chao.an 608436a75f net/sockopt: do not set the errno to SO_ERROR
SO_ERROR is used to report asynchronous errors that are the result
of events within the network stack and not synchronous errors that
are the result of a library call(send/recv/connect)

Synchronous results are reported via errno.

Linux Programmer's Manual
...
NAME
       getsockopt, setsockopt - get and set options on sockets
...
RETURN VALUE
...
       On error, -1 is returned, and errno is set appropriately

Change-Id: I1a1a05a684dff8672aaf47eabee157ac0d275c2d
Signed-off-by: chao.an <anchao@xiaomi.com>
2020-05-14 07:53:15 -06:00
..
2020-01-02 10:54:43 -06:00
2020-01-02 10:54:43 -06:00