raw_ip6.c revision 185088
1/*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/*- 31 * Copyright (c) 1982, 1986, 1988, 1993 32 * The Regents of the University of California. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 60 */ 61 62#include <sys/cdefs.h> 63__FBSDID("$FreeBSD: head/sys/netinet6/raw_ip6.c 185088 2008-11-19 09:39:34Z zec $"); 64 65#include "opt_ipsec.h" 66#include "opt_inet6.h" 67 68#include <sys/param.h> 69#include <sys/errno.h> 70#include <sys/lock.h> 71#include <sys/malloc.h> 72#include <sys/mbuf.h> 73#include <sys/priv.h> 74#include <sys/proc.h> 75#include <sys/protosw.h> 76#include <sys/signalvar.h> 77#include <sys/socket.h> 78#include <sys/socketvar.h> 79#include <sys/sx.h> 80#include <sys/syslog.h> 81#include <sys/vimage.h> 82 83#include <net/if.h> 84#include <net/if_types.h> 85#include <net/route.h> 86 87#include <netinet/in.h> 88#include <netinet/in_var.h> 89#include <netinet/in_systm.h> 90#include <netinet/icmp6.h> 91#include <netinet/in_pcb.h> 92#include <netinet/ip6.h> 93#include <netinet6/ip6protosw.h> 94#include <netinet6/ip6_mroute.h> 95#include <netinet6/in6_pcb.h> 96#include <netinet6/ip6_var.h> 97#include <netinet6/nd6.h> 98#include <netinet6/raw_ip6.h> 99#include <netinet6/scope6_var.h> 100 101#ifdef IPSEC 102#include <netipsec/ipsec.h> 103#include <netipsec/ipsec6.h> 104#endif /* IPSEC */ 105 106#include <machine/stdarg.h> 107 108#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 109#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 110 111/* 112 * Raw interface to IP6 protocol. 113 */ 114 115extern struct inpcbhead ripcb; 116extern struct inpcbinfo ripcbinfo; 117extern u_long rip_sendspace; 118extern u_long rip_recvspace; 119 120#ifdef VIMAGE_GLOBALS 121struct rip6stat rip6stat; 122#endif 123 124/* 125 * Hooks for multicast forwarding. 126 */ 127struct socket *ip6_mrouter = NULL; 128int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 129int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 130int (*ip6_mrouter_done)(void); 131int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 132int (*mrt6_ioctl)(int, caddr_t); 133 134/* 135 * Setup generic address and protocol structures for raw_input routine, then 136 * pass them along with mbuf chain. 137 */ 138int 139rip6_input(struct mbuf **mp, int *offp, int proto) 140{ 141 INIT_VNET_INET(curvnet); 142 INIT_VNET_INET6(curvnet); 143#ifdef IPSEC 144 INIT_VNET_IPSEC(curvnet); 145#endif 146 struct mbuf *m = *mp; 147 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 148 register struct inpcb *in6p; 149 struct inpcb *last = 0; 150 struct mbuf *opts = NULL; 151 struct sockaddr_in6 fromsa; 152 153 V_rip6stat.rip6s_ipackets++; 154 155 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 156 /* XXX Send icmp6 host/port unreach? */ 157 m_freem(m); 158 return (IPPROTO_DONE); 159 } 160 161 init_sin6(&fromsa, m); /* general init */ 162 163 INP_INFO_RLOCK(&V_ripcbinfo); 164 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 165 if ((in6p->in6p_vflag & INP_IPV6) == 0) 166 continue; 167 if (in6p->in6p_ip6_nxt && 168 in6p->in6p_ip6_nxt != proto) 169 continue; 170 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 171 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 172 continue; 173 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 174 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 175 continue; 176 INP_RLOCK(in6p); 177 if (in6p->in6p_cksum != -1) { 178 V_rip6stat.rip6s_isum++; 179 if (in6_cksum(m, proto, *offp, 180 m->m_pkthdr.len - *offp)) { 181 INP_RUNLOCK(in6p); 182 V_rip6stat.rip6s_badsum++; 183 continue; 184 } 185 } 186 if (last) { 187 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 188 189#ifdef IPSEC 190 /* 191 * Check AH/ESP integrity. 