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 "opt_inet.h" 71 #include "opt_inet6.h" 72 #include "opt_ipsec.h" 73 #include "opt_route.h" 74 #include "opt_rss.h" 75 76 #include <sys/param.h> 77 #include <sys/domain.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; 144 145 INP_LOCK_ASSERT(inp); 146 147 /* 148 * Engage the tunneling protocol. 149 */ 150 up = intoudpcb(inp); 151 if (up->u_tun_func != NULL) { 152 bool filtered; 153 154 in_pcbref(inp); 155 INP_RUNLOCK(inp); 156 filtered = (*up->u_tun_func)(n, off, inp, 157 (struct sockaddr *)&fromsa[0], up->u_tun_ctx); 158 INP_RLOCK(inp); 159 if (in_pcbrele_rlocked(inp)) 160 return (1); 161 if (filtered) { 162 INP_RUNLOCK(inp); 163 return (1); 164 } 165 } 166 167 off += sizeof(struct udphdr); 168 169 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 170 /* Check AH/ESP integrity. */ 171 if (IPSEC_ENABLED(ipv6)) { 172 if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) { 173 m_freem(n); 174 return (0); 175 } 176 177 /* IPSec UDP encaps. */ 178 if ((up->u_flags & UF_ESPINUDP) != 0 && 179 UDPENCAP_INPUT(ipv6, n, off, AF_INET6) != 0) { 180 return (0); /* Consumed. */ 181 } 182 } 183 #endif /* IPSEC */ 184 #ifdef MAC 185 if (mac_inpcb_check_deliver(inp, n) != 0) { 186 m_freem(n); 187 return (0); 188 } 189 #endif 190 opts = NULL; 191 if (inp->inp_flags & INP_CONTROLOPTS || 192 inp->inp_socket->so_options & SO_TIMESTAMP) 193 ip6_savecontrol(inp, n, &opts); 194 if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { 195 tmp_opts = sbcreatecontrol(&fromsa[1], 196 sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, 197 IPPROTO_IPV6, M_NOWAIT); 198 if (tmp_opts) { 199 if (opts) { 200 tmp_opts->m_next = opts; 201 opts = tmp_opts; 202 } else 203 opts = tmp_opts; 204 } 205 } 206 m_adj(n, off); 207 208 so = inp->inp_socket; 209 SOCKBUF_LOCK(&so->so_rcv); 210 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n, 211 opts) == 0) { 212 soroverflow_locked(so); 213 m_freem(n); 214 if (opts) 215 m_freem(opts); 216 UDPSTAT_INC(udps_fullsock); 217 } else 218 sorwakeup_locked(so); 219 return (0); 220 } 221 222 struct udp6_multi_match_ctx { 223 struct ip6_hdr *ip6; 224 struct udphdr *uh; 225 }; 226 227 static bool 228 udp6_multi_match(const struct inpcb *inp, void *v) 229 { 230 struct udp6_multi_match_ctx *ctx = v; 231 232 if ((inp->inp_vflag & INP_IPV6) == 0) 233 return(false); 234 if (inp->inp_lport != ctx->uh->uh_dport) 235 return(false); 236 if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport) 237 return(false); 238 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 239 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst)) 240 return (false); 241 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 242 (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) || 243 inp->inp_fport != ctx->uh->uh_sport)) 244 return (false); 245 246 return (true); 247 } 248 249 static int 250 udp6_multi_input(struct mbuf *m, int off, int proto, 251 struct sockaddr_in6 *fromsa) 252 { 253 struct udp6_multi_match_ctx ctx; 254 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), 255 INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx); 256 struct inpcb *inp; 257 struct ip6_moptions *imo; 258 struct mbuf *n; 259 int appends = 0; 260 261 /* 262 * In the event that laddr should be set to the link-local 263 * address (this happens in RIPng), the multicast address 264 * specified in the received packet will not match laddr. To 265 * handle this situation, matching is relaxed if the 266 * receiving interface is the same as one specified in the 267 * socket and if the destination multicast address matches 268 * one of the multicast groups specified in the socket. 269 */ 270 271 /* 272 * KAME note: traditionally we dropped udpiphdr from mbuf 273 * here. We need udphdr for IPsec processing so we do that 274 * later. 