obexd/src/service.c

   1 /*
   2  *
   3  *  OBEX Server
   4  *
   5  *  Copyright (C) 2007-2010  Marcel Holtmann <marcel@holtmann.org>
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  *
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <errno.h>
  30 #include <string.h>
  31 #include <stdint.h>
  32 #include <stdlib.h>
  33
  34 #include <glib.h>
  35
  36 #include "obex.h"
  37 #include "service.h"
  38 #include "log.h"
  39
  40 static GSList *drivers = NULL;
  41
  42 struct obex_service_driver *obex_service_driver_find(GSList *drivers,
  43                         const uint8_t *target, unsigned int target_size,
  44                         const uint8_t *who, unsigned int who_size)
  45 {
  46         GSList *l;
  47
  48         for (l = drivers; l; l = l->next) {
  49                 struct obex_service_driver *driver = l->data;
  50
  51                 /* who is optional, so only check for it if not NULL */
  52                 if (who != NULL && memncmp0(who, who_size, driver->who,
  53                                                         driver->who_size))
  54                         continue;
  55
  56                 if (memncmp0(target, target_size, driver->target,
  57                                                 driver->target_size) == 0)
  58                         return driver;
  59         }
  60
  61         return NULL;
  62 }
  63
  64 GSList *obex_service_driver_list(uint16_t services)
  65 {
  66         GSList *l;
  67         GSList *list = NULL;
  68
  69         if (services == 0)
  70                 return drivers;
  71
  72         for (l = drivers; l && services; l = l->next) {
  73                 struct obex_service_driver *driver = l->data;
  74
  75                 if (driver->service & services) {
  76                         list = g_slist_append(list, driver);
  77                         services &= ~driver->service;
  78                 }
  79         }
  80
  81         return list;
  82 }
  83
  84 static struct obex_service_driver *find_driver(uint16_t service)
  85 {
  86         GSList *l;
  87
  88         for (l = drivers; l; l = l->next) {
  89                 struct obex_service_driver *driver = l->data;
  90
  91                 if (driver->service == service)
  92                         return driver;
  93         }
  94
  95         return NULL;
  96 }
  97
  98 int obex_service_driver_register(struct obex_service_driver *driver)
  99 {
 100         if (!driver) {
 101                 error("Invalid driver");
 102                 return -EINVAL;
 103         }
 104
 105         if (find_driver(driver->service)) {
 106                 error("Permission denied: service %s already registered",
 107                         driver->name);
 108                 return -EPERM;
 109         }
 110
 111         DBG("driver %p service %s registered", driver, driver->name);
 112
 113         /* Drivers that support who has priority */
 114         if (driver->who)
 115                 drivers = g_slist_prepend(drivers, driver);
 116         else
 117                 drivers = g_slist_append(drivers, driver);
 118
 119         return 0;
 120 }
 121
 122 void obex_service_driver_unregister(struct obex_service_driver *driver)
 123 {
 124         if (!g_slist_find(drivers, driver)) {
 125                 error("Unable to unregister: No such driver %p", driver);
 126                 return;
 127         }
 128
 129         DBG("driver %p service %s unregistered", driver, driver->name);
 130
 131         drivers = g_slist_remove(drivers, driver);
 132 }