raw_ip6.c revision 1.31.2.9
1 /* $NetBSD: raw_ip6.c,v 1.31.2.9 2002/06/20 03:49:31 nathanw 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 1.31.2.9 2002/06/20 03:49:31 nathanw 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/lwp.h> 82 #include <sys/proc.h> 83 84 #include <net/if.h> 85 #include <net/route.h> 86 #include <net/if_types.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/ip6_mroute.h> 93 #include <netinet/icmp6.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 #ifdef ENABLE_DEFAULT_SCOPE 98 #include <netinet6/scope6_var.h> 99 #endif 100 #include <netinet6/raw_ip6.h> 101 102 #ifdef IPSEC 103 #include <netinet6/ipsec.h> 104 #endif /* IPSEC */ 105 106 #include <machine/stdarg.h> 107 108 #include "faith.h" 109 #if defined(NFAITH) && 0 < NFAITH 110 #include <net/if_faith.h> 111 #endif 112 113 struct in6pcb rawin6pcb; 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 struct rip6stat rip6stat; 121 122 /* 123 * Initialize raw connection block queue. 124 */ 125 void 126 rip6_init() 127 { 128 129 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 130 } 131 132 /* 133 * Setup generic address and protocol structures 134 * for raw_input routine, then pass them along with 135 * mbuf chain. 136 */ 137 int 138 rip6_input(mp, offp, proto) 139 struct mbuf **mp; 140 int *offp, proto; 141 { 142 struct mbuf *m = *mp; 143 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 144 struct in6pcb *in6p; 145 struct in6pcb *last = NULL; 146 struct sockaddr_in6 rip6src; 147 struct mbuf *opts = NULL; 148 149 rip6stat.rip6s_ipackets++; 150 151 #if defined(NFAITH) && 0 < NFAITH 152 if (faithprefix(&ip6->ip6_dst)) { 153 /* send icmp6 host unreach? */ 154 m_freem(m); 155 return IPPROTO_DONE; 156 } 157 #endif 158 159 /* Be proactive about malicious use of IPv4 mapped address */ 160 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 161 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 162 /* XXX stat */ 163 m_freem(m); 164 return IPPROTO_DONE; 165 } 166 167 bzero(&rip6src, sizeof(rip6src)); 168 rip6src.sin6_len = sizeof(struct sockaddr_in6); 169 rip6src.sin6_family = AF_INET6; 170 #if 0 /* XXX inbound flowlabel */ 171 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 172 #endif 173 /* KAME hack: recover scopeid */ 174 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 175 176 for (in6p = rawin6pcb.in6p_next; 177 in6p != &rawin6pcb; in6p = in6p->in6p_next) 178 { 179 if (in6p->in6p_ip6.ip6_nxt && 180 in6p->in6p_ip6.ip6_nxt != proto) 181 continue; 182 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 183 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 184 continue; 185 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 186 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 187 continue; 188 if (in6p->in6p_cksum != -1) { 189 rip6stat.rip6s_isum++; 190 if (in6_cksum(m, ip6->ip6_nxt, *offp, 191 m->m_pkthdr.len - *offp)) { 192 rip6stat.rip6s_badsum++; 193 continue; 194 } 195 } 196 if (last) { 197 struct mbuf *n; 198 199 #ifdef IPSEC 200 /* 201 * Check AH/ESP integrity. 202 */ 203 if (ipsec6_in_reject(m, last)) { 204 ipsec6stat.in_polvio++; 205 /* do not inject data into pcb */ 206 } else 207 #endif /* IPSEC */ 208 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 209 if (last->in6p_flags & IN6P_CONTROLOPTS) 210 ip6_savecontrol(last, &opts, ip6, n); 211 /* strip intermediate headers */ 212 m_adj(n, *offp); 213 if (sbappendaddr(&last->in6p_socket->so_rcv, 214 (struct sockaddr *)&rip6src, n, opts) == 0) { 215 /* should notify about lost packet */ 216 m_freem(n); 217 if (opts) 218 m_freem(opts); 219 rip6stat.rip6s_fullsock++; 220 } else 221 sorwakeup(last->in6p_socket); 222 opts = NULL; 223 } 224 } 225 last = in6p; 226 } 227 #ifdef IPSEC 228 /* 229 * Check AH/ESP integrity. 