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> 100 101 #include <netinet/in.h> 102 #include <netinet/in_kdtrace.h> 103 #include <netinet/in_pcb.h> 104 #include <netinet/in_systm.h> 105 #include <netinet/in_var.h> 106 #include <netinet/ip.h> 107 #include <netinet/ip_icmp.h> 108 #include <netinet/ip6.h> 109 #include <netinet/icmp_var.h> 110 #include <netinet/icmp6.h> 111 #include <netinet/ip_var.h> 112 #include <netinet/udp.h> 113 #include <netinet/udp_var.h> 114 #include <netinet/udplite.h> 115 #include <netinet/in_rss.h> 116 117 #include <netinet6/ip6protosw.h> 118 #include <netinet6/ip6_var.h> 119 #include <netinet6/in6_pcb.h> 120 #include <netinet6/udp6_var.h> 121 #include <netinet6/scope6_var.h> 122 123 #ifdef IPSEC 124 #include <netipsec/ipsec.h> 125 #include <netipsec/ipsec6.h> 126 #endif /* IPSEC */ 127 128 #include <security/mac/mac_framework.h> 129 130 /* 131 * UDP protocol implementation. 132 * Per RFC 768, August, 1980. 133 */ 134 135 extern struct protosw inetsw[]; 136 static void udp6_detach(struct socket *so); 137 138 static void 139 udp6_append(struct inpcb *inp, struct mbuf *n, int off, 140 struct sockaddr_in6 *fromsa) 141 { 142 struct socket *so; 143 struct mbuf *opts; 144 145 INP_LOCK_ASSERT(inp); 146 147 #ifdef IPSEC 148 /* Check AH/ESP integrity. */ 149 if (ipsec6_in_reject(n, inp)) { 150 m_freem(n); 151 IPSEC6STAT_INC(ips_in_polvio); 152 return; 153 } 154 #endif /* IPSEC */ 155 #ifdef MAC 156 if (mac_inpcb_check_deliver(inp, n) != 0) { 157 m_freem(n); 158 return; 159 } 160 #endif 161 opts = NULL; 162 if (inp->inp_flags & INP_CONTROLOPTS || 163 inp->inp_socket->so_options & SO_TIMESTAMP) 164 ip6_savecontrol(inp, n, &opts); 165 m_adj(n, off + sizeof(struct udphdr)); 166 167 so = inp->inp_socket; 168 SOCKBUF_LOCK(&so->so_rcv); 169 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n, 170 opts) == 0) { 171 SOCKBUF_UNLOCK(&so->so_rcv); 172 m_freem(n); 173 if (opts) 174 m_freem(opts); 175 UDPSTAT_INC(udps_fullsock); 176 } else 177 sorwakeup_locked(so); 178 } 179 180 int 181 udp6_input(struct mbuf **mp, int *offp, int proto) 182 { 183 struct mbuf *m = *mp; 184 struct ifnet *ifp; 185 struct ip6_hdr *ip6; 186 struct udphdr *uh; 187 struct inpcb *inp; 188 struct inpcbinfo *pcbinfo; 189 struct udpcb *up; 190 int off = *offp; 191 int cscov_partial; 192 int plen, ulen; 193 struct sockaddr_in6 fromsa; 194 struct m_tag *fwd_tag; 195 uint16_t uh_sum; 196 uint8_t nxt; 197 198 ifp = m->m_pkthdr.rcvif; 199 ip6 = mtod(m, struct ip6_hdr *); 200 201 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 202 /* XXX send icmp6 host/port unreach? */ 203 m_freem(m); 204 return (IPPROTO_DONE); 205 } 206 207 #ifndef PULLDOWN_TEST 208 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 209 ip6 = mtod(m, struct ip6_hdr *); 210 uh = (struct udphdr *)((caddr_t)ip6 + off); 211 #else 212 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh)); 213 if (!uh) 214 return (IPPROTO_DONE); 215 #endif 216 217 UDPSTAT_INC(udps_ipackets); 218 219 /* 220 * Destination port of 0 is illegal, based on RFC768. 221 */ 222 if (uh->uh_dport == 0) 223 goto badunlocked; 224 225 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 226 ulen = ntohs((u_short)uh->uh_ulen); 227 228 nxt = ip6->ip6_nxt; 229 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; 230 if (nxt == IPPROTO_UDPLITE) { 231 /* Zero means checksum over the complete packet. */ 232 if (ulen == 0) 233 ulen = plen; 234 if (ulen == plen) 235 cscov_partial = 0; 236 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { 237 /* XXX: What is the right UDPLite MIB counter? */ 238 goto badunlocked; 239 } 240 if (uh->uh_sum == 0) { 241 /* XXX: What is the right UDPLite MIB counter? */ 242 goto badunlocked; 243 } 244 } else { 245 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { 246 UDPSTAT_INC(udps_badlen); 247 goto badunlocked; 248 } 249 if (uh->uh_sum == 0) { 250 UDPSTAT_INC(udps_nosum); 251 goto badunlocked; 252 } 253 } 254 255 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && 256 !cscov_partial) { 257 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 258 uh_sum = m->m_pkthdr.csum_data; 259 else 260 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, 261 m->m_pkthdr.csum_data); 262 uh_sum ^= 0xffff; 263 } else 264 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); 265 266 if (uh_sum != 0) { 267 UDPSTAT_INC(udps_badsum); 268 goto badunlocked; 269 } 270 271 /* 272 * Construct sockaddr format source address. 