Use the new tundev API from libosmocore to create tun devices for each
configured (and enbled) APN.
No address nor routes are yet set on the tun devices because we still
lack GMM/SNDCP/LLC/RLCMAC layers to negotiate them.
A follow up patch will add some code to interact with the SNDCP layer.
Depends: libosmocore.git Change-Id I3463271666df1e85746fb7b06ec45a17024b8c53
Change-Id: I86cac406843157aa2e51727cf8ccac9804d7961d
This commit adds an initial set of VTY commands to manage APN
configuration and set up, which is used by the modem app.
The sample modem.cfg file is updated to showcase how to configure APNs.
The app doesn't do anything with them yet. A follow up patch will add
code to create tun devices for each configured APN.
Change-Id: I7b4eaa0de428b418bb1d89bd544694e89beb3e6e