feat: build input features

pkg/ussdgw/conf/iptrans.conf

@@ -0,0 +1,33 @@
+#ipconfig
+#port=type,num,interface
+#type=UDP/TCP
+#num=0-6
+#interface=BUFFER/DIRECT
+
+4950=UDP,6,DIRECT
+4951=UDP,0,BUFFER
+4952=UDP,3,BUFFER
+4953=UDP,3,BUFFER
+4954=UDP,3,BUFFER
+4955=UDP,3,BUFFER
+4956=UDP,3,BUFFER
+4957=UDP,4,BUFFER
+4958=UDP,0,BUFFER
+4959=UDP,2,BUFFER
+4960=UDP,3,BUFFER
+4961=UDP,2,BUFFER
+4962=UDP,0,BUFFER
+4963=UDP,3,BUFFER
+4964=UDP,3,BUFFER
+4965=TCP,3,BUFFER
+4966=UDP,3,DIRECT
+4967=UDP,3,DIRECT
+4968=UDP,2,BUFFER
+4969=UDP,3,BUFFER
+4970=UDP,3,BUFFER
+4971=UDP,3,BUFFER
+4972=UDP,2,BUFFER
+4973=UDP,3,BUFFER
+[port transfer]
+4966=2727
+4967=2427