| 1 | /* ------------------------------------------------------------------------- |
| 2 | * Project: GSocket (Generic Socket) for WX |
| 3 | * Name: gsocket.c |
| 4 | * Authors: Guilhem Lavaux, |
| 5 | * Guillermo Rodriguez Garcia <guille@iies.es> (maintainer) |
| 6 | * Purpose: GSocket main Unix file |
| 7 | * Licence: The wxWindows licence |
| 8 | * CVSID: $Id$ |
| 9 | * ------------------------------------------------------------------------- |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * PLEASE don't put C++ comments here - this is a C source file. |
| 14 | */ |
| 15 | |
| 16 | #ifndef __GSOCKET_STANDALONE__ |
| 17 | #include "wx/setup.h" |
| 18 | #endif |
| 19 | |
| 20 | #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) |
| 21 | |
| 22 | #include <assert.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <netdb.h> |
| 25 | #include <sys/ioctl.h> |
| 26 | |
| 27 | #ifdef __VMS__ |
| 28 | #include <socket.h> |
| 29 | struct sockaddr_un |
| 30 | { |
| 31 | u_char sun_len; /* sockaddr len including null */ |
| 32 | u_char sun_family; /* AF_UNIX */ |
| 33 | char sun_path[108]; /* path name (gag) */ |
| 34 | }; |
| 35 | #else |
| 36 | #include <sys/socket.h> |
| 37 | #include <sys/un.h> |
| 38 | #endif |
| 39 | |
| 40 | #include <sys/time.h> |
| 41 | #include <netinet/in.h> |
| 42 | #include <arpa/inet.h> |
| 43 | #include <errno.h> |
| 44 | #include <string.h> |
| 45 | #include <unistd.h> |
| 46 | #include <stdio.h> |
| 47 | #include <stdlib.h> |
| 48 | #include <stddef.h> |
| 49 | #include <ctype.h> |
| 50 | #ifdef sun |
| 51 | # include <sys/filio.h> |
| 52 | #endif |
| 53 | #ifdef sgi |
| 54 | # include <bstring.h> |
| 55 | #endif |
| 56 | #include <signal.h> |
| 57 | |
| 58 | #ifndef SOCKLEN_T |
| 59 | |
| 60 | #ifdef VMS |
| 61 | # define SOCKLEN_T unsigned int |
| 62 | #else |
| 63 | # ifdef __GLIBC__ |
| 64 | # if __GLIBC__ == 2 |
| 65 | # define SOCKLEN_T socklen_t |
| 66 | # endif |
| 67 | # else |
| 68 | # define SOCKLEN_T int |
| 69 | # endif |
| 70 | #endif |
| 71 | |
| 72 | #endif /* SOCKLEN_T */ |
| 73 | |
| 74 | /* |
| 75 | * MSW defines this, Unices don't. |
| 76 | */ |
| 77 | #ifndef INVALID_SOCKET |
| 78 | #define INVALID_SOCKET -1 |
| 79 | #endif |
| 80 | |
| 81 | /* UnixWare reportedly needs this for FIONBIO definition */ |
| 82 | #ifdef __UNIXWARE__ |
| 83 | #include <sys/filio.h> |
| 84 | #endif |
| 85 | |
| 86 | /* |
| 87 | * INADDR_BROADCAST is identical to INADDR_NONE which is not defined |
| 88 | * on all systems. INADDR_BROADCAST should be fine to indicate an error. |
| 89 | */ |
| 90 | #ifndef INADDR_NONE |
| 91 | #define INADDR_NONE INADDR_BROADCAST |
| 92 | #endif |
| 93 | |
| 94 | #define MASK_SIGNAL() \ |
| 95 | { \ |
| 96 | void (*old_handler)(int); \ |
| 97 | \ |
| 98 | old_handler = signal(SIGPIPE, SIG_IGN); |
| 99 | |
| 100 | #define UNMASK_SIGNAL() \ |
| 101 | signal(SIGPIPE, old_handler); \ |
| 102 | } |
| 103 | |
| 104 | |
| 105 | #ifndef __GSOCKET_STANDALONE__ |
| 106 | # include "wx/unix/gsockunx.h" |
| 107 | # include "wx/gsocket.h" |
| 108 | #else |
| 109 | # include "gsockunx.h" |
| 110 | # include "gsocket.h" |
| 111 | #endif /* __GSOCKET_STANDALONE__ */ |
| 112 | |
| 113 | /* redefine some GUI-only functions to do nothing in console mode */ |
| 114 | #if defined(wxUSE_GUI) && !wxUSE_GUI |
| 115 | # define _GSocket_GUI_Init(socket) (1) |
| 116 | # define _GSocket_GUI_Destroy(socket) |
| 117 | # define _GSocket_Enable_Events(socket) |
| 118 | # define _GSocket_Disable_Events(socket) |
| 119 | # define _GSocket_Install_Callback(socket, event) |
| 120 | # define _GSocket_Uninstall_Callback(socket, event) |
| 121 | #endif /* wxUSE_GUI */ |
| 122 | |
| 123 | /* debugging helpers */ |
| 124 | #ifdef __GSOCKET_DEBUG__ |
| 125 | # define GSocket_Debug(args) printf args |
| 126 | #else |
| 127 | # define GSocket_Debug(args) |
| 128 | #endif /* __GSOCKET_DEBUG__ */ |
| 129 | |
| 130 | /* Global initialisers */ |
| 131 | |
| 132 | int GSocket_Init(void) |
| 133 | { |
| 134 | return 1; |
| 135 | } |
| 136 | |
| 137 | void GSocket_Cleanup(void) |
| 138 | { |
| 139 | } |
| 140 | |
| 141 | /* Constructors / Destructors for GSocket */ |
| 142 | |
| 143 | GSocket *GSocket_new(void) |
| 144 | { |
| 145 | int i, success; |
| 146 | GSocket *socket; |
| 147 | |
| 148 | socket = (GSocket *)malloc(sizeof(GSocket)); |
| 149 | |
| 150 | if (socket == NULL) |
| 151 | return NULL; |
| 152 | |
| 153 | socket->m_fd = INVALID_SOCKET; |
| 154 | for (i=0;i<GSOCK_MAX_EVENT;i++) |
| 155 | { |
| 156 | socket->m_cbacks[i] = NULL; |
| 157 | } |
| 158 | socket->m_detected = 0; |
| 159 | socket->m_local = NULL; |
| 160 | socket->m_peer = NULL; |
| 161 | socket->m_error = GSOCK_NOERROR; |
| 162 | socket->m_server = FALSE; |
| 163 | socket->m_stream = TRUE; |
| 164 | socket->m_gui_dependent = NULL; |
| 165 | socket->m_non_blocking = FALSE; |
| 166 | socket->m_timeout = 10*60*1000; |
| 167 | /* 10 minutes * 60 sec * 1000 millisec */ |
| 168 | socket->m_establishing = FALSE; |
| 169 | |
| 170 | /* Per-socket GUI-specific initialization */ |
| 171 | success = _GSocket_GUI_Init(socket); |
| 172 | if (!success) |
| 173 | { |
| 174 | free(socket); |
| 175 | return NULL; |
| 176 | } |
| 177 | |
| 178 | return socket; |
| 179 | } |
| 180 | |
| 181 | void GSocket_close(GSocket *socket) |
| 182 | { |
| 183 | _GSocket_Disable_Events(socket); |
| 184 | close(socket->m_fd); |
| 185 | socket->m_fd = INVALID_SOCKET; |
| 186 | } |
| 187 | |
| 188 | void GSocket_destroy(GSocket *socket) |
| 189 | { |
| 190 | assert(socket != NULL); |
| 191 | |
| 192 | /* Check that the socket is really shutdowned */ |
| 193 | if (socket->m_fd != INVALID_SOCKET) |
| 194 | GSocket_Shutdown(socket); |
| 195 | |
| 196 | /* Per-socket GUI-specific cleanup */ |
| 197 | _GSocket_GUI_Destroy(socket); |
| 198 | |
| 199 | /* Destroy private addresses */ |
| 200 | if (socket->m_local) |
| 201 | GAddress_destroy(socket->m_local); |
| 202 | |
| 203 | if (socket->m_peer) |
| 204 | GAddress_destroy(socket->m_peer); |
| 205 | |
| 206 | /* Destroy the socket itself */ |
| 207 | free(socket); |
| 208 | } |
| 209 | |
| 210 | /* GSocket_Shutdown: |
| 211 | * Disallow further read/write operations on this socket, close |
| 212 | * the fd and disable all callbacks. |
| 213 | */ |
| 214 | void GSocket_Shutdown(GSocket *socket) |
| 215 | { |
| 216 | int evt; |
| 217 | |
| 218 | assert(socket != NULL); |
| 219 | |
| 220 | /* If socket has been created, shutdown it */ |
| 221 | if (socket->m_fd != INVALID_SOCKET) |
| 222 | { |
| 223 | shutdown(socket->m_fd, 2); |
| 224 | GSocket_close(socket); |
| 225 | } |
| 226 | |
| 227 | /* Disable GUI callbacks */ |
| 228 | for (evt = 0; evt < GSOCK_MAX_EVENT; evt++) |
| 229 | socket->m_cbacks[evt] = NULL; |
| 230 | |
