1 /* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/udp6_usrreq.c,v 1.9 2003/08/23 11:02:46 rob Exp $ */ 3 /* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1982, 1986, 1989, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 67 */ 68 69 #include "opt_inet.h" 70 #include "opt_inet6.h" 71 #include "opt_ipsec.h" 72 73 #include <sys/param.h> 74 #include <sys/kernel.h> 75 #include <sys/mbuf.h> 76 #include <sys/protosw.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/sysctl.h> 80 #include <sys/errno.h> 81 #include <sys/stat.h> 82 #include <sys/systm.h> 83 #include <sys/syslog.h> 84 #include <sys/proc.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 #include <net/if_types.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/in_var.h> 95 #include <netinet/ip_var.h> 96 #include <netinet/udp.h> 97 #include <netinet/udp_var.h> 98 #include <netinet/ip6.h> 99 #include <netinet6/ip6_var.h> 100 #include <netinet6/in6_pcb.h> 101 #include <netinet/icmp6.h> 102 #include <netinet6/udp6_var.h> 103 #include <netinet6/ip6protosw.h> 104 105 #ifdef IPSEC 106 #include <netinet6/ipsec.h> 107 #include <netinet6/ipsec6.h> 108 #endif /* IPSEC */ 109 110 #ifdef FAST_IPSEC 111 #include "ipsec.h" 112 #include "ipsec6.h" 113 #endif /* FAST_IPSEC */ 114 115 /* 116 * UDP protocol inplementation. 117 * Per RFC 768, August, 1980. 118 */ 119 120 extern struct protosw inetsw[]; 121 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 122 static int udp6_detach (struct socket *so); 123 124 static int 125 in6_mcmatch(in6p, ia6, ifp) 126 struct inpcb *in6p; 127 struct in6_addr *ia6; 128 struct ifnet *ifp; 129 { 130 struct ip6_moptions *im6o = in6p->in6p_moptions; 131 struct in6_multi_mship *imm; 132 133 if (im6o == NULL) 134 return 0; 135 136 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 137 imm = imm->i6mm_chain.le_next) { 138 if ((ifp == NULL || 139 imm->i6mm_maddr->in6m_ifp == ifp) && 140 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 141 ia6)) 142 return 1; 143 } 144 return 0; 145 } 146 147 int 148 udp6_input(struct mbuf **mp, int *offp, int proto) 149 { 150 struct mbuf *m = *mp; 151 struct ip6_hdr *ip6; 152 struct udphdr *uh; 153 struct inpcb *in6p; 154 struct mbuf *opts = NULL; 155 int off = *offp; 156 int plen, ulen; 157 struct sockaddr_in6 udp_in6; 158 159 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 160 161 ip6 = mtod(m, struct ip6_hdr *); 162 163 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 164 /* XXX send icmp6 host/port unreach? */ 165 m_freem(m); 166 return IPPROTO_DONE; 167 } 168 169 udpstat.udps_ipackets++; 170 171 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 172 uh = (struct udphdr *)((caddr_t)ip6 + off); 173 ulen = ntohs((u_short)uh->uh_ulen); 174 175 if (plen != ulen) { 176 udpstat.udps_badlen++; 177 goto bad; 178 } 179 180 /* 181 * Checksum extended UDP header and data. 182 */ 183 if (uh->uh_sum == 0) 184 udpstat.udps_nosum++; 185 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 186 udpstat.udps_badsum++; 187 goto bad; 188 } 189 190 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 191 struct inpcb *last; 192 193 /* 194 * Deliver a multicast datagram to all sockets 195 * for which the local and remote addresses and ports match 196 * those of the incoming datagram. This allows more than 197 * one process to receive multicasts on the same port. 198 * (This really ought to be done for unicast datagrams as 199 * well, but that would cause problems with existing 200 * applications that open both address-specific sockets and 201 * a wildcard socket listening to the same port -- they would 202 * end up receiving duplicates of every unicast datagram. 