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/jail.h> 71 #include <sys/lock.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/priv.h> 75 #include <sys/proc.h> 76 #include <sys/protosw.h> 77 #include <sys/signalvar.h> 78 #include <sys/socket.h> 79 #include <sys/socketvar.h> 80 #include <sys/sx.h> 81 #include <sys/syslog.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 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(&ripcbinfo); 157 LIST_FOREACH(in6p, &ripcb, inp_list) { 158 /* XXX inp locking */ 159 if ((in6p->inp_vflag & INP_IPV6) == 0) 160 continue; 161 if (in6p->inp_ip_p && 162 in6p->inp_ip_p != proto) 163 continue; 164 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 165 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 166 continue; 167 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 168 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 169 continue; 170 if (prison_check_ip6(in6p->inp_cred, &ip6->ip6_dst) != 0) 171 continue; 172 INP_RLOCK(in6p); 173 if (in6p->in6p_cksum != -1) { 174 rip6stat.rip6s_isum++; 175 if (in6_cksum(m, proto, *offp, 176 m->m_pkthdr.len - *offp)) { 177 INP_RUNLOCK(in6p); 178 rip6stat.rip6s_badsum++; 179 continue; 180 } 181 } 182 if (last) { 183 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 184 185 #ifdef IPSEC 186 /* 187 * Check AH/ESP integrity. 188 */ 189 if (n && ipsec6_in_reject(n, last)) { 190 m_freem(n); 191 ipsec6stat.in_polvio++; 192 /* Do not inject data into pcb. */ 193 } else 194 #endif /* IPSEC */ 195 if (n) { 196 if (last->inp_flags & INP_CONTROLOPTS || 197 last->inp_socket->so_options & SO_TIMESTAMP) 198 ip6_savecontrol(last, n, &opts); 199 /* strip intermediate headers */ 200 m_adj(n, *offp); 201 if (sbappendaddr(&last->inp_socket->so_rcv, 202 (struct sockaddr *)&fromsa, 203 n, opts) == 0) { 204 m_freem(n); 205 if (opts) 206 m_freem(opts); 207 rip6stat.rip6s_fullsock++; 208 } else 209 sorwakeup(last->inp_socket); 210 opts = NULL; 211 } 212 INP_RUNLOCK(last); 213 } 214 last = in6p; 215 } 216 INP_INFO_RUNLOCK(&ripcbinfo); 217 #ifdef IPSEC 218 /* 219 * Check AH/ESP integrity. 220 */ 221 if (last && ipsec6_in_reject(m, last)) { 222 m_freem(m); 223 ipsec6stat.in_polvio++; 224 ip6stat.ip6s_delivered--; 225 /* Do not inject data into pcb. */ 226 INP_RUNLOCK(last); 227 } else 228 #endif /* IPSEC */ 229 if (last) { 230 if (last->inp_flags & INP_CONTROLOPTS || 231 last->inp_socket->so_options & SO_TIMESTAMP) 232 ip6_savecontrol(last, m, &opts); 233 /* Strip intermediate headers. */ 234 m_adj(m, *offp); 235 if (sbappendaddr(&last->inp_socket->so_rcv, 236 (struct sockaddr *)&fromsa, m, opts) == 0) { 237 m_freem(m); 238 if (opts) 239 m_freem(opts); 240 rip6stat.rip6s_fullsock++; 241 } else 242 sorwakeup(last->inp_socket); 243 INP_RUNLOCK(last); 244 } else { 245 rip6stat.rip6s_nosock++; 246 if (m->m_flags & M_MCAST) 247 rip6stat.rip6s_nosockmcast++; 248 if (proto == IPPROTO_NONE) 249 m_freem(m); 250 else { 251 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 252 icmp6_error(m, ICMP6_PARAM_PROB, 253 ICMP6_PARAMPROB_NEXTHEADER, 254 prvnxtp - mtod(m, char *)); 255 } 256 ip6stat.ip6s_delivered--; 257 } 258 return (IPPROTO_DONE); 259 } 260 261 void 262 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 263 { 264 struct ip6_hdr *ip6; 265 struct mbuf *m; 266 int off = 0; 267 struct ip6ctlparam *ip6cp = NULL; 268 const struct sockaddr_in6 *sa6_src = NULL; 269 void *cmdarg; 270 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 271 272 if (sa->sa_family != AF_INET6 || 273 sa->sa_len != sizeof(struct sockaddr_in6)) 274 return; 275 276 if ((unsigned)cmd >= PRC_NCMDS) 277 return; 278 if (PRC_IS_REDIRECT(cmd)) 279 notify = in6_rtchange, d = NULL; 280 else if (cmd == PRC_HOSTDEAD) 281 d = NULL; 282 else if (inet6ctlerrmap[cmd] == 0) 283 return; 284 285 /* 286 * If the parameter is from icmp6, decode it. 287 */ 288 if (d != NULL) { 289 ip6cp = (struct ip6ctlparam *)d; 290 m = ip6cp->ip6c_m; 291 ip6 = ip6cp->ip6c_ip6; 292 off = ip6cp->ip6c_off; 293 cmdarg = ip6cp->ip6c_cmdarg; 294 sa6_src = ip6cp->ip6c_src; 295 } else { 296 m = NULL; 297 ip6 = NULL; 298 cmdarg = NULL; 299 sa6_src = &sa6_any; 300 } 301 302 