src/settings/plugins/ifcfg-rh/nm-ifcfg-connection.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
   2 /* NetworkManager system settings service
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Copyright (C) 2008 - 2011 Red Hat, Inc.
  19  */
  20
  21 #include "nm-default.h"
  22
  23 #include <string.h>
  24
  25 #include <glib/gstdio.h>
  26
  27 #include "nm-dbus-interface.h"
  28 #include "nm-setting-connection.h"
  29 #include "nm-setting-wired.h"
  30 #include "nm-setting-wireless.h"
  31 #include "nm-setting-gsm.h"
  32 #include "nm-setting-cdma.h"
  33 #include "nm-setting-pppoe.h"
  34 #include "nm-setting-wireless-security.h"
  35 #include "nm-setting-8021x.h"
  36 #include "nm-platform.h"
  37
  38 #include "common.h"
  39 #include "nm-config.h"
  40 #include "nm-ifcfg-connection.h"
  41 #include "reader.h"
  42 #include "writer.h"
  43 #include "nm-inotify-helper.h"
  44 #include "utils.h"
  45
  46 G_DEFINE_TYPE (NMIfcfgConnection, nm_ifcfg_connection, NM_TYPE_SETTINGS_CONNECTION)
  47
  48 #define NM_IFCFG_CONNECTION_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_IFCFG_CONNECTION, NMIfcfgConnectionPrivate))
  49
  50 typedef struct {
  51         gulong ih_event_id;
  52
  53         int file_wd;
  54
  55         char *keyfile;
  56         int keyfile_wd;
  57
  58         char *routefile;
  59         int routefile_wd;
  60
  61         char *route6file;
  62         int route6file_wd;
  63
  64         char *unmanaged_spec;
  65         char *unrecognized_spec;
  66
  67         gulong devtimeout_link_changed_handler;
  68         guint devtimeout_timeout_id;
  69
  70         NMInotifyHelper *inotify_helper;
  71 } NMIfcfgConnectionPrivate;
  72
  73 enum {
  74         PROP_0,
  75         PROP_UNMANAGED_SPEC,
  76         PROP_UNRECOGNIZED_SPEC,
  77         LAST_PROP
  78 };
  79
  80 /* Signals */
  81 enum {
  82         IFCFG_CHANGED,
  83         LAST_SIGNAL
  84 };
  85
  86 static guint signals[LAST_SIGNAL] = { 0 };
  87
  88 static NMInotifyHelper *
  89 _get_inotify_helper (NMIfcfgConnectionPrivate *priv)
  90 {
  91         if (!priv->inotify_helper)
  92                 priv->inotify_helper = g_object_ref (nm_inotify_helper_get ());
  93         return priv->inotify_helper;
  94 }
  95
  96 static gboolean
  97 devtimeout_ready (gpointer user_data)
  98 {
  99         NMIfcfgConnection *self = user_data;
 100         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 101
 102         priv->devtimeout_timeout_id = 0;
 103         nm_settings_connection_set_ready (NM_SETTINGS_CONNECTION (self), TRUE);
 104         return FALSE;
 105 }
 106
 107 static void
 108 link_changed (NMPlatform *platform, NMPObjectType *obj_type, int ifindex, const NMPlatformLink *link,
 109               NMPlatformSignalChangeType change_type,
 110               NMConnection *self)
 111 {
 112         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 113         const char *ifname;
 114
 115         ifname = nm_connection_get_interface_name (self);
 116         if (g_strcmp0 (link->name, ifname) != 0)
 117                 return;
 118
 119         /* Shouldn't happen, but... */
 120         if (change_type == NM_PLATFORM_SIGNAL_REMOVED)
 121                 return;
 122
 123         nm_log_info (LOGD_SETTINGS, "Device %s appeared; connection '%s' now ready",
 124                      ifname, nm_connection_get_id (self));
 125
 126         g_signal_handler_disconnect (platform, priv->devtimeout_link_changed_handler);
 127         priv->devtimeout_link_changed_handler = 0;
 128         g_source_remove (priv->devtimeout_timeout_id);
 129
 130         /* Don't declare the connection ready right away, since NMManager may not have
 131          * started processing the device yet.
