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 /* netinet/udp_usrreqs.c */ 136 pr_abort_t udp_abort; 137 pr_disconnect_t udp_disconnect; 138 pr_send_t udp_send; 139 140 /* 141 * UDP protocol implementation. 142 * Per RFC 768, August, 1980. 143 */ 144 145 static void udp6_detach(struct socket *so); 146 147 static int 148 udp6_append(struct inpcb *inp, struct mbuf *n, int off, 149 struct sockaddr_in6 *fromsa) 150 { 151 struct socket *so; 152 struct mbuf *opts = NULL, *tmp_opts; 153 struct udpcb *up; 154 bool filtered; 155 156 INP_LOCK_ASSERT(inp); 157 158 /* 159 * Engage the tunneling protocol. 160 */ 161 up = intoudpcb(inp); 162 if (up->u_tun_func != NULL) { 163 in_pcbref(inp); 164 INP_RUNLOCK(inp); 165 filtered = (*up->u_tun_func)(n, off, inp, 166 (struct sockaddr *)&fromsa[0], up->u_tun_ctx); 167 INP_RLOCK(inp); 168 if (filtered) 169 return (in_pcbrele_rlocked(inp)); 170 } 171 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 172 /* Check AH/ESP integrity. */ 173 if (IPSEC_ENABLED(ipv6)) { 174 if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) { 175 m_freem(n); 176 return (0); 177 } 178 } 179 #endif /* IPSEC */ 180 #ifdef MAC 181 if (mac_inpcb_check_deliver(inp, n) != 0) { 182 m_freem(n); 183 return (0); 184 } 185 #endif 186 opts = NULL; 187 if (inp->inp_flags & INP_CONTROLOPTS || 188 inp->inp_socket->so_options & SO_TIMESTAMP) 189 ip6_savecontrol(inp, n, &opts); 190 if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { 191 tmp_opts = sbcreatecontrol(&fromsa[1], 192 sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, 193 IPPROTO_IPV6, M_NOWAIT); 194 if (tmp_opts) { 195 if (opts) { 196 tmp_opts->m_next = opts; 197 opts = tmp_opts; 198 } else 199 opts = tmp_opts; 200 } 201 } 202 m_adj(n, off + sizeof(struct udphdr)); 203 204 so = inp->inp_socket; 205 SOCKBUF_LOCK(&so->so_rcv); 206 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n, 207 opts) == 0) { 208 soroverflow_locked(so); 209 m_freem(n); 210 if (opts) 211 m_freem(opts); 212 UDPSTAT_INC(udps_fullsock); 213 } else 214 sorwakeup_locked(so); 215 return (0); 216 } 217 218 struct udp6_multi_match_ctx { 219 struct ip6_hdr *ip6; 220 struct udphdr *uh; 221 }; 222 223 static bool 224 udp6_multi_match(const struct inpcb *inp, void *v) 225 { 226 struct udp6_multi_match_ctx *ctx = v; 227 228 if ((inp->inp_vflag & INP_IPV6) == 0) 229 return(false); 230 if (inp->inp_lport != ctx->uh->uh_dport) 231 return(false); 232 if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport) 233 return(false); 234 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 235 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst)) 236 return (false); 237 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 238 (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) || 239 inp->inp_fport != ctx->uh->uh_sport)) 240 return (false); 241 242 return (true); 243 } 244 245 static int 246 udp6_multi_input(struct mbuf *m, int off, int proto, 247 struct sockaddr_in6 *fromsa) 248 { 249 struct udp6_multi_match_ctx ctx; 250 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), 251 INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx); 252 struct inpcb *inp; 253 struct ip6_moptions *imo; 254 struct mbuf *n; 255 int appends = 0; 256 257 /* 258 * In the event that laddr should be set to the link-local 259 * address (this happens in RIPng), the multicast address 260 * specified in the received packet will not match laddr. To 261 * handle this situation, matching is relaxed if the 262 * receiving interface is the same as one specified in the 263 * socket and if the destination multicast address matches 264 * one of the multicast groups specified in the socket. 265 */ 266 267 /* 268 * KAME note: traditionally we dropped udpiphdr from mbuf 269 * here. We need udphdr for IPsec processing so we do that 270 * later. 