I connect my computer to a wired (Ethernet) network. I have "mac address". I want to connect to this network with "mac address" and send and receive data. I used "QTcpSocket" class and "connectToHost" function. But I haven't port number. Please guide me.

@ neda said in Qt Ethernet communication : I do not want to go into the issues related to IP. That's why I want to use "MAC address". See http://3.bp.blogspot.com/-BU-xe38B1qc/Ufavge5wj7I/AAAAAAAAAzg/jNuL7k2bY_0/s1600/OSI-TCP-Model-v1.png . These are the 7 layers of the Open System Interconnection model: Physical Data Link (Ethernet, MAC addresses) Network (Internet Protocol, IP addresses) Transport (TCP) Session Presentation Application You said you want to use only Ethernet and MAC addresses (Layer 2). If you don't want to use IP address (Layer 3), that means you cannot use TCP (Layer 4). TCP requires IP to work. That also means you must implement your own Network layer to replace IP. If your devices run Linux, you must write kernel drivers. This is a lot of work; do you want to continue? @ neda said in Qt Ethernet communication : @ JKSH said in Qt Ethernet communication : You must find the IP address. No problem. I can find it. foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces()) This code only finds the network adaptors (and IP addresses) on the device that runs this code. It does not find other devices for you to send/receive data.

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Qt Ethernet communication

Unsolved General and Desktop

21 Posts 9 Posters 10.8k Views 2 Watching

H Hedayat

@Hugh-P
Finally, I could find a good reply! :)) I want to send a layer 2 Frame (not a layer3 packet or upper layers of OSI message) from an android device to my electronic board. Do you have any suggestion?

Thanks a lot!
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ChrisW67

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#21

Read the "good reply" by Hugh-P, or adapt from the earlier reply by kuzulis
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