hostap/wpa_supplicant/examples/p2p-action.sh
Jouni Malinen afa4926c95 P2P: Use alternative way of starting dnsmasq if needed
Some other dnsmasq users (like libvirt) seem to be binding the DHCP
server to all interfaces which prevents the previously used mechanism
here from working (bind on the DHCP socket fails). If a failure is
noticed, try to start dnsmasq with -z option to avoid that.
2010-11-26 15:47:13 +02:00

83 lines
2.2 KiB
Bash
Executable file

#!/bin/sh
IFNAME=$1
CMD=$2
kill_daemon() {
NAME=$1
PF=$2
if [ ! -r $PF ]; then
return
fi
PID=`cat $PF`
if [ $PID -gt 0 ]; then
if ps $PID | grep -q $NAME; then
kill $PID
fi
fi
rm $PF
}
if [ "$CMD" = "P2P-GROUP-STARTED" ]; then
GIFNAME=$3
if [ "$4" = "GO" ]; then
kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid
rm /var/run/dhclient.leases-$GIFNAME
kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME
ifconfig $GIFNAME 192.168.42.1 up
if ! dnsmasq -x /var/run/dnsmasq.pid-$GIFNAME \
-i $GIFNAME \
-F192.168.42.11,192.168.42.99; then
# another dnsmasq instance may be running and blocking us; try to
# start with -z to avoid that
dnsmasq -x /var/run/dnsmasq.pid-$GIFNAME \
-i $GIFNAME \
-F192.168.42.11,192.168.42.99 --listen-address 192.168.42.1 -z
fi
fi
if [ "$4" = "client" ]; then
kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid
rm /var/run/dhclient.leases-$GIFNAME
kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME
dhclient -pf /var/run/dhclient-$GIFNAME.pid \
-lf /var/run/dhclient.leases-$GIFNAME \
-nw \
$GIFNAME
fi
fi
if [ "$CMD" = "P2P-GROUP-REMOVED" ]; then
GIFNAME=$3
if [ "$4" = "GO" ]; then
kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME
ifconfig $GIFNAME 0.0.0.0
fi
if [ "$4" = "client" ]; then
kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid
rm /var/run/dhclient.leases-$GIFNAME
ifconfig $GIFNAME 0.0.0.0
fi
fi
if [ "$CMD" = "P2P-CROSS-CONNECT-ENABLE" ]; then
GIFNAME=$3
UPLINK=$4
# enable NAT/masquarade $GIFNAME -> $UPLINK
iptables -P FORWARD DROP
iptables -t nat -A POSTROUTING -o $UPLINK -j MASQUERADE
iptables -A FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT
sysctl net.ipv4.ip_forward=1
fi
if [ "$CMD" = "P2P-CROSS-CONNECT-DISABLE" ]; then
GIFNAME=$3
UPLINK=$4
# disable NAT/masquarade $GIFNAME -> $UPLINK
sysctl net.ipv4.ip_forward=0
iptables -t nat -D POSTROUTING -o $UPLINK -j MASQUERADE
iptables -D FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -D FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT
fi