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mce-dbus.c
5365 lines (4441 loc) · 144 KB
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mce-dbus.c
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/**
* @file mce-dbus.c
* D-Bus handling code for the Mode Control Entity
* <p>
* Copyright © 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
* <p>
* @author David Weinehall <david.weinehall@nokia.com>
* @author Ismo Laitinen <ismo.laitinen@nokia.com>
* @author Simo Piiroinen <simo.piiroinen@jollamobile.com>
*
* mce is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* mce 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mce. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mce-dbus.h"
#include "mce.h"
#include "mce-log.h"
#include "mce-lib.h"
#include "mce-wakelock.h"
#include "systemui/dbus-names.h"
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <grp.h>
#include <pwd.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <mce/dbus-names.h>
/* ========================================================================= *
* TYPES & CONSTANTS
* ========================================================================= */
/** How long to block late suspend when mce is sending dbus messages */
#define MCE_DBUS_SEND_SUSPEND_BLOCK_MS 1000
/** Placeholder value for invalid/unknown process id */
#define PEERINFO_NO_PID ((pid_t)-1)
/** Placeholder value for invalid/unknown user id */
#define PEERINFO_NO_UID ((uid_t)-1)
/** Placeholder value for invalid/unknown group id */
#define PEERINFO_NO_GID ((gid_t)-1)
/** Root user id */
#define PEERINFO_ROOT_UID ((uid_t)0)
/** Root group id */
#define PEERINFO_ROOT_GID ((gid_t)0)
/** D-Bus handler callback function */
typedef gboolean (*handler_callback_t)(DBusMessage *const msg);
/** D-Bus handler structure */
typedef struct
{
handler_callback_t callback; /**< Handler callback */
gchar *sender; /**< Service name to match */
gchar *interface; /**< The interface to listen on */
gchar *rules; /**< Additional matching rules */
gchar *name; /**< Method call or signal name */
gchar *args; /**< Introspect XML data */
int type; /**< DBUS_MESSAGE_TYPE */
bool privileged; /**< Allowed for privileged users only */
} handler_struct_t;
/** Possible values for "privileged" peer checks */
typedef enum
{
/** Client/service is not available / details are not known yet */
PRIVILEGED_UNKNOWN = -1,
/** Client/service is on D-Bus and it is not a privileged process */
PRIVILEGED_NO,
/** Client/service is on D-Bus and it is a privileged process */
PRIVILEGED_YES,
} privileged_t;
/** Notification details for client exit tracking */
typedef struct peerquit_t peerquit_t;
/** Callback function type for notifying client exits */
typedef gboolean (*peerquit_fn)(DBusMessage *const msg);
struct peerquit_t
{
peerinfo_t *pq_peerinfo;
peerquit_fn pq_callback;
};
/** Notification details for client state tracking */
typedef struct peernotify_t peernotify_t;
struct peernotify_t
{
peerinfo_t *pn_peerinfo;
peernotify_fn pn_callback;
gpointer pn_userdata;
GDestroyNotify pn_userfree;
guint pn_idle_id;
};
struct peerinfo_t
{
/** Availability / property query IPC state */
peerstate_t pi_state;
/** D-Bus name to track */
gchar *pi_name;
/** Unique bus name of the name owner */
gchar *pi_owner_name;
/** Signal match that has been sent to D-Bus daemon */
gchar *pi_rule;
/** Process id of the D-Bus name owner */
pid_t pi_owner_pid;
/** Cached effective user id of the D-Bus name owner */
uid_t pi_owner_uid;
/** Cached effective group id of the D-Bus name owner */
gid_t pi_owner_gid;
/** Cached command line of the Bus name owner */
gchar *pi_owner_cmd;
/** Optional datapipe to use for service availability signaling */
datapipe_struct *pi_datapipe;
/** Client exit notifications for this D-Bus name */
GQueue pi_quit_callbacks; // -> peerquit_t *
/** Client stat notifications for this D-Bus name */
GQueue pi_notifications; // -> peernotify_t
/** Queue of privileged method calls waiting for peer details */
GQueue pi_priv_methods; // -> DBusMessage *
/** Pending org.freedesktop.DBus.GetNameOwner method call */
DBusPendingCall *pi_name_owner_pc;
/** Pending org.freedesktop.DBus.GetConnectionUnixProcessID method call */
DBusPendingCall *pi_name_pid_pc;
/** Timer for delayed PEERSTATE_STALE -> PEERSTATE_STOPPED transition */
