1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * Copyright (c) 2010-2011 Juniper Networks, Inc. 4 * Copyright (c) 2014 Kevin Lo 5 * All rights reserved. 6 * 7 * Portions of this software were developed by Robert N. M. Watson under 8 * contract to Juniper Networks, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the project nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ 35 * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $ 36 */ 37 38 /*- 39 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 40 * The Regents of the University of California. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 68 */ 69 70 #include <sys/cdefs.h> 71 __FBSDID("$FreeBSD$"); 72 73 #include "opt_inet.h" 74 #include "opt_inet6.h" 75 #include "opt_ipfw.h" 76 #include "opt_ipsec.h" 77 #include "opt_rss.h" 78 79 #include <sys/param.h> 80 #include <sys/jail.h> 81 #include <sys/kernel.h> 82 #include <sys/lock.h> 83 #include <sys/mbuf.h> 84 #include <sys/priv.h> 85 #include <sys/proc.h> 86 #include <sys/protosw.h> 87 #include <sys/sdt.h> 88 #include <sys/signalvar.h> 89 #include <sys/socket.h> 90 #include <sys/socketvar.h> 91 #include <sys/sx.h> 92 #include <sys/sysctl.h> 93 #include <sys/syslog.h> 94 #include <sys/systm.h> 95 96 #include <net/if.h> 97 #include <net/if_var.h> 98 #include <net/if_types.h> 99 #include <net/route.h> 100 #include <net/rss_config.h> 101 102 #include <netinet/in.h> 103 #include <netinet/in_kdtrace.h> 104 #include <netinet/in_pcb.h> 105 #include <netinet/in_systm.h> 106 #include <netinet/in_var.h> 107 #include <netinet/ip.h> 108 #include <netinet/ip_icmp.h> 109 #include <netinet/ip6.h> 110 #include <netinet/icmp_var.h> 111 #include <netinet/icmp6.h> 112 #include <netinet/ip_var.h> 113 #include <netinet/udp.h> 114 #include <netinet/udp_var.h> 115 #include <netinet/udplite.h> 116 117 #include <netinet6/ip6protosw.h> 118 #include <netinet6/ip6_var.h> 119 #include <netinet6/in6_pcb.h> 120 #include <netinet6/in6_rss.h> 121 #include <netinet6/udp6_var.h> 122 #include <netinet6/scope6_var.h> 123 124 #ifdef IPSEC 125 #include <netipsec/ipsec.h> 126 #include <netipsec/ipsec6.h> 127 #endif /* IPSEC */ 128 129 #include <security/mac/mac_framework.h> 130 131 /* 132 * UDP protocol implementation. 133 * Per RFC 768, August, 1980. 134 */ 135 136 extern struct protosw inetsw[]; 137 static void udp6_detach(struct socket *so); 138 139 static int 140 udp6_append(struct inpcb *inp, struct mbuf *n, int off, 141 struct sockaddr_in6 *fromsa) 142 { 143 struct socket *so; 144 struct mbuf *opts; 145 struct udpcb *up; 146 147 INP_LOCK_ASSERT(inp); 148 149 /* 150 * Engage the tunneling protocol. 151 */ 152 up = intoudpcb(inp); 153 if (up->u_tun_func != NULL) { 154 in_pcbref(inp); 155 INP_RUNLOCK(inp); 156 (*up->u_tun_func)(n, off, inp, (struct sockaddr *)fromsa, 157 up->u_tun_ctx); 158 INP_RLOCK(inp); 159 return (in_pcbrele_rlocked(inp)); 160 } 161 #ifdef IPSEC 162 /* Check AH/ESP integrity. */ 163 if (ipsec6_in_reject(n, inp)) { 164 m_freem(n); 165 return (0); 166 } 167 #endif /* IPSEC */ 168 #ifdef MAC 169 if (mac_inpcb_check_deliver(inp, n) != 0) { 170 m_freem(n); 171 return (0); 172 } 173 #endif 174 opts = NULL; 175 if (inp->inp_flags & INP_CONTROLOPTS || 176 inp->inp_socket->so_options & SO_TIMESTAMP) 177 ip6_savecontrol(inp, n, &opts); 178 m_adj(n, off + sizeof(struct udphdr)); 179 180 so = inp->inp_socket; 181 SOCKBUF_LOCK(&so->so_rcv); 182 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n, 183 opts) == 0) { 184 SOCKBUF_UNLOCK(&so->so_rcv); 185 m_freem(n); 186 if (opts) 187 m_freem(opts); 188 UDPSTAT_INC(udps_fullsock); 189 } else 190 sorwakeup_locked(so); 191 return (0); 192 } 193 194 int 195 udp6_input(struct mbuf **mp, int *offp, int proto) 196 { 197 struct mbuf *m = *mp; 198 struct ifnet *ifp; 199 struct ip6_hdr *ip6; 200 struct udphdr *uh; 201 struct inpcb *inp; 202 struct inpcbinfo *pcbinfo; 203 struct udpcb *up; 204 int off = *offp; 205 int cscov_partial; 206 int plen, ulen; 207 struct sockaddr_in6 fromsa; 208 struct m_tag *fwd_tag; 209 uint16_t uh_sum; 210 uint8_t nxt; 211 212 ifp = m->m_pkthdr.rcvif; 213 ip6 = mtod(m, struct ip6_hdr *); 214 215 #ifndef PULLDOWN_TEST 216 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 217 ip6 = mtod(m, struct ip6_hdr *); 218 uh = (struct udphdr *)((caddr_t)ip6 + off); 219 #else 220 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh)); 221 if (!uh) 222 return (IPPROTO_DONE); 223 #endif 224 225 UDPSTAT_INC(udps_ipackets); 226 227 /* 228 * Destination port of 0 is illegal, based on RFC768. 