dbus/interface.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2008, 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  * Copyright (C) 2008 Juuso Alasuutari <juuso.alasuutari@gmail.com>
   7  *
   8  **************************************************************************
   9  * This file contains D-Bus interface dispatcher
  10  **************************************************************************
  11  *
  12  * Licensed under the Academic Free License version 2.1
  13  *
  14  * LADI Session Handler is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * LADI Session Handler is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  26  * or write to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  28  */
  29
  30 #include "../common.h"
  31 #include "helpers.h"
  32 #include <string.h>
  33 #include "error.h"
  34
  35 /*
  36  * Execute a method's function if the method specified in the method call
  37  * object exists in the method array. Return true if the method was found,
  38  * false otherwise.
  39  */
  40 bool dbus_interface_default_handler(const struct dbus_interface_descriptor * iface_ptr, struct dbus_method_call * call_ptr)
  41 {
  42   const struct dbus_method_descriptor * method_ptr;
  43
  44   for (method_ptr = iface_ptr->methods; method_ptr->name != NULL; method_ptr++)
  45   {
  46     if (strcmp(call_ptr->method_name, method_ptr->name) == 0)
  47     {
  48       call_ptr->iface = iface_ptr;
  49       method_ptr->handler(call_ptr);
  50       /* If the method handler didn't construct a return message create a void one here */
  51       // TODO: Also handle cases where the sender doesn't need a reply
  52       if (call_ptr->reply == NULL)
  53       {
  54         call_ptr->reply = dbus_message_new_method_return(call_ptr->message);
  55         if (call_ptr->reply == NULL)
  56         {
  57           log_error("Failed to construct void method return");
  58         }
  59       }
  60
  61       /* Known method */
  62       return true;
  63     }
  64   }
  65
  66   /* Unknown method */
  67   return false;
  68 }