raw_ip6.c revision 1.29
1 /* $NetBSD: raw_ip6.c,v 1.29 2001/02/11 06:49:52 itojun Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.65 2001/02/08 18:36:17 itojun 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 97 #ifdef IPSEC 98 #include <netinet6/ipsec.h> 99 #endif /*IPSEC*/ 100 101 #include <machine/stdarg.h> 102 103 #include "faith.h" 104 105 struct in6pcb rawin6pcb; 106 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 107 108 /* 109 * Raw interface to IP6 protocol. 110 */ 111 112 /* 113 * Initialize raw connection block queue. 114 */ 115 void 116 rip6_init() 117 { 118 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 119 } 120 121 /* 122 * Setup generic address and protocol structures 123 * for raw_input routine, then pass them along with 124 * mbuf chain. 125 */ 126 int 127 rip6_input(mp, offp, proto) 128 struct mbuf **mp; 129 int *offp, proto; 130 { 131 struct mbuf *m = *mp; 132 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 133 struct in6pcb *in6p; 134 struct in6pcb *last = NULL; 135 struct sockaddr_in6 rip6src; 136 struct mbuf *opts = NULL; 137 138 #if defined(NFAITH) && 0 < NFAITH 139 if (m->m_pkthdr.rcvif) { 140 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 141 /* send icmp6 host unreach? */ 142 m_freem(m); 143 return IPPROTO_DONE; 144 } 145 } 146 #endif 147 148 /* Be proactive about malicious use of IPv4 mapped address */ 149 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 150 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 151 /* XXX stat */ 152 m_freem(m); 153 return IPPROTO_DONE; 154 } 155 156 bzero(&rip6src, sizeof(rip6src)); 157 rip6src.sin6_len = sizeof(struct sockaddr_in6); 158 rip6src.sin6_family = AF_INET6; 159 #if 0 /*XXX inbound flowlabel */ 160 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 161 #endif 162 /* KAME hack: recover scopeid */ 163 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 164 165 for (in6p = rawin6pcb.in6p_next; 166 in6p != &rawin6pcb; in6p = in6p->in6p_next) 167 { 168 if (in6p->in6p_ip6.ip6_nxt && 169 in6p->in6p_ip6.ip6_nxt != proto) 170 continue; 171 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 172 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 173 continue; 174 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 175 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 176 continue; 177 if (in6p->in6p_cksum != -1 178 && in6_cksum(m, ip6->ip6_nxt, *offp, m->m_pkthdr.len - *offp)) 179 { 180 /* XXX bark something */ 181 continue; 182 } 183 if (last) { 184 struct mbuf *n; 185 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 186 if (last->in6p_flags & IN6P_CONTROLOPTS) 187 ip6_savecontrol(last, &opts, ip6, n); 188 /* strip intermediate headers */ 189 m_adj(n, *offp); 190 if (sbappendaddr(&last->in6p_socket->so_rcv, 191 (struct sockaddr *)&rip6src, 192 n, opts) == 0) { 193 /* should notify about lost packet */ 194 m_freem(n); 195 if (opts) 196 m_freem(opts); 197 } else 198 sorwakeup(last->in6p_socket); 199 opts = NULL; 200 } 201 } 202 last = in6p; 203 } 204 if (last) { 205 if (last->in6p_flags & IN6P_CONTROLOPTS) 206 ip6_savecontrol(last, &opts, ip6, m); 207 /* strip intermediate headers */ 208 m_adj(m, *offp); 209 if (sbappendaddr(&last->in6p_socket->so_rcv, 210 (struct sockaddr *)&rip6src, m, opts) == 0) { 211 m_freem(m); 212 if (opts) 213 m_freem(opts); 214 } else 215 sorwakeup(last->in6p_socket); 216 } else { 217 if (proto == IPPROTO_NONE) 218 m_freem(m); 219 else { 220 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 221 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 222 icmp6_error(m, ICMP6_PARAM_PROB, 223 ICMP6_PARAMPROB_NEXTHEADER, 224 prvnxtp - mtod(m, char *)); 225 } 226 