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/priv.h> 73 #include <sys/proc.h> 74 #include <sys/protosw.h> 75 #include <sys/signalvar.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/sx.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 <netipsec/ipsec.h> 101 #include <netipsec/ipsec6.h> 102 #endif /* IPSEC */ 103 104 #include <machine/stdarg.h> 105 106 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 107 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 108 109 /* 110 * Raw interface to IP6 protocol. 111 */ 112 113 extern struct inpcbhead ripcb; 114 extern struct inpcbinfo ripcbinfo; 115 extern u_long rip_sendspace; 116 extern u_long rip_recvspace; 117 118 struct rip6stat rip6stat; 119 120 /* 121 * Hooks for multicast forwarding. 122 */ 123 struct socket *ip6_mrouter = NULL; 124 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 125 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 126 int (*ip6_mrouter_done)(void); 127 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 128 int (*mrt6_ioctl)(int, caddr_t); 129 130 /* 131 * Setup generic address and protocol structures 132 * for raw_input routine, then pass them along with 133 * mbuf chain. 134 */ 135 int 136 rip6_input(struct mbuf **mp, int *offp, int proto) 137 { 138 struct mbuf *m = *mp; 139 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 140 register struct inpcb *in6p; 141 struct inpcb *last = 0; 142 struct mbuf *opts = NULL; 143 struct sockaddr_in6 fromsa; 144 145 rip6stat.rip6s_ipackets++; 146 147 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 148 /* XXX send icmp6 host/port unreach? */ 149 m_freem(m); 150 return IPPROTO_DONE; 151 } 152 153 init_sin6(&fromsa, m); /* general init */ 154 155 INP_INFO_RLOCK(&ripcbinfo); 156 LIST_FOREACH(in6p, &ripcb, inp_list) { 157 INP_RLOCK(in6p); 158 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 159 docontinue: 160 INP_RUNLOCK(in6p); 161 continue; 162 } 163 if (in6p->in6p_ip6_nxt && 164 in6p->in6p_ip6_nxt != proto) 165 goto docontinue; 166 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 167 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 168 goto docontinue; 169 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 170 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 171 goto docontinue; 172 if (in6p->in6p_cksum != -1) { 173 rip6stat.rip6s_isum++; 174 if (in6_cksum(m, proto, *offp, 175 m->m_pkthdr.len - *offp)) { 176 rip6stat.rip6s_badsum++; 177 goto docontinue; 178 } 179 } 180 if (last) { 181 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 182 183 #ifdef IPSEC 184 /* 185 * Check AH/ESP integrity. 186 */ 187 if (n && ipsec6_in_reject(n, last)) { 188 m_freem(n); 189 ipsec6stat.in_polvio++; 190 /* do not inject data into pcb */ 191 } else 192 #endif /* IPSEC */ 193 if (n) { 194 if (last->in6p_flags & IN6P_CONTROLOPTS || 195 last->in6p_socket->so_options & SO_TIMESTAMP) 196 ip6_savecontrol(last, n, &opts); 197 /* strip intermediate headers */ 198 m_adj(n, *offp); 199 if (sbappendaddr(&last->in6p_socket->so_rcv, 200 (struct sockaddr *)&fromsa, 201 n, opts) == 0) { 202 m_freem(n); 203 if (opts) 204 m_freem(opts); 205 rip6stat.rip6s_fullsock++; 206 } else 207 sorwakeup(last->in6p_socket); 208 opts = NULL; 209 } 210 INP_RUNLOCK(last); 211 } 212 last = in6p; 213 } 214 #ifdef IPSEC 215 /* 216 * Check AH/ESP integrity. 