跨职能流程图（垂直）

Y

Build a DNS response

N

Start

Start wireshark and Select WLAN 

Forward DNS query to Server

Receive DNS query

Flag = 0x8583

Initialize ID Conversion Table

Capture filter udp port 53

Check relay file

IP = 0.0.0.0

IP address is found

Flag = 0x8580

Get Response and send back