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nixos-config/home/bin/wg
Alexander Szczepanski 315784fc98 vps-2024-05-31-13-02-21
2024-05-31 13:02:29 +02:00

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#!/usr/bin/env zsh
PEERFILE=/home/alex/.wgpeers
WGCOMMAND="wg"
# Make sure peer file exists
if [[ ! -f "$PEERFILE" ]]; then
touch "$PEERFILE" 2>/dev/null
if [[ "$?" != "0" ]]; then
echo "Peer file $PEERFILE is not accesible by your user"
exit 0
fi
fi
function updatePeerFile() {
local NEWPEERS=()
# Loop config, extract peers, check peers file, add if not present
while read LINE ; do
# Check if its a peer line
if [[ $LINE == *"peer"* ]]; then
# Isolate peer public key, cut peer: (hardcoded)
PEERPK=$(printf '%s' "$LINE" | cut -c7-)
# See if we can find peer in peers file
PEERCOUNT=$(grep $PEERPK "$PEERFILE" | wc -l)
if [[ $PEERCOUNT -eq 0 ]]; then
# Peer not found in peers file, add for later processing
NEWPEERS+=("$PEERPK")
fi
fi
done <<< $("$WGCOMMAND")
for PEERPK in "${NEWPEERS[@]}"; do
echo -n "Enter friendly name for peer "
tput setaf 7; tput bold
echo -n $PEERPK
tput setaf 9; tput sgr0
read -r -p " : " PEERNAME
if [[ "$PEERNAME" == "" ]]; then
PEERNAME="Unnamed peer"
fi
echo "$PEERPK:$PEERNAME" >> "$PEERFILE"
done
}
function showConfiguration() {
# Determine if we are using rich (colorful) output or not
local RICHOUTPUT=1;
if [[ ! -t 1 ]]; then
RICHOUTPUT=0
fi
# Run wg through script to preserve color coding
script --flush --quiet /dev/null --command "$WGCOMMAND" | while read LINE ; do
# Check if its a peer line
if [[ $LINE == *"peer"* ]]; then
# Isolate peer public key, cut peer: (incl colors) hardcoded, then cut until first ESC character
PEERPK=$(printf '%s' "$LINE" | cut -c25- | cut -d $(echo -e '\033') -f1)
# Output peer line
echoLine "$LINE" $RICHOUTPUT 1
# See if we can find peer in peers file
PEER=$(grep $PEERPK "$PEERFILE" | cut -d ':' -f2)
# If we found a friendly name, print that
if [[ "$PEER" != "" ]]; then
# Pretty print friendly name
echoLine "$(printf '%s' "$(tput bold)$(tput setaf 7) friendly name$(tput setaf 9)$(tput sgr0)")" $RICHOUTPUT 0
echoLine "$(printf '%s' ": $PEER")" $RICHOUTPUT 1
fi
else
# Non-peer line, just output, but remember indentation
if [[ "$LINE" == *"interface"* ]]; then
echoLine "$LINE" $RICHOUTPUT 1
else
echoLine " $LINE" $RICHOUTPUT 1
fi
fi
done
}
# $1: text, $2 richoutput, $3 print linebreak
function echoLine() {
# Strip any newline characters
local OUTPUTLINE=$(printf '%s' "$1" | sed '$ s/\[\r\n]$//')
# If not rich output, strip ANSI control codes
if [[ $2 -eq 0 ]]; then
OUTPUTLINE=$(printf '%s' "$OUTPUTLINE" | sed 's/\x1b\[[0-9]\{0,\}m\{0,1\}\x0f\{0,1\}//g')
fi
# Handle newline printing
if [[ $3 -eq 0 ]]; then
printf '%s' "$OUTPUTLINE"
else
printf '%s\r\n' "$OUTPUTLINE"
fi
}
# What are we doing?
if [[ $# -gt 0 ]]; then
while getopts :u OPTION; do
case ${OPTION} in
u) updatePeerFile
exit
;;
esac
done
echo Usage: wgg.sh [-u]
echo -e " -u\tAdd missing peers to $PEERFILE"
echo ""
echo If no arguments are given, shows wg configuration with friendly peernames added
else
# Show the peer-enriched configuration overview
showConfiguration
fi