/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* NetworkManager -- Network link manager * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Copyright (C) 2008 Novell, Inc. * Copyright (C) 2008 - 2012 Red Hat, Inc. */ #include "nm-default.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef aligned_u64 #define aligned_u64 unsigned long long __attribute__((aligned(8))) #endif #include #include #include "NetworkManagerUtils.h" #include "nm-ppp-manager.h" #include "nm-platform.h" #include "nm-core-internal.h" #include "nmdbus-ppp-manager.h" #define _NMLOG_DOMAIN LOGD_PPP #define _NMLOG_PREFIX_NAME "ppp-manager" #define _NMLOG(level, ...) \ G_STMT_START { \ nm_log ((level), _NMLOG_DOMAIN, \ "%s" _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \ _NMLOG_PREFIX_NAME": " \ _NM_UTILS_MACRO_REST(__VA_ARGS__)); \ } G_STMT_END static void _ppp_cleanup (NMPPPManager *manager); static void _ppp_kill (NMPPPManager *manager); #define NM_PPPD_PLUGIN PPPD_PLUGIN_DIR "/nm-pppd-plugin.so" #define PPP_MANAGER_SECRET_TRIES "ppp-manager-secret-tries" typedef struct { GPid pid; char *parent_iface; NMActRequest *act_req; GDBusMethodInvocation *pending_secrets_context; NMActRequestGetSecretsCallId secrets_id; const char *secrets_setting_name; guint ppp_watch_id; guint ppp_timeout_handler; /* Monitoring */ char *ip_iface; int monitor_fd; guint monitor_id; } NMPPPManagerPrivate; #define NM_PPP_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_PPP_MANAGER, NMPPPManagerPrivate)) G_DEFINE_TYPE (NMPPPManager, nm_ppp_manager, NM_TYPE_EXPORTED_OBJECT) enum { STATE_CHANGED, IP4_CONFIG, IP6_CONFIG, STATS, LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0 }; enum { PROP_0, PROP_PARENT_IFACE, LAST_PROP }; static void nm_ppp_manager_init (NMPPPManager *manager) { NM_PPP_MANAGER_GET_PRIVATE (manager)->monitor_fd = -1; } static void dispose (GObject *object) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (object); _ppp_cleanup (NM_PPP_MANAGER (object)); _ppp_kill (NM_PPP_MANAGER (object)); g_clear_object (&priv->act_req); G_OBJECT_CLASS (nm_ppp_manager_parent_class)->dispose (object); } static void finalize (GObject *object) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (object); g_free (priv->ip_iface); g_free (priv->parent_iface); G_OBJECT_CLASS (nm_ppp_manager_parent_class)->finalize (object); } static void set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (object); switch (prop_id) { case PROP_PARENT_IFACE: g_free (priv->parent_iface); priv->parent_iface = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (object); switch (prop_id) { case PROP_PARENT_IFACE: g_value_set_string (value, priv->parent_iface); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } NMPPPManager * nm_ppp_manager_new (const char *iface) { g_return_val_if_fail (iface != NULL, NULL); return (NMPPPManager *) g_object_new (NM_TYPE_PPP_MANAGER, NM_PPP_MANAGER_PARENT_IFACE, iface, NULL); } /*******************************************/ static gboolean monitor_cb (gpointer user_data) { NMPPPManager *manager = NM_PPP_MANAGER (user_data); NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); struct ifreq req; struct ppp_stats stats; memset (&req, 0, sizeof (req)); memset (&stats, 0, sizeof (stats)); req.ifr_data = (caddr_t) &stats; strncpy (req.ifr_name, priv->ip_iface, sizeof (req.ifr_name)); if (ioctl (priv->monitor_fd, SIOCGPPPSTATS, &req) < 0) { if (errno != ENODEV) _LOGW ("could not read ppp stats: %s", strerror (errno)); } else { g_signal_emit (manager, signals[STATS], 0, stats.p.ppp_ibytes, stats.p.ppp_obytes); } return TRUE; } static void monitor_stats (NMPPPManager *manager) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); /* already monitoring */ if (priv->monitor_fd >= 0) return; priv->monitor_fd = socket (AF_INET, SOCK_DGRAM, 0); if (priv->monitor_fd >= 0) { g_warn_if_fail (priv->monitor_id == 