Send hexdumps copied from Tcpdump/Wireshark. Save the hexdump in a file and give it to hexend to send it on an interface. Useful for repeating a specific captured frame, instead of making a PCAP playback or trying to recreate it using tools like Nemesis or EasyFrames. It’s also possible to write the frame by hand if you so wish.

GitHub repository

Using Hexend

The input may only contain hexadecimal characters and whitespace.

Send a frame from file to eth0. Repeats until stopped.

hexend eth0 my_frames/frame.hex

Send a frame from file, repeat 10 times and suppress output

hexend eth0 my_frames/frame.hex -c 10 -q

Pipe file contents to input, repeat 5 times with 0.1 second interval

cat my_frames/frame.hex | hexend eth0 -c 5 -i 0.1

Pipe raw string to input, repeat 1000 times with no interval

echo ffffffffffffaaaaaaaaaaaa0000 | hexend eth0 -c 1000 -i 0


If you just want a simple alternative to this you can use a script like

cat $2 | xxd -r -p | socat -u STDIN interface:$1

that will behave like Hexend regarding the input, but doesn’t support any flags. Looping this is also inefficient for sending at low intervals.