src/ipconfig.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 <net/if.h>
  27
  28 #ifndef IFF_LOWER_UP
  29 #define IFF_LOWER_UP    0x10000
  30 #endif
  31
  32 #include <gdbus.h>
  33
  34 #include "connman.h"
  35
  36 struct connman_ipaddress {
  37         unsigned char prefixlen;
  38         char *address;
  39 };
  40
  41 struct connman_ipconfig {
  42         gint refcount;
  43         int index;
  44         char *interface;
  45         unsigned short type;
  46         unsigned int flags;
  47         enum connman_ipconfig_method method;
  48         GSList *address_list;
  49         char *gateway;
  50 };
  51
  52 static void free_address_list(struct connman_ipconfig *ipconfig)
  53 {
  54         GSList *list;
  55
  56         for (list = ipconfig->address_list; list; list = list->next) {
  57                 struct connman_ipaddress *ipaddress = list->data;
  58
  59                 g_free(ipaddress->address);
  60                 g_free(ipaddress);
  61                 list->data = NULL;
  62         }
  63
  64         g_slist_free(ipconfig->address_list);
  65         ipconfig->address_list = NULL;
  66 }
  67
  68 static struct connman_ipaddress *find_ipaddress(struct connman_ipconfig *ipconfig,
  69                                 unsigned char prefixlen, const char *address)
  70 {
  71         GSList *list;
  72
  73         for (list = ipconfig->address_list; list; list = list->next) {
  74                 struct connman_ipaddress *ipaddress = list->data;
  75
  76                 if (g_strcmp0(ipaddress->address, address) == 0 &&
  77                                         ipaddress->prefixlen == prefixlen)
  78                         return ipaddress;
  79         }
  80
  81         return NULL;
  82 }
  83
  84 /**
  85  * connman_ipconfig_create:
  86  *
  87  * Allocate a new ipconfig structure.
  88  *
  89  * Returns: a newly-allocated #connman_ipconfig structure
  90  */
  91 struct connman_ipconfig *connman_ipconfig_create(int index)
  92 {
  93         struct connman_ipconfig *ipconfig;
  94
  95         DBG("");
  96
  97         ipconfig = g_try_new0(struct connman_ipconfig, 1);
  98         if (ipconfig == NULL)
  99                 return NULL;
 100
 101         ipconfig->refcount = 1;
 102
 103         ipconfig->index = index;
 104         ipconfig->interface = connman_inet_ifname(index);
 105
 106         DBG("ipconfig %p", ipconfig);
 107
 108         connman_info("%s {create} index %d", ipconfig->interface,
 109                                                         ipconfig->index);
 110
 111         return ipconfig;
 112 }
 113
 114 /**
 115  * connman_ipconfig_ref:
 116  * @ipconfig: ipconfig structure
 117  *
 118  * Increase reference counter of ipconfig
 119  */
 120 struct connman_ipconfig *connman_ipconfig_ref(struct connman_ipconfig *ipconfig)
 121 {
 122         g_atomic_int_inc(&ipconfig->refcount);
 123
 124         return ipconfig;
 125 }
 126
 127 /**
 128  * connman_ipconfig_unref:
 129  * @ipconfig: ipconfig structure
 130  *
 131  * Decrease reference counter of ipconfig
 132  */
 133 void connman_ipconfig_unref(struct connman_ipconfig *ipconfig)
 134 {
 135         if (g_atomic_int_dec_and_test(&ipconfig->refcount) == TRUE) {
 136                 connman_info("%s {remove} index %d", ipconfig->interface,
 137                                                         ipconfig->index);
 138
 139                 g_free(ipconfig->gateway);
 140
 141                 free_address_list(ipconfig);
 142
 143                 g_free(ipconfig->interface);
 144                 g_free(ipconfig);
 145         }
 146 }
 147
 148 /**
 149  * connman_ipconfig_set_method:
 150  * @ipconfig: ipconfig structure
 151  * @method: configuration method
 152  *
 153  * Set the configuration method
 154  */
 155 int connman_ipconfig_set_method(struct connman_ipconfig *ipconfig,
 156                                         enum connman_ipconfig_method method)
 157 {
 158         ipconfig->method = method;
 159
 160         return 0;
 161 }
 162
 163 int __connman_ipconfig_get_index(struct connman_ipconfig *ipconfig)
 164 {
 165         return ipconfig->index;
 166 }
 167
 168 unsigned short __connman_ipconfig_get_type(struct connman_ipconfig *ipconfig)
 169 {
 170         return ipconfig->type;
 171 }
 172
 173 unsigned int __connman_ipconfig_get_flags(struct connman_ipconfig *ipconfig)
 174 {
 175         return ipconfig->flags;
 176 }
 177