230 */ 231 if (last && ipsec6_in_reject(m, last)) { 232 m_freem(m); 233 ipsec6stat.in_polvio++; 234 ip6stat.ip6s_delivered--; 235 /* do not inject data into pcb */ 236 } else 237 #endif /* IPSEC */ 238 if (last) { 239 if (last->in6p_flags & IN6P_CONTROLOPTS) 240 ip6_savecontrol(last, &opts, ip6, m); 241 /* strip intermediate headers */ 242 m_adj(m, *offp); 243 if (sbappendaddr(&last->in6p_socket->so_rcv, 244 (struct sockaddr *)&rip6src, m, opts) == 0) { 245 m_freem(m); 246 if (opts) 247 m_freem(opts); 248 rip6stat.rip6s_fullsock++; 249 } else 250 sorwakeup(last->in6p_socket); 251 } else { 252 rip6stat.rip6s_nosock++; 253 if (m->m_flags & M_MCAST) 254 rip6stat.rip6s_nosockmcast++; 255 if (proto == IPPROTO_NONE) 256 m_freem(m); 257 else { 258 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 259 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 260 icmp6_error(m, ICMP6_PARAM_PROB, 261 ICMP6_PARAMPROB_NEXTHEADER, 262 prvnxtp - mtod(m, char *)); 263 } 264 ip6stat.ip6s_delivered--; 265 } 266 return IPPROTO_DONE; 267 } 268 269 void 270 rip6_ctlinput(cmd, sa, d) 271 int cmd; 272 struct sockaddr *sa; 273 void *d; 274 { 275 struct ip6_hdr *ip6; 276 struct mbuf *m; 277 int off; 278 struct ip6ctlparam *ip6cp = NULL; 279 const struct sockaddr_in6 *sa6_src = NULL; 280 void *cmdarg; 281 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 282 int nxt; 283 284 if (sa->sa_family != AF_INET6 || 285 sa->sa_len != sizeof(struct sockaddr_in6)) 286 return; 287 288 if ((unsigned)cmd >= PRC_NCMDS) 289 return; 290 if (PRC_IS_REDIRECT(cmd)) 291 notify = in6_rtchange, d = NULL; 292 else if (cmd == PRC_HOSTDEAD) 293 d = NULL; 294 else if (cmd == PRC_MSGSIZE) 295 ; /* special code is present, see below */ 296 else if (inet6ctlerrmap[cmd] == 0) 297 return; 298 299 /* if the parameter is from icmp6, decode it. */ 300 if (d != NULL) { 301 ip6cp = (struct ip6ctlparam *)d; 302 m = ip6cp->ip6c_m; 303 ip6 = ip6cp->ip6c_ip6; 304 off = ip6cp->ip6c_off; 305 cmdarg = ip6cp->ip6c_cmdarg; 306 sa6_src = ip6cp->ip6c_src; 307 nxt = ip6cp->ip6c_nxt; 308 } else { 309 m = NULL; 310 ip6 = NULL; 311 cmdarg = NULL; 312 sa6_src = &sa6_any; 313 nxt = -1; 314 } 315 316 if (ip6 && cmd == PRC_MSGSIZE) { 317 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 318 int valid = 0; 319 struct in6pcb *in6p; 320 321 /* 322 * Check to see if we have a valid raw IPv6 socket 323 * corresponding to the address in the ICMPv6 message 324 * payload, and the protocol (ip6_nxt) meets the socket. 325 * XXX chase extension headers, or pass final nxt value 326 * from icmp6_notify_error() 327 */ 328 in6p = NULL; 329 in6p = in6_pcblookup_connect(&rawin6pcb, &sa6->sin6_addr, 0, 330 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 331 #if 0 332 if (!in6p) { 333 /* 334 * As the use of sendto(2) is fairly popular, 335 * we may want to allow non-connected pcb too. 336 * But it could be too weak against attacks... 337 * We should at least check if the local 338 * address (= s) is really ours. 339 */ 340 in6p = in6_pcblookup_bind(&rawin6pcb, 341 &sa6->sin6_addr, 0, 0)) 342 } 343 #endif 344 345 if (in6p && in6p->in6p_ip6.ip6_nxt && 346 in6p->in6p_ip6.ip6_nxt == nxt) 347 valid++; 348 349 /* 350 * Depending on the value of "valid" and routing table 351 * size (mtudisc_{hi,lo}wat), we will: 352 * - recalculate the new MTU and create the 353 * corresponding routing entry, or 354 * - ignore the MTU change notification. 355 */ 356 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 357 358 /* 359 * regardless of if we called icmp6_mtudisc_update(), 360 * we need to call in6_pcbnotify(), to notify path 361 * MTU change to the userland (2292bis-02), because 362 * some unconnected sockets may share the same 363 * destination and want to know the path MTU. 364 */ 365 } 366 367 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 368 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 369 } 370 371 /* 372 * Generate IPv6 header and pass packet to ip6_output. 