1 /* 2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include <winsock2.h> 27 #include <ws2tcpip.h> 28 29 #include "net_util.h" 30 #include "jni.h" 31 32 #ifndef IPTOS_TOS_MASK 33 #define IPTOS_TOS_MASK 0x1e 34 #endif 35 #ifndef IPTOS_PREC_MASK 36 #define IPTOS_PREC_MASK 0xe0 37 #endif 38 39 /* true if SO_RCVTIMEO is supported */ 40 jboolean isRcvTimeoutSupported = JNI_TRUE; 41 42 /* 43 * Table of Windows Sockets errors, the specific exception we 44 * throw for the error, and the error text. 45 * 46 * Note that this table excludes OS dependent errors. 47 * 48 * Latest list of Windows Sockets errors can be found at :- 49 * http://msdn.microsoft.com/library/psdk/winsock/errors_3wc2.htm 50 */ 51 static struct { 52 int errCode; 53 const char *exc; 54 const char *errString; 55 } const winsock_errors[] = { 56 { WSAEACCES, 0, "Permission denied" }, 57 { WSAEADDRINUSE, "BindException", "Address already in use" }, 58 { WSAEADDRNOTAVAIL, "BindException", "Cannot assign requested address" }, 59 { WSAEAFNOSUPPORT, 0, "Address family not supported by protocol family" }, 60 { WSAEALREADY, 0, "Operation already in progress" }, 61 { WSAECONNABORTED, 0, "Software caused connection abort" }, 62 { WSAECONNREFUSED, "ConnectException", "Connection refused" }, 63 { WSAECONNRESET, 0, "Connection reset by peer" }, 64 { WSAEDESTADDRREQ, 0, "Destination address required" }, 65 { WSAEFAULT, 0, "Bad address" }, 66 { WSAEHOSTDOWN, 0, "Host is down" }, 67 { WSAEHOSTUNREACH, "NoRouteToHostException", "No route to host" }, 68 { WSAEINPROGRESS, 0, "Operation now in progress" }, 69 { WSAEINTR, 0, "Interrupted function call" }, 70 { WSAEINVAL, 0, "Invalid argument" }, 71 { WSAEISCONN, 0, "Socket is already connected" }, 72 { WSAEMFILE, 0, "Too many open files" }, 73 { WSAEMSGSIZE, 0, "The message is larger than the maximum supported by the underlying transport" }, 74 { WSAENETDOWN, 0, "Network is down" }, 75 { WSAENETRESET, 0, "Network dropped connection on reset" }, 76 { WSAENETUNREACH, 0, "Network is unreachable" }, 77 { WSAENOBUFS, 0, "No buffer space available (maximum connections reached?)" }, 78 { WSAENOPROTOOPT, 0, "Bad protocol option" }, 79 { WSAENOTCONN, 0, "Socket is not connected" }, 80 { WSAENOTSOCK, 0, "Socket operation on nonsocket" }, 81 { WSAEOPNOTSUPP, 0, "Operation not supported" }, 82 { WSAEPFNOSUPPORT, 0, "Protocol family not supported" }, 83 { WSAEPROCLIM, 0, "Too many processes" }, 84 { WSAEPROTONOSUPPORT, 0, "Protocol not supported" }, 85 { WSAEPROTOTYPE, 0, "Protocol wrong type for socket" }, 86 { WSAESHUTDOWN, 0, "Cannot send after socket shutdown" }, 87 { WSAESOCKTNOSUPPORT, 0, "Socket type not supported" }, 88 { WSAETIMEDOUT, "ConnectException", "Connection timed out" }, 89 { WSATYPE_NOT_FOUND, 0, "Class type not found" }, 90 { WSAEWOULDBLOCK, 0, "Resource temporarily unavailable" }, 91 { WSAHOST_NOT_FOUND, 0, "Host not found" }, 92 { WSA_NOT_ENOUGH_MEMORY, 0, "Insufficient memory available" }, 93 { WSANOTINITIALISED, 0, "Successful WSAStartup not yet performed" }, 94 { WSANO_DATA, 0, "Valid name, no data record of requested type" }, 95 { WSANO_RECOVERY, 0, "This is a nonrecoverable error" }, 96 { WSASYSNOTREADY, 0, "Network subsystem is unavailable" }, 97 { WSATRY_AGAIN, 0, "Nonauthoritative host not found" }, 98 { WSAVERNOTSUPPORTED, 0, "Winsock.dll version out of range" }, 99 { WSAEDISCON, 0, "Graceful shutdown in progress" }, 100 { WSA_OPERATION_ABORTED, 0, "Overlapped operation aborted" }, 101 }; 102 103 /* 104 * Initialize Windows Sockets API support 105 */ 106 BOOL WINAPI 107 DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) 108 { 109 WSADATA wsadata; 110 111 switch (reason) { 112 case DLL_PROCESS_ATTACH: 113 if (WSAStartup(MAKEWORD(2,2), &wsadata) != 0) { 114 return FALSE; 115 } 116 break; 117 118 case DLL_PROCESS_DETACH: 119 WSACleanup(); 120 break; 121 122 default: 123 break; 124 } 125 return TRUE; 126 } 127 128 void initLocalAddrTable () {} 129 void parseExclusiveBindProperty (JNIEnv *env) {} 130 131 /* 132 * Since winsock doesn't have the equivalent of strerror(errno) 133 * use table to lookup error text for the error. 134 */ 135 JNIEXPORT void JNICALL 136 NET_ThrowNew(JNIEnv *env, int errorNum, char *msg) 137 { 138 int i; 139 int table_size = sizeof(winsock_errors) / 140 sizeof(winsock_errors[0]); 141 char exc[256]; 142 char fullMsg[256]; 143 char *excP = NULL; 144 145 /* 146 * If exception already throw then don't overwrite it. 147 */ 148 if ((*env)->ExceptionOccurred(env)) { 149 return; 150 } 151 152 /* 153 * Default message text if not provided 154 */ 155 if (!msg) { 156 msg = "no further information"; 157 } 158 159 /* 160 * Check table for known winsock errors 161 */ 162 i=0; 163 while (i < table_size) { 164 if (errorNum == winsock_errors[i].errCode) { 165 break; 166 } 167 i++; 168 } 169 170 /* 171 * If found get pick the specific exception and error 172 * message corresponding to this error. 173 */ 174 if (i < table_size) { 175 excP = (char *)winsock_errors[i].exc; 176 jio_snprintf(fullMsg, sizeof(fullMsg), "%s: %s", 177 (char *)winsock_errors[i].errString, msg); 178 } else { 179 jio_snprintf(fullMsg, sizeof(fullMsg), 180 "Unrecognized Windows Sockets error: %d: %s", 181 errorNum, msg); 182 183 } 184 185 /* 186 * Throw SocketException if no specific exception for this 187 * error. 188 */ 189 if (excP == NULL) { 190 excP = "SocketException"; 191 } 192 sprintf(exc, "%s%s", JNU_JAVANETPKG, excP); 193 JNU_ThrowByName(env, exc, fullMsg); 194 } 195 196 void 197 NET_ThrowCurrent(JNIEnv *env, char *msg) 198 { 199 NET_ThrowNew(env, WSAGetLastError(), msg); 200 } 201 202 void 203 NET_ThrowSocketException(JNIEnv *env, char* msg) 204 { 205 static jclass cls = NULL; 206 if (cls == NULL) { 207 cls = (*env)->FindClass(env, "java/net/SocketException"); 208 CHECK_NULL(cls); 209 cls = (*env)->NewGlobalRef(env, cls); 210 CHECK_NULL(cls); 211 } 212 (*env)->ThrowNew(env, cls, msg); 213 } 214 215 void 216 NET_ThrowByNameWithLastError(JNIEnv *env, const char *name, 217 const char *defaultDetail) { 218 char errmsg[255]; 219 sprintf(errmsg, "errno: %d, error: %s\n", WSAGetLastError(), defaultDetail); 220 JNU_ThrowByNameWithLastError(env, name, errmsg); 221 } 222 223 jfieldID 224 NET_GetFileDescriptorID(JNIEnv *env) 225 { 226 jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor"); 227 CHECK_NULL_RETURN(cls, NULL); 228 return (*env)->GetFieldID(env, cls, "fd", "I"); 229 } 230 231 jint IPv6_supported() 232 { 233 SOCKET s = socket(AF_INET6, SOCK_STREAM, 0) ; 234 if (s == INVALID_SOCKET) { 235 return JNI_FALSE; 236 } 237 closesocket(s); 238 239 return JNI_TRUE; 240 } 241 242 /* 243 * Return the default TOS value 244 */ 245 int NET_GetDefaultTOS() { 246 static int default_tos = -1; 247 OSVERSIONINFO ver; 248 HKEY hKey; 249 LONG ret; 250 251 /* 252 * If default ToS already determined then return it 253 */ 254 if (default_tos >= 0) { 255 return default_tos; 256 } 257 258 /* 259 * Assume default is "normal service" 260 */ 261 default_tos = 0; 262 263 /* 264 * Which OS is this? 265 */ 266 ver.dwOSVersionInfoSize = sizeof(ver); 267 GetVersionEx(&ver); 268 269 /* 270 * If 2000 or greater then no