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 1.2 2003/06/17 04:28:53 dillon 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 <netipsec/ipsec.h> 112 #include <netipsec/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 __P((struct inpcb *, struct in6_addr *, struct ifnet *)); 122 static int udp6_detach __P((struct socket *so)); 123 124 static int 125 in6_mcmatch(in6p, ia6, ifp) 126 struct inpcb *in6p; 127 register 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(mp, offp, proto) 149 struct mbuf **mp; 150 int *offp, proto; 151 { 152 struct mbuf *m = *mp; 153 register struct ip6_hdr *ip6; 154 register struct udphdr *uh; 155 register struct inpcb *in6p; 156 struct mbuf *opts = NULL; 157 int off = *offp; 158 int plen, ulen; 159 struct sockaddr_in6 udp_in6; 160 161 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 162 163 ip6 = mtod(m, struct ip6_hdr *); 164 165 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 166 /* XXX send icmp6 host/port unreach? */ 167 m_freem(m); 168 return IPPROTO_DONE; 169 } 170 171 udpstat.udps_ipackets++; 172 173 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 174 uh = (struct udphdr *)((caddr_t)ip6 + off); 175 ulen = ntohs((u_short)uh->uh_ulen); 176 177 if (plen != ulen) { 178 udpstat.udps_badlen++; 179 goto bad; 180 } 181 182 /* 183 * Checksum extended UDP header and data. 184 */ 185 if (uh->uh_sum == 0) 186 udpstat.udps_nosum++; 187 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 188 udpstat.udps_badsum++; 189 goto bad; 190 } 191 192 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 193 struct inpcb *last; 194 195 /* 196 * Deliver a multicast datagram to all sockets 197 * for which the local and remote addresses and ports match 198 * those of the incoming datagram. This allows more than 199 * one process to receive multicasts on the same port. 200 * (This really ought to be done for unicast datagrams as 201 * well, but that would cause problems with existing 202 * applications that open both address-specific sockets and 203 * a wildcard socket listening to the same port -- they would 204 * end up receiving duplicates of every unicast datagram. 205 * Those applications open the multiple sockets to overcome an 206 * inadequacy of the UDP socket interface, but for backwards 207 * compatibility we avoid the problem here rather than 208 * fixing the interface. Maybe 4.5BSD will remedy this?) 209 */ 210 211 /* 212 * In a case that laddr should be set to the link-local 213 * address (this happens in RIPng), the multicast address 214 * specified in the received packet does not match with 215 * laddr. To cure this situation, the matching is relaxed 216 * if the receiving interface is the same as one specified 217 * in the socket and if the destination multicast address 218 * matches one of the multicast groups specified in the socket. 219 */ 220 221 /* 222 * Construct sockaddr format source address. 223 */ 224 init_sin6(&udp_in6, m); /* general init */ 225 udp_in6.sin6_port = uh->uh_sport; 226 /* 227 * KAME note: traditionally we dropped udpiphdr from mbuf here. 228 * We need udphdr for IPsec processing so we do that later. 229 */ 230 231 /* 232 * Locate pcb(s) for datagram. 233 * (Algorithm copied from raw_intr().) 234 */ 235 last = NULL; 236 LIST_FOREACH(in6p, &udb, inp_list) { 237 if ((in6p->inp_vflag & INP_IPV6) == 0) 238 continue; 239 if (in6p->in6p_lport != uh->uh_dport) 240 continue; 241 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 242 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 243 &ip6->ip6_dst) && 244 !in6_mcmatch(in6p, &ip6->ip6_dst, 245 m->m_pkthdr.rcvif)) 246 continue; 247 } 248 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 249 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 250 &ip6->ip6_src) || 251 in6p->in6p_fport != uh->uh_sport) 252 continue; 253 } 254 255 if (last != NULL) { 256 struct mbuf *n; 257 258 #ifdef IPSEC 259 /* 260 * Check AH/ESP integrity. 261 */ 262 if (ipsec6_in_reject_so(m, last->inp_socket)) 263 ipsec6stat.in_polvio++; 264 /* do not inject data into pcb */ 265 else 266 #endif /* IPSEC */ 267 #ifdef FAST_IPSEC 268 /* 269 * Check AH/ESP integrity. 