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. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 60 */ 61 62 #include <sys/cdefs.h> 63 __FBSDID("$FreeBSD$"); 64 65 #include "opt_ipsec.h" 66 #include "opt_inet6.h" 67 68 #include <sys/param.h> 69 #include <sys/errno.h> 70 #include <sys/lock.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/priv.h> 74 #include <sys/proc.h> 75 #include <sys/protosw.h> 76 #include <sys/signalvar.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/sx.h> 80 #include <sys/syslog.h> 81 #include <sys/vimage.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/icmp6.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/ip6.h> 93 #include <netinet6/ip6protosw.h> 94 #include <netinet6/ip6_mroute.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/nd6.h> 98 #include <netinet6/raw_ip6.h> 99 #include <netinet6/scope6_var.h> 100 101 #ifdef IPSEC 102 #include <netipsec/ipsec.h> 103 #include <netipsec/ipsec6.h> 104 #endif /* IPSEC */ 105 106 #include <machine/stdarg.h> 107 108 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 109 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 110 111 /* 112 * Raw interface to IP6 protocol. 113 */ 114 115 extern struct inpcbhead ripcb; 116 extern struct inpcbinfo ripcbinfo; 117 extern u_long rip_sendspace; 118 extern u_long rip_recvspace; 119 120 struct rip6stat rip6stat; 121 122 /* 123 * Hooks for multicast forwarding. 124 */ 125 struct socket *ip6_mrouter = NULL; 126 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 127 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 128 int (*ip6_mrouter_done)(void); 129 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 130 int (*mrt6_ioctl)(int, caddr_t); 131 132 /* 133 * Setup generic address and protocol structures for raw_input routine, then 134 * pass them along with mbuf chain. 135 */ 136 int 137 rip6_input(struct mbuf **mp, int *offp, int proto) 138 { 139 struct mbuf *m = *mp; 140 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141 register struct inpcb *in6p; 142 struct inpcb *last = 0; 143 struct mbuf *opts = NULL; 144 struct sockaddr_in6 fromsa; 145 146 V_rip6stat.rip6s_ipackets++; 147 148 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 149 /* XXX Send icmp6 host/port unreach? */ 150 m_freem(m); 151 return (IPPROTO_DONE); 152 } 153 154 init_sin6(&fromsa, m); /* general init */ 155 156 INP_INFO_RLOCK(&V_ripcbinfo); 157 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 158 if ((in6p->in6p_vflag & INP_IPV6) == 0) 159 continue; 160 if (in6p->in6p_ip6_nxt && 161 in6p->in6p_ip6_nxt != proto) 162 continue; 163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 165 continue; 166 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 167 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 168 continue; 169 INP_RLOCK(in6p); 170 if (in6p->in6p_cksum != -1) { 171 V_rip6stat.rip6s_isum++; 172 if (in6_cksum(m, proto, *offp, 173 m->m_pkthdr.len - *offp)) { 174 INP_RUNLOCK(in6p); 175 V_rip6stat.rip6s_badsum++; 176 continue; 177 } 178 } 179 if (last) { 180 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 181 182 #ifdef IPSEC 183 /* 184 * Check AH/ESP integrity. 185 */ 186 if (n && ipsec6_in_reject(n, last)) { 187 m_freem(n); 188 V_ipsec6stat.in_polvio++; 189 /* Do not inject data into pcb. */ 190 } else 191 #endif /* 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 V_rip6stat.rip6s_fullsock++; 205 } else 206 sorwakeup(last->in6p_socket); 207 opts = NULL; 208 } 209 INP_RUNLOCK(last); 210 } 211 last = in6p; 212 } 213 INP_INFO_RUNLOCK(&V_ripcbinfo); 214 #ifdef IPSEC 215 /* 216 * Check AH/ESP integrity. 