raw_ip6.c revision 1.58
1 /* $NetBSD: raw_ip6.c,v 1.58 2003/08/22 22:00:41 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 1.58 2003/08/22 22:00:41 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 struct in6pcb rawin6pcb; 109 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 110 111 /* 112 * Raw interface to IP6 protocol. 113 */ 114 115 struct rip6stat rip6stat; 116 117 /* 118 * Initialize raw connection block queue. 119 */ 120 void 121 rip6_init() 122 { 123 124 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 125 } 126 127 /* 128 * Setup generic address and protocol structures 129 * for raw_input routine, then pass them along with 130 * mbuf chain. 131 */ 132 int 133 rip6_input(mp, offp, proto) 134 struct mbuf **mp; 135 int *offp, proto; 136 { 137 struct mbuf *m = *mp; 138 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 139 struct in6pcb *in6p; 140 struct in6pcb *last = NULL; 141 struct sockaddr_in6 rip6src; 142 struct mbuf *opts = NULL; 143 144 rip6stat.rip6s_ipackets++; 145 146 #if defined(NFAITH) && 0 < NFAITH 147 if (faithprefix(&ip6->ip6_dst)) { 148 /* send icmp6 host unreach? */ 149 m_freem(m); 150 return IPPROTO_DONE; 151 } 152 #endif 153 154 /* Be proactive about malicious use of IPv4 mapped address */ 155 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 156 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 157 /* XXX stat */ 158 m_freem(m); 159 return IPPROTO_DONE; 160 } 161 162 bzero(&rip6src, sizeof(rip6src)); 163 rip6src.sin6_len = sizeof(struct sockaddr_in6); 164 rip6src.sin6_family = AF_INET6; 165 #if 0 /* XXX inbound flowlabel */ 166 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 167 #endif 168 /* KAME hack: recover scopeid */ 169 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 170 171 for (in6p = rawin6pcb.in6p_next; 172 in6p != &rawin6pcb; in6p = in6p->in6p_next) 173 { 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, ip6->ip6_nxt, *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 mbuf *m; 272 int off; 273 struct ip6ctlparam *ip6cp = NULL; 274 const struct sockaddr_in6 *sa6_src = NULL; 275 void *cmdarg; 276 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 277 int nxt; 278 279 if (sa->sa_family != AF_INET6 || 280 sa->sa_len != sizeof(struct sockaddr_in6)) 281 return; 282 283 if ((unsigned)cmd >= PRC_NCMDS) 284 return; 285 if (PRC_IS_REDIRECT(cmd)) 286 notify = in6_rtchange, d = NULL; 287 else if (cmd == PRC_HOSTDEAD) 288 d = NULL; 289 else if (cmd == PRC_MSGSIZE) 290 ; /* special code is present, see below */ 291 else if (inet6ctlerrmap[cmd] == 0) 292 return; 293 294 /* if the parameter is from icmp6, decode it. */ 295 if (d != NULL) { 296 ip6cp = (struct ip6ctlparam *)d; 297 m = ip6cp->ip6c_m; 298 ip6 = ip6cp->ip6c_ip6; 299 off = ip6cp->ip6c_off; 300 cmdarg = ip6cp->ip6c_cmdarg; 301 sa6_src = ip6cp->ip6c_src; 302 nxt = ip6cp->ip6c_nxt; 303 } else { 304 m = NULL; 305 ip6 = NULL; 306 cmdarg = NULL; 307 sa6_src = &sa6_any; 308 nxt = -1; 309 } 310 311 if (ip6 && cmd == PRC_MSGSIZE) { 312 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 313 int valid = 0; 314 struct in6pcb *in6p; 315 316 /* 317 * Check to see if we have a valid raw IPv6 socket 318 * corresponding to the address in the ICMPv6 message 319 * payload, and the protocol (ip6_nxt) meets the socket. 320 * XXX chase extension headers, or pass final nxt value 321 * from icmp6_notify_error() 322 */ 323 in6p = NULL; 324 in6p = in6_pcblookup_connect(&rawin6pcb, &sa6->sin6_addr, 0, 325 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 326 #if 0 327 if (!in6p) { 328 /* 329 * As the use of sendto(2) is fairly popular, 330 * we may want to allow non-connected pcb too. 331 * But it could be too weak against attacks... 