rework
This commit is contained in:
-93
@@ -1,93 +0,0 @@
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#! /bin/bash
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# Work with DigitalOcean api to update "A" record for a domain.
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# Store DigitalOcean API token in file : DIGITALOCEAN_TOKEN
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# Store domain to be updated in file : DIGITALOCEAN_DOMAIN
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SCRIPT="${BASH_SOURCE[0]}"
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SCRIPT_DIR=$(builtin cd "${SCRIPT%/*}" && pwd )
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SCRIPT_NAME=${SCRIPT##*/}
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REPEAT_CHECK_DIR=$SCRIPT_DIR
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REPEAT_CHECK=$REPEAT_CHECK_DIR/REPEAT_CHECK # file to save argument in if successful
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DIGITALOCEAN_DOMAIN=`cat $SCRIPT_DIR/DIGITALOCEAN_DOMAIN`
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DIGITALOCEAN_TOKEN=`cat $SCRIPT_DIR/DIGITALOCEAN_TOKEN`
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# Get IP from command line if available. Otherwise use curl to get public IP.
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IP=""
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if [ "$#" == "1" ]; then
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IP=$1
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else
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IP=`curl -4 icanhazip.com 2> /dev/null`
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fi
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# If $IP does not look like a valid address then complain and exit.
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# For regular expression, thank you to : https://tecadmin.net/shell-script-validate-ipv4-addresses/
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if ! [[ $IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
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echo Invalid IP address format: $IP
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exit
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fi
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get_a_record_ids() {
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curl -X GET \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_records | map(select(.type == "A" and .name == "@")) | map(.id) | .[]'
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}
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add_a_record() {
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curl -X POST \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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-d "{\"type\":\"A\" \
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,\"name\":\"@\" \
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,\"data\":\"$IP\" \
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,\"priority\":null \
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,\"port\":null \
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,\"ttl\":1800 \
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,\"weight\":null \
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,\"flags\":null \
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,\"tag\":null \
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}" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_record.id'
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}
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delete_record_by_id() {
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echo deleting existing A record for $DIGITALOCEAN_DOMAIN
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curl -X DELETE \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records/$1" > /dev/null 2>&1
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}
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replace_a_record() {
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for id in `get_a_record_ids`; do
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delete_record_by_id $id
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done
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new_record_id=`add_a_record`
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if [ "$new_record_id" == "null" ] ; then
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echo unable to add new A record for $DIGITALOCEAN_DOMAIN with value : $1
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return 1
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fi
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echo added new A record for $DIGITALOCEAN_DOMAIN with value : $1
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}
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# exit if previous successful call was with same argument
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if [[ -e $REPEAT_CHECK ]]; then
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PREVIOUS_IP=`cat $REPEAT_CHECK`
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if [[ "$IP" == "$PREVIOUS_IP" ]]; then
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echo previous update was also with argument: \"$IP\" so exiting now to avoid duplicate work.
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exit
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fi
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fi
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# attempt to replace A record and, if successful, save arguments to check against next time
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if replace_a_record $IP; then
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# if successful then save arguments.
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echo update worked so saving arguments \"$IP\" in $REPEAT_CHECK
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mkdir -p $REPEAT_CHECK_DIR
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echo "$IP" > $REPEAT_CHECK
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fi
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@@ -0,0 +1,134 @@
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#! /bin/sh
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# Work with DigitalOcean api to update "A" and "AAAA" records for a domain.
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# Store DigitalOcean API token in file : DIGITALOCEAN_TOKEN
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# Store domain to be updated in file : DIGITALOCEAN_DOMAIN
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ip_version="$1"
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if [ -z "${ip_version:-}" ] || ([ "$ip_version" != 4 ] && [ "$ip_version" != 6 ]); then
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echo "Error: no valid IP version provided" &>2
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echo "Usage: dyndns.bash <4|6>" &>2
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exit 1
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fi
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IP="$(./get_ip_addr.sh $ip_version)"
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if [ -z "$IP" ]; then
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echo "Error: could not find IP address" &>2
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exit 1
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fi
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SCRIPT="$0"
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SCRIPT_DIR=$(cd "${SCRIPT%/*}" && pwd )
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SCRIPT_NAME=${SCRIPT##*/}
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REPEAT_CHECK_DIR=$SCRIPT_DIR
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REPEAT_CHECK_A=$REPEAT_CHECK_DIR/REPEAT_CHECK_A
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REPEAT_CHECK_AAAA=$REPEAT_CHECK_DIR/REPEAT_CHECK_AAAA
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REPEAT_CHECK="$([ $ip_version = 4 ] && echo $REPEAT_CHECK_A || echo $REPEAT_CHECK_AAAA)"
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DIGITALOCEAN_DOMAIN=`cat $SCRIPT_DIR/DIGITALOCEAN_DOMAIN`
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DIGITALOCEAN_TOKEN=`cat $SCRIPT_DIR/DIGITALOCEAN_TOKEN`
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get_a_record_ids() {
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curl -X GET \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_records | map(select(.type == "A" and .name == "@")) | map(.id) | .[]'
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}
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get_aaaa_record_ids() {
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curl -X GET \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_records | map(select(.type == "AAAA" and .name == "@")) | map(.id) | .[]'
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}
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add_a_record() {
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curl -X POST \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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-d "{\"type\":\"A\" \
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,\"name\":\"@\" \
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,\"data\":\"$IP\" \
