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 scope_ambiguous = 0; 707 if (sin6) { 708 /* Protect *addr6 from overwrites. */ 709 tmp = *sin6; 710 sin6 = &tmp; 711 712 /* 713 * Application should provide a proper zone ID or the use of 714 * default zone IDs should be enabled. Unfortunately, some 715 * applications do not behave as it should, so we need a 716 * workaround. Even if an appropriate ID is not determined, 717 * we'll see if we can determine the outgoing interface. If we 718 * can, determine the zone ID based on the interface below. 719 */ 720 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 721 scope_ambiguous = 1; 722 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { 723 if (control) 724 m_freem(control); 725 m_freem(m); 726 return (error); 727 } 728 } 729 730 inp = sotoinpcb(so); 731 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 732 /* 733 * In the following cases we want a write lock on the inp for either 734 * local operations or for possible route cache updates in the IPv6 735 * output path: 736 * - on connected sockets (sin6 is NULL) for route cache updates, 737 * - when we are not bound to an address and source port (it is 738 * in6_pcbsetport() which will require the write lock). 739 * 740 * We check the inp fields before actually locking the inp, so 741 * here exists a race, and we may WLOCK the inp and end with already 742 * bound one by other thread. This is fine. 743 */ 744 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 745 inp->inp_lport == 0)) 746 INP_WLOCK(inp); 747 else 748 INP_RLOCK(inp); 749 750 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 751 IPPROTO_UDP : IPPROTO_UDPLITE; 752 753 #ifdef INET 754 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 755 int hasv4addr; 756 757 if (sin6 == NULL) 758 hasv4addr = (inp->inp_vflag & INP_IPV4); 759 else 760 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 761 ? 1 : 0; 762 if (hasv4addr) { 763 /* 764 * XXXRW: We release UDP-layer locks before calling 765 * udp_send() in order to avoid recursion. However, 766 * this does mean there is a short window where inp's 767 * fields are unstable. Could this lead to a 768 * potential race in which the factors causing us to 769 * select the UDPv4 output routine are invalidated? 770 */ 771 INP_UNLOCK(inp); 772 if (sin6) 773 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); 774 /* addr will just be freed in sendit(). */ 775 return (udp_send(so, flags_arg | PRUS_IPV6, m, 776 (struct sockaddr *)sin6, control, td)); 777 } 778 } else 779 #endif 780 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 781 /* 782 * Given this is either an IPv6-only socket or no INET is 783 * supported we will fail the send if the given destination 784 * address is a v4mapped address. 785 */ 786 INP_UNLOCK(inp); 787 m_freem(m); 788 m_freem(control); 789 return (EINVAL); 790 } 791 792 NET_EPOCH_ENTER(et); 793 if (control) { 794 if ((error = ip6_setpktopts(control, &opt, 795 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { 796 goto release; 797 } 798 optp = &opt; 799 } else 800 optp = inp->in6p_outputopts; 801 802 if (sin6) { 803 /* 804 * Since we saw no essential reason for calling in_pcbconnect, 805 * we get rid of such kind of logic, and call in6_selectsrc 806 * and in6_pcbsetport in order to fill in the local address 807 * and the local port. 808 */ 809 if (sin6->sin6_port == 0) { 810 error = EADDRNOTAVAIL; 811 goto release; 812 } 813 814 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 815 /* how about ::ffff:0.0.0.0 case? */ 816 error = EISCONN; 817 goto release; 818 } 819 820 /* 821 * Given we handle the v4mapped case in the INET block above 822 * assert here that it must not happen anymore. 