271 */ 272 ctx.ip6 = mtod(m, struct ip6_hdr *); 273 ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off); 274 while ((inp = inp_next(&inpi)) != NULL) { 275 INP_RLOCK_ASSERT(inp); 276 /* 277 * XXXRW: Because we weren't holding either the inpcb 278 * or the hash lock when we checked for a match 279 * before, we should probably recheck now that the 280 * inpcb lock is (supposed to be) held. 281 */ 282 /* 283 * Handle socket delivery policy for any-source 284 * and source-specific multicast. [RFC3678] 285 */ 286 if ((imo = inp->in6p_moptions) != NULL) { 287 struct sockaddr_in6 mcaddr; 288 int blocked; 289 290 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 291 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 292 mcaddr.sin6_family = AF_INET6; 293 mcaddr.sin6_addr = ctx.ip6->ip6_dst; 294 295 blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif, 296 (struct sockaddr *)&mcaddr, 297 (struct sockaddr *)&fromsa[0]); 298 if (blocked != MCAST_PASS) { 299 if (blocked == MCAST_NOTGMEMBER) 300 IP6STAT_INC(ip6s_notmember); 301 if (blocked == MCAST_NOTSMEMBER || 302 blocked == MCAST_MUTED) 303 UDPSTAT_INC(udps_filtermcast); 304 continue; 305 } 306 } 307 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { 308 if (proto == IPPROTO_UDPLITE) 309 UDPLITE_PROBE(receive, NULL, inp, ctx.ip6, 310 inp, ctx.uh); 311 else 312 UDP_PROBE(receive, NULL, inp, ctx.ip6, inp, 313 ctx.uh); 314 if (udp6_append(inp, n, off, fromsa)) { 315 break; 316 } else 317 appends++; 318 } 319 /* 320 * Don't look for additional matches if this one does 321 * not have either the SO_REUSEPORT or SO_REUSEADDR 322 * socket options set. This heuristic avoids 323 * searching through all pcbs in the common case of a 324 * non-shared port. It assumes that an application 325 * will never clear these options after setting them. 326 */ 327 if ((inp->inp_socket->so_options & 328 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { 329 INP_RUNLOCK(inp); 330 break; 331 } 332 } 333 m_freem(m); 334 335 if (appends == 0) { 336 /* 337 * No matching pcb found; discard datagram. (No need 338 * to send an ICMP Port Unreachable for a broadcast 339 * or multicast datgram.) 340 */ 341 UDPSTAT_INC(udps_noport); 342 UDPSTAT_INC(udps_noportmcast); 343 } 344 345 return (IPPROTO_DONE); 346 } 347 348 int 349 udp6_input(struct mbuf **mp, int *offp, int proto) 350 { 351 struct mbuf *m = *mp; 352 struct ip6_hdr *ip6; 353 struct udphdr *uh; 354 struct inpcb *inp; 355 struct inpcbinfo *pcbinfo; 356 struct udpcb *up; 357 int off = *offp; 358 int cscov_partial; 359 int plen, ulen; 360 struct sockaddr_in6 fromsa[2]; 361 struct m_tag *fwd_tag; 362 uint16_t uh_sum; 363 uint8_t nxt; 364 365 NET_EPOCH_ASSERT(); 366 367 if (m->m_len < off + sizeof(struct udphdr)) { 368 m = m_pullup(m, off + sizeof(struct udphdr)); 369 if (m == NULL) { 370 IP6STAT_INC(ip6s_exthdrtoolong); 371 *mp = NULL; 372 return (IPPROTO_DONE); 373 } 374 } 375 ip6 = mtod(m, struct ip6_hdr *); 376 uh = (struct udphdr *)((caddr_t)ip6 + off); 377 378 UDPSTAT_INC(udps_ipackets); 379 380 /* 381 * Destination port of 0 is illegal, based on RFC768. 382 */ 383 if (uh->uh_dport == 0) 384 goto badunlocked; 385 386 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 387 ulen = ntohs((u_short)uh->uh_ulen); 388 389 nxt = proto; 390 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 391 if (nxt == IPPROTO_UDPLITE) { 392 /* Zero means checksum over the complete packet. */ 393 if (ulen == 0) 394 ulen = plen; 395 if (ulen == plen) 396 cscov_partial = 0; 397 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 398 /* XXX: What is the right UDPLite MIB counter? */ 399 goto badunlocked; 400 } 401 if (uh->uh_sum == 0) { 402 /* XXX: What is the right UDPLite MIB counter? */ 403 goto badunlocked; 404 } 405 } else { 406 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 407 UDPSTAT_INC(udps_badlen); 408 goto badunlocked; 409 } 410 if (uh->uh_sum == 0) { 411 UDPSTAT_INC(udps_nosum); 412 /* 413 * dport 0 was rejected earlier so this is OK even if 414 * zero_checksum_port is 0 (which is its default value). 