373 * Tack on options user may have setup with control call. 374 */ 375 int 376 #if __STDC__ 377 rip6_output(struct mbuf *m, ...) 378 #else 379 rip6_output(m, va_alist) 380 struct mbuf *m; 381 va_dcl 382 #endif 383 { 384 struct socket *so; 385 struct sockaddr_in6 *dstsock; 386 struct mbuf *control; 387 struct in6_addr *dst; 388 struct ip6_hdr *ip6; 389 struct in6pcb *in6p; 390 u_int plen = m->m_pkthdr.len; 391 int error = 0; 392 struct ip6_pktopts opt, *optp = NULL, *origoptp; 393 struct ifnet *oifp = NULL; 394 int type, code; /* for ICMPv6 output statistics only */ 395 int priv = 0; 396 va_list ap; 397 int flags; 398 399 va_start(ap, m); 400 so = va_arg(ap, struct socket *); 401 dstsock = va_arg(ap, struct sockaddr_in6 *); 402 control = va_arg(ap, struct mbuf *); 403 va_end(ap); 404 405 in6p = sotoin6pcb(so); 406 407 priv = 0; 408 { 409 struct proc *p = (curproc ? curproc->l_proc : 0); /* XXX */ 410 411 if (p && !suser(p->p_ucred, &p->p_acflag)) 412 priv = 1; 413 } 414 dst = &dstsock->sin6_addr; 415 if (control) { 416 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 417 goto bad; 418 optp = &opt; 419 } else 420 optp = in6p->in6p_outputopts; 421 422 /* 423 * For an ICMPv6 packet, we should know its type and code 424 * to update statistics. 425 */ 426 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 427 struct icmp6_hdr *icmp6; 428 if (m->m_len < sizeof(struct icmp6_hdr) && 429 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 430 error = ENOBUFS; 431 goto bad; 432 } 433 icmp6 = mtod(m, struct icmp6_hdr *); 434 type = icmp6->icmp6_type; 435 code = icmp6->icmp6_code; 436 } 437 438 M_PREPEND(m, sizeof(*ip6), M_WAIT); 439 ip6 = mtod(m, struct ip6_hdr *); 440 441 /* 442 * Next header might not be ICMP6 but use its pseudo header anyway. 443 */ 444 ip6->ip6_dst = *dst; 445 446 /* KAME hack: embed scopeid */ 447 origoptp = in6p->in6p_outputopts; 448 in6p->in6p_outputopts = optp; 449 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 450 error = EINVAL; 451 goto bad; 452 } 453 in6p->in6p_outputopts = origoptp; 454 455 /* 456 * Source address selection. 457 */ 458 { 459 struct in6_addr *in6a; 460 461 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 462 &in6p->in6p_route, &in6p->in6p_laddr, &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 /* compute checksum */ 489 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 490 off = offsetof(struct icmp6_hdr, icmp6_cksum); 491 else 492 off = in6p->in6p_cksum; 493 if (plen < off + 1) { 494 error = EINVAL; 495 goto bad; 496 } 497 off += sizeof(struct ip6_hdr); 498 499 sum = 0; 500 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 501 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 502 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 503 } 504 505 #ifdef IPSEC 506 if (ipsec_setsocket(m, so) != 0) { 507 error = ENOBUFS; 508 goto bad; 509 } 510 #endif /* IPSEC */ 511 512 flags = 0; 513 #ifdef IN6P_MINMTU 514 if (in6p->in6p_flags & IN6P_MINMTU) 515 flags |= IPV6_MINMTU; 516 #endif 517 518 error = ip6_output(m, optp, &in6p->in6p_route, flags, 519 in6p->in6p_moptions, &oifp); 520 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 521 if (oifp) 522 icmp6_ifoutstat_inc(oifp, type, code); 523 icmp6stat.icp6s_outhist[type]++; 524 } else 525 rip6stat.rip6s_opackets++; 526 527 goto freectl; 528 529 bad: 530 if (m) 531 m_freem(m); 532 533 freectl: 534 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 535 RTFREE(optp->ip6po_route.ro_rt); 536 if (control) 537 m_freem(control); 538 return(error); 539 } 540 541 /* 542 * Raw IPv6 socket option processing. 