default ToS in registry 271 */ 272 if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) { 273 if (ver.dwMajorVersion >= 5) { 274 return default_tos; 275 } 276 } 277 278 /* 279 * Query the registry to see if a Default ToS has been set. 280 * Different registry entry for NT vs 95/98/ME. 281 */ 282 if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) { 283 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, 284 "SYSTEM\\CurrentControlSet\\Services\\Tcp\\Parameters", 285 0, KEY_READ, (PHKEY)&hKey); 286 } else { 287 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, 288 "SYSTEM\\CurrentControlSet\\Services\\VxD\\MSTCP\\Parameters", 289 0, KEY_READ, (PHKEY)&hKey); 290 } 291 if (ret == ERROR_SUCCESS) { 292 DWORD dwLen; 293 DWORD dwDefaultTOS; 294 ULONG ulType; 295 dwLen = sizeof(dwDefaultTOS); 296 297 ret = RegQueryValueEx(hKey, "DefaultTOS", NULL, &ulType, 298 (LPBYTE)&dwDefaultTOS, &dwLen); 299 RegCloseKey(hKey); 300 if (ret == ERROR_SUCCESS) { 301 default_tos = (int)dwDefaultTOS; 302 } 303 } 304 return default_tos; 305 } 306 307 /* call NET_MapSocketOptionV6 for the IPv6 fd only 308 * and NET_MapSocketOption for the IPv4 fd 309 */ 310 JNIEXPORT int JNICALL 311 NET_MapSocketOptionV6(jint cmd, int *level, int *optname) { 312 313 switch (cmd) { 314 case java_net_SocketOptions_IP_MULTICAST_IF: 315 case java_net_SocketOptions_IP_MULTICAST_IF2: 316 *level = IPPROTO_IPV6; 317 *optname = IPV6_MULTICAST_IF; 318 return 0; 319 320 case java_net_SocketOptions_IP_MULTICAST_LOOP: 321 *level = IPPROTO_IPV6; 322 *optname = IPV6_MULTICAST_LOOP; 323 return 0; 324 } 325 return NET_MapSocketOption (cmd, level, optname); 326 } 327 328 /* 329 * Map the Java level socket option to the platform specific 330 * level and option name. 331 */ 332 333 JNIEXPORT int JNICALL 334 NET_MapSocketOption(jint cmd, int *level, int *optname) { 335 336 typedef struct { 337 jint cmd; 338 int level; 339 int optname; 340 } sockopts; 341 342 static sockopts opts[] = { 343 { java_net_SocketOptions_TCP_NODELAY, IPPROTO_TCP, TCP_NODELAY }, 344 { java_net_SocketOptions_SO_OOBINLINE, SOL_SOCKET, SO_OOBINLINE }, 345 { java_net_SocketOptions_SO_LINGER, SOL_SOCKET, SO_LINGER }, 346 { java_net_SocketOptions_SO_SNDBUF, SOL_SOCKET, SO_SNDBUF }, 347 { java_net_SocketOptions_SO_RCVBUF, SOL_SOCKET, SO_RCVBUF }, 348 { java_net_SocketOptions_SO_KEEPALIVE, SOL_SOCKET, SO_KEEPALIVE }, 349 { java_net_SocketOptions_SO_REUSEADDR, SOL_SOCKET, SO_REUSEADDR }, 350 { java_net_SocketOptions_SO_BROADCAST, SOL_SOCKET, SO_BROADCAST }, 351 { java_net_SocketOptions_IP_MULTICAST_IF, IPPROTO_IP, IP_MULTICAST_IF }, 352 { java_net_SocketOptions_IP_MULTICAST_LOOP, IPPROTO_IP, IP_MULTICAST_LOOP }, 353 { java_net_SocketOptions_IP_TOS, IPPROTO_IP, IP_TOS }, 354 355 }; 356 357 358 int i; 359 360 /* 361 * Map the Java level option to the native level 362 */ 363 for (i=0; i<(int)(sizeof(opts) / sizeof(opts[0])); i++) { 364 if (cmd == opts[i].cmd) { 365 *level = opts[i].level; 366 *optname = opts[i].optname; 367 return 0; 368 } 369 } 370 371 /* not found */ 372 return -1; 373 } 374 375 376 /* 377 * Wrapper for setsockopt dealing with Windows specific issues :- 378 * 379 * IP_TOS and IP_MULTICAST_LOOP can't be set on some Windows 380 * editions. 381 * 382 * The value for the type-of-service (TOS) needs to be masked 383 * to get consistent behaviour with other operating systems. 