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usb_moded-dbus.c
1079 lines (948 loc) · 37.1 KB
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usb_moded-dbus.c
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/**
* @file usb_moded-dbus.c
*
* Copyright (C) 2010 Nokia Corporation. All rights reserved.
* Copyright (C) 2012-2019 Jolla. All rights reserved.
*
* @author: Philippe De Swert <philippe.de-swert@nokia.com>
* @author: Philippe De Swert <phdeswer@lumi.maa>
* @author: Philippe De Swert <philippedeswert@gmail.com>
* @author: Philippe De Swert <philippe.deswert@jollamobile.com>
* @author: Vesa Halttunen <vesa.halttunen@jollamobile.com>
* @author: Slava Monich <slava.monich@jolla.com>
* @author: Martin Jones <martin.jones@jollamobile.com>
* @author: Simo Piiroinen <simo.piiroinen@jollamobile.com>
* @author: Andrew den Exter <andrew.den.exter@jolla.com>
* @author: Andrew den Exter <andrew.den.exter@jollamobile.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Lesser GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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 Lesser GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "usb_moded-dbus-private.h"
#include "usb_moded-config-private.h"
#include "usb_moded-control.h"
#include "usb_moded-log.h"
#include "usb_moded-modes.h"
#include "usb_moded-network.h"
#include <stdlib.h>
#include <string.h>
#include <dbus/dbus-glib-lowlevel.h>
/* ========================================================================= *
* Constants
* ========================================================================= */
#define INIT_DONE_INTERFACE "com.nokia.startup.signal"
#define INIT_DONE_SIGNAL "init_done"
#define INIT_DONE_MATCH "type='signal',interface='"INIT_DONE_INTERFACE"',member='"INIT_DONE_SIGNAL"'"
/* ========================================================================= *
* Prototypes
* ========================================================================= */
/* -- umdbus -- */
static void umdbus_send_config_signal (const char *section, const char *key, const char *value);
static DBusHandlerResult umdbus_msg_handler (DBusConnection *const connection, DBusMessage *const msg, gpointer const user_data);
DBusConnection *umdbus_get_connection (void);
gboolean umdbus_init_connection (void);
gboolean umdbus_init_service (void);
static void umdbus_cleanup_service (void);
void umdbus_cleanup (void);
static int umdbus_send_signal_ex (const char *signal_type, const char *content);
static void umdbus_send_legacy_signal (const char *state_ind);
void umdbus_send_current_state_signal (const char *state_ind);
void umdbus_send_target_state_signal (const char *state_ind);
void umdbus_send_event_signal (const char *state_ind);
int umdbus_send_error_signal (const char *error);
int umdbus_send_supported_modes_signal (const char *supported_modes);
int umdbus_send_available_modes_signal (const char *available_modes);
int umdbus_send_hidden_modes_signal (const char *hidden_modes);
int umdbus_send_whitelisted_modes_signal(const char *whitelist);
static void umdbus_get_name_owner_cb (DBusPendingCall *pc, void *aptr);
gboolean umdbus_get_name_owner_async (const char *name, usb_moded_get_name_owner_fn cb, DBusPendingCall **ppc);
/* ========================================================================= *
* Data
* ========================================================================= */
static DBusConnection *umdbus_connection = NULL;
static gboolean umdbus_service_name_acquired = FALSE;
/** Introspect xml format string for parents of USB_MODE_OBJECT */
static const char umdbus_introspect_template[] =
"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" \"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node name=\"%s\">\n"
" <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
" <method name=\"Introspect\">\n"
" <arg direction=\"out\" name=\"data\" type=\"s\"/>\n"
" </method>\n"
" </interface>\n"
" <interface name=\"org.freedesktop.DBus.Peer\">\n"
