1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * Copyright (c) 2010-2011 Juniper Networks, Inc. 6 * Copyright (c) 2014 Kevin Lo 7 * All rights reserved. 8 * 9 * Portions of this software were developed by Robert N. M. Watson under 10 * contract to Juniper Networks, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the project nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ 37 * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $ 38 */ 39 40 /*- 41 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 42 * The Regents of the University of California. 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 * 69 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 70 */ 71 72 #include <sys/cdefs.h> 73 __FBSDID("$FreeBSD$"); 74 75 #include "opt_inet.h" 76 #include "opt_inet6.h" 77 #include "opt_ipsec.h" 78 #include "opt_route.h" 79 #include "opt_rss.h" 80 81 #include <sys/param.h> 82 #include <sys/jail.h> 83 #include <sys/kernel.h> 84 #include <sys/lock.h> 85 #include <sys/mbuf.h> 86 #include <sys/priv.h> 87 #include <sys/proc.h> 88 #include <sys/protosw.h> 89 #include <sys/sdt.h> 90 #include <sys/signalvar.h> 91 #include <sys/socket.h> 92 #include <sys/socketvar.h> 93 #include <sys/sx.h> 94 #include <sys/sysctl.h> 95 #include <sys/syslog.h> 96 #include <sys/systm.h> 97 98 #include <net/if.h> 99 #include <net/if_var.h> 100 #include <net/if_types.h> 101 #include <net/route.h> 102 #include <net/rss_config.h> 103 104 #include <netinet/in.h> 105 #include <netinet/in_kdtrace.h> 106 #include <netinet/in_pcb.h> 107 #include <netinet/in_systm.h> 108 #include <netinet/in_var.h> 109 #include <netinet/ip.h> 110 #include <netinet/ip6.h> 111 #include <netinet/icmp6.h> 112 #include <netinet/ip_var.h> 113 #include <netinet/udp.h> 114 #include <netinet/udp_var.h> 115 #include <netinet/udplite.h> 116 117 #include <netinet6/ip6_var.h> 118 #include <netinet6/in6_fib.h> 119 #include <netinet6/in6_pcb.h> 120 #include <netinet6/in6_rss.h> 121 #include <netinet6/udp6_var.h> 122 #include <netinet6/scope6_var.h> 123 124 #include <netipsec/ipsec_support.h> 125 126 #include <security/mac/mac_framework.h> 127 128 VNET_DEFINE(int, zero_checksum_port) = 0; 129 #define V_zero_checksum_port VNET(zero_checksum_port) 130 SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET | CTLFLAG_RW, 131 &VNET_NAME(zero_checksum_port), 0, 132 "Zero UDP checksum allowed for traffic to/from this port."); 133 134 /* 135 * UDP protocol implementation. 136 * Per RFC 768, August, 1980. 137 */ 138 139 static void udp6_detach(struct socket *so); 140 141 static int 142 udp6_append(struct inpcb *inp, struct mbuf *n, int off, 143 struct sockaddr_in6 *fromsa) 144 { 145 struct socket *so; 146 struct mbuf *opts = NULL, *tmp_opts; 147 struct udpcb *up; 148 bool filtered; 149 150 INP_LOCK_ASSERT(inp); 151 152 /* 153 * Engage the tunneling protocol. 154 */ 155 up = intoudpcb(inp); 156 if (up->u_tun_func != NULL) { 157 in_pcbref(inp); 158 INP_RUNLOCK(inp); 159 filtered = (*up->u_tun_func)(n, off, inp, 160 (struct sockaddr *)&fromsa[0], up->u_tun_ctx); 161 INP_RLOCK(inp); 162 if (filtered) 163 return (in_pcbrele_rlocked(inp)); 164 } 165 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 166 /* Check AH/ESP integrity. */ 167 if (IPSEC_ENABLED(ipv6)) { 168 if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) { 169 m_freem(n); 170 return (0); 171 } 172 } 173 #endif /* IPSEC */ 174 #ifdef MAC 175 if (mac_inpcb_check_deliver(inp, n) != 0) { 176 m_freem(n); 177 return (0); 178 } 179 #endif 180 opts = NULL; 181 if (inp->inp_flags & INP_CONTROLOPTS || 182 inp->inp_socket->so_options & SO_TIMESTAMP) 183 ip6_savecontrol(inp, n, &opts); 184 if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { 185 tmp_opts = sbcreatecontrol(&fromsa[1], 186 sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, 187 IPPROTO_IPV6, M_NOWAIT); 188 if (tmp_opts) { 189 if (opts) { 190 tmp_opts->m_next = opts; 191 opts = tmp_opts; 192 } else 193 opts = tmp_opts; 194 } 195 } 196 m_adj(n, off + sizeof(struct udphdr)); 197 198 so = inp->inp_socket; 199 SOCKBUF_LOCK(&so->so_rcv); 200 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n, 201 opts) == 0) { 202 soroverflow_locked(so); 203 m_freem(n); 204 if (opts) 205 m_freem(opts); 206 UDPSTAT_INC(udps_fullsock); 207 } else 208 