[riot-notifications] [RIOT-OS/RIOT] sys/net/gnrc/sock: cleanup & fix aux handling (#15757)

Marian Buschsieweke notifications at github.com
Tue Jan 12 21:19:43 CET 2021

### Contribution description

The logic used to check whether the RX timestamp was send in the GNRC
implementation of `sock_ip_recv_buf_aux()` is incorrect: It still uses in-band
signalling via a timestamp of zero, but a dedicated flag was added to allow for
timestamps of zero.

Additionally the GNRC implementations of both `sock_ip_recv_buf_aux()` and
`sock_udp_recv_buf_aux()` have been simplified: There is little value to check
if a bit is set an than clearing it - one can just as well simply clear it

### Testing procedure

The tests `tests/gnrc_sock_ip` and `tests/gnrc_sock_udp` should still pass.

### Issues/PRs references

You can view, comment on, or merge this pull request online at:


-- Commit Summary --

  * sys/net/gnrc/sock: cleanup & fix aux handling

-- File Changes --

    M sys/net/gnrc/sock/ip/gnrc_sock_ip.c (13)
    M sys/net/gnrc/sock/udp/gnrc_sock_udp.c (13)

-- Patch Links --


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