OrgApache/incubator-nuttx
OrgApache
/
incubator-nuttx
mirror of https://github.com/apache/incubator-nuttx.git
1
0
Fork 0
Code Issues Releases Wiki Activity

net/tcp: Be consistent with units of TIME_WAIT. Units were unspecified in tcp/Kconfig, but assumed to be in units of half seconds in tcp/timer.h. include/nuttx/netconfig does not indicate the units but is apparently assuming seconds. This commit unifies all delays to clearly specified units of seconds.

This commit is contained in:
Gregory Nutt 2019-11-24 09:19:54 -06:00
parent 1a56fefb9f
commit 9efadaefc1
3 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
include/nuttx/net/netconfig.h
View File

@ -533,7 +533,17 @@
# define MIN_TCP_MSS __MIN_TCP_MSS(__IPv6_HDRLEN)
#endif
/* How long a connection should stay in the TIME_WAIT state. */
/* How long a connection should stay in the TIME_WAIT state.
*
* TIME_WAIT is often also known as the 2MSL wait state. This is because
* the socket that transitions to TIME_WAIT stays there for a period that
* is 2 x Maximum Segment Lifetime in duration. The MSL is the maximum
* amount of time that any segment can remain valid on the network before
* being discarded. This time limit is ultimately bounded by the TTL field
* in the IP datagram that is used to transmit the TCP segment. RFC 793
* specifies MSL as 2 minutes but most systems permit this value to be tuned.
* Here a default of 2 minutes is used, half the value specified by RFC 793.
*/
#ifdef CONFIG_NET_TCP_WAIT_TIMEOUT
# define TCP_TIME_WAIT_TIMEOUT CONFIG_NET_TCP_WAIT_TIMEOUT

3
net/tcp/Kconfig
View File

@ -51,7 +51,8 @@ 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)
TIME_WAIT Length of TCP/IP connections (all tasks). In units
of seconds.
config NET_MAX_LISTENPORTS
int "Number of listening ports"

6
net/tcp/tcp_timer.c
View File

@ -73,7 +73,7 @@
* Input Parameters:
* dev - The device driver structure to use in the send operation
* conn - The TCP "connection" to poll for TX data
* hsed - The polling interval in halves of a second
* hsec - The polling interval in units of halves of a second
*
* Returned Value:
* None
@ -143,11 +143,11 @@ void tcp_timer(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
/* Check if the timer exceeds the timeout value */
if (newtimer >= TCP_TIME_WAIT_TIMEOUT)
if (newtimer >= (TCP_TIME_WAIT_TIMEOUT * HSEC_PER_SEC))
{
/* Set the timer to the maximum value */
conn->timer = TCP_TIME_WAIT_TIMEOUT;
conn->timer = TCP_TIME_WAIT_TIMEOUT * HSEC_PER_SEC;
/* The TCP connection was established and, hence, should be bound
* to a device. Make sure that the polling device is the one that