1 #!/bin/sh 2 3 IFNAME=$1 4 CMD=$2 5 6 kill_daemon() { 7 NAME=$1 8 PF=$2 9 10 if [ ! -r $PF ]; then 11 return 12 fi 13 14 PID=`cat $PF` 15 if [ $PID -gt 0 ]; then 16 if ps $PID | grep -q $NAME; then 17 kill $PID 18 fi 19 fi 20 rm $PF 21 } 22 23 if [ "$CMD" = "P2P-GROUP-STARTED" ]; then 24 GIFNAME=$3 25 if [ "$4" = "GO" ]; then 26 kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid 27 rm /var/run/dhclient.leases-$GIFNAME 28 kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME 29 ifconfig $GIFNAME 192.168.42.1 up 30 if ! dnsmasq -x /var/run/dnsmasq.pid-$GIFNAME \ 31 -i $GIFNAME \ 32 -F192.168.42.11,192.168.42.99; then 33 # another dnsmasq instance may be running and blocking us; try to 34 # start with -z to avoid that 35 dnsmasq -x /var/run/dnsmasq.pid-$GIFNAME \ 36 -i $GIFNAME \ 37 -F192.168.42.11,192.168.42.99 --listen-address 192.168.42.1 -z 38 fi 39 fi 40 if [ "$4" = "client" ]; then 41 kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid 42 rm /var/run/dhclient.leases-$GIFNAME 43 kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME 44 dhclient -pf /var/run/dhclient-$GIFNAME.pid \ 45 -lf /var/run/dhclient.leases-$GIFNAME \ 46 -nw \ 47 $GIFNAME 48 fi 49 fi 50 51 if [ "$CMD" = "P2P-GROUP-REMOVED" ]; then 52 GIFNAME=$3 53 if [ "$4" = "GO" ]; then 54 kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME 55 ifconfig $GIFNAME 0.0.0.0 56 fi 57 if [ "$4" = "client" ]; then 58 kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid 59 rm /var/run/dhclient.leases-$GIFNAME 60 ifconfig $GIFNAME 0.0.0.0 61 fi 62 fi 63 64 if [ "$CMD" = "P2P-CROSS-CONNECT-ENABLE" ]; then 65 GIFNAME=$3 66 UPLINK=$4 67 # enable NAT/masquarade $GIFNAME -> $UPLINK 68 iptables -P FORWARD DROP 69 iptables -t nat -A POSTROUTING -o $UPLINK -j MASQUERADE 70 iptables -A FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT 71 iptables -A FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT 72 sysctl net.ipv4.ip_forward=1 73 fi 74 75 if [ "$CMD" = "P2P-CROSS-CONNECT-DISABLE" ]; then 76 GIFNAME=$3 77 UPLINK=$4 78 # disable NAT/masquarade $GIFNAME -> $UPLINK 79 sysctl net.ipv4.ip_forward=0 80 iptables -t nat -D POSTROUTING -o $UPLINK -j MASQUERADE 81 iptables -D FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT 82 iptables -D FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT 83 fi 84
