Hi, there!
I'm developing a mobile device, that should be able to store a number of
wifi client connections, and connect
to the best available AP. The requirement a subset of that what
connection managers like network-manager,
connman or wcid do.
Currently I store each wifi client 'connection' within a 'wifi-iface'
config section in /etc/config/wireless. If a specific
connection requires manual configuration (proto=static), also a
associated network is created.
This approach is a bit cumbersome, because of a number of reasons:
*) For each stored 'connection' a new 'wlanN' Interface, is brought up.
Usually also an associated instance of
wpa_supplicant is launched, consuming startup time, memory, and cpu
resources.
*) Logically there is exactly one 'wifi client connection'. To determine
it's state, one has to check each of those
interfaces.
*) Manual network configurations for a wifi client connection, add new
network interfaces, that have to be taken
into account with the firewall.
I hacked the mac80211.sh script to put each 'wifi-iface' that discribes
a client connection into a 'network'
definition of a single wpa_supplicant instance. This way I get one
client interface, that associates to the
best known AP. This works reasonably well, but also has a drawback:
When some specific client connection needs manual configuration (ip,
netmask, dns, gateway,...), and doesn't
rely on dhcp, I have to let a daemon/script listen to wpa_supplicant's
control interface until wpa_supplicant
connects successfully, and apply those settings using some daemon/script,
What would be a sane way to handle changing Wifi client connections with
different associated network settings
using the existing openwrt infrastructure?
cheers,
Christian
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