5 files changed, 100 insertions, 5 deletions

diff --git a/OpenSim/Services/LLLoginService/LLLoginResponse.cs b/OpenSim/Services/LLLoginService/LLLoginResponse.cs
index 01de159..6b3bc84 100644
--- a/OpenSim/Services/LLLoginService/LLLoginResponse.cs
+++ b/OpenSim/Services/LLLoginService/LLLoginResponse.cs
@@ -226,7 +226,8 @@ namespace OpenSim.Services.LLLoginService
         public LLLoginResponse(UserAccount account, AgentCircuitData aCircuit, GridUserInfo pinfo,
             GridRegion destination, List<InventoryFolderBase> invSkel, FriendInfo[] friendsList, ILibraryService libService,
             string where, string startlocation, Vector3 position, Vector3 lookAt, List<InventoryItemBase> gestures, string message,
-            GridRegion home, IPEndPoint clientIP, string mapTileURL, string profileURL, string openIDURL, string searchURL, string currency)
+            GridRegion home, IPEndPoint clientIP, string mapTileURL, string profileURL, string openIDURL, string searchURL, string currency,
+            string DSTZone)
             : this()
         {
             FillOutInventoryData(invSkel, libService);
@@ -255,7 +256,45 @@ namespace OpenSim.Services.LLLoginService
             FillOutRegionData(destination);
 
             FillOutSeedCap(aCircuit, destination, clientIP);
-            
+
+            switch (DSTZone)
+            {
+                case "none":
+                    DST = "N";
+                    break;
+                case "local":
+                    DST = TimeZone.CurrentTimeZone.IsDaylightSavingTime(DateTime.Now) ? "Y" : "N";
+                    break;
+                default:
+                    TimeZoneInfo dstTimeZone = null;
+                    string[] tzList = DSTZone.Split(';');
+
+                    foreach (string tzName in tzList)
+                    {
+                        try
+                        {
+                            dstTimeZone = TimeZoneInfo.FindSystemTimeZoneById(tzName);
+                        }
+                        catch (Exception e)
+                        {
+                            continue;
+                        }
+                        break;
+                    }
+
+                    if (dstTimeZone == null)
+                    {
+                        m_log.WarnFormat(
+                            "[LLOGIN RESPONSE]: No valid timezone found for DST in {0}, falling back to system time.", tzList);
+                        DST = TimeZone.CurrentTimeZone.IsDaylightSavingTime(DateTime.Now) ? "Y" : "N";
+                    }
+                    else
+                    {
+                        DST = dstTimeZone.IsDaylightSavingTime(DateTime.Now) ? "Y" : "N";
+                    }
+                
+                    break;
+            }
         }
 
         private void FillOutInventoryData(List<InventoryFolderBase> invSkel, ILibraryService libService)
diff --git a/OpenSim/Services/LLLoginService/LLLoginService.cs b/OpenSim/Services/LLLoginService/LLLoginService.cs
index db8a9cb..9acba11 100644
--- a/OpenSim/Services/LLLoginService/LLLoginService.cs
+++ b/OpenSim/Services/LLLoginService/LLLoginService.cs
@@ -82,6 +82,8 @@ namespace OpenSim.Services.LLLoginService
         protected string m_AllowedClients;
         protected string m_DeniedClients;
 
+        protected string m_DSTZone;
+
         IConfig m_LoginServerConfig;
 //        IConfig m_ClientsConfig;
 
@@ -118,6 +120,8 @@ namespace OpenSim.Services.LLLoginService
             m_AllowedClients = m_LoginServerConfig.GetString("AllowedClients", string.Empty);
             m_DeniedClients = m_LoginServerConfig.GetString("DeniedClients", string.Empty);
 
+            m_DSTZone = m_LoginServerConfig.GetString("DSTZone", "America/Los_Angeles;Pacific Standard Time");
+
             // Clean up some of these vars
             if (m_MapTileURL != String.Empty)
             {
@@ -240,6 +244,7 @@ namespace OpenSim.Services.LLLoginService
 
             m_log.InfoFormat("[LLOGIN SERVICE]: Login request for {0} {1} at {2} using viewer {3}, channel {4}, IP {5}, Mac {6}, Id0 {7}",
                 firstName, lastName, startLocation, clientVersion, channel, clientIP.Address.ToString(), mac, id0);
+            
             try
             {
                 //
@@ -416,8 +421,11 @@ namespace OpenSim.Services.LLLoginService
                 //
                 // Finally, fill out the response and return it
                 //
-                LLLoginResponse response = new LLLoginResponse(account, aCircuit, guinfo, destination, inventorySkel, friendsList, m_LibraryService,
-                    where, startLocation, position, lookAt, gestures, m_WelcomeMessage, home, clientIP, m_MapTileURL, m_ProfileURL, m_OpenIDURL, m_SearchURL, m_Currency);
+                LLLoginResponse response
+                    = new LLLoginResponse(
+                        account, aCircuit, guinfo, destination, inventorySkel, friendsList, m_LibraryService,
+                        where, startLocation, position, lookAt, gestures, m_WelcomeMessage, home, clientIP,
+                        m_MapTileURL, m_ProfileURL, m_OpenIDURL, m_SearchURL, m_Currency, m_DSTZone);
 
                 m_log.DebugFormat("[LLOGIN SERVICE]: All clear. Sending login response to client.");
                 return response;
@@ -431,7 +439,10 @@ namespace OpenSim.Services.LLLoginService
             }
         }
 