270 */ 271 if (ipsec6_in_reject(m, last)) 272 ; 273 else 274 #endif /* FAST_IPSEC */ 275 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 276 /* 277 * KAME NOTE: do not 278 * m_copy(m, offset, ...) above. 279 * sbappendaddr() expects M_PKTHDR, 280 * and m_copy() will copy M_PKTHDR 281 * only if offset is 0. 282 */ 283 if (last->in6p_flags & IN6P_CONTROLOPTS 284 || last->in6p_socket->so_options & SO_TIMESTAMP) 285 ip6_savecontrol(last, &opts, 286 ip6, n); 287 288 m_adj(n, off + sizeof(struct udphdr)); 289 if (sbappendaddr(&last->in6p_socket->so_rcv, 290 (struct sockaddr *)&udp_in6, 291 n, opts) == 0) { 292 m_freem(n); 293 if (opts) 294 m_freem(opts); 295 udpstat.udps_fullsock++; 296 } else 297 sorwakeup(last->in6p_socket); 298 opts = NULL; 299 } 300 } 301 last = in6p; 302 /* 303 * Don't look for additional matches if this one does 304 * not have either the SO_REUSEPORT or SO_REUSEADDR 305 * socket options set. This heuristic avoids searching 306 * through all pcbs in the common case of a non-shared 307 * port. It assumes that an application will never 308 * clear these options after setting them. 309 */ 310 if ((last->in6p_socket->so_options & 311 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 312 break; 313 } 314 315 if (last == NULL) { 316 /* 317 * No matching pcb found; discard datagram. 318 * (No need to send an ICMP Port Unreachable 319 * for a broadcast or multicast datgram.) 320 */ 321 udpstat.udps_noport++; 322 udpstat.udps_noportmcast++; 323 goto bad; 324 } 325 #ifdef IPSEC 326 /* 327 * Check AH/ESP integrity. 328 */ 329 if (ipsec6_in_reject_so(m, last->inp_socket)) { 330 ipsec6stat.in_polvio++; 331 goto bad; 332 } 333 #endif /* IPSEC */ 334 #ifdef FAST_IPSEC 335 /* 336 * Check AH/ESP integrity. 337 */ 338 if (ipsec6_in_reject(m, last)) { 339 goto bad; 340 } 341 #endif /* FAST_IPSEC */ 342 if (last->in6p_flags & IN6P_CONTROLOPTS 343 || last->in6p_socket->so_options & SO_TIMESTAMP) 344 ip6_savecontrol(last, &opts, ip6, m); 345 346 m_adj(m, off + sizeof(struct udphdr)); 347 if (sbappendaddr(&last->in6p_socket->so_rcv, 348 (struct sockaddr *)&udp_in6, 349 m, opts) == 0) { 350 udpstat.udps_fullsock++; 351 goto bad; 352 } 353 sorwakeup(last->in6p_socket); 354 return IPPROTO_DONE; 355 } 356 /* 357 * Locate pcb for datagram. 358 */ 359 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 360 &ip6->ip6_dst, uh->uh_dport, 1, 361 m->m_pkthdr.rcvif); 362 if (in6p == 0) { 363 if (log_in_vain) { 364 char buf[INET6_ADDRSTRLEN]; 365 366 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 367 log(LOG_INFO, 368 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 369 buf, ntohs(uh->uh_dport), 370 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 371 } 372 udpstat.udps_noport++; 373 if (m->m_flags & M_MCAST) { 374 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 375 udpstat.udps_noportmcast++; 376 goto bad; 377 } 378 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 379 return IPPROTO_DONE; 380 } 381 #ifdef IPSEC 382 /* 383 * Check AH/ESP integrity. 384 */ 385 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 386 ipsec6stat.in_polvio++; 387 goto bad; 388 } 389 #endif /* IPSEC */ 390 #ifdef FAST_IPSEC 391 /* 392 * Check AH/ESP integrity. 393 */ 394 if (ipsec6_in_reject(m, in6p)) { 395 goto bad; 396 } 397 #endif /* FAST_IPSEC */ 398 399 /* 400 * Construct sockaddr format source address. 401 * Stuff source address and datagram in user buffer. 