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iperf: Do not busy loop on a connection closed by the peer

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Tested on esp32-devkitc.

The peer was iperf on NetBSD.
> iperf version 2.0.5 (08 Jul 2010) pthreads
This commit is contained in:
YAMAMOTO Takashi 2021-06-04 13:43:01 +09:00 • committed by Xiang Xiao
parent 1140bebfc0
commit f961a6cb0f
1 changed files with 14 additions and 1 deletions
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15
netutils/iperf/iperf.c
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@ -338,7 +338,20 @@ static int iperf_run_tcp_server(void)
while (!s_iperf_ctrl.finish)
{
actual_recv = recv(sockfd, buffer, want_recv, 0);
if (actual_recv < 0)
if (actual_recv == 0)
{
printf("closed by the peer: %s,%d\n",
inet_ntoa(remote_addr.sin_addr),
htons(remote_addr.sin_port));
/* Note: unlike the original iperf, this implementation
* exits after finishing a single connection.
*/
s_iperf_ctrl.finish = true;
break;
}
else if (actual_recv < 0)
{
iperf_show_socket_error_reason("tcp server recv",
listen_socket);