udp6_usrreq.c revision 288065
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: head/sys/netinet6/udp6_usrreq.c 288065 2015-09-21 12:32:36Z bz $"); 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 136extern struct protosw inetsw[]; 137static void udp6_detach(struct socket *so); 138 139static int 140udp6_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 194int 195udp6_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 490badheadlocked: 491 INP_INFO_RUNLOCK(pcbinfo); 492badunlocked: 493 if (m) 494 m_freem(m); 495 return (IPPROTO_DONE); 496} 497 498static void 499udp6_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 564void 565udp6_ctlinput(int cmd, struct sockaddr *sa, void *d) 566{ 567 568 return (udp6_common_ctlinput(cmd, sa, d, &V_udbinfo)); 569} 570 571void 572udplite6_ctlinput(int cmd, struct sockaddr *sa, void *d) 573{ 574 575 return (udp6_common_ctlinput(cmd, sa, d, &V_ulitecbinfo)); 576} 577 578static int 579udp6_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 621SYSCTL_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 624static int 625udp6_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 struct ifnet *oifp = NULL; 635 int cscov_partial = 0; 636 int scope_ambiguous = 0; 637 u_short fport; 638 int error = 0; 639 uint8_t nxt; 640 uint16_t cscov = 0; 641 struct ip6_pktopts *optp, opt; 642 int af = AF_INET6, hlen = sizeof(struct ip6_hdr); 643 int flags; 644 struct sockaddr_in6 tmp; 645 646 INP_WLOCK_ASSERT(inp); 647 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 648 649 if (addr6) { 650 /* addr6 has been validated in udp6_send(). */ 651 sin6 = (struct sockaddr_in6 *)addr6; 652 653 /* protect *sin6 from overwrites */ 654 tmp = *sin6; 655 sin6 = &tmp; 656 657 /* 658 * Application should provide a proper zone ID or the use of 659 * default zone IDs should be enabled. Unfortunately, some 660 * applications do not behave as it should, so we need a 661 * workaround. Even if an appropriate ID is not determined, 662 * we'll see if we can determine the outgoing interface. If we 663 * can, determine the zone ID based on the interface below. 664 */ 665 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 666 scope_ambiguous = 1; 667 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 668 return (error); 669 } 670 671 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 672 IPPROTO_UDP : IPPROTO_UDPLITE; 673 if (control) { 674 if ((error = ip6_setpktopts(control, &opt, 675 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) 676 goto release; 677 optp = &opt; 678 } else 679 optp = inp->in6p_outputopts; 680 681 if (sin6) { 682 faddr = &sin6->sin6_addr; 683 684 /* 685 * Since we saw no essential reason for calling in_pcbconnect, 686 * we get rid of such kind of logic, and call in6_selectsrc 687 * and in6_pcbsetport in order to fill in the local address 688 * and the local port. 689 */ 690 if (sin6->sin6_port == 0) { 691 error = EADDRNOTAVAIL; 692 goto release; 693 } 694 695 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 696 /* how about ::ffff:0.0.0.0 case? */ 697 error = EISCONN; 698 goto release; 699 } 700 701 fport = sin6->sin6_port; /* allow 0 port */ 702 703 if (IN6_IS_ADDR_V4MAPPED(faddr)) { 704 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 705 /* 706 * I believe we should explicitly discard the 707 * packet when mapped addresses are disabled, 708 * rather than send the packet as an IPv6 one. 709 * If we chose the latter approach, the packet 710 * might be sent out on the wire based on the 711 * default route, the situation which we'd 712 * probably want to avoid. 