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/domain.h> 79 #include <sys/jail.h> 80 #include <sys/kernel.h> 81 #include <sys/lock.h> 82 #include <sys/mbuf.h> 83 #include <sys/priv.h> 84 #include <sys/proc.h> 85 #include <sys/protosw.h> 86 #include <sys/sdt.h> 87 #include <sys/signalvar.h> 88 #include <sys/socket.h> 89 #include <sys/socketvar.h> 90 #include <sys/sx.h> 91 #include <sys/sysctl.h> 92 #include <sys/syslog.h> 93 #include <sys/systm.h> 94 95 #include <net/if.h> 96 #include <net/if_var.h> 97 #include <net/if_types.h> 98 #include <net/route.h> 99 #include <net/rss_config.h> 100 101 #include <netinet/in.h> 102 #include <netinet/in_kdtrace.h> 103 #include <netinet/in_pcb.h> 104 #include <netinet/in_systm.h> 105 #include <netinet/in_var.h> 106 #include <netinet/ip.h> 107 #include <netinet/ip6.h> 108 #include <netinet/icmp6.h> 109 #include <netinet/ip_var.h> 110 #include <netinet/udp.h> 111 #include <netinet/udp_var.h> 112 #include <netinet/udplite.h> 113 114 #include <netinet6/ip6_var.h> 115 #include <netinet6/in6_fib.h> 116 #include <netinet6/in6_pcb.h> 117 #include <netinet6/in6_rss.h> 118 #include <netinet6/udp6_var.h> 119 #include <netinet6/scope6_var.h> 120 121 #include <netipsec/ipsec_support.h> 122 123 #include <security/mac/mac_framework.h> 124 125 VNET_DEFINE(int, zero_checksum_port) = 0; 126 #define V_zero_checksum_port VNET(zero_checksum_port) 127 SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET | CTLFLAG_RW, 128 &VNET_NAME(zero_checksum_port), 0, 129 "Zero UDP checksum allowed for traffic to/from this port."); 130 131 /* 132 * UDP protocol implementation. 133 * Per RFC 768, August, 1980. 134 */ 135 136 static void udp6_detach(struct socket *so); 137 138 static int 139 udp6_append(struct inpcb *inp, struct mbuf *n, int off, 140 struct sockaddr_in6 *fromsa) 141 { 142 struct socket *so; 143 struct mbuf *opts = NULL, *tmp_opts; 144 struct udpcb *up; 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 bool filtered; 154 155 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 (in_pcbrele_rlocked(inp)) 161 return (1); 162 if (filtered) { 163 INP_RUNLOCK(inp); 164 return (1); 165 } 166 } 167 168 off += sizeof(struct udphdr); 169 170 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 171 /* Check AH/ESP integrity. */ 172 if (IPSEC_ENABLED(ipv6)) { 173 if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) { 174 m_freem(n); 175 return (0); 176 } 177 178 /* IPSec UDP encaps. */ 179 if ((up->u_flags & UF_ESPINUDP) != 0 && 180 UDPENCAP_INPUT(ipv6, n, off, AF_INET6) != 0) { 181 return (0); /* Consumed. */ 182 } 183 } 184 #endif /* IPSEC */ 185 #ifdef MAC 186 if (mac_inpcb_check_deliver(inp, n) != 0) { 187 m_freem(n); 188 return (0); 189 } 190 #endif 191 opts = NULL; 192 if (inp->inp_flags & INP_CONTROLOPTS || 193 inp->inp_socket->so_options & SO_TIMESTAMP) 194 ip6_savecontrol(inp, n, &opts); 195 if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { 196 tmp_opts = sbcreatecontrol(&fromsa[1], 197 sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, 198 IPPROTO_IPV6, M_NOWAIT); 199 if (tmp_opts) { 200 if (opts) { 201 tmp_opts->m_next = opts; 202 opts = tmp_opts; 203 } else 204 opts = tmp_opts; 205 } 206 } 207 m_adj(n, off); 208 209 so = inp->inp_socket; 210 SOCKBUF_LOCK(&so->so_rcv); 211 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n, 212 opts) == 0) { 213 soroverflow_locked(so); 214 m_freem(n); 215 if (opts) 216 m_freem(opts); 217 UDPSTAT_INC(udps_fullsock); 218 } else 219 sorwakeup_locked(so); 220 return (0); 221 } 222 223 struct udp6_multi_match_ctx { 224 struct ip6_hdr *ip6; 225 struct udphdr *uh; 226 }; 227 228 static bool 229 udp6_multi_match(const struct inpcb *inp, void *v) 230 { 231 struct udp6_multi_match_ctx *ctx = v; 232 233 if ((inp->inp_vflag & INP_IPV6) == 0) 234 return(false); 235 if (inp->inp_lport != ctx->uh->uh_dport) 236 return(false); 237 if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport) 238 return(false); 239 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 240 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst)) 241 return (false); 242 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 243 (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) || 