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#!/sbin/openrc-run
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
start() {
ebegin "Starting p0f"
# The 'tcp and tcp[13] & 2 = 2' requires at least syn set.
# An alternative would be 'tcp and tcp[13] & 0x3f = 2', which
# is syn and no other major flags (but ECN enabled packets are OK)
if [ -z "$BpfFilter" ]; then
BpfFilter='tcp and tcp[13] & 2 = 2'
else
BpfFilter="$BpfFilter and tcp and tcp[13] & 2 = 2"
fi
# The command in backticks returns all the local IP addresses on this machine.
for OneIP in `/sbin/ifconfig 2>/dev/null | grep 'inet addr' | sed -e 's/.*addr://' -e 's/ .*//'` ; do
BpfFilter="$BpfFilter and not src host $OneIP"
done
# Create a lock file.
mkdir -p /var/lock/subsys
touch /var/lock/subsys/p0f
# Start up p0f and filter out all packets originating from any of this machines IP's.
if [ -z "${P0FLOGFILE}" ]; then
P0FLOGFILE="/var/log/p0f"
fi
einfo "Logfile: ${P0FLOGFILE}"
start-stop-daemon --start --quiet --pidfile /var/run/p0f.pid --exec /usr/sbin/p0f -- -i "${P0FDEVICE}" \
${P0FOPTIONS} -o "${P0FLOGFILE}" -d "${BpfFilter}" 2>/dev/null
eend ${?}
}
stop() {
ebegin "Stopping p0f"
start-stop-daemon --stop --quiet --pidfile /var/run/p0f.pid
rm -f /var/lock/subsys/p0f
eend ${?}
}
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