guint pi_expunge_id;
/** Timer for delayed PEERSTATE_STOPPED -> PEERSTATE_DELETED transition */
guint pi_delete_id;
/** Fixed size buffer for providing peer details for debugging purposes */
char pi_repr[128];
};
/* ========================================================================= *
* FUNCTIONALITY
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* SUSPEND_PROOFING
* ------------------------------------------------------------------------- */
static void mdb_callgate_detach_cb (void *aptr);
static void mdb_callgate_attach (DBusPendingCall *pc);
void mce_dbus_pending_call_blocks_suspend (DBusPendingCall *pc);
/* ------------------------------------------------------------------------- *
* DEBUG_HELPERS
* ------------------------------------------------------------------------- */
static dbus_bool_t mce_dbus_message_repr_any (FILE *file, DBusMessageIter *iter);
char *mce_dbus_message_iter_repr (DBusMessageIter *iter);
char *mce_dbus_message_repr (DBusMessage *const msg);
/* ------------------------------------------------------------------------- *
* HANDLER_STRUCT_T
* ------------------------------------------------------------------------- */
static inline void handler_struct_set_sender (handler_struct_t *self, const char *val);
static inline void handler_struct_set_type (handler_struct_t *self, int val);
static inline void handler_struct_set_interface (handler_struct_t *self, const char *val);
static inline void handler_struct_set_args (handler_struct_t *self, const char *val);
static inline void handler_struct_set_name (handler_struct_t *self, const char *val);
static inline void handler_struct_set_rules (handler_struct_t *self, const char *val);
static inline void handler_struct_set_callback (handler_struct_t *self, handler_callback_t val);
static inline void handler_struct_set_privileged (handler_struct_t *self, bool val);
static void handler_struct_delete (handler_struct_t *self);
static handler_struct_t *handler_struct_create (void);
/* ------------------------------------------------------------------------- *
* PEERSTATE_T
* ------------------------------------------------------------------------- */
const char *peerstate_repr (peerstate_t state);
/* ------------------------------------------------------------------------- *
* PEERQUIT_T
* ------------------------------------------------------------------------- */
static peerquit_t *peerquit_create (peerinfo_t *parent, peerquit_fn callback);
static void peerquit_delete (peerquit_t *self);
static void peerquit_notify (peerquit_t *self, DBusMessage *msg);
/* ------------------------------------------------------------------------- *
* PEERNOTIFY_T
* ------------------------------------------------------------------------- */
static gboolean peernotify_idle_cb (gpointer aptr);
static void peernotify_schedule (peernotify_t *self);
static void peernotify_unschedule (peernotify_t *self);
static void peernotify_execute (peernotify_t *self);
static peernotify_t *peernotify_create (peerinfo_t *peerinfo, peernotify_fn callback, gpointer userdata, GDestroyNotify userfree);
static void peernotify_delete (peernotify_t *self);
/* ------------------------------------------------------------------------- *
* PEERINFO_T
* ------------------------------------------------------------------------- */
static gchar *peerinfo_guess_cmd (pid_t pid);
static inline void peerinfo_ctor (peerinfo_t *self, const char *name);
static inline void peerinfo_dtor (peerinfo_t *self);
peerinfo_t *peerinfo_create (const char *name);
void peerinfo_delete (peerinfo_t *self);
void peerinfo_delete_cb (void *self);
static void peerinfo_enter_state (peerinfo_t *self);
static void peerinfo_leave_state (peerinfo_t *self);
static void peerinfo_set_state (peerinfo_t *self, peerstate_t state);
peerstate_t peerinfo_get_state (const peerinfo_t *self);
static const char *peerinfo_repr (peerinfo_t *self);
const char *peerinfo_name (const peerinfo_t *self);
const char *peerinfo_get_owner_name (const peerinfo_t *self);
static void peerinfo_set_owner_name (peerinfo_t *self, const char *name);
pid_t peerinfo_get_owner_pid (const peerinfo_t *self);
static void peerinfo_set_owner_pid (peerinfo_t *self, pid_t pid);
uid_t peerinfo_get_owner_uid (const peerinfo_t *self);
static void peerinfo_set_owner_uid (peerinfo_t *self, uid_t uid);
