X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/236ef8a96689d30479e10dc33485b3e5041b16e5..1621c234d152d16afe6f016ad8a6f49ef780c02b:/include/wx/gsocket.h?ds=sidebyside diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h index e5a9070209..4158ab1baa 100644 --- a/include/wx/gsocket.h +++ b/include/wx/gsocket.h @@ -1,35 +1,41 @@ /* ------------------------------------------------------------------------- * Project: GSocket (Generic Socket) * Name: gsocket.h + * Author: Guilhem Lavaux + * Guillermo Rodriguez Garcia (maintainer) * Purpose: GSocket include file (system independent) * CVSID: $Id$ * ------------------------------------------------------------------------- */ + #ifndef __GSOCKET_H #define __GSOCKET_H #ifndef __GSOCKET_STANDALONE__ #include "wx/setup.h" +#include "wx/platform.h" + +#include "wx/dlimpexp.h" // for WXDLLIMPEXP_NET + #endif #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) #include -#include -#if !defined(__cplusplus) -typedef unsigned int bool; -#endif - -#ifndef TRUE -#define TRUE 1 +/* + Including sys/types.h under cygwin results in the warnings about "fd_set + having been defined in sys/types.h" when winsock.h is included later and + doesn't seem to be necessary anyhow. It's not needed under Mac neither. + */ +#if !defined(__WXMAC__) && !defined(__CYGWIN__) && !defined(__WXWINCE__) +#include #endif -#ifndef FALSE -#define FALSE 0 +#ifdef __WXWINCE__ +#include #endif - #ifdef __cplusplus extern "C" { #endif @@ -62,6 +68,8 @@ typedef enum { GSOCK_MEMERR } GSocketError; +/* See below for an explanation on how events work. + */ typedef enum { GSOCK_INPUT = 0, GSOCK_OUTPUT = 1, @@ -83,68 +91,157 @@ typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event, char *cdata); +/* Functions tables for internal use by GSocket code: */ + +#ifndef __WINDOWS__ +struct GSocketBaseFunctionsTable +{ + void (*Detected_Read)(GSocket *socket); + void (*Detected_Write)(GSocket *socket); +}; +#endif + +struct GSocketGUIFunctionsTable +{ + int (*GUI_Init)(void); + void (*GUI_Cleanup)(void); + int (*GUI_Init_Socket)(GSocket *socket); + void (*GUI_Destroy_Socket)(GSocket *socket); +#ifndef __WINDOWS__ + void (*Install_Callback)(GSocket *socket, GSocketEvent event); + void (*Uninstall_Callback)(GSocket *socket, GSocketEvent event); +#endif + void (*Enable_Events)(GSocket *socket); + void (*Disable_Events)(GSocket *socket); +}; + + /* Global initializers */ +/* Sets GUI functions callbacks. Must be called *before* GSocket_Init + if the app uses async sockets. */ +void GSocket_SetGUIFunctions(struct GSocketGUIFunctionsTable *guifunc); + /* GSocket_Init() must be called at the beginning */ -bool GSocket_Init(); -/* GSocket_Cleanup() must be called at the ending */ -void GSocket_Cleanup(); +int GSocket_Init(void); + +/* GSocket_Cleanup() must be called at the end */ +void GSocket_Cleanup(void); + /* Constructors / Destructors */ -GSocket *GSocket_new(); +GSocket *GSocket_new(void); void GSocket_destroy(GSocket *socket); -/* This will disable all further IO calls to this socket */ + + +/* GSocket_Shutdown: + * Disallow further read/write operations on this socket, close + * the fd and disable all callbacks. + */ void GSocket_Shutdown(GSocket *socket); /* Address handling */ +/* GSocket_SetLocal: + * GSocket_GetLocal: + * GSocket_SetPeer: + * GSocket_GetPeer: + * Set or get the local or peer address for this socket. The 'set' + * functions return GSOCK_NOERROR on success, an error code otherwise. + * The 'get' functions return a pointer to a GAddress object on success, + * or NULL otherwise, in which case they set the error code of the + * corresponding GSocket. + * + * Error codes: + * GSOCK_INVSOCK - the socket is not valid. + * GSOCK_INVADDR - the address is not valid. + */ GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address); GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address); GAddress *GSocket_GetLocal(GSocket *socket); GAddress *GSocket_GetPeer(GSocket *socket); -/* Non-oriented connections handlers */ - -GSocketError GSocket_SetNonOriented(GSocket *socket); - /* Server specific parts */ /* GSocket_SetServer: - * Sets up the socket as a server. It uses the "Local" field of GSocket. - * "Local" must be set by GSocket_SetLocal() before GSocket_SetServer() - * is called. Possible error codes are: GSOCK_INVSOCK if socket has not - * been initialized, GSOCK_INVADDR if the local address has not been - * defined and GSOCK_IOERR for other internal errors. + * Sets up this socket as a server. The local address must have been + * set with GSocket_SetLocal() before GSocket_SetServer() is called. + * Returns GSOCK_NOERROR on success, one of the following otherwise: + * + * Error codes: + * GSOCK_INVSOCK - the socket is in use. + * GSOCK_INVADDR - the local address has not been set. + * GSOCK_IOERR - low-level error. */ GSocketError GSocket_SetServer(GSocket *socket); /* GSocket_WaitConnection: - * Waits for an incoming client connection. + * Waits for an incoming client connection. Returns a pointer to + * a GSocket object, or NULL if there was an error, in which case + * the last error field will be updated for the calling GSocket. + * + * Error codes (set in the calling GSocket) + * GSOCK_INVSOCK - the socket is not valid or not a server. + * GSOCK_TIMEDOUT - timeout, no incoming connections. + * GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking. + * GSOCK_MEMERR - couldn't allocate memory. + * GSOCK_IOERR - low-level error. */ GSocket *GSocket_WaitConnection(GSocket *socket); + /* Client specific parts */ /* GSocket_Connect: - * Establishes a client connection to a server using the "Peer" - * field of GSocket. "Peer" must be set by GSocket_SetPeer() before - * GSocket_Connect() is called. Possible error codes are GSOCK_INVSOCK, - * GSOCK_INVADDR, GSOCK_TIMEDOUT, GSOCK_WOULDBLOCK and GSOCK_IOERR. - * If a socket is nonblocking and Connect() returns GSOCK_WOULDBLOCK, - * the connection request can be completed later. Use GSocket_Select() - * to check it, or wait for a GSOCK_CONNECTION event. + * For stream (connection oriented) sockets, GSocket_Connect() tries + * to establish a client connection to a server using the peer address + * as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the + * connection has been succesfully established, or one of the error + * codes listed below. Note that for nonblocking sockets, a return + * value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection + * request can be completed later; you should use GSocket_Select() + * to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the + * corresponding asynchronous events. + * + * For datagram (non connection oriented) sockets, GSocket_Connect() + * just sets the peer address established with GSocket_SetPeer() as + * default destination. + * + * Error codes: + * GSOCK_INVSOCK - the socket is in use or not valid. + * GSOCK_INVADDR - the peer address has not been established. + * GSOCK_TIMEDOUT - timeout, the connection failed. + * GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only) + * GSOCK_MEMERR - couldn't allocate memory. + * GSOCK_IOERR - low-level error. */ GSocketError GSocket_Connect(GSocket *socket, GSocketStream stream); + +/* Datagram sockets */ + +/* GSocket_SetNonOriented: + * Sets up this socket as a non-connection oriented (datagram) socket. + * Before using this function, the local address must have been set + * with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR + * on success, or one of the following otherwise. + * + * Error codes: + * GSOCK_INVSOCK - the socket is in use. + * GSOCK_INVADDR - the local address has not been set. + * GSOCK_IOERR - low-level error. + */ +GSocketError GSocket_SetNonOriented(GSocket *socket); + + /* Generic IO */ /* Like recv(), send(), ... */ -/* NOTE: In case we read from a non-oriented connection, the incoming - * (outgoing) connection address is stored in the "Local" ("Peer") - * field. +/* For datagram sockets, the incoming / outgoing addresses + * are stored as / read from the 'peer' address field. */ int GSocket_Read(GSocket *socket, char *buffer, int size); int