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 303 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 304 } 305 306 /* 307 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 308 * 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 scope_ambiguous = 0; 331 struct in6_addr *in6a; 332 va_list ap; 333 334 va_start(ap, m); 335 so = va_arg(ap, struct socket *); 336 dstsock = va_arg(ap, struct sockaddr_in6 *); 337 control = va_arg(ap, struct mbuf *); 338 va_end(ap); 339 340 in6p = sotoinpcb(so); 341 INP_WLOCK(in6p); 342 343 dst = &dstsock->sin6_addr; 344 if (control) { 345 if ((error = ip6_setpktopts(control, &opt, 346 in6p->in6p_outputopts, so->so_cred, 347 so->so_proto->pr_protocol)) != 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 * 357 * XXX: we may still need to determine the zone later. 358 */ 359 if (!(so->so_state & SS_ISCONNECTED)) { 360 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 361 scope_ambiguous = 1; 362 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 363 goto bad; 364 } 365 366 /* 367 * For an ICMPv6 packet, we should know its type and code to update 368 * statistics. 369 */ 370 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 371 struct icmp6_hdr *icmp6; 372 if (m->m_len < sizeof(struct icmp6_hdr) && 373 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 374 error = ENOBUFS; 375 goto bad; 376 } 377 icmp6 = mtod(m, struct icmp6_hdr *); 378 type = icmp6->icmp6_type; 379 code = icmp6->icmp6_code; 380 } 381 382 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 383 if (m == NULL) { 384 error = ENOBUFS; 385 goto bad; 386 } 387 ip6 = mtod(m, struct ip6_hdr *); 388 389 /* 390 * Source address selection. 391 */ 392 if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 393 &oifp, &error)) == NULL) { 394 if (error == 0) 395 error = EADDRNOTAVAIL; 396 goto bad; 397 } 398 error = prison_get_ip6(in6p->inp_cred, in6a); 399 if (error != 0) 400 goto bad; 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 /* 419 * Fill in the rest of the IPv6 header fields. 420 */ 421 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 422 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 423 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 424 (IPV6_VERSION & IPV6_VERSION_MASK); 425 426 /* 427 * ip6_plen will be filled in ip6_output, so not fill it here. 428 */ 429 ip6->ip6_nxt = in6p->inp_ip_p; 430 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 431 432 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 433 in6p->in6p_cksum != -1) { 434 struct mbuf *n; 435 int off; 436 u_int16_t *p; 437 438 /* Compute checksum. */ 439 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 440 off = offsetof(struct icmp6_hdr, icmp6_cksum); 441 else 442 off = in6p->in6p_cksum; 443 if (plen < off + 1) { 444 error = EINVAL; 445 goto bad; 446 } 447 off += sizeof(struct ip6_hdr); 448 449 n = m; 450 while (n && n->m_len <= off) { 451 off -= n->m_len; 452 n = n->m_next; 453 } 454 if (!n) 455 goto bad; 456 p = (u_int16_t *)(mtod(n, caddr_t) + off); 457 *p = 0; 458 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 459 } 460 461 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 462 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 463 if (oifp) 464 icmp6_ifoutstat_inc(oifp, type, code); 465 icmp6stat.icp6s_outhist[type]++; 466 } else 467 rip6stat.rip6s_opackets++; 468 469 goto freectl; 470 471 bad: 472 if (m) 473 m_freem(m); 474 475 freectl: 476 if (control) { 477 ip6_clearpktopts(&opt, -1); 478 m_freem(control); 479 } 480 INP_WUNLOCK(in6p); 481 return (error); 482 } 483 484 /* 485 * Raw IPv6 socket option processing. 486 */ 487 int 488 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 489 { 490 int error; 491 492 if (sopt->sopt_level == IPPROTO_ICMPV6) 493 /* 494 * XXX: is it better to call icmp6_ctloutput() directly 495 * from protosw? 