raw_ip6.c revision 169462
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 * $FreeBSD: head/sys/netinet6/raw_ip6.c 169462 2007-05-11 10:20:51Z rwatson $ 30 */ 31 32/*- 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 61 */ 62 63#include "opt_ipsec.h" 64#include "opt_inet6.h" 65 66#include <sys/param.h> 67#include <sys/errno.h> 68#include <sys/lock.h> 69#include <sys/malloc.h> 70#include <sys/mbuf.h> 71#include <sys/proc.h> 72#include <sys/protosw.h> 73#include <sys/signalvar.h> 74#include <sys/socket.h> 75#include <sys/socketvar.h> 76#include <sys/sx.h> 77#include <sys/systm.h> 78#include <sys/syslog.h> 79 80#include <net/if.h> 81#include <net/if_types.h> 82#include <net/route.h> 83 84#include <netinet/in.h> 85#include <netinet/in_var.h> 86#include <netinet/in_systm.h> 87#include <netinet/icmp6.h> 88#include <netinet/in_pcb.h> 89#include <netinet/ip6.h> 90#include <netinet6/ip6protosw.h> 91#include <netinet6/ip6_mroute.h> 92#include <netinet6/in6_pcb.h> 93#include <netinet6/ip6_var.h> 94#include <netinet6/nd6.h> 95#include <netinet6/raw_ip6.h> 96#include <netinet6/scope6_var.h> 97 98#ifdef IPSEC 99#include <netinet6/ipsec.h> 100#include <netinet6/ipsec6.h> 101#endif /*IPSEC*/ 102 103#ifdef FAST_IPSEC 104#include <netipsec/ipsec.h> 105#include <netipsec/ipsec6.h> 106#endif /* FAST_IPSEC */ 107 108#include <machine/stdarg.h> 109 110#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 111#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 112 113/* 114 * Raw interface to IP6 protocol. 115 */ 116 117extern struct inpcbhead ripcb; 118extern struct inpcbinfo ripcbinfo; 119extern u_long rip_sendspace; 120extern u_long rip_recvspace; 121 122struct rip6stat rip6stat; 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 136 * for raw_input routine, then pass them along with 137 * mbuf chain. 138 */ 139int 140rip6_input(mp, offp, proto) 141 struct mbuf **mp; 142 int *offp, proto; 143{ 144 struct mbuf *m = *mp; 145 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 146 register struct inpcb *in6p; 147 struct inpcb *last = 0; 148 struct mbuf *opts = NULL; 149 struct sockaddr_in6 fromsa; 150 151 rip6stat.rip6s_ipackets++; 152 153 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 154 /* XXX send icmp6 host/port unreach? */ 155 m_freem(m); 156 return IPPROTO_DONE; 157 } 158 159 init_sin6(&fromsa, m); /* general init */ 160 161 INP_INFO_RLOCK(&ripcbinfo); 162 LIST_FOREACH(in6p, &ripcb, inp_list) { 163 INP_LOCK(in6p); 164 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 165docontinue: 166 INP_UNLOCK(in6p); 167 continue; 168 } 169 if (in6p->in6p_ip6_nxt && 170 in6p->in6p_ip6_nxt != proto) 171 goto docontinue; 172 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 173 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 174 goto docontinue; 175 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 176 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 177 goto docontinue; 178 if (in6p->in6p_cksum != -1) { 179 rip6stat.rip6s_isum++; 180 if (in6_cksum(m, proto, *offp, 181 m->m_pkthdr.len - *offp)) { 182 rip6stat.rip6s_badsum++; 183 goto docontinue; 184 } 185 } 186 if (last) { 187 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 188 189#if defined(IPSEC) || defined(FAST_IPSEC) 190 /* 191 * Check AH/ESP integrity. 