udp6_usrreq.c revision 80406
1/* $FreeBSD: head/sys/netinet6/udp6_usrreq.c 80406 2001-07-26 19:19:49Z 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/kernel.h> 74#include <sys/mbuf.h> 75#include <sys/protosw.h> 76#include <sys/socket.h> 77#include <sys/socketvar.h> 78#include <sys/sysctl.h> 79#include <sys/errno.h> 80#include <sys/stat.h> 81#include <sys/systm.h> 82#include <sys/syslog.h> 83#include <sys/proc.h> 84 85#include <net/if.h> 86#include <net/route.h> 87#include <net/if_types.h> 88 89#include <netinet/in.h> 90#include <netinet/in_systm.h> 91#include <netinet/ip.h> 92#include <netinet/in_pcb.h> 93#include <netinet/in_var.h> 94#include <netinet/ip_var.h> 95#include <netinet/udp.h> 96#include <netinet/udp_var.h> 97#include <netinet/ip6.h> 98#include <netinet6/ip6_var.h> 99#include <netinet6/in6_pcb.h> 100#include <netinet/icmp6.h> 101#include <netinet6/udp6_var.h> 102#include <netinet6/ip6protosw.h> 103 104#ifdef IPSEC 105#include <netinet6/ipsec.h> 106#include <netinet6/ipsec6.h> 107#endif /*IPSEC*/ 108 109#include "faith.h" 110#if defined(NFAITH) && NFAITH > 0 111#include <net/if_faith.h> 112#endif 113 114/* 115 * UDP protocol inplementation. 116 * Per RFC 768, August, 1980. 117 */ 118 119extern struct protosw inetsw[]; 120static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 121static int udp6_detach __P((struct socket *so)); 122 123static int 124in6_mcmatch(in6p, ia6, ifp) 125 struct inpcb *in6p; 126 register struct in6_addr *ia6; 127 struct ifnet *ifp; 128{ 129 struct ip6_moptions *im6o = in6p->in6p_moptions; 130 struct in6_multi_mship *imm; 131 132 if (im6o == NULL) 133 return 0; 134 135 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 136 imm = imm->i6mm_chain.le_next) { 137 if ((ifp == NULL || 138 imm->i6mm_maddr->in6m_ifp == ifp) && 139 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 140 ia6)) 141 return 1; 142 } 143 return 0; 144} 145 146int 147udp6_input(mp, offp, proto) 148 struct mbuf **mp; 149 int *offp, proto; 150{ 151 struct mbuf *m = *mp; 152 register struct ip6_hdr *ip6; 153 register struct udphdr *uh; 154 register struct inpcb *in6p; 155 struct mbuf *opts = NULL; 156 int off = *offp; 157 int plen, ulen; 158 struct sockaddr_in6 udp_in6; 159 160 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 161 162 ip6 = mtod(m, struct ip6_hdr *); 163 164#if defined(NFAITH) && 0 < NFAITH 165 if (faithprefix(&ip6->ip6_dst)) { 166 /* XXX send icmp6 host/port unreach? */ 167 m_freem(m); 168 return IPPROTO_DONE; 169 } 170#endif 171 172 udpstat.udps_ipackets++; 173 174 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 175 uh = (struct udphdr *)((caddr_t)ip6 + off); 176 ulen = ntohs((u_short)uh->uh_ulen); 177 178 if (plen != ulen) { 179 udpstat.udps_badlen++; 180 goto bad; 181 } 182 183 /* 184 * Checksum extended UDP header and data. 185 */ 186 if (uh->uh_sum == 0) 187 udpstat.udps_nosum++; 188 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 189 udpstat.udps_badsum++; 190 goto bad; 191 } 192 193 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 194 struct inpcb *last; 195 196 /* 197 * Deliver a multicast datagram to all sockets 198 * for which the local and remote addresses and ports match 199 * those of the incoming datagram. This allows more than 200 * one process to receive multicasts on the same port. 201 * (This really ought to be done for unicast datagrams as 202 * well, but that would cause problems with existing 203 * applications that open both address-specific sockets and 204 * a wildcard socket listening to the same port -- they would 205 * end up receiving duplicates of every unicast datagram. 