713 * (20010421 jinmei@kame.net) 714 */ 715 error = EINVAL; 716 goto release; 717 } 718 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 719 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 720 /* 721 * when remote addr is an IPv4-mapped address, 722 * local addr should not be an IPv6 address, 723 * since you cannot determine how to map IPv6 724 * source address to IPv4. 725 */ 726 error = EINVAL; 727 goto release; 728 } 729 730 af = AF_INET; 731 } 732 733 if (!IN6_IS_ADDR_V4MAPPED(faddr)) { 734 error = in6_selectsrc(sin6, optp, inp, NULL, 735 td->td_ucred, &oifp, &in6a); 736 if (error) 737 goto release; 738 if (oifp && scope_ambiguous && 739 (error = in6_setscope(&sin6->sin6_addr, 740 oifp, NULL))) { 741 goto release; 742 } 743 laddr = &in6a; 744 } else 745 laddr = &inp->in6p_laddr; /* XXX */ 746 if (laddr == NULL) { 747 if (error == 0) 748 error = EADDRNOTAVAIL; 749 goto release; 750 } 751 if (inp->inp_lport == 0 && 752 (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) { 753 /* Undo an address bind that may have occurred. */ 754 inp->in6p_laddr = in6addr_any; 755 goto release; 756 } 757 } else { 758 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 759 error = ENOTCONN; 760 goto release; 761 } 762 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) { 763 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 764 /* 765 * XXX: this case would happen when the 766 * application sets the V6ONLY flag after 767 * connecting the foreign address. 768 * Such applications should be fixed, 769 * so we bark here. 770 */ 771 log(LOG_INFO, "udp6_output: IPV6_V6ONLY " 772 "option was set for a connected socket\n"); 773 error = EINVAL; 774 goto release; 775 } else 776 af = AF_INET; 777 } 778 laddr = &inp->in6p_laddr; 779 faddr = &inp->in6p_faddr; 780 fport = inp->inp_fport; 781 } 782 783 if (af == AF_INET) 784 hlen = sizeof(struct ip); 785 786 /* 787 * Calculate data length and get a mbuf 788 * for UDP and IP6 headers. 789 */ 790 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 791 if (m == 0) { 792 error = ENOBUFS; 793 goto release; 794 } 795 796 /* 797 * Stuff checksum and output datagram. 798 */ 799 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 800 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 801 udp6->uh_dport = fport; 802 if (nxt == IPPROTO_UDPLITE) { 803 struct udpcb *up; 804 805 up = intoudpcb(inp); 806 cscov = up->u_txcslen; 807 if (cscov >= plen) 808 cscov = 0; 809 udp6->uh_ulen = htons(cscov); 810 /* 811 * For UDP-Lite, checksum coverage length of zero means 812 * the entire UDPLite packet is covered by the checksum. 813 */ 814 cscov_partial = (cscov == 0) ? 0 : 1; 815 } else if (plen <= 0xffff) 816 udp6->uh_ulen = htons((u_short)plen); 817 else 818 udp6->uh_ulen = 0; 819 udp6->uh_sum = 0; 820 821 switch (af) { 822 case AF_INET6: 823 ip6 = mtod(m, struct ip6_hdr *); 824 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 825 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 826 ip6->ip6_vfc |= IPV6_VERSION; 827 ip6->ip6_plen = htons((u_short)plen); 828 ip6->ip6_nxt = nxt; 829 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 830 ip6->ip6_src = *laddr; 831 ip6->ip6_dst = *faddr; 832 833 if (cscov_partial) { 834 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 835 sizeof(struct ip6_hdr), plen, cscov)) == 0) 836 udp6->uh_sum = 0xffff; 837 } else { 838 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 839 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 840 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 841 } 842 843#ifdef RSS 844 { 845 uint32_t hash_val, hash_type; 846 uint8_t pr; 847 848 pr = inp->inp_socket->so_proto->pr_protocol; 849 /* 850 * Calculate an appropriate RSS hash for UDP and 851 * UDP Lite. 852 * 853 * The called function will take care of figuring out 854 * whether a 2-tuple or 4-tuple hash is required based 855 * on the currently configured scheme. 