base: add MAC address firewall [1/2]

Signed-off-by: cjybyjk <cjybyjk@zjnu.edu.cn>
Change-Id: I2052c7f64d1cb7d9e0907b60cc144f172d2f4bfb

Author: cjybyjk

core/java/android/os/INetworkManagementService.aidl

@@ -323,6 +323,7 @@ interface INetworkManagementService
     void setFirewallInterfaceRule(String iface, boolean allow);
     void setFirewallUidRule(int chain, int uid, int rule);
     void setFirewallUidRules(int chain, in int[] uids, in int[] rules);
+    void setFirewallMACAddressRule(String macAddr, boolean allow);
     void setFirewallChainEnabled(int chain, boolean enable);
 
     /**

services/core/java/com/android/server/NetworkManagementService.java

@@ -1600,6 +1600,17 @@ public void setFirewallInterfaceRule(String iface, boolean allow) {
         }
     }
 
+    @Override
+    public void setFirewallMACAddressRule(String macAddr, boolean allow) {
+        enforceSystemUid();
+        try {
+            mNetdService.firewallSetMACAddressRule(macAddr,
+                    allow ? INetd.FIREWALL_RULE_ALLOW : INetd.FIREWALL_RULE_DENY);
+        } catch (RemoteException | ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
     private void closeSocketsForFirewallChainLocked(int chain, String chainName) {
         // UID ranges to close sockets on.
         UidRangeParcel[] ranges;