From db4ca57590db44aba7d19530285091c7ea4c082c Mon Sep 17 00:00:00 2001
From: Justin Clark-Casey (justincc)
Date: Tue, 16 Oct 2012 21:55:00 +0100
Subject: Make it possible to separate start and stop lludp packet processing
 from the console for debug processes.

This is controlled via the "debug lludp start <in|out|all>" and "debug lludp stop <in|out|all>" region console commands.
The command "debug lludp status" will show current status.
---
 .../ClientStack/Linden/UDP/OpenSimUDPBase.cs       | 44 +++++++++++++---------
 1 file changed, 27 insertions(+), 17 deletions(-)

(limited to 'OpenSim/Region/ClientStack/Linden/UDP/OpenSimUDPBase.cs')

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/OpenSimUDPBase.cs b/OpenSim/Region/ClientStack/Linden/UDP/OpenSimUDPBase.cs
index 039379d..828c23c 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/OpenSimUDPBase.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/OpenSimUDPBase.cs
@@ -58,11 +58,12 @@ namespace OpenMetaverse
         /// <summary>Flag to process packets asynchronously or synchronously</summary>
         private bool m_asyncPacketHandling;
 
-        /// <summary>The all important shutdown flag</summary>
-        private volatile bool m_shutdownFlag = true;
+        /// <summary>Returns true if the server is currently listening for inbound packets, otherwise false</summary>
+        public bool IsRunningInbound { get; private set; }
 
-        /// <summary>Returns true if the server is currently listening, otherwise false</summary>
-        public bool IsRunning { get { return !m_shutdownFlag; } }
+        /// <summary>Returns true if the server is currently sending outbound packets, otherwise false</summary>
+        /// <remarks>If IsRunningOut = false, then any request to send a packet is simply dropped.</remarks>
+        public bool IsRunningOutbound { get; private set; }
 
         /// <summary>
         /// Default constructor
@@ -76,7 +77,7 @@ namespace OpenMetaverse
         }
 
         /// <summary>
-        /// Start the UDP server
+        /// Start inbound UDP packet handling.
         /// </summary>
         /// <param name="recvBufferSize">The size of the receive buffer for 
         /// the UDP socket. This value is passed up to the operating system 
@@ -91,11 +92,11 @@ namespace OpenMetaverse
         /// manner (not throwing an exception when the remote side resets the
         /// connection). This call is ignored on Mono where the flag is not
         /// necessary</remarks>
-        public void Start(int recvBufferSize, bool asyncPacketHandling)
+        public void StartInbound(int recvBufferSize, bool asyncPacketHandling)
         {
             m_asyncPacketHandling = asyncPacketHandling;
 
-            if (m_shutdownFlag)
+            if (!IsRunningInbound)
             {
                 const int SIO_UDP_CONNRESET = -1744830452;
 
@@ -127,8 +128,7 @@ namespace OpenMetaverse
 
                 m_udpSocket.Bind(ipep);
 
-                // we're not shutting down, we're starting up
-                m_shutdownFlag = false;
+                IsRunningInbound = true;
 
                 // kick off an async receive.  The Start() method will return, the
                 // actual receives will occur asynchronously and will be caught in
@@ -138,28 +138,38 @@ namespace OpenMetaverse
         }
 
         /// <summary>
-        /// Stops the UDP server
+        /// Start outbound UDP packet handling.
         /// </summary>
-        public void Stop()
+        public void StartOutbound()
         {
-            if (!m_shutdownFlag)
+            IsRunningOutbound = true;
+        }
+
+        public void StopInbound()
+        {
+            if (IsRunningInbound)
             {
                 // wait indefinitely for a writer lock.  Once this is called, the .NET runtime
                 // will deny any more reader locks, in effect blocking all other send/receive
-                // threads.  Once we have the lock, we set shutdownFlag to inform the other
+                // threads.  Once we have the lock, we set IsRunningInbound = false to inform the other
                 // threads that the socket is closed.
-                m_shutdownFlag = true;
+                IsRunningInbound = false;
                 m_udpSocket.Close();
             }
         }
 
+        public void StopOutbound()
+        {
+            IsRunningOutbound = false;
+        }
+
         private void AsyncBeginReceive()
         {
             // allocate a packet buffer
             //WrappedObject<UDPPacketBuffer> wrappedBuffer = Pool.CheckOut();
             UDPPacketBuffer buf = new UDPPacketBuffer();
 
-            if (!m_shutdownFlag)
+            if (IsRunningInbound)
             {
                 try
                 {
@@ -212,7 +222,7 @@ namespace OpenMetaverse
         {
             // Asynchronous receive operations will complete here through the call
             // to AsyncBeginReceive
-            if (!m_shutdownFlag)
+            if (IsRunningInbound)
             {
                 // Asynchronous mode will start another receive before the
                 // callback for this packet is even fired. Very parallel :-)
@@ -252,7 +262,7 @@ namespace OpenMetaverse
 
         public void AsyncBeginSend(UDPPacketBuffer buf)
         {
-            if (!m_shutdownFlag)
+            if (IsRunningOutbound)
             {
                 try
                 {
-- 
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