| 231 | socket->m_detected = GSOCK_LOST_FLAG; |
| 232 | } |
| 233 | |
| 234 | /* Address handling */ |
| 235 | |
| 236 | /* GSocket_SetLocal: |
| 237 | * GSocket_GetLocal: |
| 238 | * GSocket_SetPeer: |
| 239 | * GSocket_GetPeer: |
| 240 | * Set or get the local or peer address for this socket. The 'set' |
| 241 | * functions return GSOCK_NOERROR on success, an error code otherwise. |
| 242 | * The 'get' functions return a pointer to a GAddress object on success, |
| 243 | * or NULL otherwise, in which case they set the error code of the |
| 244 | * corresponding GSocket. |
| 245 | * |
| 246 | * Error codes: |
| 247 | * GSOCK_INVSOCK - the socket is not valid. |
| 248 | * GSOCK_INVADDR - the address is not valid. |
| 249 | */ |
| 250 | GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address) |
| 251 | { |
| 252 | assert(socket != NULL); |
| 253 | |
| 254 | /* the socket must be initialized, or it must be a server */ |
| 255 | if ((socket->m_fd != INVALID_SOCKET && !socket->m_server)) |
| 256 | { |
| 257 | socket->m_error = GSOCK_INVSOCK; |
| 258 | return GSOCK_INVSOCK; |
| 259 | } |
| 260 | |
| 261 | /* check address */ |
| 262 | if (address == NULL || address->m_family == GSOCK_NOFAMILY) |
| 263 | { |
| 264 | socket->m_error = GSOCK_INVADDR; |
| 265 | return GSOCK_INVADDR; |
| 266 | } |
| 267 | |
| 268 | if (socket->m_local) |
| 269 | GAddress_destroy(socket->m_local); |
| 270 | |
| 271 | socket->m_local = GAddress_copy(address); |
| 272 | |
| 273 | return GSOCK_NOERROR; |
| 274 | } |
| 275 | |
| 276 | GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address) |
| 277 | { |
| 278 | assert(socket != NULL); |
| 279 | |
| 280 | /* check address */ |
| 281 | if (address == NULL || address->m_family == GSOCK_NOFAMILY) |
| 282 | { |
| 283 | socket->m_error = GSOCK_INVADDR; |
| 284 | return GSOCK_INVADDR; |
| 285 | } |
| 286 | |
| 287 | if (socket->m_peer) |
| 288 | GAddress_destroy(socket->m_peer); |
| 289 | |
| 290 | socket->m_peer = GAddress_copy(address); |
| 291 | |
| 292 | return GSOCK_NOERROR; |
| 293 | } |
| 294 | |
| 295 | GAddress *GSocket_GetLocal(GSocket *socket) |
| 296 | { |
| 297 | GAddress *address; |
| 298 | struct sockaddr addr; |
| 299 | SOCKLEN_T size = sizeof(addr); |
| 300 | GSocketError err; |
| 301 | |
| 302 | assert(socket != NULL); |
| 303 | |
| 304 | /* try to get it from the m_local var first */ |
| 305 | if (socket->m_local) |
| 306 | return GAddress_copy(socket->m_local); |
| 307 | |
| 308 | /* else, if the socket is initialized, try getsockname */ |
| 309 | if (socket->m_fd == INVALID_SOCKET) |
| 310 | { |
| 311 | socket->m_error = GSOCK_INVSOCK; |
| 312 | return NULL; |
| 313 | } |
| 314 | |
| 315 | if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0) |
| 316 | { |
| 317 | socket->m_error = GSOCK_IOERR; |
| 318 | return NULL; |
| 319 | } |
| 320 | |
| 321 | /* got a valid address from getsockname, create a GAddress object */ |
| 322 | address = GAddress_new(); |
| 323 | if (address == NULL) |
| 324 | { |
| 325 | socket->m_error = GSOCK_MEMERR; |
| 326 | return NULL; |
| 327 | } |
| 328 | |
| 329 | err = _GAddress_translate_from(address, &addr, size); |
| 330 | if (err != GSOCK_NOERROR) |
| 331 | { |
| 332 | GAddress_destroy(address); |
| 333 | socket->m_error = err; |
| 334 | return NULL; |
| 335 | } |
| 336 | |
| 337 | return address; |
| 338 | } |
| 339 | |
| 340 | GAddress *GSocket_GetPeer(GSocket *socket) |
| 341 | { |
| 342 | assert(socket != NULL); |
| 343 | |
| 344 | /* try to get it from the m_peer var */ |
| 345 | if (socket->m_peer) |
| 346 | return GAddress_copy(socket->m_peer); |
| 347 | |
| 348 | return NULL; |
| 349 | } |
| 350 | |
| 351 | /* Server specific parts */ |
| 352 | |
| 353 | /* GSocket_SetServer: |
| 354 | * Sets up this socket as a server. The local address must have been |
| 355 | * set with GSocket_SetLocal() before GSocket_SetServer() is called. |
| 356 | * Returns GSOCK_NOERROR on success, one of the following otherwise: |
| 357 | * |
| 358 | * Error codes: |
| 359 | * GSOCK_INVSOCK - the socket is in use. |
| 360 | * GSOCK_INVADDR - the local address has not been set. |
| 361 | * GSOCK_IOERR - low-level error. |
| 362 | */ |
| 363 | GSocketError GSocket_SetServer(GSocket *sck) |
| 364 | { |
| 365 | int arg = 1; |
| 366 | |
| 367 | assert(sck != NULL); |
| 368 | |
| 369 | /* must not be in use */ |
| 370 | if (sck->m_fd != INVALID_SOCKET) |
| 371 | { |
| 372 | sck->m_error = GSOCK_INVSOCK; |
| 373 | return GSOCK_INVSOCK; |
| 374 | } |
| 375 | |
| 376 | /* the local addr must have been set */ |
| 377 | if (!sck->m_local) |
| 378 | { |
| 379 | sck->m_error = GSOCK_INVADDR; |
| 380 | return GSOCK_INVADDR; |
| 381 | } |
| 382 | |
| 383 | /* Initialize all fields */ |
| 384 | sck->m_stream = TRUE; |
| 385 | sck->m_server = TRUE; |
| 386 | sck->m_oriented = TRUE; |
| 387 | |
| 388 | /* Create the socket */ |
| 389 | sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0); |
| 390 | |
| 391 | if (sck->m_fd == INVALID_SOCKET) |
| 392 | { |
| 393 | sck->m_error = GSOCK_IOERR; |
| 394 | return GSOCK_IOERR; |
| 395 | } |
| 396 | |
| 397 | ioctl(sck->m_fd, FIONBIO, &arg); |
| 398 | _GSocket_Enable_Events(sck); |
| 399 | |
| 400 | /* Bind to the local address, |
| 401 | * retrieve the actual address bound, |
| 402 | * and listen up to 5 connections. |
| 403 | */ |
| 404 | if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) || |
| 405 | (getsockname(sck->m_fd, |
| 406 | sck->m_local->m_addr, |
| 407 | (SOCKLEN_T *) &sck->m_local->m_len) != 0) || |
| 408 | (listen(sck->m_fd, 5) != 0)) |
| 409 | { |
| 410 | GSocket_close(sck); |
| 411 | sck->m_error = GSOCK_IOERR; |
| 412 | return GSOCK_IOERR; |
| 413 | } |
| 414 | |
| 415 | return GSOCK_NOERROR; |
| 416 | } |
| 417 | |
| 418 | /* GSocket_WaitConnection: |
| 419 | * Waits for an incoming client connection. Returns a pointer to |
| 420 | * a GSocket object, or NULL if there was an error, in which case |
| 421 | * the last error field will be updated for the calling GSocket. |
| 422 | * |
| 423 | * Error codes (set in the calling GSocket) |
| 424 | * GSOCK_INVSOCK - the socket is not valid or not a server. |
| 425 | * GSOCK_TIMEDOUT - timeout, no incoming connections. |
| 426 | * GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking. |
| 427 | * GSOCK_MEMERR - couldn't allocate memory. |
| 428 | * GSOCK_IOERR - low-level error. |
| 429 | */ |
| 430 | GSocket *GSocket_WaitConnection(GSocket *socket) |
| 431 | { |
| 432 | struct sockaddr from; |
| 433 | SOCKLEN_T fromlen = sizeof(from); |
| 434 | GSocket *connection; |
| 435 | GSocketError err; |
| 436 | int arg = 1; |
| 437 | |
| 438 | assert(socket != NULL); |
| 439 | |
| 440 | /* Reenable CONNECTION events */ |
| 441 | _GSocket_Enable(socket, GSOCK_CONNECTION); |