244 inp->inp_fport != ctx->uh->uh_sport)) 245 return (false); 246 247 return (true); 248 } 249 250 static int 251 udp6_multi_input(struct mbuf *m, int off, int proto, 252 struct sockaddr_in6 *fromsa) 253 { 254 struct udp6_multi_match_ctx ctx; 255 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), 256 INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx); 257 struct inpcb *inp; 258 struct ip6_moptions *imo; 259 struct mbuf *n; 260 int appends = 0; 261 262 /* 263 * In the event that laddr should be set to the link-local 264 * address (this happens in RIPng), the multicast address 265 * specified in the received packet will not match laddr. To 266 * handle this situation, matching is relaxed if the 267 * receiving interface is the same as one specified in the 268 * socket and if the destination multicast address matches 269 * one of the multicast groups specified in the socket. 270 */ 271 272 /* 273 * KAME note: traditionally we dropped udpiphdr from mbuf 274 * here. We need udphdr for IPsec processing so we do that 275 * later. 276 */ 277 ctx.ip6 = mtod(m, struct ip6_hdr *); 278 ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off); 279 while ((inp = inp_next(&inpi)) != NULL) { 280 INP_RLOCK_ASSERT(inp); 281 /* 282 * XXXRW: Because we weren't holding either the inpcb 283 * or the hash lock when we checked for a match 284 * before, we should probably recheck now that the 285 * inpcb lock is (supposed to be) held. 286 */ 287 /* 288 * Handle socket delivery policy for any-source 289 * and source-specific multicast. [RFC3678] 290 */ 291 if ((imo = inp->in6p_moptions) != NULL) { 292 struct sockaddr_in6 mcaddr; 293 int blocked; 294 295 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 296 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 297 mcaddr.sin6_family = AF_INET6; 298 mcaddr.sin6_addr = ctx.ip6->ip6_dst; 299 300 blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif, 301 (struct sockaddr *)&mcaddr, 302 (struct sockaddr *)&fromsa[0]); 303 if (blocked != MCAST_PASS) { 304 if (blocked == MCAST_NOTGMEMBER) 305 IP6STAT_INC(ip6s_notmember); 306 if (blocked == MCAST_NOTSMEMBER || 307 blocked == MCAST_MUTED) 308 UDPSTAT_INC(udps_filtermcast); 309 continue; 310 } 311 } 312 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { 313 if (proto == IPPROTO_UDPLITE) 314 UDPLITE_PROBE(receive, NULL, inp, ctx.ip6, 315 inp, ctx.uh); 316 else 317 UDP_PROBE(receive, NULL, inp, ctx.ip6, inp, 318 ctx.uh); 319 if (udp6_append(inp, n, off, fromsa)) { 320 break; 321 } else 322 appends++; 323 } 324 /* 325 * Don't look for additional matches if this one does 326 * not have either the SO_REUSEPORT or SO_REUSEADDR 327 * socket options set. This heuristic avoids 328 * searching through all pcbs in the common case of a 329 * non-shared port. It assumes that an application 330 * will never clear these options after setting them. 331 */ 332 if ((inp->inp_socket->so_options & 333 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { 334 INP_RUNLOCK(inp); 335 break; 336 } 337 } 338 m_freem(m); 339 340 if (appends == 0) { 341 /* 342 * No matching pcb found; discard datagram. (No need 343 * to send an ICMP Port Unreachable for a broadcast 344 * or multicast datgram.) 345 */ 346 UDPSTAT_INC(udps_noport); 347 UDPSTAT_INC(udps_noportmcast); 348 } 349 350 return (IPPROTO_DONE); 351 } 352 353 int 354 udp6_input(struct mbuf **mp, int *offp, int proto) 355 { 356 struct mbuf *m = *mp; 357 struct ip6_hdr *ip6; 358 struct udphdr *uh; 359 struct inpcb *inp; 360 struct inpcbinfo *pcbinfo; 361 struct udpcb *up; 362 int off = *offp; 363 int cscov_partial; 364 int plen, ulen; 365 int lookupflags; 366 struct sockaddr_in6 fromsa[2]; 367 struct m_tag *fwd_tag; 368 uint16_t uh_sum; 369 uint8_t nxt; 370 371 NET_EPOCH_ASSERT(); 372 373 if (m->m_len < off + sizeof(struct udphdr)) { 374 m = m_pullup(m, off + sizeof(struct udphdr)); 375 if (m == NULL) { 376 IP6STAT_INC(ip6s_exthdrtoolong); 377 *mp = NULL; 378 return (IPPROTO_DONE); 379 } 380 } 381 ip6 = mtod(m, struct ip6_hdr *); 382 uh = (struct udphdr *)((caddr_t)ip6 + off); 383 384 UDPSTAT_INC(udps_ipackets); 385 386 /* 387 * Destination port of 0 is illegal, based on RFC768. 