[riot-notifications] [RIOT-OS/RIOT] gnrc_sixlowpan_frag: drop received duplicates (#10776)

Martine Lenders notifications at github.com
Tue Jan 15 19:52:08 CET 2019


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### Contribution description
Otherwise duplicate fragments are added to the number of already
received datagram bytes in L153 leading to possible race-conditions.

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### Testing procedure
Ping should still work for large packets. Also the expected results from #10701 should be the outcome.

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### Issues/PRs references
Fixes #10701 (hopefully).
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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/10776

-- Commit Summary --

  * gnrc_sixlowpan_frag: drop received duplicates

-- File Changes --

    M sys/net/gnrc/network_layer/sixlowpan/frag/rbuf.c (7)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/10776.patch
https://github.com/RIOT-OS/RIOT/pull/10776.diff

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