raw_ip6.c revision 1.38
1 /* $NetBSD: raw_ip6.c,v 1.38 2001/10/24 06:36:39 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 "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/socketvar.h> 76 #include <sys/errno.h> 77 #include <sys/systm.h> 78 #include <sys/proc.h> 79 80 #include <net/if.h> 81 #include <net/route.h> 82 #include <net/if_types.h> 83 84 #include <netinet/in.h> 85 #include <netinet/in_var.h> 86 #include <netinet/ip6.h> 87 #include <netinet6/ip6_var.h> 88 #include <netinet6/ip6_mroute.h> 89 #include <netinet/icmp6.h> 90 #include <netinet6/in6_pcb.h> 91 #include <netinet6/nd6.h> 92 #include <netinet6/ip6protosw.h> 93 #ifdef ENABLE_DEFAULT_SCOPE 94 #include <netinet6/scope6_var.h> 95 #endif 96 #include <netinet6/raw_ip6.h> 97 98 #ifdef IPSEC 99 #include <netinet6/ipsec.h> 100 #endif /* IPSEC */ 101 102 #include <machine/stdarg.h> 103 104 #include "faith.h" 105 #if defined(NFAITH) && 0 < NFAITH 106 #include <net/if_faith.h> 107 #endif 108 109 struct in6pcb rawin6pcb; 110 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 111 112 /* 113 * Raw interface to IP6 protocol. 114 */ 115 116 struct rip6stat rip6stat; 117 118 /* 119 * Initialize raw connection block queue. 120 */ 121 void 122 rip6_init() 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, 210 n, opts) == 0) { 211 /* should notify about lost packet */ 212 m_freem(n); 213 if (opts) 214 m_freem(opts); 215 rip6stat.rip6s_fullsock++; 216 } else 217 sorwakeup(last->in6p_socket); 218 opts = NULL; 219 } 220 } 221 last = in6p; 222 } 223 #ifdef IPSEC 224 /* 225 * Check AH/ESP integrity. 226 */ 227 if (last && ipsec6_in_reject(m, last)) { 228 m_freem(m); 229 ipsec6stat.in_polvio++; 230 ip6stat.ip6s_delivered--; 231 /* do not inject data into pcb */ 232 } else 233 #endif /* IPSEC */ 234 if (last) { 235 if (last->in6p_flags & IN6P_CONTROLOPTS) 236 ip6_savecontrol(last, &opts, ip6, m); 237 /* strip intermediate headers */ 238 m_adj(m, *offp); 239 if (sbappendaddr(&last->in6p_socket->so_rcv, 240 (struct sockaddr *)&rip6src, m, opts) == 0) { 241 m_freem(m); 242 if (opts) 243 m_freem(opts); 244 rip6stat.rip6s_fullsock++; 245 } else 246 sorwakeup(last->in6p_socket); 247 } else { 248 rip6stat.rip6s_nosock++; 249 if (m->m_flags & M_MCAST) 250 rip6stat.rip6s_nosockmcast++; 251 if (proto == IPPROTO_NONE) 252 m_freem(m); 253 else { 254 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 255 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 256 icmp6_error(m, ICMP6_PARAM_PROB, 257 ICMP6_PARAMPROB_NEXTHEADER, 258 prvnxtp - mtod(m, char *)); 259 } 260 ip6stat.ip6s_delivered--; 261 } 262 return IPPROTO_DONE; 263 } 264 265 void 266 rip6_ctlinput(cmd, sa, d) 267 int cmd; 268 struct sockaddr *sa; 269 void *d; 270 { 271 struct ip6_hdr *ip6; 272 struct mbuf *m; 273 int off; 274 struct ip6ctlparam *ip6cp = NULL; 275 const struct sockaddr_in6 *sa6_src = NULL; 276 void *cmdarg; 277 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 278 int nxt; 279 280 if (sa->sa_family != AF_INET6 || 281 sa->sa_len != sizeof(struct sockaddr_in6)) 282 return; 283 284 if ((unsigned)cmd >= PRC_NCMDS) 285 return; 286 if (PRC_IS_REDIRECT(cmd)) 287 notify = in6_rtchange, d = NULL; 288 else if (cmd == PRC_HOSTDEAD) 289 d = NULL; 290 else if (cmd == PRC_MSGSIZE) 291 ; /* special code is present, see below */ 292 else if (inet6ctlerrmap[cmd] == 0) 293 return; 294 295 /* if the parameter is from icmp6, decode it. */ 296 if (d != NULL) { 297 ip6cp = (struct ip6ctlparam *)d; 298 m = ip6cp->ip6c_m; 299 ip6 = ip6cp->ip6c_ip6; 300 off = ip6cp->ip6c_off; 301 cmdarg = ip6cp->ip6c_cmdarg; 302 sa6_src = ip6cp->ip6c_src; 303 nxt = ip6cp->ip6c_nxt; 304 } else { 305 m = NULL; 306 ip6 = NULL; 307 cmdarg = NULL; 308 sa6_src = &sa6_any; 309 nxt = -1; 310 } 311 312 if (ip6 && cmd == PRC_MSGSIZE) { 313 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 314 int valid = 0; 315 struct in6pcb *in6p; 316 317 /* 318 * Check to see if we have a valid raw IPv6 socket 319 * corresponding to the address in the ICMPv6 message 320 * payload, and the protocol (ip6_nxt) meets the socket. 