402 */ 403 init_sin6(&udp_in6, m); /* general init */ 404 udp_in6.sin6_port = uh->uh_sport; 405 if (in6p->in6p_flags & IN6P_CONTROLOPTS 406 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 407 ip6_savecontrol(in6p, &opts, ip6, m); 408 m_adj(m, off + sizeof(struct udphdr)); 409 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 410 (struct sockaddr *)&udp_in6, 411 m, opts) == 0) { 412 udpstat.udps_fullsock++; 413 goto bad; 414 } 415 sorwakeup(in6p->in6p_socket); 416 return IPPROTO_DONE; 417 bad: 418 if (m) 419 m_freem(m); 420 if (opts) 421 m_freem(opts); 422 return IPPROTO_DONE; 423 } 424 425 void 426 udp6_ctlinput(cmd, sa, d) 427 int cmd; 428 struct sockaddr *sa; 429 void *d; 430 { 431 struct udphdr uh; 432 struct ip6_hdr *ip6; 433 struct mbuf *m; 434 int off = 0; 435 struct ip6ctlparam *ip6cp = NULL; 436 const struct sockaddr_in6 *sa6_src = NULL; 437 void (*notify) __P((struct inpcb *, int)) = udp_notify; 438 struct udp_portonly { 439 u_int16_t uh_sport; 440 u_int16_t uh_dport; 441 } *uhp; 442 443 if (sa->sa_family != AF_INET6 || 444 sa->sa_len != sizeof(struct sockaddr_in6)) 445 return; 446 447 if ((unsigned)cmd >= PRC_NCMDS) 448 return; 449 if (PRC_IS_REDIRECT(cmd)) 450 notify = in6_rtchange, d = NULL; 451 else if (cmd == PRC_HOSTDEAD) 452 d = NULL; 453 else if (inet6ctlerrmap[cmd] == 0) 454 return; 455 456 /* if the parameter is from icmp6, decode it. */ 457 if (d != NULL) { 458 ip6cp = (struct ip6ctlparam *)d; 459 m = ip6cp->ip6c_m; 460 ip6 = ip6cp->ip6c_ip6; 461 off = ip6cp->ip6c_off; 462 sa6_src = ip6cp->ip6c_src; 463 } else { 464 m = NULL; 465 ip6 = NULL; 466 sa6_src = &sa6_any; 467 } 468 469 if (ip6) { 470 /* 471 * XXX: We assume that when IPV6 is non NULL, 472 * M and OFF are valid. 473 */ 474 475 /* check if we can safely examine src and dst ports */ 476 if (m->m_pkthdr.len < off + sizeof(*uhp)) 477 return; 478 479 bzero(&uh, sizeof(uh)); 480 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 481 482 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 483 (struct sockaddr *)ip6cp->ip6c_src, 484 uh.uh_sport, cmd, notify); 485 } else 486 (void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)sa6_src, 487 0, cmd, notify); 488 } 489 490 static int 491 udp6_getcred(SYSCTL_HANDLER_ARGS) 492 { 493 struct sockaddr_in6 addrs[2]; 494 struct inpcb *inp; 495 int error, s; 496 497 error = suser(req->p); 498 if (error) 499 return (error); 500 501 if (req->newlen != sizeof(addrs)) 502 return (EINVAL); 503 if (req->oldlen != sizeof(struct ucred)) 504 return (EINVAL); 505 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 506 if (error) 507 return (error); 508 s = splnet(); 509 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 510 addrs[1].sin6_port, 511 &addrs[0].sin6_addr, addrs[0].sin6_port, 512 1, NULL); 513 if (!inp || !inp->inp_socket) { 514 error = ENOENT; 515 goto out; 516 } 517 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 518 sizeof(struct ucred)); 519 520 out: 521 splx(s); 522 return (error); 523 } 524 525 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 526 0, 0, 527 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 528 529 static int 530 udp6_abort(struct socket *so) 531 { 532 struct inpcb *inp; 533 int s; 534 535 inp = sotoinpcb(so); 536 if (inp == 0) 537 return EINVAL; /* ??? possible? panic instead? */ 538 soisdisconnected(so); 539 s = splnet(); 540 in6_pcbdetach(inp); 541 splx(s); 542 return 0; 543 } 544 545 static int 546 udp6_attach(struct socket *so, int proto, struct proc *p) 547 { 548 struct inpcb *inp; 549 int s, error; 550 551 inp = sotoinpcb(so); 552 if (inp != 0) 553 return EINVAL; 554 555 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 556 error = soreserve(so, udp_sendspace, udp_recvspace); 557 if (error) 558 return error; 559 } 560 s = splnet(); 561 error = in_pcballoc(so, &udbinfo, p); 562 splx(s); 563 if (error) 564 return error; 565 inp = (struct inpcb *)so->so_pcb; 566 inp->inp_vflag |= INP_IPV6; 567 if (!ip6_v6only) 568 inp->inp_vflag |= INP_IPV4; 569 inp->in6p_hops = -1; /* use kernel default */ 570 inp->in6p_cksum = -1; /* just to be sure */ 571 /* 572 * XXX: ugly!! 573 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 574 * because the socket may be bound to an IPv6 wildcard address, 575 * which may match an IPv4-mapped IPv6 address. 