192 */ 193 if (n && ipsec6_in_reject(n, last)) { 194 m_freem(n); 195#ifdef IPSEC 196 ipsec6stat.in_polvio++; 197#endif /*IPSEC*/ 198 /* do not inject data into pcb */ 199 } else 200#endif /*IPSEC || FAST_IPSEC*/ 201 if (n) { 202 if (last->in6p_flags & IN6P_CONTROLOPTS || 203 last->in6p_socket->so_options & SO_TIMESTAMP) 204 ip6_savecontrol(last, n, &opts); 205 /* strip intermediate headers */ 206 m_adj(n, *offp); 207 if (sbappendaddr(&last->in6p_socket->so_rcv, 208 (struct sockaddr *)&fromsa, 209 n, opts) == 0) { 210 m_freem(n); 211 if (opts) 212 m_freem(opts); 213 rip6stat.rip6s_fullsock++; 214 } else 215 sorwakeup(last->in6p_socket); 216 opts = NULL; 217 } 218 INP_UNLOCK(last); 219 } 220 last = in6p; 221 } 222#if defined(IPSEC) || defined(FAST_IPSEC) 223 /* 224 * Check AH/ESP integrity. 225 */ 226 if (last && ipsec6_in_reject(m, last)) { 227 m_freem(m); 228#ifdef IPSEC 229 ipsec6stat.in_polvio++; 230#endif /*IPSEC*/ 231 ip6stat.ip6s_delivered--; 232 /* do not inject data into pcb */ 233 INP_UNLOCK(last); 234 } else 235#endif /*IPSEC || FAST_IPSEC*/ 236 if (last) { 237 if (last->in6p_flags & IN6P_CONTROLOPTS || 238 last->in6p_socket->so_options & SO_TIMESTAMP) 239 ip6_savecontrol(last, m, &opts); 240 /* strip intermediate headers */ 241 m_adj(m, *offp); 242 if (sbappendaddr(&last->in6p_socket->so_rcv, 243 (struct sockaddr *)&fromsa, m, opts) == 0) { 244 m_freem(m); 245 if (opts) 246 m_freem(opts); 247 rip6stat.rip6s_fullsock++; 248 } else 249 sorwakeup(last->in6p_socket); 250 INP_UNLOCK(last); 251 } else { 252 rip6stat.rip6s_nosock++; 253 if (m->m_flags & M_MCAST) 254 rip6stat.rip6s_nosockmcast++; 255 if (proto == IPPROTO_NONE) 256 m_freem(m); 257 else { 258 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 259 icmp6_error(m, ICMP6_PARAM_PROB, 260 ICMP6_PARAMPROB_NEXTHEADER, 261 prvnxtp - mtod(m, char *)); 262 } 263 ip6stat.ip6s_delivered--; 264 } 265 INP_INFO_RUNLOCK(&ripcbinfo); 266 return IPPROTO_DONE; 267} 268 269void 270rip6_ctlinput(cmd, sa, d) 271 int cmd; 272 struct sockaddr *sa; 273 void *d; 274{ 275 struct ip6_hdr *ip6; 276 struct mbuf *m; 277 int off = 0; 278 struct ip6ctlparam *ip6cp = NULL; 279 const struct sockaddr_in6 *sa6_src = NULL; 280 void *cmdarg; 281 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 282 283 if (sa->sa_family != AF_INET6 || 284 sa->sa_len != sizeof(struct sockaddr_in6)) 285 return; 286 287 if ((unsigned)cmd >= PRC_NCMDS) 288 return; 289 if (PRC_IS_REDIRECT(cmd)) 290 notify = in6_rtchange, d = NULL; 291 else if (cmd == PRC_HOSTDEAD) 292 d = NULL; 293 else if (inet6ctlerrmap[cmd] == 0) 294 return; 295 296 /* if the parameter is from icmp6, decode it. */ 297 if (d != NULL) { 298 ip6cp = (struct ip6ctlparam *)d; 299 m = ip6cp->ip6c_m; 300 ip6 = ip6cp->ip6c_ip6; 301 off = ip6cp->ip6c_off; 302 cmdarg = ip6cp->ip6c_cmdarg; 303 sa6_src = ip6cp->ip6c_src; 304 } else { 305 m = NULL; 306 ip6 = NULL; 307 cmdarg = NULL; 308 sa6_src = &sa6_any; 309 } 310 311 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 312 (const struct sockaddr *)sa6_src, 313 0, cmd, cmdarg, notify); 314} 315 316/* 317 * Generate IPv6 header and pass packet to ip6_output. 318 * Tack on options user may have setup with control call. 319 */ 320int 321#if __STDC__ 322rip6_output(struct mbuf *m, ...) 