275 */ 276 ctx.ip6 = mtod(m, struct ip6_hdr *); 277 ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off); 278 while ((inp = inp_next(&inpi)) != NULL) { 279 INP_RLOCK_ASSERT(inp); 280 /* 281 * XXXRW: Because we weren't holding either the inpcb 282 * or the hash lock when we checked for a match 283 * before, we should probably recheck now that the 284 * inpcb lock is (supposed to be) held. 285 */ 286 /* 287 * Handle socket delivery policy for any-source 288 * and source-specific multicast. [RFC3678] 289 */ 290 if ((imo = inp->in6p_moptions) != NULL) { 291 struct sockaddr_in6 mcaddr; 292 int blocked; 293 294 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 295 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 296 mcaddr.sin6_family = AF_INET6; 297 mcaddr.sin6_addr = ctx.ip6->ip6_dst; 298 299 blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif, 300 (struct sockaddr *)&mcaddr, 301 (struct sockaddr *)&fromsa[0]); 302 if (blocked != MCAST_PASS) { 303 if (blocked == MCAST_NOTGMEMBER) 304 IP6STAT_INC(ip6s_notmember); 305 if (blocked == MCAST_NOTSMEMBER || 306 blocked == MCAST_MUTED) 307 UDPSTAT_INC(udps_filtermcast); 308 continue; 309 } 310 } 311 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { 312 if (proto == IPPROTO_UDPLITE) 313 UDPLITE_PROBE(receive, NULL, inp, ctx.ip6, 314 inp, ctx.uh); 315 else 316 UDP_PROBE(receive, NULL, inp, ctx.ip6, inp, 317 ctx.uh); 318 if (udp6_append(inp, n, off, fromsa)) { 319 break; 320 } else 321 appends++; 322 } 323 /* 324 * Don't look for additional matches if this one does 325 * not have either the SO_REUSEPORT or SO_REUSEADDR 326 * socket options set. This heuristic avoids 327 * searching through all pcbs in the common case of a 328 * non-shared port. It assumes that an application 329 * will never clear these options after setting them. 330 */ 331 if ((inp->inp_socket->so_options & 332 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { 333 INP_RUNLOCK(inp); 334 break; 335 } 336 } 337 m_freem(m); 338 339 if (appends == 0) { 340 /* 341 * No matching pcb found; discard datagram. (No need 342 * to send an ICMP Port Unreachable for a broadcast 343 * or multicast datagram.) 344 */ 345 UDPSTAT_INC(udps_noport); 346 UDPSTAT_INC(udps_noportmcast); 347 } 348 349 return (IPPROTO_DONE); 350 } 351 352 int 353 udp6_input(struct mbuf **mp, int *offp, int proto) 354 { 355 struct mbuf *m = *mp; 356 struct ip6_hdr *ip6; 357 struct udphdr *uh; 358 struct inpcb *inp; 359 struct inpcbinfo *pcbinfo; 360 struct udpcb *up; 361 int off = *offp; 362 int cscov_partial; 363 int plen, ulen; 364 int lookupflags; 365 struct sockaddr_in6 fromsa[2]; 366 struct m_tag *fwd_tag; 367 uint16_t uh_sum; 368 uint8_t nxt; 369 370 NET_EPOCH_ASSERT(); 371 372 if (m->m_len < off + sizeof(struct udphdr)) { 373 m = m_pullup(m, off + sizeof(struct udphdr)); 374 if (m == NULL) { 375 IP6STAT_INC(ip6s_exthdrtoolong); 376 *mp = NULL; 377 return (IPPROTO_DONE); 378 } 379 } 380 ip6 = mtod(m, struct ip6_hdr *); 381 uh = (struct udphdr *)((caddr_t)ip6 + off); 382 383 UDPSTAT_INC(udps_ipackets); 384 385 /* 386 * Destination port of 0 is illegal, based on RFC768. 387 */ 388 if (uh->uh_dport == 0) 389 goto badunlocked; 390 391 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 392 ulen = ntohs((u_short)uh->uh_ulen); 393 394 nxt = proto; 395 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 396 if (nxt == IPPROTO_UDPLITE) { 397 /* Zero means checksum over the complete packet. */ 398 if (ulen == 0) 399 ulen = plen; 400 if (ulen == plen) 401 cscov_partial = 0; 402 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 403 /* XXX: What is the right UDPLite MIB counter? */ 404 goto badunlocked; 405 } 406 if (uh->uh_sum == 0) { 407 /* XXX: What is the right UDPLite MIB counter? */ 408 goto badunlocked; 409 } 410 } else { 411 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 412 UDPSTAT_INC(udps_badlen); 413 goto badunlocked; 414 } 415 if (uh->uh_sum == 0) { 416 UDPSTAT_INC(udps_nosum); 417 /* 418 * dport 0 was rejected earlier so this is OK even if 419 * zero_checksum_port is 0 (which is its default value). 