raw_ip6.c revision 1.65
1 /* $NetBSD: raw_ip6.c,v 1.65 2004/06/11 04:10:10 itojun 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 1.65 2004/06/11 04:10:10 itojun Exp $"); 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/malloc.h> 71 #include <sys/mbuf.h> 72 #include <sys/socket.h> 73 #include <sys/protosw.h> 74 #include <sys/socketvar.h> 75 #include <sys/errno.h> 76 #include <sys/systm.h> 77 #include <sys/proc.h> 78 79 #include <net/if.h> 80 #include <net/route.h> 81 #include <net/if_types.h> 82 83 #include <netinet/in.h> 84 #include <netinet/in_var.h> 85 #include <netinet/ip6.h> 86 #include <netinet6/ip6_var.h> 87 #include <netinet6/ip6_mroute.h> 88 #include <netinet/icmp6.h> 89 #include <netinet6/in6_pcb.h> 90 #include <netinet6/nd6.h> 91 #include <netinet6/ip6protosw.h> 92 #ifdef ENABLE_DEFAULT_SCOPE 93 #include <netinet6/scope6_var.h> 94 #endif 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 /* KAME hack: recover scopeid */ 168 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 169 170 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 171 in6p = (struct in6pcb *)inph; 172 if (in6p->in6p_af != AF_INET6) 173 continue; 174 if (in6p->in6p_ip6.ip6_nxt && 175 in6p->in6p_ip6.ip6_nxt != proto) 176 continue; 177 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 178 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 181 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 182 continue; 183 if (in6p->in6p_cksum != -1) { 184 rip6stat.rip6s_isum++; 185 if (in6_cksum(m, proto, *offp, 186 m->m_pkthdr.len - *offp)) { 187 rip6stat.rip6s_badsum++; 188 continue; 189 } 190 } 191 if (last) { 192 struct mbuf *n; 193 194 #ifdef IPSEC 195 /* 196 * Check AH/ESP integrity. 197 */ 198 if (ipsec6_in_reject(m, last)) { 199 ipsec6stat.in_polvio++; 200 /* do not inject data into pcb */ 201 } else 202 #endif /* IPSEC */ 203 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 204 if (last->in6p_flags & IN6P_CONTROLOPTS) 205 ip6_savecontrol(last, &opts, ip6, n); 206 /* strip intermediate headers */ 207 m_adj(n, *offp); 208 if (sbappendaddr(&last->in6p_socket->so_rcv, 209 (struct sockaddr *)&rip6src, n, opts) == 0) { 210 /* should notify about lost packet */ 211 m_freem(n); 212 if (opts) 213 m_freem(opts); 214 rip6stat.rip6s_fullsock++; 215 } else 216 sorwakeup(last->in6p_socket); 217 opts = NULL; 218 } 219 } 220 last = in6p; 221 } 222 #ifdef IPSEC 223 /* 224 * Check AH/ESP integrity. 225 */ 226 if (last && ipsec6_in_reject(m, last)) { 227 m_freem(m); 228 ipsec6stat.in_polvio++; 229 ip6stat.ip6s_delivered--; 230 /* do not inject data into pcb */ 231 } else 232 #endif /* IPSEC */ 233 if (last) { 234 if (last->in6p_flags & IN6P_CONTROLOPTS) 235 ip6_savecontrol(last, &opts, ip6, m); 236 /* strip intermediate headers */ 237 m_adj(m, *offp); 238 if (sbappendaddr(&last->in6p_socket->so_rcv, 239 (struct sockaddr *)&rip6src, m, opts) == 0) { 240 m_freem(m); 241 if (opts) 242 m_freem(opts); 243 rip6stat.rip6s_fullsock++; 244 } else 245 sorwakeup(last->in6p_socket); 246 } else { 247 rip6stat.rip6s_nosock++; 248 if (m->m_flags & M_MCAST) 249 rip6stat.rip6s_nosockmcast++; 250 if (proto == IPPROTO_NONE) 251 m_freem(m); 252 else { 253 u_int8_t *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 254 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 255 icmp6_error(m, ICMP6_PARAM_PROB, 256 ICMP6_PARAMPROB_NEXTHEADER, 257 prvnxtp - mtod(m, u_int8_t *)); 258 } 259 ip6stat.ip6s_delivered--; 260 } 261 return IPPROTO_DONE; 262 } 263 264 void 265 rip6_ctlinput(cmd, sa, d) 266 int cmd; 267 struct sockaddr *sa; 268 void *d; 