388 */ 389 if (uh->uh_dport == 0) 390 goto badunlocked; 391 392 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 393 ulen = ntohs((u_short)uh->uh_ulen); 394 395 nxt = proto; 396 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 397 if (nxt == IPPROTO_UDPLITE) { 398 /* Zero means checksum over the complete packet. */ 399 if (ulen == 0) 400 ulen = plen; 401 if (ulen == plen) 402 cscov_partial = 0; 403 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 404 /* XXX: What is the right UDPLite MIB counter? */ 405 goto badunlocked; 406 } 407 if (uh->uh_sum == 0) { 408 /* XXX: What is the right UDPLite MIB counter? */ 409 goto badunlocked; 410 } 411 } else { 412 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 413 UDPSTAT_INC(udps_badlen); 414 goto badunlocked; 415 } 416 if (uh->uh_sum == 0) { 417 UDPSTAT_INC(udps_nosum); 418 /* 419 * dport 0 was rejected earlier so this is OK even if 420 * zero_checksum_port is 0 (which is its default value). 421 */ 422 if (ntohs(uh->uh_dport) == V_zero_checksum_port) 423 goto skip_checksum; 424 else 425 goto badunlocked; 426 } 427 } 428 429 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 430 !cscov_partial) { 431 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 432 uh_sum = m->m_pkthdr.csum_data; 433 else 434 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 435 m->m_pkthdr.csum_data); 436 uh_sum ^= 0xffff; 437 } else if (m->m_pkthdr.csum_flags & CSUM_IP6_UDP) { 438 /* 439 * Packet from local host (maybe from a VM). 440 * Checksum not required. 441 */ 442 uh_sum = 0; 443 } else 444 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 445 446 if (uh_sum != 0) { 447 UDPSTAT_INC(udps_badsum); 448 goto badunlocked; 449 } 450 451 skip_checksum: 452 /* 453 * Construct sockaddr format source address. 454 */ 455 init_sin6(&fromsa[0], m, 0); 456 fromsa[0].sin6_port = uh->uh_sport; 457 init_sin6(&fromsa[1], m, 1); 458 fromsa[1].sin6_port = uh->uh_dport; 459 460 pcbinfo = udp_get_inpcbinfo(nxt); 461 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 462 *mp = NULL; 463 return (udp6_multi_input(m, off, proto, fromsa)); 464 } 465 466 /* 467 * Locate pcb for datagram. 468 */ 469 lookupflags = INPLOOKUP_RLOCKPCB | 470 (V_udp_bind_all_fibs ? 0 : INPLOOKUP_FIB); 471 472 /* 473 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 474 */ 475 if ((m->m_flags & M_IP6_NEXTHOP) && 476 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 477 struct sockaddr_in6 *next_hop6; 478 479 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 480 481 /* 482 * Transparently forwarded. Pretend to be the destination. 483 * Already got one like this? 484 */ 485 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 486 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 487 lookupflags, m->m_pkthdr.rcvif, m); 488 if (!inp) { 489 /* 490 * It's new. Try to find the ambushing socket. 491 * Because we've rewritten the destination address, 492 * any hardware-generated hash is ignored. 493 */ 494 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 495 uh->uh_sport, &next_hop6->sin6_addr, 496 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 497 uh->uh_dport, INPLOOKUP_WILDCARD | lookupflags, 498 m->m_pkthdr.rcvif); 499 } 500 /* Remove the tag from the packet. We don't need it anymore. */ 501 m_tag_delete(m, fwd_tag); 502 m->m_flags &= ~M_IP6_NEXTHOP; 503 } else 504 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 505 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 506 INPLOOKUP_WILDCARD | lookupflags, 507 m->m_pkthdr.rcvif, m); 508 if (inp == NULL) { 509 if (V_udp_log_in_vain) { 510 char ip6bufs[INET6_ADDRSTRLEN]; 511 char ip6bufd[INET6_ADDRSTRLEN]; 512 513 log(LOG_INFO, 514 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 515 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 516 ntohs(uh->uh_dport), 517 ip6_sprintf(ip6bufs, &ip6->ip6_src), 518 ntohs(uh->uh_sport)); 519 } 520 if (nxt == IPPROTO_UDPLITE) 521 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); 522 else 523 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); 524 UDPSTAT_INC(udps_noport); 525 if (m->m_flags & M_MCAST) { 526 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 527 UDPSTAT_INC(udps_noportmcast); 528 goto badunlocked; 529 } 530 if (V_udp_blackhole && (V_udp_blackhole_local || 531 !in6_localip(&ip6->ip6_src))) 532 goto badunlocked; 533 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 534 *mp = NULL; 535 return (IPPROTO_DONE); 536 } 537 INP_RLOCK_ASSERT(inp); 538 up = intoudpcb(inp); 539 if (cscov_partial) { 540 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 541 INP_RUNLOCK(inp); 542 m_freem(m); 543 *mp = NULL; 544 return (IPPROTO_DONE); 545 } 546 } 547 if (nxt == IPPROTO_UDPLITE) 548 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); 549 else 550 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 551 if (udp6_append(inp, m, off, fromsa) == 0) 552 INP_RUNLOCK(inp); 553 *mp = NULL; 554 return (IPPROTO_DONE); 555 556 badunlocked: 557 m_freem(m); 558 *mp = NULL; 559 return (IPPROTO_DONE); 560 } 561 562 static void 563 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) 564 { 565 struct udphdr uh; 566 struct ip6_hdr *ip6; 567 struct mbuf *m; 568 struct inpcb *inp; 569 int errno, off = 0; 570 struct udp_portonly { 571 u_int16_t uh_sport; 572 u_int16_t uh_dport; 573 } *uhp; 574 575 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0) 576 return; 577 578 m = ip6cp->ip6c_m; 579 ip6 = ip6cp->ip6c_ip6; 580 off = ip6cp->ip6c_off; 581 582 /* Check if we can safely examine src and dst ports. */ 583 if (m->m_pkthdr.len < off + sizeof(*uhp)) 584 return; 585 586 bzero(&uh, sizeof(uh)); 587 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 588 589 /* Check to see if its tunneled */ 590 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, 591 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 592 m->m_pkthdr.rcvif, m); 593 if (inp != NULL) { 594 struct udpcb *up; 595 udp_tun_icmp_t *func; 596 597 up = intoudpcb(inp); 598 func = up->u_icmp_func; 599 INP_RUNLOCK(inp); 600 if (func != NULL) 601 func(ip6cp); 602 } 603 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport, 604 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg, 605 udp_notify); 606 } 607 608 static void 609 udp6_ctlinput(struct ip6ctlparam *ctl) 610 { 611 612 return (udp6_common_ctlinput(ctl, &V_udbinfo)); 613 } 614 615 static void 616 udplite6_ctlinput(struct ip6ctlparam *ctl) 617 { 618 619 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo)); 620 } 621 622 static int 623 udp6_getcred(SYSCTL_HANDLER_ARGS) 624 { 625 struct xucred xuc; 626 struct sockaddr_in6 addrs[2]; 627 struct epoch_tracker et; 628 struct inpcb *inp; 629 int error; 630 631 if (req->newptr == NULL) 632 return (EINVAL); 633 error = priv_check(req->td, PRIV_NETINET_GETCRED); 634 if (error) 635 return (error); 636 637 if (req->newlen != sizeof(addrs)) 638 return (EINVAL); 639 if (req->oldlen != sizeof(struct xucred)) 640 return (EINVAL); 641 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 642 if (error) 643 return (error); 644 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 645 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 646 return (error); 647 } 648 NET_EPOCH_ENTER(et); 649 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 650 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 651 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 652 NET_EPOCH_EXIT(et); 653 if (inp != NULL) { 654 INP_RLOCK_ASSERT(inp); 655 if (inp->inp_socket == NULL) 656 error = ENOENT; 657 if (error == 0) 658 error = cr_canseesocket(req->td->td_ucred, 659 inp->inp_socket); 660 if (error == 0) 661 cru2x(inp->inp_cred, &xuc); 662 INP_RUNLOCK(inp); 663 } else 664 error = ENOENT; 665 if (error == 0) 666 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 667 return (error); 668 } 669 670 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, 671 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 672 0, 0, udp6_getcred, "S,xucred", 673 "Get the xucred of a UDP6 connection"); 674 675 static int 676 udp6_send(struct socket *so, int flags_arg, struct mbuf *m, 677 struct sockaddr *addr6, struct mbuf *control, struct thread *td) 678 { 679 struct inpcb *inp; 680 struct ip6_hdr *ip6; 681 struct udphdr *udp6; 682 struct in6_addr *laddr, *faddr, in6a; 683 struct ip6_pktopts *optp, opt; 684 struct sockaddr_in6 *sin6, tmp; 685 struct epoch_tracker et; 686 int cscov_partial, error, flags, hlen, scope_ambiguous; 687 u_int32_t ulen, plen; 688 uint16_t cscov; 689 u_short fport; 690 uint8_t nxt; 691 692 if (addr6) { 693 error = 0; 694 if (addr6->sa_family != AF_INET6) 695 error = EAFNOSUPPORT; 696 else if (addr6->sa_len != sizeof(struct sockaddr_in6)) 697 error = EINVAL; 698 if (__predict_false(error != 0)) { 699 m_freem(control); 700 m_freem(m); 701 return (error); 702 } 703 } 704 705 sin6 = (struct sockaddr_in6 *)addr6; 706 707 /* 708 * In contrast to IPv4 we do not validate the max. packet length 709 * here due to IPv6 Jumbograms (RFC2675). 