TCP-IP stack and ICMP checksum offload

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#163 TCP-IP stack and ICMP checksum offload

Milestone: v1.0 (example)

Status: open

Owner: nobody

Labels: None

Priority: 9

Updated: 2018-02-26

Created: 2018-02-08

Creator: Reggie Whoat

Private: No

There's a known bug when using hardware checksum offload on ports that supports it regarding pings.
https://www.freertos.org/FreeRTOS_Support_Forum_Archive/January_2015/freertos_FreeRTOS_UDP_port_to_STM32F429_1906b1e1j.html

Will this be ever fixed? Or is this a feature :)

Discussion

Bryce Hillam - 2018-02-26

This issue affects my port also - a Texas Instruments TM4C129x series, (ARM Cortex-M4F) microcontroller.

Ideally there should be more ipconfig options to control which checksums are supported by the hardware, so that there are never any conflicts between the hardware capabilities and the software's expectations, but at the very least I would settle for the attached modification to FreeRTOS_IP.c: prvProcessICMPEchoRequest(), which sets the checksum field to zero if hardware Tx IP checksums are enabled.

Last edit: Bryce Hillam 2018-02-26

FreeRTOS_IP.patch

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