/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* NetworkManager -- Network link manager * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Copyright 2011 - 2015 Red Hat, Inc. */ #include "nm-default.h" #include "nm-device-bridge.h" #include #include "NetworkManagerUtils.h" #include "nm-device-private.h" #include "platform/nm-platform.h" #include "nm-device-factory.h" #include "nm-core-internal.h" #include "introspection/org.freedesktop.NetworkManager.Device.Bridge.h" #include "nm-device-logging.h" _LOG_DECLARE_SELF(NMDeviceBridge); /*****************************************************************************/ struct _NMDeviceBridge { NMDevice parent; }; struct _NMDeviceBridgeClass { NMDeviceClass parent; }; G_DEFINE_TYPE (NMDeviceBridge, nm_device_bridge, NM_TYPE_DEVICE) /*****************************************************************************/ const NMBtVTableNetworkServer *nm_bt_vtable_network_server = NULL; /*****************************************************************************/ static NMDeviceCapabilities get_generic_capabilities (NMDevice *dev) { return NM_DEVICE_CAP_CARRIER_DETECT | NM_DEVICE_CAP_IS_SOFTWARE; } static gboolean check_connection_available (NMDevice *device, NMConnection *connection, NMDeviceCheckConAvailableFlags flags, const char *specific_object) { NMSettingBluetooth *s_bt; if (!NM_DEVICE_CLASS (nm_device_bridge_parent_class)->check_connection_available (device, connection, flags, specific_object)) return FALSE; s_bt = _nm_connection_get_setting_bluetooth_for_nap (connection); if (s_bt) { return nm_bt_vtable_network_server && nm_bt_vtable_network_server->is_available (nm_bt_vtable_network_server, nm_setting_bluetooth_get_bdaddr (s_bt)); } return TRUE; } static gboolean check_connection_compatible (NMDevice *device, NMConnection *connection) { NMSettingBridge *s_bridge; const char *mac_address; if (!NM_DEVICE_CLASS (nm_device_bridge_parent_class)->check_connection_compatible (device, connection)) return FALSE; s_bridge = nm_connection_get_setting_bridge (connection); if (!s_bridge) return FALSE; if (!nm_connection_is_type (connection, NM_SETTING_BRIDGE_SETTING_NAME)) { if ( nm_connection_is_type (connection, NM_SETTING_BLUETOOTH_SETTING_NAME) && _nm_connection_get_setting_bluetooth_for_nap (connection)) { /* a bluetooth NAP connection is handled by the bridge */ } else return FALSE; } mac_address = nm_setting_bridge_get_mac_address (s_bridge); if (mac_address && nm_device_is_real (device)) { const char *hw_addr; hw_addr = nm_device_get_hw_address (device); if (!hw_addr || !nm_utils_hwaddr_matches (hw_addr, -1, mac_address, -1)) return FALSE; } return TRUE; } static gboolean complete_connection (NMDevice *device, NMConnection *connection, const char *specific_object, const GSList *existing_connections, GError **error) { NMSettingBridge *s_bridge; nm_utils_complete_generic (nm_device_get_platform (device), connection, NM_SETTING_BRIDGE_SETTING_NAME, existing_connections, NULL, _("Bridge connection"), "bridge", TRUE); s_bridge = nm_connection_get_setting_bridge (connection); if (!s_bridge) { s_bridge = (NMSettingBridge *) nm_setting_bridge_new (); nm_connection_add_setting (connection, NM_SETTING (s_bridge)); } return TRUE; } /*****************************************************************************/ typedef struct { const char *name; const char *sysname; gboolean default_if_zero; gboolean user_hz_compensate; } Option; static const Option master_options[] = { { NM_SETTING_BRIDGE_STP, "stp_state", FALSE, FALSE }, { NM_SETTING_BRIDGE_PRIORITY, "priority", TRUE, FALSE }, { NM_SETTING_BRIDGE_FORWARD_DELAY, "forward_delay", TRUE, TRUE }, { NM_SETTING_BRIDGE_HELLO_TIME, "hello_time", TRUE, TRUE }, { NM_SETTING_BRIDGE_MAX_AGE, "max_age", TRUE, TRUE }, { NM_SETTING_BRIDGE_AGEING_TIME, "ageing_time", TRUE, TRUE }, { NM_SETTING_BRIDGE_GROUP_FORWARD_MASK, "group_fwd_mask", TRUE, FALSE }, { NM_SETTING_BRIDGE_MULTICAST_SNOOPING, "multicast_snooping", FALSE, FALSE }, { NULL, NULL } }; static