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* Shielded against various forms of Malformed data crashes - if there is an error in packet creation, we just log and ignore it 

* If there's a Socket.AlreadyInProgress, just silently ignore this one
* Tried to refactor the Reset and BeginRecieve logic into something a little more readable, little less duplicated
0.6.0-stable
lbsa71 2008-08-09 05:26:33 +00:00
parent 87c5b0b926
commit 6849f45660
1 changed files with 70 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

194
OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
View File

@ -153,9 +153,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
int numBytes = 1;
bool ok = false;
try
{
numBytes = m_socket.EndReceiveFrom(result, ref epSender);
ok = true;
}
catch (SocketException e)
{
@ -165,149 +168,52 @@ namespace OpenSim.Region.ClientStack.LindenUDP
switch (e.SocketErrorCode)
{
case SocketError.AlreadyInProgress:
return;
case SocketError.NetworkReset:
case SocketError.ConnectionReset:
try
{
CloseEndPoint(epSender);
}
catch (Exception a)
{
m_log.Info("[UDPSERVER]: " + a.ToString());
}
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender,
ReceivedData, null);
// Ter: For some stupid reason ConnectionReset basically kills our async event structure..
// so therefore.. we've got to tell the server to BeginReceiveFrom again.
// This will happen over and over until we've gone through all packets
// sent to and from this particular user.
// Stupid I know..
// but Flusing the buffer would be even more stupid... so, we're stuck with this ugly method.
}
catch (SocketException)
{
}
break;
default:
try
{
CloseEndPoint(epSender);
}
catch (Exception)
{
//m_log.Info("[UDPSERVER]" + a.ToString());
}
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender,
ReceivedData, null);
// Ter: For some stupid reason ConnectionReset basically kills our async event structure..
// so therefore.. we've got to tell the server to BeginReceiveFrom again.
// This will happen over and over until we've gone through all packets
// sent to and from this particular user.
// Stupid I know..
// but Flusing the buffer would be even more stupid... so, we're stuck with this ugly method.
}
catch (SocketException e2)
{
m_log.Error("[UDPSERVER]: " + e2.ToString());
}
// Here's some reference code! :D
// Shutdown and restart the UDP listener! hehe
// Shiny
//Server.Shutdown(SocketShutdown.Both);
//CloseEndPoint(epSender);
//ServerListener();
break;
throw;
}
//return;
}
catch (ObjectDisposedException e)
{
m_log.Debug("[UDPSERVER]: " + e.ToString());
m_log.DebugFormat("ObjectDisposedException: Object {0} disposed.", e.ObjectName);
// Uhh, what object, and why? this needs better handling.
}
if (ok)
{
epProxy = epSender;
if (proxyPortOffset != 0)
{
epSender = ProxyCodec.DecodeProxyMessage(RecvBuffer, ref numBytes);
}
int packetEnd = numBytes - 1;
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender,
ReceivedData, null);
// Ter: For some stupid reason ConnectionReset basically kills our async event structure..
// so therefore.. we've got to tell the server to BeginReceiveFrom again.
// This will happen over and over until we've gone through all packets
// sent to and from this particular user.
// Stupid I know..
// but Flusing the buffer would be even more stupid... so, we're stuck with this ugly method.
packet = PacketPool.Instance.GetPacket(RecvBuffer, ref packetEnd, ZeroBuffer);
}
catch (SocketException e2)
catch (MalformedDataException e)
{
m_log.Error("[UDPSERVER]: " + e2.ToString());
m_log.DebugFormat("Dropped Malformed Packet due to MalformedDataException: {0}", e.StackTrace);
}
catch (ObjectDisposedException)
catch (IndexOutOfRangeException e)
{
m_log.DebugFormat("Dropped Malformed Packet due to IndexOutOfRangeException: {0}", e.StackTrace);
}
//return;
}
//System.Console.WriteLine("UDPServer : recieved message from {0}", epSender.ToString());
epProxy = epSender;
if (proxyPortOffset != 0)
{
epSender = ProxyCodec.DecodeProxyMessage(RecvBuffer, ref numBytes);
}
int packetEnd = numBytes - 1;
try
{
packet = PacketPool.Instance.GetPacket(RecvBuffer, ref packetEnd, ZeroBuffer);
}
catch (Exception e)
{
m_log.Debug("[UDPSERVER]: " + e.ToString());
}
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
}
catch (SocketException)
{
try
catch (Exception e)
{
CloseEndPoint(epSender);
}
catch (Exception a)
{
m_log.Info("[UDPSERVER]: " + a.ToString());
}
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender,
ReceivedData, null);
// Ter: For some stupid reason ConnectionReset basically kills our async event structure..
// so therefore.. we've got to tell the server to BeginReceiveFrom again.
// This will happen over and over until we've gone through all packets
// sent to and from this particular user.
// Stupid I know..
// but Flusing the buffer would be even more stupid... so, we're stuck with this ugly method.
}
catch (SocketException e5)
{
m_log.Error("[UDPSERVER]: " + e5.ToString());
m_log.Debug("[UDPSERVER]: " + e.ToString());
}
}
catch (ObjectDisposedException)
{
}
BeginReceive();
if (packet != null)
{
try
@ -360,7 +266,47 @@ namespace OpenSim.Region.ClientStack.LindenUDP
}
}
}
}
private void BeginReceive()
{
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
}
catch (SocketException)
{
ResetEndPoint();
}
}
private void ResetEndPoint()
{
try
{
CloseEndPoint(epSender);
}
catch (Exception a)
{
m_log.Info("[UDPSERVER]: " + a.ToString());
}
try
{
m_socket.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender,
ReceivedData, null);
// Ter: For some stupid reason ConnectionReset basically kills our async event structure..
// so therefore.. we've got to tell the server to BeginReceiveFrom again.
// This will happen over and over until we've gone through all packets
// sent to and from this particular user.
// Stupid I know..
// but Flusing the buffer would be even more stupid... so, we're stuck with this ugly method.
}
catch (SocketException e)
{
m_log.DebugFormat("[UDPSERVER]: Exception {0} : {1}", e.Message, e.StackTrace );
}
}
private void CloseEndPoint(EndPoint sender)