raw_ip6.c revision 1.75.2.4
1 /* $NetBSD: raw_ip6.c,v 1.75.2.4 2006/09/09 02:58:55 rpaulo 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 1.75.2.4 2006/09/09 02:58:55 rpaulo Exp $"); 66 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/sysctl.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/socket.h> 75 #include <sys/protosw.h> 76 #include <sys/socketvar.h> 77 #include <sys/errno.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/kauth.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/if_types.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_pcb.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/nd6.h> 94 #include <netinet6/ip6protosw.h> 95 #include <netinet6/scope6_var.h> 96 #include <netinet6/raw_ip6.h> 97 98 #ifdef IPSEC 99 #include <netinet6/ipsec.h> 100 #endif /* IPSEC */ 101 102 #include <machine/stdarg.h> 103 104 #include "faith.h" 105 #if defined(NFAITH) && 0 < NFAITH 106 #include <net/if_faith.h> 107 #endif 108 109 extern struct inpcbtable rawcbtable; 110 struct inpcbtable raw6cbtable; 111 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 112 113 /* 114 * Raw interface to IP6 protocol. 115 */ 116 117 struct rip6stat rip6stat; 118 119 /* 120 * Initialize raw connection block queue. 121 */ 122 void 123 rip6_init() 124 { 125 126 in_pcbinit(&raw6cbtable, 1, 1); 127 } 128 129 /* 130 * Setup generic address and protocol structures 131 * for raw_input routine, then pass them along with 132 * mbuf chain. 133 */ 134 int 135 rip6_input(mp, offp, proto) 136 struct mbuf **mp; 137 int *offp, proto; 138 { 139 struct mbuf *m = *mp; 140 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141 struct inpcb *inp; 142 struct inpcb *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(inp, &raw6cbtable.inpt_queue, inp_queue) { 175 if (inp->inp_af != AF_INET6) 176 continue; 177 if (inp->in6p_ip6.ip6_nxt && 178 inp->in6p_ip6.ip6_nxt != proto) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 181 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 182 continue; 183 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 184 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 185 continue; 186 if (inp->in6p_cksum != -1) { 187 rip6stat.rip6s_isum++; 188 if (in6_cksum(m, proto, *offp, 189 m->m_pkthdr.len - *offp)) { 190 rip6stat.rip6s_badsum++; 191 continue; 192 } 193 } 194 if (last) { 195 struct mbuf *n; 196 197 #ifdef IPSEC 198 /* 199 * Check AH/ESP integrity. 200 */ 201 if (ipsec6_in_reject(m, last)) { 202 ipsec6stat.in_polvio++; 203 /* do not inject data into pcb */ 204 } else 205 #endif /* IPSEC */ 206 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 207 if (last->inp_flags & IN6P_CONTROLOPTS) 208 ip6_savecontrol(last, &opts, ip6, n); 209 /* strip intermediate headers */ 210 m_adj(n, *offp); 211 if (sbappendaddr(&last->inp_socket->so_rcv, 212 (struct sockaddr *)&rip6src, n, opts) == 0) { 213 /* should notify about lost packet */ 214 m_freem(n); 215 if (opts) 216 m_freem(opts); 217 rip6stat.rip6s_fullsock++; 218 } else 219 sorwakeup(last->inp_socket); 220 opts = NULL; 221 } 222 } 223 last = inp; 224 } 225 #ifdef IPSEC 226 /* 227 * Check AH/ESP integrity. 