823 */ 824 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), 825 ("%s: sin6(%p)->sin6_addr is v4mapped which we " 826 "should have handled.", __func__, sin6)); 827 828 /* This only requires read-locking. */ 829 error = in6_selectsrc_socket(sin6, optp, inp, 830 td->td_ucred, scope_ambiguous, &in6a, NULL); 831 if (error) 832 goto release; 833 laddr = &in6a; 834 835 if (inp->inp_lport == 0) { 836 struct inpcbinfo *pcbinfo; 837 838 INP_WLOCK_ASSERT(inp); 839 840 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 841 INP_HASH_WLOCK(pcbinfo); 842 error = in6_pcbsetport(laddr, inp, td->td_ucred); 843 INP_HASH_WUNLOCK(pcbinfo); 844 if (error != 0) { 845 /* Undo an address bind that may have occurred. */ 846 inp->in6p_laddr = in6addr_any; 847 goto release; 848 } 849 } 850 faddr = &sin6->sin6_addr; 851 fport = sin6->sin6_port; /* allow 0 port */ 852 853 } else { 854 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 855 error = ENOTCONN; 856 goto release; 857 } 858 laddr = &inp->in6p_laddr; 859 faddr = &inp->in6p_faddr; 860 fport = inp->inp_fport; 861 } 862 863 864 /* 865 * We do not support IPv6 Jumbograms (RFC2675), so validate the payload 866 * length fits in a normal gram. 867 */ 868 ulen = m->m_pkthdr.len; 869 plen = sizeof(struct udphdr) + ulen; 870 hlen = sizeof(struct ip6_hdr); 871 872 if (plen > IPV6_MAXPAYLOAD) { 873 m_freem(control); 874 m_freem(m); 875 return (EMSGSIZE); 876 } 877 878 /* 879 * Calculate data length and get a mbuf for UDP, IP6, and possible 880 * link-layer headers. Immediate slide the data pointer back forward 881 * since we won't use that space at this layer. 882 */ 883 M_PREPEND(m, hlen + sizeof(struct udphdr) + max_linkhdr, M_NOWAIT); 884 if (m == NULL) { 885 error = ENOBUFS; 886 goto release; 887 } 888 m->m_data += max_linkhdr; 889 m->m_len -= max_linkhdr; 890 m->m_pkthdr.len -= max_linkhdr; 891 892 /* 893 * Stuff checksum and output datagram. 894 */ 895 cscov = cscov_partial = 0; 896 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 897 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 898 udp6->uh_dport = fport; 899 if (nxt == IPPROTO_UDPLITE) { 900 struct udpcb *up; 901 902 up = intoudpcb(inp); 903 cscov = up->u_txcslen; 904 if (cscov >= plen) 905 cscov = 0; 906 udp6->uh_ulen = htons(cscov); 907 /* 908 * For UDP-Lite, checksum coverage length of zero means 909 * the entire UDPLite packet is covered by the checksum. 910 */ 911 cscov_partial = (cscov == 0) ? 0 : 1; 912 } else { 913 MPASS(plen <= IPV6_MAXPAYLOAD); 914 udp6->uh_ulen = htons((u_short)plen); 915 } 916 udp6->uh_sum = 0; 917 918 ip6 = mtod(m, struct ip6_hdr *); 919 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 920 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 921 ip6->ip6_vfc |= IPV6_VERSION; 922 ip6->ip6_plen = htons((u_short)plen); 923 ip6->ip6_nxt = nxt; 924 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 925 ip6->ip6_src = *laddr; 926 ip6->ip6_dst = *faddr; 927 928 #ifdef MAC 929 mac_inpcb_create_mbuf(inp, m); 930 #endif 931 932 if (cscov_partial) { 933 