diff options
Diffstat (limited to 'src/core/vpn/nm-vpn-connection.c')
| -rw-r--r-- | src/core/vpn/nm-vpn-connection.c | 2990 |
1 files changed, 2990 insertions, 0 deletions
diff --git a/src/core/vpn/nm-vpn-connection.c b/src/core/vpn/nm-vpn-connection.c new file mode 100644 index 00000000..02831b08 --- /dev/null +++ b/src/core/vpn/nm-vpn-connection.c @@ -0,0 +1,2990 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2005 - 2013 Red Hat, Inc. + * Copyright (C) 2006 - 2008 Novell, Inc. + */ + +#include "src/core/nm-default-daemon.h" + +#include "nm-vpn-connection.h" + +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <stdlib.h> +#include <unistd.h> +#include <syslog.h> +#include <linux/rtnetlink.h> + +#include "nm-proxy-config.h" +#include "nm-ip4-config.h" +#include "nm-ip6-config.h" +#include "platform/nm-platform.h" +#include "nm-active-connection.h" +#include "NetworkManagerUtils.h" +#include "settings/nm-settings-connection.h" +#include "nm-dispatcher.h" +#include "nm-netns.h" +#include "settings/nm-agent-manager.h" +#include "nm-core-internal.h" +#include "nm-pacrunner-manager.h" +#include "nm-firewall-manager.h" +#include "nm-config.h" +#include "nm-vpn-plugin-info.h" +#include "nm-vpn-manager.h" +#include "dns/nm-dns-manager.h" + +typedef enum { + /* Only system secrets */ + SECRETS_REQ_SYSTEM = 0, + /* All existing secrets including agent secrets */ + SECRETS_REQ_EXISTING = 1, + /* New secrets required; ask an agent */ + SECRETS_REQ_NEW = 2, + /* Plugin requests secrets interactively */ + SECRETS_REQ_INTERACTIVE = 3, + /* Placeholder for bounds checking */ + SECRETS_REQ_LAST +} SecretsReq; + +/* Internal VPN states, private to NMVpnConnection */ +typedef enum { + STATE_UNKNOWN = 0, + STATE_WAITING, + STATE_PREPARE, + STATE_NEED_AUTH, + STATE_CONNECT, + STATE_IP_CONFIG_GET, + STATE_PRE_UP, + STATE_ACTIVATED, + STATE_DEACTIVATING, + STATE_DISCONNECTED, + STATE_FAILED, +} VpnState; + +enum { + INTERNAL_STATE_CHANGED, + INTERNAL_RETRY_AFTER_FAILURE, + + LAST_SIGNAL +}; + +static guint signals[LAST_SIGNAL] = {0}; + +NM_GOBJECT_PROPERTIES_DEFINE(NMVpnConnection, PROP_VPN_STATE, PROP_BANNER, +#define PROP_IP4_CONFIG 2000 +#define PROP_IP6_CONFIG 2001 +#define PROP_MASTER 2002 +); + +typedef struct { + gboolean service_can_persist; + gboolean connection_can_persist; + + NMSettingsConnectionCallId *secrets_id; + SecretsReq secrets_idx; + char * username; + + VpnState vpn_state; + NMDispatcherCallId * dispatcher_id; + NMActiveConnectionStateReason failure_reason; + + NMVpnServiceState service_state; + guint start_timeout; + gboolean service_running; + NMVpnPluginInfo * plugin_info; + char * bus_name; + + NMFirewallManagerCallId *fw_call; + + NMNetns *netns; + + GPtrArray *ip4_dev_route_blacklist; + + GDBusProxy * proxy; + GCancellable * cancellable; + GVariant * connect_hash; + guint connect_timeout; + NMProxyConfig * proxy_config; + NMPacrunnerConfId *pacrunner_conf_id; + gboolean has_ip4; + NMIP4Config * ip4_config; + guint32 ip4_internal_gw; + guint32 ip4_external_gw; + gboolean has_ip6; + NMIP6Config * ip6_config; + + /* These config instances are passed on to NMDevice and modified by NMDevice. + * This pointer is only useful for nm_device_replace_vpn4_config() to clear the + * previous configuration. Consider these instances to be owned by NMDevice. */ + NMIP4Config *last_device_ip4_config; + NMIP6Config *last_device_ip6_config; + + struct in6_addr *ip6_internal_gw; + struct in6_addr *ip6_external_gw; + char * ip_iface; + int ip_ifindex; + char * banner; + guint32 mtu; +} NMVpnConnectionPrivate; + +struct _NMVpnConnection { + NMActiveConnection parent; + NMVpnConnectionPrivate _priv; +}; + +struct _NMVpnConnectionClass { + NMActiveConnectionClass parent; +}; + +G_DEFINE_TYPE(NMVpnConnection, nm_vpn_connection, NM_TYPE_ACTIVE_CONNECTION) + +#define NM_VPN_CONNECTION_GET_PRIVATE(self) \ + _NM_GET_PRIVATE(self, NMVpnConnection, NM_IS_VPN_CONNECTION, NMActiveConnection) + +/*****************************************************************************/ + +static const NMDBusInterfaceInfoExtended interface_info_vpn_connection; +static const GDBusSignalInfo signal_info_vpn_state_changed; + +static NMSettingsConnection *_get_settings_connection(NMVpnConnection *self, + gboolean allow_missing); + +static void get_secrets(NMVpnConnection *self, SecretsReq secrets_idx, const char *const *hints); + +static guint32 get_route_table(NMVpnConnection *self, int addr_family, gboolean fallback_main); + +static void plugin_interactive_secrets_required(NMVpnConnection * self, + const char * message, + const char *const *secrets); + +static void _set_vpn_state(NMVpnConnection * self, + VpnState vpn_state, + NMActiveConnectionStateReason reason, + gboolean quitting); + +/*****************************************************************************/ + +#define _NMLOG_DOMAIN LOGD_VPN +#define _NMLOG_PREFIX_NAME "vpn-connection" + +#define __NMLOG_prefix_buf_len 128 + +static const char * +__LOG_create_prefix(char *buf, NMVpnConnection *self, NMSettingsConnection *con) +{ + NMVpnConnectionPrivate *priv; + const char * id; + + if (!self) + return _NMLOG_PREFIX_NAME; + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + id = con ? nm_settings_connection_get_id(con) : NULL; + + g_snprintf(buf, + __NMLOG_prefix_buf_len, + "%s[" + "%p" /*self*/ + "%s%s" /*con-uuid*/ + "%s%s%s%s" /*con-id*/ + ",%d" /*ifindex*/ + "%s%s%s" /*iface*/ + "]", + _NMLOG_PREFIX_NAME, + self, + con ? "," : "--", + con ? (nm_settings_connection_get_uuid(con) ?: "??") : "", + con ? "," : "", + NM_PRINT_FMT_QUOTED(id, "\"", id, "\"", con ? "??" : ""), + priv->ip_ifindex, + NM_PRINT_FMT_QUOTED(priv->ip_iface, ":(", priv->ip_iface, ")", "")); + + return buf; +} + +#define _NMLOG(level, ...) \ + G_STMT_START \ + { \ + const NMLogLevel _level = (level); \ + NMSettingsConnection *_con = (self) ? _get_settings_connection(self, TRUE) : NULL; \ + \ + if (nm_logging_enabled(_level, _NMLOG_DOMAIN)) { \ + char __prefix[__NMLOG_prefix_buf_len]; \ + \ + _nm_log(_level, \ + _NMLOG_DOMAIN, \ + 0, \ + (self) ? NM_VPN_CONNECTION_GET_PRIVATE(self)->ip_iface : NULL, \ + (_con) ? nm_settings_connection_get_uuid(_con) : NULL, \ + "%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \ + __LOG_create_prefix(__prefix, (self), _con) \ + _NM_UTILS_MACRO_REST(__VA_ARGS__)); \ + } \ + } \ + G_STMT_END + +/*****************************************************************************/ + +static void +cancel_get_secrets(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->secrets_id) { + nm_settings_connection_cancel_secrets(_get_settings_connection(self, FALSE), + priv->secrets_id); + g_warn_if_fail(!priv->secrets_id); + priv->secrets_id = NULL; + } +} + +static NMVpnConnectionState +_state_to_nm_vpn_state(VpnState state) +{ + switch (state) { + case STATE_WAITING: + case STATE_PREPARE: + return NM_VPN_CONNECTION_STATE_PREPARE; + case STATE_NEED_AUTH: + return NM_VPN_CONNECTION_STATE_NEED_AUTH; + case STATE_CONNECT: + return NM_VPN_CONNECTION_STATE_CONNECT; + case STATE_IP_CONFIG_GET: + case STATE_PRE_UP: + return NM_VPN_CONNECTION_STATE_IP_CONFIG_GET; + case STATE_ACTIVATED: + return NM_VPN_CONNECTION_STATE_ACTIVATED; + case STATE_DEACTIVATING: + { + /* Map DEACTIVATING to ACTIVATED to preserve external API behavior, + * since our API has no DEACTIVATING state of its own. Since this can + * take some time, and the VPN isn't actually disconnected until it + * hits the DISCONNECTED state, to clients it should still appear + * connected. + */ + return NM_VPN_CONNECTION_STATE_ACTIVATED; + } + case STATE_DISCONNECTED: + return NM_VPN_CONNECTION_STATE_DISCONNECTED; + case STATE_FAILED: + return NM_VPN_CONNECTION_STATE_FAILED; + default: + return NM_VPN_CONNECTION_STATE_UNKNOWN; + } +} + +static NMActiveConnectionState +_state_to_ac_state(VpnState vpn_state) +{ + /* Set the NMActiveConnection state based on VPN state */ + switch (vpn_state) { + case STATE_WAITING: + case STATE_PREPARE: + case STATE_NEED_AUTH: + case STATE_CONNECT: + case STATE_IP_CONFIG_GET: + case STATE_PRE_UP: + return NM_ACTIVE_CONNECTION_STATE_ACTIVATING; + case STATE_ACTIVATED: + return NM_ACTIVE_CONNECTION_STATE_ACTIVATED; + case STATE_DEACTIVATING: + return NM_ACTIVE_CONNECTION_STATE_DEACTIVATING; + case STATE_DISCONNECTED: + case STATE_FAILED: + return NM_ACTIVE_CONNECTION_STATE_DEACTIVATED; + default: + break; + } + return NM_ACTIVE_CONNECTION_STATE_UNKNOWN; +} + +static NMSettingsConnection * +_get_settings_connection(NMVpnConnection *self, gboolean allow_missing) +{ + NMSettingsConnection *con; + + /* Currently, we operate on the assumption, that the settings-connection + * never changes after it is set (though initially, it might be unset). + * Later we might want to change that, but then we need fixes here too. */ + + con = _nm_active_connection_get_settings_connection(NM_ACTIVE_CONNECTION(self)); + if (!con && !allow_missing) + g_return_val_if_reached(NULL); + return con; +} + +static NMConnection * +_get_applied_connection(NMVpnConnection *connection) +{ + NMConnection *con; + + con = nm_active_connection_get_applied_connection(NM_ACTIVE_CONNECTION(connection)); + g_return_val_if_fail(con, NULL); + return con; +} + +static void +disconnect_cb(GDBusProxy *proxy, GAsyncResult *result, gpointer user_data) +{ + GVariant *variant; + + variant = g_dbus_proxy_call_finish(proxy, result, NULL); + if (variant) + g_variant_unref(variant); + g_object_unref(user_data); +} + +static void +fw_call_cleanup(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->fw_call) { + nm_firewall_manager_cancel_call(priv->fw_call); + g_warn_if_fail(!priv->fw_call); + priv->fw_call = NULL; + } +} + +static void +remove_parent_device_config(NMVpnConnection *connection, NMDevice *device) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(connection); + + if (priv->last_device_ip4_config) { + nm_device_replace_vpn4_config(device, priv->last_device_ip4_config, NULL); + g_clear_object(&priv->last_device_ip4_config); + } + + if (priv->last_device_ip6_config) { + nm_device_replace_vpn6_config(device, priv->last_device_ip6_config, NULL); + g_clear_object(&priv->last_device_ip6_config); + } +} + +static void +vpn_cleanup(NMVpnConnection *self, NMDevice *parent_dev) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->ip_ifindex) { + NMPlatform *platform = nm_netns_get_platform(priv->netns); + + nm_platform_link_set_down(platform, priv->ip_ifindex); + nm_platform_ip_route_flush(platform, AF_UNSPEC, priv->ip_ifindex); + nm_platform_ip_address_flush(platform, AF_UNSPEC, priv->ip_ifindex); + } + + remove_parent_device_config(self, parent_dev); + + /* Remove zone from firewall */ + if (priv->ip_iface) { + nm_firewall_manager_remove_from_zone(nm_firewall_manager_get(), + priv->ip_iface, + NULL, + NULL, + NULL); + } + /* Cancel pending firewall call */ + fw_call_cleanup(self); + + g_free(priv->banner); + priv->banner = NULL; + + g_free(priv->ip_iface); + priv->ip_iface = NULL; + priv->ip_ifindex = 