217 */ 218 if (last && ipsec6_in_reject(m, last)) { 219 m_freem(m); 220 V_ipsec6stat.in_polvio++; 221 V_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 V_rip6stat.rip6s_fullsock++; 238 } else 239 sorwakeup(last->in6p_socket); 240 INP_RUNLOCK(last); 241 } else { 242 V_rip6stat.rip6s_nosock++; 243 if (m->m_flags & M_MCAST) 244 V_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 V_ip6stat.ip6s_delivered--; 254 } 255 return (IPPROTO_DONE); 256 } 257 258 void 259 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 260 { 261 struct ip6_hdr *ip6; 262 struct mbuf *m; 263 int off = 0; 264 struct ip6ctlparam *ip6cp = NULL; 265 const struct sockaddr_in6 *sa6_src = NULL; 266 void *cmdarg; 267 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 268 269 if (sa->sa_family != AF_INET6 || 270 sa->sa_len != sizeof(struct sockaddr_in6)) 271 return; 272 273 if ((unsigned)cmd >= PRC_NCMDS) 274 return; 275 if (PRC_IS_REDIRECT(cmd)) 276 notify = in6_rtchange, d = NULL; 277 else if (cmd == PRC_HOSTDEAD) 278 d = NULL; 279 else if (inet6ctlerrmap[cmd] == 0) 280 return; 281 282 /* 283 * If the parameter is from icmp6, decode it. 284 */ 285 if (d != NULL) { 286 ip6cp = (struct ip6ctlparam *)d; 287 m = ip6cp->ip6c_m; 288 ip6 = ip6cp->ip6c_ip6; 289 off = ip6cp->ip6c_off; 290 cmdarg = ip6cp->ip6c_cmdarg; 291 sa6_src = ip6cp->ip6c_src; 292 } else { 293 m = NULL; 294 ip6 = NULL; 295 cmdarg = NULL; 296 sa6_src = &sa6_any; 297 } 298 299 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 300 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 301 } 302 303 /* 304 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 305 * 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 * 354 * XXX: we may still need to determine the zone later. 355 */ 356 if (!(so->so_state & SS_ISCONNECTED)) { 357 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 358 scope_ambiguous = 1; 359 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 360 goto bad; 361 } 362 363 /* 364 * For an ICMPv6 packet, we should know its type and code to update 365 * statistics. 366 */ 367 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 368 struct icmp6_hdr *icmp6; 369 if (m->m_len < sizeof(struct icmp6_hdr) && 370 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 371 error = ENOBUFS; 372 goto bad; 373 } 374 icmp6 = mtod(m, struct icmp6_hdr *); 375 type = icmp6->icmp6_type; 376 code = icmp6->icmp6_code; 377 } 378 379 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 380 if (m == NULL) { 381 error = ENOBUFS; 382 goto bad; 383 } 384 ip6 = mtod(m, struct ip6_hdr *); 385 386 /* 387 * Source address selection. 388 */ 389 if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 390 &oifp, &error)) == NULL) { 391 if (error == 0) 392 error = EADDRNOTAVAIL; 393 goto bad; 394 } 395 ip6->ip6_src = *in6a; 396 397 if (oifp && scope_ambiguous) { 398 /* 399 * Application should provide a proper zone ID or the use of 400 * default zone IDs should be enabled. Unfortunately, some 401 * applications do not behave as it should, so we need a 402 * workaround. Even if an appropriate ID is not determined 403 * (when it's required), if we can determine the outgoing 404 * interface. determine the zone ID based on the interface. 405 */ 406 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 407 if (error != 0) 408 goto bad; 409 } 410 ip6->ip6_dst = dstsock->sin6_addr; 411 412 /* 413 * Fill in the rest of the IPv6 header fields. 414 */ 415 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 416 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 417 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 418 (IPV6_VERSION & IPV6_VERSION_MASK); 419 420 /* 421 * ip6_plen will be filled in ip6_output, so not fill it here. 422 */ 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 V_icmp6stat.icp6s_outhist[type]++; 460 } else 461 V_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_WUNLOCK(in6p); 475 return (error); 476 } 477 478 /* 479 * Raw IPv6 socket option processing. 480 */ 481 int 482 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 483 { 484 int error; 485 486 if (sopt->sopt_level == IPPROTO_ICMPV6) 487 /* 488 * XXX: is it better to call icmp6_ctloutput() directly 489 * from protosw? 