1 /* $NetBSD: raw_ip6.c,v 1.51 2002/09/11 02:46:47 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.51 2002/09/11 02:46:47 itojun Exp $"); 70 71 #include "opt_ipsec.h" 72 73 #include <sys/param.h> 74 #include <sys/malloc.h> 75 #include <sys/mbuf.h> 76 #include <sys/socket.h> 77 #include <sys/protosw.h> 78 #include <sys/socketvar.h> 79 #include <sys/errno.h> 80 #include <sys/systm.h> 81 #include <sys/proc.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 #include <net/if_types.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/nd6.h> 95 #include <netinet6/ip6protosw.h> 96 #ifdef ENABLE_DEFAULT_SCOPE 97 #include <netinet6/scope6_var.h> 98 #endif 99 #include <netinet6/raw_ip6.h> 100 101 #ifdef IPSEC 102 #include <netinet6/ipsec.h> 103 #endif /* IPSEC */ 104 105 #include <machine/stdarg.h> 106 107 #include "faith.h" 108 #if defined(NFAITH) && 0 < NFAITH 109 #include <net/if_faith.h> 110 #endif 111 112 struct in6pcb rawin6pcb; 113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 114 115 /* 116 * Raw interface to IP6 protocol. 117 */ 118 119 struct rip6stat rip6stat; 120 121 /* 122 * Initialize raw connection block queue. 123 */ 124 void 125 rip6_init() 126 { 127 128 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 129 } 130 131 /* 132 * Setup generic address and protocol structures 133 * for raw_input routine, then pass them along with 134 * mbuf chain. 135 */ 136 int 137 rip6_input(mp, offp, proto) 138 struct mbuf **mp; 139 int *offp, proto; 140 { 141 struct mbuf *m = *mp; 142 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 143 struct in6pcb *in6p; 144 struct in6pcb *last = NULL; 145 struct sockaddr_in6 rip6src; 146 struct mbuf *opts = NULL; 147 148 rip6stat.rip6s_ipackets++; 149 150 #if defined(NFAITH) && 0 < NFAITH 151 if (faithprefix(&ip6->ip6_dst)) { 152 /* send icmp6 host unreach? */ 153 m_freem(m); 154 return IPPROTO_DONE; 155 } 156 #endif 157 158 /* Be proactive about malicious use of IPv4 mapped address */ 159 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 160 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 161 /* XXX stat */ 162 m_freem(m); 163 return IPPROTO_DONE; 164 } 165 166 bzero(&rip6src, sizeof(rip6src)); 167 rip6src.sin6_len = sizeof(struct sockaddr_in6); 168 rip6src.sin6_family = AF_INET6; 169 #if 0 /* XXX inbound flowlabel */ 170 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 171 #endif 172 /* KAME hack: recover scopeid */ 173 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 174 175 for (in6p = rawin6pcb.in6p_next; 176 in6p != &rawin6pcb; in6p = in6p->in6p_next) 177 { 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, ip6->ip6_nxt, *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 mbuf *m; 276 int off; 277 struct ip6ctlparam *ip6cp = NULL; 278 const struct sockaddr_in6 *sa6_src = NULL; 279 void *cmdarg; 280 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 281 int nxt; 282 283 if (sa->sa_family != AF_INET6 || 284 sa->sa_len != sizeof(struct sockaddr_in6)) 285 return; 286 287 if ((unsigned)cmd >= PRC_NCMDS) 288 return; 289 if (PRC_IS_REDIRECT(cmd)) 290 notify = in6_rtchange, d = NULL; 291 else if (cmd == PRC_HOSTDEAD) 292 d = NULL; 293 else if (cmd == PRC_MSGSIZE) 294 ; /* special code is present, see below */ 295 else if (inet6ctlerrmap[cmd] == 0) 296 return; 297 298 /* if the parameter is from icmp6, decode it. */ 299 if (d != NULL) { 300 ip6cp = (struct ip6ctlparam *)d; 301 m = ip6cp->ip6c_m; 302 ip6 = ip6cp->ip6c_ip6; 303 off = ip6cp->ip6c_off; 304 cmdarg = ip6cp->ip6c_cmdarg; 305 sa6_src = ip6cp->ip6c_src; 306 nxt = ip6cp->ip6c_nxt; 307 } else { 308 m = NULL; 309 ip6 = NULL; 310 cmdarg = NULL; 311 sa6_src = &sa6_any; 312 nxt = -1; 313 } 314 315 if (ip6 && cmd == PRC_MSGSIZE) { 316 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 317 int valid = 0; 318 struct in6pcb *in6p; 319 320 /* 321 * Check to see if we have a valid raw IPv6 socket 322 * corresponding to the address in the ICMPv6 message 323 * payload, and the protocol (ip6_nxt) meets the socket. 