mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager
synced 2024-07-25 04:04:36 +00:00
643 lines
19 KiB
C
643 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2011 - 2015 Red Hat, Inc.
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*/
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#include "nm-default.h"
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#include "nm-firewall-manager.h"
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#include "nm-glib-aux/nm-dbus-aux.h"
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#include "c-list/src/c-list.h"
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#include "NetworkManagerUtils.h"
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#include "nm-dbus-manager.h"
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#define FIREWALL_DBUS_SERVICE "org.fedoraproject.FirewallD1"
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#define FIREWALL_DBUS_PATH "/org/fedoraproject/FirewallD1"
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#define FIREWALL_DBUS_INTERFACE_ZONE "org.fedoraproject.FirewallD1.zone"
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/*****************************************************************************/
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enum {
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STATE_CHANGED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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typedef struct {
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GDBusConnection *dbus_connection;
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GCancellable *get_name_owner_cancellable;
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CList pending_calls;
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guint name_owner_changed_id;
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bool dbus_inited:1;
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bool running:1;
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} NMFirewallManagerPrivate;
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struct _NMFirewallManager {
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GObject parent;
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NMFirewallManagerPrivate _priv;
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};
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struct _NMFirewallManagerClass {
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GObjectClass parent;
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};
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G_DEFINE_TYPE (NMFirewallManager, nm_firewall_manager, G_TYPE_OBJECT)
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#define NM_FIREWALL_MANAGER_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMFirewallManager, NM_IS_FIREWALL_MANAGER)
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/*****************************************************************************/
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NM_DEFINE_SINGLETON_GETTER (NMFirewallManager, nm_firewall_manager_get, NM_TYPE_FIREWALL_MANAGER);
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/*****************************************************************************/
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typedef enum {
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OPS_TYPE_ADD = 1,
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OPS_TYPE_CHANGE,
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OPS_TYPE_REMOVE,
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} OpsType;
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struct _NMFirewallManagerCallId {
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CList lst;
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NMFirewallManager *self;
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char *iface;
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NMFirewallManagerAddRemoveCallback callback;
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gpointer user_data;
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union {
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struct {
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GCancellable *cancellable;
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GVariant *arg;
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} dbus;
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struct {
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guint id;
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} idle;
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};
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OpsType ops_type;
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bool is_idle:1;
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};
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/*****************************************************************************/
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static const char *
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_ops_type_to_string (OpsType ops_type)
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{
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switch (ops_type) {
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case OPS_TYPE_ADD: return "add";
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case OPS_TYPE_REMOVE: return "remove";
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case OPS_TYPE_CHANGE: return "change";
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}
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nm_assert_not_reached ();
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return NULL;
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}
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#define _NMLOG_DOMAIN LOGD_FIREWALL
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#define _NMLOG_PREFIX_NAME "firewall"
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#define _NMLOG(level, call_id, ...) \
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G_STMT_START { \
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if (nm_logging_enabled ((level), (_NMLOG_DOMAIN))) { \
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NMFirewallManagerCallId *_call_id = (call_id); \
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char _prefix_name[30]; \
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char _prefix_info[100]; \
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\
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_nm_log ((level), (_NMLOG_DOMAIN), 0, NULL, NULL, \
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"%s: %s" _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \
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(self) != singleton_instance \
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? ({ \
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g_snprintf (_prefix_name, \
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sizeof (_prefix_name), \
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"%s["NM_HASH_OBFUSCATE_PTR_FMT"]", \
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""_NMLOG_PREFIX_NAME,\
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NM_HASH_OBFUSCATE_PTR (self)); \
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_prefix_name; \
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}) \
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: _NMLOG_PREFIX_NAME, \
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_call_id \
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? ({ \
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g_snprintf (_prefix_info, \
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sizeof (_prefix_info), \
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"["NM_HASH_OBFUSCATE_PTR_FMT",%s%s:%s%s%s]: ", \
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NM_HASH_OBFUSCATE_PTR (_call_id), \
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_ops_type_to_string (_call_id->ops_type), \
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_call_id->is_idle ? "*" : "", \
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NM_PRINT_FMT_QUOTE_STRING (_call_id->iface)); \
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_prefix_info; \
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}) \
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: "" \
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_NM_UTILS_MACRO_REST(__VA_ARGS__)); \
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} \
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} G_STMT_END