490 */ 491 return (icmp6_ctloutput(so, sopt)); 492 else if (sopt->sopt_level != IPPROTO_IPV6) 493 return (EINVAL); 494 495 error = 0; 496 497 switch (sopt->sopt_dir) { 498 case SOPT_GET: 499 switch (sopt->sopt_name) { 500 case MRT6_INIT: 501 case MRT6_DONE: 502 case MRT6_ADD_MIF: 503 case MRT6_DEL_MIF: 504 case MRT6_ADD_MFC: 505 case MRT6_DEL_MFC: 506 case MRT6_PIM: 507 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 508 EOPNOTSUPP; 509 break; 510 case IPV6_CHECKSUM: 511 error = ip6_raw_ctloutput(so, sopt); 512 break; 513 default: 514 error = ip6_ctloutput(so, sopt); 515 break; 516 } 517 break; 518 519 case SOPT_SET: 520 switch (sopt->sopt_name) { 521 case MRT6_INIT: 522 case MRT6_DONE: 523 case MRT6_ADD_MIF: 524 case MRT6_DEL_MIF: 525 case MRT6_ADD_MFC: 526 case MRT6_DEL_MFC: 527 case MRT6_PIM: 528 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 529 EOPNOTSUPP; 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 } 543 544 static int 545 rip6_attach(struct socket *so, int proto, struct thread *td) 546 { 547 struct inpcb *inp; 548 struct icmp6_filter *filter; 549 int error; 550 551 inp = sotoinpcb(so); 552 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 553 554 error = priv_check(td, PRIV_NETINET_RAW); 555 if (error) 556 return (error); 557 error = soreserve(so, rip_sendspace, rip_recvspace); 558 if (error) 559 return (error); 560 MALLOC(filter, struct icmp6_filter *, 561 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 562 if (filter == NULL) 563 return (ENOMEM); 564 INP_INFO_WLOCK(&V_ripcbinfo); 565 error = in_pcballoc(so, &V_ripcbinfo); 566 if (error) { 567 INP_INFO_WUNLOCK(&V_ripcbinfo); 568 FREE(filter, M_PCB); 569 return (error); 570 } 571 inp = (struct inpcb *)so->so_pcb; 572 INP_INFO_WUNLOCK(&V_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_WUNLOCK(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")); 590 591 if (so == ip6_mrouter && ip6_mrouter_done) 592 ip6_mrouter_done(); 593 /* xxx: RSVP */ 594 INP_INFO_WLOCK(&V_ripcbinfo); 595 INP_WLOCK(inp); 596 FREE(inp->in6p_icmp6filt, M_PCB); 597 in6_pcbdetach(inp); 598 in6_pcbfree(inp); 599 INP_INFO_WUNLOCK(&V_ripcbinfo); 600 } 601 602 /* XXXRW: This can't ever be called. */ 603 static void 604 rip6_abort(struct socket *so) 605 { 606 struct inpcb *inp; 607 608 inp = sotoinpcb(so); 609 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 610 611 soisdisconnected(so); 612 } 613 614 static void 615 rip6_close(struct socket *so) 616 { 617 struct inpcb *inp; 618 619 inp = sotoinpcb(so); 620 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 621 622 soisdisconnected(so); 623 } 624 625 static int 626 rip6_disconnect(struct socket *so) 627 { 628 struct inpcb *inp; 629 630 inp = sotoinpcb(so); 631 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 632 633 if ((so->so_state & SS_ISCONNECTED) == 0) 634 return (ENOTCONN); 635 inp->in6p_faddr = in6addr_any; 636 rip6_abort(so); 637 return (0); 638 } 639 640 static int 641 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 642 { 643 struct inpcb *inp; 644 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 645 struct ifaddr *ia = NULL; 646 int error = 0; 647 648 inp = sotoinpcb(so); 649 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 650 651 if (nam->sa_len != sizeof(*addr)) 652 return (EINVAL); 653 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 654 return (EADDRNOTAVAIL); 655 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 656 return (error); 657 658 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 659 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 660 return (EADDRNOTAVAIL); 661 if (ia && 662 ((struct in6_ifaddr *)ia)->ia6_flags & 663 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 664 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 665 return (EADDRNOTAVAIL); 666 } 667 INP_INFO_WLOCK(&V_ripcbinfo); 668 INP_WLOCK(inp); 669 inp->in6p_laddr = addr->sin6_addr; 670 INP_WUNLOCK(inp); 671 INP_INFO_WUNLOCK(&V_ripcbinfo); 672 return (0); 673 } 674 675 static int 676 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 