324 * XXX chase extension headers, or pass final nxt value 325 * from icmp6_notify_error() 326 */ 327 in6p = NULL; 328 in6p = in6_pcblookup_connect(&rawin6pcb, &sa6->sin6_addr, 0, 329 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 330 #if 0 331 if (!in6p) { 332 /* 333 * As the use of sendto(2) is fairly popular, 334 * we may want to allow non-connected pcb too. 335 * But it could be too weak against attacks... 336 * We should at least check if the local 337 * address (= s) is really ours. 338 */ 339 in6p = in6_pcblookup_bind(&rawin6pcb, 340 &sa6->sin6_addr, 0, 0)) 341 } 342 #endif 343 344 if (in6p && in6p->in6p_ip6.ip6_nxt && 345 in6p->in6p_ip6.ip6_nxt == nxt) 346 valid++; 347 348 /* 349 * Depending on the value of "valid" and routing table 350 * size (mtudisc_{hi,lo}wat), we will: 351 * - recalculate the new MTU and create the 352 * corresponding routing entry, or 353 * - ignore the MTU change notification. 354 */ 355 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 356 357 /* 358 * regardless of if we called icmp6_mtudisc_update(), 359 * we need to call in6_pcbnotify(), to notify path 360 * MTU change to the userland (2292bis-02), because 361 * some unconnected sockets may share the same 362 * destination and want to know the path MTU. 363 */ 364 } 365 366 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 367 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 368 } 369 370 /* 371 * Generate IPv6 header and pass packet to ip6_output. 372 * Tack on options user may have setup with control call. 373 */ 374 int 375 #if __STDC__ 376 rip6_output(struct mbuf *m, ...) 377 #else 378 rip6_output(m, va_alist) 379 struct mbuf *m; 380 va_dcl 381 #endif 382 { 383 struct socket *so; 384 struct sockaddr_in6 *dstsock; 385 struct mbuf *control; 386 struct in6_addr *dst; 387 struct ip6_hdr *ip6; 388 struct in6pcb *in6p; 389 u_int plen = m->m_pkthdr.len; 390 int error = 0; 391 struct ip6_pktopts opt, *optp = NULL, *origoptp; 392 struct ifnet *oifp = NULL; 393 int type, code; /* for ICMPv6 output statistics only */ 394 int priv = 0; 395 va_list ap; 396 int flags; 397 398 va_start(ap, m); 399 so = va_arg(ap, struct socket *); 400 dstsock = va_arg(ap, struct sockaddr_in6 *); 401 control = va_arg(ap, struct mbuf *); 402 va_end(ap); 403 404 in6p = sotoin6pcb(so); 405 406 priv = 0; 407 { 408 struct proc *p = curproc; /* XXX */ 409 410 if (p && !suser(p->p_ucred, &p->p_acflag)) 411 priv = 1; 412 } 413 dst = &dstsock->sin6_addr; 414 if (control) { 415 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 416 goto bad; 417 optp = &opt; 418 } else 419 optp = in6p->in6p_outputopts; 420 421 /* 422 * For an ICMPv6 packet, we should know its type and code 423 * to update statistics. 424 */ 425 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 426 struct icmp6_hdr *icmp6; 427 if (m->m_len < sizeof(struct icmp6_hdr) && 428 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 429 error = ENOBUFS; 430 goto bad; 431 } 432 icmp6 = mtod(m, struct icmp6_hdr *); 433 type = icmp6->icmp6_type; 434 code = icmp6->icmp6_code; 435 } 436 437 M_PREPEND(m, sizeof(*ip6), M_WAIT); 438 ip6 = mtod(m, struct ip6_hdr *); 439 440 /* 441 * Next header might not be ICMP6 but use its pseudo header anyway. 442 */ 443 ip6->ip6_dst = *dst; 444 445 /* KAME hack: embed scopeid */ 446 origoptp = in6p->in6p_outputopts; 447 in6p->in6p_outputopts = optp; 448 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 449 error = EINVAL; 450 goto bad; 451 } 452 in6p->in6p_outputopts = origoptp; 453 454 /* 455 * Source address selection. 