#!/bin/bash
+#
+# This is a control script to start and stop the network activity
+# listening.
-CMD=${1-start}
-NET=192.168.249
-TAP=tap0
+CONF="hourglass.conf"
+function getcfg() {
+ awk -v K="$1" '$1==K {print;exit;}' $CONF |
+ sed 's/^[^=]*=\s*//;s/\s*$//'
+}
+NET="$(getcfg listener.net)"
+TAP="$(getcfg listener.tap)"
+SET="$(getcfg ipset.table)"
+CMD="${1-start}"
+
+cat <<EOF
+NET=$NET:
+TAP=$TAP:
+SET=$SET:
+EOF
cd $(dirname $0)
RULE=( ! -o $TAP -j TEE --gateway $NET.2 --oif $TAP )
case "$CMD" in
start)
+ # start the blocking rule
+ if iptables-save | grep -qs "match-set $SET" ; then
+ : # all fine
+ else
+ if ipset list $SET >& /dev/null ; then
+ : # The set exists
+ else
+ ipset create $SET hash:net
+ fi
+ iptables -A FORWARD -m set --match-set $SET src -j DROP
+ fi
+ # Start the traffic listener
if ifconfig $TAP >& /dev/null ; then
echo "Already started"
else
date >> /tmp/hourglass-listener.log
- newlisp listener.lsp >> /tmp/hourglass-listener.log 2>&1 &
+ ./hourglass listener >> /tmp/hourglass-listener.log 2>&1 &
while sleep 1 ; do
ifconfig $TAP >& /dev/null && break
- echo $TAP not up yet
+ echo $TAP not up yet >&2
done
ifconfig $TAP $NET.1 up
iptables -t mangle -A FORWARD ${RULE[@]}
fi
;;
stop)
- iptables -t mangle -F FORWARD
if ifconfig $TAP >& /dev/null ; then
- pkill -2 -f listener.lsp
+ pkill -2 -f "hourglass listener"
else
echo "Already stopped"
fi
+ ipset flush $SET
+ iptables -t mangle -D FORWARD ${RULE[@]}
;;
*)
echo "Unknown: $CMD"