raw_ip6.c revision 1.46
1 /* $NetBSD: raw_ip6.c,v 1.46 2002/06/07 22:07:38 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 1.46 2002/06/07 22:07:38 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 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 128 } 129 130 /* 131 * Setup generic address and protocol structures 132 * for raw_input routine, then pass them along with 133 * mbuf chain. 134 */ 135 int 136 rip6_input(mp, offp, proto) 137 struct mbuf **mp; 138 int *offp, proto; 139 { 140 struct mbuf *m = *mp; 141 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 142 struct in6pcb *in6p; 143 struct in6pcb *last = NULL; 144 struct sockaddr_in6 rip6src; 145 struct mbuf *opts = NULL; 146 147 rip6stat.rip6s_ipackets++; 148 149 #if defined(NFAITH) && 0 < NFAITH 150 if (faithprefix(&ip6->ip6_dst)) { 151 /* send icmp6 host unreach? */ 152 m_freem(m); 153 return IPPROTO_DONE; 154 } 155 #endif 156 157 /* Be proactive about malicious use of IPv4 mapped address */ 158 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 159 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 160 /* XXX stat */ 161 m_freem(m); 162 return IPPROTO_DONE; 163 } 164 165 bzero(&rip6src, sizeof(rip6src)); 166 rip6src.sin6_len = sizeof(struct sockaddr_in6); 167 rip6src.sin6_family = AF_INET6; 168 #if 0 /* XXX inbound flowlabel */ 169 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 170 #endif 171 /* KAME hack: recover scopeid */ 172 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 173 174 for (in6p = rawin6pcb.in6p_next; 175 in6p != &rawin6pcb; in6p = in6p->in6p_next) 176 { 177 if (in6p->in6p_ip6.ip6_nxt && 178 in6p->in6p_ip6.ip6_nxt != proto) 179 continue; 180 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 181 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 182 continue; 183 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 184 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 185 continue; 186 if (in6p->in6p_cksum != -1) { 187 rip6stat.rip6s_isum++; 188 if (in6_cksum(m, ip6->ip6_nxt, *offp, 189 m->m_pkthdr.len - *offp)) { 190 rip6stat.rip6s_badsum++; 191 continue; 192 } 193 } 194 if (last) { 195 struct mbuf *n; 196 197 #ifdef IPSEC 198 /* 199 * Check AH/ESP integrity. 200 */ 201 if (ipsec6_in_reject(m, last)) { 202 ipsec6stat.in_polvio++; 203 /* do not inject data into pcb */ 204 } else 205 #endif /* IPSEC */ 206 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 207 if (last->in6p_flags & IN6P_CONTROLOPTS) 208 ip6_savecontrol(last, &opts, ip6, n); 209 /* strip intermediate headers */ 210 m_adj(n, *offp); 211 if (sbappendaddr(&last->in6p_socket->so_rcv, 212 (struct sockaddr *)&rip6src, n, opts) == 0) { 213 /* should notify about lost packet */ 214 m_freem(n); 215 if (opts) 216 m_freem(opts); 217 rip6stat.rip6s_fullsock++; 218 } else 219 sorwakeup(last->in6p_socket); 220 opts = NULL; 221 } 222 } 223 last = in6p; 224 } 225 #ifdef IPSEC 226 /* 227 * Check AH/ESP integrity. 228 */ 229 if (last && ipsec6_in_reject(m, last)) { 230 m_freem(m); 231 ipsec6stat.in_polvio++; 232 ip6stat.ip6s_delivered--; 233 /* do not inject data into pcb */ 234 } else 235 #endif /* IPSEC */ 236 if (last) { 237 if (last->in6p_flags & IN6P_CONTROLOPTS) 238 ip6_savecontrol(last, &opts, ip6, m); 239 /* strip intermediate headers */ 240 m_adj(m, *offp); 241 if (sbappendaddr(&last->in6p_socket->so_rcv, 242 (struct sockaddr *)&rip6src, m, opts) == 0) { 243 m_freem(m); 244 if (opts) 245 m_freem(opts); 246 rip6stat.rip6s_fullsock++; 247 } else 248 sorwakeup(last->in6p_socket); 249 } else { 250 rip6stat.rip6s_nosock++; 251 if (m->m_flags & M_MCAST) 252 rip6stat.rip6s_nosockmcast++; 253 if (proto == IPPROTO_NONE) 254 m_freem(m); 255 else { 256 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 257 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 258 icmp6_error(m, ICMP6_PARAM_PROB, 259 ICMP6_PARAMPROB_NEXTHEADER, 260 prvnxtp - mtod(m, char *)); 261 } 262 ip6stat.ip6s_delivered--; 263 } 264 return IPPROTO_DONE; 265 } 266 267 void 268 rip6_ctlinput(cmd, sa, d) 269 int cmd; 270 struct sockaddr *sa; 271 void *d; 272 { 273 struct ip6_hdr *ip6; 274 struct mbuf *m; 275 int off; 276 struct ip6ctlparam *ip6cp = NULL; 277 const struct sockaddr_in6 *sa6_src = NULL; 278 void *cmdarg; 279 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 280 int nxt; 281 282 if (sa->sa_family != AF_INET6 || 283 sa->sa_len != sizeof(struct sockaddr_in6)) 284 return; 285 286 if ((unsigned)cmd >= PRC_NCMDS) 287 return; 288 if (PRC_IS_REDIRECT(cmd)) 289 notify = in6_rtchange, d = NULL; 290 else if (cmd == PRC_HOSTDEAD) 291 d = NULL; 292 else if (cmd == PRC_MSGSIZE) 293 ; /* special code is present, see below */ 294 else if (inet6ctlerrmap[cmd] == 0) 295 return; 296 297 /* if the parameter is from icmp6, decode it. */ 298 if (d != NULL) { 299 ip6cp = (struct ip6ctlparam *)d; 300 m = ip6cp->ip6c_m; 301 ip6 = ip6cp->ip6c_ip6; 302 off = ip6cp->ip6c_off; 303 cmdarg = ip6cp->ip6c_cmdarg; 304 sa6_src = ip6cp->ip6c_src; 305 nxt = ip6cp->ip6c_nxt; 306 } else { 307 m = NULL; 308 ip6 = NULL; 309 cmdarg = NULL; 310 sa6_src = &sa6_any; 311 nxt = -1; 312 } 313 314 if (ip6 && cmd == PRC_MSGSIZE) { 315 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 316 int valid = 0; 317 struct in6pcb *in6p; 318 319 /* 320 * Check to see if we have a valid raw IPv6 socket 321 * corresponding to the address in the ICMPv6 message 322 * payload, and the protocol (ip6_nxt) meets the socket. 323 * XXX chase extension headers, or pass final nxt value 324 * from icmp6_notify_error() 325 */ 326 in6p = NULL; 327 in6p = in6_pcblookup_connect(&rawin6pcb, &sa6->sin6_addr, 0, 328 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 329 #if 0 330 if (!in6p) { 331 /* 332 * As the use of sendto(2) is fairly popular, 333 * we may want to allow non-connected pcb too. 334 * But it could be too weak against attacks... 335 * We should at least check if the local 336 * address (= s) is really ours. 337 */ 338 in6p = in6_pcblookup_bind(&rawin6pcb, 339 &sa6->sin6_addr, 0, 0)) 340 } 341 #endif 342 343 if (in6p && in6p->in6p_ip6.ip6_nxt && 344 in6p->in6p_ip6.ip6_nxt == nxt) 345 valid++; 346 347 /* 348 * Depending on the value of "valid" and routing table 349 * size (mtudisc_{hi,lo}wat), we will: 350 * - recalculate the new MTU and create the 351 * corresponding routing entry, or 352 * - ignore the MTU change notification. 353 */ 354 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 355 356 /* 357 * regardless of if we called icmp6_mtudisc_update(), 358 * we need to call in6_pcbnotify(), to notify path 359 * MTU change to the userland (2292bis-02), because 360 * some unconnected sockets may share the same 361 * destination and want to know the path MTU. 362 */ 363 } 364 365 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 366 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 367 } 368 369 /* 370 * Generate IPv6 header and pass packet to ip6_output. 371 * Tack on options user may have setup with control call. 372 */ 373 int 374 #if __STDC__ 375 rip6_output(struct mbuf *m, ...) 376 #else 377 rip6_output(m, va_alist) 378 struct mbuf *m; 379 va_dcl 380 #endif 381 { 382 struct socket *so; 383 struct sockaddr_in6 *dstsock; 384 struct mbuf *control; 385 struct in6_addr *dst; 386 struct ip6_hdr *ip6; 387 struct in6pcb *in6p; 388 u_int plen = m->m_pkthdr.len; 389 int error = 0; 390 struct ip6_pktopts opt, *optp = NULL, *origoptp; 391 struct ifnet *oifp = NULL; 392 int type, code; /* for ICMPv6 output statistics only */ 393 int priv = 0; 394 va_list ap; 395 int flags; 396 397 va_start(ap, m); 398 so = va_arg(ap, struct socket *); 399 dstsock = va_arg(ap, struct sockaddr_in6 *); 400 control = va_arg(ap, struct mbuf *); 401 va_end(ap); 402 403 in6p = sotoin6pcb(so); 404 405 priv = 0; 406 { 407 struct proc *p = curproc; /* XXX */ 408 409 if (p && !suser(p->p_ucred, &p->p_acflag)) 410 priv = 1; 411 } 412 dst = &dstsock->sin6_addr; 413 if (control) { 414 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 415 goto bad; 416 optp = &opt; 417 } else 418 optp = in6p->in6p_outputopts; 419 420 /* 421 * For an ICMPv6 packet, we should know its type and code 422 * to update statistics. 423 */ 424 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 425 struct icmp6_hdr *icmp6; 426 if (m->m_len < sizeof(struct icmp6_hdr) && 427 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 428 error = ENOBUFS; 429 goto bad; 430 } 431 icmp6 = mtod(m, struct icmp6_hdr *); 432 type = icmp6->icmp6_type; 433 code = icmp6->icmp6_code; 434 } 435 436 M_PREPEND(m, sizeof(*ip6), M_WAIT); 437 ip6 = mtod(m, struct ip6_hdr *); 438 439 /* 440 * Next header might not be ICMP6 but use its pseudo header anyway. 