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psock_tcp_cansend: return EWOULDBLOCK when send buffer is full

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with nonblocking sockets, POLLOUT is returned when the application
calls poll even if the send buffer is full

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
This commit is contained in:
zhanghongyu 2023-09-12 22:17:44 +08:00 committed by Petro Karashchenko
parent e90d58c3da
commit 2c39cfefef
1 changed files with 5 additions and 1 deletions
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6
net/tcp/tcp_send_buffered.c
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@ -1677,7 +1677,11 @@ int psock_tcp_cansend(FAR struct tcp_conn_s *conn)
* but we don't know how many more.
*/
if (tcp_wrbuffer_test() < 0 || iob_navail(true) <= 0)
if (tcp_wrbuffer_test() < 0 || iob_navail(true) <= 0
#if CONFIG_NET_SEND_BUFSIZE > 0
|| tcp_wrbuffer_inqueue_size(conn) >= conn->snd_bufs
#endif
)
{
return -EWOULDBLOCK;
}