MCU-PLUS-SDK-AM243X: How to activate TCP keep alive mechanism

Eli Mordel

Expert 1355 points

Part Number: MCU-PLUS-SDK-AM243X

Tool/software:

Hi,

How can I activate the keep alive mechanism on the TCP server example ?

I get no event when TCP client ungracefully disconnects. (Cable unplugged - or client software crashes)

I've tried to use socket options

if (setsockopt(socket, IPPROTO_TCP, TCP_KEEPIDLE, &keepidle, sizeof(keepidle)) < 0) ...

but it always fails.

Thanks,

Eli

over 1 year ago

0 Nitika Verma over 1 year ago

TI__Expert 7385 points

Hi Eli,

I have a few basic questions before we proceed with the functionality discussion.

What SDK version are you using? Are you working with CPSW or ICSSG?

You would like to add TCP keep-alives only to detect broken connections or do you have any other use case for it?

Regards,

Nitika

0 Eli Mordel over 1 year ago in reply to Nitika Verma

Expert 1355 points

Hi Nitika,

I'm using the ind_comms_sdk_am243x_09_01_00_03

Server side of Telnet connection over LwIP- TCP with CPSW.

When the client gracefully disconnects I have an event from receive socket.

When the client disconnects (cable , software stuck..) I have no event.

Thanks,

Regards,

Eli

0 Nitika Verma over 1 year ago in reply to Eli Mordel

TI__Expert 7385 points

Hi Eli,

I understand, let me discuss this with the team internally and get back to you.

Regards,

Nitika

0 Eli Mordel over 1 year ago in reply to Nitika Verma

Expert 1355 points

Thanks Nitika,

Regards,

Eli

0 PRADEEP HN over 1 year ago in reply to Eli Mordel

TI__Intellectual 1711 points

Hi ELi,
Can you use the API - lwip_getsockopt(SO_ERROR). This shall return the error code when the connection fails. Please check the lwip documentation for more details on the error code.

With regards,
Pradeep

Arm-based microcontrollers

Arm-based microcontrollers forum

MCU-PLUS-SDK-AM243X: How to activate TCP keep alive mechanism