How can I correct the error with ASSERT function in windows socket programming?

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Every time I try to debug the project in which I have written the Accept function I get a ASSERT leading to sockcore.cpp.
I am not able to understand what should I do next...
Can anyone please suggest what should I change in the code....

What I have tried:

**********ASSERT*********************
Debug Assertion Failed!
d:\agent\_work\3\src\vctools\VC7Libs\Ship\ATLMFC\SrcMFC\sockcorre.cpp
Line:183

For information on how your program can cause assertion failure, see the Visual C++ documentation on asserts.

(Press Retry to debug the application)
***************************************

the accept function I have tried..
void CFileDlg::OnAccept()
{
BOOL bRet = m_sListener.Accept(m_sConnected );
if (bRet != TRUE)
{
uErr = GetLastError();
wsprintf(szError, L"Accept failed: %d", uErr);
AfxMessageBox(szError);
}
else {

CSingleLock singleLock(&m_critsec, TRUE);
m_sharedData.bConnectClient = true;

}

Posted 18-Jul-19 1:52am

Member 14499788

Updated 18-Jul-19 20:30pm

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Comments

Richard MacCutchan 18-Jul-19 8:15am

You need to tell us which function call gives the ASSERT, and what value it is complaining about. Also when a normal error occurs, what GetLastError returns. Please remember we cannot see what happens when you run your code, you need to provide all the details.

Member 14499788 18-Jul-19 8:27am

GetLast returns zero error, if we click on repeat in the ASSERT file then it leads from main project to sockcore.cpp

BOOL CAsyncSocket::Accept(CAsyncSocket& rConnectedSocket,
SOCKADDR* lpSockAddr, int* lpSockAddrLen)
{
It points over her----->ASSERT(rConnectedSocket.m_hSocket == INVALID_SOCKET);
ASSERT(CAsyncSocket::FromHandle(INVALID_SOCKET) == NULL);

CAsyncSocket::AttachHandle(INVALID_SOCKET, &rConnectedSocket);
if (CAsyncSocket::FromHandle(INVALID_SOCKET) == NULL)
{
// AttachHandle Call has failed
return FALSE;
}

SOCKET hTemp = accept(m_hSocket, lpSockAddr, lpSockAddrLen);

Richard MacCutchan 18-Jul-19 9:05am

The assert seems to imply that your socket is invalid. So you must be doing something earlier in the code that is failing. The only way to trace these problems is by debugging step by step and checking every value as you go.

Member 14499788 18-Jul-19 9:15am

okay thankyou! I will try.

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Member 14499788 · Answer 1 · 2019-07-18T20:30:00

Solution 1

Finally I got the answer, I mistakenly created a Create() and Connect function for the socket accepting connection too.
Thankyour Richard for your suggestions!!

Cheers

Posted 18-Jul-19 20:30pm

Member 14499788