/* GStreamer

 * Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>

 *

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

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

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

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

/*

 * Unless otherwise indicated, Source Code is licensed under MIT license.

 * See further explanation attached in License Statement (distributed in the file

 * LICENSE).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy of

 * this software and associated documentation files (the "Software"), to deal in

 * the Software without restriction, including without limitation the rights to

 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is furnished to do

 * so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in all

 * copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

/**

 * SECTION:gstrtspurl

 * @short_description: handling RTSP urls

 *  

 * <refsect2>

 * <para>

 * Provides helper functions to handle RTSP urls.

 * </para>

 * </refsect2>

 *  

 * Last reviewed on 2007-07-25 (0.10.14)

 */

#include <stdlib.h>

#include <string.h>

#include "gstrtspurl.h"

#define RTSP_PROTO      "rtsp://"

#define RTSP_PROTO_LEN  7

#define RTSPU_PROTO     "rtspu://"

#define RTSPU_PROTO_LEN 8

#define RTSPT_PROTO     "rtspt://"

#define RTSPT_PROTO_LEN 8

/* format is rtsp[u]://[user:passwd@]host[:port]/abspath[?query] */

/**

 * gst_rtsp_url_parse:

 * @urlstr: the url string to parse

 * @url: location to hold the result.

 *

 * Parse the RTSP @urlstr into a newly allocated #GstRTSPUrl. Free after usage

 * with gst_rtsp_url_free().

 *

 * Returns: a #GstRTSPResult.

 */

GstRTSPResult

gst_rtsp_url_parse (const gchar * urlstr, GstRTSPUrl ** url)

{

  GstRTSPUrl *res;

  gchar *p, *delim, *at, *col;

  g_return_val_if_fail (urlstr != NULL, GST_RTSP_EINVAL);

  g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);

  res = g_new0 (GstRTSPUrl, 1);

  p = (gchar *) urlstr;

  if (g_str_has_prefix (p, RTSP_PROTO)) {

    res->transports =

        GST_RTSP_LOWER_TRANS_TCP | GST_RTSP_LOWER_TRANS_UDP |

        GST_RTSP_LOWER_TRANS_UDP_MCAST;

    p += RTSP_PROTO_LEN;

  } else if (g_str_has_prefix (p, RTSPU_PROTO)) {

    res->transports = GST_RTSP_LOWER_TRANS_UDP | GST_RTSP_LOWER_TRANS_UDP_MCAST;

    p += RTSPU_PROTO_LEN;

  } else if (g_str_has_prefix (p, RTSPT_PROTO)) {

    res->transports = GST_RTSP_LOWER_TRANS_TCP;

    p += RTSPT_PROTO_LEN;

  } else

    goto invalid;

  delim = strpbrk (p, "/?");

  at = strchr (p, '@');

  if (at && delim && at > delim)

    at = NULL;

  if (at) {

    col = strchr (p, ':');

    /* must have a ':' and it must be before the '@' */

    if (col == NULL || col > at)

      goto invalid;

    res->user = g_strndup (p, col - p);

    col++;

    res->passwd = g_strndup (col, at - col);

    /* move to host */

    p = at + 1;

  }

  col = strchr (p, ':');

  /* we have a ':' and a delimiter but the ':' is after the delimiter, it's

   * not really part of the hostname */

  if (col && delim && col >= delim)

    col = NULL;

  if (col) {

    res->host = g_strndup (p, col - p);

    p = col + 1;

    res->port = strtoul (p, (char **) &p, 10);

    if (delim)

      p = delim;

  } else {

    /* no port specified, set to 0. _get_port() will return the default port. */

    res->port = 0;

    if (!delim) {

      res->host = g_strdup (p);

      p = NULL;

    } else {

      res->host = g_strndup (p, delim - p);

      p = delim;

    }

  }

  if (p && *p == '/') {

    delim = strchr (p, '?');

    if (!delim) {

      res->abspath = g_strdup (p);

      p = NULL;

    } else {

      res->abspath = g_strndup (p, delim - p);

      p = delim;

    }

  } else {

    res->abspath = g_strdup ("/");

  }

  if (p && *p == '?')

    res->query = g_strdup (p + 1);

  *url = res;

  return GST_RTSP_OK;

  /* ERRORS */

invalid:

  {

    gst_rtsp_url_free (res);

    return GST_RTSP_EINVAL;

  }

}

/**

 * gst_rtsp_url_free:

 * @url: a #GstRTSPUrl

 *

 * Free the memory used by @url.

 */

void

gst_rtsp_url_free (GstRTSPUrl * url)

{

  if (url == NULL)

    return;

  g_free (url->user);

  g_free (url->passwd);

  g_free (url->host);

  g_free (url->abspath);

  g_free (url->query);

  g_free (url);

}

/**

 * gst_rtsp_url_set_port:

 * @url: a #GstRTSPUrl

 * @port: the port

 *

 * Set the port number in @url to @port.

 *

 * Returns: #GST_RTSP_OK.

 */

GstRTSPResult

gst_rtsp_url_set_port (GstRTSPUrl * url, guint16 port)

{

  g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);

  url->port = port;

  return GST_RTSP_OK;

}

/**

 * gst_rtsp_url_get_port:

 * @url: a #GstRTSPUrl

 * @port: location to hold the port

 *

 * Get the port number of @url.

 *

 * Returns: #GST_RTSP_OK.

 */

GstRTSPResult

gst_rtsp_url_get_port (GstRTSPUrl * url, guint16 * port)

{

  g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);

  g_return_val_if_fail (port != NULL, GST_RTSP_EINVAL);

  /* if a port was specified, use that else use the default port. */

  if (url->port != 0)

    *port = url->port;

  else

    *port = GST_RTSP_DEFAULT_PORT;

  return GST_RTSP_OK;

}

/**

 * gst_rtsp_url_get_request_uri:

 * @url: a #GstRTSPUrl

 *

 * Get a newly allocated string describing the request URI for @url. 

 *

 * Returns: a string with the request URI. g_free() after usage.

 */

gchar *

gst_rtsp_url_get_request_uri (GstRTSPUrl * url)

{

  gchar *uri;

  g_return_val_if_fail (url != NULL, NULL);

  if (url->port != 0) {

    uri = g_strdup_printf ("rtsp://%s:%u%s%s%s", url->host, url->port,

        url->abspath, url->query ? "?" : "", url->query ? url->query : "");

  } else {

    uri = g_strdup_printf ("rtsp://%s%s%s%s", url->host, url->abspath,

        url->query ? "?" : "", url->query ? url->query : "");

  }

  return uri;

}