273 */ 274 init_sin6(&fromsa, m); 275 fromsa.sin6_port = uh->uh_sport; 276 277 pcbinfo = get_inpcbinfo(nxt); 278 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 279 struct inpcb *last; 280 struct inpcbhead *pcblist; 281 struct ip6_moptions *imo; 282 283 INP_INFO_RLOCK(pcbinfo); 284 /* 285 * In the event that laddr should be set to the link-local 286 * address (this happens in RIPng), the multicast address 287 * specified in the received packet will not match laddr. To 288 * handle this situation, matching is relaxed if the 289 * receiving interface is the same as one specified in the 290 * socket and if the destination multicast address matches 291 * one of the multicast groups specified in the socket. 292 */ 293 294 /* 295 * KAME note: traditionally we dropped udpiphdr from mbuf 296 * here. We need udphdr for IPsec processing so we do that 297 * later. 298 */ 299 pcblist = get_pcblist(nxt); 300 last = NULL; 301 LIST_FOREACH(inp, pcblist, inp_list) { 302 if ((inp->inp_vflag & INP_IPV6) == 0) 303 continue; 304 if (inp->inp_lport != uh->uh_dport) 305 continue; 306 if (inp->inp_fport != 0 && 307 inp->inp_fport != uh->uh_sport) 308 continue; 309 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 310 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 311 &ip6->ip6_dst)) 312 continue; 313 } 314 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 315 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 316 &ip6->ip6_src) || 317 inp->inp_fport != uh->uh_sport) 318 continue; 319 } 320 321 /* 322 * XXXRW: Because we weren't holding either the inpcb 323 * or the hash lock when we checked for a match 324 * before, we should probably recheck now that the 325 * inpcb lock is (supposed to be) held. 326 */ 327 328 /* 329 * Handle socket delivery policy for any-source 330 * and source-specific multicast. [RFC3678] 331 */ 332 imo = inp->in6p_moptions; 333 if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 334 struct sockaddr_in6 mcaddr; 335 int blocked; 336 337 INP_RLOCK(inp); 338 339 bzero(&mcaddr, sizeof(struct sockaddr_in6)); 340 mcaddr.sin6_len = sizeof(struct sockaddr_in6); 341 mcaddr.sin6_family = AF_INET6; 342 mcaddr.sin6_addr = ip6->ip6_dst; 343 344 blocked = im6o_mc_filter(imo, ifp, 345 (struct sockaddr *)&mcaddr, 346 (struct sockaddr *)&fromsa); 347 if (blocked != MCAST_PASS) { 348 if (blocked == MCAST_NOTGMEMBER) 349 IP6STAT_INC(ip6s_notmember); 350 if (blocked == MCAST_NOTSMEMBER || 351 blocked == MCAST_MUTED) 352 UDPSTAT_INC(udps_filtermcast); 353 INP_RUNLOCK(inp); /* XXX */ 354 continue; 355 } 356 357 INP_RUNLOCK(inp); 358 } 359 if (last != NULL) { 360 struct mbuf *n; 361 362 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 363 INP_RLOCK(last); 364 up = intoudpcb(last); 365 if (up->u_tun_func == NULL) { 366 udp6_append(last, n, off, &fromsa); 367 } else { 368 /* 369 * Engage the tunneling 370 * protocol we will have to 371 * leave the info_lock up, 372 * since we are hunting 373 * through multiple UDP's. 374 * 375 */ 376 (*up->u_tun_func)(n, off, last); 377 } 378 INP_RUNLOCK(last); 379 } 380 } 381 last = inp; 382 /* 383 * Don't look for additional matches if this one does 384 * not have either the SO_REUSEPORT or SO_REUSEADDR 385 * socket options set. This heuristic avoids 386 * searching through all pcbs in the common case of a 387 * non-shared port. It assumes that an application 388 * will never clear these options after setting them. 389 */ 390 if ((last->inp_socket->so_options & 391 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 392 break; 393 } 394 395 if (last == NULL) { 396 /* 397 * No matching pcb found; discard datagram. (No need 398 * to send an ICMP Port Unreachable for a broadcast 399 * or multicast datgram.) 