auto lo

iface lo inet loopback
iface eth0 inet static
address 192.168.1.115
netmask 255.255.255.0
network 192.168.1.1
broadcast 192.168.255
gateway 192.168.1.1

auto wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet static
address 192.168.1.115
netmask 255.255.255.0
gateway 192.168.1.1
network 192.168.1.1
broadcast 192.168.1.255

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
    update_config=1

    network={
            ssid="secret-ssid"
            psk="secret-psk"
            proto=WPA
            key_mgmt=WPA-PSK
            pairwise=TKIP
            auth_alg=OPEN
    }