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. 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 82 #include <net/if.h> 83 #include <net/if_types.h> 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/icmp6.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/ip6.h> 92 #include <netinet6/ip6protosw.h> 93 #include <netinet6/ip6_mroute.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet6/nd6.h> 97 #include <netinet6/raw_ip6.h> 98 #include <netinet6/scope6_var.h> 99 100 #ifdef IPSEC 101 #include <netipsec/ipsec.h> 102 #include <netipsec/ipsec6.h> 103 #endif /* IPSEC */ 104 105 #include <machine/stdarg.h> 106 107 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 108 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 109 110 /* 111 * Raw interface to IP6 protocol. 112 */ 113 114 extern struct inpcbhead ripcb; 115 extern struct inpcbinfo ripcbinfo; 116 extern u_long rip_sendspace; 117 extern u_long rip_recvspace; 118 119 struct rip6stat rip6stat; 120 121 /* 122 * Hooks for multicast forwarding. 123 */ 124 struct socket *ip6_mrouter = NULL; 125 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 126 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 127 int (*ip6_mrouter_done)(void); 128 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 129 int (*mrt6_ioctl)(int, caddr_t); 130 131 /* 132 * Setup generic address and protocol structures for raw_input routine, then 133 * pass them along with 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 if ((in6p->in6p_vflag & INP_IPV6) == 0) 158 continue; 159 if (in6p->in6p_ip6_nxt && 160 in6p->in6p_ip6_nxt != proto) 161 continue; 162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 164 continue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 167 continue; 168 INP_RLOCK(in6p); 169 if (in6p->in6p_cksum != -1) { 170 rip6stat.rip6s_isum++; 171 if (in6_cksum(m, proto, *offp, 172 m->m_pkthdr.len - *offp)) { 173 INP_RUNLOCK(in6p); 174 rip6stat.rip6s_badsum++; 175 continue; 176 } 177 } 178 if (last) { 179 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 180 181 #ifdef IPSEC 182 /* 183 * Check AH/ESP integrity. 184 */ 185 if (n && ipsec6_in_reject(n, last)) { 186 m_freem(n); 187 ipsec6stat.in_polvio++; 188 /* Do not inject data into pcb. */ 189 } else 190 #endif /* 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_RUNLOCK(last); 209 } 210 last = in6p; 211 } 212 INP_INFO_RUNLOCK(&ripcbinfo); 213 #ifdef IPSEC 214 /* 215 * Check AH/ESP integrity. 216 */ 217 if (last && ipsec6_in_reject(m, last)) { 218 m_freem(m); 219 ipsec6stat.in_polvio++; 220 ip6stat.ip6s_delivered--; 221 /* Do not inject data into pcb. */ 222 INP_RUNLOCK(last); 223 } else 224 #endif /* 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_RUNLOCK(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 return (IPPROTO_DONE); 255 } 256 257 void 258 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 259 { 260 struct ip6_hdr *ip6; 261 struct mbuf *m; 262 int off = 0; 263 struct ip6ctlparam *ip6cp = NULL; 264 const struct sockaddr_in6 *sa6_src = NULL; 265 void *cmdarg; 266 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 267 268 if (sa->sa_family != AF_INET6 || 269 sa->sa_len != sizeof(struct sockaddr_in6)) 270 return; 271 272 if ((unsigned)cmd >= PRC_NCMDS) 273 return; 274 if (PRC_IS_REDIRECT(cmd)) 275 notify = in6_rtchange, d = NULL; 276 else if (cmd == PRC_HOSTDEAD) 277 d = NULL; 278 else if (inet6ctlerrmap[cmd] == 0) 279 return; 280 281 /* 282 * If the parameter is from icmp6, decode it. 283 */ 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, 0, cmd, cmdarg, notify); 300 } 301 302 /* 303 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 304 * may have setup with control call. 305 */ 306 int 307 #if __STDC__ 308 rip6_output(struct mbuf *m, ...) 