384 */ 385 JNIEXPORT int JNICALL 386 NET_SetSockOpt(int s, int level, int optname, const void *optval, 387 int optlen) 388 { 389 int rv; 390 int parg; 391 int plen = sizeof(parg); 392 393 if (level == IPPROTO_IP && optname == IP_TOS) { 394 int *tos = (int *)optval; 395 *tos &= (IPTOS_TOS_MASK | IPTOS_PREC_MASK); 396 } 397 398 if (optname == SO_REUSEADDR) { 399 /* 400 * Do not set SO_REUSEADDE if SO_EXCLUSIVEADDUSE is already set 401 */ 402 rv = NET_GetSockOpt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&parg, &plen); 403 if (rv == 0 && parg == 1) { 404 return rv; 405 } 406 } 407 408 rv = setsockopt(s, level, optname, optval, optlen); 409 410 if (rv == SOCKET_ERROR) { 411 /* 412 * IP_TOS & IP_MULTICAST_LOOP can't be set on some versions 413 * of Windows. 414 */ 415 if ((WSAGetLastError() == WSAENOPROTOOPT) && 416 (level == IPPROTO_IP) && 417 (optname == IP_TOS || optname == IP_MULTICAST_LOOP)) { 418 rv = 0; 419 } 420 421 /* 422 * IP_TOS can't be set on unbound UDP sockets. 423 */ 424 if ((WSAGetLastError() == WSAEINVAL) && 425 (level == IPPROTO_IP) && 426 (optname == IP_TOS)) { 427 rv = 0; 428 } 429 } 430 431 return rv; 432 } 433 434 /* 435 * Wrapper for setsockopt dealing with Windows specific issues :- 436 * 437 * IP_TOS is not supported on some versions of Windows so 438 * instead return the default value for the OS. 439 */ 440 JNIEXPORT int JNICALL 441 NET_GetSockOpt(int s, int level, int optname, void *optval, 442 int *optlen) 443 { 444 int rv; 445 446 rv = getsockopt(s, level, optname, optval, optlen); 447 448 449 /* 450 * IPPROTO_IP/IP_TOS is not supported on some Windows 451 * editions so return the default type-of-service 452 * value. 453 */ 454 if (rv == SOCKET_ERROR) { 455 456 if (WSAGetLastError() == WSAENOPROTOOPT && 457 level == IPPROTO_IP && optname == IP_TOS) { 458 459 int *tos; 460 tos = (int *)optval; 461 *tos = NET_GetDefaultTOS(); 462 463 rv = 0; 464 } 465 } 466 467 return rv; 468 } 469 470 /* 471 * Sets SO_ECLUSIVEADDRUSE if SO_REUSEADDR is not already set. 472 */ 473 void setExclusiveBind(int fd) { 474 int parg; 475 int plen = sizeof(parg); 476 int rv = 0; 477 rv = NET_GetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&parg, &plen); 478 if (rv == 0 && parg == 0) { 479 parg = 1; 480 rv = NET_SetSockOpt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char*)&parg, plen); 481 } 482 } 483 484 /* 485 * Wrapper for bind winsock call - transparent converts an 486 * error related to binding to a port that has exclusive access 487 * into an error indicating the port is in use (facilitates 488 * better error reporting). 489 * 490 * Should be only called by the wrapper method NET_WinBind 491 */ 492 JNIEXPORT int JNICALL 493 NET_Bind(int s, struct sockaddr *him, int len) 494 { 495 int rv; 496 rv = bind(s, him, len); 497 498 if (rv == SOCKET_ERROR) { 499 /* 500 * If bind fails with WSAEACCES it means that a privileged 501 * process has done an exclusive bind (NT SP4/2000/XP only). 502 */ 503 if (WSAGetLastError() == WSAEACCES) { 504 WSASetLastError(WSAEADDRINUSE); 505 } 506 } 507 508 return rv; 509 } 510 511 /* 512 * Wrapper for NET_Bind call. Sets SO_EXCLUSIVEADDRUSE 513 * if required, and then calls NET_BIND 514 */ 515 JNIEXPORT int JNICALL 516 NET_WinBind(int s, struct sockaddr *him, int len, jboolean exclBind) 517 { 518 if (exclBind == JNI_TRUE) 519 setExclusiveBind(s); 520 return NET_Bind(s, him, len); 521 } 522 523 JNIEXPORT int JNICALL 524 NET_SocketClose(int fd) { 525 struct linger l; 526 int ret; 527 int len = sizeof (l); 528 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, (char *)&l, &len) == 0) { 529 if (l.l_onoff == 0) { 530 WSASendDisconnect(fd, NULL); 531 } 532 } 533 ret = closesocket (fd); 534 return ret; 535 } 536 537 JNIEXPORT int JNICALL 538 NET_Timeout(int fd, long timeout) { 539 int ret; 540 fd_set tbl; 541 struct timeval t; 542 t.tv_sec = timeout / 1000; 543 t.tv_usec = (timeout % 1000) * 1000; 544 FD_ZERO(&tbl); 545 FD_SET(fd, &tbl); 546 ret = select (fd + 1, &tbl, 0, 0, &t); 547 return ret; 548 } 549 550 551 /* 552 * differs from NET_Timeout() as follows: 553 * 554 * If timeout = -1, it blocks forever. 