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 INP_RUNLOCK(inp); 316 break; 317 } else 318 appends++; 319 } 320 /* 321 * Don't look for additional matches if this one does 322 * not have either the SO_REUSEPORT or SO_REUSEADDR 323 * socket options set. This heuristic avoids 324 * searching through all pcbs in the common case of a 325 * non-shared port. It assumes that an application 326 * will never clear these options after setting them. 327 */ 328 if ((inp->inp_socket->so_options & 329 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { 330 INP_RUNLOCK(inp); 331 break; 332 } 333 } 334 m_freem(m); 335 336 if (appends == 0) { 337 /* 338 * No matching pcb found; discard datagram. (No need 339 * to send an ICMP Port Unreachable for a broadcast 340 * or multicast datgram.) 341 */ 342 UDPSTAT_INC(udps_noport); 343 UDPSTAT_INC(udps_noportmcast); 344 } 345 346 return (IPPROTO_DONE); 347 } 348 349 int 350 udp6_input(struct mbuf **mp, int *offp, int proto) 351 { 352 struct mbuf *m = *mp; 353 struct ip6_hdr *ip6; 354 struct udphdr *uh; 355 struct inpcb *inp; 356 struct inpcbinfo *pcbinfo; 357 struct udpcb *up; 358 int off = *offp; 359 int cscov_partial; 360 int plen, ulen; 361 struct sockaddr_in6 fromsa[2]; 362 struct m_tag *fwd_tag; 363 uint16_t uh_sum; 364 uint8_t nxt; 365 366 NET_EPOCH_ASSERT(); 367 368 if (m->m_len < off + sizeof(struct udphdr)) { 369 m = m_pullup(m, off + sizeof(struct udphdr)); 370 if (m == NULL) { 371 IP6STAT_INC(ip6s_exthdrtoolong); 372 *mp = NULL; 373 return (IPPROTO_DONE); 374 } 375 } 376 ip6 = mtod(m, struct ip6_hdr *); 377 uh = (struct udphdr *)((caddr_t)ip6 + off); 378 379 UDPSTAT_INC(udps_ipackets); 380 381 /* 382 * Destination port of 0 is illegal, based on RFC768. 383 */ 384 if (uh->uh_dport == 0) 385 goto badunlocked; 386 387 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 388 ulen = ntohs((u_short)uh->uh_ulen); 389 390 nxt = proto; 391 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 392 if (nxt == IPPROTO_UDPLITE) { 393 /* Zero means checksum over the complete packet. */ 394 if (ulen == 0) 395 ulen = plen; 396 if (ulen == plen) 397 cscov_partial = 0; 398 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 399 /* XXX: What is the right UDPLite MIB counter? */ 400 goto badunlocked; 401 } 402 if (uh->uh_sum == 0) { 403 /* XXX: What is the right UDPLite MIB counter? */ 404 goto badunlocked; 405 } 406 } else { 407 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 408 UDPSTAT_INC(udps_badlen); 409 goto badunlocked; 410 } 411 if (uh->uh_sum == 0) { 412 UDPSTAT_INC(udps_nosum); 413 /* 414 * dport 0 was rejected earlier so this is OK even if 415 * zero_checksum_port is 0 (which is its default value). 416 */ 417 if (ntohs(uh->uh_dport) == V_zero_checksum_port) 418 goto skip_checksum; 419 else 420 goto badunlocked; 421 } 422 } 423 424 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 425 !cscov_partial) { 426 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 427 uh_sum = m->m_pkthdr.csum_data; 428 else 429 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 430 m->m_pkthdr.csum_data); 431 uh_sum ^= 0xffff; 432 } else 433 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 434 435 if (uh_sum != 0) { 436 UDPSTAT_INC(udps_badsum); 437 goto badunlocked; 438 } 439 440 skip_checksum: 441 /* 442 * Construct sockaddr format source address. 443 */ 444 init_sin6(&fromsa[0], m, 0); 445 fromsa[0].sin6_port = uh->uh_sport; 446 init_sin6(&fromsa[1], m, 1); 447 fromsa[1].sin6_port = uh->uh_dport; 448 449 pcbinfo = udp_get_inpcbinfo(nxt); 450 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 451 *mp = NULL; 452 return (udp6_multi_input(m, off, proto, fromsa)); 453 } 454 455 /* 456 * Locate pcb for datagram. 457 */ 458 459 /* 460 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 461 */ 462 if ((m->m_flags & M_IP6_NEXTHOP) && 463 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 464 struct sockaddr_in6 *next_hop6; 465 466 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 467 468 /* 469 * Transparently forwarded. Pretend to be the destination. 