From 6ef7435082c8eec29ed603895a8626d23ecea5f2 Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Thu, 11 Mar 2021 12:26:20 +0800
Subject: [PATCH] net/tcp: correct the cache output

Change-Id: I30e9352ca9c032e707a86f327c902a976f0cb375
Signed-off-by: chao.an <anchao@xiaomi.com>
---
 net/tcp/tcp_input.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/net/tcp/tcp_input.c b/net/tcp/tcp_input.c
index 330c21ca643..caa15542a35 100644
--- a/net/tcp/tcp_input.c
+++ b/net/tcp/tcp_input.c
@@ -521,6 +521,7 @@ found:
 
           dev->d_len += hdrlen;
           tcp_input_cache(dev, conn, iplen);
+          dev->d_len -= hdrlen;
 
           tcp_send(dev, conn, TCP_ACK, tcpiplen);
           return;
@@ -1165,6 +1166,12 @@ static void tcp_process_cache(FAR struct net_driver_s *dev, uint8_t domain,
 
           tcp_input(dev, domain, iplen, NULL);
 
+          if (dev->d_len > 0)
+            {
+              d_len = dev->d_len;
+              memcpy(d_buf, dev->d_buf, d_len);
+            }
+
           iob_free_queue(iob, &conn->pendingahead,
                          IOBUSER_NET_TCP_PENDINGAHEAD);