400 */ 401 UDPSTAT_INC(udps_noport); 402 UDPSTAT_INC(udps_noportmcast); 403 goto badheadlocked; 404 } 405 INP_RLOCK(last); 406 INP_INFO_RUNLOCK(pcbinfo); 407 up = intoudpcb(last); 408 UDP_PROBE(receive, NULL, last, ip6, last, uh); 409 if (up->u_tun_func == NULL) { 410 udp6_append(last, m, off, &fromsa); 411 } else { 412 /* 413 * Engage the tunneling protocol. 414 */ 415 (*up->u_tun_func)(m, off, last); 416 } 417 INP_RUNLOCK(last); 418 return (IPPROTO_DONE); 419 } 420 /* 421 * Locate pcb for datagram. 422 */ 423 424 /* 425 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. 426 */ 427 if ((m->m_flags & M_IP6_NEXTHOP) && 428 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 429 struct sockaddr_in6 *next_hop6; 430 431 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); 432 433 /* 434 * Transparently forwarded. Pretend to be the destination. 435 * Already got one like this? 436 */ 437 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 438 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 439 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); 440 if (!inp) { 441 /* 442 * It's new. Try to find the ambushing socket. 443 * Because we've rewritten the destination address, 444 * any hardware-generated hash is ignored. 445 */ 446 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, 447 uh->uh_sport, &next_hop6->sin6_addr, 448 next_hop6->sin6_port ? htons(next_hop6->sin6_port) : 449 uh->uh_dport, INPLOOKUP_WILDCARD | 450 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); 451 } 452 /* Remove the tag from the packet. We don't need it anymore. */ 453 m_tag_delete(m, fwd_tag); 454 m->m_flags &= ~M_IP6_NEXTHOP; 455 } else 456 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, 457 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, 458 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, 459 m->m_pkthdr.rcvif, m); 460 if (inp == NULL) { 461 if (udp_log_in_vain) { 462 char ip6bufs[INET6_ADDRSTRLEN]; 463 char ip6bufd[INET6_ADDRSTRLEN]; 464 465 log(LOG_INFO, 466 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 467 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 468 ntohs(uh->uh_dport), 469 ip6_sprintf(ip6bufs, &ip6->ip6_src), 470 ntohs(uh->uh_sport)); 471 } 472 UDPSTAT_INC(udps_noport); 473 if (m->m_flags & M_MCAST) { 474 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 475 UDPSTAT_INC(udps_noportmcast); 476 goto badunlocked; 477 } 478 if (V_udp_blackhole) 479 goto badunlocked; 480 if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0) 481 goto badunlocked; 482 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 483 return (IPPROTO_DONE); 484 } 485 INP_RLOCK_ASSERT(inp); 486 up = intoudpcb(inp); 487 if (cscov_partial) { 488 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { 489 INP_RUNLOCK(inp); 490 m_freem(m); 491 return (IPPROTO_DONE); 492 } 493 } 494 UDP_PROBE(receive, NULL, inp, ip6, inp, uh); 495 if (up->u_tun_func == NULL) { 496 udp6_append(inp, m, off, &fromsa); 497 } else { 498 /* 499 * Engage the tunneling protocol. 500 */ 501 502 (*up->u_tun_func)(m, off, inp); 503 } 504 INP_RUNLOCK(inp); 505 return (IPPROTO_DONE); 506 507 badheadlocked: 508 INP_INFO_RUNLOCK(pcbinfo); 509 badunlocked: 510 if (m) 511 m_freem(m); 512 return (IPPROTO_DONE); 513 } 514 515 static void 516 udp6_common_ctlinput(int cmd, struct sockaddr *sa, void *d, 517 struct inpcbinfo *pcbinfo) 518 { 519 struct udphdr uh; 520 struct ip6_hdr *ip6; 521 struct mbuf *m; 522 int off = 0; 523 struct ip6ctlparam *ip6cp = NULL; 524 const struct sockaddr_in6 *sa6_src = NULL; 525 void *cmdarg; 526 struct inpcb *(*notify)(struct inpcb *, int) = udp_notify; 527 struct udp_portonly { 528 u_int16_t uh_sport; 529 u_int16_t uh_dport; 530 } *uhp; 531 532 if (sa->sa_family != AF_INET6 || 533 sa->sa_len != sizeof(struct sockaddr_in6)) 534 return; 535 536 if ((unsigned)cmd >= PRC_NCMDS) 537 return; 538 if (PRC_IS_REDIRECT(cmd)) 539 notify = in6_rtchange, d = NULL; 540 else if (cmd == PRC_HOSTDEAD) 541 d = NULL; 542 else if (inet6ctlerrmap[cmd] == 0) 543 return; 544 545 /* if the parameter is from icmp6, decode it. */ 546 if (d != NULL) { 547 ip6cp = (struct ip6ctlparam *)d; 548 m = ip6cp->ip6c_m; 549 ip6 = ip6cp->ip6c_ip6; 550 off = ip6cp->ip6c_off; 551 cmdarg = ip6cp->ip6c_cmdarg; 552 sa6_src = ip6cp->ip6c_src; 553 } else { 554 m = NULL; 555 ip6 = NULL; 556 cmdarg = NULL; 557 sa6_src = &sa6_any; 558 } 559 560 if (ip6) { 561 /* 562 * XXX: We assume that when IPV6 is non NULL, 563 * M and OFF are valid. 564 */ 565 566 /* Check if we can safely examine src and dst ports. */ 567 if (m->m_pkthdr.len < off + sizeof(*uhp)) 568 return; 569 570 bzero(&uh, sizeof(uh)); 571 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 572 573 (void)in6_pcbnotify(pcbinfo, sa, uh.uh_dport, 574 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd, 575 cmdarg, notify); 576 } else 577 (void)in6_pcbnotify(pcbinfo, sa, 0, 578 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 579 } 580 581 void 582 udp6_ctlinput(int cmd, struct sockaddr *sa, void *d) 583 { 584 585 return (udp6_common_ctlinput(cmd, sa, d, &V_udbinfo)); 586 } 587 588 void 589 udplite6_ctlinput(int cmd, struct sockaddr *sa, void *d) 590 { 591 592 return (udp6_common_ctlinput(cmd, sa, d, &V_ulitecbinfo)); 593 } 594 595 static int 596 udp6_getcred(SYSCTL_HANDLER_ARGS) 597 { 598 struct xucred xuc; 599 struct sockaddr_in6 addrs[2]; 600 struct inpcb *inp; 601 int error; 602 603 error = priv_check(req->td, PRIV_NETINET_GETCRED); 604 if (error) 605 return (error); 606 607 if (req->newlen != sizeof(addrs)) 608 return (EINVAL); 609 if (req->oldlen != sizeof(struct xucred)) 610 return (EINVAL); 611 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 612 if (error) 613 return (error); 614 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 615 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 616 return (error); 617 } 618 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, 619 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 620 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); 621 if (inp != NULL) { 622 INP_RLOCK_ASSERT(inp); 623 if (inp->inp_socket == NULL) 624 error = ENOENT; 625 if (error == 0) 626 error = cr_canseesocket(req->td->td_ucred, 627 inp->inp_socket); 628 if (error == 0) 629 cru2x(inp->inp_cred, &xuc); 630 INP_RUNLOCK(inp); 631 } else 632 error = ENOENT; 633 if (error == 0) 634 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 635 return (error); 636 } 637 638 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0, 639 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 640 641 static int 642 udp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6, 643 struct mbuf *control, struct thread *td) 644 { 645 u_int32_t ulen = m->m_pkthdr.len; 646 u_int32_t plen = sizeof(struct udphdr) + ulen; 647 struct ip6_hdr *ip6; 648 struct udphdr *udp6; 649 struct in6_addr *laddr, *faddr, in6a; 650 struct sockaddr_in6 *sin6 = NULL; 651 struct ifnet *oifp = NULL; 652 int cscov_partial = 0; 653 int scope_ambiguous = 0; 654 u_short fport; 655 int error = 0; 656 uint8_t nxt; 657 uint16_t cscov = 0; 658 struct ip6_pktopts *optp, opt; 659 int af = AF_INET6, hlen = sizeof(struct ip6_hdr); 660 int flags; 661 struct sockaddr_in6 tmp; 662 663 INP_WLOCK_ASSERT(inp); 664 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 665 666 if (addr6) { 667 /* addr6 has been validated in udp6_send(). */ 668 sin6 = (struct sockaddr_in6 *)addr6; 669 670 /* protect *sin6 from overwrites */ 671 tmp = *sin6; 672 sin6 = &tmp; 673 674 /* 675 * Application should provide a proper zone ID or the use of 676 * default zone IDs should be enabled. Unfortunately, some 677 * applications do not behave as it should, so we need a 678 * workaround. Even if an appropriate ID is not determined, 679 * we'll see if we can determine the outgoing interface. If we 680 * can, determine the zone ID based on the interface below. 