_hdr *ip6; 275 struct ip6ctlparam *ip6cp = NULL; 276 const struct sockaddr_in6 *sa6_src = NULL; 277 void *cmdarg; 278 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 279 int nxt; 280 281 if (sa->sa_family != AF_INET6 || 282 sa->sa_len != sizeof(struct sockaddr_in6)) 283 return; 284 285 if ((unsigned)cmd >= PRC_NCMDS) 286 return; 287 if (PRC_IS_REDIRECT(cmd)) 288 notify = in6_rtchange, d = NULL; 289 else if (cmd == PRC_HOSTDEAD) 290 d = NULL; 291 else if (cmd == PRC_MSGSIZE) 292 ; /* special code is present, see below */ 293 else if (inet6ctlerrmap[cmd] == 0) 294 return; 295 296 /* if the parameter is from icmp6, decode it. */ 297 if (d != NULL) { 298 ip6cp = (struct ip6ctlparam *)d; 299 ip6 = ip6cp->ip6c_ip6; 300 cmdarg = ip6cp->ip6c_cmdarg; 301 sa6_src = ip6cp->ip6c_src; 302 nxt = ip6cp->ip6c_nxt; 303 } else { 304 ip6 = NULL; 305 cmdarg = NULL; 306 sa6_src = &sa6_any; 307 nxt = -1; 308 } 309 310 if (ip6 && cmd == PRC_MSGSIZE) { 311 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 312 int valid = 0; 313 struct in6pcb *in6p; 314 315 /* 316 * Check to see if we have a valid raw IPv6 socket 317 * corresponding to the address in the ICMPv6 message 318 * payload, and the protocol (ip6_nxt) meets the socket. 319 * XXX chase extension headers, or pass final nxt value 320 * from icmp6_notify_error() 321 */ 322 in6p = NULL; 323 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 324 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 325 #if 0 326 if (!in6p) { 327 /* 328 * As the use of sendto(2) is fairly popular, 329 * we may want to allow non-connected pcb too. 330 * But it could be too weak against attacks... 331 * We should at least check if the local 332 * address (= s) is really ours. 333 */ 334 in6p = in6_pcblookup_bind(&raw6cbtable, 335 &sa6->sin6_addr, 0, 0); 336 } 337 #endif 338 339 if (in6p && in6p->in6p_ip6.ip6_nxt && 340 in6p->in6p_ip6.ip6_nxt == nxt) 341 valid++; 342 343 /* 344 * Depending on the value of "valid" and routing table 345 * size (mtudisc_{hi,lo}wat), we will: 346 * - recalculate the new MTU and create the 347 * corresponding routing entry, or 348 * - ignore the MTU change notification. 349 */ 350 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 351 352 /* 353 * regardless of if we called icmp6_mtudisc_update(), 354 * we need to call in6_pcbnotify(), to notify path MTU 355 * change to the userland (RFC3542), because some 356 * unconnected sockets may share the same destination 357 * and want to know the path MTU. 358 */ 359 } 360 361 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 362 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 363 } 364 365 /* 366 * Generate IPv6 header and pass packet to ip6_output. 367 * Tack on options user may have setup with control call. 368 */ 369 int 370 #if __STDC__ 371 rip6_output(struct mbuf *m, ...) 372 #else 373 rip6_output(m, va_alist) 374 struct mbuf *m; 375 va_dcl 376 #endif 377 { 378 struct socket *so; 379 struct sockaddr_in6 *dstsock; 380 struct mbuf *control; 381 struct in6_addr *dst; 382 struct ip6_hdr *ip6; 383 struct in6pcb *in6p; 384 u_int plen = m->m_pkthdr.len; 385 int error = 0; 386 struct ip6_pktopts opt, *optp = NULL; 387 struct ifnet *oifp = NULL; 388 int type, code; /* for ICMPv6 output statistics only */ 389 int priv = 0; 390 int scope_ambiguous = 0; 391 struct in6_addr *in6a; 392 va_list ap; 393 394 va_start(ap, m); 395 so = va_arg(ap, struct socket *); 396 dstsock = va_arg(ap, struct sockaddr_in6 *); 397 control = va_arg(ap, struct mbuf *); 398 va_end(ap); 399 400 in6p = sotoin6pcb(so); 401 402 priv = 0; 403 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 404 KAUTH_GENERIC_ISSUSER, NULL)) 405 priv = 1; 406 407 dst = &dstsock->sin6_addr; 408 if (control) { 409 if ((error = ip6_setpktopts(control, &opt, 410 in6p->in6p_outputopts, 411 priv, so->so_proto->pr_protocol)) != 0) { 412 goto bad; 413 } 414 optp = &opt; 415 } else 416 optp = in6p->in6p_outputopts; 417 418 /* 419 * Check and convert scope zone ID into internal form. 420 * XXX: we may still need to determine the zone later. 