Is there any way to tell if a socket is already connected?

Submitted by: Administrator
There are two ways to determine if a socket is connected. The easiest is to check the return value of ISOCKET_Connect(). When a socket is already connected, ISOCKET_Connect() will return EISCONN.

It is also possible to monitor the state of a socket connection by registering for the socket status change events NE_SO_CLOSING, and NE_SO_CLOSED with INETMGR_OnEvent(). Using this method, your application can avoid trying to connect an already connected socket.

For more information about network and socket events, including NE_SO_CLOSING and NE_SO_CLOSED, please refer to the following include file: AEENet.h.

For Example:

// Register to receive Network and Socket events
INETMGR_OnEvent(piNet, (PFNNETMGREVENT)CheckNetStatus,
(void*)pMe, TRUE);

//Callback invoked when Network/Socket event is received
static void CheckNetStatus(void* cxt, NetMgrEvent evt,
uint32 dwData)
SampleApp *pMe = (SampleApp*)cxt;

if(evt == NE_SO_CLOSING || evt == NE_SO_CLOSED) {
// flag set to false to indicate socket is disconnected
pMe->m_SocketConnected = FALSE;
if(evt == NE_SO_CONNECTED) {
// flag set to true to indicate socket is connected
pMe->m_SocketConnected = TRUE;
Submitted by: Administrator

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