-        protected GridRegion FindDestination(UserAccount account, UUID scopeID, GridUserInfo pinfo, UUID sessionID, string startLocation, GridRegion home, out GridRegion gatekeeper, out string where, out Vector3 position, out Vector3 lookAt, out TeleportFlags flags)
+        protected GridRegion FindDestination(
+            UserAccount account, UUID scopeID, GridUserInfo pinfo, UUID sessionID, string startLocation,
+            GridRegion home, out GridRegion gatekeeper,
+            out string where, out Vector3 position, out Vector3 lookAt, out TeleportFlags flags)
         {
             flags = TeleportFlags.ViaLogin;
 
diff --git a/bin/Robust.HG.ini.example b/bin/Robust.HG.ini.example
index be75407..00e2fd7 100644
--- a/bin/Robust.HG.ini.example
+++ b/bin/Robust.HG.ini.example
@@ -275,6 +275,18 @@ ServiceConnectors = "8003/OpenSim.Server.Handlers.dll:AssetServiceConnector,8003
     ;AllowedClients = ""
     ;DeniedClients = ""
 
+    ;# {DSTZone} {} {Override Daylight Saving Time rules} {* none local} "America/Los_Angeles;Pacific Standard Time"
+    ;; Viewers do not receive timezone information from the server - almost all (?) default to Pacific Standard Time
+    ;; However, they do rely on the server to tell them whether it's Daylight Saving Time or not.
+    ;; Hence, calculating DST based on a different timezone can result in a misleading viewer display and inconsistencies between grids.
+    ;; By default, this setting uses various timezone names to calculate DST with regards to the viewer's standard PST.
+    ;; Options are 
+    ;;   "none"     no DST 
+    ;;   "local"    use the server's only timezone to calculate DST.  This is previous OpenSimulator behaviour.
+    ;;   "America/Los_Angeles;Pacific Standard Time" use these timezone names to look up Daylight savings.
+    ;;      'America/Los_Angeles' is used on Linux/Mac systems whilst 'Pacific Standard Time' is used on Windows
+    DSTZone = "America/Los_Angeles;Pacific Standard Time"
+
 [MapImageService]
     LocalServiceModule = "OpenSim.Services.MapImageService.dll:MapImageService"
         ; Set this if you want to change the default
diff --git a/bin/Robust.ini.example b/bin/Robust.ini.example
index 582af27..1c04ab5 100644
--- a/bin/Robust.ini.example
+++ b/bin/Robust.ini.example
@@ -250,6 +250,27 @@ ServiceConnectors = "8003/OpenSim.Server.Handlers.dll:AssetServiceConnector,8003
     ;AllowedClients = ""
     ;DeniedClients = ""
 
+    ;# {DSTZone} {} {Override Daylight Saving Time rules} {* none local} "America/Los_Angeles;Pacific Standard Time"
+    ;; Viewers do not listen to timezone sent by the server. They use Pacific Standard Time instead,
+    ;; but rely on the server to calculate Daylight Saving Time. Sending another DST than US Pacific
+    ;; would result in time inconsistencies between grids (during summer and around DST transition period)
+    ;;   default    let OpenSim calculate US Pacific DST
+    ;;   "none"     disable DST (equivallent to "local" with system set to GMT)
+    ;;   "local"    force legacy behaviour (using local system time to calculate DST)
+    ; DSTZone = "America/Los_Angeles;Pacific Standard Time"
+
+    ;# {DSTZone} {} {Override Daylight Saving Time rules} {* none local} "America/Los_Angeles;Pacific Standard Time"
+    ;; Viewers do not receive timezone information from the server - almost all (?) default to Pacific Standard Time
+    ;; However, they do rely on the server to tell them whether it's Daylight Saving Time or not.
+    ;; Hence, calculating DST based on a different timezone can result in a misleading viewer display and inconsistencies between grids.
+    ;; By default, this setting uses various timezone names to calculate DST with regards to the viewer's standard PST.
+    ;; Options are
+    ;;   "none"     no DST 
+    ;;   "local"    use the server's only timezone to calculate DST.  This is previous OpenSimulator behaviour.
+    ;;   "America/Los_Angeles;Pacific Standard Time" use these timezone names to look up Daylight savings.
+    ;;      'America/Los_Angeles' is used on Linux/Mac systems whilst 'Pacific Standard Time' is used on Windows
+    DSTZone = "America/Los_Angeles;Pacific Standard Time"
+
 [MapImageService]
     LocalServiceModule = "OpenSim.Services.MapImageService.dll:MapImageService"
         ; Set this if you want to change the default
diff --git a/bin/config-include/Standalone.ini b/bin/config-include/Standalone.ini
index d307387..74d9d2e 100644
--- a/bin/config-include/Standalone.ini
+++ b/bin/config-include/Standalone.ini
@@ -95,6 +95,18 @@
 
     WelcomeMessage = "Welcome, Avatar!"
 
+    ;# {DSTZone} {} {Override Daylight Saving Time rules} {* none local} "America/Los_Angeles;Pacific Standard Time"
+    ;; Viewers do not receive timezone information from the server - almost all (?) default to Pacific Standard Time
+    ;; However, they do rely on the server to tell them whether it's Daylight Saving Time or not.
+    ;; Hence, calculating DST based on a different timezone can result in a misleading viewer display and inconsistencies between grids.
+    ;; By default, this setting uses various timezone names to calculate DST with regards to the viewer's standard PST.
+    ;; Options are 
+    ;;   "none"     no DST 
+    ;;   "local"    use the server's only timezone to calculate DST.  This is previous OpenSimulator behaviour.
+    ;;   "America/Los_Angeles;Pacific Standard Time" use these timezone names to look up Daylight savings.
+    ;;      'America/Los_Angeles' is used on Linux/Mac systems whilst 'Pacific Standard Time' is used on Windows
+    DSTZone = "America/Los_Angeles;Pacific Standard Time"
+
 [MapImageService]
         LocalServiceModule = "OpenSim.Services.MapImageService.dll:MapImageService"
         ; in minutes