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Capturing traffic between smartphone and Wi-Fi camera


That is perhaps a generic question but I would appreciate an answer.

I have a device, wi-fi camera that acts as Access Point. The control over the device is maintained over android app. I discovered that this app is communicating with the device with simple http requests. I did that by emulating android on my computer and then capturing packets with wireshark. What I would like to do however is to avoid emulating android since it causes problems. So this is how I would like this to work

My smartphone connects to the computer via wifi and then all of its connections are transferred to the wifi camera (something dmz like). Meanwhile I caputre all the traffic between smartphone and camera.

I have 2 external wifi cards, one could work as AP for smartphone and the other as client to the camera's AP. But how should I set this up?