420 */ 421 if (ntohs(uh->uh_dport) == V_zero_checksum_port) 422 goto skip_checksum; 423 else 424 goto badunlocked; 425 } 426 } 427 428 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 429 !cscov_partial) { 430 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 431 uh_sum = m->m_pkthdr.csum_data; 432 else 433 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 434 m->m_pkthdr.csum_data); 435 uh_sum ^= 0xffff; 436 } else if (m->m_pkthdr.csum_flags & CSUM_IP6_UDP) { 437 /* 438 * Packet from local host (maybe from a VM). 439 * Checksum not required. 440 */ 441 uh_sum = 0; 442 } else 443 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 444 445 if (uh_sum != 0) { 446 UDPSTAT_INC(udps_badsum); 447 goto badunlocked; 448 } 449 450 skip_checksum: 451 /* 452 * Construct sockaddr format source address. 453 */ 454 init_sin6(&fromsa[0], m, 0); 455 fromsa[0].sin6_port = uh->uh_sport; 456 init_sin6(&fromsa[1], m, 1); 457 fromsa[1].sin6_port = uh->uh_dport; 458 459 pcbinfo = udp_get_inpcbinfo(nxt); 460 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 461 *mp = NULL; 462 return (udp6_multi_input(m, off, proto, fromsa)); 463 } 464 465 /* 466 * Locate pcb for datagram. 467 */ 468 lookupflags = INPLOOKUP_RLOCKPCB | 469 (V_udp_bind_all_fibs ? 0 : INPLOOKUP_FIB); 470 471 /* 472 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 473 */ 474 if ((m->m_flags & M_IP6_NEXTHOP) && 475 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 476 struct sockaddr_in6 *next_hop6; 477 478 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 479 480 /* 481 * Transparently forwarded. Pretend to be the destination. 482 * Already got one like this? 483 */ 484 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 485 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 486 lookupflags, m->m_pkthdr.rcvif, m); 487 if (!inp) { 488 /* 489 * It's new. Try to find the ambushing socket. 490 * Because we've rewritten the destination address, 491 * any hardware-generated hash is ignored. 492 */ 493 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 494 uh->uh_sport, &next_hop6->sin6_addr, 495 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 496 uh->uh_dport, INPLOOKUP_WILDCARD | lookupflags, 497 m->m_pkthdr.rcvif); 498 } 499 /* Remove the tag from the packet. We don't need it anymore. */ 500 m_tag_delete(m, fwd_tag); 501 m->m_flags &= ~M_IP6_NEXTHOP; 502 } else 503 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 504 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 505 INPLOOKUP_WILDCARD | lookupflags, 506 m->m_pkthdr.rcvif, m); 507 if (inp == NULL) { 508 if (V_udp_log_in_vain) { 509 char ip6bufs[INET6_ADDRSTRLEN]; 510 char ip6bufd[INET6_ADDRSTRLEN]; 511 512 log(LOG_INFO, 513 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 514 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 515 ntohs(uh->uh_dport), 516 ip6_sprintf(ip6bufs, &ip6->ip6_src), 517 ntohs(uh->uh_sport)); 518 } 519 if (nxt == IPPROTO_UDPLITE) 520 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); 521 else 522 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); 523 UDPSTAT_INC(udps_noport); 524 if (m->m_flags & M_MCAST) { 525 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 526 UDPSTAT_INC(udps_noportmcast); 527 goto badunlocked; 528 } 529 if (V_udp_blackhole && (V_udp_blackhole_local || 530 !in6_localip(&ip6->ip6_src))) 531 goto badunlocked; 532 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 533 *mp = NULL; 534 return (IPPROTO_DONE); 535 } 536 INP_RLOCK_ASSERT(inp); 537 up = intoudpcb(inp); 538 if (cscov_partial) { 539 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 540 INP_RUNLOCK(inp); 541 m_freem(m); 542 *mp = NULL; 543 return (IPPROTO_DONE); 544 } 545 } 546 if (nxt == IPPROTO_UDPLITE) 547 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); 548 else 549 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 550 if (udp6_append(inp, m, off, fromsa) == 0) 551 INP_RUNLOCK(inp); 552 *mp = NULL; 553 return (IPPROTO_DONE); 554 555 badunlocked: 556 m_freem(m); 557 *mp = NULL; 558 return (IPPROTO_DONE); 559 } 560 561 static void 562 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) 563 { 564 struct udphdr uh; 565 struct ip6_hdr *ip6; 566 struct mbuf *m; 567 struct inpcb *inp; 568 int errno, off = 0; 569 struct udp_portonly { 570 u_int16_t