421 */ 422 if (!(so->so_state & SS_ISCONNECTED)) { 423 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 424 scope_ambiguous = 1; 425 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 426 goto bad; 427 } 428 429 /* 430 * For an ICMPv6 packet, we should know its type and code 431 * to update statistics. 432 */ 433 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 434 struct icmp6_hdr *icmp6; 435 if (m->m_len < sizeof(struct icmp6_hdr) && 436 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 437 error = ENOBUFS; 438 goto bad; 439 } 440 icmp6 = mtod(m, struct icmp6_hdr *); 441 type = icmp6->icmp6_type; 442 code = icmp6->icmp6_code; 443 } else { 444 type = 0; 445 code = 0; 446 } 447 448 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 449 if (!m) { 450 error = ENOBUFS; 451 goto bad; 452 } 453 ip6 = mtod(m, struct ip6_hdr *); 454 455 /* 456 * Next header might not be ICMP6 but use its pseudo header anyway. 457 */ 458 ip6->ip6_dst = *dst; 459 460 /* 461 * Source address selection. 462 */ 463 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 464 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &error)) == 0) { 465 if (error == 0) 466 error = EADDRNOTAVAIL; 467 goto bad; 468 } 469 ip6->ip6_src = *in6a; 470 471 if (oifp && scope_ambiguous) { 472 /* 473 * Application should provide a proper zone ID or the use of 474 * default zone IDs should be enabled. Unfortunately, some 475 * applications do not behave as it should, so we need a 476 * workaround. Even if an appropriate ID is not determined 477 * (when it's required), if we can determine the outgoing 478 * interface. determine the zone ID based on the interface. 479 */ 480 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 481 if (error != 0) 482 goto bad; 483 } 484 ip6->ip6_dst = dstsock->sin6_addr; 485 486 /* fill in the rest of the IPv6 header fields */ 487 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 488 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 489 ip6->ip6_vfc |= IPV6_VERSION; 490 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 491 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 492 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 493 494 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 495 in6p->in6p_cksum != -1) { 496 int off; 497 u_int16_t sum; 498 499 /* compute checksum */ 500 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 501 off = offsetof(struct icmp6_hdr, icmp6_cksum); 502 else 503 off = in6p->in6p_cksum; 504 if (plen < off + 1) { 505 error = EINVAL; 506 goto bad; 507 } 508 off += sizeof(struct ip6_hdr); 509 510 sum = 0; 511 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 512 M_DONTWAIT); 513 if (m == NULL) { 514 error = ENOBUFS; 515 goto bad; 516 } 517 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 518 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 519 M_DONTWAIT); 520 if (m == NULL) { 521 error = ENOBUFS; 522 goto bad; 523 } 524 } 525 526 error = ip6_output(m, optp, &in6p->in6p_route, 0, 527 in6p->in6p_moptions, so, &oifp); 528 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 529 if (oifp) 530 icmp6_ifoutstat_inc(oifp, type, code); 531 icmp6stat.icp6s_outhist[type]++; 532 } else 533 rip6stat.rip6s_opackets++; 534 535 goto freectl; 536 537 bad: 538 if (m) 539 m_freem(m); 540 541 freectl: 542 if (control) { 543 ip6_clearpktopts(&opt, -1); 544 m_freem(control); 545 } 546 return (error); 547 } 548 549 /* 550 * Raw IPv6 socket option processing. 