Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/bsd/netinet6/udp6_usrreq.c
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1 /* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.6 2001/07/29 19:32:40 ume 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 <sys/param.h> 69 #include <sys/kernel.h> 70 #include <sys/malloc.h> 71 #include <sys/mbuf.h> 72 #include <sys/protosw.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/sysctl.h> 76 #include <sys/errno.h> 77 #include <sys/stat.h> 78 #include <sys/systm.h> 79 #include <sys/syslog.h> 80 #include <sys/proc.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/if_types.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/in_var.h> 91 #include <netinet/ip_var.h> 92 #include <netinet/udp.h> 93 #include <netinet/udp_var.h> 94 #include <netinet/ip6.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet6/in6_pcb.h> 97 #include <netinet/icmp6.h> 98 #include <netinet6/udp6_var.h> 99 #include <netinet6/ip6protosw.h> 100 101 #if IPSEC 102 #include <netinet6/ipsec.h> 103 #include <netinet6/ipsec6.h> 104 extern int ipsec_bypass; 105 #endif /*IPSEC*/ 106 107 #include "faith.h" 108 #if defined(NFAITH) && NFAITH > 0 109 #include <net/if_faith.h> 110 #endif 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) 146 struct mbuf **mp; 147 int *offp; 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 defined(NFAITH) && 0 < NFAITH 163 if (faithprefix(&ip6->ip6_dst)) { 164 /* XXX send icmp6 host/port unreach? */ 165 m_freem(m); 166 return IPPROTO_DONE; 167 } 168 #endif 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 #ifndef __APPLE__ 185 if (uh->uh_sum == 0) 186 udpstat.udps_nosum++; 187 #endif 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 #if IPSEC 260 /* 261 * Check AH/ESP integrity. 262 */ 263 if (ipsec_bypass == 0 && 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 #ifndef __APPLE__ 316 udpstat.udps_noportmcast++; 317 #endif 318 goto bad; 319 } 320 #if IPSEC 321 /* 322 * Check AH/ESP integrity. 323 */ 324 if (ipsec_bypass == 0 && ipsec6_in_reject_so(m, last->inp_socket)) { 325 ipsec6stat.in_polvio++; 326 goto bad; 327 } 328 #endif /*IPSEC*/ 329 if (last->in6p_flags & IN6P_CONTROLOPTS 330 || last->in6p_socket->so_options & SO_TIMESTAMP) 331 ip6_savecontrol(last, &opts, ip6, m); 332 333 m_adj(m, off + sizeof(struct udphdr)); 334 if (sbappendaddr(&last->in6p_socket->so_rcv, 335 (struct sockaddr *)&udp_in6, 336 m, opts) == 0) { 337 udpstat.udps_fullsock++; 338 goto bad; 339 } 340 sorwakeup(last->in6p_socket); 341 return IPPROTO_DONE; 342 } 343 /* 344 * Locate pcb for datagram. 345 */ 346 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 347 &ip6->ip6_dst, uh->uh_dport, 1, 348 m->m_pkthdr.rcvif); 349 if (in6p == 0) { 350 if (log_in_vain) { 351 char buf[INET6_ADDRSTRLEN]; 352 353 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 354 log(LOG_INFO, 355 "Connection attempt to UDP %s:%d from %s:%d\n", 356 buf, ntohs(uh->uh_dport), 357 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 358 } 359 udpstat.udps_noport++; 360 if (m->m_flags & M_MCAST) { 361 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 362 #ifndef __APPLE__ 363 udpstat.udps_noportmcast++; 364 #endif 365 goto bad; 366 } 367 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 368 return IPPROTO_DONE; 369 } 370 #if IPSEC 371 /* 372 * Check AH/ESP integrity. 373 */ 374 if (ipsec_bypass == 0 && ipsec6_in_reject_so(m, in6p->in6p_socket)) { 375 ipsec6stat.in_polvio++; 376 goto bad; 377 } 378 #endif /*IPSEC*/ 379 380 /* 381 * Construct sockaddr format source address. 382 * Stuff source address and datagram in user buffer. 