710 */ 711 712 scope_ambiguous = 0; 713 if (sin6) { 714 /* Protect *addr6 from overwrites. */ 715 tmp = *sin6; 716 sin6 = &tmp; 717 718 /* 719 * Application should provide a proper zone ID or the use of 720 * default zone IDs should be enabled. Unfortunately, some 721 * applications do not behave as it should, so we need a 722 * workaround. Even if an appropriate ID is not determined, 723 * we'll see if we can determine the outgoing interface. If we 724 * can, determine the zone ID based on the interface below. 725 */ 726 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 727 scope_ambiguous = 1; 728 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 729 if (control) 730 m_freem(control); 731 m_freem(m); 732 return (error); 733 } 734 } 735 736 inp = sotoinpcb(so); 737 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 738 /* 739 * In the following cases we want a write lock on the inp for either 740 * local operations or for possible route cache updates in the IPv6 741 * output path: 742 * - on connected sockets (sin6 is NULL) for route cache updates, 743 * - when we are not bound to an address and source port (it is 744 * in6_pcbsetport() which will require the write lock). 745 * 746 * We check the inp fields before actually locking the inp, so 747 * here exists a race, and we may WLOCK the inp and end with already 748 * bound one by other thread. This is fine. 749 */ 750 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 751 inp->inp_lport == 0)) 752 INP_WLOCK(inp); 753 else 754 INP_RLOCK(inp); 755 756 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 757 IPPROTO_UDP : IPPROTO_UDPLITE; 758 759 #ifdef INET 760 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 761 int hasv4addr; 762 763 if (sin6 == NULL) 764 hasv4addr = (inp->inp_vflag & INP_IPV4); 765 else 766 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 767 ? 1 : 0; 768 if (hasv4addr) { 769 /* 770 * XXXRW: We release UDP-layer locks before calling 771 * udp_send() in order to avoid recursion. However, 772 * this does mean there is a short window where inp's 773 * fields are unstable. Could this lead to a 774 * potential race in which the factors causing us to 775 * select the UDPv4 output routine are invalidated? 776 */ 777 INP_UNLOCK(inp); 778 if (sin6) 779 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 780 /* addr will just be freed in sendit(). */ 781 return (udp_send(so, flags_arg | PRUS_IPV6, m, 782 (struct sockaddr *)sin6, control, td)); 783 } 784 } else 785 #endif 786 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 787 /* 788 * Given this is either an IPv6-only socket or no INET is 789 * supported we will fail the send if the given destination 790 * address is a v4mapped address. 791 */ 792 INP_UNLOCK(inp); 793 m_freem(m); 794 m_freem(control); 795 return (EINVAL); 796 } 797 798 NET_EPOCH_ENTER(et); 799 if (control) { 800 if ((error = ip6_setpktopts(control, &opt, 801 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 802 goto release; 803 } 804 optp = &opt; 805 } else 806 optp = inp->in6p_outputopts; 807 808 if (sin6) { 809 /* 810 * Since we saw no essential reason for calling in_pcbconnect, 811 * we get rid of such kind of logic, and call in6_selectsrc 812 * and in6_pcbsetport in order to fill in the local address 813 * and the local port. 814 */ 815 if (sin6->sin6_port == 0) { 816 error = EADDRNOTAVAIL; 817 goto release; 818 } 819 820 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 821 /* how about ::ffff:0.0.0.0 case? */ 822 error = EISCONN; 823 goto release; 824 } 825 826 /* 827 * Given we handle the v4mapped case in the INET block above 828 * assert here that it must not happen anymore. 