229 */ 230 if (uh->uh_dport == 0) 231 goto badunlocked; 232 233 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 234 ulen = ntohs((u_short)uh->uh_ulen); 235 236 nxt = proto; 237 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 238 if (nxt == IPPROTO_UDPLITE) { 239 /* Zero means checksum over the complete packet. */ 240 if (ulen == 0) 241 ulen = plen; 242 if (ulen == plen) 243 cscov_partial = 0; 244 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 245 /* XXX: What is the right UDPLite MIB counter? */ 246 goto badunlocked; 247 } 248 if (uh->uh_sum == 0) { 249 /* XXX: What is the right UDPLite MIB counter? */ 250 goto badunlocked; 251 } 252 } else { 253 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 254 UDPSTAT_INC(udps_badlen); 255 goto badunlocked; 256 } 257 if (uh->uh_sum == 0) { 258 UDPSTAT_INC(udps_nosum); 259 goto badunlocked; 260 } 261 } 262 263 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 264 !cscov_partial) { 265 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 266 uh_sum = m->m_pkthdr.csum_data; 267 else 268 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 269 m->m_pkthdr.csum_data); 270 uh_sum ^= 0xffff; 271 } else 272 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 273 274 if (uh_sum != 0) { 275 UDPSTAT_INC(udps_badsum); 276 goto badunlocked; 277 } 278 279 /* 280 * Construct sockaddr format source address. 281 */ 282 init_sin6(&fromsa, m); 283 fromsa.sin6_port = uh->uh_sport; 284 285 pcbinfo = udp_get_inpcbinfo(nxt); 286 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 287 struct inpcb *last; 288 struct inpcbhead *pcblist; 289 struct ip6_moptions *imo; 290 291 INP_INFO_RLOCK(pcbinfo); 292 /* 293 * In the event that laddr should be set to the link-local 294 * address (this happens in RIPng), the multicast address 295 * specified in the received packet will not match laddr. To 296 * handle this situation, matching is relaxed if the 297 * receiving interface is the same as one specified in the 298 * socket and if the destination multicast address matches 299 * one of the multicast groups specified in the socket. 300 */ 301 302 /* 303 * KAME note: traditionally we dropped udpiphdr from mbuf 304 * here. We need udphdr for IPsec processing so we do that 305 * later. 306 */ 307 pcblist = udp_get_pcblist(nxt); 308 last = NULL; 309 LIST_FOREACH(inp, pcblist, inp_list) { 310 if ((inp->inp_vflag & INP_IPV6) == 0) 311 continue; 312 if (inp->inp_lport != uh->uh_dport) 313 continue; 314 if (inp->inp_fport != 0 && 315 inp->inp_fport != uh->uh_sport) 316 continue; 317 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 318 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 319 &ip6->ip6_dst)) 320 continue; 321 } 322 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 323 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 324 &ip6->ip6_src) || 325 inp->inp_fport != uh->uh_sport) 326 continue; 327 } 328 329 /* 330 * XXXRW: Because we weren't holding either the inpcb 331 * or the hash lock when we checked for a match 332 * before, we should probably recheck now that the 333 * inpcb lock is (supposed to be) held. 334 */ 335 336 /* 337 * Handle socket delivery policy for any-source 338 * and source-specific multicast. [RFC3678] 339 */ 340 imo = inp->in6p_moptions; 341 if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 342 struct sockaddr_in6 mcaddr; 343 int blocked; 344 345 INP_RLOCK(inp); 346 347 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 348 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 349 mcaddr.sin6_family = AF_INET6; 350 mcaddr.sin6_addr = ip6->ip6_dst; 351 352 blocked = im6o_mc_filter(imo, ifp, 353 (struct sockaddr *)&mcaddr, 354 (struct sockaddr *)&fromsa); 355 if (blocked != MCAST_PASS) { 356 if (blocked == MCAST_NOTGMEMBER) 357 IP6STAT_INC(ip6s_notmember); 358 if (blocked == MCAST_NOTSMEMBER || 359 blocked == MCAST_MUTED) 360 