681 */ 682 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 683 scope_ambiguous = 1; 684 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 685 return (error); 686 } 687 688 if (control) { 689 if ((error = ip6_setpktopts(control, &opt, 690 inp->in6p_outputopts, td->td_ucred, IPPROTO_UDP)) != 0) 691 goto release; 692 optp = &opt; 693 } else 694 optp = inp->in6p_outputopts; 695 696 if (sin6) { 697 faddr = &sin6->sin6_addr; 698 699 /* 700 * Since we saw no essential reason for calling in_pcbconnect, 701 * we get rid of such kind of logic, and call in6_selectsrc 702 * and in6_pcbsetport in order to fill in the local address 703 * and the local port. 704 */ 705 if (sin6->sin6_port == 0) { 706 error = EADDRNOTAVAIL; 707 goto release; 708 } 709 710 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 711 /* how about ::ffff:0.0.0.0 case? */ 712 error = EISCONN; 713 goto release; 714 } 715 716 fport = sin6->sin6_port; /* allow 0 port */ 717 718 if (IN6_IS_ADDR_V4MAPPED(faddr)) { 719 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 720 /* 721 * I believe we should explicitly discard the 722 * packet when mapped addresses are disabled, 723 * rather than send the packet as an IPv6 one. 724 * If we chose the latter approach, the packet 725 * might be sent out on the wire based on the 726 * default route, the situation which we'd 727 * probably want to avoid. 728 * (20010421 jinmei@kame.net) 729 */ 730 error = EINVAL; 731 goto release; 732 } 733 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 734 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 735 /* 736 * when remote addr is an IPv4-mapped address, 737 * local addr should not be an IPv6 address, 738 * since you cannot determine how to map IPv6 739 * source address to IPv4. 740 */ 741 error = EINVAL; 742 goto release; 743 } 744 745 af = AF_INET; 746 } 747 748 if (!IN6_IS_ADDR_V4MAPPED(faddr)) { 749 error = in6_selectsrc(sin6, optp, inp, NULL, 750 td->td_ucred, &oifp, &in6a); 751 if (error) 752 goto release; 753 if (oifp && scope_ambiguous && 754 (error = in6_setscope(&sin6->sin6_addr, 755 oifp, NULL))) { 756 goto release; 757 } 758 laddr = &in6a; 759 } else 760 laddr = &inp->in6p_laddr; /* XXX */ 761 if (laddr == NULL) { 762 if (error == 0) 763 error = EADDRNOTAVAIL; 764 goto release; 765 } 766 if (inp->inp_lport == 0 && 767 (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) { 768 /* Undo an address bind that may have occurred. */ 769 inp->in6p_laddr = in6addr_any; 770 goto release; 771 } 772 } else { 773 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 774 error = ENOTCONN; 775 goto release; 776 } 777 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) { 778 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 779 /* 780 * XXX: this case would happen when the 781 * application sets the V6ONLY flag after 782 * connecting the foreign address. 783 * Such applications should be fixed, 784 * so we bark here. 785 */ 786 log(LOG_INFO, "udp6_output: IPV6_V6ONLY " 787 "option was set for a connected socket\n"); 788 error = EINVAL; 789 goto release; 790 } else 791 af = AF_INET; 792 } 793 laddr = &inp->in6p_laddr; 794 faddr = &inp->in6p_faddr; 795 fport = inp->inp_fport; 796 } 797 798 if (af == AF_INET) 799 hlen = sizeof(struct ip); 800 801 /* 802 * Calculate data length and get a mbuf 803 * for UDP and IP6 headers. 804 */ 805 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); 806 if (m == 0) { 807 error = ENOBUFS; 808 goto release; 809 } 810 811 /* 812 * Stuff checksum and output datagram. 813 */ 814 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? 