commit eebf018b6cf6de4d017a2bed1d324400a18eec4a
parent fb266ab79829fdbc896874a7e10734fb21c667f5
Author: oblique <psyberbits@gmail.com>
Date: Sun, 24 Nov 2013 14:48:14 +0200
Create virtual interface. You can now use the same interface to get and share Internet.
Diffstat:
| M | create_ap | | | 65 | +++++++++++++++++++++++++++++++++++++++++++++++------------------ |
1 file changed, 47 insertions(+), 18 deletions(-)
diff --git a/create_ap b/create_ap
@@ -1,15 +1,23 @@
#!/bin/bash
-# dependencies:
+# general dependencies:
# bash (to run this script)
# util-linux (for getopt)
# hostapd
# iproute2
+# iw
# haveged (optional)
-# dnsmasq (needed for 'nat' or 'none' Internet sharing method)
-# iptables (needed for 'nat' Internet sharing method)
-# bridge-utils (needed for 'bridge' Internet sharing method)
-# dhclient (needed for 'bridge' Internet sharing method)
+
+# dependencies for 'none' Internet sharing method
+# dnsmasq
+
+# dependencies for 'nat' Internet sharing method
+# dnsmasq
+# iptables
+
+# dependencies for 'brigde' Internet sharing method
+# bridge-utils
+# dhclient
usage() {
echo "Usage: $(basename $0) [options] <wifi-interface> [<interface-with-internet>] [<access-point-name> [<passphrase>]]"
@@ -30,11 +38,21 @@ usage() {
echo " -g <gateway> IPv4 Gateway for the Access Point (default: 192.168.12.1)"
echo " -d DNS server will take into account /etc/hosts"
echo
+ echo "Useful informations:"
+ echo " * You can create an Access Point from the same interface you are getting Internet."
+ echo
+ echo " * If you want to pass the <access-point-name> and <passphrase> from stdin, you"
+ echo " must not use them in the argument list. You must the put <access-point-name>"
+ echo " at the first line and <passphrase> at the second line. See examples."
+ echo
echo "Examples:"
echo " $(basename $0) wlan0 eth0 MyAccessPoint MyPassPhrase"
+ echo " echo -e 'MyAccessPoint\nMyPassPhrase' | $(basename $0) wlan0 eth0"
+ echo " $(basename $0) wlan0 eth0 MyAccessPoint"
+ echo " echo 'MyAccessPoint' | $(basename $0) wlan0 eth0"
+ echo " $(basename $0) wlan0 wlan0 MyAccessPoint MyPassPhrase"
echo " $(basename $0) -n wlan0 MyAccessPoint MyPassPhrase"
echo " $(basename $0) -m bridge wlan0 eth0 MyAccessPoint MyPassPhrase"
- echo " echo -e 'MyAccessPoint\nMyPassPhrase' | $(basename $0) wlan0 eth0"
}
get_macaddr() {
@@ -206,7 +224,17 @@ else
fi
fi
-networkmanager_add_unmanaged ${WIFI_IFACE}
+echo -n "Creating a virtual WiFi interface... "
+VWIFI_IFACE=${WIFI_IFACE}ap
+iw dev ${VWIFI_IFACE} del > /dev/null 2>&1
+if iw dev ${WIFI_IFACE} interface add ${VWIFI_IFACE} type __ap; then
+ echo "${VWIFI_IFACE} created."
+else
+ echo "FAILED!"
+ exit 1
+fi
+
+networkmanager_add_unmanaged ${VWIFI_IFACE}
CONFDIR=$(mktemp -d /tmp/create_ap.${WIFI_IFACE}.conf.XXXXXXXX)
echo "Config dir: $CONFDIR"
@@ -216,7 +244,7 @@ echo "Config dir: $CONFDIR"
# hostapd config
cat << EOF > $CONFDIR/hostapd.conf
ssid=${SSID}
-interface=${WIFI_IFACE}
+interface=${VWIFI_IFACE}
driver=nl80211
hw_mode=g
channel=${CHANNEL}
@@ -242,7 +270,7 @@ if [[ "$SHARE_METHOD" == "bridge" ]]; then
else
# dnsmasq config (dhcp + dns)
cat << EOF > $CONFDIR/dnsmasq.conf
-interface=${WIFI_IFACE}
+interface=${VWIFI_IFACE}
bind-interfaces
dhcp-range=${GATEWAY%.*}.1,${GATEWAY%.*}.254,255.255.255.0,24h
dhcp-option=option:router,${GATEWAY}
@@ -251,11 +279,11 @@ EOF
fi
# initialize WiFi interface
-ip link set down dev ${WIFI_IFACE}
-ip addr flush ${WIFI_IFACE}
+ip link set down dev ${VWIFI_IFACE}
+ip addr flush ${VWIFI_IFACE}
if [[ "$SHARE_METHOD" != "bridge" ]]; then
- ip link set up dev ${WIFI_IFACE}
- ip addr add ${GATEWAY}/24 dev ${WIFI_IFACE}
+ ip link set up dev ${VWIFI_IFACE}
+ ip addr add ${GATEWAY}/24 dev ${VWIFI_IFACE}
fi
# enable Internet sharing
@@ -263,7 +291,7 @@ if [[ "$SHARE_METHOD" != "none" ]]; then
echo "Sharing Internet using method: $SHARE_METHOD"
if [[ "$SHARE_METHOD" == "nat" ]]; then
iptables -t nat -A POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
- iptables -A FORWARD -i ${WIFI_IFACE} -j ACCEPT
+ iptables -A FORWARD -i ${VWIFI_IFACE} -j ACCEPT
OLD_IP_FORWARD=$(cat /proc/sys/net/ipv4/ip_forward)
echo 1 > /proc/sys/net/ipv4/ip_forward
elif [[ "$SHARE_METHOD" == "bridge" ]]; then
@@ -308,14 +336,15 @@ rm -rf $CONFDIR
if [[ "$SHARE_METHOD" != "none" ]]; then
if [[ "$SHARE_METHOD" == "nat" ]]; then
iptables -t nat -D POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
- iptables -D FORWARD -i ${WIFI_IFACE} -j ACCEPT
+ iptables -D FORWARD -i ${VWIFI_IFACE} -j ACCEPT
echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
elif [[ "$SHARE_METHOD" == "bridge" ]]; then
ip link set down $BRIDGE_IFACE
brctl delbr $BRIDGE_IFACE
fi
fi
-ip link set down dev ${WIFI_IFACE}
-ip addr flush ${WIFI_IFACE}
-networkmanager_rm_unmanaged ${WIFI_IFACE}
+ip link set down dev ${VWIFI_IFACE}
+ip addr flush ${VWIFI_IFACE}
+networkmanager_rm_unmanaged ${VWIFI_IFACE}
+iw dev ${VWIFI_IFACE} del
exit 0
