Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet6/raw_ip6.c
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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. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 4. Neither the name of the University nor the names of its contributors 43 * may be used to endorse or promote products derived from this software 44 * without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 * 58 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 59 */ 60 61 #include <sys/cdefs.h> 62 __FBSDID("$FreeBSD$"); 63 64 #include "opt_ipsec.h" 65 #include "opt_inet6.h" 66 67 #include <sys/param.h> 68 #include <sys/errno.h> 69 #include <sys/lock.h> 70 #include <sys/malloc.h> 71 #include <sys/mbuf.h> 72 #include <sys/proc.h> 73 #include <sys/protosw.h> 74 #include <sys/signalvar.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/sx.h> 78 #include <sys/systm.h> 79 #include <sys/syslog.h> 80 81 #include <net/if.h> 82 #include <net/if_types.h> 83 #include <net/route.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/icmp6.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6protosw.h> 92 #include <netinet6/ip6_mroute.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/raw_ip6.h> 97 #include <netinet6/scope6_var.h> 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #include <netinet6/ipsec6.h> 102 #endif /*IPSEC*/ 103 104 #ifdef FAST_IPSEC 105 #include <netipsec/ipsec.h> 106 #include <netipsec/ipsec6.h> 107 #endif /* FAST_IPSEC */ 108 109 #include <machine/stdarg.h> 110 111 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 112 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 113 114 /* 115 * Raw interface to IP6 protocol. 116 */ 117 118 extern struct inpcbhead ripcb; 119 extern struct inpcbinfo ripcbinfo; 120 extern u_long rip_sendspace; 121 extern u_long rip_recvspace; 122 123 struct rip6stat rip6stat; 124 125 /* 126 * Setup generic address and protocol structures 127 * for raw_input routine, then pass them along with 128 * mbuf chain. 129 */ 130 int 131 rip6_input(mp, offp, proto) 132 struct mbuf **mp; 133 int *offp, proto; 134 { 135 struct mbuf *m = *mp; 136 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 137 register struct inpcb *in6p; 138 struct inpcb *last = 0; 139 struct mbuf *opts = NULL; 140 struct sockaddr_in6 fromsa; 141 142 rip6stat.rip6s_ipackets++; 143 144 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 145 /* XXX send icmp6 host/port unreach? */ 146 m_freem(m); 147 return IPPROTO_DONE; 148 } 149 150 init_sin6(&fromsa, m); /* general init */ 151 152 INP_INFO_RLOCK(&ripcbinfo); 153 LIST_FOREACH(in6p, &ripcb, inp_list) { 154 INP_LOCK(in6p); 155 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 156 docontinue: 157 INP_UNLOCK(in6p); 158 continue; 159 } 160 if (in6p->in6p_ip6_nxt && 161 in6p->in6p_ip6_nxt != proto) 162 goto docontinue; 163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 165 goto docontinue; 166 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 167 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 168 goto docontinue; 169 if (in6p->in6p_cksum != -1) { 170 rip6stat.rip6s_isum++; 171 if (in6_cksum(m, proto, *offp, 172 m->m_pkthdr.len - *offp)) { 173 rip6stat.rip6s_badsum++; 174 goto docontinue; 175 } 176 } 177 if (last) { 178 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 179 180 #if defined(IPSEC) || defined(FAST_IPSEC) 181 /* 182 * Check AH/ESP integrity. 183 */ 184 if (n && ipsec6_in_reject(n, last)) { 185 m_freem(n); 186 #ifdef IPSEC 187 ipsec6stat.in_polvio++; 188 #endif /*IPSEC*/ 189 /* do not inject data into pcb */ 190 } else 191 #endif /*IPSEC || FAST_IPSEC*/ 192 if (n) { 193 if (last->in6p_flags & IN6P_CONTROLOPTS || 194 last->in6p_socket->so_options & SO_TIMESTAMP) 195 ip6_savecontrol(last, n, &opts); 196 /* strip intermediate headers */ 197 m_adj(n, *offp); 198 if (sbappendaddr(&last->in6p_socket->so_rcv, 199 (struct sockaddr *)&fromsa, 200 n, opts) == 0) { 201 m_freem(n); 202 if (opts) 203 m_freem(opts); 204 rip6stat.rip6s_fullsock++; 205 } else 206 sorwakeup(last->in6p_socket); 207 opts = NULL; 208 } 209 INP_UNLOCK(last); 210 } 211 last = in6p; 212 } 213 #if defined(IPSEC) || defined(FAST_IPSEC) 214 /* 215 * Check AH/ESP integrity. 