hostap/wpa_supplicant/examples/p2p-action-udhcp.sh

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#!/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 [ "$4" = "GO" ]; then
kill_daemon udhcpc /var/run/udhcpc-$GIFNAME.pid
ifconfig $GIFNAME 192.168.42.1 up
udhcpd /etc/udhcpd-p2p.conf
fi
if [ "$4" = "client" ]; then
kill_daemon udhcpc /var/run/udhcpc-$GIFNAME.pid
kill_daemon udhcpd /var/run/udhcpd-$GIFNAME.pid
udhcpc -i $GIFNAME -p /var/run/udhcpc-$GIFNAME.pid \
-s /etc/udhcpc.script
fi
fi
if [ "$CMD" = "P2P-GROUP-REMOVED" ]; then
GIFNAME=$3
if [ "$4" = "GO" ]; then
kill_daemon udhcpd /var/run/udhcpd-$GIFNAME.pid
ifconfig $GIFNAME 0.0.0.0
fi
if [ "$4" = "client" ]; then
kill_daemon udhcpc /var/run/udhcpc-$GIFNAME.pid
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