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/*****************************************************************************/
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static gboolean
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_get_running (NMFirewallManagerPrivate *priv)
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{
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/* when starting, we need to asynchronously check whether there is
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* a name owner. During that time we optimistically assume that the
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* service is indeed running. That is the time when we queue the
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* requests, and they will be started once the get-name-owner call
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* returns. */
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return priv->running
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|| ( priv->dbus_connection
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&& !priv->dbus_inited);
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}
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gboolean
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nm_firewall_manager_get_running (NMFirewallManager *self)
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{
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g_return_val_if_fail (NM_IS_FIREWALL_MANAGER (self), FALSE);
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return _get_running (NM_FIREWALL_MANAGER_GET_PRIVATE (self));
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}
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/*****************************************************************************/
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static NMFirewallManagerCallId *
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_cb_info_create (NMFirewallManager *self,
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OpsType ops_type,
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const char *iface,
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const char *zone,
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NMFirewallManagerAddRemoveCallback callback,
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gpointer user_data)
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{
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NMFirewallManagerPrivate *priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
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NMFirewallManagerCallId *call_id;
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call_id = g_slice_new0 (NMFirewallManagerCallId);
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call_id->self = g_object_ref (self);
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call_id->ops_type = ops_type;
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call_id->iface = g_strdup (iface);
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call_id->callback = callback;
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call_id->user_data = user_data;
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if (_get_running (priv)) {
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call_id->is_idle = FALSE;
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call_id->dbus.arg = g_variant_new ("(ss)", zone ?: "", iface);
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} else
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call_id->is_idle = TRUE;
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c_list_link_tail (&priv->pending_calls, &call_id->lst);
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return call_id;
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}
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static void
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_cb_info_complete (NMFirewallManagerCallId *call_id,
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GError *error)
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{
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c_list_unlink (&call_id->lst);
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if (call_id->callback)
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call_id->callback (call_id->self, call_id, error, call_id->user_data);
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if (call_id->is_idle)
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nm_clear_g_source (&call_id->idle.id);
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else {
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nm_g_variant_unref (call_id->dbus.arg);
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nm_clear_g_cancellable (&call_id->dbus.cancellable);
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}
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g_free (call_id->iface);
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g_object_unref (call_id->self);
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nm_g_slice_free (call_id);
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}
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static gboolean
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_handle_idle_cb (gpointer user_data)
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{
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NMFirewallManager *self;
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NMFirewallManagerCallId *call_id = user_data;
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nm_assert (call_id);
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nm_assert (NM_IS_FIREWALL_MANAGER (call_id->self));
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nm_assert (call_id->is_idle);
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nm_assert (c_list_contains (&NM_FIREWALL_MANAGER_GET_PRIVATE (call_id->self)->pending_calls, &call_id->lst));
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self = call_id->self;
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_LOGD (call_id, "complete: fake success");
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call_id->idle.id = 0;
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_cb_info_complete (call_id, NULL);
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return G_SOURCE_REMOVE;
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}
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static gboolean
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_handle_idle_start (NMFirewallManager *self,
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NMFirewallManagerCallId *call_id)
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{
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if (!call_id->callback) {
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/* if the user did not provide a callback and firewalld is not running,
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* there is no point in scheduling an idle-request to fake success. Just
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* return right away. */
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_LOGD (call_id, "complete: drop request simulating success");
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_cb_info_complete (call_id, NULL);
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return FALSE;
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}
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call_id->idle.id = g_idle_add (_handle_idle_cb, call_id);
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return TRUE;
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}
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static void
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_handle_dbus_cb (GObject *source,
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GAsyncResult *result,
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gpointer user_data)
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{
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NMFirewallManager *self;
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NMFirewallManagerCallId *call_id;
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gs_free_error GError *error = NULL;
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gs_unref_variant GVariant *ret = NULL;
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ret = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source), result, &error);
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if ( !ret
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&& nm_utils_error_is_cancelled (error))