gid_t peerinfo_get_owner_gid (const peerinfo_t *self);
static void peerinfo_set_owner_gid (peerinfo_t *self, gid_t gid);
const char *peerinfo_get_owner_cmd (const peerinfo_t *self);
static void peerinfo_set_owner_cmd (peerinfo_t *self, const char *cmd);
static privileged_t peerinfo_get_privileged (const peerinfo_t *self, bool no_caching);
static void peerinfo_set_datapipe (peerinfo_t *self, datapipe_struct *datapipe);
static void peerinfo_query_owner_ign (peerinfo_t *self);
static void peerinfo_query_owner_rsp (DBusPendingCall *pc, void *aptr);
static void peerinfo_query_owner_req (peerinfo_t *self);
static void peerinfo_query_pid_ign (peerinfo_t *self);
static void peerinfo_query_pid_rsp (DBusPendingCall *pc, void *aptr);
static void peerinfo_query_pid_req (peerinfo_t *self);
static void peerinfo_query_expunge_ign (peerinfo_t *self);
static gboolean peerinfo_query_expunge_tmo (gpointer aptr);
static void peerinfo_query_expunge_req (peerinfo_t *self);
static void peerinfo_query_delete_ign (peerinfo_t *self);
static gboolean peerinfo_query_delete_tmo (gpointer aptr);
static void peerinfo_query_delete_req (peerinfo_t *self);
static peerquit_t *peerinfo_add_quit_callback (peerinfo_t *self, peerquit_fn callback);
static void peerinfo_remove_quit_callback (peerinfo_t *self, peerquit_t *quit);
static void peerinfo_execute_quit_callbacks (peerinfo_t *self);
static void peerinfo_flush_quit_callbacks (peerinfo_t *self);
static GList *peerinfo_find_notify_slot (peerinfo_t *self, peernotify_fn callback, gpointer userdata);
static void peerinfo_flush_notify_callbacks (peerinfo_t *self);
static void peerinfo_execute_notify_callbacks (peerinfo_t *self);
static void peerinfo_add_notify_callback (peerinfo_t *self, peernotify_fn callback, gpointer userdata, GDestroyNotify userfree);
static void peerinfo_remove_notify_callback (peerinfo_t *self, peernotify_fn callback, gpointer userdata);
static void peerinfo_queue_method (peerinfo_t *self, DBusMessage *req);
static void peerinfo_flush_methods (peerinfo_t *self);
static void peerinfo_handle_methods (peerinfo_t *self);
/* ------------------------------------------------------------------------- *
* PEER_TRACKING
* ------------------------------------------------------------------------- */
static DBusHandlerResult mce_dbus_peerinfo_filter_cb (DBusConnection *con, DBusMessage *msg, void *user_data);
static void mce_dbus_init_peerinfo (void);
static void mce_dbus_quit_peerinfo (void);
peerinfo_t *mce_dbus_get_peerinfo (const char *name);
peerinfo_t *mce_dbus_add_peerinfo (const char *name);
void mce_dbus_update_peerinfo (const char *name, const char *owner);
void mce_dbus_del_peerinfo (const char *name);
const char *mce_dbus_get_peerdesc (const char *name);
/* ------------------------------------------------------------------------- *
* MESSAGE_SENDING
* ------------------------------------------------------------------------- */
DBusConnection *dbus_connection_get (void);
DBusMessage *dbus_new_signal (const gchar *const path, const gchar *const interface, const gchar *const name);
static DBusMessage *dbus_new_error (DBusMessage *req, const char *err, const char *fmt, ...);
DBusMessage *dbus_new_method_call (const gchar *const service, const gchar *const path, const gchar *const interface, const gchar *const name);
DBusMessage *dbus_new_method_reply (DBusMessage *const message);
gboolean dbus_send_message (DBusMessage *const msg);
static gboolean dbus_send_message_with_reply_handler (DBusMessage *const msg, DBusPendingCallNotifyFunction callback, int timeout, void *user_data, DBusFreeFunction user_free, DBusPendingCall **ppc);
static gboolean dbus_send_va (const char *service, const char *path, const char *interface, const char *name, DBusPendingCallNotifyFunction callback, int timeout, void *user_data, DBusFreeFunction user_free, DBusPendingCall **ppc, int first_arg_type, va_list va);
gboolean dbus_send_ex (const char *service, const char *path, const char *interface, const char *name, DBusPendingCallNotifyFunction callback, void *user_data, DBusFreeFunction user_free, DBusPendingCall **ppc, int first_arg_type, ...);
gboolean dbus_send_ex2 (const char *service, const char *path, const char *interface, const char *name, DBusPendingCallNotifyFunction callback, int timeout, void *user_data, DBusFreeFunction user_free, DBusPendingCall **ppc, int first_arg_type, ...);
