From 4bd506b7f5ce5ee041432061ae48a51b9c66ff5d Mon Sep 17 00:00:00 2001
From: SPRESENSE <41312067+SPRESENSE@users.noreply.github.com>
Date: Thu, 6 Aug 2020 10:50:56 +0900
Subject: [PATCH] apps/examples/usrsocktest: Add MSG_PEEK flag support

Do not decrement the recv_avail_bytes if MSG_PEEK flag is specified.
---
 examples/usrsocktest/usrsocktest_daemon.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/examples/usrsocktest/usrsocktest_daemon.c b/examples/usrsocktest/usrsocktest_daemon.c
index f92e5705f..0c11a445f 100644
--- a/examples/usrsocktest/usrsocktest_daemon.c
+++ b/examples/usrsocktest/usrsocktest_daemon.c
@@ -879,7 +879,12 @@ prepare:
         {
           char tmp = 'a' + i;
 
-          tsock->recv_avail_bytes--;
+          /* Check if MSG_PEEK flag is specified. */
+
+          if ((req->flags & MSG_PEEK) != MSG_PEEK)
+            {
+              tsock->recv_avail_bytes--;
+            }
 
           wlen = write(fd, &tmp, 1);
           if (wlen < 0)