543 */ 544 int 545 rip6_ctloutput(op, so, level, optname, mp) 546 int op; 547 struct socket *so; 548 int level, optname; 549 struct mbuf **mp; 550 { 551 int error = 0; 552 553 switch (level) { 554 case IPPROTO_IPV6: 555 switch (optname) { 556 case MRT6_INIT: 557 case MRT6_DONE: 558 case MRT6_ADD_MIF: 559 case MRT6_DEL_MIF: 560 case MRT6_ADD_MFC: 561 case MRT6_DEL_MFC: 562 case MRT6_PIM: 563 if (op == PRCO_SETOPT) { 564 error = ip6_mrouter_set(optname, so, *mp); 565 if (*mp) 566 (void)m_free(*mp); 567 } else if (op == PRCO_GETOPT) 568 error = ip6_mrouter_get(optname, so, mp); 569 else 570 error = EINVAL; 571 return (error); 572 case IPV6_CHECKSUM: 573 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 574 default: 575 return (ip6_ctloutput(op, so, level, optname, mp)); 576 } 577 578 case IPPROTO_ICMPV6: 579 /* 580 * XXX: is it better to call icmp6_ctloutput() directly 581 * from protosw? 582 */ 583 return (icmp6_ctloutput(op, so, level, optname, mp)); 584 585 default: 586 if (op == PRCO_SETOPT && *mp) 587 m_free(*mp); 588 return EINVAL; 589 } 590 } 591 592 extern u_long rip6_sendspace; 593 extern u_long rip6_recvspace; 594 595 int 596 rip6_usrreq(so, req, m, nam, control, p) 597 struct socket *so; 598 int req; 599 struct mbuf *m, *nam, *control; 600 struct proc *p; 601 { 602 struct in6pcb *in6p = sotoin6pcb(so); 603 int s; 604 int error = 0; 605 /* extern struct socket *ip6_mrouter; */ /* xxx */ 606 int priv; 607 608 priv = 0; 609 if (p && !suser(p->p_ucred, &p->p_acflag)) 610 priv++; 611 612 if (req == PRU_CONTROL) 613 return (in6_control(so, (u_long)m, (caddr_t)nam, 614 (struct ifnet *)control, p)); 615 616 if (req == PRU_PURGEIF) { 617 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 618 in6_purgeif((struct ifnet *)control); 619 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 620 return (0); 621 } 622 623 switch (req) { 624 case PRU_ATTACH: 625 if (in6p) 626 panic("rip6_attach"); 627 if (!priv) { 628 error = EACCES; 629 break; 630 } 631 s = splsoftnet(); 632 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 633 splx(s); 634 break; 635 } 636 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 637 { 638 splx(s); 639 break; 640 } 641 splx(s); 642 in6p = sotoin6pcb(so); 643 in6p->in6p_ip6.ip6_nxt = (long)nam; 644 in6p->in6p_cksum = -1; 645 646 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 647 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 648 if (in6p->in6p_icmp6filt == NULL) { 649 in6_pcbdetach(in6p); 650 error = ENOMEM; 651 break; 652 } 653 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 654 break; 655 656 case PRU_DISCONNECT: 657 if ((so->so_state & SS_ISCONNECTED) == 0) { 658 error = ENOTCONN; 659 break; 660 } 661 in6p->in6p_faddr = in6addr_any; 662 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 663 break; 664 665 case PRU_ABORT: 666 soisdisconnected(so); 667 /* Fallthrough */ 668 case PRU_DETACH: 669 if (in6p == 0) 670 panic("rip6_detach"); 671 if (so == ip6_mrouter) 672 ip6_mrouter_done(); 673 /* xxx: RSVP */ 674 if (in6p->in6p_icmp6filt) { 675 FREE(in6p->in6p_icmp6filt, M_PCB); 676 in6p->in6p_icmp6filt = NULL; 677 } 678 in6_pcbdetach(in6p); 679 break; 680 681 case PRU_BIND: 682 { 683 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 684 struct ifaddr *ia = NULL; 685 686 if (nam->m_len != sizeof(*addr)) { 687 error = EINVAL; 688 break; 689 } 690 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 691 error = EADDRNOTAVAIL; 692 break; 693 } 694 #ifdef ENABLE_DEFAULT_SCOPE 695 if (addr->sin6_scope_id == 0) /* not change if specified */ 696 addr->sin6_scope_id = 697 scope6_addr2default(&addr->sin6_addr); 698 #endif 699 /* KAME hack: embed scopeid */ 700 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 701 return EINVAL; 702 #ifndef SCOPEDROUTING 703 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 704 #endif 705 706 /* 707 * we don't support mapped address here, it would confuse 708 * users so reject it 709 */ 710 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 711 error = EADDRNOTAVAIL; 712 break; 713 } 714 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 715 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 716 error = EADDRNOTAVAIL; 717 break; 718 } 719 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 720 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 721 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 722 error = EADDRNOTAVAIL; 723 break; 724 } 725 in6p->in6p_laddr = addr->sin6_addr; 726 break; 727 } 728 729 case PRU_CONNECT: 730 { 731 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 732 struct in6_addr *in6a = NULL; 733 #ifdef ENABLE_DEFAULT_SCOPE 734 struct sockaddr_in6 sin6; 735 #endif 736 737 if (nam->m_len != sizeof(*addr)) { 738 error = EINVAL; 739 break; 740 } 741 if (ifnet.tqh_first == 0) 742 { 743 error = EADDRNOTAVAIL; 744 break; 745 } 746 if (addr->sin6_family != AF_INET6) { 747 error = EAFNOSUPPORT; 748 break; 749 } 750 751 #ifdef ENABLE_DEFAULT_SCOPE 752 if (addr->sin6_scope_id == 0) { 753 /* protect *addr */ 754 sin6 = *addr; 755 addr = &sin6; 756 addr->sin6_scope_id = 757 scope6_addr2default(&addr->sin6_addr); 758 } 759 #endif 760 761 /* Source address selection. XXX: need pcblookup? */ 762 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 763 in6p->in6p_moptions, &in6p->in6p_route, 764 &in6p->in6p_laddr, &error); 765 if (in6a == NULL) { 766 if (error == 0) 767 error = EADDRNOTAVAIL; 768 break; 769 } 770 in6p->in6p_laddr = *in6a; 771 in6p->in6p_faddr = addr->sin6_addr; 772 soisconnected(so); 773 break; 774 } 775 776 case PRU_CONNECT2: 777 error = EOPNOTSUPP; 778 break; 779 780 /* 781 * Mark the connection as being incapable of futther input. 782 */ 783 case PRU_SHUTDOWN: 784 socantsendmore(so); 785 break; 786 /* 787 * Ship a packet out. The appropriate raw output 788 * routine handles any messaging necessary. 789 */ 790 case PRU_SEND: 791 { 792 struct sockaddr_in6 tmp; 793 struct sockaddr_in6 *dst; 794 795 /* always copy sockaddr to avoid overwrites */ 796 if (so->so_state & SS_ISCONNECTED) { 797 if (nam) { 798 error = EISCONN; 799 break; 800 } 801 /* XXX */ 802 bzero(&tmp, sizeof(tmp)); 803 tmp.sin6_family = AF_INET6; 804 tmp.sin6_len = sizeof(struct sockaddr_in6); 805 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 806 sizeof(struct in6_addr)); 807 dst = &tmp; 808 } else { 809 if (nam == NULL) { 810 error = ENOTCONN; 811 break; 812 } 813 if (nam->m_len != sizeof(tmp)) { 814 error = EINVAL; 815 break; 816 } 817 818 tmp = *mtod(nam, struct sockaddr_in6 *); 819 dst = &tmp; 820 821 if (dst->sin6_family != AF_INET6) { 822 error = EAFNOSUPPORT; 823 break; 824 } 825 } 826 #ifdef ENABLE_DEFAULT_SCOPE 827 if (dst->sin6_scope_id == 0) { 828 dst->sin6_scope_id = 829 scope6_addr2default(&dst->sin6_addr); 830 } 831 #endif 832 error = rip6_output(m, so, dst, control); 833 m = NULL; 834 break; 835 } 836 837 case PRU_SENSE: 838 /* 839 * stat: don't bother with a blocksize 840 */ 841 return(0); 842 /* 843 * Not supported. 844 */ 845 case PRU_RCVOOB: 846 case PRU_RCVD: 847 case PRU_LISTEN: 848 case PRU_ACCEPT: 849 case PRU_SENDOOB: 850 error = EOPNOTSUPP; 851 break; 852 853 case PRU_SOCKADDR: 854 in6_setsockaddr(in6p, nam); 855 break; 856 857 case PRU_PEERADDR: 858 in6_setpeeraddr(in6p, nam); 859 break; 860 861 default: 862 panic("rip6_usrreq"); 863 } 864 if (m != NULL) 865 m_freem(m); 866 return(error); 867 } 868
Indexes created Tue Sep 30 20:09:53 GMT 2025