UDPSTAT_INC(udps_filtermcast); 361 INP_RUNLOCK(inp); /* XXX */ 362 continue; 363 } 364 365 INP_RUNLOCK(inp); 366 } 367 if (last != NULL) { 368 struct mbuf *n; 369 370 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 371 INP_RLOCK(last); 372 UDP_PROBE(receive, NULL, last, ip6, 373 last, uh); 374 if (udp6_append(last, n, off, &fromsa)) 375 goto inp_lost; 376 INP_RUNLOCK(last); 377 } 378 } 379 last = inp; 380 /* 381 * Don't look for additional matches if this one does 382 * not have either the SO_REUSEPORT or SO_REUSEADDR 383 * socket options set. This heuristic avoids 384 * searching through all pcbs in the common case of a 385 * non-shared port. It assumes that an application 386 * will never clear these options after setting them. 387 */ 388 if ((last->inp_socket->so_options & 389 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 390 break; 391 } 392 393 if (last == NULL) { 394 /* 395 * No matching pcb found; discard datagram. (No need 396 * to send an ICMP Port Unreachable for a broadcast 397 * or multicast datgram.) 398 */ 399 UDPSTAT_INC(udps_noport); 400 UDPSTAT_INC(udps_noportmcast); 401 goto badheadlocked; 402 } 403 INP_RLOCK(last); 404 INP_INFO_RUNLOCK(pcbinfo); 405 UDP_PROBE(receive, NULL, last, ip6, last, uh); 406 if (udp6_append(last, m, off, &fromsa) == 0) 407 INP_RUNLOCK(last); 408 inp_lost: 409 return (IPPROTO_DONE); 410 } 411 /* 412 * Locate pcb for datagram. 413 */ 414 415 /* 416 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 417 */ 418 if ((m->m_flags & M_IP6_NEXTHOP) && 419 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 420 struct sockaddr_in6 *next_hop6; 421 422 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 423 424 /* 425 * Transparently forwarded. Pretend to be the destination. 426 * Already got one like this? 427 */ 428 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 429 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 430 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); 431 if (!inp) { 432 /* 433 * It's new. Try to find the ambushing socket. 434 * Because we've rewritten the destination address, 435 * any hardware-generated hash is ignored. 436 */ 437 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 438 uh->uh_sport, &next_hop6->sin6_addr, 439 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 440 uh->uh_dport, INPLOOKUP_WILDCARD | 441 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); 442 } 443 /* Remove the tag from the packet. We don't need it anymore. */ 444 m_tag_delete(m, fwd_tag); 445 m->m_flags &= ~M_IP6_NEXTHOP; 446 } else 447 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 448 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 449 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 450 m->m_pkthdr.rcvif, m); 451 if (inp == NULL) { 452 if (udp_log_in_vain) { 453 char ip6bufs[INET6_ADDRSTRLEN]; 454 char ip6bufd[INET6_ADDRSTRLEN]; 455 456 log(LOG_INFO, 457 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 458 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 459 ntohs(uh->uh_dport), 460 ip6_sprintf(ip6bufs, &ip6->ip6_src), 461 ntohs(uh->uh_sport)); 462 } 463 UDPSTAT_INC(udps_noport); 464 if (m->m_flags & M_MCAST) { 465 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 466 UDPSTAT_INC(udps_noportmcast); 467 goto badunlocked; 468 } 469 if (V_udp_blackhole) 470 goto badunlocked; 471 if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0) 472 goto badunlocked; 473 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 474 return (IPPROTO_DONE); 475 } 476 INP_RLOCK_ASSERT(inp); 477 up = intoudpcb(inp); 478 if (cscov_partial) { 479 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 480 INP_RUNLOCK(inp); 481 m_freem(m); 482 return (IPPROTO_DONE); 483 } 484 } 485 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 486 if (udp6_append(inp, m, off, &fromsa) == 0) 487 INP_RUNLOCK(inp); 488 return (IPPROTO_DONE); 489 490 badheadlocked: 491 INP_INFO_RUNLOCK(pcbinfo); 492 badunlocked: 493 if (m) 494 m_freem(m); 495 return (IPPROTO_DONE); 496 } 497 498 static void 499 udp6_common_ctlinput(int cmd, struct sockaddr *sa, void *d, 500 struct inpcbinfo *pcbinfo) 501 { 502 struct udphdr uh; 503 struct ip6_hdr *ip6; 504 struct mbuf *m; 