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
  48         struct connman_ipconfig_ops *ops;
  49         void *ops_data;
  50
  51         enum connman_ipconfig_method method;
  52         GSList *address_list;
  53         char *gateway;
  54 };
  55
  56 static void free_address_list(struct connman_ipconfig *ipconfig)
  57 {
  58         GSList *list;
  59
  60         for (list = ipconfig->address_list; list; list = list->next) {
  61                 struct connman_ipaddress *ipaddress = list->data;
  62
  63                 g_free(ipaddress->address);
  64                 g_free(ipaddress);
  65                 list->data = NULL;
  66         }
  67
  68         g_slist_free(ipconfig->address_list);
  69         ipconfig->address_list = NULL;
  70 }
  71
  72 static struct connman_ipaddress *find_ipaddress(struct connman_ipconfig *ipconfig,
  73                                 unsigned char prefixlen, const char *address)
  74 {
  75         GSList *list;
  76
  77         for (list = ipconfig->address_list; list; list = list->next) {
  78                 struct connman_ipaddress *ipaddress = list->data;
  79
  80                 if (g_strcmp0(ipaddress->address, address) == 0 &&
  81                                         ipaddress->prefixlen == prefixlen)
  82                         return ipaddress;
  83         }
  84
  85         return NULL;
  86 }
  87
  88 /**
  89  * connman_ipconfig_create:
  90  *
  91  * Allocate a new ipconfig structure.
  92  *
  93  * Returns: a newly-allocated #connman_ipconfig structure
  94  */
  95 struct connman_ipconfig *connman_ipconfig_create(int index)
  96 {
  97         struct connman_ipconfig *ipconfig;
  98
  99         DBG("");
 100
 101         ipconfig = g_try_new0(struct connman_ipconfig, 1);
 102         if (ipconfig == NULL)
 103                 return NULL;
 104
 105         ipconfig->refcount = 1;
 106
 107         ipconfig->index = index;
 108         ipconfig->interface = connman_inet_ifname(index);
 109
 110         DBG("ipconfig %p", ipconfig);
 111
 112         connman_info("%s {create} index %d", ipconfig->interface,
 113                                                         ipconfig->index);
 114
 115         return ipconfig;
 116 }
 117
 118 /**
 119  * connman_ipconfig_ref:
 120  * @ipconfig: ipconfig structure
 121  *
 122  * Increase reference counter of ipconfig
 123  */
 124 struct connman_ipconfig *connman_ipconfig_ref(struct connman_ipconfig *ipconfig)
 125 {
 126         g_atomic_int_inc(&ipconfig->refcount);
 127
 128         return ipconfig;
 129 }
 130
 131 /**
 132  * connman_ipconfig_unref:
 133  * @ipconfig: ipconfig structure
 134  *
 135  * Decrease reference counter of ipconfig
 136  */
 137 void connman_ipconfig_unref(struct connman_ipconfig *ipconfig)
 138 {
 139         if (g_atomic_int_dec_and_test(&ipconfig->refcount) == TRUE) {
 140                 connman_info("%s {remove} index %d", ipconfig->interface,
 141                                                         ipconfig->index);
 142
 143                 g_free(ipconfig->gateway);
 144
 145                 free_address_list(ipconfig);
 146
 147                 g_free(ipconfig->interface);
 148                 g_free(ipconfig);
 149         }
 150 }
 151
 152 /**
 153  * connman_ipconfig_get_data:
 154  * @ipconfig: ipconfig structure
 155  *
 156  * Get private data pointer
 157  */
 158 void *connman_ipconfig_get_data(struct connman_ipconfig *ipconfig)
 159 {
 160         return ipconfig->ops_data;
 161 }
 162
 163 /**
 164  * connman_ipconfig_set_data:
 165  * @ipconfig: ipconfig structure
 166  * @data: data pointer
 167  *
 168  * Set private data pointer
 169  */
 170 void connman_ipconfig_set_data(struct connman_ipconfig *ipconfig, void *data)
 171 {
 172         ipconfig->ops_data = data;
 173 }
 174
 175 /**
 176  * connman_ipconfig_set_ops:
 177  * @ipconfig: ipconfig structure
 178  * @ops: operation callbacks
 179  *
 180  * Set the operation callbacks
 181  */
 182 void connman_ipconfig_set_ops(struct connman_ipconfig *ipconfig,
 183                                         struct connman_ipconfig_ops *ops)
 184 {
 185         ipconfig->ops = ops;
 186 }
 187
 188 /**
 189  * connman_ipconfig_set_method:
 190  * @ipconfig: ipconfig structure
 191  * @method: configuration method
 192  *
 193  * Set the configuration method
 194  */
 195 int connman_ipconfig_set_method(struct connman_ipconfig *ipconfig,
 196                                         enum connman_ipconfig_method method)
 197 {
 198         ipconfig->method = method;
 199
 200         return 0;
 201 }
 202
 203 int __connman_ipconfig_get_index(struct connman_ipconfig *ipconfig)