| 442 | |
| 443 | /* If the socket has already been created, we exit immediately */ |
| 444 | if (socket->m_fd == INVALID_SOCKET || !socket->m_server) |
| 445 | { |
| 446 | socket->m_error = GSOCK_INVSOCK; |
| 447 | return NULL; |
| 448 | } |
| 449 | |
| 450 | /* Create a GSocket object for the new connection */ |
| 451 | connection = GSocket_new(); |
| 452 | |
| 453 | if (!connection) |
| 454 | { |
| 455 | socket->m_error = GSOCK_MEMERR; |
| 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | /* Wait for a connection (with timeout) */ |
| 460 | if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT) |
| 461 | { |
| 462 | GSocket_destroy(connection); |
| 463 | /* socket->m_error set by _GSocket_Input_Timeout */ |
| 464 | return NULL; |
| 465 | } |
| 466 | |
| 467 | connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen); |
| 468 | |
| 469 | if (connection->m_fd == INVALID_SOCKET) |
| 470 | { |
| 471 | if (errno == EWOULDBLOCK) |
| 472 | socket->m_error = GSOCK_WOULDBLOCK; |
| 473 | else |
| 474 | socket->m_error = GSOCK_IOERR; |
| 475 | |
| 476 | GSocket_destroy(connection); |
| 477 | return NULL; |
| 478 | } |
| 479 | |
| 480 | /* Initialize all fields */ |
| 481 | connection->m_server = FALSE; |
| 482 | connection->m_stream = TRUE; |
| 483 | connection->m_oriented = TRUE; |
| 484 | |
| 485 | /* Setup the peer address field */ |
| 486 | connection->m_peer = GAddress_new(); |
| 487 | if (!connection->m_peer) |
| 488 | { |
| 489 | GSocket_destroy(connection); |
| 490 | socket->m_error = GSOCK_MEMERR; |
| 491 | return NULL; |
| 492 | } |
| 493 | err = _GAddress_translate_from(connection->m_peer, &from, fromlen); |
| 494 | if (err != GSOCK_NOERROR) |
| 495 | { |
| 496 | GAddress_destroy(connection->m_peer); |
| 497 | GSocket_destroy(connection); |
| 498 | socket->m_error = err; |
| 499 | return NULL; |
| 500 | } |
| 501 | |
| 502 | ioctl(connection->m_fd, FIONBIO, &arg); |
| 503 | _GSocket_Enable_Events(connection); |
| 504 | |
| 505 | return connection; |
| 506 | } |
| 507 | |
| 508 | /* Client specific parts */ |
| 509 | |
| 510 | /* GSocket_Connect: |
| 511 | * For stream (connection oriented) sockets, GSocket_Connect() tries |
| 512 | * to establish a client connection to a server using the peer address |
| 513 | * as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the |
| 514 | * connection has been succesfully established, or one of the error |
| 515 | * codes listed below. Note that for nonblocking sockets, a return |
| 516 | * value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection |
| 517 | * request can be completed later; you should use GSocket_Select() |
| 518 | * to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the |
| 519 | * corresponding asynchronous events. |
| 520 | * |
| 521 | * For datagram (non connection oriented) sockets, GSocket_Connect() |
| 522 | * just sets the peer address established with GSocket_SetPeer() as |
| 523 | * default destination. |
| 524 | * |
| 525 | * Error codes: |
| 526 | * GSOCK_INVSOCK - the socket is in use or not valid. |
| 527 | * GSOCK_INVADDR - the peer address has not been established. |
| 528 | * GSOCK_TIMEDOUT - timeout, the connection failed. |
| 529 | * GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only) |
| 530 | * GSOCK_MEMERR - couldn't allocate memory. |
| 531 | * GSOCK_IOERR - low-level error. |
| 532 | */ |
| 533 | GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream) |
| 534 | { |
| 535 | int err, ret; |
| 536 | int arg = 1; |
| 537 | |
| 538 | assert(sck != NULL); |
| 539 | |
| 540 | /* Enable CONNECTION events (needed for nonblocking connections) */ |
| 541 | _GSocket_Enable(sck, GSOCK_CONNECTION); |
| 542 | |
| 543 | if (sck->m_fd != INVALID_SOCKET) |
| 544 | { |
| 545 | sck->m_error = GSOCK_INVSOCK; |
| 546 | return GSOCK_INVSOCK; |
| 547 | } |
| 548 | |
| 549 | if (!sck->m_peer) |
| 550 | { |
| 551 | sck->m_error = GSOCK_INVADDR; |
| 552 | return GSOCK_INVADDR; |
| 553 | } |
| 554 | |
| 555 | /* Streamed or dgram socket? */ |
| 556 | sck->m_stream = (stream == GSOCK_STREAMED); |
| 557 | sck->m_oriented = TRUE; |
| 558 | sck->m_server = FALSE; |
| 559 | sck->m_establishing = FALSE; |
| 560 | |
| 561 | /* Create the socket */ |
| 562 | sck->m_fd = socket(sck->m_peer->m_realfamily, |
| 563 | sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0); |
| 564 | |
| 565 | if (sck->m_fd == INVALID_SOCKET) |
| 566 | { |
| 567 | sck->m_error = GSOCK_IOERR; |
| 568 | return GSOCK_IOERR; |
| 569 | } |
| 570 | |
| 571 | ioctl(sck->m_fd, FIONBIO, &arg); |
| 572 | _GSocket_Enable_Events(sck); |
| 573 | |
| 574 | /* Connect it to the peer address, with a timeout (see below) */ |
| 575 | ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len); |
| 576 | |
| 577 | if (ret == -1) |
| 578 | { |
| 579 | err = errno; |
| 580 | |
| 581 | /* If connect failed with EINPROGRESS and the GSocket object |
| 582 | * is in blocking mode, we select() for the specified timeout |
| 583 | * checking for writability to see if the connection request |
| 584 | * completes. |
| 585 | */ |
| 586 | if ((err == EINPROGRESS) && (!sck->m_non_blocking)) |
| 587 | { |
| 588 | if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT) |
| 589 | { |
| 590 | GSocket_close(sck); |
| 591 | /* sck->m_error is set in _GSocket_Output_Timeout */ |
| 592 | return GSOCK_TIMEDOUT; |
| 593 | } |
| 594 | else |
| 595 | { |
| 596 | int error; |
| 597 | SOCKLEN_T len = sizeof(error); |
| 598 | |
| 599 | getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len); |
| 600 | |
| 601 | if (!error) |
| 602 | return GSOCK_NOERROR; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* If connect failed with EINPROGRESS and the GSocket object |
| 607 | * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK |
| 608 | * (and return GSOCK_WOULDBLOCK) but we don't close the socket; |
| 609 | * this way if the connection completes, a GSOCK_CONNECTION |
| 610 | * event will be generated, if enabled. |
| 611 | */ |
| 612 | if ((err == EINPROGRESS) && (sck->m_non_blocking)) |
| 613 | { |
| 614 | sck->m_establishing = TRUE; |
| 615 | sck->m_error = GSOCK_WOULDBLOCK; |
| 616 | return GSOCK_WOULDBLOCK; |
| 617 | } |
| 618 | |
| 619 | /* If connect failed with an error other than EINPROGRESS, |
| 620 | * then the call to GSocket_Connect has failed. |
| 621 | */ |
| 622 | GSocket_close(sck); |
| 623 | sck->m_error = GSOCK_IOERR; |
| 624 | return GSOCK_IOERR; |
| 625 | } |
| 626 | |
| 627 | return GSOCK_NOERROR; |
| 628 | } |
| 629 | |
| 630 | /* Datagram sockets */ |
| 631 | |
| 632 | /* GSocket_SetNonOriented: |
| 633 | * Sets up this socket as a non-connection oriented (datagram) socket. |
| 634 | * Before using this function, the local address must have been set |
