udp6_usrreq.c revision 121901
1/* $FreeBSD: head/sys/netinet6/udp6_usrreq.c 121901 2003-11-02 19:09:29Z ume $ */ 2/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ 3 4/* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33/* 34 * Copyright (c) 1982, 1986, 1989, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 66 */ 67 68#include "opt_inet.h" 69#include "opt_inet6.h" 70#include "opt_ipsec.h" 71 72#include <sys/param.h> 73#include <sys/errno.h> 74#include <sys/kernel.h> 75#include <sys/lock.h> 76#include <sys/mbuf.h> 77#include <sys/proc.h> 78#include <sys/protosw.h> 79#include <sys/signalvar.h> 80#include <sys/socket.h> 81#include <sys/socketvar.h> 82#include <sys/stat.h> 83#include <sys/sx.h> 84#include <sys/sysctl.h> 85#include <sys/syslog.h> 86#include <sys/systm.h> 87 88#include <net/if.h> 89#include <net/if_types.h> 90#include <net/route.h> 91 92#include <netinet/in.h> 93#include <netinet/in_pcb.h> 94#include <netinet/in_systm.h> 95#include <netinet/in_var.h> 96#include <netinet/ip.h> 97#include <netinet/ip6.h> 98#include <netinet/icmp6.h> 99#include <netinet/ip_var.h> 100#include <netinet/udp.h> 101#include <netinet/udp_var.h> 102#include <netinet6/ip6protosw.h> 103#include <netinet6/ip6_var.h> 104#include <netinet6/in6_pcb.h> 105#include <netinet6/udp6_var.h> 106 107#ifdef IPSEC 108#include <netinet6/ipsec.h> 109#include <netinet6/ipsec6.h> 110#endif /* IPSEC */ 111 112#ifdef FAST_IPSEC 113#include <netipsec/ipsec.h> 114#include <netipsec/ipsec6.h> 115#endif /* FAST_IPSEC */ 116 117/* 118 * UDP protocol inplementation. 119 * Per RFC 768, August, 1980. 120 */ 121 122extern struct protosw inetsw[]; 123static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 124static int udp6_detach __P((struct socket *so)); 125 126static int 127in6_mcmatch(in6p, ia6, ifp) 128 struct inpcb *in6p; 129 register struct in6_addr *ia6; 130 struct ifnet *ifp; 131{ 132 struct ip6_moptions *im6o = in6p->in6p_moptions; 133 struct in6_multi_mship *imm; 134 135 if (im6o == NULL) 136 return 0; 137 138 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 139 imm = imm->i6mm_chain.le_next) { 140 if ((ifp == NULL || 141 imm->i6mm_maddr->in6m_ifp == ifp) && 142 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 143 ia6)) 144 return 1; 145 } 146 return 0; 147} 148 149int 150udp6_input(mp, offp, proto) 151 struct mbuf **mp; 152 int *offp, proto; 153{ 154 struct mbuf *m = *mp; 155 register struct ip6_hdr *ip6; 156 register struct udphdr *uh; 157 register struct inpcb *in6p; 158 struct mbuf *opts = NULL; 159 int off = *offp; 160 int plen, ulen; 161 struct sockaddr_in6 fromsa; 162 163 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 164 165 ip6 = mtod(m, struct ip6_hdr *); 166 167 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 168 /* XXX send icmp6 host/port unreach? */ 169 m_freem(m); 170 return IPPROTO_DONE; 171 } 172 173 udpstat.udps_ipackets++; 174 175 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 176 uh = (struct udphdr *)((caddr_t)ip6 + off); 177 ulen = ntohs((u_short)uh->uh_ulen); 178 179 if (plen != ulen) { 180 udpstat.udps_badlen++; 181 goto bad; 182 } 183 184 /* 185 * Checksum extended UDP header and data. 186 */ 187 if (uh->uh_sum == 0) 188 udpstat.udps_nosum++; 189 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 190 udpstat.udps_badsum++; 191 goto bad; 192 } 193 194 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 195 struct inpcb *last; 196 197 /* 198 * Deliver a multicast datagram to all sockets 199 * for which the local and remote addresses and ports match 200 * those of the incoming datagram. This allows more than 201 * one process to receive multicasts on the same port. 202 * (This really ought to be done for unicast datagrams as 203 * well, but that would cause problems with existing 204 * applications that open both address-specific sockets and 205 * a wildcard socket listening to the same port -- they would 206 * end up receiving duplicates of every unicast datagram. 