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 934 sizeof(struct ip6_hdr), plen, cscov)) == 0) 935 udp6->uh_sum = 0xffff; 936 } else { 937 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 938 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 939 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 940 } 941 942 flags = 0; 943 #if defined(ROUTE_MPATH) || defined(RSS) 944 if (CALC_FLOWID_OUTBOUND_SENDTO) { 945 uint32_t hash_type, hash_val; 946 uint8_t pr; 947 948 pr = inp->inp_socket->so_proto->pr_protocol; 949 950 hash_val = fib6_calc_packet_hash(laddr, faddr, 951 inp->inp_lport, fport, pr, &hash_type); 952 m->m_pkthdr.flowid = hash_val; 953 M_HASHTYPE_SET(m, hash_type); 954 } 955 /* do not use inp flowid */ 956 flags |= IP_NODEFAULTFLOWID; 957 #endif 958 959 UDPSTAT_INC(udps_opackets); 960 if (nxt == IPPROTO_UDPLITE) 961 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); 962 else 963 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 964 error = ip6_output(m, optp, 965 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, 966 inp->in6p_moptions, NULL, inp); 967 INP_UNLOCK(inp); 968 NET_EPOCH_EXIT(et); 969 970 if (control) { 971 ip6_clearpktopts(&opt, -1); 972 m_freem(control); 973 } 974 return (error); 975 976 release: 977 INP_UNLOCK(inp); 978 NET_EPOCH_EXIT(et); 979 if (control) { 980 ip6_clearpktopts(&opt, -1); 981 m_freem(control); 982 } 983 m_freem(m); 984 985 return (error); 986 } 987 988 static void 989 udp6_abort(struct socket *so) 990 { 991 struct inpcb *inp; 992 struct inpcbinfo *pcbinfo; 993 994 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 995 inp = sotoinpcb(so); 996 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 997 998 INP_WLOCK(inp); 999 #ifdef INET 1000 if (inp->inp_vflag & INP_IPV4) { 1001 INP_WUNLOCK(inp); 1002 udp_abort(so); 1003 return; 1004 } 1005 #endif 1006 1007 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1008 INP_HASH_WLOCK(pcbinfo); 1009 in6_pcbdisconnect(inp); 1010 INP_HASH_WUNLOCK(pcbinfo); 1011 soisdisconnected(so); 1012 } 1013 INP_WUNLOCK(inp); 1014 } 1015 1016 static int 1017 udp6_attach(struct socket *so, int proto, struct thread *td) 1018 { 1019 struct inpcbinfo *pcbinfo; 1020 struct inpcb *inp; 1021 struct udpcb *up; 1022 int error; 1023 1024 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1025 inp = sotoinpcb(so); 1026 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 1027 1028 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1029 error = soreserve(so, udp_sendspace, udp_recvspace); 1030 if (error) 1031 return (error); 1032 } 1033 error = in_pcballoc(so, pcbinfo); 1034 if (error) 1035 return (error); 1036 inp = (struct inpcb *)so->so_pcb; 1037 inp->in6p_cksum = -1; /* just to be sure */ 1038 /* 1039 * XXX: ugly!! 1040 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 1041 * because the socket may be bound to an IPv6 wildcard address, 1042 * which may match an IPv4-mapped IPv6 address. 