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 #include <sys/vimage.h> 83 84 #include <net/if.h> 85 #include <net/if_types.h> 86 #include <net/route.h> 87 #include <net/vnet.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/vinet.h> 94 95 #include <netinet/icmp6.h> 96 #include <netinet/ip6.h> 97 #include <netinet6/ip6protosw.h> 98 #include <netinet6/ip6_mroute.h> 99 #include <netinet6/in6_pcb.h> 100 #include <netinet6/ip6_var.h> 101 #include <netinet6/nd6.h> 102 #include <netinet6/raw_ip6.h> 103 #include <netinet6/scope6_var.h> 104 #include <netinet6/vinet6.h> 105 106 #ifdef IPSEC 107 #include <netipsec/ipsec.h> 108 #include <netipsec/ipsec6.h> 109 #endif /* IPSEC */ 110 111 #include <machine/stdarg.h> 112 113 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 #ifdef VIMAGE_GLOBALS 121 extern struct inpcbhead ripcb; 122 extern struct inpcbinfo ripcbinfo; 123 struct rip6stat rip6stat; 124 #endif 125 126 extern u_long rip_sendspace; 127 extern u_long rip_recvspace; 128 129 /* 130 * Hooks for multicast forwarding. 131 */ 132 struct socket *ip6_mrouter = NULL; 133 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 134 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 135 int (*ip6_mrouter_done)(void); 136 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 137 int (*mrt6_ioctl)(int, caddr_t); 138 139 /* 140 * Setup generic address and protocol structures for raw_input routine, then 141 * pass them along with mbuf chain. 142 */ 143 int 144 rip6_input(struct mbuf **mp, int *offp, int proto) 145 { 146 INIT_VNET_INET(curvnet); 147 INIT_VNET_INET6(curvnet); 148 #ifdef IPSEC 149 INIT_VNET_IPSEC(curvnet); 150 #endif 151 struct mbuf *m = *mp; 152 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 153 register struct inpcb *in6p; 154 struct inpcb *last = 0; 155 struct mbuf *opts = NULL; 156 struct sockaddr_in6 fromsa; 157 158 V_rip6stat.rip6s_ipackets++; 159 160 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 161 /* XXX Send icmp6 host/port unreach? */ 162 m_freem(m); 163 return (IPPROTO_DONE); 164 } 165 166 init_sin6(&fromsa, m); /* general init */ 167 168 INP_INFO_RLOCK(&V_ripcbinfo); 169 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 170 /* XXX inp locking */ 171 if ((in6p->inp_vflag & INP_IPV6) == 0) 172 continue; 173 if (in6p->inp_ip_p && 174 in6p->inp_ip_p != proto) 175 continue; 176 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 177 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 178 continue; 179 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 180 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 181 continue; 182 if (jailed(in6p->inp_cred)) { 183 if (!prison_check_ip6(in6p->inp_cred, &ip6->ip6_dst)) 184 continue; 185 } 186 INP_RLOCK(in6p); 187 if (in6p->in6p_cksum != -1) { 188 V_rip6stat.rip6s_isum++; 189 if (in6_cksum(m, proto, *offp, 190 m->m_pkthdr.len - *offp)) { 191 INP_RUNLOCK(in6p); 192 V_rip6stat.rip6s_badsum++; 193 continue; 194 } 195 } 196 if (last != NULL) { 197 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 198 199 #ifdef IPSEC 200 /* 201 * Check AH/ESP integrity. 