470 * Already got one like this? 471 */ 472 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 473 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 474 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); 475 if (!inp) { 476 /* 477 * It's new. Try to find the ambushing socket. 478 * Because we've rewritten the destination address, 479 * any hardware-generated hash is ignored. 480 */ 481 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 482 uh->uh_sport, &next_hop6->sin6_addr, 483 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 484 uh->uh_dport, INPLOOKUP_WILDCARD | 485 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); 486 } 487 /* Remove the tag from the packet. We don't need it anymore. */ 488 m_tag_delete(m, fwd_tag); 489 m->m_flags &= ~M_IP6_NEXTHOP; 490 } else 491 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 492 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 493 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 494 m->m_pkthdr.rcvif, m); 495 if (inp == NULL) { 496 if (V_udp_log_in_vain) { 497 char ip6bufs[INET6_ADDRSTRLEN]; 498 char ip6bufd[INET6_ADDRSTRLEN]; 499 500 log(LOG_INFO, 501 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 502 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 503 ntohs(uh->uh_dport), 504 ip6_sprintf(ip6bufs, &ip6->ip6_src), 505 ntohs(uh->uh_sport)); 506 } 507 if (nxt == IPPROTO_UDPLITE) 508 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); 509 else 510 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); 511 UDPSTAT_INC(udps_noport); 512 if (m->m_flags & M_MCAST) { 513 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 514 UDPSTAT_INC(udps_noportmcast); 515 goto badunlocked; 516 } 517 if (V_udp_blackhole && (V_udp_blackhole_local || 518 !in6_localaddr(&ip6->ip6_src))) 519 goto badunlocked; 520 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 521 *mp = NULL; 522 return (IPPROTO_DONE); 523 } 524 INP_RLOCK_ASSERT(inp); 525 up = intoudpcb(inp); 526 if (cscov_partial) { 527 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 528 INP_RUNLOCK(inp); 529 m_freem(m); 530 *mp = NULL; 531 return (IPPROTO_DONE); 532 } 533 } 534 if (nxt == IPPROTO_UDPLITE) 535 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); 536 else 537 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 538 if (udp6_append(inp, m, off, fromsa) == 0) 539 INP_RUNLOCK(inp); 540 *mp = NULL; 541 return (IPPROTO_DONE); 542 543 badunlocked: 544 m_freem(m); 545 *mp = NULL; 546 return (IPPROTO_DONE); 547 } 548 549 static void 550 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) 551 { 552 struct udphdr uh; 553 struct ip6_hdr *ip6; 554 struct mbuf *m; 555 struct inpcb *inp; 556 int errno, off = 0; 557 struct udp_portonly { 558 u_int16_t uh_sport; 559 u_int16_t uh_dport; 560 } *uhp; 561 562 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0) 563 return; 564 565 m = ip6cp->ip6c_m; 566 ip6 = ip6cp->ip6c_ip6; 567 off = ip6cp->ip6c_off; 568 569 /* Check if we can safely examine src and dst ports. */ 570 if (m->m_pkthdr.len < off + sizeof(*uhp)) 571 return; 572 573 bzero(&uh, sizeof(uh)); 574 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 575 576 /* Check to see if its tunneled */ 577 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, 578 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 579 m->m_pkthdr.rcvif, m); 580 if (inp != NULL) { 581 struct udpcb *up; 582 udp_tun_icmp_t *func; 583 584 up = intoudpcb(inp); 585 func = up->u_icmp_func; 586 INP_RUNLOCK(inp); 587 if (func != NULL) 588 func(ip6cp); 589 } 590 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport, 591 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg, 592 udp_notify); 593 } 594 595 static void 596 udp6_ctlinput(struct ip6ctlparam *ctl) 597 { 598 599 