gboolean dbus_send (const gchar *const service, const gchar *const path, const gchar *const interface, const gchar *const name, DBusPendingCallNotifyFunction callback, int first_arg_type, ...);
/* ------------------------------------------------------------------------- *
* METHOD_CALL_HANDLERS
* ------------------------------------------------------------------------- */
static gboolean version_get_dbus_cb (DBusMessage *const msg);
static gboolean suspend_stats_get_dbus_cb (DBusMessage *const req);
static gboolean verbosity_get_dbus_cb (DBusMessage *const req);
static gboolean config_get_dbus_cb (DBusMessage *const msg);
static gboolean verbosity_set_dbus_cb (DBusMessage *const req);
static gboolean config_get_all_dbus_cb (DBusMessage *const req);
static gboolean config_reset_dbus_cb (DBusMessage *const msg);
static gboolean config_set_dbus_cb (DBusMessage *const msg);
static gboolean introspect_dbus_cb (DBusMessage *const req);
/* ------------------------------------------------------------------------- *
* CONFIG_VALUES
* ------------------------------------------------------------------------- */
static const char **string_array_from_gconf_value (GConfValue *conf, int *pcount);
static dbus_int32_t *int_array_from_gconf_value (GConfValue *conf, int *pcount);
static dbus_bool_t *bool_array_from_gconf_value (GConfValue *conf, int *pcount);
static double *float_array_from_gconf_value (GConfValue *conf, int *pcount);
static const char *type_signature (GConfValueType type);
static const char *value_signature (GConfValue *conf);
static bool append_gconf_value_to_dbus_iterator (DBusMessageIter *iter, GConfValue *conf);
static bool append_gconf_entry_to_dbus_iterator (DBusMessageIter *iter, GConfEntry *entry);
static bool append_gconf_entries_to_dbus_iterator (DBusMessageIter *iter, GSList *entries);
static bool append_gconf_value_to_dbus_message (DBusMessage *reply, GConfValue *conf);
void mce_dbus_send_config_notification (GConfEntry *entry);
static void value_list_free (GSList *list);
static GSList *value_list_from_string_array (DBusMessageIter *iter);
static GSList *value_list_from_int_array (DBusMessageIter *iter);
static GSList *value_list_from_bool_array (DBusMessageIter *iter);
static GSList *value_list_from_float_array (DBusMessageIter *iter);
/* ------------------------------------------------------------------------- *
* MESSAGE_DISPATCH
* ------------------------------------------------------------------------- */
static gboolean check_rules (DBusMessage *const msg, const char *rules);
static gchar *mce_dbus_build_signal_match (const gchar *sender, const gchar *interface, const gchar *name, const gchar *rules);
static void mce_dbus_squeeze_slist (GSList **list);
static bool mce_dbus_match (const char *msg_val, const char *hnd_val);
static DBusHandlerResult msg_handler (DBusConnection *const connection, DBusMessage *const msg, gpointer const user_data);
static gconstpointer mce_dbus_handler_add_ex (const gchar *const sender, const gchar *const interface, const gchar *const name, const gchar *const args, const gchar *const rules, const guint type, gboolean (*callback)(DBusMessage *const msg), bool privileged);
static void mce_dbus_handler_remove (gconstpointer cookie);
static void mce_dbus_handler_remove_cb (gpointer handler, gpointer user_data);
void mce_dbus_handler_register (mce_dbus_handler_t *self);
void mce_dbus_handler_unregister (mce_dbus_handler_t *self);
void mce_dbus_handler_register_array (mce_dbus_handler_t *array);
void mce_dbus_handler_unregister_array (mce_dbus_handler_t *array);
/* ------------------------------------------------------------------------- *
* OWNER_MONITORING
* ------------------------------------------------------------------------- */
static peerquit_t *find_monitored_service (const gchar *service, GSList *monitor_list);
gssize mce_dbus_owner_monitor_add (const gchar *service, gboolean (*callback)(DBusMessage *const msg), GSList **monitor_list, gssize max_num);
gssize mce_dbus_owner_monitor_remove (const gchar *service, GSList **monitor_list);
void mce_dbus_owner_monitor_remove_all (GSList **monitor_list);
/* ------------------------------------------------------------------------- *