217 */ 218 if (last && ipsec6_in_reject(m, last)) { 219 m_freem(m); 220 ipsec6stat.in_polvio++; 221 ip6stat.ip6s_delivered--; 222 /* do not inject data into pcb */ 223 INP_RUNLOCK(last); 224 } else 225 #endif /* 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_RUNLOCK(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(int cmd, struct sockaddr *sa, void *d) 261 { 262 struct ip6_hdr *ip6; 263 struct mbuf *m; 264 int off = 0; 265 struct ip6ctlparam *ip6cp = NULL; 266 const struct sockaddr_in6 *sa6_src = NULL; 267 void *cmdarg; 268 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 269 270 if (sa->sa_family != AF_INET6 || 271 sa->sa_len != sizeof(struct sockaddr_in6)) 272 return; 273 274 if ((unsigned)cmd >= PRC_NCMDS) 275 return; 276 if (PRC_IS_REDIRECT(cmd)) 277 notify = in6_rtchange, d = NULL; 278 else if (cmd == PRC_HOSTDEAD) 279 d = NULL; 280 else if (inet6ctlerrmap[cmd] == 0) 281 return; 282 283 /* if the parameter is from icmp6, decode it. */ 284 if (d != NULL) { 285 ip6cp = (struct ip6ctlparam *)d; 286 m = ip6cp->ip6c_m; 287 ip6 = ip6cp->ip6c_ip6; 288 off = ip6cp->ip6c_off; 289 cmdarg = ip6cp->ip6c_cmdarg; 290 sa6_src = ip6cp->ip6c_src; 291 } else { 292 m = NULL; 293 ip6 = NULL; 294 cmdarg = NULL; 295 sa6_src = &sa6_any; 296 } 297 298 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 299 (const struct sockaddr *)sa6_src, 300 0, cmd, cmdarg, notify); 301 } 302 303 /* 304 * Generate IPv6 header and pass packet to ip6_output. 305 * Tack on options user may have setup with control call. 306 */ 307 int 308 #if __STDC__ 309 rip6_output(struct mbuf *m, ...) 310 #else 311 rip6_output(m, va_alist) 312 struct mbuf *m; 313 va_dcl 314 #endif 315 { 316 struct mbuf *control; 317 struct socket *so; 318 struct sockaddr_in6 *dstsock; 319 struct in6_addr *dst; 320 struct ip6_hdr *ip6; 321 struct inpcb *in6p; 322 u_int plen = m->m_pkthdr.len; 323 int error = 0; 324 struct ip6_pktopts opt, *optp; 325 struct ifnet *oifp = NULL; 326 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 327 int scope_ambiguous = 0; 328 struct in6_addr *in6a; 329 va_list ap; 330 331 va_start(ap, m); 332 so = va_arg(ap, struct socket *); 333 dstsock = va_arg(ap, struct sockaddr_in6 *); 334 control = va_arg(ap, struct mbuf *); 335 va_end(ap); 336 337 in6p = sotoin6pcb(so); 338 INP_WLOCK(in6p); 339 340 dst = &dstsock->sin6_addr; 341 if (control) { 342 if ((error = ip6_setpktopts(control, &opt, 343 in6p->in6p_outputopts, so->so_cred, 344 so->so_proto->pr_protocol)) != 0) { 345 goto bad; 346 } 347 optp = &opt; 348 } else 349 optp = in6p->in6p_outputopts; 350 351 /* 352 * Check and convert scope zone ID into internal form. 353 * XXX: we may still need to determine the zone later. 354 */ 355 if (!(so->so_state & SS_ISCONNECTED)) { 356 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 357 scope_ambiguous = 1; 358 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 359 goto bad; 360 } 361 362 /* 363 * For an ICMPv6 packet, we should know its type and code 364 * to update statistics. 365 */ 366 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 367 struct icmp6_hdr *icmp6; 368 if (m->m_len < sizeof(struct icmp6_hdr) && 369 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 370 error = ENOBUFS; 371 goto bad; 372 } 373 icmp6 = mtod(m, struct icmp6_hdr *); 374 type = icmp6->icmp6_type; 375 code = icmp6->icmp6_code; 376 } 377 378 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 379 if (m == NULL) { 380 error = ENOBUFS; 381 goto bad; 382 } 383 ip6 = mtod(m, struct ip6_hdr *); 384 385 /* 386 * Source address selection. 