321 * XXX chase extension headers, or pass final nxt value 322 * from icmp6_notify_error() 323 */ 324 in6p = NULL; 325 in6p = in6_pcblookup_connect(&rawin6pcb, 326 &sa6->sin6_addr, 0, 327 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 328 #if 0 329 if (!in6p) { 330 /* 331 * As the use of sendto(2) is fairly popular, 332 * we may want to allow non-connected pcb too. 333 * But it could be too weak against attacks... 334 * We should at least check if the local 335 * address (= s) is really ours. 336 */ 337 in6p = in6_pcblookup_bind(&rawin6pcb, 338 &sa6->sin6_addr, 0, 0)) 339 } 340 #endif 341 342 if (in6p && in6p->in6p_ip6.ip6_nxt && 343 in6p->in6p_ip6.ip6_nxt == nxt) 344 valid++; 345 346 /* 347 * Depending on the value of "valid" and routing table 348 * size (mtudisc_{hi,lo}wat), we will: 349 * - recalcurate the new MTU and create the 350 * corresponding routing entry, or 351 * - ignore the MTU change notification. 352 */ 353 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 354 355 /* 356 * regardless of if we called icmp6_mtudisc_update(), 357 * we need to call in6_pcbnotify(), to notify path 358 * MTU change to the userland (2292bis-02), because 359 * some unconnected sockets may share the same 360 * destination and want to know the path MTU. 361 */ 362 } 363 364 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 365 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 366 } 367 368 /* 369 * Generate IPv6 header and pass packet to ip6_output. 370 * Tack on options user may have setup with control call. 371 */ 372 int 373 #if __STDC__ 374 rip6_output(struct mbuf *m, ...) 375 #else 376 rip6_output(m, va_alist) 377 struct mbuf *m; 378 va_dcl 379 #endif 380 { 381 struct socket *so; 382 struct sockaddr_in6 *dstsock; 383 struct mbuf *control; 384 struct in6_addr *dst; 385 struct ip6_hdr *ip6; 386 struct in6pcb *in6p; 387 u_int plen = m->m_pkthdr.len; 388 int error = 0; 389 struct ip6_pktopts opt, *optp = NULL, *origoptp; 390 struct ifnet *oifp = NULL; 391 int type, code; /* for ICMPv6 output statistics only */ 392 int priv = 0; 393 va_list ap; 394 int flags; 395 396 va_start(ap, m); 397 so = va_arg(ap, struct socket *); 398 dstsock = va_arg(ap, struct sockaddr_in6 *); 399 control = va_arg(ap, struct mbuf *); 400 va_end(ap); 401 402 in6p = sotoin6pcb(so); 403 404 priv = 0; 405 { 406 struct proc *p = curproc; /* XXX */ 407 408 if (p && !suser(p->p_ucred, &p->p_acflag)) 409 priv = 1; 410 } 411 dst = &dstsock->sin6_addr; 412 if (control) { 413 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 414 goto bad; 415 optp = &opt; 416 } else 417 optp = in6p->in6p_outputopts; 418 419 /* 420 * For an ICMPv6 packet, we should know its type and code 421 * to update statistics. 422 */ 423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 424 struct icmp6_hdr *icmp6; 425 if (m->m_len < sizeof(struct icmp6_hdr) && 426 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 427 error = ENOBUFS; 428 goto bad; 429 } 430 icmp6 = mtod(m, struct icmp6_hdr *); 431 type = icmp6->icmp6_type; 432 code = icmp6->icmp6_code; 433 } 434 435 M_PREPEND(m, sizeof(*ip6), M_WAIT); 436 ip6 = mtod(m, struct ip6_hdr *); 437 438 /* 439 * Next header might not be ICMP6 but use its pseudo header anyway. 