856 * 857 * Later later on connected socket values should be 858 * cached in the inpcb and reused, rather than constantly 859 * re-calculating it. 860 * 861 * UDP Lite is a different protocol number and will 862 * likely end up being hashed as a 2-tuple until 863 * RSS / NICs grow UDP Lite protocol awareness. 864 */ 865 if (rss_proto_software_hash_v6(faddr, laddr, fport, 866 inp->inp_lport, pr, &hash_val, &hash_type) == 0) { 867 m->m_pkthdr.flowid = hash_val; 868 M_HASHTYPE_SET(m, hash_type); 869 } 870 } 871#endif 872 flags = 0; 873#ifdef RSS 874 /* 875 * Don't override with the inp cached flowid. 876 * 877 * Until the whole UDP path is vetted, it may actually 878 * be incorrect. 879 */ 880 flags |= IP_NODEFAULTFLOWID; 881#endif 882 883 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 884 UDPSTAT_INC(udps_opackets); 885 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions, 886 NULL, inp); 887 break; 888 case AF_INET: 889 error = EAFNOSUPPORT; 890 goto release; 891 } 892 goto releaseopt; 893 894release: 895 m_freem(m); 896 897releaseopt: 898 if (control) { 899 ip6_clearpktopts(&opt, -1); 900 m_freem(control); 901 } 902 return (error); 903} 904 905static void 906udp6_abort(struct socket *so) 907{ 908 struct inpcb *inp; 909 struct inpcbinfo *pcbinfo; 910 911 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 912 inp = sotoinpcb(so); 913 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 914 915 INP_WLOCK(inp); 916#ifdef INET 917 if (inp->inp_vflag & INP_IPV4) { 918 struct pr_usrreqs *pru; 919 uint8_t nxt; 920 921 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 922 IPPROTO_UDP : IPPROTO_UDPLITE; 923 INP_WUNLOCK(inp); 924 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 925 (*pru->pru_abort)(so); 926 return; 927 } 928#endif 929 930 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 931 INP_HASH_WLOCK(pcbinfo); 932 in6_pcbdisconnect(inp); 933 inp->in6p_laddr = in6addr_any; 934 INP_HASH_WUNLOCK(pcbinfo); 935 soisdisconnected(so); 936 } 937 INP_WUNLOCK(inp); 938} 939 940static int 941udp6_attach(struct socket *so, int proto, struct thread *td) 942{ 943 struct inpcb *inp; 944 struct inpcbinfo *pcbinfo; 945 int error; 946 947 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 948 inp = sotoinpcb(so); 949 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 950 951 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 952 error = soreserve(so, udp_sendspace, udp_recvspace); 953 if (error) 954 return (error); 955 } 956 INP_INFO_WLOCK(pcbinfo); 957 error = in_pcballoc(so, pcbinfo); 958 if (error) { 959 INP_INFO_WUNLOCK(pcbinfo); 960 return (error); 961 } 962 inp = (struct inpcb *)so->so_pcb; 963 inp->inp_vflag |= INP_IPV6; 964 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 965 inp->inp_vflag |= INP_IPV4; 966 inp->in6p_hops = -1; /* use kernel default */ 967 inp->in6p_cksum = -1; /* just to be sure */ 968 /* 969 * XXX: ugly!! 970 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 971 * because the socket may be bound to an IPv6 wildcard address, 972 * which may match an IPv4-mapped IPv6 address. 973 */ 974 inp->inp_ip_ttl = V_ip_defttl; 975 976 error = udp_newudpcb(inp); 977 if (error) { 978 in_pcbdetach(inp); 979 in_pcbfree(inp); 980 INP_INFO_WUNLOCK(pcbinfo); 981 return (error); 982 } 983 INP_WUNLOCK(inp); 984 INP_INFO_WUNLOCK(pcbinfo); 985 return (0); 986} 987 988static int 989udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 990{ 991 struct inpcb *inp; 992 struct inpcbinfo *pcbinfo; 993 int error; 994 995 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 996 inp = sotoinpcb(so); 997 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 998 999 INP_WLOCK(inp); 1000 INP_HASH_WLOCK(pcbinfo); 1001 inp->inp_vflag &= ~INP_IPV4; 1002 inp->inp_vflag |= INP_IPV6; 1003 