415 */ 416 if (ntohs(uh->uh_dport) == V_zero_checksum_port) 417 goto skip_checksum; 418 else 419 goto badunlocked; 420 } 421 } 422 423 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 424 !cscov_partial) { 425 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 426 uh_sum = m->m_pkthdr.csum_data; 427 else 428 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 429 m->m_pkthdr.csum_data); 430 uh_sum ^= 0xffff; 431 } else 432 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 433 434 if (uh_sum != 0) { 435 UDPSTAT_INC(udps_badsum); 436 goto badunlocked; 437 } 438 439 skip_checksum: 440 /* 441 * Construct sockaddr format source address. 442 */ 443 init_sin6(&fromsa[0], m, 0); 444 fromsa[0].sin6_port = uh->uh_sport; 445 init_sin6(&fromsa[1], m, 1); 446 fromsa[1].sin6_port = uh->uh_dport; 447 448 pcbinfo = udp_get_inpcbinfo(nxt); 449 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 450 *mp = NULL; 451 return (udp6_multi_input(m, off, proto, fromsa)); 452 } 453 454 /* 455 * Locate pcb for datagram. 456 */ 457 458 /* 459 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 460 */ 461 if ((m->m_flags & M_IP6_NEXTHOP) && 462 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 463 struct sockaddr_in6 *next_hop6; 464 465 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 466 467 /* 468 * Transparently forwarded. Pretend to be the destination. 469 * Already got one like this? 470 */ 471 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 472 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 473 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); 474 if (!inp) { 475 /* 476 * It's new. Try to find the ambushing socket. 477 * Because we've rewritten the destination address, 478 * any hardware-generated hash is ignored. 479 */ 480 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 481 uh->uh_sport, &next_hop6->sin6_addr, 482 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 483 uh->uh_dport, INPLOOKUP_WILDCARD | 484 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); 485 } 486 /* Remove the tag from the packet. We don't need it anymore. */ 487 m_tag_delete(m, fwd_tag); 488 m->m_flags &= ~M_IP6_NEXTHOP; 489 } else 490 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 491 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 492 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 493 m->m_pkthdr.rcvif, m); 494 if (inp == NULL) { 495 if (V_udp_log_in_vain) { 496 char ip6bufs[INET6_ADDRSTRLEN]; 497 char ip6bufd[INET6_ADDRSTRLEN]; 498 499 log(LOG_INFO, 500 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 501 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 502 ntohs(uh->uh_dport), 503 ip6_sprintf(ip6bufs, &ip6->ip6_src), 504 ntohs(uh->uh_sport)); 505 } 506 if (nxt == IPPROTO_UDPLITE) 507 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); 508 else 509 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); 510 UDPSTAT_INC(udps_noport); 511 if (m->m_flags & M_MCAST) { 512 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 513 UDPSTAT_INC(udps_noportmcast); 514 goto badunlocked; 515 } 516 if (V_udp_blackhole && (V_udp_blackhole_local || 517 !in6_localaddr(&ip6->ip6_src))) 518 goto badunlocked; 519 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 520 *mp = NULL; 521 return (IPPROTO_DONE); 522 } 523 INP_RLOCK_ASSERT(inp); 524 up = intoudpcb(inp); 525 if (cscov_partial) { 526 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 527 INP_RUNLOCK(inp); 528 m_freem(m); 529 *mp = NULL; 530 return (IPPROTO_DONE); 531 } 532 } 533 if (nxt == IPPROTO_UDPLITE) 534 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); 535 else 536 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 537 if (udp6_append(inp, m, off, fromsa) == 0) 538 INP_RUNLOCK(inp); 539 *mp = NULL; 540 return (IPPROTO_DONE); 541 542 badunlocked: 543 m_freem(m); 544 *mp = NULL; 545 return (IPPROTO_DONE); 546 } 547 548 static void 549 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) 550 { 551 struct udphdr uh; 552 struct ip6_hdr *ip6; 553 struct mbuf *m; 554 struct inpcb *inp; 555 int errno, off = 0; 556 struct udp_portonly { 557 u_int16_t uh_sport; 558 u_int16_t uh_dport; 559 } *uhp; 560 561 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0) 562 return; 563 564 m = ip6cp->ip6c_m; 565 ip6 = ip6cp->ip6c_ip6; 566 off = ip6cp->ip6c_off; 567 568 /* Check if we