raw_ip6.c revision 1.76
1 /* $NetBSD: raw_ip6.c,v 1.76 2006/05/05 00:03:22 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 1.76 2006/05/05 00:03:22 rpaulo 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 80 #include <net/if.h> 81 #include <net/route.h> 82 #include <net/if_types.h> 83 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 #include <netinet/ip6.h> 87 #include <netinet6/ip6_var.h> 88 #include <netinet6/ip6_mroute.h> 89 #include <netinet/icmp6.h> 90 #include <netinet6/in6_pcb.h> 91 #include <netinet6/nd6.h> 92 #include <netinet6/ip6protosw.h> 93 #include <netinet6/scope6_var.h> 94 #include <netinet6/raw_ip6.h> 95 96 #ifdef IPSEC 97 #include <netinet6/ipsec.h> 98 #endif /* IPSEC */ 99 100 #include <machine/stdarg.h> 101 102 #include "faith.h" 103 #if defined(NFAITH) && 0 < NFAITH 104 #include <net/if_faith.h> 105 #endif 106 107 extern struct inpcbtable rawcbtable; 108 struct inpcbtable raw6cbtable; 109 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 110 111 /* 112 * Raw interface to IP6 protocol. 113 */ 114 115 struct rip6stat rip6stat; 116 117 /* 118 * Initialize raw connection block queue. 119 */ 120 void 121 rip6_init() 122 { 123 124 in6_pcbinit(&raw6cbtable, 1, 1); 125 } 126 127 /* 128 * Setup generic address and protocol structures 129 * for raw_input routine, then pass them along with 130 * mbuf chain. 131 */ 132 int 133 rip6_input(mp, offp, proto) 134 struct mbuf **mp; 135 int *offp, proto; 136 { 137 struct mbuf *m = *mp; 138 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 139 struct inpcb_hdr *inph; 140 struct in6pcb *in6p; 141 struct in6pcb *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(inph, &raw6cbtable.inpt_queue, inph_queue) { 174 in6p = (struct in6pcb *)inph; 175 if (in6p->in6p_af != AF_INET6) 176 continue; 177 if (in6p->in6p_ip6.ip6_nxt && 178 in6p->in6p_ip6.ip6_nxt != proto) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 181 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 182 continue; 183 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 184 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 185 continue; 186 if (in6p->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->in6p_flags & IN6P_CONTROLOPTS) 208 ip6_savecontrol(last, &opts, ip6, n); 209 /* strip intermediate headers */ 210 m_adj(n, *offp); 211 if (sbappendaddr(&last->in6p_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->in6p_socket); 220 opts = NULL; 221 } 222 } 223 last = in6p; 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->in6p_flags & IN6P_CONTROLOPTS) 238 ip6_savecontrol(last, &opts, ip6, m); 239 /* strip intermediate headers */ 240 m_adj(m, *offp); 241 if (sbappendaddr(&last->in6p_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->in6p_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 in6pcb *, 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 in6pcb *in6p; 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 in6p = NULL; 322 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 323 (const struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 324 #if 0 325 if (!in6p) { 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 in6p = in6_pcblookup_bind(&raw6cbtable, 334 &sa6->sin6_addr, 0, 0); 335 } 336 #endif 337 338 if (in6p && in6p->in6p_ip6.ip6_nxt && 339 in6p->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 in6pcb *in6p; 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 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_setpktopts(control, &opt, 408 in6p->in6p_outputopts, 409 priv, so->so_proto->pr_protocol)) != 0) { 410 goto bad; 411 } 412 optp = &opt; 413 } else 414 optp = in6p->in6p_outputopts; 415 416 /* 417 * Check and convert scope zone ID into internal form. 418 * XXX: we may still need to determine the zone later. 419 */ 420 if (!