diff options
Diffstat (limited to 'src/settings/nm-settings-connection.c')
| -rw-r--r-- | src/settings/nm-settings-connection.c | 288 |
1 files changed, 133 insertions, 155 deletions
diff --git a/src/settings/nm-settings-connection.c b/src/settings/nm-settings-connection.c index 4b3a56cd..6a208529 100644 --- a/src/settings/nm-settings-connection.c +++ b/src/settings/nm-settings-connection.c @@ -84,15 +84,27 @@ typedef struct { NMDBusManager *dbus_mgr; NMAgentManager *agent_mgr; + NMSessionMonitor *session_monitor; + guint session_changed_id; GSList *pending_auths; /* List of pending authentication requests */ - NMConnection *secrets; gboolean visible; /* Is this connection is visible by some session? */ - GSList *reqs; /* in-progress secrets requests */ - NMSessionMonitor *session_monitor; - guint session_changed_id; + /* Caches secrets from on-disk connections; were they not cached any + * call to nm_connection_clear_secrets() wipes them out and we'd have + * to re-read them from disk which defeats the purpose of having the + * connection in-memory at all. + */ + NMConnection *system_secrets; + + /* Caches secrets from agents during the activation process; if new system + * secrets are returned from an agent, they get written out to disk, + * triggering a re-read of the connection, which reads only system + * secrets, and would wipe out any agent-owned or not-saved secrets the + * agent also returned. + */ + NMConnection *agent_secrets; guint64 timestamp; /* Up-to-date timestamp of connection use */ GHashTable *seen_bssids; /* Up-to-date BSSIDs that's been seen for the connection */ @@ -294,57 +306,67 @@ nm_settings_connection_check_permission (NMSettingsConnection *self, /**************************************************************/ -static void -only_system_secrets_cb (NMSetting *setting, - const char *key, - const GValue *value, - GParamFlags flags, - gpointer user_data) +static gboolean +secrets_filter_cb (NMSetting *setting, + const char *secret, + NMSettingSecretFlags flags, + gpointer user_data) { - if (flags & NM_SETTING_PARAM_SECRET) { - NMSettingSecretFlags secret_flags = NM_SETTING_SECRET_FLAG_NONE; + NMSettingSecretFlags filter_flags = GPOINTER_TO_UINT (user_data); - /* VPNs are special; need to handle each secret separately */ - if (NM_IS_SETTING_VPN (setting) && !strcmp (key, NM_SETTING_VPN_SECRETS)) { - GHashTableIter iter; - const char *secret_name = NULL; + /* Returns TRUE to remove the secret */ - g_hash_table_iter_init (&iter, (GHashTable *) g_value_get_boxed (value)); - while (g_hash_table_iter_next (&iter, (gpointer *) &secret_name, NULL)) { - secret_flags = NM_SETTING_SECRET_FLAG_NONE; - nm_setting_get_secret_flags (setting, secret_name, &secret_flags, NULL); - if (secret_flags != NM_SETTING_SECRET_FLAG_NONE) - nm_setting_vpn_remove_secret (NM_SETTING_VPN (setting), secret_name); - } - } else { - nm_setting_get_secret_flags (setting, key, &secret_flags, NULL); - if (secret_flags != NM_SETTING_SECRET_FLAG_NONE) - g_object_set (G_OBJECT (setting), key, NULL, NULL); - } - } + /* Can't use bitops with SECRET_FLAG_NONE so handle that specifically */ + if ( (flags == NM_SETTING_SECRET_FLAG_NONE) + && (filter_flags == NM_SETTING_SECRET_FLAG_NONE)) + return FALSE; + + /* Otherwise if the secret has at least one of the desired flags keep it */ + return (flags & filter_flags) ? FALSE : TRUE; } static void -update_secrets_cache (NMSettingsConnection *self) +update_system_secrets_cache (NMSettingsConnection *self) { NMSettingsConnectionPrivate *priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self); - if (priv->secrets) - g_object_unref (priv->secrets); - priv->secrets = nm_connection_duplicate (NM_CONNECTION (self)); + if (priv->system_secrets) + g_object_unref (priv->system_secrets); + priv->system_secrets = nm_connection_duplicate (NM_CONNECTION (self)); /* Clear out non-system-owned and not-saved secrets */ - nm_connection_for_each_setting_value (priv->secrets, only_system_secrets_cb, NULL); + nm_connection_clear_secrets_with_flags (priv->system_secrets, + secrets_filter_cb, + GUINT_TO_POINTER (NM_SETTING_SECRET_FLAG_NONE)); } -static gboolean -clear_system_secrets (GHashTableIter *iter, - NMSettingSecretFlags flags, - gpointer user_data) +static void +update_agent_secrets_cache (NMSettingsConnection *self, NMConnection *new) { - if (flags == NM_SETTING_SECRET_FLAG_NONE) - g_hash_table_iter_remove (iter); - return TRUE; + NMSettingsConnectionPrivate *priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self); + NMSettingSecretFlags filter_flags = NM_SETTING_SECRET_FLAG_NOT_SAVED | NM_SETTING_SECRET_FLAG_AGENT_OWNED; + + if (priv->agent_secrets) + g_object_unref (priv->agent_secrets); + priv->agent_secrets = nm_connection_duplicate (new ? new : NM_CONNECTION (self)); + + /* Clear out non-system-owned secrets */ + nm_connection_clear_secrets_with_flags (priv->agent_secrets, + secrets_filter_cb, + GUINT_TO_POINTER (filter_flags)); +} + +static void +secrets_cleared_cb (NMSettingsConnection *self) +{ + NMSettingsConnectionPrivate *priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self); + + /* Clear agent secrets when connection's secrets are cleared since agent + * secrets are transient. + */ + if (priv->agent_secrets) + g_object_unref (priv->agent_secrets); + priv->agent_secrets = NULL; } /* Update the settings of this connection to match that of 'new', taking care to @@ -356,7 +378,7 @@ nm_settings_connection_replace_settings (NMSettingsConnection *self, GError **error) { NMSettingsConnectionPrivate *priv; - GHashTable *new_settings, *transient_secrets; + GHashTable *new_settings, *hash = NULL; gboolean success = FALSE; g_return_val_if_fail (self != NULL, FALSE); @@ -366,37 +388,29 @@ nm_settings_connection_replace_settings (NMSettingsConnection *self, priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self); - /* Replacing the settings might replace transient secrets, such as when - * a user agent returns secrets, which might trigger the connection to be - * written out, which triggers an inotify event to re-read and update the - * connection, which, if we're not careful, could wipe out the transient - * secrets the user agent just sent us. Basically, only - * nm_connection_clear_secrets() should wipe out transient secrets but - * re-reading a connection from on-disk and updating our in-memory copy - * should not. Thus we preserve non-system-owned secrets here. - */ - transient_secrets = nm_connection_to_hash (NM_CONNECTION (self), NM_SETTING_HASH_FLAG_ONLY_SECRETS); - if (transient_secrets) - for_each_secret (NM_CONNECTION (self), transient_secrets, clear_system_secrets, NULL); - new_settings = nm_connection_to_hash (new, NM_SETTING_HASH_FLAG_ALL); g_assert (new_settings); if (nm_connection_replace_settings (NM_CONNECTION (self), new_settings, error)) { - /* Copy the connection to keep its secrets around even if NM - * calls nm_connection_clear_secrets(). + /* Cache the just-updated system secrets in case something calls + * nm_connection_clear_secrets() and clears them. */ - update_secrets_cache (self); + update_system_secrets_cache (self); + success = TRUE; - /* And add the transient secrets back */ - if (transient_secrets) - nm_connection_update_secrets (NM_CONNECTION (self), NULL, transient_secrets, NULL); + /* Add agent and always-ask secrets back; they won't necessarily be + * in the replacement connection data if it was eg reread from disk. + */ + if (priv->agent_secrets) { + hash = nm_connection_to_hash (priv->agent_secrets, NM_SETTING_HASH_FLAG_ONLY_SECRETS); + if (hash) { + success = nm_connection_update_secrets (NM_CONNECTION (self), NULL, hash, error); + g_hash_table_destroy (hash); + } + } nm_settings_connection_recheck_visibility (self); - success = TRUE; } g_hash_table_destroy (new_settings); - if (transient_secrets) - g_hash_table_destroy (transient_secrets); return success; } @@ -719,7 +733,7 @@ agent_secrets_done_cb (NMAgentManager *manager, /* Update the connection with our existing secrets from backing storage */ nm_connection_clear_secrets (NM_CONNECTION (self)); - hash = nm_connection_to_hash (priv->secrets, NM_SETTING_HASH_FLAG_ONLY_SECRETS); + hash = nm_connection_to_hash (priv->system_secrets, NM_SETTING_HASH_FLAG_ONLY_SECRETS); if (!hash || nm_connection_update_secrets (NM_CONNECTION (self), setting_name, hash, &local)) { /* Update the connection with the agent's secrets; by this point if any * system-owned secrets exist in 'secrets' the agent that provided them @@ -730,7 +744,8 @@ agent_secrets_done_cb (NMAgentManager *manager, /* Now that all secrets are updated, copy and cache new secrets, * then save them to backing storage. */ - update_secrets_cache (self); + update_system_secrets_cache (self); + update_agent_secrets_cache (self, NULL); /* Only save secrets to backing storage if the agent returned any * new system secrets. If it didn't, then the secrets are agent- @@ -807,11 +822,9 @@ nm_settings_connection_get_secrets (NMSettingsConnection *self, guint32 call_id = 0; /* Use priv->secrets to work around the fact that nm_connection_clear_secrets() - * will clear secrets on this object's settings. priv->secrets should be - * a complete copy of this object and kept in sync by - * nm_settings_connection_replace_settings(). + * will clear secrets on this object's settings. */ - if (!priv->secrets) { + if (!priv->system_secrets) { g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION, "%s.%d - Internal error; secrets cache invalid.", __FILE__, __LINE__); @@ -826,7 +839,7 @@ nm_settings_connection_get_secrets (NMSettingsConnection *self, return 0; } - existing_secrets = nm_connection_to_hash (priv->secrets, NM_SETTING_HASH_FLAG_ONLY_SECRETS); + existing_secrets = nm_connection_to_hash (priv->system_secrets, NM_SETTING_HASH_FLAG_ONLY_SECRETS); call_id = nm_agent_manager_get_secrets (priv->agent_mgr, NM_CONNECTION (self), filter_by_uid, @@ -1084,47 +1097,40 @@ impl_settings_connection_get_settings (NMSettingsConnection *self, auth_start (self, context, NULL, get_settings_auth_cb, NULL); } +typedef struct { + DBusGMethodInvocation *context; + NMAgentManager *agent_mgr; + gulong sender_uid; +} UpdateInfo; + static void -con_update_cb (NMSettingsConnection *connection, +con_update_cb (NMSettingsConnection *self, GError *error, gpointer user_data) { - DBusGMethodInvocation *context = user_data; + UpdateInfo *info = user_data; + NMConnection *for_agent; if (error) - dbus_g_method_return_error (context, error); - else - dbus_g_method_return (context); -} - -static void -secrets_filter_cb (NMSetting *setting, - const char *key, - const GValue *value, - GParamFlags flags, - gpointer user_data) -{ - NMSettingSecretFlags filter_flags = GPOINTER_TO_UINT (user_data); - NMSettingSecretFlags secret_flags = NM_SETTING_SECRET_FLAG_NONE; - const char *secret_name = NULL; - GHashTableIter iter; + dbus_g_method_return_error (info->context, error); + else { + /* Dupe the connection so we can clear out non-agent-owned secrets, + * as agent-owned secrets are the only ones we send back be saved. + * Only send secrets to agents of the same UID that called update too. + */ + for_agent = nm_connection_duplicate (NM_CONNECTION (self)); + nm_connection_clear_secrets_with_flags (for_agent, + secrets_filter_cb, + GUINT_TO_POINTER (NM_SETTING_SECRET_FLAG_AGENT_OWNED)); + nm_agent_manager_save_secrets (info->agent_mgr, for_agent, TRUE, info->sender_uid); + g_object_unref (for_agent); - if (flags & NM_SETTING_PARAM_SECRET) { - if (NM_IS_SETTING_VPN (setting) && !strcmp (key, NM_SETTING_VPN_SECRETS)) { - /* VPNs are special; need to handle each secret separately */ - g_hash_table_iter_init (&iter, (GHashTable *) g_value_get_boxed (value)); - while (g_hash_table_iter_next (&iter, (gpointer) &secret_name, NULL)) { - secret_flags = NM_SETTING_SECRET_FLAG_NONE; - nm_setting_get_secret_flags (setting, secret_name, &secret_flags, NULL); - if (!(secret_flags & filter_flags)) - nm_setting_vpn_remove_secret (NM_SETTING_VPN (setting), secret_name); - } - } else { - nm_setting_get_secret_flags (setting, key, &secret_flags, NULL); - if (!