332 * We should at least check if the local 333 * address (= s) is really ours. 334 */ 335 in6p = in6_pcblookup_bind(&rawin6pcb, 336 &sa6->sin6_addr, 0, 0)) 337 } 338 #endif 339 340 if (in6p && in6p->in6p_ip6.ip6_nxt && 341 in6p->in6p_ip6.ip6_nxt == nxt) 342 valid++; 343 344 /* 345 * Depending on the value of "valid" and routing table 346 * size (mtudisc_{hi,lo}wat), we will: 347 * - recalculate the new MTU and create the 348 * corresponding routing entry, or 349 * - ignore the MTU change notification. 350 */ 351 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 352 353 /* 354 * regardless of if we called icmp6_mtudisc_update(), 355 * we need to call in6_pcbnotify(), to notify path 356 * MTU change to the userland (2292bis-02), because 357 * some unconnected sockets may share the same 358 * destination and want to know the path MTU. 359 */ 360 } 361 362 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 363 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 364 } 365 366 /* 367 * Generate IPv6 header and pass packet to ip6_output. 368 * Tack on options user may have setup with control call. 369 */ 370 int 371 #if __STDC__ 372 rip6_output(struct mbuf *m, ...) 373 #else 374 rip6_output(m, va_alist) 375 struct mbuf *m; 376 va_dcl 377 #endif 378 { 379 struct socket *so; 380 struct sockaddr_in6 *dstsock; 381 struct mbuf *control; 382 struct in6_addr *dst; 383 struct ip6_hdr *ip6; 384 struct in6pcb *in6p; 385 u_int plen = m->m_pkthdr.len; 386 int error = 0; 387 struct ip6_pktopts opt, *optp = NULL, *origoptp; 388 struct ifnet *oifp = NULL; 389 int type, code; /* for ICMPv6 output statistics only */ 390 int priv = 0; 391 va_list ap; 392 int flags; 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 { 404 struct proc *p = curproc; /* XXX */ 405 406 if (p && !suser(p->p_ucred, &p->p_acflag)) 407 priv = 1; 408 } 409 dst = &dstsock->sin6_addr; 410 if (control) { 411 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 412 goto bad; 413 optp = &opt; 414 } else 415 optp = in6p->in6p_outputopts; 416 417 /* 418 * For an ICMPv6 packet, we should know its type and code 419 * to update statistics. 420 */ 421 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 422 struct icmp6_hdr *icmp6; 423 if (m->m_len < sizeof(struct icmp6_hdr) && 424 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 425 error = ENOBUFS; 426 goto bad; 427 } 428 icmp6 = mtod(m, struct icmp6_hdr *); 429 type = icmp6->icmp6_type; 430 code = icmp6->icmp6_code; 431 } 432 433 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 434 if (!m) { 435 error = ENOBUFS; 436 goto bad; 437 } 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 flags = 0; 505 #ifdef IN6P_MINMTU 506 if (in6p->in6p_flags & IN6P_MINMTU) 507 flags |= IPV6_MINMTU; 508 #endif 509 510 error = ip6_output(m, optp, &in6p->in6p_route, flags, 511 in6p->in6p_moptions, so, &oifp); 512 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 513 if (oifp) 514 icmp6_ifoutstat_inc(oifp, type, code); 515 icmp6stat.icp6s_outhist[type]++; 516 } else 517 rip6stat.rip6s_opackets++; 518 519 goto freectl; 520 521 bad: 522 if (m) 523 m_freem(m); 524 525 freectl: 526 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 527 RTFREE(optp->ip6po_route.ro_rt); 528 if (control) 529 m_freem(control); 530 return (error); 531 } 532 533 /* 534 * Raw IPv6 socket option processing. 