Refactor(tunnel): using parseAddr

tunnel/util.go

@@ -0,0 +1,20 @@
+package tunnel
+
+import (
+	"net"
+	"strconv"
+)
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+// parseAddr parses address to IP and port.
+func parseAddr(addr string) (net.IP, uint16) {
+	host, portStr, _ := net.SplitHostPort(addr)
+	portInt, _ := strconv.ParseUint(portStr, 10, 16)
+	return net.ParseIP(host), uint16(portInt)
+}