192 */ 193 if (n && ipsec6_in_reject(n, last)) { 194 m_freem(n); 195 V_ipsec6stat.in_polvio++; 196 /* Do not inject data into pcb. */ 197 } else 198#endif /* IPSEC */ 199 if (n) { 200 if (last->in6p_flags & IN6P_CONTROLOPTS || 201 last->in6p_socket->so_options & SO_TIMESTAMP) 202 ip6_savecontrol(last, n, &opts); 203 /* strip intermediate headers */ 204 m_adj(n, *offp); 205 if (sbappendaddr(&last->in6p_socket->so_rcv, 206 (struct sockaddr *)&fromsa, 207 n, opts) == 0) { 208 m_freem(n); 209 if (opts) 210 m_freem(opts); 211 V_rip6stat.rip6s_fullsock++; 212 } else 213 sorwakeup(last->in6p_socket); 214 opts = NULL; 215 } 216 INP_RUNLOCK(last); 217 } 218 last = in6p; 219 } 220 INP_INFO_RUNLOCK(&V_ripcbinfo); 221#ifdef IPSEC 222 /* 223 * Check AH/ESP integrity. 224 */ 225 if (last && ipsec6_in_reject(m, last)) { 226 m_freem(m); 227 V_ipsec6stat.in_polvio++; 228 V_ip6stat.ip6s_delivered--; 229 /* Do not inject data into pcb. */ 230 INP_RUNLOCK(last); 231 } else 232#endif /* IPSEC */ 233 if (last) { 234 if (last->in6p_flags & IN6P_CONTROLOPTS || 235 last->in6p_socket->so_options & SO_TIMESTAMP) 236 ip6_savecontrol(last, m, &opts); 237 /* Strip intermediate headers. */ 238 m_adj(m, *offp); 239 if (sbappendaddr(&last->in6p_socket->so_rcv, 240 (struct sockaddr *)&fromsa, m, opts) == 0) { 241 m_freem(m); 242 if (opts) 243 m_freem(opts); 244 V_rip6stat.rip6s_fullsock++; 245 } else 246 sorwakeup(last->in6p_socket); 247 INP_RUNLOCK(last); 248 } else { 249 V_rip6stat.rip6s_nosock++; 250 if (m->m_flags & M_MCAST) 251 V_rip6stat.rip6s_nosockmcast++; 252 if (proto == IPPROTO_NONE) 253 m_freem(m); 254 else { 255 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 256 icmp6_error(m, ICMP6_PARAM_PROB, 257 ICMP6_PARAMPROB_NEXTHEADER, 258 prvnxtp - mtod(m, char *)); 259 } 260 V_ip6stat.ip6s_delivered--; 261 } 262 return (IPPROTO_DONE); 263} 264 265void 266rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 267{ 268 INIT_VNET_INET(curvnet); 269 struct ip6_hdr *ip6; 270 struct mbuf *m; 271 int off = 0; 272 struct ip6ctlparam *ip6cp = NULL; 273 const struct sockaddr_in6 *sa6_src = NULL; 274 void *cmdarg; 275 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 276 277 if (sa->sa_family != AF_INET6 || 278 sa->sa_len != sizeof(struct sockaddr_in6)) 279 return; 280 281 if ((unsigned)cmd >= PRC_NCMDS) 282 return; 283 if (PRC_IS_REDIRECT(cmd)) 284 notify = in6_rtchange, d = NULL; 285 else if (cmd == PRC_HOSTDEAD) 286 d = NULL; 287 else if (inet6ctlerrmap[cmd] == 0) 288 return; 289 290 /* 291 * If the parameter is from icmp6, decode it. 292 */ 293 if (d != NULL) { 294 ip6cp = (struct ip6ctlparam *)d; 295 m = ip6cp->ip6c_m; 296 ip6 = ip6cp->ip6c_ip6; 297 off = ip6cp->ip6c_off; 298 cmdarg = ip6cp->ip6c_cmdarg; 299 sa6_src = ip6cp->ip6c_src; 300 } else { 301 m = NULL; 302 ip6 = NULL; 303 cmdarg = NULL; 304 sa6_src = &sa6_any; 305 } 306 307 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 308 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 309} 310 311/* 312 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 313 * may have setup with control call. 314 */ 315int 316#if __STDC__ 317rip6_output(struct mbuf *m, ...) 