1 /* $FreeBSD$ */ 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 /* 113 * UDP protocol inplementation. 114 * Per RFC 768, August, 1980. 115 */ 116 117 extern struct protosw inetsw[]; 118 static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 119 static int udp6_detach __P((struct socket *so)); 120 121 static int 122 in6_mcmatch(in6p, ia6, ifp) 123 struct inpcb *in6p; 124 register struct in6_addr *ia6; 125 struct ifnet *ifp; 126 { 127 struct ip6_moptions *im6o = in6p->in6p_moptions; 128 struct in6_multi_mship *imm; 129 130 if (im6o == NULL) 131 return 0; 132 133 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 134 imm = imm->i6mm_chain.le_next) { 135 if ((ifp == NULL || 136 imm->i6mm_maddr->in6m_ifp == ifp) && 137 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 138 ia6)) 139 return 1; 140 } 141 return 0; 142 } 143 144 int 145 udp6_input(mp, offp, proto) 146 struct mbuf **mp; 147 int *offp, proto; 148 { 149 struct mbuf *m = *mp; 150 register struct ip6_hdr *ip6; 151 register struct udphdr *uh; 152 register struct inpcb *in6p; 153 struct mbuf *opts = NULL; 154 int off = *offp; 155 int plen, ulen; 156 struct sockaddr_in6 udp_in6; 157 158 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 159 160 ip6 = mtod(m, struct ip6_hdr *); 161 162 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 163 /* XXX send icmp6 host/port unreach? */ 164 m_freem(m); 165 return IPPROTO_DONE; 166 } 167 168 udpstat.udps_ipackets++; 169 170 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 171 uh = (struct udphdr *)((caddr_t)ip6 + off); 172 ulen = ntohs((u_short)uh->uh_ulen); 173 174 if (plen != ulen) { 175 udpstat.udps_badlen++; 176 goto bad; 177 } 178 179 /* 180 * Checksum extended UDP header and data. 181 */ 182 if (uh->uh_sum == 0) 183 udpstat.udps_nosum++; 184 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 185 udpstat.udps_badsum++; 186 goto bad; 187 } 188 189 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 190 struct inpcb *last; 191 192 /* 193 * Deliver a multicast datagram to all sockets 194 * for which the local and remote addresses and ports match 195 * those of the incoming datagram. This allows more than 196 * one process to receive multicasts on the same port. 197 * (This really ought to be done for unicast datagrams as 198 * well, but that would cause problems with existing 199 * applications that open both address-specific sockets and 200 * a wildcard socket listening to the same port -- they would 201 * end up receiving duplicates of every unicast datagram. 202 * Those applications open the multiple sockets to overcome an 203 * inadequacy of the UDP socket interface, but for backwards 204 * compatibility we avoid the problem here rather than 205 * fixing the interface. Maybe 4.5BSD will remedy this?) 206 */ 207 208 /* 209 * In a case that laddr should be set to the link-local 210 * address (this happens in RIPng), the multicast address 211 * specified in the received packet does not match with 212 * laddr. To cure this situation, the matching is relaxed 213 * if the receiving interface is the same as one specified 214 * in the socket and if the destination multicast address 215 * matches one of the multicast groups specified in the socket. 216 */ 217 218 /* 219 * Construct sockaddr format source address. 220 */ 221 init_sin6(&udp_in6, m); /* general init */ 222 udp_in6.sin6_port = uh->uh_sport; 223 /* 224 * KAME note: traditionally we dropped udpiphdr from mbuf here. 225 * We need udphdr for IPsec processing so we do that later. 226 */ 227 228 /* 229 * Locate pcb(s) for datagram. 230 * (Algorithm copied from raw_intr().) 231 */ 232 last = NULL; 233 LIST_FOREACH(in6p, &udb, inp_list) { 234 if ((in6p->inp_vflag & INP_IPV6) == 0) 235 continue; 236 if (in6p->in6p_lport != uh->uh_dport) 237 continue; 238 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 239 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 240 &ip6->ip6_dst) && 241 !in6_mcmatch(in6p, &ip6->ip6_dst, 242 m->m_pkthdr.rcvif)) 243 continue; 244 } 245 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 246 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 247 &ip6->ip6_src) || 248 in6p->in6p_fport != uh->uh_sport) 249 continue; 250 } 251 252 if (last != NULL) { 253 struct mbuf *n; 254 255 #ifdef IPSEC 256 /* 257 * Check AH/ESP integrity. 