ip6stat.ip6s_delivered--; 227 } 228 return IPPROTO_DONE; 229 } 230 231 void 232 rip6_ctlinput(cmd, sa, d) 233 int cmd; 234 struct sockaddr *sa; 235 void *d; 236 { 237 struct ip6_hdr *ip6; 238 struct mbuf *m; 239 int off; 240 struct ip6ctlparam *ip6cp = NULL; 241 const struct sockaddr_in6 *sa6_src = NULL; 242 void *cmdarg; 243 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 244 int nxt; 245 246 if (sa->sa_family != AF_INET6 || 247 sa->sa_len != sizeof(struct sockaddr_in6)) 248 return; 249 250 if ((unsigned)cmd >= PRC_NCMDS) 251 return; 252 if (PRC_IS_REDIRECT(cmd)) 253 notify = in6_rtchange, d = NULL; 254 else if (cmd == PRC_HOSTDEAD) 255 d = NULL; 256 else if (cmd == PRC_MSGSIZE) 257 ; /* special code is present, see below */ 258 else if (inet6ctlerrmap[cmd] == 0) 259 return; 260 261 /* if the parameter is from icmp6, decode it. */ 262 if (d != NULL) { 263 ip6cp = (struct ip6ctlparam *)d; 264 m = ip6cp->ip6c_m; 265 ip6 = ip6cp->ip6c_ip6; 266 off = ip6cp->ip6c_off; 267 cmdarg = ip6cp->ip6c_cmdarg; 268 sa6_src = ip6cp->ip6c_src; 269 nxt = ip6cp->ip6c_nxt; 270 } else { 271 m = NULL; 272 ip6 = NULL; 273 cmdarg = NULL; 274 sa6_src = &sa6_any; 275 nxt = -1; 276 } 277 278 if (ip6 && cmd == PRC_MSGSIZE) { 279 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 280 int valid = 0; 281 struct in6pcb *in6p; 282 283 /* 284 * Check to see if we have a valid raw IPv6 socket 285 * corresponding to the address in the ICMPv6 message 286 * payload, and the protocol (ip6_nxt) meets the socket. 287 * XXX chase extension headers, or pass final nxt value 288 * from icmp6_notify_error() 289 */ 290 in6p = NULL; 291 in6p = in6_pcblookup_connect(&rawin6pcb, 292 &sa6->sin6_addr, 0, 293 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 294 #if 0 295 if (!in6p) { 296 /* 297 * As the use of sendto(2) is fairly popular, 298 * we may want to allow non-connected pcb too. 299 * But it could be too weak against attacks... 300 * We should at least check if the local 301 * address (= s) is really ours. 302 */ 303 in6p = in6_pcblookup_bind(&rawin6pcb, 304 &sa6->sin6_addr, 0, 0)) 305 } 306 #endif 307 308 if (in6p && in6p->in6p_ip6.ip6_nxt && 309 in6p->in6p_ip6.ip6_nxt == nxt) 310 valid++; 311 312 /* 313 * Depending on the value of "valid" and routing table 314 * size (mtudisc_{hi,lo}wat), we will: 315 * - recalcurate the new MTU and create the 316 * corresponding routing entry, or 317 * - ignore the MTU change notification. 318 */ 319 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 320 321 /* 322 * regardless of if we called icmp6_mtudisc_update(), 323 * we need to call in6_pcbnotify(), to notify path 324 * MTU change to the userland (2292bis-02), because 325 * some unconnected sockets may share the same 326 * destination and want to know the path MTU. 327 */ 328 } 329 330 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 331 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 332 } 333 334 /* 335 * Generate IPv6 header and pass packet to ip6_output. 336 * Tack on options user may have setup with control call. 337 */ 338 int 339 #if __STDC__ 340 rip6_output(struct mbuf *m, ...) 341 #else 342 rip6_output(m, va_alist) 343 struct mbuf *m; 344 va_dcl 345 #endif 346 { 347 struct socket *so; 348 struct sockaddr_in6 *dstsock; 349 struct mbuf *control; 350 struct in6_addr *dst; 351 struct ip6_hdr *ip6; 352 struct in6pcb *in6p; 353 u_int plen = m->m_pkthdr.len; 354 int error = 0; 355 struct ip6_pktopts opt, *optp = NULL, *origoptp; 356 struct ifnet *oifp = NULL; 357 int type, code; /* for ICMPv6 output statistics only */ 358 int priv = 0; 359 va_list ap; 360 int flags; 361 362 va_start(ap, m); 363 so = va_arg(ap, struct socket *); 364 dstsock = va_arg(ap, struct sockaddr_in6 *); 365 control = va_arg(ap, struct mbuf *); 366 va_end(ap); 367 368 in6p = sotoin6pcb(so); 369 370 priv = 0; 371 { 372 struct proc *p = curproc; /* XXX */ 373 374 if (p && !suser(p->p_ucred, &p->p_acflag)) 375 priv = 1; 376 } 377 dst = &dstsock->sin6_addr; 378 if (control) { 379 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 380 goto bad; 381 optp = &opt; 382 } else 383 optp = in6p->in6p_outputopts; 384 385 /* 386 * For an ICMPv6 packet, we should know its type and code 387 * to update statistics. 