* SERVICE_MANAGEMENT
* ------------------------------------------------------------------------- */
static gboolean dbus_acquire_services (void);
static void dbus_quit_message_handler (void);
static gboolean dbus_init_message_handler (void);
/* ------------------------------------------------------------------------- *
* MESSAGE_ITER
* ------------------------------------------------------------------------- */
const char *mce_dbus_type_repr (int type);
bool mce_dbus_iter_at_end (DBusMessageIter *iter);
static bool mce_dbus_iter_req_type (DBusMessageIter *iter, int want);
static bool mce_dbus_iter_get_basic (DBusMessageIter *iter, void *pval, int type);
bool mce_dbus_iter_get_object (DBusMessageIter *iter, const char **pval);
bool mce_dbus_iter_get_string (DBusMessageIter *iter, const char **pval);
bool mce_dbus_iter_get_bool (DBusMessageIter *iter, bool *pval);
bool mce_dbus_iter_get_int32 (DBusMessageIter *iter, dbus_int32_t *pval);
bool mce_dbus_iter_get_uint32 (DBusMessageIter *iter, dbus_uint32_t *pval);
static bool mce_dbus_iter_get_container (DBusMessageIter *iter, DBusMessageIter *sub, int type);
bool mce_dbus_iter_get_array (DBusMessageIter *iter, DBusMessageIter *sub);
bool mce_dbus_iter_get_struct (DBusMessageIter *iter, DBusMessageIter *sub);
bool mce_dbus_iter_get_entry (DBusMessageIter *iter, DBusMessageIter *sub);
bool mce_dbus_iter_get_variant (DBusMessageIter *iter, DBusMessageIter *sub);
/* ------------------------------------------------------------------------- *
* PEER_IDENTITY
* ------------------------------------------------------------------------- */
const char *mce_dbus_get_name_owner_ident (const char *name);
const char *mce_dbus_get_message_sender_ident (DBusMessage *msg);
/* ------------------------------------------------------------------------- *
* INTROSPECT_SUPPORT
* ------------------------------------------------------------------------- */
static void introspect_add_methods (FILE *file, const char *interface);
static void introspect_add_signals (FILE *file, const char *interface);
static void introspect_add_defaults (FILE *file);
static void introspect_com_nokia_mce_request (FILE *file);
static void introspect_com_nokia_mce_signal (FILE *file);
static void introspect_com_nokia_mce (FILE *file);
static void introspect_com_nokia (FILE *file);
static void introspect_com (FILE *file);
static void introspect_root (FILE *file);
static bool introspectable_signal (const char *interface, const char *member);
/* ------------------------------------------------------------------------- *
* DBUS_NAME_OWNER_TRACKING
* ------------------------------------------------------------------------- */
const char *mce_dbus_nameowner_get (const char *name);
static char *mce_dbus_nameowner_watch (const char *name);
static void mce_dbus_nameowner_unwatch (char *rule);
/* ------------------------------------------------------------------------- *
* MODULE_INIT_QUIT
* ------------------------------------------------------------------------- */
DBusConnection *dbus_bus_get (DBusBusType type, DBusError *err);
DBusConnection *dbus_bus_get_private (DBusBusType type, DBusError *err);
static void mce_dbus_init_privileged_uid (void);
static void mce_dbus_init_privileged_gid (void);
gboolean mce_dbus_init (const gboolean systembus);
void mce_dbus_exit (void);
/* ========================================================================= *
* DATA
* ========================================================================= */
/** Pointer to the DBusConnection */
static DBusConnection *dbus_connection = NULL;
/** List of all D-Bus handlers */
static GSList *dbus_handlers = NULL; // -> handler_struct_t *
/** Cached UID for "privileged" user; assume root only */
static uid_t mce_dbus_privileged_uid = PEERINFO_ROOT_UID;
/** Cached GID for "privileged" group; assume root only */
static gid_t mce_dbus_privileged_gid = PEERINFO_ROOT_GID;
/* ========================================================================= *
* SUSPEND_PROOFING
* ========================================================================= */
/** Pending call callgate slot destry callback function
*
* Called when pending call ref count drops to zero.
*
* Releases the ultiplexed wakelock that has been attached
* to the pending call object via mdb_callgate_attach().