 132          */
 133         priv->devtimeout_timeout_id = g_idle_add (devtimeout_ready, self);
 134 }
 135
 136 static gboolean
 137 devtimeout_expired (gpointer user_data)
 138 {
 139         NMIfcfgConnection *self = user_data;
 140         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 141
 142         nm_log_info (LOGD_SETTINGS, "Device for connection '%s' did not appear before timeout",
 143                      nm_connection_get_id (NM_CONNECTION (self)));
 144
 145         g_signal_handler_disconnect (NM_PLATFORM_GET, priv->devtimeout_link_changed_handler);
 146         priv->devtimeout_link_changed_handler = 0;
 147         priv->devtimeout_timeout_id = 0;
 148
 149         nm_settings_connection_set_ready (NM_SETTINGS_CONNECTION (self), TRUE);
 150         return FALSE;
 151 }
 152
 153 static void
 154 nm_ifcfg_connection_check_devtimeout (NMIfcfgConnection *self)
 155 {
 156         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 157         NMSettingConnection *s_con;
 158         const char *ifname;
 159         const char *filename;
 160         guint devtimeout;
 161         const NMPlatformLink *pllink;
 162
 163         s_con = nm_connection_get_setting_connection (NM_CONNECTION (self));
 164
 165         if (!nm_setting_connection_get_autoconnect (s_con))
 166                 return;
 167         ifname = nm_setting_connection_get_interface_name (s_con);
 168         if (!ifname)
 169                 return;
 170         filename = nm_settings_connection_get_filename (NM_SETTINGS_CONNECTION (self));
 171         if (!filename)
 172                 return;
 173
 174         pllink = nm_platform_link_get_by_ifname (NM_PLATFORM_GET, ifname);
 175         if (pllink && pllink->initialized)
 176                 return;
 177
 178         devtimeout = devtimeout_from_file (filename);
 179         if (!devtimeout)
 180                 return;
 181
 182         /* ONBOOT=yes, DEVICE and DEVTIMEOUT are set, but device is not present */
 183         nm_settings_connection_set_ready (NM_SETTINGS_CONNECTION (self), FALSE);
 184
 185         nm_log_info (LOGD_SETTINGS, "Waiting %u seconds for %s to appear for connection '%s'",
 186                      devtimeout, ifname, nm_connection_get_id (NM_CONNECTION (self)));
 187
 188         priv->devtimeout_link_changed_handler =
 189                 g_signal_connect (NM_PLATFORM_GET, NM_PLATFORM_SIGNAL_LINK_CHANGED,
 190                                   G_CALLBACK (link_changed), self);
 191         priv->devtimeout_timeout_id = g_timeout_add_seconds (devtimeout, devtimeout_expired, self);
 192 }
 193
 194 static void
 195 files_changed_cb (NMInotifyHelper *ih,
 196                   struct inotify_event *evt,
 197                   const char *path,
 198                   gpointer user_data)
 199 {
 200         NMIfcfgConnection *self = NM_IFCFG_CONNECTION (user_data);
 201         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 202
 203         if (   (evt->wd != priv->file_wd)
 204             && (evt->wd != priv->keyfile_wd)
 205             && (evt->wd != priv->routefile_wd)
 206             && (evt->wd != priv->route6file_wd))
 207                 return;
 208
 209         /* push the event up to the plugin */
 210         g_signal_emit (self, signals[IFCFG_CHANGED], 0);
 211 }
 212
 213 NMIfcfgConnection *
 214 nm_ifcfg_connection_new (NMConnection *source,
 215                          const char *full_path,
 216                          GError **error,
 217                          gboolean *out_ignore_error)
 218 {
 219         GObject *object;
 220         NMConnection *tmp;
 221         char *unhandled_spec = NULL;
 222         const char *unmanaged_spec = NULL, *unrecognized_spec = NULL;
 223         gboolean update_unsaved = TRUE;
 224
 225         g_assert (source || full_path);
 226
 227         if (out_ignore_error)
 228                 *out_ignore_error = FALSE;
 229
 230         /* If we're given a connection already, prefer that instead of re-reading */
 231         if (source)
 232                 tmp = g_object_ref (source);
 233         else {
 234                 tmp = connection_from_file (full_path,
 235                                             &unhandled_spec,
 236                                             error,
 237                                             out_ignore_error);
 238                 if (!tmp)
 239                         return NULL;
 240
 241                 /* If we just read the connection from disk, it's clearly not Unsaved */
 242                 update_unsaved = FALSE;
 243         }
 244
 245         if (unhandled_spec && g_str_has_prefix (unhandled_spec, "unmanaged:"))