216 */ 217 if (last && ipsec6_in_reject(m, last)) { 218 m_freem(m); 219 #ifdef IPSEC 220 ipsec6stat.in_polvio++; 221 #endif /*IPSEC*/ 222 ip6stat.ip6s_delivered--; 223 /* do not inject data into pcb */ 224 INP_UNLOCK(last); 225 } else 226 #endif /*IPSEC || FAST_IPSEC*/ 227 if (last) { 228 if (last->in6p_flags & IN6P_CONTROLOPTS || 229 last->in6p_socket->so_options & SO_TIMESTAMP) 230 ip6_savecontrol(last, m, &opts); 231 /* strip intermediate headers */ 232 m_adj(m, *offp); 233 if (sbappendaddr(&last->in6p_socket->so_rcv, 234 (struct sockaddr *)&fromsa, m, opts) == 0) { 235 m_freem(m); 236 if (opts) 237 m_freem(opts); 238 rip6stat.rip6s_fullsock++; 239 } else 240 sorwakeup(last->in6p_socket); 241 INP_UNLOCK(last); 242 } else { 243 rip6stat.rip6s_nosock++; 244 if (m->m_flags & M_MCAST) 245 rip6stat.rip6s_nosockmcast++; 246 if (proto == IPPROTO_NONE) 247 m_freem(m); 248 else { 249 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 250 icmp6_error(m, ICMP6_PARAM_PROB, 251 ICMP6_PARAMPROB_NEXTHEADER, 252 prvnxtp - mtod(m, char *)); 253 } 254 ip6stat.ip6s_delivered--; 255 } 256 INP_INFO_RUNLOCK(&ripcbinfo); 257 return IPPROTO_DONE; 258 } 259 260 void 261 rip6_ctlinput(cmd, sa, d) 262 int cmd; 263 struct sockaddr *sa; 264 void *d; 265 { 266 struct ip6_hdr *ip6; 267 struct mbuf *m; 268 int off = 0; 269 struct ip6ctlparam *ip6cp = NULL; 270 const struct sockaddr_in6 *sa6_src = NULL; 271 void *cmdarg; 272 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 273 274 if (sa->sa_family != AF_INET6 || 275 sa->sa_len != sizeof(struct sockaddr_in6)) 276 return; 277 278 if ((unsigned)cmd >= PRC_NCMDS) 279 return; 280 if (PRC_IS_REDIRECT(cmd)) 281 notify = in6_rtchange, d = NULL; 282 else if (cmd == PRC_HOSTDEAD) 283 d = NULL; 284 else if (inet6ctlerrmap[cmd] == 0) 285 return; 286 287 /* if the parameter is from icmp6, decode it. */ 288 if (d != NULL) { 289 ip6cp = (struct ip6ctlparam *)d; 290 m = ip6cp->ip6c_m; 291 ip6 = ip6cp->ip6c_ip6; 292 off = ip6cp->ip6c_off; 293 cmdarg = ip6cp->ip6c_cmdarg; 294 sa6_src = ip6cp->ip6c_src; 295 } else { 296 m = NULL; 297 ip6 = NULL; 298 cmdarg = NULL; 299 sa6_src = &sa6_any; 300 } 301 302 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 303 (const struct sockaddr *)sa6_src, 304 0, cmd, cmdarg, notify); 305 } 306 307 /* 308 * Generate IPv6 header and pass packet to ip6_output. 309 * Tack on options user may have setup with control call. 310 */ 311 int 312 #if __STDC__ 313 rip6_output(struct mbuf *m, ...) 314 #else 315 rip6_output(m, va_alist) 316 struct mbuf *m; 317 va_dcl 318 #endif 319 { 320 struct mbuf *control; 321 struct socket *so; 322 struct sockaddr_in6 *dstsock; 323 struct in6_addr *dst; 324 struct ip6_hdr *ip6; 325 struct inpcb *in6p; 326 u_int plen = m->m_pkthdr.len; 327 int error = 0; 328 struct ip6_pktopts opt, *optp; 329 struct ifnet *oifp = NULL; 330 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 331 int priv = 0; 332 int scope_ambiguous = 0; 333 struct in6_addr *in6a; 334 va_list ap; 335 336 va_start(ap, m); 337 so = va_arg(ap, struct socket *); 338 dstsock = va_arg(ap, struct sockaddr_in6 *); 339 control = va_arg(ap, struct mbuf *); 340 va_end(ap); 341 342 in6p = sotoin6pcb(so); 343 INP_LOCK(in6p); 344 345 priv = 0; 346 if (so->so_cred->cr_uid == 0) 347 priv = 1; 348 dst = &dstsock->sin6_addr; 349 if (control) { 350 if ((error = ip6_setpktopts(control, &opt, 351 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 352 != 0) { 353 goto bad; 354 } 355 optp = &opt; 356 } else 357 optp = in6p->in6p_outputopts; 358 359 /* 360 * Check and convert scope zone ID into internal form. 361 * XXX: we may still need to determine the zone later. 