raw_ip6.c revision 148385
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 148385 2005-07-25 12:31:43Z ume $ 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 * Setup generic address and protocol structures 126 * for raw_input routine, then pass them along with 127 * mbuf chain. 128 */ 129int 130rip6_input(mp, offp, proto) 131 struct mbuf **mp; 132 int *offp, proto; 133{ 134 struct mbuf *m = *mp; 135 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 136 register struct inpcb *in6p; 137 struct inpcb *last = 0; 138 struct mbuf *opts = NULL; 139 struct sockaddr_in6 fromsa; 140 141 rip6stat.rip6s_ipackets++; 142 143 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 144 /* XXX send icmp6 host/port unreach? */ 145 m_freem(m); 146 return IPPROTO_DONE; 147 } 148 149 init_sin6(&fromsa, m); /* general init */ 150 151 INP_INFO_RLOCK(&ripcbinfo); 152 LIST_FOREACH(in6p, &ripcb, inp_list) { 153 INP_LOCK(in6p); 154 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 155docontinue: 156 INP_UNLOCK(in6p); 157 continue; 158 } 159 if (in6p->in6p_ip6_nxt && 160 in6p->in6p_ip6_nxt != proto) 161 goto docontinue; 162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 164 goto docontinue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 167 goto docontinue; 168 if (in6p->in6p_cksum != -1) { 169 rip6stat.rip6s_isum++; 170 if (in6_cksum(m, ip6->ip6_nxt, *offp, 171 m->m_pkthdr.len - *offp)) { 172 rip6stat.rip6s_badsum++; 173 goto docontinue; 174 } 175 } 176 if (last) { 177 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 178 179#if defined(IPSEC) || defined(FAST_IPSEC) 180 /* 181 * Check AH/ESP integrity. 182 */ 183 if (n && ipsec6_in_reject(n, last)) { 184 m_freem(n); 185#ifdef IPSEC 186 ipsec6stat.in_polvio++; 187#endif /*IPSEC*/ 188 /* do not inject data into pcb */ 189 } else 190#endif /*IPSEC || FAST_IPSEC*/ 191 if (n) { 192 if (last->in6p_flags & IN6P_CONTROLOPTS || 193 last->in6p_socket->so_options & SO_TIMESTAMP) 194 ip6_savecontrol(last, n, &opts); 195 /* strip intermediate headers */ 196 m_adj(n, *offp); 197 if (sbappendaddr(&last->in6p_socket->so_rcv, 198 (struct sockaddr *)&fromsa, 199 n, opts) == 0) { 200 m_freem(n); 201 if (opts) 202 m_freem(opts); 203 rip6stat.rip6s_fullsock++; 204 } else 205 sorwakeup(last->in6p_socket); 206 opts = NULL; 207 } 208 INP_UNLOCK(last); 209 } 210 last = in6p; 211 } 212#if defined(IPSEC) || defined(FAST_IPSEC) 213 /* 214 * Check AH/ESP integrity. 215 */ 216 if (last && ipsec6_in_reject(m, last)) { 217 m_freem(m); 218#ifdef IPSEC 219 ipsec6stat.in_polvio++; 220#endif /*IPSEC*/ 221 ip6stat.ip6s_delivered--; 222 /* do not inject data into pcb */ 223 } else 224#endif /*IPSEC || FAST_IPSEC*/ 225 if (last) { 226 if (last->in6p_flags & IN6P_CONTROLOPTS || 227 last->in6p_socket->so_options & SO_TIMESTAMP) 228 ip6_savecontrol(last, m, &opts); 229 /* strip intermediate headers */ 230 m_adj(m, *offp); 231 if (sbappendaddr(&last->in6p_socket->so_rcv, 232 (struct sockaddr *)&fromsa, m, opts) == 0) { 233 m_freem(m); 234 if (opts) 235 m_freem(opts); 236 rip6stat.rip6s_fullsock++; 237 } else 238 sorwakeup(last->in6p_socket); 239 INP_UNLOCK(last); 240 } else { 241 rip6stat.rip6s_nosock++; 242 if (m->m_flags & M_MCAST) 243 rip6stat.rip6s_nosockmcast++; 244 if (proto == IPPROTO_NONE) 245 m_freem(m); 246 else { 247 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 248 icmp6_error(m, ICMP6_PARAM_PROB, 249 ICMP6_PARAMPROB_NEXTHEADER, 250 prvnxtp - mtod(m, char *)); 251 } 252 ip6stat.ip6s_delivered--; 253 } 254 INP_INFO_RUNLOCK(&ripcbinfo); 