/// <summary>
/// Pushes a single packet onto the wire
/// </summary>
/// <returns>True if the packet was sent or dropped (i.e. "completed"), false if non-blocking return.</returns>
internal bool SendPacket(byte[] data, int length, NetworkEndPoint remoteEP, NetConnection connection)
{
if (length <= 0 || length > m_config.SendBufferSize)
{
string str = "Invalid packet size " + length + "; Must be between 1 and NetConfiguration.SendBufferSize - Invalid value: " + length;
LogWrite(str);
throw new NetException(str);
}
if (!m_isBound)
{
Start();
}
#if DEBUG || USE_RELEASE_SIMULATION
if (!m_suppressSimulatedLag)
{
bool send = SimulatedSendPacket(data, length, remoteEP);
if (!send)
{
m_statistics.CountPacketSent(length);
return(true);
}
}
#endif
int orgLength = length;
// TODO: cleanup fulhaacks: packets below 60 or 64 are padded, if too low sometimes even dropped!
if (length < 18 && data.Length - length >= 18) // 18 udp payload + 42 udp header = 60 bytes
{
for (int i = length; i < 18; i++)
{
data[i] = 0;
}
length = 18;
}
try
{
//m_socket.SendTo(data, 0, length, SocketFlags.None, remoteEP);
//the original CPU busy polling loop wasn't very acceptable in PikkoServer ^^
int bytesSent;
//do
//{
bytesSent = m_socket.SendPacket(data, 0, length, remoteEP);
//} while (bytesSent == 0);
if (bytesSent > 0 && bytesSent < orgLength)
{
Log.Warning(LogFlags.Socket, NetTime.Now, " (", DateTime.Now, "): Socket sent fewer bytes of the packet (", bytesSent, ") than requested (", orgLength, ")");
}
else if (bytesSent > length)
{
Log.Warning(LogFlags.Socket, NetTime.Now, " (", DateTime.Now, "): Socket sent more bytes of the packet (", bytesSent, ") than requested and padding (", length, ")");
}
//LogVerbose("Sent " + bytesSent + " bytes");
#if DEBUG || USE_RELEASE_STATISTICS
if (!m_suppressSimulatedLag && bytesSent > 0)
{
m_statistics.CountPacketSent(orgLength);
}
#endif
return(bytesSent > 0);
}
catch (SocketException sex)
{
if (sex.ErrorCode == 10035 || sex.SocketErrorCode == SocketError.WouldBlock)
{
// NOTE: add independent ability to log warnings instead of this hack.
Log.Warning(LogFlags.Socket, "Send buffer is full, if you see this too often it might be a sign that you need to increase the send buffer size: ", sex.Message);
#if PIKKO_BUILD
PikkoServer.PikkoStats.IncrementSendBufferDrops();
#endif
return(true); //drop packet instead of trying to resend it
}
if (sex.ErrorCode == 10065 || sex.SocketErrorCode == SocketError.HostUnreachable)
{
if (connection != null)
{
Log.Warning(LogFlags.Socket, "Disconnecting from ", remoteEP, " because it's not reachable or internet/network connection is unstable: ", sex.Message);
connection.Disconnect("Host Unreachable", 0, false, true);
}
else
{
Log.Warning(LogFlags.Socket, "Packet has been dropped because either ", remoteEP, " is unreachable or internet/network connection is unstable: ", sex.Message);
}
return(true);
}
/*
* if (sex.SocketErrorCode == SocketError.ConnectionReset ||
* sex.SocketErrorCode == SocketError.ConnectionRefused ||
* sex.SocketErrorCode == SocketError.ConnectionAborted)
* {
* LogWrite("Remote socket forcefully closed: " + sex.SocketErrorCode);
* // TODO: notify connection somehow?
* return;
* }
*/
throw new NetException(NetTime.Now + " (" + DateTime.Now + "): Could not send packet (" + length + " bytes) to " + remoteEP, sex);
}
catch (Exception ex)
{
throw new NetException(NetTime.Now + " (" + DateTime.Now + "): Could not send packet (" + length + " bytes) to " + remoteEP, ex);
}
}