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#! /bin/sh
# Example script!
# This script looks up radsec srv records in DNS for the one
# realm given as argument, and creates a server template based
# on that. It currently ignores weight markers, but does sort
# servers on priority marker, lowest number first.
# For host command this is column 5, for dig it is column 1.
usage() {
/bin/echo "Usage: ${0} <realm>"
exit 1
}
test -n "${1}" || usage
REALM="${1}"
DIGCMD=$(command -v dig)
HOSTCMD=$(command -v host)
dig_it_srv() {
${DIGCMD} +short srv $SRV_HOST | sort -k1 |
while read line; do
set $line ; PORT=$3 ; HOST=$4
/bin/echo -e "\thost ${HOST%.}:${PORT}"
done
}
dig_it_naptr() {
${DIGCMD} +short naptr ${REALM} | grep x-eduroam:radius.tls | sort -k1 |
while read line; do
set $line ; TYPE=$3 ; HOST=$6
if [ "$TYPE" = "\"s\"" ]; then
SRV_HOST=${HOST%.}
dig_it_srv
fi
done
}
host_it_srv() {
${HOSTCMD} -t srv $SRV_HOST | sort -k5 |
while read line; do
set $line ; PORT=$7 ; HOST=$8
/bin/echo -e "\thost ${HOST%.}:${PORT}"
done
}
host_it_naptr() {
${HOSTCMD} -t naptr ${REALM} | grep x-eduroam:radius.tls | sort -k5 |
while read line; do
set $line ; TYPE=$7 ; HOST=${10}
if [ "$TYPE" = "\"s\"" ]; then
SRV_HOST=${HOST%.}
host_it_srv
fi
done
}
if [ -x "${DIGCMD}" ]; then
SERVERS=$(dig_it_naptr)
elif [ -x "${HOSTCMD}" ]; then
SERVERS=$(host_it_naptr)
else
/bin/echo "${0} requires either \"dig\" or \"host\" command."
exit 1
fi
if [ -n "${SERVERS}" ]; then
/bin/echo -e "server dynamic_radsec.${REALM} {\n${SERVERS}\n\ttype TLS\n}"
exit 0
fi
exit 0
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