0; + + g_free(priv->bus_name); + priv->bus_name = NULL; + + /* Clear out connection secrets to ensure that the settings service + * gets asked for them next time the connection is activated. + */ + nm_active_connection_clear_secrets(NM_ACTIVE_CONNECTION(self)); +} + +static void +dispatcher_pre_down_done(NMDispatcherCallId *call_id, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + nm_assert(call_id); + nm_assert(priv->dispatcher_id == call_id); + + priv->dispatcher_id = NULL; + _set_vpn_state(self, + STATE_DISCONNECTED, + NM_ACTIVE_CONNECTION_STATE_REASON_USER_DISCONNECTED, + FALSE); +} + +static void +dispatcher_pre_up_done(NMDispatcherCallId *call_id, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + nm_assert(call_id); + nm_assert(priv->dispatcher_id == call_id); + + priv->dispatcher_id = NULL; + _set_vpn_state(self, STATE_ACTIVATED, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); +} + +static void +dispatcher_cleanup(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->dispatcher_id) + nm_dispatcher_call_cancel(g_steal_pointer(&priv->dispatcher_id)); +} + +static void +_set_vpn_state(NMVpnConnection * self, + VpnState vpn_state, + NMActiveConnectionStateReason reason, + gboolean quitting) +{ + NMVpnConnectionPrivate *priv; + VpnState old_vpn_state; + NMVpnConnectionState new_external_state, old_external_state; + NMDevice * parent_dev = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(self)); + NMConnection *applied; + + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (vpn_state == priv->vpn_state) + return; + + old_vpn_state = priv->vpn_state; + priv->vpn_state = vpn_state; + + /* The device gets destroyed by active connection when it enters + * the deactivated state, so we need to ref it for usage below. + */ + if (parent_dev) + g_object_ref(parent_dev); + + /* Update active connection base class state */ + nm_active_connection_set_state(NM_ACTIVE_CONNECTION(self), + _state_to_ac_state(vpn_state), + reason); + + /* Clear any in-progress secrets request */ + cancel_get_secrets(self); + + dispatcher_cleanup(self); + + /* The connection gets destroyed by the VPN manager when it enters the + * disconnected/failed state, but we need to keep it around for a bit + * to send out signals and handle the dispatcher. So ref it. + */ + g_object_ref(self); + + old_external_state = _state_to_nm_vpn_state(old_vpn_state); + new_external_state = _state_to_nm_vpn_state(priv->vpn_state); + if (new_external_state != old_external_state) { + nm_dbus_object_emit_signal(NM_DBUS_OBJECT(self), + &interface_info_vpn_connection, + &signal_info_vpn_state_changed, + "(uu)", + (guint32) new_external_state, + (guint32) reason); + g_signal_emit(self, + signals[INTERNAL_STATE_CHANGED], + 0, + new_external_state, + old_external_state, + reason); + _notify(self, PROP_VPN_STATE); + } + + switch (vpn_state) { + case STATE_NEED_AUTH: + /* Do nothing; not part of 'default' because we don't want to touch + * priv->secrets_req as NEED_AUTH is re-entered during interactive + * secrets. + */ + break; + case STATE_PRE_UP: + if (!nm_dispatcher_call_vpn(NM_DISPATCHER_ACTION_VPN_PRE_UP, + _get_settings_connection(self, FALSE), + _get_applied_connection(self), + parent_dev, + priv->ip_iface, + priv->proxy_config, + priv->ip4_config, + priv->ip6_config, + dispatcher_pre_up_done, + self, + &priv->dispatcher_id)) { + /* Just proceed on errors */ + dispatcher_pre_up_done(0, self); + } + break; + case STATE_ACTIVATED: + applied = _get_applied_connection(self); + + /* Secrets no longer needed now that we're connected */ + nm_active_connection_clear_secrets(NM_ACTIVE_CONNECTION(self)); + + /* Let dispatcher scripts know we're up and running */ + nm_dispatcher_call_vpn(NM_DISPATCHER_ACTION_VPN_UP, + _get_settings_connection(self, FALSE), + applied, + parent_dev, + priv->ip_iface, + priv->proxy_config, + priv->ip4_config, + priv->ip6_config, + NULL, + NULL, + NULL); + + if (priv->proxy_config) { + nm_pacrunner_manager_remove_clear(&priv->pacrunner_conf_id); + priv->pacrunner_conf_id = nm_pacrunner_manager_add(nm_pacrunner_manager_get(), + priv->proxy_config, + priv->ip_iface, + priv->ip4_config, + priv->ip6_config); + } + break; + case STATE_DEACTIVATING: + applied = _get_applied_connection(self); + if (quitting) { + nm_dispatcher_call_vpn_sync(NM_DISPATCHER_ACTION_VPN_PRE_DOWN, + _get_settings_connection(self, FALSE), + applied, + parent_dev, + priv->ip_iface, + priv->proxy_config, + priv->ip4_config, + priv->ip6_config); + } else { + if (!nm_dispatcher_call_vpn(NM_DISPATCHER_ACTION_VPN_PRE_DOWN, + _get_settings_connection(self, FALSE), + applied, + parent_dev, + priv->ip_iface, + priv->proxy_config, + priv->ip4_config, + priv->ip6_config, + dispatcher_pre_down_done, + self, + &priv->dispatcher_id)) { + /* Just proceed on errors */ + dispatcher_pre_down_done(0, self); + } + } + + nm_pacrunner_manager_remove_clear(&priv->pacrunner_conf_id); + break; + case STATE_FAILED: + case STATE_DISCONNECTED: + if (old_vpn_state >= STATE_ACTIVATED && old_vpn_state <= STATE_DEACTIVATING) { + /* Let dispatcher scripts know we're about to go down */ + if (quitting) { + nm_dispatcher_call_vpn_sync(NM_DISPATCHER_ACTION_VPN_DOWN, + _get_settings_connection(self, FALSE), + _get_applied_connection(self), + parent_dev, + priv->ip_iface, + NULL, + NULL, + NULL); + } else { + nm_dispatcher_call_vpn(NM_DISPATCHER_ACTION_VPN_DOWN, + _get_settings_connection(self, FALSE), + _get_applied_connection(self), + parent_dev, + priv->ip_iface, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL); + } + } + + /* Tear down and clean up the connection */ + if (priv->proxy) { + g_dbus_proxy_call(priv->proxy, + "Disconnect", + NULL, + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) disconnect_cb, + g_object_ref(self)); + } + + vpn_cleanup(self, parent_dev); + /* fall-through */ + default: + priv->secrets_idx = SECRETS_REQ_SYSTEM; + break; + } + + g_object_unref(self); + if (parent_dev) + g_object_unref(parent_dev); +} + +static gboolean +_service_and_connection_can_persist(NMVpnConnection *self) +{ + return NM_VPN_CONNECTION_GET_PRIVATE(self)->connection_can_persist + && NM_VPN_CONNECTION_GET_PRIVATE(self)->service_can_persist; +} + +static gboolean +_connection_only_can_persist(NMVpnConnection *self) +{ + return NM_VPN_CONNECTION_GET_PRIVATE(self)->connection_can_persist + && !NM_VPN_CONNECTION_GET_PRIVATE(self)->service_can_persist; +} + +static void +device_state_changed(NMActiveConnection *active, + NMDevice * device, + NMDeviceState new_state, + NMDeviceState old_state) +{ + if (_service_and_connection_can_persist(NM_VPN_CONNECTION(active))) { + if (new_state <= NM_DEVICE_STATE_DISCONNECTED || new_state == NM_DEVICE_STATE_FAILED) { + nm_active_connection_set_device(active, NULL); + } + return; + } + + if (new_state <= NM_DEVICE_STATE_DISCONNECTED) { + _set_vpn_state(NM_VPN_CONNECTION(active), + STATE_DISCONNECTED, + NM_ACTIVE_CONNECTION_STATE_REASON_DEVICE_DISCONNECTED, + FALSE); + } else if (new_state == NM_DEVICE_STATE_FAILED) { + _set_vpn_state(NM_VPN_CONNECTION(active), + STATE_FAILED, + NM_ACTIVE_CONNECTION_STATE_REASON_DEVICE_DISCONNECTED, + FALSE); + } + + /* FIXME: map device DEACTIVATING state to VPN DEACTIVATING state and + * block device deactivation on VPN deactivation. + */ +} + +static void +add_ip4_vpn_gateway_route(NMIP4Config *config, + NMDevice * parent_device, + in_addr_t vpn_gw, + NMPlatform * platform) +{ + guint32 parent_gw = 0; + gboolean has_parent_gw = FALSE; + NMPlatformIP4Route route; + int ifindex; + guint32 route_metric; + nm_auto_nmpobj const NMPObject *route_resolved = NULL; + + g_return_if_fail(NM_IS_IP4_CONFIG(config)); + g_return_if_fail(NM_IS_DEVICE(parent_device)); + g_return_if_fail(vpn_gw != 0); + + ifindex = nm_ip4_config_get_ifindex(config); + + nm_assert(ifindex > 0); + nm_assert(ifindex == nm_device_get_ip_ifindex(parent_device)); + + /* Ask kernel how to reach @vpn_gw. We can only inject the route in + * @parent_device, so whatever we resolve, it can only be on @ifindex. */ + if (nm_platform_ip_route_get(platform, + AF_INET, + &vpn_gw, + ifindex, + (NMPObject **) &route_resolved) + >= 0) { + const NMPlatformIP4Route *r = NMP_OBJECT_CAST_IP4_ROUTE(route_resolved); + + if (r->ifindex == ifindex) { + const NMPObject *obj; + + /* `ip route get` always resolves the route, even if the destination is unreachable. + * In which case, it pretends the destination is directly reachable. + * + * So, only accept direct routes if @vpn_gw is a private network + * or if the parent device also has a direct default route */ + if (nm_platform_route_table_is_main(r->table_coerced)) { + if (r->gateway) { + parent_gw = r->gateway; + has_parent_gw = TRUE; + } else if (nm_utils_ip_is_site_local(AF_INET, &vpn_gw)) { + has_parent_gw = TRUE; + } else if ((obj = nm_device_get_best_default_route(parent_device, AF_INET)) + && !NMP_OBJECT_CAST_IP4_ROUTE(obj)->gateway) { + has_parent_gw = TRUE; + } + } + } + } + + if (!has_parent_gw) + return; + + route_metric = nm_device_get_route_metric(parent_device, AF_INET); + + memset(&route, 0, sizeof(route)); + route.ifindex = ifindex; + route.network = vpn_gw; + route.plen = 32; + route.gateway = parent_gw; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + route.metric = route_metric; + nm_ip4_config_add_route(config, &route, NULL); + + if (parent_gw) { + /* Ensure there's a route to the parent device's gateway through the + * parent device, since if the VPN claims the default route and the VPN + * routes include a subnet that matches the parent device's subnet, + * the parent device's gateway would get routed through the VPN and fail. + */ + memset(&route, 0, sizeof(route)); + route.network = parent_gw; + route.plen = 32; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + route.metric = route_metric; + nm_ip4_config_add_route(config, &route, NULL); + } +} + +static void +add_ip6_vpn_gateway_route(NMIP6Config * config, + NMDevice * parent_device, + const struct in6_addr *vpn_gw, + NMPlatform * platform) +{ + const struct in6_addr *parent_gw = NULL; + gboolean has_parent_gw = FALSE; + NMPlatformIP6Route route; + int ifindex; + guint32 route_metric; + nm_auto_nmpobj const NMPObject *route_resolved = NULL; + + g_return_if_fail(NM_IS_IP6_CONFIG(config)); + g_return_if_fail(NM_IS_DEVICE(parent_device)); + g_return_if_fail(vpn_gw != NULL); + + ifindex = nm_ip6_config_get_ifindex(config); + + nm_assert(ifindex > 0); + nm_assert(ifindex == nm_device_get_ip_ifindex(parent_device)); + + /* Ask kernel how to reach @vpn_gw. We can only inject the route in + * @parent_device, so whatever we resolve, it can only be on @ifindex. */ + if (nm_platform_ip_route_get(platform, + AF_INET6, + vpn_gw, + ifindex, + (NMPObject **) &route_resolved) + >= 0) { + const NMPlatformIP6Route *r = NMP_OBJECT_CAST_IP6_ROUTE(route_resolved); + + if (r->ifindex == ifindex) { + const NMPObject *obj; + + /* `ip route get` always resolves the route, even if the destination is unreachable. + * In which case, it pretends