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return;
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call_id = user_data;
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nm_assert (call_id);
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nm_assert (NM_IS_FIREWALL_MANAGER (call_id->self));
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nm_assert (!call_id->is_idle);
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nm_assert (c_list_contains (&NM_FIREWALL_MANAGER_GET_PRIVATE (call_id->self)->pending_calls, &call_id->lst));
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self = call_id->self;
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if (error) {
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const char *non_error = NULL;
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g_dbus_error_strip_remote_error (error);
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switch (call_id->ops_type) {
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case OPS_TYPE_ADD:
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case OPS_TYPE_CHANGE:
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non_error = "ZONE_ALREADY_SET";
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break;
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case OPS_TYPE_REMOVE:
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non_error = "UNKNOWN_INTERFACE";
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break;
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}
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if ( error->message
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&& non_error
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&& g_str_has_prefix (error->message, non_error)
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&& NM_IN_SET (error->message[strlen (non_error)], '\0', ':')) {
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_LOGD (call_id, "complete: request failed with a non-error (%s)", error->message);
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/* The operation failed with an error reason that we don't want
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* to propagate. Instead, signal success. */
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g_clear_error (&error);
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} else
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_LOGW (call_id, "complete: request failed (%s)", error->message);
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} else
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_LOGD (call_id, "complete: success");
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g_clear_object (&call_id->dbus.cancellable);
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_cb_info_complete (call_id, error);
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}
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static void
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_handle_dbus_start (NMFirewallManager *self,
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NMFirewallManagerCallId *call_id)
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{
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NMFirewallManagerPrivate *priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
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const char *dbus_method = NULL;
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GVariant *arg;
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nm_assert (call_id);
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nm_assert (priv->running);
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nm_assert (!call_id->is_idle);
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nm_assert (c_list_contains (&priv->pending_calls, &call_id->lst));
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switch (call_id->ops_type) {
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case OPS_TYPE_ADD:
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dbus_method = "addInterface";
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break;
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case OPS_TYPE_CHANGE:
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dbus_method = "changeZone";
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break;
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case OPS_TYPE_REMOVE:
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dbus_method = "removeInterface";
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break;
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}
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nm_assert (dbus_method);
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arg = g_steal_pointer (&call_id->dbus.arg);
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nm_assert (arg && g_variant_is_floating (arg));
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nm_assert (!call_id->dbus.cancellable);
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call_id->dbus.cancellable = g_cancellable_new ();
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g_dbus_connection_call (priv->dbus_connection,
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FIREWALL_DBUS_SERVICE,
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FIREWALL_DBUS_PATH,
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FIREWALL_DBUS_INTERFACE_ZONE,
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dbus_method,
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arg,
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NULL,
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G_DBUS_CALL_FLAGS_NONE,
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10000,
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call_id->dbus.cancellable,
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_handle_dbus_cb,
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call_id);
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}
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static NMFirewallManagerCallId *
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_start_request (NMFirewallManager *self,
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OpsType ops_type,
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const char *iface,
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const char *zone,
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NMFirewallManagerAddRemoveCallback callback,
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gpointer user_data)
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{
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NMFirewallManagerPrivate *priv;
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NMFirewallManagerCallId *call_id;
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g_return_val_if_fail (NM_IS_FIREWALL_MANAGER (self), NULL);
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g_return_val_if_fail (iface && *iface, NULL);
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priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
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call_id = _cb_info_create (self, ops_type, iface, zone, callback, user_data);
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_LOGD (call_id, "firewall zone %s %s:%s%s%s%s",
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_ops_type_to_string (call_id->ops_type),
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iface,
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NM_PRINT_FMT_QUOTED (zone, "\"", zone, "\"", "default"),
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call_id->is_idle
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? " (not running, simulate success)"
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: (!priv->running
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? " (waiting to initialize)"
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: ""));
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if (!call_id->is_idle) {
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if (priv->running)
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_handle_dbus_start (self, call_id);
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if (!call_id->callback) {
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/* if the user did not provide a callback, the call_id is useless.
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* Especially, the user cannot use the call-id to cancel the request,
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* because he cannot know whether the request is still pending.