uh_sport; 571 u_int16_t uh_dport; 572 } *uhp; 573 574 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0) 575 return; 576 577 m = ip6cp->ip6c_m; 578 ip6 = ip6cp->ip6c_ip6; 579 off = ip6cp->ip6c_off; 580 581 /* Check if we can safely examine src and dst ports. */ 582 if (m->m_pkthdr.len < off + sizeof(*uhp)) 583 return; 584 585 bzero(&uh, sizeof(uh)); 586 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 587 588 /* Check to see if its tunneled */ 589 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, 590 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 591 m->m_pkthdr.rcvif, m); 592 if (inp != NULL) { 593 struct udpcb *up; 594 udp_tun_icmp_t *func; 595 596 up = intoudpcb(inp); 597 func = up->u_icmp_func; 598 INP_RUNLOCK(inp); 599 if (func != NULL) 600 func(ip6cp); 601 } 602 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport, 603 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg, 604 udp_notify); 605 } 606 607 static void 608 udp6_ctlinput(struct ip6ctlparam *ctl) 609 { 610 611 return (udp6_common_ctlinput(ctl, &V_udbinfo)); 612 } 613 614 static void 615 udplite6_ctlinput(struct ip6ctlparam *ctl) 616 { 617 618 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo)); 619 } 620 621 static int 622 udp6_getcred(SYSCTL_HANDLER_ARGS) 623 { 624 struct xucred xuc; 625 struct sockaddr_in6 addrs[2]; 626 struct epoch_tracker et; 627 struct inpcb *inp; 628 int error; 629 630 if (req->newptr == NULL) 631 return (EINVAL); 632 error = priv_check(req->td, PRIV_NETINET_GETCRED); 633 if (error) 634 return (error); 635 636 if (req->newlen != sizeof(addrs)) 637 return (EINVAL); 638 if (req->oldlen != sizeof(struct xucred)) 639 return (EINVAL); 640 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 641 if (error) 642 return (error); 643 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 644 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 645 return (error); 646 } 647 NET_EPOCH_ENTER(et); 648 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 649 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 650 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 651 NET_EPOCH_EXIT(et); 652 if (inp != NULL) { 653 INP_RLOCK_ASSERT(inp); 654 if (inp->inp_socket == NULL) 655 error = ENOENT; 656 if (error == 0) 657 error = cr_canseesocket(req->td->td_ucred, 658 inp->inp_socket); 659 if (error == 0) 660 cru2x(inp->inp_cred, &xuc); 661 INP_RUNLOCK(inp); 662 } else 663 error = ENOENT; 664 if (error == 0) 665 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 666 return (error); 667 } 668 669 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, 670 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 671 0, 0, udp6_getcred, "S,xucred", 672 "Get the xucred of a UDP6 connection"); 673 674 static int 675 udp6_send(struct socket *so, int flags_arg, struct mbuf *m, 676 struct sockaddr *addr6, struct mbuf *control, struct thread *td) 677 { 678 struct inpcb *inp; 679 struct ip6_hdr *ip6; 680 struct udphdr *udp6; 681 struct in6_addr *laddr, *faddr, in6a; 682 struct ip6_pktopts *optp, opt; 683 struct sockaddr_in6 *sin6, tmp; 684 struct epoch_tracker et; 685 int cscov_partial, error, flags, hlen, scope_ambiguous; 686 u_int32_t ulen, plen; 687 uint16_t cscov; 688 u_short fport; 689 uint8_t nxt; 690 691 if (addr6) { 692 error = 0; 693 if (addr6->sa_family != AF_INET6) 694 error = EAFNOSUPPORT; 695 else if (addr6->sa_len != sizeof(struct sockaddr_in6)) 696 error = EINVAL; 697 if (__predict_false(error != 0)) { 698 m_freem(control); 699 m_freem(m); 700 return (error); 701 } 702 } 703 704 sin6 = (struct sockaddr_in6 *)addr6; 705 706 /* 707 * In contrast to IPv4 we do not validate the max. packet length 708 * here due to IPv6 Jumbograms (RFC2675). 709 */ 710 711 scope_ambiguous = 0; 712 if (sin6) { 713 /* Protect *addr6 from overwrites. */ 714 tmp = *sin6; 715 sin6 = &tmp; 716 717 /* 718 * Application should provide a proper zone ID or the use of 719 * default zone IDs should be enabled. Unfortunately, some 720 * applications do not behave as it should, so we need a 721 * workaround. Even if an appropriate ID is not determined, 722 * we'll see if we can determine the outgoing interface. If we 723 * can, determine the zone ID based on the interface below. 