const Option slave_options[] = { { NM_SETTING_BRIDGE_PORT_PRIORITY, "priority", TRUE, FALSE }, { NM_SETTING_BRIDGE_PORT_PATH_COST, "path_cost", TRUE, FALSE }, { NM_SETTING_BRIDGE_PORT_HAIRPIN_MODE, "hairpin_mode", FALSE, FALSE }, { NULL, NULL } }; static void commit_option (NMDevice *device, NMSetting *setting, const Option *option, gboolean slave) { int ifindex = nm_device_get_ifindex (device); GParamSpec *pspec; GValue val = G_VALUE_INIT; guint32 uval = 0; gs_free char *value = NULL; g_assert (setting); pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (setting), option->name); g_assert (pspec); /* Get the property's value */ g_value_init (&val, G_PARAM_SPEC_VALUE_TYPE (pspec)); g_object_get_property ((GObject *) setting, option->name, &val); if (G_VALUE_HOLDS_BOOLEAN (&val)) uval = g_value_get_boolean (&val) ? 1 : 0; else if (G_VALUE_HOLDS_UINT (&val)) { uval = g_value_get_uint (&val); /* zero means "unspecified" for some NM properties but isn't in the * allowed kernel range, so reset the property to the default value. */ if (option->default_if_zero && uval == 0) { g_value_unset (&val); g_value_init (&val, G_PARAM_SPEC_VALUE_TYPE (pspec)); g_param_value_set_default (pspec, &val); uval = g_value_get_uint (&val); } /* Linux kernel bridge interfaces use 'centiseconds' for time-based values. * In reality it's not centiseconds, but depends on HZ and USER_HZ, which * is almost always works out to be a multiplier of 100, so we can assume * centiseconds. See clock_t_to_jiffies(). */ if (option->user_hz_compensate) uval *= 100; } else g_assert_not_reached (); g_value_unset (&val); value = g_strdup_printf ("%u", uval); if (slave) nm_platform_sysctl_slave_set_option (nm_device_get_platform (device), ifindex, option->sysname, value); else nm_platform_sysctl_master_set_option (nm_device_get_platform (device), ifindex, option->sysname, value); } static void commit_master_options (NMDevice *device, NMSettingBridge *setting) { const Option *option; NMSetting *s = NM_SETTING (setting); for (option = master_options; option->name; option++) commit_option (device, s, option, FALSE); } static void commit_slave_options (NMDevice *device, NMSettingBridgePort *setting) { const Option *option; NMSetting *s, *s_clear = NULL; if (setting) s = NM_SETTING (setting); else s = s_clear = nm_setting_bridge_port_new (); for (option = slave_options; option->name; option++) commit_option (device, s, option, TRUE); g_clear_object (&s_clear); } static void update_connection (NMDevice *device, NMConnection *connection) { NMDeviceBridge *self = NM_DEVICE_BRIDGE (device); NMSettingBridge *s_bridge = nm_connection_get_setting_bridge (connection); int ifindex = nm_device_get_ifindex (device); const Option *option; if (!s_bridge) { s_bridge = (NMSettingBridge *) nm_setting_bridge_new (); nm_connection_add_setting (connection, (NMSetting *) s_bridge); } for (option = master_options; option->name; option++) { gs_free char *str = nm_platform_sysctl_master_get_option (nm_device_get_platform (device), ifindex, option->sysname); int value; if (str) { value = strtol (str, NULL, 10); /* See comments in set_sysfs_uint() about centiseconds. */ if (option->user_hz_compensate) value /= 100; g_object_set (s_bridge, option->name, value, NULL); } else _LOGW (LOGD_BRIDGE, "failed to read bridge setting '%s'", option->sysname); } } static gboolean master_update_slave_connection (NMDevice *device, NMDevice *slave, NMConnection *connection, GError **error) { NMDeviceBridge *self = NM_DEVICE_BRIDGE (device); NMSettingConnection *s_con; NMSettingBridgePort *s_port; int ifindex_slave = nm_device_get_ifindex (slave); const char *iface = nm_device_get_iface (device); const Option *option; g_return_val_if_fail (ifindex_slave > 0, FALSE); s_con = nm_connection_get_setting_connection (connection); s_port = nm_connection_get_setting_bridge_port (connection); if (!s_port) { s_port = (NMSettingBridgePort *) nm_setting_bridge_port_new (); nm_connection_add_setting (connection, NM_SETTING (s_port)); } for (option = slave_options; option->name; option++) { gs_free char *str = nm_platform_sysctl_slave_get_option (nm_device_get_platform (device), ifindex_slave, option->sysname); int value; if (str) { value = strtol (str, NULL, 10); /* See comments in set_sysfs_uint() about centiseconds. */ if (option->user_hz_compensate) value /= 100; g_object_set (s_port, option->name, value, NULL); } else _LOGW (LOGD_BRIDGE, "failed to read bridge port setting '%s'", option->sysname); } g_object_set (s_con, NM_SETTING_CONNECTION_MASTER, iface, NM_SETTING_CONNECTION_SLAVE_TYPE, NM_SETTING_BRIDGE_SETTING_NAME, NULL); return TRUE; } static NMActStageReturn act_stage1_prepare (NMDevice *device, NMDeviceStateReason *out_failure_reason) { NMActStageReturn ret; NMConnection *connection = nm_device_get_applied_connection (device); g_return_val_if_fail (connection, NM_ACT_STAGE_RETURN_FAILURE); ret = NM_DEVICE_CLASS (nm_device_bridge_parent_class)->act_stage1_prepare (device, out_failure_reason); if (ret != NM_ACT_STAGE_RETURN_SUCCESS) return ret; if (!nm_device_hw_addr_set_cloned (device, nm_device_get_applied_connection (device), FALSE)) return NM_ACT_STAGE_RETURN_FAILURE; commit_master_options (device, nm_connection_get_setting_bridge (connection)); return NM_ACT_STAGE_RETURN_SUCCESS; } static NMActStageReturn act_stage2_config (NMDevice *device, NMDeviceStateReason *out_failure_reason) { NMConnection *connection; NMSettingBluetooth *s_bt; connection = nm_device_get_applied_connection (device); s_bt = _nm_connection_get_setting_bluetooth_for_nap (connection); if (s_bt) { if ( !nm_bt_vtable_network_server || !nm_bt_vtable_network_server->register_bridge (nm_bt_vtable_network_server, nm_setting_bluetooth_get_bdaddr (s_bt), device)) { /* The HCI we could use is no longer present. */ *out_failure_reason = NM_DEVICE_STATE_REASON_REMOVED; return NM_ACT_STAGE_RETURN_FAILURE; } } return NM_ACT_STAGE_RETURN_SUCCESS; } static void deactivate (NMDevice *device) { if (nm_bt_vtable_network_server) { /* always call unregister. It does nothing if the device * isn't registered as a hotspot bridge. */ nm_bt_vtable_network_server->unregister_bridge (nm_bt_vtable_network_server, device); } } static gboolean enslave_slave (NMDevice *device, NMDevice *slave, NMConnection *connection, gboolean configure) { NMDeviceBridge *self = NM_DEVICE_BRIDGE (device); if (configure) { if (!nm_platform_link_enslave (nm_device_get_platform (device), nm_device_get_ip_ifindex (device), nm_device_get_ip_ifindex (slave))) return FALSE; commit_slave_options (slave, nm_connection_get_setting_bridge_port (connection)); _LOGI (LOGD_BRIDGE, "attached bridge port %s", nm_device_get_ip_iface (slave)); } else { _LOGI (LOGD_BRIDGE, "bridge port %s was attached", nm_device_get_ip_iface (slave)); } return TRUE; } static void release_slave (NMDevice *device, NMDevice *slave, gboolean configure) { NMDeviceBridge *self = NM_DEVICE_BRIDGE (device); gboolean success; if (configure) { success = nm_platform_link_release (nm_device_get_platform (device), nm_device_get_ip_ifindex (device), nm_device_get_ip_ifindex (slave)); if (success) { _LOGI (LOGD_BRIDGE, "detached bridge port %s", nm_device_get_ip_iface (slave)); } else { _LOGW (LOGD_BRIDGE, "failed to detach bridge port %s", nm_device_get_ip_iface (slave)); } } else { _LOGI (LOGD_BRIDGE, "bridge port %s was detached", nm_device_get_ip_iface (slave)); } } static gboolean create_and_realize (NMDevice *device, NMConnection *connection, NMDevice *parent, const NMPlatformLink **out_plink, GError **error) { NMSettingBridge *s_bridge; const char *iface = nm_device_get_iface (device); const char *hwaddr; gs_free char *hwaddr_cloned = NULL; guint8 mac_address[NM_UTILS_HWADDR_LEN_MAX]; NMPlatformError plerr; nm_assert (iface); s_bridge = nm_connection_get_setting_bridge (connection); nm_assert (s_bridge); hwaddr = nm_setting_bridge_get_mac_address (s_bridge); if ( !hwaddr && nm_device_hw_addr_get_cloned (device, connection, FALSE, &hwaddr_cloned, NULL, NULL)) { /* The cloned MAC address might by dynamic, for example with stable-id="${RANDOM}". * It's a bit odd that we first create the device with one dynamic address, * and later on may reset it to another. That is, because we don't cache * the dynamic address in @device, like we do during nm_device_hw_addr_set_cloned(). */ hwaddr = hwaddr_cloned; } if (hwaddr) { if (!nm_utils_hwaddr_aton (hwaddr, mac_address, ETH_ALEN)) { g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED, "Invalid hardware address '%s'", hwaddr); g_return_val_if_reached (FALSE); } } plerr = nm_platform_link_bridge_add (nm_device_get_platform (device), iface, hwaddr ? mac_address : NULL, hwaddr ? ETH_ALEN : 0, out_plink); if (plerr != NM_PLATFORM_ERROR_SUCCESS) { g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_CREATION_FAILED, "Failed to create bridge interface '%s' for '%s': %s", iface, nm_connection_get_id (connection), nm_platform_error_to_string_a (plerr)); return FALSE; } return TRUE; } /*****************************************************************************/ static void nm_device_bridge_init (NMDeviceBridge * self) { nm_assert (nm_device_is_master (NM_DEVICE (self))); } static void nm_device_bridge_class_init (NMDeviceBridgeClass *klass) { NMDeviceClass *parent_class = NM_DEVICE_CLASS (klass); NM_DEVICE_CLASS_DECLARE_TYPES (klass, NM_SETTING_BRIDGE_SETTING_NAME, NM_LINK_TYPE_BRIDGE) parent_class->is_master = TRUE; parent_class->get_generic_capabilities = get_generic_capabilities; parent_class->check_connection_compatible = check_connection_compatible; parent_class->check_connection_available = check_connection_available; parent_class->complete_connection = complete_connection; parent_class->update_connection = update_connection; parent_class->master_update_slave_connection = master_update_slave_connection; parent_class->create_and_realize = create_and_realize; parent_class->act_stage1_prepare = act_stage1_prepare; parent_class->act_stage2_config = act_stage2_config; parent_class->deactivate = deactivate; parent_class->enslave_slave = enslave_slave; parent_class->release_slave = release_slave; parent_class->get_configured_mtu = nm_device_get_configured_mtu_for_wired; nm_exported_object_class_add_interface (NM_EXPORTED_OBJECT_CLASS (klass), NMDBUS_TYPE_DEVICE_BRIDGE_SKELETON, NULL); } /*****************************************************************************/ #define NM_TYPE_BRIDGE_DEVICE_FACTORY (nm_bridge_device_factory_get_type ()) #define NM_BRIDGE_DEVICE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_BRIDGE_DEVICE_FACTORY, NMBridgeDeviceFactory)) static NMDevice * create_device (NMDeviceFactory *factory, const char *iface, const NMPlatformLink *plink, NMConnection *connection, gboolean *out_ignore) { return (NMDevice *) g_object_new (NM_TYPE_DEVICE_BRIDGE, NM_DEVICE_IFACE, iface, NM_DEVICE_DRIVER, "bridge", NM_DEVICE_TYPE_DESC, "Bridge", NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_BRIDGE, NM_DEVICE_LINK_TYPE, NM_LINK_TYPE_BRIDGE, NULL); } static gboolean match_connection (NMDeviceFactory *factory, NMConnection *connection) { const char *type = nm_connection_get_connection_type (connection); if (nm_streq (type, NM_SETTING_BRIDGE_SETTING_NAME)) return TRUE; nm_assert (nm_streq (type, NM_SETTING_BLUETOOTH_SETTING_NAME)); if (!_nm_connection_get_setting_bluetooth_for_nap (connection)) return FALSE; if (!g_type_from_name ("NMBluezManager")) { /* bluetooth NAP connections are handled by bridge factory. However, * it needs help from the bluetooth plugin, so if the plugin is not loaded, * we claim not to support it. */ return FALSE; } return TRUE; } NM_DEVICE_FACTORY_DEFINE_INTERNAL (BRIDGE, Bridge, bridge, NM_DEVICE_FACTORY_DECLARE_LINK_TYPES (NM_LINK_TYPE_BRIDGE) NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES (NM_SETTING_BRIDGE_SETTING_NAME, NM_SETTING_BLUETOOTH_SETTING_NAME), factory_class->create_device = create_device; factory_class->match_connection = match_connection; );