576 */ 577 inp->inp_ip_ttl = ip_defttl; 578 return 0; 579 } 580 581 static int 582 udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 583 { 584 struct inpcb *inp; 585 int s, error; 586 587 inp = sotoinpcb(so); 588 if (inp == 0) 589 return EINVAL; 590 591 inp->inp_vflag &= ~INP_IPV4; 592 inp->inp_vflag |= INP_IPV6; 593 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 594 struct sockaddr_in6 *sin6_p; 595 596 sin6_p = (struct sockaddr_in6 *)nam; 597 598 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 599 inp->inp_vflag |= INP_IPV4; 600 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 601 struct sockaddr_in sin; 602 603 in6_sin6_2_sin(&sin, sin6_p); 604 inp->inp_vflag |= INP_IPV4; 605 inp->inp_vflag &= ~INP_IPV6; 606 s = splnet(); 607 error = in_pcbbind(inp, (struct sockaddr *)&sin, p); 608 splx(s); 609 return error; 610 } 611 } 612 613 s = splnet(); 614 error = in6_pcbbind(inp, nam, p); 615 splx(s); 616 return error; 617 } 618 619 static int 620 udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 621 { 622 struct inpcb *inp; 623 int s, error; 624 625 inp = sotoinpcb(so); 626 if (inp == 0) 627 return EINVAL; 628 629 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 630 struct sockaddr_in6 *sin6_p; 631 632 sin6_p = (struct sockaddr_in6 *)nam; 633 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 634 struct sockaddr_in sin; 635 636 if (inp->inp_faddr.s_addr != INADDR_ANY) 637 return EISCONN; 638 in6_sin6_2_sin(&sin, sin6_p); 639 s = splnet(); 640 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); 641 splx(s); 642 if (error == 0) { 643 inp->inp_vflag |= INP_IPV4; 644 inp->inp_vflag &= ~INP_IPV6; 645 soisconnected(so); 646 } 647 return error; 648 } 649 } 650 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 651 return EISCONN; 652 s = splnet(); 653 error = in6_pcbconnect(inp, nam, p); 654 splx(s); 655 if (error == 0) { 656 if (!ip6_v6only) { /* should be non mapped addr */ 657 inp->inp_vflag &= ~INP_IPV4; 658 inp->inp_vflag |= INP_IPV6; 659 } 660 soisconnected(so); 661 } 662 return error; 663 } 664 665 static int 666 udp6_detach(struct socket *so) 667 { 668 struct inpcb *inp; 669 int s; 670 671 inp = sotoinpcb(so); 672 if (inp == 0) 673 return EINVAL; 674 s = splnet(); 675 in6_pcbdetach(inp); 676 splx(s); 677 return 0; 678 } 679 680 static int 681 udp6_disconnect(struct socket *so) 682 { 683 struct inpcb *inp; 684 int s; 685 686 inp = sotoinpcb(so); 687 if (inp == 0) 688 return EINVAL; 689 690 if (inp->inp_vflag & INP_IPV4) { 691 struct pr_usrreqs *pru; 692 693 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 694 return ((*pru->pru_disconnect)(so)); 695 } 696 697 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 698 return ENOTCONN; 699 700 s = splnet(); 701 in6_pcbdisconnect(inp); 702 inp->in6p_laddr = in6addr_any; 703 splx(s); 704 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 705 return 0; 706 } 707 708 static int 709 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 710 struct mbuf *control, struct proc *p) 711 { 712 struct inpcb *inp; 713 int error = 0; 714 715 inp = sotoinpcb(so); 716 if (inp == 0) { 717 error = EINVAL; 718 goto bad; 719 } 720 721 if (addr) { 722 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 723 error = EINVAL; 724 goto bad; 725 } 726 if (addr->sa_family != AF_INET6) { 727 error = EAFNOSUPPORT; 728 goto bad; 729 } 730 } 731 732 if (!ip6_v6only) { 733 int hasv4addr; 734 struct sockaddr_in6 *sin6 = 0; 735 736 if (addr == 0) 737 hasv4addr = (inp->inp_vflag & INP_IPV4); 738 else { 739 sin6 = (struct sockaddr_in6 *)addr; 740 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 741 ? 1 : 0; 742 } 743 if (hasv4addr) { 744 struct pr_usrreqs *pru; 745 746 if (sin6) 747 in6_sin6_2_sin_in_sock(addr); 748 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 749 error = ((*pru->pru_send)(so, flags, m, addr, control, 750 p)); 751 /* addr will just be freed in sendit(). */ 752 return error; 753 } 754 } 755 756 return udp6_output(inp, m, addr, control, p); 757 758 bad: 759 m_freem(m); 760 return(error); 761 } 762 763 struct pr_usrreqs udp6_usrreqs = { 764 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 765 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 766 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 767 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 768 in6_mapped_sockaddr, sosend, soreceive, sopoll 769 }; 770