207 * Those applications open the multiple sockets to overcome an 208 * inadequacy of the UDP socket interface, but for backwards 209 * compatibility we avoid the problem here rather than 210 * fixing the interface. Maybe 4.5BSD will remedy this?) 211 */ 212 213 /* 214 * In a case that laddr should be set to the link-local 215 * address (this happens in RIPng), the multicast address 216 * specified in the received packet does not match with 217 * laddr. To cure this situation, the matching is relaxed 218 * if the receiving interface is the same as one specified 219 * in the socket and if the destination multicast address 220 * matches one of the multicast groups specified in the socket. 221 */ 222 223 /* 224 * Construct sockaddr format source address. 225 */ 226 init_sin6(&fromsa, m); /* general init */ 227 fromsa.sin6_port = uh->uh_sport; 228 /* 229 * KAME note: traditionally we dropped udpiphdr from mbuf here. 230 * We need udphdr for IPsec processing so we do that later. 231 */ 232 233 /* 234 * Locate pcb(s) for datagram. 235 * (Algorithm copied from raw_intr().) 236 */ 237 last = NULL; 238 LIST_FOREACH(in6p, &udb, inp_list) { 239 if ((in6p->inp_vflag & INP_IPV6) == 0) 240 continue; 241 if (in6p->in6p_lport != uh->uh_dport) 242 continue; 243 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 244 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 245 &ip6->ip6_dst) && 246 !in6_mcmatch(in6p, &ip6->ip6_dst, 247 m->m_pkthdr.rcvif)) 248 continue; 249 } 250 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 251 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 252 &ip6->ip6_src) || 253 in6p->in6p_fport != uh->uh_sport) 254 continue; 255 } 256 257 if (last != NULL) { 258 struct mbuf *n; 259 260#ifdef IPSEC 261 /* 262 * Check AH/ESP integrity. 263 */ 264 if (ipsec6_in_reject(m, last)) 265 ipsec6stat.in_polvio++; 266 /* do not inject data into pcb */ 267 else 268#endif /* IPSEC */ 269#ifdef FAST_IPSEC 270 /* 271 * Check AH/ESP integrity. 272 */ 273 if (ipsec6_in_reject(m, last)) 274 ; 275 else 276#endif /* FAST_IPSEC */ 277 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 278 /* 279 * KAME NOTE: do not 280 * m_copy(m, offset, ...) above. 281 * sbappendaddr() expects M_PKTHDR, 282 * and m_copy() will copy M_PKTHDR 283 * only if offset is 0. 284 */ 285 if (last->in6p_flags & IN6P_CONTROLOPTS 286 || last->in6p_socket->so_options & SO_TIMESTAMP) 287 ip6_savecontrol(last, n, &opts); 288 289 m_adj(n, off + sizeof(struct udphdr)); 290 if (sbappendaddr(&last->in6p_socket->so_rcv, 291 (struct sockaddr *)&fromsa, 292 n, opts) == 0) { 293 m_freem(n); 294 if (opts) 295 m_freem(opts); 296 udpstat.udps_fullsock++; 297 } else 298 sorwakeup(last->in6p_socket); 299 opts = NULL; 300 } 301 } 302 last = in6p; 303 /* 304 * Don't look for additional matches if this one does 305 * not have either the SO_REUSEPORT or SO_REUSEADDR 306 * socket options set. This heuristic avoids searching 307 * through all pcbs in the common case of a non-shared 308 * port. It assumes that an application will never 309 * clear these options after setting them. 310 */ 311 if ((last->in6p_socket->so_options & 312 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 313 break; 314 } 315 316 if (last == NULL) { 317 /* 318 * No matching pcb found; discard datagram. 