 246                 unmanaged_spec = unhandled_spec + strlen ("unmanaged:");
 247         else if (unhandled_spec && g_str_has_prefix (unhandled_spec, "unrecognized:"))
 248                 unrecognized_spec = unhandled_spec + strlen ("unrecognized:");
 249
 250         object = (GObject *) g_object_new (NM_TYPE_IFCFG_CONNECTION,
 251                                            NM_SETTINGS_CONNECTION_FILENAME, full_path,
 252                                            NM_IFCFG_CONNECTION_UNMANAGED_SPEC, unmanaged_spec,
 253                                            NM_IFCFG_CONNECTION_UNRECOGNIZED_SPEC, unrecognized_spec,
 254                                            NULL);
 255         /* Update our settings with what was read from the file */
 256         if (nm_settings_connection_replace_settings (NM_SETTINGS_CONNECTION (object),
 257                                                      tmp,
 258                                                      update_unsaved,
 259                                                      NULL,
 260                                                      error))
 261                 nm_ifcfg_connection_check_devtimeout (NM_IFCFG_CONNECTION (object));
 262         else
 263                 g_clear_object (&object);
 264
 265         g_object_unref (tmp);
 266         g_free (unhandled_spec);
 267         return (NMIfcfgConnection *) object;
 268 }
 269
 270 static void
 271 path_watch_stop (NMIfcfgConnection *self)
 272 {
 273         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 274         NMInotifyHelper *ih;
 275
 276         ih = _get_inotify_helper (priv);
 277
 278         nm_clear_g_signal_handler (ih, &priv->ih_event_id);
 279
 280         if (priv->file_wd >= 0) {
 281                 nm_inotify_helper_remove_watch (ih, priv->file_wd);
 282                 priv->file_wd = -1;
 283         }
 284
 285         g_free (priv->keyfile);
 286         priv->keyfile = NULL;
 287         if (priv->keyfile_wd >= 0) {
 288                 nm_inotify_helper_remove_watch (ih, priv->keyfile_wd);
 289                 priv->keyfile_wd = -1;
 290         }
 291
 292         g_free (priv->routefile);
 293         priv->routefile = NULL;
 294         if (priv->routefile_wd >= 0) {
 295                 nm_inotify_helper_remove_watch (ih, priv->routefile_wd);
 296                 priv->routefile_wd = -1;
 297         }
 298
 299         g_free (priv->route6file);
 300         priv->route6file = NULL;
 301         if (priv->route6file_wd >= 0) {
 302                 nm_inotify_helper_remove_watch (ih, priv->route6file_wd);
 303                 priv->route6file_wd = -1;
 304         }
 305 }
 306
 307 static void
 308 filename_changed (GObject *object,
 309                   GParamSpec *pspec,
 310                   gpointer user_data)
 311 {
 312         NMIfcfgConnection *self = NM_IFCFG_CONNECTION (object);
 313         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (self);
 314         const char *ifcfg_path;
 315
 316         path_watch_stop (self);
 317
 318         ifcfg_path = nm_settings_connection_get_filename (NM_SETTINGS_CONNECTION (self));
 319         if (!ifcfg_path)
 320                 return;
 321
 322         priv->keyfile = utils_get_keys_path (ifcfg_path);
 323         priv->routefile = utils_get_route_path (ifcfg_path);
 324         priv->route6file = utils_get_route6_path (ifcfg_path);
 325
 326         if (nm_config_get_monitor_connection_files (nm_config_get ())) {
 327                 NMInotifyHelper *ih;
 328
 329                 ih = _get_inotify_helper (priv);
 330
 331                 priv->ih_event_id = g_signal_connect (ih, "event", G_CALLBACK (files_changed_cb), self);
 332                 priv->file_wd = nm_inotify_helper_add_watch (ih, ifcfg_path);
 333                 priv->keyfile_wd = nm_inotify_helper_add_watch (ih, priv->keyfile);
 334                 priv->routefile_wd = nm_inotify_helper_add_watch (ih, priv->routefile);
 335                 priv->route6file_wd = nm_inotify_helper_add_watch (ih, priv->route6file);
 336         }
 337 }
 338
 339 const char *
 340 nm_ifcfg_connection_get_unmanaged_spec (NMIfcfgConnection *self)
 341 {
 342         g_return_val_if_fail (NM_IS_IFCFG_CONNECTION (self), NULL);
 343
 344         return NM_IFCFG_CONNECTION_GET_PRIVATE (self)->unmanaged_spec;
 345 }
 346
 347 const char *
 348 nm_ifcfg_connection_get_unrecognized_spec (NMIfcfgConnection *self)
 349 {
 350         g_return_val_if_fail (NM_IS_IFCFG_CONNECTION (self), NULL);
 351
 352         return NM_IFCFG_CONNECTION_GET_PRIVATE (self)->unrecognized_spec;
 353 }
 354
 355 static void
 356 replace_and_commit (NMSettingsConnection *connection,
 357                     NMConnection *new_connection,
