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README: information about the ethercat utility
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PTHOEM LINUX UTILS (c) 2007-2017 Peter Thoemmes
Weinbergstrasse 3a, D-54441 Ockfen/Germany

ethercat is made to directly 'cat' into the link layer of a network,
like 'netcat' does for transport layer.

You can use the tool in a pipeline (it will read stdin)...

    $ cat <file> | ethercat -i eth0 -dst 80:43:21:2F:3A:65 ...

or just standalone by passing the input filename 'file' as a parameter...

    $ ethercat -i eth0 -dst 80:43:21:2F:3A:65 <file>

It is possible to cat a HEX string as well (example for adapter 'wlan0')...

    $ echo "FFFF" | ethercat -hex_str_input -i wlan0 -dst 80:43:21:2F:3A:65

Using the WOL (Wake On LAN) script 'wol.sh' allows to wake up
computers by the magic WOL packet using UDPv4 to port 9...

    $ wol.sh wlan0 80:43:21:2F:3A:65

To learn more about the usage of ethercat...

    $ ethercat -?

I wish you a lot of success using my work,
Peter
Source: README, updated 2017-06-22