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1004 struct sockaddr_in6 *sin6_p; 1005 1006 sin6_p = (struct sockaddr_in6 *)nam; 1007 1008 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1009 inp->inp_vflag |= INP_IPV4; 1010#ifdef INET 1011 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1012 struct sockaddr_in sin; 1013 1014 in6_sin6_2_sin(&sin, sin6_p); 1015 inp->inp_vflag |= INP_IPV4; 1016 inp->inp_vflag &= ~INP_IPV6; 1017 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1018 td->td_ucred); 1019 goto out; 1020 } 1021#endif 1022 } 1023 1024 error = in6_pcbbind(inp, nam, td->td_ucred); 1025#ifdef INET 1026out: 1027#endif 1028 INP_HASH_WUNLOCK(pcbinfo); 1029 INP_WUNLOCK(inp); 1030 return (error); 1031} 1032 1033static void 1034udp6_close(struct socket *so) 1035{ 1036 struct inpcb *inp; 1037 struct inpcbinfo *pcbinfo; 1038 1039 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1040 inp = sotoinpcb(so); 1041 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1042 1043 INP_WLOCK(inp); 1044#ifdef INET 1045 if (inp->inp_vflag & INP_IPV4) { 1046 struct pr_usrreqs *pru; 1047 uint8_t nxt; 1048 1049 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 1050 IPPROTO_UDP : IPPROTO_UDPLITE; 1051 INP_WUNLOCK(inp); 1052 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1053 (*pru->pru_disconnect)(so); 1054 return; 1055 } 1056#endif 1057 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1058 INP_HASH_WLOCK(pcbinfo); 1059 in6_pcbdisconnect(inp); 1060 inp->in6p_laddr = in6addr_any; 1061 INP_HASH_WUNLOCK(pcbinfo); 1062 soisdisconnected(so); 1063 } 1064 INP_WUNLOCK(inp); 1065} 1066 1067static int 1068udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1069{ 1070 struct inpcb *inp; 1071 struct inpcbinfo *pcbinfo; 1072 struct sockaddr_in6 *sin6; 1073 int error; 1074 1075 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1076 inp = sotoinpcb(so); 1077 sin6 = (struct sockaddr_in6 *)nam; 1078 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1079 1080 /* 1081 * XXXRW: Need to clarify locking of v4/v6 flags. 1082 */ 1083 INP_WLOCK(inp); 1084#ifdef INET 1085 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1086 struct sockaddr_in sin; 1087 1088 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1089 error = EINVAL; 1090 goto out; 1091 } 1092 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1093 error = EISCONN; 1094 goto out; 1095 } 1096 in6_sin6_2_sin(&sin, sin6); 1097 inp->inp_vflag |= INP_IPV4; 1098 inp->inp_vflag &= ~INP_IPV6; 1099 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1100 if (error != 0) 1101 goto out; 1102 INP_HASH_WLOCK(pcbinfo); 1103 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1104 td->td_ucred); 1105 INP_HASH_WUNLOCK(pcbinfo); 1106 if (error == 0) 1107 soisconnected(so); 1108 goto out; 1109 } 1110#endif 1111 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1112 error = EISCONN; 1113 goto out; 1114 } 1115 inp->inp_vflag &= ~INP_IPV4; 1116 inp->inp_vflag |= INP_IPV6; 1117 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1118 if (error != 0) 1119 goto out; 1120 INP_HASH_WLOCK(pcbinfo); 1121 error = in6_pcbconnect(inp, nam, td->td_ucred); 1122 INP_HASH_WUNLOCK(pcbinfo); 1123 if (error == 0) 1124 soisconnected(so); 1125out: 1126 INP_WUNLOCK(inp); 1127 return (error); 1128} 1129 1130static void 1131udp6_detach(struct socket *so) 1132{ 1133 struct inpcb *inp; 1134 struct inpcbinfo *pcbinfo; 1135 struct udpcb *up; 1136 1137 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1138 inp = sotoinpcb(so); 1139 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1140 1141 INP_INFO_WLOCK(pcbinfo); 1142 INP_WLOCK(inp); 1143 up = intoudpcb(inp); 1144 KASSERT(up != NULL, ("%s: up == NULL", __func__)); 1145 in_pcbdetach(inp); 1146 