82 lines
2.4 KiB
Bash
Executable File
82 lines
2.4 KiB
Bash
Executable File
#! /bin/sh
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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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PIA_PASSWD_FILE=/config/openvpn-credentials.txt
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TRANSMISSION_PASSWD_FILE=/config/transmission-credentials.txt
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pia_username=$(head -1 $PIA_PASSWD_FILE)
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pia_passwd=$(tail -1 $PIA_PASSWD_FILE)
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transmission_username=$(head -1 $TRANSMISSION_PASSWD_FILE)
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transmission_passwd=$(tail -1 $TRANSMISSION_PASSWD_FILE)
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local_vpn_ip=$1 # Passed as parameter from periodicUpdates.sh
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pia_client_id_file=/etc/transmission/pia_client_id
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transmission_settings_file=${TRANSMISSION_HOME}/settings.json
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port_assignment_url=https://www.privateinternetaccess.com/vpninfo/port_forward_assignment
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#
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# First get a port from PIA
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#
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new_client_id() {
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head -n 100 /dev/urandom | md5sum | tr -d " -" | tee $pia_client_id_file
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}
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pia_client_id="$(cat $pia_client_id_file 2>/dev/null)"
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if [ -z ${pia_client_id} ]; then
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echo "Generating new client id for PIA"
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pia_client_id=$(new_client_id)
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fi
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# Get the port
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pia_response=$(curl -s -f -d "user=$pia_username&pass=$pia_passwd&client_id=$pia_client_id&local_ip=$local_vpn_ip" $port_assignment_url)
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# Check for curl error (curl will fail on HTTP errors with -f flag)
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ret=$?
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if [ $ret -ne 0 ]; then
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echo "curl encountered an error looking up new port: $ret"
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fi
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# Check for errors in PIA response
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error=$(echo $pia_response | grep -oE "\"error\".*\"")
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if [ ! -z "$error" ]; then
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echo "PIA returned an error: $error"
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exit
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fi
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# Get new port, check if empty
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new_port=$(echo $pia_response | grep -oE "[0-9]+")
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if [ -z "$new_port" ]; then
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echo "Could not find new port from PIA"
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exit
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fi
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echo "Got new port $new_port from PIA"
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#
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# Now, set port in Transmission
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#
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# Check if transmission remote is set up with authentication
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auth_enabled=$(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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transmission_peer_port=$(transmission-remote $myauth -si | grep Listenport | grep -oE '[0-9]+')
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if [ "$new_port" != "$transmission_peer_port" ]
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then
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transmission-remote $myauth -p "$new_port"
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echo "Checking port..."
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sleep 10 && 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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