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,\"priority\":null \
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,\"port\":null \
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,\"ttl\":1800 \
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,\"weight\":null \
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,\"flags\":null \
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,\"tag\":null \
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}" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_record.id'
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}
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add_aaaa_record() {
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curl -X POST \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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-d "{\"type\":\"AAAA\" \
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,\"name\":\"@\" \
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,\"data\":\"$IP\" \
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,\"priority\":null \
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,\"port\":null \
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,\"ttl\":1800 \
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,\"weight\":null \
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,\"flags\":null \
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,\"tag\":null \
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}" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records" 2> /dev/null | jq '.domain_record.id'
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}
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delete_record_by_id() {
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echo deleting existing A/AAAA record for $DIGITALOCEAN_DOMAIN
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curl -X DELETE \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
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"https://api.digitalocean.com/v2/domains/$DIGITALOCEAN_DOMAIN/records/$1" > /dev/null 2>&1
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}
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replace_a_records() {
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for id in `get_a_record_ids`; do
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delete_record_by_id $id
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done
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new_record_id=`add_a_record`
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if [ "$new_record_id" = "null" ] ; then
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echo unable to add new A record for $DIGITALOCEAN_DOMAIN with value: $IP
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return 1
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fi
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echo added new A record for $DIGITALOCEAN_DOMAIN with value: $IP
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}
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replace_aaaa_records() {
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for id in `get_aaaa_record_ids`; do
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delete_record_by_id $id
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done
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new_record_id=`add_aaaa_record`
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if [ "$new_record_id" = "null" ] ; then
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echo unable to add new AAAA record for $DIGITALOCEAN_DOMAIN with value: $IP
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return 1
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fi
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echo added new AAAA record for $DIGITALOCEAN_DOMAIN with value: $IP
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}
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replace_records() {
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[ $ip_version = 4 ] && replace_a_records || replace_aaaa_records
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}
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# exit if previous successful call was with same argument
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if [ -e $REPEAT_CHECK ]; then
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PREVIOUS_IP=`cat $REPEAT_CHECK`
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if [ "$IP" = "$PREVIOUS_IP" ]; then
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echo previous update was also with argument: \"$IP\" so exiting now to avoid duplicate work.
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exit
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fi
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fi
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# attempt to replace records and, if successful, save arguments to check against next time
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if replace_records $IP; then
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# if successful then save arguments.
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echo update worked so saving arguments \"$IP\" in $REPEAT_CHECK
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mkdir -p $REPEAT_CHECK_DIR
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echo "$IP" > $REPEAT_CHECK
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fi
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Executable
+51
@@ -0,0 +1,51 @@
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#!/bin/sh
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ip_version="$1"
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if [ -z "${ip_version:-}" ] || ([ "$ip_version" != 4 ] && [ "$ip_version" != 6 ]); then
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echo "Usage: get_ip_addr <4|6>" &>2
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exit 1
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fi
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if [ $ip_version = 4 ]; then
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curl -4 http://icanhazip.com 2> /dev/null
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exit 0
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fi
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set -eu
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CONN_NAME=${CONN_NAME:-nevis}
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conn_device_name="$(nmcli --fields NAME,DEVICE con show | grep ^$CONN_NAME | sed 's/\s\+/ /g' | cut -d' ' -f 2)"
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if [ -z "${conn_device_name:-}" ]; then
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echo "Could not find the connection device name for connection: \"$CONN_NAME\"" &>2
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exit 1
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fi
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device_line_no="$(ip addr | grep -En ^[0-9]+:\ $conn_device_name | cut -d':' -f 1)"
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if [ -z "${device_line_no:-}" ]; then
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echo "Could not find device: \"$conn_device_name\" in output of ip addr" &>2
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exit 1
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fi
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ip_addr_output_for_device="$(ip addr | tail -n +$(($device_line_no + 1)))"
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device_no="$(ip addr | tail -n +$device_line_no | head -n 1 | cut -d':' -f 1)"
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next_device_no=$(($device_no + 1))
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next_device_line_no="$(ip addr | grep -En ^${next_device_no}:\ | cut -d':' -f 1)"
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if [ -n "${next_device_line_no:-}" ]; then
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len=$(($next_device_line_no - ($device_line_no + 1)))
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ip_addr_output_for_device="$(echo $ip_addr_output_for_device | head -n $len)"
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fi
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ipv4_regex="([a-z0-9]{1,3}\.){3}[a-z0-9]{1,3}"
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ipv6_regex="([a-z0-9]{1,4}:){7}[a-z0-9]{1,4}"
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if [ "$ip_version" = "4" ]; then
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ip_regex="$ipv4_regex"
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else
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ip_regex="$ipv6_regex"
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fi
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ip="$(echo "$ip_addr_output_for_device" | grep "scope global" | grep -oE $ip_regex | head -n 1)"
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if [ -z "${ip:-}" ]; then
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echo "Could not find global IP in output of ip addr under device: $conn_device_name ($CONN_NAME)"
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exit 1
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fi
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echo "$ip"
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