| 635 | * with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR |
| 636 | * on success, or one of the following otherwise. |
| 637 | * |
| 638 | * Error codes: |
| 639 | * GSOCK_INVSOCK - the socket is in use. |
| 640 | * GSOCK_INVADDR - the local address has not been set. |
| 641 | * GSOCK_IOERR - low-level error. |
| 642 | */ |
| 643 | GSocketError GSocket_SetNonOriented(GSocket *sck) |
| 644 | { |
| 645 | int arg = 1; |
| 646 | |
| 647 | assert(sck != NULL); |
| 648 | |
| 649 | if (sck->m_fd != INVALID_SOCKET) |
| 650 | { |
| 651 | sck->m_error = GSOCK_INVSOCK; |
| 652 | return GSOCK_INVSOCK; |
| 653 | } |
| 654 | |
| 655 | if (!sck->m_local) |
| 656 | { |
| 657 | sck->m_error = GSOCK_INVADDR; |
| 658 | return GSOCK_INVADDR; |
| 659 | } |
| 660 | |
| 661 | /* Initialize all fields */ |
| 662 | sck->m_stream = FALSE; |
| 663 | sck->m_server = FALSE; |
| 664 | sck->m_oriented = FALSE; |
| 665 | |
| 666 | /* Create the socket */ |
| 667 | sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0); |
| 668 | |
| 669 | if (sck->m_fd == INVALID_SOCKET) |
| 670 | { |
| 671 | sck->m_error = GSOCK_IOERR; |
| 672 | return GSOCK_IOERR; |
| 673 | } |
| 674 | |
| 675 | ioctl(sck->m_fd, FIONBIO, &arg); |
| 676 | _GSocket_Enable_Events(sck); |
| 677 | |
| 678 | /* Bind to the local address, |
| 679 | * and retrieve the actual address bound. |
| 680 | */ |
| 681 | if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) || |
| 682 | (getsockname(sck->m_fd, |
| 683 | sck->m_local->m_addr, |
| 684 | (SOCKLEN_T *) &sck->m_local->m_len) != 0)) |
| 685 | { |
| 686 | GSocket_close(sck); |
| 687 | sck->m_error = GSOCK_IOERR; |
| 688 | return GSOCK_IOERR; |
| 689 | } |
| 690 | |
| 691 | return GSOCK_NOERROR; |
| 692 | } |
| 693 | |
| 694 | /* Generic IO */ |
| 695 | |
| 696 | /* Like recv(), send(), ... */ |
| 697 | int GSocket_Read(GSocket *socket, char *buffer, int size) |
| 698 | { |
| 699 | int ret; |
| 700 | |
| 701 | assert(socket != NULL); |
| 702 | |
| 703 | /* Reenable INPUT events */ |
| 704 | _GSocket_Enable(socket, GSOCK_INPUT); |
| 705 | |
| 706 | if (socket->m_fd == INVALID_SOCKET || socket->m_server) |
| 707 | { |
| 708 | socket->m_error = GSOCK_INVSOCK; |
| 709 | return -1; |
| 710 | } |
| 711 | |
| 712 | /* If the socket is blocking, wait for data (with a timeout) */ |
| 713 | if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT) |
| 714 | return -1; |
| 715 | |
| 716 | /* Read the data */ |
| 717 | if (socket->m_stream) |
| 718 | ret = _GSocket_Recv_Stream(socket, buffer, size); |
| 719 | else |
| 720 | ret = _GSocket_Recv_Dgram(socket, buffer, size); |
| 721 | |
| 722 | if (ret == -1) |
| 723 | { |
| 724 | if (errno == EWOULDBLOCK) |
| 725 | socket->m_error = GSOCK_WOULDBLOCK; |
| 726 | else |
| 727 | socket->m_error = GSOCK_IOERR; |
| 728 | } |
| 729 | |
| 730 | return ret; |
| 731 | } |
| 732 | |
| 733 | int GSocket_Write(GSocket *socket, const char *buffer, int size) |
| 734 | { |
| 735 | int ret; |
| 736 | |
| 737 | assert(socket != NULL); |
| 738 | |
| 739 | GSocket_Debug(( "GSocket_Write #1, size %d\n", size )); |
| 740 | |
| 741 | if (socket->m_fd == INVALID_SOCKET || socket->m_server) |
| 742 | { |
| 743 | socket->m_error = GSOCK_INVSOCK; |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | GSocket_Debug(( "GSocket_Write #2, size %d\n", size )); |
| 748 | |
| 749 | /* If the socket is blocking, wait for writability (with a timeout) */ |
| 750 | if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT) |
| 751 | return -1; |
| 752 | |
| 753 | GSocket_Debug(( "GSocket_Write #3, size %d\n", size )); |
| 754 | |
| 755 | /* Write the data */ |
| 756 | if (socket->m_stream) |
| 757 | ret = _GSocket_Send_Stream(socket, buffer, size); |
| 758 | else |
| 759 | ret = _GSocket_Send_Dgram(socket, buffer, size); |
| 760 | |
| 761 | GSocket_Debug(( "GSocket_Write #4, size %d\n", size )); |
| 762 | |
| 763 | if (ret == -1) |
| 764 | { |
| 765 | if (errno == EWOULDBLOCK) |
| 766 | { |
| 767 | socket->m_error = GSOCK_WOULDBLOCK; |
| 768 | GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" )); |
| 769 | } |
| 770 | else |
| 771 | { |
| 772 | socket->m_error = GSOCK_IOERR; |
| 773 | GSocket_Debug(( "GSocket_Write error IOERR\n" )); |
| 774 | } |
| 775 | |
| 776 | /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect |
| 777 | * in MSW). Once the first OUTPUT event is received, users can assume |
| 778 | * that the socket is writable until a read operation fails. Only then |
| 779 | * will further OUTPUT events be posted. |
| 780 | */ |
| 781 | _GSocket_Enable(socket, GSOCK_OUTPUT); |
| 782 | return -1; |
| 783 | } |
| 784 | |
| 785 | GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret )); |
| 786 | |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | /* GSocket_Select: |
| 791 | * Polls the socket to determine its status. This function will |
| 792 | * check for the events specified in the 'flags' parameter, and |
| 793 | * it will return a mask indicating which operations can be |
| 794 | * performed. This function won't block, regardless of the |
| 795 | * mode (blocking | nonblocking) of the socket. |
| 796 | */ |
| 797 | GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags) |
| 798 | { |
| 799 | #if defined(wxUSE_GUI) && !wxUSE_GUI |
| 800 | |
| 801 | GSocketEventFlags result = 0; |
| 802 | fd_set readfds; |
| 803 | fd_set writefds; |
| 804 | fd_set exceptfds; |
| 805 | struct timeval tv; |
| 806 | |
| 807 | /* Do not use a static struct, Linux can garble it */ |
| 808 | tv.tv_sec = 0; |
| 809 | tv.tv_usec = 0; |
| 810 | |
| 811 | assert(socket != NULL); |
| 812 | |
| 813 | FD_ZERO(&readfds); |
| 814 | FD_ZERO(&writefds); |
| 815 | FD_ZERO(&exceptfds); |
| 816 | FD_SET(socket->m_fd, &readfds); |
| 817 | FD_SET(socket->m_fd, &writefds); |
| 818 | FD_SET(socket->m_fd, &exceptfds); |
| 819 | |
| 820 | /* Check 'sticky' CONNECTION flag first */ |
| 821 | result |= (GSOCK_CONNECTION_FLAG & socket->m_detected); |
| 822 | |
| 823 | /* If we have already detected a LOST event, then don't try |
| 824 | * to do any further processing. |
| 825 | */ |
| 826 | if ((socket->m_detected & GSOCK_LOST_FLAG) != 0) |
| 827 | { |
| 828 | socket->m_establishing = FALSE; |
| 829 | |
| 830 | return (GSOCK_LOST_FLAG & flags); |
| 831 | } |
| 832 | |
| 833 | /* Try select now */ |
| 834 | if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0) |
| 835 | { |
| 836 | /* What to do here? */ |
| 837 | return (result & flags); |
| 838 | } |
| 839 | |
| 840 | /* Check for readability */ |
| 841 | if (FD_ISSET(socket->m_fd, &readfds)) |
| 842 | { |
| 843 | char c; |
| 844 | |
| 845 | if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0) |
| 846 | { |
| 847 | result |= GSOCK_INPUT_FLAG; |
| 848 | } |
| 849 | else |
| 850 | { |