258 */ 259 if (ipsec6_in_reject_so(m, last->inp_socket)) 260 ipsec6stat.in_polvio++; 261 /* do not inject data into pcb */ 262 else 263 #endif /* IPSEC */ 264 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 265 /* 266 * KAME NOTE: do not 267 * m_copy(m, offset, ...) above. 268 * sbappendaddr() expects M_PKTHDR, 269 * and m_copy() will copy M_PKTHDR 270 * only if offset is 0. 271 */ 272 if (last->in6p_flags & IN6P_CONTROLOPTS 273 || last->in6p_socket->so_options & SO_TIMESTAMP) 274 ip6_savecontrol(last, &opts, 275 ip6, n); 276 277 m_adj(n, off + sizeof(struct udphdr)); 278 if (sbappendaddr(&last->in6p_socket->so_rcv, 279 (struct sockaddr *)&udp_in6, 280 n, opts) == 0) { 281 m_freem(n); 282 if (opts) 283 m_freem(opts); 284 udpstat.udps_fullsock++; 285 } else 286 sorwakeup(last->in6p_socket); 287 opts = NULL; 288 } 289 } 290 last = in6p; 291 /* 292 * Don't look for additional matches if this one does 293 * not have either the SO_REUSEPORT or SO_REUSEADDR 294 * socket options set. This heuristic avoids searching 295 * through all pcbs in the common case of a non-shared 296 * port. It assumes that an application will never 297 * clear these options after setting them. 298 */ 299 if ((last->in6p_socket->so_options & 300 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 301 break; 302 } 303 304 if (last == NULL) { 305 /* 306 * No matching pcb found; discard datagram. 307 * (No need to send an ICMP Port Unreachable 308 * for a broadcast or multicast datgram.) 309 */ 310 udpstat.udps_noport++; 311 udpstat.udps_noportmcast++; 312 goto bad; 313 } 314 #ifdef IPSEC 315 /* 316 * Check AH/ESP integrity. 317 */ 318 if (ipsec6_in_reject_so(m, last->inp_socket)) { 319 ipsec6stat.in_polvio++; 320 goto bad; 321 } 322 #endif /* IPSEC */ 323 if (last->in6p_flags & IN6P_CONTROLOPTS 324 || last->in6p_socket->so_options & SO_TIMESTAMP) 325 ip6_savecontrol(last, &opts, ip6, m); 326 327 m_adj(m, off + sizeof(struct udphdr)); 328 if (sbappendaddr(&last->in6p_socket->so_rcv, 329 (struct sockaddr *)&udp_in6, 330 m, opts) == 0) { 331 udpstat.udps_fullsock++; 332 goto bad; 333 } 334 sorwakeup(last->in6p_socket); 335 return IPPROTO_DONE; 336 } 337 /* 338 * Locate pcb for datagram. 339 */ 340 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 341 &ip6->ip6_dst, uh->uh_dport, 1, 342 m->m_pkthdr.rcvif); 343 if (in6p == 0) { 344 if (log_in_vain) { 345 char buf[INET6_ADDRSTRLEN]; 346 347 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 348 log(LOG_INFO, 349 "Connection attempt to UDP %s:%d from %s:%d\n", 350 buf, ntohs(uh->uh_dport), 351 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 352 } 353 udpstat.udps_noport++; 354 if (m->m_flags & M_MCAST) { 355 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 356 udpstat.udps_noportmcast++; 357 goto bad; 358 } 359 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 360 return IPPROTO_DONE; 361 } 362 #ifdef IPSEC 363 /* 364 * Check AH/ESP integrity. 365 */ 366 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 367 ipsec6stat.in_polvio++; 368 goto bad; 369 } 370 #endif /* IPSEC */ 371 372 /* 373 * Construct sockaddr format source address. 374 * Stuff source address and datagram in user buffer. 