" <method name=\"Ping\"/>\n"
" <method name=\"GetMachineId\">\n"
" <arg direction=\"out\" name=\"machine_uuid\" type=\"s\" />\n"
" </method>\n"
" </interface>\n"
" <node name=\"%s\"/>\n"
"</node>\n";
/** Introspect xml data for object path USB_MODE_OBJECT */
static const char umdbus_introspect_usbmoded[] =
"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node name=\"" USB_MODE_OBJECT "\">\n"
" <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
" <method name=\"Introspect\">\n"
" <arg name=\"xml\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" </interface>\n"
" <interface name=\"org.freedesktop.DBus.Peer\">\n"
" <method name=\"Ping\"/>\n"
" <method name=\"GetMachineId\">\n"
" <arg direction=\"out\" name=\"machine_uuid\" type=\"s\" />\n"
" </method>\n"
" </interface>\n"
" <interface name=\"" USB_MODE_INTERFACE "\">\n"
" <method name=\"" USB_MODE_STATE_REQUEST "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_TARGET_STATE_GET "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_STATE_SET "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_CONFIG_SET "\">\n"
" <arg name=\"config\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"config\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_NETWORK_SET "\">\n"
" <arg name=\"key\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"value\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"key\" type=\"s\" direction=\"out\"/>\n"
" <arg name=\"value\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_NETWORK_GET "\">\n"
" <arg name=\"key\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"key\" type=\"s\" direction=\"out\"/>\n"
" <arg name=\"value\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_CONFIG_GET "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_LIST "\">\n"
" <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_AVAILABLE_MODES_GET "\">\n"
" <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_HIDE "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_UNHIDE "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_HIDDEN_GET "\">\n"
" <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_WHITELISTED_MODES_GET "\">\n"
" <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_WHITELISTED_MODES_SET "\">\n"
" <arg name=\"modes\" type=\"s\" direction=\"in\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_WHITELISTED_SET "\">\n"
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"
" <arg name=\"whitelisted\" type=\"b\" direction=\"in\"/>\n"
" </method>\n"
" <method name=\"" USB_MODE_RESCUE_OFF "\"/>\n"
" <signal name=\"" USB_MODE_SIGNAL_NAME "\">\n"
" <arg name=\"mode_or_event\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_CURRENT_STATE_SIGNAL_NAME "\">\n"
" <arg name=\"mode\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_TARGET_STATE_SIGNAL_NAME "\">\n"
" <arg name=\"mode\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_EVENT_SIGNAL_NAME "\">\n"
" <arg name=\"event\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_ERROR_SIGNAL_NAME "\">\n"
" <arg name=\"error\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_SUPPORTED_MODES_SIGNAL_NAME "\">\n"
" <arg name=\"modes\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_AVAILABLE_MODES_SIGNAL_NAME "\">\n"
" <arg name=\"modes\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_CONFIG_SIGNAL_NAME "\">\n"
" <arg name=\"section\" type=\"s\"/>\n"
" <arg name=\"key\" type=\"s\"/>\n"
" <arg name=\"value\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_HIDDEN_MODES_SIGNAL_NAME "\">\n"
" <arg name=\"modes\" type=\"s\"/>\n"
" </signal>\n"
" <signal name=\"" USB_MODE_WHITELISTED_MODES_SIGNAL_NAME "\">\n"
" <arg name=\"modes\" type=\"s\"/>\n"
" </signal>\n"
" </interface>\n"
"</node>\n";
/* ========================================================================= *
* Functions
* ========================================================================= */
/**
* Issues "sig_usb_config_ind" signal.
