a02bb1438a
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@7995 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
319 lines
10 KiB
C
319 lines
10 KiB
C
/* -------------------------------------------------------------------------
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* Project: GSocket (Generic Socket)
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* Name: gsocket.h
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* Author: Guilhem Lavaux
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* Guillermo Rodriguez Garcia <guille@iies.es> (maintainer)
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* Purpose: GSocket include file (system independent)
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* CVSID: $Id$
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* -------------------------------------------------------------------------
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*/
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#ifndef __GSOCKET_H
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#define __GSOCKET_H
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#ifndef __GSOCKET_STANDALONE__
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#include "wx/setup.h"
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#endif
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#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
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#include <stddef.h>
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#ifndef __WXMAC__
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#include <sys/types.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _GSocket GSocket;
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typedef struct _GAddress GAddress;
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typedef enum {
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GSOCK_NOFAMILY = 0,
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GSOCK_INET,
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GSOCK_INET6,
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GSOCK_UNIX
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} GAddressType;
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typedef enum {
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GSOCK_STREAMED,
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GSOCK_UNSTREAMED
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} GSocketStream;
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typedef enum {
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GSOCK_NOERROR = 0,
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GSOCK_INVOP,
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GSOCK_IOERR,
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GSOCK_INVADDR,
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GSOCK_INVSOCK,
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GSOCK_NOHOST,
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GSOCK_INVPORT,
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GSOCK_WOULDBLOCK,
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GSOCK_TIMEDOUT,
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GSOCK_MEMERR
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} GSocketError;
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/* See below for an explanation on how events work.
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*/
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typedef enum {
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GSOCK_INPUT = 0,
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GSOCK_OUTPUT = 1,
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GSOCK_CONNECTION = 2,
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GSOCK_LOST = 3,
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GSOCK_MAX_EVENT = 4
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} GSocketEvent;
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enum {
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GSOCK_INPUT_FLAG = 1 << GSOCK_INPUT,
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GSOCK_OUTPUT_FLAG = 1 << GSOCK_OUTPUT,
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GSOCK_CONNECTION_FLAG = 1 << GSOCK_CONNECTION,
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GSOCK_LOST_FLAG = 1 << GSOCK_LOST
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};
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typedef int GSocketEventFlags;
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typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event,
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char *cdata);
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/* Global initializers */
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/* GSocket_Init() must be called at the beginning */
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int GSocket_Init(void);
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/* GSocket_Cleanup() must be called at the end */
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void GSocket_Cleanup(void);
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/* Constructors / Destructors */
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GSocket *GSocket_new(void);
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void GSocket_destroy(GSocket *socket);
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/* GSocket_Shutdown:
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* Disallow further read/write operations on this socket, close
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* the fd and disable all callbacks.
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*/
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void GSocket_Shutdown(GSocket *socket);
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/* Address handling */
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/* GSocket_SetLocal:
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* GSocket_GetLocal:
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* GSocket_SetPeer:
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* GSocket_GetPeer:
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* Set or get the local or peer address for this socket. The 'set'
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* functions return GSOCK_NOERROR on success, an error code otherwise.
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* The 'get' functions return a pointer to a GAddress object on success,
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* or NULL otherwise, in which case they set the error code of the
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* corresponding GSocket.
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*
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* Error codes:
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* GSOCK_INVSOCK - the socket is not valid.
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* GSOCK_INVADDR - the address is not valid.
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*/
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GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address);
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GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address);
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GAddress *GSocket_GetLocal(GSocket *socket);
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GAddress *GSocket_GetPeer(GSocket *socket);
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/* Server specific parts */
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/* GSocket_SetServer:
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* Sets up this socket as a server. The local address must have been
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* set with GSocket_SetLocal() before GSocket_SetServer() is called.
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* Returns GSOCK_NOERROR on success, one of the following otherwise:
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*
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* Error codes:
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* GSOCK_INVSOCK - the socket is in use.
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* GSOCK_INVADDR - the local address has not been set.
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* GSOCK_IOERR - low-level error.
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*/
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GSocketError GSocket_SetServer(GSocket *socket);
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/* GSocket_WaitConnection:
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* Waits for an incoming client connection. Returns a pointer to
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* a GSocket object, or NULL if there was an error, in which case
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* the last error field will be updated for the calling GSocket.
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*
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* Error codes (set in the calling GSocket)
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* GSOCK_INVSOCK - the socket is not valid or not a server.
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* GSOCK_TIMEDOUT - timeout, no incoming connections.
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* GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
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* GSOCK_MEMERR - couldn't allocate memory.
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* GSOCK_IOERR - low-level error.
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*/
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GSocket *GSocket_WaitConnection(GSocket *socket);
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/* Client specific parts */
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/* GSocket_Connect:
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* For stream (connection oriented) sockets, GSocket_Connect() tries
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* to establish a client connection to a server using the peer address
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* as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
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* connection has been succesfully established, or one of the error
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* codes listed below. Note that for nonblocking sockets, a return
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* value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
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* request can be completed later; you should use GSocket_Select()
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* to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
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* corresponding asynchronous events.