can safely examine src and dst ports. */ 569 if (m->m_pkthdr.len < off + sizeof(*uhp)) 570 return; 571 572 bzero(&uh, sizeof(uh)); 573 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 574 575 /* Check to see if its tunneled */ 576 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, 577 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 578 m->m_pkthdr.rcvif, m); 579 if (inp != NULL) { 580 struct udpcb *up; 581 udp_tun_icmp_t *func; 582 583 up = intoudpcb(inp); 584 func = up->u_icmp_func; 585 INP_RUNLOCK(inp); 586 if (func != NULL) 587 func(ip6cp); 588 } 589 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport, 590 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg, 591 udp_notify); 592 } 593 594 static void 595 udp6_ctlinput(struct ip6ctlparam *ctl) 596 { 597 598 return (udp6_common_ctlinput(ctl, &V_udbinfo)); 599 } 600 601 static void 602 udplite6_ctlinput(struct ip6ctlparam *ctl) 603 { 604 605 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo)); 606 } 607 608 static int 609 udp6_getcred(SYSCTL_HANDLER_ARGS) 610 { 611 struct xucred xuc; 612 struct sockaddr_in6 addrs[2]; 613 struct epoch_tracker et; 614 struct inpcb *inp; 615 int error; 616 617 error = priv_check(req->td, PRIV_NETINET_GETCRED); 618 if (error) 619 return (error); 620 621 if (req->newlen != sizeof(addrs)) 622 return (EINVAL); 623 if (req->oldlen != sizeof(struct xucred)) 624 return (EINVAL); 625 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 626 if (error) 627 return (error); 628 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 629 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 630 return (error); 631 } 632 NET_EPOCH_ENTER(et); 633 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 634 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 635 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 636 NET_EPOCH_EXIT(et); 637 if (inp != NULL) { 638 INP_RLOCK_ASSERT(inp); 639 if (inp->inp_socket == NULL) 640 error = ENOENT; 641 if (error == 0) 642 error = cr_canseesocket(req->td->td_ucred, 643 inp->inp_socket); 644 if (error == 0) 645 cru2x(inp->inp_cred, &xuc); 646 INP_RUNLOCK(inp); 647 } else 648 error = ENOENT; 649 if (error == 0) 650 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 651 return (error); 652 } 653 654 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, 655 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 656 0, 0, udp6_getcred, "S,xucred", 657 "Get the xucred of a UDP6 connection"); 658 659 static int 660 udp6_output(struct socket *so, int flags_arg, struct mbuf *m, 661 struct sockaddr *addr6, struct mbuf *control, struct thread *td) 662 { 663 struct inpcb *inp; 664 struct ip6_hdr *ip6; 665 struct udphdr *udp6; 666 struct in6_addr *laddr, *faddr, in6a; 667 struct ip6_pktopts *optp, opt; 668 struct sockaddr_in6 *sin6, tmp; 669 struct epoch_tracker et; 670 int cscov_partial, error, flags, hlen, scope_ambiguous; 671 u_int32_t ulen, plen; 672 uint16_t cscov; 673 u_short fport; 674 uint8_t nxt; 675 676 /* addr6 has been validated in udp6_send(). */ 677 sin6 = (struct sockaddr_in6 *)addr6; 678 679 /* 680 * In contrast to IPv4 we do not validate the max. packet length 681 * here due to IPv6 Jumbograms (RFC2675). 682 */ 683 684 scope_ambiguous = 0; 685 if (sin6) { 686 /* Protect *addr6 from overwrites. */ 687 tmp = *sin6; 688 sin6 = &tmp; 689 690 /* 691 * Application should provide a proper zone ID or the use of 692 * default zone IDs should be enabled. Unfortunately, some 693 * applications do not behave as it should, so we need a 694 * workaround. Even if an appropriate ID is not determined, 695 * we'll see if we can determine the outgoing interface. If we 696 * can, determine the zone ID based on the interface below. 697 */ 698 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 699 scope_ambiguous = 1; 700 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 701 if (control) 702 m_freem(control); 703 m_freem(m); 704 return (error); 705 } 706 } 707 708 inp = sotoinpcb(so); 709 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 710 /* 711 * In the following cases we want a write lock on the inp for either 712 * local operations or for possible route cache updates in the IPv6 713 * output path: 714 * - on connected sockets (sin6 is NULL) for route cache updates, 715 * - when we are not bound to an address and source port (it is 716 * in6_pcbsetport() which will require the write lock). 