505 int off = 0; 506 struct ip6ctlparam *ip6cp = NULL; 507 const struct sockaddr_in6 *sa6_src = NULL; 508 void *cmdarg; 509 struct inpcb *(*notify)(struct inpcb *, int) = udp_notify; 510 struct udp_portonly { 511 u_int16_t uh_sport; 512 u_int16_t uh_dport; 513 } *uhp; 514 515 if (sa->sa_family != AF_INET6 || 516 sa->sa_len != sizeof(struct sockaddr_in6)) 517 return; 518 519 if ((unsigned)cmd >= PRC_NCMDS) 520 return; 521 if (PRC_IS_REDIRECT(cmd)) 522 notify = in6_rtchange, d = NULL; 523 else if (cmd == PRC_HOSTDEAD) 524 d = NULL; 525 else if (inet6ctlerrmap[cmd] == 0) 526 return; 527 528 /* if the parameter is from icmp6, decode it. */ 529 if (d != NULL) { 530 ip6cp = (struct ip6ctlparam *)d; 531 m = ip6cp->ip6c_m; 532 ip6 = ip6cp->ip6c_ip6; 533 off = ip6cp->ip6c_off; 534 cmdarg = ip6cp->ip6c_cmdarg; 535 sa6_src = ip6cp->ip6c_src; 536 } else { 537 m = NULL; 538 ip6 = NULL; 539 cmdarg = NULL; 540 sa6_src = &sa6_any; 541 } 542 543 if (ip6) { 544 /* 545 * XXX: We assume that when IPV6 is non NULL, 546 * M and OFF are valid. 547 */ 548 549 /* Check if we can safely examine src and dst ports. */ 550 if (m->m_pkthdr.len < off + sizeof(*uhp)) 551 return; 552 553 bzero(&uh, sizeof(uh)); 554 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 555 556 (void)in6_pcbnotify(pcbinfo, sa, uh.uh_dport, 557 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd, 558 cmdarg, notify); 559 } else 560 (void)in6_pcbnotify(pcbinfo, sa, 0, 561 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 562 } 563 564 void 565 udp6_ctlinput(int cmd, struct sockaddr *sa, void *d) 566 { 567 568 return (udp6_common_ctlinput(cmd, sa, d, &V_udbinfo)); 569 } 570 571 void 572 udplite6_ctlinput(int cmd, struct sockaddr *sa, void *d) 573 { 574 575 return (udp6_common_ctlinput(cmd, sa, d, &V_ulitecbinfo)); 576 } 577 578 static int 579 udp6_getcred(SYSCTL_HANDLER_ARGS) 580 { 581 struct xucred xuc; 582 struct sockaddr_in6 addrs[2]; 583 struct inpcb *inp; 584 int error; 585 586 error = priv_check(req->td, PRIV_NETINET_GETCRED); 587 if (error) 588 return (error); 589 590 if (req->newlen != sizeof(addrs)) 591 return (EINVAL); 592 if (req->oldlen != sizeof(struct xucred)) 593 return (EINVAL); 594 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 595 if (error) 596 return (error); 597 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 598 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 599 return (error); 600 } 601 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 602 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 603 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 604 if (inp != NULL) { 605 INP_RLOCK_ASSERT(inp); 606 if (inp->inp_socket == NULL) 607 error = ENOENT; 608 if (error == 0) 609 error = cr_canseesocket(req->td->td_ucred, 610 inp->inp_socket); 611 if (error == 0) 612 cru2x(inp->inp_cred, &xuc); 613 INP_RUNLOCK(inp); 614 } else 615 error = ENOENT; 616 if (error == 0) 617 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 618 return (error); 619 } 620 621 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0, 622 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 623 624 static int 625 udp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6, 626 struct mbuf *control, struct thread *td) 627 { 628 u_int32_t ulen = m->m_pkthdr.len; 629 u_int32_t plen = sizeof(struct udphdr) + ulen; 630 struct ip6_hdr *ip6; 631 struct udphdr *udp6; 632 struct in6_addr *laddr, *faddr, in6a; 633 struct sockaddr_in6 *sin6 = NULL; 634 int cscov_partial = 0; 635 int scope_ambiguous = 0; 636 u_short fport; 637 int error = 0; 638 uint8_t nxt; 639 uint16_t cscov = 0; 640 struct ip6_pktopts *optp, opt; 641 int af = AF_INET6, hlen = sizeof(struct ip6_hdr); 642 int flags; 643 struct sockaddr_in6 tmp; 644 645 INP_WLOCK_ASSERT(inp); 646 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 647 648 if (addr6) { 649 /* addr6 has been validated in udp6_send(). */ 650 sin6 = (struct sockaddr_in6 *)addr6; 651 652 /* protect *sin6 from overwrites */ 653 tmp = *sin6; 654 sin6 = &tmp; 655 656 /* 657 * Application should provide a proper zone ID or the use of 658 * default zone IDs should be enabled. Unfortunately, some 659 * applications do not behave as it should, so we need a 660 * workaround. Even if an appropriate ID is not determined, 661 * we'll see if we can determine the outgoing interface. If we 662 * can, determine the zone ID based on the interface below. 