323#else 324rip6_output(m, va_alist) 325 struct mbuf *m; 326 va_dcl 327#endif 328{ 329 struct mbuf *control; 330 struct socket *so; 331 struct sockaddr_in6 *dstsock; 332 struct in6_addr *dst; 333 struct ip6_hdr *ip6; 334 struct inpcb *in6p; 335 u_int plen = m->m_pkthdr.len; 336 int error = 0; 337 struct ip6_pktopts opt, *optp; 338 struct ifnet *oifp = NULL; 339 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 340 int priv = 0; 341 int scope_ambiguous = 0; 342 struct in6_addr *in6a; 343 va_list ap; 344 345 va_start(ap, m); 346 so = va_arg(ap, struct socket *); 347 dstsock = va_arg(ap, struct sockaddr_in6 *); 348 control = va_arg(ap, struct mbuf *); 349 va_end(ap); 350 351 in6p = sotoin6pcb(so); 352 INP_LOCK(in6p); 353 354 priv = 0; 355 if (suser_cred(so->so_cred, SUSER_ALLOWJAIL) == 0) 356 priv = 1; 357 dst = &dstsock->sin6_addr; 358 if (control) { 359 if ((error = ip6_setpktopts(control, &opt, 360 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 361 != 0) { 362 goto bad; 363 } 364 optp = &opt; 365 } else 366 optp = in6p->in6p_outputopts; 367 368 /* 369 * Check and convert scope zone ID into internal form. 370 * XXX: we may still need to determine the zone later. 371 */ 372 if (!(so->so_state & SS_ISCONNECTED)) { 373 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 374 scope_ambiguous = 1; 375 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 376 goto bad; 377 } 378 379 /* 380 * For an ICMPv6 packet, we should know its type and code 381 * to update statistics. 382 */ 383 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 384 struct icmp6_hdr *icmp6; 385 if (m->m_len < sizeof(struct icmp6_hdr) && 386 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 387 error = ENOBUFS; 388 goto bad; 389 } 390 icmp6 = mtod(m, struct icmp6_hdr *); 391 type = icmp6->icmp6_type; 392 code = icmp6->icmp6_code; 393 } 394 395 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 396 if (m == NULL) { 397 error = ENOBUFS; 398 goto bad; 399 } 400 ip6 = mtod(m, struct ip6_hdr *); 401 402 /* 403 * Source address selection. 404 */ 405 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 406 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 407 if (error == 0) 408 error = EADDRNOTAVAIL; 409 goto bad; 410 } 411 ip6->ip6_src = *in6a; 412 413 if (oifp && scope_ambiguous) { 414 /* 415 * Application should provide a proper zone ID or the use of 416 * default zone IDs should be enabled. Unfortunately, some 417 * applications do not behave as it should, so we need a 418 * workaround. Even if an appropriate ID is not determined 419 * (when it's required), if we can determine the outgoing 420 * interface. determine the zone ID based on the interface. 421 */ 422 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 423 if (error != 0) 424 goto bad; 425 } 426 ip6->ip6_dst = dstsock->sin6_addr; 427 428 /* fill in the rest of the IPv6 header fields */ 429 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 430 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 431 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 432 (IPV6_VERSION & IPV6_VERSION_MASK); 433 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 434 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 435 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 436 437 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 