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 routing. They all default to NULL, so leave them not 131 * initialized and rely on BSS being set to 0. 132 */ 133 134 /* 135 * The socket used to communicate with the multicast routing daemon. 136 */ 137 #ifdef VIMAGE_GLOBALS 138 struct socket *ip6_mrouter; 139 #endif 140 141 /* 142 * The various mrouter functions. 143 */ 144 int (*ip6_mrouter_set)(struct socket *, struct sockopt *); 145 int (*ip6_mrouter_get)(struct socket *, struct sockopt *); 146 int (*ip6_mrouter_done)(void); 147 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 148 int (*mrt6_ioctl)(u_long, caddr_t); 149 150 /* 151 * Setup generic address and protocol structures for raw_input routine, then 152 * pass them along with mbuf chain. 153 */ 154 int 155 rip6_input(struct mbuf **mp, int *offp, int proto) 156 { 157 INIT_VNET_INET(curvnet); 158 INIT_VNET_INET6(curvnet); 159 #ifdef IPSEC 160 INIT_VNET_IPSEC(curvnet); 161 #endif 162 struct ifnet *ifp; 163 struct mbuf *m = *mp; 164 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 165 register struct inpcb *in6p; 166 struct inpcb *last = 0; 167 struct mbuf *opts = NULL; 168 struct sockaddr_in6 fromsa; 169 170 V_rip6stat.rip6s_ipackets++; 171 172 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 173 /* XXX Send icmp6 host/port unreach? */ 174 m_freem(m); 175 return (IPPROTO_DONE); 176 } 177 178 init_sin6(&fromsa, m); /* general init */ 179 180 ifp = m->m_pkthdr.rcvif; 181 182 INP_INFO_RLOCK(&V_ripcbinfo); 183 LIST_FOREACH(in6p, &V_ripcb, inp_list) { 184 /* XXX inp locking */ 185 if ((in6p->inp_vflag & INP_IPV6) == 0) 186 continue; 187 if (in6p->inp_ip_p && 188 in6p->inp_ip_p != proto) 189 continue; 190 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 191 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 192 continue; 193 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 194 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 195 continue; 196 if (jailed(in6p->inp_cred)) { 197 /* 198 * Allow raw socket in jail to receive multicast; 199 * assume process had PRIV_NETINET_RAW at attach, 200 * and fall through into normal filter path if so. 201 */ 202 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 203 prison_check_ip6(in6p->inp_cred, 204 &ip6->ip6_dst) != 0) 205 continue; 206 } 207 if (in6p->in6p_cksum != -1) { 208 V_rip6stat.rip6s_isum++; 209 if (in6_cksum(m, proto, *offp, 210 m->m_pkthdr.len - *offp)) { 211 INP_RUNLOCK(in6p); 212 V_rip6stat.rip6s_badsum++; 213 continue; 214 } 215 } 216 INP_RLOCK(in6p); 217 /* 218 * If this raw socket has multicast state, and we 219 * have received a multicast, check if this socket 220 * should receive it, as multicast filtering is now 221 * the responsibility of the transport layer. 222 */ 223 if (in6p->in6p_moptions && 224 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 225 struct sockaddr_in6 mcaddr; 226 int blocked; 227 228 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 229 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 230 mcaddr.sin6_family = AF_INET6; 231 mcaddr.sin6_addr = ip6->ip6_dst; 232 233 blocked = im6o_mc_filter(in6p->in6p_moptions, ifp, 234 (struct sockaddr *)&mcaddr, 235 (struct sockaddr *)&fromsa); 236 if (blocked != MCAST_PASS) { 237 IP6STAT_INC(ip6s_notmember); 238 continue; 239 } 240 } 241 if (last != NULL) { 242 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 243 244 #ifdef IPSEC 245 /* 246 * Check AH/ESP integrity. 