rtl8188eu/control_ap

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#!/bin/sh
# Script to start/stop a hostapd-based access point
#
# Sample start call "control_ap start wlan0 eth0"
# Stop with "control_ap stop"
#
case "$1" in
start)
if [ $# -ne 3 ]
then
echo "Usage: $0 start AP_iface NET_iface"
exit 1
fi
;;
stop)
if [ $# -ne 1 ]
then
echo "Usage: $0 stop"
exit 1
fi
;;
*)
echo "Usage:"
echo "$0 start AP-iface net_iface"
echo "or"
echo "$0 stop"
exit 1
;;
esac
# Symbols for needed programs
IPTABLES=/sbin/iptables
IFCONFIG=/usr/bin/ifconfig
DHCPD=/sbin/dhcpd
HOSTAPD=$(pwd)/hostapd-2.9/hostapd/hostapd
# Symbols for AP and external interfaces
NET_AP=$2
NET_EXT=$3
# First 3 octets of IP address for the AP
AP_ADDR=192.168.0
# IP address for nameserver
NAME_SERVER=8.8.8.8
# AP Channel, SSID, Encryption method, driver, and Encryption secret
AP_CHANNEL=11
AP_SSID=rtwap
WPA_SECRET="87654321"
ENCRYPT_MODE=2
DRIVER=rtl871xdrv
case "$1" in
start)
echo "Starting AP mode for $NET_AP at address $AP_ADDR.1"
# Disable packet forwarding
echo 0 > /proc/sys/net/ipv4/ip_forward
# Stop any existing hostapd and dhcpd daemons
killall -q hostapd
killall -q dhcpd
#Set up forwarding
$IPTABLES -t nat -A POSTROUTING -o $NET_EXT -j MASQUERADE
$IPTABLES -A FORWARD -i $NET_EXT -o $NET_AP -m state \
--state RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A FORWARD -i $NET_AP -o $NET_EXT -j ACCEPT
# Get the AP interface in the right state
$IFCONFIG $NET_AP down
$IFCONFIG $NET_AP up
$IFCONFIG $NET_AP $AP_ADDR.1
# dhcpd needs to have a leases file available - create it if needed
if [ ! -f /var/lib/dhcp/db/dhcpd.leases ]; then
mkdir -p /var/lib/dhcp/db
touch /var/lib/dhcp/db/dhcpd.leases
fi
# Write the DHCP server configuration file
echo "option domain-name-servers $NAME_SERVER;" > dhcpd.conf
echo "default-lease-time 600;" >> dhcpd.conf
echo "ddns-update-style none; ddns-updates off;" >> dhcpd.conf
echo "subnet $AP_ADDR.0 netmask 255.255.255.0 {" >> dhcpd.conf
echo " max-lease-time 7200;" >> dhcpd.conf
echo " range $AP_ADDR.200 $AP_ADDR.229;" >> dhcpd.conf
echo " option subnet-mask 255.255.255.0;" >> dhcpd.conf
echo " option broadcast-address $AP_ADDR.255;" >> dhcpd.conf
echo " option routers $AP_ADDR.1;" >> dhcpd.conf
echo "}" >> dhcpd.conf
# Bring up the DHCP server
$DHCPD -cf dhcpd.conf $NET_AP
# Write the hostapd configuration file
cat > hostapd << EOF
auth_algs=1
beacon_int=100
country_code=US
ctrl_interface_group=0
ctrl_interface=/var/run/hostapd
dtim_period=2
fragm_threshold=2346
#ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40][MAX-AMSDU-7935][DSSS_CCK-40]
#ieee80211d=1
#ieee80211n=1
ignore_broadcast_ssid=0
logger_stdout=-1
logger_stdout_level=2
logger_syslog=-1
logger_syslog_level=2
macaddr_acl=0
max_num_sta=255
rts_threshold=2347
wmm_ac_be_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmax=10
wmm_ac_be_cwmin=4
wmm_ac_be_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_bk_aifs=7
wmm_ac_bk_cwmax=10
wmm_ac_bk_cwmin=4
wmm_ac_bk_txop_limit=0
wmm_ac_vi_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmax=4
wmm_ac_vi_cwmin=3
wmm_ac_vi_txop_limit=94
wmm_ac_vo_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_cwmin=2
wmm_ac_vo_txop_limit=47
wmm_enabled=1
EOF
echo "interface=$NET_AP" >> hostapd
echo "ssid=$AP_SSID" >> hostapd
echo "driver=$DRIVER" >> hostapd
echo "hw_mode=g" >> hostapd
echo "channel=$AP_CHANNEL" >> hostapd
echo "wpa=$ENCRYPT_MODE" >> hostapd
echo "wpa_key_mgmt=WPA-PSK" >> hostapd
echo "wpa_pairwise=TKIP CCMP" >> hostapd
echo "rsn_pairwise=CCMP" >> hostapd
echo "wpa_passphrase=$WPA_SECRET" >> hostapd
# Enable packet forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
# Bring up hostapd
$HOSTAPD -dd -B hostapd
;;
stop)
echo "Stopping AP mode"
# Stop hostapd and dhcpd daemons
killall hostapd
killall dhcpd
rm -f hostapd
rm -f dhcpd.conf
;;
esac