*
* @param aptr Name of the attached wakelock
*/
static void mdb_callgate_detach_cb(void *aptr)
{
char *name = aptr;
mce_log(LL_DEBUG, "detach %s", name);
mce_wakelock_release(name);
g_free(name);
}
/** Block suspend while mce is waiting for a reply to a method call
*
* Take advantage of the fact that custom data attached to a pending
* call object gets destroyed along with the object itself and create
* unique wakelock that is used for blocking the device from entering
* suspend until:
*
* a) the wait for pending call is canceled
* b) mce has received and processed the reply message
*
* @param pc Pending call object to suspend proof
*/
static void mdb_callgate_attach(DBusPendingCall *pc)
{
static dbus_int32_t slot = -1;
static unsigned uniq = 0;
gchar *name = 0;
if( !pc )
goto EXIT;
if( slot == -1 && !dbus_pending_call_allocate_data_slot(&slot) )
goto EXIT;
if( !(name = g_strdup_printf("dbus_call_%u", ++uniq)) )
goto EXIT;
mce_log(LL_DEBUG, "attach %s", name);
if( dbus_pending_call_set_data(pc, slot, name, mdb_callgate_detach_cb) ) {
mce_wakelock_obtain(name, -1);
name = 0;
}
EXIT:
g_free(name);
}
/** Public function for making dbus method calls suspend proof
*
* NOTE: We would not need this function if all of the mce code base
* would use dbus_send_ex() based method call handling.
*
* FIXME: Fix all code that uses dbus_connection_send_with_reply()
* so that dbus_send_ex() is used instead.
*
* @param pc Pending call object to protect
*/
void mce_dbus_pending_call_blocks_suspend(DBusPendingCall *pc)
{
mdb_callgate_attach(pc);
}
/* ========================================================================= *
* DEBUG_HELPERS
* ========================================================================= */
/** Emit one iterm from dbus message iterator to file
*
* @param file output file
* @param iter dbus message parse position
*
* @return TRUE if more items can be parsed, FALSE otherwise
*/
static dbus_bool_t
mce_dbus_message_repr_any(FILE *file, DBusMessageIter *iter)
{
dbus_any_t val = { .u64 = 0 };
DBusMessageIter sub;
switch( dbus_message_iter_get_arg_type(iter) ) {
case DBUS_TYPE_INVALID:
return FALSE;
default:
case DBUS_TYPE_UNIX_FD:
fprintf(file, " ???");
return FALSE;
case DBUS_TYPE_BYTE:
dbus_message_iter_get_basic(iter, &val.o);
fprintf(file, " byte:%d", val.o);
break;
case DBUS_TYPE_BOOLEAN:
dbus_message_iter_get_basic(iter, &val.b);
fprintf(file, " bool:%d", val.b);
break;
case DBUS_TYPE_INT16:
dbus_message_iter_get_basic(iter, &val.i16);
fprintf(file, " i16:%d", val.i16);
break;
case DBUS_TYPE_INT32:
dbus_message_iter_get_basic(iter, &val.i32);
fprintf(file, " i32:%d", val.i32);
break;
case DBUS_TYPE_INT64:
dbus_message_iter_get_basic(iter, &val.i64);
fprintf(file, " i64:%lld", (long long)val.i64);
break;
case DBUS_TYPE_UINT16:
dbus_message_iter_get_basic(iter, &val.u16);
fprintf(file, " u16:%u", val.u16);
break;
case DBUS_TYPE_UINT32:
dbus_message_iter_get_basic(iter, &val.u32);
fprintf(file, " u32:%u", val.u32);
break;
case DBUS_TYPE_UINT64:
dbus_message_iter_get_basic(iter, &val.u64);
fprintf(file, " u64:%llu", (unsigned long long)val.u64);
break;
case DBUS_TYPE_DOUBLE:
dbus_message_iter_get_basic(iter, &val.d);
fprintf(file, " dbl:%g", val.d);
break;
case DBUS_TYPE_STRING:
dbus_message_iter_get_basic(iter, &val.s);
fprintf(file, " str:\"%s\"", val.s);
break;
case DBUS_TYPE_OBJECT_PATH:
dbus_message_iter_get_basic(iter, &val.s);
fprintf(file, " obj:\"%s\"", val.s);
break;
case DBUS_TYPE_SIGNATURE:
dbus_message_iter_get_basic(iter, &val.s);
fprintf(file, " sgn:\"%s\"", val.s);
break;
case DBUS_TYPE_ARRAY:
dbus_message_iter_recurse(iter, &sub);
fprintf(file, " [");
while( mce_dbus_message_repr_any(file, &sub) ) {}
fprintf(file, " ]");
break;
case DBUS_TYPE_VARIANT:
dbus_message_iter_recurse(iter, &sub);
fprintf(file, " var");
mce_dbus_message_repr_any(file, &sub);
break;
case DBUS_TYPE_STRUCT:
dbus_message_iter_recurse(iter, &sub);
fprintf(file, " {");
while( mce_dbus_message_repr_any(file, &sub) ) {}
fprintf(file, " }");
break;
case DBUS_TYPE_DICT_ENTRY:
dbus_message_iter_recurse(iter, &sub);
fprintf(file, " key");
mce_dbus_message_repr_any(file, &sub);
fprintf(file, " val");
mce_dbus_message_repr_any(file, &sub);
break;
}
return dbus_message_iter_next(iter);
}
/** Convert dbus message read iterator to string
*
* Caller must release returned string with free().