815 IPPROTO_UDP : IPPROTO_UDPLITE; 816 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 817 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ 818 udp6->uh_dport = fport; 819 if (nxt == IPPROTO_UDPLITE) { 820 struct udpcb *up; 821 822 up = intoudpcb(inp); 823 cscov = up->u_txcslen; 824 if (cscov >= plen) 825 cscov = 0; 826 udp6->uh_ulen = htons(cscov); 827 /* 828 * For UDP-Lite, checksum coverage length of zero means 829 * the entire UDPLite packet is covered by the checksum. 830 */ 831 cscov_partial = (cscov == 0) ? 0 : 1; 832 } else if (plen <= 0xffff) 833 udp6->uh_ulen = htons((u_short)plen); 834 else 835 udp6->uh_ulen = 0; 836 udp6->uh_sum = 0; 837 838 switch (af) { 839 case AF_INET6: 840 ip6 = mtod(m, struct ip6_hdr *); 841 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; 842 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 843 ip6->ip6_vfc |= IPV6_VERSION; 844 ip6->ip6_plen = htons((u_short)plen); 845 ip6->ip6_nxt = nxt; 846 ip6->ip6_hlim = in6_selecthlim(inp, NULL); 847 ip6->ip6_src = *laddr; 848 ip6->ip6_dst = *faddr; 849 850 if (cscov_partial) { 851 if ((udp6->uh_sum = in6_cksum_partial(m, nxt, 852 sizeof(struct ip6_hdr), plen, cscov)) == 0) 853 udp6->uh_sum = 0xffff; 854 } else { 855 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); 856 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; 857 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 858 } 859 860 /* 861 * XXX for now assume UDP is 2-tuple. 862 * Later on this may become configurable as 4-tuple; 863 * we should support that. 864 * 865 * XXX .. and we should likely cache this in the inpcb. 866 */ 867 #ifdef RSS 868 m->m_pkthdr.flowid = rss_hash_ip6_2tuple(*faddr, *laddr); 869 m->m_flags |= M_FLOWID; 870 M_HASHTYPE_SET(m, M_HASHTYPE_RSS_IPV6); 871 #endif 872 flags = 0; 873 874 #ifdef RSS 875 /* 876 * Don't override with the inp cached flowid. 877 * 878 * Until the whole UDP path is vetted, it may actually 879 * be incorrect. 880 */ 881 flags |= IP_NODEFAULTFLOWID; 882 #endif 883 884 UDP_PROBE(send, NULL, inp, ip6, inp, udp6); 885 UDPSTAT_INC(udps_opackets); 886 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions, 887 NULL, inp); 888 break; 889 case AF_INET: 890 error = EAFNOSUPPORT; 891 goto release; 892 } 893 goto releaseopt; 894 895 release: 896 m_freem(m); 897 898 releaseopt: 899 if (control) { 900 ip6_clearpktopts(&opt, -1); 901 m_freem(control); 902 } 903 return (error); 904 } 905 906 static void 907 udp6_abort(struct socket *so) 908 { 909 struct inpcb *inp; 910 struct inpcbinfo *pcbinfo; 911 912 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 913 inp = sotoinpcb(so); 914 KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 915 916 #ifdef INET 917 if (inp->inp_vflag & INP_IPV4) { 918 struct pr_usrreqs *pru; 919 920 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 921 (*pru->pru_abort)(so); 922 return; 923 } 924 #endif 925 926 INP_WLOCK(inp); 927 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 928 INP_HASH_WLOCK(pcbinfo); 929 in6_pcbdisconnect(inp); 930 inp->in6p_laddr = in6addr_any; 931 INP_HASH_WUNLOCK(pcbinfo); 932 soisdisconnected(so); 933 } 934 INP_WUNLOCK(inp); 935 } 936 937 static int 938 udp6_attach(struct socket *so, int proto, struct thread *td) 939 { 940 struct inpcb *inp; 941 struct inpcbinfo *pcbinfo; 942 int error; 943 944 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 945 inp = sotoinpcb(so); 946 KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 947 948 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 949 error = soreserve(so, udp_sendspace, udp_recvspace); 950 if (error) 951 return (error); 952 } 953 INP_INFO_WLOCK(pcbinfo); 954 error = in_pcballoc(so, pcbinfo); 955 if (error) { 956 INP_INFO_WUNLOCK(pcbinfo); 957 return (error); 958 } 959 inp = (struct inpcb *)so->so_pcb; 960 inp->inp_vflag |= INP_IPV6; 961 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 962 inp->inp_vflag |= INP_IPV4; 963 inp->in6p_hops = -1; /* use kernel default */ 964 inp->in6p_cksum = -1; /* just to be sure */ 965 /* 966 * XXX: ugly!! 967 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 968 * because the socket may be bound to an IPv6 wildcard address, 969 * which may match an IPv4-mapped IPv6 address. 