From 242e03a8bdba8639ed4d3ff4cdfbc28a2d8c27a1 Mon Sep 17 00:00:00 2001
From: occheung <dc@m-labs.hk>
Date: Fri, 25 Sep 2020 17:07:29 +0800
Subject: [PATCH] tcp_stack: add keep-alive

---
 src/nal_tcp_client.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/nal_tcp_client.rs b/src/nal_tcp_client.rs
index 314a60c..5d3627b 100644
--- a/src/nal_tcp_client.rs
+++ b/src/nal_tcp_client.rs
@@ -120,6 +120,8 @@ impl<'a, 'b, 'c, 'n> embedded_nal::TcpStack for NetworkStack<'a, 'b, 'c, 'n> {
                 internal_socket
                     .connect((address, remote.port()), self.get_ephemeral_port())
                     .map_err(|_| NetworkError::ConnectionFailure)?;
+                internal_socket
+                    .set_keep_alive(Some(net::time::Duration::from_millis(1000)));
             }
             embedded_nal::IpAddr::V6(addr) => {
                 let address = {
@@ -132,6 +134,8 @@ impl<'a, 'b, 'c, 'n> embedded_nal::TcpStack for NetworkStack<'a, 'b, 'c, 'n> {
                 internal_socket
                     .connect((address, remote.port()), self.get_ephemeral_port())
                     .map_err(|_| NetworkError::ConnectionFailure)?;
+                internal_socket
+                    .set_keep_alive(Some(net::time::Duration::from_millis(1000)));
             }
         };