sorwakeup_locked(so); 209 return (0); 210 } 211 212 struct udp6_multi_match_ctx { 213 struct ip6_hdr *ip6; 214 struct udphdr *uh; 215 }; 216 217 static bool 218 udp6_multi_match(const struct inpcb *inp, void *v) 219 { 220 struct udp6_multi_match_ctx *ctx = v; 221 222 if ((inp->inp_vflag & INP_IPV6) == 0) 223 return(false); 224 if (inp->inp_lport != ctx->uh->uh_dport) 225 return(false); 226 if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport) 227 return(false); 228 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 229 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst)) 230 return (false); 231 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 232 (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) || 233 inp->inp_fport != ctx->uh->uh_sport)) 234 return (false); 235 236 return (true); 237 } 238 239 static int 240 udp6_multi_input(struct mbuf *m, int off, int proto, 241 struct sockaddr_in6 *fromsa) 242 { 243 struct udp6_multi_match_ctx ctx; 244 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), 245 INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx); 246 struct inpcb *inp; 247 struct ip6_moptions *imo; 248 struct mbuf *n; 249 int appends = 0; 250 251 /* 252 * In the event that laddr should be set to the link-local 253 * address (this happens in RIPng), the multicast address 254 * specified in the received packet will not match laddr. To 255 * handle this situation, matching is relaxed if the 256 * receiving interface is the same as one specified in the 257 * socket and if the destination multicast address matches 258 * one of the multicast groups specified in the socket. 259 */ 260 261 /* 262 * KAME note: traditionally we dropped udpiphdr from mbuf 263 * here. We need udphdr for IPsec processing so we do that 264 * later. 265 */ 266 ctx.ip6 = mtod(m, struct ip6_hdr *); 267 ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off); 268 while ((inp = inp_next(&inpi)) != NULL) { 269 INP_RLOCK_ASSERT(inp); 270 /* 271 * XXXRW: Because we weren't holding either the inpcb 272 * or the hash lock when we checked for a match 273 * before, we should probably recheck now that the 274 * inpcb lock is (supposed to be) held. 275 */ 276 /* 277 * Handle socket delivery policy for any-source 278 * and source-specific multicast. [RFC3678] 279 */ 280 if ((imo = inp->in6p_moptions) != NULL) { 281 struct sockaddr_in6 mcaddr; 282 int blocked; 283 284 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 285 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 286 mcaddr.sin6_family = AF_INET6; 287 mcaddr.sin6_addr = ctx.ip6->ip6_dst; 288 289 blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif, 290 (struct sockaddr *)&mcaddr, 291 (struct sockaddr *)&fromsa[0]); 292 if (blocked != MCAST_PASS) { 293 if (blocked == MCAST_NOTGMEMBER) 294 IP6STAT_INC(ip6s_notmember); 295 if (blocked == MCAST_NOTSMEMBER || 296 blocked == MCAST_MUTED) 297 UDPSTAT_INC(udps_filtermcast); 298 continue; 299 } 300 } 301 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { 302 if (proto == IPPROTO_UDPLITE) 303 UDPLITE_PROBE(receive, NULL, inp, ctx.ip6, 304 inp, ctx.uh); 305 else 306 UDP_PROBE(receive, NULL, inp, ctx.ip6, inp, 307 ctx.uh); 308 if (udp6_append(inp, n, off, fromsa)) { 309 break; 310 } else 311 appends++; 312 } 313 /* 314 * Don't look for additional matches if this one does 315 * not have either the SO_REUSEPORT or SO_REUSEADDR 316 * socket options set. This heuristic avoids 317 * searching through all pcbs in the common case of a 318 * non-shared port. It assumes that an application 319 * will never clear these options after setting them. 320 */ 321 if ((inp->inp_socket->so_options & 322 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { 323 INP_RUNLOCK(inp); 324 break; 325 } 326 } 327 m_freem(m); 328 329 if (appends == 0) { 330 /* 331 * No matching pcb found; discard datagram. (No need 332 * to send an ICMP Port Unreachable for a broadcast 333 * or multicast datgram.) 