255 return IPPROTO_DONE; 256} 257 258void 259rip6_ctlinput(cmd, sa, d) 260 int cmd; 261 struct sockaddr *sa; 262 void *d; 263{ 264 struct ip6_hdr *ip6; 265 struct mbuf *m; 266 int off = 0; 267 struct ip6ctlparam *ip6cp = NULL; 268 const struct sockaddr_in6 *sa6_src = NULL; 269 void *cmdarg; 270 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 271 272 if (sa->sa_family != AF_INET6 || 273 sa->sa_len != sizeof(struct sockaddr_in6)) 274 return; 275 276 if ((unsigned)cmd >= PRC_NCMDS) 277 return; 278 if (PRC_IS_REDIRECT(cmd)) 279 notify = in6_rtchange, d = NULL; 280 else if (cmd == PRC_HOSTDEAD) 281 d = NULL; 282 else if (inet6ctlerrmap[cmd] == 0) 283 return; 284 285 /* if the parameter is from icmp6, decode it. */ 286 if (d != NULL) { 287 ip6cp = (struct ip6ctlparam *)d; 288 m = ip6cp->ip6c_m; 289 ip6 = ip6cp->ip6c_ip6; 290 off = ip6cp->ip6c_off; 291 cmdarg = ip6cp->ip6c_cmdarg; 292 sa6_src = ip6cp->ip6c_src; 293 } else { 294 m = NULL; 295 ip6 = NULL; 296 cmdarg = NULL; 297 sa6_src = &sa6_any; 298 } 299 300 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 301 (const struct sockaddr *)sa6_src, 302 0, cmd, cmdarg, notify); 303} 304 305/* 306 * Generate IPv6 header and pass packet to ip6_output. 307 * Tack on options user may have setup with control call. 308 */ 309int 310#if __STDC__ 311rip6_output(struct mbuf *m, ...) 312#else 313rip6_output(m, va_alist) 314 struct mbuf *m; 315 va_dcl 316#endif 317{ 318 struct mbuf *control; 319 struct socket *so; 320 struct sockaddr_in6 *dstsock; 321 struct in6_addr *dst; 322 struct ip6_hdr *ip6; 323 struct inpcb *in6p; 324 u_int plen = m->m_pkthdr.len; 325 int error = 0; 326 struct ip6_pktopts opt, *optp; 327 struct ifnet *oifp = NULL; 328 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 329 int priv = 0; 330 int scope_ambiguous = 0; 331 struct in6_addr *in6a; 332 va_list ap; 333 334 va_start(ap, m); 335 so = va_arg(ap, struct socket *); 336 dstsock = va_arg(ap, struct sockaddr_in6 *); 337 control = va_arg(ap, struct mbuf *); 338 va_end(ap); 339 340 in6p = sotoin6pcb(so); 341 INP_LOCK(in6p); 342 343 priv = 0; 344 if (so->so_cred->cr_uid == 0) 345 priv = 1; 346 dst = &dstsock->sin6_addr; 347 if (control) { 348 if ((error = ip6_setpktopts(control, &opt, 349 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 350 != 0) { 351 goto bad; 352 } 353 optp = &opt; 354 } else 355 optp = in6p->in6p_outputopts; 356 357 /* 358 * Check and convert scope zone ID into internal form. 359 * XXX: we may still need to determine the zone later. 360 */ 361 if (!(so->so_state & SS_ISCONNECTED)) { 362 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 363 scope_ambiguous = 1; 364 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 365 goto bad; 366 } 367 368 /* 369 * For an ICMPv6 packet, we should know its type and code 370 * to update statistics. 371 */ 372 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 373 struct icmp6_hdr *icmp6; 374 if (m->m_len < sizeof(struct icmp6_hdr) && 375 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 376 error = ENOBUFS; 377 goto bad; 378 } 379 icmp6 = mtod(m, struct icmp6_hdr *); 380 type = icmp6->icmp6_type; 381 code = icmp6->icmp6_code; 382 } 383 384 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 385 if (m == NULL) { 386 error = ENOBUFS; 387 goto bad; 388 } 389 ip6 = mtod(m, struct ip6_hdr *); 390 391 /* 392 * Source address selection. 