git.maemo.org Git - connman/blob - src/udev.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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 <sys/types.h>
  27
  28 #define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
  29 #include <libudev.h>
  30
  31 #include <glib.h>
  32
  33 #include "connman.h"
  34
  35 #ifdef NEED_UDEV_DEVICE_GET_PARENT_WITH_DEVTYPE
  36 static struct udev_device *udev_device_get_parent_with_devtype(struct udev_device *device,
  37                                                                 const char *devtype)
  38 {
  39         return NULL;
  40 }
  41 #endif
  42
  43 #ifdef NEED_UDEV_ENUMERATE_ADD_MATCH_PROPERTY
  44 static int udev_enumerate_add_match_property(struct udev_enumerate *enumerate,
  45                                         const char *property, const char *value)
  46 {
  47         return 0;
  48 }
  49 #endif
  50
  51 static GSList *device_list = NULL;
  52
  53 static struct connman_device *find_device(const char *interface)
  54 {
  55         GSList *list;
  56
  57         if (interface == NULL)
  58                 return NULL;
  59
  60         for (list = device_list; list; list = list->next) {
  61                 struct connman_device *device = list->data;
  62                 const char *device_interface;
  63
  64                 device_interface = connman_device_get_interface(device);
  65                 if (device_interface == NULL)
  66                         continue;
  67
  68                 if (g_str_equal(device_interface, interface) == TRUE)
  69                         return device;
  70         }
  71
  72         return NULL;
  73 }
  74
  75 static void add_device(struct udev_device *udev_device)
  76 {
  77         enum connman_device_type devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
  78         struct connman_device *device;
  79         struct udev_list_entry *entry;
  80         const char *type = NULL, *interface = NULL;
  81
  82         DBG("");
  83
  84         entry = udev_device_get_properties_list_entry(udev_device);
  85         while (entry) {
  86                 const char *name = udev_list_entry_get_name(entry);
  87
  88                 if (g_str_has_prefix(name, "CONNMAN_TYPE") == TRUE)
  89                         type = udev_list_entry_get_value(entry);
  90                 else if (g_str_has_prefix(name, "CONNMAN_INTERFACE") == TRUE)
  91                         interface = udev_list_entry_get_value(entry);
  92
  93                 entry = udev_list_entry_get_next(entry);
  94         }
  95
  96         device = find_device(interface);
  97         if (device != NULL)
  98                 return;
  99
 100         if (type == NULL || interface == NULL)
 101                 return;
 102
 103         if (g_str_equal(interface, "ttyUSB0") == FALSE)
 104                 return;
 105
 106         if (g_str_equal(type, "huawei") == TRUE)
 107                 devtype = CONNMAN_DEVICE_TYPE_HUAWEI;
 108         else
 109                 return;
 110
 111         device = connman_device_create(interface, devtype);
 112         if (device == NULL)
 113                 return;
 114
 115         connman_device_set_mode(device, CONNMAN_DEVICE_MODE_NETWORK_SINGLE);
 116         connman_device_set_policy(device, CONNMAN_DEVICE_POLICY_MANUAL);
 117
 118         connman_device_set_interface(device, interface);
 119
 120         if (connman_device_register(device) < 0) {
 121                 connman_device_unref(device);
 122                 return;
 123         }
 124
 125         device_list = g_slist_append(device_list, device);
 126 }
 127
 128 static void remove_device(struct udev_device *udev_device)
 129 {
 130         struct connman_device *device;
 131         struct udev_list_entry *entry;
 132         const char *interface = NULL;
 133
 134         DBG("");
 135
 136         entry = udev_device_get_properties_list_entry(udev_device);
 137         while (entry) {
 138                 const char *name = udev_list_entry_get_name(entry);
 139
 140                 if (g_str_has_prefix(name, "CONNMAN_INTERFACE") == TRUE)
 141                         interface = udev_list_entry_get_value(entry);
 142
 143                 entry = udev_list_entry_get_next(entry);
 144         }
 145
 146         device = find_device(interface);
 147         if (device == NULL)
 148                 return;
 149
 150         device_list = g_slist_remove(device_list, device);
 151
 152         connman_device_unregister(device);
 153         connman_device_unref(device);
 154 }
 155
 156 static void print_properties(struct udev_device *device, const char *prefix)
 157 {
 158         struct udev_list_entry *entry;
 159
 160         entry = udev_device_get_properties_list_entry(device);
 161         while (entry) {
 162                 const char *name = udev_list_entry_get_name(entry);
 163                 const char *value = udev_list_entry_get_value(entry);
