MFC error code 0000274d getting in client server commumnication

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Hello Friends,

I have created a client-server application, using CAsyncSocket class.
I am getting error code 0000274d on client connection.
Can anyone help me in that. Currently only single client is connecting to the server.

Thanks in advance.

Posted 19-Jan-11 16:13pm

aamswe

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Andrew Brock · Answer 1 · 2011-01-19T16:26:00

Solution 1

Look at MSDN[^] for return codes:

C#

//
// MessageId: WSAECONNREFUSED
//
// MessageText:
//
// No connection could be made because the target machine actively refused it.
//
#define WSAECONNREFUSED                  10061L

MSDN: "This function is typically used by servers (or any application that wants to accept connections) that could have more than one connection request at a time: if a connection request arrives with the queue full, the client will receive an error with an indication of WSAECONNREFUSED."

Posted 19-Jan-11 16:26pm

Andrew Brock

Updated 19-Jan-11 16:30pm

v2

Comments

aamswe 19-Jan-11 23:03pm

Only one client is conencting to the server. How do I find the reason for above error?

Andrew Brock 19-Jan-11 23:22pm

I would suggest placing a breakpoint on your call to CAsyncSocket::Listen and stepping through it 1 line at a time (F11) and see if you cant see anything that jumps out as bad... like a buffer size of 0.
You may also need to run something like Wireshark (http://www.wireshark.org/) and see what is going on at a link level (may be 100's of requests comming in), and if you are running Windows Vista/7 open the resource monitor ResMon.exe and check the state of any sessions or listening ports associated with your program

aamswe 20-Jan-11 1:49am

problem was in socket creation on client side. now client is connecting to the server. But server is not receving messages from client. I have voerriden OnAccept and OnReceive functions, When I am sending message from client, OnAccept event is captured but it's not going in OnRecive. Even I tried to receive message on OnAccept event but zero byte recived.
What could be the problem?

Andrew Brock · Answer 2 · 2011-01-19T21:38:00

aamswe says:
problem was in socket creation on client side. now client is connecting to the server. But server is not receving messages from client. I have voerriden OnAccept and OnReceive functions, When I am sending message from client, OnAccept event is captured but it's not going in OnRecive. Even I tried to receive message on OnAccept event but zero byte recived.
What could be the problem?

If you are running Windows Vista/7 open ResMon.exe and go to the network page. Check to see if there is any sessions or data send/receive associated with your program.

If you are using a version of Windows previous to Vista, or you feel like it, get Wireshark[^] and start sniffing to see what is sent to/from the server.