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net/tcp/Kconfig, include/nuttx/net/netconfig.h: Make RTO and WAIT_TIME configurable. This fix is not really correct: TCP RTO really should be calculated dynamically for each TCP connection: http://sgros.blogspot.com/2012/02/calculating-tcp-rto.html.

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This commit is contained in:
zhangyuan7 2019-08-26 11:03:27 -06:00 committed by Gregory Nutt
parent 32bac84548
commit ba598841e5
2 changed files with 28 additions and 9 deletions
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25
include/nuttx/net/netconfig.h
View File

@ -9,7 +9,7 @@
* Note: Network configuration options the netconfig.h should not be changed,
* but rather the per-project defconfig file.
*
* Copyright (C) 2007, 2011, 2014-2015, 2017-2018 Gregory Nutt. All rights
* Copyright (C) 2007, 2011, 2014-2015, 2017-2019 Gregory Nutt. All rights
* reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
@ -382,11 +382,18 @@
#endif
/* The initial retransmission timeout counted in timer pulses.
* REVISIT: TCP RTO really should be calculated dynamically for each TCP
* connection:
*
* This should not be changed.
* https://unix.stackexchange.com/questions/210367/changing-the-tcp-rto-value-in-linux
* http://sgros.blogspot.com/2012/02/calculating-tcp-rto.html
*/
#define TCP_RTO 3
#ifdef CONFIG_NET_TCP_RTO
# define TCP_RTO CONFIG_NET_TCP_RTO
#else
# define TCP_RTO 3
#endif
/* The maximum number of times a segment should be retransmitted
* before the connection should be aborted.
@ -526,13 +533,13 @@
# define MIN_TCP_MSS __MIN_TCP_MSS(__IPv6_HDRLEN)
#endif
/* How long a connection should stay in the TIME_WAIT state.
*
* This configuration option has no real implication, and it should be
* left untouched. Units: half second.
*/
/* How long a connection should stay in the TIME_WAIT state. */
#define TCP_TIME_WAIT_TIMEOUT (60*2)
#ifdef CONFIG_NET_TCP_WAIT_TIMEOUT
# define TCP_TIME_WAIT_TIMEOUT CONFIG_NET_TCP_WAIT_TIMEOUT
#else
# define TCP_TIME_WAIT_TIMEOUT (60*2)
#endif
/* ARP configuration options */

12
net/tcp/Kconfig
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@ -41,6 +41,18 @@ config NET_TCP_CONNS
---help---
Maximum number of TCP/IP connections (all tasks)
config NET_TCP_RTO
int "RTO of TCP/IP connections"
default 3
---help---
RTO of TCP/IP connections (all tasks)
config NET_TCP_WAIT_TIMEOUT
int "TIME_WAIT Length of TCP/IP connections"
default 120
---help---
TIME_WAIT Length of TCP/IP connections (all tasks)
config NET_MAX_LISTENPORTS
int "Number of listening ports"
default 20