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 * $FreeBSD$ 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 */ 116 117 extern struct inpcbhead ripcb; 118 extern struct inpcbinfo ripcbinfo; 119 extern u_long rip_sendspace; 120 extern u_long rip_recvspace; 121 122 struct 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 */ 129 int 130 rip6_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) { 155 docontinue: 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, proto, *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 INP_UNLOCK(last); 224 } else 225 #endif /*IPSEC || FAST_IPSEC*/ 226 if (last) { 227 if (last->in6p_flags & IN6P_CONTROLOPTS || 228 last->in6p_socket->so_options & SO_TIMESTAMP) 229 ip6_savecontrol(last, m, &opts); 230 /* strip intermediate headers */ 231 m_adj(m, *offp); 232 if (sbappendaddr(&last->in6p_socket->so_rcv, 233 (struct sockaddr *)&fromsa, m, opts) == 0) { 234 m_freem(m); 235 if (opts) 236 m_freem(opts); 237 rip6stat.rip6s_fullsock++; 238 } else 239 sorwakeup(last->in6p_socket); 240 INP_UNLOCK(last); 241 } else { 242 rip6stat.rip6s_nosock++; 243 if (m->m_flags & M_MCAST) 244 rip6stat.rip6s_nosockmcast++; 245 if (proto == IPPROTO_NONE) 246 m_freem(m); 247 else { 248 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 249 icmp6_error(m, ICMP6_PARAM_PROB, 250 ICMP6_PARAMPROB_NEXTHEADER, 251 prvnxtp - mtod(m, char *)); 252 } 253 ip6stat.ip6s_delivered--; 254 } 255 INP_INFO_RUNLOCK(&ripcbinfo); 256 return IPPROTO_DONE; 257 } 258 259 void 260 rip6_ctlinput(cmd, sa, d) 261 int cmd; 262 struct sockaddr *sa; 263 void *d; 264 { 265 struct ip6_hdr *ip6; 266 struct mbuf *m; 267 int off = 0; 268 struct ip6ctlparam *ip6cp = NULL; 269 const struct sockaddr_in6 *sa6_src = NULL; 270 void *cmdarg; 271 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 272 273 if (sa->sa_family != AF_INET6 || 274 sa->sa_len != sizeof(struct sockaddr_in6)) 275 return; 276 277 if ((unsigned)cmd >= PRC_NCMDS) 278 return; 279 if (PRC_IS_REDIRECT(cmd)) 280 notify = in6_rtchange, d = NULL; 281 else if (cmd == PRC_HOSTDEAD) 282 d = NULL; 283 else if (inet6ctlerrmap[cmd] == 0) 284 return; 285 286 /* if the parameter is from icmp6, decode it. */ 287 if (d != NULL) { 288 ip6cp = (struct ip6ctlparam *)d; 289 m = ip6cp->ip6c_m; 290 ip6 = ip6cp->ip6c_ip6; 291 off = ip6cp->ip6c_off; 292 cmdarg = ip6cp->ip6c_cmdarg; 293 sa6_src = ip6cp->ip6c_src; 294 } else { 295 m = NULL; 296 ip6 = NULL; 297 cmdarg = NULL; 298 sa6_src = &sa6_any; 299 } 300 301 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 302 (const struct sockaddr *)sa6_src, 303 0, cmd, cmdarg, notify); 304 } 305 306 /* 307 * Generate IPv6 header and pass packet to ip6_output. 308 * Tack on options user may have setup with control call. 309 */ 310 int 311 #if __STDC__ 312 rip6_output(struct mbuf *m, ...) 313 #else 314 rip6_output(m, va_alist) 315 struct mbuf *m; 316 va_dcl 317 #endif 318 { 319 struct mbuf *control; 320 struct socket *so; 321 struct sockaddr_in6 *dstsock; 322 struct in6_addr *dst; 323 struct ip6_hdr *ip6; 324 struct inpcb *in6p; 325 u_int plen = m->m_pkthdr.len; 326 int error = 0; 327 struct ip6_pktopts opt, *optp; 328 struct ifnet *oifp = NULL; 329 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 330 int priv = 0; 331 int scope_ambiguous = 0; 332 struct in6_addr *in6a; 333 va_list ap; 334 335 va_start(ap, m); 336 so = va_arg(ap, struct socket *); 337 dstsock = va_arg(ap, struct sockaddr_in6 *); 338 control = va_arg(ap, struct mbuf *); 339 va_end(ap); 340 341 in6p = sotoin6pcb(so); 342 INP_LOCK(in6p); 343 344 priv = 0; 345 if (suser_cred(so->so_cred, SUSER_ALLOWJAIL) == 0) 346 priv = 1; 347 dst = &dstsock->sin6_addr; 348 if (control) { 349 if ((error = ip6_setpktopts(control, &opt, 350 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 351 != 0) { 352 goto bad; 353 } 354 optp = &opt; 355 } else 356 optp = in6p->in6p_outputopts; 357 358 /* 359 * Check and convert scope zone ID into internal form. 360 * XXX: we may still need to determine the zone later. 