Merge "Followup to CL 1103896" (54bb8a16) · Commits · e / os / android_frameworks_base

core/java/android/net/MacAddress.java

+12 −13

Original line number	Diff line number	Diff line
		@@ -85,6 +85,9 @@ public final class MacAddress implements Parcelable {
		private static final long OUI_MASK = MacAddress.fromString("ff:ff:ff:0:0:0").mAddr;
		private static final long NIC_MASK = MacAddress.fromString("0:0:0:ff:ff:ff").mAddr;
		private static final MacAddress BASE_GOOGLE_MAC = MacAddress.fromString("da:a1:19:0:0:0");
		/ Default wifi MAC address used for a special purpose /
		private static final MacAddress DEFAULT_MAC_ADDRESS =
		MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);

		// Internal representation of the MAC address as a single 8 byte long.
		// The encoding scheme sets the two most significant bytes to 0. The 6 bytes of the
		@@ -361,16 +364,7 @@ public final class MacAddress implements Parcelable {
		* @hide
		*/
		public static @NonNull MacAddress createRandomUnicastAddress() {
		SecureRandom r = new SecureRandom();
		long addr = r.nextLong() & VALID_LONG_MASK;
		addr \|= LOCALLY_ASSIGNED_MASK;
		addr &= ~MULTICAST_MASK;
		MacAddress mac = new MacAddress(addr);
		// WifiInfo.DEFAULT_MAC_ADDRESS is being used for another purpose, so do not use it here.
		if (mac.toString().equals(WifiInfo.DEFAULT_MAC_ADDRESS)) {
		return createRandomUnicastAddress();
		}
		return mac;
		return createRandomUnicastAddress(null, new SecureRandom());
		}

		/**
		@@ -380,18 +374,23 @@ public final class MacAddress implements Parcelable {
		* The locally assigned bit is always set to 1. The multicast bit is always set to 0.
		*
		* @param base a base MacAddress whose OUI is used for generating the random address.
		* If base == null then the OUI will also be randomized.
		* @param r a standard Java Random object used for generating the random address.
		* @return a random locally assigned MacAddress.
		*
		* @hide
		*/
		public static @NonNull MacAddress createRandomUnicastAddress(MacAddress base, Random r) {
		long addr = (base.mAddr & OUI_MASK) \| (NIC_MASK & r.nextLong());
		long addr;
		if (base == null) {
		addr = r.nextLong() & VALID_LONG_MASK;
		} else {
		addr = (base.mAddr & OUI_MASK) \| (NIC_MASK & r.nextLong());
		}
		addr \|= LOCALLY_ASSIGNED_MASK;
		addr &= ~MULTICAST_MASK;
		MacAddress mac = new MacAddress(addr);
		// WifiInfo.DEFAULT_MAC_ADDRESS is being used for another purpose, so do not use it here.
		if (mac.toString().equals(WifiInfo.DEFAULT_MAC_ADDRESS)) {
		if (mac.equals(DEFAULT_MAC_ADDRESS)) {
		return createRandomUnicastAddress(base, r);
		}
		return mac;