203 * Those applications open the multiple sockets to overcome an 204 * inadequacy of the UDP socket interface, but for backwards 205 * compatibility we avoid the problem here rather than 206 * fixing the interface. Maybe 4.5BSD will remedy this?) 207 */ 208 209 /* 210 * In a case that laddr should be set to the link-local 211 * address (this happens in RIPng), the multicast address 212 * specified in the received packet does not match with 213 * laddr. To cure this situation, the matching is relaxed 214 * if the receiving interface is the same as one specified 215 * in the socket and if the destination multicast address 216 * matches one of the multicast groups specified in the socket. 217 */ 218 219 /* 220 * Construct sockaddr format source address. 221 */ 222 init_sin6(&udp_in6, m); /* general init */ 223 udp_in6.sin6_port = uh->uh_sport; 224 /* 225 * KAME note: traditionally we dropped udpiphdr from mbuf here. 226 * We need udphdr for IPsec processing so we do that later. 227 */ 228 229 /* 230 * Locate pcb(s) for datagram. 231 * (Algorithm copied from raw_intr().) 232 */ 233 last = NULL; 234 LIST_FOREACH(in6p, &udb, inp_list) { 235 if ((in6p->inp_vflag & INP_IPV6) == 0) 236 continue; 237 if (in6p->in6p_lport != uh->uh_dport) 238 continue; 239 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 240 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 241 &ip6->ip6_dst) && 242 !in6_mcmatch(in6p, &ip6->ip6_dst, 243 m->m_pkthdr.rcvif)) 244 continue; 245 } 246 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 247 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 248 &ip6->ip6_src) || 249 in6p->in6p_fport != uh->uh_sport) 250 continue; 251 } 252 253 if (last != NULL) { 254 struct mbuf *n; 255 256 #ifdef IPSEC 257 /* 258 * Check AH/ESP integrity. 259 */ 260 if (ipsec6_in_reject_so(m, last->inp_socket)) 261 ipsec6stat.in_polvio++; 262 /* do not inject data into pcb */ 263 else 264 #endif /* IPSEC */ 265 #ifdef FAST_IPSEC 266 /* 267 * Check AH/ESP integrity. 268 */ 269 if (ipsec6_in_reject(m, last)) 270 ; 271 else 272 #endif /* FAST_IPSEC */ 273 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 274 /* 275 * KAME NOTE: do not 276 * m_copy(m, offset, ...) above. 277 * sbappendaddr() expects M_PKTHDR, 278 * and m_copy() will copy M_PKTHDR 279 * only if offset is 0. 280 */ 281 if (last->in6p_flags & IN6P_CONTROLOPTS 282 || last->in6p_socket->so_options & SO_TIMESTAMP) 283 ip6_savecontrol(last, &opts, 284 ip6, n); 285 286 m_adj(n, off + sizeof(struct udphdr)); 287 if (sbappendaddr(&last->in6p_socket->so_rcv, 288 (struct sockaddr *)&udp_in6, 289 n, opts) == 0) { 290 m_freem(n); 291 if (opts) 292 m_freem(opts); 293 udpstat.udps_fullsock++; 294 } else 295 sorwakeup(last->in6p_socket); 296 opts = NULL; 297 } 298 } 299 last = in6p; 300 /* 301 * Don't look for additional matches if this one does 302 * not have either the SO_REUSEPORT or SO_REUSEADDR 303 * socket options set. This heuristic avoids searching 304 * through all pcbs in the common case of a non-shared 305 * port. It assumes that an application will never 306 * clear these options after setting them. 307 */ 308 if ((last->in6p_socket->so_options & 309 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 310 break; 311 } 312 313 if (last == NULL) { 314 /* 315 * No matching pcb found; discard datagram. 316 * (No need to send an ICMP Port Unreachable 317 * for a broadcast or multicast datgram.) 