the destination is directly reachable. + * + * So, only accept direct routes if @vpn_gw is a private network + * or if the parent device also has a direct default route */ + if (nm_platform_route_table_is_main(r->table_coerced)) { + if (!IN6_IS_ADDR_UNSPECIFIED(&r->gateway)) { + parent_gw = &r->gateway; + has_parent_gw = TRUE; + } else if (nm_utils_ip_is_site_local(AF_INET6, &vpn_gw)) { + has_parent_gw = TRUE; + } else if ((obj = nm_device_get_best_default_route(parent_device, AF_INET6)) + && IN6_IS_ADDR_UNSPECIFIED(&NMP_OBJECT_CAST_IP6_ROUTE(obj)->gateway)) { + has_parent_gw = TRUE; + } + } + } + } + + if (!has_parent_gw) + return; + + route_metric = nm_device_get_route_metric(parent_device, AF_INET6); + + memset(&route, 0, sizeof(route)); + route.ifindex = ifindex; + route.network = *vpn_gw; + route.plen = 128; + if (parent_gw) + route.gateway = *parent_gw; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + route.metric = route_metric; + nm_ip6_config_add_route(config, &route, NULL); + + /* Ensure there's a route to the parent device's gateway through the + * parent device, since if the VPN claims the default route and the VPN + * routes include a subnet that matches the parent device's subnet, + * the parent device's gateway would get routed through the VPN and fail. + */ + if (parent_gw && !IN6_IS_ADDR_UNSPECIFIED(parent_gw)) { + memset(&route, 0, sizeof(route)); + route.network = *parent_gw; + route.plen = 128; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + route.metric = route_metric; + nm_ip6_config_add_route(config, &route, NULL); + } +} + +NMVpnConnection * +nm_vpn_connection_new(NMSettingsConnection * settings_connection, + NMDevice * parent_device, + const char * specific_object, + NMActivationReason activation_reason, + NMActivationStateFlags initial_state_flags, + NMAuthSubject * subject) +{ + g_return_val_if_fail(!settings_connection || NM_IS_SETTINGS_CONNECTION(settings_connection), + NULL); + g_return_val_if_fail(NM_IS_DEVICE(parent_device), NULL); + g_return_val_if_fail(specific_object, NULL); + + return g_object_new(NM_TYPE_VPN_CONNECTION, + NM_ACTIVE_CONNECTION_INT_SETTINGS_CONNECTION, + settings_connection, + NM_ACTIVE_CONNECTION_INT_DEVICE, + parent_device, + NM_ACTIVE_CONNECTION_SPECIFIC_OBJECT, + specific_object, + NM_ACTIVE_CONNECTION_INT_SUBJECT, + subject, + NM_ACTIVE_CONNECTION_INT_ACTIVATION_REASON, + activation_reason, + NM_ACTIVE_CONNECTION_VPN, + TRUE, + NM_ACTIVE_CONNECTION_STATE_FLAGS, + (guint) initial_state_flags, + NULL); +} + +const char * +nm_vpn_connection_get_service(NMVpnConnection *self) +{ + NMSettingVpn *s_vpn; + + s_vpn = nm_connection_get_setting_vpn(_get_applied_connection(self)); + return nm_setting_vpn_get_service_type(s_vpn); +} + +static NM_UTILS_LOOKUP_STR_DEFINE( + _vpn_plugin_failure_to_string, + NMVpnPluginFailure, + NM_UTILS_LOOKUP_DEFAULT(NULL), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED, "login-failed"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED, "connect-failed"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_PLUGIN_FAILURE_BAD_IP_CONFIG, "bad-ip-config"), ); + +#define vpn_plugin_failure_to_string_a(failure) \ + NM_UTILS_LOOKUP_STR_A(_vpn_plugin_failure_to_string, failure) + +static void +plugin_failed(NMVpnConnection *self, guint reason) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + _LOGW("VPN plugin: failed: %s (%d)", vpn_plugin_failure_to_string_a(reason), reason); + + switch (reason) { + case NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED: + priv->failure_reason = NM_ACTIVE_CONNECTION_STATE_REASON_LOGIN_FAILED; + break; + case NM_VPN_PLUGIN_FAILURE_BAD_IP_CONFIG: + priv->failure_reason = NM_ACTIVE_CONNECTION_STATE_REASON_IP_CONFIG_INVALID; + break; + default: + priv->failure_reason = NM_ACTIVE_CONNECTION_STATE_REASON_UNKNOWN; + break; + } +} + +static NM_UTILS_LOOKUP_STR_DEFINE( + _vpn_service_state_to_string, + NMVpnServiceState, + NM_UTILS_LOOKUP_DEFAULT(NULL), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_UNKNOWN, "unknown"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_INIT, "init"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_SHUTDOWN, "shutdown"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_STARTING, "starting"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_STARTED, "started"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_STOPPING, "stopping"), + NM_UTILS_LOOKUP_STR_ITEM(NM_VPN_SERVICE_STATE_STOPPED, "stopped"), ); + +#define vpn_service_state_to_string_a(state) \ + NM_UTILS_LOOKUP_STR_A(_vpn_service_state_to_string, state) + +static NM_UTILS_LOOKUP_STR_DEFINE(_vpn_state_to_string, + VpnState, + NM_UTILS_LOOKUP_DEFAULT(NULL), + NM_UTILS_LOOKUP_STR_ITEM(STATE_UNKNOWN, "unknown"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_WAITING, "waiting"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_PREPARE, "prepare"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_NEED_AUTH, "need-auth"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_CONNECT, "connect"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_IP_CONFIG_GET, "ip-config-get"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_PRE_UP, "pre-up"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_ACTIVATED, "activated"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_DEACTIVATING, "deactivating"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_DISCONNECTED, "disconnected"), + NM_UTILS_LOOKUP_STR_ITEM(STATE_FAILED, "failed"), ); + +#define vpn_state_to_string_a(state) NM_UTILS_LOOKUP_STR_A(_vpn_state_to_string, state) + +static void +plugin_state_changed(NMVpnConnection *self, NMVpnServiceState new_service_state) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMVpnServiceState old_service_state = priv->service_state; + + _LOGI("VPN plugin: state changed: %s (%d)", + vpn_service_state_to_string_a(new_service_state), + new_service_state); + priv->service_state = new_service_state; + + if (new_service_state == NM_VPN_SERVICE_STATE_STOPPED) { + /* Clear connection secrets to ensure secrets get requested each time the + * connection is activated. + */ + nm_active_connection_clear_secrets(NM_ACTIVE_CONNECTION(self)); + + if ((priv->vpn_state >= STATE_WAITING) && (priv->vpn_state <= STATE_ACTIVATED)) { + VpnState old_state = priv->vpn_state; + + _set_vpn_state(self, STATE_FAILED, priv->failure_reason, FALSE); + + /* Reset the failure reason */ + priv->failure_reason = NM_ACTIVE_CONNECTION_STATE_REASON_UNKNOWN; + + /* If the connection failed, the service cannot persist, but the + * connection can persist, ask listeners to re-activate the connection. + */ + if (old_state == STATE_ACTIVATED && priv->vpn_state == STATE_FAILED + && _connection_only_can_persist(self)) + g_signal_emit(self, signals[INTERNAL_RETRY_AFTER_FAILURE], 0); + } + } else if (new_service_state == NM_VPN_SERVICE_STATE_STARTING + && old_service_state == NM_VPN_SERVICE_STATE_STARTED) { + /* The VPN service got disconnected and is attempting to reconnect */ + _set_vpn_state(self, + STATE_CONNECT, + NM_ACTIVE_CONNECTION_STATE_REASON_CONNECT_TIMEOUT, + FALSE); + } +} + +static void +print_vpn_config(NMVpnConnection *self) +{ + NMVpnConnectionPrivate * priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + const NMPlatformIP4Address *address4; + const NMPlatformIP6Address *address6; + char * dns_domain = NULL; + guint32 num, i; + char b1[NM_UTILS_INET_ADDRSTRLEN]; + char b2[NM_UTILS_INET_ADDRSTRLEN]; + NMDedupMultiIter ipconf_iter; + + if (priv->ip4_external_gw) { + _LOGI("Data: VPN Gateway: %s", _nm_utils_inet4_ntop(priv->ip4_external_gw, b1)); + } else if (priv->ip6_external_gw) { + _LOGI("Data: VPN Gateway: %s", _nm_utils_inet6_ntop(priv->ip6_external_gw, b1)); + } + + _LOGI("Data: Tunnel Device: %s%s%s", NM_PRINT_FMT_QUOTE_STRING(priv->ip_iface)); + + if (priv->ip4_config) { + const NMPlatformIP4Route *route; + + _LOGI("Data: IPv4 configuration:"); + + address4 = nm_ip4_config_get_first_address(priv->ip4_config); + nm_assert(address4); + + if (priv->ip4_internal_gw) + _LOGI("Data: Internal Gateway: %s", _nm_utils_inet4_ntop(priv->ip4_internal_gw, b1)); + _LOGI("Data: Internal Address: %s", + address4 ? _nm_utils_inet4_ntop(address4->address, b1) : "??"); + _LOGI("Data: Internal Prefix: %d", address4 ? (int) address4->plen : -1); + _LOGI("Data: Internal Point-to-Point Address: %s", + _nm_utils_inet4_ntop(address4->peer_address, b1)); + + nm_ip_config_iter_ip4_route_for_each (&ipconf_iter, priv->ip4_config, &route) { + _LOGI("Data: Static Route: %s/%d Next Hop: %s", + _nm_utils_inet4_ntop(route->network, b1), + route->plen, + _nm_utils_inet4_ntop(route->gateway, b2)); + } + + num = nm_ip4_config_get_num_nameservers(priv->ip4_config); + for (i = 0; i < num; i++) { + _LOGI("Data: Internal DNS: %s", + _nm_utils_inet4_ntop(nm_ip4_config_get_nameserver(priv->ip4_config, i), b1)); + } + + if (nm_ip4_config_get_num_domains(priv->ip4_config) > 0) + dns_domain = (char *) nm_ip4_config_get_domain(priv->ip4_config, 0); + + _LOGI("Data: DNS Domain: '%s'", dns_domain ?: "(none)"); + } else + _LOGI("Data: No IPv4 configuration"); + + if (priv->ip6_config) { + const NMPlatformIP6Route *route; + + _LOGI("Data: IPv6 configuration:"); + + address6 = nm_ip6_config_get_first_address(priv->ip6_config); + nm_assert(address6); + + if (priv->ip6_internal_gw) + _LOGI("Data: Internal Gateway: %s", _nm_utils_inet6_ntop(priv->ip6_internal_gw, b1)); + _LOGI("Data: Internal Address: %s", _nm_utils_inet6_ntop(&address6->address, b1)); + _LOGI("Data: Internal Prefix: %d", address6->plen); + _LOGI("Data: Internal Point-to-Point Address: %s", + _nm_utils_inet6_ntop(&address6->peer_address, b1)); + + nm_ip_config_iter_ip6_route_for_each (&ipconf_iter, priv->ip6_config, &route) { + _LOGI("Data: Static Route: %s/%d Next Hop: %s", + _nm_utils_inet6_ntop(&route->network, b1), + route->plen, + _nm_utils_inet6_ntop(&route->gateway, b2)); + } + + num = nm_ip6_config_get_num_nameservers(priv->ip6_config); + for (i = 0; i < num; i++) { + _LOGI("Data: Internal DNS: %s", + _nm_utils_inet6_ntop(nm_ip6_config_get_nameserver(priv->ip6_config, i), b1)); + } + + if (nm_ip6_config_get_num_domains(priv->ip6_config) > 0) + dns_domain = (char *) nm_ip6_config_get_domain(priv->ip6_config, 0); + + _LOGI("Data: DNS Domain: '%s'", dns_domain ?: "(none)"); + } else + _LOGI("Data: No IPv6 configuration"); + + if (priv->banner && strlen(priv->banner)) { + _LOGI("Data: Login Banner:"); + _LOGI("Data: -----------------------------------------"); + _LOGI("Data: %s", priv->banner); + _LOGI("Data: -----------------------------------------"); + } +} + +static void +apply_parent_device_config(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMDevice * parent_dev = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(self)); + int ifindex; + NMIP4Config *vpn4_parent_config = NULL; + NMIP6Config *vpn6_parent_config = NULL; + + ifindex = nm_device_get_ip_ifindex(parent_dev); + if (ifindex > 0) { + /* If the VPN didn't return a network