raw_ip6.c revision 1.60
1 /* $NetBSD: raw_ip6.c,v 1.60 2003/09/05 23:20:49 itojun Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1988, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.60 2003/09/05 23:20:49 itojun Exp $"); 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/malloc.h> 71 #include <sys/mbuf.h> 72 #include <sys/socket.h> 73 #include <sys/protosw.h> 74 #include <sys/socketvar.h> 75 #include <sys/errno.h> 76 #include <sys/systm.h> 77 #include <sys/proc.h> 78 79 #include <net/if.h> 80 #include <net/route.h> 81 #include <net/if_types.h> 82 83 #include <netinet/in.h> 84 #include <netinet/in_var.h> 85 #include <netinet/ip6.h> 86 #include <netinet6/ip6_var.h> 87 #include <netinet6/ip6_mroute.h> 88 #include <netinet/icmp6.h> 89 #include <netinet6/in6_pcb.h> 90 #include <netinet6/nd6.h> 91 #include <netinet6/ip6protosw.h> 92 #ifdef ENABLE_DEFAULT_SCOPE 93 #include <netinet6/scope6_var.h> 94 #endif 95 #include <netinet6/raw_ip6.h> 96 97 #ifdef IPSEC 98 #include <netinet6/ipsec.h> 99 #endif /* IPSEC */ 100 101 #include <machine/stdarg.h> 102 103 #include "faith.h" 104 #if defined(NFAITH) && 0 < NFAITH 105 #include <net/if_faith.h> 106 #endif 107 108 extern struct inpcbtable rawcbtable; 109 struct inpcbtable raw6cbtable; 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 { 124 125 in6_pcbinit(&raw6cbtable, 1, 1); 126 } 127 128 /* 129 * Setup generic address and protocol structures 130 * for raw_input routine, then pass them along with 131 * mbuf chain. 132 */ 133 int 134 rip6_input(mp, offp, proto) 135 struct mbuf **mp; 136 int *offp, proto; 137 { 138 struct mbuf *m = *mp; 139 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 140 struct inpcb_hdr *inph; 141 struct in6pcb *in6p; 142 struct in6pcb *last = NULL; 143 struct sockaddr_in6 rip6src; 144 struct mbuf *opts = NULL; 145 146 rip6stat.rip6s_ipackets++; 147 148 #if defined(NFAITH) && 0 < NFAITH 149 if (faithprefix(&ip6->ip6_dst)) { 150 /* send icmp6 host unreach? */ 151 m_freem(m); 152 return IPPROTO_DONE; 153 } 154 #endif 155 156 /* Be proactive about malicious use of IPv4 mapped address */ 157 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 158 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 159 /* XXX stat */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 164 bzero(&rip6src, sizeof(rip6src)); 165 rip6src.sin6_len = sizeof(struct sockaddr_in6); 166 rip6src.sin6_family = AF_INET6; 167 #if 0 /* XXX inbound flowlabel */ 168 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 169 #endif 170 /* KAME hack: recover scopeid */ 171 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 172 173 CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) { 174 in6p = (struct in6pcb *)inph; 175 if (in6p->in6p_af != AF_INET6) 176 continue; 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 u_int8_t *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, u_int8_t *)); 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(&raw6cbtable, &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(&raw6cbtable, 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(&raw6cbtable, 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_DONTWAIT); 437 if (!m) { 438 error = ENOBUFS; 439 goto bad; 440 } 441 ip6 = mtod(m, struct ip6_hdr *); 442 443 /* 444 * Next header might not be ICMP6 but use its pseudo header anyway. 445 */ 446 ip6->ip6_dst = *dst; 447 448 /* KAME hack: embed scopeid */ 449 origoptp = in6p->in6p_outputopts; 450 in6p->in6p_outputopts = optp; 451 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 452 error = EINVAL; 453 goto bad; 454 } 455 in6p->in6p_outputopts = origoptp; 456 457 /* 458 * Source address selection. 