Experiencing system crashes with upd sendto

[Shark7Pepper]

Version nuttx8.2. mtu is set to 1500.When I transfer data using udp protocol, using function sendto() with parameter len set to 4096, the system crashes. I want to know why? Does 8.2 support ip segmentation and how do I configure the system?

[acassis]

@Shark7Pepper did you try to reproduce the issue in a recent NuttX version? If the issue still happening in the mainline we will fix it.

[patacongo]

I don't think NuttX UDP supports transfers > sizeof(MTU)

[xiaoxiang781216]

it's possible now If the new ip fragment is enabled.:)

[fjpanag]

@Shark7Pepper can you please describe the "crash" that you are facing?

This has been discussed here, and it was fixed in #9423. Is this the same issue that you are facing?

Which arch are you using? At least in the STM32 driver there seems to be an issue that can also cause a crash with large datagrams.