724 */ 725 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 726 scope_ambiguous = 1; 727 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 728 if (control) 729 m_freem(control); 730 m_freem(m); 731 return (error); 732 } 733 } 734 735 inp = sotoinpcb(so); 736 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 737 /* 738 * In the following cases we want a write lock on the inp for either 739 * local operations or for possible route cache updates in the IPv6 740 * output path: 741 * - on connected sockets (sin6 is NULL) for route cache updates, 742 * - when we are not bound to an address and source port (it is 743 * in6_pcbsetport() which will require the write lock). 744 * 745 * We check the inp fields before actually locking the inp, so 746 * here exists a race, and we may WLOCK the inp and end with already 747 * bound one by other thread. This is fine. 748 */ 749 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 750 inp->inp_lport == 0)) 751 INP_WLOCK(inp); 752 else 753 INP_RLOCK(inp); 754 755 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 756 IPPROTO_UDP : IPPROTO_UDPLITE; 757 758 #ifdef INET 759 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 760 int hasv4addr; 761 762 if (sin6 == NULL) 763 hasv4addr = (inp->inp_vflag & INP_IPV4); 764 else 765 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 766 ? 1 : 0; 767 if (hasv4addr) { 768 /* 769 * XXXRW: We release UDP-layer locks before calling 770 * udp_send() in order to avoid recursion. However, 771 * this does mean there is a short window where inp's 772 * fields are unstable. Could this lead to a 773 * potential race in which the factors causing us to 774 * select the UDPv4 output routine are invalidated? 775 */ 776 INP_UNLOCK(inp); 777 if (sin6) 778 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 779 /* addr will just be freed in sendit(). */ 780 return (udp_send(so, flags_arg | PRUS_IPV6, m, 781 (struct sockaddr *)sin6, control, td)); 782 } 783 } else 784 #endif 785 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 786 /* 787 * Given this is either an IPv6-only socket or no INET is 788 * supported we will fail the send if the given destination 789 * address is a v4mapped address. 790 */ 791 INP_UNLOCK(inp); 792 m_freem(m); 793 m_freem(control); 794 return (EINVAL); 795 } 796 797 NET_EPOCH_ENTER(et); 798 if (control) { 799 if ((error = ip6_setpktopts(control, &opt, 800 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 801 goto release; 802 } 803 optp = &opt; 804 } else 805 optp = inp->in6p_outputopts; 806 807 if (sin6) { 808 /* 809 * Since we saw no essential reason for calling in_pcbconnect, 810 * we get rid of such kind of logic, and call in6_selectsrc 811 * and in6_pcbsetport in order to fill in the local address 812 * and the local port. 813 */ 814 if (sin6->sin6_port == 0) { 815 error = EADDRNOTAVAIL; 816 goto release; 817 } 818 819 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 820 /* how about ::ffff:0.0.0.0 case? */ 821 error = EISCONN; 822 goto release; 823 } 824 825 /* 826 * Given we handle the v4mapped case in the INET block above 827 * assert here that it must not happen anymore. 828 */ 829 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 830 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 831 "should have handled.", __func__, sin6)); 832 833 /* This only requires read-locking. */ 834 error = in6_selectsrc_socket(sin6, optp, inp, 835 td->td_ucred, scope_ambiguous, &in6a, NULL); 836 if (error) 837 goto release; 838 laddr = &in6a; 839 840 if (inp->inp_lport == 0) { 841 struct inpcbinfo *pcbinfo; 842 843 INP_WLOCK_ASSERT(inp); 844 845 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 846 INP_HASH_WLOCK(pcbinfo); 847 error = in6_pcbsetport(laddr, inp, td->td_ucred); 848 INP_HASH_WUNLOCK(pcbinfo); 849 if (error != 0) { 850 /* Undo an address bind that may have occurred. */ 851 inp->in6p_laddr = in6addr_any; 852 goto release; 853 } 854 } 855 faddr = &sin6->sin6_addr; 856 fport = sin6->sin6_port; /* allow 0 port */ 857 858 } else { 859 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 860 error = ENOTCONN; 861 goto release; 862 } 863 laddr = &inp->in6p_laddr; 864 faddr = &inp->in6p_faddr; 865 fport = inp->inp_fport; 866 } 867 868 ulen = m->m_pkthdr.len; 869 plen = sizeof(struct udphdr) + ulen; 870 hlen = sizeof(struct ip6_hdr); 871 872 /* 873 * Calculate data length and get a mbuf for UDP, IP6, and possible 874 * link-layer headers. Immediate slide the data pointer back forward 875 * since we won't use that space at this layer. 876 */ 877 M_PREPEND(m, hlen + sizeof(struct udphdr) + max_linkhdr, M_NOWAIT); 878 if (m == NULL) { 879 error = ENOBUFS; 880 goto release; 881 } 882 m->m_data += max_linkhdr; 883 m->m_len -= max_linkhdr; 884 m->m_pkthdr.len -= max_linkhdr; 885 886 /* 887 * Stuff checksum and output datagram. 888 */ 889 cscov = cscov_partial = 0; 890 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 891 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 892 udp6->uh_dport = fport; 893 if (nxt == IPPROTO_UDPLITE) { 894 struct udpcb *up; 895 896 up = intoudpcb(inp); 897 cscov = up->u_txcslen; 898 if (cscov >= plen) 899 cscov = 0; 900 udp6->uh_ulen = htons(cscov); 901 /* 902 * For UDP-Lite, checksum coverage length of zero means 903 * the entire UDPLite packet is covered by the checksum. 904 */ 905 cscov_partial = (cscov == 0) ? 0 : 1; 906 } else if (plen <= 0xffff) 907 udp6->uh_ulen = htons((u_short)plen); 908 else 909 udp6->uh_ulen = 0; 910 udp6->uh_sum = 0; 911 912 ip6 = mtod(m, struct ip6_hdr *); 913 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 914 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 915 ip6->ip6_vfc |= IPV6_VERSION; 916 ip6->ip6_plen = htons((u_short)plen); 917 ip6->ip6_nxt = nxt; 918 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 919 ip6->ip6_src = *laddr; 920 ip6->ip6_dst = *faddr; 921 922 #ifdef MAC 923 mac_inpcb_create_mbuf(inp, m); 924 #endif 925 926 if (cscov_partial) { 927 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 928 sizeof(struct ip6_hdr), plen, cscov)) == 0) 929 udp6->uh_sum = 0xffff; 930 } else { 931 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 932 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 933 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 934 } 935 936 flags = 0; 937 #if defined(ROUTE_MPATH) || defined(RSS) 938 if (CALC_FLOWID_OUTBOUND_SENDTO) { 939 uint32_t hash_type, hash_val; 940 uint8_t pr; 941 942 pr = inp->inp_socket->so_proto->pr_protocol; 943 944 hash_val = fib6_calc_packet_hash(laddr, faddr, 945 inp->inp_lport, fport, pr, &hash_type); 946 m->m_pkthdr.flowid = hash_val; 947 M_HASHTYPE_SET(m, hash_type); 948 } 949 /* do not use inp flowid */ 950 flags |= IP_NODEFAULTFLOWID; 951 #endif 952 953 UDPSTAT_INC(udps_opackets); 954 if (nxt == IPPROTO_UDPLITE) 955 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 956 else 957 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 958 error = ip6_output(m, optp, 959 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 960 inp->in6p_moptions, NULL, inp); 961 INP_UNLOCK(inp); 962 NET_EPOCH_EXIT(et); 963 964 if (control) { 965 ip6_clearpktopts(&opt, -1); 966 m_freem(control); 967 } 968 return (error); 969 970 release: 971 INP_UNLOCK(inp); 972 NET_EPOCH_EXIT(et); 973 if (control) { 974 ip6_clearpktopts(&opt, -1); 975 m_freem(control); 976 } 977 m_freem(m); 978 979 return (error); 980 } 981 982 static void 983 udp6_abort(struct socket *so) 984 { 985 struct inpcb *inp; 986 struct inpcbinfo *pcbinfo; 987 988 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 989 inp = sotoinpcb(so); 990 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 991 992 INP_WLOCK(inp); 993 #ifdef INET 994 if (inp->inp_vflag & INP_IPV4) { 995 INP_WUNLOCK(inp); 996 udp_abort(so); 997 return; 998 } 999 #endif 1000 1001 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1002 INP_HASH_WLOCK(pcbinfo); 1003 in6_pcbdisconnect(inp); 1004 INP_HASH_WUNLOCK(pcbinfo); 1005 soisdisconnected(so); 1006 } 1007 