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 * $FreeBSD$ 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/priv.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/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 <netipsec/ipsec.h> 100 #include <netipsec/ipsec6.h> 101 #endif /* IPSEC */ 102 103 #include <machine/stdarg.h> 104 105 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 106 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 107 108 /* 109 * Raw interface to IP6 protocol. 110 */ 111 112 extern struct inpcbhead ripcb; 113 extern struct inpcbinfo ripcbinfo; 114 extern u_long rip_sendspace; 115 extern u_long rip_recvspace; 116 117 struct rip6stat rip6stat; 118 119 /* 120 * Hooks for multicast forwarding. 121 */ 122 struct socket *ip6_mrouter = NULL; 123 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 124 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 125 int (*ip6_mrouter_done)(void); 126 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 127 int (*mrt6_ioctl)(int, caddr_t); 128 129 /* 130 * Setup generic address and protocol structures 131 * for raw_input routine, then pass them along with 132 * mbuf chain. 133 */ 134 int 135 rip6_input(struct mbuf **mp, int *offp, int proto) 136 { 137 struct mbuf *m = *mp; 138 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 139 register struct inpcb *in6p; 140 struct inpcb *last = 0; 141 struct mbuf *opts = NULL; 142 struct sockaddr_in6 fromsa; 143 144 rip6stat.rip6s_ipackets++; 145 146 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 147 /* XXX send icmp6 host/port unreach? */ 148 m_freem(m); 149 return IPPROTO_DONE; 150 } 151 152 init_sin6(&fromsa, m); /* general init */ 153 154 INP_INFO_RLOCK(&ripcbinfo); 155 LIST_FOREACH(in6p, &ripcb, inp_list) { 156 INP_LOCK(in6p); 157 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 158 docontinue: 159 INP_UNLOCK(in6p); 160 continue; 161 } 162 if (in6p->in6p_ip6_nxt && 163 in6p->in6p_ip6_nxt != proto) 164 goto docontinue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 167 goto docontinue; 168 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 169 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 170 goto docontinue; 171 if (in6p->in6p_cksum != -1) { 172 rip6stat.rip6s_isum++; 173 if (in6_cksum(m, proto, *offp, 174 m->m_pkthdr.len - *offp)) { 175 rip6stat.rip6s_badsum++; 176 goto docontinue; 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 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 rip6stat.rip6s_fullsock++; 205 } else 206 sorwakeup(last->in6p_socket); 207 opts = NULL; 208 } 209 INP_UNLOCK(last); 210 } 211 last = in6p; 212 } 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_UNLOCK(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_UNLOCK(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 INP_INFO_RUNLOCK(&ripcbinfo); 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) __P((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 /* if the parameter is from icmp6, decode it. */ 283 if (d != NULL) { 284 ip6cp = (struct ip6ctlparam *)d; 285 m = ip6cp->ip6c_m; 286 ip6 = ip6cp->ip6c_ip6; 287 off = ip6cp->ip6c_off; 288 cmdarg = ip6cp->ip6c_cmdarg; 289 sa6_src = ip6cp->ip6c_src; 290 } else { 291 m = NULL; 292 ip6 = NULL; 293 cmdarg = NULL; 294 sa6_src = &sa6_any; 295 } 296 297 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 298 (const struct sockaddr *)sa6_src, 299 0, cmd, cmdarg, notify); 300 } 301 302 /* 303 * Generate IPv6 header and pass packet to ip6_output. 