add initial framework

udp_bridge.h

@@ -0,0 +1,14 @@
+#ifndef _UDP_BRIDGE_H
+#define _UDP_BRIDGE_H
+
+int udp_server();
+
+// Recv from anyone
+void udp_recv(int fd, uint8_t * buf, int size);
+
+// Send to 127.0.0.1:7112
+void udp_send(int fd, uint8_t * buf, int size);
+
+void udp_close(int fd);
+
+#endif