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TAlex.11
TAlex.11
Visitor II
December 3, 2018
Question

can't create RAW SOCKET FeeRTOS+LWIP

  • December 3, 2018
  • 5 replies
  • 2534 views

I'm trying to create a project on the Nucleo-STM32H743ZI, in which I want to implement the ICMP protocol on remote hosts. I took the example of LWIP contrib-2.0.1. The problem is that when creating a RAW SOCKET, it always returns -1.

 socket = lwip_socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);

In this case, if you create a SOCK_DGRAM or SOCK_STREAM, then everything is successfully created.

What am I doing wrong?

This topic has been closed for replies.

5 replies

Hoang_Tran
Hoang_Tran
Associate III
May 14, 2019

I have a similar situation!

Ivan Pletnev
Ivan Pletnev
Associate II
December 26, 2019

I have a same problem. TAlex.1, did you find some solution?

Anonymous
December 26, 2019

You need to rebuild LWIP with LWIP_RAW defined in lwipopts.h in order to include RAW socket support. It seems it is not defined by default.

Regards,

Alexander

Ivan Pletnev
Ivan Pletnev
Associate II
December 26, 2019

LWIP_RAW is defined in my code. It's looks like thread freezing, diagnostic messages and Socket Debug messages are not displaying in this case. Howewer, if type of socket are SOCK_DGRAM or SOCK_STREAM, everything is OK

if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
		puts("PING socket error");
		return;
	}
	printf("Socket No %u created\r\n", s);

Piranha
Piranha
Principal III
December 28, 2019

You can't expect higher layers and APIs (especially thread-safe ones) to work, while lower layers are flawed and blatantly violating multithreading and other requirements.

https://community.st.com/s/question/0D50X0000BOtfhnSQB/how-to-make-ethernet-and-lwip-working-on-stm32

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