319 * (No need to send an ICMP Port Unreachable 320 * for a broadcast or multicast datgram.) 321 */ 322 udpstat.udps_noport++; 323 udpstat.udps_noportmcast++; 324 goto bad; 325 } 326#ifdef IPSEC 327 /* 328 * Check AH/ESP integrity. 329 */ 330 if (ipsec6_in_reject(m, last)) { 331 ipsec6stat.in_polvio++; 332 goto bad; 333 } 334#endif /* IPSEC */ 335#ifdef FAST_IPSEC 336 /* 337 * Check AH/ESP integrity. 338 */ 339 if (ipsec6_in_reject(m, last)) { 340 goto bad; 341 } 342#endif /* FAST_IPSEC */ 343 if (last->in6p_flags & IN6P_CONTROLOPTS 344 || last->in6p_socket->so_options & SO_TIMESTAMP) 345 ip6_savecontrol(last, m, &opts); 346 347 m_adj(m, off + sizeof(struct udphdr)); 348 if (sbappendaddr(&last->in6p_socket->so_rcv, 349 (struct sockaddr *)&fromsa, 350 m, opts) == 0) { 351 udpstat.udps_fullsock++; 352 goto bad; 353 } 354 sorwakeup(last->in6p_socket); 355 return IPPROTO_DONE; 356 } 357 /* 358 * Locate pcb for datagram. 359 */ 360 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 361 &ip6->ip6_dst, uh->uh_dport, 1, 362 m->m_pkthdr.rcvif); 363 if (in6p == 0) { 364 if (log_in_vain) { 365 char buf[INET6_ADDRSTRLEN]; 366 367 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 368 log(LOG_INFO, 369 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 370 buf, ntohs(uh->uh_dport), 371 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 372 } 373 udpstat.udps_noport++; 374 if (m->m_flags & M_MCAST) { 375 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 376 udpstat.udps_noportmcast++; 377 goto bad; 378 } 379 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 380 return IPPROTO_DONE; 381 } 382#ifdef IPSEC 383 /* 384 * Check AH/ESP integrity. 385 */ 386 if (ipsec6_in_reject(m, in6p)) { 387 ipsec6stat.in_polvio++; 388 goto bad; 389 } 390#endif /* IPSEC */ 391#ifdef FAST_IPSEC 392 /* 393 * Check AH/ESP integrity. 394 */ 395 if (ipsec6_in_reject(m, in6p)) { 396 goto bad; 397 } 398#endif /* FAST_IPSEC */ 399 400 /* 401 * Construct sockaddr format source address. 402 * Stuff source address and datagram in user buffer. 403 */ 404 init_sin6(&fromsa, m); /* general init */ 405 fromsa.sin6_port = uh->uh_sport; 406 if (in6p->in6p_flags & IN6P_CONTROLOPTS 407 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 408 ip6_savecontrol(in6p, m, &opts); 409 m_adj(m, off + sizeof(struct udphdr)); 410 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 411 (struct sockaddr *)&fromsa, 412 m, opts) == 0) { 413 udpstat.udps_fullsock++; 414 goto bad; 415 } 416 sorwakeup(in6p->in6p_socket); 417 return IPPROTO_DONE; 418bad: 419 if (m) 420 m_freem(m); 421 if (opts) 422 m_freem(opts); 423 return IPPROTO_DONE; 424} 425 426void 427udp6_ctlinput(cmd, sa, d) 428 int cmd; 429 struct sockaddr *sa; 430 void *d; 431{ 432 struct udphdr uh; 433 struct ip6_hdr *ip6; 434 struct mbuf *m; 435 int off = 0; 436 struct ip6ctlparam *ip6cp = NULL; 437 const struct sockaddr_in6 *sa6_src = NULL; 438 struct inpcb *(*notify) __P((struct inpcb *, int)) = udp_notify; 439 struct udp_portonly { 440 u_int16_t uh_sport; 441 u_int16_t uh_dport; 442 } *uhp; 443 444 if (sa->sa_family != AF_INET6 || 445 sa->sa_len != sizeof(struct sockaddr_in6)) 446 return; 447 448 if ((unsigned)cmd >= PRC_NCMDS) 449 return; 450 if (PRC_IS_REDIRECT(cmd)) 451 notify = in6_rtchange, d = NULL; 452 else if (cmd == PRC_HOSTDEAD) 453 d = NULL; 454 else if (inet6ctlerrmap[cmd] == 0) 455 return; 456 457 /* if the parameter is from icmp6, decode it. */ 458 if (d != NULL) { 459 ip6cp = (struct ip6ctlparam *)d; 460 m = ip6cp->ip6c_m; 461 ip6 = ip6cp->ip6c_ip6; 462 off = ip6cp->ip6c_off; 463 sa6_src = ip6cp->ip6c_src; 464 } else { 465 m = NULL; 466 ip6 = NULL; 467 sa6_src = &sa6_any; 468 } 469 470 if (ip6) { 471 /* 472 * XXX: We assume that when IPV6 is non NULL, 473 * M and OFF are valid. 