388 */ 389 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 390 struct icmp6_hdr *icmp6; 391 if (m->m_len < sizeof(struct icmp6_hdr) && 392 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 393 error = ENOBUFS; 394 goto bad; 395 } 396 icmp6 = mtod(m, struct icmp6_hdr *); 397 type = icmp6->icmp6_type; 398 code = icmp6->icmp6_code; 399 } 400 401 M_PREPEND(m, sizeof(*ip6), M_WAIT); 402 ip6 = mtod(m, struct ip6_hdr *); 403 404 /* 405 * Next header might not be ICMP6 but use its pseudo header anyway. 406 */ 407 ip6->ip6_dst = *dst; 408 409 /* KAME hack: embed scopeid */ 410 origoptp = in6p->in6p_outputopts; 411 in6p->in6p_outputopts = optp; 412 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 413 error = EINVAL; 414 goto bad; 415 } 416 in6p->in6p_outputopts = origoptp; 417 418 /* 419 * Source address selection. 420 */ 421 { 422 struct in6_addr *in6a; 423 424 if ((in6a = in6_selectsrc(dstsock, optp, 425 in6p->in6p_moptions, 426 &in6p->in6p_route, 427 &in6p->in6p_laddr, 428 &error)) == 0) { 429 if (error == 0) 430 error = EADDRNOTAVAIL; 431 goto bad; 432 } 433 ip6->ip6_src = *in6a; 434 if (in6p->in6p_route.ro_rt) { 435 /* what if oifp contradicts ? */ 436 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 437 } 438 } 439 440 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 441 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 442 ip6->ip6_vfc |= IPV6_VERSION; 443 #if 0 /* ip6_plen will be filled in ip6_output. */ 444 ip6->ip6_plen = htons((u_short)plen); 445 #endif 446 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 447 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 448 449 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 450 in6p->in6p_cksum != -1) { 451 struct mbuf *n; 452 int off; 453 u_int16_t *p; 454 455 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */ 456 457 /* compute checksum */ 458 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 459 off = offsetof(struct icmp6_hdr, icmp6_cksum); 460 else 461 off = in6p->in6p_cksum; 462 if (plen < off + 1) { 463 error = EINVAL; 464 goto bad; 465 } 466 off += sizeof(struct ip6_hdr); 467 468 n = m; 469 while (n && n->m_len <= off) { 470 off -= n->m_len; 471 n = n->m_next; 472 } 473 if (!n) 474 goto bad; 475 p = (u_int16_t *)(mtod(n, caddr_t) + off); 476 *p = 0; 477 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 478 } 479 480 #ifdef IPSEC 481 if (ipsec_setsocket(m, so) != 0) { 482 error = ENOBUFS; 483 goto bad; 484 } 485 #endif /*IPSEC*/ 486 487 flags = 0; 488 #ifdef IPV6_MINMTU 489 if (in6p->in6p_flags & IN6P_MINMTU) 490 flags |= IPV6_MINMTU; 491 #endif 492 493 error = ip6_output(m, optp, &in6p->in6p_route, flags, 494 in6p->in6p_moptions, &oifp); 495 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 496 if (oifp) 497 icmp6_ifoutstat_inc(oifp, type, code); 498 icmp6stat.icp6s_outhist[type]++; 499 } 500 501 goto freectl; 502 503 bad: 504 if (m) 505 m_freem(m); 506 507 freectl: 508 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 509 RTFREE(optp->ip6po_route.ro_rt); 510 if (control) 511 m_freem(control); 512 return(error); 513 } 514 515 /* 516 * Raw IPv6 socket option processing. 