318 */ 319 udpstat.udps_noport++; 320 udpstat.udps_noportmcast++; 321 goto bad; 322 } 323 #ifdef IPSEC 324 /* 325 * Check AH/ESP integrity. 326 */ 327 if (ipsec6_in_reject_so(m, last->inp_socket)) { 328 ipsec6stat.in_polvio++; 329 goto bad; 330 } 331 #endif /* IPSEC */ 332 #ifdef FAST_IPSEC 333 /* 334 * Check AH/ESP integrity. 335 */ 336 if (ipsec6_in_reject(m, last)) { 337 goto bad; 338 } 339 #endif /* FAST_IPSEC */ 340 if (last->in6p_flags & IN6P_CONTROLOPTS 341 || last->in6p_socket->so_options & SO_TIMESTAMP) 342 ip6_savecontrol(last, &opts, ip6, m); 343 344 m_adj(m, off + sizeof(struct udphdr)); 345 if (sbappendaddr(&last->in6p_socket->so_rcv, 346 (struct sockaddr *)&udp_in6, 347 m, opts) == 0) { 348 udpstat.udps_fullsock++; 349 goto bad; 350 } 351 sorwakeup(last->in6p_socket); 352 return IPPROTO_DONE; 353 } 354 /* 355 * Locate pcb for datagram. 356 */ 357 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 358 &ip6->ip6_dst, uh->uh_dport, 1, 359 m->m_pkthdr.rcvif); 360 if (in6p == 0) { 361 if (log_in_vain) { 362 char buf[INET6_ADDRSTRLEN]; 363 364 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 365 log(LOG_INFO, 366 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 367 buf, ntohs(uh->uh_dport), 368 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 369 } 370 udpstat.udps_noport++; 371 if (m->m_flags & M_MCAST) { 372 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 373 udpstat.udps_noportmcast++; 374 goto bad; 375 } 376 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 377 return IPPROTO_DONE; 378 } 379 #ifdef IPSEC 380 /* 381 * Check AH/ESP integrity. 382 */ 383 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 384 ipsec6stat.in_polvio++; 385 goto bad; 386 } 387 #endif /* IPSEC */ 388 #ifdef FAST_IPSEC 389 /* 390 * Check AH/ESP integrity. 391 */ 392 if (ipsec6_in_reject(m, in6p)) { 393 goto bad; 394 } 395 #endif /* FAST_IPSEC */ 396 397 /* 398 * Construct sockaddr format source address. 399 * Stuff source address and datagram in user buffer. 400 */ 401 init_sin6(&udp_in6, m); /* general init */ 402 udp_in6.sin6_port = uh->uh_sport; 403 if (in6p->in6p_flags & IN6P_CONTROLOPTS 404 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 405 ip6_savecontrol(in6p, &opts, ip6, m); 406 m_adj(m, off + sizeof(struct udphdr)); 407 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 408 (struct sockaddr *)&udp_in6, 409 m, opts) == 0) { 410 udpstat.udps_fullsock++; 411 goto bad; 412 } 413 sorwakeup(in6p->in6p_socket); 414 return IPPROTO_DONE; 415 bad: 416 if (m) 417 m_freem(m); 418 if (opts) 419 m_freem(opts); 420 return IPPROTO_DONE; 421 } 422 423 void 424 udp6_ctlinput(cmd, sa, d) 425 int cmd; 426 struct sockaddr *sa; 427 void *d; 428 { 429 struct udphdr uh; 430 struct ip6_hdr *ip6; 431 struct mbuf *m; 432 int off = 0; 433 struct ip6ctlparam *ip6cp = NULL; 434 const struct sockaddr_in6 *sa6_src = NULL; 435 void (*notify) (struct inpcb *, int) = udp_notify; 436 struct udp_portonly { 437 u_int16_t uh_sport; 438 u_int16_t uh_dport; 439 } *uhp; 440 441 if (sa->sa_family != AF_INET6 || 442 sa->sa_len != sizeof(struct sockaddr_in6)) 443 return; 444 445 if ((unsigned)cmd >= PRC_NCMDS) 446 return; 447 if (PRC_IS_REDIRECT(cmd)) 448 notify = in6_rtchange, d = NULL; 449 else if (cmd == PRC_HOSTDEAD) 450 d = NULL; 451 else if (inet6ctlerrmap[cmd] == 0) 452 return; 453 454 /* if the parameter is from icmp6, decode it. */ 455 if (d != NULL) { 456 ip6cp = (struct ip6ctlparam *)d; 457 m = ip6cp->ip6c_m; 458 ip6 = ip6cp->ip6c_ip6; 459 off = ip6cp->ip6c_off; 460 sa6_src = ip6cp->ip6c_src; 461 } else { 462 m = NULL; 463 ip6 = NULL; 464 sa6_src = &sa6_any; 465 } 466 467 if (ip6) { 468 /* 469 * XXX: We assume that when IPV6 is non NULL, 470 * M and OFF are valid. 