| 851 | if (socket->m_server && socket->m_stream) |
| 852 | { |
| 853 | result |= GSOCK_CONNECTION_FLAG; |
| 854 | socket->m_detected |= GSOCK_CONNECTION_FLAG; |
| 855 | } |
| 856 | else |
| 857 | { |
| 858 | socket->m_detected = GSOCK_LOST_FLAG; |
| 859 | socket->m_establishing = FALSE; |
| 860 | |
| 861 | /* LOST event: Abort any further processing */ |
| 862 | return (GSOCK_LOST_FLAG & flags); |
| 863 | } |
| 864 | } |
| 865 | } |
| 866 | |
| 867 | /* Check for writability */ |
| 868 | if (FD_ISSET(socket->m_fd, &writefds)) |
| 869 | { |
| 870 | if (socket->m_establishing && !socket->m_server) |
| 871 | { |
| 872 | int error; |
| 873 | SOCKLEN_T len = sizeof(error); |
| 874 | |
| 875 | socket->m_establishing = FALSE; |
| 876 | |
| 877 | getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len); |
| 878 | |
| 879 | if (error) |
| 880 | { |
| 881 | socket->m_detected = GSOCK_LOST_FLAG; |
| 882 | |
| 883 | /* LOST event: Abort any further processing */ |
| 884 | return (GSOCK_LOST_FLAG & flags); |
| 885 | } |
| 886 | else |
| 887 | { |
| 888 | result |= GSOCK_CONNECTION_FLAG; |
| 889 | socket->m_detected |= GSOCK_CONNECTION_FLAG; |
| 890 | } |
| 891 | } |
| 892 | else |
| 893 | { |
| 894 | result |= GSOCK_OUTPUT_FLAG; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | /* Check for exceptions and errors (is this useful in Unices?) */ |
| 899 | if (FD_ISSET(socket->m_fd, &exceptfds)) |
| 900 | { |
| 901 | socket->m_establishing = FALSE; |
| 902 | socket->m_detected = GSOCK_LOST_FLAG; |
| 903 | |
| 904 | /* LOST event: Abort any further processing */ |
| 905 | return (GSOCK_LOST_FLAG & flags); |
| 906 | } |
| 907 | |
| 908 | return (result & flags); |
| 909 | |
| 910 | #else |
| 911 | |
| 912 | assert(socket != NULL); |
| 913 | return flags & socket->m_detected; |
| 914 | |
| 915 | #endif /* !wxUSE_GUI */ |
| 916 | } |
| 917 | |
| 918 | /* Flags */ |
| 919 | |
| 920 | /* GSocket_SetNonBlocking: |
| 921 | * Sets the socket to non-blocking mode. All IO calls will return |
| 922 | * immediately. |
| 923 | */ |
| 924 | void GSocket_SetNonBlocking(GSocket *socket, int non_block) |
| 925 | { |
| 926 | assert(socket != NULL); |
| 927 | |
| 928 | GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) ); |
| 929 | |
| 930 | socket->m_non_blocking = non_block; |
| 931 | } |
| 932 | |
| 933 | /* GSocket_SetTimeout: |
| 934 | * Sets the timeout for blocking calls. Time is expressed in |
| 935 | * milliseconds. |
| 936 | */ |
| 937 | void GSocket_SetTimeout(GSocket *socket, unsigned long millisec) |
| 938 | { |
| 939 | assert(socket != NULL); |
| 940 | |
| 941 | socket->m_timeout = millisec; |
| 942 | } |
| 943 | |
| 944 | /* GSocket_GetError: |
| 945 | * Returns the last error occured for this socket. Note that successful |
| 946 | * operations do not clear this back to GSOCK_NOERROR, so use it only |
| 947 | * after an error. |
| 948 | */ |
| 949 | GSocketError GSocket_GetError(GSocket *socket) |
| 950 | { |
| 951 | assert(socket != NULL); |
| 952 | |
| 953 | return socket->m_error; |
| 954 | } |
| 955 | |
| 956 | /* Callbacks */ |
| 957 | |
| 958 | /* GSOCK_INPUT: |
| 959 | * There is data to be read in the input buffer. If, after a read |
| 960 | * operation, there is still data available, the callback function will |
| 961 | * be called again. |
| 962 | * GSOCK_OUTPUT: |
| 963 | * The socket is available for writing. That is, the next write call |
| 964 | * won't block. This event is generated only once, when the connection is |
| 965 | * first established, and then only if a call failed with GSOCK_WOULDBLOCK, |
| 966 | * when the output buffer empties again. This means that the app should |
| 967 | * assume that it can write since the first OUTPUT event, and no more |
| 968 | * OUTPUT events will be generated unless an error occurs. |
| 969 | * GSOCK_CONNECTION: |
| 970 | * Connection succesfully established, for client sockets, or incoming |
| 971 | * client connection, for server sockets. Wait for this event (also watch |
| 972 | * out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call. |
| 973 | * GSOCK_LOST: |
| 974 | * The connection is lost (or a connection request failed); this could |
| 975 | * be due to a failure, or due to the peer closing it gracefully. |
| 976 | */ |
| 977 | |
| 978 | /* GSocket_SetCallback: |
| 979 | * Enables the callbacks specified by 'flags'. Note that 'flags' |
| 980 | * may be a combination of flags OR'ed toghether, so the same |
| 981 | * callback function can be made to accept different events. |
| 982 | * The callback function must have the following prototype: |
| 983 | * |
| 984 | * void function(GSocket *socket, GSocketEvent event, char *cdata) |
| 985 | */ |
| 986 | void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags, |
| 987 | GSocketCallback callback, char *cdata) |
| 988 | { |
| 989 | int count; |
| 990 | |
| 991 | assert(socket != NULL); |
| 992 | |
| 993 | for (count = 0; count < GSOCK_MAX_EVENT; count++) |
| 994 | { |
| 995 | if ((flags & (1 << count)) != 0) |
| 996 | { |
| 997 | socket->m_cbacks[count] = callback; |
| 998 | socket->m_data[count] = cdata; |
| 999 | } |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | /* GSocket_UnsetCallback: |
| 1004 | * Disables all callbacks specified by 'flags', which may be a |
| 1005 | * combination of flags OR'ed toghether. |
| 1006 | */ |
| 1007 | void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags) |
| 1008 | { |
| 1009 | int count; |
| 1010 | |
| 1011 | assert(socket != NULL); |
| 1012 | |
| 1013 | for (count = 0; count < GSOCK_MAX_EVENT; count++) |
| 1014 | { |
| 1015 | if ((flags & (1 << count)) != 0) |
| 1016 | { |
| 1017 | socket->m_cbacks[count] = NULL; |
| 1018 | socket->m_data[count] = NULL; |
| 1019 | } |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | #define CALL_CALLBACK(socket, event) { \ |
| 1025 | _GSocket_Disable(socket, event); \ |
| 1026 | if (socket->m_cbacks[event]) \ |
| 1027 | socket->m_cbacks[event](socket, event, socket->m_data[event]); \ |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | void _GSocket_Enable(GSocket *socket, GSocketEvent event) |
| 1032 | { |
| 1033 | socket->m_detected &= ~(1 << event); |
| 1034 | _GSocket_Install_Callback(socket, event); |
| 1035 | } |
| 1036 | |
| 1037 | void _GSocket_Disable(GSocket *socket, GSocketEvent event) |
| 1038 | { |
| 1039 | socket->m_detected |= (1 << event); |
| 1040 | _GSocket_Uninstall_Callback(socket, event); |
| 1041 | } |
| 1042 | |
| 1043 | /* _GSocket_Input_Timeout: |
| 1044 | * For blocking sockets, wait until data is available or |
| 1045 | * until timeout ellapses. |
| 1046 | */ |
| 1047 | GSocketError _GSocket_Input_Timeout(GSocket *socket) |
| 1048 | { |
| 1049 | struct timeval tv; |
| 1050 | fd_set readfds; |
| 1051 | int ret; |
