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