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[lwip-users] multicast and join group issue

From: pcu
Subject: [lwip-users] multicast and join group issue
Date: Sun, 11 May 2014 23:17:40 -0700 (PDT)


I'm working with lwip and freertos on STM32.

I did a task based on sockets which is listening on multicast address.  
It works when I send a multicast message from PC, and my board answer. So
far so good.

But I took a wireshark capture and lwip doesn't send an IGMP join group.
Consequence: packet from PC are sent to the entire network/switch. Then
there is no difference with a broadcast packet from my opinion.

I check in the igmp code and the program pass through the join group (
igmp_send() ) but nothing ontgoing on the network.

I think I'm not so far the solution...

thanks for your ideas,

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