0); if (priv->monitor_id) g_source_remove (priv->monitor_id); priv->monitor_id = g_timeout_add_seconds (5, monitor_cb, manager); } else _LOGW ("could not monitor PPP stats: %s", strerror (errno)); } /*******************************************/ static void remove_timeout_handler (NMPPPManager *manager) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); nm_clear_g_source (&priv->ppp_timeout_handler); } static void cancel_get_secrets (NMPPPManager *self) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (self); if (priv->secrets_id) nm_act_request_cancel_secrets (priv->act_req, priv->secrets_id); g_return_if_fail (!priv->secrets_id && !priv->secrets_setting_name); } static gboolean extract_details_from_connection (NMConnection *connection, const char *secrets_setting_name, const char **username, const char **password, GError **error) { NMSettingConnection *s_con; NMSetting *setting; const char *setting_name; g_return_val_if_fail (connection != NULL, FALSE); g_return_val_if_fail (username != NULL, FALSE); g_return_val_if_fail (password != NULL, FALSE); if (secrets_setting_name) setting_name = secrets_setting_name; else { /* Get the setting matching the connection type */ s_con = nm_connection_get_setting_connection (connection); g_assert (s_con); setting_name = nm_setting_connection_get_connection_type (s_con); g_assert (setting_name); /* In case of bluetooth connection, use GSM or CDMA setting */ if (strcmp (setting_name, NM_SETTING_BLUETOOTH_SETTING_NAME) == 0) { if (nm_connection_get_setting_gsm (connection)) setting_name = NM_SETTING_GSM_SETTING_NAME; else setting_name = NM_SETTING_CDMA_SETTING_NAME; } } setting = nm_connection_get_setting_by_name (connection, setting_name); if (!setting) { /* This shouldn't ever happen */ g_set_error_literal (error, NM_MANAGER_ERROR, NM_MANAGER_ERROR_FAILED, "Missing type-specific setting; no secrets could be found."); return FALSE; } if (NM_IS_SETTING_PPPOE (setting)) { *username = nm_setting_pppoe_get_username (NM_SETTING_PPPOE (setting)); *password = nm_setting_pppoe_get_password (NM_SETTING_PPPOE (setting)); } else if (NM_IS_SETTING_ADSL (setting)) { *username = nm_setting_adsl_get_username (NM_SETTING_ADSL (setting)); *password = nm_setting_adsl_get_password (NM_SETTING_ADSL (setting)); } else if (NM_IS_SETTING_GSM (setting)) { *username = nm_setting_gsm_get_username (NM_SETTING_GSM (setting)); *password = nm_setting_gsm_get_password (NM_SETTING_GSM (setting)); } else if (NM_IS_SETTING_CDMA (setting)) { *username = nm_setting_cdma_get_username (NM_SETTING_CDMA (setting)); *password = nm_setting_cdma_get_password (NM_SETTING_CDMA (setting)); } return TRUE; } static void ppp_secrets_cb (NMActRequest *req, NMActRequestGetSecretsCallId call_id, NMSettingsConnection *settings_connection, /* unused (we pass NULL here) */ GError *error, gpointer user_data) { NMPPPManager *self = NM_PPP_MANAGER (user_data); NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (self); const char *username = NULL; const char *password = NULL; GError *local = NULL; NMConnection *applied_connection; g_return_if_fail (priv->pending_secrets_context != NULL); g_return_if_fail (req == priv->act_req); g_return_if_fail (call_id == priv->secrets_id); if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) goto out; if (error) { _LOGW ("%s", error->message); g_dbus_method_invocation_return_gerror (priv->pending_secrets_context, error); goto out; } applied_connection = nm_act_request_get_applied_connection (req); if (!extract_details_from_connection (applied_connection, priv->secrets_setting_name, &username, &password, &local)) { _LOGW ("%s", local->message); g_dbus_method_invocation_take_error (priv->pending_secrets_context, local); goto out; } /* This is sort of a hack but... * pppd plugin only ever needs username and password. Passing the full * connection there would mean