206 * Those applications open the multiple sockets to overcome an 207 * inadequacy of the UDP socket interface, but for backwards 208 * compatibility we avoid the problem here rather than 209 * fixing the interface. Maybe 4.5BSD will remedy this?) 210 */ 211 212 /* 213 * In a case that laddr should be set to the link-local 214 * address (this happens in RIPng), the multicast address 215 * specified in the received packet does not match with 216 * laddr. To cure this situation, the matching is relaxed 217 * if the receiving interface is the same as one specified 218 * in the socket and if the destination multicast address 219 * matches one of the multicast groups specified in the socket. 220 */ 221 222 /* 223 * Construct sockaddr format source address. 224 */ 225 init_sin6(&udp_in6, m); /* general init */ 226 udp_in6.sin6_port = uh->uh_sport; 227 /* 228 * KAME note: usually we drop udphdr from mbuf here. 229 * We need udphdr for IPsec processing so we do that later. 230 */ 231 232 /* 233 * Locate pcb(s) for datagram. 234 * (Algorithm copied from raw_intr().) 235 */ 236 last = NULL; 237 LIST_FOREACH(in6p, &udb, inp_list) { 238 if ((in6p->inp_vflag & INP_IPV6) == 0) 239 continue; 240 if (in6p->in6p_lport != uh->uh_dport) 241 continue; 242 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 243 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 244 &ip6->ip6_dst) && 245 !in6_mcmatch(in6p, &ip6->ip6_dst, 246 m->m_pkthdr.rcvif)) 247 continue; 248 } 249 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 250 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 251 &ip6->ip6_src) || 252 in6p->in6p_fport != uh->uh_sport) 253 continue; 254 } 255 256 if (last != NULL) { 257 struct mbuf *n; 258 259#ifdef IPSEC 260 /* 261 * Check AH/ESP integrity. 262 */ 263 if (ipsec6_in_reject_so(m, last->inp_socket)) 264 ipsec6stat.in_polvio++; 265 /* do not inject data into pcb */ 266 else 267#endif /*IPSEC*/ 268 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 269 /* 270 * KAME NOTE: do not 271 * m_copy(m, offset, ...) above. 272 * sbappendaddr() expects M_PKTHDR, 273 * and m_copy() will copy M_PKTHDR 274 * only if offset is 0. 275 */ 276 if (last->in6p_flags & IN6P_CONTROLOPTS 277 || last->in6p_socket->so_options & SO_TIMESTAMP) 278 ip6_savecontrol(last, &opts, 279 ip6, n); 280 281 m_adj(n, off + sizeof(struct udphdr)); 282 if (sbappendaddr(&last->in6p_socket->so_rcv, 283 (struct sockaddr *)&udp_in6, 284 n, opts) == 0) { 285 m_freem(n); 286 if (opts) 287 m_freem(opts); 288 udpstat.udps_fullsock++; 289 } else 290 sorwakeup(last->in6p_socket); 291 opts = NULL; 292 } 293 } 294 last = in6p; 295 /* 296 * Don't look for additional matches if this one does 297 * not have either the SO_REUSEPORT or SO_REUSEADDR 298 * socket options set. This heuristic avoids searching 299 * through all pcbs in the common case of a non-shared 300 * port. It assumes that an application will never 301 * clear these options after setting them. 302 */ 303 if ((last->in6p_socket->so_options & 304 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 305 break; 306 } 307 308 if (last == NULL) { 309 /* 310 * No matching pcb found; discard datagram. 311 * (No need to send an ICMP Port Unreachable 312 * for a broadcast or multicast datgram.) 313 */ 314 udpstat.udps_noport++; 315 udpstat.udps_noportmcast++; 316 goto bad; 317 } 318#ifdef IPSEC 319 /* 320 * Check AH/ESP integrity. 