1 /* $FreeBSD$ */ 2 /* $KAME: udp6_usrreq.c,v 1.11 2000/06/18 06:23:06 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" 110 111 /* 112 * UDP protocol inplementation. 113 * Per RFC 768, August, 1980. 114 */ 115 116 extern struct protosw inetsw[]; 117 static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 118 static int udp6_detach __P((struct socket *so)); 119 120 static int 121 in6_mcmatch(in6p, ia6, ifp) 122 struct inpcb *in6p; 123 register struct in6_addr *ia6; 124 struct ifnet *ifp; 125 { 126 struct ip6_moptions *im6o = in6p->in6p_moptions; 127 struct in6_multi_mship *imm; 128 129 if (im6o == NULL) 130 return 0; 131 132 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 133 imm = imm->i6mm_chain.le_next) { 134 if ((ifp == NULL || 135 imm->i6mm_maddr->in6m_ifp == ifp) && 136 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 137 ia6)) 138 return 1; 139 } 140 return 0; 141 } 142 143 int 144 udp6_input(mp, offp, proto) 145 struct mbuf **mp; 146 int *offp, proto; 147 { 148 struct mbuf *m = *mp; 149 register struct ip6_hdr *ip6; 150 register struct udphdr *uh; 151 register struct inpcb *in6p; 152 struct mbuf *opts = 0; 153 int off = *offp; 154 int plen, ulen; 155 struct sockaddr_in6 udp_in6; 156 157 #if defined(NFAITH) && 0 < NFAITH 158 if (m->m_pkthdr.rcvif) { 159 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 160 /* XXX send icmp6 host/port unreach? */ 161 m_freem(m); 162 return IPPROTO_DONE; 163 } 164 } 165 #endif 166 udpstat.udps_ipackets++; 167 168 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 169 170 ip6 = mtod(m, struct ip6_hdr *); 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: usually we drop udphdr 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 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 266 /* 267 * KAME NOTE: do not 268 * m_copy(m, offset, ...) above. 269 * sbappendaddr() expects M_PKTHDR, 270 * and m_copy() will copy M_PKTHDR 271 * only if offset is 0. 272 */ 273 if (last->in6p_flags & IN6P_CONTROLOPTS 274 || last->in6p_socket->so_options & SO_TIMESTAMP) 275 ip6_savecontrol(last, &opts, 276 ip6, n); 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 = 0; 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 register struct udphdr *uhp; 405 struct udphdr uh; 406 struct sockaddr_in6 sa6; 407 struct ip6_hdr *ip6; 408 struct mbuf *m; 409 int off = 0; 410 void (*notify) __P((struct inpcb *, int)) = udp_notify; 411 412 if (sa->sa_family != AF_INET6 || 413 sa->sa_len != sizeof(struct sockaddr_in6)) 414 return; 415 416 if ((unsigned)cmd >= PRC_NCMDS) 417 return; 418 if (PRC_IS_REDIRECT(cmd)) 419 notify = in6_rtchange, d = NULL; 420 else if (cmd == PRC_HOSTDEAD) 421 d = NULL; 422 else if (inet6ctlerrmap[cmd] == 0) 423 return; 424 425 /* if the parameter is from icmp6, decode it. */ 426 if (d != NULL) { 427 struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d; 428 m = ip6cp->ip6c_m; 429 ip6 = ip6cp->ip6c_ip6; 430 off = ip6cp->ip6c_off; 431 } else { 432 m = NULL; 433 ip6 = NULL; 434 } 435 436 /* translate addresses into internal form */ 437 sa6 = *(struct sockaddr_in6 *)sa; 438 if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) && m && m->m_pkthdr.rcvif) 439 sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); 440 441 if (ip6) { 442 /* 443 * XXX: We assume that when IPV6 is non NULL, 444 * M and OFF are valid. 445 */ 446 struct in6_addr s; 447 448 /* translate addresses into internal form */ 449 memcpy(&s, &ip6->ip6_src, sizeof(s)); 450 if (IN6_IS_ADDR_LINKLOCAL(&s)) 451 s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); 452 453 if (m->m_len < off + sizeof(uh)) { 454 /* 455 * this should be rare case, 456 * so we compromise on this copy... 457 */ 458 m_copydata(m, off, sizeof(uh), (caddr_t)&uh); 459 uhp = &uh; 460 } else 461 uhp = (struct udphdr *)(mtod(m, caddr_t) + off); 462 (void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6, 463 uhp->uh_dport, &s, 464 uhp->uh_sport, cmd, notify); 465 } else 466 (void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6, 0, 467 &zeroin6_addr, 0, cmd, notify); 468 } 469 470 static int 471 udp6_getcred(SYSCTL_HANDLER_ARGS) 472 { 473 struct sockaddr_in6 addrs[2]; 474 struct inpcb *inp; 475 int error, s; 476 477 error = suser(req->p); 478 if (error) 479 return (error); 480 481 if (req->newlen != sizeof(addrs)) 482 return (EINVAL); 483 if (req->oldlen != sizeof(struct ucred)) 484 return (EINVAL); 485 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 486 if (error) 487 return (error); 488 s = splnet(); 489 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 490 addrs[1].sin6_port, 491 &addrs[0].sin6_addr, addrs[0].sin6_port, 492 1, NULL); 493 if (!inp || !inp->inp_socket) { 494 error = ENOENT; 495 goto out; 496 } 497 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 498 sizeof(struct ucred)); 499 500 out: 501 splx(s); 502 return (error); 503 } 504 505 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 