829 */ 830 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 831 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 832 "should have handled.", __func__, sin6)); 833 834 /* This only requires read-locking. */ 835 error = in6_selectsrc_socket(sin6, optp, inp, 836 td->td_ucred, scope_ambiguous, &in6a, NULL); 837 if (error) 838 goto release; 839 laddr = &in6a; 840 841 if (inp->inp_lport == 0) { 842 struct inpcbinfo *pcbinfo; 843 844 INP_WLOCK_ASSERT(inp); 845 846 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 847 INP_HASH_WLOCK(pcbinfo); 848 error = in6_pcbsetport(laddr, inp, td->td_ucred); 849 INP_HASH_WUNLOCK(pcbinfo); 850 if (error != 0) { 851 /* Undo an address bind that may have occurred. */ 852 inp->in6p_laddr = in6addr_any; 853 goto release; 854 } 855 } 856 faddr = &sin6->sin6_addr; 857 fport = sin6->sin6_port; /* allow 0 port */ 858 859 } else { 860 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 861 error = ENOTCONN; 862 goto release; 863 } 864 laddr = &inp->in6p_laddr; 865 faddr = &inp->in6p_faddr; 866 fport = inp->inp_fport; 867 } 868 869 ulen = m->m_pkthdr.len; 870 plen = sizeof(struct udphdr) + ulen; 871 hlen = sizeof(struct ip6_hdr); 872 873 /* 874 * Calculate data length and get a mbuf for UDP, IP6, and possible 875 * link-layer headers. Immediate slide the data pointer back forward 876 * since we won't use that space at this layer. 877 */ 878 M_PREPEND(m, hlen + sizeof(struct udphdr) + max_linkhdr, M_NOWAIT); 879 if (m == NULL) { 880 error = ENOBUFS; 881 goto release; 882 } 883 m->m_data += max_linkhdr; 884 m->m_len -= max_linkhdr; 885 m->m_pkthdr.len -= max_linkhdr; 886 887 /* 888 * Stuff checksum and output datagram. 889 */ 890 cscov = cscov_partial = 0; 891 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 892 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 893 udp6->uh_dport = fport; 894 if (nxt == IPPROTO_UDPLITE) { 895 struct udpcb *up; 896 897 up = intoudpcb(inp); 898 cscov = up->u_txcslen; 899 if (cscov >= plen) 900 cscov = 0; 901 udp6->uh_ulen = htons(cscov); 902 /* 903 * For UDP-Lite, checksum coverage length of zero means 904 * the entire UDPLite packet is covered by the checksum. 905 */ 906 cscov_partial = (cscov == 0) ? 0 : 1; 907 } else if (plen <= 0xffff) 908 udp6->uh_ulen = htons((u_short)plen); 909 else 910 udp6->uh_ulen = 0; 911 udp6->uh_sum = 0; 912 913 ip6 = mtod(m, struct ip6_hdr *); 914 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 915 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 916 ip6->ip6_vfc |= IPV6_VERSION; 917 ip6->ip6_plen = htons((u_short)plen); 918 ip6->ip6_nxt = nxt; 919 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 920 ip6->ip6_src = *laddr; 921 ip6->ip6_dst = *faddr; 922 923 #ifdef MAC 924 mac_inpcb_create_mbuf(inp, m); 925 #endif 926 927 if (cscov_partial) { 928 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 929 sizeof(struct ip6_hdr), plen, cscov)) == 0) 930 udp6->uh_sum = 0xffff; 931 } else { 932 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 933 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 934 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 935 } 936 937 flags = 0; 938 #if defined(ROUTE_MPATH) || defined(RSS) 939 if (CALC_FLOWID_OUTBOUND_SENDTO) { 940 uint32_t hash_type, hash_val; 941 uint8_t pr; 942 943 pr = inp->inp_socket->so_proto->pr_protocol; 944 945 hash_val = fib6_calc_packet_hash(laddr, faddr, 946 inp->inp_lport, fport, pr, &hash_type); 947 m->m_pkthdr.flowid = hash_val; 948 M_HASHTYPE_SET(m, hash_type); 949 } 950 /* do not use inp flowid */ 951 flags |= IP_NODEFAULTFLOWID; 952 #endif 953 954 UDPSTAT_INC(udps_opackets); 955 if (nxt == IPPROTO_UDPLITE) 956 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 957 else 958 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 959 error = ip6_output(m, optp, 960 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 961 inp->in6p_moptions, NULL, inp); 962 INP_UNLOCK(inp); 963 NET_EPOCH_EXIT(et); 964 965 if (control) { 966 ip6_clearpktopts(&opt, -1); 967 m_freem(control); 968 } 969 return (error); 970 971 release: 972 INP_UNLOCK(inp); 973 NET_EPOCH_EXIT(et); 974 if (control) { 975 ip6_clearpktopts(&opt, -1); 976 m_freem(control); 977 } 978 m_freem(m); 979 