raw_ip6.c revision 1.77
1 /* $NetBSD: raw_ip6.c,v 1.77 2006/05/14 21:19:34 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 1.77 2006/05/14 21:19:34 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 (curproc && !kauth_authorize_generic(curproc->p_cred, 404 KAUTH_GENERIC_ISSUSER, 405 &curproc->p_acflag)) 406 priv = 1; 407 408 dst = &dstsock->sin6_addr; 409 if (control) { 410 if ((error = ip6_setpktopts(control, &opt, 411 in6p->in6p_outputopts, 412 priv, so->so_proto->pr_protocol)) != 0) { 413 goto bad; 414 } 415 optp = &opt; 416 } else 417 optp = in6p->in6p_outputopts; 418 419 /* 420 * Check and convert scope zone ID into internal form. 421 * XXX: we may still need to determine the zone later. 422 */ 423 if (!(so->so_state & SS_ISCONNECTED)) { 424 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 425 scope_ambiguous = 1; 426 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 427 goto bad; 428 } 429 430 /* 431 * For an ICMPv6 packet, we should know its type and code 432 * to update statistics. 433 */ 434 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 435 struct icmp6_hdr *icmp6; 436 if (m->m_len < sizeof(struct icmp6_hdr) && 437 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 438 error = ENOBUFS; 439 goto bad; 440 } 441 icmp6 = mtod(m, struct icmp6_hdr *); 442 type = icmp6->icmp6_type; 443 code = icmp6->icmp6_code; 444 } else { 445 type = 0; 446 code = 0; 447 } 448 449 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 450 if (!m) { 451 error = ENOBUFS; 452 goto bad; 453 } 454 ip6 = mtod(m, struct ip6_hdr *); 455 456 /* 457 * Next header might not be ICMP6 but use its pseudo header anyway. 458 */ 459 ip6->ip6_dst = *dst; 460 461 /* 462 * Source address selection. 463 */ 464 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 465 &in6p->in6p_route, &in6p->in6p_laddr, &oifp, &error)) == 0) { 466 if (error == 0) 467 error = EADDRNOTAVAIL; 468 goto bad; 469 } 470 ip6->ip6_src = *in6a; 471 472 if (oifp && scope_ambiguous) { 473 /* 474 * Application should provide a proper zone ID or the use of 475 * default zone IDs should be enabled. Unfortunately, some 476 * applications do not behave as it should, so we need a 477 * workaround. Even if an appropriate ID is not determined 478 * (when it's required), if we can determine the outgoing 479 * interface. determine the zone ID based on the interface. 480 */ 481 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 482 if (error != 0) 483 goto bad; 484 } 485 ip6->ip6_dst = dstsock->sin6_addr; 486 487 /* fill in the rest of the IPv6 header fields */ 488 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 489 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 490 ip6->ip6_vfc |= IPV6_VERSION; 491 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 492 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 493 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 494 495 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 496 in6p->in6p_cksum != -1) { 497 int off; 498 u_int16_t sum; 499 500 /* compute checksum */ 501 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 502 off = offsetof(struct icmp6_hdr, icmp6_cksum); 503 else 504 off = in6p->in6p_cksum; 505 if (plen < off + 1) { 506 error = EINVAL; 507 goto bad; 508 } 509 off += sizeof(struct ip6_hdr); 510 511 sum = 0; 512 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 513 M_DONTWAIT); 514 if (m == NULL) { 515 error = ENOBUFS; 516 goto bad; 517 } 518 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 519 m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum, 520 M_DONTWAIT); 521 if (m == NULL) { 522 error = ENOBUFS; 523 goto bad; 524 } 525 } 526 527 error = ip6_output(m, optp, &in6p->in6p_route, 0, 528 in6p->in6p_moptions, so, &oifp); 529 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 530 if (oifp) 531 icmp6_ifoutstat_inc(oifp, type, code); 532 icmp6stat.icp6s_outhist[type]++; 533 } else 534 rip6stat.rip6s_opackets++; 535 536 goto freectl; 537 538 bad: 539 if (m) 540 m_freem(m); 541 542 freectl: 543 if (control) { 544 ip6_clearpktopts(&opt, -1); 545 m_freem(control); 546 } 547 return (error); 548 } 549 550 /* 551 * Raw IPv6 socket option processing. 