*/
static void umdbus_send_config_signal(const char *section, const char *key, const char *value)
{
LOG_REGISTER_CONTEXT;
DBusMessage* msg = 0;
if( !section || !key || !value ) {
log_err("config notification with NULL %s",
!section ? "section" : !key ? "key" : value);
goto EXIT;
}
if( !umdbus_service_name_acquired ) {
log_err("config notification without service: [%s] %s=%s",
section, key, value);
goto EXIT;
}
if( !umdbus_connection ) {
log_err("config notification without connection: [%s] %s=%s",
section, key, value);
goto EXIT;
}
log_debug("broadcast signal %s(%s, %s, %s)\n", USB_MODE_CONFIG_SIGNAL_NAME, section, key, value);
msg = dbus_message_new_signal(USB_MODE_OBJECT, USB_MODE_INTERFACE, USB_MODE_CONFIG_SIGNAL_NAME);
if( !msg )
goto EXIT;
dbus_message_append_args(msg, DBUS_TYPE_STRING, §ion,
DBUS_TYPE_STRING, &key,
DBUS_TYPE_STRING, &value,
DBUS_TYPE_INVALID);
dbus_connection_send(umdbus_connection, msg, NULL);
EXIT:
if( msg )
dbus_message_unref(msg);
}
static DBusHandlerResult umdbus_msg_handler(DBusConnection *const connection, DBusMessage *const msg, gpointer const user_data)
{
LOG_REGISTER_CONTEXT;
DBusHandlerResult status = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
DBusMessage *reply = 0;
const char *interface = dbus_message_get_interface(msg);
const char *member = dbus_message_get_member(msg);
const char *object = dbus_message_get_path(msg);
int type = dbus_message_get_type(msg);
(void)user_data;
if(!interface || !member || !object) goto EXIT;
log_debug("DBUS %s %s.%s from %s",
dbus_message_type_to_string(type),
interface, member,
dbus_message_get_sender(msg) ?: "N/A");
if( type == DBUS_MESSAGE_TYPE_SIGNAL )
{
if( !strcmp(interface, INIT_DONE_INTERFACE) && !strcmp(member, INIT_DONE_SIGNAL) ) {
/* Update the cached state value */
usbmoded_set_init_done(true);
/* Auto-disable rescue mode when bootup is finished */
if( usbmoded_get_rescue_mode() ) {
usbmoded_set_rescue_mode(false);
log_debug("init done reached - rescue mode disabled");
}
}
goto EXIT;
}
if( type == DBUS_MESSAGE_TYPE_METHOD_CALL && !strcmp(interface, USB_MODE_INTERFACE) && !strcmp(object, USB_MODE_OBJECT))
{
status = DBUS_HANDLER_RESULT_HANDLED;
if(!strcmp(member, USB_MODE_STATE_REQUEST))
{
const char *mode = control_get_external_mode();
/* To the outside we want to keep CHARGING and CHARGING_FALLBACK the same */
if(!strcmp(MODE_CHARGING_FALLBACK, mode))
mode = MODE_CHARGING;
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID);
}
else if(!strcmp(member, USB_MODE_TARGET_STATE_GET))
{
const char *mode = control_get_target_mode();
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID);
}
else if(!strcmp(member, USB_MODE_STATE_SET))
{
const char *mode = control_get_external_mode();
char *use = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &use, DBUS_TYPE_INVALID)) {
log_err("parse error: %s: %s", err.name, err.message);
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
}
else if( control_get_cable_state() != CABLE_STATE_PC_CONNECTED ) {
/* Mode change makes no sence unless we have a PC connection */
log_warning("Mode '%s' requested while not connected to pc", use);
}
else if( common_valid_mode(use) ) {
/* Mode does not exist */
log_warning("Unknown mode '%s' requested", use);
}
else if( !g_strcmp0(mode, MODE_BUSY) ) {
/* In middle of a pending mode switch */
log_warning("Mode '%s' requested while busy", use);
}
else {
log_debug("Mode '%s' requested", use);
/* Initiate mode switch */
control_set_usb_mode(use);
/* Acknowledge that the mode request was accepted */
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &use, DBUS_TYPE_INVALID);
}