456 */ 457 { 458 struct in6_addr *in6a; 459 460 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 461 &in6p->in6p_route, &in6p->in6p_laddr, &error)) == 0) { 462 if (error == 0) 463 error = EADDRNOTAVAIL; 464 goto bad; 465 } 466 ip6->ip6_src = *in6a; 467 if (in6p->in6p_route.ro_rt) { 468 /* what if oifp contradicts ? */ 469 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 470 } 471 } 472 473 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 474 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 475 ip6->ip6_vfc |= IPV6_VERSION; 476 #if 0 /* ip6_plen will be filled in ip6_output. */ 477 ip6->ip6_plen = htons((u_short)plen); 478 #endif 479 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 480 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 481 482 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 483 in6p->in6p_cksum != -1) { 484 int off; 485 u_int16_t sum; 486 487 /* compute checksum */ 488 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 489 off = offsetof(struct icmp6_hdr, icmp6_cksum); 490 else 491 off = in6p->in6p_cksum; 492 if (plen < off + 1) { 493 error = EINVAL; 494 goto bad; 495 } 496 off += sizeof(struct ip6_hdr); 497 498 sum = 0; 499 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 500 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 501 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 502 } 503 504 #ifdef IPSEC 505 if (ipsec_setsocket(m, so) != 0) { 506 error = ENOBUFS; 507 goto bad; 508 } 509 #endif /* IPSEC */ 510 511 flags = 0; 512 #ifdef IN6P_MINMTU 513 if (in6p->in6p_flags & IN6P_MINMTU) 514 flags |= IPV6_MINMTU; 515 #endif 516 517 error = ip6_output(m, optp, &in6p->in6p_route, flags, 518 in6p->in6p_moptions, &oifp); 519 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 520 if (oifp) 521 icmp6_ifoutstat_inc(oifp, type, code); 522 icmp6stat.icp6s_outhist[type]++; 523 } else 524 rip6stat.rip6s_opackets++; 525 526 goto freectl; 527 528 bad: 529 if (m) 530 m_freem(m); 531 532 freectl: 533 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 534 RTFREE(optp->ip6po_route.ro_rt); 535 if (control) 536 m_freem(control); 537 return (error); 538 } 539 540 /* 541 * Raw IPv6 socket option processing. 542 */ 543 int 544 rip6_ctloutput(op, so, level, optname, mp) 545 int op; 546 struct socket *so; 547 int level, optname; 548 struct mbuf **mp; 549 { 550 int error = 0; 551 552 switch (level) { 553 case IPPROTO_IPV6: 554 switch (optname) { 555 case MRT6_INIT: 556 case MRT6_DONE: 557 case MRT6_ADD_MIF: 558 case MRT6_DEL_MIF: 559 case MRT6_ADD_MFC: 560 case MRT6_DEL_MFC: 561 case MRT6_PIM: 562 if (op == PRCO_SETOPT) { 563 error = ip6_mrouter_set(optname, so, *mp); 564 if (*mp) 565 (void)m_free(*mp); 566 } else if (op == PRCO_GETOPT) 567 error = ip6_mrouter_get(optname, so, mp); 568 else 569 error = EINVAL; 570 return (error); 571 case IPV6_CHECKSUM: 572 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 573 default: 574 return (ip6_ctloutput(op, so, level, optname, mp)); 575 } 576 577 case IPPROTO_ICMPV6: 578 /* 579 * XXX: is it better to call icmp6_ctloutput() directly 580 * from protosw? 581 */ 582 return (icmp6_ctloutput(op, so, level, optname, mp)); 583 584 default: 585 if (op == PRCO_SETOPT && *mp) 586 m_free(*mp); 587 return EINVAL; 588 } 589 } 590 591 extern u_long rip6_sendspace; 592 extern u_long rip6_recvspace; 593 594 int 595 rip6_usrreq(so, req, m, nam, control, p) 596 struct socket *so; 597 int req; 598 struct mbuf *m, *nam, *control; 599 struct proc *p; 600 { 601 struct in6pcb *in6p = sotoin6pcb(so); 602 int s; 603 int error = 0; 604 int priv; 605 606 priv = 0; 607 if (p && !suser(p->p_ucred, &p->p_acflag)) 608 priv++; 609 610 if (req == PRU_CONTROL) 611 return (in6_control(so, (u_long)m, (caddr_t)nam, 612 (struct ifnet *)control, p)); 613 614 if (req == PRU_PURGEIF) { 615 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 616 in6_purgeif((struct ifnet *)control); 617 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 618 return (0); 619 } 620 621 switch (req) { 622 case PRU_ATTACH: 623 if (in6p) 624 panic("rip6_attach"); 625 if (!priv) { 626 error = EACCES; 627 break; 628 } 629 s = splsoftnet(); 630 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 631 splx(s); 632 break; 633 } 634 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 635 { 636 splx(s); 637 break; 638 } 639 splx(s); 640 in6p = sotoin6pcb(so); 641 in6p->in6p_ip6.ip6_nxt = (long)nam; 642 in6p->in6p_cksum = -1; 643 644 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 645 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 646 