From e47608fc62647a28be91dd9caf6e446826fdb54c Mon Sep 17 00:00:00 2001
From: Diva Canto
Date: Wed, 18 Aug 2010 16:22:50 -0700
Subject: One more go at GetExternalIpOf(user). Addresses mantis #4955 and
 #4943. (Files .xml and .txt also want to be committed)

---
 OpenSim/Framework/NetworkUtil.cs | 68 +++++++++++++++++++++++-----------------
 1 file changed, 40 insertions(+), 28 deletions(-)

(limited to 'OpenSim/Framework')

diff --git a/OpenSim/Framework/NetworkUtil.cs b/OpenSim/Framework/NetworkUtil.cs
index 831ff70..5649131 100644
--- a/OpenSim/Framework/NetworkUtil.cs
+++ b/OpenSim/Framework/NetworkUtil.cs
@@ -274,37 +274,49 @@ namespace OpenSim.Framework
                 }
             }
 
-            // Check for same LAN segment
-            foreach (KeyValuePair<IPAddress, IPAddress> subnet in m_subnets)
+            // Check for private networks
+            if (user.ToString().StartsWith("192.168"))
             {
-                byte[] subnetBytes = subnet.Value.GetAddressBytes();
-                byte[] localBytes = subnet.Key.GetAddressBytes();
-                byte[] destBytes = user.GetAddressBytes();
-
-                if (subnetBytes.Length != destBytes.Length || subnetBytes.Length != localBytes.Length)
-                    return user;
-
-                bool valid = true;
-
-                for (int i = 0; i < subnetBytes.Length; i++)
-                {
-                    if ((localBytes[i] & subnetBytes[i]) != (destBytes[i] & subnetBytes[i]))
-                    {
-                        valid = false;
-                        break;
-                    }
-                }
-
-                if (subnet.Key.AddressFamily != AddressFamily.InterNetwork)
-                    valid = false;
-
-                if (valid)
-                {
-                    m_log.Info("[NetworkUtil] Local LAN user detected, sending '" + externalIPAddress + "' instead of '" + user + "'");
-                    return externalIPAddress;
-                }
+                m_log.Info("[NetworkUtil] Private network user detected, sending '" + externalIPAddress + "' instead of '" + user + "'");
+                return externalIPAddress;
             }
 
+            // We may need to do more fancy configuration-based checks... I'm not entirely sure there is
+            // a 100% algorithmic manner of dealing with all the network setups out there. This code
+            // will evolve as people bump into problems.
+
+            //// Check for same LAN segment -- I don't think we want to do this in general. Leaving it here
+            //// for now as a reminder
+            //foreach (KeyValuePair<IPAddress, IPAddress> subnet in m_subnets)
+            //{
+            //    byte[] subnetBytes = subnet.Value.GetAddressBytes();
+            //    byte[] localBytes = subnet.Key.GetAddressBytes();
+            //    byte[] destBytes = user.GetAddressBytes();
+
+            //    if (subnetBytes.Length != destBytes.Length || subnetBytes.Length != localBytes.Length)
+            //        return user;
+
+            //    bool valid = true;
+
+            //    for (int i = 0; i < subnetBytes.Length; i++)
+            //    {
+            //        if ((localBytes[i] & subnetBytes[i]) != (destBytes[i] & subnetBytes[i]))
+            //        {
+            //            valid = false;
+            //            break;
+            //        }
+            //    }
+
+            //    if (subnet.Key.AddressFamily != AddressFamily.InterNetwork)
+            //        valid = false;
+
+            //    if (valid)
+            //    {
+            //        m_log.Info("[NetworkUtil] Local LAN user detected, sending '" + externalIPAddress + "' instead of '" + user + "'");
+            //        return externalIPAddress;
+            //    }
+            //}
+
             // Otherwise, return user address
             return user;
         }
-- 
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