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internal/dnsttcore/dns/fuzz.go

@@ -0,0 +1,23 @@
+//go:build gofuzz
+// +build gofuzz
+
+// Fuzzing driver for https://github.com/dvyukov/go-fuzz.
+// 	go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
+// 	$GOPATH/bin/go-fuzz-build
+// 	$GOPATH/bin/go-fuzz
+//
+// Related link: https://blog.cloudflare.com/dns-parser-meet-go-fuzzer/
+
+package dns
+
+func Fuzz(data []byte) int {
+	msg, err := MessageFromWireFormat(data)
+	if err != nil {
+		return 0
+	}
+	_, err = msg.WireFormat()
+	if err != nil {
+		panic(err)
+	}
+	return 1 // prioritize this input
+}