 204 {
 205         return ipconfig->index;
 206 }
 207
 208 unsigned short __connman_ipconfig_get_type(struct connman_ipconfig *ipconfig)
 209 {
 210         return ipconfig->type;
 211 }
 212
 213 unsigned int __connman_ipconfig_get_flags(struct connman_ipconfig *ipconfig)
 214 {
 215         return ipconfig->flags;
 216 }
 217
 218 const char *__connman_ipconfig_get_gateway(struct connman_ipconfig *ipconfig)
 219 {
 220         return ipconfig->gateway;
 221 }
 222
 223 void __connman_ipconfig_update_link(struct connman_ipconfig *ipconfig,
 224                                         unsigned flags, unsigned change)
 225 {
 226         GString *str;
 227
 228         if (flags == ipconfig->flags)
 229                 return;
 230
 231         ipconfig->flags = flags;
 232
 233         str = g_string_new(NULL);
 234         if (str == NULL)
 235                 return;
 236
 237         if (flags & IFF_UP)
 238                 g_string_append(str, "UP");
 239         else
 240                 g_string_append(str, "DOWN");
 241
 242         if (flags & IFF_RUNNING)
 243                 g_string_append(str, ",RUNNING");
 244
 245         if (flags & IFF_LOWER_UP)
 246                 g_string_append(str, ",LOWER_UP");
 247
 248         connman_info("%s {update} flags %u change %u <%s>",
 249                                 ipconfig->interface, flags, change, str->str);
 250
 251         g_string_free(str, TRUE);
 252 }
 253
 254 void __connman_ipconfig_add_address(struct connman_ipconfig *ipconfig,
 255                                 const char *label, unsigned char prefixlen,
 256                                 const char *address, const char *broadcast)
 257 {
 258         struct connman_ipaddress *ipaddress;
 259
 260         ipaddress = g_try_new0(struct connman_ipaddress, 1);
 261         if (ipaddress == NULL)
 262                 return;
 263
 264         ipaddress->prefixlen = prefixlen;
 265         ipaddress->address = g_strdup(address);
 266
 267         ipconfig->address_list = g_slist_append(ipconfig->address_list,
 268                                                                 ipaddress);
 269
 270         connman_info("%s {add} address %s/%u label %s", ipconfig->interface,
 271                                                 address, prefixlen, label);
 272 }
 273
 274 void __connman_ipconfig_del_address(struct connman_ipconfig *ipconfig,
 275                                 const char *label, unsigned char prefixlen,
 276                                 const char *address, const char *broadcast)
 277 {
 278         struct connman_ipaddress *ipaddress;
 279
 280         ipaddress = find_ipaddress(ipconfig, prefixlen, address);
 281         if (ipaddress == NULL)
 282                 return;
 283
 284         ipconfig->address_list = g_slist_remove(ipconfig->address_list,
 285                                                                 ipaddress);
 286
 287         g_free(ipaddress->address);
 288         g_free(ipaddress);
 289
 290         connman_info("%s {del} address %s/%u label %s", ipconfig->interface,
 291                                                 address, prefixlen, label);
 292 }
 293
 294 static const char *scope2str(unsigned char scope)
 295 {
 296         switch (scope) {
 297         case 0:
 298                 return "UNIVERSE";
 299         case 253:
 300                 return "LINK";
 301         }
 302
 303         return "";
 304 }
 305
 306 void __connman_ipconfig_add_route(struct connman_ipconfig *ipconfig,
 307                                 unsigned char scope, const char *destination,
 308                                                         const char *gateway)
 309 {
 310         if (scope == 0 && g_strcmp0(destination, "0.0.0.0") == 0) {
 311                 g_free(ipconfig->gateway);
 312                 ipconfig->gateway = g_strdup(gateway);
 313         }
 314
 315         connman_info("%s {add} route %s gw %s scope %u <%s>",
 316                                         ipconfig->interface, destination,
 317                                         gateway, scope, scope2str(scope));
 318 }
 319
 320 void __connman_ipconfig_del_route(struct connman_ipconfig *ipconfig,
 321                                 unsigned char scope, const char *destination,
 322                                                         const char *gateway)
 323 {
 324         if (scope == 0 && g_strcmp0(destination, "0.0.0.0") == 0) {
 325                 g_free(ipconfig->gateway);
 326                 ipconfig->gateway = NULL;
 327         }
 328
 329         connman_info("%s {del} route %s gw %s scope %u <%s>",
 330                                         ipconfig->interface, destination,
