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Lwip:add TCP Fin2 timeout configuration

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xueyunfei
2022-08-31 17:28:17 +08:00
parent 9948de101d
commit cd58bad218
4 changed files with 14 additions and 2 deletions
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8
components/lwip/Kconfig
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@ -481,7 +481,13 @@ menu "LWIP"
int "Maximum segment lifetime (MSL)"
default 60000
help
Set maximum segment lifetime in in milliseconds.
Set maximum segment lifetime in milliseconds.
config LWIP_TCP_FIN_WAIT_TIMEOUT
int "Maximum FIN segment lifetime"
default 20000
help
Set maximum segment lifetime in milliseconds.
config LWIP_TCP_SND_BUF_DEFAULT
int "Default send buffer size"

2
components/lwip/lwip

Submodule components/lwip/lwip updated: 316cfc17ce...9bad641bc7

5
components/lwip/port/esp32/include/lwipopts.h
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@ -578,6 +578,11 @@ static inline uint32_t timeout_from_offered(uint32_t lease, uint32_t min)
*/
#define TCP_MSL CONFIG_LWIP_TCP_MSL
/**
* TCP_FIN_WAIT_TIMEOUT: The maximum FIN segment lifetime in milliseconds
*/
#define TCP_FIN_WAIT_TIMEOUT CONFIG_LWIP_TCP_FIN_WAIT_TIMEOUT
/**
* LWIP_WND_SCALE and TCP_RCV_SCALE:
* Set LWIP_WND_SCALE to 1 to enable window scaling.

1
docs/en/api-guides/lwip.rst
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@ -448,6 +448,7 @@ Most lwIP RAM usage is on-demand, as RAM is allocated from the heap as needed. T
- Reducing :ref:`CONFIG_LWIP_MAX_SOCKETS` reduces the maximum number of sockets in the system. This will also cause TCP sockets in the ``WAIT_CLOSE`` state to be closed and recycled more rapidly (if needed to open a new socket), further reducing peak RAM usage.
- Reducing :ref:`CONFIG_LWIP_TCPIP_RECVMBOX_SIZE`, :ref:`CONFIG_LWIP_TCP_RECVMBOX_SIZE` and :ref:`CONFIG_LWIP_UDP_RECVMBOX_SIZE` reduce memory usage at the expense of throughput, depending on usage.
- Reducing :ref:`CONFIG_LWIP_TCP_MSL`, :ref:`CONFIG_LWIP_TCP_FIN_WAIT_TIMEOUT` reduces the maximum segment lifetime in the system. This will also cause TCP sockets in the ``TIME_WAIT``, ``FIN_WAIT_2`` state to be closed and recycled more rapidly
- Disable :ref:`CONFIG_LWIP_IPV6` can save about 39 KB for firmware size and 2KB RAM when system power up and 7KB RAM when TCPIP stack running. If there is no requirement for supporting IPV6 then it can be disabled to save flash and RAM footprint.
.. only:: SOC_WIFI_SUPPORTED