228 */ 229 if (last && ipsec6_in_reject(m, last)) { 230 m_freem(m); 231 ipsec6stat.in_polvio++; 232 ip6stat.ip6s_delivered--; 233 /* do not inject data into pcb */ 234 } else 235 #endif /* IPSEC */ 236 if (last) { 237 if (last->inp_flags & IN6P_CONTROLOPTS) 238 ip6_savecontrol(last, &opts, ip6, m); 239 /* strip intermediate headers */ 240 m_adj(m, *offp); 241 if (sbappendaddr(&last->inp_socket->so_rcv, 242 (struct sockaddr *)&rip6src, m, opts) == 0) { 243 m_freem(m); 244 if (opts) 245 m_freem(opts); 246 rip6stat.rip6s_fullsock++; 247 } else 248 sorwakeup(last->inp_socket); 249 } else { 250 rip6stat.rip6s_nosock++; 251 if (m->m_flags & M_MCAST) 252 rip6stat.rip6s_nosockmcast++; 253 if (proto == IPPROTO_NONE) 254 m_freem(m); 255 else { 256 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 257 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 258 icmp6_error(m, ICMP6_PARAM_PROB, 259 ICMP6_PARAMPROB_NEXTHEADER, 260 prvnxtp - mtod(m, u_int8_t *)); 261 } 262 ip6stat.ip6s_delivered--; 263 } 264 return IPPROTO_DONE; 265 } 266 267 void 268 rip6_ctlinput(cmd, sa, d) 269 int cmd; 270 struct sockaddr *sa; 271 void *d; 272 { 273 struct ip6_hdr *ip6; 274 struct ip6ctlparam *ip6cp = NULL; 275 const struct sockaddr_in6 *sa6_src = NULL; 276 void *cmdarg; 277 void (*notify) __P((struct inpcb *, int)) = in6_rtchange; 278 int nxt; 279 280 if (sa->sa_family != AF_INET6 || 281 sa->sa_len != sizeof(struct sockaddr_in6)) 282 return; 283 284 if ((unsigned)cmd >= PRC_NCMDS) 285 return; 286 if (PRC_IS_REDIRECT(cmd)) 287 notify = in6_rtchange, d = NULL; 288 else if (cmd == PRC_HOSTDEAD) 289 d = NULL; 290 else if (cmd == PRC_MSGSIZE) 291 ; /* special code is present, see below */ 292 else if (inet6ctlerrmap[cmd] == 0) 293 return; 294 295 /* if the parameter is from icmp6, decode it. */ 296 if (d != NULL) { 297 ip6cp = (struct ip6ctlparam *)d; 298 ip6 = ip6cp->ip6c_ip6; 299 cmdarg = ip6cp->ip6c_cmdarg; 300 sa6_src = ip6cp->ip6c_src; 301 nxt = ip6cp->ip6c_nxt; 302 } else { 303 ip6 = NULL; 304 cmdarg = NULL; 305 sa6_src = &sa6_any; 306 nxt = -1; 307 } 308 309 if (ip6 && cmd == PRC_MSGSIZE) { 310 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 311 int valid = 0; 312 struct inpcb *inp; 313 314 /* 315 * Check to see if we have a valid raw IPv6 socket 316 * corresponding to the address in the ICMPv6 message 317 * payload, and the protocol (ip6_nxt) meets the socket. 318 * XXX chase extension headers, or pass final nxt value 319 * from icmp6_notify_error() 320 */ 321 inp = NULL; 322 inp = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 323 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 324 #if 0 325 if (!inp) { 326 /* 327 * As the use of sendto(2) is fairly popular, 328 * we may want to allow non-connected pcb too. 329 * But it could be too weak against attacks... 330 * We should at least check if the local 331 * address (= s) is really ours. 332 */ 333 inp = in6_pcblookup_bind(&raw6cbtable, 334 &sa6->sin6_addr, 0, 0); 335 } 336 #endif 337 338 if (inp && inp->in6p_ip6.ip6_nxt && 339 inp->in6p_ip6.ip6_nxt == nxt) 340 valid++; 341 342 /* 343 * Depending on the value of "valid" and routing table 344 * size (mtudisc_{hi,lo}wat), we will: 345 * - recalculate the new MTU and create the 346 * corresponding routing entry, or 347 * - ignore the MTU change notification. 348 */ 349 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 350 351 /* 352 * regardless of if we called icmp6_mtudisc_update(), 353 * we need to call in6_pcbnotify(), to notify path MTU 354 * change to the userland (RFC3542), because some 355 * unconnected sockets may share the same destination 356 * and want to know the path MTU. 357 */ 358 } 359 360 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 361 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 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 #if __STDC__ 370 rip6_output(struct mbuf *m, ...) 