62 lines
2.0 KiB
Bash
62 lines
2.0 KiB
Bash
#!/bin/bash
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################################################################################
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# CONFIGURATION
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################################################################################
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# check every TIMEOUT seconds (default 300 = 5 min)
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TIMEOUT=300
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# user credentials
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USERNAME="ur goip username"
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PASSWORD="ur goip password"
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DOMAIN="urdomain.goip.it"
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# Discord webhook
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DISCORD_WEBHOOK_URL="" # leave empty to disable
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DISCORD_WEBHOOK_MESSAGE_UPDATE="DNS entry for $DOMAIN has been updated successfully. ($(date))"
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DISCORD_WEBHOOK_MESSAGE_FAIL="DNS entry update for $DOMAIN failed. ($(date))"
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################################################################################
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# END OF CONFIGURATION
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################################################################################
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function discord_update_message {
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if [ -n $DISCORD_WEBHOOK_URL ]; then
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local MESSAGE='{"username": "DNS Record Updater", "content": "'"$1"'"}'
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wget -qO - --post-data="$MESSAGE" --header='Content-Type:application/json' "$DISCORD_WEBHOOK_URL"
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fi
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}
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function get_ip {
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# get a string in format 'ip=x.x.x.x' by splitting out a json over multiple lines and removing characters
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local IP=$(wget -4qO - "https://api.myip.com" | sed 's/[\{\}]//g;s/,/\n/g' | sed -n 's/"//g;s/:/=/g;/ip/p')
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if [ -z $IP ]; then
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echo "Getting my own IP failed." >&2
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echo "ip=0.0.0.0"
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else
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echo $IP
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fi
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}
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function set_ip {
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wget -qO - "https://goip.it/setip?username=$USERNAME&password=$PASSWORD&subdomain=$DOMAIN&$1"
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local EXIT_CODE="$?"
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echo "" # add newline after wget output
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if [ $EXIT_CODE -ne 0 ]; then
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echo "Setting a new IP using wget failed with exit code $EXIT_CODE." >&2
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discord_update_message "$DISCORD_WEBHOOK_MESSAGE_FAIL"
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else
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discord_update_message "$DISCORD_WEBHOOK_MESSAGE_UPDATE"
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fi
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}
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IP="ip=0.0.0.0"
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while true; do
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NEW_IP=$(get_ip)
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if [ $IP != $NEW_IP ]; then
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echo -e "IP has changed. New IP:\n$NEW_IP"
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IP="$NEW_IP"
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set_ip "$IP"
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fi
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sleep $TIMEOUT
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done
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