| 1052 | |
| 1053 | /* Linux select() will overwrite the struct on return */ |
| 1054 | tv.tv_sec = (socket->m_timeout / 1000); |
| 1055 | tv.tv_usec = (socket->m_timeout % 1000) * 1000; |
| 1056 | |
| 1057 | if (!socket->m_non_blocking) |
| 1058 | { |
| 1059 | FD_ZERO(&readfds); |
| 1060 | FD_SET(socket->m_fd, &readfds); |
| 1061 | ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv); |
| 1062 | if (ret == 0) |
| 1063 | { |
| 1064 | GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" )); |
| 1065 | socket->m_error = GSOCK_TIMEDOUT; |
| 1066 | return GSOCK_TIMEDOUT; |
| 1067 | } |
| 1068 | if (ret == -1) |
| 1069 | { |
| 1070 | GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" )); |
| 1071 | if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); } |
| 1072 | if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); } |
| 1073 | if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); } |
| 1074 | if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); } |
| 1075 | socket->m_error = GSOCK_TIMEDOUT; |
| 1076 | return GSOCK_TIMEDOUT; |
| 1077 | } |
| 1078 | } |
| 1079 | return GSOCK_NOERROR; |
| 1080 | } |
| 1081 | |
| 1082 | /* _GSocket_Output_Timeout: |
| 1083 | * For blocking sockets, wait until data can be sent without |
| 1084 | * blocking or until timeout ellapses. |
| 1085 | */ |
| 1086 | GSocketError _GSocket_Output_Timeout(GSocket *socket) |
| 1087 | { |
| 1088 | struct timeval tv; |
| 1089 | fd_set writefds; |
| 1090 | int ret; |
| 1091 | |
| 1092 | /* Linux select() will overwrite the struct on return */ |
| 1093 | tv.tv_sec = (socket->m_timeout / 1000); |
| 1094 | tv.tv_usec = (socket->m_timeout % 1000) * 1000; |
| 1095 | |
| 1096 | GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) ); |
| 1097 | |
| 1098 | if (!socket->m_non_blocking) |
| 1099 | { |
| 1100 | FD_ZERO(&writefds); |
| 1101 | FD_SET(socket->m_fd, &writefds); |
| 1102 | ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv); |
| 1103 | if (ret == 0) |
| 1104 | { |
| 1105 | GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" )); |
| 1106 | socket->m_error = GSOCK_TIMEDOUT; |
| 1107 | return GSOCK_TIMEDOUT; |
| 1108 | } |
| 1109 | if (ret == -1) |
| 1110 | { |
| 1111 | GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" )); |
| 1112 | if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); } |
| 1113 | if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); } |
| 1114 | if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); } |
| 1115 | if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); } |
| 1116 | socket->m_error = GSOCK_TIMEDOUT; |
| 1117 | return GSOCK_TIMEDOUT; |
| 1118 | } |
| 1119 | if ( ! FD_ISSET(socket->m_fd, &writefds) ) { |
| 1120 | GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" )); |
| 1121 | } |
| 1122 | else { |
| 1123 | GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" )); |
| 1124 | } |
| 1125 | } |
| 1126 | else |
| 1127 | { |
| 1128 | GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" )); |
| 1129 | } |
| 1130 | |
| 1131 | return GSOCK_NOERROR; |
| 1132 | } |
| 1133 | |
| 1134 | int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size) |
| 1135 | { |
| 1136 | return recv(socket->m_fd, buffer, size, 0); |
| 1137 | } |
| 1138 | |
| 1139 | int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size) |
| 1140 | { |
| 1141 | struct sockaddr from; |
| 1142 | SOCKLEN_T fromlen = sizeof(from); |
| 1143 | int ret; |
| 1144 | GSocketError err; |
| 1145 | |
| 1146 | fromlen = sizeof(from); |
| 1147 | |
| 1148 | ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen); |
| 1149 | |
| 1150 | if (ret == -1) |
| 1151 | return -1; |
| 1152 | |
| 1153 | /* Translate a system address into a GSocket address */ |
| 1154 | if (!socket->m_peer) |
| 1155 | { |
| 1156 | socket->m_peer = GAddress_new(); |
| 1157 | if (!socket->m_peer) |
| 1158 | { |
| 1159 | socket->m_error = GSOCK_MEMERR; |
| 1160 | return -1; |
| 1161 | } |
| 1162 | } |
| 1163 | err = _GAddress_translate_from(socket->m_peer, &from, fromlen); |
| 1164 | if (err != GSOCK_NOERROR) |
| 1165 | { |
| 1166 | GAddress_destroy(socket->m_peer); |
| 1167 | socket->m_peer = NULL; |
| 1168 | socket->m_error = err; |
| 1169 | return -1; |
| 1170 | } |
| 1171 | |
| 1172 | return ret; |
| 1173 | } |
| 1174 | |
| 1175 | int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size) |
| 1176 | { |
| 1177 | int ret; |
| 1178 | |
| 1179 | MASK_SIGNAL(); |
| 1180 | ret = send(socket->m_fd, buffer, size, 0); |
| 1181 | UNMASK_SIGNAL(); |
| 1182 | |
| 1183 | return ret; |
| 1184 | } |
| 1185 | |
| 1186 | int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size) |
| 1187 | { |
| 1188 | struct sockaddr *addr; |
| 1189 | int len, ret; |
| 1190 | GSocketError err; |
| 1191 | |
| 1192 | if (!socket->m_peer) |
| 1193 | { |
| 1194 | socket->m_error = GSOCK_INVADDR; |
| 1195 | return -1; |
| 1196 | } |
| 1197 | |
| 1198 | err = _GAddress_translate_to(socket->m_peer, &addr, &len); |
| 1199 | if (err != GSOCK_NOERROR) |
| 1200 | { |
| 1201 | socket->m_error = err; |
| 1202 | return -1; |
| 1203 | } |
| 1204 | |
| 1205 | MASK_SIGNAL(); |
| 1206 | ret = sendto(socket->m_fd, buffer, size, 0, addr, len); |
| 1207 | UNMASK_SIGNAL(); |
| 1208 | |
| 1209 | /* Frees memory allocated from _GAddress_translate_to */ |
| 1210 | free(addr); |
| 1211 | |
| 1212 | return ret; |
| 1213 | } |
| 1214 | |
| 1215 | void _GSocket_Detected_Read(GSocket *socket) |
| 1216 | { |
| 1217 | char c; |
| 1218 | |
| 1219 | /* If we have already detected a LOST event, then don't try |
| 1220 | * to do any further processing. |
| 1221 | */ |
| 1222 | if ((socket->m_detected & GSOCK_LOST_FLAG) != 0) |
| 1223 | { |
| 1224 | socket->m_establishing = FALSE; |
| 1225 | |
| 1226 | CALL_CALLBACK(socket, GSOCK_LOST); |
| 1227 | GSocket_Shutdown(socket); |
| 1228 | return; |
| 1229 | } |
| 1230 | |
| 1231 | if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0) |
| 1232 | { |
| 1233 | CALL_CALLBACK(socket, GSOCK_INPUT); |
| 1234 | } |
| 1235 | else |
| 1236 | { |
| 1237 | if (socket->m_server && socket->m_stream) |
| 1238 | { |
| 1239 | CALL_CALLBACK(socket, GSOCK_CONNECTION); |
| 1240 | } |
| 1241 | else |
| 1242 | { |
| 1243 | CALL_CALLBACK(socket, GSOCK_LOST); |
| 1244 | GSocket_Shutdown(socket); |
| 1245 | } |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | void _GSocket_Detected_Write(GSocket *socket) |
| 1250 | { |
| 1251 | /* If we have already detected a LOST event, then don't try |
| 1252 | * to do any further processing. |
| 1253 | */ |
| 1254 | if ((socket->m_detected & GSOCK_LOST_FLAG) != 0) |
| 1255 | { |
| 1256 | socket->m_establishing = FALSE; |
| 1257 | |
| 1258 | CALL_CALLBACK(socket, GSOCK_LOST); |
| 1259 | GSocket_Shutdown(socket); |
| 1260 | return; |
