* Added a DAO lifetime timer that sends out a new DAO after half the lifetime of the DAO. This allows implementing DAO route soft state that avoids routing tables in the network keeping stale routes for ever.
* Added ways to schedule a new DAO transmission as well as cancelling an active DAO transmit timer, which makes it possible to do nodes that don't send DAOs.
- Structural modification of RPL data storage.
- Support multiple gateways (multiple DODAG-ID with a unique InstanceID)
- Use Lollipop counters
- Add leaf-only configuration option for RPL
Bugfix :
- Correctly send "Grounded" flag in DIO
300 bytes, as well as cleaner protocol logic.
* Made parent management uniform.
* Simplified the DIO processing.
* Improved the Objective Function API and its documentation.
* Removed redundant code at various places.
* Improved identifier naming.
* Switched visualization from candidate parents to preferred parents only.
* Made DAO ACK transmissions configurable.
* Improved initial ETX guess by using a cached local confidence value.
* Added a periodical rank recalculation function to reduce
the maximum stack depth.
* Increased the Trickle redundancy constant to ensure faster
topological updates.
Extended the objective function API with a callback function that receives link-layer neighbor information.
Throttled DAO transmissions to one per DEFAULT_DAO_LATENCY period.
Added support for an ETX objective function (hysteresis control still lacking though).
Fixed a leak of routes installed by DAOs.
Control that dst_adv_supported is set before sending DAOs.
Improved debugging output.
