/* ------------------------------------------------------------------------- * 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 || defined(__GSOCKET_STANDALONE__) #include #ifndef __WXMAC__ #include #endif #ifdef __cplusplus extern "C" { #endif typedef struct _GSocket GSocket; typedef struct _GAddress GAddress; typedef enum { GSOCK_NOFAMILY = 0, GSOCK_INET, GSOCK_INET6, GSOCK_UNIX } GAddressType; typedef enum { GSOCK_STREAMED, GSOCK_UNSTREAMED } GSocketStream; typedef enum { GSOCK_NOERROR = 0, GSOCK_INVOP, GSOCK_IOERR, GSOCK_INVADDR, GSOCK_INVSOCK, GSOCK_NOHOST, GSOCK_INVPORT, GSOCK_WOULDBLOCK, GSOCK_TIMEDOUT, GSOCK_MEMERR } GSocketError; /* See below for an explanation on how events work. */ typedef enum { GSOCK_INPUT = 0, GSOCK_OUTPUT = 1, GSOCK_CONNECTION = 2, GSOCK_LOST = 3, GSOCK_MAX_EVENT = 4 } GSocketEvent; enum { GSOCK_INPUT_FLAG = 1 << GSOCK_INPUT, GSOCK_OUTPUT_FLAG = 1 << GSOCK_OUTPUT, GSOCK_CONNECTION_FLAG = 1 << GSOCK_CONNECTION, GSOCK_LOST_FLAG = 1 << GSOCK_LOST }; typedef int GSocketEventFlags; typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event, char *cdata); /* Global initializers */ /* GSocket_Init() must be called at the beginning */ int GSocket_Init(void); /* GSocket_Cleanup() must be called at the end */ void GSocket_Cleanup(void); /* Constructors / Destructors */ GSocket *GSocket_new(void); void GSocket_destroy(GSocket *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); /* Server specific parts */ /* GSocket_SetServer: * 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. 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: * 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(), ... */ /* 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, int size); /* GSocket_Select: * Polls the socket to determine its status. This function will * 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. */ GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags); /* Attributes */ /* GSocket_SetNonBlocking: * 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_SetTimeout(GSocket *socket, unsigned long millisec); /* GSocket_GetError: * 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 */ /* 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: * Enables the callbacks specified by 'flags'. Note that 'flags' * may be a combination of flags OR'ed toghether, so the same * callback function can be made to accept different events. * The callback function must have the following prototype: * * void function(GSocket *socket, GSocketEvent event, char *cdata) */ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags, GSocketCallback fallback, char *cdata); /* GSocket_UnsetCallback: * Disables all callbacks specified by 'flags', which may be a * combination of flags OR'ed toghether. */ void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags); /* GAddress */ GAddress *GAddress_new(void); GAddress *GAddress_copy(GAddress *address); void GAddress_destroy(GAddress *address); void GAddress_SetFamily(GAddress *address, GAddressType type); GAddressType GAddress_GetFamily(GAddress *address); /* The use of any of the next functions will set the address family to * the specific one. For example if you use GAddress_INET_SetHostName, * address family will be implicitly set to AF_INET. */ 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, const char *protocol); GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port); GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf); unsigned long GAddress_INET_GetHostAddress(GAddress *address); unsigned short GAddress_INET_GetPort(GAddress *address); /* TODO: Define specific parts (INET6, UNIX) */ GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path); GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf); #ifdef __cplusplus }; #endif /* __cplusplus */ #endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */ #endif /* __GSOCKET_H */