471 */ 472 473 /* check if we can safely examine src and dst ports */ 474 if (m->m_pkthdr.len < off + sizeof(*uhp)) 475 return; 476 477 bzero(&uh, sizeof(uh)); 478 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 479 480 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 481 (struct sockaddr *)ip6cp->ip6c_src, 482 uh.uh_sport, cmd, notify); 483 } else 484 (void) in6_pcbnotify(&udb, sa, 0, (const struct sockaddr *)sa6_src, 485 0, cmd, notify); 486 } 487 488 static int 489 udp6_getcred(SYSCTL_HANDLER_ARGS) 490 { 491 struct sockaddr_in6 addrs[2]; 492 struct inpcb *inp; 493 int error, s; 494 495 error = suser(req->td); 496 if (error) 497 return (error); 498 499 if (req->newlen != sizeof(addrs)) 500 return (EINVAL); 501 if (req->oldlen != sizeof(struct ucred)) 502 return (EINVAL); 503 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 504 if (error) 505 return (error); 506 s = splnet(); 507 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 508 addrs[1].sin6_port, 509 &addrs[0].sin6_addr, addrs[0].sin6_port, 510 1, NULL); 511 if (!inp || !inp->inp_socket) { 512 error = ENOENT; 513 goto out; 514 } 515 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 516 sizeof(struct ucred)); 517 518 out: 519 splx(s); 520 return (error); 521 } 522 523 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 524 0, 0, 525 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 526 527 static int 528 udp6_abort(struct socket *so) 529 { 530 struct inpcb *inp; 531 int s; 532 533 inp = sotoinpcb(so); 534 if (inp == 0) 535 return EINVAL; /* ??? possible? panic instead? */ 536 soisdisconnected(so); 537 s = splnet(); 538 in6_pcbdetach(inp); 539 splx(s); 540 return 0; 541 } 542 543 static int 544 udp6_attach(struct socket *so, int proto, struct thread *td) 545 { 546 struct inpcb *inp; 547 int s, error; 548 549 inp = sotoinpcb(so); 550 if (inp != 0) 551 return EINVAL; 552 553 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 554 error = soreserve(so, udp_sendspace, udp_recvspace); 555 if (error) 556 return error; 557 } 558 s = splnet(); 559 error = in_pcballoc(so, &udbinfo, td); 560 splx(s); 561 if (error) 562 return error; 563 inp = (struct inpcb *)so->so_pcb; 564 inp->inp_vflag |= INP_IPV6; 565 if (!ip6_v6only) 566 inp->inp_vflag |= INP_IPV4; 567 inp->in6p_hops = -1; /* use kernel default */ 568 inp->in6p_cksum = -1; /* just to be sure */ 569 /* 570 * XXX: ugly!! 571 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 572 * because the socket may be bound to an IPv6 wildcard address, 573 * which may match an IPv4-mapped IPv6 address. 574 */ 575 inp->inp_ip_ttl = ip_defttl; 576 return 0; 577 } 578 579 static int 580 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 581 { 582 struct inpcb *inp; 583 int s, error; 584 585 inp = sotoinpcb(so); 586 if (inp == 0) 587 return EINVAL; 588 589 inp->inp_vflag &= ~INP_IPV4; 590 inp->inp_vflag |= INP_IPV6; 591 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 592 struct sockaddr_in6 *sin6_p; 593 594 sin6_p = (struct sockaddr_in6 *)nam; 595 596 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 597 inp->inp_vflag |= INP_IPV4; 598 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 599 struct sockaddr_in sin; 600 601 in6_sin6_2_sin(&sin, sin6_p); 602 inp->inp_vflag |= INP_IPV4; 603 inp->inp_vflag &= ~INP_IPV6; 604 s = splnet(); 605 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 606 splx(s); 607 return