438 in6p->in6p_cksum != -1) { 439 struct mbuf *n; 440 int off; 441 u_int16_t *p; 442 443 /* compute checksum */ 444 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 445 off = offsetof(struct icmp6_hdr, icmp6_cksum); 446 else 447 off = in6p->in6p_cksum; 448 if (plen < off + 1) { 449 error = EINVAL; 450 goto bad; 451 } 452 off += sizeof(struct ip6_hdr); 453 454 n = m; 455 while (n && n->m_len <= off) { 456 off -= n->m_len; 457 n = n->m_next; 458 } 459 if (!n) 460 goto bad; 461 p = (u_int16_t *)(mtod(n, caddr_t) + off); 462 *p = 0; 463 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 464 } 465 466 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 467 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 468 if (oifp) 469 icmp6_ifoutstat_inc(oifp, type, code); 470 icmp6stat.icp6s_outhist[type]++; 471 } else 472 rip6stat.rip6s_opackets++; 473 474 goto freectl; 475 476 bad: 477 if (m) 478 m_freem(m); 479 480 freectl: 481 if (control) { 482 ip6_clearpktopts(&opt, -1); 483 m_freem(control); 484 } 485 INP_UNLOCK(in6p); 486 return (error); 487} 488 489/* 490 * Raw IPv6 socket option processing. 491 */ 492int 493rip6_ctloutput(so, sopt) 494 struct socket *so; 495 struct sockopt *sopt; 496{ 497 int error; 498 499 if (sopt->sopt_level == IPPROTO_ICMPV6) 500 /* 501 * XXX: is it better to call icmp6_ctloutput() directly 502 * from protosw? 503 */ 504 return (icmp6_ctloutput(so, sopt)); 505 else if (sopt->sopt_level != IPPROTO_IPV6) 506 return (EINVAL); 507 508 error = 0; 509 510 switch (sopt->sopt_dir) { 511 case SOPT_GET: 512 switch (sopt->sopt_name) { 513 case MRT6_INIT: 514 case MRT6_DONE: 515 case MRT6_ADD_MIF: 516 case MRT6_DEL_MIF: 517 case MRT6_ADD_MFC: 518 case MRT6_DEL_MFC: 519 case MRT6_PIM: 520 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 521 EOPNOTSUPP; 522 break; 523 case IPV6_CHECKSUM: 524 error = ip6_raw_ctloutput(so, sopt); 525 break; 526 default: 527 error = ip6_ctloutput(so, sopt); 528 break; 529 } 530 break; 531 532 case SOPT_SET: 533 switch (sopt->sopt_name) { 534 case MRT6_INIT: 535 case MRT6_DONE: 536 case MRT6_ADD_MIF: 537 case MRT6_DEL_MIF: 538 case MRT6_ADD_MFC: 539 case MRT6_DEL_MFC: 540 case MRT6_PIM: 541 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 542 EOPNOTSUPP; 543 break; 544 case IPV6_CHECKSUM: 545 error = ip6_raw_ctloutput(so, sopt); 546 break; 547 default: 548 error = ip6_ctloutput(so, sopt); 549 break; 550 } 551 break; 552 } 553 554 return (error); 555} 556 557static int 558rip6_attach(struct socket *so, int proto, struct thread *td) 559{ 560 struct inpcb *inp; 561 struct icmp6_filter *filter; 562 int error; 563 564 inp = sotoinpcb(so); 565 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 566 if (td && (error = suser(td)) != 0) 567 return error; 568 error = soreserve(so, rip_sendspace, rip_recvspace); 569 if (error) 570 return error; 571 MALLOC(filter, struct icmp6_filter *, 572 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 573 if (filter == NULL) 574 return ENOMEM; 575 INP_INFO_WLOCK(&ripcbinfo); 576 error = in_pcballoc(so, &ripcbinfo); 577 if (error) { 578 INP_INFO_WUNLOCK(&ripcbinfo); 579 FREE(filter, M_PCB); 580 return error; 581 } 582 inp = (struct inpcb *)so->so_pcb; 583 INP_INFO_WUNLOCK(&ripcbinfo); 584 inp->inp_vflag |= INP_IPV6; 585 