gstreamer/gst/rtsp-server/rtsp-permissions.c

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/* GStreamer
* Copyright (C) 2013 Wim Taymans <wim.taymans at gmail.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
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/**
* SECTION:rtsp-permissions
* @short_description: Roles and associated permissions
* @see_also: #GstRTSPToken, #GstRTSPAuth
*
* The #GstRTSPPermissions object contains an array of roles and associated
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* permissions. The roles are represented with a string and the permissions with
* a generic #GstStructure.
*
* The permissions are deliberately kept generic. The possible values of the
* roles and #GstStructure keys and values are only determined by the #GstRTSPAuth
* object that performs the checks on the permissions and the current
* #GstRTSPToken.
*
* As a convenience function, gst_rtsp_permissions_is_allowed() can be used to
* check if the permissions contains a role that contains the boolean value
* %TRUE for the the given key.
*
* Last reviewed on 2013-07-15 (1.0.0)
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*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include <string.h>
#include "rtsp-permissions.h"
typedef struct _GstRTSPPermissionsImpl
{
GstRTSPPermissions permissions;
/* Roles, array of GstStructure */
GPtrArray *roles;
} GstRTSPPermissionsImpl;
static void
free_structure (GstStructure * structure)
{
gst_structure_set_parent_refcount (structure, NULL);
gst_structure_free (structure);
}
//GST_DEBUG_CATEGORY_STATIC (rtsp_permissions_debug);
//#define GST_CAT_DEFAULT rtsp_permissions_debug
GST_DEFINE_MINI_OBJECT_TYPE (GstRTSPPermissions, gst_rtsp_permissions);
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static void gst_rtsp_permissions_init (GstRTSPPermissionsImpl * permissions);
static void
_gst_rtsp_permissions_free (GstRTSPPermissions * permissions)
{
GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
g_ptr_array_free (impl->roles, TRUE);
g_slice_free1 (sizeof (GstRTSPPermissionsImpl), permissions);
}
static GstRTSPPermissions *
_gst_rtsp_permissions_copy (GstRTSPPermissionsImpl * permissions)
{
GstRTSPPermissionsImpl *copy;
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guint i;
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copy = (GstRTSPPermissionsImpl *) gst_rtsp_permissions_new ();
for (i = 0; i < permissions->roles->len; i++) {
GstStructure *entry = g_ptr_array_index (permissions->roles, i);
GstStructure *entry_copy = gst_structure_copy (entry);
gst_structure_set_parent_refcount (entry_copy,
&copy->permissions.mini_object.refcount);
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g_ptr_array_add (copy->roles, entry_copy);
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}
return GST_RTSP_PERMISSIONS (copy);
}
static void
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gst_rtsp_permissions_init (GstRTSPPermissionsImpl * permissions)
{
gst_mini_object_init (GST_MINI_OBJECT_CAST (permissions), 0,
GST_TYPE_RTSP_PERMISSIONS,
(GstMiniObjectCopyFunction) _gst_rtsp_permissions_copy, NULL,
(GstMiniObjectFreeFunction) _gst_rtsp_permissions_free);
permissions->roles =
g_ptr_array_new_with_free_func ((GDestroyNotify) free_structure);
}
static void
add_role_from_structure (GstRTSPPermissionsImpl * impl,
GstStructure * structure)
{
guint i, len;
const gchar *role = gst_structure_get_name (structure);
len = impl->roles->len;
for (i = 0; i < len; i++) {
GstStructure *entry = g_ptr_array_index (impl->roles, i);
if (gst_structure_has_name (entry, role)) {
g_ptr_array_remove_index_fast (impl->roles, i);
break;
}
}
gst_structure_set_parent_refcount (structure,
&impl->permissions.mini_object.refcount);
g_ptr_array_add (impl->roles, structure);
}
/**
* gst_rtsp_permissions_new:
*
* Create a new empty Authorization permissions.
*
* Returns: (transfer full): a new empty authorization permissions.
*/
GstRTSPPermissions *
gst_rtsp_permissions_new (void)
{
GstRTSPPermissionsImpl *permissions;
permissions = g_slice_new0 (GstRTSPPermissionsImpl);
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gst_rtsp_permissions_init (permissions);
return GST_RTSP_PERMISSIONS (permissions);
}
/**
* gst_rtsp_permissions_add_permission_for_role:
* @permissions: a #GstRTSPPermissions
* @role: a role
* @permission: the permission
* @allowed: whether the role has this permission or not
*
* Add a new @permission for @role to @permissions with the access in @allowed.
*
* Since: 1.14
*/
void
gst_rtsp_permissions_add_permission_for_role (GstRTSPPermissions * permissions,
const gchar * role, const gchar * permission, gboolean allowed)
{
GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
guint i, len;
g_return_if_fail (GST_IS_RTSP_PERMISSIONS (permissions));
g_return_if_fail (gst_mini_object_is_writable (&permissions->mini_object));
g_return_if_fail (role != NULL);
g_return_if_fail (permission != NULL);
len = impl->roles->len;
for (i = 0; i < len; i++) {
GstStructure *entry = g_ptr_array_index (impl->roles, i);
if (gst_structure_has_name (entry, role)) {
gst_structure_set (entry, permission, G_TYPE_BOOLEAN, allowed, NULL);
return;
}
}
gst_rtsp_permissions_add_role (permissions, role,
permission, G_TYPE_BOOLEAN, allowed, NULL);
}
/**
* gst_rtsp_permissions_add_role_empty: (rename-to gst_rtsp_permissions_add_role)
* @permissions: a #GstRTSPPermissions
* @role: a role
*
* Add a new @role to @permissions without any permissions. You can add
* permissions for the role with gst_rtsp_permissions_add_permission_for_role().