362 */ 363 if (!(so->so_state & SS_ISCONNECTED)) { 364 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 365 scope_ambiguous = 1; 366 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 367 goto bad; 368 } 369 370 /* 371 * For an ICMPv6 packet, we should know its type and code 372 * to update statistics. 373 */ 374 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 375 struct icmp6_hdr *icmp6; 376 if (m->m_len < sizeof(struct icmp6_hdr) && 377 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 378 error = ENOBUFS; 379 goto bad; 380 } 381 icmp6 = mtod(m, struct icmp6_hdr *); 382 type = icmp6->icmp6_type; 383 code = icmp6->icmp6_code; 384 } 385 386 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 387 if (m == NULL) { 388 error = ENOBUFS; 389 goto bad; 390 } 391 ip6 = mtod(m, struct ip6_hdr *); 392 393 /* 394 * Source address selection. 395 */ 396 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 397 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 398 if (error == 0) 399 error = EADDRNOTAVAIL; 400 goto bad; 401 } 402 ip6->ip6_src = *in6a; 403 404 if (oifp && scope_ambiguous) { 405 /* 406 * Application should provide a proper zone ID or the use of 407 * default zone IDs should be enabled. Unfortunately, some 408 * applications do not behave as it should, so we need a 409 * workaround. Even if an appropriate ID is not determined 410 * (when it's required), if we can determine the outgoing 411 * interface. determine the zone ID based on the interface. 412 */ 413 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 414 if (error != 0) 415 goto bad; 416 } 417 ip6->ip6_dst = dstsock->sin6_addr; 418 419 /* fill in the rest of the IPv6 header fields */ 420 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 421 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 422 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 423 (IPV6_VERSION & IPV6_VERSION_MASK); 424 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 425 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 426 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 427 428 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 429 in6p->in6p_cksum != -1) { 430 struct mbuf *n; 431 int off; 432 u_int16_t *p; 433 434 /* compute checksum */ 435 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 436 off = offsetof(struct icmp6_hdr, icmp6_cksum); 437 else 438 off = in6p->in6p_cksum; 439 if (plen < off + 1) { 440 error = EINVAL; 441 goto bad; 442 } 443 off += sizeof(struct ip6_hdr); 444 445 n = m; 446 while (n && n->m_len <= off) { 447 off -= n->m_len; 448 n = n->m_next; 449 } 450 if (!n) 451 goto bad; 452 p = (u_int16_t *)(mtod(n, caddr_t) + off); 453 *p = 0; 454 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 455 } 456 457 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 458 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 459 if (oifp) 460 icmp6_ifoutstat_inc(oifp, type, code); 461 icmp6stat.icp6s_outhist[type]++; 462 } else 463 rip6stat.rip6s_opackets++; 464 465 goto freectl; 466 467 bad: 468 if (m) 469 m_freem(m); 470 471 freectl: 472 if (control) { 473 ip6_clearpktopts(&opt, -1); 474 m_freem(control); 475 } 476 INP_UNLOCK(in6p); 477 return (error); 478 } 479 480 /* 481 * Raw IPv6 socket option processing. 482 */ 483 int 484 rip6_ctloutput(so, sopt) 485 struct socket *so; 486 struct sockopt *sopt; 487 { 488 int error; 489 490 if (sopt->sopt_level == IPPROTO_ICMPV6) 491 /* 492 * XXX: is it better to call icmp6_ctloutput() directly 493 * from protosw? 