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*
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* For datagram (non connection oriented) sockets, GSocket_Connect()
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* just sets the peer address established with GSocket_SetPeer() as
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* default destination.
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*
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* Error codes:
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* GSOCK_INVSOCK - the socket is in use or not valid.
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* GSOCK_INVADDR - the peer address has not been established.
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* GSOCK_TIMEDOUT - timeout, the connection failed.
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* GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
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* GSOCK_MEMERR - couldn't allocate memory.
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* GSOCK_IOERR - low-level error.
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*/
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GSocketError GSocket_Connect(GSocket *socket, GSocketStream stream);
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/* Datagram sockets */
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/* GSocket_SetNonOriented:
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* Sets up this socket as a non-connection oriented (datagram) socket.
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* Before using this function, the local address must have been set
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* with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
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* on success, or one of the following otherwise.
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*
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* Error codes:
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* GSOCK_INVSOCK - the socket is in use.
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* GSOCK_INVADDR - the local address has not been set.
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* GSOCK_IOERR - low-level error.
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*/
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GSocketError GSocket_SetNonOriented(GSocket *socket);
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/* Generic IO */
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/* Like recv(), send(), ... */
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/* For datagram sockets, the incoming / outgoing addresses
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* are stored as / read from the 'peer' address field.
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*/
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int GSocket_Read(GSocket *socket, char *buffer, int size);
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int GSocket_Write(GSocket *socket, const char *buffer,
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int size);
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/* GSocket_Select:
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* Polls the socket to determine its status. This function will
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* check for the events specified in the 'flags' parameter, and
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* it will return a mask indicating which operations can be
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* performed. This function won't block, regardless of the
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* mode (blocking | nonblocking) of the socket.
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*/
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GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags);
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/* Attributes */
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/* GSocket_SetNonBlocking:
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* Sets the socket to non-blocking mode. All IO calls will return
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* immediately.
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*/
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void GSocket_SetNonBlocking(GSocket *socket, int non_block);
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/* GSocket_SetTimeout:
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* Sets the timeout for blocking calls. Time is expressed in
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* milliseconds.
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*/
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void GSocket_SetTimeout(GSocket *socket, unsigned long millisec);
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/* GSocket_GetError:
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* Returns the last error occured for this socket. Note that successful
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* operations do not clear this back to GSOCK_NOERROR, so use it only
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* after an error.
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*/
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GSocketError GSocket_GetError(GSocket *socket);
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/* Callbacks */
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/* GSOCK_INPUT:
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* There is data to be read in the input buffer. If, after a read
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* operation, there is still data available, the callback function will
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* be called again.
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* GSOCK_OUTPUT:
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* The socket is available for writing. That is, the next write call
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* won't block. This event is generated only once, when the connection is
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* first established, and then only if a call failed with GSOCK_WOULDBLOCK,
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* when the output buffer empties again. This means that the app should
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* assume that it can write since the first OUTPUT event, and no more
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* OUTPUT events will be generated unless an error occurs.
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* GSOCK_CONNECTION:
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* Connection succesfully established, for client sockets, or incoming
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* client connection, for server sockets. Wait for this event (also watch
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* out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
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* GSOCK_LOST:
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* The connection is lost (or a connection request failed); this could
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* be due to a failure, or due to the peer closing it gracefully.
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*/
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/* GSocket_SetCallback:
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* Enables the callbacks specified by 'flags'. Note that 'flags'
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* may be a combination of flags OR'ed toghether, so the same
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* callback function can be made to accept different events.
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* The callback function must have the following prototype:
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*
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* void function(GSocket *socket, GSocketEvent event, char *cdata)
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*/
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void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
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GSocketCallback fallback, char *cdata);
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/* GSocket_UnsetCallback:
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* Disables all callbacks specified by 'flags', which may be a
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* combination of flags OR'ed toghether.
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*/
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void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags);
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/* GAddress */
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GAddress *GAddress_new(void);
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GAddress *GAddress_copy(GAddress *address);
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void GAddress_destroy(GAddress *address);
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void GAddress_SetFamily(GAddress *address, GAddressType type);
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GAddressType GAddress_GetFamily(GAddress *address);
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/* The use of any of the next functions will set the address family to
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* the specific one. For example if you use GAddress_INET_SetHostName,
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* address family will be implicitly set to AF_INET.
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*/
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GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname);
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GSocketError GAddress_INET_SetAnyAddress(GAddress *address);
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GSocketError GAddress_INET_SetHostAddress(GAddress *address,
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unsigned long hostaddr);
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GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
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const char *protocol);
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GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port);
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GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname,
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size_t sbuf);
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unsigned long GAddress_INET_GetHostAddress(GAddress *address);
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unsigned short GAddress_INET_GetPort(GAddress *address);
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/* TODO: Define specific parts (INET6, UNIX) */
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GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path);
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GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf);
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#ifdef __cplusplus
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};
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#endif /* __cplusplus */
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#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
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#endif /* __GSOCKET_H */
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