440 */ 441 ip6->ip6_dst = *dst; 442 443 /* KAME hack: embed scopeid */ 444 origoptp = in6p->in6p_outputopts; 445 in6p->in6p_outputopts = optp; 446 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 447 error = EINVAL; 448 goto bad; 449 } 450 in6p->in6p_outputopts = origoptp; 451 452 /* 453 * Source address selection. 454 */ 455 { 456 struct in6_addr *in6a; 457 458 if ((in6a = in6_selectsrc(dstsock, optp, 459 in6p->in6p_moptions, 460 &in6p->in6p_route, 461 &in6p->in6p_laddr, 462 &error)) == 0) { 463 if (error == 0) 464 error = EADDRNOTAVAIL; 465 goto bad; 466 } 467 ip6->ip6_src = *in6a; 468 if (in6p->in6p_route.ro_rt) { 469 /* what if oifp contradicts ? */ 470 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 471 } 472 } 473 474 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 475 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 476 ip6->ip6_vfc |= IPV6_VERSION; 477 #if 0 /* ip6_plen will be filled in ip6_output. */ 478 ip6->ip6_plen = htons((u_short)plen); 479 #endif 480 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 481 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 482 483 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 484 in6p->in6p_cksum != -1) { 485 int off; 486 u_int16_t sum; 487 488 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */ 489 490 /* compute checksum */ 491 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 492 off = offsetof(struct icmp6_hdr, icmp6_cksum); 493 else 494 off = in6p->in6p_cksum; 495 if (plen < off + 1) { 496 error = EINVAL; 497 goto bad; 498 } 499 off += sizeof(struct ip6_hdr); 500 501 sum = 0; 502 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 503 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 504 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 505 } 506 507 #ifdef IPSEC 508 if (ipsec_setsocket(m, so) != 0) { 509 error = ENOBUFS; 510 goto bad; 511 } 512 #endif /* IPSEC */ 513 514 flags = 0; 515 #ifdef IPV6_MINMTU 516 if (in6p->in6p_flags & IN6P_MINMTU) 517 flags |= IPV6_MINMTU; 518 #endif 519 520 error = ip6_output(m, optp, &in6p->in6p_route, flags, 521 in6p->in6p_moptions, &oifp); 522 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 523 if (oifp) 524 icmp6_ifoutstat_inc(oifp, type, code); 525 icmp6stat.icp6s_outhist[type]++; 526 } else 527 rip6stat.rip6s_opackets++; 528 529 goto freectl; 530 531 bad: 532 if (m) 533 m_freem(m); 534 535 freectl: 536 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 537 RTFREE(optp->ip6po_route.ro_rt); 538 if (control) 539 m_freem(control); 540 return(error); 541 } 542 543 /* 544 * Raw IPv6 socket option processing. 545 */ 546 int 547 rip6_ctloutput(op, so, level, optname, mp) 548 int op; 549 struct socket *so; 550 int level, optname; 551 struct mbuf **mp; 552 { 553 int error = 0; 554 int optval; 555 struct in6pcb *in6p; 556 struct mbuf *m; 557 const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum); 558 559 switch (level) { 560 case IPPROTO_IPV6: 561 switch (optname) { 562 case MRT6_INIT: 563 case MRT6_DONE: 564 case MRT6_ADD_MIF: 565 case MRT6_DEL_MIF: 566 case MRT6_ADD_MFC: 567 case MRT6_DEL_MFC: 568 case MRT6_PIM: 569 if (op == PRCO_SETOPT) { 570 error = ip6_mrouter_set(optname, so, *mp); 571 if (*mp) 572 (void)m_free(*mp); 573 } else if (op == PRCO_GETOPT) 574 error = ip6_mrouter_get(optname, so, mp); 575 else 576 error = EINVAL; 577 return (error); 578 case IPV6_CHECKSUM: 579 /* 580 * for ICMPv6 sockets, no modification allowed for 581 * checksum offset, permit "no change" values to 582 * help existing apps. 