/**

  * GMyth Library

  *

  * @file gmyth/gmyth_file_transfer.c

  * 

  * @brief <p> GMythFileTransfer deals with the file streaming media remote/local

  * transfering to the MythTV frontend.

  *

  * Copyright (C) 2006 INdT - Instituto Nokia de Tecnologia.

  * @author Rosfran Lins Borges <rosfran.borges@indt.org.br>

  *

           *//*

        * 

        * This program is free software; you can redistribute it and/or modify

        * it under the terms of the GNU Lesser General Public License as published by

        * the Free Software Foundation; either version 2 of the License, or

        * (at your option) any later version.

        *

        * This program is distributed in the hope that it will be useful,

        * but WITHOUT ANY WARRANTY; without even the implied warranty of

        * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

        * GNU General Public License for more details.

        *

        * You should have received a copy of the GNU Lesser General Public License

        * along with this program; if not, write to the Free Software

        * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

        *

        * GStreamer MythTV plug-in properties:

        * - location (backend server hostname/URL) [ex.: myth://192.168.1.73:28722/1000_1092091.nuv]

        * - path (qurl - remote file to be opened)

        * - port number *   

        */

 #ifdef HAVE_CONFIG_H

 #include "config.h"

 #endif

 #include "gmyth_file_transfer.h"

 #include "gmyth_recorder.h"

 #include "gmyth_util.h"

 #include "gmyth_socket.h"

 #include "gmyth_stringlist.h"

 #include "gmyth_debug.h"

 #include "gmyth_uri.h"

 #include "gmyth_marshal.h"

 #include <unistd.h>

 #include <glib.h>

 #include <arpa/inet.h>

 #include <sys/types.h>

 #include <sys/socket.h>

 #include <netdb.h>

 #include <errno.h>

 #include <stdlib.h>

 #include <assert.h>

 #define GMYTHTV_QUERY_HEADER		"QUERY_FILETRANSFER "

 #define GMYTH_FILE_TRANSFER_GET_PRIVATE(obj) \

     (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GMYTH_FILE_TRANSFER_TYPE, GMythFileTransferPrivate))

 enum myth_sock_types

     {

         GMYTH_PLAYBACK_TYPE = 0,

         GMYTH_MONITOR_TYPE,

         GMYTH_FILETRANSFER_TYPE,

         GMYTH_RINGBUFFER_TYPE

     };

 struct _GMythFileTransferPrivate

     {

         GMythRecorder *recorder;

         gboolean do_next_program_chain;

         gboolean disposed;

         gboolean livetv_wait;

         /* MythTV version number */

         gint mythtv_version;

         /* socket descriptors */

         GMythSocket *control_sock;

         GMythSocket *sock;

         GMutex *mutex;

         gint file_id;

     };

 static void gmyth_file_transfer_class_init (GMythFileTransferClass * klass);

 static void gmyth_file_transfer_init (GMythFileTransfer * object);

 static void gmyth_file_transfer_dispose (GObject * object);

 static void gmyth_file_transfer_finalize (GObject * object);

 static void _file_transfer_program_info_changed (GMythFileTransfer * transfer,

                                                  gint msg_code,

                                                  gpointer livetv_recorder);

 static gboolean _connect_to_backend (GMythFileTransfer * transfer);

 static gboolean _control_acquire_context (GMythFileTransfer * transfer,

                                           gboolean do_wait);

 static gboolean _control_release_context (GMythFileTransfer * transfer);

 G_DEFINE_TYPE (GMythFileTransfer, gmyth_file_transfer, GMYTH_FILE_TYPE)

      static void gmyth_file_transfer_class_init (GMythFileTransferClass * klass)

 {

     GObjectClass *gobject_class;

