1 /* $OpenBSD: raw_ip6.c,v 1.7 2001/12/07 09:16:07 itojun Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.69 2001/03/04 15:55:44 itojun 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/param.h> 69 #include <sys/malloc.h> 70 #include <sys/mbuf.h> 71 #include <sys/socket.h> 72 #include <sys/protosw.h> 73 #include <sys/socketvar.h> 74 #include <sys/errno.h> 75 #include <sys/systm.h> 76 77 #include <net/if.h> 78 #include <net/route.h> 79 #include <net/if_types.h> 80 81 #include <netinet/in.h> 82 #include <netinet/in_var.h> 83 #include <netinet/ip6.h> 84 #include <netinet6/ip6_var.h> 85 #include <netinet6/ip6_mroute.h> 86 #include <netinet/icmp6.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_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 96 #include <machine/stdarg.h> 97 98 #include "faith.h" 99 100 /* 101 * Raw interface to IP6 protocol. 102 */ 103 /* inpcb members */ 104 #define in6pcb inpcb 105 #define in6p_laddr inp_laddr6 106 #define in6p_faddr inp_faddr6 107 #define in6p_icmp6filt inp_icmp6filt 108 #define in6p_route inp_route6 109 #define in6p_socket inp_socket 110 #define in6p_flags inp_flags 111 #define in6p_moptions inp_moptions6 112 #define in6p_outputopts inp_outputopts6 113 #define in6p_ip6 inp_ipv6 114 #define in6p_flowinfo inp_flowinfo 115 #define in6p_sp inp_sp 116 #define in6p_next inp_next 117 #define in6p_prev inp_prev 118 /* macro names */ 119 #define sotoin6pcb sotoinpcb 120 /* function names */ 121 #define in6_pcbdetach in_pcbdetach 122 #define in6_rtchange in_rtchange 123 124 struct inpcbtable rawin6pcbtable; 125 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 126 127 /* 128 * Initialize raw connection block queue. 129 */ 130 void 131 rip6_init() 132 { 133 134 in_pcbinit(&rawin6pcbtable, 1); 135 } 136 137 /* 138 * Setup generic address and protocol structures 139 * for raw_input routine, then pass them along with 140 * mbuf chain. 141 */ 142 int 143 rip6_input(mp, offp, proto) 144 struct mbuf **mp; 145 int *offp, proto; 146 { 147 struct mbuf *m = *mp; 148 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 149 struct in6pcb *in6p; 150 struct in6pcb *last = NULL; 151 struct sockaddr_in6 rip6src; 152 struct mbuf *opts = NULL; 153 154 #if defined(NFAITH) && 0 < NFAITH 155 if (m->m_pkthdr.rcvif) { 156 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 157 /* send icmp6 host unreach? */ 158 m_freem(m); 159 return IPPROTO_DONE; 160 } 161 } 162 #endif 163 164 /* Be proactive about malicious use of IPv4 mapped address */ 165 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 166 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 167 /* XXX stat */ 168 m_freem(m); 169 return IPPROTO_DONE; 170 } 171 172 bzero(&rip6src, sizeof(rip6src)); 173 rip6src.sin6_len = sizeof(struct sockaddr_in6); 174 rip6src.sin6_family = AF_INET6; 175 #if 0 /* XXX inbound flowlabel */ 176 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 177 #endif 178 /* KAME hack: recover scopeid */ 179 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 180 181 for (in6p = rawin6pcbtable.inpt_queue.cqh_first; 182 in6p != (struct inpcb *)&rawin6pcbtable.inpt_queue; 183 in6p = in6p->inp_queue.cqe_next) 184 { 185 if (!(in6p->in6p_flags & INP_IPV6)) 186 continue; 187 if (in6p->in6p_ip6.ip6_nxt && 188 in6p->in6p_ip6.ip6_nxt != proto) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 192 continue; 193 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 194 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 195 continue; 196 if (in6p->in6p_cksum != -1 197 && in6_cksum(m, ip6->ip6_nxt, *offp, m->m_pkthdr.len - *offp)) 198 { 199 /* XXX bark something */ 200 continue; 201 } 202 if (last) { 203 struct mbuf *n; 204 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 205 if (last->in6p_flags & IN6P_CONTROLOPTS) 