raw_ip6.c revision 1.75.2.2
1 /* $NetBSD: raw_ip6.c,v 1.75.2.2 2006/02/14 02:19:32 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 1.75.2.2 2006/02/14 02:19:32 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 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/in_pcb.h> 88 #include <netinet/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/ip6_mroute.h> 91 #include <netinet/icmp6.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 in_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 *inp; 141 struct inpcb *last = NULL; 142 struct sockaddr_in6 rip6src; 143 struct mbuf *opts = NULL; 144 145 rip6stat.rip6s_ipackets++; 146 147 #if defined(NFAITH) && 0 < NFAITH 148 if (faithprefix(&ip6->ip6_dst)) { 149 /* send icmp6 host unreach? */ 150 m_freem(m); 151 return IPPROTO_DONE; 152 } 153 #endif 154 155 /* Be proactive about malicious use of IPv4 mapped address */ 156 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 157 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 158 /* XXX stat */ 159 m_freem(m); 160 return IPPROTO_DONE; 161 } 162 163 bzero(&rip6src, sizeof(rip6src)); 164 rip6src.sin6_len = sizeof(struct sockaddr_in6); 165 rip6src.sin6_family = AF_INET6; 166 rip6src.sin6_addr = ip6->ip6_src; 167 if (sa6_recoverscope(&rip6src) != 0) { 168 /* XXX: should be impossible. */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 CIRCLEQ_FOREACH(inp, &raw6cbtable.inpt_queue, inp_queue) { 174 if (inp->inp_af != AF_INET6) 175 continue; 176 if (inp->in6p_ip6.ip6_nxt && 177 inp->in6p_ip6.ip6_nxt != proto) 178 continue; 179 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 180 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst)) 181 continue; 182 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 183 !IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src)) 184 continue; 185 if (inp->in6p_cksum != -1) { 186 rip6stat.rip6s_isum++; 187 if (in6_cksum(m, proto, *offp, 188 m->m_pkthdr.len - *offp)) { 189 rip6stat.rip6s_badsum++; 190 continue; 191 } 192 } 193 if (last) { 194 struct mbuf *n; 195 196 #ifdef IPSEC 197 /* 198 * Check AH/ESP integrity. 199 */ 200 if (ipsec6_in_reject(m, last)) { 201 ipsec6stat.in_polvio++; 202 /* do not inject data into pcb */ 203 } else 204 #endif /* IPSEC */ 205 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 206 if (last->inp_flags & IN6P_CONTROLOPTS) 207 ip6_savecontrol(last, &opts, ip6, n); 208 /* strip intermediate headers */ 209 m_adj(n, *offp); 210 if (sbappendaddr(&last->inp_socket->so_rcv, 211 (struct sockaddr *)&rip6src, n, opts) == 0) { 212 /* should notify about lost packet */ 213 m_freem(n); 214 if (opts) 215 m_freem(opts); 216 rip6stat.rip6s_fullsock++; 217 } else 218 sorwakeup(last->in6p_socket); 219 opts = NULL; 220 } 221 } 222 last = inp; 223 } 224 #ifdef IPSEC 225 /* 226 * Check AH/ESP integrity. 227 */ 228 if (last && ipsec6_in_reject(m, last)) { 229 m_freem(m); 230 ipsec6stat.in_polvio++; 231 ip6stat.ip6s_delivered--; 232 /* do not inject data into pcb */ 233 } else 234 #endif /* IPSEC */ 235 if (last) { 236 if (last->inp_flags & IN6P_CONTROLOPTS) 237 ip6_savecontrol(last, &opts, ip6, m); 238 /* strip intermediate headers */ 239 m_adj(m, *offp); 240 if (sbappendaddr(&last->inp_socket->so_rcv, 241 (struct sockaddr *)&rip6src, m, opts) == 0) { 242 m_freem(m); 243 if (opts) 244 m_freem(opts); 245 rip6stat.rip6s_fullsock++; 246 } else 247 sorwakeup(last->inp_socket); 248 } else { 249 rip6stat.rip6s_nosock++; 250 if (m->m_flags & M_MCAST) 251 rip6stat.rip6s_nosockmcast++; 252 if (proto == IPPROTO_NONE) 253 m_freem(m); 254 else { 255 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 256 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 257 icmp6_error(m, ICMP6_PARAM_PROB, 258 ICMP6_PARAMPROB_NEXTHEADER, 259 prvnxtp - mtod(m, u_int8_t *)); 260 } 261 ip6stat.ip6s_delivered--; 262 } 263 return IPPROTO_DONE; 264 } 265 266 void 267 rip6_ctlinput(cmd, sa, d) 268 int cmd; 269 struct sockaddr *sa; 270 void *d; 271 { 272 struct ip6_hdr *ip6; 273 struct ip6ctlparam *ip6cp = NULL; 274 const struct sockaddr_in6 *sa6_src = NULL; 275 void *cmdarg; 276 void (*notify) __P((struct inpcb *, int)) = in6_rtchange; 277 int nxt; 278 279 if (sa->sa_family != AF_INET6 || 280 sa->sa_len != sizeof(struct sockaddr_in6)) 281 return; 282 283 if ((unsigned)cmd >= PRC_NCMDS) 284 return; 285 if (PRC_IS_REDIRECT(cmd)) 286 notify = in6_rtchange, d = NULL; 287 else if (cmd == PRC_HOSTDEAD) 288 d = NULL; 289 else if (cmd == PRC_MSGSIZE) 290 ; /* special code is present, see below */ 291 else if (inet6ctlerrmap[cmd] == 0) 292 return; 293 294 /* if the parameter is from icmp6, decode it. */ 295 if (d != NULL) { 296 ip6cp = (struct ip6ctlparam *)d; 297 ip6 = ip6cp->ip6c_ip6; 298 cmdarg = ip6cp->ip6c_cmdarg; 299 sa6_src = ip6cp->ip6c_src; 300 nxt = ip6cp->ip6c_nxt; 301 } else { 302 ip6 = NULL; 303 cmdarg = NULL; 304 sa6_src = &sa6_any; 305 nxt = -1; 306 } 307 308 if (ip6 && cmd == PRC_MSGSIZE) { 309 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 310 int valid = 0; 311 struct inpcb *inp; 312 313 /* 314 * Check to see if we have a valid raw IPv6 socket 315 * corresponding to the address in the ICMPv6 message 316 * payload, and the protocol (ip6_nxt) meets the socket. 317 * XXX chase extension headers, or pass final nxt value 318 * from icmp6_notify_error() 319 */ 320 inp = NULL; 321 inp = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 322 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 323 #if 0 324 if (!inp) { 325 /* 326 * As the use of sendto(2) is fairly popular, 327 * we may want to allow non-connected pcb too. 328 * But it could be too weak against attacks... 329 * We should at least check if the local 330 * address (= s) is really ours. 331 */ 332 inp = in6_pcblookup_bind(&raw6cbtable, 333 &sa6->sin6_addr, 0, 0); 334 } 335 #endif 336 337 if (inp && inp->in6p_ip6.ip6_nxt && 338 inp->in6p_ip6.ip6_nxt == nxt) 339 valid++; 340 341 /* 342 * Depending on the value of "valid" and routing table 343 * size (mtudisc_{hi,lo}wat), we will: 344 * - recalculate the new MTU and create the 345 * corresponding routing entry, or 346 * - ignore the MTU change notification. 347 */ 348 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 349 350 /* 351 * regardless of if we called icmp6_mtudisc_update(), 352 * we need to call in6_pcbnotify(), to notify path 353 * MTU change to the userland (2292bis-02), because 354 * some unconnected sockets may share the same 355 * destination and want to know the path MTU. 356 */ 357 } 358 359 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 360 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 361 } 362 363 /* 364 * Generate IPv6 header and pass packet to ip6_output. 365 * Tack on options user may have setup with control call. 366 */ 367 int 368 #if __STDC__ 369 rip6_output(struct mbuf *m, ...) 370 #else 371 rip6_output(m, va_alist) 372 struct mbuf *m; 373 va_dcl 374 #endif 375 { 376 struct socket *so; 377 struct sockaddr_in6 *dstsock; 378 struct mbuf *control; 379 struct in6_addr *dst; 380 struct ip6_hdr *ip6; 381 struct in6pcb *in6p; 382 u_int plen = m->m_pkthdr.len; 383 int error = 0; 384 struct ip6_pktopts opt, *optp = NULL; 385 struct ifnet *oifp = NULL; 386 int type, code; /* for ICMPv6 output statistics only */ 387 int priv = 0; 388 int scope_ambiguous = 0; 389 struct in6_addr *in6a; 390 va_list ap; 391 int flags; 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 in6p = sotoin6pcb(so); 400 401 priv = 0; 402 if (curproc && !suser(curproc->p_ucred, &curproc->p_acflag)) 403 priv = 1; 404 405 dst = &dstsock->sin6_addr; 406 if (control) { 407 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 408 goto bad; 409 optp = &opt; 410 } else 411 optp = in6p->in6p_outputopts; 412 413 /* 414 * Check and convert scope zone ID into internal form. 415 * XXX: we may still need to determine the zone later. 