return (udp6_common_ctlinput(ctl, &V_udbinfo)); 600 } 601 602 static void 603 udplite6_ctlinput(struct ip6ctlparam *ctl) 604 { 605 606 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo)); 607 } 608 609 static int 610 udp6_getcred(SYSCTL_HANDLER_ARGS) 611 { 612 struct xucred xuc; 613 struct sockaddr_in6 addrs[2]; 614 struct epoch_tracker et; 615 struct inpcb *inp; 616 int error; 617 618 error = priv_check(req->td, PRIV_NETINET_GETCRED); 619 if (error) 620 return (error); 621 622 if (req->newlen != sizeof(addrs)) 623 return (EINVAL); 624 if (req->oldlen != sizeof(struct xucred)) 625 return (EINVAL); 626 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 627 if (error) 628 return (error); 629 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 630 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 631 return (error); 632 } 633 NET_EPOCH_ENTER(et); 634 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 635 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 636 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 637 NET_EPOCH_EXIT(et); 638 if (inp != NULL) { 639 INP_RLOCK_ASSERT(inp); 640 if (inp->inp_socket == NULL) 641 error = ENOENT; 642 if (error == 0) 643 error = cr_canseesocket(req->td->td_ucred, 644 inp->inp_socket); 645 if (error == 0) 646 cru2x(inp->inp_cred, &xuc); 647 INP_RUNLOCK(inp); 648 } else 649 error = ENOENT; 650 if (error == 0) 651 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 652 return (error); 653 } 654 655 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, 656 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 657 0, 0, udp6_getcred, "S,xucred", 658 "Get the xucred of a UDP6 connection"); 659 660 static int 661 udp6_output(struct socket *so, int flags_arg, struct mbuf *m, 662 struct sockaddr *addr6, struct mbuf *control, struct thread *td) 663 { 664 struct inpcb *inp; 665 struct ip6_hdr *ip6; 666 struct udphdr *udp6; 667 struct in6_addr *laddr, *faddr, in6a; 668 struct ip6_pktopts *optp, opt; 669 struct sockaddr_in6 *sin6, tmp; 670 struct epoch_tracker et; 671 int cscov_partial, error, flags, hlen, scope_ambiguous; 672 u_int32_t ulen, plen; 673 uint16_t cscov; 674 u_short fport; 675 uint8_t nxt; 676 677 /* addr6 has been validated in udp6_send(). */ 678 sin6 = (struct sockaddr_in6 *)addr6; 679 680 /* 681 * In contrast to IPv4 we do not validate the max. packet length 682 * here due to IPv6 Jumbograms (RFC2675). 683 */ 684 685 scope_ambiguous = 0; 686 if (sin6) { 687 /* Protect *addr6 from overwrites. */ 688 tmp = *sin6; 689 sin6 = &tmp; 690 691 /* 692 * Application should provide a proper zone ID or the use of 693 * default zone IDs should be enabled. Unfortunately, some 694 * applications do not behave as it should, so we need a 695 * workaround. Even if an appropriate ID is not determined, 696 * we'll see if we can determine the outgoing interface. If we 697 * can, determine the zone ID based on the interface below. 698 */ 699 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 700 scope_ambiguous = 1; 701 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 702 if (control) 703 m_freem(control); 704 m_freem(m); 705 return (error); 706 } 707 } 708 709 inp = sotoinpcb(so); 710 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 711 /* 712 * In the following cases we want a write lock on the inp for either 713 * local operations or for possible route cache updates in the IPv6 714 * output path: 715 * - on connected sockets (sin6 is NULL) for route cache updates, 716 * - when we are not bound to an address and source port (it is 717 * in6_pcbsetport() which will require the write lock). 