717 * 718 * We check the inp fields before actually locking the inp, so 719 * here exists a race, and we may WLOCK the inp and end with already 720 * bound one by other thread. This is fine. 721 */ 722 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 723 inp->inp_lport == 0)) 724 INP_WLOCK(inp); 725 else 726 INP_RLOCK(inp); 727 728 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 729 IPPROTO_UDP : IPPROTO_UDPLITE; 730 731 #ifdef INET 732 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 733 int hasv4addr; 734 735 if (sin6 == NULL) 736 hasv4addr = (inp->inp_vflag & INP_IPV4); 737 else 738 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 739 ? 1 : 0; 740 if (hasv4addr) { 741 /* 742 * XXXRW: We release UDP-layer locks before calling 743 * udp_send() in order to avoid recursion. However, 744 * this does mean there is a short window where inp's 745 * fields are unstable. Could this lead to a 746 * potential race in which the factors causing us to 747 * select the UDPv4 output routine are invalidated? 748 */ 749 INP_UNLOCK(inp); 750 if (sin6) 751 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 752 /* addr will just be freed in sendit(). */ 753 return (udp_send(so, flags_arg | PRUS_IPV6, m, 754 (struct sockaddr *)sin6, control, td)); 755 } 756 } else 757 #endif 758 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 759 /* 760 * Given this is either an IPv6-only socket or no INET is 761 * supported we will fail the send if the given destination 762 * address is a v4mapped address. 763 * 764 * XXXGL: do we leak m and control? 765 */ 766 INP_UNLOCK(inp); 767 return (EINVAL); 768 } 769 770 NET_EPOCH_ENTER(et); 771 if (control) { 772 if ((error = ip6_setpktopts(control, &opt, 773 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 774 goto release; 775 } 776 optp = &opt; 777 } else 778 optp = inp->in6p_outputopts; 779 780 if (sin6) { 781 /* 782 * Since we saw no essential reason for calling in_pcbconnect, 783 * we get rid of such kind of logic, and call in6_selectsrc 784 * and in6_pcbsetport in order to fill in the local address 785 * and the local port. 786 */ 787 if (sin6->sin6_port == 0) { 788 error = EADDRNOTAVAIL; 789 goto release; 790 } 791 792 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 793 /* how about ::ffff:0.0.0.0 case? */ 794 error = EISCONN; 795 goto release; 796 } 797 798 /* 799 * Given we handle the v4mapped case in the INET block above 800 * assert here that it must not happen anymore. 801 */ 802 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 803 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 804 "should have handled.", __func__, sin6)); 805 806 /* This only requires read-locking. */ 807 error = in6_selectsrc_socket(sin6, optp, inp, 808 td->td_ucred, scope_ambiguous, &in6a, NULL); 809 if (error) 810 goto release; 811 laddr = &in6a; 812 813 if (inp->inp_lport == 0) { 814 struct inpcbinfo *pcbinfo; 815 816 INP_WLOCK_ASSERT(inp); 817 818 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 819 INP_HASH_WLOCK(pcbinfo); 820 error = in6_pcbsetport(laddr, inp, td->td_ucred); 821 INP_HASH_WUNLOCK(pcbinfo); 822 if (error != 0) { 823 /* Undo an address bind that may have occurred. */ 824 inp->in6p_laddr = in6addr_any; 825 goto release; 826 } 827 } 828 faddr = &sin6->sin6_addr; 829 fport = sin6->sin6_port; /* allow 0 port */ 830 831 } else { 832 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 833 error = ENOTCONN; 834 goto release; 835 } 836 laddr = &inp->in6p_laddr; 837 faddr = &inp->in6p_faddr; 838 fport = inp->inp_fport; 839 } 840 841 ulen = m->m_pkthdr.len; 842 plen = sizeof(struct udphdr) + ulen; 843 hlen = sizeof(struct ip6_hdr); 844 845 /* 846 * Calculate data length and get a mbuf 847 * for UDP and IP6 headers. 