(secret_flags & filter_flags)) - g_object_set (G_OBJECT (setting), key, NULL, NULL); - } + dbus_g_method_return (info->context); } + + g_object_unref (info->agent_mgr); + memset (info, 0, sizeof (*info)); + g_free (info); } static void @@ -1136,54 +1142,27 @@ update_auth_cb (NMSettingsConnection *self, { NMSettingsConnectionPrivate *priv = NM_SETTINGS_CONNECTION_GET_PRIVATE (self); NMConnection *new_settings = data; - NMConnection *for_agent, *dup; - NMSettingSecretFlags filter_flags; - GHashTable *hash; - GError *local = NULL; + UpdateInfo *info; if (error) dbus_g_method_return_error (context, error); else { - /* Cache the new secrets since they may get overwritten by the replace - * when transient secrets are copied back. + info = g_malloc0 (sizeof (*info)); + info->context = context; + info->agent_mgr = g_object_ref (priv->agent_mgr); + info->sender_uid = sender_uid; + + /* Cache the new secrets from the agent, as stuff like inotify-triggered + * changes to connection's backing config files will blow them away if + * they're in the main connection. */ - dup = nm_connection_duplicate (new_settings); + update_agent_secrets_cache (self, new_settings); /* Update and commit our settings. */ nm_settings_connection_replace_and_commit (self, - new_settings, - con_update_cb, - context); - - /* Copy new agent secrets back to the connection */ - filter_flags = NM_SETTING_SECRET_FLAG_AGENT_OWNED | NM_SETTING_SECRET_FLAG_NOT_SAVED; - nm_connection_for_each_setting_value (dup, - secrets_filter_cb, - GUINT_TO_POINTER (filter_flags)); - hash = nm_connection_to_hash (dup, NM_SETTING_HASH_FLAG_ONLY_SECRETS); - g_object_unref (dup); - - if (hash) { - if (!nm_connection_update_secrets (NM_CONNECTION (self), NULL, hash, &local)) { - nm_log_warn (LOGD_SETTINGS, "Failed to update connection secrets: (%d) %s", - local ? local->code : -1, - local && local->message ? local->message : "(unknown)"); - g_clear_error (&local); - } - g_hash_table_destroy (hash); - } - - /* Dupe the connection and clear out non-agent-owned secrets so we can - * send the agent-owned ones to agents to be saved. Only send them to - * agents of the same UID as the Update() request sender. - */ - for_agent = nm_connection_duplicate (NM_CONNECTION (self)); - filter_flags = NM_SETTING_SECRET_FLAG_AGENT_OWNED; - nm_connection_for_each_setting_value (for_agent, - secrets_filter_cb, - GUINT_TO_POINTER (filter_flags)); - nm_agent_manager_save_secrets (priv->agent_mgr, for_agent, TRUE, sender_uid); - g_object_unref (for_agent); + new_settings, + con_update_cb, + info); } g_object_unref (new_settings); @@ -1345,16 +1324,11 @@ dbus_get_agent_secrets_cb (NMSettingsConnection *self, if (error) dbus_g_method_return_error (context, error); else { - /* The connection's secrets will have been updated by the agent manager, - * so we want to refresh the secrets cache. Note that we will never save - * new secrets to backing storage here because D-Bus initated requests will - * never ask for completely new secrets from agents. Thus system-owned - * secrets should not have changed from backing storage. We also don't - * send agent-owned secrets back out to be saved since we assume the agent - * that provided the secrets saved them itself. + /* Return secrets from agent and backing storage to the D-Bus caller; + * nm_settings_connection_get_secrets() will have updated itself with + * secrets from backing storage and those returned from the agent + * by the time we get here. */ - update_secrets_cache (self); - hash = nm_connection_to_hash (NM_CONNECTION (self), NM_SETTING_HASH_FLAG_ONLY_SECRETS); if (!hash) hash = g_hash_table_new (NULL, NULL); @@ -1726,6 +1700,8 @@ nm_settings_connection_init (NMSettingsConnection *self) priv->agent_mgr = nm_agent_manager_get (); priv->seen_bssids = g_hash_table_new_full (mac_hash, mac_equal, g_free, g_free); + + g_signal_connect (self, "secrets-cleared", G_CALLBACK (secrets_cleared_cb), NULL); } static void @@ -1739,8 +1715,10 @@ dispose (GObject *object) goto out; priv->disposed = TRUE; - if (priv->secrets) - g_object_unref (priv->secrets); + if (priv->system_secrets) + g_object_unref (priv->system_secrets); + if (priv->agent_secrets) + g_object_unref (priv->agent_secrets); /* Cancel PolicyKit requests */ for (iter = priv->pending_auths; iter; iter = g_slist_next (iter)) |