718 * 719 * We check the inp fields before actually locking the inp, so 720 * here exists a race, and we may WLOCK the inp and end with already 721 * bound one by other thread. This is fine. 722 */ 723 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 724 inp->inp_lport == 0)) 725 INP_WLOCK(inp); 726 else 727 INP_RLOCK(inp); 728 729 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 730 IPPROTO_UDP : IPPROTO_UDPLITE; 731 732 #ifdef INET 733 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 734 int hasv4addr; 735 736 if (sin6 == NULL) 737 hasv4addr = (inp->inp_vflag & INP_IPV4); 738 else 739 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 740 ? 1 : 0; 741 if (hasv4addr) { 742 /* 743 * XXXRW: We release UDP-layer locks before calling 744 * udp_send() in order to avoid recursion. However, 745 * this does mean there is a short window where inp's 746 * fields are unstable. Could this lead to a 747 * potential race in which the factors causing us to 748 * select the UDPv4 output routine are invalidated? 749 */ 750 INP_UNLOCK(inp); 751 if (sin6) 752 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 753 /* addr will just be freed in sendit(). */ 754 return (udp_send(so, flags_arg | PRUS_IPV6, m, 755 (struct sockaddr *)sin6, control, td)); 756 } 757 } else 758 #endif 759 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 760 /* 761 * Given this is either an IPv6-only socket or no INET is 762 * supported we will fail the send if the given destination 763 * address is a v4mapped address. 764 * 765 * XXXGL: do we leak m and control? 766 */ 767 INP_UNLOCK(inp); 768 return (EINVAL); 769 } 770 771 NET_EPOCH_ENTER(et); 772 if (control) { 773 if ((error = ip6_setpktopts(control, &opt, 774 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 775 goto release; 776 } 777 optp = &opt; 778 } else 779 optp = inp->in6p_outputopts; 780 781 if (sin6) { 782 /* 783 * Since we saw no essential reason for calling in_pcbconnect, 784 * we get rid of such kind of logic, and call in6_selectsrc 785 * and in6_pcbsetport in order to fill in the local address 786 * and the local port. 787 */ 788 if (sin6->sin6_port == 0) { 789 error = EADDRNOTAVAIL; 790 goto release; 791 } 792 793 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 794 /* how about ::ffff:0.0.0.0 case? */ 795 error = EISCONN; 796 goto release; 797 } 798 799 /* 800 * Given we handle the v4mapped case in the INET block above 801 * assert here that it must not happen anymore. 802 */ 803 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 804 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 805 "should have handled.", __func__, sin6)); 806 807 /* This only requires read-locking. */ 808 error = in6_selectsrc_socket(sin6, optp, inp, 809 td->td_ucred, scope_ambiguous, &in6a, NULL); 810 if (error) 811 goto release; 812 laddr = &in6a; 813 814 if (inp->inp_lport == 0) { 815 struct inpcbinfo *pcbinfo; 816 817 INP_WLOCK_ASSERT(inp); 818 819 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 820 INP_HASH_WLOCK(pcbinfo); 821 error = in6_pcbsetport(laddr, inp, td->td_ucred); 822 INP_HASH_WUNLOCK(pcbinfo); 823 if (error != 0) { 824 /* Undo an address bind that may have occurred. */ 825 inp->in6p_laddr = in6addr_any; 826 goto release; 827 } 828 } 829 faddr = &sin6->sin6_addr; 830 fport = sin6->sin6_port; /* allow 0 port */ 831 832 } else { 833 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 834 error = ENOTCONN; 835 goto release; 836 } 837 laddr = &inp->in6p_laddr; 838 faddr = &inp->in6p_faddr; 839 fport = inp->inp_fport; 840 } 841 842 ulen = m->m_pkthdr.len; 843 plen = sizeof(struct udphdr) + ulen; 844 hlen = sizeof(struct ip6_hdr); 845 846 /* 847 * Calculate data length and get a mbuf 848 * for UDP and IP6 headers. 849 */ 850 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 851 if (m == NULL) { 852 error = ENOBUFS; 853 goto release; 854 } 855 856 /* 857 * Stuff checksum and output datagram. 858 */ 859 cscov = cscov_partial = 0; 860 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 861 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 862 udp6->uh_dport = fport; 863 if (nxt == IPPROTO_UDPLITE) { 864 struct udpcb *up; 865 866 up = intoudpcb(inp); 867 cscov = up->u_txcslen; 868 if (cscov >= plen) 869 cscov = 0; 870 udp6->uh_ulen = htons(cscov); 871 /* 872 * For UDP-Lite, checksum coverage length of zero means 873 * the entire UDPLite packet is covered by the checksum. 