309 #else 310 rip6_output(m, va_alist) 311 struct mbuf *m; 312 va_dcl 313 #endif 314 { 315 struct mbuf *control; 316 struct socket *so; 317 struct sockaddr_in6 *dstsock; 318 struct in6_addr *dst; 319 struct ip6_hdr *ip6; 320 struct inpcb *in6p; 321 u_int plen = m->m_pkthdr.len; 322 int error = 0; 323 struct ip6_pktopts opt, *optp; 324 struct ifnet *oifp = NULL; 325 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 326 int scope_ambiguous = 0; 327 struct in6_addr *in6a; 328 va_list ap; 329 330 va_start(ap, m); 331 so = va_arg(ap, struct socket *); 332 dstsock = va_arg(ap, struct sockaddr_in6 *); 333 control = va_arg(ap, struct mbuf *); 334 va_end(ap); 335 336 in6p = sotoin6pcb(so); 337 INP_WLOCK(in6p); 338 339 dst = &dstsock->sin6_addr; 340 if (control) { 341 if ((error = ip6_setpktopts(control, &opt, 342 in6p->in6p_outputopts, so->so_cred, 343 so->so_proto->pr_protocol)) != 0) { 344 goto bad; 345 } 346 optp = &opt; 347 } else 348 optp = in6p->in6p_outputopts; 349 350 /* 351 * Check and convert scope zone ID into internal form. 352 * 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 to update 364 * 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, NULL, so->so_cred, 389 &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 /* 412 * Fill in the rest of the IPv6 header fields. 413 */ 414 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 415 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 416 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 417 (IPV6_VERSION & IPV6_VERSION_MASK); 418 419 /* 420 * ip6_plen will be filled in ip6_output, so not fill it here. 421 */ 422 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 423 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 424 425 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 426 in6p->in6p_cksum != -1) { 427 struct mbuf *n; 428 int off; 429 u_int16_t *p; 430 431 /* Compute checksum. */ 432 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 433 off = offsetof(struct icmp6_hdr, icmp6_cksum); 434 else 435 off = in6p->in6p_cksum; 436 if (plen < off + 1) { 437 error = EINVAL; 438 goto bad; 439 } 440 off += sizeof(struct ip6_hdr); 441 442 n = m; 443 while (n && n->m_len <= off) { 444 off -= n->m_len; 445 n = n->m_next; 446 } 447 if (!n) 448 goto bad; 449 p = (u_int16_t *)(mtod(n, caddr_t) + off); 450 *p = 0; 451 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 452 } 453 454 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 455 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 456 if (oifp) 457 icmp6_ifoutstat_inc(oifp, type, code); 458 icmp6stat.icp6s_outhist[type]++; 459 } else 460 rip6stat.rip6s_opackets++; 461 462 goto freectl; 463 464 bad: 465 if (m) 466 m_freem(m); 467 468 freectl: 469 if (control) { 470 ip6_clearpktopts(&opt, -1); 471 m_freem(control); 472 } 473 INP_WUNLOCK(in6p); 474 return (error); 475 } 476 477 /* 478 * Raw IPv6 socket option processing. 479 */ 480 int 481 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 482 { 483 int error; 484 485 if (sopt->sopt_level == IPPROTO_ICMPV6) 486 /* 487 * XXX: is it better to call icmp6_ctloutput() directly 488 * from protosw? 489 */ 490 return (icmp6_ctloutput(so, sopt)); 491 else if (sopt->sopt_level != IPPROTO_IPV6) 492 return (EINVAL); 493 494 error = 0; 495 496 switch (sopt->sopt_dir) { 497 case SOPT_GET: 498 switch (sopt->sopt_name) { 499 case MRT6_INIT: 500 case MRT6_DONE: 501 case MRT6_ADD_MIF: 502 case MRT6_DEL_MIF: 503 case MRT6_ADD_MFC: 504 case MRT6_DEL_MFC: 505 case MRT6_PIM: 506 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 507 EOPNOTSUPP; 508 break; 509 case IPV6_CHECKSUM: 510 error = ip6_raw_ctloutput(so, sopt); 511 break; 512 default: 513 error = ip6_ctloutput(so, sopt); 514 break; 515 } 516 break; 517 518 case SOPT_SET: 519 switch (sopt->sopt_name) { 520 case MRT6_INIT: 521 case MRT6_DONE: 522 case MRT6_ADD_MIF: 523 case MRT6_DEL_MIF: 524 case MRT6_ADD_MFC: 525 case MRT6_DEL_MFC: 526 case MRT6_PIM: 527 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 528 EOPNOTSUPP; 529 break; 530 case IPV6_CHECKSUM: 531 error = ip6_raw_ctloutput(so, sopt); 532 break; 533 default: 534 error = ip6_ctloutput(so, sopt); 535 break; 536 } 537 break; 538 } 539 540 return (error); 541 } 542 543 static int 544 rip6_attach(struct socket *so, int proto, struct thread *td) 545 { 546 struct inpcb *inp; 547 struct icmp6_filter *filter; 548 int error; 549 550 inp = sotoinpcb(so); 551 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 552 553 error = priv_check(td, PRIV_NETINET_RAW); 554 if (error) 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); 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_INFO_WUNLOCK(&ripcbinfo); 572 inp->inp_vflag |= INP_IPV6; 573 inp->in6p_ip6_nxt = (long)proto; 574 inp->in6p_hops = -1; /* use kernel default */ 575 inp->in6p_cksum = -1; 576 inp->in6p_icmp6filt = filter; 577 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 578 INP_WUNLOCK(inp); 579 return (0); 580 } 581 582 static void 583 rip6_detach(struct socket *so) 584 { 585 struct inpcb *inp; 586 587 inp = sotoinpcb(so); 588 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 589 590 if (so == ip6_mrouter && ip6_mrouter_done) 591 ip6_mrouter_done(); 592 /* xxx: RSVP */ 593 INP_INFO_WLOCK(&ripcbinfo); 594 INP_WLOCK(inp); 595 FREE(inp->in6p_icmp6filt, M_PCB); 596 in6_pcbdetach(inp); 597 in6_pcbfree(inp); 598 INP_INFO_WUNLOCK(&ripcbinfo); 599 } 600 601 /* XXXRW: This can't ever be called. */ 602 static void 603 rip6_abort(struct socket *so) 604 { 605 struct inpcb *inp; 606 607 inp = sotoinpcb(so); 608 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 609 610 soisdisconnected(so); 611 } 612 613 static void 614 rip6_close(struct socket *so) 615 { 616 struct inpcb *inp; 617 618 inp = sotoinpcb(so); 619 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 620 621 soisdisconnected(so); 622 } 623 624 static int 625 rip6_disconnect(struct socket *so) 626 { 627 struct inpcb *inp; 628 629 inp = sotoinpcb(so); 630 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 631 632 if ((so->so_state & SS_ISCONNECTED) == 0) 633 return (ENOTCONN); 634 inp->in6p_faddr = in6addr_any; 635 rip6_abort(so); 636 return (0); 637 } 638 639 static int 640 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 641 { 642 struct inpcb *inp; 643 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 644 struct ifaddr *ia = NULL; 645 int error = 0; 646 647 inp = sotoinpcb(so); 648 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 649 650 if (nam->sa_len != sizeof(*addr)) 651 return (EINVAL); 652 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 653 return (EADDRNOTAVAIL); 654 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 655 return (error); 656 657 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 658 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 659 return (EADDRNOTAVAIL); 660 if (ia && 661 ((struct in6_ifaddr *)ia)->ia6_flags & 662 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 663 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 664 return (EADDRNOTAVAIL); 665 } 666 INP_INFO_WLOCK(&ripcbinfo); 667 INP_WLOCK(inp); 668 inp->in6p_laddr = addr->sin6_addr; 669 INP_WUNLOCK(inp); 670 INP_INFO_WUNLOCK(&ripcbinfo); 671 return (0); 672 } 673 674 static int 675 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 676 { 677 struct inpcb *inp; 678 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 679 struct in6_addr *in6a = NULL; 680 struct ifnet *ifp = NULL; 681 int error = 0, scope_ambiguous = 0; 682 683 inp = sotoinpcb(so); 684 