in_pcbfree(inp); 1147 INP_INFO_WUNLOCK(pcbinfo); 1148 udp_discardcb(up); 1149} 1150 1151static int 1152udp6_disconnect(struct socket *so) 1153{ 1154 struct inpcb *inp; 1155 struct inpcbinfo *pcbinfo; 1156 int error; 1157 1158 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1159 inp = sotoinpcb(so); 1160 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1161 1162 INP_WLOCK(inp); 1163#ifdef INET 1164 if (inp->inp_vflag & INP_IPV4) { 1165 struct pr_usrreqs *pru; 1166 uint8_t nxt; 1167 1168 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 1169 IPPROTO_UDP : IPPROTO_UDPLITE; 1170 INP_WUNLOCK(inp); 1171 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1172 (void)(*pru->pru_disconnect)(so); 1173 return (0); 1174 } 1175#endif 1176 1177 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1178 error = ENOTCONN; 1179 goto out; 1180 } 1181 1182 INP_HASH_WLOCK(pcbinfo); 1183 in6_pcbdisconnect(inp); 1184 inp->in6p_laddr = in6addr_any; 1185 INP_HASH_WUNLOCK(pcbinfo); 1186 SOCK_LOCK(so); 1187 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1188 SOCK_UNLOCK(so); 1189out: 1190 INP_WUNLOCK(inp); 1191 return (0); 1192} 1193 1194static int 1195udp6_send(struct socket *so, int flags, struct mbuf *m, 1196 struct sockaddr *addr, struct mbuf *control, struct thread *td) 1197{ 1198 struct inpcb *inp; 1199 struct inpcbinfo *pcbinfo; 1200 int error = 0; 1201 1202 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); 1203 inp = sotoinpcb(so); 1204 KASSERT(inp != NULL, ("udp6_send: inp == NULL")); 1205 1206 INP_WLOCK(inp); 1207 if (addr) { 1208 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 1209 error = EINVAL; 1210 goto bad; 1211 } 1212 if (addr->sa_family != AF_INET6) { 1213 error = EAFNOSUPPORT; 1214 goto bad; 1215 } 1216 } 1217 1218#ifdef INET 1219 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1220 int hasv4addr; 1221 struct sockaddr_in6 *sin6 = 0; 1222 1223 if (addr == 0) 1224 hasv4addr = (inp->inp_vflag & INP_IPV4); 1225 else { 1226 sin6 = (struct sockaddr_in6 *)addr; 1227 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 1228 ? 1 : 0; 1229 } 1230 if (hasv4addr) { 1231 struct pr_usrreqs *pru; 1232 uint8_t nxt; 1233 1234 nxt = (inp->inp_socket->so_proto->pr_protocol == 1235 IPPROTO_UDP) ? IPPROTO_UDP : IPPROTO_UDPLITE; 1236 /* 1237 * XXXRW: We release UDP-layer locks before calling 1238 * udp_send() in order to avoid recursion. However, 1239 * this does mean there is a short window where inp's 1240 * fields are unstable. Could this lead to a 1241 * potential race in which the factors causing us to 1242 * select the UDPv4 output routine are invalidated? 1243 */ 1244 INP_WUNLOCK(inp); 1245 if (sin6) 1246 in6_sin6_2_sin_in_sock(addr); 1247 pru = inetsw[ip_protox[nxt]].pr_usrreqs; 1248 /* addr will just be freed in sendit(). */ 1249 return ((*pru->pru_send)(so, flags, m, addr, control, 1250 td)); 1251 } 1252 } 1253#endif 1254#ifdef MAC 1255 mac_inpcb_create_mbuf(inp, m); 1256#endif 1257 INP_HASH_WLOCK(pcbinfo); 1258 error = udp6_output(inp, m, addr, control, td); 1259 INP_HASH_WUNLOCK(pcbinfo); 1260 INP_WUNLOCK(inp); 1261 return (error); 1262 1263bad: 1264 INP_WUNLOCK(inp); 1265 m_freem(m); 1266 return (error); 1267} 1268 1269struct pr_usrreqs udp6_usrreqs = { 1270 .pru_abort = udp6_abort, 1271 .pru_attach = udp6_attach, 1272 .pru_bind = udp6_bind, 1273 .pru_connect = udp6_connect, 1274 .pru_control = in6_control, 1275 .pru_detach = udp6_detach, 1276 .pru_disconnect = udp6_disconnect, 1277 .pru_peeraddr = in6_mapped_peeraddr, 1278 .pru_send = udp6_send, 1279 .pru_shutdown = udp_shutdown, 1280 .pru_sockaddr = in6_mapped_sockaddr, 1281 .pru_soreceive = soreceive_dgram, 1282 .pru_sosend = sosend_dgram, 1283 .pru_sosetlabel = in_pcbsosetlabel, 1284 .pru_close = udp6_close 1285}; 1286