     GMythFileTransferClass *gtransfer_class;

     gobject_class = (GObjectClass *) klass;

     gtransfer_class = (GMythFileTransferClass *) gobject_class;

     gobject_class->dispose = gmyth_file_transfer_dispose;

     gobject_class->finalize = gmyth_file_transfer_finalize;

     g_type_class_add_private (gobject_class, sizeof (GMythFileTransferPrivate));

     gtransfer_class->program_info_changed_handler =

         _file_transfer_program_info_changed;

     gtransfer_class->program_info_changed_handler_signal_id =

         g_signal_new ("program-info-changed",

                       G_TYPE_FROM_CLASS (gtransfer_class),

                       G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE |

                       G_SIGNAL_NO_HOOKS, 0, NULL, NULL,

                       gmyth_marshal_VOID__INT_POINTER, G_TYPE_NONE, 2,

                       G_TYPE_INT, G_TYPE_POINTER);

 }

 static void

 gmyth_file_transfer_init (GMythFileTransfer * transfer)

 {

     g_return_if_fail (transfer != NULL);

     transfer->priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     transfer->priv->mutex = g_mutex_new ();

     g_signal_connect (G_OBJECT (transfer), "program-info-changed",

                       (GCallback) (GMYTH_FILE_TRANSFER_GET_CLASS (transfer)->

                                    program_info_changed_handler), NULL);

 }

 static void

 gmyth_file_transfer_dispose (GObject * object)

 {

     GMythFileTransferPrivate *priv;

     GMythFileTransfer *transfer = GMYTH_FILE_TRANSFER (object);

     g_return_if_fail (transfer != NULL);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     if (priv->disposed)

     {

         /* If dispose did already run, return. */

         return;

     }

     /* Make sure dispose does not run twice. */

     priv->disposed = TRUE;

     if (priv->mutex != NULL)

     {

         g_mutex_free (priv->mutex);

         priv->mutex = NULL;

     }

     if (priv->control_sock != NULL)

     {

         g_object_unref (priv->control_sock);

         priv->control_sock = NULL;

     }

     if (priv->sock != NULL)

     {

         g_object_unref (priv->sock);

         priv->sock = NULL;

     }

     if (priv->recorder != NULL)

     {

         g_object_unref (priv->recorder);

         priv->recorder = NULL;

     }

     G_OBJECT_CLASS (gmyth_file_transfer_parent_class)->dispose (object);

 }

 static void

 gmyth_file_transfer_finalize (GObject * object)

 {

     g_signal_handlers_destroy (object);

     G_OBJECT_CLASS (gmyth_file_transfer_parent_class)->finalize (object);

 }

 /** 

  * Creates a new instance of GMythFileTransfer.

  * 

  * @param backend_info The BackendInfo instance, with all the MythTV network 

  * 										 configuration data.

  * 

  * @return a new instance of the File Transfer. 

  */

 GMythFileTransfer *

 gmyth_file_transfer_new (GMythBackendInfo * backend_info)

 {

     GMythFileTransfer *transfer = g_object_new (GMYTH_FILE_TRANSFER_TYPE,

                                                 "backend-info", backend_info,

                                                 NULL);

     //GValue val = {0,};    

     //backend_info = g_object_ref( backend_info );

     gmyth_debug ("Creating FileTransfer BackendInfo hostname = %s",

                  gmyth_backend_info_get_hostname (backend_info));

     //GMythBackendInfo *backend_info = gmyth_backend_info_new_with_uri (uri_str);

     //g_value_init (&val, G_TYPE_OBJECT);

     //g_value_set_object (&val, backend_info);    

     //g_object_set (G_OBJECT (transfer), "backend-info", &val, NULL);

     return transfer;

 }

 gchar *

 gmyth_file_transfer_get_file_name (GMythFileTransfer * transfer)

 {

     gchar *filename;

     g_object_get (G_OBJECT (transfer), "filename", &filename, NULL);

     return filename;

 }

 /** 

  * Creates a new instance of GMythFileTransfer.

  * 

  * @param uri_str The URI poiting to the MythTV backend server.

  * 

  * @return a new instance of the File Transfer. 

