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_ENUMERATE_ADD_MATCH_PROPERTY
  36 static int udev_enumerate_add_match_property(struct udev_enumerate *enumerate,
  37                                         const char *property, const char *value)
  38 {
  39         return -EINVAL;
  40 }
  41 #endif
  42
  43 #ifdef NEED_UDEV_DEVICE_GET_PARENT_WITH_SUBSYSTEM_DEVTYPE
  44 static struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *device,
  45                                                 const char *subsystem, const char *devtype)
  46 {
  47         return NULL;
  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                                 g_str_equal(interface, "noz0") == FALSE)
 105                 return;
 106
 107         if (g_str_equal(type, "nozomi") == TRUE)
 108                 devtype = CONNMAN_DEVICE_TYPE_NOZOMI;
 109         else if (g_str_equal(type, "huawei") == TRUE)
 110                 devtype = CONNMAN_DEVICE_TYPE_HUAWEI;
 111         else if (g_str_equal(type, "novatel") == TRUE)
 112                 devtype = CONNMAN_DEVICE_TYPE_NOVATEL;
 113         else
 114                 return;
 115
 116         device = connman_device_create(interface, devtype);
 117         if (device == NULL)
 118                 return;
 119
 120         connman_device_set_mode(device, CONNMAN_DEVICE_MODE_NETWORK_SINGLE);
 121         connman_device_set_policy(device, CONNMAN_DEVICE_POLICY_MANUAL);
 122
 123         connman_device_set_interface(device, interface);
 124
 125         if (connman_device_register(device) < 0) {
 126                 connman_device_unref(device);
 127                 return;
 128         }
 129
 130         device_list = g_slist_append(device_list, device);
 131 }
 132
 133 static void remove_device(struct udev_device *udev_device)
 134 {
 135         struct connman_device *device;
 136         struct udev_list_entry *entry;
 137         const char *interface = NULL;
 138
 139         DBG("");
 140
 141         entry = udev_device_get_properties_list_entry(udev_device);
 142         while (entry) {
 143                 const char *name = udev_list_entry_get_name(entry);
 144
 145                 if (g_str_has_prefix(name, "CONNMAN_INTERFACE") == TRUE)
 146                         interface = udev_list_entry_get_value(entry);
 147
 148                 entry = udev_list_entry_get_next(entry);
 149         }
 150
 151         device = find_device(interface);
 152         if (device == NULL)
 153                 return;
 154
 155         device_list = g_slist_remove(device_list, device);
 156
 157         connman_device_unregister(device);
 158         connman_device_unref(device);
 159 }
 160
 161 static void print_properties(struct udev_device *device, const char *prefix)
 162 {
 163         struct udev_list_entry *entry;
 164
 165         entry = udev_device_get_properties_list_entry(device);
 166         while (entry) {
 167                 const char *name = udev_list_entry_get_name(entry);
 168                 const char *value = udev_list_entry_get_value(entry);
 169
 170                 if (g_str_has_prefix(name, "CONNMAN") == TRUE ||
 171                                 g_str_has_prefix(name, "ID_MODEM") == TRUE ||
 172                                         g_str_equal(name, "DEVNAME") == TRUE ||
 173                                         g_str_equal(name, "DEVPATH") == TRUE)
 174                         connman_debug("%s%s = %s", prefix, name, value);
 175
 176                 entry = udev_list_entry_get_next(entry);
 177         }
 178 }
 179
 180 static void print_device(struct udev_device *device, const char *action)
 181 {
 182         const char *subsystem = udev_device_get_subsystem(device);
 183         const char *devtype = NULL;
 184         struct udev_device *parent;
 185
 186         connman_debug("=== %s ===", action);
 187         print_properties(device, "");
 188
 189         if (subsystem != NULL && g_str_equal(subsystem, "usb") == TRUE)
 190                 devtype = "usb_device";
 191
 192         parent = udev_device_get_parent_with_subsystem_devtype(device,
 193                                                         subsystem, devtype);