459 */ 460 { 461 struct in6_addr *in6a; 462 463 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 464 &in6p->in6p_route, &in6p->in6p_laddr, &error)) == 0) { 465 if (error == 0) 466 error = EADDRNOTAVAIL; 467 goto bad; 468 } 469 ip6->ip6_src = *in6a; 470 if (in6p->in6p_route.ro_rt) { 471 /* what if oifp contradicts ? */ 472 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 473 } 474 } 475 476 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 477 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 478 ip6->ip6_vfc |= IPV6_VERSION; 479 #if 0 /* ip6_plen will be filled in ip6_output. */ 480 ip6->ip6_plen = htons((u_int16_t)plen); 481 #endif 482 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 483 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 484 485 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 486 in6p->in6p_cksum != -1) { 487 int off; 488 u_int16_t sum; 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 flags = 0; 508 #ifdef IN6P_MINMTU 509 if (in6p->in6p_flags & IN6P_MINMTU) 510 flags |= IPV6_MINMTU; 511 #endif 512 513 error = ip6_output(m, optp, &in6p->in6p_route, flags, 514 in6p->in6p_moptions, so, &oifp); 515 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 516 if (oifp) 517 icmp6_ifoutstat_inc(oifp, type, code); 518 icmp6stat.icp6s_outhist[type]++; 519 } else 520 rip6stat.rip6s_opackets++; 521 522 goto freectl; 523 524 bad: 525 if (m) 526 m_freem(m); 527 528 freectl: 529 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 530 RTFREE(optp->ip6po_route.ro_rt); 531 if (control) 532 m_freem(control); 533 return (error); 534 } 535 536 /* 537 * Raw IPv6 socket option processing. 538 */ 539 int 540 rip6_ctloutput(op, so, level, optname, mp) 541 int op; 542 struct socket *so; 543 int level, optname; 544 struct mbuf **mp; 545 { 546 int error = 0; 547 548 switch (level) { 549 case IPPROTO_IPV6: 550 switch (optname) { 551 case MRT6_INIT: 552 case MRT6_DONE: 553 case MRT6_ADD_MIF: 554 case MRT6_DEL_MIF: 555 case MRT6_ADD_MFC: 556 case MRT6_DEL_MFC: 557 case MRT6_PIM: 558 if (op == PRCO_SETOPT) { 559 error = ip6_mrouter_set(optname, so, *mp); 560 if (*mp) 561 (void)m_free(*mp); 562 } else if (op == PRCO_GETOPT) 563 error = ip6_mrouter_get(optname, so, mp); 564 else 565 error = EINVAL; 566 return (error); 567 case IPV6_CHECKSUM: 568 return (ip6_raw_ctloutput(op, so, level, optname, mp)); 569 default: 570 return (ip6_ctloutput(op, so, level, optname, mp)); 571 } 572 573 case IPPROTO_ICMPV6: 574 /* 575 * XXX: is it better to call icmp6_ctloutput() directly 576 * from protosw? 577 */ 578 return (icmp6_ctloutput(op, so, level, optname, mp)); 579 580 default: 581 if (op == PRCO_SETOPT && *mp) 582 m_free(*mp); 583 return EINVAL; 584 } 585 } 586 587 extern u_long rip6_sendspace; 588 extern u_long rip6_recvspace; 589 590 int 591 rip6_usrreq(so, req, m, nam, control, p) 592 struct socket *so; 593 int req; 594 struct mbuf *m, *nam, *control; 595 struct proc *p; 596 { 597 struct in6pcb *in6p = sotoin6pcb(so); 598 int s; 599 int error = 0; 600 int priv; 601 602 priv = 0; 603 if (p && !suser(p->p_ucred, &p->p_acflag)) 604 priv++; 605 606 if (req == PRU_CONTROL) 607 return (in6_control(so, (u_long)m, (caddr_t)nam, 608 (struct ifnet *)control, p)); 609 610 if (req == PRU_PURGEIF) { 611 in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control); 612 in6_purgeif((struct ifnet *)control); 613 in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control); 614 return (0); 615 } 616 617 switch (req) { 618 case PRU_ATTACH: 619 if (in6p) 620 panic("rip6_attach"); 621 if (!priv) { 622 error = EACCES; 623 break; 624 } 625 s = splsoftnet(); 626 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 627 splx(s); 628 break; 629 } 630 if ((error = in6_pcballoc(so, &raw6cbtable)) != 0) 631 { 632 splx(s); 633 break; 634 } 635 splx(s); 636 in6p = sotoin6pcb(so); 637 in6p->in6p_ip6.ip6_nxt = (long)nam; 638 in6p->in6p_cksum = -1; 639 640 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 641 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 642 if (in6p->in6p_icmp6filt == NULL) { 643 in6_pcbdetach(in6p); 644 error = ENOMEM; 645 break; 646 } 647 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 648 break; 649 650 case PRU_DISCONNECT: 651 if ((so->so_state & SS_ISCONNECTED) == 0) { 652 error = ENOTCONN; 653 break; 654 } 655 in6p->in6p_faddr = in6addr_any; 656 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 657 break; 658 659 case PRU_ABORT: 660 soisdisconnected(so); 661 /* Fallthrough */ 662 case PRU_DETACH: 663 if (in6p == 0) 664 panic("rip6_detach"); 665 if (so == ip6_mrouter) 666 ip6_mrouter_done(); 667 /* xxx: RSVP */ 668 if (in6p->in6p_icmp6filt) { 669 FREE(in6p->in6p_icmp6filt, M_PCB); 670 in6p->in6p_icmp6filt = NULL; 671 } 672 in6_pcbdetach(in6p); 673 break; 674 675 case PRU_BIND: 