/* Default to returning a generic error reply */
if( !reply )
reply = dbus_message_new_error(msg, DBUS_ERROR_FAILED, member);
dbus_error_free(&err);
}
else if(!strcmp(member, USB_MODE_CONFIG_SET))
{
char *config = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
/* error checking is done when setting configuration */
int ret = config_set_mode_setting(config);
if (ret == SET_CONFIG_UPDATED)
umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_SETTING_KEY, config);
if (SET_CONFIG_OK(ret))
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
}
dbus_error_free(&err);
}
else if(!strcmp(member, USB_MODE_HIDE))
{
char *config = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
/* error checking is done when setting configuration */
int ret = config_set_hide_mode_setting(config);
if (ret == SET_CONFIG_UPDATED)
umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_HIDE_KEY, config);
if (SET_CONFIG_OK(ret))
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
}
dbus_error_free(&err);
}
else if(!strcmp(member, USB_MODE_UNHIDE))
{
char *config = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
/* error checking is done when setting configuration */
int ret = config_set_unhide_mode_setting(config);
if (ret == SET_CONFIG_UPDATED)
umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_HIDE_KEY, config);
if (SET_CONFIG_OK(ret))
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
}
dbus_error_free(&err);
}
else if(!strcmp(member, USB_MODE_HIDDEN_GET))
{
char *config = config_get_hidden_modes();
if(!config)
config = g_strdup("");
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
g_free(config);
}
else if(!strcmp(member, USB_MODE_NETWORK_SET))
{
char *config = 0, *setting = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
/* error checking is done when setting configuration */
int ret = config_set_network_setting(config, setting);
if (ret == SET_CONFIG_UPDATED)
umdbus_send_config_signal(NETWORK_ENTRY, config, setting);
if (SET_CONFIG_OK(ret))
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID);
network_update();
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
}
dbus_error_free(&err);
}
else if(!strcmp(member, USB_MODE_NETWORK_GET))
{
char *config = 0;
char *setting = 0;
DBusError err = DBUS_ERROR_INIT;
if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
{
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
}
else
{
setting = config_get_network_setting(config);
if(setting)
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID);
free(setting);
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
}
}
else if(!strcmp(member, USB_MODE_CONFIG_GET))
{
char *config = config_get_mode_setting();
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
g_free(config);
}
else if(!strcmp(member, USB_MODE_LIST))
{
gchar *mode_list = common_get_mode_list(SUPPORTED_MODES_LIST);
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, (const char *) &mode_list, DBUS_TYPE_INVALID);
g_free(mode_list);
}
else if(!strcmp(member, USB_MODE_AVAILABLE_MODES_GET))
{
gchar *mode_list = common_get_mode_list(AVAILABLE_MODES_LIST);
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply, DBUS_TYPE_STRING, (const char *) &mode_list, DBUS_TYPE_INVALID);
g_free(mode_list);
}
else if(!strcmp(member, USB_MODE_RESCUE_OFF))
{
usbmoded_set_rescue_mode(false);
log_debug("Rescue mode off\n ");
reply = dbus_message_new_method_return(msg);
}
else if(!strcmp(member, USB_MODE_WHITELISTED_MODES_GET))
{
gchar *mode_list = config_get_mode_whitelist();
if(!mode_list)
mode_list = g_strdup("");
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args(reply, DBUS_TYPE_STRING, &mode_list, DBUS_TYPE_INVALID);