496 */ 497 return (icmp6_ctloutput(so, sopt)); 498 else if (sopt->sopt_level != IPPROTO_IPV6) 499 return (EINVAL); 500 501 error = 0; 502 503 switch (sopt->sopt_dir) { 504 case SOPT_GET: 505 switch (sopt->sopt_name) { 506 case MRT6_INIT: 507 case MRT6_DONE: 508 case MRT6_ADD_MIF: 509 case MRT6_DEL_MIF: 510 case MRT6_ADD_MFC: 511 case MRT6_DEL_MFC: 512 case MRT6_PIM: 513 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 514 EOPNOTSUPP; 515 break; 516 case IPV6_CHECKSUM: 517 error = ip6_raw_ctloutput(so, sopt); 518 break; 519 default: 520 error = ip6_ctloutput(so, sopt); 521 break; 522 } 523 break; 524 525 case SOPT_SET: 526 switch (sopt->sopt_name) { 527 case MRT6_INIT: 528 case MRT6_DONE: 529 case MRT6_ADD_MIF: 530 case MRT6_DEL_MIF: 531 case MRT6_ADD_MFC: 532 case MRT6_DEL_MFC: 533 case MRT6_PIM: 534 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 535 EOPNOTSUPP; 536 break; 537 case IPV6_CHECKSUM: 538 error = ip6_raw_ctloutput(so, sopt); 539 break; 540 default: 541 error = ip6_ctloutput(so, sopt); 542 break; 543 } 544 break; 545 } 546 547 return (error); 548 } 549 550 static int 551 rip6_attach(struct socket *so, int proto, struct thread *td) 552 { 553 struct inpcb *inp; 554 struct icmp6_filter *filter; 555 int error; 556 557 inp = sotoinpcb(so); 558 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 559 560 error = priv_check(td, PRIV_NETINET_RAW); 561 if (error) 562 return (error); 563 error = soreserve(so, rip_sendspace, rip_recvspace); 564 if (error) 565 return (error); 566 MALLOC(filter, struct icmp6_filter *, 567 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 568 if (filter == NULL) 569 return (ENOMEM); 570 INP_INFO_WLOCK(&ripcbinfo); 571 error = in_pcballoc(so, &ripcbinfo); 572 if (error) { 573 INP_INFO_WUNLOCK(&ripcbinfo); 574 FREE(filter, M_PCB); 575 return (error); 576 } 577 inp = (struct inpcb *)so->so_pcb; 578 INP_INFO_WUNLOCK(&ripcbinfo); 579 inp->inp_vflag |= INP_IPV6; 580 inp->inp_ip_p = (long)proto; 581 inp->in6p_hops = -1; /* use kernel default */ 582 inp->in6p_cksum = -1; 583 inp->in6p_icmp6filt = filter; 584 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 585 INP_WUNLOCK(inp); 586 return (0); 587 } 588 589 static void 590 rip6_detach(struct socket *so) 591 { 592 struct inpcb *inp; 593 594 inp = sotoinpcb(so); 595 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 596 597 if (so == ip6_mrouter && ip6_mrouter_done) 598 ip6_mrouter_done(); 599 /* xxx: RSVP */ 600 INP_INFO_WLOCK(&ripcbinfo); 601 INP_WLOCK(inp); 602 FREE(inp->in6p_icmp6filt, M_PCB); 603 in_pcbdetach(inp); 604 in_pcbfree(inp); 605 INP_INFO_WUNLOCK(&ripcbinfo); 606 } 607 608 /* XXXRW: This can't ever be called. */ 609 static void 610 rip6_abort(struct socket *so) 611 { 612 struct inpcb *inp; 613 614 inp = sotoinpcb(so); 615 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 616 617 soisdisconnected(so); 618 } 619 620 static void 621 rip6_close(struct socket *so) 622 { 623 struct inpcb *inp; 624 625 inp = sotoinpcb(so); 626 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 627 628 soisdisconnected(so); 629 } 630 631 static int 632 rip6_disconnect(struct socket *so) 633 { 634 struct inpcb *inp; 635 636 inp = sotoinpcb(so); 637 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 638 639 if ((so->so_state & SS_ISCONNECTED) == 0) 640 return (ENOTCONN); 641 inp->in6p_faddr = in6addr_any; 642 rip6_abort(so); 643 return (0); 644 } 645 646 static int 647 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 648 { 649 struct inpcb *inp; 650 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 651 struct ifaddr *ia = NULL; 652 int error = 0; 653 654 inp = sotoinpcb(so); 655 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 656 657 if (nam->sa_len != sizeof(*addr)) 658 return (EINVAL); 659 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 660 return (error); 661 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 662 return (EADDRNOTAVAIL); 663 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 664 return (error); 665 666 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 667 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 668 return (EADDRNOTAVAIL); 669 if (ia && 670 ((struct in6_ifaddr *)ia)->ia6_flags & 671 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 672 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 673 return (EADDRNOTAVAIL); 674 } 675 INP_INFO_WLOCK(&ripcbinfo); 676 INP_WLOCK(inp); 677 inp->in6p_laddr = addr->sin6_addr; 678 INP_WUNLOCK(inp); 