diff options
Diffstat (limited to 'src/core/devices/nm-device-tun.c')
| -rw-r--r-- | src/core/devices/nm-device-tun.c | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/src/core/devices/nm-device-tun.c b/src/core/devices/nm-device-tun.c new file mode 100644 index 0000000000..c4dd4b47bb --- /dev/null +++ b/src/core/devices/nm-device-tun.c @@ -0,0 +1,571 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2013 - 2015 Red Hat, Inc. + */ + +#include "nm-default.h" + +#include "nm-device-tun.h" + +#include <stdlib.h> +#include <sys/types.h> +#include <linux/if_tun.h> + +#include "nm-act-request.h" +#include "nm-device-private.h" +#include "nm-ip4-config.h" +#include "platform/nm-platform.h" +#include "nm-device-factory.h" +#include "nm-setting-tun.h" +#include "nm-core-internal.h" + +#define _NMLOG_DEVICE_TYPE NMDeviceTun +#include "nm-device-logging.h" + +/*****************************************************************************/ + +NM_GOBJECT_PROPERTIES_DEFINE(NMDeviceTun, + PROP_OWNER, + PROP_GROUP, + PROP_MODE, + PROP_NO_PI, + PROP_VNET_HDR, + PROP_MULTI_QUEUE, ); + +typedef struct { + NMPlatformLnkTun props; +} NMDeviceTunPrivate; + +struct _NMDeviceTun { + NMDevice parent; + NMDeviceTunPrivate _priv; +}; + +struct _NMDeviceTunClass { + NMDeviceClass parent; +}; + +G_DEFINE_TYPE(NMDeviceTun, nm_device_tun, NM_TYPE_DEVICE) + +#define NM_DEVICE_TUN_GET_PRIVATE(self) \ + _NM_GET_PRIVATE(self, NMDeviceTun, NM_IS_DEVICE_TUN, NMDevice) + +/*****************************************************************************/ + +static void +update_properties_from_struct(NMDeviceTun *self, const NMPlatformLnkTun *props) +{ + NMDeviceTunPrivate * priv = NM_DEVICE_TUN_GET_PRIVATE(self); + const NMPlatformLnkTun props0 = {}; + + if (!props) { + /* allow passing %NULL to reset all properties. */ + props = &props0; + } + + g_object_freeze_notify(G_OBJECT(self)); + +#define CHECK_PROPERTY_CHANGED_VALID(field, prop) \ + G_STMT_START \ + { \ + if (priv->props.field != props->field \ + || priv->props.field##_valid != props->field##_valid) { \ + priv->props.field##_valid = props->field##_valid; \ + priv->props.field = props->field; \ + _notify(self, prop); \ + } \ + } \ + G_STMT_END + +#define CHECK_PROPERTY_CHANGED(field, prop) \ + G_STMT_START \ + { \ + if (priv->props.field != props->field) { \ + priv->props.field = props->field; \ + _notify(self, prop); \ + } \ + } \ + G_STMT_END + + CHECK_PROPERTY_CHANGED_VALID(owner, PROP_OWNER); + CHECK_PROPERTY_CHANGED_VALID(group, PROP_GROUP); + CHECK_PROPERTY_CHANGED(type, PROP_MODE); + CHECK_PROPERTY_CHANGED(pi, PROP_NO_PI); + CHECK_PROPERTY_CHANGED(vnet_hdr, PROP_VNET_HDR); + CHECK_PROPERTY_CHANGED(multi_queue, PROP_MULTI_QUEUE); + + g_object_thaw_notify(G_OBJECT(self)); +} + +static void +update_properties(NMDeviceTun *self) +{ + NMPlatformLnkTun props_storage; + const NMPlatformLnkTun *props = NULL; + int ifindex; + + ifindex = nm_device_get_ifindex(NM_DEVICE(self)); + if (ifindex > 0 + && nm_platform_link_tun_get_properties(nm_device_get_platform(NM_DEVICE(self)), + ifindex, + &props_storage)) + props = &props_storage; + + update_properties_from_struct(self, props); +} + +static NMDeviceCapabilities +get_generic_capabilities(NMDevice *dev) +{ + return NM_DEVICE_CAP_IS_SOFTWARE; +} + +static void +link_changed(NMDevice *device, const NMPlatformLink *pllink) +{ + NM_DEVICE_CLASS(nm_device_tun_parent_class)->link_changed(device, pllink); + update_properties(NM_DEVICE_TUN(device)); +} + +static gboolean +complete_connection(NMDevice * device, + NMConnection * connection, + const char * specific_object, + NMConnection *const *existing_connections, + GError ** error) +{ + NMSettingTun *s_tun; + + nm_utils_complete_generic(nm_device_get_platform(device), + connection, + NM_SETTING_TUN_SETTING_NAME, + existing_connections, + NULL, + _("TUN connection"), + NULL, + NULL, + TRUE); + + s_tun = nm_connection_get_setting_tun(connection); + if (!s_tun) { + g_set_error_literal(error, + NM_DEVICE_ERROR, + NM_DEVICE_ERROR_INVALID_CONNECTION, + "A 'tun' setting is required."); + return FALSE; + } + + return TRUE; +} + +static void +update_connection(NMDevice *device, NMConnection *connection) +{ + NMDeviceTun * self = NM_DEVICE_TUN(device); + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE(self); + NMSettingTun * s_tun; + NMSettingTunMode mode; + char s_buf[100]; + const char * str; + + /* Note: since we read tun properties from sysctl for older kernels, + * we don't get proper change notifications. Make sure that all our + * tun properties are up to date at this point. We should not do this, + * if we would entirely rely on netlink events. */ + update_properties(NM_DEVICE_TUN(device)); + + switch (priv->props.type) { + case IFF_TUN: + mode = NM_SETTING_TUN_MODE_TUN; + break; + case IFF_TAP: + mode = NM_SETTING_TUN_MODE_TAP; + break; + default: + /* Huh? */ + return; + } + + s_tun = nm_connection_get_setting_tun(connection); + if (!s_tun) { + s_tun = (NMSettingTun *) nm_setting_tun_new(); + nm_connection_add_setting(connection, (NMSetting *) s_tun); + } + + if (mode != nm_setting_tun_get_mode(s_tun)) + g_object_set(G_OBJECT(s_tun), NM_SETTING_TUN_MODE, (guint) mode, NULL); + + str = priv->props.owner_valid ? nm_sprintf_buf(s_buf, "%" G_GINT32_FORMAT, priv->props.owner) + : NULL; + if (!nm_streq0(str, nm_setting_tun_get_owner(s_tun))) + g_object_set(G_OBJECT(s_tun), NM_SETTING_TUN_OWNER, str, NULL); + + str = priv->props.group_valid ? nm_sprintf_buf(s_buf, "%" G_GINT32_FORMAT, priv->props.group) + : NULL; + if (!nm_streq0(str, nm_setting_tun_get_group(s_tun))) + g_object_set(G_OBJECT(s_tun), NM_SETTING_TUN_GROUP, str, NULL); + + if (priv->props.pi != nm_setting_tun_get_pi(s_tun)) + g_object_set(G_OBJECT(s_tun), NM_SETTING_TUN_PI, (gboolean) priv->props.pi, NULL); + if (priv->props.vnet_hdr != nm_setting_tun_get_vnet_hdr(s_tun)) + g_object_set(G_OBJECT(s_tun), + NM_SETTING_TUN_VNET_HDR, + (gboolean) priv->props.vnet_hdr, + NULL); + if (priv->props.multi_queue != nm_setting_tun_get_multi_queue(s_tun)) + g_object_set(G_OBJECT(s_tun), + NM_SETTING_TUN_MULTI_QUEUE, + (gboolean) priv->props.multi_queue, + NULL); +} + +static gboolean +create_and_realize(NMDevice * device, + NMConnection * connection, + NMDevice * parent, + const NMPlatformLink **out_plink, + GError ** error) +{ + const char * iface = nm_device_get_iface(device); + NMPlatformLnkTun props = {}; + NMSettingTun * s_tun; + gint64 owner; + gint64 group; + int r; + + s_tun = nm_connection_get_setting_tun(connection); + g_return_val_if_fail(s_tun, FALSE); + + switch (nm_setting_tun_get_mode(s_tun)) { + case NM_SETTING_TUN_MODE_TAP: + props.type = IFF_TAP; + break; + case NM_SETTING_TUN_MODE_TUN: + props.type = IFF_TUN; + break; + default: + g_return_val_if_reached(FALSE); + } + + owner = _nm_utils_ascii_str_to_int64(nm_setting_tun_get_owner(s_tun), 10, 0, G_MAXINT32, -1); + if (owner != -1) { + props.owner_valid = TRUE; + props.owner = owner; + } + group = _nm_utils_ascii_str_to_int64(nm_setting_tun_get_group(s_tun), 10, 0, G_MAXINT32, -1); + if (group != -1) { + props.group_valid = TRUE; + props.group = group; + } + + props.pi = nm_setting_tun_get_pi(s_tun); + props.vnet_hdr = nm_setting_tun_get_vnet_hdr(s_tun); + props.multi_queue = nm_setting_tun_get_multi_queue(s_tun); + props.persist = TRUE; + + r = nm_platform_link_tun_add(nm_device_get_platform(device), iface, &props, out_plink, NULL); + if (r < 0) { + g_set_error(error, + NM_DEVICE_ERROR, + NM_DEVICE_ERROR_CREATION_FAILED, + "Failed to create TUN/TAP interface '%s' for '%s': %s", + iface, + nm_connection_get_id(connection), + nm_strerror(r)); + return FALSE; + } + + return TRUE; +} + +static gboolean +_same_og(const char *str, gboolean og_valid, guint32 og_num) +{ + gint64 v; + + v = _nm_utils_ascii_str_to_int64(str, 10, 0, G_MAXINT32, -1); + return (!og_valid && (v == (gint64) -1)) || (og_valid && (((guint32) v) == og_num)); +} + +static gboolean +check_connection_compatible(NMDevice *device, NMConnection *connection, GError **error) +{ + NMDeviceTun * self = NM_DEVICE_TUN(device); + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE(self); + NMSettingTunMode mode; + NMSettingTun * s_tun; + + if (!NM_DEVICE_CLASS(nm_device_tun_parent_class) + ->check_connection_compatible(device, connection, error)) + return FALSE; + + if (nm_device_is_real(device)) { + switch (priv->props.type) { + case IFF_TUN: + mode = NM_SETTING_TUN_MODE_TUN; + break; + case IFF_TAP: + mode = NM_SETTING_TUN_MODE_TAP; + break; + default: + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "invalid tun type on device"); + return FALSE; + } + + s_tun = nm_connection_get_setting_tun(connection); + + if (mode != nm_setting_tun_get_mode(s_tun)) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun mode setting mismatches"); + return FALSE; + } + if (!_same_og(nm_setting_tun_get_owner(s_tun), + priv->props.owner_valid, + priv->props.owner)) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun owner setting mismatches"); + return FALSE; + } + if (!_same_og(nm_setting_tun_get_group(s_tun), + priv->props.group_valid, + priv->props.group)) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun group setting mismatches"); + return FALSE; + } + if (nm_setting_tun_get_pi(s_tun) != priv->props.pi) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun pi setting mismatches"); + return FALSE; + } + if (nm_setting_tun_get_vnet_hdr(s_tun) != priv->props.vnet_hdr) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun vnet-hdr setting mismatches"); + return FALSE; + } + if (nm_setting_tun_get_multi_queue(s_tun) != priv->props.multi_queue) { + nm_utils_error_set_literal(error, + NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY, + "tun multi-queue setting mismatches"); + return FALSE; + } + } + + return TRUE; +} + +static NMActStageReturn +act_stage1_prepare(NMDevice *device, NMDeviceStateReason *out_failure_reason) +{ + NMDeviceTun * self = NM_DEVICE_TUN(device); + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE(self); + + if (priv->props.type == IFF_TUN) { + /* Nothing to do for TUN devices */ + } else { + if (!nm_device_hw_addr_set_cloned(device, + nm_device_get_applied_connection(device), + FALSE)) { + *out_failure_reason = NM_DEVICE_STATE_REASON_CONFIG_FAILED; + return NM_ACT_STAGE_RETURN_FAILURE; + } + } + + return NM_ACT_STAGE_RETURN_SUCCESS; +} + +static void +unrealize_notify(NMDevice *device) +{ + NM_DEVICE_CLASS(nm_device_tun_parent_class)->unrealize_notify(device); + update_properties_from_struct(NM_DEVICE_TUN(device), NULL); +} + +/*****************************************************************************/ + +static void +get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +{ + NMDeviceTun * self = NM_DEVICE_TUN(object); + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE(self); + const char * s; + + switch (prop_id) { + case PROP_OWNER: + g_value_set_int64(value, + priv->props.owner_valid ? (gint64) priv->props.owner : (gint64) -1); + break; + case PROP_GROUP: + g_value_set_int64(value, + priv->props.group_valid ? (gint64) priv->props.group : (gint64) -1); + break; + case PROP_MODE: + switch (priv->props.type) { + case IFF_TUN: + s = "tun"; + break; + case IFF_TAP: + s = "tap"; + break; + default: + s = NULL; + break; + } + g_value_set_static_string(value, s); + break; + case PROP_NO_PI: + g_value_set_boolean(value, !priv->props.pi); + break; + case PROP_VNET_HDR: + g_value_set_boolean(value, priv->props.vnet_hdr); + break; + case PROP_MULTI_QUEUE: + g_value_set_boolean(value, priv->props.multi_queue); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); + break; + } +} + +/*****************************************************************************/ + +static void +nm_device_tun_init(NMDeviceTun *self) +{} + +static const NMDBusInterfaceInfoExtended interface_info_device_tun = { + .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT( + NM_DBUS_INTERFACE_DEVICE_TUN, + .