387 */ 388 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 389 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 390 if (error == 0) 391 error = EADDRNOTAVAIL; 392 goto bad; 393 } 394 ip6->ip6_src = *in6a; 395 396 if (oifp && scope_ambiguous) { 397 /* 398 * Application should provide a proper zone ID or the use of 399 * default zone IDs should be enabled. Unfortunately, some 400 * applications do not behave as it should, so we need a 401 * workaround. Even if an appropriate ID is not determined 402 * (when it's required), if we can determine the outgoing 403 * interface. determine the zone ID based on the interface. 404 */ 405 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 406 if (error != 0) 407 goto bad; 408 } 409 ip6->ip6_dst = dstsock->sin6_addr; 410 411 /* fill in the rest of the IPv6 header fields */ 412 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 413 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 414 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 415 (IPV6_VERSION & IPV6_VERSION_MASK); 416 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 417 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 418 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 419 420 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 421 in6p->in6p_cksum != -1) { 422 struct mbuf *n; 423 int off; 424 u_int16_t *p; 425 426 /* compute checksum */ 427 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 428 off = offsetof(struct icmp6_hdr, icmp6_cksum); 429 else 430 off = in6p->in6p_cksum; 431 if (plen < off + 1) { 432 error = EINVAL; 433 goto bad; 434 } 435 off += sizeof(struct ip6_hdr); 436 437 n = m; 438 while (n && n->m_len <= off) { 439 off -= n->m_len; 440 n = n->m_next; 441 } 442 if (!n) 443 goto bad; 444 p = (u_int16_t *)(mtod(n, caddr_t) + off); 445 *p = 0; 446 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 447 } 448 449 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 451 if (oifp) 452 icmp6_ifoutstat_inc(oifp, type, code); 453 icmp6stat.icp6s_outhist[type]++; 454 } else 455 rip6stat.rip6s_opackets++; 456 457 goto freectl; 458 459 bad: 460 if (m) 461 m_freem(m); 462 463 freectl: 464 if (control) { 465 ip6_clearpktopts(&opt, -1); 466 m_freem(control); 467 } 468 INP_WUNLOCK(in6p); 469 return (error); 470 } 471 472 /* 473 * Raw IPv6 socket option processing. 474 */ 475 int 476 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 477 { 478 int error; 479 480 if (sopt->sopt_level == IPPROTO_ICMPV6) 481 /* 482 * XXX: is it better to call icmp6_ctloutput() directly 483 * from protosw? 484 */ 485 return (icmp6_ctloutput(so, sopt)); 486 else if (sopt->sopt_level != IPPROTO_IPV6) 487 return (EINVAL); 488 489 error = 0; 490 491 switch (sopt->sopt_dir) { 492 case SOPT_GET: 493 switch (sopt->sopt_name) { 494 case MRT6_INIT: 495 case MRT6_DONE: 496 case MRT6_ADD_MIF: 497 case MRT6_DEL_MIF: 498 case MRT6_ADD_MFC: 499 case MRT6_DEL_MFC: 500 case MRT6_PIM: 501 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 502 EOPNOTSUPP; 503 break; 504 case IPV6_CHECKSUM: 505 error = ip6_raw_ctloutput(so, sopt); 506 break; 507 default: 508 error = ip6_ctloutput(so, sopt); 509 break; 510 } 511 break; 512 513 case SOPT_SET: 514 switch (sopt->sopt_name) { 515 case MRT6_INIT: 516 case MRT6_DONE: 517 case MRT6_ADD_MIF: 518 case MRT6_DEL_MIF: 519 case MRT6_ADD_MFC: 520 case MRT6_DEL_MFC: 521 case MRT6_PIM: 522 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 523 EOPNOTSUPP; 524 break; 525 case IPV6_CHECKSUM: 526 error = ip6_raw_ctloutput(so, sopt); 527 break; 528 default: 529 error = ip6_ctloutput(so, sopt); 530 break; 531 } 532 break; 533 } 534 535 return (error); 536 } 537 538 static int 539 rip6_attach(struct socket *so, int proto, struct thread *td) 540 { 541 struct inpcb *inp; 542 struct icmp6_filter *filter; 543 int error; 544 545 inp = sotoinpcb(so); 546 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 547 error = priv_check(td, PRIV_NETINET_RAW); 548 if (error) 549 return error; 550 error = soreserve(so, rip_sendspace, rip_recvspace); 551 if (error) 552 return error; 553 MALLOC(filter, struct icmp6_filter *, 554 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 555 if (filter == NULL) 556 return ENOMEM; 557 INP_INFO_WLOCK(&ripcbinfo); 558 error = in_pcballoc(so, &ripcbinfo); 559 if (error) { 560 INP_INFO_WUNLOCK(&ripcbinfo); 561 FREE(filter, M_PCB); 562 return error; 563 } 564 inp = (struct inpcb *)so->so_pcb; 565 INP_INFO_WUNLOCK(&ripcbinfo); 566 inp->inp_vflag |= INP_IPV6; 567 inp->in6p_ip6_nxt = (long)proto; 568 inp->in6p_hops = -1; /* use kernel default */ 569 inp->in6p_cksum = -1; 570 inp->in6p_icmp6filt = filter; 571 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 572 INP_WUNLOCK(inp); 573 return 0; 574 } 575 576 static void 577 rip6_detach(struct socket *so) 578 { 579 struct inpcb *inp; 580 581 inp = sotoinpcb(so); 582 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 583 584 if (so == ip6_mrouter && ip6_mrouter_done) 585 ip6_mrouter_done(); 586 /* xxx: RSVP */ 587 INP_INFO_WLOCK(&ripcbinfo); 588 INP_WLOCK(inp); 589 if (inp->in6p_icmp6filt) { 590 FREE(inp->in6p_icmp6filt, M_PCB); 591 inp->in6p_icmp6filt = NULL; 592 } 593 in6_pcbdetach(inp); 594 in6_pcbfree(inp); 595 INP_INFO_WUNLOCK(&ripcbinfo); 596 } 597 598 /* XXXRW: This can't ever be called. */ 599 static void 600 rip6_abort(struct socket *so) 601 { 602 struct inpcb *inp; 603 604 inp = sotoinpcb(so); 605 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 606 607 soisdisconnected(so); 608 } 609 610 static void 611 rip6_close(struct socket *so) 612 { 613 struct inpcb *inp; 614 615 inp = sotoinpcb(so); 616 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 617 618 soisdisconnected(so); 619 } 620 621 static int 622 rip6_disconnect(struct socket *so) 623 { 624 struct inpcb *inp = sotoinpcb(so); 625 626 if ((so->so_state & SS_ISCONNECTED) == 0) 627 return ENOTCONN; 628 inp->in6p_faddr = in6addr_any; 629 rip6_abort(so); 630 return (0); 631 } 632 633 static int 634 rip6_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 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 642 if (nam->sa_len != sizeof(*addr)) 643 return EINVAL; 644 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 645 return EADDRNOTAVAIL; 646 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 647 return(error); 648 649 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 650 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 651 return EADDRNOTAVAIL; 652 if (ia && 653 ((struct in6_ifaddr *)ia)->ia6_flags & 654 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 655 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 656 return (EADDRNOTAVAIL); 657 } 658 INP_INFO_WLOCK(&ripcbinfo); 659 INP_WLOCK(inp); 660 inp->in6p_laddr = addr->sin6_addr; 661 INP_WUNLOCK(inp); 662 INP_INFO_WUNLOCK(&ripcbinfo); 663 return 0; 664 } 665 666 static int 667 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 668 { 669 struct inpcb *inp = sotoinpcb(so); 670 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 671 struct in6_addr *in6a = NULL; 672 struct ifnet *ifp = NULL; 673 int error = 0, scope_ambiguous = 0; 674 675 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 676 if (nam->sa_len != sizeof(*addr)) 677 return EINVAL; 678 if (TAILQ_EMPTY(&ifnet)) 679 return EADDRNOTAVAIL; 680 if (addr->sin6_family != AF_INET6) 681 return EAFNOSUPPORT; 682 683 /* 684 * Application should provide a proper zone ID or the use of 685 * default zone IDs should be enabled. Unfortunately, some 686 * applications do not behave as it should, so we need a 687 * workaround. Even if an appropriate ID is not determined, 688 * we'll see if we can determine the outgoing interface. If we 689 * can, determine the zone ID based on the interface below. 