  */

 GMythFileTransfer *

 gmyth_file_transfer_new_with_uri (const gchar * uri_str)

 {

     GMythFileTransfer *transfer =

         GMYTH_FILE_TRANSFER (g_object_new (GMYTH_FILE_TRANSFER_TYPE, NULL));

     gmyth_debug ("URI str = %s", uri_str);

     //GMythBackendInfo *backend_info = gmyth_backend_info_new_with_uri (uri_str);

     GValue val = { 0, };

     g_value_init (&val, G_TYPE_OBJECT);

     g_value_set_object (&val, gmyth_backend_info_new_with_uri (uri_str));

     g_object_set (G_OBJECT (transfer), "backend-info", &val, NULL);

     return transfer;

 }

 /** 

  * Open a File Transfer connection in order to get a remote file.

  * 

  * @param transfer The actual File Transfer instance. 

  * @param filename The file name of the remote file to be transferred to the client.

  * 

  * @return <code>true</code>, if the connection opening had been done successfully. 

  */

 gboolean

 gmyth_file_transfer_open (GMythFileTransfer * transfer, const gchar * filename)

 {

     gboolean ret = TRUE;

     GMythFileTransferPrivate *priv;

     g_return_val_if_fail (transfer != NULL, FALSE);

     g_return_val_if_fail (filename != NULL && strlen (filename) > 0, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     gmyth_debug ("Opening the FileTransfer... (%s)", filename);

     g_object_set (GMYTH_FILE (transfer), "filename", filename, NULL);

     /* configure the control socket */

     if (TRUE/*priv->control_sock == NULL*/)

     {

         if (!_connect_to_backend (transfer))

         {

             gmyth_debug ("Connection to backend failed (Control Socket).");

             ret = FALSE;

         }

 	if (priv->do_next_program_chain) {

             priv->do_next_program_chain = FALSE; // fixme

 	    gmyth_debug ("New file available before the current file was opened");

             GMythProgramInfo *prog_info =

                 gmyth_recorder_get_current_program_info (priv->recorder);

             if (prog_info != NULL && prog_info->pathname != NULL

                 && strlen (prog_info->pathname->str) > 0

                 && g_ascii_strcasecmp (prog_info->pathname->str,

                                        gmyth_file_get_file_name (GMYTH_FILE

                                                                  (transfer))) !=

                 0)

                 ret =

                     gmyth_file_transfer_open (transfer,

                                               g_strrstr (prog_info->pathname->

                                                          str, "/"));

             if (prog_info != NULL)

                 g_object_unref (prog_info);

             if (!ret)

                 gmyth_debug ("Cannot change to the next program info!");

             else

                 gmyth_debug ("OK!!! MOVED to the next program info [%s]!",

                              gmyth_file_get_file_name (GMYTH_FILE (transfer)));

 	} else {

 	    gmyth_debug ("XXXXXXXXXXXXXX Oulu tests XXXXXXXXXXXXXXXX");

 	    gmyth_debug ("None new file found. We continue with the same file opened before");

 	}

     }

     else

     {

         gmyth_debug ("Remote transfer control socket already created.");

     }

     gmyth_debug ("Got file with size = %lld.\n",

                  gmyth_file_get_filesize (GMYTH_FILE (transfer)));

     return ret;

 }

 /** 

  * Connect a File Transfer binary client socket to a remote file.

  * 

  * @param transfer The actual File Transfer instance. 

  * 

  * @return <code>true</code>, if the connection had been configured successfully. 

  */

 static gboolean

 _connect_to_backend (GMythFileTransfer * transfer)

 {

     GString *base_str = NULL;

     GString *hostname = NULL;

     GMythStringList *strlist = NULL;

     gboolean ret = TRUE;

     GMythFileTransferPrivate *priv;

     GMythBackendInfo *backend_info;

     g_return_val_if_fail (transfer != NULL, FALSE);

     g_object_get (GMYTH_FILE (transfer), "backend-info", &backend_info, NULL);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     _control_acquire_context (transfer, TRUE);

     /* Creates the control socket */

     if (priv->control_sock != NULL)