321 */ 322 if (ipsec6_in_reject_so(m, last->inp_socket)) { 323 ipsec6stat.in_polvio++; 324 goto bad; 325 } 326#endif /*IPSEC*/ 327 if (last->in6p_flags & IN6P_CONTROLOPTS 328 || last->in6p_socket->so_options & SO_TIMESTAMP) 329 ip6_savecontrol(last, &opts, ip6, m); 330 331 m_adj(m, off + sizeof(struct udphdr)); 332 if (sbappendaddr(&last->in6p_socket->so_rcv, 333 (struct sockaddr *)&udp_in6, 334 m, opts) == 0) { 335 udpstat.udps_fullsock++; 336 goto bad; 337 } 338 sorwakeup(last->in6p_socket); 339 return IPPROTO_DONE; 340 } 341 /* 342 * Locate pcb for datagram. 343 */ 344 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 345 &ip6->ip6_dst, uh->uh_dport, 1, 346 m->m_pkthdr.rcvif); 347 if (in6p == 0) { 348 if (log_in_vain) { 349 char buf[INET6_ADDRSTRLEN]; 350 351 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 352 log(LOG_INFO, 353 "Connection attempt to UDP %s:%d from %s:%d\n", 354 buf, ntohs(uh->uh_dport), 355 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 356 } 357 udpstat.udps_noport++; 358 if (m->m_flags & M_MCAST) { 359 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 360 udpstat.udps_noportmcast++; 361 goto bad; 362 } 363 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 364 return IPPROTO_DONE; 365 } 366#ifdef IPSEC 367 /* 368 * Check AH/ESP integrity. 369 */ 370 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 371 ipsec6stat.in_polvio++; 372 goto bad; 373 } 374#endif /*IPSEC*/ 375 376 /* 377 * Construct sockaddr format source address. 378 * Stuff source address and datagram in user buffer. 379 */ 380 init_sin6(&udp_in6, m); /* general init */ 381 udp_in6.sin6_port = uh->uh_sport; 382 if (in6p->in6p_flags & IN6P_CONTROLOPTS 383 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 384 ip6_savecontrol(in6p, &opts, ip6, m); 385 m_adj(m, off + sizeof(struct udphdr)); 386 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 387 (struct sockaddr *)&udp_in6, 388 m, opts) == 0) { 389 udpstat.udps_fullsock++; 390 goto bad; 391 } 392 sorwakeup(in6p->in6p_socket); 393 return IPPROTO_DONE; 394bad: 395 if (m) 396 m_freem(m); 397 if (opts) 398 m_freem(opts); 399 return IPPROTO_DONE; 400} 401 402void 403udp6_ctlinput(cmd, sa, d) 404 int cmd; 405 struct sockaddr *sa; 406 void *d; 407{ 408 struct udphdr uh; 409 struct ip6_hdr *ip6; 410 struct mbuf *m; 411 int off = 0; 412 struct ip6ctlparam *ip6cp = NULL; 413 const struct sockaddr_in6 *sa6_src = NULL; 414 void (*notify) __P((struct inpcb *, int)) = udp_notify; 415 struct udp_portonly { 416 u_int16_t uh_sport; 417 u_int16_t uh_dport; 418 } *uhp; 419 420 if (sa->sa_family != AF_INET6 || 421 sa->sa_len != sizeof(struct sockaddr_in6)) 422 return; 423 424 if ((unsigned)cmd >= PRC_NCMDS) 425 return; 426 if (PRC_IS_REDIRECT(cmd)) 427 notify = in6_rtchange, d = NULL; 428 else if (cmd == PRC_HOSTDEAD) 429 d = NULL; 430 else if (inet6ctlerrmap[cmd] == 0) 431 return; 432 433 /* if the parameter is from icmp6, decode it. */ 434 if (d != NULL) { 435 ip6cp = (struct ip6ctlparam *)d; 436 m = ip6cp->ip6c_m; 437 ip6 = ip6cp->ip6c_ip6; 438 off = ip6cp->ip6c_off; 439 sa6_src = ip6cp->ip6c_src; 440 } else { 441 m = NULL; 442 ip6 = NULL; 443 sa6_src = &sa6_any; 444 } 445 446 if (ip6) { 447 /* 448 * XXX: We assume that when IPV6 is non NULL, 449 * M and OFF are valid. 