ActiveX and CSocket

[Bryan]

I have created an MFC ActiveX control. If I connect to my local machine on
some port, everything works fine. If I try to connect to a different
computer, I get an error (from CSocket.Create) that says "The requested
address is not valid in its context."
I know for a fact that the address is valid because I can have one of my
Java Programs connect just fine...

Is there just something about using an ActiveX control to create a socket
connection to an external computer?..

Any help would be appreciated.
Bryan

Here is a code snip:

BSTR CServiceCommCtr l::SendReceiveD ata(LPCTSTR HostName, long PortNumber,
LPCTSTR ToServer)
{
CString strResult;
// TODO: Add your dispatch handler code here

// Convert HostName to an IP address
hostent *h = NULL;
h = gethostbyname(H ostName);
if (h == NULL)
{
AfxMessageBox(" Could not resolve Host Name to IP
Address!",MB_OK |MB_ICONERROR);
return strResult.Alloc SysString();
}
CString szHostName = inet_ntoa(*(rei nterpret_cast<i n_addr*>(h->h_addr)));

// Create a socket connectionto HostName on Port Number. Send the ToServer
and return the response.
CSocket m_clientsock;
BOOL bError = false;
CString szErrorMsg = "";
CString szToServer = ToServer;
CString TV;
TV.Format(_T("% s%s"),szToServe r, "\r\n\r\n") ;

szToServer = TV;
//szToServer.Form at("%s%s",szToS erver, "\r\n\r\n") ;
int iPortNumber = PortNumber;

szErrorMsg.Form at("Establishin g connection to: %s\nOn Port: %d",szHostNam e,
PortNumber);
AfxMessageBox(s zErrorMsg);

// NOTE: This is where I keep getting the 10049 error
int ErrCode = m_clientsock.Cr eate(0,SOCK_STR EAM, szHostName);
if( ErrCode == 0 )
{
szErrorMsg.Form at(_T("Socket Error!\nError Code:
%d\n%d"),ErrCod e,GetLastError( ));

bError = true;
}

if (!bError)
{
// Connect to the Server on the specified port...
int connected = m_clientsock.Co nnect(szHostNam e,iPortNumber);
if (connected != 0)
{
// Send Data to Server
int iLen = szToServer.GetL ength();
int iSent = m_clientsock.Se nd(szToServer,i Len);

if (iSent==SOCKET_ ERROR)
{
szErrorMsg.Form at(_T("Server send error!\nError:
%d"),m_clientso ck.GetLastError ());
bError = true;
} else {
int iBufSize=10240; // Max Record Size...
int iRecvd;
char pBuf[10240];

iRecvd = m_clientsock.Re ceive(pBuf,iBuf Size); //get string from socket
if (iRecvd == SOCKET_ERROR)
{
szErrorMsg.Form at(_T("Server receive error!\nError:
%d"),m_clientso ck.GetLastError ());
bError = true;
} else {
// Set our member variable to the data received from the stream
pBuf[iRecvd]=0;
strResult = pBuf;
}
}

// Close Socket Connection
m_clientsock.Cl ose();
} else {
szErrorMsg.Form at(_T("Error connecting to the Host Server on the
specified port!\nError: %d\n\nHost: %s\nPort: %d\n\nContact Technical
Support with this message."),m_cl ientsock.GetLas tError(),HostNa me,
PortNumber);
bError = true;
}
}

if (bError)
{
AfxMessageBox(s zErrorMsg,MB_OK |MB_ICONERROR);
strResult = szErrorMsg;
}

return strResult.Alloc SysString();
}

[Bryan]

For anyone interested, the problem was solved by changing the CSocket.Create
with no parameters.

I was using:
int ErrCode = m_clientsock.Cr eate(0,SOCK_STR EAM, szHostName);

I changed it to:
int ErrCode = m_clientsock.Cr eate();

Why did this make a difference?.. All well, I'll just accept it and go
on...

Thanks to anyone who tried to look into this.
Bryan
"Bryan" <br*********@ho tmailX.comX> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

I have created an MFC ActiveX control. If I connect to my local machine on some port, everything works fine. If I try to connect to a different
computer, I get an error (from CSocket.Create) that says "The requested
address is not valid in its context."
I know for a fact that the address is valid because I can have one of my
Java Programs connect just fine...

Is there just something about using an ActiveX control to create a socket
connection to an external computer?..

Any help would be appreciated.
Bryan

Here is a code snip:

BSTR CServiceCommCtr l::SendReceiveD ata(LPCTSTR HostName, long PortNumber,
LPCTSTR ToServer)
{
CString strResult;
// TODO: Add your dispatch handler code here

// Convert HostName to an IP address
hostent *h = NULL;
h = gethostbyname(H ostName);
if (h == NULL)
{
AfxMessageBox(" Could not resolve Host Name to IP
Address!",MB_OK |MB_ICONERROR);
return strResult.Alloc SysString();
}
CString szHostName = inet_ntoa(*(rei nterpret_cast<i n_addr*>(h->h_addr)));

// Create a socket connectionto HostName on Port Number. Send the ToServer and return the response.
CSocket m_clientsock;
BOOL bError = false;
CString szErrorMsg = "";
CString szToServer = ToServer;
CString TV;
TV.Format(_T("% s%s"),szToServe r, "\r\n\r\n") ;

szToServer = TV;
//szToServer.Form at("%s%s",szToS erver, "\r\n\r\n") ;
int iPortNumber = PortNumber;

szErrorMsg.Form at("Establishin g connection to: %s\nOn Port: %d",szHostNam e, PortNumber);
AfxMessageBox(s zErrorMsg);

// NOTE: This is where I keep getting the 10049 error
int ErrCode = m_clientsock.Cr eate(0,SOCK_STR EAM, szHostName);
if( ErrCode == 0 )
{
szErrorMsg.Form at(_T("Socket Error!\nError Code:
%d\n%d"),ErrCod e,GetLastError( ));

bError = true;
}

if (!bError)
{
// Connect to the Server on the specified port...
int connected = m_clientsock.Co nnect(szHostNam e,iPortNumber);
if (connected != 0)
{
// Send Data to Server
int iLen = szToServer.GetL ength();
int iSent = m_clientsock.Se nd(szToServer,i Len);

if (iSent==SOCKET_ ERROR)
{
szErrorMsg.Form at(_T("Server send error!\nError:
%d"),m_clientso ck.GetLastError ());
bError = true;
} else {
int iBufSize=10240; // Max Record Size...
int iRecvd;
char pBuf[10240];

iRecvd = m_clientsock.Re ceive(pBuf,iBuf Size); //get string from socket
if (iRecvd == SOCKET_ERROR)
{
szErrorMsg.Form at(_T("Server receive error!\nError:
%d"),m_clientso ck.GetLastError ());
bError = true;
} else {
// Set our member variable to the data received from the stream
pBuf[iRecvd]=0;
strResult = pBuf;
}
}

// Close Socket Connection
m_clientsock.Cl ose();
} else {
szErrorMsg.Form at(_T("Error connecting to the Host Server on the
specified port!\nError: %d\n\nHost: %s\nPort: %d\n\nContact Technical
Support with this message."),m_cl ientsock.GetLas tError(),HostNa me,
PortNumber);
bError = true;
}
}

if (bError)
{
AfxMessageBox(s zErrorMsg,MB_OK |MB_ICONERROR);
strResult = szErrorMsg;
}

return strResult.Alloc SysString();
}