506 0, 0, 507 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 508 509 static int 510 udp6_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 } 524 525 static int 526 udp6_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 #ifdef IPSEC 557 error = ipsec_init_policy(so, &inp->in6p_sp); 558 if (error != 0) { 559 in6_pcbdetach(inp); 560 return (error); 561 } 562 #endif /*IPSEC*/ 563 return 0; 564 } 565 566 static int 567 udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 568 { 569 struct inpcb *inp; 570 int s, error; 571 572 inp = sotoinpcb(so); 573 if (inp == 0) 574 return EINVAL; 575 576 inp->inp_vflag &= ~INP_IPV4; 577 inp->inp_vflag |= INP_IPV6; 578 if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0) { 579 struct sockaddr_in6 *sin6_p; 580 581 sin6_p = (struct sockaddr_in6 *)nam; 582 583 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 584 inp->inp_vflag |= INP_IPV4; 585 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 586 struct sockaddr_in sin; 587 588 in6_sin6_2_sin(&sin, sin6_p); 589 inp->inp_vflag |= INP_IPV4; 590 inp->inp_vflag &= ~INP_IPV6; 591 s = splnet(); 592 error = in_pcbbind(inp, (struct sockaddr *)&sin, p); 593 splx(s); 594 return error; 595 } 596 } 597 598 s = splnet(); 599 error = in6_pcbbind(inp, nam, p); 600 splx(s); 601 return error; 602 } 603 604 static int 605 udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 606 { 607 struct inpcb *inp; 608 int s, error; 609 610 inp = sotoinpcb(so); 611 if (inp == 0) 612 return EINVAL; 613 if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0) { 614 struct sockaddr_in6 *sin6_p; 615 616 sin6_p = (struct sockaddr_in6 *)nam; 617 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 618 struct sockaddr_in sin; 619 620 if (inp->inp_faddr.s_addr != INADDR_ANY) 621 return EISCONN; 622 in6_sin6_2_sin(&sin, sin6_p); 623 s = splnet(); 624 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); 625 splx(s); 626 if (error == 0) { 627 inp->inp_vflag |= INP_IPV4; 628 inp->inp_vflag &= ~INP_IPV6; 629 soisconnected(so); 630 } 631 return error; 632 } 633 } 634 635 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 636 return EISCONN; 637 s = splnet(); 638 error = in6_pcbconnect(inp, nam, p); 639 if (ip6_auto_flowlabel) { 640 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 641 inp->in6p_flowinfo |= 642 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 643 } 644 splx(s); 645 if (error == 0) { 646 inp->inp_vflag &= ~INP_IPV4; 647 inp->inp_vflag |= INP_IPV6; 648 soisconnected(so); 649 } 650 return error; 651 } 652 653 static int 654 udp6_detach(struct socket *so) 655 { 656 struct inpcb *inp; 657 int s; 658 659 inp = sotoinpcb(so); 660 if (inp == 0) 661 return EINVAL; 662 s = splnet(); 663 in6_pcbdetach(inp); 664 splx(s); 665 return 0; 666 } 667 668 static int 669 udp6_disconnect(struct socket *so) 670 { 671 struct inpcb *inp; 672 int s; 673 674 inp = sotoinpcb(so); 675 if (inp == 0) 676 return EINVAL; 677 678 if (inp->inp_vflag & INP_IPV4) { 679 struct pr_usrreqs *pru; 680 681 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 682 return ((*pru->pru_disconnect)(so)); 683 } 684 685 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 686 return ENOTCONN; 687 688 s = splnet(); 689 in6_pcbdisconnect(inp); 690 inp->in6p_laddr = in6addr_any; 691 splx(s); 692 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 693 return 0; 694 } 695 696 static int 697 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 698 struct mbuf *control, struct proc *p) 699 { 700 struct inpcb *inp; 701 int error = 0; 702 703 inp = sotoinpcb(so); 704 if (inp == 0) { 705 error = EINVAL; 706 goto bad; 707 } 708 709 if (addr) { 710 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 711 error = EINVAL; 712 goto bad; 713 } 714 if (addr->sa_family != AF_INET6) { 715 error = EAFNOSUPPORT; 716 goto bad; 717 } 718 } 719 720 if (ip6_mapped_addr_on) { 721 int hasv4addr; 722 struct sockaddr_in6 *sin6 = 0; 723 724 if (addr == 0) 725 hasv4addr = (inp->inp_vflag & INP_IPV4); 726 else { 727 sin6 = (struct sockaddr_in6 *)addr; 728 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 729 ? 1 : 0; 730 } 731 if (hasv4addr) { 732 struct pr_usrreqs *pru; 733 734 if (sin6) 735 in6_sin6_2_sin_in_sock(addr); 736 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 737 error = ((*pru->pru_send)(so, flags, m, addr, control, 738 p)); 739 /* addr will just be freed in sendit(). */ 740 return error; 741 } 742 } 743 744 return udp6_output(inp, m, addr, control, p); 745 746 bad: 747 m_freem(m); 748 return(error); 749 } 750 751 struct pr_usrreqs udp6_usrreqs = { 752 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 753 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 754 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 755 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 756 in6_mapped_sockaddr, sosend, soreceive, sopoll 757 }; 758