247 */ 248 if (n && ipsec6_in_reject(n, last)) { 249 m_freem(n); 250 V_ipsec6stat.in_polvio++; 251 /* Do not inject data into pcb. */ 252 } else 253 #endif /* IPSEC */ 254 if (n) { 255 if (last->inp_flags & INP_CONTROLOPTS || 256 last->inp_socket->so_options & SO_TIMESTAMP) 257 ip6_savecontrol(last, n, &opts); 258 /* strip intermediate headers */ 259 m_adj(n, *offp); 260 if (sbappendaddr(&last->inp_socket->so_rcv, 261 (struct sockaddr *)&fromsa, 262 n, opts) == 0) { 263 m_freem(n); 264 if (opts) 265 m_freem(opts); 266 V_rip6stat.rip6s_fullsock++; 267 } else 268 sorwakeup(last->inp_socket); 269 opts = NULL; 270 } 271 INP_RUNLOCK(last); 272 } 273 last = in6p; 274 } 275 INP_INFO_RUNLOCK(&V_ripcbinfo); 276 #ifdef IPSEC 277 /* 278 * Check AH/ESP integrity. 279 */ 280 if ((last != NULL) && ipsec6_in_reject(m, last)) { 281 m_freem(m); 282 V_ipsec6stat.in_polvio++; 283 V_ip6stat.ip6s_delivered--; 284 /* Do not inject data into pcb. */ 285 INP_RUNLOCK(last); 286 } else 287 #endif /* IPSEC */ 288 if (last != NULL) { 289 if (last->inp_flags & INP_CONTROLOPTS || 290 last->inp_socket->so_options & SO_TIMESTAMP) 291 ip6_savecontrol(last, m, &opts); 292 /* Strip intermediate headers. */ 293 m_adj(m, *offp); 294 if (sbappendaddr(&last->inp_socket->so_rcv, 295 (struct sockaddr *)&fromsa, m, opts) == 0) { 296 m_freem(m); 297 if (opts) 298 m_freem(opts); 299 V_rip6stat.rip6s_fullsock++; 300 } else 301 sorwakeup(last->inp_socket); 302 INP_RUNLOCK(last); 303 } else { 304 V_rip6stat.rip6s_nosock++; 305 if (m->m_flags & M_MCAST) 306 V_rip6stat.rip6s_nosockmcast++; 307 if (proto == IPPROTO_NONE) 308 m_freem(m); 309 else { 310 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 311 icmp6_error(m, ICMP6_PARAM_PROB, 312 ICMP6_PARAMPROB_NEXTHEADER, 313 prvnxtp - mtod(m, char *)); 314 } 315 V_ip6stat.ip6s_delivered--; 316 } 317 return (IPPROTO_DONE); 318 } 319 320 void 321 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 322 { 323 INIT_VNET_INET(curvnet); 324 struct ip6_hdr *ip6; 325 struct mbuf *m; 326 int off = 0; 327 struct ip6ctlparam *ip6cp = NULL; 328 const struct sockaddr_in6 *sa6_src = NULL; 329 void *cmdarg; 330 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 331 332 if (sa->sa_family != AF_INET6 || 333 sa->sa_len != sizeof(struct sockaddr_in6)) 334 return; 335 336 if ((unsigned)cmd >= PRC_NCMDS) 337 return; 338 if (PRC_IS_REDIRECT(cmd)) 339 notify = in6_rtchange, d = NULL; 340 else if (cmd == PRC_HOSTDEAD) 341 d = NULL; 342 else if (inet6ctlerrmap[cmd] == 0) 343 return; 344 345 /* 346 * If the parameter is from icmp6, decode it. 347 */ 348 if (d != NULL) { 349 ip6cp = (struct ip6ctlparam *)d; 350 m = ip6cp->ip6c_m; 351 ip6 = ip6cp->ip6c_ip6; 352 off = ip6cp->ip6c_off; 353 cmdarg = ip6cp->ip6c_cmdarg; 354 sa6_src = ip6cp->ip6c_src; 355 } else { 356 m = NULL; 357 ip6 = NULL; 358 cmdarg = NULL; 359 sa6_src = &sa6_any; 360 } 361 362 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 363 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 364 } 365 366 /* 367 * Generate IPv6 header and pass packet to ip6_output. Tack on options user 368 * may have setup with control call. 369 */ 370 int 371 #if __STDC__ 372 rip6_output(struct mbuf *m, ...) 