if (in6p->in6p_icmp6filt == NULL) { 647 in6_pcbdetach(in6p); 648 error = ENOMEM; 649 break; 650 } 651 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 652 break; 653 654 case PRU_DISCONNECT: 655 if ((so->so_state & SS_ISCONNECTED) == 0) { 656 error = ENOTCONN; 657 break; 658 } 659 in6p->in6p_faddr = in6addr_any; 660 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 661 break; 662 663 case PRU_ABORT: 664 soisdisconnected(so); 665 /* Fallthrough */ 666 case PRU_DETACH: 667 if (in6p == 0) 668 panic("rip6_detach"); 669 if (so == ip6_mrouter) 670 ip6_mrouter_done(); 671 /* xxx: RSVP */ 672 if (in6p->in6p_icmp6filt) { 673 FREE(in6p->in6p_icmp6filt, M_PCB); 674 in6p->in6p_icmp6filt = NULL; 675 } 676 in6_pcbdetach(in6p); 677 break; 678 679 case PRU_BIND: 680 { 681 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 682 struct ifaddr *ia = NULL; 683 684 if (nam->m_len != sizeof(*addr)) { 685 error = EINVAL; 686 break; 687 } 688 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 689 error = EADDRNOTAVAIL; 690 break; 691 } 692 #ifdef ENABLE_DEFAULT_SCOPE 693 if (addr->sin6_scope_id == 0) /* not change if specified */ 694 addr->sin6_scope_id = 695 scope6_addr2default(&addr->sin6_addr); 696 #endif 697 /* KAME hack: embed scopeid */ 698 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 699 return EINVAL; 700 #ifndef SCOPEDROUTING 701 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 702 #endif 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 #ifdef ENABLE_DEFAULT_SCOPE 732 struct sockaddr_in6 sin6; 733 #endif 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 #ifdef ENABLE_DEFAULT_SCOPE 750 if (addr->sin6_scope_id == 0) { 751 /* protect *addr */ 752 sin6 = *addr; 753 addr = &sin6; 754 addr->sin6_scope_id = 755 scope6_addr2default(&addr->sin6_addr); 756 } 757 #endif 758 759 /* Source address selection. XXX: need pcblookup? */ 760 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 761 in6p->in6p_moptions, &in6p->in6p_route, 762 &in6p->in6p_laddr, &error); 763 if (in6a == NULL) { 764 if (error == 0) 765 error = EADDRNOTAVAIL; 766 break; 767 } 768 in6p->in6p_laddr = *in6a; 769 in6p->in6p_faddr = addr->sin6_addr; 770 soisconnected(so); 771 break; 772 } 773 774 case PRU_CONNECT2: 775 error = EOPNOTSUPP; 776 break; 777 778 /* 779 * Mark the connection as being incapable of futther input. 780 */ 781 case PRU_SHUTDOWN: 782 socantsendmore(so); 783 break; 784 /* 785 * Ship a packet out. The appropriate raw output 786 * routine handles any messaging necessary. 787 */ 788 case PRU_SEND: 789 { 790 struct sockaddr_in6 tmp; 791 struct sockaddr_in6 *dst; 792 793 /* always copy sockaddr to avoid overwrites */ 794 if (so->so_state & SS_ISCONNECTED) { 795 if (nam) { 796 error = EISCONN; 797 break; 798 } 799 /* XXX */ 800 bzero(&tmp, sizeof(tmp)); 801 tmp.sin6_family = AF_INET6; 802 tmp.sin6_len = sizeof(struct sockaddr_in6); 803 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 804 sizeof(struct in6_addr)); 805 dst = &tmp; 806 } else { 807 if (nam == NULL) { 808 error = ENOTCONN; 809 break; 810 } 811 if (nam->m_len != sizeof(tmp)) { 812 error = EINVAL; 813 break; 814 } 815 816 tmp = *mtod(nam, struct sockaddr_in6 *); 817 dst = &tmp; 818 819 if (dst->sin6_family != AF_INET6) { 820 error = EAFNOSUPPORT; 821 break; 822 } 823 } 824 #ifdef ENABLE_DEFAULT_SCOPE 825 if (dst->sin6_scope_id == 0) { 826 dst->sin6_scope_id = 827 scope6_addr2default(&dst->sin6_addr); 828 } 829 #endif 830 error = rip6_output(m, so, dst, control); 831 m = NULL; 832 break; 833 } 834 835 case PRU_SENSE: 836 /* 837 * stat: don't bother with a blocksize 838 */ 839 return (0); 840 /* 841 * Not supported. 842 */ 843 case PRU_RCVOOB: 844 case PRU_RCVD: 845 case PRU_LISTEN: 846 case PRU_ACCEPT: 847 case PRU_SENDOOB: 848 error = EOPNOTSUPP; 849 break; 850 851 case PRU_SOCKADDR: 852 in6_setsockaddr(in6p, nam); 853 break; 854 855 case PRU_PEERADDR: 856 in6_setpeeraddr(in6p, nam); 857 break; 858 859 default: 860 panic("rip6_usrreq"); 861 } 862 if (m != NULL) 863 m_freem(m); 864 return (error); 865 } 866