some bloat: the plugin would need to link * against libnm just to parse this. So instead, let's just send what * it needs. */ g_dbus_method_invocation_return_value ( priv->pending_secrets_context, g_variant_new ("(ss)", username ? username : "", password ? password : "")); out: priv->pending_secrets_context = NULL; priv->secrets_id = NULL; priv->secrets_setting_name = NULL; } static void impl_ppp_manager_need_secrets (NMPPPManager *manager, GDBusMethodInvocation *context) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); NMConnection *applied_connection; const char *username = NULL; const char *password = NULL; guint32 tries; GPtrArray *hints = NULL; GError *error = NULL; NMSecretAgentGetSecretsFlags flags = NM_SECRET_AGENT_GET_SECRETS_FLAG_ALLOW_INTERACTION; nm_active_connection_clear_secrets (NM_ACTIVE_CONNECTION (priv->act_req)); applied_connection = nm_act_request_get_applied_connection (priv->act_req); priv->secrets_setting_name = nm_connection_need_secrets (applied_connection, &hints); if (!priv->secrets_setting_name) { /* Use existing secrets from the connection */ if (extract_details_from_connection (applied_connection, NULL, &username, &password, &error)) { /* Send existing secrets to the PPP plugin */ priv->pending_secrets_context = context; ppp_secrets_cb (priv->act_req, priv->secrets_id, NULL, NULL, manager); } else { _LOGW ("%s", error->message); g_dbus_method_invocation_take_error (priv->pending_secrets_context, error); } return; } /* Only ask for completely new secrets after retrying them once; some devices * appear to ask a few times when they actually don't even care what you * pass back. */ tries = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (applied_connection), PPP_MANAGER_SECRET_TRIES)); if (tries > 1) flags |= NM_SECRET_AGENT_GET_SECRETS_FLAG_REQUEST_NEW; priv->secrets_id = nm_act_request_get_secrets (priv->act_req, priv->secrets_setting_name, flags, hints ? g_ptr_array_index (hints, 0) : NULL, ppp_secrets_cb, manager); g_object_set_data (G_OBJECT (applied_connection), PPP_MANAGER_SECRET_TRIES, GUINT_TO_POINTER (++tries)); priv->pending_secrets_context = context; if (hints) g_ptr_array_free (hints, TRUE); } static void impl_ppp_manager_set_state (NMPPPManager *manager, GDBusMethodInvocation *context, guint32 state) { g_signal_emit (manager, signals[STATE_CHANGED], 0, state); g_dbus_method_invocation_return_value (context, NULL); } static gboolean set_ip_config_common (NMPPPManager *self, GVariant *config_dict, const char *iface_prop, guint32 *out_mtu) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (self); NMConnection *applied_connection; NMSettingPpp *s_ppp; const char *iface; if (!g_variant_lookup (config_dict, iface_prop, "&s", &iface)) { _LOGE ("no interface received!"); return FALSE; } if (priv->ip_iface == NULL) priv->ip_iface = g_strdup (iface); /* Got successful IP config; obviously the secrets worked */ applied_connection = nm_act_request_get_applied_connection (priv->act_req); g_object_set_data (G_OBJECT (applied_connection), PPP_MANAGER_SECRET_TRIES, NULL); if (out_mtu) { /* Get any custom MTU */ s_ppp = nm_connection_get_setting_ppp (applied_connection); *out_mtu = s_ppp ? nm_setting_ppp_get_mtu (s_ppp) : 0; } monitor_stats (self); return TRUE; } static void impl_ppp_manager_set_ip4_config (NMPPPManager *manager, GDBusMethodInvocation *context, GVariant *config_dict) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); NMIP4Config *config; NMPlatformIP4Address address; guint32 u32; GVariantIter *iter; _LOGI ("(IPv4 Config Get) reply received."); remove_timeout_handler (manager); config = nm_ip4_config_new (nm_platform_link_get_ifindex (NM_PLATFORM_GET, priv->ip_iface)); memset (&address, 0, sizeof (address)); address.plen = 32; if (g_variant_lookup (config_dict, NM_PPP_IP4_CONFIG_ADDRESS, "u", &u32)) address.address = u32; if (g_variant_lookup (config_dict, NM_PPP_IP4_CONFIG_GATEWAY, "u", &u32)) { nm_ip4_config_set_gateway (config, u32); address.peer_address = u32; } else address.peer_address = address.address; if (g_variant_lookup (config_dict, NM_PPP_IP4_CONFIG_PREFIX, "u", &u32)) address.plen = u32; if (address.address && address.plen && address.plen <= 32) { address.source = NM_IP_CONFIG_SOURCE_PPP; nm_ip4_config_add_address (config, &address); } else { _LOGE ("invalid IPv4 address received!"); goto out; } if (g_variant_lookup (config_dict, NM_PPP_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 (config_dict, NM_PPP_IP4_CONFIG_WINS, "au", &iter)) { while (g_variant_iter_next (iter, "u", &u32)) nm_ip4_config_add_wins (config, u32); g_variant_iter_free (iter); } if (!set_ip_config_common (manager, config_dict, NM_PPP_IP4_CONFIG_INTERFACE, &u32)) goto out; if (u32) nm_ip4_config_set_mtu (config, u32, NM_IP_CONFIG_SOURCE_PPP); /* Push the IP4 config up to the device */ g_signal_emit (manager, signals[IP4_CONFIG], 0, priv->ip_iface, config); out: g_object_unref (config); g_dbus_method_invocation_return_value (context, NULL); } /* Converts the named Interface Identifier item to an IPv6 LL address and * returns the IID. */ static gboolean iid_value_to_ll6_addr (GVariant *dict, const char *prop, struct in6_addr *out_addr, NMUtilsIPv6IfaceId *out_iid) { guint64 iid; if (!g_variant_lookup (dict, prop, "t", &iid)) { _LOGD ("pppd plugin property '%s' missing or not a uint64", prop); return FALSE; } g_return_val_if_fail (iid != 0, FALSE); /* Construct an IPv6 LL address from the interface identifier. See * http://tools.ietf.org/html/rfc4291#section-2.5.1 (IPv6) and * http://tools.ietf.org/html/rfc5072#section-4.1 (IPv6 over PPP). */ memset (out_addr->s6_addr, 0, sizeof (out_addr->s6_addr)); out_addr->s6_addr16[0] = htons (0xfe80); memcpy (out_addr->s6_addr + 8, &iid, sizeof (iid)); if (out_iid) nm_utils_ipv6_interface_identfier_get_from_addr (out_iid, out_addr); return TRUE; } static void impl_ppp_manager_set_ip6_config (NMPPPManager *manager, GDBusMethodInvocation *context, GVariant *config_dict) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); NMIP6Config *config; NMPlatformIP6Address addr; struct in6_addr a; NMUtilsIPv6IfaceId iid = NM_UTILS_IPV6_IFACE_ID_INIT; gboolean has_peer = FALSE; _LOGI ("(IPv6 Config Get) reply received."); remove_timeout_handler (manager); config = nm_ip6_config_new (nm_platform_link_get_ifindex (NM_PLATFORM_GET, priv->ip_iface)); memset (&addr, 0, sizeof (addr)); addr.plen = 64; if (iid_value_to_ll6_addr (config_dict, NM_PPP_IP6_CONFIG_PEER_IID, &a, NULL)) { nm_ip6_config_set_gateway (config, &a); addr.peer_address = a; has_peer = TRUE; } if (iid_value_to_ll6_addr (config_dict, NM_PPP_IP6_CONFIG_OUR_IID, &addr.address, &iid)) { if (!has_peer) addr.peer_address = addr.address; nm_ip6_config_add_address (config, &addr); if (set_ip_config_common (manager, config_dict, NM_PPP_IP6_CONFIG_INTERFACE, NULL)) { /* Push the IPv6 config and interface identifier up to the device */ g_signal_emit (manager, signals[IP6_CONFIG], 0, priv->ip_iface, &iid, config); } } else _LOGE ("invalid IPv6 address received!"); g_object_unref (config); g_dbus_method_invocation_return_value (context, NULL); } static void nm_ppp_manager_class_init (NMPPPManagerClass *manager_class) { GObjectClass *object_class = G_OBJECT_CLASS (manager_class); NMExportedObjectClass *exported_object_class = NM_EXPORTED_OBJECT_CLASS (manager_class); g_type_class_add_private (manager_class, sizeof (NMPPPManagerPrivate)); exported_object_class->export_path = NM_DBUS_PATH "/PPP"; exported_object_class->export_on_construction = TRUE; object_class->dispose = dispose; object_class->finalize = finalize; object_class->get_property = get_property; object_class->set_property = set_property; /* Properties */ g_object_class_install_property (object_class, PROP_PARENT_IFACE, g_param_spec_string (NM_PPP_MANAGER_PARENT_IFACE, "", "", NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); /* signals */ signals[STATE_CHANGED] = g_signal_new (NM_PPP_MANAGER_STATE_CHANGED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMPPPManagerClass, state_changed), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_UINT); signals[IP4_CONFIG] = g_signal_new ("ip4-config", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMPPPManagerClass, ip4_config), NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_OBJECT); signals[IP6_CONFIG] = g_signal_new ("ip6-config", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMPPPManagerClass, ip6_config), NULL, NULL, NULL, G_TYPE_NONE, 3, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_OBJECT); signals[STATS] = g_signal_new ("stats", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMPPPManagerClass, stats), NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_UINT); nm_exported_object_class_add_interface (NM_EXPORTED_OBJECT_CLASS (manager_class), NMDBUS_TYPE_PPP_MANAGER_SKELETON, "NeedSecrets", impl_ppp_manager_need_secrets, "SetIp4Config", impl_ppp_manager_set_ip4_config, "SetIp6Config", impl_ppp_manager_set_ip6_config, "SetState", impl_ppp_manager_set_state, NULL); } /*******************************************/ typedef struct { GPtrArray *array; GStringChunk *chunk; } NMCmdLine; static NMCmdLine * nm_cmd_line_new (void) { NMCmdLine *cmd; cmd = g_slice_new (NMCmdLine); cmd->array = g_ptr_array_new (); cmd->chunk = g_string_chunk_new (1024); return cmd; } static void nm_cmd_line_destroy (NMCmdLine *cmd) { g_ptr_array_free (cmd->array, TRUE); g_string_chunk_free (cmd->chunk); g_slice_free (NMCmdLine, cmd); } static char * nm_cmd_line_to_str (NMCmdLine *cmd) { char *str; g_ptr_array_add (cmd->array, NULL); str = g_strjoinv (" ", (gchar **) cmd->array->pdata); g_ptr_array_remove_index (cmd->array, cmd->array->len - 1); return str; } static void nm_cmd_line_add_string (NMCmdLine *cmd, const char *str) { g_ptr_array_add (cmd->array, g_string_chunk_insert (cmd->chunk, str)); } static void nm_cmd_line_add_int (NMCmdLine *cmd, int i) { char *str; str = g_strdup_printf ("%d", i); nm_cmd_line_add_string (cmd, str); g_free (str); } /*******************************************/ static void ppp_exit_code (guint pppd_exit_status, GPid pid) { const char *msg; switch (pppd_exit_status) { case 1: msg = "Fatal pppd error"; break; case 2: msg = "pppd options error"; break; case 3: msg = "No root priv error"; break; case 4: msg = "No ppp module error"; break; case 5: msg = "pppd received a signal"; break; case 6: msg = "Serial port lock failed"; break; case 7: msg = "Serial port open failed"; break; case 8: msg = "Connect script failed"; break; case 9: msg = "Pty program error"; break; case 10: msg = "PPP negotiation failed"; break; case 11: msg = "Peer didn't authenticatie itself"; break; case 12: msg = "Link idle: Idle Seconds reached."; break; case 13: msg = "Connect time limit reached."; break; case 14: msg = "Callback negotiated, call should come back."; break; case 15: msg = "Lack of LCP echo responses"; break; case 16: msg = "A modem hung up the phone"; break; case 17: msg = "Loopback detected"; break; case 18: msg = "The init script failed"; break; case 19: msg = "Authentication error.\n" "We failed to authenticate ourselves to the peer.