373 #else 374 rip6_output(m, va_alist) 375 struct mbuf *m; 376 va_dcl 377 #endif 378 { 379 INIT_VNET_INET6(curvnet); 380 struct mbuf *control; 381 struct socket *so; 382 struct sockaddr_in6 *dstsock; 383 struct in6_addr *dst; 384 struct ip6_hdr *ip6; 385 struct inpcb *in6p; 386 u_int plen = m->m_pkthdr.len; 387 int error = 0; 388 struct ip6_pktopts opt, *optp; 389 struct ifnet *oifp = NULL; 390 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 391 int scope_ambiguous = 0; 392 struct in6_addr in6a; 393 va_list ap; 394 395 va_start(ap, m); 396 so = va_arg(ap, struct socket *); 397 dstsock = va_arg(ap, struct sockaddr_in6 *); 398 control = va_arg(ap, struct mbuf *); 399 va_end(ap); 400 401 in6p = sotoinpcb(so); 402 INP_WLOCK(in6p); 403 404 dst = &dstsock->sin6_addr; 405 if (control != NULL) { 406 if ((error = ip6_setpktopts(control, &opt, 407 in6p->in6p_outputopts, so->so_cred, 408 so->so_proto->pr_protocol)) != 0) { 409 goto bad; 410 } 411 optp = &opt; 412 } else 413 optp = in6p->in6p_outputopts; 414 415 /* 416 * Check and convert scope zone ID into internal form. 417 * 418 * XXX: we may still need to determine the zone later. 419 */ 420 if (!(so->so_state & SS_ISCONNECTED)) { 421 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 422 scope_ambiguous = 1; 423 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 424 goto bad; 425 } 426 427 /* 428 * For an ICMPv6 packet, we should know its type and code to update 429 * statistics. 430 */ 431 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 432 struct icmp6_hdr *icmp6; 433 if (m->m_len < sizeof(struct icmp6_hdr) && 434 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 435 error = ENOBUFS; 436 goto bad; 437 } 438 icmp6 = mtod(m, struct icmp6_hdr *); 439 type = icmp6->icmp6_type; 440 code = icmp6->icmp6_code; 441 } 442 443 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 444 if (m == NULL) { 445 error = ENOBUFS; 446 goto bad; 447 } 448 ip6 = mtod(m, struct ip6_hdr *); 449 450 /* 451 * Source address selection. 452 */ 453 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 454 &oifp, &in6a); 455 if (error) 456 goto bad; 457 error = prison_get_ip6(in6p->inp_cred, &in6a); 458 if (error != 0) 459 goto bad; 460 ip6->ip6_src = in6a; 461 462 if (oifp && scope_ambiguous) { 463 /* 464 * Application should provide a proper zone ID or the use of 465 * default zone IDs should be enabled. Unfortunately, some 466 * applications do not behave as it should, so we need a 467 * workaround. Even if an appropriate ID is not determined 468 * (when it's required), if we can determine the outgoing 469 * interface. determine the zone ID based on the interface. 470 */ 471 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 472 if (error != 0) 473 goto bad; 474 } 475 ip6->ip6_dst = dstsock->sin6_addr; 476 477 /* 478 * Fill in the rest of the IPv6 header fields. 479 */ 480 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 481 (in6p->inp_flow & IPV6_FLOWINFO_MASK); 482 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 483 (IPV6_VERSION & IPV6_VERSION_MASK); 484 485 /* 486 * ip6_plen will be filled in ip6_output, so not fill it here. 487 */ 488 ip6->ip6_nxt = in6p->inp_ip_p; 489 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 490 491 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 492 in6p->in6p_cksum != -1) { 493 struct mbuf *n; 494 int off; 495 u_int16_t *p; 496 497 /* Compute checksum. */ 498 