980 return (error); 981 } 982 983 static void 984 udp6_abort(struct socket *so) 985 { 986 struct inpcb *inp; 987 struct inpcbinfo *pcbinfo; 988 989 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 990 inp = sotoinpcb(so); 991 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 992 993 INP_WLOCK(inp); 994 #ifdef INET 995 if (inp->inp_vflag & INP_IPV4) { 996 INP_WUNLOCK(inp); 997 udp_abort(so); 998 return; 999 } 1000 #endif 1001 1002 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1003 INP_HASH_WLOCK(pcbinfo); 1004 in6_pcbdisconnect(inp); 1005 INP_HASH_WUNLOCK(pcbinfo); 1006 soisdisconnected(so); 1007 } 1008 INP_WUNLOCK(inp); 1009 } 1010 1011 static int 1012 udp6_attach(struct socket *so, int proto, struct thread *td) 1013 { 1014 struct inpcbinfo *pcbinfo; 1015 struct inpcb *inp; 1016 struct udpcb *up; 1017 int error; 1018 1019 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1020 inp = sotoinpcb(so); 1021 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 1022 1023 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1024 error = soreserve(so, udp_sendspace, udp_recvspace); 1025 if (error) 1026 return (error); 1027 } 1028 error = in_pcballoc(so, pcbinfo); 1029 if (error) 1030 return (error); 1031 inp = (struct inpcb *)so->so_pcb; 1032 inp->in6p_cksum = -1; /* just to be sure */ 1033 /* 1034 * XXX: ugly!! 1035 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1036 * because the socket may be bound to an IPv6 wildcard address, 1037 * which may match an IPv4-mapped IPv6 address. 1038 */ 1039 inp->inp_ip_ttl = V_ip_defttl; 1040 up = intoudpcb(inp); 1041 bzero(&up->u_start_zero, u_zero_size); 1042 INP_WUNLOCK(inp); 1043 return (0); 1044 } 1045 1046 static int 1047 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1048 { 1049 struct sockaddr_in6 *sin6_p; 1050 struct inpcb *inp; 1051 struct inpcbinfo *pcbinfo; 1052 int error; 1053 u_char vflagsav; 1054 1055 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1056 inp = sotoinpcb(so); 1057 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1058 1059 if (nam->sa_family != AF_INET6) 1060 return (EAFNOSUPPORT); 1061 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1062 return (EINVAL); 1063 1064 sin6_p = (struct sockaddr_in6 *)nam; 1065 1066 INP_WLOCK(inp); 1067 INP_HASH_WLOCK(pcbinfo); 1068 vflagsav = inp->inp_vflag; 1069 inp->inp_vflag &= ~INP_IPV4; 1070 inp->inp_vflag |= INP_IPV6; 1071 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1072 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1073 inp->inp_vflag |= INP_IPV4; 1074 #ifdef INET 1075 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1076 struct sockaddr_in sin; 1077 1078 in6_sin6_2_sin(&sin, sin6_p); 1079 inp->inp_vflag |= INP_IPV4; 1080 inp->inp_vflag &= ~INP_IPV6; 1081 error = in_pcbbind(inp, &sin, 1082 V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1083 td->td_ucred); 1084 goto out; 1085 } 1086 #endif 1087 } 1088 1089 error = in6_pcbbind(inp, sin6_p, V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1090 td->td_ucred); 1091 #ifdef INET 1092 out: 1093 #endif 1094 if (error != 0) 1095 inp->inp_vflag = vflagsav; 1096 INP_HASH_WUNLOCK(pcbinfo); 1097 INP_WUNLOCK(inp); 1098 return (error); 1099 } 1100 1101 static void 1102 udp6_close(struct socket *so) 1103 { 1104 struct inpcb *inp; 1105 struct inpcbinfo *pcbinfo; 1106 1107 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1108 inp = sotoinpcb(so); 1109 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1110 1111 INP_WLOCK(inp); 1112 #ifdef INET 1113 if (inp->inp_vflag & INP_IPV4) { 1114 INP_WUNLOCK(inp); 1115 (void)udp_disconnect(so); 1116 return; 1117 } 1118 #endif 1119 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1120 INP_HASH_WLOCK(pcbinfo); 1121 in6_pcbdisconnect(inp); 1122 INP_HASH_WUNLOCK(pcbinfo); 1123 soisdisconnected(so); 1124 } 1125 INP_WUNLOCK(inp); 1126 } 1127 1128 static int 1129 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1130 { 1131 struct epoch_tracker et; 1132 struct inpcb *inp; 1133 struct inpcbinfo *pcbinfo; 1134 struct sockaddr_in6 *sin6; 1135 int error; 1136 u_char vflagsav; 1137 1138 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1139 inp = sotoinpcb(so); 1140 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1141 1142 sin6 = (struct sockaddr_in6 *)nam; 1143 if (sin6->sin6_family != AF_INET6) 1144 return (EAFNOSUPPORT); 1145 if (sin6->sin6_len != sizeof(*sin6)) 1146 return (EINVAL); 1147 1148 /* 1149 * XXXRW: Need to clarify locking of v4/v6 flags. 