690 */ 691 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 692 scope_ambiguous = 1; 693 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 694 return(error); 695 696 INP_INFO_WLOCK(&ripcbinfo); 697 INP_WLOCK(inp); 698 /* Source address selection. XXX: need pcblookup? */ 699 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 700 inp->in6p_moptions, NULL, 701 &inp->in6p_laddr, &ifp, &error); 702 if (in6a == NULL) { 703 INP_WUNLOCK(inp); 704 INP_INFO_WUNLOCK(&ripcbinfo); 705 return (error ? error : EADDRNOTAVAIL); 706 } 707 708 /* XXX: see above */ 709 if (ifp && scope_ambiguous && 710 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 711 INP_WUNLOCK(inp); 712 INP_INFO_WUNLOCK(&ripcbinfo); 713 return(error); 714 } 715 inp->in6p_faddr = addr->sin6_addr; 716 inp->in6p_laddr = *in6a; 717 soisconnected(so); 718 INP_WUNLOCK(inp); 719 INP_INFO_WUNLOCK(&ripcbinfo); 720 return 0; 721 } 722 723 static int 724 rip6_shutdown(struct socket *so) 725 { 726 struct inpcb *inp; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 730 INP_WLOCK(inp); 731 socantsendmore(so); 732 INP_WUNLOCK(inp); 733 return 0; 734 } 735 736 static int 737 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 738 struct mbuf *control, struct thread *td) 739 { 740 struct inpcb *inp = sotoinpcb(so); 741 struct sockaddr_in6 tmp; 742 struct sockaddr_in6 *dst; 743 int ret; 744 745 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 746 INP_INFO_WLOCK(&ripcbinfo); 747 /* always copy sockaddr to avoid overwrites */ 748 /* Unlocked read. */ 749 if (so->so_state & SS_ISCONNECTED) { 750 if (nam) { 751 INP_INFO_WUNLOCK(&ripcbinfo); 752 m_freem(m); 753 return EISCONN; 754 } 755 /* XXX */ 756 bzero(&tmp, sizeof(tmp)); 757 tmp.sin6_family = AF_INET6; 758 tmp.sin6_len = sizeof(struct sockaddr_in6); 759 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 760 sizeof(struct in6_addr)); 761 dst = &tmp; 762 } else { 763 if (nam == NULL) { 764 INP_INFO_WUNLOCK(&ripcbinfo); 765 m_freem(m); 766 return ENOTCONN; 767 } 768 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 769 INP_INFO_WUNLOCK(&ripcbinfo); 770 m_freem(m); 771 return(EINVAL); 772 } 773 tmp = *(struct sockaddr_in6 *)nam; 774 dst = &tmp; 775 776 if (dst->sin6_family == AF_UNSPEC) { 777 /* 778 * XXX: we allow this case for backward 779 * compatibility to buggy applications that 780 * rely on old (and wrong) kernel behavior. 781 */ 782 log(LOG_INFO, "rip6 SEND: address family is " 783 "unspec. Assume AF_INET6\n"); 784 dst->sin6_family = AF_INET6; 785 } else if (dst->sin6_family != AF_INET6) { 786 INP_INFO_WUNLOCK(&ripcbinfo); 787 m_freem(m); 788 return(EAFNOSUPPORT); 789 } 790 } 791 ret = rip6_output(m, so, dst, control); 792 INP_INFO_WUNLOCK(&ripcbinfo); 793 return (ret); 794 } 795 796 struct pr_usrreqs rip6_usrreqs = { 797 .pru_abort = rip6_abort, 798 .pru_attach = rip6_attach, 799 .pru_bind = rip6_bind, 800 .pru_connect = rip6_connect, 801 .pru_control = in6_control, 802 .pru_detach = rip6_detach, 803 .pru_disconnect = rip6_disconnect, 804 .pru_peeraddr = in6_getpeeraddr, 805 .pru_send = rip6_send, 806 .pru_shutdown = rip6_shutdown, 807 .pru_sockaddr = in6_getsockaddr, 808 .pru_close = rip6_close, 809 }; 810