970 */ 971 inp->inp_ip_ttl = V_ip_defttl; 972 973 error = udp_newudpcb(inp); 974 if (error) { 975 in_pcbdetach(inp); 976 in_pcbfree(inp); 977 INP_INFO_WUNLOCK(pcbinfo); 978 return (error); 979 } 980 INP_WUNLOCK(inp); 981 INP_INFO_WUNLOCK(pcbinfo); 982 return (0); 983 } 984 985 static int 986 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 987 { 988 struct inpcb *inp; 989 struct inpcbinfo *pcbinfo; 990 int error; 991 992 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 993 inp = sotoinpcb(so); 994 KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 995 996 INP_WLOCK(inp); 997 INP_HASH_WLOCK(pcbinfo); 998 inp->inp_vflag &= ~INP_IPV4; 999 inp->inp_vflag |= INP_IPV6; 1000 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1001 struct sockaddr_in6 *sin6_p; 1002 1003 sin6_p = (struct sockaddr_in6 *)nam; 1004 1005 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 1006 inp->inp_vflag |= INP_IPV4; 1007 #ifdef INET 1008 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 1009 struct sockaddr_in sin; 1010 1011 in6_sin6_2_sin(&sin, sin6_p); 1012 inp->inp_vflag |= INP_IPV4; 1013 inp->inp_vflag &= ~INP_IPV6; 1014 error = in_pcbbind(inp, (struct sockaddr *)&sin, 1015 td->td_ucred); 1016 goto out; 1017 } 1018 #endif 1019 } 1020 1021 error = in6_pcbbind(inp, nam, td->td_ucred); 1022 #ifdef INET 1023 out: 1024 #endif 1025 INP_HASH_WUNLOCK(pcbinfo); 1026 INP_WUNLOCK(inp); 1027 return (error); 1028 } 1029 1030 static void 1031 udp6_close(struct socket *so) 1032 { 1033 struct inpcb *inp; 1034 struct inpcbinfo *pcbinfo; 1035 1036 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 1037 inp = sotoinpcb(so); 1038 KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 1039 1040 #ifdef INET 1041 if (inp->inp_vflag & INP_IPV4) { 1042 struct pr_usrreqs *pru; 1043 1044 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 1045 (*pru->pru_disconnect)(so); 1046 return; 1047 } 1048 #endif 1049 INP_WLOCK(inp); 1050 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1051 INP_HASH_WLOCK(pcbinfo); 1052 in6_pcbdisconnect(inp); 1053 inp->in6p_laddr = in6addr_any; 1054 INP_HASH_WUNLOCK(pcbinfo); 1055 soisdisconnected(so); 1056 } 1057 INP_WUNLOCK(inp); 1058 } 1059 1060 static int 1061 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 1062 { 1063 struct inpcb *inp; 1064 struct inpcbinfo *pcbinfo; 1065 struct sockaddr_in6 *sin6; 1066 int error; 1067 1068 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 1069 inp = sotoinpcb(so); 1070 sin6 = (struct sockaddr_in6 *)nam; 1071 KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 1072 1073 /* 1074 * XXXRW: Need to clarify locking of v4/v6 flags. 1075 */ 1076 INP_WLOCK(inp); 1077 #ifdef INET 1078 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1079 struct sockaddr_in sin; 1080 1081 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1082 error = EINVAL; 1083 goto out; 1084 } 1085 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1086 error = EISCONN; 1087 goto out; 1088 } 1089 in6_sin6_2_sin(&sin, sin6); 1090 inp->inp_vflag |= INP_IPV4; 1091 inp->inp_vflag &= ~INP_IPV6; 1092 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); 1093 if (error != 0) 1094 goto out; 1095 INP_HASH_WLOCK(pcbinfo); 1096 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 1097 td->td_ucred); 1098 INP_HASH_WUNLOCK(pcbinfo); 1099 if (error == 0) 1100 soisconnected(so); 1101 goto out; 1102 } 1103 #endif 1104 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1105 error = EISCONN; 1106 goto out; 1107 } 1108 inp->inp_vflag &= ~INP_IPV4; 1109 inp->inp_vflag |= INP_IPV6; 1110 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); 1111 if (error != 0) 1112 goto out; 1113 INP_HASH_WLOCK(pcbinfo); 1114 error = in6_pcbconnect(inp, nam, td->td_ucred); 1115 INP_HASH_WUNLOCK(pcbinfo); 1116 if (error == 0) 1117 soisconnected(so); 1118 out: 1119 INP_WUNLOCK(inp); 1120 return (error); 1121 } 1122 1123 static void 1124 udp6_detach(struct socket *so) 