     {

         g_object_unref (priv->control_sock);

         priv->control_sock = NULL;

     }

     base_str = g_string_new ("");

     priv->control_sock = gmyth_socket_new ();

     // Connects the socket, send Mythtv ANN command and verify Mythtv protocol version 

     if (!gmyth_socket_connect_to_backend (priv->control_sock,

                                           backend_info->hostname,

                                           backend_info->port, TRUE))

     {

         g_object_unref (priv->control_sock);

         priv->control_sock = NULL;

         return FALSE;

     }

     /* Creates the data socket */

     if (priv->sock != NULL)

     {

         g_object_unref (priv->sock);

         priv->sock = NULL;

     }

     priv->sock = gmyth_socket_new ();

     gmyth_socket_connect (priv->sock, backend_info->hostname,

                           backend_info->port);

     gmyth_debug ("Connecting file transfer... (%s, %d)", backend_info->hostname,

                  backend_info->port);

     strlist = gmyth_string_list_new ();

     hostname = gmyth_socket_get_local_hostname ();

     gmyth_debug ("[%s] MythTV version (from backend) = %d.\n", __FUNCTION__,

                  priv->control_sock->mythtv_version);

     if (priv->control_sock->mythtv_version > 26)

         g_string_printf (base_str, "ANN FileTransfer %s 1 -1", hostname->str);

     else

         g_string_printf (base_str, "ANN FileTransfer %s", hostname->str);

     gmyth_string_list_append_string (strlist, base_str);

     gmyth_string_list_append_char_array (strlist,

                                          gmyth_file_get_file_name (GMYTH_FILE

                                                                    (transfer)));

     gmyth_socket_write_stringlist (priv->sock, strlist);

     /* MONITOR Handler - DVB TV Chain update messages!!! */

     gmyth_socket_read_stringlist (priv->sock, strlist);

     /* file identification used in future file transfer requests to backend */

     priv->file_id = gmyth_string_list_get_int (strlist, 1);

     /* Myth URI stream file size - decoded using two 8-bytes sequences (64 bits/long long types) */

     gmyth_file_set_filesize (GMYTH_FILE (transfer),

                              gmyth_string_list_get_int64 (strlist, 2));

     gmyth_debug ("***** Received: recordernum = %d, filesize = %"

                  G_GUINT64_FORMAT "\n", priv->file_id,

                  gmyth_file_get_filesize (GMYTH_FILE (transfer)));

     if (gmyth_file_get_filesize (GMYTH_FILE (transfer)) < 0)

     {

         gmyth_debug

             ("Got filesize equals to %llu is lesser than 0 [invalid stream file]\n",

              gmyth_file_get_filesize (GMYTH_FILE (transfer)));

         g_object_unref (priv->sock);

         priv->sock = NULL;

         ret = FALSE;

     }

     _control_release_context (transfer);

     if (strlist != NULL)

         g_object_unref (strlist);

     if (base_str != NULL)

         g_string_free (base_str, TRUE);

     if (hostname != NULL)

         g_string_free (hostname, TRUE);

     return ret;

 }

 /** 

  * Receives a GObject signal coming from a LiveTV instance, all the time a 

  * program info changes.

  * 

  * @param transfer The actual File Transfer instance. 

  * @param msg_code The MythTV backend message status code.

  * @param live_tv A pointer to the LiveTV instance. * 

  */

 void

 gmyth_file_transfer_emit_program_info_changed_signal (GMythFileTransfer *

                                                       transfer, gint msg_code,

                                                       gpointer live_tv_recorder)

 {

     gmyth_debug ("Calling signal handler... [FILE_TRANSFER]");

     g_signal_emit (transfer, GMYTH_FILE_TRANSFER_GET_CLASS (transfer)->program_info_changed_handler_signal_id, 0,       /* details */

                    msg_code, live_tv_recorder);

 }

 /** 

  * Checks if the actual File Transfer connection is open.

  * 

  * @param transfer The actual File Transfer instance. 

  * 

  * @return <code>true</code>, if the File Transfer connection is opened. 

