Tun/tap: Modified MAC address generation.

- Added validation for Most Significant Byte.

Change-Id: I6e1cb112239df331a275ebcd3f8d16d5a5f50f58
Signed-off-by: minkee.lee <minkee.lee@samsung.com>

diff --git a/common-project/src/org/tizen/emulator/manager/ui/detail/item/property/NetMacViewItem.java b/common-project/src/org/tizen/emulator/manager/ui/detail/item/property/NetMacViewItem.java
index 05df721..ce82f13 100644 (file)
--- a/common-project/src/org/tizen/emulator/manager/ui/detail/item/property/NetMacViewItem.java
+++ b/common-project/src/org/tizen/emulator/manager/ui/detail/item/property/NetMacViewItem.java
@@ -119,12 +119,18 @@ public class NetMacViewItem extends TextViewItem {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < 12; i++) {
                        sb.append(MAC_CHAR[rd.nextInt(15)]);
-                       if (i == 1) { // First 2 byte must be EVEN.
-                               if ((Integer.parseInt(sb.toString(), 16) % 2) == 1) {
-                                       sb.delete(0, sb.length());
-                                       i = -1;
-                                       continue;
+                       if (i == 1) {
+                               // Most significant byte should satisfy following conditions.
+                               //  - 1st bit = 0 (least significant bit)
+                               //  - 2nd bit = 1
+                               int firstByteInt = Integer.parseInt(sb.toString(), 16);
+                               firstByteInt &= 252; // set last two bit zero.
+                               firstByteInt |= 2;  // set last two bit '10'.
+                               StringBuilder hex = new StringBuilder(Integer.toHexString(firstByteInt));
+                               if (hex.length() < 2) {
+                                       hex.insert(0, "0"); // padding zero.
                                }
+                               sb.replace(0, 2, hex.toString());
                        }
                        if (i > 0 && i < 11 && (i % 2 == 1)) {
                                sb.append(":");