393 */ 394 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 395 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 396 if (error == 0) 397 error = EADDRNOTAVAIL; 398 goto bad; 399 } 400 ip6->ip6_src = *in6a; 401 402 if (oifp && scope_ambiguous) { 403 /* 404 * Application should provide a proper zone ID or the use of 405 * default zone IDs should be enabled. Unfortunately, some 406 * applications do not behave as it should, so we need a 407 * workaround. Even if an appropriate ID is not determined 408 * (when it's required), if we can determine the outgoing 409 * interface. determine the zone ID based on the interface. 410 */ 411 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 412 if (error != 0) 413 goto bad; 414 } 415 ip6->ip6_dst = dstsock->sin6_addr; 416 417 /* fill in the rest of the IPv6 header fields */ 418 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 419 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 420 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 421 (IPV6_VERSION & IPV6_VERSION_MASK); 422 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 423 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 424 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 425 426 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 427 in6p->in6p_cksum != -1) { 428 struct mbuf *n; 429 int off; 430 u_int16_t *p; 431 432 /* compute checksum */ 433 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 434 off = offsetof(struct icmp6_hdr, icmp6_cksum); 435 else 436 off = in6p->in6p_cksum; 437 if (plen < off + 1) { 438 error = EINVAL; 439 goto bad; 440 } 441 off += sizeof(struct ip6_hdr); 442 443 n = m; 444 while (n && n->m_len <= off) { 445 off -= n->m_len; 446 n = n->m_next; 447 } 448 if (!n) 449 goto bad; 450 p = (u_int16_t *)(mtod(n, caddr_t) + off); 451 *p = 0; 452 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 453 } 454 455 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 456 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 457 if (oifp) 458 icmp6_ifoutstat_inc(oifp, type, code); 459 icmp6stat.icp6s_outhist[type]++; 460 } else 461 rip6stat.rip6s_opackets++; 462 463 goto freectl; 464 465 bad: 466 if (m) 467 m_freem(m); 468 469 freectl: 470 if (control) { 471 ip6_clearpktopts(&opt, -1); 472 m_freem(control); 473 } 474 INP_UNLOCK(in6p); 475 return (error); 476} 477 478/* 479 * Raw IPv6 socket option processing. 480 */ 481int 482rip6_ctloutput(so, sopt) 483 struct socket *so; 484 struct sockopt *sopt; 485{ 486 int error; 487 488 if (sopt->sopt_level == IPPROTO_ICMPV6) 489 /* 490 * XXX: is it better to call icmp6_ctloutput() directly 491 * from protosw? 492 */ 493 return (icmp6_ctloutput(so, sopt)); 494 else if (sopt->sopt_level != IPPROTO_IPV6) 495 return (EINVAL); 496 497 error = 0; 498 499 switch (sopt->sopt_dir) { 500 case SOPT_GET: 501 switch (sopt->sopt_name) { 502 case MRT6_INIT: 503 case MRT6_DONE: 504 case MRT6_ADD_MIF: 505 case MRT6_DEL_MIF: 506 case MRT6_ADD_MFC: 507 case MRT6_DEL_MFC: 508 case MRT6_PIM: 509 error = ip6_mrouter_get(so, sopt); 510 break; 511 case IPV6_CHECKSUM: 512 error = ip6_raw_ctloutput(so, sopt); 513 break; 514 default: 515 error = ip6_ctloutput(so, sopt); 516 break; 517 } 518 break; 519 520 case SOPT_SET: 521 switch (sopt->sopt_name) { 522 case MRT6_INIT: 523 case MRT6_DONE: 524 case MRT6_ADD_MIF: 525 case MRT6_DEL_MIF: 526 case MRT6_ADD_MFC: 527 case MRT6_DEL_MFC: 528 case MRT6_PIM: 529 error = ip6_mrouter_set(so, sopt); 530 break; 531 case IPV6_CHECKSUM: 532 error = ip6_raw_ctloutput(so, sopt); 533 break; 534 default: 535 error = ip6_ctloutput(so, sopt); 536 break; 537 } 538 break; 539 } 540 541 return (error); 542} 543 544static int 545rip6_attach(struct socket *so, int proto, struct thread *td) 546{ 547 struct inpcb *inp; 548 struct icmp6_filter *filter; 549 int error, s; 550 551 INP_INFO_WLOCK(&ripcbinfo); 552 inp = sotoinpcb(so); 553 if (inp) { 554 INP_INFO_WUNLOCK(&ripcbinfo); 555 panic("rip6_attach"); 556 } 557 if (td && (error = suser(td)) != 0) { 558 INP_INFO_WUNLOCK(&ripcbinfo); 559 return error; 560 } 561 error = soreserve(so, rip_sendspace, rip_recvspace); 562 if (error) { 563 INP_INFO_WUNLOCK(&ripcbinfo); 564 return error; 565 } 566 MALLOC(filter, struct icmp6_filter *, 567 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 568 if (filter == NULL) 569 return ENOMEM; 570 s = splnet(); 571 error = in_pcballoc(so, &ripcbinfo, "raw6inp"); 572 splx(s); 573 if (error) { 574 INP_INFO_WUNLOCK(&ripcbinfo); 575 FREE(filter, M_PCB); 576 return error; 577 } 578 inp = (struct inpcb *)so->so_pcb; 579 INP_LOCK(inp); 580 INP_INFO_WUNLOCK(&ripcbinfo); 581 inp->inp_vflag |= INP_IPV6; 582 inp->in6p_ip6_nxt = (long)proto; 583 inp->in6p_hops = -1; /* use kernel default */ 584 inp->in6p_cksum = -1; 585 inp->in6p_icmp6filt = filter; 586 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 587 INP_UNLOCK(inp); 588 return 0; 589} 590 591static int 592rip6_detach(struct socket *so) 593{ 594 struct inpcb *inp; 595 596 INP_INFO_WLOCK(&ripcbinfo); 597 inp = sotoinpcb(so); 598 if (inp == 0) { 599 INP_INFO_WUNLOCK(&ripcbinfo); 600 panic("rip6_detach"); 601 } 602 /* xxx: RSVP */ 603 if (so == ip6_mrouter) 604 ip6_mrouter_done(); 605 if (inp->in6p_icmp6filt) { 606 FREE(inp->in6p_icmp6filt, M_PCB); 607 inp->in6p_icmp6filt = NULL; 608 } 609 INP_LOCK(inp); 610 in6_pcbdetach(inp); 611 INP_INFO_WUNLOCK(&ripcbinfo); 612 return 0; 613} 614 615static int 616rip6_abort(struct socket *so) 617{ 618 soisdisconnected(so); 619 return rip6_detach(so); 620} 621 622static int 623rip6_disconnect(struct socket *so) 624{ 625 struct inpcb *inp = sotoinpcb(so); 626 627 if ((so->so_state & SS_ISCONNECTED) == 0) 628 return ENOTCONN; 629 inp->in6p_faddr = in6addr_any; 630 return rip6_abort(so); 631} 632 633static int 634rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 635{ 636 struct inpcb *inp = sotoinpcb(so); 637 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 638 struct ifaddr *ia = NULL; 639 int error = 0; 640 641 if (nam->sa_len != sizeof(*addr)) 642 return EINVAL; 643 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 644 return EADDRNOTAVAIL; 645 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 646 return(error); 647 648 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 649 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 650 return EADDRNOTAVAIL; 651 if (ia && 652 ((struct in6_ifaddr *)ia)->ia6_flags & 653 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 654 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 655 return (EADDRNOTAVAIL); 656 } 657 INP_INFO_WLOCK(&ripcbinfo); 658 INP_LOCK(inp); 659 inp->in6p_laddr = addr->sin6_addr; 660 INP_UNLOCK(inp); 661 INP_INFO_WUNLOCK(&ripcbinfo); 662 return 0; 663} 664 665static int 666rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 667{ 668 struct inpcb *inp = sotoinpcb(so); 669 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 670 struct in6_addr *in6a = NULL; 671 struct ifnet *ifp = NULL; 672 int error = 0, scope_ambiguous = 0; 673 674 if (nam->sa_len != sizeof(*addr)) 675 return EINVAL; 676 if (TAILQ_EMPTY(&ifnet)) 677 return EADDRNOTAVAIL; 678 if (addr->sin6_family != AF_INET6) 679 return EAFNOSUPPORT; 680 681 /* 682 * Application should provide a proper zone ID or the use of 683 * default zone IDs should be enabled. Unfortunately, some 684 * applications do not behave as it should, so we need a 685 * workaround. Even if an appropriate ID is not determined, 686 * we'll see if we can determine the outgoing interface. If we 687 * can, determine the zone ID based on the interface below. 