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