1043 */ 1044 inp->inp_ip_ttl = V_ip_defttl; 1045 up = intoudpcb(inp); 1046 bzero(&up->u_start_zero, u_zero_size); 1047 INP_WUNLOCK(inp); 1048 return (0); 1049 } 1050 1051 static int 1052 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 1053 { 1054 struct sockaddr_in6 *sin6_p; 1055 struct inpcb *inp; 1056 struct inpcbinfo *pcbinfo; 1057 int error; 1058 u_char vflagsav; 1059 1060 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1061 inp = sotoinpcb(so); 1062 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 1063 1064 if (nam->sa_family != AF_INET6) 1065 return (EAFNOSUPPORT); 1066 if (nam->sa_len != sizeof(struct sockaddr_in6)) 1067 return (EINVAL); 1068 1069 sin6_p = (struct sockaddr_in6 *)nam; 1070 1071 INP_WLOCK(inp); 1072 INP_HASH_WLOCK(pcbinfo); 1073 vflagsav = inp->inp_vflag; 1074 inp->inp_vflag &= ~INP_IPV4; 1075 inp->inp_vflag |= INP_IPV6; 1076 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1077 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1078 inp->inp_vflag |= INP_IPV4; 1079 #ifdef INET 1080 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1081 struct sockaddr_in sin; 1082 1083 in6_sin6_2_sin(&sin, sin6_p); 1084 inp->inp_vflag |= INP_IPV4; 1085 inp->inp_vflag &= ~INP_IPV6; 1086 error = in_pcbbind(inp, &sin, 1087 V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1088 td->td_ucred); 1089 goto out; 1090 } 1091 #endif 1092 } 1093 1094 error = in6_pcbbind(inp, sin6_p, V_udp_bind_all_fibs ? 0 : INPBIND_FIB, 1095 td->td_ucred); 1096 #ifdef INET 1097 out: 1098 #endif 1099 if (error != 0) 1100 inp->inp_vflag = vflagsav; 1101 INP_HASH_WUNLOCK(pcbinfo); 1102 INP_WUNLOCK(inp); 1103 return (error); 1104 } 1105 1106 static void 1107 udp6_close(struct socket *so) 1108 { 1109 struct inpcb *inp; 1110 struct inpcbinfo *pcbinfo; 1111 1112 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1113 inp = sotoinpcb(so); 1114 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1115 1116 INP_WLOCK(inp); 1117 #ifdef INET 1118 if (inp->inp_vflag & INP_IPV4) { 1119 INP_WUNLOCK(inp); 1120 (void)udp_disconnect(so); 1121 return; 1122 } 1123 #endif 1124 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1125 INP_HASH_WLOCK(pcbinfo); 1126 in6_pcbdisconnect(inp); 1127 INP_HASH_WUNLOCK(pcbinfo); 1128 soisdisconnected(so); 1129 } 1130 INP_WUNLOCK(inp); 1131 } 1132 1133 static int 1134 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1135 { 1136 struct epoch_tracker et; 1137 struct inpcb *inp; 1138 struct inpcbinfo *pcbinfo; 1139 struct sockaddr_in6 *sin6; 1140 int error; 1141 u_char vflagsav; 1142 1143 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1144 inp = sotoinpcb(so); 1145 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1146 1147 sin6 = (struct sockaddr_in6 *)nam; 1148 if (sin6->sin6_family != AF_INET6) 1149 return (EAFNOSUPPORT); 1150 if (sin6->sin6_len != sizeof(*sin6)) 1151 return (EINVAL); 1152 1153 /* 1154 * XXXRW: Need to clarify locking of v4/v6 flags. 1155 */ 1156 INP_WLOCK(inp); 1157 #ifdef INET 1158 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1159 struct sockaddr_in sin; 1160 1161 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1162 error = EINVAL; 1163 goto out; 1164 } 1165 if ((inp->inp_vflag & INP_IPV4) == 0) { 1166 error = EAFNOSUPPORT; 1167 goto out; 1168 } 1169 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1170 error = EISCONN; 1171 goto out; 1172 } 1173 in6_sin6_2_sin(&sin, sin6); 1174 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1175 if (error != 0) 1176 goto out; 1177 vflagsav = inp->inp_vflag; 1178 inp->inp_vflag |= INP_IPV4; 1179 inp->inp_vflag &= ~INP_IPV6; 1180 NET_EPOCH_ENTER(et); 1181 INP_HASH_WLOCK(pcbinfo); 1182 error = in_pcbconnect(inp, &sin, td->td_ucred); 1183 INP_HASH_WUNLOCK(pcbinfo); 1184 NET_EPOCH_EXIT(et); 1185 /* 1186 * If connect succeeds, mark socket as connected. If 1187 * connect fails and socket is unbound, reset inp_vflag 1188 * field. 