raw_ip6.c revision 1.43
1 /* $NetBSD: raw_ip6.c,v 1.43 2002/06/07 22:03:02 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 1.43 2002/06/07 22:03:02 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 * - recalcurate 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 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */ 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 && 720 ((struct in6_ifaddr *)ia)->ia6_flags & 721 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 722 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 723 error = EADDRNOTAVAIL; 724 break; 725 } 726 in6p->in6p_laddr = addr->sin6_addr; 727 break; 728 } 729 730 case PRU_CONNECT: 731 { 732 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 733 struct in6_addr *in6a = NULL; 734 #ifdef ENABLE_DEFAULT_SCOPE 735 struct sockaddr_in6 sin6; 736 #endif 737 738 if (nam->m_len != sizeof(*addr)) { 739 error = EINVAL; 740 break; 741 } 742 if (ifnet.tqh_first == 0) 743 { 744 error = EADDRNOTAVAIL; 745 break; 746 } 747 if (addr->sin6_family != AF_INET6) { 748 error = EAFNOSUPPORT; 749 break; 750 } 751 752 #ifdef ENABLE_DEFAULT_SCOPE 753 if (addr->sin6_scope_id == 0) { 754 /* protect *addr */ 755 sin6 = *addr; 756 addr = &sin6; 757 addr->sin6_scope_id = 758 scope6_addr2default(&addr->sin6_addr); 759 } 760 #endif 761 762 /* Source address selection. XXX: need pcblookup? */ 763 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 764 in6p->in6p_moptions, &in6p->in6p_route, 765 &in6p->in6p_laddr, &error); 766 if (in6a == NULL) { 767 if (error == 0) 768 error = EADDRNOTAVAIL; 769 break; 770 } 771 in6p->in6p_laddr = *in6a; 772 in6p->in6p_faddr = addr->sin6_addr; 773 soisconnected(so); 774 break; 775 } 776 777 case PRU_CONNECT2: 778 error = EOPNOTSUPP; 779 break; 780 781 /* 782 * Mark the connection as being incapable of futther input. 783 */ 784 case PRU_SHUTDOWN: 785 socantsendmore(so); 786 break; 787 /* 788 * Ship a packet out. The appropriate raw output 789 * routine handles any messaging necessary. 790 */ 791 case PRU_SEND: 792 { 793 struct sockaddr_in6 tmp; 794 struct sockaddr_in6 *dst; 795 796 /* always copy sockaddr to avoid overwrites */ 797 if (so->so_state & SS_ISCONNECTED) { 798 if (nam) { 799 error = EISCONN; 800 break; 801 } 802 /* XXX */ 803 bzero(&tmp, sizeof(tmp)); 804 tmp.sin6_family = AF_INET6; 805 tmp.sin6_len = sizeof(struct sockaddr_in6); 806 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 807 sizeof(struct in6_addr)); 808 dst = &tmp; 809 } else { 810 if (nam == NULL) { 811 error = ENOTCONN; 812 break; 813 } 814 if (nam->m_len != sizeof(tmp)) { 815 error = EINVAL; 816 break; 817 } 818 819 tmp = *mtod(nam, struct sockaddr_in6 *); 820 dst = &tmp; 821 822 if (dst->sin6_family != AF_INET6) { 823 error = EAFNOSUPPORT; 824 break; 825 } 826 } 827 #ifdef ENABLE_DEFAULT_SCOPE 828 if (dst->sin6_scope_id == 0) { 829 dst->sin6_scope_id = 830 scope6_addr2default(&dst->sin6_addr); 831 } 832 #endif 833 error = rip6_output(m, so, dst, control); 834 m = NULL; 835 break; 836 } 837 838 case PRU_SENSE: 839 /* 840 * stat: don't bother with a blocksize 841 */ 842 return(0); 843 /* 844 * Not supported. 845 */ 846 case PRU_RCVOOB: 847 case PRU_RCVD: 848 case PRU_LISTEN: 849 case PRU_ACCEPT: 850 case PRU_SENDOOB: 851 error = EOPNOTSUPP; 852 break; 853 854 case PRU_SOCKADDR: 855 in6_setsockaddr(in6p, nam); 856 break; 857 858 case PRU_PEERADDR: 859 in6_setpeeraddr(in6p, nam); 860 break; 861 862 default: 863 panic("rip6_usrreq"); 864 } 865 if (m != NULL) 866 m_freem(m); 867 return(error); 868 } 869
Indexes created Mon Sep 22 13:09:51 GMT 2025