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Altera_Forum's avatar
Altera_Forum
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17 years ago

how to use multicast with Interniche

I am having problem of enabling multicast functionalitiy in the nichestack. Interniche website seems to claim it supports multicast I went in th ipport.h and moved IP_MULTICAST defin...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi

I am now able to set IP_MULTICAST_IF and IP_ADD_MEMBERSHIP options.

It was a socket programming error:

considere the following code : 

 struct in_addr local_addr;
   IP4_ADDR(local_address.s_addr,192,168,1,2);
    
    if((setsockopt (sock, IPPROTO_IP,    IP_MULTICAST_IF,&local_addr,sizeof(local_addr)))<0)
    {
    fprintf(stderr,"multicast_if failed\n");}

But sendto always returns an error.

Any idea?

Thanks.

Mikael.