From 81ce32efc7ddebf1f09851d4e4ac34681f436e57 Mon Sep 17 00:00:00 2001
From: helge <helgewurst@web.de>
Date: 周六, 06 11月 2021 22:00:24 +0800
Subject: [PATCH] set keep-alive defaults for new connections
---
examples/test-LwIP-netconn/scpi_server.c | 8 ++++++++
examples/test-LwIP-netconn/scpi_server.h | 3 +++
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/examples/test-LwIP-netconn/scpi_server.c b/examples/test-LwIP-netconn/scpi_server.c
index 309dd38..9252ba5 100644
--- a/examples/test-LwIP-netconn/scpi_server.c
+++ b/examples/test-LwIP-netconn/scpi_server.c
@@ -253,6 +253,10 @@
} else {
/* connection established */
iprintf("***Connection established %s\r\n", inet_ntoa(newconn->pcb.ip->remote_ip));
+ newconn->pcb.tcp->so_options |= SOF_KEEPALIVE;
+ newconn->pcb.tcp->keep_idle = SCPI_KEEP_IDLE; // Override TCP_KEEPIDLE_DEFAULT for this connection.
+ newconn->pcb.tcp->keep_intvl = SCPI_KEEP_INTVL; // Override TCP_KEEPINTVL_DEFAULT for this connection.
+ newconn->pcb.tcp->keep_cnt = SCPI_KEEP_CNT; // Override TCP_KEEPCNT_DEFAULT for this connection.
user_data->io = newconn;
}
}
@@ -270,6 +274,10 @@
} else {
/* control connection established */
iprintf("***Control Connection established %s\r\n", inet_ntoa(newconn->pcb.ip->remote_ip));
+ newconn->pcb.tcp->so_options |= SOF_KEEPALIVE;
+ newconn->pcb.tcp->keep_idle = SCPI_KEEP_IDLE; // Override TCP_KEEPIDLE_DEFAULT for this connection.
+ newconn->pcb.tcp->keep_intvl = SCPI_KEEP_INTVL; // Override TCP_KEEPINTVL_DEFAULT for this connection.
+ newconn->pcb.tcp->keep_cnt = SCPI_KEEP_CNT; // Override TCP_KEEPCNT_DEFAULT for this connection.
user_data->control_io = newconn;
}
}
diff --git a/examples/test-LwIP-netconn/scpi_server.h b/examples/test-LwIP-netconn/scpi_server.h
index 4d2895f..b9900ef 100644
--- a/examples/test-LwIP-netconn/scpi_server.h
+++ b/examples/test-LwIP-netconn/scpi_server.h
@@ -29,6 +29,9 @@
#ifndef _SCPI_SERVER_H_
#define _SCPI_SERVER_H_
+#define SCPI_KEEP_IDLE 2000 // (ms) keepalive quiet time after last TCP packet
+#define SCPI_KEEP_INTVL 1000 // (ms) keepalive repeat interval
+#define SCPI_KEEP_CNT 4 // Retry count before terminating connection (SCPI_KEEP_INTVL * SCPI_KEEP_INTVL (ms)).
#include <stdint.h>
--
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