269 { 270 struct ip6_hdr *ip6; 271 struct ip6ctlparam *ip6cp = NULL; 272 const struct sockaddr_in6 *sa6_src = NULL; 273 void *cmdarg; 274 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 275 int nxt; 276 277 if (sa->sa_family != AF_INET6 || 278 sa->sa_len != sizeof(struct sockaddr_in6)) 279 return; 280 281 if ((unsigned)cmd >= PRC_NCMDS) 282 return; 283 if (PRC_IS_REDIRECT(cmd)) 284 notify = in6_rtchange, d = NULL; 285 else if (cmd == PRC_HOSTDEAD) 286 d = NULL; 287 else if (cmd == PRC_MSGSIZE) 288 ; /* special code is present, see below */ 289 else if (inet6ctlerrmap[cmd] == 0) 290 return; 291 292 /* if the parameter is from icmp6, decode it. */ 293 if (d != NULL) { 294 ip6cp = (struct ip6ctlparam *)d; 295 ip6 = ip6cp->ip6c_ip6; 296 cmdarg = ip6cp->ip6c_cmdarg; 297 sa6_src = ip6cp->ip6c_src; 298 nxt = ip6cp->ip6c_nxt; 299 } else { 300 ip6 = NULL; 301 cmdarg = NULL; 302 sa6_src = &sa6_any; 303 nxt = -1; 304 } 305 306 if (ip6 && cmd == PRC_MSGSIZE) { 307 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 308 int valid = 0; 309 struct in6pcb *in6p; 310 311 /* 312 * Check to see if we have a valid raw IPv6 socket 313 * corresponding to the address in the ICMPv6 message 314 * payload, and the protocol (ip6_nxt) meets the socket. 315 * XXX chase extension headers, or pass final nxt value 316 * from icmp6_notify_error() 317 */ 318 in6p = NULL; 319 in6p = in6_pcblookup_connect(&raw6cbtable, &sa6->sin6_addr, 0, 320 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 321 #if 0 322 if (!in6p) { 323 /* 324 * As the use of sendto(2) is fairly popular, 325 * we may want to allow non-connected pcb too. 326 * But it could be too weak against attacks... 327 * We should at least check if the local 328 * address (= s) is really ours. 329 */ 330 in6p = in6_pcblookup_bind(&raw6cbtable, 331 &sa6->sin6_addr, 0, 0)) 332 } 333 #endif 334 335 if (in6p && in6p->in6p_ip6.ip6_nxt && 336 in6p->in6p_ip6.ip6_nxt == nxt) 337 valid++; 338 339 /* 340 * Depending on the value of "valid" and routing table 341 * size (mtudisc_{hi,lo}wat), we will: 342 * - recalculate the new MTU and create the 343 * corresponding routing entry, or 344 * - ignore the MTU change notification. 345 */ 346 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 347 348 /* 349 * regardless of if we called icmp6_mtudisc_update(), 350 * we need to call in6_pcbnotify(), to notify path 351 * MTU change to the userland (2292bis-02), because 352 * some unconnected sockets may share the same 353 * destination and want to know the path MTU. 354 */ 355 } 356 357 (void) in6_pcbnotify(&raw6cbtable, sa, 0, 358 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 359 } 360 361 /* 362 * Generate IPv6 header and pass packet to ip6_output. 363 * Tack on options user may have setup with control call. 364 */ 365 int 366 #if __STDC__ 367 rip6_output(struct mbuf *m, ...) 368 #else 369 rip6_output(m, va_alist) 370 struct mbuf *m; 371 va_dcl 372 #endif 373 { 374 struct socket *so; 375 struct sockaddr_in6 *dstsock; 376 struct mbuf *control; 377 struct in6_addr *dst; 378 struct ip6_hdr *ip6; 379 struct in6pcb *in6p; 380 u_int plen = m->m_pkthdr.len; 381 int error = 0; 382 struct ip6_pktopts opt, *optp = NULL, *origoptp; 383 struct ifnet *oifp = NULL; 384 int type, code; /* for ICMPv6 output statistics only */ 385 int priv = 0; 386 va_list ap; 387 int flags; 388 389 va_start(ap, m); 390 so = va_arg(ap, struct socket *); 391 dstsock = va_arg(ap, struct sockaddr_in6 *); 392 control = va_arg(ap, struct mbuf *); 393 va_end(ap); 394 395 in6p = sotoin6pcb(so); 396 397 priv = 0; 398 { 399 struct proc *p = curproc; /* XXX */ 400 401 if (p && !suser(p->p_ucred, &p->p_acflag)) 402 priv = 1; 403 } 404 dst = &dstsock->sin6_addr; 405 if (control) { 406 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 407 goto bad; 408 optp = &opt; 409 } else 410 optp = in6p->in6p_outputopts; 411 412 /* 413 * For an ICMPv6 packet, we should know its type and code 414 * to update statistics. 