1 /* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */ 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 #ifdef FAST_IPSEC 110 #include <netipsec/ipsec.h> 111 #include <netipsec/ipsec6.h> 112 #endif /* FAST_IPSEC */ 113 114 /* 115 * UDP protocol inplementation. 116 * Per RFC 768, August, 1980. 117 */ 118 119 extern struct protosw inetsw[]; 120 static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 121 static int udp6_detach __P((struct socket *so)); 122 123 static int 124 in6_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 } 145 146 int 147 udp6_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 (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 165 /* XXX send icmp6 host/port unreach? */ 166 m_freem(m); 167 return IPPROTO_DONE; 168 } 169 170 udpstat.udps_ipackets++; 171 172 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 173 uh = (struct udphdr *)((caddr_t)ip6 + off); 174 ulen = ntohs((u_short)uh->uh_ulen); 175 176 if (plen != ulen) { 177 udpstat.udps_badlen++; 178 goto bad; 179 } 180 181 /* 182 * Checksum extended UDP header and data. 183 */ 184 if (uh->uh_sum == 0) 185 udpstat.udps_nosum++; 186 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 187 udpstat.udps_badsum++; 188 goto bad; 189 } 190 191 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 192 struct inpcb *last; 193 194 /* 195 * Deliver a multicast datagram to all sockets 196 * for which the local and remote addresses and ports match 197 * those of the incoming datagram. This allows more than 198 * one process to receive multicasts on the same port. 199 * (This really ought to be done for unicast datagrams as 200 * well, but that would cause problems with existing 201 * applications that open both address-specific sockets and 202 * a wildcard socket listening to the same port -- they would 203 * end up receiving duplicates of every unicast datagram. 204 * Those applications open the multiple sockets to overcome an 205 * inadequacy of the UDP socket interface, but for backwards 206 * compatibility we avoid the problem here rather than 207 * fixing the interface. Maybe 4.5BSD will remedy this?) 208 */ 209 210 /* 211 * In a case that laddr should be set to the link-local 212 * address (this happens in RIPng), the multicast address 213 * specified in the received packet does not match with 214 * laddr. To cure this situation, the matching is relaxed 215 * if the receiving interface is the same as one specified 216 * in the socket and if the destination multicast address 217 * matches one of the multicast groups specified in the socket. 218 */ 219 220 /* 221 * Construct sockaddr format source address. 222 */ 223 init_sin6(&udp_in6, m); /* general init */ 224 udp_in6.sin6_port = uh->uh_sport; 225 /* 226 * KAME note: traditionally we dropped udpiphdr from mbuf here. 227 * We need udphdr for IPsec processing so we do that later. 228 */ 229 230 /* 231 * Locate pcb(s) for datagram. 232 * (Algorithm copied from raw_intr().) 233 */ 234 last = NULL; 235 LIST_FOREACH(in6p, &udb, inp_list) { 236 if ((in6p->inp_vflag & INP_IPV6) == 0) 237 continue; 238 if (in6p->in6p_lport != uh->uh_dport) 239 continue; 240 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 241 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 242 &ip6->ip6_dst) && 243 !in6_mcmatch(in6p, &ip6->ip6_dst, 244 m->m_pkthdr.rcvif)) 245 continue; 246 } 247 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 248 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 249 &ip6->ip6_src) || 250 in6p->in6p_fport != uh->uh_sport) 251 continue; 252 } 253 254 if (last != NULL) { 255 struct mbuf *n; 256 257 #ifdef IPSEC 258 /* 259 * Check AH/ESP integrity. 260 */ 261 if (ipsec6_in_reject_so(m, last->inp_socket)) 262 ipsec6stat.in_polvio++; 263 /* do not inject data into pcb */ 264 else 265 #endif /* IPSEC */ 266 #ifdef FAST_IPSEC 267 /* 268 * Check AH/ESP integrity. 269 */ 270 if (ipsec6_in_reject(m, last)) 271 ; 272 else 273 #endif /* FAST_IPSEC */ 274 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 275 /* 276 * KAME NOTE: do not 277 * m_copy(m, offset, ...) above. 