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Filename :
p2p-action.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 [ "$4" = "GO" ]; then kill_daemon dhclient /var/run/dhclient-$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 -p 0 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 ipaddr=`echo "$*" | sed 's/.* ip_addr=\([^ ]*\).*/\1/'` ipmask=`echo "$*" | sed 's/.* ip_mask=\([^ ]*\).*/\1/'` goipaddr=`echo "$*" | sed 's/.* go_ip_addr=\([^ ]*\).*/\1/'` if echo "$ipaddr$ipmask$goipaddr" | grep -q ' '; then ipaddr="" ipmask="" goipaddr="" fi if [ -n "$ipaddr" ]; then sudo ifconfig $GIFNAME "$ipaddr" netmask "$ipmask" sudo ip ro re default via "$goipaddr" exit 0 fi 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