1150 */ 1151 INP_WLOCK(inp); 1152 #ifdef INET 1153 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1154 struct sockaddr_in sin; 1155 1156 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1157 error = EINVAL; 1158 goto out; 1159 } 1160 if ((inp->inp_vflag & INP_IPV4) == 0) { 1161 error = EAFNOSUPPORT; 1162 goto out; 1163 } 1164 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1165 error = EISCONN; 1166 goto out; 1167 } 1168 in6_sin6_2_sin(&sin, sin6); 1169 error = prison_remote_ip4(td->td_ucred, &sin.sin_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 = in_pcbconnect(inp, &sin, td->td_ucred); 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 (inp->inp_laddr.s_addr == INADDR_ANY && 1188 inp->inp_lport == 0) 1189 inp->inp_vflag = vflagsav; 1190 goto out; 1191 } else { 1192 if ((inp->inp_vflag & INP_IPV6) == 0) { 1193 error = EAFNOSUPPORT; 1194 goto out; 1195 } 1196 } 1197 #endif 1198 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1199 error = EISCONN; 1200 goto out; 1201 } 1202 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1203 if (error != 0) 1204 goto out; 1205 vflagsav = inp->inp_vflag; 1206 inp->inp_vflag &= ~INP_IPV4; 1207 inp->inp_vflag |= INP_IPV6; 1208 NET_EPOCH_ENTER(et); 1209 INP_HASH_WLOCK(pcbinfo); 1210 error = in6_pcbconnect(inp, sin6, td->td_ucred, true); 1211 INP_HASH_WUNLOCK(pcbinfo); 1212 NET_EPOCH_EXIT(et); 1213 /* 1214 * If connect succeeds, mark socket as connected. If 1215 * connect fails and socket is unbound, reset inp_vflag 1216 * field. 1217 */ 1218 if (error == 0) 1219 soisconnected(so); 1220 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1221 inp->inp_lport == 0) 1222 inp->inp_vflag = vflagsav; 1223 out: 1224 INP_WUNLOCK(inp); 1225 return (error); 1226 } 1227 1228 static void 1229 udp6_detach(struct socket *so) 1230 { 1231 struct inpcb *inp; 1232 1233 inp = sotoinpcb(so); 1234 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1235 1236 INP_WLOCK(inp); 1237 in_pcbfree(inp); 1238 } 1239 1240 static int 1241 udp6_disconnect(struct socket *so) 1242 { 1243 struct inpcb *inp; 1244 struct inpcbinfo *pcbinfo; 1245 1246 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1247 inp = sotoinpcb(so); 1248 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1249 1250 INP_WLOCK(inp); 1251 #ifdef INET 1252 if (inp->inp_vflag & INP_IPV4) { 1253 INP_WUNLOCK(inp); 1254 (void)udp_disconnect(so); 1255 return (0); 1256 } 1257 #endif 1258 1259 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1260 INP_WUNLOCK(inp); 1261 return (ENOTCONN); 1262 } 1263 1264 INP_HASH_WLOCK(pcbinfo); 1265 in6_pcbdisconnect(inp); 1266 INP_HASH_WUNLOCK(pcbinfo); 1267 SOCK_LOCK(so); 1268 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1269 SOCK_UNLOCK(so); 1270 INP_WUNLOCK(inp); 1271 return (0); 1272 } 1273 1274 #define UDP6_PROTOSW \ 1275 .pr_type = SOCK_DGRAM, \ 1276 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1277 .pr_ctloutput = udp_ctloutput, \ 1278 .pr_abort = udp6_abort, \ 1279 .pr_attach = udp6_attach, \ 1280 .pr_bind = udp6_bind, \ 1281 .pr_connect = udp6_connect, \ 1282 .pr_control = in6_control, \ 1283 .pr_detach = udp6_detach, \ 1284 .pr_disconnect = udp6_disconnect, \ 1285 .pr_peeraddr = in6_mapped_peeraddr, \ 1286 .pr_send = udp6_send, \ 1287 .pr_shutdown = udp_shutdown, \ 1288 .pr_sockaddr = in6_mapped_sockaddr, \ 1289 .pr_soreceive = soreceive_dgram, \ 1290 .pr_sosend = sosend_dgram, \ 1291 .pr_sosetlabel = in_pcbsosetlabel, \ 1292 .pr_close = udp6_close 1293 1294 struct protosw udp6_protosw = { 1295 .pr_protocol = IPPROTO_UDP, 1296 UDP6_PROTOSW 1297 }; 1298 1299 struct protosw udplite6_protosw = { 1300 .pr_protocol = IPPROTO_UDPLITE, 1301 UDP6_PROTOSW 1302 }; 1303 1304 static void 1305 udp6_init(void *arg __unused) 1306 { 1307 1308 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1309 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1310 } 1311 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1312