874 */ 875 cscov_partial = (cscov == 0) ? 0 : 1; 876 } else if (plen <= 0xffff) 877 udp6->uh_ulen = htons((u_short)plen); 878 else 879 udp6->uh_ulen = 0; 880 udp6->uh_sum = 0; 881 882 ip6 = mtod(m, struct ip6_hdr *); 883 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 884 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 885 ip6->ip6_vfc |= IPV6_VERSION; 886 ip6->ip6_plen = htons((u_short)plen); 887 ip6->ip6_nxt = nxt; 888 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 889 ip6->ip6_src = *laddr; 890 ip6->ip6_dst = *faddr; 891 892 #ifdef MAC 893 mac_inpcb_create_mbuf(inp, m); 894 #endif 895 896 if (cscov_partial) { 897 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 898 sizeof(struct ip6_hdr), plen, cscov)) == 0) 899 udp6->uh_sum = 0xffff; 900 } else { 901 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 902 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 903 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 904 } 905 906 flags = 0; 907 #if defined(ROUTE_MPATH) || defined(RSS) 908 if (CALC_FLOWID_OUTBOUND_SENDTO) { 909 uint32_t hash_type, hash_val; 910 uint8_t pr; 911 912 pr = inp->inp_socket->so_proto->pr_protocol; 913 914 hash_val = fib6_calc_packet_hash(laddr, faddr, 915 inp->inp_lport, fport, pr, &hash_type); 916 m->m_pkthdr.flowid = hash_val; 917 M_HASHTYPE_SET(m, hash_type); 918 } 919 /* do not use inp flowid */ 920 flags |= IP_NODEFAULTFLOWID; 921 #endif 922 923 UDPSTAT_INC(udps_opackets); 924 if (nxt == IPPROTO_UDPLITE) 925 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 926 else 927 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 928 error = ip6_output(m, optp, 929 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 930 inp->in6p_moptions, NULL, inp); 931 INP_UNLOCK(inp); 932 NET_EPOCH_EXIT(et); 933 934 if (control) { 935 ip6_clearpktopts(&opt, -1); 936 m_freem(control); 937 } 938 return (error); 939 940 release: 941 INP_UNLOCK(inp); 942 NET_EPOCH_EXIT(et); 943 if (control) { 944 ip6_clearpktopts(&opt, -1); 945 m_freem(control); 946 } 947 m_freem(m); 948 949 return (error); 950 } 951 952 static void 953 udp6_abort(struct socket *so) 954 { 955 struct inpcb *inp; 956 struct inpcbinfo *pcbinfo; 957 958 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 959 inp = sotoinpcb(so); 960 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 961 962 INP_WLOCK(inp); 963 #ifdef INET 964 if (inp->inp_vflag & INP_IPV4) { 965 INP_WUNLOCK(inp); 966 udp_abort(so); 967 return; 968 } 969 #endif 970 971 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 972 INP_HASH_WLOCK(pcbinfo); 973 in6_pcbdisconnect(inp); 974 inp->in6p_laddr = in6addr_any; 975 INP_HASH_WUNLOCK(pcbinfo); 976 soisdisconnected(so); 977 } 978 INP_WUNLOCK(inp); 979 } 980 981 static int 982 udp6_attach(struct socket *so, int proto, struct thread *td) 983 { 984 struct inpcb *inp; 985 struct inpcbinfo *pcbinfo; 986 int error; 987 988 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 989 inp = sotoinpcb(so); 990 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 991 992 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 993 error = soreserve(so, udp_sendspace, udp_recvspace); 994 if (error) 995 return (error); 996 } 997 error = in_pcballoc(so, pcbinfo); 998 if (error) 999 return (error); 1000 inp = (struct inpcb *)so->so_pcb; 1001 inp->in6p_cksum = -1; /* just to be sure */ 1002 /* 1003 * XXX: ugly!! 1004 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1005 * because the socket may be bound to an IPv6 wildcard address, 1006 * which may match an IPv4-mapped IPv6 address. 