*
* @param iter dbus message iterator
*
* @returns representation of the iterator, or NULL
*/
char *
mce_dbus_message_iter_repr(DBusMessageIter *iter)
{
size_t size = 0;
char *data = 0;
FILE *file = open_memstream(&data, &size);
if( !iter )
goto EXIT;
while( mce_dbus_message_repr_any(file, iter) ) {}
EXIT:
fclose(file);
return data;
}
/** Convert dbus message to string
*
* Caller must release returned string with free().
*
* @param msg dbus message
*
* @returns representation of the dbus message, or NULL
*/
char *
mce_dbus_message_repr(DBusMessage *const msg)
{
size_t size = 0;
char *data = 0;
FILE *file = open_memstream(&data, &size);
const char *iface = dbus_message_get_interface(msg);
const char *member = dbus_message_get_member(msg);
int type = dbus_message_get_type(msg);
const char *tname = dbus_message_type_to_string(type);
const char *sender = dbus_message_get_sender(msg);
fprintf(file, "%s", tname);
if( sender ) fprintf(file, " from %s", sender);
if( iface ) fprintf(file, " %s", iface);
if( member ) fprintf(file, " %s", member);
DBusMessageIter iter;
dbus_message_iter_init(msg, &iter);
if( dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_INVALID )
goto EXIT;
fprintf(file, ":");
while( mce_dbus_message_repr_any(file, &iter) ) {}
EXIT:
fclose(file);
return data;
}
/* ========================================================================= *
* HANDLER_STRUCT_T
* ========================================================================= */
/** Set sender for D-Bus handler structure */
static inline void handler_struct_set_sender(handler_struct_t *self, const char *val)
{
g_free(self->sender), self->sender = val ? g_strdup(val) : 0;
}
/** Set handler type for D-Bus handler structure */
static inline void handler_struct_set_type(handler_struct_t *self, int val)
{
self->type = val;
}
/** Set interface name for D-Bus handler structure */
static inline void handler_struct_set_interface(handler_struct_t *self, const char *val)
{
g_free(self->interface), self->interface = val ? g_strdup(val) : 0;
}
/** Set introspect args for D-Bus handler structure */
static inline void handler_struct_set_args(handler_struct_t *self, const char *val)
{
g_free(self->args), self->args = val ? g_strdup(val) : 0;
}
/** Set member name for D-Bus handler structure */
static inline void handler_struct_set_name(handler_struct_t *self, const char *val)
{
g_free(self->name), self->name = val ? g_strdup(val) : 0;
}
/** Set custom rules for D-Bus handler structure */
static inline void handler_struct_set_rules(handler_struct_t *self, const char *val)
{
g_free(self->rules), self->rules = val ? g_strdup(val) : 0;
}
/** Set callback function for D-Bus handler structure */
static inline void handler_struct_set_callback(handler_struct_t *self,
handler_callback_t val)
{
self->callback = val;
}
/** Set privileged requirement for D-Bus handler structure */
static inline void handler_struct_set_privileged(handler_struct_t *self, bool val)
{
self->privileged = val;
}
/** Release D-Bus handler structure */
static void handler_struct_delete(handler_struct_t *self)
{
if( !self )
goto EXIT;
g_free(self->args);
g_free(self->name);
g_free(self->rules);
g_free(self->interface);
g_free(self->sender);
g_free(self);
EXIT:
return;
}
/** Allocate D-Bus handler structure */
static handler_struct_t *handler_struct_create(void)
{
handler_struct_t *self = g_malloc0(sizeof *self);
self->sender = 0;
self->interface = 0;
self->rules = 0;
self->name = 0;
self->args = 0;
self->type = DBUS_MESSAGE_TYPE_INVALID;
self->privileged = false;
return self;
}
/* ========================================================================= *
* PEERSTATE_T
* ========================================================================= */
const char *
peerstate_repr(peerstate_t state)
{
const char *repr = "PEERSTATE_INVALID";
switch( state ) {
case PEERSTATE_INITIAL: repr = "PEERSTATE_INITIAL"; break;
case PEERSTATE_QUERY_OWNER: repr = "PEERSTATE_QUERY_OWNER"; break;
case PEERSTATE_QUERY_PID: repr = "PEERSTATE_QUERY_PID"; break;
