Created
April 7, 2017 12:28
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Wake-On-Lan Magic Packet using netcat in bash
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#!/usr/bin/env bash | |
mac_address=$1 | |
# Strip colons from the MAC address | |
mac_address=$(echo $mac_address | sed 's/://g') | |
broadcast=$2 | |
port=4343 | |
# Magic packets consist of 12*`f` followed by 16 repetitions of the MAC address | |
magic_packet=$( | |
printf 'f%.0s' {1..12} | |
printf "$mac_address%.0s" {1..16} | |
) | |
# ... and they need to be hex-escaped | |
magic_packet=$( | |
echo $magic_packet | sed -e 's/../\\x&/g' | |
) | |
# echo $magic_packet | |
echo -e $magic_packet | nc -w1 -u $broadcast $port |
what if my router can't accept any parameters in nc (-u)?
Hello.
I have a improvement for your script.
Change var: mac_address
From:
mac_address=$(echo $mac_address | sed 's/://g')
To:
mac_address=$(echo $mac_address | sed 's/[ :-]//g')
Then it will work with four mac formats.
Ex:
74:e6:e2:aa:aa:aa #Linux
74-e6-e2-aa-aa-aa #Windows
"74 e6 e2 aa aa aa" #Space
74e6e2aaaaaa #All close
oh yeah, sed
has slight different syntaxes depending on the OS. Maybe it'll be better to use perl
instead.
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thing I did: add
-b
and broadcast to255.255.255.255
to wake the device anywhere on the LAN