1007 */ 1008 inp->inp_ip_ttl = V_ip_defttl; 1009 1010 error = udp_newudpcb(inp); 1011 if (error) { 1012 in_pcbdetach(inp); 1013 in_pcbfree(inp); 1014 return (error); 1015 } 1016 INP_WUNLOCK(inp); 1017 return (0); 1018 } 1019 1020 static int 1021 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1022 { 1023 struct inpcb *inp; 1024 struct inpcbinfo *pcbinfo; 1025 int error; 1026 u_char vflagsav; 1027 1028 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1029 inp = sotoinpcb(so); 1030 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1031 1032 if (nam->sa_family != AF_INET6) 1033 return (EAFNOSUPPORT); 1034 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1035 return (EINVAL); 1036 1037 INP_WLOCK(inp); 1038 INP_HASH_WLOCK(pcbinfo); 1039 vflagsav = inp->inp_vflag; 1040 inp->inp_vflag &= ~INP_IPV4; 1041 inp->inp_vflag |= INP_IPV6; 1042 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1043 struct sockaddr_in6 *sin6_p; 1044 1045 sin6_p = (struct sockaddr_in6 *)nam; 1046 1047 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1048 inp->inp_vflag |= INP_IPV4; 1049 #ifdef INET 1050 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1051 struct sockaddr_in sin; 1052 1053 in6_sin6_2_sin(&sin, sin6_p); 1054 inp->inp_vflag |= INP_IPV4; 1055 inp->inp_vflag &= ~INP_IPV6; 1056 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1057 td->td_ucred); 1058 goto out; 1059 } 1060 #endif 1061 } 1062 1063 error = in6_pcbbind(inp, nam, td->td_ucred); 1064 #ifdef INET 1065 out: 1066 #endif 1067 if (error != 0) 1068 inp->inp_vflag = vflagsav; 1069 INP_HASH_WUNLOCK(pcbinfo); 1070 INP_WUNLOCK(inp); 1071 return (error); 1072 } 1073 1074 static void 1075 udp6_close(struct socket *so) 1076 { 1077 struct inpcb *inp; 1078 struct inpcbinfo *pcbinfo; 1079 1080 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1081 inp = sotoinpcb(so); 1082 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1083 1084 INP_WLOCK(inp); 1085 #ifdef INET 1086 if (inp->inp_vflag & INP_IPV4) { 1087 INP_WUNLOCK(inp); 1088 (void)udp_disconnect(so); 1089 return; 1090 } 1091 #endif 1092 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1093 INP_HASH_WLOCK(pcbinfo); 1094 in6_pcbdisconnect(inp); 1095 inp->in6p_laddr = in6addr_any; 1096 INP_HASH_WUNLOCK(pcbinfo); 1097 soisdisconnected(so); 1098 } 1099 INP_WUNLOCK(inp); 1100 } 1101 1102 static int 1103 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1104 { 1105 #ifdef INET 1106 struct epoch_tracker et; 1107 #endif 1108 struct inpcb *inp; 1109 struct inpcbinfo *pcbinfo; 1110 struct sockaddr_in6 *sin6; 1111 int error; 1112 u_char vflagsav; 1113 1114 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1115 inp = sotoinpcb(so); 1116 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1117 1118 sin6 = (struct sockaddr_in6 *)nam; 1119 if (sin6->sin6_family != AF_INET6) 1120 return (EAFNOSUPPORT); 1121 if (sin6->sin6_len != sizeof(*sin6)) 1122 return (EINVAL); 1123 1124 /* 1125 * XXXRW: Need to clarify locking of v4/v6 flags. 1126 */ 1127 INP_WLOCK(inp); 1128 #ifdef INET 1129 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1130 struct sockaddr_in sin; 1131 1132 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1133 error = EINVAL; 1134 goto out; 1135 } 1136 if ((inp->inp_vflag & INP_IPV4) == 0) { 1137 error = EAFNOSUPPORT; 1138 goto out; 1139 } 1140 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1141 error = EISCONN; 1142 goto out; 1143 } 1144 in6_sin6_2_sin(&sin, sin6); 1145 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1146 if (error != 0) 1147 goto out; 1148 vflagsav = inp->inp_vflag; 1149 inp->inp_vflag |= INP_IPV4; 1150 inp->inp_vflag &= ~INP_IPV6; 1151 NET_EPOCH_ENTER(et); 1152 INP_HASH_WLOCK(pcbinfo); 1153 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1154 td->td_ucred, true); 1155 INP_HASH_WUNLOCK(pcbinfo); 1156 NET_EPOCH_EXIT(et); 1157 /* 1158 * If connect succeeds, mark socket as connected. If 1159 * connect fails and socket is unbound, reset inp_vflag 1160 * field. 