206 ip6_savecontrol(last, &opts, ip6, n); 207 /* strip intermediate headers */ 208 m_adj(n, *offp); 209 if (sbappendaddr(&last->in6p_socket->so_rcv, 210 (struct sockaddr *)&rip6src, 211 n, opts) == 0) { 212 /* should notify about lost packet */ 213 m_freem(n); 214 if (opts) 215 m_freem(opts); 216 } else 217 sorwakeup(last->in6p_socket); 218 opts = NULL; 219 } 220 } 221 last = in6p; 222 } 223 if (last) { 224 if (last->in6p_flags & IN6P_CONTROLOPTS) 225 ip6_savecontrol(last, &opts, ip6, m); 226 /* strip intermediate headers */ 227 m_adj(m, *offp); 228 if (sbappendaddr(&last->in6p_socket->so_rcv, 229 (struct sockaddr *)&rip6src, m, opts) == 0) { 230 m_freem(m); 231 if (opts) 232 m_freem(opts); 233 } else 234 sorwakeup(last->in6p_socket); 235 } else { 236 if (proto == IPPROTO_NONE) 237 m_freem(m); 238 else { 239 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 240 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 241 icmp6_error(m, ICMP6_PARAM_PROB, 242 ICMP6_PARAMPROB_NEXTHEADER, 243 prvnxtp - mtod(m, char *)); 244 } 245 ip6stat.ip6s_delivered--; 246 } 247 return IPPROTO_DONE; 248 } 249 250 void 251 rip6_ctlinput(cmd, sa, d) 252 int cmd; 253 struct sockaddr *sa; 254 void *d; 255 { 256 struct ip6_hdr *ip6; 257 struct mbuf *m; 258 int off; 259 struct ip6ctlparam *ip6cp = NULL; 260 const struct sockaddr_in6 *sa6_src = NULL; 261 void *cmdarg; 262 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 263 int nxt; 264 265 if (sa->sa_family != AF_INET6 || 266 sa->sa_len != sizeof(struct sockaddr_in6)) 267 return; 268 269 if ((unsigned)cmd >= PRC_NCMDS) 270 return; 271 if (PRC_IS_REDIRECT(cmd)) 272 notify = in6_rtchange, d = NULL; 273 else if (cmd == PRC_HOSTDEAD) 274 d = NULL; 275 else if (cmd == PRC_MSGSIZE) 276 ; /* special code is present, see below */ 277 else if (inet6ctlerrmap[cmd] == 0) 278 return; 279 280 /* if the parameter is from icmp6, decode it. */ 281 if (d != NULL) { 282 ip6cp = (struct ip6ctlparam *)d; 283 m = ip6cp->ip6c_m; 284 ip6 = ip6cp->ip6c_ip6; 285 off = ip6cp->ip6c_off; 286 cmdarg = ip6cp->ip6c_cmdarg; 287 sa6_src = ip6cp->ip6c_src; 288 nxt = ip6cp->ip6c_nxt; 289 } else { 290 m = NULL; 291 ip6 = NULL; 292 cmdarg = NULL; 293 sa6_src = &sa6_any; 294 nxt = -1; 295 } 296 297 if (ip6 && cmd == PRC_MSGSIZE) { 298 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 299 int valid = 0; 300 struct in6pcb *in6p; 301 302 /* 303 * Check to see if we have a valid raw IPv6 socket 304 * corresponding to the address in the ICMPv6 message 305 * payload, and the protocol (ip6_nxt) meets the socket. 306 * XXX chase extension headers, or pass final nxt value 307 * from icmp6_notify_error() 308 */ 309 in6p = NULL; 310 in6p = in6_pcbhashlookup(&rawin6pcbtable, &sa6->sin6_addr, 0, 311 (struct in6_addr *)&sa6_src->sin6_addr, 0); 312 #if 0 313 if (!in6p) { 314 /* 315 * As the use of sendto(2) is fairly popular, 316 * we may want to allow non-connected pcb too. 317 * But it could be too weak against attacks... 318 * We should at least check if the local 319 * address (= s) is really ours. 320 */ 321 in6p = in_pcblookup(&rawin6pcbtable, &sa6->sin6_addr, 0, 322 (struct in6_addr *)&sa6_src->sin6_addr, 0, 323 INPLOOKUP_WILDCARD | INPLOOKUP_IPV6); 324 } 325 #endif 326 327 if (in6p && in6p->in6p_ip6.ip6_nxt && 328 in6p->in6p_ip6.ip6_nxt == nxt) 329 valid++; 330 331 /* 332 * Depending on the value of "valid" and routing table 333 * size (mtudisc_{hi,lo}wat), we will: 334 * - recalcurate the new MTU and create the 335 * corresponding routing entry, or 336 * - ignore the MTU change notification. 