304 * Tack on options user 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 priv = 0; 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_LOCK(in6p); 339 340 priv = 0; 341 if (suser_cred(so->so_cred, 0) == 0) 342 priv = 1; 343 dst = &dstsock->sin6_addr; 344 if (control) { 345 if ((error = ip6_setpktopts(control, &opt, 346 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 347 != 0) { 348 goto bad; 349 } 350 optp = &opt; 351 } else 352 optp = in6p->in6p_outputopts; 353 354 /* 355 * Check and convert scope zone ID into internal form. 356 * XXX: we may still need to determine the zone later. 357 */ 358 if (!(so->so_state & SS_ISCONNECTED)) { 359 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 360 scope_ambiguous = 1; 361 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 362 goto bad; 363 } 364 365 /* 366 * For an ICMPv6 packet, we should know its type and code 367 * to update statistics. 368 */ 369 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 370 struct icmp6_hdr *icmp6; 371 if (m->m_len < sizeof(struct icmp6_hdr) && 372 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 373 error = ENOBUFS; 374 goto bad; 375 } 376 icmp6 = mtod(m, struct icmp6_hdr *); 377 type = icmp6->icmp6_type; 378 code = icmp6->icmp6_code; 379 } 380 381 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 382 if (m == NULL) { 383 error = ENOBUFS; 384 goto bad; 385 } 386 ip6 = mtod(m, struct ip6_hdr *); 387 388 /* 389 * Source address selection. 390 */ 391 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 392 &in6p->in6p_laddr, &oifp, &error)) == NULL) { 393 if (error == 0) 394 error = EADDRNOTAVAIL; 395 goto bad; 396 } 397 ip6->ip6_src = *in6a; 398 399 if (oifp && scope_ambiguous) { 400 /* 401 * Application should provide a proper zone ID or the use of 402 * default zone IDs should be enabled. Unfortunately, some 403 * applications do not behave as it should, so we need a 404 * workaround. Even if an appropriate ID is not determined 405 * (when it's required), if we can determine the outgoing 406 * interface. determine the zone ID based on the interface. 407 */ 408 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 409 if (error != 0) 410 goto bad; 411 } 412 ip6->ip6_dst = dstsock->sin6_addr; 413 414 /* fill in the rest of the IPv6 header fields */ 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 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 420 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 421 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 422 423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 424 in6p->in6p_cksum != -1) { 425 struct mbuf *n; 426 int off; 427 u_int16_t *p; 428 429 /* compute checksum */ 430 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 431 off = offsetof(struct icmp6_hdr, icmp6_cksum); 432 else 433 off = in6p->in6p_cksum; 434 if (plen < off + 1) { 435 error = EINVAL; 436 goto bad; 437 } 438 off += sizeof(struct ip6_hdr); 439 440 n = m; 441 while (n && n->m_len <= off) { 442 off -= n->m_len; 443 n = n->m_next; 444 } 445 if (!n) 446 goto bad; 447 p = (u_int16_t *)(mtod(n, caddr_t) + off); 448 *p = 0; 449 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 450 } 451 452 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 453 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 454 if (oifp) 455 icmp6_ifoutstat_inc(oifp, type, code); 456 icmp6stat.icp6s_outhist[type]++; 457 } else 458 rip6stat.rip6s_opackets++; 459 460 goto freectl; 461 462 bad: 463 if (m) 464 m_freem(m); 465 466 freectl: 467 if (control) { 468 ip6_clearpktopts(&opt, -1); 469 m_freem(control); 470 } 471 INP_UNLOCK(in6p); 472 return (error); 473 } 474 475 /* 476 * Raw IPv6 socket option processing. 477 */ 478 int 479 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 480 { 481 int error; 482 483 if (sopt->sopt_level == IPPROTO_ICMPV6) 484 /* 485 * XXX: is it better to call icmp6_ctloutput() directly 486 * from protosw? 