ppp

[Rémi Denis-Courmont]

Le samedi 14 novembre 2009 21:26:38 Chris Pitchford, vous avez écrit :
> When connecting to an APN for MMS services, there is the possibility of a
> clash of IP addresses both with other APN connections and with other
> internet connections (for example wifi)..

You'd have to implement TCP/IP in userspace also, which wouldn't be too nice. 
With recent kernels (2.6.29 and up), you'd rather want to create a new network 
kernel namespace, containing the MMS interface and the one or few processes 
sending or receiving MMS.

That avoids the IP range conflicts while not needing to reimplement TCP/IP. It 
also still works if the modem exposes GPRS through sone kernel driver such 
that you cannot cleanly send and receive IP packets in userspace anyway. 
Currently, there aren't any in oFono, as both PPP and Phonet can provide IP 
packets to userspace. But that does not mean there won't ever be any.

-- 
Rémi Denis-Courmont
http://www.remlab.net/