INP_WUNLOCK(inp); 1008 } 1009 1010 static int 1011 udp6_attach(struct socket *so, int proto, struct thread *td) 1012 { 1013 struct inpcbinfo *pcbinfo; 1014 struct inpcb *inp; 1015 struct udpcb *up; 1016 int error; 1017 1018 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1019 inp = sotoinpcb(so); 1020 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 1021 1022 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1023 error = soreserve(so, udp_sendspace, udp_recvspace); 1024 if (error) 1025 return (error); 1026 } 1027 error = in_pcballoc(so, pcbinfo); 1028 if (error) 1029 return (error); 1030 inp = (struct inpcb *)so->so_pcb; 1031 inp->in6p_cksum = -1; /* just to be sure */ 1032 /* 1033 * XXX: ugly!! 1034 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1035 * because the socket may be bound to an IPv6 wildcard address, 1036 * which may match an IPv4-mapped IPv6 address. 1037 */ 1038 inp->inp_ip_ttl = V_ip_defttl; 1039 up = intoudpcb(inp); 1040 bzero(&up->u_start_zero, u_zero_size); 1041 INP_WUNLOCK(inp); 1042 return (0); 1043 } 1044 1045 static int 1046 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1047 { 1048 struct sockaddr_in6 *sin6_p; 1049 struct inpcb *inp; 1050 struct inpcbinfo *pcbinfo; 1051 int error; 1052 u_char vflagsav; 1053 1054 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1055 inp = sotoinpcb(so); 1056 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1057 1058 if (nam->sa_family != AF_INET6) 1059 return (EAFNOSUPPORT); 1060 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1061 return (EINVAL); 1062 1063 sin6_p = (struct sockaddr_in6 *)nam; 1064 1065 INP_WLOCK(inp); 1066 INP_HASH_WLOCK(pcbinfo); 1067 vflagsav = inp->inp_vflag; 1068 inp->inp_vflag &= ~INP_IPV4; 1069 inp->inp_vflag |= INP_IPV6; 1070 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1071 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1072 inp->inp_vflag |= INP_IPV4; 1073 #ifdef INET 1074 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1075 struct sockaddr_in sin; 1076 1077 in6_sin6_2_sin(&sin, sin6_p); 1078 inp->inp_vflag |= INP_IPV4; 1079 inp->inp_vflag &= ~INP_IPV6; 1080 error = in_pcbbind(inp, &sin, 1081 V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1082 td->td_ucred); 1083 goto out; 1084 } 1085 #endif 1086 } 1087 1088 error = in6_pcbbind(inp, sin6_p, V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1089 td->td_ucred); 1090 #ifdef INET 1091 out: 1092 #endif 1093 if (error != 0) 1094 inp->inp_vflag = vflagsav; 1095 INP_HASH_WUNLOCK(pcbinfo); 1096 INP_WUNLOCK(inp); 1097 return (error); 1098 } 1099 1100 static void 1101 udp6_close(struct socket *so) 1102 { 1103 struct inpcb *inp; 1104 struct inpcbinfo *pcbinfo; 1105 1106 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1107 inp = sotoinpcb(so); 1108 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1109 1110 INP_WLOCK(inp); 1111 #ifdef INET 1112 if (inp->inp_vflag & INP_IPV4) { 1113 INP_WUNLOCK(inp); 1114 (void)udp_disconnect(so); 1115 return; 1116 } 1117 #endif 1118 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1119 INP_HASH_WLOCK(pcbinfo); 1120 in6_pcbdisconnect(inp); 1121 INP_HASH_WUNLOCK(pcbinfo); 1122 soisdisconnected(so); 1123 } 1124 INP_WUNLOCK(inp); 1125 } 1126 1127 static int 1128 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1129 { 1130 struct epoch_tracker et; 1131 struct inpcb *inp; 1132 struct inpcbinfo *pcbinfo; 1133 struct sockaddr_in6 *sin6; 1134 int error; 1135 u_char vflagsav; 1136 1137 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1138 inp = sotoinpcb(so); 1139 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1140 1141 sin6 = (struct sockaddr_in6 *)nam; 1142 if (sin6->sin6_family != AF_INET6) 1143 return (EAFNOSUPPORT); 1144 if (sin6->sin6_len != sizeof(*sin6)) 1145 return (EINVAL); 1146 1147 /* 1148 * XXXRW: Need to clarify locking of v4/v6 flags. 