487 */ 488 return (icmp6_ctloutput(so, sopt)); 489 else if (sopt->sopt_level != IPPROTO_IPV6) 490 return (EINVAL); 491 492 error = 0; 493 494 switch (sopt->sopt_dir) { 495 case SOPT_GET: 496 switch (sopt->sopt_name) { 497 case MRT6_INIT: 498 case MRT6_DONE: 499 case MRT6_ADD_MIF: 500 case MRT6_DEL_MIF: 501 case MRT6_ADD_MFC: 502 case MRT6_DEL_MFC: 503 case MRT6_PIM: 504 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 505 EOPNOTSUPP; 506 break; 507 case IPV6_CHECKSUM: 508 error = ip6_raw_ctloutput(so, sopt); 509 break; 510 default: 511 error = ip6_ctloutput(so, sopt); 512 break; 513 } 514 break; 515 516 case SOPT_SET: 517 switch (sopt->sopt_name) { 518 case MRT6_INIT: 519 case MRT6_DONE: 520 case MRT6_ADD_MIF: 521 case MRT6_DEL_MIF: 522 case MRT6_ADD_MFC: 523 case MRT6_DEL_MFC: 524 case MRT6_PIM: 525 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 526 EOPNOTSUPP; 527 break; 528 case IPV6_CHECKSUM: 529 error = ip6_raw_ctloutput(so, sopt); 530 break; 531 default: 532 error = ip6_ctloutput(so, sopt); 533 break; 534 } 535 break; 536 } 537 538 return (error); 539 } 540 541 static int 542 rip6_attach(struct socket *so, int proto, struct thread *td) 543 { 544 struct inpcb *inp; 545 struct icmp6_filter *filter; 546 int error; 547 548 inp = sotoinpcb(so); 549 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 550 if (td && (error = suser(td)) != 0) 551 return error; 552 error = soreserve(so, rip_sendspace, rip_recvspace); 553 if (error) 554 return error; 555 MALLOC(filter, struct icmp6_filter *, 556 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 557 if (filter == NULL) 558 return ENOMEM; 559 INP_INFO_WLOCK(&ripcbinfo); 560 error = in_pcballoc(so, &ripcbinfo); 561 if (error) { 562 INP_INFO_WUNLOCK(&ripcbinfo); 563 FREE(filter, M_PCB); 564 return error; 565 } 566 inp = (struct inpcb *)so->so_pcb; 567 INP_INFO_WUNLOCK(&ripcbinfo); 568 inp->inp_vflag |= INP_IPV6; 569 inp->in6p_ip6_nxt = (long)proto; 570 inp->in6p_hops = -1; /* use kernel default */ 571 inp->in6p_cksum = -1; 572 inp->in6p_icmp6filt = filter; 573 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 574 INP_UNLOCK(inp); 575 return 0; 576 } 577 578 static void 579 rip6_detach(struct socket *so) 580 { 581 struct inpcb *inp; 582 583 inp = sotoinpcb(so); 584 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 585 586 if (so == ip6_mrouter && ip6_mrouter_done) 587 ip6_mrouter_done(); 588 /* xxx: RSVP */ 589 INP_INFO_WLOCK(&ripcbinfo); 590 INP_LOCK(inp); 591 if (inp->in6p_icmp6filt) { 592 FREE(inp->in6p_icmp6filt, M_PCB); 593 inp->in6p_icmp6filt = NULL; 594 } 595 in6_pcbdetach(inp); 596 in6_pcbfree(inp); 597 INP_INFO_WUNLOCK(&ripcbinfo); 598 } 599 600 /* XXXRW: This can't ever be called. */ 601 static void 602 rip6_abort(struct socket *so) 603 { 604 struct inpcb *inp; 605 606 inp = sotoinpcb(so); 607 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 608 609 soisdisconnected(so); 610 } 611 612 static void 613 rip6_close(struct socket *so) 614 { 615 struct inpcb *inp; 616 617 inp = sotoinpcb(so); 618 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 619 620 soisdisconnected(so); 621 } 622 623 static int 624 rip6_disconnect(struct socket *so) 625 { 626 struct inpcb *inp = sotoinpcb(so); 627 628 if ((so->so_state & SS_ISCONNECTED) == 0) 629 return ENOTCONN; 630 inp->in6p_faddr = in6addr_any; 631 rip6_abort(so); 632 return (0); 633 } 634 635 static int 636 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 637 { 638 struct inpcb *inp = sotoinpcb(so); 639 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 640 struct ifaddr *ia = NULL; 641 int error = 0; 642 643 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 