552 */ 553 int 554 rip6_ctloutput(op, so, level, optname, mp) 555 int op; 556 struct socket *so; 557 int level, optname; 558 struct mbuf **mp; 559 { 560 int error = 0; 561 562 switch (level) { 563 case IPPROTO_IPV6: 564 switch (optname) { 565 case MRT6_INIT: 566 case MRT6_DONE: 567 case MRT6_ADD_MIF: 568 case MRT6_DEL_MIF: 569 case MRT6_ADD_MFC: 570 case MRT6_DEL_MFC: 571 case MRT6_PIM: 572 if (op == PRCO_SETOPT) { 573 error = ip6_mrouter_set(optname, so, *mp); 574 if (*mp) 575 (void)m_free(*mp); 576 } else if (op == PRCO_GETOPT) 577 error = ip6_mrouter_get(optname, so, mp); 578 else 579 error = EINVAL; 580 return (error); 581 case IPV6_CHECKSUM: 582 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 583 default: 584 return (ip6_ctloutput(op, so, level, optname, mp)); 585 } 586 587 case IPPROTO_ICMPV6: 588 /* 589 * XXX: is it better to call icmp6_ctloutput() directly 590 * from protosw? 591 */ 592 return (icmp6_ctloutput(op, so, level, optname, mp)); 593 594 default: 595 if (op == PRCO_SETOPT && *mp) 596 m_free(*mp); 597 return EINVAL; 598 } 599 } 600 601 extern u_long rip6_sendspace; 602 extern u_long rip6_recvspace; 603 604 int 605 rip6_usrreq(so, req, m, nam, control, l) 606 struct socket *so; 607 int req; 608 struct mbuf *m, *nam, *control; 609 struct lwp *l; 610 { 611 struct in6pcb *in6p = sotoin6pcb(so); 612 struct proc *p; 613 int s; 614 int error = 0; 615 int priv; 616 617 priv = 0; 618 p = l ? l->l_proc : NULL; 619 if (p && !kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) 620 priv++; 621 622 if (req == PRU_CONTROL) 623 return (in6_control(so, (u_long)m, (caddr_t)nam, 624 (struct ifnet *)control, p)); 625 626 if (req == PRU_PURGEIF) { 627 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 628 in6_purgeif((struct ifnet *)control); 629 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 630 return (0); 631 } 632 633 switch (req) { 634 case PRU_ATTACH: 635 if (in6p) 636 panic("rip6_attach"); 637 if (!priv) { 638 error = EACCES; 639 break; 640 } 641 s = splsoftnet(); 642 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 643 splx(s); 644 break; 645 } 646 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) 647 { 648 splx(s); 649 break; 650 } 651 splx(s); 652 in6p = sotoin6pcb(so); 653 in6p->in6p_ip6.ip6_nxt = (long)nam; 654 in6p->in6p_cksum = -1; 655 656 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 657 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 658 if (in6p->in6p_icmp6filt == NULL) { 659 in6_pcbdetach(in6p); 660 error = ENOMEM; 661 break; 662 } 663 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 664 break; 665 666 case PRU_DISCONNECT: 667 if ((so->so_state & SS_ISCONNECTED) == 0) { 668 error = ENOTCONN; 669 break; 670 } 671 in6p->in6p_faddr = in6addr_any; 672 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 673 break; 674 675 case PRU_ABORT: 676 soisdisconnected(so); 677 /* Fallthrough */ 678 case PRU_DETACH: 679 if (in6p == 0) 680 panic("rip6_detach"); 681 if (so == ip6_mrouter) 682 ip6_mrouter_done(); 683 /* xxx: RSVP */ 684 if (in6p->in6p_icmp6filt) { 685 FREE(in6p->in6p_icmp6filt, M_PCB); 686 in6p->in6p_icmp6filt = NULL; 687 } 688 in6_pcbdetach(in6p); 689 break; 690 691 case PRU_BIND: 692 { 693 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 694 struct ifaddr *ia = NULL; 695 696 if (nam->m_len != sizeof(*addr)) { 697 error = EINVAL; 698 break; 699 } 700 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 701 error = EADDRNOTAVAIL; 702 break; 703 } 704 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 705 break; 706 707 /* 708 * we don't support mapped address here, it would confuse 709 * users so reject it 710 */ 711 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 712 error = EADDRNOTAVAIL; 713 break; 714 } 715 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 716 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 717 error = EADDRNOTAVAIL; 718 break; 719 } 720 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 721 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 722 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 723 error = EADDRNOTAVAIL; 724 break; 725 } 726 in6p->in6p_laddr = addr->sin6_addr; 727 break; 728 } 729 730 case PRU_CONNECT: 731 { 732 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 733 struct