415 */ 416 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 417 struct icmp6_hdr *icmp6; 418 if (m->m_len < sizeof(struct icmp6_hdr) && 419 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 420 error = ENOBUFS; 421 goto bad; 422 } 423 icmp6 = mtod(m, struct icmp6_hdr *); 424 type = icmp6->icmp6_type; 425 code = icmp6->icmp6_code; 426 } else { 427 type = 0; 428 code = 0; 429 } 430 431 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 432 if (!m) { 433 error = ENOBUFS; 434 goto bad; 435 } 436 ip6 = mtod(m, struct ip6_hdr *); 437 438 /* 439 * Next header might not be ICMP6 but use its pseudo header anyway. 440 */ 441 ip6->ip6_dst = *dst; 442 443 /* KAME hack: embed scopeid */ 444 origoptp = in6p->in6p_outputopts; 445 in6p->in6p_outputopts = optp; 446 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 447 error = EINVAL; 448 goto bad; 449 } 450 in6p->in6p_outputopts = origoptp; 451 452 /* 453 * Source address selection. 454 */ 455 { 456 struct in6_addr *in6a; 457 458 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 459 &in6p->in6p_route, &in6p->in6p_laddr, &error)) == 0) { 460 if (error == 0) 461 error = EADDRNOTAVAIL; 462 goto bad; 463 } 464 ip6->ip6_src = *in6a; 465 if (in6p->in6p_route.ro_rt) { 466 /* what if oifp contradicts ? */ 467 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 468 } 469 } 470 471 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 472 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 473 ip6->ip6_vfc |= IPV6_VERSION; 474 #if 0 /* ip6_plen will be filled in ip6_output. */ 475 ip6->ip6_plen = htons((u_int16_t)plen); 476 #endif 477 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 478 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 479 480 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 481 in6p->in6p_cksum != -1) { 482 int off; 483 u_int16_t sum; 484 485 /* compute checksum */ 486 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 487 off = offsetof(struct icmp6_hdr, icmp6_cksum); 488 else 489 off = in6p->in6p_cksum; 490 if (plen < off + 1) { 491 error = EINVAL; 492 goto bad; 493 } 494 off += sizeof(struct ip6_hdr); 495 496 sum = 0; 497 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 498 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 499 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 500 } 501 502 flags = 0; 503 if (in6p->in6p_flags & IN6P_MINMTU) 504 flags |= IPV6_MINMTU; 505 506 error = ip6_output(m, optp, &in6p->in6p_route, flags, 507 in6p->in6p_moptions, so, &oifp); 508 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 509 if (oifp) 510 icmp6_ifoutstat_inc(oifp, type, code); 511 icmp6stat.icp6s_outhist[type]++; 512 } else 513 rip6stat.rip6s_opackets++; 514 515 goto freectl; 516 517 bad: 518 if (m) 519 m_freem(m); 520 521 freectl: 522 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 523 RTFREE(optp->ip6po_route.ro_rt); 524 if (control) 525 m_freem(control); 526 return (error); 527 } 528 529 /* 530 * Raw IPv6 socket option processing. 