Handle corrupted DNS message with incomplete header (d64b7e97) · Commits · e / os / PrivacyModule TrackerFilter

app/src/main/java/dnsfilter/SimpleDNSMessage.java

+6 −1

Original line number	Diff line number	Diff line
		@@ -18,9 +18,14 @@ public class SimpleDNSMessage {


		public SimpleDNSMessage(byte[] data, int offs, int length) throws IOException {

		this.data = data;
		this.offs = offs;
		this.length = length;

		if (length < 12)
		return; //not a valid message, incomplete header

		rqFlgs = data[offs+2]&0xFF;
		resFlgs = data[offs+3]&0xFF;

		@@ -34,7 +39,7 @@ public class SimpleDNSMessage {
		}

		public boolean isStandardQuery() {
		return ( (rqFlgs >> 3) == 0);
		return ( length >= 12 && (rqFlgs >> 3) == 0);
		}

		public Object[] getQueryData() {