g_free(mode_list);
}
else if(!strcmp(member, USB_MODE_WHITELISTED_MODES_SET))
{
const char *whitelist = 0;
DBusError err = DBUS_ERROR_INIT;
if (!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &whitelist, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
int ret = config_set_mode_whitelist(whitelist);
if (ret == SET_CONFIG_UPDATED)
umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_WHITELIST_KEY, whitelist);
if (SET_CONFIG_OK(ret))
{
if ((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args(reply, DBUS_TYPE_STRING, &whitelist, DBUS_TYPE_INVALID);
}
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, whitelist);
}
dbus_error_free(&err);
}
else if (!strcmp(member, USB_MODE_WHITELISTED_SET))
{
const char *mode = 0;
dbus_bool_t enabled = FALSE;
DBusError err = DBUS_ERROR_INIT;
if (!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &mode, DBUS_TYPE_BOOLEAN, &enabled, DBUS_TYPE_INVALID))
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
else
{
int ret = config_set_mode_in_whitelist(mode, enabled);
if (ret == SET_CONFIG_UPDATED)
{
char *whitelist = config_get_mode_whitelist();
if (!whitelist)
whitelist = g_strdup(MODE_UNDEFINED);
umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_WHITELIST_KEY, whitelist);
g_free(whitelist);
}
if (SET_CONFIG_OK(ret))
reply = dbus_message_new_method_return(msg);
else
reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, mode);
}
dbus_error_free(&err);
}
else
{
/*unknown methods are handled here */
reply = dbus_message_new_error(msg, DBUS_ERROR_UNKNOWN_METHOD, member);
}
if( !reply )
{
reply = dbus_message_new_error(msg, DBUS_ERROR_FAILED, member);
}
}
else if( type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
!strcmp(interface, "org.freedesktop.DBus.Introspectable") &&
!strcmp(member, "Introspect"))
{
const gchar *xml = 0;
gchar *tmp = 0;
gchar *err = 0;
size_t len = strlen(object);
const char *pos = USB_MODE_OBJECT;
if( !strncmp(object, pos, len) )
{
if( pos[len] == 0 )
{
/* Full length USB_MODE_OBJECT requested */
xml = umdbus_introspect_usbmoded;
}
else if( pos[len] == '/' )
{
/* Leading part of USB_MODE_OBJECT requested */
gchar *parent = 0;
gchar *child = 0;
parent = g_strndup(pos, len);
pos += len + 1;
len = strcspn(pos, "/");
child = g_strndup(pos, len);
xml = tmp = g_strdup_printf(umdbus_introspect_template,
parent, child);
g_free(child);
g_free(parent);
}
else if( !strcmp(object, "/") )
{
/* Root object needs to be handled separately */
const char *parent = "/";
gchar *child = 0;
pos += 1;
len = strcspn(pos, "/");
child = g_strndup(pos, len);
xml = tmp = g_strdup_printf(umdbus_introspect_template,
parent, child);
g_free(child);
}
}
if( xml )
{
if((reply = dbus_message_new_method_return(msg)))
dbus_message_append_args (reply,
DBUS_TYPE_STRING, &xml,
DBUS_TYPE_INVALID);
}
else
{
err = g_strdup_printf("Object '%s' does not exist", object);
reply = dbus_message_new_error(msg, DBUS_ERROR_UNKNOWN_OBJECT,
err);
}
g_free(err);
g_free(tmp);
if( reply )
{
status = DBUS_HANDLER_RESULT_HANDLED;
}
}
EXIT:
if(reply)
{
if( !dbus_message_get_no_reply(msg) )
{
if( !dbus_connection_send(connection, reply, 0) )
log_debug("Failed sending reply. Out Of Memory!\n");
}
dbus_message_unref(reply);
}
return status;
}
DBusConnection *umdbus_get_connection(void)
{
LOG_REGISTER_CONTEXT;
DBusConnection *connection = 0;
if( umdbus_connection )
connection = dbus_connection_ref(umdbus_connection);
else
log_err("something asked for connection ref while unconnected");
return connection;
}
/**
* Establish D-Bus SystemBus connection
*
* @return TRUE when everything went ok
*/
gboolean umdbus_init_connection(void)