679 INP_INFO_WUNLOCK(&ripcbinfo); 680 return (0); 681 } 682 683 static int 684 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 685 { 686 struct inpcb *inp; 687 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 688 struct in6_addr *in6a = NULL; 689 struct ifnet *ifp = NULL; 690 int error = 0, scope_ambiguous = 0; 691 692 inp = sotoinpcb(so); 693 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 694 695 if (nam->sa_len != sizeof(*addr)) 696 return (EINVAL); 697 if (TAILQ_EMPTY(&ifnet)) 698 return (EADDRNOTAVAIL); 699 if (addr->sin6_family != AF_INET6) 700 return (EAFNOSUPPORT); 701 702 /* 703 * Application should provide a proper zone ID or the use of default 704 * zone IDs should be enabled. Unfortunately, some applications do 705 * not behave as it should, so we need a workaround. Even if an 706 * appropriate ID is not determined, we'll see if we can determine 707 * the outgoing interface. If we can, determine the zone ID based on 708 * the interface below. 709 */ 710 if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 711 scope_ambiguous = 1; 712 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 713 return (error); 714 715 INP_INFO_WLOCK(&ripcbinfo); 716 INP_WLOCK(inp); 717 /* Source address selection. XXX: need pcblookup? */ 718 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 719 inp, NULL, so->so_cred, 720 &ifp, &error); 721 if (in6a == NULL) { 722 INP_WUNLOCK(inp); 723 INP_INFO_WUNLOCK(&ripcbinfo); 724 return (error ? error : EADDRNOTAVAIL); 725 } 726 727 /* XXX: see above */ 728 if (ifp && scope_ambiguous && 729 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 730 INP_WUNLOCK(inp); 731 INP_INFO_WUNLOCK(&ripcbinfo); 732 return (error); 733 } 734 inp->in6p_faddr = addr->sin6_addr; 735 inp->in6p_laddr = *in6a; 736 soisconnected(so); 737 INP_WUNLOCK(inp); 738 INP_INFO_WUNLOCK(&ripcbinfo); 739 return (0); 740 } 741 742 static int 743 rip6_shutdown(struct socket *so) 744 { 745 struct inpcb *inp; 746 747 inp = sotoinpcb(so); 748 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 749 750 INP_WLOCK(inp); 751 socantsendmore(so); 752 INP_WUNLOCK(inp); 753 return (0); 754 } 755 756 static int 757 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 758 struct mbuf *control, struct thread *td) 759 { 760 struct inpcb *inp; 761 struct sockaddr_in6 tmp; 762 struct sockaddr_in6 *dst; 763 int ret; 764 765 inp = sotoinpcb(so); 766 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 767 768 /* Always copy sockaddr to avoid overwrites. */ 769 /* Unlocked read. */ 770 if (so->so_state & SS_ISCONNECTED) { 771 if (nam) { 772 m_freem(m); 773 return (EISCONN); 774 } 775 /* XXX */ 776 bzero(&tmp, sizeof(tmp)); 777 tmp.sin6_family = AF_INET6; 778 tmp.sin6_len = sizeof(struct sockaddr_in6); 779 INP_RLOCK(inp); 780 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 781 sizeof(struct in6_addr)); 782 INP_RUNLOCK(inp); 783 dst = &tmp; 784 } else { 785 if (nam == NULL) { 786 m_freem(m); 787 return (ENOTCONN); 788 } 789 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 790 m_freem(m); 791 return (EINVAL); 792 } 793 tmp = *(struct sockaddr_in6 *)nam; 794 dst = &tmp; 795 796 if (dst->sin6_family == AF_UNSPEC) { 797 /* 798 * XXX: we allow this case for backward 799 * compatibility to buggy applications that 800 * rely on old (and wrong) kernel behavior. 801 */ 802 log(LOG_INFO, "rip6 SEND: address family is " 803 "unspec. Assume AF_INET6\n"); 804 dst->sin6_family = AF_INET6; 805 } else if (dst->sin6_family != AF_INET6) { 806 m_freem(m); 807 return(EAFNOSUPPORT); 808 } 809 } 810 ret = rip6_output(m, so, dst, control); 811 return (ret); 812 } 813 814 struct pr_usrreqs rip6_usrreqs = { 815 .pru_abort = rip6_abort, 816 .pru_attach = rip6_attach, 817 .pru_bind = rip6_bind, 818 .pru_connect = rip6_connect, 819 .pru_control = in6_control, 820 .pru_detach = rip6_detach, 821 .pru_disconnect = rip6_disconnect, 822 .pru_peeraddr = in6_getpeeraddr, 823 .pru_send = rip6_send, 824 .pru_shutdown = rip6_shutdown, 825 .pru_sockaddr = in6_getsockaddr, 826 .pru_close = rip6_close, 827 };
Cache object: 91dd2423573d4b2defdfb8488cb69418
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