663 */ 664 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 665 scope_ambiguous = 1; 666 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 667 return (error); 668 } 669 670 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 671 IPPROTO_UDP : IPPROTO_UDPLITE; 672 if (control) { 673 if ((error = ip6_setpktopts(control, &opt, 674 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) 675 goto release; 676 optp = &opt; 677 } else 678 optp = inp->in6p_outputopts; 679 680 if (sin6) { 681 faddr = &sin6->sin6_addr; 682 683 /* 684 * Since we saw no essential reason for calling in_pcbconnect, 685 * we get rid of such kind of logic, and call in6_selectsrc 686 * and in6_pcbsetport in order to fill in the local address 687 * and the local port. 688 */ 689 if (sin6->sin6_port == 0) { 690 error = EADDRNOTAVAIL; 691 goto release; 692 } 693 694 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 695 /* how about ::ffff:0.0.0.0 case? */ 696 error = EISCONN; 697 goto release; 698 } 699 700 fport = sin6->sin6_port; /* allow 0 port */ 701 702 if (IN6_IS_ADDR_V4MAPPED(faddr)) { 703 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 704 /* 705 * I believe we should explicitly discard the 706 * packet when mapped addresses are disabled, 707 * rather than send the packet as an IPv6 one. 708 * If we chose the latter approach, the packet 709 * might be sent out on the wire based on the 710 * default route, the situation which we'd 711 * probably want to avoid. 712 * (20010421 jinmei@kame.net) 713 */ 714 error = EINVAL; 715 goto release; 716 } 717 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 718 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 719 /* 720 * when remote addr is an IPv4-mapped address, 721 * local addr should not be an IPv6 address, 722 * since you cannot determine how to map IPv6 723 * source address to IPv4. 724 */ 725 error = EINVAL; 726 goto release; 727 } 728 729 af = AF_INET; 730 } 731 732 if (!IN6_IS_ADDR_V4MAPPED(faddr)) { 733 error = in6_selectsrc_socket(sin6, optp, inp, 734 td->td_ucred, scope_ambiguous, &in6a, NULL); 735 if (error) 736 goto release; 737 laddr = &in6a; 738 } else 739 laddr = &inp->in6p_laddr; /* XXX */ 740 if (laddr == NULL) { 741 if (error == 0) 742 error = EADDRNOTAVAIL; 743 goto release; 744 } 745 if (inp->inp_lport == 0 && 746 (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) { 747 /* Undo an address bind that may have occurred. */ 748 inp->in6p_laddr = in6addr_any; 749 goto release; 750 } 751 } else { 752 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 753 error = ENOTCONN; 754 goto release; 755 } 756 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) { 757 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 758 /* 759 * XXX: this case would happen when the 760 * application sets the V6ONLY flag after 761 * connecting the foreign address. 762 * Such applications should be fixed, 763 * so we bark here. 764 */ 765 log(LOG_INFO, "udp6_output: IPV6_V6ONLY " 766 "option was set for a connected socket\n"); 767 error = EINVAL; 768 goto release; 769 } else 770 af = AF_INET; 771 } 772 laddr = &inp->in6p_laddr; 773 faddr = &inp->in6p_faddr; 774 fport = inp->inp_fport; 775 } 776 777 if (af == AF_INET) 778 hlen = sizeof(struct ip); 779 780 /* 781 * Calculate data length and get a mbuf 782 * for UDP and IP6 headers. 783 */ 784 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 785 if (m == NULL) { 786 error = ENOBUFS; 787 goto release; 788 } 789 790 /* 791 * Stuff checksum and output datagram. 792 */ 793 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 794 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 795 udp6->uh_dport = fport; 796 if (nxt == IPPROTO_UDPLITE) { 797 struct udpcb *up; 798 799 up = intoudpcb(inp); 800 cscov = up->u_txcslen; 801 if (cscov >= plen) 802 cscov = 0; 803 udp6->uh_ulen = htons(cscov); 804 /* 805 * For UDP-Lite, checksum coverage length of zero means 806 * the entire UDPLite packet is covered by the checksum. 807 */ 808 cscov_partial = (cscov == 0) ? 