include/wx/gsocket.h

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket)
   3  * Name:    gsocket.h
   4  * Purpose: GSocket include file (system independent)
   5  * CVSID:   $Id$
   6  * -------------------------------------------------------------------------
   7  */
   8 #ifndef __GSOCKET_H
   9 #define __GSOCKET_H
  10
  11 #include <sys/types.h>
  12
  13 #if !defined(__cplusplus)
  14
  15 typedef int bool;
  16
  17 #endif
  18
  19 #ifndef TRUE
  20 #define TRUE 1
  21 #endif
  22
  23 #ifndef FALSE
  24 #define FALSE 0
  25 #endif
  26
  27 typedef struct _GSocket GSocket;
  28 typedef struct _GAddress GAddress;
  29
  30 typedef enum {
  31   GSOCK_NOFAMILY = 0,
  32   GSOCK_INET,
  33   GSOCK_INET6,
  34   GSOCK_UNIX
  35 } GAddressType;
  36
  37 typedef enum {
  38   GSOCK_STREAMED,
  39   GSOCK_UNSTREAMED
  40 } GSocketStream;
  41
  42 typedef enum {
  43   GSOCK_NOERROR = 0,
  44   GSOCK_INVOP,
  45   GSOCK_IOERR,
  46   GSOCK_INVADDR,
  47   GSOCK_INVSOCK,
  48   GSOCK_NOHOST,
  49   GSOCK_INVPORT
  50 } GSocketError;
  51
  52 typedef enum {
  53   GSOCK_INPUT  = 0,
  54   GSOCK_OUTPUT = 1,
  55   GSOCK_CONNECTION = 2,
  56   GSOCK_LOST = 3,
  57   GSOCK_MAX_EVENT = 4
  58 } GSocketEvent;
  59
  60 enum {
  61   GSOCK_INPUT_FLAG = 1 << GSOCK_INPUT,
  62   GSOCK_OUTPUT_FLAG = 1 << GSOCK_OUTPUT,
  63   GSOCK_CONNECTION_FLAG = 1 << GSOCK_CONNECTION,
  64   GSOCK_LOST_FLAG = 1 << GSOCK_LOST,
  65 };
  66
  67 typedef int GSocketEventFlags;
  68
  69 typedef void (*GSocketFallback)(GSocket *socket, GSocketEvent event,
  70                                 char *cdata);
  71
  72 #ifdef __cplusplus
  73 extern "C" {
  74 #endif
  75
  76 /* Constructors / Destructors */
  77
  78 GSocket *GSocket_new();
  79 void GSocket_destroy(GSocket *socket);
  80
  81 /* This will disable all IO calls to this socket but errors are still available */
  82 void GSocket_Shutdown(GSocket *socket);
  83
  84 /* Address handling */
  85
  86 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address);
  87 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address);
  88 GAddress *GSocket_GetLocal(GSocket *socket);
  89 GAddress *GSocket_GetPeer(GSocket *socket);
  90
  91 /* Non-oriented connections handlers */
  92
  93 GSocketError GSocket_SetNonOriented(GSocket *socket);
  94
  95 /* Server specific parts */
  96
  97 /*
  98   GSocket_SetServer() setup the socket as a server. It uses the "Local" field
  99   of GSocket. "Local" must be set by GSocket_SetLocal() before
 100   GSocket_SetServer() is called. In the other case, it returns GSOCK_INVADDR.
 101 */
 102 GSocketError GSocket_SetServer(GSocket *socket);
 103
 104 /*
 105   GSocket_WaitConnection() waits for an incoming client connection.
 106 */
 107 GSocket *GSocket_WaitConnection(GSocket *socket);
 108
 109 /* Client specific parts */
 110
 111 /*
 112   GSocket_Connect() establishes a client connection to a server using the "Peer"
 113   field of GSocket. "Peer" must be set by GSocket_SetPeer() before
 114   GSocket_Connect() is called. In the other case, it returns GSOCK_INVADDR.
 115 */
 116 GSocketError GSocket_Connect(GSocket *socket, GSocketStream stream);
 117
 118 /* Generic IO */
 119
 120 /* Like recv(), send(), ... */
 121 /*
 122    NOTE: In case we read from a non-oriented connection, the incoming (outgoing)
 123    connection address is stored in the "Local" ("Peer") field.
 124 */
 125 int GSocket_Read(GSocket *socket, char *buffer, int size);
 126 int GSocket_Write(GSocket *socket, const char *buffer,
 127                   int size);
 128 bool GSocket_DataAvailable(GSocket *socket);
 129
 130 /* Flags */
 131
 132 /*
 133   GSocket_SetBlocking() puts the socket in non-blocking mode. This is useful
 134   if we don't want to wait.
 135 */
 136 void GSocket_SetBlocking(GSocket *socket, bool block);
 137
 138 /*
 139   GSocket_GetError() returns the last error occured on the socket stream.
 140 */
 141
 142 GSocketError GSocket_GetError(GSocket *socket);
 143
 144 /* Callbacks */
 145
 146 /*
 147    Only one fallback is possible for each event (INPUT, OUTPUT, CONNECTION, LOST)
 148    INPUT: The function is called when there is at least a byte in the
 149           input buffer
 150    OUTPUT: The function is called when the system is sure the next write call
 151            will not block
 152    CONNECTION: Two cases is possible:
 153              Client socket -> the connection is established
 154              Server socket -> a client request a connection
 155    LOST: the connection is lost
 156
 157    SetFallback accepts a combination of these flags so a same callback can
 158    receive different events.
 159
 160    An event is generated only once and its state is reseted when the relative
 161    IO call is requested.
 162    For example: INPUT -> GSocket_Read()
 163                 CONNECTION -> GSocket_Accept()
 164 */
 165 void GSocket_SetFallback(GSocket *socket, GSocketEventFlags event,
 166                          GSocketFallback fallback, char *cdata);
 167
 168 /*
 169   UnsetFallback will disables all fallbacks specified by "event".
 170   NOTE: event may be a combination of flags
 171 */
 172 void GSocket_UnsetFallback(GSocket *socket, GSocketEventFlags event);
 173
 174 /* GAddress */
 175
 176 GAddress *GAddress_new();
 177 GAddress *GAddress_copy(GAddress *address);
 178 void GAddress_destroy(GAddress *address);
 179
 180 void GAddress_SetFamily(GAddress *address, GAddressType type);
 181 GAddressType GAddress_GetFamily(GAddress *address);
 182
 183 /*
 184    The use of any of the next functions will set the address family to the adapted
 185    one. For example if you use GAddress_INET_SetHostName, address family will be AF_INET
 186    implicitely
 187 */
 188
 189 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname);
 190 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
 191                                           unsigned long hostaddr);
 192 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port);
 193 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port);
 194
 195 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname,
 196                                        size_t sbuf);
 197 unsigned long GAddress_INET_GetHostAddress(GAddress *address);
 198 unsigned short GAddress_INET_GetPort(GAddress *address);
 199
 200 /* TODO: Define specific parts (INET6, UNIX) */
 201
 202 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path);
 203 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf);
 204
 205 /*
 206  * System specific functions
 207  */
 208
 209 /* On systems needing an event id */
 210 void GSocket_SetEventID(GSocket *socket, unsigned long evt_id);
 211
 212 /* On systems which don't have background refresh */
 213 void GSocket_DoEvent(unsigned long evt_id);
 214
 215 #ifdef __cplusplus
 216 };
 217 #endif
 218
 219 #endif
 220  /* __GSOCKET_H */