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 499 off = offsetof(struct icmp6_hdr, icmp6_cksum); 500 else 501 off = in6p->in6p_cksum; 502 if (plen < off + 1) { 503 error = EINVAL; 504 goto bad; 505 } 506 off += sizeof(struct ip6_hdr); 507 508 n = m; 509 while (n && n->m_len <= off) { 510 off -= n->m_len; 511 n = n->m_next; 512 } 513 if (!n) 514 goto bad; 515 p = (u_int16_t *)(mtod(n, caddr_t) + off); 516 *p = 0; 517 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 518 } 519 520 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 521 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 522 if (oifp) 523 icmp6_ifoutstat_inc(oifp, type, code); 524 ICMP6STAT_INC(icp6s_outhist[type]); 525 } else 526 V_rip6stat.rip6s_opackets++; 527 528 goto freectl; 529 530 bad: 531 if (m) 532 m_freem(m); 533 534 freectl: 535 if (control != NULL) { 536 ip6_clearpktopts(&opt, -1); 537 m_freem(control); 538 } 539 INP_WUNLOCK(in6p); 540 return (error); 541 } 542 543 /* 544 * Raw IPv6 socket option processing. 545 */ 546 int 547 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 548 { 549 int error; 550 551 if (sopt->sopt_level == IPPROTO_ICMPV6) 552 /* 553 * XXX: is it better to call icmp6_ctloutput() directly 554 * from protosw? 555 */ 556 return (icmp6_ctloutput(so, sopt)); 557 else if (sopt->sopt_level != IPPROTO_IPV6) 558 return (EINVAL); 559 560 error = 0; 561 562 switch (sopt->sopt_dir) { 563 case SOPT_GET: 564 switch (sopt->sopt_name) { 565 case MRT6_INIT: 566 case MRT6_DONE: 567 case MRT6_ADD_MIF: 568 case MRT6_DEL_MIF: 569 case MRT6_ADD_MFC: 570 case MRT6_DEL_MFC: 571 case MRT6_PIM: 572 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 573 EOPNOTSUPP; 574 break; 575 case IPV6_CHECKSUM: 576 error = ip6_raw_ctloutput(so, sopt); 577 break; 578 default: 579 error = ip6_ctloutput(so, sopt); 580 break; 581 } 582 break; 583 584 case SOPT_SET: 585 switch (sopt->sopt_name) { 586 case MRT6_INIT: 587 case MRT6_DONE: 588 case MRT6_ADD_MIF: 589 case MRT6_DEL_MIF: 590 case MRT6_ADD_MFC: 591 case MRT6_DEL_MFC: 592 case MRT6_PIM: 593 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 594 EOPNOTSUPP; 595 break; 596 case IPV6_CHECKSUM: 597 error = ip6_raw_ctloutput(so, sopt); 598 break; 599 default: 600 error = ip6_ctloutput(so, sopt); 601 break; 602 } 603 break; 604 } 605 606 return (error); 607 } 608 609 static int 610 rip6_attach(struct socket *so, int proto, struct thread *td) 611 { 612 INIT_VNET_INET(so->so_vnet); 613 struct inpcb *inp; 614 struct icmp6_filter *filter; 615 int error; 616 617 inp = sotoinpcb(so); 618 KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 619 620 error = priv_check(td, PRIV_NETINET_RAW); 621 if (error) 622 return (error); 623 error = soreserve(so, rip_sendspace, rip_recvspace); 624 if (error) 625 return (error); 626 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 627 if (filter == NULL) 628 return (ENOMEM); 629 INP_INFO_WLOCK(&V_ripcbinfo); 630 error = in_pcballoc(so, &V_ripcbinfo); 631 if (error) { 632 INP_INFO_WUNLOCK(&V_ripcbinfo); 633 free(filter, M_PCB); 634 return (error); 635 } 636 inp = (struct inpcb *)so->so_pcb; 637 INP_INFO_WUNLOCK(&V_ripcbinfo); 638 inp->inp_vflag |= INP_IPV6; 639 inp->inp_ip_p = (long)proto; 640 inp->in6p_hops = -1; /* use kernel default */ 641 inp->in6p_cksum = -1; 642 inp->in6p_icmp6filt = filter; 643 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 