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runqemu-ifdown: clean up the remaining iptables rules 

The iptables rules for the tap interface are added by runqemu-ifup
everytime we use runqemu to start a qemu target. But it's not cleaned
up when runqemu exits.

This patch cleans up the remaining iptables rules for the tap interface
in runqemu-ifdown.

[YOCTO #5047]

(From OE-Core rev: ef38a0aed35357d035ca587162158cd2f55b958f)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Chen Qi 2013-08-28 10:52:03 +08:00 committed by Richard Purdie
parent 5bffc4ff4d
commit b2a0e3ad91
1 changed files with 14 additions and 0 deletions
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14
scripts/runqemu-ifdown
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@ -50,3 +50,17 @@ if [ ! -e "$TUNCTL" ]; then
fi
$TUNCTL -d $TAP
# cleanup the remaining iptables rules
IPTABLES=`which iptables 2> /dev/null`
if [ "x$IPTABLES" = "x" ]; then
IPTABLES=/sbin/iptables
fi
if [ ! -x "$IPTABLES" ]; then
echo "$IPTABLES cannot be executed"
exit 1
fi
n=$[ (`echo $TAP | sed 's/tap//'` * 2) + 1 ]
dest=$[ (`echo $TAP | sed 's/tap//'` * 2) + 2 ]
$IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$n/32
$IPTABLES -D POSTROUTING -t nat -j MASQUERADE -s 192.168.7.$dest/32