334 */ 335 UDPSTAT_INC(udps_noport); 336 UDPSTAT_INC(udps_noportmcast); 337 } 338 339 return (IPPROTO_DONE); 340 } 341 342 int 343 udp6_input(struct mbuf **mp, int *offp, int proto) 344 { 345 struct mbuf *m = *mp; 346 struct ip6_hdr *ip6; 347 struct udphdr *uh; 348 struct inpcb *inp; 349 struct inpcbinfo *pcbinfo; 350 struct udpcb *up; 351 int off = *offp; 352 int cscov_partial; 353 int plen, ulen; 354 struct sockaddr_in6 fromsa[2]; 355 struct m_tag *fwd_tag; 356 uint16_t uh_sum; 357 uint8_t nxt; 358 359 NET_EPOCH_ASSERT(); 360 361 if (m->m_len < off + sizeof(struct udphdr)) { 362 m = m_pullup(m, off + sizeof(struct udphdr)); 363 if (m == NULL) { 364 IP6STAT_INC(ip6s_exthdrtoolong); 365 *mp = NULL; 366 return (IPPROTO_DONE); 367 } 368 } 369 ip6 = mtod(m, struct ip6_hdr *); 370 uh = (struct udphdr *)((caddr_t)ip6 + off); 371 372 UDPSTAT_INC(udps_ipackets); 373 374 /* 375 * Destination port of 0 is illegal, based on RFC768. 376 */ 377 if (uh->uh_dport == 0) 378 goto badunlocked; 379 380 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 381 ulen = ntohs((u_short)uh->uh_ulen); 382 383 nxt = proto; 384 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 385 if (nxt == IPPROTO_UDPLITE) { 386 /* Zero means checksum over the complete packet. */ 387 if (ulen == 0) 388 ulen = plen; 389 if (ulen == plen) 390 cscov_partial = 0; 391 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 392 /* XXX: What is the right UDPLite MIB counter? */ 393 goto badunlocked; 394 } 395 if (uh->uh_sum == 0) { 396 /* XXX: What is the right UDPLite MIB counter? */ 397 goto badunlocked; 398 } 399 } else { 400 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 401 UDPSTAT_INC(udps_badlen); 402 goto badunlocked; 403 } 404 if (uh->uh_sum == 0) { 405 UDPSTAT_INC(udps_nosum); 406 /* 407 * dport 0 was rejected earlier so this is OK even if 408 * zero_checksum_port is 0 (which is its default value). 409 */ 410 if (ntohs(uh->uh_dport) == V_zero_checksum_port) 411 goto skip_checksum; 412 else 413 goto badunlocked; 414 } 415 } 416 417 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 418 !cscov_partial) { 419 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 420 uh_sum = m->m_pkthdr.csum_data; 421 else 422 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 423 m->m_pkthdr.csum_data); 424 uh_sum ^= 0xffff; 425 } else 426 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 427 428 if (uh_sum != 0) { 429 UDPSTAT_INC(udps_badsum); 430 goto badunlocked; 431 } 432 433 skip_checksum: 434 /* 435 * Construct sockaddr format source address. 436 */ 437 init_sin6(&fromsa[0], m, 0); 438 fromsa[0].sin6_port = uh->uh_sport; 439 init_sin6(&fromsa[1], m, 1); 440 fromsa[1].sin6_port = uh->uh_dport; 441 442 pcbinfo = udp_get_inpcbinfo(nxt); 443 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 444 *mp = NULL; 445 return (udp6_multi_input(m, off, proto, fromsa)); 446 } 447 448 /* 449 * Locate pcb for datagram. 450 */ 451 452 /* 453 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 454 */ 455 if ((m->m_flags & M_IP6_NEXTHOP) && 456 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 457 struct sockaddr_in6 *next_hop6; 458 459 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 460 461 /* 462 * Transparently forwarded. Pretend to be the destination. 463 * Already got one like this? 464 */ 465 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 466 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 467 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); 468 if (!inp) { 469 /* 470 * It's new. Try to find the ambushing socket. 471 * Because we've rewritten the destination address, 472 * any hardware-generated hash is ignored. 473 */ 474 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 475 uh->uh_sport, &next_hop6->sin6_addr, 476 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 477 uh->uh_dport, INPLOOKUP_WILDCARD | 478 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); 479 } 480 /* Remove the tag from the packet. We don't need it anymore. */ 481 m_tag_delete(m, fwd_tag); 482 m->m_flags &= ~M_IP6_NEXTHOP; 483 } else 484 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 485 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 486 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 487 m->m_pkthdr.rcvif, m); 488 if (inp == NULL) { 489 if (V_udp_log_in_vain) { 490 char ip6bufs[INET6_ADDRSTRLEN]; 491 char ip6bufd[INET6_ADDRSTRLEN]; 492 493 log(LOG_INFO, 494 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 495 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 496 ntohs(uh->uh_dport), 497 ip6_sprintf(ip6bufs, &ip6->ip6_src), 498 ntohs(uh->uh_sport)); 