517 */ 518 int 519 rip6_ctloutput(op, so, level, optname, m) 520 int op; 521 struct socket *so; 522 int level, optname; 523 struct mbuf **m; 524 { 525 int error = 0; 526 527 switch (level) { 528 case IPPROTO_IPV6: 529 switch (optname) { 530 case MRT6_INIT: 531 case MRT6_DONE: 532 case MRT6_ADD_MIF: 533 case MRT6_DEL_MIF: 534 case MRT6_ADD_MFC: 535 case MRT6_DEL_MFC: 536 case MRT6_PIM: 537 if (op == PRCO_SETOPT) { 538 error = ip6_mrouter_set(optname, so, *m); 539 if (*m) 540 (void)m_free(*m); 541 } else if (op == PRCO_GETOPT) { 542 error = ip6_mrouter_get(optname, so, m); 543 } else 544 error = EINVAL; 545 return (error); 546 } 547 return (ip6_ctloutput(op, so, level, optname, m)); 548 /* NOTREACHED */ 549 550 case IPPROTO_ICMPV6: 551 /* 552 * XXX: is it better to call icmp6_ctloutput() directly 553 * from protosw? 554 */ 555 return(icmp6_ctloutput(op, so, level, optname, m)); 556 557 default: 558 if (op == PRCO_SETOPT && *m) 559 (void)m_free(*m); 560 return(EINVAL); 561 } 562 } 563 564 extern u_long rip6_sendspace; 565 extern u_long rip6_recvspace; 566 567 int 568 rip6_usrreq(so, req, m, nam, control, p) 569 struct socket *so; 570 int req; 571 struct mbuf *m, *nam, *control; 572 struct proc *p; 573 { 574 struct in6pcb *in6p = sotoin6pcb(so); 575 int s; 576 int error = 0; 577 /* extern struct socket *ip6_mrouter; */ /* xxx */ 578 int priv; 579 580 priv = 0; 581 if (p && !suser(p->p_ucred, &p->p_acflag)) 582 priv++; 583 584 if (req == PRU_CONTROL) 585 return (in6_control(so, (u_long)m, (caddr_t)nam, 586 (struct ifnet *)control, p)); 587 588 if (req == PRU_PURGEIF) { 589 in6_purgeif((struct ifnet *)control); 590 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 591 return (0); 592 } 593 594 switch (req) { 595 case PRU_ATTACH: 596 if (in6p) 597 panic("rip6_attach"); 598 if (!priv) { 599 error = EACCES; 600 break; 601 } 602 s = splsoftnet(); 603 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 604 splx(s); 605 break; 606 } 607 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 608 { 609 splx(s); 610 break; 611 } 612 splx(s); 613 in6p = sotoin6pcb(so); 614 in6p->in6p_ip6.ip6_nxt = (long)nam; 615 in6p->in6p_cksum = -1; 616 #ifdef IPSEC 617 error = ipsec_init_policy(so, &in6p->in6p_sp); 618 if (error != 0) { 619 in6_pcbdetach(in6p); 620 break; 621 } 622 #endif /*IPSEC*/ 623 624 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 625 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 626 if (in6p->in6p_icmp6filt == NULL) { 627 in6_pcbdetach(in6p); 628 error = ENOMEM; 629 break; 630 } 631 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 632 break; 633 634 case PRU_DISCONNECT: 635 if ((so->so_state & SS_ISCONNECTED) == 0) { 636 error = ENOTCONN; 637 break; 638 } 639 in6p->in6p_faddr = in6addr_any; 640 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 641 break; 642 643 case PRU_ABORT: 644 soisdisconnected(so); 645 /* Fallthrough */ 646 case PRU_DETACH: 647 if (in6p == 0) 648 panic("rip6_detach"); 649 if (so == ip6_mrouter) 650 ip6_mrouter_done(); 651 /* xxx: RSVP */ 652 if (in6p->in6p_icmp6filt) { 653 FREE(in6p->in6p_icmp6filt, M_PCB); 654 in6p->in6p_icmp6filt = NULL; 655 } 656 in6_pcbdetach(in6p); 657 break; 658 659 case PRU_BIND: 660 { 661 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 662 struct ifaddr *ia = NULL; 663 664 if (nam->m_len != sizeof(*addr)) { 665 error = EINVAL; 666 break; 667 } 668 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 669 error = EADDRNOTAVAIL; 670 break; 671 } 672 #ifdef ENABLE_DEFAULT_SCOPE 673 if (addr->sin6_scope_id == 0) /* not change if specified */ 674 addr->sin6_scope_id = 675 scope6_addr2default(&addr->sin6_addr); 676 #endif 677 /* 678 * we don't