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, ), + .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS( + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Owner", "x", NM_DEVICE_TUN_OWNER), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Group", "x", NM_DEVICE_TUN_GROUP), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Mode", "s", NM_DEVICE_TUN_MODE), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("NoPi", "b", NM_DEVICE_TUN_NO_PI), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VnetHdr", + "b", + NM_DEVICE_TUN_VNET_HDR), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("MultiQueue", + "b", + NM_DEVICE_TUN_MULTI_QUEUE), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("HwAddress", + "s", + NM_DEVICE_HW_ADDRESS), ), ), + .legacy_property_changed = TRUE, +}; + +static void +nm_device_tun_class_init(NMDeviceTunClass *klass) +{ + GObjectClass * object_class = G_OBJECT_CLASS(klass); + NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS(klass); + NMDeviceClass * device_class = NM_DEVICE_CLASS(klass); + + object_class->get_property = get_property; + + dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS(&interface_info_device_tun); + + device_class->connection_type_supported = NM_SETTING_TUN_SETTING_NAME; + device_class->connection_type_check_compatible = NM_SETTING_TUN_SETTING_NAME; + device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES(NM_LINK_TYPE_TUN); + + device_class->link_changed = link_changed; + device_class->complete_connection = complete_connection; + device_class->check_connection_compatible = check_connection_compatible; + device_class->create_and_realize = create_and_realize; + device_class->get_generic_capabilities = get_generic_capabilities; + device_class->unrealize_notify = unrealize_notify; + device_class->update_connection = update_connection; + device_class->act_stage1_prepare = act_stage1_prepare; + device_class->get_configured_mtu = nm_device_get_configured_mtu_for_wired; + + obj_properties[PROP_OWNER] = g_param_spec_int64(NM_DEVICE_TUN_OWNER, + "", + "", + -1, + G_MAXUINT32, + -1, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_GROUP] = g_param_spec_int64(NM_DEVICE_TUN_GROUP, + "", + "", + -1, + G_MAXUINT32, + -1, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_MODE] = g_param_spec_string(NM_DEVICE_TUN_MODE, + "", + "", + NULL, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_NO_PI] = g_param_spec_boolean(NM_DEVICE_TUN_NO_PI, + "", + "", + FALSE, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_VNET_HDR] = g_param_spec_boolean(NM_DEVICE_TUN_VNET_HDR, + "", + "", + FALSE, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_MULTI_QUEUE] = + g_param_spec_boolean(NM_DEVICE_TUN_MULTI_QUEUE, + "", + "", + FALSE, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties); +} + +/*****************************************************************************/ + +#define NM_TYPE_TUN_DEVICE_FACTORY (nm_tun_device_factory_get_type()) +#define NM_TUN_DEVICE_FACTORY(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj), NM_TYPE_TUN_DEVICE_FACTORY, NMTunDeviceFactory)) + +static NMDevice * +create_device(NMDeviceFactory * factory, + const char * iface, + const NMPlatformLink *plink, + NMConnection * connection, + gboolean * out_ignore) +{ + g_return_val_if_fail(!plink || plink->type == NM_LINK_TYPE_TUN, NULL); + g_return_val_if_fail(!connection + || nm_streq0(nm_connection_get_connection_type(connection), + NM_SETTING_TUN_SETTING_NAME), + NULL); + + return g_object_new(NM_TYPE_DEVICE_TUN, + NM_DEVICE_IFACE, + iface, + NM_DEVICE_TYPE_DESC, + "Tun", + NM_DEVICE_DEVICE_TYPE, + NM_DEVICE_TYPE_TUN, + NM_DEVICE_LINK_TYPE, + (guint) NM_LINK_TYPE_TUN, + NULL); +} + +NM_DEVICE_FACTORY_DEFINE_INTERNAL( + TUN, + Tun, + tun, + NM_DEVICE_FACTORY_DECLARE_LINK_TYPES(NM_LINK_TYPE_TUN) + NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES(NM_SETTING_TUN_SETTING_NAME), + factory_class->create_device = create_device;); |