416 */ 417 if (!(so->so_state & SS_ISCONNECTED)) { 418 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 419 scope_ambiguous = 1; 420 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 421 goto bad; 422 } 423 424 /* 425 * For an ICMPv6 packet, we should know its type and code 426 * to update statistics. 427 */ 428 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 429 struct icmp6_hdr *icmp6; 430 if (m->m_len < sizeof(struct icmp6_hdr) && 431 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 432 error = ENOBUFS; 433 goto bad; 434 } 435 icmp6 = mtod(m, struct icmp6_hdr *); 436 type = icmp6->icmp6_type; 437 code = icmp6->icmp6_code; 438 } else { 439 type = 0; 440 code = 0; 441 } 442 443 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 444 if (!m) { 445 error = ENOBUFS; 446 goto bad; 447 } 448 ip6 = mtod(m, struct ip6_hdr *); 449 450 /* 451 * Next header might not be ICMP6 but use its pseudo header anyway. 452 */ 453 ip6->ip6_dst = *dst; 454 455 /* 456 * Source address selection. 457 */ 458 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 459 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &error)) == 0) { 460 if (error == 0) 461 error = EADDRNOTAVAIL; 462 goto bad; 463 } 464 ip6->ip6_src = *in6a; 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 (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 490 in6p->in6p_cksum != -1) { 491 int off; 492 u_int16_t sum; 493 494 /* compute checksum */ 495 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 496 off = offsetof(struct icmp6_hdr, icmp6_cksum); 497 else 498 off = in6p->in6p_cksum; 499 if (plen < off + 1) { 500 error = EINVAL; 501 goto bad; 502 } 503 off += sizeof(struct ip6_hdr); 504 505 sum = 0; 506 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 507 M_DONTWAIT); 508 if (m == NULL) { 509 error = ENOBUFS; 510 goto bad; 511 } 512 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 513 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 514 M_DONTWAIT); 515 if (m == NULL) { 516 error = ENOBUFS; 517 goto bad; 518 } 519 } 520 521 flags = 0; 522 if (in6p->in6p_flags & IN6P_MINMTU) 523 flags |= IPV6_MINMTU; 524 525 error = ip6_output(m, optp, &in6p->in6p_route, flags, 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 (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 542 RTFREE(optp->ip6po_route.ro_rt); 543 if (control) 544 m_freem(control); 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 in6pcb *in6p = sotoin6pcb(so); 610 struct proc *p; 611 int s; 612 int error = 0; 613 int priv; 614 615 priv = 0; 616 p = l ? l->l_proc : NULL; 617 if (p && !suser(p->p_ucred, &p->p_acflag)) 618 priv++; 619 620 if (req == PRU_CONTROL) 621 return (in6_control(so, (u_long)m, (caddr_t)nam, 622 (struct ifnet *)control, p)); 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 = in_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 ((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 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 (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, in6p->in6p_outputopts, 764 in6p->in6p_moptions, &in6p->in6p_route, 765 &in6p->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 in6p->in6p_laddr = *in6a; 777 in6p->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(&in6p->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(in6p, nam); 855 break; 856 857 case PRU_PEERADDR: 858 in6_setpeeraddr(in6p, 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