TCP timer management. More...
Go to the source code of this file.
Functions | |
| void | tcpTick (void) |
| TCP timer handler. More... | |
| void | tcpCheckRetransmitTimer (Socket *socket) |
| Check retransmission timer. More... | |
| void | tcpCheckPersistTimer (Socket *socket) |
| Check persist timer. More... | |
| void | tcpCheckKeepAliveTimer (Socket *socket) |
| Check TCP keep-alive timer. More... | |
| void | tcpCheckOverrideTimer (Socket *socket) |
| Check override timer. More... | |
| void | tcpCheckFinWait2Timer (Socket *socket) |
| Check FIN-WAIT-2 timer. More... | |
| void | tcpCheckTimeWaitTimer (Socket *socket) |
| Check 2MSL timer. More... | |
Detailed Description
TCP timer management.
License
SPDX-License-Identifier: GPL-2.0-or-later
Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.
This file is part of CycloneTCP Open.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- Version
- 2.4.4
Definition in file tcp_timer.h.
Function Documentation
◆ tcpCheckFinWait2Timer()
| void tcpCheckFinWait2Timer | ( | Socket * | socket | ) |
Check FIN-WAIT-2 timer.
The FIN-WAIT-2 timer prevents the connection from staying in the FIN-WAIT-2 state forever
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 393 of file tcp_timer.c.
◆ tcpCheckKeepAliveTimer()
| void tcpCheckKeepAliveTimer | ( | Socket * | socket | ) |
Check TCP keep-alive timer.
The TCP keep-alive timer feature provides a mechanism to identify dead connections. The other useful goal of keep-alive is to prevent inactivity from disconnecting the channel
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 240 of file tcp_timer.c.
◆ tcpCheckOverrideTimer()
| void tcpCheckOverrideTimer | ( | Socket * | socket | ) |
Check override timer.
To avoid a deadlock, it is necessary to have a timeout to force transmission of data, overriding the SWS avoidance algorithm. In practice, this timeout should seldom occur (refer to RFC 1122, section 4.2.3.4)
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 320 of file tcp_timer.c.
◆ tcpCheckPersistTimer()
| void tcpCheckPersistTimer | ( | Socket * | socket | ) |
Check persist timer.
The TCP persist timer is set by one end of a connection when it has data to send, but has been stopped because the other end has advertised a zero-sized window
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 183 of file tcp_timer.c.
◆ tcpCheckRetransmitTimer()
| void tcpCheckRetransmitTimer | ( | Socket * | socket | ) |
Check retransmission timer.
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 96 of file tcp_timer.c.
◆ tcpCheckTimeWaitTimer()
| void tcpCheckTimeWaitTimer | ( | Socket * | socket | ) |
Check 2MSL timer.
The purpose of the TIME-WAIT timer is to prevent delayed packets from one connection from being accepted by a later connection
- Parameters
-
[in] socket Handle referencing the socket
Definition at line 419 of file tcp_timer.c.
◆ tcpTick()
| void tcpTick | ( | void | ) |
TCP timer handler.
This routine must be periodically called by the TCP/IP stack to handle retransmissions and TCP related timers (persist timer, FIN-WAIT-2 timer and TIME-WAIT timer)
Definition at line 56 of file tcp_timer.c.