 178 const char *__connman_ipconfig_get_gateway(struct connman_ipconfig *ipconfig)
 179 {
 180         return ipconfig->gateway;
 181 }
 182
 183 void __connman_ipconfig_update_link(struct connman_ipconfig *ipconfig,
 184                                         unsigned flags, unsigned change)
 185 {
 186         GString *str;
 187
 188         if (flags == ipconfig->flags)
 189                 return;
 190
 191         ipconfig->flags = flags;
 192
 193         str = g_string_new(NULL);
 194         if (str == NULL)
 195                 return;
 196
 197         if (flags & IFF_UP)
 198                 g_string_append(str, "UP");
 199         else
 200                 g_string_append(str, "DOWN");
 201
 202         if (flags & IFF_RUNNING)
 203                 g_string_append(str, ",RUNNING");
 204
 205         if (flags & IFF_LOWER_UP)
 206                 g_string_append(str, ",LOWER_UP");
 207
 208         connman_info("%s {update} flags %u change %u <%s>",
 209                                 ipconfig->interface, flags, change, str->str);
 210
 211         g_string_free(str, TRUE);
 212 }
 213
 214 void __connman_ipconfig_add_address(struct connman_ipconfig *ipconfig,
 215                                 const char *label, unsigned char prefixlen,
 216                                 const char *address, const char *broadcast)
 217 {
 218         struct connman_ipaddress *ipaddress;
 219
 220         ipaddress = g_try_new0(struct connman_ipaddress, 1);
 221         if (ipaddress == NULL)
 222                 return;
 223
 224         ipaddress->prefixlen = prefixlen;
 225         ipaddress->address = g_strdup(address);
 226
 227         ipconfig->address_list = g_slist_append(ipconfig->address_list,
 228                                                                 ipaddress);
 229
 230         connman_info("%s {add} address %s/%u label %s", ipconfig->interface,
 231                                                 address, prefixlen, label);
 232 }
 233
 234 void __connman_ipconfig_del_address(struct connman_ipconfig *ipconfig,
 235                                 const char *label, unsigned char prefixlen,
 236                                 const char *address, const char *broadcast)
 237 {
 238         struct connman_ipaddress *ipaddress;
 239
 240         ipaddress = find_ipaddress(ipconfig, prefixlen, address);
 241         if (ipaddress == NULL)
 242                 return;
 243
 244         ipconfig->address_list = g_slist_remove(ipconfig->address_list,
 245                                                                 ipaddress);
 246
 247         g_free(ipaddress->address);
 248         g_free(ipaddress);
 249
 250         connman_info("%s {del} address %s/%u label %s", ipconfig->interface,
 251                                                 address, prefixlen, label);
 252 }
 253
 254 static const char *scope2str(unsigned char scope)
 255 {
 256         switch (scope) {
 257         case 0:
 258                 return "UNIVERSE";
 259         case 253:
 260                 return "LINK";
 261         }
 262
 263         return "";
 264 }
 265
 266 void __connman_ipconfig_add_route(struct connman_ipconfig *ipconfig,
 267                                 unsigned char scope, const char *destination,
 268                                                         const char *gateway)
 269 {
 270         if (scope == 0 && g_strcmp0(destination, "0.0.0.0") == 0) {
 271                 g_free(ipconfig->gateway);
 272                 ipconfig->gateway = g_strdup(gateway);
 273         }
 274
 275         connman_info("%s {add} route %s gw %s scope %u <%s>",
 276                                         ipconfig->interface, destination,
 277                                         gateway, scope, scope2str(scope));
 278 }
 279
 280 void __connman_ipconfig_del_route(struct connman_ipconfig *ipconfig,
 281                                 unsigned char scope, const char *destination,
 282                                                         const char *gateway)
 283 {
 284         if (scope == 0 && g_strcmp0(destination, "0.0.0.0") == 0) {
 285                 g_free(ipconfig->gateway);
 286                 ipconfig->gateway = NULL;
 287         }
 288
 289         connman_info("%s {del} route %s gw %s scope %u <%s>",
 290                                         ipconfig->interface, destination,
 291                                         gateway, scope, scope2str(scope));
 292 }
 293
 294 const char *__connman_ipconfig_method2string(enum connman_ipconfig_method method)
