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WiFi DualStack setup (AP+STA) UCI (console)

In this document we'll describe how to setup second virtual wireless interface with UCI (console) to connect to upstream wireless network and work as simple repeater in router mode.

Main disadvantage of this setup is speed drop twice to end client connected to our AP wireless virtual interface.

Also AP interface will not be available until sta interface is connected to uplink (for now, will be resolved with fallback daemon). This is due to impossibility of virtual interfaces to work on different channels simultaneously, so physical interface must first acquire channel number after connecting station, so AP interface will also work on same channel.

Description

To make AP+STA repeater in router mode we need to add openwrt network interface, openwrt firewall rule and additional wireless wifi interface in Client (sta) mode.

All this can be done with editing configuration files or by using uci utility. All steps are presented in corresponding sections.

Setup with UCI

1. Connect to device with SSH By default device has IPv4 address 192.168.1.1 and no password for root user. Just press enter with blank password when connecting to device.

ssh root@192.168.1.1

2. Add OpenwWrt network interface

To do this, execute next commands:

uci rename network.$(uci add network interface)=wsta
uci set network.wsta.proto='dhcp'
uci commit

Here we created new interface section with name wsta and assigned dhcp protocol to assign addresses on it.

3. Add OpenWrt firewall zone and rules

Here we create new zone called wsta_zone and assign early created wsta network interface to it. Also we enabled Masquerading with masq option and allow input, forward and output directives to make it possible to control device from uplink wireless network.

uci rename firewall.$(uci add firewall zone)=wsta_zone
uci set firewall.wsta_zone.network='wsta'
uci set firewall.wsta_zone.name='wsta_zone'
uci set firewall.wsta_zone.mtu_fix='1'
uci set firewall.wsta_zone.masq='1'
uci set firewall.wsta_zone.input='ACCEPT'
uci set firewall.wsta_zone.forward='ACCEPT'
uci set firewall.wsta_zone.output='ACCEPT'
uci commit

Next we enable forwarding between lan firewall zone and our wsta_zone to make it possible to access networks from one to another, Internet can also be accessible with this directives.

uci rename firewall.$(uci add firewall forwarding)=wsta2lan
uci set firewall.wsta2lan.dest='lan'
uci set firewall.wsta2lan.src='wsta_zone'


uci rename firewall.$(uci add firewall forwarding)=lan2wsta
uci set firewall.lan2wsta.dest='wsta_zone'
uci set firewall.lan2wsta.src='lan'

uci commit

4. Add New wireless interface

Ta add additional virtual wireless interface in Client mode you can execute next commands from console.

network option points to our earlier created wsta network interface.

mode option sets to be sta for station in Infrastructure networks.

ssid option is the name of uplink wireless interface.

encryption option sets wireless encryption paramaters, it can be none,

psk-mixed or psk2. Usually psk-mixed is universal.

key option is the encryption key for uplink wireless network.

uci rename wireless.$(uci add wireless wifi-iface)=wsta_wifi
uci set wireless.wsta_wifi.device='radio0'
uci set wireless.wsta_wifi.network='wsta'
uci set wireless.wsta_wifi.mode='sta'
uci set wireless.wsta_wifi.ssid='HomeLan'
uci set wireless.wsta_wifi.encryption='psk-mixed'
uci set wireless.wsta_wifi.key='123456789'

uci commit

5. Apply all changes.

To apply changes you can reboot device or execute next commands:

/etc/init.d/firewall restart
/etc/init.d/network restart

Setup with editing configuration files.

You can also use embedded editor vi in openwrt to apply changes.

1. Connect to device with SSH By default device has IPv4 address 192.168.1.1 and no password for root user. Just press enter with blank password when connecting to device.

ssh root@192.168.1.1

2. Add OpenwWrt network interface section to /etc/config/network file

config interface 'wsta'
        option proto 'dhcp'

3. Add OpenWrt firewall zone and rules to /etc/config/firewall file

config zone 'wsta_zone'
        option network 'wsta'
        option name 'wsta_zone'
        option mtu_fix '1'
        option masq '1'
        option input 'ACCEPT'
        option forward 'ACCEPT'
        option output 'ACCEPT'

config forwarding 'wsta2lan'
        option dest 'lan'
        option src 'wsta_zone'

config forwarding 'lan2wsta'
        option dest 'wsta_zone'
        option src 'lan'

4. Add New wireless interface to /etc/config/wireless file

config wifi-iface 'wsta_wifi'
        option device 'radio0'
        option network 'wsta'
        option mode 'sta'
        option ssid 'HomeLan'
        option encryption 'psk-mixed'
        option key '123456789'

5. Apply all changes.

To apply changes you can reboot device or execute next commands:

/etc/init.d/firewall restart
/etc/init.d/network restart