Designed to work on Raspberry Pi (arm) using as base image alpine linux (very little size).
Since my last change on ISP, they put a cable modem with a horrible Wireless, it drops lots of packets, and I didn't want to put an extra AP or wireless router.
Most of the time use wireless devices on same room so I decided to try to convert my current Pi on a small Access Point using a small USB dongle.
On the host system, the ralink firmware (in my case) should be installed so you can use it on AP mode. On debian/raspbian:
apt-get install firmware-ralink
Make sure your USB support AP mode:
# iw list
...
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* WDS
* monitor
* mesh point
...
Set country regulations, for example, to Spain set:
# iw reg set ES
country ES: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
(5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS
(5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
(57000 - 66000 @ 2160), (N/A, 40), (N/A)
For modification, testings, etc.. there is already a Makefile. So you can make run to start a sample ssid with a simple password.
I've already uploaded the image to docker hubs, so you can run it from ther like this:
sudo docker run -d -t \
-e INTERFACE=wlan0 \
-e CHANNEL=6 \
-e SSID=runssid \
-e AP_ADDR=192.168.254.1 \
-e SUBNET=192.168.254.0 \
-e WPA_PASSPHRASE=passw0rd \
-e OUTGOINGS=eth0 \
--privileged \
--net host \
sdelrio/rpi-hostap:latest
But before this, hostap usually requires that wlan0 interface to be already up, so before docker run take the interface up:
/sbin/ifconfig wlan0 192.168.254.1/24 up
Also you should have a driver to enable hostap on your USB wifi (if you are using Pi 3 integrated WiFI you won't need this).
apt-get install firmware-ralink
Make sure you are not runing wpa_supplicant on your host machine or docker container will tell messages like wlan0: Could not connect to kernel driver.
# ps uaxf |grep wpa_supplicant
root 22619 0.0 0.4 6616 3700 ? Ss 22:04 0:00 /sbin/wpa_supplicant -s -B -P /run/wpa_supplicant.wlan0.pid -i wlan0 -D nl80211,wext -C /run/wpa_supplicant
| Name | Required | Description | Default Value |
|---|---|---|---|
| INTERFACE | true | The wireless interface | |
| CHANNEL | false | WiFi Channel to use | 11 |
| SSID | false | WiFi Name | raspberry |
| AP_ADDR | false | Access Point IP Address | 192.168.254.1 |
| SUBNET | false | WiFi network subnet | 192.168.254.0 |
| WPA_PASSPHRASE | false | WiFi Password | passw0rd |
| OUTGOINGS | false | Interfaces to external traffic | |
| HW_MODE | false | Hardware protocol | g |
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