 295 {
 296         switch (method) {
 297         case CONNMAN_IPCONFIG_METHOD_UNKNOWN:
 298                 break;
 299         case CONNMAN_IPCONFIG_METHOD_OFF:
 300                 return "off";
 301         case CONNMAN_IPCONFIG_METHOD_STATIC:
 302                 return "static";
 303         case CONNMAN_IPCONFIG_METHOD_DHCP:
 304                 return "dhcp";
 305         }
 306
 307         return NULL;
 308 }
 309
 310 enum connman_ipconfig_method __connman_ipconfig_string2method(const char *method)
 311 {
 312         if (g_strcmp0(method, "off") == 0)
 313                 return CONNMAN_IPCONFIG_METHOD_OFF;
 314         else if (g_strcmp0(method, "static") == 0)
 315                 return CONNMAN_IPCONFIG_METHOD_STATIC;
 316         else if (g_strcmp0(method, "dhcp") == 0)
 317                 return CONNMAN_IPCONFIG_METHOD_DHCP;
 318         else
 319                 return CONNMAN_IPCONFIG_METHOD_UNKNOWN;
 320 }
 321
 322 static void append_variant(DBusMessageIter *iter, const char *prefix,
 323                                         const char *key, int type, void *val)
 324 {
 325         char *str;
 326
 327         if (prefix == NULL) {
 328                 connman_dbus_dict_append_variant(iter, key, type, val);
 329                 return;
 330         }
 331
 332         str = g_strdup_printf("%s%s", prefix, key);
 333         if (str != NULL)
 334                 connman_dbus_dict_append_variant(iter, str, type, val);
 335
 336         g_free(str);
 337 }
 338
 339 void __connman_ipconfig_append_ipv4(struct connman_ipconfig *ipconfig,
 340                                 DBusMessageIter *iter, const char *prefix)
 341 {
 342         const char *str;
 343
 344         str = __connman_ipconfig_method2string(ipconfig->method);
 345         if (str == NULL)
 346                 return;
 347
 348         append_variant(iter, prefix, "Method", DBUS_TYPE_STRING, &str);
 349 }
 350
 351 int __connman_ipconfig_set_ipv4(struct connman_ipconfig *ipconfig,
 352                                 const char *key, DBusMessageIter *value)
 353 {
 354         int type = dbus_message_iter_get_arg_type(value);
 355
 356         DBG("ipconfig %p key %s type %d", ipconfig, key, type);
 357
 358         if (g_strcmp0(key, "Method") == 0) {
 359                 const char *method;
 360
 361                 if (type != DBUS_TYPE_STRING)
 362                         return -EINVAL;
 363
 364                 dbus_message_iter_get_basic(value, &method);
 365
 366                 ipconfig->method = __connman_ipconfig_string2method(method);
 367         } else
 368                 return -EINVAL;
 369
 370         return 0;
 371 }
 372
 373 int __connman_ipconfig_load(struct connman_ipconfig *ipconfig,
 374                 GKeyFile *keyfile, const char *identifier, const char *prefix)
 375 {
 376         DBG("ipconfig %p identifier %s", ipconfig, identifier);
 377
 378         return 0;
 379 }
 380
 381 int __connman_ipconfig_save(struct connman_ipconfig *ipconfig,
 382                 GKeyFile *keyfile, const char *identifier, const char *prefix)
 383 {
 384         DBG("ipconfig %p identifier %s", ipconfig, identifier);
 385
 386         return 0;
 387 }
 388
 389 static GSList *driver_list = NULL;
 390
 391 static gint compare_priority(gconstpointer a, gconstpointer b)
 392 {
 393         const struct connman_ipconfig_driver *driver1 = a;
 394         const struct connman_ipconfig_driver *driver2 = b;
 395
 396         return driver2->priority - driver1->priority;
 397 }
 398
 399 /**
 400  * connman_ipconfig_driver_register:
 401  * @driver: IP configuration driver
 402  *
 403  * Register a new IP configuration driver
 404  *
 405  * Returns: %0 on success
 406  */
 407 int connman_ipconfig_driver_register(struct connman_ipconfig_driver *driver)
 408 {
 409         DBG("driver %p name %s", driver, driver->name);
 410
 411         driver_list = g_slist_insert_sorted(driver_list, driver,
 412                                                         compare_priority);
 413
 414         return 0;
 415 }
 416
 417 /**
 418  * connman_ipconfig_driver_unregister:
 419  * @driver: IP configuration driver
 420  *
 421  * Remove a previously registered IP configuration driver.
 422  */
 423 void connman_ipconfig_driver_unregister(struct connman_ipconfig_driver *driver)
 424 {
 425         DBG("driver %p name %s", driver, driver->name);
 426
 427         driver_list = g_slist_remove(driver_list, driver);
 428 }