318#else 319rip6_output(m, va_alist) 320 struct mbuf *m; 321 va_dcl 322#endif 323{ 324 INIT_VNET_INET6(curvnet); 325 struct mbuf *control; 326 struct socket *so; 327 struct sockaddr_in6 *dstsock; 328 struct in6_addr *dst; 329 struct ip6_hdr *ip6; 330 struct inpcb *in6p; 331 u_int plen = m->m_pkthdr.len; 332 int error = 0; 333 struct ip6_pktopts opt, *optp; 334 struct ifnet *oifp = NULL; 335 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 336 int scope_ambiguous = 0; 337 struct in6_addr *in6a; 338 va_list ap; 339 340 va_start(ap, m); 341 so = va_arg(ap, struct socket *); 342 dstsock = va_arg(ap, struct sockaddr_in6 *); 343 control = va_arg(ap, struct mbuf *); 344 va_end(ap); 345 346 in6p = sotoin6pcb(so); 347 INP_WLOCK(in6p); 348 349 dst = &dstsock->sin6_addr; 350 if (control) { 351 if ((error = ip6_setpktopts(control, &opt, 352 in6p->in6p_outputopts, so->so_cred, 353 so->so_proto->pr_protocol)) != 0) { 354 goto bad; 355 } 356 optp = &opt; 357 } else 358 optp = in6p->in6p_outputopts; 359 360 /* 361 * Check and convert scope zone ID into internal form. 362 * 363 * XXX: we may still need to determine the zone later. 364 */ 365 if (!(so->so_state & SS_ISCONNECTED)) { 366 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 367 scope_ambiguous = 1; 368 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 369 goto bad; 370 } 371 372 /* 373 * For an ICMPv6 packet, we should know its type and code to update 374 * statistics. 375 */ 376 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 377 struct icmp6_hdr *icmp6; 378 if (m->m_len < sizeof(struct icmp6_hdr) && 379 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 380 error = ENOBUFS; 381 goto bad; 382 } 383 icmp6 = mtod(m, struct icmp6_hdr *); 384 type = icmp6->icmp6_type; 385 code = icmp6->icmp6_code; 386 } 387 388 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 389 if (m == NULL) { 390 error = ENOBUFS; 391 goto bad; 392 } 393 ip6 = mtod(m, struct ip6_hdr *); 394 395 /* 396 * Source address selection. 397 */ 398 if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 399 &oifp, &error)) == NULL) { 400 if (error == 0) 401 error = EADDRNOTAVAIL; 402 goto bad; 403 } 404 ip6->ip6_src = *in6a; 405 406 if (oifp && scope_ambiguous) { 407 /* 408 * Application should provide a proper zone ID or the use of 409 * default zone IDs should be enabled. Unfortunately, some 410 * applications do not behave as it should, so we need a 411 * workaround. Even if an appropriate ID is not determined 412 * (when it's required), if we can determine the outgoing 413 * interface. determine the zone ID based on the interface. 414 */ 415 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 416 if (error != 0) 417 goto bad; 418 } 419 ip6->ip6_dst = dstsock->sin6_addr; 420 421 /* 422 * Fill in the rest of the IPv6 header fields. 