VpnService: stop VPN when unknown DNS servers show up. (fa1bb594) · Commits · e / os / android_frameworks_native

vpn/java/com/android/server/vpn/VpnService.java

+10 −8

Original line number	Diff line number	Diff line
		@@ -325,7 +325,7 @@ abstract class VpnService<E extends VpnProfile> {

		if (heavyCheck) {
		i = 10;
		if (checkConnectivity()) checkDns();
		checkConnectivity();
		}
		long t = 1000L - System.currentTimeMillis() + now;
		if (t > 100L) VpnService.this.wait(t);
		@@ -356,22 +356,24 @@ abstract class VpnService<E extends VpnProfile> {
		}

		// returns false if vpn connectivity is broken
		private boolean checkConnectivity() {
		if (mDaemons.anyDaemonStopped() \|\| isLocalIpChanged()) {
		private void checkConnectivity() {
		if (mDaemons.anyDaemonStopped() \|\| isLocalIpChanged() \|\| isDnsChanged()) {
		onError(new IOException("Connectivity lost"));
		return false;
		} else {
		return true;
		}
		}

		private void checkDns() {
		private boolean isDnsChanged() {
		String dns1 = SystemProperties.get(DNS1);
		String vpnDns1 = SystemProperties.get(VPN_DNS1);
		if (!dns1.equals(vpnDns1) && dns1.equals(mOriginalDns1)) {
		if (dns1.equals(vpnDns1)) {
		return false;
		}
		if (dns1.equals(mOriginalDns1)) {
		// dhcp expires?
		setVpnDns();
		return false;
		}
		return true;
		}

		private boolean isLocalIpChanged() {