848 */ 849 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 850 if (m == NULL) { 851 error = ENOBUFS; 852 goto release; 853 } 854 855 /* 856 * Stuff checksum and output datagram. 857 */ 858 cscov = cscov_partial = 0; 859 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 860 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 861 udp6->uh_dport = fport; 862 if (nxt == IPPROTO_UDPLITE) { 863 struct udpcb *up; 864 865 up = intoudpcb(inp); 866 cscov = up->u_txcslen; 867 if (cscov >= plen) 868 cscov = 0; 869 udp6->uh_ulen = htons(cscov); 870 /* 871 * For UDP-Lite, checksum coverage length of zero means 872 * the entire UDPLite packet is covered by the checksum. 873 */ 874 cscov_partial = (cscov == 0) ? 0 : 1; 875 } else if (plen <= 0xffff) 876 udp6->uh_ulen = htons((u_short)plen); 877 else 878 udp6->uh_ulen = 0; 879 udp6->uh_sum = 0; 880 881 ip6 = mtod(m, struct ip6_hdr *); 882 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 883 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 884 ip6->ip6_vfc |= IPV6_VERSION; 885 ip6->ip6_plen = htons((u_short)plen); 886 ip6->ip6_nxt = nxt; 887 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 888 ip6->ip6_src = *laddr; 889 ip6->ip6_dst = *faddr; 890 891 #ifdef MAC 892 mac_inpcb_create_mbuf(inp, m); 893 #endif 894 895 if (cscov_partial) { 896 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 897 sizeof(struct ip6_hdr), plen, cscov)) == 0) 898 udp6->uh_sum = 0xffff; 899 } else { 900 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 901 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 902 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 903 } 904 905 flags = 0; 906 #if defined(ROUTE_MPATH) || defined(RSS) 907 if (CALC_FLOWID_OUTBOUND_SENDTO) { 908 uint32_t hash_type, hash_val; 909 uint8_t pr; 910 911 pr = inp->inp_socket->so_proto->pr_protocol; 912 913 hash_val = fib6_calc_packet_hash(laddr, faddr, 914 inp->inp_lport, fport, pr, &hash_type); 915 m->m_pkthdr.flowid = hash_val; 916 M_HASHTYPE_SET(m, hash_type); 917 } 918 /* do not use inp flowid */ 919 flags |= IP_NODEFAULTFLOWID; 920 #endif 921 922 UDPSTAT_INC(udps_opackets); 923 if (nxt == IPPROTO_UDPLITE) 924 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 925 else 926 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 927 error = ip6_output(m, optp, 928 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 929 inp->in6p_moptions, NULL, inp); 930 INP_UNLOCK(inp); 931 NET_EPOCH_EXIT(et); 932 933 if (control) { 934 ip6_clearpktopts(&opt, -1); 935 m_freem(control); 936 } 937 return (error); 938 939 release: 940 INP_UNLOCK(inp); 941 NET_EPOCH_EXIT(et); 942 if (control) { 943 ip6_clearpktopts(&opt, -1); 944 m_freem(control); 945 } 946 m_freem(m); 947 948 return (error); 949 } 950 951 static void 952 udp6_abort(struct socket *so) 953 { 954 struct inpcb *inp; 955 struct inpcbinfo *pcbinfo; 956 957 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 958 inp = sotoinpcb(so); 959 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 960 961 INP_WLOCK(inp); 962 #ifdef INET 963 if (inp->inp_vflag & INP_IPV4) { 964 INP_WUNLOCK(inp); 965 udp_abort(so); 966 return; 967 } 968 #endif 969 970 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 971 INP_HASH_WLOCK(pcbinfo); 972 in6_pcbdisconnect(inp); 973 inp->in6p_laddr = in6addr_any; 974 INP_HASH_WUNLOCK(pcbinfo); 975 soisdisconnected(so); 976 } 977 INP_WUNLOCK(inp); 978 } 979 980 static int 981 udp6_attach(struct socket *so, int proto, struct thread *td) 982 { 983 struct inpcb *inp; 984 struct inpcbinfo *pcbinfo; 985 int error; 986 987 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 988 inp = sotoinpcb(so); 989 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 990 991 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 992 error = soreserve(so, udp_sendspace, udp_recvspace); 993 if (error) 994 return (error); 995 } 996 error = in_pcballoc(so, pcbinfo); 997 if (error) 998 return (error); 999 inp = (struct inpcb *)so->so_pcb; 1000 inp->in6p_cksum = -1; /* just to be sure */ 1001 /* 1002 * XXX: ugly!! 1003 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1004 * because the socket may be bound to an IPv6 wildcard address, 1005 * which may match an IPv4-mapped IPv6 address. 