1125 { 1126 struct inpcb *inp; 1127 struct inpcbinfo *pcbinfo; 1128 struct udpcb *up; 1129 1130 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 1131 inp = sotoinpcb(so); 1132 KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 1133 1134 INP_INFO_WLOCK(pcbinfo); 1135 INP_WLOCK(inp); 1136 up = intoudpcb(inp); 1137 KASSERT(up != NULL, ("%s: up == NULL", __func__)); 1138 in_pcbdetach(inp); 1139 in_pcbfree(inp); 1140 INP_INFO_WUNLOCK(pcbinfo); 1141 udp_discardcb(up); 1142 } 1143 1144 static int 1145 udp6_disconnect(struct socket *so) 1146 { 1147 struct inpcb *inp; 1148 struct inpcbinfo *pcbinfo; 1149 int error; 1150 1151 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 1152 inp = sotoinpcb(so); 1153 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 1154 1155 #ifdef INET 1156 if (inp->inp_vflag & INP_IPV4) { 1157 struct pr_usrreqs *pru; 1158 1159 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 1160 (void)(*pru->pru_disconnect)(so); 1161 return (0); 1162 } 1163 #endif 1164 1165 INP_WLOCK(inp); 1166 1167 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 1168 error = ENOTCONN; 1169 goto out; 1170 } 1171 1172 INP_HASH_WLOCK(pcbinfo); 1173 in6_pcbdisconnect(inp); 1174 inp->in6p_laddr = in6addr_any; 1175 INP_HASH_WUNLOCK(pcbinfo); 1176 SOCK_LOCK(so); 1177 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1178 SOCK_UNLOCK(so); 1179 out: 1180 INP_WUNLOCK(inp); 1181 return (0); 1182 } 1183 1184 static int 1185 udp6_send(struct socket *so, int flags, struct mbuf *m, 1186 struct sockaddr *addr, struct mbuf *control, struct thread *td) 1187 { 1188 struct inpcb *inp; 1189 struct inpcbinfo *pcbinfo; 1190 int error = 0; 1191 1192 pcbinfo = get_inpcbinfo(so->so_proto->pr_protocol); 1193 inp = sotoinpcb(so); 1194 KASSERT(inp != NULL, ("udp6_send: inp == NULL")); 1195 1196 INP_WLOCK(inp); 1197 if (addr) { 1198 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 1199 error = EINVAL; 1200 goto bad; 1201 } 1202 if (addr->sa_family != AF_INET6) { 1203 error = EAFNOSUPPORT; 1204 goto bad; 1205 } 1206 } 1207 1208 #ifdef INET 1209 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 1210 int hasv4addr; 1211 struct sockaddr_in6 *sin6 = 0; 1212 1213 if (addr == 0) 1214 hasv4addr = (inp->inp_vflag & INP_IPV4); 1215 else { 1216 sin6 = (struct sockaddr_in6 *)addr; 1217 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 1218 ? 1 : 0; 1219 } 1220 if (hasv4addr) { 1221 struct pr_usrreqs *pru; 1222 1223 /* 1224 * XXXRW: We release UDP-layer locks before calling 1225 * udp_send() in order to avoid recursion. However, 1226 * this does mean there is a short window where inp's 1227 * fields are unstable. Could this lead to a 1228 * potential race in which the factors causing us to 1229 * select the UDPv4 output routine are invalidated? 1230 */ 1231 INP_WUNLOCK(inp); 1232 if (sin6) 1233 in6_sin6_2_sin_in_sock(addr); 1234 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 1235 /* addr will just be freed in sendit(). */ 1236 return ((*pru->pru_send)(so, flags, m, addr, control, 1237 td)); 1238 } 1239 } 1240 #endif 1241 #ifdef MAC 1242 mac_inpcb_create_mbuf(inp, m); 1243 #endif 1244 INP_HASH_WLOCK(pcbinfo); 1245 error = udp6_output(inp, m, addr, control, td); 1246 INP_HASH_WUNLOCK(pcbinfo); 1247 #ifdef INET 1248 #endif 1249 INP_WUNLOCK(inp); 1250 return (error); 1251 1252 bad: 1253 INP_WUNLOCK(inp); 1254 m_freem(m); 1255 return (error); 1256 } 1257 1258 struct pr_usrreqs udp6_usrreqs = { 1259 .pru_abort = udp6_abort, 1260 .pru_attach = udp6_attach, 1261 .pru_bind = udp6_bind, 1262 .pru_connect = udp6_connect, 1263 .pru_control = in6_control, 1264 .pru_detach = udp6_detach, 1265 .pru_disconnect = udp6_disconnect, 1266 .pru_peeraddr = in6_mapped_peeraddr, 1267 .pru_send = udp6_send, 1268 .pru_shutdown = udp_shutdown, 1269 .pru_sockaddr = in6_mapped_sockaddr, 1270 .pru_soreceive = soreceive_dgram, 1271 .pru_sosend = sosend_dgram, 1272 .pru_sosetlabel = in_pcbsosetlabel, 1273 .pru_close = udp6_close 1274 }; 1275