feat: ipv6 support added

dyndns.sh

@@ -1,13 +1,14 @@
 #!/bin/bash
+set -euo pipefail
 
 api_host="https://api.digitalocean.com/v2"
 sleep_interval=${SLEEP_INTERVAL:-300}
 remove_duplicates=${REMOVE_DUPLICATES:-"false"}
 
+# Only services with ipv6 supported are listed here.
 services=(
     "ifconfig.co"
-    "ipinfo.io/ip"
-    "ifconfig.me"
+    "ifconfig.io"
 )
 
 die() {
@@ -22,28 +23,16 @@ test -z $NAME && die "NAME not set!"
 
 dns_list="$api_host/domains/$DOMAIN/records"
 
-while ( true ); do
-    domain_records=$(curl -s -X GET \
-        -H "Content-Type: application/json" \
-        -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
-        $dns_list"?per_page=200")
-
-    for service in ${services[@]}; do
-        echo "Trying with $service..."
-
-        ip="$(curl -s $service | grep '[0-9]\{1,3\}\(\.[0-9]\{1,3\}\)\{3\}')"
-        test -n "$ip" && break
-    done
-
-    echo "Found IP address $ip"
-
-    if [[ -n $ip ]]; then
+configure_record() {
   # disable glob expansion
   set -f
 
+  ip=$1
+  type=$2
+
   for sub in ${NAME//;/ }; do
-            record_id=$(echo $domain_records| jq ".domain_records[] | select(.type == \"A\" and .name == \"$sub\") | .id")
-            record_data=$(echo $domain_records| jq -r ".domain_records[] | select(.type == \"A\" and .name == \"$sub\") | .data")
+    record_id=$(echo $domain_records| jq ".domain_records[] | select(.type == \"$type\" and .name == \"$sub\") | .id")
+    record_data=$(echo $domain_records| jq -r ".domain_records[] | select(.type == \"$type\" and .name == \"$sub\") | .data")
 
     if [ $(echo "$record_id" | wc -l) -ge 2 ]; then :
       if [[ "${remove_duplicates}" == "true" ]]; then :
@@ -94,8 +83,36 @@ while ( true ); do
       echo "existing DNS record address ($record_data) did not need updating"
     fi
   done
+}
+
+while ( true ); do
+    domain_records=$(curl -s -X GET \
+        -H "Content-Type: application/json" \
+        -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
+        $dns_list"?per_page=200")
+
+    for service in ${services[@]}; do
+        echo "Trying with $service..."
+
+        ipv4="$(curl -4 -s -f $service)"
+        ipv6="$(curl -6 -s -f $service)"
+
+        test -n "$ipv4$ipv6" && break
+    done
+
+    echo "Found IPv4 address $ipv4"
+    echo "Found IPv6 address $ipv6"
+
+    if [[ -z $ipv4 ]]; then
+        echo "IPv4 wasn't retrieved within allowed interval. Will try $sleep_interval seconds later.."
     else
-        echo "IP wasn't retrieved within allowed interval. Will try $sleep_interval seconds later.."
+      configure_record $ipv4 "A"
+    fi
+
+    if [[ -z $ipv6 ]]; then
+        echo "IPv6 wasn't retrieved within allowed interval. Will try $sleep_interval seconds later.."
+    else
+      configure_record $ipv6 "AAAA"
     fi 
 
     sleep $sleep_interval