278 * sbappendaddr() expects M_PKTHDR, 279 * and m_copy() will copy M_PKTHDR 280 * only if offset is 0. 281 */ 282 if (last->in6p_flags & IN6P_CONTROLOPTS 283 || last->in6p_socket->so_options & SO_TIMESTAMP) 284 ip6_savecontrol(last, &opts, 285 ip6, n); 286 287 m_adj(n, off + sizeof(struct udphdr)); 288 if (sbappendaddr(&last->in6p_socket->so_rcv, 289 (struct sockaddr *)&udp_in6, 290 n, opts) == 0) { 291 m_freem(n); 292 if (opts) 293 m_freem(opts); 294 udpstat.udps_fullsock++; 295 } else 296 sorwakeup(last->in6p_socket); 297 opts = NULL; 298 } 299 } 300 last = in6p; 301 /* 302 * Don't look for additional matches if this one does 303 * not have either the SO_REUSEPORT or SO_REUSEADDR 304 * socket options set. This heuristic avoids searching 305 * through all pcbs in the common case of a non-shared 306 * port. It assumes that an application will never 307 * clear these options after setting them. 308 */ 309 if ((last->in6p_socket->so_options & 310 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 311 break; 312 } 313 314 if (last == NULL) { 315 /* 316 * No matching pcb found; discard datagram. 317 * (No need to send an ICMP Port Unreachable 318 * for a broadcast or multicast datgram.) 319 */ 320 udpstat.udps_noport++; 321 udpstat.udps_noportmcast++; 322 goto bad; 323 } 324 #ifdef IPSEC 325 /* 326 * Check AH/ESP integrity. 327 */ 328 if (ipsec6_in_reject_so(m, last->inp_socket)) { 329 ipsec6stat.in_polvio++; 330 goto bad; 331 } 332 #endif /* IPSEC */ 333 #ifdef FAST_IPSEC 334 /* 335 * Check AH/ESP integrity. 336 */ 337 if (ipsec6_in_reject(m, last)) { 338 goto bad; 339 } 340 #endif /* FAST_IPSEC */ 341 if (last->in6p_flags & IN6P_CONTROLOPTS 342 || last->in6p_socket->so_options & SO_TIMESTAMP) 343 ip6_savecontrol(last, &opts, ip6, m); 344 345 m_adj(m, off + sizeof(struct udphdr)); 346 if (sbappendaddr(&last->in6p_socket->so_rcv, 347 (struct sockaddr *)&udp_in6, 348 m, opts) == 0) { 349 udpstat.udps_fullsock++; 350 goto bad; 351 } 352 sorwakeup(last->in6p_socket); 353 return IPPROTO_DONE; 354 } 355 /* 356 * Locate pcb for datagram. 357 */ 358 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 359 &ip6->ip6_dst, uh->uh_dport, 1, 360 m->m_pkthdr.rcvif); 361 if (in6p == 0) { 362 if (log_in_vain) { 363 char buf[INET6_ADDRSTRLEN]; 364 365 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 366 log(LOG_INFO, 367 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 368 buf, ntohs(uh->uh_dport), 369 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 370 } 371 udpstat.udps_noport++; 372 if (m->m_flags & M_MCAST) { 373 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 374 udpstat.udps_noportmcast++; 375 goto bad; 376 } 377 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 378 return IPPROTO_DONE; 379 } 380 #ifdef IPSEC 381 /* 382 * Check AH/ESP integrity. 383 */ 384 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 385 ipsec6stat.in_polvio++; 386 goto bad; 387 } 388 #endif /* IPSEC */ 389 #ifdef FAST_IPSEC 390 /* 391 * Check AH/ESP integrity. 392 */ 393 if (ipsec6_in_reject(m, in6p)) { 394 goto bad; 395 } 396 #endif /* FAST_IPSEC */ 397 398 /* 399 * Construct sockaddr format source address. 400 * Stuff source address and datagram in user buffer. 401 */ 402 init_sin6(&udp_in6, m); /* general init */ 403 udp_in6.sin6_port = uh->uh_sport; 404 if (in6p->in6p_flags & IN6P_CONTROLOPTS 405 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 406 ip6_savecontrol(in6p, &opts, ip6, m); 407 m_adj(m, off + sizeof(struct udphdr)); 408 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 409 (struct sockaddr *)&udp_in6, 410 m, opts) == 0) { 411 udpstat.udps_fullsock++; 412 goto bad; 413 } 414 sorwakeup(in6p->in6p_socket); 415 return IPPROTO_DONE; 416 bad: 417 if (m) 418 m_freem(m); 419 if (opts) 420 m_freem(opts); 421 return IPPROTO_DONE; 422 } 423 424 void 425 udp6_ctlinput(cmd, sa, d) 426 int cmd; 427 struct sockaddr *sa; 428 void *d; 429 { 430 struct udphdr uh; 431 struct ip6_hdr *ip6; 432 struct mbuf *m; 433 int off = 0; 434 struct ip6ctlparam *ip6cp = NULL; 435 const struct sockaddr_in6 *sa6_src = NULL; 436 void (*notify) __P((struct inpcb *, int)) = udp_notify; 437 struct udp_portonly { 438 u_int16_t uh_sport; 439 u_int16_t uh_dport; 440 } *uhp; 441 442 if (sa->sa_family != AF_INET6 || 443 sa->sa_len != sizeof(struct sockaddr_in6)) 444 return; 445 446 if ((unsigned)cmd >= PRC_NCMDS) 447 return; 448 if (PRC_IS_REDIRECT(cmd)) 449 notify = in6_rtchange, d = NULL; 450 else if (cmd == PRC_HOSTDEAD) 451 d = NULL; 452 else if (inet6ctlerrmap[cmd] == 0) 453 return; 454 455 /* if the parameter is from icmp6, decode it. */ 456 if (d != NULL) { 457 ip6cp = (struct ip6ctlparam *)d; 458 m = ip6cp->ip6c_m; 459 ip6 = ip6cp->ip6c_ip6; 460 off = ip6cp->ip6c_off; 461 sa6_src = ip6cp->ip6c_src; 462 } else { 463 m = NULL; 464 ip6 = NULL; 465 sa6_src = &sa6_any; 466 } 467 468 if (ip6) { 469 /* 470 * XXX: We assume that when IPV6 is non NULL, 471 * M and OFF are valid. 472 */ 473 474 /* check if we can safely examine src and dst ports */ 475 if (m->m_pkthdr.len < off + sizeof(*uhp)) 476 return; 477 478 bzero(&uh, sizeof(uh)); 479 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 480 481 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 482 (struct sockaddr *)ip6cp->ip6c_src, 483 uh.uh_sport, cmd, notify); 484 } else 485 (void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)sa6_src, 486 0, cmd, notify); 487 } 488 489 static int 490 udp6_getcred(SYSCTL_HANDLER_ARGS) 491 { 492 struct sockaddr_in6 addrs[2]; 493 struct inpcb *inp; 494 int error, s; 495 496 error = suser(req->p); 497 if (error) 498 return (error); 499 500 if (req->newlen != sizeof(addrs)) 501 return (EINVAL); 502 if (req->oldlen != sizeof(struct ucred)) 503 return (EINVAL); 504 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 505 if (error) 506 return (error); 507 s = splnet(); 508 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 509 addrs[1].sin6_port, 510 &addrs[0].sin6_addr, addrs[0].sin6_port, 511 1, NULL); 512 if (!inp || !inp->inp_socket) { 513 error = ENOENT; 514 goto out; 515 } 516 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 517 sizeof(struct ucred)); 518 519 out: 520 splx(s); 521 return (error); 522 } 523 524 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 525 0, 0, 526 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 527 528 static int 529 udp6_abort(struct socket *so) 530 { 531 struct inpcb *inp; 532 int s; 533 534 inp = sotoinpcb(so); 535 if (inp == 0) 536 return EINVAL; /* ??? possible? panic instead? */ 537 soisdisconnected(so); 538 s = splnet(); 539 in6_pcbdetach(inp); 540 splx(s); 541 return 0; 542 } 543 544 static int 545 udp6_attach(struct socket *so, int proto, struct proc *p) 546 { 547 struct inpcb *inp; 548 int s, error; 549 550 inp = sotoinpcb(so); 551 if (inp != 0) 552 return EINVAL; 553 554 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 555 error = soreserve(so, udp_sendspace, udp_recvspace); 556 if (error) 557 return error; 558 } 559 s = splnet(); 560 error = in_pcballoc(so, &udbinfo, p); 561 splx(s); 562 if (error) 563 return error; 564 inp = (struct inpcb *)so->so_pcb; 565 inp->inp_vflag |= INP_IPV6; 566 if (!ip6_v6only) 567 inp->inp_vflag |= INP_IPV4; 568 inp->in6p_hops = -1; /* use kernel default */ 569 inp->in6p_cksum = -1; /* just to be sure */ 570 /* 571 * XXX: ugly!! 572 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 573 * because the socket may be bound to an IPv6 wildcard address, 574 * which may match an IPv4-mapped IPv6 address. 