551 */ 552 int 553 rip6_ctloutput(op, so, level, optname, mp) 554 int op; 555 struct socket *so; 556 int level, optname; 557 struct mbuf **mp; 558 { 559 int error = 0; 560 561 switch (level) { 562 case IPPROTO_IPV6: 563 switch (optname) { 564 case MRT6_INIT: 565 case MRT6_DONE: 566 case MRT6_ADD_MIF: 567 case MRT6_DEL_MIF: 568 case MRT6_ADD_MFC: 569 case MRT6_DEL_MFC: 570 case MRT6_PIM: 571 if (op == PRCO_SETOPT) { 572 error = ip6_mrouter_set(optname, so, *mp); 573 if (*mp) 574 (void)m_free(*mp); 575 } else if (op == PRCO_GETOPT) 576 error = ip6_mrouter_get(optname, so, mp); 577 else 578 error = EINVAL; 579 return (error); 580 case IPV6_CHECKSUM: 581 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 582 default: 583 return (ip6_ctloutput(op, so, level, optname, mp)); 584 } 585 586 case IPPROTO_ICMPV6: 587 /* 588 * XXX: is it better to call icmp6_ctloutput() directly 589 * from protosw? 590 */ 591 return (icmp6_ctloutput(op, so, level, optname, mp)); 592 593 default: 594 if (op == PRCO_SETOPT && *mp) 595 m_free(*mp); 596 return EINVAL; 597 } 598 } 599 600 extern u_long rip6_sendspace; 601 extern u_long rip6_recvspace; 602 603 int 604 rip6_usrreq(so, req, m, nam, control, l) 605 struct socket *so; 606 int req; 607 struct mbuf *m, *nam, *control; 608 struct lwp *l; 609 { 610 struct in6pcb *in6p = sotoin6pcb(so); 611 int s; 612 int error = 0; 613 int priv; 614 615 priv = 0; 616 if (l && !kauth_authorize_generic(l->l_cred, 617 KAUTH_GENERIC_ISSUSER, NULL)) 618 priv++; 619 620 if (req == PRU_CONTROL) 621 return (in6_control(so, (u_long)m, (caddr_t)nam, 622 (struct ifnet *)control, l)); 623 624 if (req == PRU_PURGEIF) { 625 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 626 in6_purgeif((struct ifnet *)control); 627 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 628 return (0); 629 } 630 631 switch (req) { 632 case PRU_ATTACH: 633 if (in6p) 634 panic("rip6_attach"); 635 if (!priv) { 636 error = EACCES; 637 break; 638 } 639 s = splsoftnet(); 640 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 641 splx(s); 642 break; 643 } 644 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) 645 { 646 splx(s); 647 break; 648 } 649 splx(s); 650 in6p = sotoin6pcb(so); 651 in6p->in6p_ip6.ip6_nxt = (long)nam; 652 in6p->in6p_cksum = -1; 653 654 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 655 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 656 if (in6p->in6p_icmp6filt == NULL) { 657 in6_pcbdetach(in6p); 658 error = ENOMEM; 659 break; 660 } 661 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 662 break; 663 664 case PRU_DISCONNECT: 665 if ((so->so_state & SS_ISCONNECTED) == 0) { 666 error = ENOTCONN; 667 break; 668 } 669 in6p->in6p_faddr = in6addr_any; 670 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 671 break; 672 673 case PRU_ABORT: 674 soisdisconnected(so); 675 /* Fallthrough */ 676 case PRU_DETACH: 677 if (in6p == 0) 678 panic("rip6_detach"); 679 if (so == ip6_mrouter) 680 ip6_mrouter_done(); 681 /* xxx: RSVP */ 682 if (in6p->in6p_icmp6filt) { 683 FREE(in6p->in6p_icmp6filt, M_PCB); 684 in6p->in6p_icmp6filt = NULL; 685 } 686 in6_pcbdetach(in6p); 687 break; 688 689 case PRU_BIND: 690 { 691 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 692 struct ifaddr *ia = NULL; 693 694 if (nam->m_len != sizeof(*addr)) { 695 error = EINVAL; 696 break; 697 } 698 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 699 error = EADDRNOTAVAIL; 700 break; 701 } 702 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 703 break; 704 705 /* 706 * we don't support mapped address here, it would confuse 707 * users so reject it 708 */ 709 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 710 error = EADDRNOTAVAIL; 711 break; 712 } 713 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 714 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 715 error = EADDRNOTAVAIL; 716 break; 717 } 718 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 719 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 720 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 721 error = EADDRNOTAVAIL; 722 