202 */ 203 if (n && ipsec6_in_reject(n, last)) { 204 m_freem(n); 205 V_ipsec6stat.in_polvio++; 206 /* Do not inject data into pcb. */ 207 } else 208 #endif /* IPSEC */ 209 if (n) { 210 if (last->inp_flags & INP_CONTROLOPTS || 211 last->inp_socket->so_options & SO_TIMESTAMP) 212 ip6_savecontrol(last, n, &opts); 213 /* strip intermediate headers */ 214 m_adj(n, *offp); 215 if (sbappendaddr(&last->inp_socket->so_rcv, 216 (struct sockaddr *)&fromsa, 217 n, opts) == 0) { 218 m_freem(n); 219 if (opts) 220 m_freem(opts); 221 V_rip6stat.rip6s_fullsock++; 222 } else 223 sorwakeup(last->inp_socket); 224 opts = NULL; 225 } 226 INP_RUNLOCK(last); 227 } 228 last = in6p; 229 } 230 INP_INFO_RUNLOCK(&V_ripcbinfo); 231 #ifdef IPSEC 232 /* 233 * Check AH/ESP integrity. 234 */ 235 if ((last != NULL) && ipsec6_in_reject(m, last)) { 236 m_freem(m); 237 V_ipsec6stat.in_polvio++; 238 V_ip6stat.ip6s_delivered--; 239 /* Do not inject data into pcb. */ 240 INP_RUNLOCK(last); 241 } else 242 #endif /* IPSEC */ 243 if (last != NULL) { 244 if (last->inp_flags & INP_CONTROLOPTS || 245 last->inp_socket->so_options & SO_TIMESTAMP) 246 ip6_savecontrol(last, m, &opts); 247 /* Strip intermediate headers. */ 248 m_adj(m, *offp); 249 if (sbappendaddr(&last->inp_socket->so_rcv, 250 (struct sockaddr *)&fromsa, m, opts) == 0) { 251 m_freem(m); 252 if (opts) 253 m_freem(opts); 254 V_rip6stat.rip6s_fullsock++; 255 } else 256 sorwakeup(last->inp_socket); 257 INP_RUNLOCK(last); 258 } else { 259 V_rip6stat.rip6s_nosock++; 260 if (m->m_flags & M_MCAST) 261 V_rip6stat.rip6s_nosockmcast++; 262 if (proto == IPPROTO_NONE) 263 m_freem(m); 264 else { 265 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 266 icmp6_error(m, ICMP6_PARAM_PROB, 267 ICMP6_PARAMPROB_NEXTHEADER, 268 prvnxtp - mtod(m, char *)); 269 } 270 V_ip6stat.ip6s_delivered--; 271 } 272 return (IPPROTO_DONE); 273 } 274 275 void 276 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 277 { 278 INIT_VNET_INET(curvnet); 279 struct ip6_hdr *ip6; 280 struct mbuf *m; 281 int off = 0; 282 struct ip6ctlparam *ip6cp = NULL; 283 const struct sockaddr_in6 *sa6_src = NULL; 284 void *cmdarg; 285 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 286 287 if (sa->sa_family != AF_INET6 || 288 sa->sa_len != sizeof(struct sockaddr_in6)) 289 return; 290 291 if ((unsigned)cmd >= PRC_NCMDS) 292 return; 293 if (PRC_IS_REDIRECT(cmd)) 294 notify = in6_rtchange, d = NULL; 295 else if (cmd == PRC_HOSTDEAD) 296 d = NULL; 297 else if (inet6ctlerrmap[cmd] == 0) 298 return; 299 300 /* 301 * If the parameter is from icmp6, decode it. 302 */ 303 if (d != NULL) { 304 ip6cp = (struct ip6ctlparam *)d; 305 m = ip6cp->ip6c_m; 306 ip6 = ip6cp->ip6c_ip6; 307 off = ip6cp->ip6c_off; 308 cmdarg = ip6cp->ip6c_cmdarg; 309 sa6_src = ip6cp->ip6c_src; 310 } else { 311 m = NULL; 312 ip6 = NULL; 313 cmdarg = NULL; 314 sa6_src = &sa6_any; 315 } 316 317 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 318 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 319 } 320 321 /* 322 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 323 * may have setup with control call. 324 */ 325 int 326 #if __STDC__ 327 rip6_output(struct mbuf *m, ...) 