644 INP_WUNLOCK(inp); 645 return (0); 646 } 647 648 static void 649 rip6_detach(struct socket *so) 650 { 651 INIT_VNET_INET(so->so_vnet); 652 INIT_VNET_INET6(so->so_vnet); 653 struct inpcb *inp; 654 655 inp = sotoinpcb(so); 656 KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 657 658 if (so == V_ip6_mrouter && ip6_mrouter_done) 659 ip6_mrouter_done(); 660 /* xxx: RSVP */ 661 INP_INFO_WLOCK(&V_ripcbinfo); 662 INP_WLOCK(inp); 663 free(inp->in6p_icmp6filt, M_PCB); 664 in_pcbdetach(inp); 665 in_pcbfree(inp); 666 INP_INFO_WUNLOCK(&V_ripcbinfo); 667 } 668 669 /* XXXRW: This can't ever be called. */ 670 static void 671 rip6_abort(struct socket *so) 672 { 673 struct inpcb *inp; 674 675 inp = sotoinpcb(so); 676 KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 677 678 soisdisconnected(so); 679 } 680 681 static void 682 rip6_close(struct socket *so) 683 { 684 struct inpcb *inp; 685 686 inp = sotoinpcb(so); 687 KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 688 689 soisdisconnected(so); 690 } 691 692 static int 693 rip6_disconnect(struct socket *so) 694 { 695 struct inpcb *inp; 696 697 inp = sotoinpcb(so); 698 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 699 700 if ((so->so_state & SS_ISCONNECTED) == 0) 701 return (ENOTCONN); 702 inp->in6p_faddr = in6addr_any; 703 rip6_abort(so); 704 return (0); 705 } 706 707 static int 708 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 709 { 710 INIT_VNET_NET(so->so_vnet); 711 INIT_VNET_INET(so->so_vnet); 712 INIT_VNET_INET6(so->so_vnet); 713 struct inpcb *inp; 714 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 715 struct ifaddr *ifa = NULL; 716 int error = 0; 717 718 inp = sotoinpcb(so); 719 KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 720 721 if (nam->sa_len != sizeof(*addr)) 722 return (EINVAL); 723 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 724 return (error); 725 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 726 return (EADDRNOTAVAIL); 727 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 728 return (error); 729 730 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 731 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 732 return (EADDRNOTAVAIL); 733 if (ifa != NULL && 734 ((struct in6_ifaddr *)ifa)->ia6_flags & 735 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 736 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 737 ifa_free(ifa); 738 return (EADDRNOTAVAIL); 739 } 740 if (ifa != NULL) 741 ifa_free(ifa); 742 INP_INFO_WLOCK(&V_ripcbinfo); 743 INP_WLOCK(inp); 744 inp->in6p_laddr = addr->sin6_addr; 745 INP_WUNLOCK(inp); 746 INP_INFO_WUNLOCK(&V_ripcbinfo); 747 return (0); 748 } 749 750 static int 751 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 752 { 753 INIT_VNET_NET(so->so_vnet); 754 INIT_VNET_INET(so->so_vnet); 755 INIT_VNET_INET6(so->so_vnet); 756 struct inpcb *inp; 757 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 758 struct in6_addr in6a; 759 struct ifnet *ifp = NULL; 760 int error = 0, scope_ambiguous = 0; 761 762 inp = sotoinpcb(so); 763 KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 764 765 if (nam->sa_len != sizeof(*addr)) 766 return (EINVAL); 767 if (TAILQ_EMPTY(&V_ifnet)) 768 return (EADDRNOTAVAIL); 769 if (addr->sin6_family != AF_INET6) 770 return (EAFNOSUPPORT); 771 772 /* 773 * Application should provide a proper zone ID or the use of default 774 * zone IDs should be enabled. Unfortunately, some applications do 775 * not behave as it should, so we need a workaround. Even if an 776 * appropriate ID is not determined, we'll see if we can determine 777 * the outgoing interface. If we can, determine the zone ID based on 778 * the interface below. 