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fix TCP retransmission interval

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ronghulin
2020-10-16 11:47:35 +08:00
committed by liuzhifu
parent d39fc7ca00
commit 9253d41b1a
1 changed files with 11 additions and 2 deletions
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13
components/lwip/Kconfig
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@@ -331,6 +331,13 @@ menu "LWIP"
change the memory usage of LWIP, except for preventing change the memory usage of LWIP, except for preventing
new listening TCP connections after the limit is reached. new listening TCP connections after the limit is reached.
config LWIP_TCP_HIGH_SPEED_RETRANSMISSION
bool "TCP high speed retransmissions"
default y
help
Speed up the TCP retransmission interval. If disabled,
it is recommended to change the number of SYN retransmissions to 6,
TCP timer interval to 250, and TCP rto time to 3000.
config LWIP_TCP_MAXRTX config LWIP_TCP_MAXRTX
int "Maximum number of retransmissions of data segments" int "Maximum number of retransmissions of data segments"
@@ -341,7 +348,8 @@ menu "LWIP"
config LWIP_TCP_SYNMAXRTX config LWIP_TCP_SYNMAXRTX
int "Maximum number of retransmissions of SYN segments" int "Maximum number of retransmissions of SYN segments"
default 6 default 6 if !LWIP_TCP_HIGH_SPEED_RETRANSMISSION
default 12 if LWIP_TCP_HIGH_SPEED_RETRANSMISSION
range 3 12 range 3 12
help help
Set maximum number of retransmissions of SYN segments. Set maximum number of retransmissions of SYN segments.
@@ -475,7 +483,8 @@ menu "LWIP"
config LWIP_TCP_RTO_TIME config LWIP_TCP_RTO_TIME
int "Default TCP rto time" int "Default TCP rto time"
default 3000 default 3000 if !LWIP_TCP_HIGH_SPEED_RETRANSMISSION
default 1500 if LWIP_TCP_HIGH_SPEED_RETRANSMISSION
help help
Set default TCP rto time for a reasonable initial rto. Set default TCP rto time for a reasonable initial rto.
In bad network environment, recommend set value of rto time to 1500. In bad network environment, recommend set value of rto time to 1500.