RTNL sync or async when creating GPRS Context for STE modem.

[Sjur BRENDELAND]

Hi Marcel.

I have finally got around to do some coding in oFono again,
and have started to look into creating CAIF Network Interface 
using RTNL, instead using socket ioctls.
 
I have started out by doing the RTNL handling async, 
i.e. registering the RTNL socket with g_io_add_watch etc.
But I'm not really happy with the code as it feels
unnecessary complex, introduces new states in gprs-context.c. etc.

So I would like to do the RTNL handling synchronous instead,
as this would reduce complexity. But I just wanted your opinion
on this before I start refactoring my code.

Do you see any issues with doing RTNL request synchronous
i.e. sending out RTM_NEWLINK request and a waiting for 
RTM_NEWLINK response followed by NLMSG_ERROR,
(or just NLMSG_ERROR if unsuccessful)?


Regards
Sjur