494 */ 495 return (icmp6_ctloutput(so, sopt)); 496 else if (sopt->sopt_level != IPPROTO_IPV6) 497 return (EINVAL); 498 499 error = 0; 500 501 switch (sopt->sopt_dir) { 502 case SOPT_GET: 503 switch (sopt->sopt_name) { 504 case MRT6_INIT: 505 case MRT6_DONE: 506 case MRT6_ADD_MIF: 507 case MRT6_DEL_MIF: 508 case MRT6_ADD_MFC: 509 case MRT6_DEL_MFC: 510 case MRT6_PIM: 511 error = ip6_mrouter_get(so, sopt); 512 break; 513 case IPV6_CHECKSUM: 514 error = ip6_raw_ctloutput(so, sopt); 515 break; 516 default: 517 error = ip6_ctloutput(so, sopt); 518 break; 519 } 520 break; 521 522 case SOPT_SET: 523 switch (sopt->sopt_name) { 524 case MRT6_INIT: 525 case MRT6_DONE: 526 case MRT6_ADD_MIF: 527 case MRT6_DEL_MIF: 528 case MRT6_ADD_MFC: 529 case MRT6_DEL_MFC: 530 case MRT6_PIM: 531 error = ip6_mrouter_set(so, sopt); 532 break; 533 case IPV6_CHECKSUM: 534 error = ip6_raw_ctloutput(so, sopt); 535 break; 536 default: 537 error = ip6_ctloutput(so, sopt); 538 break; 539 } 540 break; 541 } 542 543 return (error); 544 } 545 546 static int 547 rip6_attach(struct socket *so, int proto, struct thread *td) 548 { 549 struct inpcb *inp; 550 struct icmp6_filter *filter; 551 int error, s; 552 553 INP_INFO_WLOCK(&ripcbinfo); 554 inp = sotoinpcb(so); 555 if (inp) { 556 INP_INFO_WUNLOCK(&ripcbinfo); 557 panic("rip6_attach"); 558 } 559 if (td && (error = suser(td)) != 0) { 560 INP_INFO_WUNLOCK(&ripcbinfo); 561 return error; 562 } 563 error = soreserve(so, rip_sendspace, rip_recvspace); 564 if (error) { 565 INP_INFO_WUNLOCK(&ripcbinfo); 566 return error; 567 } 568 MALLOC(filter, struct icmp6_filter *, 569 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 570 if (filter == NULL) { 571 INP_INFO_WUNLOCK(&ripcbinfo); 572 return ENOMEM; 573 } 574 s = splnet(); 575 error = in_pcballoc(so, &ripcbinfo); 576 splx(s); 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 } 593 594 static int 595 rip6_detach(struct socket *so) 596 { 597 struct inpcb *inp; 598 599 INP_INFO_WLOCK(&ripcbinfo); 600 inp = sotoinpcb(so); 601 if (inp == 0) { 602 INP_INFO_WUNLOCK(&ripcbinfo); 603 panic("rip6_detach"); 604 } 605 /* xxx: RSVP */ 606 if (so == ip6_mrouter) 607 ip6_mrouter_done(); 608 if (inp->in6p_icmp6filt) { 609 FREE(inp->in6p_icmp6filt, M_PCB); 610 inp->in6p_icmp6filt = NULL; 611 } 612 INP_LOCK(inp); 613 in6_pcbdetach(inp); 614 INP_INFO_WUNLOCK(&ripcbinfo); 615 return 0; 616 } 617 618 static int 619 rip6_abort(struct socket *so) 620 { 621 soisdisconnected(so); 622 return rip6_detach(so); 623 } 624 625 static int 626 rip6_disconnect(struct socket *so) 627 { 628 struct inpcb *inp = sotoinpcb(so); 629 630 if ((so->so_state & SS_ISCONNECTED) == 0) 631 return ENOTCONN; 632 inp->in6p_faddr = in6addr_any; 633 return rip6_abort(so); 634 } 635 636 static int 637 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 638 { 639 struct inpcb *inp = sotoinpcb(so); 640 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 641 struct ifaddr *ia = NULL; 642 int error = 0; 643 644 if (nam->sa_len != sizeof(*addr)) 645 return EINVAL; 646 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 647 return EADDRNOTAVAIL; 648 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 649 return(error); 650 651 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 652 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 653 return EADDRNOTAVAIL; 654 if (ia && 655 ((struct in6_ifaddr *)ia)->ia6_flags & 656 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 657 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 658 return (EADDRNOTAVAIL); 659 } 660 INP_INFO_WLOCK(&ripcbinfo); 661 INP_LOCK(inp); 662 inp->in6p_laddr = addr->sin6_addr; 663 INP_UNLOCK(inp); 664 INP_INFO_WUNLOCK(&ripcbinfo); 665 return 0; 666 } 667 668 static int 669 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 670 { 671 struct inpcb *inp = sotoinpcb(so); 672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 673 struct in6_addr *in6a = NULL; 674 struct ifnet *ifp = NULL; 675 