static void start_multicast(void)
{
    FFServerStream *stream;
    char session_id[32];
    HTTPContext *rtp_c;
    struct sockaddr_in dest_addr = {0};
    int default_port, stream_index;
    unsigned int random0, random1;

    default_port = 6000;
    for(stream = config.first_stream; stream; stream = stream->next) {

        if (!stream->is_multicast)
            continue;

        random0 = av_lfg_get(&random_state);
        random1 = av_lfg_get(&random_state);

        /* open the RTP connection */
        snprintf(session_id, sizeof(session_id), "%08x%08x", random0, random1);

        /* choose a port if none given */
        if (stream->multicast_port == 0) {
            stream->multicast_port = default_port;
            default_port += 100;
        }

        dest_addr.sin_family = AF_INET;
        dest_addr.sin_addr = stream->multicast_ip;
        dest_addr.sin_port = htons(stream->multicast_port);

        rtp_c = rtp_new_connection(&dest_addr, stream, session_id,
                                   RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
        if (!rtp_c)
            continue;

        if (open_input_stream(rtp_c, "") < 0) {
            http_log("Could not open input stream for stream '%s'\n",
                     stream->filename);
            continue;
        }

        /* open each RTP stream */
        for(stream_index = 0; stream_index < stream->nb_streams;
            stream_index++) {
            dest_addr.sin_port = htons(stream->multicast_port +
                                       2 * stream_index);
            if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, NULL) >= 0)
                continue;

            http_log("Could not open output stream '%s/streamid=%d'\n",
                     stream->filename, stream_index);
            exit(1);
        }

        rtp_c->state = HTTPSTATE_SEND_DATA;
    }
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.