441 */ 442 ip6->ip6_dst = *dst; 443 444 /* KAME hack: embed scopeid */ 445 origoptp = in6p->in6p_outputopts; 446 in6p->in6p_outputopts = optp; 447 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 448 error = EINVAL; 449 goto bad; 450 } 451 in6p->in6p_outputopts = origoptp; 452 453 /* 454 * Source address selection. 455 */ 456 { 457 struct in6_addr *in6a; 458 459 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 460 &in6p->in6p_route, &in6p->in6p_laddr, &error)) == 0) { 461 if (error == 0) 462 error = EADDRNOTAVAIL; 463 goto bad; 464 } 465 ip6->ip6_src = *in6a; 466 if (in6p->in6p_route.ro_rt) { 467 /* what if oifp contradicts ? */ 468 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 469 } 470 } 471 472 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 473 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 474 ip6->ip6_vfc |= IPV6_VERSION; 475 #if 0 /* ip6_plen will be filled in ip6_output. */ 476 ip6->ip6_plen = htons((u_short)plen); 477 #endif 478 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 479 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 480 481 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 482 in6p->in6p_cksum != -1) { 483 int off; 484 u_int16_t sum; 485 486 /* compute checksum */ 487 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 488 off = offsetof(struct icmp6_hdr, icmp6_cksum); 489 else 490 off = in6p->in6p_cksum; 491 if (plen < off + 1) { 492 error = EINVAL; 493 goto bad; 494 } 495 off += sizeof(struct ip6_hdr); 496 497 sum = 0; 498 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 499 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 500 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 501 } 502 503 #ifdef IPSEC 504 if (ipsec_setsocket(m, so) != 0) { 505 error = ENOBUFS; 506 goto bad; 507 } 508 #endif /* IPSEC */ 509 510 flags = 0; 511 #ifdef IN6P_MINMTU 512 if (in6p->in6p_flags & IN6P_MINMTU) 513 flags |= IPV6_MINMTU; 514 #endif 515 516 error = ip6_output(m, optp, &in6p->in6p_route, flags, 517 in6p->in6p_moptions, &oifp); 518 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 519 if (oifp) 520 icmp6_ifoutstat_inc(oifp, type, code); 521 icmp6stat.icp6s_outhist[type]++; 522 } else 523 rip6stat.rip6s_opackets++; 524 525 goto freectl; 526 527 bad: 528 if (m) 529 m_freem(m); 530 531 freectl: 532 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 533 RTFREE(optp->ip6po_route.ro_rt); 534 if (control) 535 m_freem(control); 536 return(error); 537 } 538 539 /* 540 * Raw IPv6 socket option processing. 541 */ 542 int 543 rip6_ctloutput(op, so, level, optname, mp) 544 int op; 545 struct socket *so; 546 int level, optname; 547 struct mbuf **mp; 548 { 549 int error = 0; 550 551 switch (level) { 552 case IPPROTO_IPV6: 553 switch (optname) { 554 case MRT6_INIT: 555 case MRT6_DONE: 556 case MRT6_ADD_MIF: 557 case MRT6_DEL_MIF: 558 case MRT6_ADD_MFC: 559 case MRT6_DEL_MFC: 560 case MRT6_PIM: 561 if (op == PRCO_SETOPT) { 562 error = ip6_mrouter_set(optname, so, *mp); 563 if (*mp) 564 (void)m_free(*mp); 565 } else if (op == PRCO_GETOPT) 566 error = ip6_mrouter_get(optname, so, mp); 567 else 568 error = EINVAL; 569 return (error); 570 case IPV6_CHECKSUM: 571 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 572 default: 573 return (ip6_ctloutput(op, so, level, optname, mp)); 574 } 575 576 case IPPROTO_ICMPV6: 577 /* 578 * XXX: is it better to call icmp6_ctloutput() directly 579 * from protosw? 580 */ 581 return (icmp6_ctloutput(op, so, level, optname, mp)); 582 583 default: 584 if (op == PRCO_SETOPT && *mp) 585 m_free(*mp); 586 return EINVAL; 587 } 588 } 589 590 extern u_long rip6_sendspace; 591 extern u_long rip6_recvspace; 592 593 int 594 rip6_usrreq(so, req, m, nam, control, p) 595 struct socket *so; 596 int req; 597 struct mbuf *m, *nam, *control; 598 struct proc *p; 599 { 600 struct in6pcb *in6p = sotoin6pcb(so); 601 int s; 602 int error = 0; 603 /* extern struct socket *ip6_mrouter; */ /* xxx */ 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
Indexes created Tue Sep 23 13:09:54 GMT 2025