 194         print_properties(parent, "    ");
 195 }
 196
 197 static void enumerate_devices(struct udev *context)
 198 {
 199         struct udev_enumerate *enumerate;
 200         struct udev_list_entry *entry;
 201
 202         enumerate = udev_enumerate_new(context);
 203         if (enumerate == NULL)
 204                 return;
 205
 206         udev_enumerate_add_match_property(enumerate, "CONNMAN_TYPE", "?*");
 207
 208         udev_enumerate_scan_devices(enumerate);
 209
 210         entry = udev_enumerate_get_list_entry(enumerate);
 211         while (entry) {
 212                 const char *syspath = udev_list_entry_get_name(entry);
 213                 struct udev_device *device;
 214
 215                 device = udev_device_new_from_syspath(context, syspath);
 216
 217                 print_device(device, "coldplug");
 218
 219                 add_device(device);
 220
 221                 udev_device_unref(device);
 222
 223                 entry = udev_list_entry_get_next(entry);
 224         }
 225
 226         udev_enumerate_unref(enumerate);
 227 }
 228
 229 static gboolean udev_event(GIOChannel *channel,
 230                                 GIOCondition condition, gpointer user_data)
 231 {
 232         struct udev_monitor *monitor = user_data;
 233         struct udev_device *device;
 234         const char *action;
 235
 236         device = udev_monitor_receive_device(monitor);
 237         if (device == NULL)
 238                 return TRUE;
 239
 240         action = udev_device_get_action(device);
 241         if (action == NULL)
 242                 goto done;
 243
 244         print_device(device, action);
 245
 246         if (g_str_equal(action, "add") == TRUE)
 247                 add_device(device);
 248         else if (g_str_equal(action, "remove") == TRUE)
 249                 remove_device(device);
 250
 251 done:
 252         udev_device_unref(device);
 253
 254         return TRUE;
 255 }
 256
 257 static struct udev *udev_ctx;
 258 static struct udev_monitor *udev_mon;
 259 static guint udev_watch = 0;
 260
 261 int __connman_udev_init(void)
 262 {
 263         GIOChannel *channel;
 264         int fd;
 265
 266         DBG("");
 267
 268         udev_ctx = udev_new();
 269         if (udev_ctx == NULL) {
 270                 connman_error("Failed to create udev context");
 271                 return -1;
 272         }
 273
 274         udev_mon = udev_monitor_new_from_socket(udev_ctx,
 275                                                 "@/org/moblin/connman/udev");
 276         if (udev_mon == NULL) {
 277                 connman_error("Failed to create udev monitor");
 278                 udev_unref(udev_ctx);
 279                 udev_ctx = NULL;
 280                 return -1;
 281         }
 282
 283         if (udev_monitor_enable_receiving(udev_mon) < 0) {
 284                 connman_error("Failed to enable udev monitor");
 285                 udev_unref(udev_ctx);
 286                 udev_ctx = NULL;
 287                 udev_monitor_unref(udev_mon);
 288                 return -1;
 289         }
 290
 291         enumerate_devices(udev_ctx);
 292
 293         fd = udev_monitor_get_fd(udev_mon);
 294
 295         channel = g_io_channel_unix_new(fd);
 296         if (channel == NULL)
 297                 return 0;
 298
 299         udev_watch = g_io_add_watch(channel, G_IO_IN, udev_event, udev_mon);
 300
 301         g_io_channel_unref(channel);
 302
 303         return 0;
 304 }
 305
 306 void __connman_udev_cleanup(void)
 307 {
 308         GSList *list;
 309
 310         DBG("");
 311
 312         if (udev_watch > 0)
 313                 g_source_remove(udev_watch);
 314
 315         for (list = device_list; list; list = list->next) {
 316                 struct connman_device *device = list->data;
 317
 318                 connman_device_unregister(device);
 319                 connman_device_unref(device);
 320         }
 321
 322         g_slist_free(device_list);
 323         device_list = NULL;
 324
 325         if (udev_ctx == NULL)
 326                 return;
 327
 328         udev_monitor_unref(udev_mon);
 329         udev_unref(udev_ctx);
 330 }