328 #else 329 rip6_output(m, va_alist) 330 struct mbuf *m; 331 va_dcl 332 #endif 333 { 334 INIT_VNET_INET6(curvnet); 335 struct mbuf *control; 336 struct socket *so; 337 struct sockaddr_in6 *dstsock; 338 struct in6_addr *dst; 339 struct ip6_hdr *ip6; 340 struct inpcb *in6p; 341 u_int plen = m->m_pkthdr.len; 342 int error = 0; 343 struct ip6_pktopts opt, *optp; 344 struct ifnet *oifp = NULL; 345 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 346 int scope_ambiguous = 0; 347 struct in6_addr *in6a; 348 va_list ap; 349 350 va_start(ap, m); 351 so = va_arg(ap, struct socket *); 352 dstsock = va_arg(ap, struct sockaddr_in6 *); 353 control = va_arg(ap, struct mbuf *); 354 va_end(ap); 355 356 in6p = sotoinpcb(so); 357 INP_WLOCK(in6p); 358 359 dst = &dstsock->sin6_addr; 360 if (control != NULL) { 361 if ((error = ip6_setpktopts(control, &opt, 362 in6p->in6p_outputopts, so->so_cred, 363 so->so_proto->pr_protocol)) != 0) { 364 goto bad; 365 } 366 optp = &opt; 367 } else 368 optp = in6p->in6p_outputopts; 369 370 /* 371 * Check and convert scope zone ID into internal form. 372 * 373 * XXX: we may still need to determine the zone later. 374 */ 375 if (!(so->so_state & SS_ISCONNECTED)) { 376 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 377 scope_ambiguous = 1; 378 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 379 goto bad; 380 } 381 382 /* 383 * For an ICMPv6 packet, we should know its type and code to update 384 * statistics. 385 */ 386 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 387 struct icmp6_hdr *icmp6; 388 if (m->m_len < sizeof(struct icmp6_hdr) && 389 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 390 error = ENOBUFS; 391 goto bad; 392 } 393 icmp6 = mtod(m, struct icmp6_hdr *); 394 type = icmp6->icmp6_type; 395 code = icmp6->icmp6_code; 396 } 397 398 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 399 if (m == NULL) { 400 error = ENOBUFS; 401 goto bad; 402 } 403 ip6 = mtod(m, struct ip6_hdr *); 404 405 /* 406 * Source address selection. 407 */ 408 if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 409 &oifp, &error)) == NULL) { 410 if (error == 0) 411 error = EADDRNOTAVAIL; 412 goto bad; 413 } 414 if (jailed(in6p->inp_cred)) 415 if (prison_getip6(in6p->inp_cred, in6a) != 0) { 416 error = EPERM; 417 goto bad; 418 } 419 ip6->ip6_src = *in6a; 420 421 if (oifp && scope_ambiguous) { 422 /* 423 * Application should provide a proper zone ID or the use of 424 * default zone IDs should be enabled. Unfortunately, some 425 * applications do not behave as it should, so we need a 426 * workaround. Even if an appropriate ID is not determined 427 * (when it's required), if we can determine the outgoing 428 * interface. determine the zone ID based on the interface. 429 */ 430 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 431 if (error != 0) 432 goto bad; 433 } 434 ip6->ip6_dst = dstsock->sin6_addr; 435 436 /* 437 * Fill in the rest of the IPv6 header fields. 438 */ 439 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 440 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 441 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 442 (IPV6_VERSION & IPV6_VERSION_MASK); 443 444 /* 445 * ip6_plen will be filled in ip6_output, so not fill it here. 446 */ 447 ip6->ip6_nxt = in6p->inp_ip_p; 448 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 449 450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 451 in6p->in6p_cksum != -1) { 452 struct mbuf *n; 453 int off; 454 u_int16_t *p; 455 456 /* Compute checksum. */ 457 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 458 off = offsetof(struct icmp6_hdr, icmp6_cksum); 459 else 460 off = in6p->in6p_cksum; 461 if (plen < off + 1) { 462 error = EINVAL; 463 goto bad; 464 } 465 off += sizeof(struct ip6_hdr); 466 467 n = m; 468 while (n && n->m_len <= off) { 469 off -= n->m_len; 470 n = n->m_next; 471 } 472 if (!n) 473 goto bad; 474 p = (u_int16_t *)(mtod(n, caddr_t) + off); 475 *p = 0; 476 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 477 } 478 479 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 480 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 481 if (oifp) 482 icmp6_ifoutstat_inc(oifp, type, code); 483 V_icmp6stat.icp6s_outhist[type]++; 484 } else 485 V_rip6stat.rip6s_opackets++; 486 487 goto freectl; 488 489 bad: 490 if (m) 491 m_freem(m); 492 493 freectl: 494 if (control != NULL) { 495 ip6_clearpktopts(&opt, -1); 496 m_freem(control); 497 } 498 INP_WUNLOCK(in6p); 499 return (error); 500 } 501 502 /* 503 * Raw IPv6 socket option processing. 504 */ 505 int 506 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 507 { 508 int error; 509 510 if (sopt->sopt_level == IPPROTO_ICMPV6) 511 /* 512 * XXX: is it better to call icmp6_ctloutput() directly 513 * from protosw? 514 */ 515 return (icmp6_ctloutput(so, sopt)); 516 else if (sopt->sopt_level != IPPROTO_IPV6) 517 return (EINVAL); 518 519 error = 0; 520 521 switch (sopt->sopt_dir) { 522 case SOPT_GET: 523 switch (sopt->sopt_name) { 524 case MRT6_INIT: 525 case MRT6_DONE: 526 case MRT6_ADD_MIF: 527 case MRT6_DEL_MIF: 528 case MRT6_ADD_MFC: 529 case MRT6_DEL_MFC: 530 case MRT6_PIM: 531 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 532 EOPNOTSUPP; 533 break; 534 case IPV6_CHECKSUM: 535 error = ip6_raw_ctloutput(so, sopt); 536 break; 537 default: 538 error = ip6_ctloutput(so, sopt); 539 break; 540 } 541 break; 542 543 case SOPT_SET: 544 switch (sopt->sopt_name) { 545 case MRT6_INIT: 546 case MRT6_DONE: 547 case MRT6_ADD_MIF: 548 case MRT6_DEL_MIF: 549 case MRT6_ADD_MFC: 550 case MRT6_DEL_MFC: 551 case MRT6_PIM: 552 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 553 EOPNOTSUPP; 554 break; 555 case IPV6_CHECKSUM: 556 error = ip6_raw_ctloutput(so, sopt); 557 break; 558 default: 559 error = ip6_ctloutput(so, sopt); 560 break; 561 } 562 break; 563 } 564 565 return (error); 566 } 567 568 static int 569 rip6_attach(struct socket *so, int proto, struct thread *td) 570 { 571 INIT_VNET_INET(so->so_vnet); 572 struct inpcb *inp; 573 struct icmp6_filter *filter; 574 int error; 575 576 inp = sotoinpcb(so); 577 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 578 579 error = priv_check(td, PRIV_NETINET_RAW); 580 if (error) 581 return (error); 582 error = soreserve(so, rip_sendspace, rip_recvspace); 583 if (error) 584 return (error); 585 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 586 if (filter == NULL) 587 return (ENOMEM); 588 INP_INFO_WLOCK(&V_ripcbinfo); 589 error = in_pcballoc(so, &V_ripcbinfo); 590 if (error) { 591 INP_INFO_WUNLOCK(&V_ripcbinfo); 592 free(filter, M_PCB); 593 return (error); 594 } 595 inp = (struct inpcb *)so->so_pcb; 596 INP_INFO_WUNLOCK(&V_ripcbinfo); 597 inp->inp_vflag |= INP_IPV6; 598 inp->inp_ip_p = (long)proto; 599 inp->in6p_hops = -1; /* use kernel default */ 600 inp->in6p_cksum = -1; 601 inp->in6p_icmp6filt = filter; 602 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 603 INP_WUNLOCK(inp); 604 return (0); 605 } 