450 */ 451 452 /* check if we can safely examine src and dst ports */ 453 if (m->m_pkthdr.len < off + sizeof(*uhp)) 454 return; 455 456 bzero(&uh, sizeof(uh)); 457 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 458 459 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, ip6cp->ip6c_src, 460 uh.uh_sport, cmd, notify); 461 } else 462 (void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)&sa6_src, 463 0, cmd, notify); 464} 465 466static int 467udp6_getcred(SYSCTL_HANDLER_ARGS) 468{ 469 struct xucred xuc; 470 struct sockaddr_in6 addrs[2]; 471 struct inpcb *inp; 472 int error, s; 473 474 error = suser(req->p); 475 if (error) 476 return (error); 477 478 if (req->newlen != sizeof(addrs)) 479 return (EINVAL); 480 if (req->oldlen != sizeof(struct xucred)) 481 return (EINVAL); 482 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 483 if (error) 484 return (error); 485 s = splnet(); 486 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 487 addrs[1].sin6_port, 488 &addrs[0].sin6_addr, addrs[0].sin6_port, 489 1, NULL); 490 if (!inp || !inp->inp_socket) { 491 error = ENOENT; 492 goto out; 493 } 494 bzero(&xuc, sizeof(xuc)); 495 xuc.cr_uid = inp->inp_socket->so_cred->cr_uid; 496 xuc.cr_ngroups = inp->inp_socket->so_cred->cr_ngroups; 497 bcopy(inp->inp_socket->so_cred->cr_groups, xuc.cr_groups, 498 sizeof(xuc.cr_groups)); 499 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 500out: 501 splx(s); 502 return (error); 503} 504 505SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 506 0, 0, 507 udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 508 509static int 510udp6_abort(struct socket *so) 511{ 512 struct inpcb *inp; 513 int s; 514 515 inp = sotoinpcb(so); 516 if (inp == 0) 517 return EINVAL; /* ??? possible? panic instead? */ 518 soisdisconnected(so); 519 s = splnet(); 520 in6_pcbdetach(inp); 521 splx(s); 522 return 0; 523} 524 525static int 526udp6_attach(struct socket *so, int proto, struct proc *p) 527{ 528 struct inpcb *inp; 529 int s, error; 530 531 inp = sotoinpcb(so); 532 if (inp != 0) 533 return EINVAL; 534 535 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 536 error = soreserve(so, udp_sendspace, udp_recvspace); 537 if (error) 538 return error; 539 } 540 s = splnet(); 541 error = in_pcballoc(so, &udbinfo, p); 542 splx(s); 543 if (error) 544 return error; 545 inp = (struct inpcb *)so->so_pcb; 546 inp->inp_vflag |= INP_IPV6; 547 inp->in6p_hops = -1; /* use kernel default */ 548 inp->in6p_cksum = -1; /* just to be sure */ 549 /* 550 * XXX: ugly!! 551 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 552 * because the socket may be bound to an IPv6 wildcard address, 553 * which may match an IPv4-mapped IPv6 address. 554 */ 555 inp->inp_ip_ttl = ip_defttl; 556 return 0; 557} 558 559static int 560udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 561{ 562 struct inpcb *inp; 563 int s, error; 564 565 inp = sotoinpcb(so); 566 if (inp == 0) 567 return EINVAL; 568 569 inp->inp_vflag &= ~INP_IPV4; 570 inp->inp_vflag |= INP_IPV6; 571 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 572 struct sockaddr_in6 *sin6_p; 573 574 sin6_p = (struct sockaddr_in6 *)nam; 575 576 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 577 inp->inp_vflag |= INP_IPV4; 578 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 579 struct sockaddr_in sin; 580 581 in6_sin6_2_sin(&sin, sin6_p); 582 inp->inp_vflag |= INP_IPV4; 583 inp->inp_vflag &= ~INP_IPV6; 584 s = splnet(); 585 error = in_pcbbind(inp, (struct sockaddr *)&sin, p); 586 splx(s); 587 return error; 588 } 589 } 590 591 s = splnet(); 592 error = in6_pcbbind(inp, nam, p); 