 358                     NMSettingsConnectionCommitFunc callback,
 359                     gpointer user_data)
 360 {
 361         const char *filename;
 362         GError *error = NULL;
 363
 364         filename = nm_settings_connection_get_filename (connection);
 365         if (filename && utils_has_complex_routes (filename)) {
 366                 if (callback) {
 367                         error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED,
 368                                                      "Cannot modify a connection that has an associated 'rule-' or 'rule6-' file");
 369                         callback (connection, error, user_data);
 370                         g_clear_error (&error);
 371                 }
 372                 return;
 373         }
 374
 375         NM_SETTINGS_CONNECTION_CLASS (nm_ifcfg_connection_parent_class)->replace_and_commit (connection, new_connection, callback, user_data);
 376 }
 377
 378 static void
 379 commit_changes (NMSettingsConnection *connection,
 380                 NMSettingsConnectionCommitReason commit_reason,
 381                 NMSettingsConnectionCommitFunc callback,
 382                 gpointer user_data)
 383 {
 384         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (connection);
 385         GError *error = NULL;
 386         NMConnection *reread;
 387         gboolean same = FALSE, success = FALSE;
 388         char *ifcfg_path = NULL;
 389         const char *filename;
 390
 391         /* To ensure we don't rewrite files that are only changed from other
 392          * processes on-disk, read the existing connection back in and only rewrite
 393          * it if it's really changed.
 394          */
 395         filename = nm_settings_connection_get_filename (connection);
 396         if (filename) {
 397                 reread = connection_from_file (filename, NULL, NULL, NULL);
 398                 if (reread) {
 399                         same = nm_connection_compare (NM_CONNECTION (connection),
 400                                                       reread,
 401                                                       NM_SETTING_COMPARE_FLAG_IGNORE_AGENT_OWNED_SECRETS |
 402                                                          NM_SETTING_COMPARE_FLAG_IGNORE_NOT_SAVED_SECRETS);
 403                         g_object_unref (reread);
 404
 405                         /* Don't bother writing anything out if in-memory and on-disk data are the same */
 406                         if (same) {
 407                                 /* But chain up to parent to handle success - emits updated signal */
 408                                 NM_SETTINGS_CONNECTION_CLASS (nm_ifcfg_connection_parent_class)->commit_changes (connection, commit_reason, callback, user_data);
 409                                 return;
 410                         }
 411                 }
 412
 413                 success = writer_update_connection (NM_CONNECTION (connection),
 414                                                     IFCFG_DIR,
 415                                                     filename,
 416                                                     priv->keyfile,
 417                                                     &error);
 418         } else {
 419                 success = writer_new_connection (NM_CONNECTION (connection),
 420                                                  IFCFG_DIR,
 421                                                  &ifcfg_path,
 422                                                  &error);
 423                 if (success) {
 424                         nm_settings_connection_set_filename (connection, ifcfg_path);
 425                         g_free (ifcfg_path);
 426                 }
 427         }
 428
 429         if (success) {
 430                 /* Chain up to parent to handle success */
 431                 NM_SETTINGS_CONNECTION_CLASS (nm_ifcfg_connection_parent_class)->commit_changes (connection, commit_reason, callback, user_data);
 432         } else {
 433                 /* Otherwise immediate error */
 434                 callback (connection, error, user_data);
 435                 g_error_free (error);
 436         }
 437 }
 438
 439 static void
 440 do_delete (NMSettingsConnection *connection,
 441                NMSettingsConnectionDeleteFunc callback,
 442                gpointer user_data)
 443 {
 444         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (connection);
 445         const char *filename;
 446
 447         filename = nm_settings_connection_get_filename (connection);
 448         if (filename) {
 449                 g_unlink (filename);