inp->in6p_ip6_nxt = (long)proto; 586 inp->in6p_hops = -1; /* use kernel default */ 587 inp->in6p_cksum = -1; 588 inp->in6p_icmp6filt = filter; 589 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 590 INP_UNLOCK(inp); 591 return 0; 592} 593 594static void 595rip6_detach(struct socket *so) 596{ 597 struct inpcb *inp; 598 599 inp = sotoinpcb(so); 600 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 601 602 if (so == ip6_mrouter && ip6_mrouter_done) 603 ip6_mrouter_done(); 604 /* xxx: RSVP */ 605 INP_INFO_WLOCK(&ripcbinfo); 606 INP_LOCK(inp); 607 if (inp->in6p_icmp6filt) { 608 FREE(inp->in6p_icmp6filt, M_PCB); 609 inp->in6p_icmp6filt = NULL; 610 } 611 in6_pcbdetach(inp); 612 in6_pcbfree(inp); 613 INP_INFO_WUNLOCK(&ripcbinfo); 614} 615 616/* XXXRW: This can't ever be called. */ 617static void 618rip6_abort(struct socket *so) 619{ 620 struct inpcb *inp; 621 622 inp = sotoinpcb(so); 623 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 624 625 soisdisconnected(so); 626} 627 628static void 629rip6_close(struct socket *so) 630{ 631 struct inpcb *inp; 632 633 inp = sotoinpcb(so); 634 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 635 636 soisdisconnected(so); 637} 638 639static int 640rip6_disconnect(struct socket *so) 641{ 642 struct inpcb *inp = sotoinpcb(so); 643 644 if ((so->so_state & SS_ISCONNECTED) == 0) 645 return ENOTCONN; 646 inp->in6p_faddr = in6addr_any; 647 rip6_abort(so); 648 return (0); 649} 650 651static int 652rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 653{ 654 struct inpcb *inp = sotoinpcb(so); 655 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 656 struct ifaddr *ia = NULL; 657 int error = 0; 658 659 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 660 if (nam->sa_len != sizeof(*addr)) 661 return EINVAL; 662 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 663 return EADDRNOTAVAIL; 664 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 665 return(error); 666 667 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 668 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 669 return EADDRNOTAVAIL; 670 if (ia && 671 ((struct in6_ifaddr *)ia)->ia6_flags & 672 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 673 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 674 return (EADDRNOTAVAIL); 675 } 676 INP_INFO_WLOCK(&ripcbinfo); 677 INP_LOCK(inp); 678 inp->in6p_laddr = addr->sin6_addr; 679 INP_UNLOCK(inp); 680 INP_INFO_WUNLOCK(&ripcbinfo); 681 return 0; 682} 683 684static int 685rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 686{ 687 struct inpcb *inp = sotoinpcb(so); 688 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 689 struct in6_addr *in6a = NULL; 690 struct ifnet *ifp = NULL; 691 int error = 0, scope_ambiguous = 0; 692 693 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 694 if (nam->sa_len != sizeof(*addr)) 695 return EINVAL; 696 if (TAILQ_EMPTY(&ifnet)) 697 return EADDRNOTAVAIL; 698 if (addr->sin6_family != AF_INET6) 699 return EAFNOSUPPORT; 700 701 /* 702 * Application should provide a proper zone ID or the use of 703 * default zone IDs should be enabled. Unfortunately, some 704 * applications do not behave as it should, so we need a 705 * workaround. Even if an appropriate ID is not determined, 706 * we'll see if we can determine the outgoing interface. If we 707 * can, determine the zone ID based on the interface below. 