Function SetMulticastIf

engine/dlib/src/dlib/socket_posix.cpp:239–268

    }

    Result SetMulticastIf(Socket socket, Address address)
    {
#if defined(__EMSCRIPTEN__)
        return RESULT_AFNOSUPPORT;
#else
        int result = -1;
        if (IsSocketIPv4(socket))
        {
            struct in_addr inaddr;
            memset(&inaddr, 0, sizeof(inaddr));
            inaddr.s_addr = *IPv4(&address);
            result = setsockopt(socket, IPPROTO_IP, IP_MULTICAST_IF, (char *) &inaddr, sizeof(inaddr));
        }
#if !defined(DM_IPV6_UNSUPPORTED)
        else if (IsSocketIPv6(socket))
        {
            struct in6_addr inaddr;
            memcpy(&inaddr, IPv6(&address), sizeof(struct in6_addr));
            result = setsockopt(socket, IPPROTO_IP, IP_MULTICAST_IF, (char *) &inaddr, sizeof(inaddr));
        }
#endif // no ipv6
        else
        {
            dmLogError("Failed to enable multicast interface, unsupported address family!");
            return RESULT_AFNOSUPPORT;
        }

        return result == 0 ? RESULT_OK : NATIVETORESULT(DM_SOCKET_ERRNO);
#endif
    }

    Result Delete(Socket socket)
    {