Changeset 5621 for branches/HeuristicLab.Hive-3.4/sources/HeuristicLab.Clients.Hive.Slave/3.4/ConfigManager.cs

Timestamp:

03/07/11 16:15:55 (13 years ago)

Author:

ascheibe

Message:

#1233

• use mac address as Guid for Slaves (for now...)
• Slave Windows Service now also works if it can't write to an event source

File:

• branches/HeuristicLab.Hive-3.4/sources/HeuristicLab.Clients.Hive.Slave/3.4/ConfigManager.cs (modified) (2 diffs)

branches/HeuristicLab.Hive-3.4/sources/HeuristicLab.Clients.Hive.Slave/3.4/ConfigManager.cs

@@ -125 +125 @@
 
     public static Guid GetUniqueMachineId() {
-      // todo: instead of creating a new id, generate an ID from hardware IDs which is always the same for one machine
       if (Settings.Default.Guid == Guid.Empty) {
-        Guid id = Guid.NewGuid();
+        Guid id;
+        try {
+          id = GetUniqueMachineIdFromMac();
+        }
+        catch {
+          // fallback if something goes wrong...        
+          id = Guid.NewGuid();
+        }
+
         Settings.Default.Guid = id;
         Settings.Default.Save();
@@ -153 +160 @@
     }
 
+    /// <summary>
+    /// Generate a guid based on mac address of the first found nic (yes, mac addresses are not unique...).
+    /// Format:
+    /// 
+    ///  D1      D2  D3  Res.   D4
+    /// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+    /// |0 0 0 0|0 0|0 0|0 0 mac address|
+    /// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+    /// 
+    /// The mac address is saved in the last 48 bits of the Data 4 segment 
+    /// of the guid (first 2 bytes of Data 4 are reserved).
+    /// </summary>    
+    private static Guid GetUniqueMachineIdFromMac() {
+      ManagementClass mgtClass = new ManagementClass("Win32_NetworkAdapterConfiguration");
+      ManagementObjectCollection mgtCol = mgtClass.GetInstances();
+
+      foreach (ManagementObject mgtObj in mgtCol) {
+        foreach (var prop in mgtObj.Properties) {
+          if (prop.Value != null && prop.Name == "MACAddress") {
+            try {
+              //simply take the first nic
+              string mac = prop.Value.ToString();
+              byte[] b = new byte[8];
+              string[] macParts = mac.Split(':');
+              if (macParts.Length == 6) {
+                for (int i = 0; i < macParts.Length; i++) {
+                  b[i + 2] = (byte)((ParseNybble(macParts[i][0]) << 4) | ParseNybble(macParts[i][1]));
+                }
+
+                Guid guid = new Guid(0, 0, 0, b);
+                return guid;
+              } else
+                throw new Exception("Error getting mac addresse");
+            }
+            catch {
+              throw new Exception("Error getting mac addresse");
+            }
+          }
+        }
+      }
+      throw new Exception("Error getting mac addresse");
+    }
+
+    /// <summary>
+    /// return numeric value of a single hex-char
+    /// (see: http://stackoverflow.com/questions/854012/how-to-convert-hex-to-a-byte-array)
+    /// </summary>    
+    static int ParseNybble(char c) {
+      if (c >= '0' && c <= '9') {
+        return c - '0';
+      }
+      if (c >= 'A' && c <= 'F') {
+        return c - 'A' + 10;
+      }
+      if (c >= 'a' && c <= 'f') {
+        return c - 'a' + 10;
+      }
+      throw new ArgumentException("Invalid hex digit: " + c);
+    }
+
     private static long? GetWMIValue(string clazz, string property) {
       ManagementClass mgtClass = new ManagementClass(clazz);