1 /* $OpenBSD: raw_ip6.c,v 1.5 2001/04/06 04:42:09 csapuntz 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 #ifdef __OpenBSD__ 97 #undef IPSEC 98 #endif 99 100 #ifdef IPSEC 101 #include <netinet6/ipsec.h> 102 #endif /*IPSEC*/ 103 104 #include <machine/stdarg.h> 105 106 #include "faith.h" 107 108 /* 109 * Raw interface to IP6 protocol. 110 */ 111 /* inpcb members */ 112 #define in6pcb inpcb 113 #define in6p_laddr inp_laddr6 114 #define in6p_faddr inp_faddr6 115 #define in6p_icmp6filt inp_icmp6filt 116 #define in6p_route inp_route6 117 #define in6p_socket inp_socket 118 #define in6p_flags inp_flags 119 #define in6p_moptions inp_moptions6 120 #define in6p_outputopts inp_outputopts6 121 #define in6p_ip6 inp_ipv6 122 #define in6p_flowinfo inp_flowinfo 123 #define in6p_sp inp_sp 124 #define in6p_next inp_next 125 #define in6p_prev inp_prev 126 /* macro names */ 127 #define sotoin6pcb sotoinpcb 128 /* function names */ 129 #define in6_pcbdetach in_pcbdetach 130 #define in6_rtchange in_rtchange 131 132 struct inpcbtable rawin6pcbtable; 133 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 134 135 /* 136 * Initialize raw connection block queue. 137 */ 138 void 139 rip6_init() 140 { 141 142 in_pcbinit(&rawin6pcbtable, 1); 143 } 144 145 /* 146 * Setup generic address and protocol structures 147 * for raw_input routine, then pass them along with 148 * mbuf chain. 149 */ 150 int 151 rip6_input(mp, offp, proto) 152 struct mbuf **mp; 153 int *offp, proto; 154 { 155 struct mbuf *m = *mp; 156 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 157 struct in6pcb *in6p; 158 struct in6pcb *last = NULL; 159 struct sockaddr_in6 rip6src; 160 struct mbuf *opts = NULL; 161 162 #if defined(NFAITH) && 0 < NFAITH 163 if (m->m_pkthdr.rcvif) { 164 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 165 /* send icmp6 host unreach? */ 166 m_freem(m); 167 return IPPROTO_DONE; 168 } 169 } 170 #endif 171 172 /* Be proactive about malicious use of IPv4 mapped address */ 173 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 174 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 175 /* XXX stat */ 176 m_freem(m); 177 return IPPROTO_DONE; 178 } 179 180 bzero(&rip6src, sizeof(rip6src)); 181 rip6src.sin6_len = sizeof(struct sockaddr_in6); 182 rip6src.sin6_family = AF_INET6; 183 #if 0 /*XXX inbound flowlabel */ 184 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 185 #endif 186 /* KAME hack: recover scopeid */ 187 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 188 189 for (in6p = rawin6pcbtable.inpt_queue.cqh_first; 190 in6p != (struct inpcb *)&rawin6pcbtable.inpt_queue; 191 in6p = in6p->inp_queue.cqe_next) 192 { 193 if (!(in6p->in6p_flags & INP_IPV6)) 194 continue; 195 if (in6p->in6p_ip6.ip6_nxt && 196 in6p->in6p_ip6.ip6_nxt != proto) 197 continue; 198 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 199 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 200 continue; 201 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 202 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 203 continue; 204 if (in6p->in6p_cksum != -1 205 && in6_cksum(m, ip6->ip6_nxt, *offp, m->m_pkthdr.len - *offp)) 206 { 207 /* XXX bark something */ 208 continue; 209 } 210 if (last) { 211 struct mbuf *n; 212 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 213 if (last->in6p_flags & IN6P_CONTROLOPTS) 214 ip6_savecontrol(last, &opts, ip6, n); 215 /* strip intermediate headers */ 216 m_adj(n, *offp); 217 if (sbappendaddr(&last->in6p_socket->so_rcv, 218 (struct sockaddr *)&rip6src, 219 n, opts) == 0) { 220 /* should notify about lost packet */ 221 m_freem(n); 222 if (opts) 223 m_freem(opts); 224 } else 225 sorwakeup(last->in6p_socket); 226 opts = NULL; 227 } 228 } 229 last = in6p; 230 } 231 if (last) { 232 if (last->in6p_flags & IN6P_CONTROLOPTS) 233 ip6_savecontrol(last, &opts, ip6, m); 234 /* strip intermediate headers */ 235 m_adj(m, *offp); 236 if (sbappendaddr(&last->in6p_socket->so_rcv, 237 (struct sockaddr *)&rip6src, m, opts) == 0) { 238 m_freem(m); 239 if (opts) 240 m_freem(opts); 241 } else 242 sorwakeup(last->in6p_socket); 243 } else { 244 if (proto == IPPROTO_NONE) 245 m_freem(m); 246 else { 247 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 248 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 249 icmp6_error(m, ICMP6_PARAM_PROB, 250 ICMP6_PARAMPROB_NEXTHEADER, 251 prvnxtp - mtod(m, char *)); 252 } 253 ip6stat.ip6s_delivered--; 254 } 255 return IPPROTO_DONE; 256 } 257 258 void 259 rip6_ctlinput(cmd, sa, d) 260 int cmd; 261 struct sockaddr *sa; 262 void *d; 263 { 264 struct ip6_hdr *ip6; 265 struct mbuf *m; 266 int off; 267 struct ip6ctlparam *ip6cp = NULL; 268 const struct sockaddr_in6 *sa6_src = NULL; 269 void *cmdarg; 270 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 271 int nxt; 272 273 if (sa->sa_family != AF_INET6 || 274 sa->sa_len != sizeof(struct sockaddr_in6)) 275 return; 276 277 if ((unsigned)cmd >= PRC_NCMDS) 278 return; 279 if (PRC_IS_REDIRECT(cmd)) 280 notify = in6_rtchange, d = NULL; 281 else if (cmd == PRC_HOSTDEAD) 282 d = NULL; 283 else if (cmd == PRC_MSGSIZE) 284 ; /* special code is present, see below */ 285 else if (inet6ctlerrmap[cmd] == 0) 286 return; 287 288 /* if the parameter is from icmp6, decode it. */ 289 if (d != NULL) { 290 ip6cp = (struct ip6ctlparam *)d; 291 m = ip6cp->ip6c_m; 292 ip6 = ip6cp->ip6c_ip6; 293 off = ip6cp->ip6c_off; 294 cmdarg = ip6cp->ip6c_cmdarg; 295 sa6_src = ip6cp->ip6c_src; 296 nxt = ip6cp->ip6c_nxt; 297 } else { 298 m = NULL; 299 ip6 = NULL; 300 cmdarg = NULL; 301 sa6_src = &sa6_any; 302 nxt = -1; 303 } 304 305 if (ip6 && cmd == PRC_MSGSIZE) { 306 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 307 int valid = 0; 308 struct in6pcb *in6p; 309 310 /* 311 * Check to see if we have a valid raw IPv6 socket 312 * corresponding to the address in the ICMPv6 message 313 * payload, and the protocol (ip6_nxt) meets the socket. 314 * XXX chase extension headers, or pass final nxt value 315 * from icmp6_notify_error() 316 */ 317 in6p = NULL; 318 in6p = in6_pcbhashlookup(&rawin6pcbtable, &sa6->sin6_addr, 0, 319 (struct in6_addr *)&sa6_src->sin6_addr, 0); 320 #if 0 321 if (!in6p) { 322 /* 323 * As the use of sendto(2) is fairly popular, 324 * we may want to allow non-connected pcb too. 325 * But it could be too weak against attacks... 326 * We should at least check if the local 327 * address (= s) is really ours. 328 */ 329 in6p = in_pcblookup(&rawin6pcbtable, &sa6->sin6_addr, 0, 330 (struct in6_addr *)&sa6_src->sin6_addr, 0, 331 INPLOOKUP_WILDCARD | INPLOOKUP_IPV6); 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 * - recalcurate 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(&rawin6pcbtable, 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 if ((so->so_state & SS_PRIV) != 0) 399 priv = 1; 400 dst = &dstsock->sin6_addr; 401 if (control) { 402 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 403 goto bad; 404 optp = &opt; 405 } else 406 optp = in6p->in6p_outputopts; 407 408 /* 409 * For an ICMPv6 packet, we should know its type and code 410 * to update statistics. 411 */ 412 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 413 struct icmp6_hdr *icmp6; 414 if (m->m_len < sizeof(struct icmp6_hdr) && 415 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 416 error = ENOBUFS; 417 goto bad; 418 } 419 icmp6 = mtod(m, struct icmp6_hdr *); 420 type = icmp6->icmp6_type; 421 code = icmp6->icmp6_code; 422 } 423 424 M_PREPEND(m, sizeof(*ip6), M_WAIT); 425 ip6 = mtod(m, struct ip6_hdr *); 426 427 /* 428 * Next header might not be ICMP6 but use its pseudo header anyway. 429 */ 430 ip6->ip6_dst = *dst; 431 432 /* KAME hack: embed scopeid */ 433 origoptp = in6p->in6p_outputopts; 434 in6p->in6p_outputopts = optp; 435 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 436 error = EINVAL; 437 goto bad; 438 } 439 in6p->in6p_outputopts = origoptp; 440 441 /* 442 * Source address selection. 