423 */ 424 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 425 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 426 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 427 (IPV6_VERSION & IPV6_VERSION_MASK); 428 429 /* 430 * ip6_plen will be filled in ip6_output, so not fill it here. 431 */ 432 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 433 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 434 435 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 436 in6p->in6p_cksum != -1) { 437 struct mbuf *n; 438 int off; 439 u_int16_t *p; 440 441 /* Compute checksum. */ 442 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 443 off = offsetof(struct icmp6_hdr, icmp6_cksum); 444 else 445 off = in6p->in6p_cksum; 446 if (plen < off + 1) { 447 error = EINVAL; 448 goto bad; 449 } 450 off += sizeof(struct ip6_hdr); 451 452 n = m; 453 while (n && n->m_len <= off) { 454 off -= n->m_len; 455 n = n->m_next; 456 } 457 if (!n) 458 goto bad; 459 p = (u_int16_t *)(mtod(n, caddr_t) + off); 460 *p = 0; 461 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 462 } 463 464 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 465 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 466 if (oifp) 467 icmp6_ifoutstat_inc(oifp, type, code); 468 V_icmp6stat.icp6s_outhist[type]++; 469 } else 470 V_rip6stat.rip6s_opackets++; 471 472 goto freectl; 473 474 bad: 475 if (m) 476 m_freem(m); 477 478 freectl: 479 if (control) { 480 ip6_clearpktopts(&opt, -1); 481 m_freem(control); 482 } 483 INP_WUNLOCK(in6p); 484 return (error); 485} 486 487/* 488 * Raw IPv6 socket option processing. 489 */ 490int 491rip6_ctloutput(struct socket *so, struct sockopt *sopt) 492{ 493 int error; 494 495 if (sopt->sopt_level == IPPROTO_ICMPV6) 496 /* 497 * XXX: is it better to call icmp6_ctloutput() directly 498 * from protosw? 499 */ 500 return (icmp6_ctloutput(so, sopt)); 501 else if (sopt->sopt_level != IPPROTO_IPV6) 502 return (EINVAL); 503 504 error = 0; 505 506 switch (sopt->sopt_dir) { 507 case SOPT_GET: 508 switch (sopt->sopt_name) { 509 case MRT6_INIT: 510 case MRT6_DONE: 511 case MRT6_ADD_MIF: 512 case MRT6_DEL_MIF: 513 case MRT6_ADD_MFC: 514 case MRT6_DEL_MFC: 515 case MRT6_PIM: 516 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 517 EOPNOTSUPP; 518 break; 519 case IPV6_CHECKSUM: 520 error = ip6_raw_ctloutput(so, sopt); 521 break; 522 default: 523 error = ip6_ctloutput(so, sopt); 524 break; 525 } 526 break; 527 528 case SOPT_SET: 529 switch (sopt->sopt_name) { 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 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 538 EOPNOTSUPP; 539 break; 540 case IPV6_CHECKSUM: 541 error = ip6_raw_ctloutput(so, sopt); 542 break; 543 default: 544 error = ip6_ctloutput(so, sopt); 545 break; 546 } 547 break; 548 } 549 550 return (error); 551} 552 553static int 554rip6_attach(struct socket *so, int proto, struct thread *td) 555{ 556 INIT_VNET_INET(so->so_vnet); 557 struct inpcb *inp; 558 struct icmp6_filter *filter; 559 int error; 560 561 inp = sotoinpcb(so); 562 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 563 564 error = priv_check(td, PRIV_NETINET_RAW); 565 if (error) 566 return (error); 567 error = soreserve(so, rip_sendspace, rip_recvspace); 568 if (error) 569 return (error); 570 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 571 if (filter == NULL) 572 return (ENOMEM); 573 INP_INFO_WLOCK(&V_ripcbinfo); 574 error = in_pcballoc(so, &V_ripcbinfo); 575 if (error) { 576 INP_INFO_WUNLOCK(&V_ripcbinfo); 577 free(filter, M_PCB); 578 return (error); 579 } 580 inp = (struct inpcb *)so->so_pcb; 581 INP_INFO_WUNLOCK(&V_ripcbinfo); 582 inp->inp_vflag |= INP_IPV6; 583 inp->in6p_ip6_nxt = (long)proto; 584 inp->in6p_hops = -1; /* use kernel default */ 585 inp->in6p_cksum = -1; 586 inp->in6p_icmp6filt = filter; 587 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 588 INP_WUNLOCK(inp); 589 return (0); 590} 591 592static void 593rip6_detach(struct socket *so) 594{ 595 INIT_VNET_INET(so->so_vnet); 596 struct inpcb *inp; 597 598 inp = sotoinpcb(so); 599 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 600 601 if (so == ip6_mrouter && ip6_mrouter_done) 602 ip6_mrouter_done(); 603 /* xxx: RSVP */ 604 INP_INFO_WLOCK(&V_ripcbinfo); 605 INP_WLOCK(inp); 606 free(inp->in6p_icmp6filt, M_PCB); 607 in6_pcbdetach(inp); 608 in6_pcbfree(inp); 609 INP_INFO_WUNLOCK(&V_ripcbinfo); 610} 611 612/* XXXRW: This can't ever be called. */ 613static void 614rip6_abort(struct socket *so) 615{ 616 struct inpcb *inp; 617 618 inp = sotoinpcb(so); 619 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 620 621 soisdisconnected(so); 622} 623 624static void 625rip6_close(struct socket *so) 626{ 627 struct inpcb *inp; 628 629 inp = sotoinpcb(so); 630 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 631 632 soisdisconnected(so); 633} 634 635static int 636rip6_disconnect(struct socket *so) 637{ 638 struct inpcb *inp; 639 640 inp = sotoinpcb(so); 641 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 642 643 if ((so->so_state & SS_ISCONNECTED) == 0) 644 return (ENOTCONN); 645 inp->in6p_faddr = in6addr_any; 646 rip6_abort(so); 647 return (0); 648} 649 650static int 651rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 652{ 653 INIT_VNET_NET(so->so_vnet); 654 INIT_VNET_INET(so->so_vnet); 655 INIT_VNET_INET6(so->so_vnet); 656 struct inpcb *inp; 657 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 658 struct ifaddr *ia = NULL; 659 int error = 0; 660 661 inp = sotoinpcb(so); 662 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 663 664 if (nam->sa_len != sizeof(*addr)) 665 return (EINVAL); 666 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 667 return (EADDRNOTAVAIL); 668 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 669 return (error); 670 671 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 672 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 673 return (EADDRNOTAVAIL); 674 if (ia && 675 ((struct in6_ifaddr *)ia)->ia6_flags & 676 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 677 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 678 return (EADDRNOTAVAIL); 679 } 680 INP_INFO_WLOCK(&V_ripcbinfo); 681 INP_WLOCK(inp); 682 inp->in6p_laddr = addr->sin6_addr; 683 INP_WUNLOCK(inp); 684 INP_INFO_WUNLOCK(&V_ripcbinfo); 685 return (0); 686} 687 688static int 689rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 690{ 691 INIT_VNET_NET(so->so_vnet); 692 INIT_VNET_INET(so->so_vnet); 693 INIT_VNET_INET6(so->so_vnet); 694 struct inpcb *inp; 695 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 696 struct in6_addr *in6a = NULL; 697 struct ifnet *ifp = NULL; 698 int error = 0, scope_ambiguous = 0; 699 700 inp = sotoinpcb(so); 701 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 702 703 if (nam->sa_len != sizeof(*addr)) 704 return (EINVAL); 705 if (TAILQ_EMPTY(&V_ifnet)) 706 return (EADDRNOTAVAIL); 707 if (addr->sin6_family != AF_INET6) 708 return (EAFNOSUPPORT); 709 710 /* 711 * Application should provide a proper zone ID or the use of default 712 * zone IDs should be enabled. Unfortunately, some applications do 713 * not behave as it should, so we need a workaround. Even if an 714 * appropriate ID is not determined, we'll see if we can determine 715 * the outgoing interface. If we can, determine the zone ID based on 716 * the interface below. 