(so->so_state & SS_ISCONNECTED)) { 421 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 422 scope_ambiguous = 1; 423 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 424 goto bad; 425 } 426 427 /* 428 * For an ICMPv6 packet, we should know its type and code 429 * to update statistics. 430 */ 431 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 432 struct icmp6_hdr *icmp6; 433 if (m->m_len < sizeof(struct icmp6_hdr) && 434 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 435 error = ENOBUFS; 436 goto bad; 437 } 438 icmp6 = mtod(m, struct icmp6_hdr *); 439 type = icmp6->icmp6_type; 440 code = icmp6->icmp6_code; 441 } else { 442 type = 0; 443 code = 0; 444 } 445 446 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 447 if (!m) { 448 error = ENOBUFS; 449 goto bad; 450 } 451 ip6 = mtod(m, struct ip6_hdr *); 452 453 /* 454 * Next header might not be ICMP6 but use its pseudo header anyway. 455 */ 456 ip6->ip6_dst = *dst; 457 458 /* 459 * Source address selection. 460 */ 461 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 462 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &error)) == 0) { 463 if (error == 0) 464 error = EADDRNOTAVAIL; 465 goto bad; 466 } 467 ip6->ip6_src = *in6a; 468 469 if (oifp && scope_ambiguous) { 470 /* 471 * Application should provide a proper zone ID or the use of 472 * default zone IDs should be enabled. Unfortunately, some 473 * applications do not behave as it should, so we need a 474 * workaround. Even if an appropriate ID is not determined 475 * (when it's required), if we can determine the outgoing 476 * interface. determine the zone ID based on the interface. 477 */ 478 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 479 if (error != 0) 480 goto bad; 481 } 482 ip6->ip6_dst = dstsock->sin6_addr; 483 484 /* fill in the rest of the IPv6 header fields */ 485 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 486 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 487 ip6->ip6_vfc |= IPV6_VERSION; 488 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 489 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 490 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 491 492 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 493 in6p->in6p_cksum != -1) { 494 int off; 495 u_int16_t sum; 496 497 /* compute checksum */ 498 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 499 off = offsetof(struct icmp6_hdr, icmp6_cksum); 500 else 501 off = in6p->in6p_cksum; 502 if (plen < off + 1) { 503 error = EINVAL; 504 goto bad; 505 } 506 off += sizeof(struct ip6_hdr); 507 508 sum = 0; 509 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 510 M_DONTWAIT); 511 if (m == NULL) { 512 error = ENOBUFS; 513 goto bad; 514 } 515 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 516 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 517 M_DONTWAIT); 518 if (m == NULL) { 519 error = ENOBUFS; 520 goto bad; 521 } 522 } 523 524 error = ip6_output(m, optp, &in6p->in6p_route, 0, 525 in6p->in6p_moptions, so, &oifp); 526 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 527 if (oifp) 528 icmp6_ifoutstat_inc(oifp, type, code); 529 icmp6stat.icp6s_outhist[type]++; 530 } else 531 rip6stat.rip6s_opackets++; 532 533 goto freectl; 534 535 bad: 536 if (m) 537 m_freem(m); 538 539 freectl: 540 if (control) { 541 ip6_clearpktopts(&opt, -1); 542 m_freem(control); 543 } 544 return (error); 545 } 546 547 /* 548 * Raw IPv6 socket option processing. 549 */ 550 int 551 rip6_ctloutput(op, so, level, optname, mp) 552 int op; 553 struct socket *so; 554 int level, optname; 555 struct mbuf **mp; 556 { 557 int error = 0; 558 559 switch (level) { 560 case IPPROTO_IPV6: 561 switch (optname) { 562 case MRT6_INIT: 563 case MRT6_DONE: 564 case MRT6_ADD_MIF: 565 case MRT6_DEL_MIF: 566 case MRT6_ADD_MFC: 567 case MRT6_DEL_MFC: 568 case MRT6_PIM: 569 if (op == PRCO_SETOPT) { 570 error = ip6_mrouter_set(optname, so, *mp); 571 if (*mp) 572 (void)m_free(*mp); 573 } else if (op == PRCO_GETOPT) 574 error = ip6_mrouter_get(optname, so, mp); 575 else 576 error = EINVAL; 577 return (error); 578 case IPV6_CHECKSUM: 579 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 580 default: 581 return (ip6_ctloutput(op, so, level, optname, mp)); 582 } 583 584 case IPPROTO_ICMPV6: 585 /* 586 * XXX: is it better to call icmp6_ctloutput() directly 587 * from protosw? 