0 : 1; 809 } else if (plen <= 0xffff) 810 udp6->uh_ulen = htons((u_short)plen); 811 else 812 udp6->uh_ulen = 0; 813 udp6->uh_sum = 0; 814 815 switch (af) { 816 case AF_INET6: 817 ip6 = mtod(m, struct ip6_hdr *); 818 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 819 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 820 ip6->ip6_vfc |= IPV6_VERSION; 821 ip6->ip6_plen = htons((u_short)plen); 822 ip6->ip6_nxt = nxt; 823 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 824 ip6->ip6_src = *laddr; 825 ip6->ip6_dst = *faddr; 826 827 if (cscov_partial) { 828 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 829 sizeof(struct ip6_hdr), plen, cscov)) == 0) 830 udp6->uh_sum = 0xffff; 831 } else { 832 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 833 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 834 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 835 } 836 837 #ifdef RSS 838 { 839 uint32_t hash_val, hash_type; 840 uint8_t pr; 841 842 pr = inp->inp_socket->so_proto->pr_protocol; 843 /* 844 * Calculate an appropriate RSS hash for UDP and 845 * UDP Lite. 846 * 847 * The called function will take care of figuring out 848 * whether a 2-tuple or 4-tuple hash is required based 849 * on the currently configured scheme. 850 * 851 * Later later on connected socket values should be 852 * cached in the inpcb and reused, rather than constantly 853 * re-calculating it. 854 * 855 * UDP Lite is a different protocol number and will 856 * likely end up being hashed as a 2-tuple until 857 * RSS / NICs grow UDP Lite protocol awareness. 858 */ 859 if (rss_proto_software_hash_v6(faddr, laddr, fport, 860 inp->inp_lport, pr, &hash_val, &hash_type) == 0) { 861 m->m_pkthdr.flowid = hash_val; 862 M_HASHTYPE_SET(m, hash_type); 863 } 864 } 865 #endif 866 flags = 0; 867 #ifdef RSS 868 /* 869 * Don't override with the inp cached flowid. 870 * 871 * Until the whole UDP path is vetted, it may actually 872 * be incorrect. 873 */ 874 flags |= IP_NODEFAULTFLOWID; 875 #endif 876 877 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 878 UDPSTAT_INC(udps_opackets); 879 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions, 880 NULL, inp); 881 break; 882 case AF_INET: 883 error = EAFNOSUPPORT; 884 goto release; 885 } 886 goto releaseopt; 887 888 release: 889 m_freem(m); 890 891 releaseopt: 892 if (control) { 893 ip6_clearpktopts(&opt, -1); 894 m_freem(control); 895 } 896 return (error); 897 } 898 899 static void 900 udp6_abort(struct socket *so) 901 { 902 struct inpcb *inp; 903 struct inpcbinfo *pcbinfo; 904 905 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 906 inp = sotoinpcb(so); 907 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 908 909 INP_WLOCK(inp); 910 #ifdef INET 911 if (inp->inp_vflag & INP_IPV4) { 912 struct pr_usrreqs *pru; 913 uint8_t nxt; 914 915 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 916 IPPROTO_UDP : IPPROTO_UDPLITE; 917 INP_WUNLOCK(inp); 918 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 919 (*pru->pru_abort)(so); 920 return; 921 } 922 #endif 923 924 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 925 INP_HASH_WLOCK(pcbinfo); 926 in6_pcbdisconnect(inp); 927 inp->in6p_laddr = in6addr_any; 928 INP_HASH_WUNLOCK(pcbinfo); 929 soisdisconnected(so); 930 } 931 INP_WUNLOCK(inp); 932 } 933 934 static int 935 udp6_attach(struct socket *so, int proto, struct thread *td) 936 { 937 struct inpcb *inp; 938 struct inpcbinfo *pcbinfo; 939 int error; 940 941 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 942 inp = sotoinpcb(so); 943 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 944 945 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 946 error = soreserve(so, udp_sendspace, udp_recvspace); 947 if (error) 948 return (error); 949 } 950 INP_INFO_WLOCK(pcbinfo); 951 error = in_pcballoc(so, pcbinfo); 952 if (error) { 953 INP_INFO_WUNLOCK(pcbinfo); 954 return (error); 955 } 956 inp = (struct inpcb *)so->so_pcb; 957 inp->inp_vflag |= INP_IPV6; 958 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 959 inp->inp_vflag |= INP_IPV4; 960 inp->in6p_hops = -1; /* use kernel default */ 961 inp->in6p_cksum = -1; /* just to be sure */ 962 /* 963 * XXX: ugly!! 964 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 965 * because the socket may be bound to an IPv6 wildcard address, 966 * which may match an IPv4-mapped IPv6 address. 