in6_addr *in6a = NULL; 734 struct ifnet *ifp = NULL; 735 int scope_ambiguous = 0; 736 737 if (nam->m_len != sizeof(*addr)) { 738 error = EINVAL; 739 break; 740 } 741 if (ifnet.tqh_first == 0) 742 { 743 error = EADDRNOTAVAIL; 744 break; 745 } 746 if (addr->sin6_family != AF_INET6) { 747 error = EAFNOSUPPORT; 748 break; 749 } 750 751 /* 752 * Application should provide a proper zone ID or the use of 753 * default zone IDs should be enabled. Unfortunately, some 754 * applications do not behave as it should, so we need a 755 * workaround. Even if an appropriate ID is not determined, 756 * we'll see if we can determine the outgoing interface. If we 757 * can, determine the zone ID based on the interface below. 758 */ 759 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 760 scope_ambiguous = 1; 761 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 762 return(error); 763 764 /* Source address selection. XXX: need pcblookup? */ 765 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 766 in6p->in6p_moptions, &in6p->in6p_route, 767 &in6p->in6p_laddr, &ifp, &error); 768 if (in6a == NULL) { 769 if (error == 0) 770 error = EADDRNOTAVAIL; 771 break; 772 } 773 /* XXX: see above */ 774 if (ifp && scope_ambiguous && 775 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 776 break; 777 } 778 in6p->in6p_laddr = *in6a; 779 in6p->in6p_faddr = addr->sin6_addr; 780 soisconnected(so); 781 break; 782 } 783 784 case PRU_CONNECT2: 785 error = EOPNOTSUPP; 786 break; 787 788 /* 789 * Mark the connection as being incapable of futther input. 790 */ 791 case PRU_SHUTDOWN: 792 socantsendmore(so); 793 break; 794 /* 795 * Ship a packet out. The appropriate raw output 796 * routine handles any messaging necessary. 797 */ 798 case PRU_SEND: 799 { 800 struct sockaddr_in6 tmp; 801 struct sockaddr_in6 *dst; 802 803 /* always copy sockaddr to avoid overwrites */ 804 if (so->so_state & SS_ISCONNECTED) { 805 if (nam) { 806 error = EISCONN; 807 break; 808 } 809 /* XXX */ 810 bzero(&tmp, sizeof(tmp)); 811 tmp.sin6_family = AF_INET6; 812 tmp.sin6_len = sizeof(struct sockaddr_in6); 813 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 814 sizeof(struct in6_addr)); 815 dst = &tmp; 816 } else { 817 if (nam == NULL) { 818 error = ENOTCONN; 819 break; 820 } 821 if (nam->m_len != sizeof(tmp)) { 822 error = EINVAL; 823 break; 824 } 825 826 tmp = *mtod(nam, struct sockaddr_in6 *); 827 dst = &tmp; 828 829 if (dst->sin6_family != AF_INET6) { 830 error = EAFNOSUPPORT; 831 break; 832 } 833 } 834 error = rip6_output(m, so, dst, control); 835 m = NULL; 836 break; 837 } 838 839 case PRU_SENSE: 840 /* 841 * stat: don't bother with a blocksize 842 */ 843 return (0); 844 /* 845 * Not supported. 846 */ 847 case PRU_RCVOOB: 848 case PRU_RCVD: 849 case PRU_LISTEN: 850 case PRU_ACCEPT: 851 case PRU_SENDOOB: 852 error = EOPNOTSUPP; 853 break; 854 855 case PRU_SOCKADDR: 856 in6_setsockaddr(in6p, nam); 857 break; 858 859 case PRU_PEERADDR: 860 in6_setpeeraddr(in6p, nam); 861 break; 862 863 default: 864 panic("rip6_usrreq"); 865 } 866 if (m != NULL) 867 m_freem(m); 868 return (error); 869 } 870 871 SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup") 872 { 873 874 sysctl_createv(clog, 0, NULL, NULL, 875 CTLFLAG_PERMANENT, 876 CTLTYPE_NODE, "net", NULL, 877 NULL, 0, NULL, 0, 878 CTL_NET, CTL_EOL); 879 sysctl_createv(clog, 0, NULL, NULL, 880 CTLFLAG_PERMANENT, 881 CTLTYPE_NODE, "inet6", NULL, 882 NULL, 0, NULL, 0, 883 CTL_NET, PF_INET6, CTL_EOL); 884 sysctl_createv(clog, 0, NULL, NULL, 885 CTLFLAG_PERMANENT, 886 CTLTYPE_NODE, "raw6", 887 SYSCTL_DESCR("Raw IPv6 settings"), 888 NULL, 0, NULL, 0, 889 CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL); 890 891 sysctl_createv(clog, 0, NULL, NULL, 892 CTLFLAG_PERMANENT, 893 CTLTYPE_STRUCT, "pcblist", 894 SYSCTL_DESCR("Raw IPv6 control block list"), 895 sysctl_inpcblist, 0, &raw6cbtable, 0, 896 CTL_NET, PF_INET6, IPPROTO_RAW, 897 CTL_CREATE, CTL_EOL); 898 sysctl_createv(clog, 0, NULL, NULL, 899 CTLFLAG_PERMANENT, 900 CTLTYPE_STRUCT, "stats", 901 SYSCTL_DESCR("Raw IPv6 statistics"), 902 NULL, 0, &rip6stat, sizeof(rip6stat), 903 CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS, 904 CTL_EOL); 905 } 906
Indexes created Mon Sep 22 13:09:51 GMT 2025