779 */ 780 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 781 scope_ambiguous = 1; 782 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 783 return (error); 784 785 INP_INFO_WLOCK(&V_ripcbinfo); 786 INP_WLOCK(inp); 787 /* Source address selection. XXX: need pcblookup? */ 788 error = in6_selectsrc(addr, inp->in6p_outputopts, 789 inp, NULL, so->so_cred, &ifp, &in6a); 790 if (error) { 791 INP_WUNLOCK(inp); 792 INP_INFO_WUNLOCK(&V_ripcbinfo); 793 return (error); 794 } 795 796 /* XXX: see above */ 797 if (ifp && scope_ambiguous && 798 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 799 INP_WUNLOCK(inp); 800 INP_INFO_WUNLOCK(&V_ripcbinfo); 801 return (error); 802 } 803 inp->in6p_faddr = addr->sin6_addr; 804 inp->in6p_laddr = in6a; 805 soisconnected(so); 806 INP_WUNLOCK(inp); 807 INP_INFO_WUNLOCK(&V_ripcbinfo); 808 return (0); 809 } 810 811 static int 812 rip6_shutdown(struct socket *so) 813 { 814 struct inpcb *inp; 815 816 inp = sotoinpcb(so); 817 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 818 819 INP_WLOCK(inp); 820 socantsendmore(so); 821 INP_WUNLOCK(inp); 822 return (0); 823 } 824 825 static int 826 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 827 struct mbuf *control, struct thread *td) 828 { 829 struct inpcb *inp; 830 struct sockaddr_in6 tmp; 831 struct sockaddr_in6 *dst; 832 int ret; 833 834 inp = sotoinpcb(so); 835 KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 836 837 /* Always copy sockaddr to avoid overwrites. */ 838 /* Unlocked read. */ 839 if (so->so_state & SS_ISCONNECTED) { 840 if (nam) { 841 m_freem(m); 842 return (EISCONN); 843 } 844 /* XXX */ 845 bzero(&tmp, sizeof(tmp)); 846 tmp.sin6_family = AF_INET6; 847 tmp.sin6_len = sizeof(struct sockaddr_in6); 848 INP_RLOCK(inp); 849 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 850 sizeof(struct in6_addr)); 851 INP_RUNLOCK(inp); 852 dst = &tmp; 853 } else { 854 if (nam == NULL) { 855 m_freem(m); 856 return (ENOTCONN); 857 } 858 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 859 m_freem(m); 860 return (EINVAL); 861 } 862 tmp = *(struct sockaddr_in6 *)nam; 863 dst = &tmp; 864 865 if (dst->sin6_family == AF_UNSPEC) { 866 /* 867 * XXX: we allow this case for backward 868 * compatibility to buggy applications that 869 * rely on old (and wrong) kernel behavior. 870 */ 871 log(LOG_INFO, "rip6 SEND: address family is " 872 "unspec. Assume AF_INET6\n"); 873 dst->sin6_family = AF_INET6; 874 } else if (dst->sin6_family != AF_INET6) { 875 m_freem(m); 876 return(EAFNOSUPPORT); 877 } 878 } 879 ret = rip6_output(m, so, dst, control); 880 return (ret); 881 } 882 883 struct pr_usrreqs rip6_usrreqs = { 884 .pru_abort = rip6_abort, 885 .pru_attach = rip6_attach, 886 .pru_bind = rip6_bind, 887 .pru_connect = rip6_connect, 888 .pru_control = in6_control, 889 .pru_detach = rip6_detach, 890 .pru_disconnect = rip6_disconnect, 891 .pru_peeraddr = in6_getpeeraddr, 892 .pru_send = rip6_send, 893 .pru_shutdown = rip6_shutdown, 894 .pru_sockaddr = in6_getsockaddr, 895 .pru_close = rip6_close, 896 }; 897