| 1261 | } |
| 1262 | |
| 1263 | if (socket->m_establishing && !socket->m_server) |
| 1264 | { |
| 1265 | int error; |
| 1266 | SOCKLEN_T len = sizeof(error); |
| 1267 | |
| 1268 | socket->m_establishing = FALSE; |
| 1269 | |
| 1270 | getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len); |
| 1271 | |
| 1272 | if (error) |
| 1273 | { |
| 1274 | CALL_CALLBACK(socket, GSOCK_LOST); |
| 1275 | GSocket_Shutdown(socket); |
| 1276 | } |
| 1277 | else |
| 1278 | { |
| 1279 | CALL_CALLBACK(socket, GSOCK_CONNECTION); |
| 1280 | /* We have to fire this event by hand because CONNECTION (for clients) |
| 1281 | * and OUTPUT are internally the same and we just disabled CONNECTION |
| 1282 | * events with the above macro. |
| 1283 | */ |
| 1284 | CALL_CALLBACK(socket, GSOCK_OUTPUT); |
| 1285 | } |
| 1286 | } |
| 1287 | else |
| 1288 | { |
| 1289 | CALL_CALLBACK(socket, GSOCK_OUTPUT); |
| 1290 | } |
| 1291 | } |
| 1292 | |
| 1293 | /* |
| 1294 | * ------------------------------------------------------------------------- |
| 1295 | * GAddress |
| 1296 | * ------------------------------------------------------------------------- |
| 1297 | */ |
| 1298 | |
| 1299 | /* CHECK_ADDRESS verifies that the current address family is either |
| 1300 | * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it |
| 1301 | * initalizes it to be a GSOCK_*family*. In other cases, it returns |
| 1302 | * an appropiate error code. |
| 1303 | * |
| 1304 | * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error. |
| 1305 | */ |
| 1306 | #define CHECK_ADDRESS(address, family) \ |
| 1307 | { \ |
| 1308 | if (address->m_family == GSOCK_NOFAMILY) \ |
| 1309 | if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \ |
| 1310 | return address->m_error; \ |
| 1311 | if (address->m_family != GSOCK_##family) \ |
| 1312 | { \ |
| 1313 | address->m_error = GSOCK_INVADDR; \ |
| 1314 | return GSOCK_INVADDR; \ |
| 1315 | } \ |
| 1316 | } |
| 1317 | |
| 1318 | #define CHECK_ADDRESS_RETVAL(address, family, retval) \ |
| 1319 | { \ |
| 1320 | if (address->m_family == GSOCK_NOFAMILY) \ |
| 1321 | if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \ |
| 1322 | return retval; \ |
| 1323 | if (address->m_family != GSOCK_##family) \ |
| 1324 | { \ |
| 1325 | address->m_error = GSOCK_INVADDR; \ |
| 1326 | return retval; \ |
| 1327 | } \ |
| 1328 | } |
| 1329 | |
| 1330 | |
| 1331 | GAddress *GAddress_new(void) |
| 1332 | { |
| 1333 | GAddress *address; |
| 1334 | |
| 1335 | if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL) |
| 1336 | return NULL; |
| 1337 | |
| 1338 | address->m_family = GSOCK_NOFAMILY; |
| 1339 | address->m_addr = NULL; |
| 1340 | address->m_len = 0; |
| 1341 | |
| 1342 | return address; |
| 1343 | } |
| 1344 | |
| 1345 | GAddress *GAddress_copy(GAddress *address) |
| 1346 | { |
| 1347 | GAddress *addr2; |
| 1348 | |
| 1349 | assert(address != NULL); |
| 1350 | |
| 1351 | if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL) |
| 1352 | return NULL; |
| 1353 | |
| 1354 | memcpy(addr2, address, sizeof(GAddress)); |
| 1355 | |
| 1356 | if (address->m_addr && address->m_len > 0) |
| 1357 | { |
| 1358 | addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len); |
| 1359 | if (addr2->m_addr == NULL) |
| 1360 | { |
| 1361 | free(addr2); |
| 1362 | return NULL; |
| 1363 | } |
| 1364 | memcpy(addr2->m_addr, address->m_addr, addr2->m_len); |
| 1365 | } |
| 1366 | |
| 1367 | return addr2; |
| 1368 | } |
| 1369 | |
| 1370 | void GAddress_destroy(GAddress *address) |
| 1371 | { |
| 1372 | assert(address != NULL); |
| 1373 | |
| 1374 | if (address->m_addr) |
| 1375 | free(address->m_addr); |
| 1376 | |
| 1377 | free(address); |
| 1378 | } |
| 1379 | |
| 1380 | void GAddress_SetFamily(GAddress *address, GAddressType type) |
| 1381 | { |
| 1382 | assert(address != NULL); |
| 1383 | |
| 1384 | address->m_family = type; |
| 1385 | } |
| 1386 | |
| 1387 | GAddressType GAddress_GetFamily(GAddress *address) |
| 1388 | { |
| 1389 | assert(address != NULL); |
| 1390 | |
| 1391 | return address->m_family; |
| 1392 | } |
| 1393 | |
| 1394 | GSocketError _GAddress_translate_from(GAddress *address, |
| 1395 | struct sockaddr *addr, int len) |
| 1396 | { |
| 1397 | address->m_realfamily = addr->sa_family; |
| 1398 | switch (addr->sa_family) |
| 1399 | { |
| 1400 | case AF_INET: |
| 1401 | address->m_family = GSOCK_INET; |
| 1402 | break; |
| 1403 | case AF_UNIX: |
| 1404 | address->m_family = GSOCK_UNIX; |
| 1405 | break; |
| 1406 | #ifdef AF_INET6 |
| 1407 | case AF_INET6: |
| 1408 | address->m_family = GSOCK_INET6; |
| 1409 | break; |
| 1410 | #endif |
| 1411 | default: |
| 1412 | { |
| 1413 | address->m_error = GSOCK_INVOP; |
| 1414 | return GSOCK_INVOP; |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | if (address->m_addr) |
| 1419 | free(address->m_addr); |
| 1420 | |
| 1421 | address->m_len = len; |
| 1422 | address->m_addr = (struct sockaddr *)malloc(len); |
| 1423 | |
| 1424 | if (address->m_addr == NULL) |
| 1425 | { |
| 1426 | address->m_error = GSOCK_MEMERR; |
| 1427 | return GSOCK_MEMERR; |
| 1428 | } |
| 1429 | memcpy(address->m_addr, addr, len); |
| 1430 | |
| 1431 | return GSOCK_NOERROR; |
| 1432 | } |
| 1433 | |
| 1434 | GSocketError _GAddress_translate_to(GAddress *address, |
| 1435 | struct sockaddr **addr, int *len) |
| 1436 | { |
| 1437 | if (!address->m_addr) |
| 1438 | { |
| 1439 | address->m_error = GSOCK_INVADDR; |
| 1440 | return GSOCK_INVADDR; |
| 1441 | } |
| 1442 | |
| 1443 | *len = address->m_len; |
| 1444 | *addr = (struct sockaddr *)malloc(address->m_len); |
| 1445 | if (*addr == NULL) |
| 1446 | { |
| 1447 | address->m_error = GSOCK_MEMERR; |
| 1448 | return GSOCK_MEMERR; |
| 1449 | } |
| 1450 | |
| 1451 | memcpy(*addr, address->m_addr, address->m_len); |
| 1452 | return GSOCK_NOERROR; |
| 1453 | } |
| 1454 | |
| 1455 | /* |
| 1456 | * ------------------------------------------------------------------------- |
| 1457 | * Internet address family |
| 1458 | * ------------------------------------------------------------------------- |
| 1459 | */ |
| 1460 | |
| 1461 | GSocketError _GAddress_Init_INET(GAddress *address) |
| 1462 | { |
| 1463 | address->m_len = sizeof(struct sockaddr_in); |
| 1464 | address->m_addr = (struct sockaddr *) malloc(address->m_len); |
| 1465 | if (address->m_addr == NULL) |
| 1466 | { |
| 1467 | address->m_error = GSOCK_MEMERR; |
| 1468 | return GSOCK_MEMERR; |
| 1469 | } |
| 1470 | |
| 1471 | address->m_family = GSOCK_INET; |
| 1472 | address->m_realfamily = PF_INET; |
| 1473 | ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET; |
| 1474 | ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY; |
| 1475 | |
| 1476 | return GSOCK_NOERROR; |
| 1477 | } |
| 1478 | |
| 1479 | GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname) |