1149 */ 1150 INP_WLOCK(inp); 1151 #ifdef INET 1152 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1153 struct sockaddr_in sin; 1154 1155 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1156 error = EINVAL; 1157 goto out; 1158 } 1159 if ((inp->inp_vflag & INP_IPV4) == 0) { 1160 error = EAFNOSUPPORT; 1161 goto out; 1162 } 1163 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1164 error = EISCONN; 1165 goto out; 1166 } 1167 in6_sin6_2_sin(&sin, sin6); 1168 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1169 if (error != 0) 1170 goto out; 1171 vflagsav = inp->inp_vflag; 1172 inp->inp_vflag |= INP_IPV4; 1173 inp->inp_vflag &= ~INP_IPV6; 1174 NET_EPOCH_ENTER(et); 1175 INP_HASH_WLOCK(pcbinfo); 1176 error = in_pcbconnect(inp, &sin, td->td_ucred); 1177 INP_HASH_WUNLOCK(pcbinfo); 1178 NET_EPOCH_EXIT(et); 1179 /* 1180 * If connect succeeds, mark socket as connected. If 1181 * connect fails and socket is unbound, reset inp_vflag 1182 * field. 1183 */ 1184 if (error == 0) 1185 soisconnected(so); 1186 else if (inp->inp_laddr.s_addr == INADDR_ANY && 1187 inp->inp_lport == 0) 1188 inp->inp_vflag = vflagsav; 1189 goto out; 1190 } else { 1191 if ((inp->inp_vflag & INP_IPV6) == 0) { 1192 error = EAFNOSUPPORT; 1193 goto out; 1194 } 1195 } 1196 #endif 1197 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1198 error = EISCONN; 1199 goto out; 1200 } 1201 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1202 if (error != 0) 1203 goto out; 1204 vflagsav = inp->inp_vflag; 1205 inp->inp_vflag &= ~INP_IPV4; 1206 inp->inp_vflag |= INP_IPV6; 1207 NET_EPOCH_ENTER(et); 1208 INP_HASH_WLOCK(pcbinfo); 1209 error = in6_pcbconnect(inp, sin6, td->td_ucred, true); 1210 INP_HASH_WUNLOCK(pcbinfo); 1211 NET_EPOCH_EXIT(et); 1212 /* 1213 * If connect succeeds, mark socket as connected. If 1214 * connect fails and socket is unbound, reset inp_vflag 1215 * field. 1216 */ 1217 if (error == 0) 1218 soisconnected(so); 1219 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1220 inp->inp_lport == 0) 1221 inp->inp_vflag = vflagsav; 1222 out: 1223 INP_WUNLOCK(inp); 1224 return (error); 1225 } 1226 1227 static void 1228 udp6_detach(struct socket *so) 1229 { 1230 struct inpcb *inp; 1231 1232 inp = sotoinpcb(so); 1233 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1234 1235 INP_WLOCK(inp); 1236 in_pcbfree(inp); 1237 } 1238 1239 static int 1240 udp6_disconnect(struct socket *so) 1241 { 1242 struct inpcb *inp; 1243 struct inpcbinfo *pcbinfo; 1244 1245 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1246 inp = sotoinpcb(so); 1247 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1248 1249 INP_WLOCK(inp); 1250 #ifdef INET 1251 if (inp->inp_vflag & INP_IPV4) { 1252 INP_WUNLOCK(inp); 1253 (void)udp_disconnect(so); 1254 return (0); 1255 } 1256 #endif 1257 1258 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1259 INP_WUNLOCK(inp); 1260 return (ENOTCONN); 1261 } 1262 1263 INP_HASH_WLOCK(pcbinfo); 1264 in6_pcbdisconnect(inp); 1265 INP_HASH_WUNLOCK(pcbinfo); 1266 SOCK_LOCK(so); 1267 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1268 SOCK_UNLOCK(so); 1269 INP_WUNLOCK(inp); 1270 return (0); 1271 } 1272 1273 #define UDP6_PROTOSW \ 1274 .pr_type = SOCK_DGRAM, \ 1275 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1276 .pr_ctloutput = udp_ctloutput, \ 1277 .pr_abort = udp6_abort, \ 1278 .pr_attach = udp6_attach, \ 1279 .pr_bind = udp6_bind, \ 1280 .pr_connect = udp6_connect, \ 1281 .pr_control = in6_control, \ 1282 .pr_detach = udp6_detach, \ 1283 .pr_disconnect = udp6_disconnect, \ 1284 .pr_peeraddr = in6_mapped_peeraddr, \ 1285 .pr_send = udp6_send, \ 1286 .pr_shutdown = udp_shutdown, \ 1287 .pr_sockaddr = in6_mapped_sockaddr, \ 1288 .pr_soreceive = soreceive_dgram, \ 1289 .pr_sosend = sosend_dgram, \ 1290 .pr_sosetlabel = in_pcbsosetlabel, \ 1291 .pr_close = udp6_close 1292 1293 struct protosw udp6_protosw = { 1294 .pr_protocol = IPPROTO_UDP, 1295 UDP6_PROTOSW 1296 }; 1297 1298 struct protosw udplite6_protosw = { 1299 .pr_protocol = IPPROTO_UDPLITE, 1300 UDP6_PROTOSW 1301 }; 1302 1303 static void 1304 udp6_init(void *arg __unused) 1305 { 1306 1307 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1308 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1309 } 1310 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1311