Create virtual interface. You can now use the same interface to get and share Internet.
This commit is contained in:
oblique
parent
fb266ab798
commit
eebf018b6c
65
create_ap
65
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
|
||||
|
||||
Loading…
Reference in New Issue
Block a user