967 */ 968 inp->inp_ip_ttl = V_ip_defttl; 969 970 error = udp_newudpcb(inp); 971 if (error) { 972 in_pcbdetach(inp); 973 in_pcbfree(inp); 974 INP_INFO_WUNLOCK(pcbinfo); 975 return (error); 976 } 977 INP_WUNLOCK(inp); 978 INP_INFO_WUNLOCK(pcbinfo); 979 return (0); 980 } 981 982 static int 983 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 984 { 985 struct inpcb *inp; 986 struct inpcbinfo *pcbinfo; 987 int error; 988 989 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 990 inp = sotoinpcb(so); 991 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 992 993 INP_WLOCK(inp); 994 INP_HASH_WLOCK(pcbinfo); 995 inp->inp_vflag &= ~INP_IPV4; 996 inp->inp_vflag |= INP_IPV6; 997 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 998 struct sockaddr_in6 *sin6_p; 999 1000 sin6_p = (struct sockaddr_in6 *)nam; 1001 1002 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1003 inp->inp_vflag |= INP_IPV4; 1004 #ifdef INET 1005 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1006 struct sockaddr_in sin; 1007 1008 in6_sin6_2_sin(&sin, sin6_p); 1009 inp->inp_vflag |= INP_IPV4; 1010 inp->inp_vflag &= ~INP_IPV6; 1011 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1012 td->td_ucred); 1013 goto out; 1014 } 1015 #endif 1016 } 1017 1018 error = in6_pcbbind(inp, nam, td->td_ucred); 1019 #ifdef INET 1020 out: 1021 #endif 1022 INP_HASH_WUNLOCK(pcbinfo); 1023 INP_WUNLOCK(inp); 1024 return (error); 1025 } 1026 1027 static void 1028 udp6_close(struct socket *so) 1029 { 1030 struct inpcb *inp; 1031 struct inpcbinfo *pcbinfo; 1032 1033 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1034 inp = sotoinpcb(so); 1035 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1036 1037 INP_WLOCK(inp); 1038 #ifdef INET 1039 if (inp->inp_vflag & INP_IPV4) { 1040 struct pr_usrreqs *pru; 1041 uint8_t nxt; 1042 1043 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 1044 IPPROTO_UDP : IPPROTO_UDPLITE; 1045 INP_WUNLOCK(inp); 1046 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1047 (*pru->pru_disconnect)(so); 1048 return; 1049 } 1050 #endif 1051 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1052 INP_HASH_WLOCK(pcbinfo); 1053 in6_pcbdisconnect(inp); 1054 inp->in6p_laddr = in6addr_any; 1055 INP_HASH_WUNLOCK(pcbinfo); 1056 soisdisconnected(so); 1057 } 1058 INP_WUNLOCK(inp); 1059 } 1060 1061 static int 1062 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1063 { 1064 struct inpcb *inp; 1065 struct inpcbinfo *pcbinfo; 1066 struct sockaddr_in6 *sin6; 1067 int error; 1068 1069 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1070 inp = sotoinpcb(so); 1071 sin6 = (struct sockaddr_in6 *)nam; 1072 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1073 1074 /* 1075 * XXXRW: Need to clarify locking of v4/v6 flags. 1076 */ 1077 INP_WLOCK(inp); 1078 #ifdef INET 1079 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1080 struct sockaddr_in sin; 1081 1082 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1083 error = EINVAL; 1084 goto out; 1085 } 1086 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1087 error = EISCONN; 1088 goto out; 1089 } 1090 in6_sin6_2_sin(&sin, sin6); 1091 inp->inp_vflag |= INP_IPV4; 1092 inp->inp_vflag &= ~INP_IPV6; 1093 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1094 if (error != 0) 1095 goto out; 1096 INP_HASH_WLOCK(pcbinfo); 1097 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1098 td->td_ucred); 1099 INP_HASH_WUNLOCK(pcbinfo); 1100 if (error == 0) 1101 soisconnected(so); 1102 goto out; 1103 } 1104 #endif 1105 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1106 error = EISCONN; 1107 goto out; 1108 } 1109 inp->inp_vflag &= ~INP_IPV4; 1110 inp->inp_vflag |= INP_IPV6; 1111 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1112 if (error != 0) 1113 goto out; 1114 INP_HASH_WLOCK(pcbinfo); 1115 error = in6_pcbconnect(inp, nam, td->td_ucred); 1116 INP_HASH_WUNLOCK(pcbinfo); 1117 if (error == 0) 1118 soisconnected(so); 1119 out: 1120 INP_WUNLOCK(inp); 1121 return (error); 1122 } 1123 1124 static void 1125 udp6_detach(struct