X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e9e3e3abaf8fb32ad82c6882b9af684e0430f881..59840ba3b16e4baf3228dd79c6b7ae40b55cf488:/include/wx/gsocket.h diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h index ecc65f37f6..5f6924aed3 100644 --- a/include/wx/gsocket.h +++ b/include/wx/gsocket.h @@ -1,33 +1,27 @@ /* ------------------------------------------------------------------------- * 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" +#endif -#if wxUSE_SOCKETS +#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) #include +#ifndef __WXMAC__ #include - -#if !defined(__cplusplus) -typedef int bool; #endif -#ifndef TRUE -#define TRUE 1 -#endif - -#ifndef FALSE -#define FALSE 0 -#endif - - #ifdef __cplusplus extern "C" { #endif @@ -60,6 +54,8 @@ typedef enum { GSOCK_MEMERR } GSocketError; +/* See below for an explanation on how events work. + */ typedef enum { GSOCK_INPUT = 0, GSOCK_OUTPUT = 1, @@ -84,65 +80,125 @@ typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event, /* Global initializers */ /* 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, @@ -153,45 +209,53 @@ 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, int non_block); + +/* GSocket_SetTimeout: + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. */ -void GSocket_SetNonBlocking(GSocket *socket, bool non_block); +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); + /* 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: @@ -211,9 +275,10 @@ 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); @@ -226,6 +291,7 @@ 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, @@ -247,6 +313,6 @@ GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf); #endif /* __cplusplus */ -#endif /* wxUSE_SOCKETS */ +#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */ #endif /* __GSOCKET_H */