593 splx(s); 594 return error; 595} 596 597static int 598udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 599{ 600 struct inpcb *inp; 601 int s, error; 602 603 inp = sotoinpcb(so); 604 if (inp == 0) 605 return EINVAL; 606 607 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 608 struct sockaddr_in6 *sin6_p; 609 610 sin6_p = (struct sockaddr_in6 *)nam; 611 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 612 struct sockaddr_in sin; 613 614 if (inp->inp_faddr.s_addr != INADDR_ANY) 615 return EISCONN; 616 in6_sin6_2_sin(&sin, sin6_p); 617 s = splnet(); 618 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); 619 splx(s); 620 if (error == 0) { 621 inp->inp_vflag |= INP_IPV4; 622 inp->inp_vflag &= ~INP_IPV6; 623 soisconnected(so); 624 } 625 return error; 626 } 627 } 628 629 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 630 return EISCONN; 631 s = splnet(); 632 error = in6_pcbconnect(inp, nam, p); 633 splx(s); 634 if (error == 0) { 635 if (ip6_mapped_addr_on) { /* should be non mapped addr */ 636 inp->inp_vflag &= ~INP_IPV4; 637 inp->inp_vflag |= INP_IPV6; 638 } 639 soisconnected(so); 640 } 641 return error; 642} 643 644static int 645udp6_detach(struct socket *so) 646{ 647 struct inpcb *inp; 648 int s; 649 650 inp = sotoinpcb(so); 651 if (inp == 0) 652 return EINVAL; 653 s = splnet(); 654 in6_pcbdetach(inp); 655 splx(s); 656 return 0; 657} 658 659static int 660udp6_disconnect(struct socket *so) 661{ 662 struct inpcb *inp; 663 int s; 664 665 inp = sotoinpcb(so); 666 if (inp == 0) 667 return EINVAL; 668 669 if (inp->inp_vflag & INP_IPV4) { 670 struct pr_usrreqs *pru; 671 672 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 673 return ((*pru->pru_disconnect)(so)); 674 } 675 676 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 677 return ENOTCONN; 678 679 s = splnet(); 680 in6_pcbdisconnect(inp); 681 inp->in6p_laddr = in6addr_any; 682 splx(s); 683 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 684 return 0; 685} 686 687static int 688udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 689 struct mbuf *control, struct proc *p) 690{ 691 struct inpcb *inp; 692 int error = 0; 693 694 inp = sotoinpcb(so); 695 if (inp == 0) { 696 error = EINVAL; 697 goto bad; 698 } 699 700 if (addr) { 701 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 702 error = EINVAL; 703 goto bad; 704 } 705 if (addr->sa_family != AF_INET6) { 706 error = EAFNOSUPPORT; 707 goto bad; 708 } 709 } 710 711 if (ip6_mapped_addr_on) { 712 int hasv4addr; 713 struct sockaddr_in6 *sin6 = 0; 714 715 if (addr == 0) 716 hasv4addr = (inp->inp_vflag & INP_IPV4); 717 else { 718 sin6 = (struct sockaddr_in6 *)addr; 719 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 720 ? 1 : 0; 721 } 722 if (hasv4addr) { 723 struct pr_usrreqs *pru; 724 725 if (sin6) 726 in6_sin6_2_sin_in_sock(addr); 727 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 728 error = ((*pru->pru_send)(so, flags, m, addr, control, 729 p)); 730 /* addr will just be freed in sendit(). */ 731 return error; 732 } 733 } 734 735 return udp6_output(inp, m, addr, control, p); 736 737 bad: 738 m_freem(m); 739 return(error); 740} 741 742struct pr_usrreqs udp6_usrreqs = { 743 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 744 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 745 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 746 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 747 in6_mapped_sockaddr, sosend, soreceive, sopoll 748}; 749