535 */ 536 int 537 rip6_ctloutput(op, so, level, optname, mp) 538 int op; 539 struct socket *so; 540 int level, optname; 541 struct mbuf **mp; 542 { 543 int error = 0; 544 545 switch (level) { 546 case IPPROTO_IPV6: 547 switch (optname) { 548 case MRT6_INIT: 549 case MRT6_DONE: 550 case MRT6_ADD_MIF: 551 case MRT6_DEL_MIF: 552 case MRT6_ADD_MFC: 553 case MRT6_DEL_MFC: 554 case MRT6_PIM: 555 if (op == PRCO_SETOPT) { 556 error = ip6_mrouter_set(optname, so, *mp); 557 if (*mp) 558 (void)m_free(*mp); 559 } else if (op == PRCO_GETOPT) 560 error = ip6_mrouter_get(optname, so, mp); 561 else 562 error = EINVAL; 563 return (error); 564 case IPV6_CHECKSUM: 565 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 566 default: 567 return (ip6_ctloutput(op, so, level, optname, mp)); 568 } 569 570 case IPPROTO_ICMPV6: 571 /* 572 * XXX: is it better to call icmp6_ctloutput() directly 573 * from protosw? 574 */ 575 return (icmp6_ctloutput(op, so, level, optname, mp)); 576 577 default: 578 if (op == PRCO_SETOPT && *mp) 579 m_free(*mp); 580 return EINVAL; 581 } 582 } 583 584 extern u_long rip6_sendspace; 585 extern u_long rip6_recvspace; 586 587 int 588 rip6_usrreq(so, req, m, nam, control, p) 589 struct socket *so; 590 int req; 591 struct mbuf *m, *nam, *control; 592 struct proc *p; 593 { 594 struct in6pcb *in6p = sotoin6pcb(so); 595 int s; 596 int error = 0; 597 int priv; 598 599 priv = 0; 600 if (p && !suser(p->p_ucred, &p->p_acflag)) 601 priv++; 602 603 if (req == PRU_CONTROL) 604 return (in6_control(so, (u_long)m, (caddr_t)nam, 605 (struct ifnet *)control, p)); 606 607 if (req == PRU_PURGEIF) { 608 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 609 in6_purgeif((struct ifnet *)control); 610 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 611 return (0); 612 } 613 614 switch (req) { 615 case PRU_ATTACH: 616 if (in6p) 617 panic("rip6_attach"); 618 if (!priv) { 619 error = EACCES; 620 break; 621 } 622 s = splsoftnet(); 623 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 624 splx(s); 625 break; 626 } 627 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 628 { 629 splx(s); 630 break; 631 } 632 splx(s); 633 in6p = sotoin6pcb(so); 634 in6p->in6p_ip6.ip6_nxt = (long)nam; 635 in6p->in6p_cksum = -1; 636 637 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 638 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 639 if (in6p->in6p_icmp6filt == NULL) { 640 in6_pcbdetach(in6p); 641 error = ENOMEM; 642 break; 643 } 644 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 645 break; 646 647 case PRU_DISCONNECT: 648 if ((so->so_state & SS_ISCONNECTED) == 0) { 649 error = ENOTCONN; 650 break; 651 } 652 in6p->in6p_faddr = in6addr_any; 653 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 654 break; 655 656 case PRU_ABORT: 657 soisdisconnected(so); 658 /* Fallthrough */ 659 case PRU_DETACH: 660 if (in6p == 0) 661 panic("rip6_detach"); 662 if (so == ip6_mrouter) 663 ip6_mrouter_done(); 664 /* xxx: RSVP */ 665 if (in6p->in6p_icmp6filt) { 666 FREE(in6p->in6p_icmp6filt, M_PCB); 667 in6p->in6p_icmp6filt = NULL; 668 } 669 in6_pcbdetach(in6p); 670 break; 671 672 case PRU_BIND: 673 { 674 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 675 struct ifaddr *ia = NULL; 676 677 if (nam->m_len != sizeof(*addr)) { 678 error = EINVAL; 679 break; 680 } 681 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 682 error = EADDRNOTAVAIL; 683 break; 684 } 685 #ifdef ENABLE_DEFAULT_SCOPE 686 if (addr->sin6_scope_id == 0) /* not change if specified */ 687 addr->sin6_scope_id = 688 scope6_addr2default(&addr->sin6_addr); 689 #endif 690 /* KAME hack: embed scopeid */ 691 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 692 return EINVAL; 693 #ifndef SCOPEDROUTING 694 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 