583 */ 584 in6p = sotoin6pcb(so); 585 error = 0; 586 if (op == PRCO_SETOPT) { 587 m = *mp; 588 if (m && m->m_len == sizeof(int)) { 589 optval = *mtod(m, int *); 590 if (so->so_proto->pr_protocol == 591 IPPROTO_ICMPV6) { 592 if (optval != icmp6off) 593 error = EINVAL; 594 } else 595 in6p->in6p_cksum = optval; 596 } else 597 error = EINVAL; 598 if (m) 599 m_free(m); 600 } else if (op == PRCO_GETOPT) { 601 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 602 optval = icmp6off; 603 else 604 optval = in6p->in6p_cksum; 605 *mp = m = m_get(M_WAIT, MT_SOOPTS); 606 m->m_len = sizeof(int); 607 *mtod(m, int *) = optval; 608 } else 609 error = EINVAL; 610 return error; 611 default: 612 return (ip6_ctloutput(op, so, level, optname, mp)); 613 } 614 615 case IPPROTO_ICMPV6: 616 /* 617 * XXX: is it better to call icmp6_ctloutput() directly 618 * from protosw? 619 */ 620 return(icmp6_ctloutput(op, so, level, optname, mp)); 621 622 default: 623 if (op == PRCO_SETOPT && *mp) 624 m_free(*mp); 625 return EINVAL; 626 } 627 } 628 629 extern u_long rip6_sendspace; 630 extern u_long rip6_recvspace; 631 632 int 633 rip6_usrreq(so, req, m, nam, control, p) 634 struct socket *so; 635 int req; 636 struct mbuf *m, *nam, *control; 637 struct proc *p; 638 { 639 struct in6pcb *in6p = sotoin6pcb(so); 640 int s; 641 int error = 0; 642 /* extern struct socket *ip6_mrouter; */ /* xxx */ 643 int priv; 644 645 priv = 0; 646 if (p && !suser(p->p_ucred, &p->p_acflag)) 647 priv++; 648 649 if (req == PRU_CONTROL) 650 return (in6_control(so, (u_long)m, (caddr_t)nam, 651 (struct ifnet *)control, p)); 652 653 if (req == PRU_PURGEIF) { 654 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 655 in6_purgeif((struct ifnet *)control); 656 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 657 return (0); 658 } 659 660 switch (req) { 661 case PRU_ATTACH: 662 if (in6p) 663 panic("rip6_attach"); 664 if (!priv) { 665 error = EACCES; 666 break; 667 } 668 s = splsoftnet(); 669 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 670 splx(s); 671 break; 672 } 673 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 674 { 675 splx(s); 676 break; 677 } 678 splx(s); 679 in6p = sotoin6pcb(so); 680 in6p->in6p_ip6.ip6_nxt = (long)nam; 681 in6p->in6p_cksum = -1; 682 683 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 684 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 685 if (in6p->in6p_icmp6filt == NULL) { 686 in6_pcbdetach(in6p); 687 error = ENOMEM; 688 break; 689 } 690 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 691 break; 692 693 case PRU_DISCONNECT: 694 if ((so->so_state & SS_ISCONNECTED) == 0) { 695 error = ENOTCONN; 696 break; 697 } 698 in6p->in6p_faddr = in6addr_any; 699 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 700 break; 701 702 case PRU_ABORT: 703 soisdisconnected(so); 704 /* Fallthrough */ 705 case PRU_DETACH: 706 if (in6p == 0) 707 panic("rip6_detach"); 708 if (so == ip6_mrouter) 709 ip6_mrouter_done(); 710 /* xxx: RSVP */ 711 if (in6p->in6p_icmp6filt) { 712 FREE(in6p->in6p_icmp6filt, M_PCB); 713 in6p->in6p_icmp6filt = NULL; 714 } 715 in6_pcbdetach(in6p); 716 break; 717 718 case PRU_BIND: 719 { 720 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 721 struct ifaddr *ia = NULL; 722 723 if (nam->m_len != sizeof(*addr)) { 724 error = EINVAL; 725 break; 726 } 727 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 728 error = EADDRNOTAVAIL; 729 break; 730 } 731 #ifdef ENABLE_DEFAULT_SCOPE 732 if (addr->sin6_scope_id == 0) /* not change if specified */ 733 addr->sin6_scope_id = 734 scope6_addr2default(&addr->sin6_addr); 735 #endif 736 /* KAME