676 { 677 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 678 struct ifaddr *ia = NULL; 679 680 if (nam->m_len != sizeof(*addr)) { 681 error = EINVAL; 682 break; 683 } 684 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 685 error = EADDRNOTAVAIL; 686 break; 687 } 688 #ifdef ENABLE_DEFAULT_SCOPE 689 if (addr->sin6_scope_id == 0) /* not change if specified */ 690 addr->sin6_scope_id = 691 scope6_addr2default(&addr->sin6_addr); 692 #endif 693 /* KAME hack: embed scopeid */ 694 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 695 return EINVAL; 696 #ifndef SCOPEDROUTING 697 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 698 #endif 699 700 /* 701 * we don't support mapped address here, it would confuse 702 * users so reject it 703 */ 704 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 705 error = EADDRNOTAVAIL; 706 break; 707 } 708 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 709 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 710 error = EADDRNOTAVAIL; 711 break; 712 } 713 if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & 714 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 715 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 716 error = EADDRNOTAVAIL; 717 break; 718 } 719 in6p->in6p_laddr = addr->sin6_addr; 720 break; 721 } 722 723 case PRU_CONNECT: 724 { 725 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 726 struct in6_addr *in6a = NULL; 727 #ifdef ENABLE_DEFAULT_SCOPE 728 struct sockaddr_in6 sin6; 729 #endif 730 731 if (nam->m_len != sizeof(*addr)) { 732 error = EINVAL; 733 break; 734 } 735 if (ifnet.tqh_first == 0) 736 { 737 error = EADDRNOTAVAIL; 738 break; 739 } 740 if (addr->sin6_family != AF_INET6) { 741 error = EAFNOSUPPORT; 742 break; 743 } 744 745 #ifdef ENABLE_DEFAULT_SCOPE 746 if (addr->sin6_scope_id == 0) { 747 /* protect *addr */ 748 sin6 = *addr; 749 addr = &sin6; 750 addr->sin6_scope_id = 751 scope6_addr2default(&addr->sin6_addr); 752 } 753 #endif 754 755 /* Source address selection. XXX: need pcblookup? */ 756 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 757 in6p->in6p_moptions, &in6p->in6p_route, 758 &in6p->in6p_laddr, &error); 759 if (in6a == NULL) { 760 if (error == 0) 761 error = EADDRNOTAVAIL; 762 break; 763 } 764 in6p->in6p_laddr = *in6a; 765 in6p->in6p_faddr = addr->sin6_addr; 766 soisconnected(so); 767 break; 768 } 769 770 case PRU_CONNECT2: 771 error = EOPNOTSUPP; 772 break; 773 774 /* 775 * Mark the connection as being incapable of futther input. 776 */ 777 case PRU_SHUTDOWN: 778 socantsendmore(so); 779 break; 780 /* 781 * Ship a packet out. The appropriate raw output 782 * routine handles any messaging necessary. 783 */ 784 case PRU_SEND: 785 { 786 struct sockaddr_in6 tmp; 787 struct sockaddr_in6 *dst; 788 789 /* always copy sockaddr to avoid overwrites */ 790 if (so->so_state & SS_ISCONNECTED) { 791 if (nam) { 792 error = EISCONN; 793 break; 794 } 795 /* XXX */ 796 bzero(&tmp, sizeof(tmp)); 797 tmp.sin6_family = AF_INET6; 798 tmp.sin6_len = sizeof(struct sockaddr_in6); 799 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 800 sizeof(struct in6_addr)); 801 dst = &tmp; 802 } else { 803 if (nam == NULL) { 804 error = ENOTCONN; 805 break; 806 } 807 if (nam->m_len != sizeof(tmp)) { 808 error = EINVAL; 809 break; 810 } 811 812 tmp = *mtod(nam, struct sockaddr_in6 *); 813 dst = &tmp; 814 815 if (dst->sin6_family != AF_INET6) { 816 error = EAFNOSUPPORT; 817 break; 818 } 819 } 820 #ifdef ENABLE_DEFAULT_SCOPE 821 if (dst->sin6_scope_id == 0) { 822 dst->sin6_scope_id = 823 scope6_addr2default(&dst->sin6_addr); 824 } 825 #endif 826 error = rip6_output(m, so, dst, control); 827 m = NULL; 828 break; 829 } 830 831 case PRU_SENSE: 832 /* 833 * stat: don't bother with a blocksize 834 */ 835 return (0); 836 /* 837 * Not supported. 838 */ 839 case PRU_RCVOOB: 840 case PRU_RCVD: 841 case PRU_LISTEN: 842 case PRU_ACCEPT: 843 case PRU_SENDOOB: 844 error = EOPNOTSUPP; 845 break; 846 847 case PRU_SOCKADDR: 848 in6_setsockaddr(in6p, nam); 849 break; 850 851 case PRU_PEERADDR: 852 in6_setpeeraddr(in6p, nam); 853 break; 854 855 default: 856 panic("rip6_usrreq"); 857 } 858 if (m != NULL) 859 m_freem(m); 860 return (error); 861 } 862
Indexes created Tue Sep 23 07:09:52 GMT 2025