695 #endif 696 697 /* 698 * we don't support mapped address here, it would confuse 699 * users so reject it 700 */ 701 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 702 error = EADDRNOTAVAIL; 703 break; 704 } 705 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 706 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 707 error = EADDRNOTAVAIL; 708 break; 709 } 710 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 711 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 712 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 713 error = EADDRNOTAVAIL; 714 break; 715 } 716 in6p->in6p_laddr = addr->sin6_addr; 717 break; 718 } 719 720 case PRU_CONNECT: 721 { 722 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 723 struct in6_addr *in6a = NULL; 724 #ifdef ENABLE_DEFAULT_SCOPE 725 struct sockaddr_in6 sin6; 726 #endif 727 728 if (nam->m_len != sizeof(*addr)) { 729 error = EINVAL; 730 break; 731 } 732 if (ifnet.tqh_first == 0) 733 { 734 error = EADDRNOTAVAIL; 735 break; 736 } 737 if (addr->sin6_family != AF_INET6) { 738 error = EAFNOSUPPORT; 739 break; 740 } 741 742 #ifdef ENABLE_DEFAULT_SCOPE 743 if (addr->sin6_scope_id == 0) { 744 /* protect *addr */ 745 sin6 = *addr; 746 addr = &sin6; 747 addr->sin6_scope_id = 748 scope6_addr2default(&addr->sin6_addr); 749 } 750 #endif 751 752 /* Source address selection. XXX: need pcblookup? */ 753 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 754 in6p->in6p_moptions, &in6p->in6p_route, 755 &in6p->in6p_laddr, &error); 756 if (in6a == NULL) { 757 if (error == 0) 758 error = EADDRNOTAVAIL; 759 break; 760 } 761 in6p->in6p_laddr = *in6a; 762 in6p->in6p_faddr = addr->sin6_addr; 763 soisconnected(so); 764 break; 765 } 766 767 case PRU_CONNECT2: 768 error = EOPNOTSUPP; 769 break; 770 771 /* 772 * Mark the connection as being incapable of futther input. 773 */ 774 case PRU_SHUTDOWN: 775 socantsendmore(so); 776 break; 777 /* 778 * Ship a packet out. The appropriate raw output 779 * routine handles any messaging necessary. 780 */ 781 case PRU_SEND: 782 { 783 struct sockaddr_in6 tmp; 784 struct sockaddr_in6 *dst; 785 786 /* always copy sockaddr to avoid overwrites */ 787 if (so->so_state & SS_ISCONNECTED) { 788 if (nam) { 789 error = EISCONN; 790 break; 791 } 792 /* XXX */ 793 bzero(&tmp, sizeof(tmp)); 794 tmp.sin6_family = AF_INET6; 795 tmp.sin6_len = sizeof(struct sockaddr_in6); 796 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 797 sizeof(struct in6_addr)); 798 dst = &tmp; 799 } else { 800 if (nam == NULL) { 801 error = ENOTCONN; 802 break; 803 } 804 if (nam->m_len != sizeof(tmp)) { 805 error = EINVAL; 806 break; 807 } 808 809 tmp = *mtod(nam, struct sockaddr_in6 *); 810 dst = &tmp; 811 812 if (dst->sin6_family != AF_INET6) { 813 error = EAFNOSUPPORT; 814 break; 815 } 816 } 817 #ifdef ENABLE_DEFAULT_SCOPE 818 if (dst->sin6_scope_id == 0) { 819 dst->sin6_scope_id = 820 scope6_addr2default(&dst->sin6_addr); 821 } 822 #endif 823 error = rip6_output(m, so, dst, control); 824 m = NULL; 825 break; 826 } 827 828 case PRU_SENSE: 829 /* 830 * stat: don't bother with a blocksize 831 */ 832 return (0); 833 /* 834 * Not supported. 835 */ 836 case PRU_RCVOOB: 837 case PRU_RCVD: 838 case PRU_LISTEN: 839 case PRU_ACCEPT: 840 case PRU_SENDOOB: 841 error = EOPNOTSUPP; 842 break; 843 844 case PRU_SOCKADDR: 845 in6_setsockaddr(in6p, nam); 846 break; 847 848 case PRU_PEERADDR: 849 in6_setpeeraddr(in6p, nam); 850 break; 851 852 default: 853 panic("rip6_usrreq"); 854 } 855 if (m != NULL) 856 m_freem(m); 857 return (error); 858 } 859
Indexes created Tue Sep 30 20:09:53 GMT 2025