 450                 if (priv->keyfile)
 451                         g_unlink (priv->keyfile);
 452                 if (priv->routefile)
 453                         g_unlink (priv->routefile);
 454                 if (priv->route6file)
 455                         g_unlink (priv->route6file);
 456         }
 457
 458         NM_SETTINGS_CONNECTION_CLASS (nm_ifcfg_connection_parent_class)->delete (connection, callback, user_data);
 459 }
 460
 461 /* GObject */
 462
 463 static void
 464 nm_ifcfg_connection_init (NMIfcfgConnection *connection)
 465 {
 466         g_signal_connect (connection, "notify::" NM_SETTINGS_CONNECTION_FILENAME,
 467                           G_CALLBACK (filename_changed), NULL);
 468 }
 469
 470 static void
 471 set_property (GObject *object, guint prop_id,
 472                     const GValue *value, GParamSpec *pspec)
 473 {
 474         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (object);
 475
 476         switch (prop_id) {
 477         case PROP_UNMANAGED_SPEC:
 478                 priv->unmanaged_spec = g_value_dup_string (value);
 479                 break;
 480         case PROP_UNRECOGNIZED_SPEC:
 481                 priv->unrecognized_spec = g_value_dup_string (value);
 482                 break;
 483         default:
 484                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 485                 break;
 486         }
 487 }
 488
 489 static void
 490 get_property (GObject *object, guint prop_id,
 491                     GValue *value, GParamSpec *pspec)
 492 {
 493         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (object);
 494
 495         switch (prop_id) {
 496         case PROP_UNMANAGED_SPEC:
 497                 g_value_set_string (value, priv->unmanaged_spec);
 498                 break;
 499         case PROP_UNRECOGNIZED_SPEC:
 500                 g_value_set_string (value, priv->unrecognized_spec);
 501                 break;
 502         default:
 503                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 504                 break;
 505         }
 506 }
 507
 508 static void
 509 dispose (GObject *object)
 510 {
 511         NMIfcfgConnectionPrivate *priv = NM_IFCFG_CONNECTION_GET_PRIVATE (object);
 512
 513         path_watch_stop (NM_IFCFG_CONNECTION (object));
 514
 515         nm_clear_g_signal_handler (NM_PLATFORM_GET, &priv->devtimeout_link_changed_handler);
 516         nm_clear_g_source (&priv->devtimeout_timeout_id);
 517
 518         g_clear_object (&priv->inotify_helper);
 519
 520         g_clear_pointer (&priv->unmanaged_spec, g_free);
 521         g_clear_pointer (&priv->unrecognized_spec, g_free);
 522
 523         G_OBJECT_CLASS (nm_ifcfg_connection_parent_class)->dispose (object);
 524 }
 525
 526 static void
 527 nm_ifcfg_connection_class_init (NMIfcfgConnectionClass *ifcfg_connection_class)
 528 {
 529         GObjectClass *object_class = G_OBJECT_CLASS (ifcfg_connection_class);
 530         NMSettingsConnectionClass *settings_class = NM_SETTINGS_CONNECTION_CLASS (ifcfg_connection_class);
 531
 532         g_type_class_add_private (ifcfg_connection_class, sizeof (NMIfcfgConnectionPrivate));
 533
 534         /* Virtual methods */
 535         object_class->set_property = set_property;
 536         object_class->get_property = get_property;
 537         object_class->dispose      = dispose;
 538         settings_class->delete = do_delete;
 539         settings_class->replace_and_commit = replace_and_commit;
 540         settings_class->commit_changes = commit_changes;
 541
 542         /* Properties */
 543         g_object_class_install_property
 544                 (object_class, PROP_UNMANAGED_SPEC,
 545                  g_param_spec_string (NM_IFCFG_CONNECTION_UNMANAGED_SPEC, "", "",
 546                                       NULL,
 547                                       G_PARAM_READWRITE |
 548                                       G_PARAM_STATIC_STRINGS));
 549         g_object_class_install_property
 550                 (object_class, PROP_UNRECOGNIZED_SPEC,
 551                  g_param_spec_string (NM_IFCFG_CONNECTION_UNRECOGNIZED_SPEC, "", "",
 552                                       NULL,
 553                                       G_PARAM_READWRITE |
 554                                       G_PARAM_STATIC_STRINGS));
 555
 556         signals[IFCFG_CHANGED] =
 557                 g_signal_new ("ifcfg-changed",
 558                               G_OBJECT_CLASS_TYPE (object_class),
 559                               G_SIGNAL_RUN_LAST,
 560                               0, NULL, NULL,
 561                               g_cclosure_marshal_VOID__VOID,
 562                               G_TYPE_NONE, 0);
 563 }
 564