GSocket_Write(GSocket *socket, const char *buffer, @@ -155,45 +252,53 @@ int GSocket_Write(GSocket *socket, const char *buffer, * check for the events specified in the 'flags' parameter, and * it will return a mask indicating which operations can be * performed. This function won't block, regardless of the - * mode (blocking|nonblocking) of the socket. + * mode (blocking | nonblocking) of the socket. */ GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags); -/* Flags/Parameters */ -/* GSocket_SetTimeout: - * Sets the timeout for blocking calls. Time is - * expressed in milliseconds. - */ -void GSocket_SetTimeout(GSocket *socket, unsigned long millisec); +/* Attributes */ /* GSocket_SetNonBlocking: - * Sets the socket to non-blocking mode. This is useful if - * we don't want to wait. + * Sets the socket to non-blocking mode. All IO calls will return + * immediately. */ -void GSocket_SetNonBlocking(GSocket *socket, bool non_block); +void GSocket_SetNonBlocking(GSocket *socket, int non_block); + +/* GSocket_SetTimeout: + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. + */ +void GSocket_SetTimeout(GSocket *socket, unsigned long millisec); /* GSocket_GetError: - * Returns the last error occured for this socket. + * Returns the last error occured for this socket. Note that successful + * operations do not clear this back to GSOCK_NOERROR, so use it only + * after an error. */ -GSocketError GSocket_GetError(GSocket *socket); +GSocketError WXDLLIMPEXP_NET GSocket_GetError(GSocket *socket); + /* Callbacks */ -/* Only one callback is possible for each event (INPUT, OUTPUT, CONNECTION - * and LOST). The callbacks are called in the following situations: - * - * INPUT: There is at least one byte in the input buffer - * OUTPUT: The system is sure that the next write call will not block - * CONNECTION: Two cases are possible: - * Client socket -> the connection is established - * Server socket -> a client requests a connection - * LOST: The connection is lost - * - * An event is generated only once and its state is reseted when the - * relative IO call is requested. - * For example: INPUT -> GSocket_Read() - * CONNECTION -> GSocket_Accept() +/* GSOCK_INPUT: + * There is data to be read in the input buffer. If, after a read + * operation, there is still data available, the callback function will + * be called again. + * GSOCK_OUTPUT: + * The socket is available for writing. That is, the next write call + * won't block. This event is generated only once, when the connection is + * first established, and then only if a call failed with GSOCK_WOULDBLOCK, + * when the output buffer empties again. This means that the app should + * assume that it can write since the first OUTPUT event, and no more + * OUTPUT events will be generated unless an error occurs. + * GSOCK_CONNECTION: + * Connection succesfully established, for client sockets, or incoming + * client connection, for server sockets. Wait for this event (also watch + * out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call. + * GSOCK_LOST: + * The connection is lost (or a connection request failed); this could + * be due to a failure, or due to the peer closing it gracefully. */ /* GSocket_SetCallback: @@ -213,9 +318,10 @@ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags, */ void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags); + /* GAddress */ -GAddress *GAddress_new(); +GAddress *GAddress_new(void); GAddress *GAddress_copy(GAddress *address); void GAddress_destroy(GAddress *address); @@ -228,6 +334,7 @@ GAddressType GAddress_GetFamily(GAddress *address); */ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname); +GSocketError GAddress_INET_SetAnyAddress(GAddress *address); GSocketError GAddress_INET_SetHostAddress(GAddress *address, unsigned long hostaddr); GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port, @@ -245,7 +352,7 @@ GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path); GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf); #ifdef __cplusplus -}; +} #endif /* __cplusplus */