1006 */ 1007 inp->inp_ip_ttl = V_ip_defttl; 1008 1009 error = udp_newudpcb(inp); 1010 if (error) { 1011 in_pcbdetach(inp); 1012 in_pcbfree(inp); 1013 return (error); 1014 } 1015 INP_WUNLOCK(inp); 1016 return (0); 1017 } 1018 1019 static int 1020 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1021 { 1022 struct inpcb *inp; 1023 struct inpcbinfo *pcbinfo; 1024 int error; 1025 u_char vflagsav; 1026 1027 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1028 inp = sotoinpcb(so); 1029 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1030 1031 if (nam->sa_family != AF_INET6) 1032 return (EAFNOSUPPORT); 1033 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1034 return (EINVAL); 1035 1036 INP_WLOCK(inp); 1037 INP_HASH_WLOCK(pcbinfo); 1038 vflagsav = inp->inp_vflag; 1039 inp->inp_vflag &= ~INP_IPV4; 1040 inp->inp_vflag |= INP_IPV6; 1041 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1042 struct sockaddr_in6 *sin6_p; 1043 1044 sin6_p = (struct sockaddr_in6 *)nam; 1045 1046 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1047 inp->inp_vflag |= INP_IPV4; 1048 #ifdef INET 1049 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1050 struct sockaddr_in sin; 1051 1052 in6_sin6_2_sin(&sin, sin6_p); 1053 inp->inp_vflag |= INP_IPV4; 1054 inp->inp_vflag &= ~INP_IPV6; 1055 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1056 td->td_ucred); 1057 goto out; 1058 } 1059 #endif 1060 } 1061 1062 error = in6_pcbbind(inp, nam, td->td_ucred); 1063 #ifdef INET 1064 out: 1065 #endif 1066 if (error != 0) 1067 inp->inp_vflag = vflagsav; 1068 INP_HASH_WUNLOCK(pcbinfo); 1069 INP_WUNLOCK(inp); 1070 return (error); 1071 } 1072 1073 static void 1074 udp6_close(struct socket *so) 1075 { 1076 struct inpcb *inp; 1077 struct inpcbinfo *pcbinfo; 1078 1079 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1080 inp = sotoinpcb(so); 1081 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1082 1083 INP_WLOCK(inp); 1084 #ifdef INET 1085 if (inp->inp_vflag & INP_IPV4) { 1086 INP_WUNLOCK(inp); 1087 (void)udp_disconnect(so); 1088 return; 1089 } 1090 #endif 1091 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1092 INP_HASH_WLOCK(pcbinfo); 1093 in6_pcbdisconnect(inp); 1094 inp->in6p_laddr = in6addr_any; 1095 INP_HASH_WUNLOCK(pcbinfo); 1096 soisdisconnected(so); 1097 } 1098 INP_WUNLOCK(inp); 1099 } 1100 1101 static int 1102 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1103 { 1104 #ifdef INET 1105 struct epoch_tracker et; 1106 #endif 1107 struct inpcb *inp; 1108 struct inpcbinfo *pcbinfo; 1109 struct sockaddr_in6 *sin6; 1110 int error; 1111 u_char vflagsav; 1112 1113 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1114 inp = sotoinpcb(so); 1115 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1116 1117 sin6 = (struct sockaddr_in6 *)nam; 1118 if (sin6->sin6_family != AF_INET6) 1119 return (EAFNOSUPPORT); 1120 if (sin6->sin6_len != sizeof(*sin6)) 1121 return (EINVAL); 1122 1123 /* 1124 * XXXRW: Need to clarify locking of v4/v6 flags. 1125 */ 1126 INP_WLOCK(inp); 1127 #ifdef INET 1128 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1129 struct sockaddr_in sin; 1130 1131 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1132 error = EINVAL; 1133 goto out; 1134 } 1135 if ((inp->inp_vflag & INP_IPV4) == 0) { 1136 error = EAFNOSUPPORT; 1137 goto out; 1138 } 1139 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1140 error = EISCONN; 1141 goto out; 1142 } 1143 in6_sin6_2_sin(&sin, sin6); 1144 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1145 if (error != 0) 1146 goto out; 1147 vflagsav = inp->inp_vflag; 1148 inp->inp_vflag |= INP_IPV4; 1149 inp->inp_vflag &= ~INP_IPV6; 1150 NET_EPOCH_ENTER(et); 1151 INP_HASH_WLOCK(pcbinfo); 1152 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1153 td->td_ucred, true); 1154 INP_HASH_WUNLOCK(pcbinfo); 1155 NET_EPOCH_EXIT(et); 1156 /* 1157 * If connect succeeds, mark socket as connected. If 1158 * connect fails and socket is unbound, reset inp_vflag 1159 * field. 