499 } 500 if (nxt == IPPROTO_UDPLITE) 501 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); 502 else 503 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); 504 UDPSTAT_INC(udps_noport); 505 if (m->m_flags & M_MCAST) { 506 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 507 UDPSTAT_INC(udps_noportmcast); 508 goto badunlocked; 509 } 510 if (V_udp_blackhole && (V_udp_blackhole_local || 511 !in6_localaddr(&ip6->ip6_src))) 512 goto badunlocked; 513 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 514 *mp = NULL; 515 return (IPPROTO_DONE); 516 } 517 INP_RLOCK_ASSERT(inp); 518 up = intoudpcb(inp); 519 if (cscov_partial) { 520 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 521 INP_RUNLOCK(inp); 522 m_freem(m); 523 *mp = NULL; 524 return (IPPROTO_DONE); 525 } 526 } 527 if (nxt == IPPROTO_UDPLITE) 528 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); 529 else 530 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 531 if (udp6_append(inp, m, off, fromsa) == 0) 532 INP_RUNLOCK(inp); 533 *mp = NULL; 534 return (IPPROTO_DONE); 535 536 badunlocked: 537 m_freem(m); 538 *mp = NULL; 539 return (IPPROTO_DONE); 540 } 541 542 static void 543 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) 544 { 545 struct udphdr uh; 546 struct ip6_hdr *ip6; 547 struct mbuf *m; 548 struct inpcb *inp; 549 int errno, off = 0; 550 struct udp_portonly { 551 u_int16_t uh_sport; 552 u_int16_t uh_dport; 553 } *uhp; 554 555 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0) 556 return; 557 558 m = ip6cp->ip6c_m; 559 ip6 = ip6cp->ip6c_ip6; 560 off = ip6cp->ip6c_off; 561 562 /* Check if we can safely examine src and dst ports. */ 563 if (m->m_pkthdr.len < off + sizeof(*uhp)) 564 return; 565 566 bzero(&uh, sizeof(uh)); 567 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 568 569 /* Check to see if its tunneled */ 570 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, 571 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 572 m->m_pkthdr.rcvif, m); 573 if (inp != NULL) { 574 struct udpcb *up; 575 udp_tun_icmp_t *func; 576 577 up = intoudpcb(inp); 578 func = up->u_icmp_func; 579 INP_RUNLOCK(inp); 580 if (func != NULL) 581 func(ip6cp); 582 } 583 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport, 584 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg, 585 udp_notify); 586 } 587 588 static void 589 udp6_ctlinput(struct ip6ctlparam *ctl) 590 { 591 592 return (udp6_common_ctlinput(ctl, &V_udbinfo)); 593 } 594 595 static void 596 udplite6_ctlinput(struct ip6ctlparam *ctl) 597 { 598 599 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo)); 600 } 601 602 static int 603 udp6_getcred(SYSCTL_HANDLER_ARGS) 604 { 605 struct xucred xuc; 606 struct sockaddr_in6 addrs[2]; 607 struct epoch_tracker et; 608 struct inpcb *inp; 609 int error; 610 611 error = priv_check(req->td, PRIV_NETINET_GETCRED); 612 if (error) 613 return (error); 614 615 if (req->newlen != sizeof(addrs)) 616 return (EINVAL); 617 if (req->oldlen != sizeof(struct xucred)) 618 return (EINVAL); 619 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 620 if (error) 621 return (error); 622 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 623 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 624 return (error); 625 } 626 NET_EPOCH_ENTER(et); 627 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 628 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 629 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 630 NET_EPOCH_EXIT(et); 631 if (inp != NULL) { 632 INP_RLOCK_ASSERT(inp); 633 if (inp->inp_socket == NULL) 634 error = ENOENT; 635 if (error == 0) 636 error = cr_canseesocket(req->td->td_ucred, 637 inp->inp_socket); 638 if (error == 0) 639 cru2x(inp->inp_cred, &xuc); 640 INP_RUNLOCK(inp); 641 } else 642 error = ENOENT; 643 if (error == 0) 644 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 645 return (error); 646 } 647 648 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, 649 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 650 0, 0, udp6_getcred, "S,xucred", 651 "Get the xucred of a UDP6 connection"); 652 653 static int 654 udp6_send(struct socket *so, int flags_arg, struct mbuf *m, 655 struct sockaddr *addr6, struct mbuf *control, struct thread *td) 656 { 657 struct inpcb *inp; 658 struct ip6_hdr *ip6; 659 struct udphdr *udp6; 660 struct in6_addr *laddr, *faddr, in6a; 661 struct ip6_pktopts *optp, opt; 662 struct sockaddr_in6 *sin6, tmp; 663 struct epoch_tracker et; 664 int cscov_partial, error, flags, hlen, scope_ambiguous; 665 u_int32_t ulen, plen; 666 uint16_t cscov; 667 u_short fport; 668 uint8_t nxt; 669 670 if (addr6) { 671 error = 0; 672 if (addr6->sa_family != AF_INET6) 673 error = EAFNOSUPPORT; 674 else if (addr6->sa_len != sizeof(struct sockaddr_in6)) 675 error = EINVAL; 676 if (__predict_false(error != 0)) { 677 m_freem(control); 678 m_freem(m); 679 return (error); 680 } 681 } 682 683 sin6 = (struct sockaddr_in6 *)addr6; 684 685 /* 686 * In contrast to IPv4 we do not validate the max. packet length 687 * here due to IPv6 Jumbograms (RFC2675). 688 */ 689 690 scope_ambiguous = 0; 691 if (sin6) { 692 /* Protect *addr6 from overwrites. */ 693 tmp = *sin6; 694 sin6 = &tmp; 695 696 /* 697 * Application should provide a proper zone ID or the use of 698 * default zone IDs should be enabled. Unfortunately, some 699 * applications do not behave as it should, so we need a 700 * workaround. Even if an appropriate ID is not determined, 701 * we'll see if we can determine the outgoing interface. If we 702 * can, determine the zone ID based on the interface below. 703 */ 704 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 705 scope_ambiguous = 1; 706 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 707 if (control) 708 m_freem(control); 709 m_freem(m); 710 return (error); 711 } 712 } 713 714 inp = sotoinpcb(so); 715 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 716 /* 717 * In the following cases we want a write lock on the inp for either 718 * local operations or for possible route cache updates in the IPv6 719 * output path: 720 * - on connected sockets (sin6 is NULL) for route cache updates, 721 * - when we are not bound to an address and source port (it is 722 * in6_pcbsetport() which will require the write lock). 723 * 724 * We check the inp fields before actually locking the inp, so 725 * here exists a race, and we may WLOCK the inp and end with already 726 * bound one by other thread. This is fine. 727 */ 728 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 729 inp->inp_lport == 0)) 730 INP_WLOCK(inp); 731 else 732 INP_RLOCK(inp); 733 734 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 735 IPPROTO_UDP : IPPROTO_UDPLITE; 736 737 #ifdef INET 738 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 739 int hasv4addr; 740 741 if (sin6 == NULL) 742 hasv4addr = (inp->inp_vflag & INP_IPV4); 743 else 744 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 745 ? 1 : 0; 746 if (hasv4addr) { 747 /* 748 * XXXRW: We release UDP-layer locks before calling 749 * udp_send() in order to avoid recursion. However, 750 * this does mean there is a short window where inp's 751 * fields are unstable. Could this lead to a 752 * potential race in which the factors causing us to 753 * select the UDPv4 output routine are invalidated? 754 */ 755 INP_UNLOCK(inp); 756 if (sin6) 757 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 758 /* addr will just be freed in sendit(). */ 759 return (udp_send(so, flags_arg | PRUS_IPV6, m, 760 (struct sockaddr *)sin6, control, td)); 761 } 762 } else 763 #endif 764 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 765 /* 766 * Given this is either an IPv6-only socket or no INET is 767 * supported we will fail the send if the given destination 768 * address is a v4mapped address. 769 * 770 * XXXGL: do we leak m and control? 771 */ 772 INP_UNLOCK(inp); 773 return (EINVAL); 774 } 775 776 NET_EPOCH_ENTER(et); 777 if (control) { 778 if ((error = ip6_setpktopts(control, &opt, 779 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 780 goto release; 781 } 782 optp = &opt; 783 } else 784 optp = inp->in6p_outputopts; 785 786 if (sin6) { 787 /* 788 * Since we saw no essential reason for calling in_pcbconnect, 789 * we get rid of such kind of logic, and call in6_selectsrc 790 * and in6_pcbsetport in order to fill in the local address 791 * and the local port. 792 */ 793 if (sin6->sin6_port == 0) { 794 error = EADDRNOTAVAIL; 795 goto release; 796 } 797 798 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 799 /* how about ::ffff:0.0.0.0 case? */ 800 error = EISCONN; 801 goto release; 802 } 803 804 /* 805 * Given we handle the v4mapped case in the INET block above 806 * assert here that it must not happen anymore. 