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*
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* Hence, returning %NULL doesn't mean that the request could not be started
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* (this function never fails and always starts a request). */
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return NULL;
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}
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} else {
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if (!_handle_idle_start (self, call_id)) {
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/* if the user did not provide a callback and firewalld is not running,
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* there is no point in scheduling an idle-request to fake success. Just
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* return right away. */
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return NULL;
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}
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}
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return call_id;
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}
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NMFirewallManagerCallId *
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nm_firewall_manager_add_or_change_zone (NMFirewallManager *self,
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const char *iface,
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const char *zone,
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gboolean add, /* TRUE == add, FALSE == change */
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NMFirewallManagerAddRemoveCallback callback,
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gpointer user_data)
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{
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return _start_request (self,
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add ? OPS_TYPE_ADD : OPS_TYPE_CHANGE,
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iface,
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zone,
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callback,
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user_data);
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}
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NMFirewallManagerCallId *
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nm_firewall_manager_remove_from_zone (NMFirewallManager *self,
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const char *iface,
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const char *zone,
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NMFirewallManagerAddRemoveCallback callback,
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gpointer user_data)
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{
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return _start_request (self,
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OPS_TYPE_REMOVE,
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iface,
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zone,
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callback,
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user_data);
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}
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void
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nm_firewall_manager_cancel_call (NMFirewallManagerCallId *call_id)
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{
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NMFirewallManager *self;
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NMFirewallManagerPrivate *priv;
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gs_free_error GError *error = NULL;
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g_return_if_fail (call_id);
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g_return_if_fail (NM_IS_FIREWALL_MANAGER (call_id->self));
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g_return_if_fail (!c_list_is_empty (&call_id->lst));
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self = call_id->self;
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priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
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nm_assert (c_list_contains (&priv->pending_calls, &call_id->lst));
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nm_utils_error_set_cancelled (&error, FALSE, "NMFirewallManager");
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_LOGD (call_id, "complete: cancel (%s)", error->message);
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_cb_info_complete (call_id, error);
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}
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/*****************************************************************************/
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static void
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name_owner_changed (NMFirewallManager *self,
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const char *owner)
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{
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_nm_unused gs_unref_object NMFirewallManager *self_keep_alive = g_object_ref (self);
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NMFirewallManagerPrivate *priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
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gboolean was_running;
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gboolean now_running;
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gboolean just_initied;
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owner = nm_str_not_empty (owner);
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if (!owner)
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_LOGT (NULL, "D-Bus name for firewalld has no owner (firewall stopped)");
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else
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_LOGT (NULL, "D-Bus name for firewalld has owner %s (firewall started)", owner);
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was_running = _get_running (priv);
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just_initied = !priv->dbus_inited;
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priv->dbus_inited = TRUE;
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priv->running = !!owner;
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now_running = _get_running (priv);
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if (just_initied) {
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NMFirewallManagerCallId *call_id_safe;
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NMFirewallManagerCallId *call_id;
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/* We kick of the requests that we have pending. Note that this is
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* entirely asynchronous and also we don't invoke any callbacks for
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* the user.
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* Even _handle_idle_start() just schedules an idle handler. That is,
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* because we don't want to callback to the user before emitting the
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* DISCONNECTED signal below. Also, emitting callbacks means the user
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* can call back to modify the list of pending-calls and we'd have
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* to handle reentrancy. */
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c_list_for_each_entry_safe (call_id, call_id_safe, &priv->pending_calls, lst) {
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nm_assert (!call_id->is_idle);
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nm_assert (call_id->dbus.arg);
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if (priv->running) {
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_LOGD (call_id, "initalizing: make D-Bus call");
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_handle_dbus_start (self, call_id);
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} else {
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/* we don't want to invoke callbacks to the user right away. That is because
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* the user might schedule/cancel more calls, which messes up the order.