error; 608 } 609 } 610 611 s = splnet(); 612 error = in6_pcbbind(inp, nam, td); 613 splx(s); 614 return error; 615 } 616 617 static int 618 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 619 { 620 struct inpcb *inp; 621 int s, error; 622 623 inp = sotoinpcb(so); 624 if (inp == 0) 625 return EINVAL; 626 627 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 628 struct sockaddr_in6 *sin6_p; 629 630 sin6_p = (struct sockaddr_in6 *)nam; 631 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 632 struct sockaddr_in sin; 633 634 if (inp->inp_faddr.s_addr != INADDR_ANY) 635 return EISCONN; 636 in6_sin6_2_sin(&sin, sin6_p); 637 s = splnet(); 638 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 639 splx(s); 640 if (error == 0) { 641 inp->inp_vflag |= INP_IPV4; 642 inp->inp_vflag &= ~INP_IPV6; 643 soisconnected(so); 644 } 645 return error; 646 } 647 } 648 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 649 return EISCONN; 650 s = splnet(); 651 error = in6_pcbconnect(inp, nam, td); 652 splx(s); 653 if (error == 0) { 654 if (!ip6_v6only) { /* should be non mapped addr */ 655 inp->inp_vflag &= ~INP_IPV4; 656 inp->inp_vflag |= INP_IPV6; 657 } 658 soisconnected(so); 659 } 660 return error; 661 } 662 663 static int 664 udp6_detach(struct socket *so) 665 { 666 struct inpcb *inp; 667 int s; 668 669 inp = sotoinpcb(so); 670 if (inp == 0) 671 return EINVAL; 672 s = splnet(); 673 in6_pcbdetach(inp); 674 splx(s); 675 return 0; 676 } 677 678 static int 679 udp6_disconnect(struct socket *so) 680 { 681 struct inpcb *inp; 682 int s; 683 684 inp = sotoinpcb(so); 685 if (inp == 0) 686 return EINVAL; 687 688 if (inp->inp_vflag & INP_IPV4) { 689 struct pr_usrreqs *pru; 690 691 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 692 return ((*pru->pru_disconnect)(so)); 693 } 694 695 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 696 return ENOTCONN; 697 698 s = splnet(); 699 in6_pcbdisconnect(inp); 700 inp->in6p_laddr = in6addr_any; 701 splx(s); 702 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 703 return 0; 704 } 705 706 static int 707 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 708 struct mbuf *control, struct thread *td) 709 { 710 struct inpcb *inp; 711 int error = 0; 712 713 inp = sotoinpcb(so); 714 if (inp == 0) { 715 error = EINVAL; 716 goto bad; 717 } 718 719 if (addr) { 720 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 721 error = EINVAL; 722 goto bad; 723 } 724 if (addr->sa_family != AF_INET6) { 725 error = EAFNOSUPPORT; 726 goto bad; 727 } 728 } 729 730 if (!ip6_v6only) { 731 int hasv4addr; 732 struct sockaddr_in6 *sin6 = 0; 733 734 if (addr == 0) 735 hasv4addr = (inp->inp_vflag & INP_IPV4); 736 else { 737 sin6 = (struct sockaddr_in6 *)addr; 738 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 739 ? 1 : 0; 740 } 741 if (hasv4addr) { 742 struct pr_usrreqs *pru; 743 744 if (sin6) 745 in6_sin6_2_sin_in_sock(addr); 746 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 747 error = ((*pru->pru_send)(so, flags, m, addr, 748 control, td)); 749 /* addr will just be freed in sendit(). */ 750 return error; 751 } 752 } 753 754 return udp6_output(inp, m, addr, control, td); 755 756 bad: 757 m_freem(m); 758 return(error); 759 } 760 761 struct pr_usrreqs udp6_usrreqs = { 762 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 763 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 764 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 765 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 766 in6_mapped_sockaddr, sosend, soreceive, sopoll 767 }; 768