443 */ 444 { 445 struct in6_addr *in6a; 446 447 if ((in6a = in6_selectsrc(dstsock, optp, 448 in6p->in6p_moptions, 449 &in6p->in6p_route, 450 &in6p->in6p_laddr, 451 &error)) == 0) { 452 if (error == 0) 453 error = EADDRNOTAVAIL; 454 goto bad; 455 } 456 ip6->ip6_src = *in6a; 457 if (in6p->in6p_route.ro_rt) { 458 /* what if oifp contradicts ? */ 459 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 460 } 461 } 462 463 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 464 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 465 ip6->ip6_vfc |= IPV6_VERSION; 466 #if 0 /* ip6_plen will be filled in ip6_output. */ 467 ip6->ip6_plen = htons((u_short)plen); 468 #endif 469 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 470 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 471 472 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 473 in6p->in6p_cksum != -1) { 474 int off; 475 u_int16_t sum; 476 477 /* compute checksum */ 478 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 479 off = offsetof(struct icmp6_hdr, icmp6_cksum); 480 else 481 off = in6p->in6p_cksum; 482 if (plen < off + 1) { 483 error = EINVAL; 484 goto bad; 485 } 486 off += sizeof(struct ip6_hdr); 487 488 sum = 0; 489 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 490 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 491 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 492 } 493 494 #ifdef IPSEC 495 if (ipsec_setsocket(m, so) != 0) { 496 error = ENOBUFS; 497 goto bad; 498 } 499 #endif /*IPSEC*/ 500 501 flags = 0; 502 #ifdef IN6P_MINMTU 503 if (in6p->in6p_flags & IN6P_MINMTU) 504 flags |= IPV6_MINMTU; 505 #endif 506 507 error = ip6_output(m, optp, &in6p->in6p_route, flags, 508 in6p->in6p_moptions, &oifp); 509 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 510 if (oifp) 511 icmp6_ifoutstat_inc(oifp, type, code); 512 icmp6stat.icp6s_outhist[type]++; 513 } 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, m) 534 int op; 535 struct socket *so; 536 int level, optname; 537 struct mbuf **m; 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, *m); 553 if (*m) 554 (void)m_free(*m); 555 } else if (op == PRCO_GETOPT) { 556 error = ip6_mrouter_get(optname, so, m); 557 } else 558 error = EINVAL; 559 return (error); 560 } 561 return (ip6_ctloutput(op, so, level, optname, m)); 562 /* NOTREACHED */ 563 564 case IPPROTO_ICMPV6: 565 /* 566 * XXX: is it better to call icmp6_ctloutput() directly 567 * from protosw? 568 */ 569 return(icmp6_ctloutput(op, so, level, optname, m)); 570 571 default: 572 if (op == PRCO_SETOPT && *m) 573 (void)m_free(*m); 574 return(EINVAL); 575 } 576 } 577 578 extern u_long rip6_sendspace; 579 extern u_long rip6_recvspace; 580 581 int 582 rip6_usrreq(so, req, m, nam, control, p) 583 struct socket *so; 584 int req; 585 struct mbuf *m, *nam, *control; 586 struct proc *p; 587 { 588 struct in6pcb *in6p = sotoin6pcb(so); 589 int s; 590 int error = 0; 591 /* extern struct socket *ip6_mrouter; */ /* xxx */ 592 int priv; 593 594 priv = 0; 595 if ((so->so_state & SS_PRIV) != 0) 596 priv++; 597 598 if (req == PRU_CONTROL) 599 return (in6_control(so, (u_long)m, (caddr_t)nam, 600 (struct ifnet *)control, p)); 601 602 switch (req) { 603 case PRU_ATTACH: 604 if (in6p) 605 panic("rip6_attach"); 606 if (!priv) { 607 error = EACCES; 608 break; 609 } 610 s = splnet(); 611 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 612 splx(s); 613 break; 614 } 615 if ((error = in_pcballoc(so, &rawin6pcbtable)) != 0) 616 { 617 splx(s); 618 break; 619 } 620 splx(s); 621 in6p = sotoin6pcb(so); 622 in6p->in6p_ip6.ip6_nxt = (long)nam; 623 in6p->in6p_cksum = -1; 624 #ifdef IPSEC 625 error = ipsec_init_policy(so, &in6p->in6p_sp); 626 if (error != 0) { 627 in6_pcbdetach(in6p); 628 break; 629 } 630 #endif /*IPSEC*/ 631 632 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 633 