337 */ 338 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 339 340 /* 341 * regardless of if we called icmp6_mtudisc_update(), 342 * we need to call in6_pcbnotify(), to notify path 343 * MTU change to the userland (2292bis-02), because 344 * some unconnected sockets may share the same 345 * destination and want to know the path MTU. 346 */ 347 } 348 349 (void) in6_pcbnotify(&rawin6pcbtable, sa, 0, 350 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 351 } 352 353 /* 354 * Generate IPv6 header and pass packet to ip6_output. 355 * Tack on options user may have setup with control call. 356 */ 357 int 358 #if __STDC__ 359 rip6_output(struct mbuf *m, ...) 360 #else 361 rip6_output(m, va_alist) 362 struct mbuf *m; 363 va_dcl 364 #endif 365 { 366 struct socket *so; 367 struct sockaddr_in6 *dstsock; 368 struct mbuf *control; 369 struct in6_addr *dst; 370 struct ip6_hdr *ip6; 371 struct in6pcb *in6p; 372 u_int plen = m->m_pkthdr.len; 373 int error = 0; 374 struct ip6_pktopts opt, *optp = NULL, *origoptp; 375 struct ifnet *oifp = NULL; 376 int type, code; /* for ICMPv6 output statistics only */ 377 int priv = 0; 378 va_list ap; 379 int flags; 380 381 va_start(ap, m); 382 so = va_arg(ap, struct socket *); 383 dstsock = va_arg(ap, struct sockaddr_in6 *); 384 control = va_arg(ap, struct mbuf *); 385 va_end(ap); 386 387 in6p = sotoin6pcb(so); 388 389 priv = 0; 390 if ((so->so_state & SS_PRIV) != 0) 391 priv = 1; 392 dst = &dstsock->sin6_addr; 393 if (control) { 394 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 395 goto bad; 396 optp = &opt; 397 } else 398 optp = in6p->in6p_outputopts; 399 400 /* 401 * For an ICMPv6 packet, we should know its type and code 402 * to update statistics. 403 */ 404 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 405 struct icmp6_hdr *icmp6; 406 if (m->m_len < sizeof(struct icmp6_hdr) && 407 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 408 error = ENOBUFS; 409 goto bad; 410 } 411 icmp6 = mtod(m, struct icmp6_hdr *); 412 type = icmp6->icmp6_type; 413 code = icmp6->icmp6_code; 414 } 415 416 M_PREPEND(m, sizeof(*ip6), M_WAIT); 417 ip6 = mtod(m, struct ip6_hdr *); 418 419 /* 420 * Next header might not be ICMP6 but use its pseudo header anyway. 421 */ 422 ip6->ip6_dst = *dst; 423 424 /* KAME hack: embed scopeid */ 425 origoptp = in6p->in6p_outputopts; 426 in6p->in6p_outputopts = optp; 427 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 428 error = EINVAL; 429 goto bad; 430 } 431 in6p->in6p_outputopts = origoptp; 432 433 /* 434 * Source address selection. 435 */ 436 { 437 struct in6_addr *in6a; 438 439 if ((in6a = in6_selectsrc(dstsock, optp, 440 in6p->in6p_moptions, 441 &in6p->in6p_route, 442 &in6p->in6p_laddr, 443 &error)) == 0) { 444 if (error == 0) 445 error = EADDRNOTAVAIL; 446 goto bad; 447 } 448 ip6->ip6_src = *in6a; 449 if (in6p->in6p_route.ro_rt) { 450 /* what if oifp contradicts ? */ 451 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 452 } 453 } 454 455 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 456 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 457 ip6->ip6_vfc |= IPV6_VERSION; 458 #if 0 /* ip6_plen will be filled in ip6_output. */ 459 ip6->ip6_plen = htons((u_short)plen); 460 #endif 461 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 462 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 463 464 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 465 in6p->in6p_cksum != -1) { 466 int off; 467 u_int16_t sum; 468 469 /* compute checksum */ 470 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 471 off = offsetof(struct icmp6_hdr, icmp6_cksum); 472 else 473 off = in6p->in6p_cksum; 474 if (plen < off + 1) { 475 error = EINVAL; 476 goto bad; 477 } 478 off += sizeof(struct ip6_hdr); 479 480 sum = 0; 481 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 482 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 483 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 484 } 485 486 flags = 0; 487 #ifdef IN6P_MINMTU 488 if (in6p->in6p_flags & IN6P_MINMTU) 