public void StartPacket(TdsPacketType type)
{
if (type != TdsPacketType.Cancel && inBufferIndex != inBufferLength)
{
inBufferIndex = inBufferLength;
}
packetType = type;
nextOutBufferIndex = headerLength;
}
public void SendPacket()
{
// Reset connection flag is only valid for SQLBatch/RPC/DTC messages
if (packetType != TdsPacketType.Query && packetType != TdsPacketType.RPC)
{
connReset = false;
}
SendPhysicalPacket(true);
nextOutBufferIndex = 0;
packetType = TdsPacketType.None;
// Reset connection-reset flag to false - as any exception would anyway close
// the whole connection
connReset = false;
packetsSent = 1;
}
public void OnReadPacketCallback(IAsyncResult socketAsyncResult)
{
TdsAsyncResult ar = (TdsAsyncResult)socketAsyncResult.AsyncState;
int nread = stream.EndRead(socketAsyncResult);
int n;
while (nread < 8)
{
n = Read(tmpBuf, nread, 8 - nread);
if (n <= 0)
{
socket = null;
stream.Close();
throw new IOException(n == 0 ? "Connection lost" : "Connection error");
}
nread += n;
}
TdsPacketType packetType = (TdsPacketType)tmpBuf[0];
if (packetType != TdsPacketType.Logon && packetType != TdsPacketType.Query && packetType != TdsPacketType.Reply)
{
throw new Exception(String.Format("Unknown packet type {0}", tmpBuf[0]));
}
// figure out how many bytes are remaining in this packet.
int len = Ntohs(tmpBuf, 2) - 8;
if (len >= inBuffer.Length)
{
inBuffer = new byte[len];
}
if (len < 0)
{
throw new Exception(String.Format("Confused by a length of {0}", len));
}
GetPhysicalPacketData(len);
int value = len + 8;
ar.ReturnValue = ((object)value); // packet size
ar.MarkComplete();
}
private int GetPhysicalPacketHeader()
{
int nread = 0;
int n;
// read the header
while (nread < 8)
{
n = Read(tmpBuf, nread, 8 - nread);
if (n <= 0)
{
socket = null;
stream.Close();
throw new IOException(n == 0 ? "Connection lost" : "Connection error");
}
nread += n;
}
TdsPacketType packetType = (TdsPacketType)tmpBuf[0];
if (packetType != TdsPacketType.Logon && packetType != TdsPacketType.Query && packetType != TdsPacketType.Reply)
{
throw new Exception(String.Format("Unknown packet type {0}", tmpBuf[0]));
}
// figure out how many bytes are remaining in this packet.
int len = Ntohs(tmpBuf, 2) - 8;
if (len >= inBuffer.Length)
{
inBuffer = new byte[len];
}
if (len < 0)
{
throw new Exception(String.Format("Confused by a length of {0}", len));
}
return(len);
}
public void StartPacket (TdsPacketType type)
{
if (type != TdsPacketType.Cancel && inBufferIndex != inBufferLength)
inBufferIndex = inBufferLength;
packetType = type;
nextOutBufferIndex = headerLength;
}
public void SendPacket ()
{
// Reset connection flag is only valid for SQLBatch/RPC/DTC messages
if (packetType != TdsPacketType.Query && packetType != TdsPacketType.RPC)
connReset = false;
SendPhysicalPacket (true);
nextOutBufferIndex = 0;
packetType = TdsPacketType.None;
// Reset connection-reset flag to false - as any exception would anyway close
// the whole connection
connReset = false;
packetsSent = 1;
}
public void SendPacket ()
{
SendPhysicalPacket (true);
nextOutBufferIndex = 0;
packetType = TdsPacketType.None;
}