375 */ 376 init_sin6(&udp_in6, m); /* general init */ 377 udp_in6.sin6_port = uh->uh_sport; 378 if (in6p->in6p_flags & IN6P_CONTROLOPTS 379 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 380 ip6_savecontrol(in6p, &opts, ip6, m); 381 m_adj(m, off + sizeof(struct udphdr)); 382 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 383 (struct sockaddr *)&udp_in6, 384 m, opts) == 0) { 385 udpstat.udps_fullsock++; 386 goto bad; 387 } 388 sorwakeup(in6p->in6p_socket); 389 return IPPROTO_DONE; 390 bad: 391 if (m) 392 m_freem(m); 393 if (opts) 394 m_freem(opts); 395 return IPPROTO_DONE; 396 } 397 398 void 399 udp6_ctlinput(cmd, sa, d) 400 int cmd; 401 struct sockaddr *sa; 402 void *d; 403 { 404 struct udphdr uh; 405 struct ip6_hdr *ip6; 406 struct mbuf *m; 407 int off = 0; 408 struct ip6ctlparam *ip6cp = NULL; 409 const struct sockaddr_in6 *sa6_src = NULL; 410 void (*notify) __P((struct inpcb *, int)) = udp_notify; 411 struct udp_portonly { 412 u_int16_t uh_sport; 413 u_int16_t uh_dport; 414 } *uhp; 415 416 if (sa->sa_family != AF_INET6 || 417 sa->sa_len != sizeof(struct sockaddr_in6)) 418 return; 419 420 if ((unsigned)cmd >= PRC_NCMDS) 421 return; 422 if (PRC_IS_REDIRECT(cmd)) 423 notify = in6_rtchange, d = NULL; 424 else if (cmd == PRC_HOSTDEAD) 425 d = NULL; 426 else if (inet6ctlerrmap[cmd] == 0) 427 return; 428 429 /* if the parameter is from icmp6, decode it. */ 430 if (d != NULL) { 431 ip6cp = (struct ip6ctlparam *)d; 432 m = ip6cp->ip6c_m; 433 ip6 = ip6cp->ip6c_ip6; 434 off = ip6cp->ip6c_off; 435 sa6_src = ip6cp->ip6c_src; 436 } else { 437 m = NULL; 438 ip6 = NULL; 439 sa6_src = &sa6_any; 440 } 441 442 if (ip6) { 443 /* 444 * XXX: We assume that when IPV6 is non NULL, 445 * M and OFF are valid. 446 */ 447 448 /* check if we can safely examine src and dst ports */ 449 if (m->m_pkthdr.len < off + sizeof(*uhp)) 450 return; 451 452 bzero(&uh, sizeof(uh)); 453 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 454 455 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 456 (struct sockaddr *)ip6cp->ip6c_src, 457 uh.uh_sport, cmd, notify); 458 } else 459 (void) in6_pcbnotify(&udb, sa, 0, 460 (const struct sockaddr *)sa6_src, 461 0, cmd, notify); 462 } 463 464 static int 465 udp6_getcred(SYSCTL_HANDLER_ARGS) 466 { 467 struct xucred xuc; 468 struct sockaddr_in6 addrs[2]; 469 struct inpcb *inp; 470 int error, s; 471 472 error = suser(req->td); 473 if (error) 474 return (error); 475 476 if (req->newlen != sizeof(addrs)) 477 return (EINVAL); 478 if (req->oldlen != sizeof(struct xucred)) 479 return (EINVAL); 480 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 481 if (error) 482 return (error); 483 s = splnet(); 484 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 485 addrs[1].sin6_port, 486 &addrs[0].sin6_addr, addrs[0].sin6_port, 487 1, NULL); 488 if (!inp || !inp->inp_socket) { 489 error = ENOENT; 490 goto out; 491 } 492 cru2x(inp->inp_socket->so_cred, &xuc); 493 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 494 out: 495 splx(s); 496 return (error); 497 } 498 499 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 500 0, 0, 501 udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 502 503 static int 504 udp6_abort(struct socket *so) 505 { 506 struct inpcb *inp; 507 int s; 508 509 inp = sotoinpcb(so); 510 if (inp == 0) 511 return EINVAL; /* ??? possible? panic instead? */ 512 soisdisconnected(so); 513 s = splnet(); 514 in6_pcbdetach(inp); 515 splx(s); 516 return 0; 517 } 518 519 static int 520 udp6_attach(struct socket *so, int proto, struct thread *td) 521 { 522 struct inpcb *inp; 523 int s, error; 524 525 inp = sotoinpcb(so); 526 if (inp != 0) 527 return EINVAL; 528 529 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 530 error = soreserve(so, udp_sendspace, udp_recvspace); 531 if (error) 532 return error; 533 } 534 s = splnet(); 535 error = in_pcballoc(so, &udbinfo, td); 536 splx(s); 537 if (error) 538 return error; 539 inp = (struct inpcb *)so->so_pcb; 540 inp->inp_vflag |= INP_IPV6; 541 inp->in6p_hops = -1; /* use kernel default */ 542 inp->in6p_cksum = -1; /* just to be sure */ 543 /* 544 * XXX: ugly!! 545 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 546 * because the socket may be bound to an IPv6 wildcard address, 547 * which may match an IPv4-mapped IPv6 address. 