\n" "Maybe bad account or password?"; break; default: msg = "Unknown error"; } _LOGW ("pppd pid %d exited with error: %s", pid, msg); } static void ppp_watch_cb (GPid pid, gint status, gpointer user_data) { NMPPPManager *manager = NM_PPP_MANAGER (user_data); NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); guint err; g_assert (pid == priv->pid); if (WIFEXITED (status)) { err = WEXITSTATUS (status); if (err != 0) ppp_exit_code (err, priv->pid); } else if (WIFSTOPPED (status)) { _LOGI ("pppd pid %d stopped unexpectedly with signal %d", priv->pid, WSTOPSIG (status)); } else if (WIFSIGNALED (status)) { _LOGI ("pppd pid %d died with signal %d", priv->pid, WTERMSIG (status)); } else _LOGI ("pppd pid %d died from an unknown cause", priv->pid); _LOGD ("pppd pid %d cleaned up", priv->pid); priv->pid = 0; priv->ppp_watch_id = 0; g_signal_emit (manager, signals[STATE_CHANGED], 0, NM_PPP_STATUS_DEAD); } static gboolean pppd_timed_out (gpointer data) { NMPPPManager *manager = NM_PPP_MANAGER (data); _LOGW ("pppd timed out or didn't initialize our dbus module"); _ppp_cleanup (manager); _ppp_kill (manager); g_signal_emit (manager, signals[STATE_CHANGED], 0, NM_PPP_STATUS_DEAD); return FALSE; } static NMCmdLine * create_pppd_cmd_line (NMPPPManager *self, NMSettingPpp *setting, NMSettingPppoe *pppoe, NMSettingAdsl *adsl, const char *ppp_name, GError **err) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (self); const char *pppd_binary = NULL; NMCmdLine *cmd; gboolean ppp_debug; g_return_val_if_fail (setting != NULL, NULL); pppd_binary = nm_utils_find_helper ("pppd", NULL, err); if (!pppd_binary) return NULL; /* Create pppd command line */ cmd = nm_cmd_line_new (); nm_cmd_line_add_string (cmd, pppd_binary); nm_cmd_line_add_string (cmd, "nodetach"); nm_cmd_line_add_string (cmd, "lock"); /* NM handles setting the default route */ nm_cmd_line_add_string (cmd, "nodefaultroute"); /* Allow IPv6 to be configured by IPV6CP */ nm_cmd_line_add_string (cmd, "ipv6"); nm_cmd_line_add_string (cmd, ","); ppp_debug = !!getenv ("NM_PPP_DEBUG"); if (nm_logging_enabled (LOGL_DEBUG, LOGD_PPP)) ppp_debug = TRUE; if (ppp_debug) nm_cmd_line_add_string (cmd, "debug"); if (ppp_name) { nm_cmd_line_add_string (cmd, "user"); nm_cmd_line_add_string (cmd, ppp_name); } if (pppoe) { char *dev_str; const char *pppoe_service; nm_cmd_line_add_string (cmd, "plugin"); nm_cmd_line_add_string (cmd, "rp-pppoe.so"); dev_str = g_strdup_printf ("nic-%s", priv->parent_iface); nm_cmd_line_add_string (cmd, dev_str); g_free (dev_str); pppoe_service = nm_setting_pppoe_get_service (pppoe); if (pppoe_service) { nm_cmd_line_add_string (cmd, "rp_pppoe_service"); nm_cmd_line_add_string (cmd, pppoe_service); } } else if (adsl) { const gchar *protocol = nm_setting_adsl_get_protocol (adsl); if (!strcmp (protocol, NM_SETTING_ADSL_PROTOCOL_PPPOA)) { guint32 vpi = nm_setting_adsl_get_vpi (adsl); guint32 vci = nm_setting_adsl_get_vci (adsl); const char *encaps = nm_setting_adsl_get_encapsulation (adsl); gchar *vpivci; nm_cmd_line_add_string (cmd, "plugin"); nm_cmd_line_add_string (cmd, "pppoatm.so"); vpivci = g_strdup_printf("%d.%d", vpi, vci); nm_cmd_line_add_string (cmd, vpivci); g_free (vpivci); if (g_strcmp0 (encaps, NM_SETTING_ADSL_ENCAPSULATION_LLC) == 0) nm_cmd_line_add_string (cmd, "llc-encaps"); else /*if (g_strcmp0 (encaps, NM_SETTING_ADSL_ENCAPSULATION_VCMUX) == 0)*/ nm_cmd_line_add_string (cmd, "vc-encaps"); } else if (!strcmp (protocol, NM_SETTING_ADSL_PROTOCOL_PPPOE)) { nm_cmd_line_add_string (cmd, "plugin"); nm_cmd_line_add_string (cmd, "rp-pppoe.so"); nm_cmd_line_add_string (cmd, priv->parent_iface); } nm_cmd_line_add_string (cmd, "noipdefault"); } else { nm_cmd_line_add_string (cmd, priv->parent_iface); /* Don't send some random address as the local address */ nm_cmd_line_add_string (cmd, "noipdefault"); } if (nm_setting_ppp_get_baud (setting)) nm_cmd_line_add_int (cmd, nm_setting_ppp_get_baud (setting)); /* noauth by default, because we certainly don't have any information * with which to verify anything the peer gives us if we ask it to * authenticate itself, which is what 'auth' really means. */ nm_cmd_line_add_string (cmd, "noauth"); if (nm_setting_ppp_get_refuse_eap (setting)) nm_cmd_line_add_string (cmd, "refuse-eap"); if (nm_setting_ppp_get_refuse_pap (setting)) nm_cmd_line_add_string (cmd, "refuse-pap"); if (nm_setting_ppp_get_refuse_chap (setting)) nm_cmd_line_add_string (cmd, "refuse-chap"); if (nm_setting_ppp_get_refuse_mschap (setting)) nm_cmd_line_add_string (cmd, "refuse-mschap"); if (nm_setting_ppp_get_refuse_mschapv2 (setting)) nm_cmd_line_add_string (cmd, "refuse-mschap-v2"); if (nm_setting_ppp_get_nobsdcomp (setting)) nm_cmd_line_add_string (cmd, "nobsdcomp"); if (nm_setting_ppp_get_no_vj_comp (setting)) nm_cmd_line_add_string (cmd, "novj"); if (nm_setting_ppp_get_nodeflate (setting)) nm_cmd_line_add_string (cmd, "nodeflate"); if (nm_setting_ppp_get_require_mppe (setting)) nm_cmd_line_add_string (cmd, "require-mppe"); if (nm_setting_ppp_get_require_mppe_128 (setting)) nm_cmd_line_add_string (cmd, "require-mppe-128"); if (nm_setting_ppp_get_mppe_stateful (setting)) nm_cmd_line_add_string (cmd, "mppe-stateful"); if (nm_setting_ppp_get_crtscts (setting)) nm_cmd_line_add_string (cmd, "crtscts"); /* Always ask for DNS, we don't have to use them if the connection * overrides the returned servers. */ nm_cmd_line_add_string (cmd, "usepeerdns"); if (nm_setting_ppp_get_mru (setting)) { nm_cmd_line_add_string (cmd, "mru"); nm_cmd_line_add_int (cmd, nm_setting_ppp_get_mru (setting)); } if (nm_setting_ppp_get_mtu (setting)) { nm_cmd_line_add_string (cmd, "mtu"); nm_cmd_line_add_int (cmd, nm_setting_ppp_get_mtu (setting)); } nm_cmd_line_add_string (cmd, "lcp-echo-failure"); nm_cmd_line_add_int (cmd, nm_setting_ppp_get_lcp_echo_failure (setting)); nm_cmd_line_add_string (cmd, "lcp-echo-interval"); nm_cmd_line_add_int (cmd, nm_setting_ppp_get_lcp_echo_interval (setting)); /* Avoid pppd to exit if no traffic going through */ nm_cmd_line_add_string (cmd, "idle"); nm_cmd_line_add_int (cmd, 0); nm_cmd_line_add_string (cmd, "ipparam"); nm_cmd_line_add_string (cmd, nm_exported_object_get_path (NM_EXPORTED_OBJECT (self))); nm_cmd_line_add_string (cmd, "plugin"); nm_cmd_line_add_string (cmd, NM_PPPD_PLUGIN); return cmd; } static void pppoe_fill_defaults (NMSettingPpp *setting) { if (!nm_setting_ppp_get_mtu (setting)) g_object_set (setting, NM_SETTING_PPP_MTU, (guint32) 1492, NULL); if (!nm_setting_ppp_get_mru (setting)) g_object_set (setting, NM_SETTING_PPP_MRU, (guint32) 1492, NULL); g_object_set (setting, NM_SETTING_PPP_NOAUTH, TRUE, NM_SETTING_PPP_NODEFLATE, TRUE, NULL); /* FIXME: These commented settings should be set as well, update NMSettingPpp first. */ #if 0 setting->noipdefault = TRUE; setting->default_asyncmap = TRUE; setting->defaultroute = TRUE; setting->hide_password = TRUE; setting->noaccomp = TRUE; setting->nopcomp = TRUE; setting->novj = TRUE; setting->novjccomp = TRUE; #endif } gboolean nm_ppp_manager_start (NMPPPManager *manager, NMActRequest *req, const char *ppp_name, guint32 timeout_secs, GError **err) { NMPPPManagerPrivate *priv; NMConnection *connection; NMSettingPpp *s_ppp; gboolean s_ppp_created = FALSE; NMSettingPppoe *pppoe_setting; NMSettingAdsl *adsl_setting; NMCmdLine *ppp_cmd; char *cmd_str; struct stat st; g_return_val_if_fail (NM_IS_PPP_MANAGER (manager), FALSE); g_return_val_if_fail (NM_IS_ACT_REQUEST (req), FALSE); priv = NM_PPP_MANAGER_GET_PRIVATE (manager); #if !WITH_PPP /* PPP support disabled */ g_set_error_literal (err, NM_MANAGER_ERROR, NM_MANAGER_ERROR_FAILED, "PPP support is not enabled."); return FALSE; #endif priv->pid = 0; /* Make sure /dev/ppp exists (bgo #533064) */ if (stat ("/dev/ppp", &st) || !S_ISCHR (st.st_mode)) nm_utils_modprobe (NULL, FALSE, "ppp_generic", NULL); connection = nm_act_request_get_applied_connection (req); g_assert (connection); s_ppp = nm_connection_get_setting_ppp (connection); if (!s_ppp) { /* If the PPP settings are all default we may not have a PPP setting yet, * so just make a default one here. */ s_ppp = NM_SETTING_PPP (nm_setting_ppp_new ()); s_ppp_created = TRUE; } pppoe_setting = nm_connection_get_setting_pppoe (connection); if (pppoe_setting) { /* We can't modify the applied connection's setting, make a copy */ if (!s_ppp_created) { s_ppp = NM_SETTING_PPP (nm_setting_duplicate ((NMSetting *) s_ppp)); s_ppp_created = TRUE; } pppoe_fill_defaults (s_ppp); } adsl_setting = (NMSettingAdsl *) nm_connection_get_setting (connection, NM_TYPE_SETTING_ADSL); ppp_cmd = create_pppd_cmd_line (manager, s_ppp, pppoe_setting, adsl_setting, ppp_name, err); if (!ppp_cmd) goto out; g_ptr_array_add (ppp_cmd->array, NULL); _LOGI ("starting PPP connection"); cmd_str = nm_cmd_line_to_str (ppp_cmd); _LOGD ("command line: %s", cmd_str); g_free (cmd_str); priv->pid = 0; if (!g_spawn_async (NULL, (char **) ppp_cmd->array->pdata, NULL, G_SPAWN_DO_NOT_REAP_CHILD, nm_utils_setpgid, NULL, &priv->pid, err)) { goto out; } _LOGI ("pppd started with pid %d", priv->pid); priv->ppp_watch_id = g_child_watch_add (priv->pid, (GChildWatchFunc) ppp_watch_cb, manager); priv->ppp_timeout_handler = g_timeout_add_seconds (timeout_secs, pppd_timed_out, manager); priv->act_req = g_object_ref (req); out: if (s_ppp_created) g_object_unref (s_ppp); if (ppp_cmd) nm_cmd_line_destroy (ppp_cmd); return priv->pid > 0; } static void _ppp_kill (NMPPPManager *manager) { NMPPPManagerPrivate *priv; g_return_if_fail (NM_IS_PPP_MANAGER (manager)); priv = NM_PPP_MANAGER_GET_PRIVATE (manager); if (priv->pid) { nm_utils_kill_child_async (priv->pid, SIGTERM, LOGD_PPP, "pppd", 2000, NULL, NULL); priv->pid = 0; } } static void _ppp_cleanup (NMPPPManager *manager) { NMPPPManagerPrivate *priv; g_return_if_fail (NM_IS_PPP_MANAGER (manager)); priv = NM_PPP_MANAGER_GET_PRIVATE (manager); cancel_get_secrets (manager); nm_clear_g_source (&priv->monitor_id); if (priv->monitor_fd >= 0) { /* Get the stats one last time */ monitor_cb (manager); close (priv->monitor_fd); priv->monitor_fd = -1; } nm_clear_g_source (&priv->ppp_timeout_handler); nm_clear_g_source (&priv->ppp_watch_id); } /***********************************************************/ typedef struct { NMPPPManager *manager; GSimpleAsyncResult *result; GCancellable *cancellable; } StopContext; static void stop_context_complete (StopContext *ctx) { if (ctx->cancellable) g_object_unref (ctx->cancellable); g_simple_async_result_complete_in_idle (ctx->result); g_object_unref (ctx->result); g_object_unref (ctx->manager); g_slice_free (StopContext, ctx); } static gboolean stop_context_complete_if_cancelled (StopContext *ctx) { GError *error = NULL; if (g_cancellable_set_error_if_cancelled (ctx->cancellable, &error)) { g_simple_async_result_take_error (ctx->result, error); stop_context_complete (ctx); return TRUE; } return FALSE; } gboolean nm_ppp_manager_stop_finish (NMPPPManager *manager, GAsyncResult *res, GError **error) { return !g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (res), error); } static void kill_child_ready (pid_t pid, gboolean success, int child_status, StopContext *ctx) { if (stop_context_complete_if_cancelled (ctx)) return; stop_context_complete (ctx); } void nm_ppp_manager_stop (NMPPPManager *manager, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data) { NMPPPManagerPrivate *priv = NM_PPP_MANAGER_GET_PRIVATE (manager); StopContext *ctx; ctx = g_slice_new0 (StopContext); ctx->manager = g_object_ref (manager); ctx->result = g_simple_async_result_new (G_OBJECT (manager), callback, user_data, nm_ppp_manager_stop); /* Setup cancellable */ ctx->cancellable = cancellable ? g_object_ref (cancellable) : NULL; if (stop_context_complete_if_cancelled (ctx)) return; /* Cleanup internals */ _ppp_cleanup (manager); /* If no pppd running, we're done */ if (!priv->pid) { stop_context_complete (ctx); return; } /* No cancellable operation, so just wait until it returns always */ nm_utils_kill_child_async (priv->pid, SIGTERM, LOGD_PPP, "pppd", 2000, (NMUtilsKillChildAsyncCb) kill_child_ready, ctx); priv->pid = 0; }