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 634 if (in6p->in6p_icmp6filt == NULL) { 635 in6_pcbdetach(in6p); 636 error = ENOMEM; 637 break; 638 } 639 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 640 break; 641 642 case PRU_DISCONNECT: 643 if ((so->so_state & SS_ISCONNECTED) == 0) { 644 error = ENOTCONN; 645 break; 646 } 647 in6p->in6p_faddr = in6addr_any; 648 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 649 break; 650 651 case PRU_ABORT: 652 soisdisconnected(so); 653 /* Fallthrough */ 654 case PRU_DETACH: 655 if (in6p == 0) 656 panic("rip6_detach"); 657 if (so == ip6_mrouter) 658 ip6_mrouter_done(); 659 /* xxx: RSVP */ 660 if (in6p->in6p_icmp6filt) { 661 FREE(in6p->in6p_icmp6filt, M_PCB); 662 in6p->in6p_icmp6filt = NULL; 663 } 664 in6_pcbdetach(in6p); 665 break; 666 667 case PRU_BIND: 668 { 669 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 670 struct ifaddr *ia = NULL; 671 672 if (nam->m_len != sizeof(*addr)) { 673 error = EINVAL; 674 break; 675 } 676 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 677 error = EADDRNOTAVAIL; 678 break; 679 } 680 #ifdef ENABLE_DEFAULT_SCOPE 681 if (addr->sin6_scope_id == 0) /* not change if specified */ 682 addr->sin6_scope_id = 683 scope6_addr2default(&addr->sin6_addr); 684 #endif 685 /* 686 * we don't support mapped address here, it would confuse 687 * users so reject it 688 */ 689 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 690 error = EADDRNOTAVAIL; 691 break; 692 } 693 /* 694 * Currently, ifa_ifwithaddr tends to fail for a link-local 695 * address, since it implicitly expects that the link ID 696 * for the address is embedded in the sin6_addr part. 697 * For now, we'd rather keep this "as is". We'll eventually fix 698 * this in a more natural way. 699 */ 700 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 701 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 702 error = EADDRNOTAVAIL; 703 break; 704 } 705 if (ia && 706 ((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, 751 &in6p->in6p_route, 752 &in6p->in6p_laddr, 753 &error); 754 if (in6a == NULL) { 755 if (error == 0) 756 error = EADDRNOTAVAIL; 757 break; 758 } 759 in6p->in6p_laddr = *in6a; 760 in6p->in6p_faddr = addr->sin6_addr; 761 soisconnected(so); 762 break; 763 } 764 765 case PRU_CONNECT2: 766 error = EOPNOTSUPP; 767 break; 768 769 /* 770 * Mark the connection as being incapable of futther input. 771 */ 772 case PRU_SHUTDOWN: 773 socantsendmore(so); 774 break; 775 /* 776 * Ship a packet out. The appropriate raw output 777 * routine handles any messaging necessary. 778 */ 779 case PRU_SEND: 780 { 781 struct sockaddr_in6 tmp; 782 struct sockaddr_in6 *dst; 783 784 /* always copy sockaddr to avoid overwrites */ 785 if (so->so_state & SS_ISCONNECTED) { 786 if (nam) { 787 error = EISCONN; 788 break; 789 } 790 /* XXX */ 791 bzero(&tmp, sizeof(tmp)); 792 tmp.sin6_family = AF_INET6; 793 tmp.sin6_len = sizeof(struct sockaddr_in6); 794 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 795 sizeof(struct in6_addr)); 796 dst = &tmp; 797 } else { 798 if (nam == NULL) { 799 error = ENOTCONN; 800 break; 801 } 802 tmp = *mtod(nam, struct sockaddr_in6 *); 803 dst = &tmp; 804 } 805 #ifdef ENABLE_DEFAULT_SCOPE 806 if (dst->sin6_scope_id == 0) { 807 dst->sin6_scope_id = 808 scope6_addr2default(&dst->sin6_addr); 809 } 810 #endif 811 error = rip6_output(m, so, dst, control); 812 m = NULL; 813 break; 814 } 815 816 case PRU_SENSE: 817 /* 818 * stat: don't bother with a blocksize 819 */ 820 return(0); 821 /* 822 * Not supported. 823 */ 824 case PRU_RCVOOB: 825 case PRU_RCVD: 826 case PRU_LISTEN: 827 case PRU_ACCEPT: 828 case PRU_SENDOOB: 829 error = EOPNOTSUPP; 830 break; 831 832 case PRU_SOCKADDR: 833 in6_setsockaddr(in6p, nam); 834 break; 835 836 case PRU_PEERADDR: 837 in6_setpeeraddr(in6p, nam); 838 break; 839 840 default: 841 panic("rip6_usrreq"); 842 } 843 if (m != NULL) 844 m_freem(m); 845 return(error); 846 } 847