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