1.添加cli

2.采用log4go
3.消除XOR的一个bug

Signed-off-by: dmy@lab <dmy@lab.com>

cli/cli.go

@@ -0,0 +1,15 @@
+package cli
+
+import (
+	"flag"
+)
+
+var DestIP string
+var DestPort int
+var ListenPort int
+
+func init() {
+	flag.StringVar(&DestIP, "destip", "", "Destination IP")
+	flag.IntVar(&DestPort, "desport", 0, "Destination Port")
+	flag.IntVar(&ListenPort, "listenport", 0, "Listen Port")
+}