489 flags |= IPV6_MINMTU; 490 #endif 491 492 error = ip6_output(m, optp, &in6p->in6p_route, flags, 493 in6p->in6p_moptions, &oifp); 494 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 495 if (oifp) 496 icmp6_ifoutstat_inc(oifp, type, code); 497 icmp6stat.icp6s_outhist[type]++; 498 } 499 500 goto freectl; 501 502 bad: 503 if (m) 504 m_freem(m); 505 506 freectl: 507 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 508 RTFREE(optp->ip6po_route.ro_rt); 509 if (control) 510 m_freem(control); 511 return(error); 512 } 513 514 /* 515 * Raw IPv6 socket option processing. 516 */ 517 int 518 rip6_ctloutput(op, so, level, optname, m) 519 int op; 520 struct socket *so; 521 int level, optname; 522 struct mbuf **m; 523 { 524 int error = 0; 525 526 switch (level) { 527 case IPPROTO_IPV6: 528 switch (optname) { 529 case MRT6_INIT: 530 case MRT6_DONE: 531 case MRT6_ADD_MIF: 532 case MRT6_DEL_MIF: 533 case MRT6_ADD_MFC: 534 case MRT6_DEL_MFC: 535 case MRT6_PIM: 536 if (op == PRCO_SETOPT) { 537 error = ip6_mrouter_set(optname, so, *m); 538 if (*m) 539 (void)m_free(*m); 540 } else if (op == PRCO_GETOPT) { 541 error = ip6_mrouter_get(optname, so, m); 542 } else 543 error = EINVAL; 544 return (error); 545 } 546 return (ip6_ctloutput(op, so, level, optname, m)); 547 /* NOTREACHED */ 548 549 case IPPROTO_ICMPV6: 550 /* 551 * XXX: is it better to call icmp6_ctloutput() directly 552 * from protosw? 553 */ 554 return(icmp6_ctloutput(op, so, level, optname, m)); 555 556 default: 557 if (op == PRCO_SETOPT && *m) 558 (void)m_free(*m); 559 return(EINVAL); 560 } 561 } 562 563 extern u_long rip6_sendspace; 564 extern u_long rip6_recvspace; 565 566 int 567 rip6_usrreq(so, req, m, nam, control, p) 568 struct socket *so; 569 int req; 570 struct mbuf *m, *nam, *control; 571 struct proc *p; 572 { 573 struct in6pcb *in6p = sotoin6pcb(so); 574 int s; 575 int error = 0; 576 /* extern struct socket *ip6_mrouter; */ /* xxx */ 577 int priv; 578 579 priv = 0; 580 if ((so->so_state & SS_PRIV) != 0) 581 priv++; 582 583 if (req == PRU_CONTROL) 584 return (in6_control(so, (u_long)m, (caddr_t)nam, 585 (struct ifnet *)control, p)); 586 587 switch (req) { 588 case PRU_ATTACH: 589 if (in6p) 590 panic("rip6_attach"); 591 if (!priv) { 592 error = EACCES; 593 break; 594 } 595 s = splnet(); 596 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 597 splx(s); 598 break; 599 } 600 if ((error = in_pcballoc(so, &rawin6pcbtable)) != 0) 601 { 602 splx(s); 603 break; 604 } 605 splx(s); 606 in6p = sotoin6pcb(so); 607 in6p->in6p_ip6.ip6_nxt = (long)nam; 608 in6p->in6p_cksum = -1; 609 610 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 611 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 612 if (in6p->in6p_icmp6filt == NULL) { 613 in6_pcbdetach(in6p); 614 error = ENOMEM; 615 break; 616 } 617 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 618 break; 619 620 case PRU_DISCONNECT: 621 if ((so->so_state & SS_ISCONNECTED) == 0) { 622 error = ENOTCONN; 623 break; 624 } 625 in6p->in6p_faddr = in6addr_any; 626 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 627 break; 628 629 case PRU_ABORT: 630 soisdisconnected(so); 631 /* Fallthrough */ 632 case PRU_DETACH: 633 if (in6p == 0) 634 panic("rip6_detach"); 635 if (so == ip6_mrouter) 636 ip6_mrouter_done(); 637 /* xxx: RSVP */ 638 if (in6p->in6p_icmp6filt) { 639 FREE(in6p->in6p_icmp6filt, M_PCB); 640 in6p->in6p_icmp6filt = NULL; 641 } 642 in6_pcbdetach(in6p); 643 break; 644 645 case PRU_BIND: 646 { 647 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 648 struct ifaddr *ia = NULL; 649 650 if (nam->m_len != sizeof(*addr)) { 651 error = EINVAL; 652 break; 653 } 654 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 655 error = EADDRNOTAVAIL; 656 break; 657 } 658 #ifdef ENABLE_DEFAULT_SCOPE 659 if (addr->sin6_scope_id == 0) /* not change if specified */ 660 addr->sin6_scope_id = 661 scope6_addr2default(&addr->sin6_addr); 662 #endif 663 /* 664 * we don't support mapped address here, it would confuse 665 * users so reject it 666 */ 667 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 668 error = EADDRNOTAVAIL; 669 break; 670 } 671 /* 672 * Currently, ifa_ifwithaddr tends to fail for a link-local 673 * address, since it implicitly expects that the link ID 674 * for the address is embedded in the sin6_addr part. 675 * For now, we'd rather keep this "as is". We'll eventually fix 676 * this in a more natural way. 677 */ 678 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 679 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 680 error = EADDRNOTAVAIL; 681 break; 682 } 683 if (ia && 684 ((struct in6_ifaddr *)ia)->ia6_flags & 685 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 686 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 687 error = EADDRNOTAVAIL; 688 break; 689 } 690 in6p->in6p_laddr = addr->sin6_addr; 691 break; 692 } 693 694 case PRU_CONNECT: 695 { 696 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 697 struct in6_addr *in6a = NULL; 698 #ifdef ENABLE_DEFAULT_SCOPE 699 struct sockaddr_in6 sin6; 700 #endif 701 702 if (nam->m_len != sizeof(*addr)) { 703 error = EINVAL; 704 break; 705 } 706 if (ifnet.tqh_first == 0) 707 { 708 error = EADDRNOTAVAIL; 709 break; 710 } 711 if (addr->sin6_family != AF_INET6) { 712 error = EAFNOSUPPORT; 713 break; 714 } 715 716 #ifdef ENABLE_DEFAULT_SCOPE 717 if (addr->sin6_scope_id == 0) { 718 /* protect *addr */ 719 sin6 = *addr; 720 addr = &sin6; 721 addr->sin6_scope_id = 722 scope6_addr2default(&addr->sin6_addr); 723 } 724 #endif 725 726 /* Source address selection. XXX: need pcblookup? */ 727 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 728 in6p->in6p_moptions, 729 &in6p->in6p_route, 730 &in6p->in6p_laddr, 731 &error); 732 if (in6a == NULL) { 733 if (error == 0) 734 error = EADDRNOTAVAIL; 735 break; 736 } 737 in6p->in6p_laddr = *in6a; 738 in6p->in6p_faddr = addr->sin6_addr; 739 soisconnected(so); 740 break; 741 } 742 743 case PRU_CONNECT2: 744 error = EOPNOTSUPP; 745 break; 746 747 /* 748 * Mark the connection as being incapable of futther input. 749 */ 750 case PRU_SHUTDOWN: 751 socantsendmore(so); 752 break; 753 /* 754 * Ship a packet out. The appropriate raw output 755 * routine handles any messaging necessary. 756 */ 757 case PRU_SEND: 758 { 759 struct sockaddr_in6 tmp; 760 struct sockaddr_in6 *dst; 761 762 /* always copy sockaddr to avoid overwrites */ 763 if (so->so_state & SS_ISCONNECTED) { 764 if (nam) { 765 error = EISCONN; 766 break; 767 } 768 /* XXX */ 769 bzero(&tmp, sizeof(tmp)); 770 tmp.sin6_family = AF_INET6; 771 tmp.sin6_len = sizeof(struct sockaddr_in6); 772 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 773 sizeof(struct in6_addr)); 774 dst = &tmp; 775 } else { 776 if (nam == NULL) { 777 error = ENOTCONN; 778 break; 779 } 780 tmp = *mtod(nam, struct sockaddr_in6 *); 781 dst = &tmp; 782 } 783 #ifdef ENABLE_DEFAULT_SCOPE 784 if (dst->sin6_scope_id == 0) { 785 dst->sin6_scope_id = 786 scope6_addr2default(&dst->sin6_addr); 787 } 788 #endif 789 error = rip6_output(m, so, dst, control); 790 m = NULL; 791 break; 792 } 793 794 case PRU_SENSE: 795 /* 796 * stat: don't bother with a blocksize 797 */ 798 return(0); 799 /* 800 * Not supported. 801 */ 802 case PRU_RCVOOB: 803 case PRU_RCVD: 804 case PRU_LISTEN: 805 case PRU_ACCEPT: 806 case PRU_SENDOOB: 807 error = EOPNOTSUPP; 808 break; 809 810 case PRU_SOCKADDR: 811 in6_setsockaddr(in6p, nam); 812 break; 813 814 case PRU_PEERADDR: 815 in6_setpeeraddr(in6p, nam); 816 break; 817 818 default: 819 panic("rip6_usrreq"); 820 } 821 if (m != NULL) 822 m_freem(m); 823 return(error); 824 } 825