132 lines
No EOL
3.4 KiB
Bash
132 lines
No EOL
3.4 KiB
Bash
#!/usr/bin/env bash
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set -e;
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usage() {
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USAGE=$(cat <<EOF
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Usage: dynv6 [CONFIG_FILE (absolute path)]
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If no CONFIG_FILE is given, HOME/.dynv6.conf is used. This fallback option
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has to exist or the script will exit.
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Configuration can be done in any file and any pre-defined variable can be overwritten.
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The following are at least required for the script to work:
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- DYNV6_MAIL_ENABLED= // if notify via mail
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- DYNV6_MAIL_ADDRESS="" // (optional) mail.rc has to be configured
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- DYNV6_TOKEN="" // the dynv6 token
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- DYNV6_HOSTNAME="" // the dynv6 hostname
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- DYNV6_IPV4_ENABLED=true // if should update ipv4
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- DYNV6_IPV6_ENABLED=true // if should update ipv6
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You can copy this script to '/usr/local/bin' and use create a custom CONFIG_FILE as user. Examples can be found in '/usr/share/doc/<scriptname>'.
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EOF
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)
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echo "$USAGE";
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}
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# check for config file
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source_config() {
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local config=$1;
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local configFallback=$2;
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if [[ ! -f "$config" ]]; then
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if [[ ! -f "$configFallback" ]]; then
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echo "No config file specified and could not find default in '$configFallback'!";
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echo "";
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usage;
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exit 1;
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else
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config=$configFallback;
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fi
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fi
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set -a;
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source "$config";
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set +a;
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}
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apply_defaults() {
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if [ -z ${DYNV6_MAIL_ENABLED} ]; then
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DYNV6_MAIL_ENABLED=false;
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fi
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if [ -z ${DYNV6_MAIL_ADDRESS} ]; then
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DYNV6_MAIL_ADDRESS="";
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fi
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if [ -z ${DYNV6_TOKEN} ]; then
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DYNV6_TOKEN="";
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fi
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if [ -z ${DYNV6_HOSTNAME} ]; then
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DYNV6_HOSTNAME="";
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fi
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if [ -z ${DYNV6_IPV4_ENABLED} ]; then
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DYNV6_IPV4_ENABLED=true;
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fi
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if [ -z ${DYNV6_IPV6_ENABLED} ]; then
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DYNV6_IPV6_ENABLED=true;
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fi
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}
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check_required() {
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if [ -z ${DYNV6_TOKEN} ]; then
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echo "DYNV6_TOKEN is required"
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exit 1;
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fi
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if [ -z ${DYNV6_HOSTNAME} ]; then
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echo "DYNV6_HOSTNAME is required"
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exit 1;
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fi
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}
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# check requirements
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CONFIG_FILE="$1";
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FALLBACK_CONFIG_FILE="${HOME}/.dynv6.conf";
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source_config "${CONFIG_FILE}" "${FALLBACK_CONFIG_FILE}";
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apply_defaults;
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check_required;
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# DO NOT CHANGE
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token=${DYNV6_TOKEN}
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hostname=${DYNV6_HOSTNAME}
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echo "Checking ${hostname}"
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# check via service
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# ipv6
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if [ "${DYNV6_IPV6_ENABLED}" = "true" ]; then
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echo "Testing IPv6";
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ipv6Address=$(curl -s "https://v6.ident.me/")
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ipv6Res=$(curl -fsS "http://ipv6.dynv6.com/api/update?hostname=${hostname}&ipv6=${ipv6Address}&token=${token}")
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ipv6Changed=true;
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if [ "${ipv6Res}" = "addresses unchanged" ]; then
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ipv6Changed=false;
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fi
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if [ "${ipv6Changed}" = "true" ]; then
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echo "IPv6 changed"
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if [ "${DYNV6_MAIL_ENABLED}" = "true" ]; then
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HOSTMACHINE=$(hostname)
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echo -e "IPv6 for ${hostname} on host ${HOSTMACHINE} changed to ${ipv6Address}" | mailx -s "[dynv6 IPv6 ${HOSTMACHINE}] IPv6 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
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fi
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fi
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fi
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# ipv4
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if [ "${DYNV6_IPV4_ENABLED}" = "true" ]; then
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echo "Testing IPv4";
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ipv4Address=$(curl -s "https://v4.ident.me/")
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ipv4Res=$(curl -fsS "http://ipv4.dynv6.com/api/update?hostname=${hostname}&ipv4=${ipv4Address}&token=${token}")
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ipv4Changed=true;
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if [ "$ipv4Res" = "addresses unchanged" ]; then
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ipv4Changed=false;
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fi
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if [ "${ipv4Changed}" = "true" ]; then
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echo "IPv4 changed"
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if [ "${DYNV6_MAIL_ENABLED}" = "true" ]; then
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HOSTMACHINE=$(hostname)
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echo -e "IPv4 for ${hostname} on host ${HOSTMACHINE} changed changed to ${ipv4Address}" | mailx -s "[dynv6 IPv4 ${HOSTMACHINE}] IPv4 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
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fi
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fi
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fi |