/// <summary>
/// Attempts to extract SIP messages from the data that has been received on the SIP stream connection.
/// </summary>
/// <param name="recvChannel">The receiving SIP channel.</param>
/// <param name="buffer">The buffer holding the current data from the stream. Note that the buffer can
/// stretch over multiple receives.</param>
/// <param name="bytesRead">The bytes that were read by the latest receive operation (the new bytes available).</param>
public void ExtractSIPMessages(SIPChannel recvChannel, byte[] buffer, int bytesRead)
{
RecvEndPosn += bytesRead;
int bytesSkipped = 0;
byte[] sipMsgBuffer = SIPMessageBuffer.ParseSIPMessageFromStream(buffer, RecvStartPosn, RecvEndPosn, out bytesSkipped);
while (sipMsgBuffer != null)
{
// A SIP message is available.
if (SIPMessageReceived != null)
{
LastTransmission = DateTime.Now;
SIPEndPoint localEndPoint = new SIPEndPoint(ConnectionProtocol, StreamSocket.LocalEndPoint as IPEndPoint, recvChannel.ID, ConnectionID);
SIPEndPoint remoteEndPoint = new SIPEndPoint(ConnectionProtocol, RemoteEndPoint, recvChannel.ID, ConnectionID);
SIPMessageReceived(recvChannel, localEndPoint, remoteEndPoint, sipMsgBuffer);
}
RecvStartPosn += (sipMsgBuffer.Length + bytesSkipped);
if (RecvStartPosn == RecvEndPosn)
{
// All data has been successfully extracted from the receive buffer.
RecvStartPosn = RecvEndPosn = 0;
break;
}
else
{
// Try and extract another SIP message from the receive buffer.
sipMsgBuffer = SIPMessageBuffer.ParseSIPMessageFromStream(buffer, RecvStartPosn, RecvEndPosn, out bytesSkipped);
}
}
}
/// <summary>
/// Attempts to extract SIP messages from the data that has been received on the client web socket SIP stream connection.
/// </summary>
/// <param name="recvChannel">The receiving SIP channel.</param>
/// <param name="clientConn">The web socket client connection properties including pending receive buffer</param>
/// <param name="buffer">The buffer holding the current data from the stream. Note that the buffer can
/// stretch over multiple receives.</param>
/// <param name="bytesRead">The bytes that were read by the latest receive operation (the new bytes available).</param>
private void ExtractSIPMessages(SIPChannel recvChannel, ClientWebSocketConnection clientConn,
ArraySegment <byte> buffer, int bytesRead)
{
if (bytesRead + clientConn.RecvEndPosn > clientConn.PendingReceiveBuffer.Length)
{
// Don't have enough space for the read. Throw away the pending buffer and hope the SIP transaction is re-attempted.
clientConn.RecvStartPosn = clientConn.RecvEndPosn = 0;
}
Buffer.BlockCopy(buffer.ToArray(), 0, clientConn.PendingReceiveBuffer, clientConn.RecvEndPosn, bytesRead);
clientConn.RecvEndPosn += bytesRead;
int bytesSkipped = 0;
byte[] sipMsgBuffer = SIPMessageBuffer.ParseSIPMessageFromStream(clientConn.PendingReceiveBuffer,
clientConn.RecvStartPosn, clientConn.RecvEndPosn, out bytesSkipped);
while (sipMsgBuffer != null)
{
// A SIP message is available.
if (SIPMessageReceived != null)
{
clientConn.LastTransmission = DateTime.Now;
SIPMessageReceived(recvChannel, clientConn.LocalEndPoint, clientConn.RemoteEndPoint, sipMsgBuffer)
.Wait();
}
clientConn.RecvStartPosn += (sipMsgBuffer.Length + bytesSkipped);
if (clientConn.RecvStartPosn == clientConn.RecvEndPosn)
{
// All data has been successfully extracted from the receive buffer.
clientConn.RecvStartPosn = clientConn.RecvEndPosn = 0;
break;
}
else
{
// Try and extract another SIP message from the receive buffer.
sipMsgBuffer = SIPMessageBuffer.ParseSIPMessageFromStream(clientConn.PendingReceiveBuffer,
clientConn.RecvStartPosn, clientConn.RecvEndPosn, out bytesSkipped);
}
}
}