555 * 556 * returns 1 or 2 depending if only one or both sockets 557 * fire at same time. 558 * 559 * *fdret is (one of) the active fds. If both sockets 560 * fire at same time, *fdret = fd always. 561 */ 562 JNIEXPORT int JNICALL 563 NET_Timeout2(int fd, int fd1, long timeout, int *fdret) { 564 int ret; 565 fd_set tbl; 566 struct timeval t, *tP = &t; 567 if (timeout == -1) { 568 tP = 0; 569 } else { 570 t.tv_sec = timeout / 1000; 571 t.tv_usec = (timeout % 1000) * 1000; 572 } 573 FD_ZERO(&tbl); 574 FD_SET(fd, &tbl); 575 FD_SET(fd1, &tbl); 576 ret = select (0, &tbl, 0, 0, tP); 577 switch (ret) { 578 case 0: 579 return 0; /* timeout */ 580 case 1: 581 if (FD_ISSET (fd, &tbl)) { 582 *fdret= fd; 583 } else { 584 *fdret= fd1; 585 } 586 return 1; 587 case 2: 588 *fdret= fd; 589 return 2; 590 } 591 return -1; 592 } 593 594 595 void dumpAddr (char *str, void *addr) { 596 struct SOCKADDR_IN6 *a = (struct SOCKADDR_IN6 *)addr; 597 int family = a->sin6_family; 598 printf ("%s\n", str); 599 if (family == AF_INET) { 600 struct sockaddr_in *him = (struct sockaddr_in *)addr; 601 printf ("AF_INET: port %d: %x\n", ntohs(him->sin_port), 602 ntohl(him->sin_addr.s_addr)); 603 } else { 604 int i; 605 struct in6_addr *in = &a->sin6_addr; 606 printf ("AF_INET6 "); 607 printf ("port %d ", ntohs (a->sin6_port)); 608 printf ("flow %d ", a->sin6_flowinfo); 609 printf ("addr "); 610 for (i=0; i<7; i++) { 611 printf ("%04x:", ntohs(in->s6_words[i])); 612 } 613 printf ("%04x", ntohs(in->s6_words[7])); 614 printf (" scope %d\n", a->sin6_scope_id); 615 } 616 } 617 618 /* Macro, which cleans-up the iv6bind structure, 619 * closes the two sockets (if open), 620 * and returns SOCKET_ERROR. Used in NET_BindV6 only. 621 */ 622 623 #define CLOSE_SOCKETS_AND_RETURN { \ 624 if (fd != -1) { \ 625 closesocket (fd); \ 626 fd = -1; \ 627 } \ 628 if (ofd != -1) { \ 629 closesocket (ofd); \ 630 ofd = -1; \ 631 } \ 632 if (close_fd != -1) { \ 633 closesocket (close_fd); \ 634 close_fd = -1; \ 635 } \ 636 if (close_ofd != -1) { \ 637 closesocket (close_ofd); \ 638 close_ofd = -1; \ 639 } \ 640 b->ipv4_fd = b->ipv6_fd = -1; \ 641 return SOCKET_ERROR; \ 642 } 643 644 /* 645 * if ipv6 is available, call NET_BindV6 to bind to the required address/port. 646 * Because the same port number may need to be reserved in both v4 and v6 space, 647 * this may require socket(s) to be re-opened. Therefore, all of this information 648 * is passed in and returned through the ipv6bind structure. 649 * 650 * If the request is to bind to a specific address, then this (by definition) means 651 * only bind in either v4 or v6, and this is just the same as normal. ie. a single 652 * call to bind() will suffice. The other socket is closed in this case. 653 * 654 * The more complicated case is when the requested address is ::0 or 0.0.0.0. 655 * 656 * Two further cases: 657 * 2. If the reqeusted port is 0 (ie. any port) then we try to bind in v4 space 658 * first with a wild-card port argument. We then try to bind in v6 space 659 * using the returned port number. If this fails, we repeat the process 660 * until a free port common to both spaces becomes available. 