  */

 gboolean

 gmyth_file_transfer_is_open (GMythFileTransfer * transfer)

 {

     GMythStringList *strlist;

     GMythFileTransferPrivate *priv;

     GString *query;

     g_return_val_if_fail (transfer != NULL, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_return_val_if_fail (priv->control_sock != NULL, FALSE);

     g_return_val_if_fail (priv->sock != NULL, FALSE);

     _control_acquire_context (transfer, TRUE);

     strlist = gmyth_string_list_new ();

     query = g_string_new (GMYTHTV_QUERY_HEADER);

     g_string_append_printf (query, "%d", priv->file_id);

     gmyth_string_list_append_string (strlist, query);

     gmyth_string_list_append_char_array (strlist, "IS_OPEN");

     gmyth_socket_write_stringlist (priv->control_sock, strlist);

     gmyth_socket_read_stringlist (priv->control_sock, strlist);

     _control_release_context (transfer);

     g_string_free (query, TRUE);

     g_object_unref (strlist);

     return (strlist != NULL && gmyth_string_list_get_int (strlist, 0) == 1);

 }

 /** 

  * Closes a remote File Transfer connection.

  * 

  * @param transfer The actual File Transfer instance. 

  */

 void

 gmyth_file_transfer_close (GMythFileTransfer * transfer)

 {

     GMythStringList *strlist;

     GMythFileTransferPrivate *priv;

     GString *query;

     g_return_if_fail (transfer != NULL);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     if (priv->control_sock == NULL)

         return;

     _control_acquire_context (transfer, TRUE);

     strlist = gmyth_string_list_new ();

     query = g_string_new (GMYTHTV_QUERY_HEADER);

     g_string_append_printf (query, "%d", priv->file_id);

     gmyth_string_list_append_string (strlist, query);

     gmyth_string_list_append_char_array (strlist, "DONE");

     if (gmyth_socket_sendreceive_stringlist (priv->control_sock, strlist) <= 0)

     {

         // fixme: time out???

         gmyth_debug ("Remote file timeout.\n");

     }

     g_string_free (query, TRUE);

     g_object_unref (strlist);

     if (priv->sock)

     {

         g_object_unref (priv->sock);

         priv->sock = NULL;

     }

     if (priv->control_sock)

     {

         g_object_unref (priv->control_sock);

         priv->control_sock = NULL;

     }

     _control_release_context (transfer);

 }

 /** 

  * Do a seek operation (moves the read/write file pointer) on a remote file.

  * 

  * @param transfer The actual File Transfer instance. 

  * @param pos The position to be moved in the remote file.

  * @param whence Tells to what direction seek movement should be done.

  * 

  * @return The actual position on the remote file (after seek has been done). 

  */

 gint64

 gmyth_file_transfer_seek (GMythFileTransfer * transfer, guint64 pos,

                           gint whence)

 {

     GMythStringList *strlist = gmyth_string_list_new ();

     GMythFileTransferPrivate *priv;

     GString *query;

     g_return_val_if_fail (transfer != NULL, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_return_val_if_fail (priv->sock != NULL, -1);

     g_return_val_if_fail (priv->control_sock != NULL, -1);

     strlist = gmyth_string_list_new ();

     query = g_string_new (GMYTHTV_QUERY_HEADER);

     g_string_append_printf (query, "%d", priv->file_id);

     /* myth_control_acquire_context( transfer, TRUE ); */

     gmyth_string_list_append_string (strlist, query);

     gmyth_string_list_append_char_array (strlist, "SEEK");

     gmyth_string_list_append_uint64 (strlist, pos);

     gmyth_string_list_append_int (strlist, whence);

     if (pos > 0)

         gmyth_string_list_append_uint64 (strlist, pos);

     else

         gmyth_string_list_append_uint64 (strlist,

                                          gmyth_file_get_offset (GMYTH_FILE

                                                                 (transfer)));

     gmyth_socket_sendreceive_stringlist (priv->control_sock, strlist);

     gint64 retval = gmyth_string_list_get_int64 (strlist, 0);

     gmyth_file_set_offset (GMYTH_FILE (transfer), retval);

     gmyth_debug ("Got reading position pointer from the streaming = %lld\n",

                  retval);

     g_object_unref (strlist);

     g_string_free (query, TRUE);

     /* myth_control_release_context( transfer ); */

     return retval;

 }

 /** 

  * Acquire access to a remote file socket read/write pointer.