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 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 678 if (nam->sa_len != sizeof(*addr)) 679 return EINVAL; 680 if (TAILQ_EMPTY(&ifnet)) 681 return EADDRNOTAVAIL; 682 if (addr->sin6_family != AF_INET6) 683 return EAFNOSUPPORT; 684 685 /* 686 * Application should provide a proper zone ID or the use of 687 * default zone IDs should be enabled. Unfortunately, some 688 * applications do not behave as it should, so we need a 689 * workaround. Even if an appropriate ID is not determined, 690 * we'll see if we can determine the outgoing interface. If we 691 * can, determine the zone ID based on the interface below. 692 */ 693 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 694 scope_ambiguous = 1; 695 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 696 return(error); 697 698 INP_INFO_WLOCK(&ripcbinfo); 699 INP_LOCK(inp); 700 /* Source address selection. XXX: need pcblookup? */ 701 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 702 inp->in6p_moptions, NULL, 703 &inp->in6p_laddr, &ifp, &error); 704 if (in6a == NULL) { 705 INP_UNLOCK(inp); 706 INP_INFO_WUNLOCK(&ripcbinfo); 707 return (error ? error : EADDRNOTAVAIL); 708 } 709 710 /* XXX: see above */ 711 if (ifp && scope_ambiguous && 712 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 713 INP_UNLOCK(inp); 714 INP_INFO_WUNLOCK(&ripcbinfo); 715 return(error); 716 } 717 inp->in6p_faddr = addr->sin6_addr; 718 inp->in6p_laddr = *in6a; 719 soisconnected(so); 720 INP_UNLOCK(inp); 721 INP_INFO_WUNLOCK(&ripcbinfo); 722 return 0; 723 } 724 725 static int 726 rip6_shutdown(struct socket *so) 727 { 728 struct inpcb *inp; 729 730 inp = sotoinpcb(so); 731 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 732 INP_LOCK(inp); 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 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 748 INP_INFO_WLOCK(&ripcbinfo); 749 /* always copy sockaddr to avoid overwrites */ 750 /* Unlocked read. */ 751 if (so->so_state & SS_ISCONNECTED) { 752 if (nam) { 753 INP_INFO_WUNLOCK(&ripcbinfo); 754 m_freem(m); 755 return EISCONN; 756 } 757 /* XXX */ 758 bzero(&tmp, sizeof(tmp)); 759 tmp.sin6_family = AF_INET6; 760 tmp.sin6_len = sizeof(struct sockaddr_in6); 761 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 762 sizeof(struct in6_addr)); 763 dst = &tmp; 764 } else { 765 if (nam == NULL) { 766 INP_INFO_WUNLOCK(&ripcbinfo); 767 m_freem(m); 768 return ENOTCONN; 769 } 770 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 771 INP_INFO_WUNLOCK(&ripcbinfo); 772 m_freem(m); 773 return(EINVAL); 774 } 775 tmp = *(struct sockaddr_in6 *)nam; 776 dst = &tmp; 777 778 if (dst->sin6_family == AF_UNSPEC) { 779 /* 780 * XXX: we allow this case for backward 781 * compatibility to buggy applications that 782 * rely on old (and wrong) kernel behavior. 783 */ 784 log(LOG_INFO, "rip6 SEND: address family is " 785 "unspec. Assume AF_INET6\n"); 786 dst->sin6_family = AF_INET6; 787 } else if (dst->sin6_family != AF_INET6) { 788 INP_INFO_WUNLOCK(&ripcbinfo); 789 m_freem(m); 790 return(EAFNOSUPPORT); 791 } 792 } 793 ret = rip6_output(m, so, dst, control); 794 INP_INFO_WUNLOCK(&ripcbinfo); 795 return (ret); 796 } 797 798 struct pr_usrreqs rip6_usrreqs = { 799 .pru_abort = rip6_abort, 800 .pru_attach = rip6_attach, 801 .pru_bind = rip6_bind, 802 .pru_connect = rip6_connect, 803 .pru_control = in6_control, 804 .pru_detach = rip6_detach, 805 .pru_disconnect = rip6_disconnect, 806 .pru_peeraddr = in6_getpeeraddr, 807 .pru_send = rip6_send, 808 .pru_shutdown = rip6_shutdown, 809 .pru_sockaddr = in6_getsockaddr, 810 .pru_close = rip6_close, 811 };
Cache object: 3d3b21326baacc57ad96ed5b67a9f30f
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