CONFIG_NET_TCP_RETRY_COUNT:

The following formula can be used to determine the time (in ms) that a segment will be be buffered awaiting retransmission: n=NET_TCP_RETRY_COUNT ∑((1<<n) * 200) n=0 With the default value of 9, the IP stack will try to retransmit for up to 1:42 minutes. This is as close as possible to the minimum value recommended by RFC1122 (1:40 minutes). Only 5 bits are dedicated for the retransmission count, so accepted values are in the 0-31 range. It’s highly recommended to not go below 9, though. Should a retransmission timeout occur, the receive callback is called with -ECONNRESET error code and the context is dereferenced.

Symbol:

NET_TCP_RETRY_COUNT

Type:

int

Value:

“”

User value:

(no user value)

Visibility:

“n”

Is choice item:

false

Is defined:

true

Is from env.:

false

Is special:

false

Prompts:

• “Maximum number of TCP segment retransmissions” if NET_TCP (value: “n”)

Default values:

• 9 (value: “n”)
• Condition: NET_TCP (value: “n”)

Selects:

(no selects)

Reverse (select-related) dependencies:  

(no reverse dependencies)

Additional dependencies from enclosing menus and ifs:  

NETWORKING && NETWORKING && !NET_L2_RAW_CHANNEL (value: “n”)

Locations:

• ../subsys/net/ip/Kconfig:142