plugins/rtnllink.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/stat.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/socket.h>
  32 #include <linux/if_arp.h>
  33 #include <linux/wireless.h>
  34
  35 #include <connman/plugin.h>
  36 #include <connman/element.h>
  37 #include <connman/rtnl.h>
  38 #include <connman/log.h>
  39
  40 #include "inet.h"
  41
  42 static GStaticMutex device_mutex = G_STATIC_MUTEX_INIT;
  43 static GSList *device_list = NULL;
  44
  45 static void rtnllink_newlink(unsigned short type, int index,
  46                                         unsigned flags, unsigned change)
  47 {
  48         enum connman_element_subtype subtype = CONNMAN_ELEMENT_SUBTYPE_UNKNOWN;
  49         struct connman_element *device;
  50         GSList *list;
  51         gboolean exists = FALSE;
  52         gchar *name;
  53
  54         DBG("index %d", index);
  55
  56         g_static_mutex_lock(&device_mutex);
  57
  58         for (list = device_list; list; list = list->next) {
  59                 struct connman_element *device = list->data;
  60
  61                 if (device->index == index) {
  62                         exists = TRUE;
  63                         break;
  64                 }
  65         }
  66
  67         g_static_mutex_unlock(&device_mutex);
  68
  69         if (exists == TRUE)
  70                 return;
  71
  72         name = inet_index2name(index);
  73
  74         if (type == ARPHRD_ETHER) {
  75                 char bridge_path[PATH_MAX], wimax_path[PATH_MAX];
  76                 struct stat st;
  77                 struct iwreq iwr;
  78                 int sk;
  79
  80                 snprintf(bridge_path, PATH_MAX,
  81                                         "/sys/class/net/%s/bridge", name);
  82                 snprintf(wimax_path, PATH_MAX,
  83                                         "/sys/class/net/%s/wimax", name);
  84
  85                 memset(&iwr, 0, sizeof(iwr));
  86                 strncpy(iwr.ifr_ifrn.ifrn_name, name, IFNAMSIZ);
  87
  88                 sk = socket(PF_INET, SOCK_DGRAM, 0);
  89
  90                 if (g_str_has_prefix(name, "bnep") == TRUE)
  91                         subtype = CONNMAN_ELEMENT_SUBTYPE_BLUETOOTH;
  92                 else if (stat(bridge_path, &st) == 0 && (st.st_mode & S_IFDIR))
  93                         subtype = CONNMAN_ELEMENT_SUBTYPE_UNKNOWN;
  94                 else if (stat(wimax_path, &st) == 0 && (st.st_mode & S_IFDIR))
  95                         subtype = CONNMAN_ELEMENT_SUBTYPE_WIMAX;
  96                 else if (ioctl(sk, SIOCGIWNAME, &iwr) == 0)
  97                         subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
  98                 else
  99                         subtype = CONNMAN_ELEMENT_SUBTYPE_ETHERNET;
 100
 101                 close(sk);
 102         }
 103
 104         if (subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN) {
 105                 g_free(name);
 106                 return;
 107         }
 108
 109         device = connman_element_create(NULL);
 110         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 111         device->subtype = subtype;
 112
 113         device->index = index;
 114         device->name = name;
 115
 116         g_static_mutex_lock(&device_mutex);
 117
 118         connman_element_register(device, NULL);
 119         device_list = g_slist_append(device_list, device);
 120
 121         g_static_mutex_unlock(&device_mutex);
 122 }
 123
 124 static void rtnllink_dellink(unsigned short type, int index,
 125                                         unsigned flags, unsigned change)
 126 {
 127         GSList *list;
 128
 129         DBG("index %d", index);
 130
 131         g_static_mutex_lock(&device_mutex);
 132
 133         for (list = device_list; list; list = list->next) {
 134                 struct connman_element *device = list->data;
 135
 136                 if (device->index == index) {
 137                         device_list = g_slist_remove(device_list, device);
 138                         connman_element_unregister(device);
 139                         connman_element_unref(device);
 140                         break;
 141                 }
 142         }
 143
 144         g_static_mutex_unlock(&device_mutex);
 145 }
 146
 147 static struct connman_rtnl rtnllink_rtnl = {
 148         .name           = "rtnllink",
 149         .newlink        = rtnllink_newlink,
 150         .dellink        = rtnllink_dellink,
 151 };
 152
 153 static int rtnllink_init(void)
 154 {
 155         int err;
 156
 157         err = connman_rtnl_register(&rtnllink_rtnl);
 158         if (err < 0)
 159                 return err;
 160
 161         connman_rtnl_send_getlink();
 162
 163         return 0;
 164 }
 165
 166 static void rtnllink_exit(void)
 167 {
 168         GSList *list;
 169
 170         connman_rtnl_unregister(&rtnllink_rtnl);
 171
 172         g_static_mutex_lock(&device_mutex);
 173
 174         for (list = device_list; list; list = list->next) {
 175                 struct connman_element *device = list->data;
 176
 177                 connman_element_unregister(device);
 178                 connman_element_unref(device);
 179         }
 180
 181         g_slist_free(device_list);
 182         device_list = NULL;
 183
 184         g_static_mutex_unlock(&device_mutex);
 185 }
 186
 187 CONNMAN_PLUGIN_DEFINE("rtnllink", "RTNL link detection plugin", VERSION,
 188                                                 rtnllink_init, rtnllink_exit)