interface, it is a route-based + * VPN (like kernel IPSec) and all IP addressing and routing should + * be done on the parent interface instead. + */ + if (priv->ip4_config) { + vpn4_parent_config = nm_ip4_config_new(nm_netns_get_multi_idx(priv->netns), ifindex); + if (priv->ip_ifindex <= 0) + nm_ip4_config_merge(vpn4_parent_config, + priv->ip4_config, + NM_IP_CONFIG_MERGE_NO_DNS, + 0); + } + if (priv->ip6_config) { + vpn6_parent_config = nm_ip6_config_new(nm_netns_get_multi_idx(priv->netns), ifindex); + if (priv->ip_ifindex <= 0) + nm_ip6_config_merge(vpn6_parent_config, + priv->ip6_config, + NM_IP_CONFIG_MERGE_NO_DNS, + 0); + } + } + + /* Add any explicit route to the VPN gateway through the parent device */ + if (vpn4_parent_config && priv->ip4_external_gw) { + add_ip4_vpn_gateway_route(vpn4_parent_config, + parent_dev, + priv->ip4_external_gw, + nm_netns_get_platform(priv->netns)); + } + if (vpn6_parent_config && priv->ip6_external_gw) { + add_ip6_vpn_gateway_route(vpn6_parent_config, + parent_dev, + priv->ip6_external_gw, + nm_netns_get_platform(priv->netns)); + } + + nm_device_replace_vpn4_config(parent_dev, priv->last_device_ip4_config, vpn4_parent_config); + g_clear_object(&priv->last_device_ip4_config); + priv->last_device_ip4_config = vpn4_parent_config; + + nm_device_replace_vpn6_config(parent_dev, priv->last_device_ip6_config, vpn6_parent_config); + g_clear_object(&priv->last_device_ip6_config); + priv->last_device_ip6_config = vpn6_parent_config; +} + +static gboolean +nm_vpn_connection_apply_config(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + apply_parent_device_config(self); + + if (priv->ip_ifindex > 0) { + nm_platform_link_set_up(nm_netns_get_platform(priv->netns), priv->ip_ifindex, NULL); + + if (priv->ip4_config) { + nm_assert(priv->ip_ifindex == nm_ip4_config_get_ifindex(priv->ip4_config)); + if (!nm_ip4_config_commit(priv->ip4_config, + nm_netns_get_platform(priv->netns), + get_route_table(self, AF_INET, FALSE) + ? NM_IP_ROUTE_TABLE_SYNC_MODE_FULL + : NM_IP_ROUTE_TABLE_SYNC_MODE_MAIN)) + return FALSE; + nm_platform_ip4_dev_route_blacklist_set(nm_netns_get_platform(priv->netns), + priv->ip_ifindex, + priv->ip4_dev_route_blacklist); + } + + if (priv->ip6_config) { + nm_assert(priv->ip_ifindex == nm_ip6_config_get_ifindex(priv->ip6_config)); + if (!nm_ip6_config_commit(priv->ip6_config, + nm_netns_get_platform(priv->netns), + get_route_table(self, AF_INET6, FALSE) + ? NM_IP_ROUTE_TABLE_SYNC_MODE_FULL + : NM_IP_ROUTE_TABLE_SYNC_MODE_MAIN, + NULL)) + return FALSE; + } + + if (priv->mtu + && priv->mtu + != nm_platform_link_get_mtu(nm_netns_get_platform(priv->netns), + priv->ip_ifindex)) + nm_platform_link_set_mtu(nm_netns_get_platform(priv->netns), + priv->ip_ifindex, + priv->mtu); + } + + _LOGI("VPN connection: (IP Config Get) complete"); + if (priv->vpn_state < STATE_PRE_UP) + _set_vpn_state(self, STATE_PRE_UP, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + return TRUE; +} + +static void +_cleanup_failed_config(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + nm_dbus_object_clear_and_unexport(&priv->ip4_config); + nm_dbus_object_clear_and_unexport(&priv->ip6_config); + + _LOGW("VPN connection: did not receive valid IP config information"); + _set_vpn_state(self, STATE_FAILED, NM_ACTIVE_CONNECTION_STATE_REASON_IP_CONFIG_INVALID, FALSE); +} + +static void +fw_change_zone_cb(NMFirewallManager * firewall_manager, + NMFirewallManagerCallId *call_id, + GError * error, + gpointer user_data) +{ + NMVpnConnection * self = user_data; + NMVpnConnectionPrivate *priv; + + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + g_return_if_fail(priv->fw_call == call_id); + + priv->fw_call = NULL; + + if (nm_utils_error_is_cancelled(error)) + return; + + if (error) { + // FIXME: fail the activation? + } + + if (!nm_vpn_connection_apply_config(self)) + _cleanup_failed_config(self); +} + +static void +nm_vpn_connection_config_maybe_complete(NMVpnConnection *self, gboolean success) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMConnection * base_con; + NMSettingConnection * s_con; + const char * zone; + + if (priv->vpn_state < STATE_IP_CONFIG_GET || priv->vpn_state > STATE_ACTIVATED) + return; + + if (success) { + if ((priv->has_ip4 && !priv->ip4_config) || (priv->has_ip6 && !priv->ip6_config)) { + /* Need to wait for other config */ + return; + } + } + + nm_clear_g_source(&priv->connect_timeout); + + if (success) { + print_vpn_config(self); + + /* Add the tunnel interface to the specified firewall zone */ + if (priv->ip_iface) { + base_con = _get_applied_connection(self); + s_con = nm_connection_get_setting_connection(base_con); + zone = nm_setting_connection_get_zone(s_con); + + _LOGD("setting firewall zone %s%s%s for '%s'", + NM_PRINT_FMT_QUOTED(zone, "'", zone, "'", "(default)"), + priv->ip_iface); + fw_call_cleanup(self); + priv->fw_call = nm_firewall_manager_add_or_change_zone(nm_firewall_manager_get(), + priv->ip_iface, + zone, + FALSE, + fw_change_zone_cb, + self); + return; + } else if (nm_vpn_connection_apply_config(self)) + return; + } + + _cleanup_failed_config(self); +} + +static gboolean +ip6_addr_from_variant(GVariant *v, struct in6_addr *addr) +{ + const guint8 *bytes; + gsize len; + + g_return_val_if_fail(v, FALSE); + g_return_val_if_fail(addr, FALSE); + + if (g_variant_is_of_type(v, G_VARIANT_TYPE("ay"))) { + bytes = g_variant_get_fixed_array(v, &len, sizeof(guint8)); + if (len == sizeof(struct in6_addr) && !IN6_IS_ADDR_UNSPECIFIED(bytes)) { + memcpy(addr, bytes, len); + return TRUE; + } + } + return FALSE; +} + +static struct in6_addr * +ip6_addr_dup_from_variant(GVariant *v) +{ + struct in6_addr *addr; + + addr = g_malloc0(sizeof(*addr)); + if (ip6_addr_from_variant(v, addr)) + return addr; + g_free(addr); + return NULL; +} + +static gboolean +process_generic_config(NMVpnConnection *self, GVariant *dict) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + const char * str; + GVariant * v; + guint32 u32; + gboolean b; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CAN_PERSIST, "b", &b) && b) { + /* Defaults to FALSE, so only let service indicate TRUE */ + priv->service_can_persist = TRUE; + } + + nm_clear_g_free(&priv->ip_iface); + priv->ip_ifindex = 0; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_TUNDEV, "&s", &str)) { + /* Backwards compat with NM-openswan */ + if (g_strcmp0(str, "_none_") != 0) + priv->ip_iface = g_strdup(str); + } + + if (priv->ip_iface) { + /* Grab the interface index for address/routing operations */ + priv->ip_ifindex = + nm_platform_link_get_ifindex(nm_netns_get_platform(priv->netns), priv->ip_iface); + if (priv->ip_ifindex <= 0) { + nm_platform_process_events(nm_netns_get_platform(priv->netns)); + priv->ip_ifindex = + nm_platform_link_get_ifindex(nm_netns_get_platform(priv->netns), priv->ip_iface); + } + if (priv->ip_ifindex <= 0) { + _LOGE("failed to look up VPN interface index for \"%s\"", priv->ip_iface); + nm_clear_g_free(&priv->ip_iface); + priv->ip_ifindex = 0; + nm_vpn_connection_config_maybe_complete(self, FALSE); + return FALSE; + } + } + + nm_clear_g_free(&priv->banner); + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_BANNER, "&s", &str)) { + priv->banner = g_strdup(str); + _notify(self, PROP_BANNER); + } + + /* Proxy Config */ + g_clear_object(&priv->proxy_config); + priv->proxy_config = nm_proxy_config_new(); + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_PROXY_PAC, "&s", &str)) { + nm_proxy_config_set_method(priv->proxy_config, NM_PROXY_CONFIG_METHOD_AUTO); + nm_proxy_config_set_pac_url(priv->proxy_config, str); + } else + nm_proxy_config_set_method(priv->proxy_config, NM_PROXY_CONFIG_METHOD_NONE); + + /* User overrides if any from the NMConnection's Proxy settings */ + nm_proxy_config_merge_setting(priv->proxy_config, + nm_connection_get_setting_proxy(_get_applied_connection(self))); + + /* External world-visible address of the VPN server */ + priv->ip4_external_gw = 0; + nm_clear_g_free(&priv->ip6_external_gw); + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_EXT_GATEWAY, "u", &u32)) { + priv->ip4_external_gw = u32; + } else if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_EXT_GATEWAY, "@ay", &v)) { + priv->ip6_external_gw = ip6_addr_dup_from_variant(v); + g_variant_unref(v); + + if (!priv->ip6_external_gw) { + _LOGE("Invalid IPv6 VPN gateway address received"); + nm_vpn_connection_config_maybe_complete(self, FALSE); + return FALSE; + } + } + + priv->mtu = 0; + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_MTU, "u", &u32)) + priv->mtu = u32; + + return TRUE; +} + +static void +nm_vpn_connection_config_get(NMVpnConnection *self, GVariant *dict) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + gboolean b; + + g_return_if_fail(dict && g_variant_is_of_type(dict, G_VARIANT_TYPE_VARDICT)); + + _LOGI("VPN connection: (IP Config Get) reply received."); + + if (priv->vpn_state == STATE_CONNECT) + _set_vpn_state(self, STATE_IP_CONFIG_GET, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + + if (!process_generic_config(self, dict)) + return; + + /* Note whether to expect IPv4 and IPv6 configs */ + priv->has_ip4 = FALSE; + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_HAS_IP4, "b", &b)) + priv->has_ip4 = b; + nm_dbus_object_clear_and_unexport(&priv->ip4_config); + + priv->has_ip6 = FALSE; + if (g_variant_lookup(dict, NM_VPN_PLUGIN_CONFIG_HAS_IP6, "b", &b)) + priv->has_ip6 = b; + nm_dbus_object_clear_and_unexport(&priv->ip6_config); + + nm_vpn_connection_config_maybe_complete(self, TRUE); +} + +guint32 +nm_vpn_connection_get_ip4_route_metric(NMVpnConnection *self) +{ + gint64 route_metric; + NMConnection *applied; + + applied = _get_applied_connection(self); + route_metric = + nm_setting_ip_config_get_route_metric(nm_connection_get_setting_ip4_config(applied)); + + return (route_metric >= 0) ? route_metric : NM_VPN_ROUTE_METRIC_DEFAULT; +} + +guint32 +nm_vpn_connection_get_ip6_route_metric(NMVpnConnection *self) +{ + gint64 route_metric; + NMConnection *applied; + + applied = _get_applied_connection(self); + route_metric = + nm_setting_ip_config_get_route_metric(nm_connection_get_setting_ip6_config(applied)); + + return (route_metric >= 0) ? route_metric : NM_VPN_ROUTE_METRIC_DEFAULT; +} + +static guint32 +get_route_table(NMVpnConnection *self, int addr_family, gboolean fallback_main) +{ + NMConnection * connection; + NMSettingIPConfig *s_ip; + guint32 route_table = 0; + + nm_assert(NM_IN_SET(addr_family, AF_INET, AF_INET6)); + + connection = _get_applied_connection(self); + if (connection) { + s_ip = nm_connection_get_setting_ip_config(connection, addr_family); + if (s_ip) + route_table = nm_setting_ip_config_get_route_table(s_ip); + } + + return route_table ?: (fallback_main ? RT_TABLE_MAIN : 0); +} + +static gboolean +_is_device_vrf(NMVpnConnection *self) +{ + NMDevice *parent; + NMDevice *master; + + parent = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(self)); + if (!parent) + return FALSE; + + master = nm_device_get_master(parent); + return master && nm_device_get_link_type(master) == NM_LINK_TYPE_VRF; +} + +static void +nm_vpn_connection_ip4_config_get(NMVpnConnection *self, GVariant *dict) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMPlatformIP4Address address; + guint32 u32, route_metric; + NMSettingIPConfig * s_ip; + NMSettingConnection * s_con; + guint32 route_table; + NMIP4Config * config; + GVariantIter * iter; + const char * str; + GVariant * v; + gboolean b; + int ip_ifindex; + guint32 mss = 0; + gboolean never_default = FALSE; + + g_return_if_fail(dict && g_variant_is_of_type(dict, G_VARIANT_TYPE_VARDICT)); + + if (priv->vpn_state == STATE_CONNECT) + _set_vpn_state(self, STATE_IP_CONFIG_GET, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + + if (priv->vpn_state > STATE_ACTIVATED) { + _LOGI("VPN connection: (IP4 Config Get) ignoring, the connection is no longer active"); + return; + } + + if (priv->has_ip4) { + _LOGI("VPN connection: (IP4 Config Get) reply received"); + + if (g_variant_n_children(dict) == 0) { + priv->has_ip4 = FALSE; + nm_vpn_connection_config_maybe_complete(self, TRUE); + return; + } + } else { + _LOGI("VPN connection: (IP4 Config Get) reply received from old-style plugin"); + + /* In the old API, the generic and IPv4 configuration items + * were mixed together. + */ + if (!process_generic_config(self, dict)) + return; + + priv->has_ip4 = TRUE; + priv->has_ip6 = FALSE; + } + + ip_ifindex = nm_vpn_connection_get_ip_ifindex(self, TRUE); + if (ip_ifindex <= 0) + g_return_if_reached(); + + config = nm_ip4_config_new(nm_netns_get_multi_idx(priv->netns), ip_ifindex); + nm_ip4_config_set_dns_priority(config, NM_DNS_PRIORITY_DEFAULT_VPN); + + memset(&address, 0, sizeof(address)); + address.plen = 24; + + /* Internal address of the VPN subnet's gateway */ + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_INT_GATEWAY, "u", &u32)) + priv->ip4_internal_gw = u32; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_ADDRESS, "u", &u32)) + address.address = u32; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_PTP, "u", &u32)) + address.peer_address = u32; + else + address.peer_address = address.address; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_PREFIX, "u", &u32)) + address.plen = u32; + + if (address.address && address.plen && address.plen <= 32) { + address.addr_source = NM_IP_CONFIG_SOURCE_VPN; + nm_ip4_config_add_address(config, &address); + } else { + _LOGW("invalid IP4 config received!"); + g_object_unref(config); + nm_vpn_connection_config_maybe_complete(self, FALSE); + return; + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_DNS, "au", &iter)) { + while (g_variant_iter_next(iter, "u", &u32)) + nm_ip4_config_add_nameserver(config, u32); + g_variant_iter_free(iter); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_NBNS, "au", &iter)) { + while (g_variant_iter_next(iter, "u", &u32)) + nm_ip4_config_add_wins(config, u32); + g_variant_iter_free(iter); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_MSS, "u", &u32)) + mss = u32; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_DOMAIN, "&s", &str)) + nm_ip4_config_add_domain(config, str); + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_DOMAINS, "as", &iter)) { + while (g_variant_iter_next(iter, "&s", &str)) + nm_ip4_config_add_domain(config, str); + g_variant_iter_free(iter); + } + + route_table = get_route_table(self, AF_INET, TRUE); + route_metric = nm_vpn_connection_get_ip4_route_metric(self); + s_ip = nm_connection_get_setting_ip4_config(_get_applied_connection(self)); + s_con = nm_connection_get_setting_connection(_get_applied_connection(self)); + + if (nm_setting_ip_config_get_ignore_auto_routes(s_ip)) { + /* ignore VPN routes */ + } else if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_PRESERVE_ROUTES, "b", &b) && b) { + if (priv->ip4_config) { + NMDedupMultiIter ipconf_iter; + const NMPlatformIP4Route *route; + + nm_ip_config_iter_ip4_route_for_each (&ipconf_iter, priv->ip4_config, &route) + nm_ip4_config_add_route(config, route, NULL); + } + } else if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_ROUTES, "aau", &iter)) { + while (g_variant_iter_next(iter, "@au", &v)) { + NMPlatformIP4Route route = { + 0, + }; + guint32 plen; + + switch (g_variant_n_children(v)) { + case 5: + g_variant_get_child(v, 4, "u", &route.pref_src); + /* fall-through */ + case 4: + g_variant_get_child(v, 0, "u", &route.network); + g_variant_get_child(v, 1, "u", &plen); + g_variant_get_child(v, 2, "u", &route.gateway); + /* 4th item is unused route metric */ + route.table_coerced = nm_platform_route_table_coerce(route_table); + route.metric = route_metric; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + + if (plen > 32 || plen == 0) + break; + route.plen = plen; + route.network = nm_utils_ip4_address_clear_host_address(route.network, plen); + + if (priv->ip4_external_gw && route.network == priv->ip4_external_gw + && route.plen == 32) { + /* Ignore host routes to the VPN gateway since NM adds one itself + * below. Since NM knows more about the routing situation than + * the VPN server, we want to use the NM created route instead of + * whatever the server provides. + */ + break; + } + + nm_ip4_config_add_route(config, &route, NULL); + break; + default: + break; + } + g_variant_unref(v); + } + g_variant_iter_free(iter); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP4_CONFIG_NEVER_DEFAULT, "b", &b)) + never_default = b; + + /* Merge in user overrides from the NMConnection's IPv4 setting */ + nm_ip4_config_merge_setting(config, + s_ip, + nm_setting_connection_get_mdns(s_con), + nm_setting_connection_get_llmnr(s_con), + route_table, + route_metric); + + if (!never_default && !nm_setting_ip_config_get_never_default(s_ip)) { + const NMPlatformIP4Route r = { + .ifindex = ip_ifindex, + .rt_source = NM_IP_CONFIG_SOURCE_VPN, + .gateway = priv->ip4_internal_gw, + .table_coerced = nm_platform_route_table_coerce(route_table), + .metric = route_metric, + .mss = mss, + }; + + nm_ip4_config_add_route(config, &r, NULL); + } + + nm_clear_pointer(&priv->ip4_dev_route_blacklist, g_ptr_array_unref); + + nm_ip4_config_add_dependent_routes(config, + route_table, + nm_vpn_connection_get_ip4_route_metric(self), + _is_device_vrf(self), + &priv->ip4_dev_route_blacklist); + + if (priv->ip4_config) { + nm_ip4_config_replace(priv->ip4_config, config, NULL); + g_object_unref(config); + } else { + priv->ip4_config = config; + nm_dbus_object_export(NM_DBUS_OBJECT(config)); + g_object_notify((GObject *) self, NM_ACTIVE_CONNECTION_IP4_CONFIG); + } + + nm_vpn_connection_config_maybe_complete(self, TRUE); +} + +static void +nm_vpn_connection_ip6_config_get(NMVpnConnection *self, GVariant *dict) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMPlatformIP6Address address; + guint32 u32, route_metric; + NMSettingIPConfig * s_ip; + guint32 route_table; + NMIP6Config * config; + GVariantIter * iter; + const char * str; + GVariant * v; + gboolean b; + int ip_ifindex; + guint32 mss = 0; + gboolean never_default = FALSE; + + g_return_if_fail(dict && g_variant_is_of_type(dict, G_VARIANT_TYPE_VARDICT)); + + _LOGI("VPN connection: (IP6 Config Get) reply received"); + + if (priv->vpn_state == STATE_CONNECT) + _set_vpn_state(self, STATE_IP_CONFIG_GET, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + + if (priv->vpn_state > STATE_ACTIVATED) { + _LOGI("VPN connection: (IP6 Config Get) ignoring, the connection is no longer active"); + return; + } + + if (g_variant_n_children(dict) == 0) { + priv->has_ip6 = FALSE; + nm_vpn_connection_config_maybe_complete(self, TRUE); + return; + } + + ip_ifindex = nm_vpn_connection_get_ip_ifindex(self, TRUE); + if (ip_ifindex <= 0) + g_return_if_reached(); + + config = nm_ip6_config_new(nm_netns_get_multi_idx(priv->netns), ip_ifindex); + nm_ip6_config_set_dns_priority(config, NM_DNS_PRIORITY_DEFAULT_VPN); + + memset(&address, 0, sizeof(address)); + address.plen = 128; + + /* Internal address of the VPN subnet's gateway */ + nm_clear_g_free(&priv->ip6_internal_gw); + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_INT_GATEWAY, "@ay", &v)) { + priv->ip6_internal_gw = ip6_addr_dup_from_variant(v); + g_variant_unref(v); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_ADDRESS, "@ay", &v)) { + ip6_addr_from_variant(v, &address.address); + g_variant_unref(v); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_PTP, "@ay", &v)) { + ip6_addr_from_variant(v, &address.peer_address); + g_variant_unref(v); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_PREFIX, "u", &u32)) + address.plen = u32; + + if (!IN6_IS_ADDR_UNSPECIFIED(&address.address) && address.plen && address.plen <= 128) { + address.addr_source = NM_IP_CONFIG_SOURCE_VPN; + nm_ip6_config_add_address(config, &address); + } else { + _LOGW("invalid IP6 config received!"); + g_object_unref(config); + nm_vpn_connection_config_maybe_complete(self, FALSE); + return; + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_DNS, "aay", &iter)) { + while (g_variant_iter_next(iter, "@ay", &v)) { + struct in6_addr dns; + + if (ip6_addr_from_variant(v, &dns)) + nm_ip6_config_add_nameserver(config, &dns); + g_variant_unref(v); + } + g_variant_iter_free(iter); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_MSS, "u", &u32)) + mss = u32; + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_DOMAIN, "&s", &str)) + nm_ip6_config_add_domain(config, str); + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_DOMAINS, "as", &iter)) { + while (g_variant_iter_next(iter, "&s", &str)) + nm_ip6_config_add_domain(config, str); + g_variant_iter_free(iter); + } + + route_table = get_route_table(self, AF_INET6, TRUE); + route_metric = nm_vpn_connection_get_ip6_route_metric(self); + s_ip = nm_connection_get_setting_ip6_config(_get_applied_connection(self)); + + if (nm_setting_ip_config_get_ignore_auto_routes(s_ip)) { + /* Ignore VPN routes */ + } else if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_PRESERVE_ROUTES, "b", &b) && b) { + if (priv->ip6_config) { + NMDedupMultiIter ipconf_iter; + const NMPlatformIP6Route *route; + + nm_ip_config_iter_ip6_route_for_each (&ipconf_iter, priv->ip6_config, &route) + nm_ip6_config_add_route(config, route, NULL); + } + } else if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_ROUTES, "a(ayuayu)", &iter)) { + GVariant *dest, *next_hop; + guint32 prefix, metric; + + while (g_variant_iter_next(iter, "(@ayu@ayu)", &dest, &prefix, &next_hop, &metric)) { + NMPlatformIP6Route route; + + memset(&route, 0, sizeof(route)); + + if (!ip6_addr_from_variant(dest, &route.network)) + goto next; + + if (prefix > 128 || prefix == 0) + goto next; + + route.plen = prefix; + ip6_addr_from_variant(next_hop, &route.gateway); + route.table_coerced = nm_platform_route_table_coerce(route_table); + route.metric = route_metric; + route.rt_source = NM_IP_CONFIG_SOURCE_VPN; + + nm_utils_ip6_address_clear_host_address(&route.network, &route.network, route.plen); + + if (priv->ip6_external_gw && IN6_ARE_ADDR_EQUAL(&route.network, priv->ip6_external_gw) + && route.plen == 128) { + /* Ignore host routes to the VPN gateway since NM adds one itself. + * Since NM knows more about the routing situation than the VPN + * server, we want to use the NM created route instead of whatever + * the server provides. + */ + goto next; + } + + nm_ip6_config_add_route(config, &route, NULL); + +next: + g_variant_unref(dest); + g_variant_unref(next_hop); + } + g_variant_iter_free(iter); + } + + if (g_variant_lookup(dict, NM_VPN_PLUGIN_IP6_CONFIG_NEVER_DEFAULT, "b", &b)) + never_default = b; + + /* Merge in user overrides from the NMConnection's IPv6 setting */ + nm_ip6_config_merge_setting(config, s_ip, route_table, route_metric); + + if (!never_default && !nm_setting_ip_config_get_never_default(s_ip)) { + const NMPlatformIP6Route r = { + .ifindex = ip_ifindex, + .rt_source = NM_IP_CONFIG_SOURCE_VPN, + .gateway = *(priv->ip6_internal_gw ?: &in6addr_any), + .table_coerced = nm_platform_route_table_coerce(route_table), + .metric = route_metric, + .mss = mss, + }; + + nm_ip6_config_add_route(config, &r, NULL); + } + + nm_ip6_config_add_dependent_routes(config, route_table, route_metric, _is_device_vrf(self)); + + if (priv->ip6_config) { + nm_ip6_config_replace(priv->ip6_config, config, NULL); + g_object_unref(config); + } else { + priv->ip6_config = config; + nm_dbus_object_export(NM_DBUS_OBJECT(config)); + g_object_notify((GObject *) self, NM_ACTIVE_CONNECTION_IP6_CONFIG); + } + + nm_vpn_connection_config_maybe_complete(self, TRUE); +} + +static gboolean +connect_timeout_cb(gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + priv->connect_timeout = 0; + + /* Cancel activation if it's taken too long */ + if (priv->vpn_state == STATE_CONNECT || priv->vpn_state == STATE_IP_CONFIG_GET) { + _LOGW("VPN connection: connect timeout exceeded."); + _set_vpn_state(self, + STATE_FAILED, + NM_ACTIVE_CONNECTION_STATE_REASON_CONNECT_TIMEOUT, + FALSE); + } + + return FALSE; +} + +static void +connect_success(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMSettingVpn * s_vpn; + guint32 timeout; + + s_vpn = nm_connection_get_setting_vpn(_get_applied_connection(self)); + g_assert(s_vpn); + + /* Timeout waiting for IP config signal from VPN service + * It is a configured value or 60 seconds */ + timeout = nm_setting_vpn_get_timeout(s_vpn); + if (timeout == 0) { + timeout = nm_config_data_get_connection_default_int64(NM_CONFIG_GET_DATA, + NM_CON_DEFAULT("vpn.timeout"), + NULL, + 1, + G_MAXUINT32, + 60); + } + priv->connect_timeout = g_timeout_add_seconds(timeout, connect_timeout_cb, self); + + nm_clear_pointer(&priv->connect_hash, g_variant_unref); +} + +static void +connect_cb(GDBusProxy *proxy, GAsyncResult *result, gpointer user_data) +{ + NMVpnConnection *self; + gs_unref_variant GVariant *reply = NULL; + gs_free_error GError *error = NULL; + + reply = g_dbus_proxy_call_finish(proxy, result, &error); + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + self = NM_VPN_CONNECTION(user_data); + + if (error) { + g_dbus_error_strip_remote_error(error); + _LOGW("VPN connection: failed to connect: '%s'", error->message); + _set_vpn_state(self, + STATE_FAILED, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_START_FAILED, + FALSE); + } else + connect_success(self); +} + +static void +connect_interactive_cb(GDBusProxy *proxy, GAsyncResult *result, gpointer user_data) +{ + NMVpnConnection * self; + NMVpnConnectionPrivate *priv; + gs_unref_variant GVariant *reply = NULL; + gs_free_error GError *error = NULL; + + reply = g_dbus_proxy_call_finish(proxy, result, &error); + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + self = NM_VPN_CONNECTION(user_data); + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + _LOGI("VPN connection: (ConnectInteractive) reply received"); + + if (g_error_matches(error, + NM_VPN_PLUGIN_ERROR, + NM_VPN_PLUGIN_ERROR_INTERACTIVE_NOT_SUPPORTED)) { + _LOGD("VPN connection: falling back to non-interactive connect"); + + /* Fall back to Connect() */ + g_dbus_proxy_call(priv->proxy, + "Connect", + g_variant_new("(@a{sa{sv}})", priv->connect_hash), + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) connect_cb, + self); + } else if (error) { + g_dbus_error_strip_remote_error(error); + _LOGW("VPN connection: failed to connect interactively: '%s'", error->message); + _set_vpn_state(self, + STATE_FAILED, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_START_FAILED, + FALSE); + } else + connect_success(self); +} + +/* Add a username to a hashed connection */ +static GVariant * +_hash_with_username(NMConnection *connection, const char *username) +{ + gs_unref_object NMConnection *dup = NULL; + NMSettingVpn * s_vpn; + + /* Shortcut if we weren't given a username or if there already was one in + * the VPN setting; don't bother duplicating the connection and everything. + */ + s_vpn = nm_connection_get_setting_vpn(connection); + g_assert(s_vpn); + if (username == NULL || nm_setting_vpn_get_user_name(s_vpn)) + return nm_connection_to_dbus(connection, NM_CONNECTION_SERIALIZE_ALL); + + dup = nm_simple_connection_new_clone(connection); + g_assert(dup); + s_vpn = nm_connection_get_setting_vpn(dup); + g_assert(s_vpn); + g_object_set(s_vpn, NM_SETTING_VPN_USER_NAME, username, NULL); + return nm_connection_to_dbus(dup, NM_CONNECTION_SERIALIZE_ALL); +} + +static void +really_activate(NMVpnConnection *self, const char *username) +{ + NMVpnConnectionPrivate *priv; + GVariantBuilder details; + + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + g_return_if_fail(priv->vpn_state == STATE_NEED_AUTH); + + nm_clear_pointer(&priv->connect_hash, g_variant_unref); + priv->connect_hash = _hash_with_username(_get_applied_connection(self), username); + g_variant_ref_sink(priv->connect_hash); + + /* If at least one agent doesn't support VPN hints, then we can't use + * ConnectInteractive(), because that agent won't be able to pass hints + * from the VPN plugin's interactive secrets requests to the VPN authentication + * dialog and we won't get the secrets we need. In this case fall back to + * the old Connect() call. + */ + if (nm_agent_manager_all_agents_have_capability( + nm_agent_manager_get(), + nm_active_connection_get_subject(NM_ACTIVE_CONNECTION(self)), + NM_SECRET_AGENT_CAPABILITY_VPN_HINTS)) { + _LOGD("Allowing interactive secrets as all agents have that capability"); + + g_variant_builder_init(&details, G_VARIANT_TYPE_VARDICT); + g_dbus_proxy_call(priv->proxy, + "ConnectInteractive", + g_variant_new("(@a{sa{sv}}a{sv})", priv->connect_hash, &details), + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) connect_interactive_cb, + self); + } else { + _LOGD("Calling old Connect function as not all agents support interactive secrets"); + g_dbus_proxy_call(priv->proxy, + "Connect", + g_variant_new("(@a{sa{sv}})", priv->connect_hash), + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) connect_cb, + self); + } + + _set_vpn_state(self, STATE_CONNECT, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); +} + +static void +failure_cb(GDBusProxy *proxy, guint32 reason, gpointer user_data) +{ + NMVpnConnection *self = NM_VPN_CONNECTION(user_data); + + plugin_failed(self, reason); +} + +static void +state_changed_cb(GDBusProxy *proxy, guint32 new_service_state, gpointer user_data) +{ + NMVpnConnection *self = NM_VPN_CONNECTION(user_data); + + plugin_state_changed(self, new_service_state); +} + +static void +secrets_required_cb(GDBusProxy * proxy, + const char * message, + const char *const *secrets, + gpointer user_data) +{ + NMVpnConnection *self = NM_VPN_CONNECTION(user_data); + + plugin_interactive_secrets_required(self, message, secrets); +} + +static void +config_cb(GDBusProxy *proxy, GVariant *dict, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + /* Only list to this signals during and after connection */ + if (priv->vpn_state >= STATE_NEED_AUTH) + nm_vpn_connection_config_get(self, dict); +} + +static void +ip4_config_cb(GDBusProxy *proxy, GVariant *dict, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + /* Only list to this signals during and after connection */ + if (priv->vpn_state >= STATE_NEED_AUTH) + nm_vpn_connection_ip4_config_get(self, dict); +} + +static void +ip6_config_cb(GDBusProxy *proxy, GVariant *dict, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + /* Only list to this signals during and after connection */ + if (priv->vpn_state >= STATE_NEED_AUTH) + nm_vpn_connection_ip6_config_get(self, dict); +} + +static void +_name_owner_changed(GObject *object, GParamSpec *pspec, gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + char * owner; + + owner = g_dbus_proxy_get_name_owner(G_DBUS_PROXY(object)); + + if (owner && !priv->service_running) { + /* service appeared */ + priv->service_running = TRUE; + _LOGI("Saw the service appear; activating connection"); + + /* No need to wait for the timeout any longer */ + nm_clear_g_source(&priv->start_timeout); + + /* Expect success because the VPN service has already appeared */ + _nm_dbus_signal_connect(priv->proxy, + "Failure", + G_VARIANT_TYPE("(u)"), + G_CALLBACK(failure_cb), + self); + _nm_dbus_signal_connect(priv->proxy, + "StateChanged", + G_VARIANT_TYPE("(u)"), + G_CALLBACK(state_changed_cb), + self); + _nm_dbus_signal_connect(priv->proxy, + "SecretsRequired", + G_VARIANT_TYPE("(sas)"), + G_CALLBACK(secrets_required_cb), + self); + _nm_dbus_signal_connect(priv->proxy, + "Config", + G_VARIANT_TYPE("(a{sv})"), + G_CALLBACK(config_cb), + self); + _nm_dbus_signal_connect(priv->proxy, + "Ip4Config", + G_VARIANT_TYPE("(a{sv})"), + G_CALLBACK(ip4_config_cb), + self); + _nm_dbus_signal_connect(priv->proxy, + "Ip6Config", + G_VARIANT_TYPE("(a{sv})"), + G_CALLBACK(ip6_config_cb), + self); + + _set_vpn_state(self, STATE_NEED_AUTH, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + + /* Kick off the secrets requests; first we get existing system secrets + * and ask the plugin if these are sufficient, next we get all existing + * secrets from system and from user agents and ask the plugin again, + * and last we ask the user for new secrets if required. + */ + get_secrets(self, SECRETS_REQ_SYSTEM, NULL); + } else if (!owner && priv->service_running) { + /* service went away */ + priv->service_running = FALSE; + _LOGI("VPN service disappeared"); + nm_vpn_connection_disconnect(self, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_STOPPED, + FALSE); + } + + g_free(owner); +} + +static gboolean +_daemon_exec_timeout(gpointer data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(data); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + _LOGW("Timed out waiting for the service to start"); + priv->start_timeout = 0; + nm_vpn_connection_disconnect(self, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_START_TIMEOUT, + FALSE); + return G_SOURCE_REMOVE; +} + +static int +_get_log_level(void) +{ + NMLogLevel level; + + /* curiously enough, nm-logging also uses syslog. But it + * maps NMLogLevel differently to the