588 */ 589 return (icmp6_ctloutput(op, so, level, optname, mp)); 590 591 default: 592 if (op == PRCO_SETOPT && *mp) 593 m_free(*mp); 594 return EINVAL; 595 } 596 } 597 598 extern u_long rip6_sendspace; 599 extern u_long rip6_recvspace; 600 601 int 602 rip6_usrreq(so, req, m, nam, control, l) 603 struct socket *so; 604 int req; 605 struct mbuf *m, *nam, *control; 606 struct lwp *l; 607 { 608 struct in6pcb *in6p = sotoin6pcb(so); 609 struct proc *p; 610 int s; 611 int error = 0; 612 int priv; 613 614 priv = 0; 615 p = l ? l->l_proc : NULL; 616 if (p && !suser(p->p_ucred, &p->p_acflag)) 617 priv++; 618 619 if (req == PRU_CONTROL) 620 return (in6_control(so, (u_long)m, (caddr_t)nam, 621 (struct ifnet *)control, p)); 622 623 if (req == PRU_PURGEIF) { 624 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 625 in6_purgeif((struct ifnet *)control); 626 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 627 return (0); 628 } 629 630 switch (req) { 631 case PRU_ATTACH: 632 if (in6p) 633 panic("rip6_attach"); 634 if (!priv) { 635 error = EACCES; 636 break; 637 } 638 s = splsoftnet(); 639 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 640 splx(s); 641 break; 642 } 643 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) 644 { 645 splx(s); 646 break; 647 } 648 splx(s); 649 in6p = sotoin6pcb(so); 650 in6p->in6p_ip6.ip6_nxt = (long)nam; 651 in6p->in6p_cksum = -1; 652 653 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 654 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 655 if (in6p->in6p_icmp6filt == NULL) { 656 in6_pcbdetach(in6p); 657 error = ENOMEM; 658 break; 659 } 660 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 661 break; 662 663 case PRU_DISCONNECT: 664 if ((so->so_state & SS_ISCONNECTED) == 0) { 665 error = ENOTCONN; 666 break; 667 } 668 in6p->in6p_faddr = in6addr_any; 669 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 670 break; 671 672 case PRU_ABORT: 673 soisdisconnected(so); 674 /* Fallthrough */ 675 case PRU_DETACH: 676 if (in6p == 0) 677 panic("rip6_detach"); 678 if (so == ip6_mrouter) 679 ip6_mrouter_done(); 680 /* xxx: RSVP */ 681 if (in6p->in6p_icmp6filt) { 682 FREE(in6p->in6p_icmp6filt, M_PCB); 683 in6p->in6p_icmp6filt = NULL; 684 } 685 in6_pcbdetach(in6p); 686 break; 687 688 case PRU_BIND: 689 { 690 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 691 struct ifaddr *ia = NULL; 692 693 if (nam->m_len != sizeof(*addr)) { 694 error = EINVAL; 695 break; 696 } 697 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 698 error = EADDRNOTAVAIL; 699 break; 700 } 701 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 702 break; 703 704 /* 705 * we don't support mapped address here, it would confuse 706 * users so reject it 707 */ 708 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 709 error = EADDRNOTAVAIL; 710 break; 711 } 712 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 713 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 714 error = EADDRNOTAVAIL; 715 break; 716 } 717 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 718 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 719 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 720 error = EADDRNOTAVAIL; 721 break; 722 } 723 in6p->in6p_laddr = addr->sin6_addr; 724 break; 725 } 726 727 case PRU_CONNECT: 728 { 729 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 730 struct in6_addr *in6a = NULL; 731 struct ifnet *ifp = NULL; 732 int scope_ambiguous = 0; 733 734 if (nam->m_len != sizeof(*addr)) { 735 error = EINVAL; 736 break; 737 } 738 if (ifnet.tqh_first == 0) 739 { 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 Mon Sep 22 13:09:51 GMT 2025