371 #else 372 rip6_output(m, va_alist) 373 struct mbuf *m; 374 va_dcl 375 #endif 376 { 377 struct socket *so; 378 struct sockaddr_in6 *dstsock; 379 struct mbuf *control; 380 struct in6_addr *dst; 381 struct ip6_hdr *ip6; 382 struct inpcb *inp; 383 u_int plen = m->m_pkthdr.len; 384 int error = 0; 385 struct ip6_pktopts opt, *optp = NULL; 386 struct ifnet *oifp = NULL; 387 int type, code; /* for ICMPv6 output statistics only */ 388 int priv = 0; 389 int scope_ambiguous = 0; 390 struct in6_addr *in6a; 391 va_list ap; 392 393 va_start(ap, m); 394 so = va_arg(ap, struct socket *); 395 dstsock = va_arg(ap, struct sockaddr_in6 *); 396 control = va_arg(ap, struct mbuf *); 397 va_end(ap); 398 399 inp = sotoinpcb(so); 400 401 priv = 0; 402 if (curlwp && !kauth_authorize_generic(curlwp->l_cred, 403 KAUTH_GENERIC_ISSUSER, &curlwp->l_acflag)) 404 priv = 1; 405 406 dst = &dstsock->sin6_addr; 407 if (control) { 408 if ((error = ip6_setpktopts(control, &opt, 409 in6p->in6p_outputopts, 410 priv, so->so_proto->pr_protocol)) != 0) { 411 goto bad; 412 } 413 optp = &opt; 414 } else 415 optp = inp->in6p_outputopts; 416 417 /* 418 * Check and convert scope zone ID into internal form. 419 * XXX: we may still need to determine the zone later. 420 */ 421 if (!(so->so_state & SS_ISCONNECTED)) { 422 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 423 scope_ambiguous = 1; 424 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 425 goto bad; 426 } 427 428 /* 429 * For an ICMPv6 packet, we should know its type and code 430 * to update statistics. 431 */ 432 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 433 struct icmp6_hdr *icmp6; 434 if (m->m_len < sizeof(struct icmp6_hdr) && 435 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 436 error = ENOBUFS; 437 goto bad; 438 } 439 icmp6 = mtod(m, struct icmp6_hdr *); 440 type = icmp6->icmp6_type; 441 code = icmp6->icmp6_code; 442 } else { 443 type = 0; 444 code = 0; 445 } 446 447 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 448 if (!m) { 449 error = ENOBUFS; 450 goto bad; 451 } 452 ip6 = mtod(m, struct ip6_hdr *); 453 454 /* 455 * Next header might not be ICMP6 but use its pseudo header anyway. 456 */ 457 ip6->ip6_dst = *dst; 458 459 /* 460 * Source address selection. 461 */ 462 if ((in6a = in6_selectsrc(dstsock, optp, inp->in6p_moptions, 463 &inp->in6p_route, &inp->in6p_laddr, &oifp, &error)) == 0) { 464 if (error == 0) 465 error = EADDRNOTAVAIL; 466 goto bad; 467 } 468 ip6->ip6_src = *in6a; 469 470 if (oifp && scope_ambiguous) { 471 /* 472 * Application should provide a proper zone ID or the use of 473 * default zone IDs should be enabled. Unfortunately, some 474 * applications do not behave as it should, so we need a 475 * workaround. Even if an appropriate ID is not determined 476 * (when it's required), if we can determine the outgoing 477 * interface. determine the zone ID based on the interface. 478 */ 479 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 480 if (error != 0) 481 goto bad; 482 } 483 ip6->ip6_dst = dstsock->sin6_addr; 484 485 /* fill in the rest of the IPv6 header fields */ 486 ip6->ip6_flow = inp->in6p_flowinfo & IPV6_FLOWINFO_MASK; 487 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 488 ip6->ip6_vfc |= IPV6_VERSION; 489 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 490 ip6->ip6_nxt = inp->in6p_ip6.ip6_nxt; 491 ip6->ip6_hlim = in6_selecthlim(inp, oifp); 492 493 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 494 inp->in6p_cksum != -1) { 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 = inp->in6p_cksum; 503 if (plen < off + 1) { 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), (caddr_t)&sum, 511 M_DONTWAIT); 512 if (m == NULL) { 513 error = ENOBUFS; 514 goto bad; 515 } 516 