1189 */ 1190 if (error == 0) 1191 soisconnected(so); 1192 else if (inp->inp_laddr.s_addr == INADDR_ANY && 1193 inp->inp_lport == 0) 1194 inp->inp_vflag = vflagsav; 1195 goto out; 1196 } else { 1197 if ((inp->inp_vflag & INP_IPV6) == 0) { 1198 error = EAFNOSUPPORT; 1199 goto out; 1200 } 1201 } 1202 #endif 1203 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1204 error = EISCONN; 1205 goto out; 1206 } 1207 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1208 if (error != 0) 1209 goto out; 1210 vflagsav = inp->inp_vflag; 1211 inp->inp_vflag &= ~INP_IPV4; 1212 inp->inp_vflag |= INP_IPV6; 1213 NET_EPOCH_ENTER(et); 1214 INP_HASH_WLOCK(pcbinfo); 1215 error = in6_pcbconnect(inp, sin6, td->td_ucred, true); 1216 INP_HASH_WUNLOCK(pcbinfo); 1217 NET_EPOCH_EXIT(et); 1218 /* 1219 * If connect succeeds, mark socket as connected. If 1220 * connect fails and socket is unbound, reset inp_vflag 1221 * field. 1222 */ 1223 if (error == 0) 1224 soisconnected(so); 1225 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 1226 inp->inp_lport == 0) 1227 inp->inp_vflag = vflagsav; 1228 out: 1229 INP_WUNLOCK(inp); 1230 return (error); 1231 } 1232 1233 static void 1234 udp6_detach(struct socket *so) 1235 { 1236 struct inpcb *inp; 1237 1238 inp = sotoinpcb(so); 1239 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1240 1241 INP_WLOCK(inp); 1242 in_pcbfree(inp); 1243 } 1244 1245 static int 1246 udp6_disconnect(struct socket *so) 1247 { 1248 struct inpcb *inp; 1249 struct inpcbinfo *pcbinfo; 1250 1251 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1252 inp = sotoinpcb(so); 1253 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1254 1255 INP_WLOCK(inp); 1256 #ifdef INET 1257 if (inp->inp_vflag & INP_IPV4) { 1258 INP_WUNLOCK(inp); 1259 (void)udp_disconnect(so); 1260 return (0); 1261 } 1262 #endif 1263 1264 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1265 INP_WUNLOCK(inp); 1266 return (ENOTCONN); 1267 } 1268 1269 INP_HASH_WLOCK(pcbinfo); 1270 in6_pcbdisconnect(inp); 1271 INP_HASH_WUNLOCK(pcbinfo); 1272 SOCK_LOCK(so); 1273 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1274 SOCK_UNLOCK(so); 1275 INP_WUNLOCK(inp); 1276 return (0); 1277 } 1278 1279 #define UDP6_PROTOSW \ 1280 .pr_type = SOCK_DGRAM, \ 1281 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ 1282 .pr_ctloutput = udp_ctloutput, \ 1283 .pr_abort = udp6_abort, \ 1284 .pr_attach = udp6_attach, \ 1285 .pr_bind = udp6_bind, \ 1286 .pr_connect = udp6_connect, \ 1287 .pr_control = in6_control, \ 1288 .pr_detach = udp6_detach, \ 1289 .pr_disconnect = udp6_disconnect, \ 1290 .pr_peeraddr = in6_mapped_peeraddr, \ 1291 .pr_send = udp6_send, \ 1292 .pr_shutdown = udp_shutdown, \ 1293 .pr_sockaddr = in6_mapped_sockaddr, \ 1294 .pr_soreceive = soreceive_dgram, \ 1295 .pr_sosend = sosend_dgram, \ 1296 .pr_sosetlabel = in_pcbsosetlabel, \ 1297 .pr_close = udp6_close 1298 1299 struct protosw udp6_protosw = { 1300 .pr_protocol = IPPROTO_UDP, 1301 UDP6_PROTOSW 1302 }; 1303 1304 struct protosw udplite6_protosw = { 1305 .pr_protocol = IPPROTO_UDPLITE, 1306 UDP6_PROTOSW 1307 }; 1308 1309 static void 1310 udp6_init(void *arg __unused) 1311 { 1312 1313 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); 1314 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); 1315 } 1316 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL); 1317