708 */ 709 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 710 scope_ambiguous = 1; 711 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 712 return(error); 713 714 INP_INFO_WLOCK(&ripcbinfo); 715 INP_LOCK(inp); 716 /* Source address selection. XXX: need pcblookup? */ 717 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 718 inp->in6p_moptions, NULL, 719 &inp->in6p_laddr, &ifp, &error); 720 if (in6a == NULL) { 721 INP_UNLOCK(inp); 722 INP_INFO_WUNLOCK(&ripcbinfo); 723 return (error ? error : EADDRNOTAVAIL); 724 } 725 726 /* XXX: see above */ 727 if (ifp && scope_ambiguous && 728 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 729 INP_UNLOCK(inp); 730 INP_INFO_WUNLOCK(&ripcbinfo); 731 return(error); 732 } 733 inp->in6p_faddr = addr->sin6_addr; 734 inp->in6p_laddr = *in6a; 735 soisconnected(so); 736 INP_UNLOCK(inp); 737 INP_INFO_WUNLOCK(&ripcbinfo); 738 return 0; 739} 740 741static int 742rip6_shutdown(struct socket *so) 743{ 744 struct inpcb *inp; 745 746 inp = sotoinpcb(so); 747 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 748 INP_LOCK(inp); 749 socantsendmore(so); 750 INP_UNLOCK(inp); 751 return 0; 752} 753 754static int 755rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 756 struct mbuf *control, struct thread *td) 757{ 758 struct inpcb *inp = sotoinpcb(so); 759 struct sockaddr_in6 tmp; 760 struct sockaddr_in6 *dst; 761 int ret; 762 763 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 764 INP_INFO_WLOCK(&ripcbinfo); 765 /* always copy sockaddr to avoid overwrites */ 766 /* Unlocked read. */ 767 if (so->so_state & SS_ISCONNECTED) { 768 if (nam) { 769 INP_INFO_WUNLOCK(&ripcbinfo); 770 m_freem(m); 771 return EISCONN; 772 } 773 /* XXX */ 774 bzero(&tmp, sizeof(tmp)); 775 tmp.sin6_family = AF_INET6; 776 tmp.sin6_len = sizeof(struct sockaddr_in6); 777 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 778 sizeof(struct in6_addr)); 779 dst = &tmp; 780 } else { 781 if (nam == NULL) { 782 INP_INFO_WUNLOCK(&ripcbinfo); 783 m_freem(m); 784 return ENOTCONN; 785 } 786 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 787 INP_INFO_WUNLOCK(&ripcbinfo); 788 m_freem(m); 789 return(EINVAL); 790 } 791 tmp = *(struct sockaddr_in6 *)nam; 792 dst = &tmp; 793 794 if (dst->sin6_family == AF_UNSPEC) { 795 /* 796 * XXX: we allow this case for backward 797 * compatibility to buggy applications that 798 * rely on old (and wrong) kernel behavior. 799 */ 800 log(LOG_INFO, "rip6 SEND: address family is " 801 "unspec. Assume AF_INET6\n"); 802 dst->sin6_family = AF_INET6; 803 } else if (dst->sin6_family != AF_INET6) { 804 INP_INFO_WUNLOCK(&ripcbinfo); 805 m_freem(m); 806 return(EAFNOSUPPORT); 807 } 808 } 809 ret = rip6_output(m, so, dst, control); 810 INP_INFO_WUNLOCK(&ripcbinfo); 811 return (ret); 812} 813 814struct pr_usrreqs rip6_usrreqs = { 815 .pru_abort = rip6_abort, 816 .pru_attach = rip6_attach, 817 .pru_bind = rip6_bind, 818 .pru_connect = rip6_connect, 819 .pru_control = in6_control, 820 .pru_detach = rip6_detach, 821 .pru_disconnect = rip6_disconnect, 822 .pru_peeraddr = in6_getpeeraddr, 823 .pru_send = rip6_send, 824 .pru_shutdown = rip6_shutdown, 825 .pru_sockaddr = in6_getsockaddr, 826 .pru_close = rip6_close, 827}; 828