1161 */ 1162 if (error == 0) 1163 soisconnected(so); 1164 else if (inp->inp_laddr.s_addr == INADDR_ANY && 1165 inp->inp_lport == 0) 1166 inp->inp_vflag = vflagsav; 1167 goto out; 1168 } else { 1169 if ((inp->inp_vflag & INP_IPV6) == 0) { 1170 error = EAFNOSUPPORT; 1171 goto out; 1172 } 1173 } 1174 #endif 1175 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1176 error = EISCONN; 1177 goto out; 1178 } 1179 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1180 if (error != 0) 1181 goto out; 1182 vflagsav = inp->inp_vflag; 1183 inp->inp_vflag &= ~INP_IPV4; 1184 inp->inp_vflag |= INP_IPV6; 1185 INP_HASH_WLOCK(pcbinfo); 1186 error = in6_pcbconnect(inp, nam, td->td_ucred); 1187 INP_HASH_WUNLOCK(pcbinfo); 1188 /* 1189 * If connect succeeds, mark socket as connected. If 1190 * connect fails and socket is unbound, reset inp_vflag 1191 * field. 1192 */ 1193 if (error == 0) 1194 soisconnected(so); 1195 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1196 inp->inp_lport == 0) 1197 inp->inp_vflag = vflagsav; 1198 out: 1199 INP_WUNLOCK(inp); 1200 return (error); 1201 } 1202 1203 static void 1204 udp6_detach(struct socket *so) 1205 { 1206 struct inpcb *inp; 1207 struct udpcb *up; 1208 1209 inp = sotoinpcb(so); 1210 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1211 1212 INP_WLOCK(inp); 1213 up = intoudpcb(inp); 1214 KASSERT(up != NULL, ("%s: up == NULL", __func__)); 1215 in_pcbdetach(inp); 1216 in_pcbfree(inp); 1217 udp_discardcb(up); 1218 } 1219 1220 static int 1221 udp6_disconnect(struct socket *so) 1222 { 1223 struct inpcb *inp; 1224 struct inpcbinfo *pcbinfo; 1225 1226 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1227 inp = sotoinpcb(so); 1228 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1229 1230 INP_WLOCK(inp); 1231 #ifdef INET 1232 if (inp->inp_vflag & INP_IPV4) { 1233 INP_WUNLOCK(inp); 1234 (void)udp_disconnect(so); 1235 return (0); 1236 } 1237 #endif 1238 1239 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1240 INP_WUNLOCK(inp); 1241 return (ENOTCONN); 1242 } 1243 1244 INP_HASH_WLOCK(pcbinfo); 1245 in6_pcbdisconnect(inp); 1246 inp->in6p_laddr = in6addr_any; 1247 INP_HASH_WUNLOCK(pcbinfo); 1248 SOCK_LOCK(so); 1249 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1250 SOCK_UNLOCK(so); 1251 INP_WUNLOCK(inp); 1252 return (0); 1253 } 1254 1255 static int 1256 udp6_send(struct socket *so, int flags, struct mbuf *m, 1257 struct sockaddr *addr, struct mbuf *control, struct thread *td) 1258 { 1259 int error; 1260 1261 if (addr) { 1262 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 1263 error = EINVAL; 1264 goto bad; 1265 } 1266 if (addr->sa_family != AF_INET6) { 1267 error = EAFNOSUPPORT; 1268 goto bad; 1269 } 1270 } 1271 1272 return (udp6_output(so, flags, m, addr, control, td)); 1273 1274 bad: 1275 if (control) 1276 m_freem(control); 1277 m_freem(m); 1278 return (error); 1279 } 1280 1281 #define UDP6_PROTOSW \ 1282 .pr_type = SOCK_DGRAM, \ 1283 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1284 .pr_ctloutput = ip6_ctloutput, \ 1285 .pr_abort = udp6_abort, \ 1286 .pr_attach = udp6_attach, \ 1287 .pr_bind = udp6_bind, \ 1288 .pr_connect = udp6_connect, \ 1289 .pr_control = in6_control, \ 1290 .pr_detach = udp6_detach, \ 1291 .pr_disconnect = udp6_disconnect, \ 1292 .pr_peeraddr = in6_mapped_peeraddr, \ 1293 .pr_send = udp6_send, \ 1294 .pr_shutdown = udp_shutdown, \ 1295 .pr_sockaddr = in6_mapped_sockaddr, \ 1296 .pr_soreceive = soreceive_dgram, \ 1297 .pr_sosend = sosend_dgram, \ 1298 .pr_sosetlabel = in_pcbsosetlabel, \ 1299 .pr_close = udp6_close 1300 1301 struct protosw udp6_protosw = { 1302 .pr_protocol = IPPROTO_UDP, 1303 UDP6_PROTOSW 1304 }; 1305 1306 struct protosw udplite6_protosw = { 1307 .pr_protocol = IPPROTO_UDPLITE, 1308 UDP6_PROTOSW 1309 }; 1310 1311 static void 1312 udp6_init(void *arg __unused) 1313 { 1314 1315 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1316 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1317 } 1318 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1319