 331                                         gateway, scope, scope2str(scope));
 332 }
 333
 334 const char *__connman_ipconfig_method2string(enum connman_ipconfig_method method)
 335 {
 336         switch (method) {
 337         case CONNMAN_IPCONFIG_METHOD_UNKNOWN:
 338                 break;
 339         case CONNMAN_IPCONFIG_METHOD_OFF:
 340                 return "off";
 341         case CONNMAN_IPCONFIG_METHOD_STATIC:
 342                 return "static";
 343         case CONNMAN_IPCONFIG_METHOD_DHCP:
 344                 return "dhcp";
 345         }
 346
 347         return NULL;
 348 }
 349
 350 enum connman_ipconfig_method __connman_ipconfig_string2method(const char *method)
 351 {
 352         if (g_strcmp0(method, "off") == 0)
 353                 return CONNMAN_IPCONFIG_METHOD_OFF;
 354         else if (g_strcmp0(method, "static") == 0)
 355                 return CONNMAN_IPCONFIG_METHOD_STATIC;
 356         else if (g_strcmp0(method, "dhcp") == 0)
 357                 return CONNMAN_IPCONFIG_METHOD_DHCP;
 358         else
 359                 return CONNMAN_IPCONFIG_METHOD_UNKNOWN;
 360 }
 361
 362 static void append_variant(DBusMessageIter *iter, const char *prefix,
 363                                         const char *key, int type, void *val)
 364 {
 365         char *str;
 366
 367         if (prefix == NULL) {
 368                 connman_dbus_dict_append_variant(iter, key, type, val);
 369                 return;
 370         }
 371
 372         str = g_strdup_printf("%s%s", prefix, key);
 373         if (str != NULL)
 374                 connman_dbus_dict_append_variant(iter, str, type, val);
 375
 376         g_free(str);
 377 }
 378
 379 void __connman_ipconfig_append_ipv4(struct connman_ipconfig *ipconfig,
 380                                 DBusMessageIter *iter, const char *prefix)
 381 {
 382         const char *str;
 383
 384         str = __connman_ipconfig_method2string(ipconfig->method);
 385         if (str == NULL)
 386                 return;
 387
 388         append_variant(iter, prefix, "Method", DBUS_TYPE_STRING, &str);
 389 }
 390
 391 int __connman_ipconfig_set_ipv4(struct connman_ipconfig *ipconfig,
 392                                 const char *key, DBusMessageIter *value)
 393 {
 394         int type = dbus_message_iter_get_arg_type(value);
 395
 396         DBG("ipconfig %p key %s type %d", ipconfig, key, type);
 397
 398         if (g_strcmp0(key, "Method") == 0) {
 399                 const char *method;
 400
 401                 if (type != DBUS_TYPE_STRING)
 402                         return -EINVAL;
 403
 404                 dbus_message_iter_get_basic(value, &method);
 405
 406                 ipconfig->method = __connman_ipconfig_string2method(method);
 407         } else
 408                 return -EINVAL;
 409
 410         return 0;
 411 }
 412
 413 int __connman_ipconfig_load(struct connman_ipconfig *ipconfig,
 414                 GKeyFile *keyfile, const char *identifier, const char *prefix)
 415 {
 416         DBG("ipconfig %p identifier %s", ipconfig, identifier);
 417
 418         return 0;
 419 }
 420
 421 int __connman_ipconfig_save(struct connman_ipconfig *ipconfig,
 422                 GKeyFile *keyfile, const char *identifier, const char *prefix)
 423 {
 424         DBG("ipconfig %p identifier %s", ipconfig, identifier);
 425
 426         return 0;
 427 }
 428
 429 static GSList *driver_list = NULL;
 430
 431 static gint compare_priority(gconstpointer a, gconstpointer b)
 432 {
 433         const struct connman_ipconfig_driver *driver1 = a;
 434         const struct connman_ipconfig_driver *driver2 = b;
 435
 436         return driver2->priority - driver1->priority;
 437 }
 438
 439 /**
 440  * connman_ipconfig_driver_register:
 441  * @driver: IP configuration driver
 442  *
 443  * Register a new IP configuration driver
 444  *
 445  * Returns: %0 on success
 446  */
 447 int connman_ipconfig_driver_register(struct connman_ipconfig_driver *driver)
 448 {
 449         DBG("driver %p name %s", driver, driver->name);
 450
 451         driver_list = g_slist_insert_sorted(driver_list, driver,
 452                                                         compare_priority);
 453
 454         return 0;
 455 }
 456
 457 /**
 458  * connman_ipconfig_driver_unregister:
 459  * @driver: IP configuration driver
 460  *
 461  * Remove a previously registered IP configuration driver.
 462  */
 463 void connman_ipconfig_driver_unregister(struct connman_ipconfig_driver *driver)
 464 {
 465         DBG("driver %p name %s", driver, driver->name);
 466
 467         driver_list = g_slist_remove(driver_list, driver);
 468 }