157 lines
3.6 KiB
Bash
Executable File
157 lines
3.6 KiB
Bash
Executable File
#!/bin/bash
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# Configuration =======================================================================================================
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SSID="$HOSTNAME" # Default SSID to device hostname
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PASSWORD="guesswhatitis" # Default password if not specified
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DHCP_IP="10.10.10.1" # Device IP on access point
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DHCP_START="10.10.10.2" # Start of DHCP IP pool
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DHCP_END="10.10.10.254" # End of DHCP IP pool
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# End of Configuration ================================================================================================
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DISABLE=false
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FAILOVER=""
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QUIET=false
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SCRIPT="$(basename $0)"
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show_help() {
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cat <<EOF
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Usage: $SCRIPT [OPTIONS]
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Options:
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-d, --disable Turn off access point
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-f, --failover Automatically turn on/off on network disconnect/connect
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--failover=false Disable automatic on/off on disconnect/connect
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-h, --help Show this help message
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-q, --quiet Run without output
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--ssid SSID The SSID for the access point
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--passwd PASSWORD The password for the access point
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EOF
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}
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is_connected() {
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[ -n "$(iwgetid -r)" ]
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}
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is_on() {
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[ "$(systemctl is-active hostapd)" == "active" ]
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}
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enable_ap() {
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if is_on; then
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log_message "Access point is already on"
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exit
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fi
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log_message "Turning on access point: $SSID"
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systemctl stop dhcpcd
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systemctl stop wpa_supplicant
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systemctl stop systemd-resolved
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ip link set wlan0 down
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ip link set wlan0 up
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ip addr add "$DHCP_IP/24" dev wlan0
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# Configure and start hostapd
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cat <<EOF > /etc/hostapd/hostapd.conf
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interface=wlan0
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ssid=$SSID
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hw_mode=g
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channel=4
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wpa=2
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wpa_passphrase=$PASSWORD
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wpa_key_mgmt=WPA-PSK
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wpa_pairwise=TKIP
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rsn_pairwise=CCMP
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EOF
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systemctl unmask hostapd
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systemctl start hostapd
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# Configure and start dnsmasq
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cat <<EOF > /etc/dnsmasq.conf
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interface=wlan0
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dhcp-range=$DHCP_START,$DHCP_END,255.255.255.0,24h
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EOF
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systemctl start dnsmasq
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}
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disable_ap() {
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if ! is_on; then
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log_message "Access point is already off"
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exit
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fi
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log_message "Turning off access point..."
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ip addr del "$DHCP_IP/24" dev wlan0
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systemctl stop hostapd
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systemctl stop dnsmasq
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systemctl start systemd-resolved
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systemctl restart dhcpcd
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}
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enable_cron() {
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if [ -z "$(which crontab)" ]; then
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echo "Error: Please install crontab"
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exit 1
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fi
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sed -i "/$SCRIPT/d" /etc/crontab
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echo "* * * * * root $(realpath $0) --ssid '$SSID' --passwd '$PASSWORD' -q -f" >> /etc/crontab
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echo "Access point failover enabled"
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}
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disable_cron() {
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sed -i "/$SCRIPT/d" /etc/crontab
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echo "Access point failover disabled"
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}
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log_message() {
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if [ "$QUIET" != "true" ]; then
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echo "$1"
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fi
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}
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# Parse command line arguments
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while [[ "$#" -gt 0 ]]; do
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case $1 in
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-d|--disable) DISABLE=true ;;
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-f|--failover) FAILOVER=true ;;
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--failover=false) FAILOVER=false ;;
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-h|--help) show_help && exit ;;
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-q|--quiet) QUIET=true ;;
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--ssid) shift && SSID="$1" ;;
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--passwd) shift && PASSWORD="$1" ;;
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*)
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echo "Unknown option: $1"
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show_help
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exit 1
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;;
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esac
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shift
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done
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# Check for permissions
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if [ "$UID" != "0" ]; then
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echo "Error: Please run as root"
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exit 1
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fi
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if [ -n "$FAILOVER" ]; then
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if [ "$FAILOVER" == "false" ]; then
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disable_cron
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exit
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fi
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if [ -z "$(grep "$SCRIPT" /etc/crontab)" ]; then
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enable_cron
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fi
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if is_connected; then
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DISABLE=true
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fi
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fi
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if [ "$DISABLE" == "true" ]; then
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disable_ap
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else
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enable_ap
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fi
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