548 */ 549 inp->inp_ip_ttl = ip_defttl; 550 return 0; 551 } 552 553 static int 554 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 555 { 556 struct inpcb *inp; 557 int s, error; 558 559 inp = sotoinpcb(so); 560 if (inp == 0) 561 return EINVAL; 562 563 inp->inp_vflag &= ~INP_IPV4; 564 inp->inp_vflag |= INP_IPV6; 565 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 566 struct sockaddr_in6 *sin6_p; 567 568 sin6_p = (struct sockaddr_in6 *)nam; 569 570 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 571 inp->inp_vflag |= INP_IPV4; 572 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 573 struct sockaddr_in sin; 574 575 in6_sin6_2_sin(&sin, sin6_p); 576 inp->inp_vflag |= INP_IPV4; 577 inp->inp_vflag &= ~INP_IPV6; 578 s = splnet(); 579 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 580 splx(s); 581 return error; 582 } 583 } 584 585 s = splnet(); 586 error = in6_pcbbind(inp, nam, td); 587 splx(s); 588 return error; 589 } 590 591 static int 592 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 593 { 594 struct inpcb *inp; 595 int s, error; 596 597 inp = sotoinpcb(so); 598 if (inp == 0) 599 return EINVAL; 600 601 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 602 struct sockaddr_in6 *sin6_p; 603 604 sin6_p = (struct sockaddr_in6 *)nam; 605 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 606 struct sockaddr_in sin; 607 608 if (inp->inp_faddr.s_addr != INADDR_ANY) 609 return EISCONN; 610 in6_sin6_2_sin(&sin, sin6_p); 611 s = splnet(); 612 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 613 splx(s); 614 if (error == 0) { 615 inp->inp_vflag |= INP_IPV4; 616 inp->inp_vflag &= ~INP_IPV6; 617 soisconnected(so); 618 } 619 return error; 620 } 621 } 622 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 623 return EISCONN; 624 s = splnet(); 625 error = in6_pcbconnect(inp, nam, td); 626 splx(s); 627 if (error == 0) { 628 if (ip6_mapped_addr_on) { /* should be non mapped addr */ 629 inp->inp_vflag &= ~INP_IPV4; 630 inp->inp_vflag |= INP_IPV6; 631 } 632 soisconnected(so); 633 } 634 return error; 635 } 636 637 static int 638 udp6_detach(struct socket *so) 639 { 640 struct inpcb *inp; 641 int s; 642 643 inp = sotoinpcb(so); 644 if (inp == 0) 645 return EINVAL; 646 s = splnet(); 647 in6_pcbdetach(inp); 648 splx(s); 649 return 0; 650 } 651 652 static int 653 udp6_disconnect(struct socket *so) 654 { 655 struct inpcb *inp; 656 int s; 657 658 inp = sotoinpcb(so); 659 if (inp == 0) 660 return EINVAL; 661 662 if (inp->inp_vflag & INP_IPV4) { 663 struct pr_usrreqs *pru; 664 665 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 666 return ((*pru->pru_disconnect)(so)); 667 } 668 669 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 670 return ENOTCONN; 671 672 s = splnet(); 673 in6_pcbdisconnect(inp); 674 inp->in6p_laddr = in6addr_any; 675 splx(s); 676 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 677 return 0; 678 } 679 680 static int 681 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 682 struct mbuf *control, struct thread *td) 683 { 684 struct inpcb *inp; 685 int error = 0; 686 687 inp = sotoinpcb(so); 688 if (inp == 0) { 689 error = EINVAL; 690 goto bad; 691 } 692 693 if (addr) { 694 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 695 error = EINVAL; 696 goto bad; 697 } 698 if (addr->sa_family != AF_INET6) { 699 error = EAFNOSUPPORT; 700 goto bad; 701 } 702 } 703 704 if (ip6_mapped_addr_on) { 705 int hasv4addr; 706 struct sockaddr_in6 *sin6 = 0; 707 708 if (addr == 0) 709 hasv4addr = (inp->inp_vflag & INP_IPV4); 710 else { 711 sin6 = (struct sockaddr_in6 *)addr; 712 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 713 ? 1 : 0; 714 } 715 if (hasv4addr) { 716 struct pr_usrreqs *pru; 717 718 if (sin6) 719 in6_sin6_2_sin_in_sock(addr); 720 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 721 error = ((*pru->pru_send)(so, flags, m, addr, control, 722 td)); 723 /* addr will just be freed in sendit(). */ 724 return error; 725 } 726 } 727 728 return udp6_output(inp, m, addr, control, td); 729 730 bad: 731 m_freem(m); 732 return(error); 733 } 734 735 struct pr_usrreqs udp6_usrreqs = { 736 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 737 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 738 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 739 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 740 in6_mapped_sockaddr, sosend, soreceive, sopoll 741 }; 742