661 * 662 * 3. If the requested port is a specific port, then we just try to get that 663 * port in both spaces, and if it is not free in both, then the bind fails. 664 * 665 * On failure, sockets are closed and an error returned with CLOSE_SOCKETS_AND_RETURN 666 */ 667 668 JNIEXPORT int JNICALL 669 NET_BindV6(struct ipv6bind* b, jboolean exclBind) { 670 int fd=-1, ofd=-1, rv, len; 671 /* need to defer close until new sockets created */ 672 int close_fd=-1, close_ofd=-1; 673 SOCKETADDRESS oaddr; /* other address to bind */ 674 int family = b->addr->him.sa_family; 675 int ofamily; 676 u_short port; /* requested port parameter */ 677 u_short bound_port; 678 679 if (family == AF_INET && (b->addr->him4.sin_addr.s_addr != INADDR_ANY)) { 680 /* bind to v4 only */ 681 int ret; 682 ret = NET_WinBind ((int)b->ipv4_fd, (struct sockaddr *)b->addr, 683 sizeof (struct sockaddr_in), exclBind); 684 if (ret == SOCKET_ERROR) { 685 CLOSE_SOCKETS_AND_RETURN; 686 } 687 closesocket (b->ipv6_fd); 688 b->ipv6_fd = -1; 689 return 0; 690 } 691 if (family == AF_INET6 && (!IN6_IS_ADDR_ANY(&b->addr->him6.sin6_addr))) { 692 /* bind to v6 only */ 693 int ret; 694 ret = NET_WinBind ((int)b->ipv6_fd, (struct sockaddr *)b->addr, 695 sizeof (struct SOCKADDR_IN6), exclBind); 696 if (ret == SOCKET_ERROR) { 697 CLOSE_SOCKETS_AND_RETURN; 698 } 699 closesocket (b->ipv4_fd); 700 b->ipv4_fd = -1; 701 return 0; 702 } 703 704 /* We need to bind on both stacks, with the same port number */ 705 706 memset (&oaddr, 0, sizeof(oaddr)); 707 if (family == AF_INET) { 708 ofamily = AF_INET6; 709 fd = (int)b->ipv4_fd; 710 ofd = (int)b->ipv6_fd; 711 port = (u_short)GET_PORT (b->addr); 712 IN6ADDR_SETANY (&oaddr.him6); 713 oaddr.him6.sin6_port = port; 714 } else { 715 ofamily = AF_INET; 716 ofd = (int)b->ipv4_fd; 717 fd = (int)b->ipv6_fd; 718 port = (u_short)GET_PORT (b->addr); 719 oaddr.him4.sin_family = AF_INET; 720 oaddr.him4.sin_port = port; 721 oaddr.him4.sin_addr.s_addr = INADDR_ANY; 722 } 723 724 rv = NET_WinBind(fd, (struct sockaddr *)b->addr, SOCKETADDRESS_LEN(b->addr), exclBind); 725 if (rv == SOCKET_ERROR) { 726 CLOSE_SOCKETS_AND_RETURN; 727 } 728 729 /* get the port and set it in the other address */ 730 len = SOCKETADDRESS_LEN(b->addr); 731 if (getsockname(fd, (struct sockaddr *)b->addr, &len) == -1) { 732 CLOSE_SOCKETS_AND_RETURN; 733 } 734 bound_port = GET_PORT (b->addr); 735 SET_PORT (&oaddr, bound_port); 736 if ((rv=NET_WinBind (ofd, (struct sockaddr *) &oaddr, 737 SOCKETADDRESS_LEN (&oaddr), exclBind)) == SOCKET_ERROR) { 738 int retries; 739 int sotype, arglen=sizeof(sotype); 740 741 /* no retries unless, the request was for any free port */ 742 743 if (port != 0) { 744 CLOSE_SOCKETS_AND_RETURN; 745 } 746 747 getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, &arglen); 748 749 #define SOCK_RETRIES 50 750 /* 50 is an arbitrary limit, just to ensure that this 751 * cannot be an endless loop. Would expect socket creation to 752 * succeed sooner. 753 */ 754 for (retries = 0; retries < SOCK_RETRIES; retries ++) { 755 int len; 756 close_fd = fd; fd = -1; 757 close_ofd = ofd; ofd = -1; 758 b->ipv4_fd = SOCKET_ERROR; 759 b->ipv6_fd = SOCKET_ERROR; 760 761 /* create two new sockets */ 762 fd = (int)socket (family, sotype, 0); 763 if (fd == SOCKET_ERROR) { 764 CLOSE_SOCKETS_AND_RETURN; 765 } 766 ofd = (int)socket (ofamily, sotype, 0); 767 if (ofd == SOCKET_ERROR) { 768 CLOSE_SOCKETS_AND_RETURN; 769 } 770 771 /* bind random port on first socket */ 772 SET_PORT (&oaddr, 0); 773 rv = NET_WinBind (ofd, (struct sockaddr *)&oaddr, SOCKETADDRESS_LEN(&oaddr), 774 exclBind); 