Emergency Calls (2nd round)

From: Andras Domokos <[email protected]>

Here is a new proposal for emergency calls handling.

Steps in handling emergency calls:
- subscribe to modem online notifications (add modem online watcher)
- an emergency call detected (phone number is emergency number)
- increment emergency mode
- switch modem online if not in online mode
- advertise "EmergencyMode" property change on D-Bus (for first call)
- if modem is not online postpone making the call, otherwise make de emergency call
- when modem online notification comes and there is postponed call request make the emergency call
- when an emergency call ends decrement emergency mode
- advertise "EmergencyMode" property change on D-Bus (for last call)

Note: modem remains online even if it was offline before starting the emergency call

Andras Domokos (3):
modem: add modem online-offline watch
modem: add EmergencyMode property
voicecall: add emergency call handling

 src/modem.c     |   99 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/ofono.h     |   12 ++++++
 src/voicecall.c |  101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 211 insertions(+), 1 deletions(-)