383 */ 384 init_sin6(&udp_in6, m); /* general init */ 385 udp_in6.sin6_port = uh->uh_sport; 386 if (in6p->in6p_flags & IN6P_CONTROLOPTS 387 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 388 ip6_savecontrol(in6p, &opts, ip6, m); 389 m_adj(m, off + sizeof(struct udphdr)); 390 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 391 (struct sockaddr *)&udp_in6, 392 m, opts) == 0) { 393 udpstat.udps_fullsock++; 394 goto bad; 395 } 396 sorwakeup(in6p->in6p_socket); 397 return IPPROTO_DONE; 398 bad: 399 if (m) 400 m_freem(m); 401 if (opts) 402 m_freem(opts); 403 return IPPROTO_DONE; 404 } 405 406 void 407 udp6_ctlinput(cmd, sa, d) 408 int cmd; 409 struct sockaddr *sa; 410 void *d; 411 { 412 struct udphdr uh; 413 struct ip6_hdr *ip6; 414 struct mbuf *m; 415 int off = 0; 416 struct ip6ctlparam *ip6cp = NULL; 417 const struct sockaddr_in6 *sa6_src = NULL; 418 void (*notify) __P((struct inpcb *, int)) = udp_notify; 419 struct udp_portonly { 420 u_int16_t uh_sport; 421 u_int16_t uh_dport; 422 } *uhp; 423 424 if (sa->sa_family != AF_INET6 || 425 sa->sa_len != sizeof(struct sockaddr_in6)) 426 return; 427 428 if ((unsigned)cmd >= PRC_NCMDS) 429 return; 430 if (PRC_IS_REDIRECT(cmd)) 431 notify = in6_rtchange, d = NULL; 432 else if (cmd == PRC_HOSTDEAD) 433 d = NULL; 434 else if (inet6ctlerrmap[cmd] == 0) 435 return; 436 437 /* if the parameter is from icmp6, decode it. */ 438 if (d != NULL) { 439 ip6cp = (struct ip6ctlparam *)d; 440 m = ip6cp->ip6c_m; 441 ip6 = ip6cp->ip6c_ip6; 442 off = ip6cp->ip6c_off; 443 sa6_src = ip6cp->ip6c_src; 444 } else { 445 m = NULL; 446 ip6 = NULL; 447 sa6_src = &sa6_any; 448 } 449 450 if (ip6) { 451 /* 452 * XXX: We assume that when IPV6 is non NULL, 453 * M and OFF are valid. 454 */ 455 456 /* check if we can safely examine src and dst ports */ 457 if (m->m_pkthdr.len < off + sizeof(*uhp)) 458 return; 459 460 bzero(&uh, sizeof(uh)); 461 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 462 463 (void) in6_pcbnotify(&udb, sa, uh.uh_dport, 464 (struct sockaddr*)ip6cp->ip6c_src, 465 uh.uh_sport, cmd, notify); 466 } else 467 (void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)&sa6_src, 468 0, cmd, notify); 469 } 470 471 #ifndef __APPLE__ 472 static int 473 udp6_getcred SYSCTL_HANDLER_ARGS 474 { 475 struct sockaddr_in6 addrs[2]; 476 struct inpcb *inp; 477 int error, s; 478 479 error = suser(req->p->p_ucred, &req->p->p_acflag); 480 if (error) 481 return (error); 482 483 if (req->newlen != sizeof(addrs)) 484 return (EINVAL); 485 if (req->oldlen != sizeof(struct ucred)) 486 return (EINVAL); 487 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 488 if (error) 489 return (error); 490 s = splnet(); 491 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 492 addrs[1].sin6_port, 493 &addrs[0].sin6_addr, addrs[0].sin6_port, 494 1, NULL); 495 if (!inp || !inp->inp_socket || !inp->inp_socket->so_cred) { 496 error = ENOENT; 497 goto out; 498 } 499 error = SYSCTL_OUT(req, inp->inp_socket->so_cred->pc_ucred, 500 sizeof(struct ucred)); 501 502 out: 503 splx(s); 504 return (error); 505 } 506 507 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 508 0, 0, 509 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 510 #endif 511 512 static int 513 udp6_abort(struct socket *so) 514 { 515 struct inpcb *inp; 516 int s; 517 518 inp = sotoinpcb(so); 519 if (inp == 0) 520 return EINVAL; /* ??? possible? panic instead? */ 521 soisdisconnected(so); 522 s = splnet(); 523 in6_pcbdetach(inp); 524 splx(s); 525 return 0; 526 } 527 528 static int 529 udp6_attach(struct socket *so, int proto, struct proc *p) 530 { 531 struct inpcb *inp; 532 int s, error; 533 534 inp = sotoinpcb(so); 535 if (inp != 0) 536 return EINVAL; 537 538 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 539 error = soreserve(so, udp_sendspace, udp_recvspace); 540 if (error) 541 return error; 542 } 543 s = splnet(); 544 error = in_pcballoc(so, &udbinfo, p); 545 splx(s); 546 if (error) 547 return error; 548 inp = (struct inpcb *)so->so_pcb; 549 inp->inp_vflag |= INP_IPV6; 550 if (ip6_mapped_addr_on) 551 inp->inp_vflag |= INP_IPV4; 552 inp->in6p_hops = -1; /* use kernel default */ 553 inp->in6p_cksum = -1; /* just to be sure */ 554 /* 555 * XXX: ugly!! 556 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 557 * because the socket may be bound to an IPv6 wildcard address, 558 * which may match an IPv4-mapped IPv6 address. 