531 */ 532 int 533 rip6_ctloutput(op, so, level, optname, mp) 534 int op; 535 struct socket *so; 536 int level, optname; 537 struct mbuf **mp; 538 { 539 int error = 0; 540 541 switch (level) { 542 case IPPROTO_IPV6: 543 switch (optname) { 544 case MRT6_INIT: 545 case MRT6_DONE: 546 case MRT6_ADD_MIF: 547 case MRT6_DEL_MIF: 548 case MRT6_ADD_MFC: 549 case MRT6_DEL_MFC: 550 case MRT6_PIM: 551 if (op == PRCO_SETOPT) { 552 error = ip6_mrouter_set(optname, so, *mp); 553 if (*mp) 554 (void)m_free(*mp); 555 } else if (op == PRCO_GETOPT) 556 error = ip6_mrouter_get(optname, so, mp); 557 else 558 error = EINVAL; 559 return (error); 560 case IPV6_CHECKSUM: 561 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 562 default: 563 return (ip6_ctloutput(op, so, level, optname, mp)); 564 } 565 566 case IPPROTO_ICMPV6: 567 /* 568 * XXX: is it better to call icmp6_ctloutput() directly 569 * from protosw? 570 */ 571 return (icmp6_ctloutput(op, so, level, optname, mp)); 572 573 default: 574 if (op == PRCO_SETOPT && *mp) 575 m_free(*mp); 576 return EINVAL; 577 } 578 } 579 580 extern u_long rip6_sendspace; 581 extern u_long rip6_recvspace; 582 583 int 584 rip6_usrreq(so, req, m, nam, control, p) 585 struct socket *so; 586 int req; 587 struct mbuf *m, *nam, *control; 588 struct proc *p; 589 { 590 struct in6pcb *in6p = sotoin6pcb(so); 591 int s; 592 int error = 0; 593 int priv; 594 595 priv = 0; 596 if (p && !suser(p->p_ucred, &p->p_acflag)) 597 priv++; 598 599 if (req == PRU_CONTROL) 600 return (in6_control(so, (u_long)m, (caddr_t)nam, 601 (struct ifnet *)control, p)); 602 603 if (req == PRU_PURGEIF) { 604 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 605 in6_purgeif((struct ifnet *)control); 606 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 607 return (0); 608 } 609 610 switch (req) { 611 case PRU_ATTACH: 612 if (in6p) 613 panic("rip6_attach"); 614 if (!priv) { 615 error = EACCES; 616 break; 617 } 618 s = splsoftnet(); 619 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 620 splx(s); 621 break; 622 } 623 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) 624 { 625 splx(s); 626 break; 627 } 628 splx(s); 629 in6p = sotoin6pcb(so); 630 in6p->in6p_ip6.ip6_nxt = (long)nam; 631 in6p->in6p_cksum = -1; 632 633 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 634 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 635 if (in6p->in6p_icmp6filt == NULL) { 636 in6_pcbdetach(in6p); 637 error = ENOMEM; 638 break; 639 } 640 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 641 break; 642 643 case PRU_DISCONNECT: 644 if ((so->so_state & SS_ISCONNECTED) == 0) { 645 error = ENOTCONN; 646 break; 647 } 648 in6p->in6p_faddr = in6addr_any; 649 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 650 break; 651 652 case PRU_ABORT: 653 soisdisconnected(so); 654 /* Fallthrough */ 655 case PRU_DETACH: 656 if (in6p == 0) 657 panic("rip6_detach"); 658 if (so == ip6_mrouter) 659 ip6_mrouter_done(); 660 /* xxx: RSVP */ 661 if (in6p->in6p_icmp6filt) { 662 FREE(in6p->in6p_icmp6filt, M_PCB); 663 in6p->in6p_icmp6filt = NULL; 664 } 665 in6_pcbdetach(in6p); 666 break; 667 668 case PRU_BIND: 669 { 670 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 671 struct ifaddr *ia = NULL; 672 673 if (nam->m_len != sizeof(*addr)) { 674 error = EINVAL; 675 break; 676 } 677 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 678 error = EADDRNOTAVAIL; 679 break; 680 } 681 #ifdef ENABLE_DEFAULT_SCOPE 682 if (addr->sin6_scope_id == 0) /* not change if specified */ 683 addr->sin6_scope_id = 684 scope6_addr2default(&addr->sin6_addr); 685 #endif 686 /* KAME hack: embed scopeid */ 687 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 688 return EINVAL; 689 #ifndef SCOPEDROUTING 690 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 691 #endif 692 693 /* 694 * we don't support mapped address here, it would confuse 695 * users so reject it 696 */ 697 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 698 error = EADDRNOTAVAIL; 699 break; 700 } 701 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 702 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 703 error = EADDRNOTAVAIL; 704 break; 705 } 706 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 707 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 708 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 709 error = EADDRNOTAVAIL; 710 break; 711 } 712 in6p->in6p_laddr = addr->sin6_addr; 713 break; 714 } 715 716 case PRU_CONNECT: 717 { 718 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 719 struct in6_addr *in6a = NULL; 720 #ifdef ENABLE_DEFAULT_SCOPE 721 struct sockaddr_in6 sin6; 722 #endif 723 724 if (nam->m_len != sizeof(*addr)) { 725 error = EINVAL; 726 break; 727 } 728 if (ifnet.tqh_first == 0) 729 { 730 error = EADDRNOTAVAIL; 731 break; 732 } 733 if (addr->sin6_family != AF_INET6) { 734 error = EAFNOSUPPORT; 735 break; 736 } 737 738 #ifdef ENABLE_DEFAULT_SCOPE 739 if (addr->sin6_scope_id == 0) { 740 /* protect *addr */ 741 sin6 = *addr; 742 addr = &sin6; 743 addr->sin6_scope_id = 744 scope6_addr2default(&addr->sin6_addr); 745 } 746 #endif 747 748 /* Source address selection. XXX: need pcblookup? */ 749 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 750 in6p->in6p_moptions, &in6p->in6p_route, 751 &in6p->in6p_laddr, &error); 752 if (in6a == NULL) { 753 if (error == 0) 754 error = EADDRNOTAVAIL; 755 break; 756 } 757 in6p->in6p_laddr = *in6a; 758 in6p->in6p_faddr = addr->sin6_addr; 759 soisconnected(so); 760 break; 761 } 762 763 case PRU_CONNECT2: 764 error = EOPNOTSUPP; 765 break; 766 767 /* 768 * Mark the connection as being incapable of futther input. 769 */ 770 case PRU_SHUTDOWN: 771 socantsendmore(so); 772 break; 773 /* 774 * Ship a packet out. The appropriate raw output 775 * routine handles any messaging necessary. 776 */ 777 case PRU_SEND: 778 { 779 struct sockaddr_in6 tmp; 780 struct sockaddr_in6 *dst; 781 782 /* always copy sockaddr to avoid overwrites */ 783 if (so->so_state & SS_ISCONNECTED) { 784 if (nam) { 785 error = EISCONN; 786 break; 787 } 788 /* XXX */ 789 bzero(&tmp, sizeof(tmp)); 790 tmp.sin6_family = AF_INET6; 791 tmp.sin6_len = sizeof(struct sockaddr_in6); 792 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 793 sizeof(struct in6_addr)); 794 dst = &tmp; 795 } else { 796 if (nam == NULL) { 797 error = ENOTCONN; 798 break; 799 } 800 if (nam->m_len != sizeof(tmp)) { 801 error = EINVAL; 802 break; 803 } 804 805 tmp = *mtod(nam, struct sockaddr_in6 *); 806 dst = &tmp; 807 808 if (dst->sin6_family != AF_INET6) { 809 error = EAFNOSUPPORT; 810 break; 811 } 812 } 813 #ifdef ENABLE_DEFAULT_SCOPE 814 if (dst->sin6_scope_id == 0) { 815 dst->sin6_scope_id = 816 scope6_addr2default(&dst->sin6_addr); 817 } 818 #endif 819 error = rip6_output(m, so, dst, control); 820 m = NULL; 821 break; 822 } 823 824 case PRU_SENSE: 825 /* 826 * stat: don't bother with a blocksize 827 */ 828 return (0); 829 /* 830 * Not supported. 831 */ 832 case PRU_RCVOOB: 833 case PRU_RCVD: 834 case PRU_LISTEN: 835 case PRU_ACCEPT: 836 case PRU_SENDOOB: 837 error = EOPNOTSUPP; 838 break; 839 840 case PRU_SOCKADDR: 841 in6_setsockaddr(in6p, nam); 842 break; 843 844 case PRU_PEERADDR: 845 in6_setpeeraddr(in6p, nam); 846 break; 847 848 default: 849 panic("rip6_usrreq"); 850 } 851 if (m != NULL) 852 m_freem(m); 853 return (error); 854 } 855
Indexes created Tue Sep 30 20:09:53 GMT 2025