ipv6 multicast on NET+OS 7.5 / Connect Me 9210

Embedded Devices NET+OS
,
1

Support the NET+OS Version 7.5.2.2
multicast for ipv6?

I try this multicast send example,
the return value from sendto(…) ist always -1.

Thanks for any suggestions.

struct	addrinfo hint, * info;

    memset( &hint, 0, sizeof( hint ) );

    hint.ai_family = AF_INET6;
    hint.ai_socktype = SOCK_DGRAM;
    hint.ai_protocol = IPPROTO_UDP;
    hint.ai_flags |= AI_NUMERICHOST;

    int err = getaddrinfo( "ff08::1", NULL, &hint, &info );

    if( err != 0 ) {
        perror( "getaddrinfo" );
        return 0;
    }

    struct sockaddr_in6 * ipv6_addr = (struct sockaddr_in6*)info->ai_addr;
    ipv6_addr->sin6_port = htons( 65535 );
    ipv6_addr->sin6_scope_id = 8; //same result with 0
    s = socket( AF_INET6, SOCK_DGRAM, 0 );

    int multicastTTL = 1;
if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 
        &multicastTTL, sizeof(multicastTTL)) < 0) 
    {
	  perror("setsockopt failed");
	  exit( 1 );
}

    for( ; ; ) {
        char data[6];
        int e_nr;

        scanf( "%5s", data );
        data[5] = '\0';
        printf( "Sending %s

", data );
if( (e_nr = sendto( s, data, 5, 0, info->ai_addr, info->ai_addrlen )) != 5 ) {
printf( "Error sending %d
", e_nr);
}

        if( strcmp( data, "exitt" ) == 0 ) {
            break;
        }
    }

    close( s );
2

what address are you sending to? TCP? UDP?
have you tried something along those lines:
https://cboard.cprogramming.com/networking-device-communication/67469-ipv6-multicast-example-code.html
?

3

With this example i have the same result.
Now i wait for our new ipv6 network.
Thanks for the suggestion.