break; 723 } 724 in6p->in6p_laddr = addr->sin6_addr; 725 break; 726 } 727 728 case PRU_CONNECT: 729 { 730 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 731 struct in6_addr *in6a = NULL; 732 struct ifnet *ifp = NULL; 733 int scope_ambiguous = 0; 734 735 if (nam->m_len != sizeof(*addr)) { 736 error = EINVAL; 737 break; 738 } 739 if (TAILQ_EMPTY(&ifnet)) { 740 error = EADDRNOTAVAIL; 741 break; 742 } 743 if (addr->sin6_family != AF_INET6) { 744 error = EAFNOSUPPORT; 745 break; 746 } 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 /* Source address selection. XXX: need pcblookup? */ 762 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 763 in6p->in6p_moptions, &in6p->in6p_route, 764 &in6p->in6p_laddr, &ifp, &error); 765 if (in6a == NULL) { 766 if (error == 0) 767 error = EADDRNOTAVAIL; 768 break; 769 } 770 /* XXX: see above */ 771 if (ifp && scope_ambiguous && 772 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 773 break; 774 } 775 in6p->in6p_laddr = *in6a; 776 in6p->in6p_faddr = addr->sin6_addr; 777 soisconnected(so); 778 break; 779 } 780 781 case PRU_CONNECT2: 782 error = EOPNOTSUPP; 783 break; 784 785 /* 786 * Mark the connection as being incapable of futther input. 787 */ 788 case PRU_SHUTDOWN: 789 socantsendmore(so); 790 break; 791 /* 792 * Ship a packet out. The appropriate raw output 793 * routine handles any messaging necessary. 794 */ 795 case PRU_SEND: 796 { 797 struct sockaddr_in6 tmp; 798 struct sockaddr_in6 *dst; 799 800 /* always copy sockaddr to avoid overwrites */ 801 if (so->so_state & SS_ISCONNECTED) { 802 if (nam) { 803 error = EISCONN; 804 break; 805 } 806 /* XXX */ 807 bzero(&tmp, sizeof(tmp)); 808 tmp.sin6_family = AF_INET6; 809 tmp.sin6_len = sizeof(struct sockaddr_in6); 810 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 811 sizeof(struct in6_addr)); 812 dst = &tmp; 813 } else { 814 if (nam == NULL) { 815 error = ENOTCONN; 816 break; 817 } 818 if (nam->m_len != sizeof(tmp)) { 819 error = EINVAL; 820 break; 821 } 822 823 tmp = *mtod(nam, struct sockaddr_in6 *); 824 dst = &tmp; 825 826 if (dst->sin6_family != AF_INET6) { 827 error = EAFNOSUPPORT; 828 break; 829 } 830 } 831 error = rip6_output(m, so, dst, control); 832 m = NULL; 833 break; 834 } 835 836 case PRU_SENSE: 837 /* 838 * stat: don't bother with a blocksize 839 */ 840 return (0); 841 /* 842 * Not supported. 843 */ 844 case PRU_RCVOOB: 845 case PRU_RCVD: 846 case PRU_LISTEN: 847 case PRU_ACCEPT: 848 case PRU_SENDOOB: 849 error = EOPNOTSUPP; 850 break; 851 852 case PRU_SOCKADDR: 853 in6_setsockaddr(in6p, nam); 854 break; 855 856 case PRU_PEERADDR: 857 in6_setpeeraddr(in6p, nam); 858 break; 859 860 default: 861 panic("rip6_usrreq"); 862 } 863 if (m != NULL) 864 m_freem(m); 865 return (error); 866 } 867 868 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 869 { 870 871 sysctl_createv(clog, 0, NULL, NULL, 872 CTLFLAG_PERMANENT, 873 CTLTYPE_NODE, "net", NULL, 874 NULL, 0, NULL, 0, 875 CTL_NET, CTL_EOL); 876 sysctl_createv(clog, 0, NULL, NULL, 877 CTLFLAG_PERMANENT, 878 CTLTYPE_NODE, "inet6", NULL, 879 NULL, 0, NULL, 0, 880 CTL_NET, PF_INET6, CTL_EOL); 881 sysctl_createv(clog, 0, NULL, NULL, 882 CTLFLAG_PERMANENT, 883 CTLTYPE_NODE, "raw6", 884 SYSCTL_DESCR("Raw IPv6 settings"), 885 NULL, 0, NULL, 0, 886 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 887 888 sysctl_createv(clog, 0, NULL, NULL, 889 CTLFLAG_PERMANENT, 890 CTLTYPE_STRUCT, "pcblist", 891 SYSCTL_DESCR("Raw IPv6 control block list"), 892 sysctl_inpcblist, 0, &raw6cbtable, 0, 893 CTL_NET, PF_INET6, IPPROTO_RAW, 894 CTL_CREATE, CTL_EOL); 895 sysctl_createv(clog, 0, NULL, NULL, 896 CTLFLAG_PERMANENT, 897 CTLTYPE_STRUCT, "stats", 898 SYSCTL_DESCR("Raw IPv6 statistics"), 899 NULL, 0, &rip6stat, sizeof(rip6stat), 900 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 901 CTL_EOL); 902 } 903
Indexes created Tue Sep 23 22:09:46 GMT 2025