socket *so) 1126 { 1127 struct inpcb *inp; 1128 struct inpcbinfo *pcbinfo; 1129 struct udpcb *up; 1130 1131 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1132 inp = sotoinpcb(so); 1133 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1134 1135 INP_INFO_WLOCK(pcbinfo); 1136 INP_WLOCK(inp); 1137 up = intoudpcb(inp); 1138 KASSERT(up != NULL, ("%s: up == NULL", __func__)); 1139 in_pcbdetach(inp); 1140 in_pcbfree(inp); 1141 INP_INFO_WUNLOCK(pcbinfo); 1142 udp_discardcb(up); 1143 } 1144 1145 static int 1146 udp6_disconnect(struct socket *so) 1147 { 1148 struct inpcb *inp; 1149 struct inpcbinfo *pcbinfo; 1150 int error; 1151 1152 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1153 inp = sotoinpcb(so); 1154 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1155 1156 INP_WLOCK(inp); 1157 #ifdef INET 1158 if (inp->inp_vflag & INP_IPV4) { 1159 struct pr_usrreqs *pru; 1160 uint8_t nxt; 1161 1162 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 1163 IPPROTO_UDP : IPPROTO_UDPLITE; 1164 INP_WUNLOCK(inp); 1165 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1166 (void)(*pru->pru_disconnect)(so); 1167 return (0); 1168 } 1169 #endif 1170 1171 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1172 error = ENOTCONN; 1173 goto out; 1174 } 1175 1176 INP_HASH_WLOCK(pcbinfo); 1177 in6_pcbdisconnect(inp); 1178 inp->in6p_laddr = in6addr_any; 1179 INP_HASH_WUNLOCK(pcbinfo); 1180 SOCK_LOCK(so); 1181 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1182 SOCK_UNLOCK(so); 1183 out: 1184 INP_WUNLOCK(inp); 1185 return (0); 1186 } 1187 1188 static int 1189 udp6_send(struct socket *so, int flags, struct mbuf *m, 1190 struct sockaddr *addr, struct mbuf *control, struct thread *td) 1191 { 1192 struct inpcb *inp; 1193 struct inpcbinfo *pcbinfo; 1194 int error = 0; 1195 1196 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1197 inp = sotoinpcb(so); 1198 KASSERT(inp != NULL, ("udp6_send: inp == NULL")); 1199 1200 INP_WLOCK(inp); 1201 if (addr) { 1202 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 1203 error = EINVAL; 1204 goto bad; 1205 } 1206 if (addr->sa_family != AF_INET6) { 1207 error = EAFNOSUPPORT; 1208 goto bad; 1209 } 1210 } 1211 1212 #ifdef INET 1213 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1214 int hasv4addr; 1215 struct sockaddr_in6 *sin6 = 0; 1216 1217 if (addr == 0) 1218 hasv4addr = (inp->inp_vflag & INP_IPV4); 1219 else { 1220 sin6 = (struct sockaddr_in6 *)addr; 1221 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 1222 ? 1 : 0; 1223 } 1224 if (hasv4addr) { 1225 struct pr_usrreqs *pru; 1226 uint8_t nxt; 1227 1228 nxt = (inp->inp_socket->so_proto->pr_protocol == 1229 IPPROTO_UDP) ? IPPROTO_UDP : IPPROTO_UDPLITE; 1230 /* 1231 * XXXRW: We release UDP-layer locks before calling 1232 * udp_send() in order to avoid recursion. However, 1233 * this does mean there is a short window where inp's 1234 * fields are unstable. Could this lead to a 1235 * potential race in which the factors causing us to 1236 * select the UDPv4 output routine are invalidated? 1237 */ 1238 INP_WUNLOCK(inp); 1239 if (sin6) 1240 in6_sin6_2_sin_in_sock(addr); 1241 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1242 /* addr will just be freed in sendit(). */ 1243 return ((*pru->pru_send)(so, flags, m, addr, control, 1244 td)); 1245 } 1246 } 1247 #endif 1248 #ifdef MAC 1249 mac_inpcb_create_mbuf(inp, m); 1250 #endif 1251 INP_HASH_WLOCK(pcbinfo); 1252 error = udp6_output(inp, m, addr, control, td); 1253 INP_HASH_WUNLOCK(pcbinfo); 1254 INP_WUNLOCK(inp); 1255 return (error); 1256 1257 bad: 1258 INP_WUNLOCK(inp); 1259 m_freem(m); 1260 return (error); 1261 } 1262 1263 struct pr_usrreqs udp6_usrreqs = { 1264 .pru_abort = udp6_abort, 1265 .pru_attach = udp6_attach, 1266 .pru_bind = udp6_bind, 1267 .pru_connect = udp6_connect, 1268 .pru_control = in6_control, 1269 .pru_detach = udp6_detach, 1270 .pru_disconnect = udp6_disconnect, 1271 .pru_peeraddr = in6_mapped_peeraddr, 1272 .pru_send = udp6_send, 1273 .pru_shutdown = udp_shutdown, 1274 .pru_sockaddr = in6_mapped_sockaddr, 1275 .pru_soreceive = soreceive_dgram, 1276 .pru_sosend = sosend_dgram, 1277 .pru_sosetlabel = in_pcbsosetlabel, 1278 .pru_close = udp6_close 1279 }; 1280