807 */ 808 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 809 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 810 "should have handled.", __func__, sin6)); 811 812 /* This only requires read-locking. */ 813 error = in6_selectsrc_socket(sin6, optp, inp, 814 td->td_ucred, scope_ambiguous, &in6a, NULL); 815 if (error) 816 goto release; 817 laddr = &in6a; 818 819 if (inp->inp_lport == 0) { 820 struct inpcbinfo *pcbinfo; 821 822 INP_WLOCK_ASSERT(inp); 823 824 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 825 INP_HASH_WLOCK(pcbinfo); 826 error = in6_pcbsetport(laddr, inp, td->td_ucred); 827 INP_HASH_WUNLOCK(pcbinfo); 828 if (error != 0) { 829 /* Undo an address bind that may have occurred. */ 830 inp->in6p_laddr = in6addr_any; 831 goto release; 832 } 833 } 834 faddr = &sin6->sin6_addr; 835 fport = sin6->sin6_port; /* allow 0 port */ 836 837 } else { 838 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 839 error = ENOTCONN; 840 goto release; 841 } 842 laddr = &inp->in6p_laddr; 843 faddr = &inp->in6p_faddr; 844 fport = inp->inp_fport; 845 } 846 847 ulen = m->m_pkthdr.len; 848 plen = sizeof(struct udphdr) + ulen; 849 hlen = sizeof(struct ip6_hdr); 850 851 /* 852 * Calculate data length and get a mbuf 853 * for UDP and IP6 headers. 854 */ 855 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 856 if (m == NULL) { 857 error = ENOBUFS; 858 goto release; 859 } 860 861 /* 862 * Stuff checksum and output datagram. 863 */ 864 cscov = cscov_partial = 0; 865 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 866 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 867 udp6->uh_dport = fport; 868 if (nxt == IPPROTO_UDPLITE) { 869 struct udpcb *up; 870 871 up = intoudpcb(inp); 872 cscov = up->u_txcslen; 873 if (cscov >= plen) 874 cscov = 0; 875 udp6->uh_ulen = htons(cscov); 876 /* 877 * For UDP-Lite, checksum coverage length of zero means 878 * the entire UDPLite packet is covered by the checksum. 879 */ 880 cscov_partial = (cscov == 0) ? 0 : 1; 881 } else if (plen <= 0xffff) 882 udp6->uh_ulen = htons((u_short)plen); 883 else 884 udp6->uh_ulen = 0; 885 udp6->uh_sum = 0; 886 887 ip6 = mtod(m, struct ip6_hdr *); 888 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 889 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 890 ip6->ip6_vfc |= IPV6_VERSION; 891 ip6->ip6_plen = htons((u_short)plen); 892 ip6->ip6_nxt = nxt; 893 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 894 ip6->ip6_src = *laddr; 895 ip6->ip6_dst = *faddr; 896 897 #ifdef MAC 898 mac_inpcb_create_mbuf(inp, m); 899 #endif 900 901 if (cscov_partial) { 902 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 903 sizeof(struct ip6_hdr), plen, cscov)) == 0) 904 udp6->uh_sum = 0xffff; 905 } else { 906 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 907 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 908 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 909 } 910 911 flags = 0; 912 #if defined(ROUTE_MPATH) || defined(RSS) 913 if (CALC_FLOWID_OUTBOUND_SENDTO) { 914 uint32_t hash_type, hash_val; 915 uint8_t pr; 916 917 pr = inp->inp_socket->so_proto->pr_protocol; 918 919 hash_val = fib6_calc_packet_hash(laddr, faddr, 920 inp->inp_lport, fport, pr, &hash_type); 921 m->m_pkthdr.flowid = hash_val; 922 M_HASHTYPE_SET(m, hash_type); 923 } 924 /* do not use inp flowid */ 925 flags |= IP_NODEFAULTFLOWID; 926 #endif 927 928 UDPSTAT_INC(udps_opackets); 929 if (nxt == IPPROTO_UDPLITE) 930 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 931 else 932 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 933 error = ip6_output(m, optp, 934 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 935 inp->in6p_moptions, NULL, inp); 936 INP_UNLOCK(inp); 937 NET_EPOCH_EXIT(et); 938 939 if (control) { 940 ip6_clearpktopts(&opt, -1); 941 m_freem(control); 942 } 943 return (error); 944 945 release: 946 INP_UNLOCK(inp); 947 NET_EPOCH_EXIT(et); 948 if (control) { 949 ip6_clearpktopts(&opt, -1); 950 m_freem(control); 951 } 952 m_freem(m); 953 954 return (error); 955 } 956 957 static void 958 udp6_abort(struct socket *so) 959 { 960 struct inpcb *inp; 961 struct inpcbinfo *pcbinfo; 962 963 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 964 inp = sotoinpcb(so); 965 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 966 967 INP_WLOCK(inp); 968 #ifdef INET 969 if (inp->inp_vflag & INP_IPV4) { 970 INP_WUNLOCK(inp); 971 udp_abort(so); 972 return; 973 } 974 #endif 975 976 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 977 INP_HASH_WLOCK(pcbinfo); 978 in6_pcbdisconnect(inp); 979 inp->in6p_laddr = in6addr_any; 980 INP_HASH_WUNLOCK(pcbinfo); 981 soisdisconnected(so); 982 } 983 INP_WUNLOCK(inp); 984 } 985 986 static int 987 udp6_attach(struct socket *so, int proto, struct thread *td) 988 { 989 struct inpcb *inp; 990 struct inpcbinfo *pcbinfo; 991 int error; 992 993 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 994 inp = sotoinpcb(so); 995 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 996 997 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 998 error = soreserve(so, udp_sendspace, udp_recvspace); 999 if (error) 1000 return (error); 1001 } 1002 error = in_pcballoc(so, pcbinfo); 1003 if (error) 1004 return (error); 1005 inp = (struct inpcb *)so->so_pcb; 1006 inp->in6p_cksum = -1; /* just to be sure */ 1007 /* 1008 * XXX: ugly!! 1009 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1010 * because the socket may be bound to an IPv6 wildcard address, 1011 * which may match an IPv4-mapped IPv6 address. 1012 */ 1013 inp->inp_ip_ttl = V_ip_defttl; 1014 INP_WUNLOCK(inp); 1015 return (0); 1016 } 1017 1018 static int 1019 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1020 { 1021 struct inpcb *inp; 1022 struct inpcbinfo *pcbinfo; 1023 int error; 1024 u_char vflagsav; 1025 1026 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1027 inp = sotoinpcb(so); 1028 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1029 1030 if (nam->sa_family != AF_INET6) 1031 return (EAFNOSUPPORT); 1032 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1033 return (EINVAL); 1034 1035 INP_WLOCK(inp); 1036 INP_HASH_WLOCK(pcbinfo); 1037 vflagsav = inp->inp_vflag; 1038 inp->inp_vflag &= ~INP_IPV4; 1039 inp->inp_vflag |= INP_IPV6; 1040 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1041 struct sockaddr_in6 *sin6_p; 1042 1043 sin6_p = (struct sockaddr_in6 *)nam; 1044 1045 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1046 inp->inp_vflag |= INP_IPV4; 1047 #ifdef INET 1048 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1049 struct sockaddr_in sin; 1050 1051 in6_sin6_2_sin(&sin, sin6_p); 1052 inp->inp_vflag |= INP_IPV4; 1053 inp->inp_vflag &= ~INP_IPV6; 1054 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1055 td->td_ucred); 1056 goto out; 1057 } 1058 #endif 1059 } 1060 1061 error = in6_pcbbind(inp, nam, td->td_ucred); 1062 #ifdef INET 1063 out: 1064 #endif 1065 if (error != 0) 1066 inp->inp_vflag = vflagsav; 1067 INP_HASH_WUNLOCK(pcbinfo); 1068 INP_WUNLOCK(inp); 1069 return (error); 1070 } 1071 1072 static void 1073 udp6_close(struct socket *so) 1074 { 1075 struct inpcb *inp; 1076 struct inpcbinfo *pcbinfo; 1077 1078 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1079 inp = sotoinpcb(so); 1080 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1081 1082 INP_WLOCK(inp); 1083 #ifdef INET 1084 if (inp->inp_vflag & INP_IPV4) { 1085 INP_WUNLOCK(inp); 1086 (void)udp_disconnect(so); 1087 return; 1088 } 1089 #endif 1090 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1091 INP_HASH_WLOCK(pcbinfo); 1092 in6_pcbdisconnect(inp); 1093 inp->in6p_laddr = in6addr_any; 1094 INP_HASH_WUNLOCK(pcbinfo); 1095 soisdisconnected(so); 1096 } 1097 INP_WUNLOCK(inp); 1098 } 1099 1100 static int 1101 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1102 { 1103 #ifdef INET 1104 struct epoch_tracker et; 1105 #endif 1106 struct inpcb *inp; 1107 struct inpcbinfo *pcbinfo; 1108 struct sockaddr_in6 *sin6; 1109 int error; 1110 u_char vflagsav; 1111 1112 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1113 inp = sotoinpcb(so); 1114 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1115 1116 sin6 = (struct sockaddr_in6 *)nam; 1117 if (sin6->sin6_family != AF_INET6) 1118 return (EAFNOSUPPORT); 1119 if (sin6->sin6_len != sizeof(*sin6)) 1120 return (EINVAL); 1121 1122 /* 1123 * XXXRW: Need to clarify locking of v4/v6 flags. 