559 */ 560 inp->inp_ip_ttl = ip_defttl; 561 return 0; 562 } 563 564 static int 565 udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 566 { 567 struct inpcb *inp; 568 int s, error; 569 570 inp = sotoinpcb(so); 571 if (inp == 0) 572 return EINVAL; 573 574 inp->inp_vflag &= ~INP_IPV4; 575 inp->inp_vflag |= INP_IPV6; 576 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 577 struct sockaddr_in6 *sin6_p; 578 579 sin6_p = (struct sockaddr_in6 *)nam; 580 581 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 582 inp->inp_vflag |= INP_IPV4; 583 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 584 struct sockaddr_in sin; 585 586 in6_sin6_2_sin(&sin, sin6_p); 587 inp->inp_vflag |= INP_IPV4; 588 inp->inp_vflag &= ~INP_IPV6; 589 s = splnet(); 590 error = in_pcbbind(inp, (struct sockaddr *)&sin, p); 591 splx(s); 592 return error; 593 } 594 } 595 596 s = splnet(); 597 error = in6_pcbbind(inp, nam, p); 598 splx(s); 599 return error; 600 } 601 602 static int 603 udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 604 { 605 struct inpcb *inp; 606 int s, error; 607 608 inp = sotoinpcb(so); 609 if (inp == 0) 610 return EINVAL; 611 612 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 613 struct sockaddr_in6 *sin6_p; 614 615 sin6_p = (struct sockaddr_in6 *)nam; 616 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 617 struct sockaddr_in sin; 618 619 if (inp->inp_faddr.s_addr != INADDR_ANY) 620 return EISCONN; 621 in6_sin6_2_sin(&sin, sin6_p); 622 s = splnet(); 623 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); 624 splx(s); 625 if (error == 0) { 626 inp->inp_vflag |= INP_IPV4; 627 inp->inp_vflag &= ~INP_IPV6; 628 soisconnected(so); 629 } 630 return error; 631 } 632 } 633 634 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 635 return EISCONN; 636 s = splnet(); 637 error = in6_pcbconnect(inp, nam, p); 638 splx(s); 639 if (error == 0) { 640 if (ip6_mapped_addr_on || (inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { /* should be non mapped addr */ 641 inp->inp_vflag &= ~INP_IPV4; 642 inp->inp_vflag |= INP_IPV6; 643 } 644 soisconnected(so); 645 } 646 return error; 647 } 648 649 static int 650 udp6_detach(struct socket *so) 651 { 652 struct inpcb *inp; 653 int s; 654 655 inp = sotoinpcb(so); 656 if (inp == 0) 657 return EINVAL; 658 s = splnet(); 659 in6_pcbdetach(inp); 660 splx(s); 661 return 0; 662 } 663 664 static int 665 udp6_disconnect(struct socket *so) 666 { 667 struct inpcb *inp; 668 int s; 669 670 inp = sotoinpcb(so); 671 if (inp == 0) 672 return EINVAL; 673 674 if (inp->inp_vflag & INP_IPV4) { 675 struct pr_usrreqs *pru; 676 677 pru = ip_protox[IPPROTO_UDP]->pr_usrreqs; 678 return ((*pru->pru_disconnect)(so)); 679 } 680 681 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 682 return ENOTCONN; 683 684 s = splnet(); 685 in6_pcbdisconnect(inp); 686 inp->in6p_laddr = in6addr_any; 687 splx(s); 688 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 689 return 0; 690 } 691 692 static int 693 udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 694 struct mbuf *control, struct proc *p) 695 { 696 struct inpcb *inp; 697 int error = 0; 698 699 inp = sotoinpcb(so); 700 if (inp == 0) { 701 error = EINVAL; 702 goto bad; 703 } 704 705 if (addr) { 706 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 707 error = EINVAL; 708 goto bad; 709 } 710 if (addr->sa_family != AF_INET6) { 711 error = EAFNOSUPPORT; 712 goto bad; 713 } 714 } 715 716 if (ip6_mapped_addr_on || (inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 717 int hasv4addr; 718 struct sockaddr_in6 *sin6 = 0; 719 720 if (addr == 0) 721 hasv4addr = (inp->inp_vflag & INP_IPV4); 722 else { 723 sin6 = (struct sockaddr_in6 *)addr; 724 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 725 ? 1 : 0; 726 } 727 if (hasv4addr) { 728 struct pr_usrreqs *pru; 729 730 if (sin6) 731 in6_sin6_2_sin_in_sock(addr); 732 pru = ip_protox[IPPROTO_UDP]->pr_usrreqs; 733 error = ((*pru->pru_send)(so, flags, m, addr, control, 734 p)); 735 /* addr will just be freed in sendit(). */ 736 return error; 737 } 738 } 739 740 return udp6_output(inp, m, addr, control, p); 741 742 bad: 743 m_freem(m); 744 return(error); 745 } 746 747 struct pr_usrreqs udp6_usrreqs = { 748 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 749 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 750 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 751 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 752 in6_mapped_sockaddr, sosend, soreceive, sopoll 753 };
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