[incubator-nuttx] 01/05: psock_tcp_recvfrom: Add a comment about window updates

[xi...@apache.org]

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commit 0c606ecb8e0048840639f52bc7268e8b63ada2bd
Author: YAMAMOTO Takashi <ya...@midokura.com>
AuthorDate: Fri May 28 17:02:42 2021 +0900

    psock_tcp_recvfrom: Add a comment about window updates
---
 net/tcp/tcp_recvfrom.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/tcp/tcp_recvfrom.c b/net/tcp/tcp_recvfrom.c
index 1d11d76..973a5c5 100644
--- a/net/tcp/tcp_recvfrom.c
+++ b/net/tcp/tcp_recvfrom.c
@@ -809,7 +809,12 @@ ssize_t psock_tcp_recvfrom(FAR struct socket *psock, FAR void *buf,
         }
     }
 
-  /* Receive additional data from read-ahead buffer, send the ACK timely. */
+  /* Receive additional data from read-ahead buffer, send the ACK timely.
+   *
+   * Revisit: Because IOBs are system-wide resources, consuming the read
+   * ahead buffer would update recv window of all connections in the system,
+   * not only this particular connection.
+   */
 
   if (conn->rcv_wnd == 0 && conn->rcv_ackcb == NULL)
     {