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linux joining multicast group setsockopt returns errno 19 device not found
int hopLimit = 1;
int bAllowMultiple = 1;
in_addr localAddr;
localAddr.s_addr = 0;

in_addr groupAddress;
groupAddress.s_addr = inet_addr(ADDRESS);

sockaddr_in groupEndPoint;
groupEndPoint.sin_family = AF_INET;
groupEndPoint.sin_addr = groupAddress;
groupEndPoint.sin_port = htons(PORT);

SOCKET udpsocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

if(udpsocket == -1){
    printf("Socket failn%dn", errno);
    return 1;
}

if(setsockopt(udpsocket, IPPROTO_IP, IP_MULTICAST_TTL, (char *)&hopLimit, sizeof(hopLimit))==-1){
    printf("sockopt failed: IP_MULTICAST_TTLn%dn", errno);
    return 1;
}
if(setsockopt(udpsocket, IPPROTO_IP, IP_MULTICAST_IF, (char *)&localAddr, sizeof(localAddr))==-1){
    printf("sockopt failed: IP_MULTICAST_IFn%dn", errno);
    return 1;
}
if(setsockopt(udpsocket, SOL_SOCKET, SO_REUSEADDR, &bAllowMultiple, sizeof(bAllowMultiple))==-1){
    printf("sockopt failed: SO_REUSEADDRn%dn", errno);
    return errno;
}
        // Set to non-blocking mode
unsigned long bMode = 1;
if(ioctl( udpsocket, FIONBIO, &bMode )==-1){
    printf("ioctl failedn%dn", errno);
    return errno;
}
sockaddr_in localEndPoint;
localEndPoint.sin_family = AF_INET;
localEndPoint.sin_addr.s_addr = localAddr.s_addr;
localEndPoint.sin_port = groupEndPoint.sin_port;

        // Bind the socket to the port
int r = bind(udpsocket, (sockaddr*)&localEndPoint, sizeof(localEndPoint));
if (r != 0)
{
    printf("Bind failedn%dn", errno);
    return errno;
}
// Join the multicast group
struct ip_mreq imr;
imr.imr_multiaddr = groupEndPoint.sin_addr;
imr.imr_interface.s_addr = groupEndPoint.sin_addr.s_addr;

r = setsockopt(udpsocket, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr, sizeof(imr));
printf("%dn",r);
if (r == -1){
    printf("sockopt failed: IP_ADD_MEMBERSHIPn%dn", errno);
    return errno;
}