677 { 678 struct inpcb *inp; 679 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 680 struct in6_addr *in6a = NULL; 681 struct ifnet *ifp = NULL; 682 int error = 0, scope_ambiguous = 0; 683 684 inp = sotoinpcb(so); 685 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 686 687 if (nam->sa_len != sizeof(*addr)) 688 return (EINVAL); 689 if (TAILQ_EMPTY(&V_ifnet)) 690 return (EADDRNOTAVAIL); 691 if (addr->sin6_family != AF_INET6) 692 return (EAFNOSUPPORT); 693 694 /* 695 * Application should provide a proper zone ID or the use of default 696 * zone IDs should be enabled. Unfortunately, some applications do 697 * not behave as it should, so we need a workaround. Even if an 698 * appropriate ID is not determined, we'll see if we can determine 699 * the outgoing interface. If we can, determine the zone ID based on 700 * the interface below. 701 */ 702 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 703 scope_ambiguous = 1; 704 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 705 return (error); 706 707 INP_INFO_WLOCK(&V_ripcbinfo); 708 INP_WLOCK(inp); 709 /* Source address selection. XXX: need pcblookup? */ 710 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 711 inp, NULL, so->so_cred, 712 &ifp, &error); 713 if (in6a == NULL) { 714 INP_WUNLOCK(inp); 715 INP_INFO_WUNLOCK(&V_ripcbinfo); 716 return (error ? error : EADDRNOTAVAIL); 717 } 718 719 /* XXX: see above */ 720 if (ifp && scope_ambiguous && 721 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 722 INP_WUNLOCK(inp); 723 INP_INFO_WUNLOCK(&V_ripcbinfo); 724 return (error); 725 } 726 inp->in6p_faddr = addr->sin6_addr; 727 inp->in6p_laddr = *in6a; 728 soisconnected(so); 729 INP_WUNLOCK(inp); 730 INP_INFO_WUNLOCK(&V_ripcbinfo); 731 return (0); 732 } 733 734 static int 735 rip6_shutdown(struct socket *so) 736 { 737 struct inpcb *inp; 738 739 inp = sotoinpcb(so); 740 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 741 742 INP_WLOCK(inp); 743 socantsendmore(so); 744 INP_WUNLOCK(inp); 745 return (0); 746 } 747 748 static int 749 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 750 struct mbuf *control, struct thread *td) 751 { 752 struct inpcb *inp; 753 struct sockaddr_in6 tmp; 754 struct sockaddr_in6 *dst; 755 int ret; 756 757 inp = sotoinpcb(so); 758 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 759 760 /* Always copy sockaddr to avoid overwrites. */ 761 /* Unlocked read. */ 762 if (so->so_state & SS_ISCONNECTED) { 763 if (nam) { 764 m_freem(m); 765 return (EISCONN); 766 } 767 /* XXX */ 768 bzero(&tmp, sizeof(tmp)); 769 tmp.sin6_family = AF_INET6; 770 tmp.sin6_len = sizeof(struct sockaddr_in6); 771 INP_RLOCK(inp); 772 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 773 sizeof(struct in6_addr)); 774 INP_RUNLOCK(inp); 775 dst = &tmp; 776 } else { 777 if (nam == NULL) { 778 m_freem(m); 779 return (ENOTCONN); 780 } 781 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 782 m_freem(m); 783 return (EINVAL); 784 } 785 tmp = *(struct sockaddr_in6 *)nam; 786 dst = &tmp; 787 788 if (dst->sin6_family == AF_UNSPEC) { 789 /* 790 * XXX: we allow this case for backward 791 * compatibility to buggy applications that 792 * rely on old (and wrong) kernel behavior. 793 */ 794 log(LOG_INFO, "rip6 SEND: address family is " 795 "unspec. Assume AF_INET6\n"); 796 dst->sin6_family = AF_INET6; 797 } else if (dst->sin6_family != AF_INET6) { 798 m_freem(m); 799 return(EAFNOSUPPORT); 800 } 801 } 802 ret = rip6_output(m, so, dst, control); 803 return (ret); 804 } 805 806 struct pr_usrreqs rip6_usrreqs = { 807 .pru_abort = rip6_abort, 808 .pru_attach = rip6_attach, 809 .pru_bind = rip6_bind, 810 .pru_connect = rip6_connect, 811 .pru_control = in6_control, 812 .pru_detach = rip6_detach, 813 .pru_disconnect = rip6_disconnect, 814 .pru_peeraddr = in6_getpeeraddr, 815 .pru_send = rip6_send, 816 .pru_shutdown = rip6_shutdown, 817 .pru_sockaddr = in6_getsockaddr, 818 .pru_close = rip6_close, 819 }; 820