606 607 static void 608 rip6_detach(struct socket *so) 609 { 610 INIT_VNET_INET(so->so_vnet); 611 struct inpcb *inp; 612 613 inp = sotoinpcb(so); 614 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 615 616 if (so == ip6_mrouter && ip6_mrouter_done) 617 ip6_mrouter_done(); 618 /* xxx: RSVP */ 619 INP_INFO_WLOCK(&V_ripcbinfo); 620 INP_WLOCK(inp); 621 free(inp->in6p_icmp6filt, M_PCB); 622 in_pcbdetach(inp); 623 in_pcbfree(inp); 624 INP_INFO_WUNLOCK(&V_ripcbinfo); 625 } 626 627 /* XXXRW: This can't ever be called. */ 628 static void 629 rip6_abort(struct socket *so) 630 { 631 struct inpcb *inp; 632 633 inp = sotoinpcb(so); 634 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 635 636 soisdisconnected(so); 637 } 638 639 static void 640 rip6_close(struct socket *so) 641 { 642 struct inpcb *inp; 643 644 inp = sotoinpcb(so); 645 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 646 647 soisdisconnected(so); 648 } 649 650 static int 651 rip6_disconnect(struct socket *so) 652 { 653 struct inpcb *inp; 654 655 inp = sotoinpcb(so); 656 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 657 658 if ((so->so_state & SS_ISCONNECTED) == 0) 659 return (ENOTCONN); 660 inp->in6p_faddr = in6addr_any; 661 rip6_abort(so); 662 return (0); 663 } 664 665 static int 666 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 667 { 668 INIT_VNET_NET(so->so_vnet); 669 INIT_VNET_INET(so->so_vnet); 670 INIT_VNET_INET6(so->so_vnet); 671 struct inpcb *inp; 672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 673 struct ifaddr *ia = NULL; 674 int error = 0; 675 676 inp = sotoinpcb(so); 677 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 678 679 if (nam->sa_len != sizeof(*addr)) 680 return (EINVAL); 681 if (!prison_check_ip6(td->td_ucred, &addr->sin6_addr)) 682 return (EADDRNOTAVAIL); 683 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 684 return (EADDRNOTAVAIL); 685 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 686 return (error); 687 688 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 689 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 690 return (EADDRNOTAVAIL); 691 if (ia && 692 ((struct in6_ifaddr *)ia)->ia6_flags & 693 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 694 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 695 return (EADDRNOTAVAIL); 696 } 697 INP_INFO_WLOCK(&V_ripcbinfo); 698 INP_WLOCK(inp); 699 inp->in6p_laddr = addr->sin6_addr; 700 INP_WUNLOCK(inp); 701 INP_INFO_WUNLOCK(&V_ripcbinfo); 702 return (0); 703 } 704 705 static int 706 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 707 { 708 INIT_VNET_NET(so->so_vnet); 709 INIT_VNET_INET(so->so_vnet); 710 INIT_VNET_INET6(so->so_vnet); 711 struct inpcb *inp; 712 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 713 struct in6_addr *in6a = NULL; 714 struct ifnet *ifp = NULL; 715 int error = 0, scope_ambiguous = 0; 716 717 inp = sotoinpcb(so); 718 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 719 720 if (nam->sa_len != sizeof(*addr)) 721 return (EINVAL); 722 if (TAILQ_EMPTY(&V_ifnet)) 723 return (EADDRNOTAVAIL); 724 if (addr->sin6_family != AF_INET6) 725 return (EAFNOSUPPORT); 726 727 /* 728 * Application should provide a proper zone ID or the use of default 729 * zone IDs should be enabled. Unfortunately, some applications do 730 * not behave as it should, so we need a workaround. Even if an 731 * appropriate ID is not determined, we'll see if we can determine 732 * the outgoing interface. If we can, determine the zone ID based on 733 * the interface below. 