688 */ 689 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 690 scope_ambiguous = 1; 691 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 692 return(error); 693 694 INP_INFO_WLOCK(&ripcbinfo); 695 INP_LOCK(inp); 696 /* Source address selection. XXX: need pcblookup? */ 697 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 698 inp->in6p_moptions, NULL, 699 &inp->in6p_laddr, &ifp, &error); 700 if (in6a == NULL) { 701 INP_UNLOCK(inp); 702 INP_INFO_WUNLOCK(&ripcbinfo); 703 return (error ? error : EADDRNOTAVAIL); 704 } 705 706 /* XXX: see above */ 707 if (ifp && scope_ambiguous && 708 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 709 INP_UNLOCK(inp); 710 INP_INFO_WUNLOCK(&ripcbinfo); 711 return(error); 712 } 713 inp->in6p_faddr = addr->sin6_addr; 714 inp->in6p_laddr = *in6a; 715 soisconnected(so); 716 INP_UNLOCK(inp); 717 INP_INFO_WUNLOCK(&ripcbinfo); 718 return 0; 719} 720 721static int 722rip6_shutdown(struct socket *so) 723{ 724 struct inpcb *inp; 725 726 INP_INFO_RLOCK(&ripcbinfo); 727 inp = sotoinpcb(so); 728 INP_LOCK(inp); 729 INP_INFO_RUNLOCK(&ripcbinfo); 730 socantsendmore(so); 731 INP_UNLOCK(inp); 732 return 0; 733} 734 735static int 736rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 737 struct mbuf *control, struct thread *td) 738{ 739 struct inpcb *inp = sotoinpcb(so); 740 struct sockaddr_in6 tmp; 741 struct sockaddr_in6 *dst; 742 int ret; 743 744 INP_INFO_WLOCK(&ripcbinfo); 745 /* always copy sockaddr to avoid overwrites */ 746 /* Unlocked read. */ 747 if (so->so_state & SS_ISCONNECTED) { 748 if (nam) { 749 INP_INFO_WUNLOCK(&ripcbinfo); 750 m_freem(m); 751 return EISCONN; 752 } 753 /* XXX */ 754 bzero(&tmp, sizeof(tmp)); 755 tmp.sin6_family = AF_INET6; 756 tmp.sin6_len = sizeof(struct sockaddr_in6); 757 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 758 sizeof(struct in6_addr)); 759 dst = &tmp; 760 } else { 761 if (nam == NULL) { 762 INP_INFO_WUNLOCK(&ripcbinfo); 763 m_freem(m); 764 return ENOTCONN; 765 } 766 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 767 INP_INFO_WUNLOCK(&ripcbinfo); 768 m_freem(m); 769 return(EINVAL); 770 } 771 tmp = *(struct sockaddr_in6 *)nam; 772 dst = &tmp; 773 774 if (dst->sin6_family == AF_UNSPEC) { 775 /* 776 * XXX: we allow this case for backward 777 * compatibility to buggy applications that 778 * rely on old (and wrong) kernel behavior. 779 */ 780 log(LOG_INFO, "rip6 SEND: address family is " 781 "unspec. Assume AF_INET6\n"); 782 dst->sin6_family = AF_INET6; 783 } else if (dst->sin6_family != AF_INET6) { 784 INP_INFO_WUNLOCK(&ripcbinfo); 785 m_freem(m); 786 return(EAFNOSUPPORT); 787 } 788 } 789 ret = rip6_output(m, so, dst, control); 790 INP_INFO_WUNLOCK(&ripcbinfo); 791 return (ret); 792} 793 794struct pr_usrreqs rip6_usrreqs = { 795 .pru_abort = rip6_abort, 796 .pru_attach = rip6_attach, 797 .pru_bind = rip6_bind, 798 .pru_connect = rip6_connect, 799 .pru_control = in6_control, 800 .pru_detach = rip6_detach, 801 .pru_disconnect = rip6_disconnect, 802 .pru_peeraddr = in6_setpeeraddr, 803 .pru_send = rip6_send, 804 .pru_shutdown = rip6_shutdown, 805 .pru_sockaddr = in6_setsockaddr, 806}; 807