oblique
parent
5abc21fb7e
commit
29d609cf24
85
create_ap
85
create_ap
@ -31,13 +31,15 @@ usage() {
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echo " 'none' for no Internet sharing (equivalent to -n)"
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echo " --hidden Make the Access Point hidden (do not broadcast the SSID)"
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echo " --driver Choose your WiFi adapter driver (default: nl80211)"
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echo " --no-virt Do not create virtual interface"
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echo
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echo "Non-Bridging Options:"
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echo " -g <gateway> IPv4 Gateway for the Access Point (default: 192.168.12.1)"
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echo " -d DNS server will take into account /etc/hosts"
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echo
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echo "Useful informations:"
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echo " * You can create an AP with the same interface you are getting your Internet connection."
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echo " * If you're not using the --no-virt option, then you can create an AP with the same"
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echo " interface you are getting your Internet connection."
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echo " * You can pass your SSID and password through pipe or through arguments (see examples)."
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echo
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echo "Examples:"
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@ -125,8 +127,10 @@ ETC_HOSTS=0
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HIDDEN=0
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SHARE_METHOD=nat
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DRIVER=nl80211
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NO_VIRT=0
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CONFDIR=
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WIFI_IFACE=
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VWIFI_IFACE=
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INTERNET_IFACE=
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BRIDGE_IFACE=
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@ -149,7 +153,7 @@ cleanup() {
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if [[ "$SHARE_METHOD" != "none" ]]; then
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if [[ "$SHARE_METHOD" == "nat" ]]; then
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iptables -t nat -D POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
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iptables -D FORWARD -i ${VWIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT
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iptables -D FORWARD -i ${WIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT
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iptables -D FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT
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[[ -n $OLD_IP_FORWARD ]] && echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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@ -165,10 +169,18 @@ cleanup() {
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iptables -D INPUT -p udp -m udp --dport 67 -j ACCEPT
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fi
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ip link set down dev ${VWIFI_IFACE}
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ip addr flush ${VWIFI_IFACE}
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networkmanager_rm_unmanaged ${VWIFI_IFACE} ${OLD_MACADDR}
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iw dev ${VWIFI_IFACE} del
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if [[ $NO_VIRT -eq 0 ]]; then
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if [[ -n $VWIFI_IFACE ]]; then
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ip link set down dev ${VWIFI_IFACE}
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ip addr flush ${VWIFI_IFACE}
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networkmanager_rm_unmanaged ${VWIFI_IFACE} ${OLD_MACADDR}
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iw dev ${VWIFI_IFACE} del
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fi
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else
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ip link set down dev ${WIFI_IFACE}
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ip addr flush ${WIFI_IFACE}
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networkmanager_rm_unmanaged ${WIFI_IFACE}
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fi
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}
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die() {
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@ -180,7 +192,7 @@ die() {
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# if the user press ctrl+c then execute die()
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trap "die" SIGINT
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ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden","driver:" -n $(basename $0) -- "$@")
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ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden","driver:","no-virt" -n $(basename $0) -- "$@")
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[[ $? -ne 0 ]] && exit 1
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eval set -- "$ARGS"
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@ -227,6 +239,10 @@ while :; do
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DRIVER="$1"
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shift
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;;
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--no-virt)
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shift
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NO_VIRT=1
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;;
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--)
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shift
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break
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@ -252,13 +268,6 @@ if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD"
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fi
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WIFI_IFACE=$1
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VWIFI_IFACE=${WIFI_IFACE}ap
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WIFI_IFACE_CHANNEL=$(iw ${WIFI_IFACE} info | grep channel | awk '{print $2}')
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if [[ -n $WIFI_IFACE_CHANNEL && $WIFI_IFACE_CHANNEL -ne $CHANNEL ]]; then
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echo "hostapd will fail to use channel $CHANNEL because $WIFI_IFACE is already set to channel $WIFI_IFACE_CHANNEL, fallback to channel $WIFI_IFACE_CHANNEL."