|
|
*
|
|
* Instead, convert the pending calls to idle requests... */
|
|
nm_clear_pointer (&call_id->dbus.arg, g_variant_unref);
|
|
call_id->is_idle = TRUE;
|
|
_LOGD (call_id, "initializing: fake success on idle");
|
|
_handle_idle_start (self, call_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (was_running != now_running)
|
|
g_signal_emit (self, signals[STATE_CHANGED], 0, FALSE);
|
|
}
|
|
|
|
static void
|
|
name_owner_changed_cb (GDBusConnection *connection,
|
|
const char *sender_name,
|
|
const char *object_path,
|
|
const char *interface_name,
|
|
const char *signal_name,
|
|
GVariant *parameters,
|
|
gpointer user_data)
|
|
{
|
|
NMFirewallManager *self = user_data;
|
|
const char *new_owner;
|
|
|
|
if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(sss)")))
|
|
return;
|
|
|
|
g_variant_get (parameters,
|
|
"(&s&s&s)",
|
|
NULL,
|
|
NULL,
|
|
&new_owner);
|
|
|
|
name_owner_changed (self, new_owner);
|
|
}
|
|
|
|
static void
|
|
get_name_owner_cb (const char *name_owner,
|
|
GError *error,
|
|
gpointer user_data)
|
|
{
|
|
NMFirewallManager *self;
|
|
NMFirewallManagerPrivate *priv;
|
|
|
|
if ( !name_owner
|
|
&& g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
|
|
return;
|
|
|
|
self = user_data;
|
|
priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
|
|
|
|
g_clear_object (&priv->get_name_owner_cancellable);
|
|
|
|
name_owner_changed (self, name_owner);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static void
|
|
nm_firewall_manager_init (NMFirewallManager *self)
|
|
{
|
|
NMFirewallManagerPrivate *priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
|
|
|
|
c_list_init (&priv->pending_calls);
|
|
|
|
priv->dbus_connection = nm_g_object_ref (NM_MAIN_DBUS_CONNECTION_GET);
|
|
|
|
if (!priv->dbus_connection) {
|
|
_LOGD (NULL, "no D-Bus connection");
|
|
return;
|
|
}
|
|
|
|
priv->name_owner_changed_id = nm_dbus_connection_signal_subscribe_name_owner_changed (priv->dbus_connection,
|
|
FIREWALL_DBUS_SERVICE,
|
|
name_owner_changed_cb,
|
|
self,
|
|
NULL);
|
|
|
|
priv->get_name_owner_cancellable = g_cancellable_new ();
|
|
nm_dbus_connection_call_get_name_owner (priv->dbus_connection,
|
|
FIREWALL_DBUS_SERVICE,
|
|
-1,
|
|
priv->get_name_owner_cancellable,
|
|
get_name_owner_cb,
|
|
self);
|
|
}
|
|
|
|
static void
|
|
dispose (GObject *object)
|
|
{
|
|
NMFirewallManager *self = NM_FIREWALL_MANAGER (object);
|
|
NMFirewallManagerPrivate *priv = NM_FIREWALL_MANAGER_GET_PRIVATE (self);
|
|
|
|
/* as every pending operation takes a reference to the manager,
|
|
* we don't expect pending operations at this point. */
|
|
nm_assert (c_list_is_empty (&priv->pending_calls));
|
|
|
|
nm_clear_g_dbus_connection_signal (priv->dbus_connection,
|
|
&priv->name_owner_changed_id);
|
|
|
|
nm_clear_g_cancellable (&priv->get_name_owner_cancellable);
|
|
|
|
G_OBJECT_CLASS (nm_firewall_manager_parent_class)->dispose (object);
|
|
|
|
g_clear_object (&priv->dbus_connection);
|
|
}
|
|
|
|
static void
|
|
nm_firewall_manager_class_init (NMFirewallManagerClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
|
|
object_class->dispose = dispose;
|
|
|
|
signals[STATE_CHANGED] =
|
|
g_signal_new (NM_FIREWALL_MANAGER_STATE_CHANGED,
|
|
G_OBJECT_CLASS_TYPE (object_class),
|
|
G_SIGNAL_RUN_FIRST,
|
|
0,
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__BOOLEAN,
|
|
G_TYPE_NONE, 1,
|
|
G_TYPE_BOOLEAN /* initialized_now */);
|
|
}
|