  * 

  * @param transfer The actual File Transfer instance.

  * @param do_wait Waits or not on a GCond, when trying to read from the remote socket.

  * 

  * @return <code>true</code>, if the acquire had been got. 

  */

 static gboolean

 _control_acquire_context (GMythFileTransfer * transfer, gboolean do_wait)

 {

     gboolean ret = TRUE;

     GMythFileTransferPrivate *priv;

     g_return_val_if_fail (transfer != NULL, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_mutex_lock (priv->mutex);

     return ret;

 }

 /** 

  * Release access to a remote file socket read/write pointer.

  * 

  * @param transfer The actual File Transfer instance.

  * 

  * @return <code>true</code>, if the socket read/write permissions had been releaseds. 

  */

 static gboolean

 _control_release_context (GMythFileTransfer * transfer)

 {

     gboolean ret = TRUE;

     GMythFileTransferPrivate *priv;

     g_return_val_if_fail (transfer != NULL, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_mutex_unlock (priv->mutex);

     return ret;

 }

 /** 

  * Reads a block from a remote file.

  * 

  * @param transfer The actual File Transfer instance.

  * @param data A GByteArray instance, where all the binary data representing 

  * 						 the remote file will be stored.

  * @param size The block size, in bytes, to be requested from a remote file.

  * @param read_unlimited Tells the backend to read indefinitely (LiveTV), or only 

  * 											 gets the actual size

  * 

  * @return The actual block size (in bytes) returned by REQUEST_BLOCK message,

  * 				or the error code. 

  */

 GMythFileReadResult

 gmyth_file_transfer_read (GMythFileTransfer * transfer, GByteArray * data,

                           gint size, gboolean read_unlimited)

 {

     gint bytes_sent = 0;

     gsize bytes_read = 0;

     gint64 total_read = 0;

     GMythFileReadResult retval = GMYTH_FILE_READ_OK;

     GMythFileTransferPrivate *priv;

     GError *error = NULL;

     GIOChannel *io_channel;

     GIOChannel *io_channel_control;

     GIOCondition io_cond;

     GIOCondition io_cond_control;

     GIOStatus io_status = G_IO_STATUS_NORMAL;

     GIOStatus io_status_control = G_IO_STATUS_NORMAL;

     GMythStringList *strlist;

     GMythStringList *ret_strlist = NULL;

     gboolean ret = TRUE;

     GString *query;

     g_return_val_if_fail (transfer != NULL, FALSE);

     g_return_val_if_fail (data != NULL, GMYTH_FILE_READ_ERROR);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     strlist = gmyth_string_list_new ();

     io_channel = priv->sock->sd_io_ch;

     io_channel_control = priv->control_sock->sd_io_ch;

     io_status = g_io_channel_set_encoding (io_channel, NULL, &error);

     if (io_status == G_IO_STATUS_NORMAL)

         gmyth_debug ("[%s] Setting encoding to binary data socket).\n",

                      __FUNCTION__);

     io_cond = g_io_channel_get_buffer_condition (io_channel);

     io_cond_control = g_io_channel_get_buffer_condition (io_channel);

     if (priv->sock == NULL || (io_status == G_IO_STATUS_ERROR))

     {

         g_printerr ("gmyth_file_transfer_read(): Called with no raw socket.\n");

         return GMYTH_FILE_READ_ERROR;

     }

     if (priv->control_sock == NULL || (io_status_control == G_IO_STATUS_ERROR))

     {

         g_printerr

             ("gmyth_file_transfer_read(): Called with no control socket.\n");

         return GMYTH_FILE_READ_ERROR;

