6e35ed593f
(see: https://www.perfect-privacy.com/faq/ section How are the default forwarding ports being calculated?)
70 lines
2.0 KiB
Bash
70 lines
2.0 KiB
Bash
#! /bin/bash
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# Source our persisted env variables from container startup
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. /etc/transmission/environment-variables.sh
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# Settings
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TRANSMISSION_PASSWD_FILE=/config/transmission-credentials.txt
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transmission_username=$(head -1 $TRANSMISSION_PASSWD_FILE)
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transmission_passwd=$(tail -1 $TRANSMISSION_PASSWD_FILE)
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transmission_settings_file=${TRANSMISSION_HOME}/settings.json
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# Calculate the port
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IPADDRESS=$1
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echo "ipAddress to calculate port from $IPADDRESS"
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oct3=$(echo ${IPADDRESS} | tr "." " " | awk '{ print $3 }')
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oct4=$(echo ${IPADDRESS} | tr "." " " | awk '{ print $4 }')
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oct3binary=$(bc <<<"obase=2;$oct3" | awk '{ len = (8 - length % 8) % 8; printf "%.*s%s\n", len, "00000000", $0}')
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oct4binary=$(bc <<<"obase=2;$oct4" | awk '{ len = (8 - length % 8) % 8; printf "%.*s%s\n", len, "00000000", $0}')
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sum=${oct3binary}${oct4binary}
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portPartBinary=${sum:4}
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portPartDecimal=$((2#$portPartBinary))
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if [ ${#portPartDecimal} -ge 4 ]
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then
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new_port="1"${portPartDecimal}
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else
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new_port="10"${portPartDecimal}
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fi
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echo "calculated port $new_port"
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#
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# Now, set port in Transmission
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#
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# Check if transmission remote is set up with authentication
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auth_enabled=$(grep 'rpc-authentication-required\"' $transmission_settings_file | grep -oE 'true|false')
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if [ "true" = "$auth_enabled" ]
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then
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echo "transmission auth required"
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myauth="--auth $transmission_username:$transmission_passwd"
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else
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echo "transmission auth not required"
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myauth=""
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fi
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# get current listening port
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sleep 3
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transmission_peer_port=$(transmission-remote $myauth -si | grep Listenport | grep -oE '[0-9]+')
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if [ "$new_port" != "$transmission_peer_port" ]; then
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if [ "true" = "$ENABLE_UFW" ]; then
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echo "Update UFW rules before changing port in Transmission"
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echo "denying access to $transmission_peer_port"
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ufw deny ${transmission_peer_port}
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echo "allowing $new_port through the firewall"
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ufw allow ${new_port}
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fi
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transmission-remote ${myauth} -p "$new_port"
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echo "Checking port..."
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sleep 10
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transmission-remote ${myauth} -pt
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else
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echo "No action needed, port hasn't changed"
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fi
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