734 */ 735 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 736 scope_ambiguous = 1; 737 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 738 return (error); 739 740 INP_INFO_WLOCK(&V_ripcbinfo); 741 INP_WLOCK(inp); 742 /* Source address selection. XXX: need pcblookup? */ 743 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 744 inp, NULL, so->so_cred, 745 &ifp, &error); 746 if (in6a == NULL) { 747 INP_WUNLOCK(inp); 748 INP_INFO_WUNLOCK(&V_ripcbinfo); 749 return (error ? error : EADDRNOTAVAIL); 750 } 751 752 /* XXX: see above */ 753 if (ifp && scope_ambiguous && 754 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 755 INP_WUNLOCK(inp); 756 INP_INFO_WUNLOCK(&V_ripcbinfo); 757 return (error); 758 } 759 inp->in6p_faddr = addr->sin6_addr; 760 inp->in6p_laddr = *in6a; 761 soisconnected(so); 762 INP_WUNLOCK(inp); 763 INP_INFO_WUNLOCK(&V_ripcbinfo); 764 return (0); 765 } 766 767 static int 768 rip6_shutdown(struct socket *so) 769 { 770 struct inpcb *inp; 771 772 inp = sotoinpcb(so); 773 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 774 775 INP_WLOCK(inp); 776 socantsendmore(so); 777 INP_WUNLOCK(inp); 778 return (0); 779 } 780 781 static int 782 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 783 struct mbuf *control, struct thread *td) 784 { 785 struct inpcb *inp; 786 struct sockaddr_in6 tmp; 787 struct sockaddr_in6 *dst; 788 int ret; 789 790 inp = sotoinpcb(so); 791 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 792 793 /* Always copy sockaddr to avoid overwrites. */ 794 /* Unlocked read. */ 795 if (so->so_state & SS_ISCONNECTED) { 796 if (nam) { 797 m_freem(m); 798 return (EISCONN); 799 } 800 /* XXX */ 801 bzero(&tmp, sizeof(tmp)); 802 tmp.sin6_family = AF_INET6; 803 tmp.sin6_len = sizeof(struct sockaddr_in6); 804 INP_RLOCK(inp); 805 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 806 sizeof(struct in6_addr)); 807 INP_RUNLOCK(inp); 808 dst = &tmp; 809 } else { 810 if (nam == NULL) { 811 m_freem(m); 812 return (ENOTCONN); 813 } 814 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 815 m_freem(m); 816 return (EINVAL); 817 } 818 tmp = *(struct sockaddr_in6 *)nam; 819 dst = &tmp; 820 821 if (dst->sin6_family == AF_UNSPEC) { 822 /* 823 * XXX: we allow this case for backward 824 * compatibility to buggy applications that 825 * rely on old (and wrong) kernel behavior. 826 */ 827 log(LOG_INFO, "rip6 SEND: address family is " 828 "unspec. Assume AF_INET6\n"); 829 dst->sin6_family = AF_INET6; 830 } else if (dst->sin6_family != AF_INET6) { 831 m_freem(m); 832 return(EAFNOSUPPORT); 833 } 834 } 835 ret = rip6_output(m, so, dst, control); 836 return (ret); 837 } 838 839 struct pr_usrreqs rip6_usrreqs = { 840 .pru_abort = rip6_abort, 841 .pru_attach = rip6_attach, 842 .pru_bind = rip6_bind, 843 .pru_connect = rip6_connect, 844 .pru_control = in6_control, 845 .pru_detach = rip6_detach, 846 .pru_disconnect = rip6_disconnect, 847 .pru_peeraddr = in6_getpeeraddr, 848 .pru_send = rip6_send, 849 .pru_shutdown = rip6_shutdown, 850 .pru_sockaddr = in6_getsockaddr, 851 .pru_close = rip6_close, 852 }; 853