     }

     query = g_string_new (GMYTHTV_QUERY_HEADER);

     g_string_append_printf (query, "%d", priv->file_id);

     gmyth_debug ("[%s] Transfer_query = %s\n", __FUNCTION__, query->str);

     _control_acquire_context (transfer, TRUE);

     //Do Read

     gmyth_string_list_append_char_array (strlist, query->str);

     gmyth_string_list_append_char_array (strlist, "REQUEST_BLOCK");

     gmyth_string_list_append_int (strlist, size - total_read);

     /* 200??? Is this a TV or a HQ data traffic? */

     guint iter_count = 4;

     do

     {

         bytes_sent = 0;

         // Request the block to the backend

         gmyth_socket_write_stringlist (priv->control_sock, strlist);

         if (ret_strlist != NULL)

             g_object_unref (ret_strlist);

         ret_strlist = gmyth_string_list_new ();

         // Receives the backand answer    

         gmyth_socket_read_stringlist (priv->control_sock, ret_strlist);

         if (ret_strlist != NULL && gmyth_string_list_length (ret_strlist) > 0)

         {

             bytes_sent = gmyth_string_list_get_int (ret_strlist, 0);    // -1 on backend error

             gmyth_debug ("[%s] got SENT buffer message = %d\n", __FUNCTION__,

                          bytes_sent);

         }

         if (read_unlimited && (bytes_sent == 0))

         {

             g_usleep (300);

         }

 	--iter_count;

     }

     while (read_unlimited && (bytes_sent == 0) && iter_count > 0);

     if (bytes_sent > 0)

     {

         gchar *data_buffer = g_new0 (gchar, bytes_sent);

         io_status = g_io_channel_read_chars (io_channel,

                                              data_buffer,

                                              (gsize) bytes_sent,

                                              &bytes_read, &error);

         if (io_status != G_IO_STATUS_NORMAL)

         {

             gmyth_debug ("Error on io_channel");

             g_free (data_buffer);

             g_object_unref (strlist);

             retval = GMYTH_FILE_READ_ERROR;

             goto error;

         }

         /* append new data to the increasing byte array */

         data =

             g_byte_array_append (data, (const guint8 *) data_buffer,

                                  bytes_read);

         gmyth_file_set_offset (GMYTH_FILE (transfer),

                                gmyth_file_get_offset (GMYTH_FILE (transfer)) +

                                bytes_read);

         if (!read_unlimited

             && (gmyth_file_get_filesize (GMYTH_FILE (transfer)) > 0)

             && (gmyth_file_get_offset (GMYTH_FILE (transfer)) ==

                 gmyth_file_get_filesize (GMYTH_FILE (transfer))))

         {

             retval = GMYTH_FILE_READ_EOF;

             goto error;

         }

         g_free (data_buffer);

     }

     else

     {

         retval = GMYTH_FILE_READ_ERROR;

     }

     if (strlist != NULL)

     {

         g_object_unref (strlist);

         strlist = NULL;

     }

     if (ret_strlist != NULL)

     {

         g_object_unref (ret_strlist);

         ret_strlist = NULL;

     }

     if (read_unlimited && (bytes_sent == 0))

     {

         gmyth_debug ("Trying to move to the next program chain...");

         if (priv->recorder != NULL && priv->do_next_program_chain)

         {

 	    priv->do_next_program_chain = FALSE;

             retval = GMYTH_FILE_READ_NEXT_PROG_CHAIN;

             GMythProgramInfo *prog_info =

                 gmyth_recorder_get_current_program_info (priv->recorder);

             if (prog_info != NULL && prog_info->pathname != NULL

                 && strlen (prog_info->pathname->str) > 0

                 && g_ascii_strcasecmp (prog_info->pathname->str,

                                        gmyth_file_get_file_name (GMYTH_FILE

                                                                  (transfer))) !=

                 0)

                 ret =

                     gmyth_file_transfer_open (transfer,

                                               g_strrstr (prog_info->pathname->

                                                          str, "/"));

             if (prog_info != NULL)

                 g_object_unref (prog_info);

             if (!ret)

                 gmyth_debug ("Cannot change to the next program info!");

             else

                 gmyth_debug ("OK!!! MOVED to the next program info [%s]!",

                              gmyth_file_get_file_name (GMYTH_FILE (transfer)));