support mapped address here, it would confuse 679 * users so reject it 680 */ 681 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 682 error = EADDRNOTAVAIL; 683 break; 684 } 685 /* 686 * Currently, ifa_ifwithaddr tends to fail for a link-local 687 * address, since it implicitly expects that the link ID 688 * for the address is embedded in the sin6_addr part. 689 * For now, we'd rather keep this "as is". We'll eventually fix 690 * this in a more natural way. 691 */ 692 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 693 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 694 error = EADDRNOTAVAIL; 695 break; 696 } 697 if (ia && 698 ((struct in6_ifaddr *)ia)->ia6_flags & 699 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 700 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 701 error = EADDRNOTAVAIL; 702 break; 703 } 704 in6p->in6p_laddr = addr->sin6_addr; 705 break; 706 } 707 708 case PRU_CONNECT: 709 { 710 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 711 struct in6_addr *in6a = NULL; 712 #ifdef ENABLE_DEFAULT_SCOPE 713 struct sockaddr_in6 sin6; 714 #endif 715 716 if (nam->m_len != sizeof(*addr)) { 717 error = EINVAL; 718 break; 719 } 720 if (ifnet.tqh_first == 0) 721 { 722 error = EADDRNOTAVAIL; 723 break; 724 } 725 if (addr->sin6_family != AF_INET6) { 726 error = EAFNOSUPPORT; 727 break; 728 } 729 730 #ifdef ENABLE_DEFAULT_SCOPE 731 if (addr->sin6_scope_id == 0) { 732 /* protect *addr */ 733 sin6 = *addr; 734 addr = &sin6; 735 addr->sin6_scope_id = 736 scope6_addr2default(&addr->sin6_addr); 737 } 738 #endif 739 740 /* Source address selection. XXX: need pcblookup? */ 741 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 742 in6p->in6p_moptions, 743 &in6p->in6p_route, 744 &in6p->in6p_laddr, 745 &error); 746 if (in6a == NULL) { 747 if (error == 0) 748 error = EADDRNOTAVAIL; 749 break; 750 } 751 in6p->in6p_laddr = *in6a; 752 in6p->in6p_faddr = addr->sin6_addr; 753 soisconnected(so); 754 break; 755 } 756 757 case PRU_CONNECT2: 758 error = EOPNOTSUPP; 759 break; 760 761 /* 762 * Mark the connection as being incapable of futther input. 763 */ 764 case PRU_SHUTDOWN: 765 socantsendmore(so); 766 break; 767 /* 768 * Ship a packet out. The appropriate raw output 769 * routine handles any messaging necessary. 770 */ 771 case PRU_SEND: 772 { 773 struct sockaddr_in6 tmp; 774 struct sockaddr_in6 *dst; 775 776 /* always copy sockaddr to avoid overwrites */ 777 if (so->so_state & SS_ISCONNECTED) { 778 if (nam) { 779 error = EISCONN; 780 break; 781 } 782 /* XXX */ 783 bzero(&tmp, sizeof(tmp)); 784 tmp.sin6_family = AF_INET6; 785 tmp.sin6_len = sizeof(struct sockaddr_in6); 786 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 787 sizeof(struct in6_addr)); 788 dst = &tmp; 789 } else { 790 if (nam == NULL) { 791 error = ENOTCONN; 792 break; 793 } 794 tmp = *mtod(nam, struct sockaddr_in6 *); 795 dst = &tmp; 796 } 797 #ifdef ENABLE_DEFAULT_SCOPE 798 if (dst->sin6_scope_id == 0) { 799 dst->sin6_scope_id = 800 scope6_addr2default(&dst->sin6_addr); 801 } 802 #endif 803 error = rip6_output(m, so, dst, control); 804 m = NULL; 805 break; 806 } 807 808 case PRU_SENSE: 809 /* 810 * stat: don't bother with a blocksize 811 */ 812 return(0); 813 /* 814 * Not supported. 815 */ 816 case PRU_RCVOOB: 817 case PRU_RCVD: 818 case PRU_LISTEN: 819 case PRU_ACCEPT: 820 case PRU_SENDOOB: 821 error = EOPNOTSUPP; 822 break; 823 824 case PRU_SOCKADDR: 825 in6_setsockaddr(in6p, nam); 826 break; 827 828 case PRU_PEERADDR: 829 in6_setpeeraddr(in6p, nam); 830 break; 831 832 default: 833 panic("rip6_usrreq"); 834 } 835 if (m != NULL) 836 m_freem(m); 837 return(error); 838 } 839
Indexes created Mon Sep 22 21:09:42 GMT 2025