717 */ 718 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 719 scope_ambiguous = 1; 720 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 721 return (error); 722 723 INP_INFO_WLOCK(&V_ripcbinfo); 724 INP_WLOCK(inp); 725 /* Source address selection. XXX: need pcblookup? */ 726 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 727 inp, NULL, so->so_cred, 728 &ifp, &error); 729 if (in6a == NULL) { 730 INP_WUNLOCK(inp); 731 INP_INFO_WUNLOCK(&V_ripcbinfo); 732 return (error ? error : EADDRNOTAVAIL); 733 } 734 735 /* XXX: see above */ 736 if (ifp && scope_ambiguous && 737 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 738 INP_WUNLOCK(inp); 739 INP_INFO_WUNLOCK(&V_ripcbinfo); 740 return (error); 741 } 742 inp->in6p_faddr = addr->sin6_addr; 743 inp->in6p_laddr = *in6a; 744 soisconnected(so); 745 INP_WUNLOCK(inp); 746 INP_INFO_WUNLOCK(&V_ripcbinfo); 747 return (0); 748} 749 750static int 751rip6_shutdown(struct socket *so) 752{ 753 struct inpcb *inp; 754 755 inp = sotoinpcb(so); 756 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 757 758 INP_WLOCK(inp); 759 socantsendmore(so); 760 INP_WUNLOCK(inp); 761 return (0); 762} 763 764static int 765rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 766 struct mbuf *control, struct thread *td) 767{ 768 INIT_VNET_INET(so->so_vnet); 769 struct inpcb *inp; 770 struct sockaddr_in6 tmp; 771 struct sockaddr_in6 *dst; 772 int ret; 773 774 inp = sotoinpcb(so); 775 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 776 777 /* Always copy sockaddr to avoid overwrites. */ 778 /* Unlocked read. */ 779 if (so->so_state & SS_ISCONNECTED) { 780 if (nam) { 781 m_freem(m); 782 return (EISCONN); 783 } 784 /* XXX */ 785 bzero(&tmp, sizeof(tmp)); 786 tmp.sin6_family = AF_INET6; 787 tmp.sin6_len = sizeof(struct sockaddr_in6); 788 INP_RLOCK(inp); 789 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 790 sizeof(struct in6_addr)); 791 INP_RUNLOCK(inp); 792 dst = &tmp; 793 } else { 794 if (nam == NULL) { 795 m_freem(m); 796 return (ENOTCONN); 797 } 798 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 799 m_freem(m); 800 return (EINVAL); 801 } 802 tmp = *(struct sockaddr_in6 *)nam; 803 dst = &tmp; 804 805 if (dst->sin6_family == AF_UNSPEC) { 806 /* 807 * XXX: we allow this case for backward 808 * compatibility to buggy applications that 809 * rely on old (and wrong) kernel behavior. 810 */ 811 log(LOG_INFO, "rip6 SEND: address family is " 812 "unspec. Assume AF_INET6\n"); 813 dst->sin6_family = AF_INET6; 814 } else if (dst->sin6_family != AF_INET6) { 815 m_freem(m); 816 return(EAFNOSUPPORT); 817 } 818 } 819 ret = rip6_output(m, so, dst, control); 820 return (ret); 821} 822 823struct pr_usrreqs rip6_usrreqs = { 824 .pru_abort = rip6_abort, 825 .pru_attach = rip6_attach, 826 .pru_bind = rip6_bind, 827 .pru_connect = rip6_connect, 828 .pru_control = in6_control, 829 .pru_detach = rip6_detach, 830 .pru_disconnect = rip6_disconnect, 831 .pru_peeraddr = in6_getpeeraddr, 832 .pru_send = rip6_send, 833 .pru_shutdown = rip6_shutdown, 834 .pru_sockaddr = in6_getsockaddr, 835 .pru_close = rip6_close, 836}; 837