1160 */ 1161 if (error == 0) 1162 soisconnected(so); 1163 else if (inp->inp_laddr.s_addr == INADDR_ANY && 1164 inp->inp_lport == 0) 1165 inp->inp_vflag = vflagsav; 1166 goto out; 1167 } else { 1168 if ((inp->inp_vflag & INP_IPV6) == 0) { 1169 error = EAFNOSUPPORT; 1170 goto out; 1171 } 1172 } 1173 #endif 1174 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1175 error = EISCONN; 1176 goto out; 1177 } 1178 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1179 if (error != 0) 1180 goto out; 1181 vflagsav = inp->inp_vflag; 1182 inp->inp_vflag &= ~INP_IPV4; 1183 inp->inp_vflag |= INP_IPV6; 1184 INP_HASH_WLOCK(pcbinfo); 1185 error = in6_pcbconnect(inp, nam, td->td_ucred); 1186 INP_HASH_WUNLOCK(pcbinfo); 1187 /* 1188 * If connect succeeds, mark socket as connected. If 1189 * connect fails and socket is unbound, reset inp_vflag 1190 * field. 1191 */ 1192 if (error == 0) 1193 soisconnected(so); 1194 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1195 inp->inp_lport == 0) 1196 inp->inp_vflag = vflagsav; 1197 out: 1198 INP_WUNLOCK(inp); 1199 return (error); 1200 } 1201 1202 static void 1203 udp6_detach(struct socket *so) 1204 { 1205 struct inpcb *inp; 1206 struct udpcb *up; 1207 1208 inp = sotoinpcb(so); 1209 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1210 1211 INP_WLOCK(inp); 1212 up = intoudpcb(inp); 1213 KASSERT(up != NULL, ("%s: up == NULL", __func__)); 1214 in_pcbdetach(inp); 1215 in_pcbfree(inp); 1216 udp_discardcb(up); 1217 } 1218 1219 static int 1220 udp6_disconnect(struct socket *so) 1221 { 1222 struct inpcb *inp; 1223 struct inpcbinfo *pcbinfo; 1224 1225 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1226 inp = sotoinpcb(so); 1227 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1228 1229 INP_WLOCK(inp); 1230 #ifdef INET 1231 if (inp->inp_vflag & INP_IPV4) { 1232 INP_WUNLOCK(inp); 1233 (void)udp_disconnect(so); 1234 return (0); 1235 } 1236 #endif 1237 1238 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1239 INP_WUNLOCK(inp); 1240 return (ENOTCONN); 1241 } 1242 1243 INP_HASH_WLOCK(pcbinfo); 1244 in6_pcbdisconnect(inp); 1245 inp->in6p_laddr = in6addr_any; 1246 INP_HASH_WUNLOCK(pcbinfo); 1247 SOCK_LOCK(so); 1248 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1249 SOCK_UNLOCK(so); 1250 INP_WUNLOCK(inp); 1251 return (0); 1252 } 1253 1254 static int 1255 udp6_send(struct socket *so, int flags, struct mbuf *m, 1256 struct sockaddr *addr, struct mbuf *control, struct thread *td) 1257 { 1258 int error; 1259 1260 if (addr) { 1261 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 1262 error = EINVAL; 1263 goto bad; 1264 } 1265 if (addr->sa_family != AF_INET6) { 1266 error = EAFNOSUPPORT; 1267 goto bad; 1268 } 1269 } 1270 1271 return (udp6_output(so, flags, m, addr, control, td)); 1272 1273 bad: 1274 if (control) 1275 m_freem(control); 1276 m_freem(m); 1277 return (error); 1278 } 1279 1280 #define UDP6_PROTOSW \ 1281 .pr_type = SOCK_DGRAM, \ 1282 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1283 .pr_ctloutput = ip6_ctloutput, \ 1284 .pr_abort = udp6_abort, \ 1285 .pr_attach = udp6_attach, \ 1286 .pr_bind = udp6_bind, \ 1287 .pr_connect = udp6_connect, \ 1288 .pr_control = in6_control, \ 1289 .pr_detach = udp6_detach, \ 1290 .pr_disconnect = udp6_disconnect, \ 1291 .pr_peeraddr = in6_mapped_peeraddr, \ 1292 .pr_send = udp6_send, \ 1293 .pr_shutdown = udp_shutdown, \ 1294 .pr_sockaddr = in6_mapped_sockaddr, \ 1295 .pr_soreceive = soreceive_dgram, \ 1296 .pr_sosend = sosend_dgram, \ 1297 .pr_sosetlabel = in_pcbsosetlabel, \ 1298 .pr_close = udp6_close 1299 1300 struct protosw udp6_protosw = { 1301 .pr_protocol = IPPROTO_UDP, 1302 UDP6_PROTOSW 1303 }; 1304 1305 struct protosw udplite6_protosw = { 1306 .pr_protocol = IPPROTO_UDPLITE, 1307 UDP6_PROTOSW 1308 }; 1309 1310 static void 1311 udp6_init(void *arg __unused) 1312 { 1313 1314 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1315 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1316 } 1317 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1318