p2p-action.sh revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1#!/bin/sh
2
3IFNAME=$1
4CMD=$2
5
6kill_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 $PF
21}
22
23if [ "$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	    $GIFNAME
48    fi
49fi
50
51if [ "$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 $GIFNAME 0.0.0.0
61    fi
62fi
63
64if [ "$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 $UPLINK -j ACCEPT
72    sysctl net.ipv4.ip_forward=1
73fi
74
75if [ "$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
83fi
84