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// SslHTTPConnection.cpp
// Implements the cSslHTTPServerConnection class representing a HTTP connection made over a SSL link
#include "Globals.h"
#include "SslHTTPServerConnection.h"
#include "HTTPServer.h"
cSslHTTPServerConnection::cSslHTTPServerConnection(
cHTTPServer & a_HTTPServer,
const std::shared_ptr<const cSslConfig> & a_Config
) :
Super(a_HTTPServer), m_Ssl(64000)
{
if (a_Config != nullptr)
{
m_Ssl.Initialize(a_Config);
}
else
{
m_Ssl.Initialize(false);
}
}
cSslHTTPServerConnection::~cSslHTTPServerConnection()
{
m_Ssl.NotifyClose();
}
void cSslHTTPServerConnection::OnReceivedData(const char * a_Data, size_t a_Size)
{
// Process the received data:
const char * Data = a_Data;
size_t Size = a_Size;
for (;;)
{
// Try to write as many bytes into Ssl's "incoming" buffer as possible:
size_t BytesWritten = 0;
if (Size > 0)
{
BytesWritten = m_Ssl.WriteIncoming(Data, Size);
Data += BytesWritten;
Size -= BytesWritten;
}
// Try to read as many bytes from SSL's decryption as possible:
char Buffer[32000];
int NumRead = m_Ssl.ReadPlain(Buffer, sizeof(Buffer));
if (NumRead > 0)
{
Super::OnReceivedData(Buffer, static_cast<size_t>(NumRead));
// The link may have closed while processing the data, bail out:
return;
}
else if (NumRead == MBEDTLS_ERR_SSL_WANT_READ)
{
// SSL requires us to send data to peer first, do so by "sending" empty data:
SendData(nullptr, 0);
}
// If both failed, bail out:
if ((BytesWritten == 0) && (NumRead <= 0))
{
return;
}
}
}
void cSslHTTPServerConnection::SendData(const void * a_Data, size_t a_Size)
{
const char * OutgoingData = static_cast<const char *>(a_Data);
size_t pos = 0;
for (;;)
{
// Write as many bytes from our buffer to SSL's encryption as possible:
int NumWritten = 0;
if (pos < a_Size)
{
NumWritten = m_Ssl.WritePlain(OutgoingData + pos, a_Size - pos);
if (NumWritten > 0)
{
pos += static_cast<size_t>(NumWritten);
}
}
// Read as many bytes from SSL's "outgoing" buffer as possible:
char Buffer[32000];
size_t NumBytes = m_Ssl.ReadOutgoing(Buffer, sizeof(Buffer));
if (NumBytes > 0)
{
m_Link->Send(Buffer, NumBytes);
}
// If both failed, bail out:
if ((NumWritten <= 0) && (NumBytes == 0))
{
return;
}
}
}
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