Hi*!
I am implementing IOCP server (for Windows OS) supporting SSL. For SSL
part i am trying to use OpenSSL's bio pairs. I have looked at the example in
ssltest.c. As i understand (please correct me if i am wrong) of the three
bios (s_ssl_bio, server, server_io) that get created in "doit_biopair"
function, the "server_io" bio is used to read/write "Encrypted" data & the
"s_ssl_bio" is used to read/write "UNEncrypted" data. I have setup my code
according to this principle. Now when the client connects, it sends some
"ssl-handshake" (Encrypted) data & I have to write it "server_io". Here is
how my function looks for writing to "server_io" BIO.
bool CSSLSession::OnRecv(const std::string& RecvData)
{
bool bRet = false;
char *pData = NULL;
int nRet = -1;
int nLen = -1;
nLen = BIO_ctrl_get_read_request(m_SessionInfo.ioBio);
if( !nLen )
{
bRet = true;
return bRet;
}
nRet = BIO_nwrite0(m_SessionInfo.ioBio, &pData);
if( 0 >= nRet || nLen > nRet || !pData )
{
return bRet;
}
nRet = nLen;
#pragma warning (disable : 4018)
if( nRet > RecvData.size() )
{
nRet = RecvData.size();
}
#pragma warning (default: 4018)
memcpy(pData, RecvData.data(), nRet);
nRet = BIO_nwrite(m_SessionInfo.ioBio, &pData, nRet);
BIO_flush(m_SessionInfo.ioBio);
bRet = true;
return bRet;
}
I am for the time being not handling the retry options (will implement
later). Now the problem is this call "nLen =
BIO_ctrl_get_read_request(m_SessionInfo.ioBio);" always return 0 & the
function returns after that. Shouldn't the SSL engine be wating for some
data on start of server side session?? since its the client who always sends
the handshake data first. Can anyone help me solve this problem??? I check
the return values while setting up ssl context and SSL objects and they all
are retuning success.
Thanks in Advance,
Regards,
Usman.
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