RTOS: NDK IP socket options

Tool/software: TI-RTOS

Hello,

I am using a socket that sends multicast data.

I wanted to disable the multicast loopback using the setsockopt API

uint loop = 0;
setsockopt(socket, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));

it seems that NDK does not have a definition for the IP_MULTICAST_LOOP.
 
is this option supported by NDK and it is just the definition that is missing? if so can you please let me know what is this option's "number" so i can use it?

Thanks
Guy