[riot-notifications] [RIOT-OS/RIOT] posix_socket: initialize uninitialized fields (#11575)

Martine Lenders notifications at github.com
Fri May 24 15:16:09 CEST 2019


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### Contribution description
Some fields of `_sock_tl_ep` were not initialized when converting a sockaddr to a `_sock_tl_ep`. Though currently the only missing field is `netif` it is safer to use `memset()` here, to make the implementation more future proof.
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### Testing procedure
Flash and run the application provided in https://github.com/RIOT-OS/RIOT/issues/11212 on 2 `samr21-xpro`s. Without this PR, the `echo send` command will report errno 22 (`EINVAL`), with it it will report `EBADF` (or crash if https://github.com/RIOT-OS/RIOT/issues/11212#issuecomment-495617061 is not applied).
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### Issues/PRs references
Addresses https://github.com/RIOT-OS/RIOT/issues/11212 but does not fix it, as that issue contains multiple bugs.
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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/11575

-- Commit Summary --

  * posix_socket: initialize uninitialized fields

-- File Changes --

    M sys/posix/sockets/posix_sockets.c (2)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/11575.patch
https://github.com/RIOT-OS/RIOT/pull/11575.diff

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