*
* Since: 1.14
*/
void
gst_rtsp_permissions_add_role_empty (GstRTSPPermissions * permissions,
const gchar * role)
{
gst_rtsp_permissions_add_role (permissions, role, NULL);
}
/**
* gst_rtsp_permissions_add_role:
* @permissions: a #GstRTSPPermissions
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* @role: a role
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* @fieldname: the first field name
* @...: additional arguments
*
* Add a new @role to @permissions with the given variables. The fields
* are the same layout as gst_structure_new().
*/
void
gst_rtsp_permissions_add_role (GstRTSPPermissions * permissions,
const gchar * role, const gchar * fieldname, ...)
{
va_list var_args;
va_start (var_args, fieldname);
gst_rtsp_permissions_add_role_valist (permissions, role, fieldname, var_args);
va_end (var_args);
}
/**
* gst_rtsp_permissions_add_role_valist:
* @permissions: a #GstRTSPPermissions
* @role: a role
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* @fieldname: the first field name
* @var_args: additional fields to add
*
* Add a new @role to @permissions with the given variables. Structure fields
* are set according to the varargs in a manner similar to gst_structure_new().
*/
void
gst_rtsp_permissions_add_role_valist (GstRTSPPermissions * permissions,
const gchar * role, const gchar * fieldname, va_list var_args)
{
GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
GstStructure *structure;
g_return_if_fail (GST_IS_RTSP_PERMISSIONS (permissions));
g_return_if_fail (gst_mini_object_is_writable (&permissions->mini_object));
g_return_if_fail (role != NULL);
structure = gst_structure_new_valist (role, fieldname, var_args);
g_return_if_fail (structure != NULL);
add_role_from_structure (impl, structure);
}
/**
* gst_rtsp_permissions_add_role_from_structure:
*
* Add a new role to @permissions based on @structure, for example
* given a role named `tester`, which should be granted a permission named
* `permission1`, the structure could be created with:
*
* ```
* gst_structure_new ("tester", "permission1", G_TYPE_BOOLEAN, TRUE, NULL);
* ```
*
* Since: 1.14
*/
void
gst_rtsp_permissions_add_role_from_structure (GstRTSPPermissions * permissions,
GstStructure * structure)
{
GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
GstStructure *copy;
g_return_if_fail (GST_IS_RTSP_PERMISSIONS (permissions));
g_return_if_fail (GST_IS_STRUCTURE (structure));
copy = gst_structure_copy (structure);
add_role_from_structure (impl, copy);
}
/**
* gst_rtsp_permissions_remove_role:
* @permissions: a #GstRTSPPermissions
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* @role: a role
*
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* Remove all permissions for @role in @permissions.
*/
void
gst_rtsp_permissions_remove_role (GstRTSPPermissions * permissions,
const gchar * role)
{
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GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
guint i, len;
g_return_if_fail (GST_IS_RTSP_PERMISSIONS (permissions));
g_return_if_fail (gst_mini_object_is_writable (&permissions->mini_object));
g_return_if_fail (role != NULL);
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len = impl->roles->len;
for (i = 0; i < len; i++) {
GstStructure *entry = g_ptr_array_index (impl->roles, i);
if (gst_structure_has_name (entry, role)) {
g_ptr_array_remove_index_fast (impl->roles, i);
break;
}
}
}
/**
* gst_rtsp_permissions_get_role:
* @permissions: a #GstRTSPPermissions
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* @role: a role
*
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* Get all permissions for @role in @permissions.
*
* Returns: (transfer none): the structure with permissions for @role. It
* remains valid for as long as @permissions is valid.
*/
const GstStructure *
gst_rtsp_permissions_get_role (GstRTSPPermissions * permissions,
const gchar * role)
{
GstRTSPPermissionsImpl *impl = (GstRTSPPermissionsImpl *) permissions;
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guint i, len;
g_return_val_if_fail (GST_IS_RTSP_PERMISSIONS (permissions), NULL);
g_return_val_if_fail (role != NULL, NULL);
len = impl->roles->len;
for (i = 0; i < len; i++) {
GstStructure *entry = g_ptr_array_index (impl->roles, i);
if (gst_structure_has_name (entry, role))
return entry;
}
return NULL;
}
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/**
* gst_rtsp_permissions_is_allowed:
* @permissions: a #GstRTSPPermissions
* @role: a role
* @permission: a permission
*
* Check if @role in @permissions is given permission for @permission.
*
* Returns: %TRUE if @role is allowed @permission.
*/
gboolean
gst_rtsp_permissions_is_allowed (GstRTSPPermissions * permissions,
const gchar * role, const gchar * permission)
{
const GstStructure *str;
gboolean result;
g_return_val_if_fail (GST_IS_RTSP_PERMISSIONS (permissions), FALSE);
g_return_val_if_fail (role != NULL, FALSE);
g_return_val_if_fail (permission != NULL, FALSE);
str = gst_rtsp_permissions_get_role (permissions, role);
if (str == NULL)
return FALSE;
if (!gst_structure_get_boolean (str, permission, &result))
result = FALSE;
return result;
}