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