148 lines
4.1 KiB
Bash
148 lines
4.1 KiB
Bash
#!/usr/bin/env bash
|
|
|
|
set -e;
|
|
|
|
usage() {
|
|
USAGE=$(cat <<EOF
|
|
Usage: dynv6 [CONFIG_FILE (absolute path)]
|
|
|
|
If no CONFIG_FILE is given, HOME/.dynv6.conf is used. This fallback option
|
|
has to exist or the script will exit.
|
|
|
|
Configuration can be done in any file and any pre-defined variable can be overwritten.
|
|
|
|
The following are at least required for the script to work:
|
|
- DYNV6_MAIL_ENABLED= // if notify via mail
|
|
- DYNV6_MAIL_ADDRESS="" // (optional) mail.rc has to be configured
|
|
- DYNV6_TOKEN="" // the dynv6 token
|
|
- DYNV6_HOSTNAME="" // the dynv6 hostname
|
|
- DYNV6_IPV4_ENABLED=true // if should update ipv4
|
|
- DYNV6_IPV6_ENABLED=true // if should update ipv6
|
|
- DYNV6_IPV6_INTERFACE=eth0 // which interface to track, be sure that Privacy Extensions are disabled
|
|
|
|
You can copy this script to '/usr/local/bin' and use create a custom CONFIG_FILE as user. Examples can be found in '/usr/share/doc/<scriptname>'.
|
|
EOF
|
|
)
|
|
echo "$USAGE";
|
|
}
|
|
|
|
# check for config file
|
|
source_config() {
|
|
local config=$1;
|
|
local configFallback=$2;
|
|
|
|
if [[ ! -f "$config" ]]; then
|
|
if [[ ! -f "$configFallback" ]]; then
|
|
echo "No config file specified and could not find default in '$configFallback'!";
|
|
echo "";
|
|
usage;
|
|
exit 1;
|
|
else
|
|
config=$configFallback;
|
|
fi
|
|
fi
|
|
|
|
set -a;
|
|
source "$config";
|
|
set +a;
|
|
}
|
|
|
|
apply_defaults() {
|
|
if [ -z ${DYNV6_MAIL_ENABLED} ]; then
|
|
DYNV6_MAIL_ENABLED=false;
|
|
fi
|
|
if [ -z ${DYNV6_MAIL_ADDRESS} ]; then
|
|
DYNV6_MAIL_ADDRESS="";
|
|
fi
|
|
if [ -z ${DYNV6_TOKEN} ]; then
|
|
DYNV6_TOKEN="";
|
|
fi
|
|
if [ -z ${DYNV6_HOSTNAME} ]; then
|
|
DYNV6_HOSTNAME="";
|
|
fi
|
|
if [ -z ${DYNV6_IPV4_ENABLED} ]; then
|
|
DYNV6_IPV4_ENABLED=true;
|
|
fi
|
|
if [ -z ${DYNV6_IPV6_ENABLED} ]; then
|
|
DYNV6_IPV6_ENABLED=true;
|
|
fi
|
|
if [ -z ${DYNV6_IPV6_INTERFACE} ]; then
|
|
DYNV6_IPV6_INTERFACE="eth0";
|
|
fi
|
|
}
|
|
|
|
check_required() {
|
|
if [ -z ${DYNV6_TOKEN} ]; then
|
|
echo "DYNV6_TOKEN is required"
|
|
exit 1;
|
|
fi
|
|
if [ -z ${DYNV6_HOSTNAME} ]; then
|
|
echo "DYNV6_HOSTNAME is required"
|
|
exit 1;
|
|
fi
|
|
}
|
|
|
|
# check requirements
|
|
CONFIG_FILE="$1";
|
|
FALLBACK_CONFIG_FILE="${HOME}/.dynv6.conf";
|
|
source_config "${CONFIG_FILE}" "${FALLBACK_CONFIG_FILE}";
|
|
apply_defaults;
|
|
check_required;
|
|
|
|
# DO NOT CHANGE
|
|
token=${DYNV6_TOKEN}
|
|
hostname=${DYNV6_HOSTNAME}
|
|
|
|
echo "Checking ${hostname}"
|
|
|
|
# check via service
|
|
# ipv6
|
|
if [ "${DYNV6_IPV6_ENABLED}" = "true" ]; then
|
|
echo "Testing IPv6";
|
|
ipv6Address=$(LC_ALL=C /usr/bin/ip -c=never -6 -o a s dev ${DYNV6_IPV6_INTERFACE} | grep --color=never -Po '(?<=inet6 )(2.*?)(?=\/64 scope global dynamic mngtmpaddr)')
|
|
|
|
ipv6AddressLocalFile="/tmp/dynv6_ip6";
|
|
|
|
if [ ! -f "${ipv6AddressLocalFile}" ]; then
|
|
touch "${ipv6AddressLocalFile}";
|
|
fi
|
|
|
|
if grep --color=never -Fxq ${ipv6Address} "${ipv6AddressLocalFile}"; then
|
|
echo "IPv6 is still ${ipv6Address}";
|
|
else
|
|
echo "IPv6 changed"
|
|
echo "${ipv6Address}" > "${ipv6AddressLocalFile}";
|
|
|
|
ipv6Res=$(curl -s -v "https://ipv6.dynv6.com/api/update?hostname=${hostname}&ipv6=${ipv6Address}&token=${token}")
|
|
ipv6Changed=true;
|
|
|
|
if [ "${ipv6Res}" = "addresses unchanged" ]; then
|
|
ipv6Changed=false;
|
|
fi
|
|
if [ "${ipv6Changed}" = "true" ]; then
|
|
if [ "${DYNV6_MAIL_ENABLED}" = "true" ]; then
|
|
HOSTMACHINE=$(hostname)
|
|
echo -e "IPv6 for ${hostname} on host ${HOSTMACHINE} changed to ${ipv6Address}" | mailx -s "[dynv6 IPv6 ${HOSTMACHINE}] IPv6 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
|
|
fi
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# ipv4
|
|
if [ "${DYNV6_IPV4_ENABLED}" = "true" ]; then
|
|
echo "Testing IPv4";
|
|
ipv4Address=$(curl -s "https://v4.ident.me/")
|
|
ipv4Res=$(curl -fsS "https://ipv4.dynv6.com/api/update?hostname=${hostname}&ipv4=${ipv4Address}&token=${token}")
|
|
ipv4Changed=true;
|
|
if [ "$ipv4Res" = "addresses unchanged" ]; then
|
|
ipv4Changed=false;
|
|
fi
|
|
if [ "${ipv4Changed}" = "true" ]; then
|
|
echo "IPv4 changed"
|
|
|
|
if [ "${DYNV6_MAIL_ENABLED}" = "true" ]; then
|
|
HOSTMACHINE=$(hostname)
|
|
echo -e "IPv4 for ${hostname} on host ${HOSTMACHINE} changed to ${ipv4Address}" | mailx -s "[dynv6 IPv4 ${HOSTMACHINE}] IPv4 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
|
|
fi
|
|
fi
|
|
fi
|