775 if (rv == SOCKET_ERROR) { 776 CLOSE_SOCKETS_AND_RETURN; 777 } 778 /* close the original pair of sockets before continuing */ 779 closesocket (close_fd); 780 closesocket (close_ofd); 781 close_fd = close_ofd = -1; 782 783 /* bind new port on second socket */ 784 len = SOCKETADDRESS_LEN(&oaddr); 785 if (getsockname(ofd, (struct sockaddr *)&oaddr, &len) == -1) { 786 CLOSE_SOCKETS_AND_RETURN; 787 } 788 bound_port = GET_PORT (&oaddr); 789 SET_PORT (b->addr, bound_port); 790 rv = NET_WinBind (fd, (struct sockaddr *)b->addr, SOCKETADDRESS_LEN(b->addr), 791 exclBind); 792 793 if (rv != SOCKET_ERROR) { 794 if (family == AF_INET) { 795 b->ipv4_fd = fd; 796 b->ipv6_fd = ofd; 797 } else { 798 b->ipv4_fd = ofd; 799 b->ipv6_fd = fd; 800 } 801 return 0; 802 } 803 } 804 CLOSE_SOCKETS_AND_RETURN; 805 } 806 return 0; 807 } 808 809 /* 810 * Determine the default interface for an IPv6 address. 811 * 812 * Returns :- 813 * 0 if error 814 * > 0 interface index to use 815 */ 816 jint getDefaultIPv6Interface(JNIEnv *env, struct SOCKADDR_IN6 *target_addr) 817 { 818 int ret; 819 DWORD b; 820 struct sockaddr_in6 route; 821 SOCKET fd = socket(AF_INET6, SOCK_STREAM, 0); 822 if (fd == INVALID_SOCKET) { 823 return 0; 824 } 825 826 ret = WSAIoctl(fd, SIO_ROUTING_INTERFACE_QUERY, 827 (void *)target_addr, sizeof(struct sockaddr_in6), 828 (void *)&route, sizeof(struct sockaddr_in6), 829 &b, 0, 0); 830 if (ret == SOCKET_ERROR) { 831 // error 832 closesocket(fd); 833 return 0; 834 } else { 835 closesocket(fd); 836 return route.sin6_scope_id; 837 } 838 } 839 840 /* If address types is IPv6, then IPv6 must be available. Otherwise 841 * no address can be generated. In the case of an IPv4 Inetaddress this 842 * method will return an IPv4 mapped address where IPv6 is available and 843 * v4MappedAddress is TRUE. Otherwise it will return a sockaddr_in 844 * structure for an IPv4 InetAddress. 845 */ 846 JNIEXPORT int JNICALL 847 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, struct sockaddr *him, 848 int *len, jboolean v4MappedAddress) { 849 jint family, iafam; 850 iafam = getInetAddress_family(env, iaObj); 851 family = (iafam == IPv4)? AF_INET : AF_INET6; 852 if (ipv6_available() && !(family == AF_INET && v4MappedAddress == JNI_FALSE)) { 853 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him; 854 jbyte caddr[16]; 855 jint address, scopeid = 0; 856 jint cached_scope_id = 0; 857 858 if (family == AF_INET) { /* will convert to IPv4-mapped address */ 859 memset((char *) caddr, 0, 16); 860 address = getInetAddress_addr(env, iaObj); 861 if (address == INADDR_ANY) { 862 /* we would always prefer IPv6 wildcard address 863 caddr[10] = 0xff; 864 caddr[11] = 0xff; */ 865 } else { 866 caddr[10] = 0xff; 867 caddr[11] = 0xff; 868 caddr[12] = ((address >> 24) & 0xff); 869 caddr[13] = ((address >> 16) & 0xff); 870 caddr[14] = ((address >> 8) & 0xff); 871 caddr[15] = (address & 0xff); 872 } 873 } else { 874 getInet6Address_ipaddress(env, iaObj, (char *)caddr); 875 scopeid = getInet6Address_scopeid(env, iaObj); 876 cached_scope_id = (jint)(*env)->GetIntField(env, iaObj, ia6_cachedscopeidID); 877 } 878 879 memset((char *)him6, 0, sizeof(struct SOCKADDR_IN6)); 880 him6->sin6_port = (u_short) htons((u_short)port); 881 memcpy((void *)&(him6->sin6_addr), caddr, sizeof(struct in6_addr) ); 882 him6->sin6_family = AF_INET6; 883 if ((family == AF_INET6) && IN6_IS_ADDR_LINKLOCAL( &(him6->sin6_addr) ) 884 && (!scopeid && !cached_scope_id)) { 885 cached_scope_id = getDefaultIPv6Interface(env, him6); 886 (*env)->SetIntField(env, iaObj, ia6_cachedscopeidID, cached_scope_id); 