Is it possible to receive all bytes which are flowing in WiFi? Can I receive it as a byte or text using (if I know the WiFi passowrd)? The programing language isn't importatant for me. I think that everybody can read the informations which are flowing using the WiFi because they're the electromagnic waves?
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Yes, it is possible. That's how WiFi works. – Sami Kuhmonen Jun 20 '15 at 20:43
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Study `Sockets` and `Socket Programming`! – Transcendent Jun 20 '15 at 20:44
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But how can I do it? Is it necessary to write a own driver to the WiFi adapter? – Pawelsar1 Jun 20 '15 at 20:47
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google network sniffer – Cheers and hth. - Alf Jun 20 '15 at 20:48
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A Web Connection uses TCP as the Transport Layer so you can connect using TCP. – jdweng Jun 20 '15 at 20:49
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@Pawelsar1: If you wanna eavesdrop on the packets, then no, you can listen to the network adapter using sockets. If you wanna communicate with the WiFi from your code, again no need to write a driver, you communicate to the adapter using sockets again. What are you exactly trying to achieve? – Transcendent Jun 20 '15 at 20:49
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@jdweng: It can also use UDP, for example when it comes to Streaming. – Transcendent Jun 20 '15 at 20:53
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You can use Wireshark (www.wireshark.org) to decode packets that are flowing in or out of the machine the programme is running on.
To snoop on packets that are passing between other machines you'll need something that can capture raw packets, such as Shark for Root for Android (https://play.google.com/store/apps/details?id=lv.n3o.shark&hl=en)
Of course, if the traffic is encrypted (connected to an HTTPS address or through a VPN for example) then it's a lot more difficult to decode (though the NSA doesn't have much trouble). You'll need to become a "man in the middle" or get hold of the encryption keys somehow.
Phil McKerracher
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I know that I can use programs, but I want to know how do they work? – Pawelsar1 Jun 20 '15 at 20:59
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@Pawelsar1: All of them use Sockets as I said, you create a socket and using appropriate arguments you can sniff the traffic. If you use C#, then `System.Net.Socket`. Or take a look at https://msdn.microsoft.com/en-us/library/system.net.sockets.socket(v=vs.110).aspx – Transcendent Jun 20 '15 at 21:03
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Thank. But is sniffing the data possible without dynamically changing the MAC and/or local IP? – Pawelsar1 Jun 20 '15 at 21:28