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 517 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 518 M_DONTWAIT); 519 if (m == NULL) { 520 error = ENOBUFS; 521 goto bad; 522 } 523 } 524 525 error = ip6_output(m, optp, &inp->in6p_route, 0, 526 in6p->in6p_moptions, so, &oifp); 527 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 528 if (oifp) 529 icmp6_ifoutstat_inc(oifp, type, code); 530 icmp6stat.icp6s_outhist[type]++; 531 } else 532 rip6stat.rip6s_opackets++; 533 534 goto freectl; 535 536 bad: 537 if (m) 538 m_freem(m); 539 540 freectl: 541 if (control) { 542 ip6_clearpktopts(&opt, -1); 543 m_freem(control); 544 } 545 return (error); 546 } 547 548 /* 549 * Raw IPv6 socket option processing. 550 */ 551 int 552 rip6_ctloutput(op, so, level, optname, mp) 553 int op; 554 struct socket *so; 555 int level, optname; 556 struct mbuf **mp; 557 { 558 int error = 0; 559 560 switch (level) { 561 case IPPROTO_IPV6: 562 switch (optname) { 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(optname, so, *mp); 572 if (*mp) 573 (void)m_free(*mp); 574 } else if (op == PRCO_GETOPT) 575 error = ip6_mrouter_get(optname, so, mp); 576 else 577 error = EINVAL; 578 return (error); 579 case IPV6_CHECKSUM: 580 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 581 default: 582 return (ip6_ctloutput(op, so, level, optname, mp)); 583 } 584 585 case IPPROTO_ICMPV6: 586 /* 587 * XXX: is it better to call icmp6_ctloutput() directly 588 * from protosw? 589 */ 590 return (icmp6_ctloutput(op, so, level, optname, mp)); 591 592 default: 593 if (op == PRCO_SETOPT && *mp) 594 m_free(*mp); 595 return EINVAL; 596 } 597 } 598 599 extern u_long rip6_sendspace; 600 extern u_long rip6_recvspace; 601 602 int 603 rip6_usrreq(so, req, m, nam, control, l) 604 struct socket *so; 605 int req; 606 struct mbuf *m, *nam, *control; 607 struct lwp *l; 608 { 609 struct inpcb *inp = sotoinpcb(so); 610 struct proc *p; 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, &l->l_acflag)) 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 (inp) 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 = in_pcballoc(so, &raw6cbtable)) != 0) 645 { 646 splx(s); 647 break; 648 } 649 splx(s); 650 inp = sotoinpcb(so); 651 inp->in6p_ip6.ip6_nxt = (long)nam; 652 inp->in6p_cksum = -1; 653 654 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 655 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 656 if (inp->in6p_icmp6filt == NULL) { 657 in6_pcbdetach(inp); 658 error = ENOMEM; 659 break; 660 } 661 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 662 break; 663 664 case PRU_DISCONNECT: 665 if ((so->so_state & SS_ISCONNECTED) == 0) { 666 error = ENOTCONN; 667 break; 668 } 669 inp->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 (inp == 0) 678 panic("rip6_detach"); 679 if (so == ip6_mrouter) 680 ip6_mrouter_done(); 681 /* xxx: RSVP */ 682 if (inp->in6p_icmp6filt) { 683 FREE(inp->in6p_icmp6filt, M_PCB); 684 inp->in6p_icmp6filt = NULL; 685 } 686 in6_pcbdetach(inp); 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 ((ifnet.tqh_first == 0) || (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 inp->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 (ifnet.tqh_first == 0) 740 { 741 error = EADDRNOTAVAIL; 742 break; 743 } 744 if (addr->sin6_family != AF_INET6) { 745 error = EAFNOSUPPORT; 746 break; 747 } 748 749 /* 750 * Application should provide a proper zone ID or the use of 751 * default zone IDs should be enabled. Unfortunately, some 752 * applications do not behave as it should, so we need a 753 * workaround. Even if an appropriate ID is not determined, 754 * we'll see if we can determine the outgoing interface. If we 755 * can, determine the zone ID based on the interface below. 