PeerStreamer

static int resetup_tcp(AVFormatContext *s)

{

    RTSPState *rt = s->priv_data;

    char host[1024];

    int port;

    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0,

                 s->filename);

    ff_rtsp_undo_setup(s);

    return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP,

                                      rt->real_challenge);

}

retry:

    if (ret < 0) {

        if (ret == FF_NETERROR(ETIMEDOUT) && !rt->packets) {

            if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&

                rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) {

                RTSPMessageHeader reply1, *reply = &reply1;

                av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n");

                if (rtsp_read_pause(s) != 0)

                    return -1;

                // TEARDOWN is required on Real-RTSP, but might make

                // other servers close the connection.

                if (rt->server_type == RTSP_SERVER_REAL)

                    ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL,

                                     reply, NULL);

                rt->session_id[0] = '\0';

                if (resetup_tcp(s) == 0) {

                    rt->state = RTSP_STATE_IDLE;

                    rt->need_subscription = 1;

                    if (rtsp_read_play(s) != 0)

                        return -1;

                    goto retry;

                }

            }

        }

    }

    rt->packets++;