474 */ 475 476 /* check if we can safely examine src and dst ports */ 477 if (m->m_pkthdr.len < off + sizeof(*uhp)) 478 return; 479 480 bzero(&uh, sizeof(uh)); 481 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 482 483 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 484 (struct sockaddr *)ip6cp->ip6c_src, 485 uh.uh_sport, cmd, notify); 486 } else 487 (void) in6_pcbnotify(&udb, sa, 0, 488 (const struct sockaddr *)sa6_src, 489 0, cmd, notify); 490} 491 492static int 493udp6_getcred(SYSCTL_HANDLER_ARGS) 494{ 495 struct xucred xuc; 496 struct sockaddr_in6 addrs[2]; 497 struct inpcb *inp; 498 int error, s; 499 500 error = suser(req->td); 501 if (error) 502 return (error); 503 504 if (req->newlen != sizeof(addrs)) 505 return (EINVAL); 506 if (req->oldlen != sizeof(struct xucred)) 507 return (EINVAL); 508 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 509 if (error) 510 return (error); 511 s = splnet(); 512 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 513 addrs[1].sin6_port, 514 &addrs[0].sin6_addr, addrs[0].sin6_port, 515 1, NULL); 516 if (!inp || !inp->inp_socket) { 517 error = ENOENT; 518 goto out; 519 } 520 cru2x(inp->inp_socket->so_cred, &xuc); 521 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 522out: 523 splx(s); 524 return (error); 525} 526 527SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 528 0, 0, 529 udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 530 531static int 532udp6_abort(struct socket *so) 533{ 534 struct inpcb *inp; 535 int s; 536 537 inp = sotoinpcb(so); 538 if (inp == 0) 539 return EINVAL; /* ??? possible? panic instead? */ 540 soisdisconnected(so); 541 s = splnet(); 542 in6_pcbdetach(inp); 543 splx(s); 544 return 0; 545} 546 547static int 548udp6_attach(struct socket *so, int proto, struct thread *td) 549{ 550 struct inpcb *inp; 551 int s, error; 552 553 inp = sotoinpcb(so); 554 if (inp != 0) 555 return EINVAL; 556 557 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 558 error = soreserve(so, udp_sendspace, udp_recvspace); 559 if (error) 560 return error; 561 } 562 s = splnet(); 563 error = in_pcballoc(so, &udbinfo, td); 564 splx(s); 565 if (error) 566 return error; 567 inp = (struct inpcb *)so->so_pcb; 568 inp->inp_vflag |= INP_IPV6; 569 if (!ip6_v6only) 570 inp->inp_vflag |= INP_IPV4; 571 inp->in6p_hops = -1; /* use kernel default */ 572 inp->in6p_cksum = -1; /* just to be sure */ 573 /* 574 * XXX: ugly!! 575 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 576 * because the socket may be bound to an IPv6 wildcard address, 577 * which may match an IPv4-mapped IPv6 address. 578 */ 579 inp->inp_ip_ttl = ip_defttl; 580 return 0; 581} 582 583static int 584udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 585{ 586 struct inpcb *inp; 587 int s, error; 588 589 inp = sotoinpcb(so); 590 if (inp == 0) 591 return EINVAL; 592 593 inp->inp_vflag &= ~INP_IPV4; 594 inp->inp_vflag |= INP_IPV6; 595 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 596 struct sockaddr_in6 *sin6_p; 597 598 sin6_p = (struct sockaddr_in6 *)nam; 599 600 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 601 inp->inp_vflag |= INP_IPV4; 602 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 603 struct sockaddr_in sin; 604 605 in6_sin6_2_sin(&sin, sin6_p); 606 inp->inp_vflag |= INP_IPV4; 607 inp->inp_vflag &= ~INP_IPV6; 608 s = splnet(); 609 