| 1480 | { |
| 1481 | struct hostent *he; |
| 1482 | struct in_addr *addr; |
| 1483 | |
| 1484 | assert(address != NULL); |
| 1485 | |
| 1486 | CHECK_ADDRESS(address, INET); |
| 1487 | |
| 1488 | addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); |
| 1489 | |
| 1490 | /* If it is a numeric host name, convert it now */ |
| 1491 | #if defined(HAVE_INET_ATON) |
| 1492 | if (inet_aton(hostname, addr) == 0) |
| 1493 | { |
| 1494 | #elif defined(HAVE_INET_ADDR) |
| 1495 | if ( (addr->s_addr = inet_addr(hostname)) == -1 ) |
| 1496 | { |
| 1497 | #else |
| 1498 | /* Use gethostbyname by default */ |
| 1499 | if (1) |
| 1500 | { |
| 1501 | #endif |
| 1502 | struct in_addr *array_addr; |
| 1503 | |
| 1504 | /* It is a real name, we solve it */ |
| 1505 | if ((he = gethostbyname(hostname)) == NULL) |
| 1506 | { |
| 1507 | /* Reset to invalid address */ |
| 1508 | addr->s_addr = INADDR_NONE; |
| 1509 | address->m_error = GSOCK_NOHOST; |
| 1510 | return GSOCK_NOHOST; |
| 1511 | } |
| 1512 | array_addr = (struct in_addr *) *(he->h_addr_list); |
| 1513 | addr->s_addr = array_addr[0].s_addr; |
| 1514 | } |
| 1515 | return GSOCK_NOERROR; |
| 1516 | } |
| 1517 | |
| 1518 | GSocketError GAddress_INET_SetAnyAddress(GAddress *address) |
| 1519 | { |
| 1520 | return GAddress_INET_SetHostAddress(address, INADDR_ANY); |
| 1521 | } |
| 1522 | |
| 1523 | GSocketError GAddress_INET_SetHostAddress(GAddress *address, |
| 1524 | unsigned long hostaddr) |
| 1525 | { |
| 1526 | struct in_addr *addr; |
| 1527 | |
| 1528 | assert(address != NULL); |
| 1529 | |
| 1530 | CHECK_ADDRESS(address, INET); |
| 1531 | |
| 1532 | addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); |
| 1533 | addr->s_addr = hostaddr; |
| 1534 | |
| 1535 | return GSOCK_NOERROR; |
| 1536 | } |
| 1537 | |
| 1538 | GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port, |
| 1539 | const char *protocol) |
| 1540 | { |
| 1541 | struct servent *se; |
| 1542 | struct sockaddr_in *addr; |
| 1543 | |
| 1544 | assert(address != NULL); |
| 1545 | CHECK_ADDRESS(address, INET); |
| 1546 | |
| 1547 | if (!port) |
| 1548 | { |
| 1549 | address->m_error = GSOCK_INVPORT; |
| 1550 | return GSOCK_INVPORT; |
| 1551 | } |
| 1552 | |
| 1553 | se = getservbyname(port, protocol); |
| 1554 | if (!se) |
| 1555 | { |
| 1556 | /* the cast to int suppresses compiler warnings about subscript having the |
| 1557 | type char */ |
| 1558 | if (isdigit((int)port[0])) |
| 1559 | { |
| 1560 | int port_int; |
| 1561 | |
| 1562 | port_int = atoi(port); |
| 1563 | addr = (struct sockaddr_in *)address->m_addr; |
| 1564 | addr->sin_port = htons(port_int); |
| 1565 | return GSOCK_NOERROR; |
| 1566 | } |
| 1567 | |
| 1568 | address->m_error = GSOCK_INVPORT; |
| 1569 | return GSOCK_INVPORT; |
| 1570 | } |
| 1571 | |
| 1572 | addr = (struct sockaddr_in *)address->m_addr; |
| 1573 | addr->sin_port = se->s_port; |
| 1574 | |
| 1575 | return GSOCK_NOERROR; |
| 1576 | } |
| 1577 | |
| 1578 | GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port) |
| 1579 | { |
| 1580 | struct sockaddr_in *addr; |
| 1581 | |
| 1582 | assert(address != NULL); |
| 1583 | CHECK_ADDRESS(address, INET); |
| 1584 | |
| 1585 | addr = (struct sockaddr_in *)address->m_addr; |
| 1586 | addr->sin_port = htons(port); |
| 1587 | |
| 1588 | return GSOCK_NOERROR; |
| 1589 | } |
| 1590 | |
| 1591 | GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf) |
| 1592 | { |
| 1593 | struct hostent *he; |
| 1594 | char *addr_buf; |
| 1595 | struct sockaddr_in *addr; |
| 1596 | |
| 1597 | assert(address != NULL); |
| 1598 | CHECK_ADDRESS(address, INET); |
| 1599 | |
| 1600 | addr = (struct sockaddr_in *)address->m_addr; |
| 1601 | addr_buf = (char *)&(addr->sin_addr); |
| 1602 | |
| 1603 | he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET); |
| 1604 | if (he == NULL) |
| 1605 | { |
| 1606 | address->m_error = GSOCK_NOHOST; |
| 1607 | return GSOCK_NOHOST; |
| 1608 | } |
| 1609 | |
| 1610 | strncpy(hostname, he->h_name, sbuf); |
| 1611 | |
| 1612 | return GSOCK_NOERROR; |
| 1613 | } |
| 1614 | |
| 1615 | unsigned long GAddress_INET_GetHostAddress(GAddress *address) |
| 1616 | { |
| 1617 | struct sockaddr_in *addr; |
| 1618 | |
| 1619 | assert(address != NULL); |
| 1620 | CHECK_ADDRESS_RETVAL(address, INET, 0); |
| 1621 | |
| 1622 | addr = (struct sockaddr_in *)address->m_addr; |
| 1623 | |
| 1624 | return addr->sin_addr.s_addr; |
| 1625 | } |
| 1626 | |
| 1627 | unsigned short GAddress_INET_GetPort(GAddress *address) |
| 1628 | { |
| 1629 | struct sockaddr_in *addr; |
| 1630 | |
| 1631 | assert(address != NULL); |
| 1632 | CHECK_ADDRESS_RETVAL(address, INET, 0); |
| 1633 | |
| 1634 | addr = (struct sockaddr_in *)address->m_addr; |
| 1635 | return ntohs(addr->sin_port); |
| 1636 | } |
| 1637 | |
| 1638 | /* |
| 1639 | * ------------------------------------------------------------------------- |
| 1640 | * Unix address family |
| 1641 | * ------------------------------------------------------------------------- |
| 1642 | */ |
| 1643 | |
| 1644 | GSocketError _GAddress_Init_UNIX(GAddress *address) |
| 1645 | { |
| 1646 | address->m_len = sizeof(struct sockaddr_un); |
| 1647 | address->m_addr = (struct sockaddr *)malloc(address->m_len); |
| 1648 | if (address->m_addr == NULL) |
| 1649 | { |
| 1650 | address->m_error = GSOCK_MEMERR; |
| 1651 | return GSOCK_MEMERR; |
| 1652 | } |
| 1653 | |
| 1654 | address->m_family = GSOCK_UNIX; |
| 1655 | address->m_realfamily = PF_UNIX; |
| 1656 | ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX; |
| 1657 | ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0; |
| 1658 | |
| 1659 | return GSOCK_NOERROR; |
| 1660 | } |
| 1661 | |
| 1662 | #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0])) |
| 1663 | |
| 1664 | GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path) |
| 1665 | { |
| 1666 | struct sockaddr_un *addr; |
| 1667 | |
| 1668 | assert(address != NULL); |
| 1669 | |
| 1670 | CHECK_ADDRESS(address, UNIX); |
| 1671 | |
| 1672 | addr = ((struct sockaddr_un *)address->m_addr); |
| 1673 | strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN); |
| 1674 | addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0'; |
| 1675 | |
| 1676 | return GSOCK_NOERROR; |
| 1677 | } |
| 1678 | |
| 1679 | GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf) |
| 1680 | { |
| 1681 | struct sockaddr_un *addr; |
| 1682 | |
| 1683 | assert(address != NULL); |
| 1684 | CHECK_ADDRESS(address, UNIX); |
| 1685 | |
| 1686 | addr = (struct sockaddr_un *)address->m_addr; |
| 1687 | |
| 1688 | strncpy(path, addr->sun_path, sbuf); |
| 1689 | |
| 1690 | return GSOCK_NOERROR; |
| 1691 | } |
| 1692 | |
| 1693 | #endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */ |
| 1694 | |