756 */ 757 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 758 scope_ambiguous = 1; 759 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 760 return(error); 761 762 /* Source address selection. XXX: need pcblookup? */ 763 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 764 inp->in6p_moptions, &inp->in6p_route, 765 &inp->in6p_laddr, &ifp, &error); 766 if (in6a == NULL) { 767 if (error == 0) 768 error = EADDRNOTAVAIL; 769 break; 770 } 771 /* XXX: see above */ 772 if (ifp && scope_ambiguous && 773 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 774 break; 775 } 776 inp->in6p_laddr = *in6a; 777 inp->in6p_faddr = addr->sin6_addr; 778 soisconnected(so); 779 break; 780 } 781 782 case PRU_CONNECT2: 783 error = EOPNOTSUPP; 784 break; 785 786 /* 787 * Mark the connection as being incapable of futther input. 788 */ 789 case PRU_SHUTDOWN: 790 socantsendmore(so); 791 break; 792 /* 793 * Ship a packet out. The appropriate raw output 794 * routine handles any messaging necessary. 795 */ 796 case PRU_SEND: 797 { 798 struct sockaddr_in6 tmp; 799 struct sockaddr_in6 *dst; 800 801 /* always copy sockaddr to avoid overwrites */ 802 if (so->so_state & SS_ISCONNECTED) { 803 if (nam) { 804 error = EISCONN; 805 break; 806 } 807 /* XXX */ 808 bzero(&tmp, sizeof(tmp)); 809 tmp.sin6_family = AF_INET6; 810 tmp.sin6_len = sizeof(struct sockaddr_in6); 811 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 812 sizeof(struct in6_addr)); 813 dst = &tmp; 814 } else { 815 if (nam == NULL) { 816 error = ENOTCONN; 817 break; 818 } 819 if (nam->m_len != sizeof(tmp)) { 820 error = EINVAL; 821 break; 822 } 823 824 tmp = *mtod(nam, struct sockaddr_in6 *); 825 dst = &tmp; 826 827 if (dst->sin6_family != AF_INET6) { 828 error = EAFNOSUPPORT; 829 break; 830 } 831 } 832 error = rip6_output(m, so, dst, control); 833 m = NULL; 834 break; 835 } 836 837 case PRU_SENSE: 838 /* 839 * stat: don't bother with a blocksize 840 */ 841 return (0); 842 /* 843 * Not supported. 844 */ 845 case PRU_RCVOOB: 846 case PRU_RCVD: 847 case PRU_LISTEN: 848 case PRU_ACCEPT: 849 case PRU_SENDOOB: 850 error = EOPNOTSUPP; 851 break; 852 853 case PRU_SOCKADDR: 854 in6_setsockaddr(inp, nam); 855 break; 856 857 case PRU_PEERADDR: 858 in6_setpeeraddr(inp, nam); 859 break; 860 861 default: 862 panic("rip6_usrreq"); 863 } 864 if (m != NULL) 865 m_freem(m); 866 return (error); 867 } 868 869 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 870 { 871 872 sysctl_createv(clog, 0, NULL, NULL, 873 CTLFLAG_PERMANENT, 874 CTLTYPE_NODE, "net", NULL, 875 NULL, 0, NULL, 0, 876 CTL_NET, CTL_EOL); 877 sysctl_createv(clog, 0, NULL, NULL, 878 CTLFLAG_PERMANENT, 879 CTLTYPE_NODE, "inet6", NULL, 880 NULL, 0, NULL, 0, 881 CTL_NET, PF_INET6, CTL_EOL); 882 sysctl_createv(clog, 0, NULL, NULL, 883 CTLFLAG_PERMANENT, 884 CTLTYPE_NODE, "raw6", 885 SYSCTL_DESCR("Raw IPv6 settings"), 886 NULL, 0, NULL, 0, 887 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 888 889 sysctl_createv(clog, 0, NULL, NULL, 890 CTLFLAG_PERMANENT, 891 CTLTYPE_STRUCT, "pcblist", 892 SYSCTL_DESCR("Raw IPv6 control block list"), 893 sysctl_inpcblist, 0, &raw6cbtable, 0, 894 CTL_NET, PF_INET6, IPPROTO_RAW, 895 CTL_CREATE, CTL_EOL); 896 sysctl_createv(clog, 0, NULL, NULL, 897 CTLFLAG_PERMANENT, 898 CTLTYPE_STRUCT, "stats", 899 SYSCTL_DESCR("Raw IPv6 statistics"), 900 NULL, 0, &rip6stat, sizeof(rip6stat), 901 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 902 CTL_EOL); 903 } 904
Indexes created Tue Sep 30 20:09:53 GMT 2025