575 */ 576 inp->inp_ip_ttl = ip_defttl; 577 return 0; 578 } 579 580 static int 581 udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 582 { 583 struct inpcb *inp; 584 int s, error; 585 586 inp = sotoinpcb(so); 587 if (inp == 0) 588 return EINVAL; 589 590 inp->inp_vflag &= ~INP_IPV4; 591 inp->inp_vflag |= INP_IPV6; 592 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 593 struct sockaddr_in6 *sin6_p; 594 595 sin6_p = (struct sockaddr_in6 *)nam; 596 597 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 598 inp->inp_vflag |= INP_IPV4; 599 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 600 struct sockaddr_in sin; 601 602 in6_sin6_2_sin(&sin, sin6_p); 603 inp->inp_vflag |= INP_IPV4; 604 inp->inp_vflag &= ~INP_IPV6; 605 s = splnet(); 606 error = in_pcbbind(inp, (struct sockaddr *)&sin, p); 607 splx(s); 608 return error; 609 } 610 } 611 612 s = splnet(); 613 error = in6_pcbbind(inp, nam, p); 614 splx(s); 615 return error; 616 } 617 618 static int 619 udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 620 { 621 struct inpcb *inp; 622 int s, error; 623 624 inp = sotoinpcb(so); 625 if (inp == 0) 626 return EINVAL; 627 628 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 629 struct sockaddr_in6 *sin6_p; 630 631 sin6_p = (struct sockaddr_in6 *)nam; 632 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 633 struct sockaddr_in sin; 634 635 if (inp->inp_faddr.s_addr != INADDR_ANY) 636 return EISCONN; 637 in6_sin6_2_sin(&sin, sin6_p); 638 s = splnet(); 639 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); 640 splx(s); 641 if (error == 0) { 642 inp->inp_vflag |= INP_IPV4; 643 inp->inp_vflag &= ~INP_IPV6; 644 soisconnected(so); 645 } 646 return error; 647 } 648 } 649 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 650 return EISCONN; 651 s = splnet(); 652 error = in6_pcbconnect(inp, nam, p); 653 splx(s); 654 if (error == 0) { 655 if (!ip6_v6only) { /* should be non mapped addr */ 656 inp->inp_vflag &= ~INP_IPV4; 657 inp->inp_vflag |= INP_IPV6; 658 } 659 soisconnected(so); 660 } 661 return error; 662 } 663 664 static int 665 udp6_detach(struct socket *so) 666 { 667 struct inpcb *inp; 668 int s; 669 670 inp = sotoinpcb(so); 671 if (inp == 0) 672 return EINVAL; 673 s = splnet(); 674 in6_pcbdetach(inp); 675 splx(s); 676 return 0; 677 } 678 679 static int 680 udp6_disconnect(struct socket *so) 681 { 682 struct inpcb *inp; 683 int s; 684 685 inp = sotoinpcb(so); 686 if (inp == 0) 687 return EINVAL; 688 689 if (inp->inp_vflag & INP_IPV4) { 690 struct pr_usrreqs *pru; 691 692 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 693 return ((*pru->pru_disconnect)(so)); 694 } 695 696 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 697 return ENOTCONN; 698 699 s = splnet(); 700 in6_pcbdisconnect(inp); 701 inp->in6p_laddr = in6addr_any; 702 splx(s); 703 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 704 return 0; 705 } 706 707 static int 708 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 709 struct mbuf *control, struct proc *p) 710 { 711 struct inpcb *inp; 712 int error = 0; 713 714 inp = sotoinpcb(so); 715 if (inp == 0) { 716 error = EINVAL; 717 goto bad; 718 } 719 720 if (addr) { 721 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 722 error = EINVAL; 723 goto bad; 724 } 725 if (addr->sa_family != AF_INET6) { 726 error = EAFNOSUPPORT; 727 goto bad; 728 } 729 } 730 731 if (!ip6_v6only) { 732 int hasv4addr; 733 struct sockaddr_in6 *sin6 = 0; 734 735 if (addr == 0) 736 hasv4addr = (inp->inp_vflag & INP_IPV4); 737 else { 738 sin6 = (struct sockaddr_in6 *)addr; 739 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 740 ? 1 : 0; 741 } 742 if (hasv4addr) { 743 struct pr_usrreqs *pru; 744 745 if (sin6) 746 in6_sin6_2_sin_in_sock(addr); 747 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 748 error = ((*pru->pru_send)(so, flags, m, addr, control, 749 p)); 750 /* addr will just be freed in sendit(). */ 751 return error; 752 } 753 } 754 755 return udp6_output(inp, m, addr, control, p); 756 757 bad: 758 m_freem(m); 759 return(error); 760 } 761 762 struct pr_usrreqs udp6_usrreqs = { 763 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 764 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 765 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 766 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 767 in6_mapped_sockaddr, sosend, soreceive, sopoll 768 }; 769