[riot-notifications] [RIOT-OS/RIOT] net/sock: Add access to auxiliary data (API only) (#14703)

Marian Buschsieweke notifications at github.com
Fri Nov 6 10:17:58 CET 2020

> On the time stamps in sending: Do the socket send functions necessarily block until the the data was sent through the physical interface?

E.g. [`sock_udp_send()`](http://api.riot-os.org/group__net__sock__udp.html#ga89562920ad89fe0e098fc989e3b064ec) returns:

> The number of bytes sent on success.

And a negative errno code on failure. Thus, those have to block until the network driver reports that the transmission has succeeded. And by that time the timestamp is also available.

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