case PEERSTATE_RUNNING: repr = "PEERSTATE_RUNNING"; break;
case PEERSTATE_STALE: repr = "PEERSTATE_STALE"; break;
case PEERSTATE_STOPPED: repr = "PEERSTATE_STOPPED"; break;
case PEERSTATE_DELETED: repr = "PEERSTATE_DELETED"; break;
default: break;
}
return repr;
}
/* ========================================================================= *
* PEERQUIT_T
* ========================================================================= */
static peerquit_t *
peerquit_create(peerinfo_t *parent, peerquit_fn callback)
{
peerquit_t *self = g_malloc0(sizeof *self);
self->pq_peerinfo = parent;
self->pq_callback = callback;
mce_log(LL_DEBUG, "create quit notify: %s -> %p",
peerinfo_name(self->pq_peerinfo),
self->pq_callback);
return self;
}
static void
peerquit_delete(peerquit_t *self)
{
if( self )
{
mce_log(LL_DEBUG, "delete quit notify: %s -> %p",
peerinfo_name(self->pq_peerinfo),
self->pq_callback);
g_free(self);
}
}
static void
peerquit_notify(peerquit_t *self, DBusMessage *msg)
{
mce_log(LL_DEBUG, "execute quit notify: %s -> %p",
peerinfo_name(self->pq_peerinfo),
self->pq_callback);
self->pq_callback(msg);
}
/* ========================================================================= *
* PEERNOTIFY_T
* ========================================================================= */
/** Callback for Notifying initial peer state
*
* @param aptr peernotify_t object as void pointer
*
* @return FALSE to stop idle callback from being repeated
*/
static gboolean
peernotify_idle_cb(gpointer aptr)
{
peernotify_t *self = aptr;
if( self->pn_idle_id ) {
self->pn_idle_id = 0;
peernotify_execute(self);
}
return FALSE;
}
/** Schedule initial state notification for freshly added tracker
*
* Is called as a consequence of peerinfo_add_notify_callback() call.
*
* @param self peernotify_t object
*/
static void
peernotify_schedule(peernotify_t *self)
{
if( !self->pn_idle_id ) {
self->pn_idle_id = g_idle_add(peernotify_idle_cb, self);
}
}
/** Cancel initial state notification for freshly added tracker
*
* Is called a part of notify object cleanup / if the tracking
* state change notification gets emitted before idle callback
* gets a chance to get dispatched.
*
* @param self peernotify_t object
*/
static void
peernotify_unschedule(peernotify_t *self)
{
if( self->pn_idle_id ) {
g_source_remove(self->pn_idle_id), self->pn_idle_id = 0;
}
}
/** Notify peer tracking state change
*
* @param self peernotify_t object
*/
static void
peernotify_execute(peernotify_t *self)
{
peernotify_unschedule(self);
if( self->pn_callback ) {
self->pn_callback(self->pn_peerinfo, self->pn_userdata);
}
}
/** Create peer state tracking object
*
* @param peerinfo D-Bus client being tracked
* @param callback Notification function to call on state change
* @param userdata A pointer that should be passed to notification callback
* @param userfree free() like function to call on userdata on cleanup
*
* @param self peernotify_t object
*/
static peernotify_t *
peernotify_create(peerinfo_t *peerinfo,
peernotify_fn callback,
gpointer userdata,
GDestroyNotify userfree)
{
peernotify_t *self = calloc(1, sizeof *self);
self->pn_peerinfo = peerinfo;
self->pn_callback = callback;
self->pn_userdata = userdata;
self->pn_userfree = userfree;
self->pn_idle_id = 0;
peernotify_schedule(self);
return self;
}
/** Delete peer state tracking object
*
* @param self peernotify_t object, or NULL
*/
static void
peernotify_delete(peernotify_t *self)
{
if( self != 0 )
{
peernotify_unschedule(self);
if( self->pn_userdata && self->pn_userfree )
self->pn_userfree(self->pn_userdata);
self->pn_peerinfo = 0;
self->pn_callback = 0;
self->pn_userdata = 0;
self->pn_userfree = 0;
free(self);
}
}
/* ========================================================================= *
* PEERINFO_T
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* misc helpers
* ------------------------------------------------------------------------- */
static gchar *
peerinfo_guess_cmd(pid_t pid)
{
gchar *cmd = 0;
int file = -1;
char path[256];
unsigned char text[64];