887 } 888 him6->sin6_scope_id = scopeid != 0 ? scopeid : cached_scope_id; 889 *len = sizeof(struct SOCKADDR_IN6) ; 890 } else { 891 struct sockaddr_in *him4 = (struct sockaddr_in*)him; 892 jint address; 893 if (family != AF_INET) { 894 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Protocol family unavailable"); 895 return -1; 896 } 897 memset((char *) him4, 0, sizeof(struct sockaddr_in)); 898 address = getInetAddress_addr(env, iaObj); 899 him4->sin_port = htons((short) port); 900 him4->sin_addr.s_addr = (u_long) htonl(address); 901 him4->sin_family = AF_INET; 902 *len = sizeof(struct sockaddr_in); 903 } 904 return 0; 905 } 906 907 JNIEXPORT jint JNICALL 908 NET_GetPortFromSockaddr(struct sockaddr *him) { 909 if (him->sa_family == AF_INET6) { 910 return ntohs(((struct sockaddr_in6*)him)->sin6_port); 911 } else { 912 return ntohs(((struct sockaddr_in*)him)->sin_port); 913 } 914 } 915 916 int 917 NET_IsIPv4Mapped(jbyte* caddr) { 918 int i; 919 for (i = 0; i < 10; i++) { 920 if (caddr[i] != 0x00) { 921 return 0; /* false */ 922 } 923 } 924 925 if (((caddr[10] & 0xff) == 0xff) && ((caddr[11] & 0xff) == 0xff)) { 926 return 1; /* true */ 927 } 928 return 0; /* false */ 929 } 930 931 int 932 NET_IPv4MappedToIPv4(jbyte* caddr) { 933 return ((caddr[12] & 0xff) << 24) | ((caddr[13] & 0xff) << 16) | ((caddr[14] & 0xff) << 8) 934 | (caddr[15] & 0xff); 935 } 936 937 int 938 NET_IsEqual(jbyte* caddr1, jbyte* caddr2) { 939 int i; 940 for (i = 0; i < 16; i++) { 941 if (caddr1[i] != caddr2[i]) { 942 return 0; /* false */ 943 } 944 } 945 return 1; 946 } 947 948 int getScopeID (struct sockaddr *him) { 949 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him; 950 return him6->sin6_scope_id; 951 } 952 953 int cmpScopeID (unsigned int scope, struct sockaddr *him) { 954 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him; 955 return him6->sin6_scope_id == scope; 956 } 957 958 /** 959 * Wrapper for select/poll with timeout on a single file descriptor. 960 * 961 * flags (defined in net_util_md.h can be any combination of 962 * NET_WAIT_READ, NET_WAIT_WRITE & NET_WAIT_CONNECT. 963 * 964 * The function will return when either the socket is ready for one 965 * of the specified operation or the timeout expired. 966 * 967 * It returns the time left from the timeout, or -1 if it expired. 968 */ 969 970 jint 971 NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout) 972 { 973 jlong prevTime = JVM_CurrentTimeMillis(env, 0); 974 jint read_rv; 975 976 while (1) { 977 jlong newTime; 978 fd_set rd, wr, ex; 979 struct timeval t; 980 981 t.tv_sec = timeout / 1000; 982 t.tv_usec = (timeout % 1000) * 1000; 983 984 FD_ZERO(&rd); 985 FD_ZERO(&wr); 986 FD_ZERO(&ex); 987 if (flags & NET_WAIT_READ) { 988 FD_SET(fd, &rd); 989 } 990 if (flags & NET_WAIT_WRITE) { 991 FD_SET(fd, &wr); 992 } 993 if (flags & NET_WAIT_CONNECT) { 994 FD_SET(fd, &wr); 995 FD_SET(fd, &ex); 996 } 997 998 errno = 0; 999 read_rv = select(fd+1, &rd, &wr, &ex, &t); 1000 1001 newTime = JVM_CurrentTimeMillis(env, 0); 1002 timeout -= (jint)(newTime - prevTime); 1003 if (timeout <= 0) { 1004 return read_rv > 0 ? 0 : -1; 1005 } 1006 newTime = prevTime; 1007 1008 if (read_rv > 0) { 1009 break; 1010 } 1011 1012 1013 } /* while */ 1014 1015 return timeout; 1016 } 1017 1018 int NET_Socket (int domain, int type, int protocol) { 1019 SOCKET sock; 1020 sock = socket (domain, type, protocol); 1021 if (sock != INVALID_SOCKET) { 1022 SetHandleInformation((HANDLE)(uintptr_t)sock, HANDLE_FLAG_INHERIT, FALSE); 1023 } 1024 return (int)sock; 1025 }