1124 */ 1125 INP_WLOCK(inp); 1126 #ifdef INET 1127 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1128 struct sockaddr_in sin; 1129 1130 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1131 error = EINVAL; 1132 goto out; 1133 } 1134 if ((inp->inp_vflag & INP_IPV4) == 0) { 1135 error = EAFNOSUPPORT; 1136 goto out; 1137 } 1138 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1139 error = EISCONN; 1140 goto out; 1141 } 1142 in6_sin6_2_sin(&sin, sin6); 1143 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1144 if (error != 0) 1145 goto out; 1146 vflagsav = inp->inp_vflag; 1147 inp->inp_vflag |= INP_IPV4; 1148 inp->inp_vflag &= ~INP_IPV6; 1149 NET_EPOCH_ENTER(et); 1150 INP_HASH_WLOCK(pcbinfo); 1151 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1152 td->td_ucred, true); 1153 INP_HASH_WUNLOCK(pcbinfo); 1154 NET_EPOCH_EXIT(et); 1155 /* 1156 * If connect succeeds, mark socket as connected. If 1157 * connect fails and socket is unbound, reset inp_vflag 1158 * field. 1159 */ 1160 if (error == 0) 1161 soisconnected(so); 1162 else if (inp->inp_laddr.s_addr == INADDR_ANY && 1163 inp->inp_lport == 0) 1164 inp->inp_vflag = vflagsav; 1165 goto out; 1166 } else { 1167 if ((inp->inp_vflag & INP_IPV6) == 0) { 1168 error = EAFNOSUPPORT; 1169 goto out; 1170 } 1171 } 1172 #endif 1173 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1174 error = EISCONN; 1175 goto out; 1176 } 1177 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1178 if (error != 0) 1179 goto out; 1180 vflagsav = inp->inp_vflag; 1181 inp->inp_vflag &= ~INP_IPV4; 1182 inp->inp_vflag |= INP_IPV6; 1183 INP_HASH_WLOCK(pcbinfo); 1184 error = in6_pcbconnect(inp, nam, td->td_ucred); 1185 INP_HASH_WUNLOCK(pcbinfo); 1186 /* 1187 * If connect succeeds, mark socket as connected. If 1188 * connect fails and socket is unbound, reset inp_vflag 1189 * field. 1190 */ 1191 if (error == 0) 1192 soisconnected(so); 1193 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1194 inp->inp_lport == 0) 1195 inp->inp_vflag = vflagsav; 1196 out: 1197 INP_WUNLOCK(inp); 1198 return (error); 1199 } 1200 1201 static void 1202 udp6_detach(struct socket *so) 1203 { 1204 struct inpcb *inp; 1205 1206 inp = sotoinpcb(so); 1207 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1208 1209 INP_WLOCK(inp); 1210 in_pcbdetach(inp); 1211 in_pcbfree(inp); 1212 } 1213 1214 static int 1215 udp6_disconnect(struct socket *so) 1216 { 1217 struct inpcb *inp; 1218 struct inpcbinfo *pcbinfo; 1219 1220 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1221 inp = sotoinpcb(so); 1222 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1223 1224 INP_WLOCK(inp); 1225 #ifdef INET 1226 if (inp->inp_vflag & INP_IPV4) { 1227 INP_WUNLOCK(inp); 1228 (void)udp_disconnect(so); 1229 return (0); 1230 } 1231 #endif 1232 1233 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1234 INP_WUNLOCK(inp); 1235 return (ENOTCONN); 1236 } 1237 1238 INP_HASH_WLOCK(pcbinfo); 1239 in6_pcbdisconnect(inp); 1240 inp->in6p_laddr = in6addr_any; 1241 INP_HASH_WUNLOCK(pcbinfo); 1242 SOCK_LOCK(so); 1243 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1244 SOCK_UNLOCK(so); 1245 INP_WUNLOCK(inp); 1246 return (0); 1247 } 1248 1249 #define UDP6_PROTOSW \ 1250 .pr_type = SOCK_DGRAM, \ 1251 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1252 .pr_ctloutput = ip6_ctloutput, \ 1253 .pr_abort = udp6_abort, \ 1254 .pr_attach = udp6_attach, \ 1255 .pr_bind = udp6_bind, \ 1256 .pr_connect = udp6_connect, \ 1257 .pr_control = in6_control, \ 1258 .pr_detach = udp6_detach, \ 1259 .pr_disconnect = udp6_disconnect, \ 1260 .pr_peeraddr = in6_mapped_peeraddr, \ 1261 .pr_send = udp6_send, \ 1262 .pr_shutdown = udp_shutdown, \ 1263 .pr_sockaddr = in6_mapped_sockaddr, \ 1264 .pr_soreceive = soreceive_dgram, \ 1265 .pr_sosend = sosend_dgram, \ 1266 .pr_sosetlabel = in_pcbsosetlabel, \ 1267 .pr_close = udp6_close 1268 1269 struct protosw udp6_protosw = { 1270 .pr_protocol = IPPROTO_UDP, 1271 UDP6_PROTOSW 1272 }; 1273 1274 struct protosw udplite6_protosw = { 1275 .pr_protocol = IPPROTO_UDPLITE, 1276 UDP6_PROTOSW 1277 }; 1278 1279 static void 1280 udp6_init(void *arg __unused) 1281 { 1282 1283 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1284 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1285 } 1286 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1287