361 */ 362 if (!(so->so_state & SS_ISCONNECTED)) { 363 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 364 scope_ambiguous = 1; 365 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 366 goto bad; 367 } 368 369 /* 370 * For an ICMPv6 packet, we should know its type and code 371 * to update statistics. 372 */ 373 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 374 struct icmp6_hdr *icmp6; 375 if (m->m_len < sizeof(struct icmp6_hdr) && 376 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 377 error = ENOBUFS; 378 goto bad; 379 } 380 icmp6 = mtod(m, struct icmp6_hdr *); 381 type = icmp6->icmp6_type; 382 code = icmp6->icmp6_code; 383 } 384 385 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 386 if (m == NULL) { 387 error = ENOBUFS; 388 goto bad; 389 } 390 ip6 = mtod(m, struct ip6_hdr *); 391 392 /* 393 * Source address selection. 394 */ 395 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 396 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 397 if (error == 0) 398 error = EADDRNOTAVAIL; 399 goto bad; 400 } 401 ip6->ip6_src = *in6a; 402 403 if (oifp && scope_ambiguous) { 404 /* 405 * Application should provide a proper zone ID or the use of 406 * default zone IDs should be enabled. Unfortunately, some 407 * applications do not behave as it should, so we need a 408 * workaround. Even if an appropriate ID is not determined 409 * (when it's required), if we can determine the outgoing 410 * interface. determine the zone ID based on the interface. 411 */ 412 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 413 if (error != 0) 414 goto bad; 415 } 416 ip6->ip6_dst = dstsock->sin6_addr; 417 418 /* fill in the rest of the IPv6 header fields */ 419 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 420 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 421 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 422 (IPV6_VERSION & IPV6_VERSION_MASK); 423 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 424 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 425 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 426 427 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 428 in6p->in6p_cksum != -1) { 429 struct mbuf *n; 430 int off; 431 u_int16_t *p; 432 433 /* compute checksum */ 434 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 435 off = offsetof(struct icmp6_hdr, icmp6_cksum); 436 else 437 off = in6p->in6p_cksum; 438 if (plen < off + 1) { 439 error = EINVAL; 440 goto bad; 441 } 442 off += sizeof(struct ip6_hdr); 443 444 n = m; 445 while (n && n->m_len <= off) { 446 off -= n->m_len; 447 n = n->m_next; 448 } 449 if (!n) 450 goto bad; 451 p = (u_int16_t *)(mtod(n, caddr_t) + off); 452 *p = 0; 453 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 454 } 455 456 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 457 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 458 if (oifp) 459 icmp6_ifoutstat_inc(oifp, type, code); 460 icmp6stat.icp6s_outhist[type]++; 461 } else 462 rip6stat.rip6s_opackets++; 463 464 goto freectl; 465 466 bad: 467 if (m) 468 m_freem(m); 469 470 freectl: 471 if (control) { 472 ip6_clearpktopts(&opt, -1); 473 m_freem(control); 474 } 475 INP_UNLOCK(in6p); 476 return (error); 477 } 478 479 /* 480 * Raw IPv6 socket option processing. 481 */ 482 int 483 rip6_ctloutput(so, sopt) 484 struct socket *so; 485 struct sockopt *sopt; 486 { 487 int error; 488 489 if (sopt->sopt_level == IPPROTO_ICMPV6) 490 /* 491 * XXX: is it better to call icmp6_ctloutput() directly 492 * from protosw? 