         }

     }                           /* if */

   error:

     _control_release_context (transfer);

     g_string_free (query, TRUE);

     if (error != NULL)

     {

         gmyth_debug ("Cleaning-up ERROR: %s [msg = %s, code = %d]\n",

                      __FUNCTION__, error->message, error->code);

         g_error_free (error);

     }

     if (total_read > 0)

         gmyth_file_set_offset (GMYTH_FILE (transfer),

                                gmyth_file_get_offset (GMYTH_FILE (transfer)) +

                                total_read);

     return retval;

 }

 static void

 _file_transfer_program_info_changed (GMythFileTransfer * transfer,

                                      gint msg_code, gpointer livetv_recorder)

 {

     GMythRecorder *recorder;

     GMythFileTransferPrivate *priv;

     g_return_if_fail (transfer != NULL);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     recorder = GMYTH_RECORDER (livetv_recorder);

     gmyth_debug

         ("Program info changed! ( file transfer orig. = %p, ptr. = [%s] )",

          transfer, livetv_recorder != NULL ? "[NOT NULL]" : "[NULL]");

     if (NULL != recorder)

     {

         gmyth_debug

             ("YES, the requested program info movement on the LiveTV transfer is authentical!");

     }

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_object_ref (recorder);

     priv->recorder = recorder;

     priv->do_next_program_chain = TRUE;

 }

 /** 

  * Sets the timeout flag of a file being transfered.

  * 

  * @param transfer The actual File Transfer instance.

  * @param fast If this is <code>true</code>, sets the remote timeout to be as fast

  * 						as possible.

  * 

  * @return <code>true</code>, if the acquire had been got. 

  */

 gboolean

 gmyth_file_transfer_settimeout (GMythFileTransfer * transfer, gboolean fast)

 {

     GMythFileTransferPrivate *priv;

     GMythStringList *strlist = NULL;

     g_return_val_if_fail (transfer != NULL, FALSE);

     priv = GMYTH_FILE_TRANSFER_GET_PRIVATE (transfer);

     g_return_val_if_fail (priv->sock != NULL, FALSE);

     g_return_val_if_fail (priv->control_sock != NULL, FALSE);

     _control_acquire_context (transfer, TRUE);

     strlist = gmyth_string_list_new ();

     gmyth_string_list_append_char_array (strlist, GMYTHTV_QUERY_HEADER);

     gmyth_string_list_append_char_array (strlist, "SET_TIMEOUT");

     gmyth_string_list_append_int (strlist, fast);

     gint strlist_len = gmyth_socket_sendreceive_stringlist (priv->control_sock,

                                                             strlist);

     if (strlist_len > 0)

         gmyth_debug ("Yes, timeout was changed: %s.",

                      gmyth_string_list_get_char_array (strlist, 0));

     else

         gmyth_debug ("Timeout cannot be changed!");

     _control_release_context (transfer);

     gmyth_debug ("%s setting timeout flag of this file transfer = %s\n",

                  strlist_len > 0 ? "Yes," : "NOT", fast ? "FAST" : "NOT FAST");

     g_object_unref (strlist);

     return TRUE;

 }

 /** 

  * Gets the actual file size of the binary content.

  * 

  * @param transfer The actual File Transfer instance.

  * 

  * @return The actual file size in bytes. 

  */

 guint64

 gmyth_file_transfer_get_filesize (GMythFileTransfer * transfer)

 {

     guint64 filesize;

     g_return_val_if_fail (transfer != NULL, 0);

     g_object_get (GMYTH_FILE (transfer), "file-size", &filesize, NULL);

     return filesize;

 }