VPN zentral-Server-skript

Datei: /etc/init.d/vpn

#!/bin/sh

fkt_infotext() {
        logger -p daemon.info -t $0 $1
        echo $1
}

fkt_write_olsrd_conf() {
        fkt_infotext "generating olsrd.conf ..."
        cp /etc/olsrd.conf_head /etc/olsrd.conf
        awk '/ifup/ {print $3,$12}' /etc/vtund.conf|
        while read IFACE NODE
                do
cat>>/etc/olsrd.conf<<EOF

Interface "$IFACE" {
        HelloInterval           50.0
        HelloValidityTime       900.0
        TcInterval              30.0
        TcValidityTime          2700.0
        MidInterval             150.0
        MidValidityTime         2700.0
        HnaInterval             150.0
        HnaValidityTime         900.0

        Ip4Broadcast 10.63.$NODE.253
        LinkQualityMult default 0.1
}
EOF
        done
}

fkt_netcount_start() {
        fkt_infotext "installing netfilter counters ..."
        iptables -N vpn_user_outgoing
        iptables -N vpn_olsr_outgoing
        iptables -N vpn_user_incoming
        iptables -N vpn_olsr_incoming
        iptables -I OUTPUT -o tap+                      -j vpn_user_outgoing
        iptables -I OUTPUT -o tap+ -p udp --sport 698   -j vpn_olsr_outgoing
        iptables -I INPUT  -i tap+                      -j vpn_user_incoming
        iptables -I INPUT  -i tap+ -p udp --dport 698   -j vpn_olsr_incoming
        awk '/ifup/ {print $3}' /etc/vtund.conf|
        while read IFACE
                do
                iptables -I vpn_user_outgoing -i $IFACE -j ACCEPT
                iptables -I vpn_olsr_outgoing -i $IFACE -j ACCEPT
                iptables -I vpn_user_incoming -i $IFACE -j ACCEPT
                iptables -I vpn_olsr_incoming -i $IFACE -j ACCEPT
                
        done
}

fkt_netcount_stop() {
        fkt_infotext "deleting netfilter counters ..."
        iptables -D OUTPUT -o tap+                      -j vpn_user_outgoing
        iptables -D OUTPUT -o tap+ -p udp --sport 698   -j vpn_olsr_outgoing
        iptables -D INPUT  -i tap+                      -j vpn_user_incoming
        iptables -D INPUT  -i tap+ -p udp --dport 698   -j vpn_olsr_incoming
        iptables -F vpn_olsr_outgoing
        iptables -F vpn_user_outgoing
        iptables -F vpn_olsr_incoming
        iptables -F vpn_user_incoming
        iptables -X vpn_olsr_outgoing
        iptables -X vpn_user_outgoing
        iptables -X vpn_olsr_incoming
        iptables -X vpn_user_incoming
}

fkt_start_vtund() {
        fkt_infotext "starting vtun-daemon ..."
        vtund -f /etc/vtund.conf -s
}

fkt_start_olsrd() {
        fkt_infotext "starting olsr-daemon ..."
        olsrd -f /etc/olsrd.conf -d 0
}

fkt_kill_olsrd() {
        fkt_infotext "ending olsrd-process ..."
        PID=$(pidof olsrd)
        test ! -z "$PID" && kill $PID
}

fkt_kill_vtund() {
        fkt_infotext "ending vtund-process ..."
        PID=$(pidof vtund)
        test ! -z "$PID" && kill $PID
}

fkt_interface_up() {
        fkt_infotext "starting interface $1 for node $2 ..."
        ip addr  add dev $1 10.63.$2.254/30 brd 10.63.$2.255
        ip link  set $1 mtu 1450 up
        fkt_infotext "setting host-routes for node $2 ..."
        ip route add 10.63.$2.253 dev $1
}

case $1 in
        start)
                fkt_write_olsrd_conf
                fkt_netcount_start
                fkt_start_vtund
                fkt_start_olsrd
        ;;
        stop)
                fkt_kill_olsrd
                fkt_kill_vtund
                fkt_netcount_stop
        ;;
        restart)
                $0 stop
                $0 start
        ;;
        ifup)
                fkt_interface_up $2 $3
        ;;
        *)
                echo "Usage: $0 (start|stop|restart|ifup INTERFACE NODE)"
        ;;
esac

Datei: /etc/olsrd.conf_head

DebugLevel              0
IpVersion               4
AllowNoInt              yes
Pollrate                0.05
TcRedundancy            2
MprCoverage             7
UseHysteresis           no
LinkQualityFishEye      0
LinkQualityWinSize      100
LinkQualityDijkstraLimit 0 5.0
LinkQualityLevel        2

#
# Achtung! Aenderungen nur in /etc/olsrd.conf_head machen! Siehe /etc/init.d/vpn!
#

#LoadPlugin "olsrd_quagga.so.0.2.2"
#{
#        PlParam "redistribute" "bgp"
#}

Hna4 {
        10.63.30.252 255.255.255.252
        10.63.30.0 255.255.255.240
        104.63.30.0 255.255.255.240
        104.61.0.0 255.255.0.0
}

IpcConnect {
        MaxConnections  1
        Host            127.0.0.1
        Net 10.63.0.0 255.0.0.0
}

Interface "venet0" {
        HelloInterval           5.0
        HelloValidityTime       90.0
        TcInterval              3.0
        TcValidityTime          270.0
        MidInterval             15.0
        MidValidityTime         270.0
        HnaInterval             15.0
        HnaValidityTime         90.0

        Ip4Broadcast 10.63.30.254
        LinkQualityMult default 0.1
}

Datei: /etc/vtund.conf

default                 {type ether; compress no; encrypt no; keepalive no; multi no; stat no; }

j2a                     {device tap0  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  82     ";};}
rembrandt               {device tap1  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  41     ";};} 
l18a_roof               {device tap2  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%   1     ";};}
rex                     {device tap3  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  54     ";};}
ranger                  {device tap4  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  20     ";};}
Bode                    {device tap5  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  37     ";};}
hababusch               {device tap6  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  33     ";};}
t65uplink               {device tap7  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  62     ";};}
weimarwest              {device tap8  ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  87     ";};}
trierer7                {device tap9  ; passwd ff ; up{program "/etc/init.d/vpn ifup %% 120     ";};}
m18-ping02              {device tap10 ; passwd ff ; up{program "/etc/init.d/vpn ifup %%   2     ";};}
stonebridge             {device tap11 ; passwd ff ; up{program "/etc/init.d/vpn ifup %%  39     ";};}
heller_und_pfennig      {device tap12 ; passwd ff ; up{program "/etc/init.d/vpn ifup %% 224     ";};}