hack: embed scopeid */ 737 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 738 return EINVAL; 739 #ifndef SCOPEDROUTING 740 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 741 #endif 742 743 /* 744 * we don't support mapped address here, it would confuse 745 * users so reject it 746 */ 747 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 748 error = EADDRNOTAVAIL; 749 break; 750 } 751 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 752 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 753 error = EADDRNOTAVAIL; 754 break; 755 } 756 if (ia && 757 ((struct in6_ifaddr *)ia)->ia6_flags & 758 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 759 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 760 error = EADDRNOTAVAIL; 761 break; 762 } 763 in6p->in6p_laddr = addr->sin6_addr; 764 break; 765 } 766 767 case PRU_CONNECT: 768 { 769 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 770 struct in6_addr *in6a = NULL; 771 #ifdef ENABLE_DEFAULT_SCOPE 772 struct sockaddr_in6 sin6; 773 #endif 774 775 if (nam->m_len != sizeof(*addr)) { 776 error = EINVAL; 777 break; 778 } 779 if (ifnet.tqh_first == 0) 780 { 781 error = EADDRNOTAVAIL; 782 break; 783 } 784 if (addr->sin6_family != AF_INET6) { 785 error = EAFNOSUPPORT; 786 break; 787 } 788 789 #ifdef ENABLE_DEFAULT_SCOPE 790 if (addr->sin6_scope_id == 0) { 791 /* protect *addr */ 792 sin6 = *addr; 793 addr = &sin6; 794 addr->sin6_scope_id = 795 scope6_addr2default(&addr->sin6_addr); 796 } 797 #endif 798 799 /* Source address selection. XXX: need pcblookup? */ 800 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 801 in6p->in6p_moptions, 802 &in6p->in6p_route, 803 &in6p->in6p_laddr, 804 &error); 805 if (in6a == NULL) { 806 if (error == 0) 807 error = EADDRNOTAVAIL; 808 break; 809 } 810 in6p->in6p_laddr = *in6a; 811 in6p->in6p_faddr = addr->sin6_addr; 812 soisconnected(so); 813 break; 814 } 815 816 case PRU_CONNECT2: 817 error = EOPNOTSUPP; 818 break; 819 820 /* 821 * Mark the connection as being incapable of futther input. 822 */ 823 case PRU_SHUTDOWN: 824 socantsendmore(so); 825 break; 826 /* 827 * Ship a packet out. The appropriate raw output 828 * routine handles any messaging necessary. 829 */ 830 case PRU_SEND: 831 { 832 struct sockaddr_in6 tmp; 833 struct sockaddr_in6 *dst; 834 835 /* always copy sockaddr to avoid overwrites */ 836 if (so->so_state & SS_ISCONNECTED) { 837 if (nam) { 838 error = EISCONN; 839 break; 840 } 841 /* XXX */ 842 bzero(&tmp, sizeof(tmp)); 843 tmp.sin6_family = AF_INET6; 844 tmp.sin6_len = sizeof(struct sockaddr_in6); 845 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 846 sizeof(struct in6_addr)); 847 dst = &tmp; 848 } else { 849 if (nam == NULL) { 850 error = ENOTCONN; 851 break; 852 } 853 tmp = *mtod(nam, struct sockaddr_in6 *); 854 dst = &tmp; 855 } 856 #ifdef ENABLE_DEFAULT_SCOPE 857 if (dst->sin6_scope_id == 0) { 858 dst->sin6_scope_id = 859 scope6_addr2default(&dst->sin6_addr); 860 } 861 #endif 862 error = rip6_output(m, so, dst, control); 863 m = NULL; 864 break; 865 } 866 867 case PRU_SENSE: 868 /* 869 * stat: don't bother with a blocksize 870 */ 871 return(0); 872 /* 873 * Not supported. 874 */ 875 case PRU_RCVOOB: 876 case PRU_RCVD: 877 case PRU_LISTEN: 878 case PRU_ACCEPT: 879 case PRU_SENDOOB: 880 error = EOPNOTSUPP; 881 break; 882 883 case PRU_SOCKADDR: 884 in6_setsockaddr(in6p, nam); 885 break; 886 887 case PRU_PEERADDR: 888 in6_setpeeraddr(in6p, nam); 889 break; 890 891 default: 892 panic("rip6_usrreq"); 893 } 894 if (m != NULL) 895 m_freem(m); 896 return(error); 897 } 898
Indexes created Thu Sep 25 02:09:54 GMT 2025