syslog levels then we + * do here. + * + * The reason is, that LOG_NOTICE is already something worth + * highlighting in the journal, but we have 3 levels that are + * lower then LOG_NOTICE (LOGL_TRACE, LOGL_DEBUG, LOGL_INFO), + * On the other hand, syslog only defines LOG_DEBUG and LOG_INFO. + * Thus, we must map them differently. + * + * Inside the VPN plugin, you might want to treat LOG_NOTICE as + * as low severity, not worthy to be highlighted (like NM does). */ + + level = nm_logging_get_level(LOGD_VPN_PLUGIN); + if (level != _LOGL_OFF) { + if (level <= LOGL_TRACE) + return LOG_DEBUG; + if (level <= LOGL_DEBUG) + return LOG_INFO; + if (level <= LOGL_INFO) + return LOG_NOTICE; + if (level <= LOGL_WARN) + return LOG_WARNING; + if (level <= LOGL_ERR) + return LOG_ERR; + } + + return LOG_EMERG; +} + +static gboolean +nm_vpn_service_daemon_exec(NMVpnConnection *self, GError **error) +{ + NMVpnConnectionPrivate *priv; + GPid pid; + char * vpn_argv[4]; + gboolean success = FALSE; + GError * spawn_error = NULL; + guint i, j, n_environ; + gs_free char ** envp = NULL; + char env_log_level[NM_STRLEN("NM_VPN_LOG_LEVEL=") + 100]; + char env_log_syslog[NM_STRLEN("NM_VPN_LOG_SYSLOG=") + 10]; + const int N_ENVIRON_EXTRA = 3; + char ** p_environ; + + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), FALSE); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + i = 0; + vpn_argv[i++] = (char *) nm_vpn_plugin_info_get_program(priv->plugin_info); + g_return_val_if_fail(vpn_argv[0], FALSE); + if (nm_vpn_plugin_info_supports_multiple(priv->plugin_info)) { + vpn_argv[i++] = "--bus-name"; + vpn_argv[i++] = priv->bus_name; + } + vpn_argv[i++] = NULL; + + /* we include <unistd.h> and "config.h" defines _GNU_SOURCE for us. So, we have @environ. */ + p_environ = environ; + n_environ = p_environ ? g_strv_length(p_environ) : 0; + envp = g_new(char *, n_environ + N_ENVIRON_EXTRA); + for (i = 0, j = 0; j < n_environ; j++) { + if (g_str_has_prefix(p_environ[j], "NM_VPN_LOG_LEVEL=") + || g_str_has_prefix(p_environ[j], "NM_VPN_LOG_SYSLOG=")) + continue; + envp[i++] = p_environ[j]; + } + + /* NM_VPN_LOG_LEVEL: the syslog logging level for the plugin. */ + envp[i++] = nm_sprintf_buf(env_log_level, "NM_VPN_LOG_LEVEL=%d", _get_log_level()); + + /* NM_VPN_LOG_SYSLOG: whether to log to stdout or syslog. If NetworkManager itself runs in + * foreground, we also want the plugin to log to stdout. + * If the plugin runs in background, the plugin should prefer logging to syslog. Otherwise + * logging messages will be lost (unless using journald, in which case it wouldn't matter). */ + envp[i++] = nm_sprintf_buf(env_log_syslog, + "NM_VPN_LOG_SYSLOG=%c", + nm_logging_syslog_enabled() ? '1' : '0'); + + envp[i++] = NULL; + nm_assert(i <= n_environ + N_ENVIRON_EXTRA); + + success = g_spawn_async(NULL, vpn_argv, envp, 0, nm_utils_setpgid, NULL, &pid, &spawn_error); + + if (success) { + _LOGI("Started the VPN service, PID %ld", (long int) pid); + priv->start_timeout = g_timeout_add_seconds(5, _daemon_exec_timeout, self); + } else { + g_set_error(error, + NM_MANAGER_ERROR, + NM_MANAGER_ERROR_FAILED, + "%s", + spawn_error ? spawn_error->message : "unknown g_spawn_async() error"); + + if (spawn_error) + g_error_free(spawn_error); + } + + return success; +} + +static void +on_proxy_acquired(GObject *object, GAsyncResult *result, gpointer user_data) +{ + NMVpnConnection * self; + NMVpnConnectionPrivate *priv; + gs_free_error GError *error = NULL; + GDBusProxy * proxy; + + proxy = g_dbus_proxy_new_for_bus_finish(result, &error); + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + self = NM_VPN_CONNECTION(user_data); + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (error) { + _LOGE("failed to acquire dbus proxy for VPN service: %s", error->message); + _set_vpn_state(self, + STATE_FAILED, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_START_FAILED, + FALSE); + return; + } + + priv->proxy = proxy; + + g_signal_connect(priv->proxy, "notify::g-name-owner", G_CALLBACK(_name_owner_changed), self); + _name_owner_changed(G_OBJECT(priv->proxy), NULL, self); + + if (priv->service_running) + return; + + if (!nm_vpn_service_daemon_exec(self, &error)) { + _LOGW("Could not launch the VPN service. error: %s.", error->message); + + nm_vpn_connection_disconnect(self, + NM_ACTIVE_CONNECTION_STATE_REASON_SERVICE_START_FAILED, + FALSE); + } +} + +void +nm_vpn_connection_activate(NMVpnConnection *self, NMVpnPluginInfo *plugin_info) +{ + NMVpnConnectionPrivate *priv; + NMSettingVpn * s_vpn; + const char * service; + + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + g_return_if_fail(NM_IS_VPN_PLUGIN_INFO(plugin_info)); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + g_return_if_fail(!priv->plugin_info); + + s_vpn = nm_connection_get_setting_vpn(_get_applied_connection(self)); + g_return_if_fail(s_vpn); + + service = nm_vpn_plugin_info_get_service(plugin_info); + nm_assert(service); + + if (nm_vpn_plugin_info_supports_multiple(plugin_info)) { + const char *path; + + path = nm_dbus_object_get_path(NM_DBUS_OBJECT(self)); + if (path) + path = strrchr(path, '/'); + g_return_if_fail(path); + + priv->bus_name = g_strdup_printf("%s.Connection_%s", service, &path[1]); + } else + priv->bus_name = g_strdup(service); + + priv->connection_can_persist = nm_setting_vpn_get_persistent(s_vpn); + priv->plugin_info = g_object_ref(plugin_info); + priv->cancellable = g_cancellable_new(); + + g_dbus_proxy_new_for_bus(G_BUS_TYPE_SYSTEM, + G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES, + NULL, + priv->bus_name, + NM_VPN_DBUS_PLUGIN_PATH, + NM_VPN_DBUS_PLUGIN_INTERFACE, + priv->cancellable, + (GAsyncReadyCallback) on_proxy_acquired, + self); + + _set_vpn_state(self, STATE_PREPARE, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); +} + +NMVpnConnectionState +nm_vpn_connection_get_vpn_state(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NM_VPN_CONNECTION_STATE_UNKNOWN); + + return _state_to_nm_vpn_state(NM_VPN_CONNECTION_GET_PRIVATE(self)->vpn_state); +} + +const char * +nm_vpn_connection_get_banner(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NULL); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->banner; +} + +NMProxyConfig * +nm_vpn_connection_get_proxy_config(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NULL); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->proxy_config; +} + +NMIP4Config * +nm_vpn_connection_get_ip4_config(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NULL); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->ip4_config; +} + +NMIP6Config * +nm_vpn_connection_get_ip6_config(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NULL); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->ip6_config; +} + +static int +_get_ip_iface_for_device(NMVpnConnection *self, const char **out_iface) +{ + NMDevice * parent_dev; + int ifindex; + const char *iface; + + nm_assert(NM_IS_VPN_CONNECTION(self)); + + /* the ifindex and the ifname in this case should come together. + * They either must be both set, or none. */ + + parent_dev = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(self)); + if (!parent_dev) + goto none; + ifindex = nm_device_get_ip_ifindex(parent_dev); + if (ifindex <= 0) + goto none; + iface = nm_device_get_ip_iface(parent_dev); + if (!iface) + goto none; + + NM_SET_OUT(out_iface, iface); + return ifindex; +none: + NM_SET_OUT(out_iface, NULL); + return 0; +} + +const char * +nm_vpn_connection_get_ip_iface(NMVpnConnection *self, gboolean fallback_device) +{ + NMVpnConnectionPrivate *priv; + const char * iface; + + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), NULL); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->ip_iface || !fallback_device) + return priv->ip_iface; + + _get_ip_iface_for_device(self, &iface); + return iface; +} + +int +nm_vpn_connection_get_ip_ifindex(NMVpnConnection *self, gboolean fallback_device) +{ + NMVpnConnectionPrivate *priv; + + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), 0); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->ip_ifindex > 0) + return priv->ip_ifindex; + if (!fallback_device) + return 0; + + return _get_ip_iface_for_device(self, NULL); +} + +guint32 +nm_vpn_connection_get_ip4_internal_gateway(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), 0); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->ip4_internal_gw; +} + +struct in6_addr * +nm_vpn_connection_get_ip6_internal_gateway(NMVpnConnection *self) +{ + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), 0); + + return NM_VPN_CONNECTION_GET_PRIVATE(self)->ip6_internal_gw; +} + +void +nm_vpn_connection_disconnect(NMVpnConnection * self, + NMActiveConnectionStateReason reason, + gboolean quitting) +{ + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + + _set_vpn_state(self, STATE_DISCONNECTED, reason, quitting); +} + +gboolean +nm_vpn_connection_deactivate(NMVpnConnection * self, + NMActiveConnectionStateReason reason, + gboolean quitting) +{ + NMVpnConnectionPrivate *priv; + gboolean success = FALSE; + + g_return_val_if_fail(NM_IS_VPN_CONNECTION(self), FALSE); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + if (priv->vpn_state > STATE_UNKNOWN && priv->vpn_state <= STATE_DEACTIVATING) { + _set_vpn_state(self, STATE_DEACTIVATING, reason, quitting); + success = TRUE; + } + return success; +} + +/*****************************************************************************/ + +static void +plugin_need_secrets_cb(GDBusProxy *proxy, GAsyncResult *result, gpointer user_data) +{ + NMVpnConnection * self; + NMVpnConnectionPrivate *priv; + gs_unref_variant GVariant *reply = NULL; + gs_free_error GError *error = NULL; + const char * setting_name; + + reply = _nm_dbus_proxy_call_finish(proxy, result, G_VARIANT_TYPE("(s)"), &error); + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + self = NM_VPN_CONNECTION(user_data); + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (error) { + g_dbus_error_strip_remote_error(error); + _LOGE("plugin NeedSecrets request #%d failed: %s", priv->secrets_idx + 1, error->message); + _set_vpn_state(self, STATE_FAILED, NM_ACTIVE_CONNECTION_STATE_REASON_NO_SECRETS, FALSE); + return; + } + + g_variant_get(reply, "(&s)", &setting_name); + if (!strlen(setting_name)) { + _LOGD("service indicated no additional secrets required"); + + /* No secrets required; we can start the VPN */ + really_activate(self, priv->username); + return; + } + + /* More secrets required */ + if (priv->secrets_idx == SECRETS_REQ_NEW) { + _LOGE("final secrets request failed to provide sufficient secrets"); + _set_vpn_state(self, STATE_FAILED, NM_ACTIVE_CONNECTION_STATE_REASON_NO_SECRETS, FALSE); + } else { + _LOGD("service indicated additional secrets required"); + get_secrets(self, priv->secrets_idx + 1, NULL); + } +} + +static void +plugin_new_secrets_cb(GDBusProxy *proxy, GAsyncResult *result, gpointer user_data) +{ + NMVpnConnection *self; + gs_unref_variant GVariant *reply = NULL; + gs_free_error GError *error = NULL; + + reply = g_dbus_proxy_call_finish(proxy, result, &error); + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + self = NM_VPN_CONNECTION(user_data); + + if (error) { + g_dbus_error_strip_remote_error(error); + _LOGE("sending new secrets to the plugin failed: %s", error->message); + _set_vpn_state(self, STATE_FAILED, NM_ACTIVE_CONNECTION_STATE_REASON_NO_SECRETS, FALSE); + } else + _set_vpn_state(self, STATE_CONNECT, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); +} + +static void +get_secrets_cb(NMSettingsConnection * connection, + NMSettingsConnectionCallId *call_id, + const char * agent_username, + const char * setting_name, + GError * error, + gpointer user_data) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(user_data); + NMVpnConnectionPrivate *priv; + GVariant * dict; + + g_return_if_fail(NM_IS_VPN_CONNECTION(self)); + + priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + g_return_if_fail(connection && connection == _get_settings_connection(self, FALSE)); + g_return_if_fail(call_id == priv->secrets_id); + + priv->secrets_id = NULL; + + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + if (error && priv->secrets_idx >= SECRETS_REQ_NEW) { + _LOGE("Failed to request VPN secrets #%d: %s", priv->secrets_idx + 1, error->message); + _set_vpn_state(self, STATE_FAILED, NM_ACTIVE_CONNECTION_STATE_REASON_NO_SECRETS, FALSE); + return; + } + + /* Cache the username for later */ + if (agent_username) { + g_free(priv->username); + priv->username = g_strdup(agent_username); + } + + dict = _hash_with_username(_get_applied_connection(self), priv->username); + + if (priv->secrets_idx == SECRETS_REQ_INTERACTIVE) { + _LOGD("sending secrets to the plugin"); + + /* Send the secrets back to the plugin */ + g_dbus_proxy_call(priv->proxy, + "NewSecrets", + g_variant_new("(@a{sa{sv}})", dict), + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) plugin_new_secrets_cb, + self); + } else { + _LOGD("asking service if additional secrets are required"); + + /* Ask the VPN service if more secrets are required */ + g_dbus_proxy_call(priv->proxy, + "NeedSecrets", + g_variant_new("(@a{sa{sv}})", dict), + G_DBUS_CALL_FLAGS_NONE, + -1, + priv->cancellable, + (GAsyncReadyCallback) plugin_need_secrets_cb, + self); + } +} + +static void +get_secrets(NMVpnConnection *self, SecretsReq secrets_idx, const char *const *hints) +{ + NMVpnConnectionPrivate * priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + NMSecretAgentGetSecretsFlags flags = NM_SECRET_AGENT_GET_SECRETS_FLAG_NONE; + + g_return_if_fail(secrets_idx < SECRETS_REQ_LAST); + priv->secrets_idx = secrets_idx; + + cancel_get_secrets(self); + + _LOGD("requesting VPN secrets pass #%d", priv->secrets_idx + 1); + + switch (priv->secrets_idx) { + case SECRETS_REQ_SYSTEM: + flags = NM_SECRET_AGENT_GET_SECRETS_FLAG_ONLY_SYSTEM; + break; + case SECRETS_REQ_EXISTING: + flags = NM_SECRET_AGENT_GET_SECRETS_FLAG_NONE; + break; + case SECRETS_REQ_NEW: + case SECRETS_REQ_INTERACTIVE: + flags = NM_SECRET_AGENT_GET_SECRETS_FLAG_ALLOW_INTERACTION; + break; + default: + g_assert_not_reached(); + } + + if (nm_active_connection_get_user_requested(NM_ACTIVE_CONNECTION(self))) + flags |= NM_SECRET_AGENT_GET_SECRETS_FLAG_USER_REQUESTED; + + priv->secrets_id = nm_settings_connection_get_secrets( + _get_settings_connection(self, FALSE), + _get_applied_connection(self), + nm_active_connection_get_subject(NM_ACTIVE_CONNECTION(self)), + NM_SETTING_VPN_SETTING_NAME, + flags, + hints, + get_secrets_cb, + self); + g_return_if_fail(priv->secrets_id); +} + +static void +plugin_interactive_secrets_required(NMVpnConnection * self, + const char * message, + const char *const *secrets) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + const gsize secrets_len = NM_PTRARRAY_LEN(secrets); + gsize i; + gs_free const char ** hints = NULL; + gs_free char * message_hint = NULL; + + if (!NM_IN_SET(priv->vpn_state, STATE_CONNECT, STATE_NEED_AUTH)) { + _LOGD("VPN plugin: requested secrets; state %s (%d); ignore request in current state", + vpn_state_to_string_a(priv->vpn_state), + priv->vpn_state); + return; + } + + _LOGI("VPN plugin: requested secrets; state %s (%d)", + vpn_state_to_string_a(priv->vpn_state), + priv->vpn_state); + + priv->secrets_idx = SECRETS_REQ_INTERACTIVE; + _set_vpn_state(self, STATE_NEED_AUTH, NM_ACTIVE_CONNECTION_STATE_REASON_NONE, FALSE); + + /* Copy hints and add message to the end */ + hints = g_new(const char *, secrets_len + 2); + for (i = 0; i < secrets_len; i++) + hints[i] = secrets[i]; + if (message) { + message_hint = g_strdup_printf("x-vpn-message:%s", message); + hints[i++] = message_hint; + } + hints[i] = NULL; + nm_assert(i < secrets_len + 2); + + get_secrets(self, SECRETS_REQ_INTERACTIVE, hints); +} + +/*****************************************************************************/ + +static void +device_changed(NMActiveConnection *active, NMDevice *new_device, NMDevice *old_device) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(active); + + if (!_service_and_connection_can_persist(NM_VPN_CONNECTION(active))) + return; + if (priv->vpn_state < STATE_CONNECT || priv->vpn_state > STATE_ACTIVATED) + return; + + /* Route-based VPNs must update their routing and send a new IP config + * since all their routes need to be adjusted for new_device. + */ + if (priv->ip_ifindex <= 0) + return; + + /* Device changed underneath the VPN connection. Let the plugin figure + * out that connectivity is down and start its reconnect attempt if it + * needs to. + */ + if (old_device) + remove_parent_device_config(NM_VPN_CONNECTION(active), old_device); + + if (new_device) + apply_parent_device_config(NM_VPN_CONNECTION(active)); +} + +/*****************************************************************************/ + +static void +nm_vpn_connection_init(NMVpnConnection *self) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + priv->vpn_state = STATE_WAITING; + priv->secrets_idx = SECRETS_REQ_SYSTEM; + priv->netns = g_object_ref(nm_netns_get()); +} + +static void +dispose(GObject *object) +{ + NMVpnConnection * self = NM_VPN_CONNECTION(object); + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(self); + + if (priv->proxy) + g_signal_handlers_disconnect_by_data(priv->proxy, self); + + nm_clear_g_source(&priv->start_timeout); + + nm_clear_pointer(&priv->connect_hash, g_variant_unref); + + nm_clear_pointer(&priv->ip4_dev_route_blacklist, g_ptr_array_unref); + + nm_clear_g_source(&priv->connect_timeout); + + dispatcher_cleanup(self); + + cancel_get_secrets(self); + + nm_clear_g_cancellable(&priv->cancellable); + + g_clear_object(&priv->proxy_config); + nm_dbus_object_clear_and_unexport(&priv->ip4_config); + nm_dbus_object_clear_and_unexport(&priv->ip6_config); + g_clear_object(&priv->proxy); + g_clear_object(&priv->plugin_info); + + fw_call_cleanup(self); + + nm_pacrunner_manager_remove_clear(&priv->pacrunner_conf_id); + + G_OBJECT_CLASS(nm_vpn_connection_parent_class)->dispose(object); +} + +static void +finalize(GObject *object) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(object); + + g_free(priv->banner); + g_free(priv->ip_iface); + g_free(priv->username); + g_free(priv->ip6_internal_gw); + g_free(priv->ip6_external_gw); + + G_OBJECT_CLASS(nm_vpn_connection_parent_class)->finalize(object); + + g_clear_object(&priv->netns); +} + +static gboolean +ip_config_valid(VpnState state) +{ + return (state == STATE_PRE_UP || state == STATE_ACTIVATED); +} + +static void +get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +{ + NMVpnConnectionPrivate *priv = NM_VPN_CONNECTION_GET_PRIVATE(object); + NMDevice * parent_dev; + + switch (prop_id) { + case PROP_VPN_STATE: + g_value_set_uint(value, _state_to_nm_vpn_state(priv->vpn_state)); + break; + case PROP_BANNER: + g_value_set_string(value, priv->banner ?: ""); + break; + case PROP_IP4_CONFIG: + nm_dbus_utils_g_value_set_object_path(value, + ip_config_valid(priv->vpn_state) ? priv->ip4_config + : NULL); + break; + case PROP_IP6_CONFIG: + nm_dbus_utils_g_value_set_object_path(value, + ip_config_valid(priv->vpn_state) ? priv->ip6_config + : NULL); + break; + case PROP_MASTER: + parent_dev = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(object)); + nm_dbus_utils_g_value_set_object_path(value, parent_dev); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); + break; + } +} + +static const GDBusSignalInfo signal_info_vpn_state_changed = NM_DEFINE_GDBUS_SIGNAL_INFO_INIT( + "VpnStateChanged", + .args = NM_DEFINE_GDBUS_ARG_INFOS(NM_DEFINE_GDBUS_ARG_INFO("state", "u"), + NM_DEFINE_GDBUS_ARG_INFO("reason", "u"), ), ); + +static const NMDBusInterfaceInfoExtended interface_info_vpn_connection = { + .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT( + NM_DBUS_INTERFACE_VPN_CONNECTION, + .signals = NM_DEFINE_GDBUS_SIGNAL_INFOS(&nm_signal_info_property_changed_legacy, + &signal_info_vpn_state_changed, ), + .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS( + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VpnState", + "u", + NM_VPN_CONNECTION_VPN_STATE), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Banner", + "s", + NM_VPN_CONNECTION_BANNER), ), ), + .legacy_property_changed = TRUE, +}; + +static void +nm_vpn_connection_class_init(NMVpnConnectionClass *connection_class) +{ + GObjectClass * object_class = G_OBJECT_CLASS(connection_class); + NMActiveConnectionClass *active_class = NM_ACTIVE_CONNECTION_CLASS(connection_class); + NMDBusObjectClass * dbus_object_class = NM_DBUS_OBJECT_CLASS(connection_class); + + dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS(&interface_info_vpn_connection); + + object_class->get_property = get_property; + object_class->dispose = dispose; + object_class->finalize = finalize; + + active_class->device_state_changed = device_state_changed; + active_class->device_changed = device_changed; + + obj_properties[PROP_VPN_STATE] = g_param_spec_uint(NM_VPN_CONNECTION_VPN_STATE, + "", + "", + NM_VPN_CONNECTION_STATE_UNKNOWN, + NM_VPN_CONNECTION_STATE_DISCONNECTED, + NM_VPN_CONNECTION_STATE_UNKNOWN, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_BANNER] = g_param_spec_string(NM_VPN_CONNECTION_BANNER, + "", + "", + NULL, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties); + + g_object_class_override_property(object_class, PROP_MASTER, NM_ACTIVE_CONNECTION_MASTER); + g_object_class_override_property(object_class, + PROP_IP4_CONFIG, + NM_ACTIVE_CONNECTION_IP4_CONFIG); + g_object_class_override_property(object_class, + PROP_IP6_CONFIG, + NM_ACTIVE_CONNECTION_IP6_CONFIG); + + signals[INTERNAL_STATE_CHANGED] = g_signal_new(NM_VPN_CONNECTION_INTERNAL_STATE_CHANGED, + G_OBJECT_CLASS_TYPE(object_class), + G_SIGNAL_RUN_FIRST, + 0, + NULL, + NULL, + NULL, + G_TYPE_NONE, + 3, + G_TYPE_UINT, + G_TYPE_UINT, + G_TYPE_UINT); + + signals[INTERNAL_RETRY_AFTER_FAILURE] = + g_signal_new(NM_VPN_CONNECTION_INTERNAL_RETRY_AFTER_FAILURE, + G_OBJECT_CLASS_TYPE(object_class), + G_SIGNAL_RUN_FIRST, + 0, + NULL, + NULL, + NULL, + G_TYPE_NONE, + 0); +} |