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CC2420: improve the address filtering #8

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@yatch yatch commented Jan 18, 2017

The frame filtering feature of (simulated) CC2420 mistakenly drops a received frame when its sequence number is suppressed. This PR resolves the issue as well as makes it support the IEEE 802.15.4-2015 frame or frame version 0b10.

Due to the complexity of handling PAN ID Compression field for frame version 0b10, the additional code gets long... The code refers to test-panid-handling.c in the comments so that we can see what combinations of the key fields are addressed in each if or else if block.

Travis got green on the tip of a contiki branch including this change in mspsim.

- support the IEEE 802.15.4-2015 frame
- handle the case when Sequence Number is suppressed
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