493 */ 494 return (icmp6_ctloutput(so, sopt)); 495 else if (sopt->sopt_level != IPPROTO_IPV6) 496 return (EINVAL); 497 498 error = 0; 499 500 switch (sopt->sopt_dir) { 501 case SOPT_GET: 502 switch (sopt->sopt_name) { 503 case MRT6_INIT: 504 case MRT6_DONE: 505 case MRT6_ADD_MIF: 506 case MRT6_DEL_MIF: 507 case MRT6_ADD_MFC: 508 case MRT6_DEL_MFC: 509 case MRT6_PIM: 510 error = ip6_mrouter_get(so, sopt); 511 break; 512 case IPV6_CHECKSUM: 513 error = ip6_raw_ctloutput(so, sopt); 514 break; 515 default: 516 error = ip6_ctloutput(so, sopt); 517 break; 518 } 519 break; 520 521 case SOPT_SET: 522 switch (sopt->sopt_name) { 523 case MRT6_INIT: 524 case MRT6_DONE: 525 case MRT6_ADD_MIF: 526 case MRT6_DEL_MIF: 527 case MRT6_ADD_MFC: 528 case MRT6_DEL_MFC: 529 case MRT6_PIM: 530 error = ip6_mrouter_set(so, sopt); 531 break; 532 case IPV6_CHECKSUM: 533 error = ip6_raw_ctloutput(so, sopt); 534 break; 535 default: 536 error = ip6_ctloutput(so, sopt); 537 break; 538 } 539 break; 540 } 541 542 return (error); 543 } 544 545 static int 546 rip6_attach(struct socket *so, int proto, struct thread *td) 547 { 548 struct inpcb *inp; 549 struct icmp6_filter *filter; 550 int error; 551 552 inp = sotoinpcb(so); 553 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 554 if (td && (error = suser(td)) != 0) 555 return error; 556 error = soreserve(so, rip_sendspace, rip_recvspace); 557 if (error) 558 return error; 559 MALLOC(filter, struct icmp6_filter *, 560 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 561 if (filter == NULL) 562 return ENOMEM; 563 INP_INFO_WLOCK(&ripcbinfo); 564 error = in_pcballoc(so, &ripcbinfo, "raw6inp"); 565 if (error) { 566 INP_INFO_WUNLOCK(&ripcbinfo); 567 FREE(filter, M_PCB); 568 return error; 569 } 570 inp = (struct inpcb *)so->so_pcb; 571 INP_LOCK(inp); 572 INP_INFO_WUNLOCK(&ripcbinfo); 573 inp->inp_vflag |= INP_IPV6; 574 inp->in6p_ip6_nxt = (long)proto; 575 inp->in6p_hops = -1; /* use kernel default */ 576 inp->in6p_cksum = -1; 577 inp->in6p_icmp6filt = filter; 578 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 579 INP_UNLOCK(inp); 580 return 0; 581 } 582 583 static void 584 rip6_detach(struct socket *so) 585 { 586 struct inpcb *inp; 587 588 inp = sotoinpcb(so); 589 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 590 /* xxx: RSVP */ 591 if (so == ip6_mrouter) 592 ip6_mrouter_done(); 593 if (inp->in6p_icmp6filt) { 594 FREE(inp->in6p_icmp6filt, M_PCB); 595 inp->in6p_icmp6filt = NULL; 596 } 597 INP_INFO_WLOCK(&ripcbinfo); 598 INP_LOCK(inp); 599 in6_pcbdetach(inp); 600 in6_pcbfree(inp); 601 INP_INFO_WUNLOCK(&ripcbinfo); 602 } 603 604 static void 605 rip6_abort(struct socket *so) 606 { 607 soisdisconnected(so); 608 rip6_detach(so); 609 } 610 611 static int 612 rip6_disconnect(struct socket *so) 613 { 614 struct inpcb *inp = sotoinpcb(so); 615 616 if ((so->so_state & SS_ISCONNECTED) == 0) 617 return ENOTCONN; 618 inp->in6p_faddr = in6addr_any; 619 rip6_abort(so); 620 return (0); 621 } 622 623 static int 624 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 625 { 626 struct inpcb *inp = sotoinpcb(so); 627 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 628 struct ifaddr *ia = NULL; 629 int error = 0; 630 631 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 632 if (nam->sa_len != sizeof(*addr)) 633 return EINVAL; 634 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 635 return EADDRNOTAVAIL; 636 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 637 return(error); 638 639 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 640 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 641 return EADDRNOTAVAIL; 642 if (ia && 643 ((struct in6_ifaddr *)ia)->ia6_flags & 644 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 645 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 646 return (EADDRNOTAVAIL); 647 } 648 INP_INFO_WLOCK(&ripcbinfo); 649 INP_LOCK(inp); 650 inp->in6p_laddr = addr->sin6_addr; 651 INP_UNLOCK(inp); 652 INP_INFO_WUNLOCK(&ripcbinfo); 653 return 0; 654 } 655 656 static int 657 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 658 { 659 struct inpcb *inp = sotoinpcb(so); 660 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 661 struct in6_addr *in6a = NULL; 662 struct ifnet *ifp = NULL; 663 int error = 0, scope_ambiguous = 0; 664 665 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 666 if (nam->sa_len != sizeof(*addr)) 667 return EINVAL; 668 if (TAILQ_EMPTY(&ifnet)) 669 return EADDRNOTAVAIL; 670 if (addr->sin6_family != AF_INET6) 671 return EAFNOSUPPORT; 672 673 /* 674 * Application should provide a proper zone ID or the use of 675 * default zone IDs should be enabled. Unfortunately, some 676 * applications do not behave as it should, so we need a 677 * workaround. Even if an appropriate ID is not determined, 678 * we'll see if we can determine the outgoing interface. If we 679 * can, determine the zone ID based on the interface below. 680 */ 681 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 682 scope_ambiguous = 1; 683 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 684 return(error); 685 686 INP_INFO_WLOCK(&ripcbinfo); 687 INP_LOCK(inp); 688 /* Source address selection. XXX: need pcblookup? */ 689 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 690 inp->in6p_moptions, NULL, 691 &inp->in6p_laddr, &ifp, &error); 692 if (in6a == NULL) { 693 INP_UNLOCK(inp); 694 INP_INFO_WUNLOCK(&ripcbinfo); 695 return (error ? error : EADDRNOTAVAIL); 696 } 697 698 /* XXX: see above */ 699 if (ifp && scope_ambiguous && 700 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 701 INP_UNLOCK(inp); 702 INP_INFO_WUNLOCK(&ripcbinfo); 703 return(error); 704 } 705 inp->in6p_faddr = addr->sin6_addr; 706 inp->in6p_laddr = *in6a; 707 soisconnected(so); 708 INP_UNLOCK(inp); 709 INP_INFO_WUNLOCK(&ripcbinfo); 710 return 0; 711 } 712 713 static int 714 rip6_shutdown(struct socket *so) 715 { 716 struct inpcb *inp; 717 718 inp = sotoinpcb(so); 719 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 720 INP_LOCK(inp); 721 socantsendmore(so); 722 INP_UNLOCK(inp); 723 return 0; 724 } 725 726 static int 727 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 728 struct mbuf *control, struct thread *td) 729 { 730 struct inpcb *inp = sotoinpcb(so); 731 struct sockaddr_in6 tmp; 732 struct sockaddr_in6 *dst; 733 int ret; 734 735 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 736 INP_INFO_WLOCK(&ripcbinfo); 737 /* always copy sockaddr to avoid overwrites */ 738 /* Unlocked read. */ 739 if (so->so_state & SS_ISCONNECTED) { 740 if (nam) { 741 INP_INFO_WUNLOCK(&ripcbinfo); 742 m_freem(m); 743 return EISCONN; 744 } 745 /* XXX */ 746 bzero(&tmp, sizeof(tmp)); 747 tmp.sin6_family = AF_INET6; 748 tmp.sin6_len = sizeof(struct sockaddr_in6); 749 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 750 sizeof(struct in6_addr)); 751 dst = &tmp; 752 } else { 753 if (nam == NULL) { 754 INP_INFO_WUNLOCK(&ripcbinfo); 755 m_freem(m); 756 return ENOTCONN; 757 } 758 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 759 INP_INFO_WUNLOCK(&ripcbinfo); 760 m_freem(m); 761 return(EINVAL); 762 } 763 tmp = *(struct sockaddr_in6 *)nam; 764 dst = &tmp; 765 766 if (dst->sin6_family == AF_UNSPEC) { 767 /* 768 * XXX: we allow this case for backward 769 * compatibility to buggy applications that 770 * rely on old (and wrong) kernel behavior. 771 */ 772 log(LOG_INFO, "rip6 SEND: address family is " 773 "unspec. Assume AF_INET6\n"); 774 dst->sin6_family = AF_INET6; 775 } else if (dst->sin6_family != AF_INET6) { 776 INP_INFO_WUNLOCK(&ripcbinfo); 777 m_freem(m); 778 return(EAFNOSUPPORT); 779 } 780 } 781 ret = rip6_output(m, so, dst, control); 782 INP_INFO_WUNLOCK(&ripcbinfo); 783 return (ret); 784 } 785 786 struct pr_usrreqs rip6_usrreqs = { 787 .pru_abort = rip6_abort, 788 .pru_attach = rip6_attach, 789 .pru_bind = rip6_bind, 790 .pru_connect = rip6_connect, 791 .pru_control = in6_control, 792 .pru_detach = rip6_detach, 793 .pru_disconnect = rip6_disconnect, 794 .pru_peeraddr = in6_setpeeraddr, 795 .pru_send = rip6_send, 796 .pru_shutdown = rip6_shutdown, 797 .pru_sockaddr = in6_setsockaddr, 798 }; 799