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CHANNEL=$WIFI_IFACE_CHANNEL
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fi
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if [[ "$SHARE_METHOD" == "bridge" ]]; then
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OLD_BRIDGE_IPTABLES=$(cat /proc/sys/net/bridge/bridge-nf-call-iptables)
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@ -324,24 +333,36 @@ fi
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CONFDIR=$(mktemp -d /tmp/create_ap.${WIFI_IFACE}.conf.XXXXXXXX)
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echo "Config dir: $CONFDIR"
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echo -n "Creating a virtual WiFi interface... "
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iw dev ${VWIFI_IFACE} del > /dev/null 2>&1
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if iw dev ${WIFI_IFACE} interface add ${VWIFI_IFACE} type __ap; then
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echo "${VWIFI_IFACE} created."
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else
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die "Failed to create a virtual WiFi interface from ${WIFI_IFACE}."
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if [[ $NO_VIRT -eq 0 ]]; then
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VWIFI_IFACE=${WIFI_IFACE}ap
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WIFI_IFACE_CHANNEL=$(iw ${WIFI_IFACE} info | grep channel | awk '{print $2}')
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if [[ -n $WIFI_IFACE_CHANNEL && $WIFI_IFACE_CHANNEL -ne $CHANNEL ]]; then
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echo "hostapd will fail to use channel $CHANNEL because $WIFI_IFACE is already set to channel $WIFI_IFACE_CHANNEL, fallback to channel $WIFI_IFACE_CHANNEL."
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CHANNEL=$WIFI_IFACE_CHANNEL
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fi
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echo -n "Creating a virtual WiFi interface... "
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iw dev ${VWIFI_IFACE} del > /dev/null 2>&1
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if iw dev ${WIFI_IFACE} interface add ${VWIFI_IFACE} type __ap; then
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echo "${VWIFI_IFACE} created."
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else
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VWIFI_IFACE=
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die "Failed to create a virtual WiFi interface from ${WIFI_IFACE}."
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fi
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OLD_MACADDR=$(get_macaddr ${VWIFI_IFACE})
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NEW_MACADDR=$(get_new_macaddr ${VWIFI_IFACE})
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WIFI_IFACE=${VWIFI_IFACE}
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fi
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OLD_MACADDR=$(get_macaddr ${VWIFI_IFACE})
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NEW_MACADDR=$(get_new_macaddr ${VWIFI_IFACE})
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networkmanager_add_unmanaged ${VWIFI_IFACE}
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networkmanager_add_unmanaged ${WIFI_IFACE}
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[[ $HIDDEN -eq 1 ]] && echo "Access Point's SSID is hidden!"
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# hostapd config
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cat << EOF > $CONFDIR/hostapd.conf
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ssid=${SSID}
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interface=${VWIFI_IFACE}
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interface=${WIFI_IFACE}
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driver=${DRIVER}
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hw_mode=g
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channel=${CHANNEL}
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@ -367,7 +388,7 @@ if [[ "$SHARE_METHOD" == "bridge" ]]; then
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else
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# dnsmasq config (dhcp + dns)
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cat << EOF > $CONFDIR/dnsmasq.conf
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interface=${VWIFI_IFACE}
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interface=${WIFI_IFACE}
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bind-interfaces
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dhcp-range=${GATEWAY%.*}.1,${GATEWAY%.*}.254,255.255.255.0,24h
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dhcp-option=option:router,${GATEWAY}
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@ -376,12 +397,14 @@ EOF
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fi
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# initialize WiFi interface
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ip link set dev ${VWIFI_IFACE} address ${NEW_MACADDR} || die
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ip link set down dev ${VWIFI_IFACE} || die
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ip addr flush ${VWIFI_IFACE} || die
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if [[ $NO_VIRT -eq 0 ]]; then
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ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die
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fi
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ip link set down dev ${WIFI_IFACE} || die
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ip addr flush ${WIFI_IFACE} || die
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if [[ "$SHARE_METHOD" != "bridge" ]]; then
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ip link set up dev ${VWIFI_IFACE} || die
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ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${VWIFI_IFACE} || die
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ip link set up dev ${WIFI_IFACE} || die
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ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${WIFI_IFACE} || die
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fi
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# enable Internet sharing
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@ -389,7 +412,7 @@ if [[ "$SHARE_METHOD" != "none" ]]; then
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echo "Sharing Internet using method: $SHARE_METHOD"
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if [[ "$SHARE_METHOD" == "nat" ]]; then
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iptables -t nat -I POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE || die
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iptables -I FORWARD -i ${VWIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT || die
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iptables -I FORWARD -i ${WIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT || die
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iptables -I FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT || die
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echo 1 > /proc/sys/net/ipv4/ip_forward || die
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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