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 610 splx(s); 611 return error; 612 } 613 } 614 615 s = splnet(); 616 error = in6_pcbbind(inp, nam, td); 617 splx(s); 618 return error; 619} 620 621static int 622udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 623{ 624 struct inpcb *inp; 625 int s, error; 626 627 inp = sotoinpcb(so); 628 if (inp == 0) 629 return EINVAL; 630 631 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 632 struct sockaddr_in6 *sin6_p; 633 634 sin6_p = (struct sockaddr_in6 *)nam; 635 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 636 struct sockaddr_in sin; 637 638 if (inp->inp_faddr.s_addr != INADDR_ANY) 639 return EISCONN; 640 in6_sin6_2_sin(&sin, sin6_p); 641 s = splnet(); 642 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 643 splx(s); 644 if (error == 0) { 645 inp->inp_vflag |= INP_IPV4; 646 inp->inp_vflag &= ~INP_IPV6; 647 soisconnected(so); 648 } 649 return error; 650 } 651 } 652 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 653 return EISCONN; 654 s = splnet(); 655 error = in6_pcbconnect(inp, nam, td); 656 splx(s); 657 if (error == 0) { 658 if (!ip6_v6only) { /* should be non mapped addr */ 659 inp->inp_vflag &= ~INP_IPV4; 660 inp->inp_vflag |= INP_IPV6; 661 } 662 soisconnected(so); 663 } 664 return error; 665} 666 667static int 668udp6_detach(struct socket *so) 669{ 670 struct inpcb *inp; 671 int s; 672 673 inp = sotoinpcb(so); 674 if (inp == 0) 675 return EINVAL; 676 s = splnet(); 677 in6_pcbdetach(inp); 678 splx(s); 679 return 0; 680} 681 682static int 683udp6_disconnect(struct socket *so) 684{ 685 struct inpcb *inp; 686 int s; 687 688 inp = sotoinpcb(so); 689 if (inp == 0) 690 return EINVAL; 691 692 if (inp->inp_vflag & INP_IPV4) { 693 struct pr_usrreqs *pru; 694 695 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 696 return ((*pru->pru_disconnect)(so)); 697 } 698 699 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 700 return ENOTCONN; 701 702 s = splnet(); 703 in6_pcbdisconnect(inp); 704 inp->in6p_laddr = in6addr_any; 705 splx(s); 706 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 707 return 0; 708} 709 710static int 711udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 712 struct mbuf *control, struct thread *td) 713{ 714 struct inpcb *inp; 715 int error = 0; 716 717 inp = sotoinpcb(so); 718 if (inp == 0) { 719 error = EINVAL; 720 goto bad; 721 } 722 723 if (addr) { 724 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 725 error = EINVAL; 726 goto bad; 727 } 728 if (addr->sa_family != AF_INET6) { 729 error = EAFNOSUPPORT; 730 goto bad; 731 } 732 } 733 734 if (!ip6_v6only) { 735 int hasv4addr; 736 struct sockaddr_in6 *sin6 = 0; 737 738 if (addr == 0) 739 hasv4addr = (inp->inp_vflag & INP_IPV4); 740 else { 741 sin6 = (struct sockaddr_in6 *)addr; 742 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 743 ? 1 : 0; 744 } 745 if (hasv4addr) { 746 struct pr_usrreqs *pru; 747 748 if (sin6) 749 in6_sin6_2_sin_in_sock(addr); 750 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 751 error = ((*pru->pru_send)(so, flags, m, addr, control, 752 td)); 753 /* addr will just be freed in sendit(). */ 754 return error; 755 } 756 } 757 758 return udp6_output(inp, m, addr, control, td); 759 760 bad: 761 m_freem(m); 762 return (error); 763} 764 765struct pr_usrreqs udp6_usrreqs = { 766 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 767 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 768 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 769 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 770 in6_mapped_sockaddr, sosend, soreceive, sopoll 771}; 772