int error = 0, scope_ambiguous = 0; 676 677 if (nam->sa_len != sizeof(*addr)) 678 return EINVAL; 679 if (TAILQ_EMPTY(&ifnet)) 680 return EADDRNOTAVAIL; 681 if (addr->sin6_family != AF_INET6) 682 return EAFNOSUPPORT; 683 684 /* 685 * Application should provide a proper zone ID or the use of 686 * default zone IDs should be enabled. Unfortunately, some 687 * applications do not behave as it should, so we need a 688 * workaround. Even if an appropriate ID is not determined, 689 * we'll see if we can determine the outgoing interface. If we 690 * can, determine the zone ID based on the interface below. 691 */ 692 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 693 scope_ambiguous = 1; 694 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 695 return(error); 696 697 INP_INFO_WLOCK(&ripcbinfo); 698 INP_LOCK(inp); 699 /* Source address selection. XXX: need pcblookup? */ 700 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 701 inp->in6p_moptions, NULL, 702 &inp->in6p_laddr, &ifp, &error); 703 if (in6a == NULL) { 704 INP_UNLOCK(inp); 705 INP_INFO_WUNLOCK(&ripcbinfo); 706 return (error ? error : EADDRNOTAVAIL); 707 } 708 709 /* XXX: see above */ 710 if (ifp && scope_ambiguous && 711 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 712 INP_UNLOCK(inp); 713 INP_INFO_WUNLOCK(&ripcbinfo); 714 return(error); 715 } 716 inp->in6p_faddr = addr->sin6_addr; 717 inp->in6p_laddr = *in6a; 718 soisconnected(so); 719 INP_UNLOCK(inp); 720 INP_INFO_WUNLOCK(&ripcbinfo); 721 return 0; 722 } 723 724 static int 725 rip6_shutdown(struct socket *so) 726 { 727 struct inpcb *inp; 728 729 INP_INFO_RLOCK(&ripcbinfo); 730 inp = sotoinpcb(so); 731 INP_LOCK(inp); 732 INP_INFO_RUNLOCK(&ripcbinfo); 733 socantsendmore(so); 734 INP_UNLOCK(inp); 735 return 0; 736 } 737 738 static int 739 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 740 struct mbuf *control, struct thread *td) 741 { 742 struct inpcb *inp = sotoinpcb(so); 743 struct sockaddr_in6 tmp; 744 struct sockaddr_in6 *dst; 745 int ret; 746 747 INP_INFO_WLOCK(&ripcbinfo); 748 /* always copy sockaddr to avoid overwrites */ 749 /* Unlocked read. */ 750 if (so->so_state & SS_ISCONNECTED) { 751 if (nam) { 752 INP_INFO_WUNLOCK(&ripcbinfo); 753 m_freem(m); 754 return EISCONN; 755 } 756 /* XXX */ 757 bzero(&tmp, sizeof(tmp)); 758 tmp.sin6_family = AF_INET6; 759 tmp.sin6_len = sizeof(struct sockaddr_in6); 760 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 761 sizeof(struct in6_addr)); 762 dst = &tmp; 763 } else { 764 if (nam == NULL) { 765 INP_INFO_WUNLOCK(&ripcbinfo); 766 m_freem(m); 767 return ENOTCONN; 768 } 769 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 770 INP_INFO_WUNLOCK(&ripcbinfo); 771 m_freem(m); 772 return(EINVAL); 773 } 774 tmp = *(struct sockaddr_in6 *)nam; 775 dst = &tmp; 776 777 if (dst->sin6_family == AF_UNSPEC) { 778 /* 779 * XXX: we allow this case for backward 780 * compatibility to buggy applications that 781 * rely on old (and wrong) kernel behavior. 782 */ 783 log(LOG_INFO, "rip6 SEND: address family is " 784 "unspec. Assume AF_INET6\n"); 785 dst->sin6_family = AF_INET6; 786 } else if (dst->sin6_family != AF_INET6) { 787 INP_INFO_WUNLOCK(&ripcbinfo); 788 m_freem(m); 789 return(EAFNOSUPPORT); 790 } 791 } 792 ret = rip6_output(m, so, dst, control); 793 INP_INFO_WUNLOCK(&ripcbinfo); 794 return (ret); 795 } 796 797 struct pr_usrreqs rip6_usrreqs = { 798 .pru_abort = rip6_abort, 799 .pru_attach = rip6_attach, 800 .pru_bind = rip6_bind, 801 .pru_connect = rip6_connect, 802 .pru_control = in6_control, 803 .pru_detach = rip6_detach, 804 .pru_disconnect = rip6_disconnect, 805 .pru_peeraddr = in6_setpeeraddr, 806 .pru_send = rip6_send, 807 .pru_shutdown = rip6_shutdown, 808 .pru_sockaddr = in6_setsockaddr, 809 };
Cache object: d9b701e3ecd4eb4fa2a6661b92091bd7
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