 164
 165                 if (g_str_has_prefix(name, "CONNMAN") == TRUE ||
 166                                 g_str_equal(name, "DEVNAME") == TRUE ||
 167                                         g_str_equal(name, "DEVPATH") == TRUE)
 168                         connman_debug("%s%s = %s", prefix, name, value);
 169
 170                 entry = udev_list_entry_get_next(entry);
 171         }
 172 }
 173
 174 static void print_device(struct udev_device *device, const char *action)
 175 {
 176         struct udev_device *parent;
 177
 178         connman_debug("=== %s ===", action);
 179         print_properties(device, "");
 180
 181         parent = udev_device_get_parent_with_devtype(device, "usb_device");
 182         print_properties(parent, "    ");
 183 }
 184
 185 static void enumerate_devices(struct udev *context)
 186 {
 187         struct udev_enumerate *enumerate;
 188         struct udev_list_entry *entry;
 189
 190         enumerate = udev_enumerate_new(context);
 191         if (enumerate == NULL)
 192                 return;
 193
 194         udev_enumerate_add_match_property(enumerate, "CONNMAN_TYPE", "?*");
 195
 196         udev_enumerate_scan_devices(enumerate);
 197
 198         entry = udev_enumerate_get_list_entry(enumerate);
 199         while (entry) {
 200                 const char *syspath = udev_list_entry_get_name(entry);
 201                 struct udev_device *device;
 202
 203                 device = udev_device_new_from_syspath(context, syspath);
 204
 205                 print_device(device, "coldplug");
 206
 207                 add_device(device);
 208
 209                 udev_device_unref(device);
 210
 211                 entry = udev_list_entry_get_next(entry);
 212         }
 213
 214         udev_enumerate_unref(enumerate);
 215 }
 216
 217 static gboolean udev_event(GIOChannel *channel,
 218                                 GIOCondition condition, gpointer user_data)
 219 {
 220         struct udev_monitor *monitor = user_data;
 221         struct udev_device *device;
 222         const char *action;
 223
 224         device = udev_monitor_receive_device(monitor);
 225         if (device == NULL)
 226                 return TRUE;
 227
 228         action = udev_device_get_action(device);
 229         if (action == NULL)
 230                 goto done;
 231
 232         print_device(device, action);
 233
 234         if (g_str_equal(action, "add") == TRUE)
 235                 add_device(device);
 236         else if (g_str_equal(action, "remove") == TRUE)
 237                 remove_device(device);
 238
 239 done:
 240         udev_device_unref(device);
 241
 242         return TRUE;
 243 }
 244
 245 static struct udev *udev_ctx;
 246 static struct udev_monitor *udev_mon;
 247 static guint udev_watch = 0;
 248
 249 int __connman_udev_init(void)
 250 {
 251         GIOChannel *channel;
 252         int fd;
 253
 254         DBG("");
 255
 256         udev_ctx = udev_new();
 257         if (udev_ctx == NULL) {
 258                 connman_error("Failed to create udev context");
 259                 return -1;
 260         }
 261
 262         udev_mon = udev_monitor_new_from_socket(udev_ctx,
 263                                                 "@/org/moblin/connman/udev");
 264         if (udev_mon == NULL) {
 265                 connman_error("Failed to create udev monitor");
 266                 udev_unref(udev_ctx);
 267                 udev_ctx = NULL;
 268                 return -1;
 269         }
 270
 271         if (udev_monitor_enable_receiving(udev_mon) < 0) {
 272                 connman_error("Failed to enable udev monitor");
 273                 udev_unref(udev_ctx);
 274                 udev_ctx = NULL;
 275                 udev_monitor_unref(udev_mon);
 276                 return -1;
 277         }
 278
 279         enumerate_devices(udev_ctx);
 280
 281         fd = udev_monitor_get_fd(udev_mon);
 282
 283         channel = g_io_channel_unix_new(fd);
 284         if (channel == NULL)
 285                 return 0;
 286
 287         udev_watch = g_io_add_watch(channel, G_IO_IN, udev_event, udev_mon);
 288
 289         g_io_channel_unref(channel);
 290
 291         return 0;
 292 }
 293
 294 void __connman_udev_cleanup(void)
 295 {
 296         GSList *list;
 297
 298         DBG("");
 299
 300         if (udev_watch > 0)
 301                 g_source_remove(udev_watch);
 302
 303         for (list = device_list; list; list = list->next) {
 304                 struct connman_device *device = list->data;
 305
 306                 connman_device_unregister(device);
 307                 connman_device_unref(device);
 308         }
 309
 310         g_slist_free(device_list);
 311         device_list = NULL;
 312
 313         if (udev_ctx == NULL)
 314                 return;
 315
 316         udev_monitor_unref(udev_mon);
 317         udev_unref(udev_ctx);
 318 }