quickwifiap

Maybe you know the situation: For security purposes, you routinely change the WiFi credentials in your household. You've just finished the migration and all clients now work with the new network. All devices? Nooooooo, because you forgot that one device that still knows the old credentials and that you now cannot reach anymore.

So do you change all the config back? No, you use quickwifiap: It creates a WiFi access point for you (using hostapd), starts a DNS/DHCP server using dnsmasq and optionally even sets up the routes so that your new WiFi network is NATted into the Internet. With that network you can now quickly reconfigure the device and everything is fine.

Dependencies

hostapd, dnsmasq.

Usage

usage: quickwifiap [-h] [-v] config_file

Quick Wifi AP configuration.

positional arguments:
  config_file    JSON file that specifies the network configuration to use

optional arguments:
  -h, --help     show this help message and exit
  -v, --verbose  Increases verbosity. Can be specified multiple times to
                 increase.

The configuration JSON file is fairly self-explanatory:

{
    "interface":            "wlan0",
    "essid":                "Free Wifi",
    "network":              "172.16.42.0/24",
    "nat_ext_interface":    "eth0",
    "security": {
        "mode":     "wpa2-psk",
        "psk":      "foobar123"
    }
}

Above configuration would start a "Free Wifi" on wlan0, using network 172.16.42.0/24 and WPA2-PSK with the passphrase "foobar123", routing traffic to the Internet through eth0.

License

GNU GPL-3.