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 685 686 if (nam->sa_len != sizeof(*addr)) 687 return (EINVAL); 688 if (TAILQ_EMPTY(&ifnet)) 689 return (EADDRNOTAVAIL); 690 if (addr->sin6_family != AF_INET6) 691 return (EAFNOSUPPORT); 692 693 /* 694 * Application should provide a proper zone ID or the use of default 695 * zone IDs should be enabled. Unfortunately, some applications do 696 * not behave as it should, so we need a workaround. Even if an 697 * appropriate ID is not determined, we'll see if we can determine 698 * the outgoing interface. If we can, determine the zone ID based on 699 * the interface below. 700 */ 701 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 702 scope_ambiguous = 1; 703 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 704 return (error); 705 706 INP_INFO_WLOCK(&ripcbinfo); 707 INP_WLOCK(inp); 708 /* Source address selection. XXX: need pcblookup? */ 709 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 710 inp, NULL, so->so_cred, 711 &ifp, &error); 712 if (in6a == NULL) { 713 INP_WUNLOCK(inp); 714 INP_INFO_WUNLOCK(&ripcbinfo); 715 return (error ? error : EADDRNOTAVAIL); 716 } 717 718 /* XXX: see above */ 719 if (ifp && scope_ambiguous && 720 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 721 INP_WUNLOCK(inp); 722 INP_INFO_WUNLOCK(&ripcbinfo); 723 return (error); 724 } 725 inp->in6p_faddr = addr->sin6_addr; 726 inp->in6p_laddr = *in6a; 727 soisconnected(so); 728 INP_WUNLOCK(inp); 729 INP_INFO_WUNLOCK(&ripcbinfo); 730 return (0); 731 } 732 733 static int 734 rip6_shutdown(struct socket *so) 735 { 736 struct inpcb *inp; 737 738 inp = sotoinpcb(so); 739 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 740 741 INP_WLOCK(inp); 742 socantsendmore(so); 743 INP_WUNLOCK(inp); 744 return (0); 745 } 746 747 static int 748 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 749 struct mbuf *control, struct thread *td) 750 { 751 struct inpcb *inp; 752 struct sockaddr_in6 tmp; 753 struct sockaddr_in6 *dst; 754 int ret; 755 756 inp = sotoinpcb(so); 757 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 758 759 /* Always copy sockaddr to avoid overwrites. */ 760 /* Unlocked read. */ 761 if (so->so_state & SS_ISCONNECTED) { 762 if (nam) { 763 m_freem(m); 764 return (EISCONN); 765 } 766 /* XXX */ 767 bzero(&tmp, sizeof(tmp)); 768 tmp.sin6_family = AF_INET6; 769 tmp.sin6_len = sizeof(struct sockaddr_in6); 770 INP_RLOCK(inp); 771 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 772 sizeof(struct in6_addr)); 773 INP_RUNLOCK(inp); 774 dst = &tmp; 775 } else { 776 if (nam == NULL) { 777 m_freem(m); 778 return (ENOTCONN); 779 } 780 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 781 m_freem(m); 782 return (EINVAL); 783 } 784 tmp = *(struct sockaddr_in6 *)nam; 785 dst = &tmp; 786 787 if (dst->sin6_family == AF_UNSPEC) { 788 /* 789 * XXX: we allow this case for backward 790 * compatibility to buggy applications that 791 * rely on old (and wrong) kernel behavior. 792 */ 793 log(LOG_INFO, "rip6 SEND: address family is " 794 "unspec. Assume AF_INET6\n"); 795 dst->sin6_family = AF_INET6; 796 } else if (dst->sin6_family != AF_INET6) { 797 m_freem(m); 798 return(EAFNOSUPPORT); 799 } 800 } 801 ret = rip6_output(m, so, dst, control); 802 return (ret); 803 } 804 805 struct pr_usrreqs rip6_usrreqs = { 806 .pru_abort = rip6_abort, 807 .pru_attach = rip6_attach, 808 .pru_bind = rip6_bind, 809 .pru_connect = rip6_connect, 810 .pru_control = in6_control, 811 .pru_detach = rip6_detach, 812 .pru_disconnect = rip6_disconnect, 813 .pru_peeraddr = in6_getpeeraddr, 814 .pru_send = rip6_send, 815 .pru_shutdown = rip6_shutdown, 816 .pru_sockaddr = in6_getsockaddr, 817 .pru_close = rip6_close, 818 };
Cache object: f070c7641b69fa53b73906f6d9861856
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