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 -p 0 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 ipaddr=`echo "$*" | sed 's/.* ip_addr=\([^ ]*\).*/\1/'` 45 ipmask=`echo "$*" | sed 's/.* ip_mask=\([^ ]*\).*/\1/'` 46 goipaddr=`echo "$*" | sed 's/.* go_ip_addr=\([^ ]*\).*/\1/'` 47 if echo "$ipaddr$ipmask$goipaddr" | grep -q ' '; then 48 ipaddr="" 49 ipmask="" 50 goipaddr="" 51 fi 52 if [ -n "$ipaddr" ]; then 53 sudo ifconfig $GIFNAME "$ipaddr" netmask "$ipmask" 54 sudo ip ro re default via "$goipaddr" 55 exit 0 56 fi 57 dhclient -pf /var/run/dhclient-$GIFNAME.pid \ 58 -lf /var/run/dhclient.leases-$GIFNAME \ 59 -nw \ 60 $GIFNAME 61 fi 62 fi 63 64 if [ "$CMD" = "P2P-GROUP-REMOVED" ]; then 65 GIFNAME=$3 66 if [ "$4" = "GO" ]; then 67 kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME 68 ifconfig $GIFNAME 0.0.0.0 69 fi 70 if [ "$4" = "client" ]; then 71 kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid 72 rm /var/run/dhclient.leases-$GIFNAME 73 ifconfig $GIFNAME 0.0.0.0 74 fi 75 fi 76 77 if [ "$CMD" = "P2P-CROSS-CONNECT-ENABLE" ]; then 78 GIFNAME=$3 79 UPLINK=$4 80 # enable NAT/masquarade $GIFNAME -> $UPLINK 81 iptables -P FORWARD DROP 82 iptables -t nat -A POSTROUTING -o $UPLINK -j MASQUERADE 83 iptables -A FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT 84 iptables -A FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT 85 sysctl net.ipv4.ip_forward=1 86 fi 87 88 if [ "$CMD" = "P2P-CROSS-CONNECT-DISABLE" ]; then 89 GIFNAME=$3 90 UPLINK=$4 91 # disable NAT/masquarade $GIFNAME -> $UPLINK 92 sysctl net.ipv4.ip_forward=0 93 iptables -t nat -D POSTROUTING -o $UPLINK -j MASQUERADE 94 iptables -D FORWARD -i $UPLINK -o $GIFNAME -m state --state RELATED,ESTABLISHED -j ACCEPT 95 iptables -D FORWARD -i $GIFNAME -o $UPLINK -j ACCEPT 96 fi 97