{
LOG_REGISTER_CONTEXT;
gboolean status = FALSE;
DBusError error = DBUS_ERROR_INIT;
/* connect to system bus */
if ((umdbus_connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == NULL)
{
log_debug("Failed to open connection to system message bus; %s\n", error.message);
goto EXIT;
}
/* Initialise message handlers */
if (!dbus_connection_add_filter(umdbus_connection, umdbus_msg_handler, NULL, NULL))
goto EXIT;
/* Listen to init-done signals */
dbus_bus_add_match(umdbus_connection, INIT_DONE_MATCH, 0);
/* Re-check flag file after adding signal listener */
usbmoded_probe_init_done();
/* Connect D-Bus to the mainloop */
dbus_connection_setup_with_g_main(umdbus_connection, NULL);
/* everything went fine */
status = TRUE;
EXIT:
dbus_error_free(&error);
return status;
}
/**
* Reserve "com.meego.usb_moded" D-Bus Service Name
*
* @return TRUE when everything went ok
*/
gboolean umdbus_init_service(void)
{
LOG_REGISTER_CONTEXT;
gboolean status = FALSE;
DBusError error = DBUS_ERROR_INIT;
int ret;
if( !umdbus_connection ) {
goto EXIT;
}
/* Acquire D-Bus service */
ret = dbus_bus_request_name(umdbus_connection, USB_MODE_SERVICE, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
if (ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
{
log_debug("failed claiming dbus name\n");
if( dbus_error_is_set(&error) )
log_debug("DBUS ERROR: %s, %s \n", error.name, error.message);
goto EXIT;
}
log_debug("claimed name %s", USB_MODE_SERVICE);
umdbus_service_name_acquired = TRUE;
/* everything went fine */
status = TRUE;
EXIT:
dbus_error_free(&error);
return status;
}
/** Release "com.meego.usb_moded" D-Bus Service Name
*/
static void umdbus_cleanup_service(void)
{
LOG_REGISTER_CONTEXT;
if( !umdbus_service_name_acquired )
goto EXIT;
umdbus_service_name_acquired = FALSE;
log_debug("release name %s", USB_MODE_SERVICE);
if( umdbus_connection &&
dbus_connection_get_is_connected(umdbus_connection) )
{
dbus_bus_release_name(umdbus_connection, USB_MODE_SERVICE, NULL);
}
EXIT:
return;
}
/**
* Clean up the dbus connections on exit
*
*/
void umdbus_cleanup(void)
{
LOG_REGISTER_CONTEXT;
/* clean up system bus connection */
if (umdbus_connection != NULL)
{
umdbus_cleanup_service();
dbus_connection_remove_filter(umdbus_connection, umdbus_msg_handler, NULL);
dbus_connection_unref(umdbus_connection),
umdbus_connection = NULL;
}
}
/**
* Helper function for sending the different signals
*
* @return 0 on success, 1 on failure
* @param signal_type the type of signal (normal, error, ...)
* @@param content string which can be mode name, error, list of modes, ...
*/
static int umdbus_send_signal_ex(const char *signal_type, const char *content)
{
LOG_REGISTER_CONTEXT;
int result = 1;
DBusMessage* msg = 0;
/* Assume NULL content equals no value / empty list, and that skipping
* signal broadcast is never preferable over sending empty string. */
if( !content )
content = "";
log_debug("broadcast signal %s(%s)\n", signal_type, content);
if( !umdbus_service_name_acquired )
{
log_err("sending signal without service: %s(%s)",
signal_type, content);
goto EXIT;
}
if(!umdbus_connection)
{
log_err("Dbus system connection broken!\n");
goto EXIT;
}
// create a signal and check for errors
msg = dbus_message_new_signal(USB_MODE_OBJECT, USB_MODE_INTERFACE, signal_type );
if (NULL == msg)
{
log_debug("Message Null\n");
goto EXIT;
}
// append arguments onto signal
if (!dbus_message_append_args(msg, DBUS_TYPE_STRING, &content, DBUS_TYPE_INVALID))
{
log_debug("Appending arguments failed. Out Of Memory!\n");
goto EXIT;
}
// send the message on the correct bus and flush the connection
if (!dbus_connection_send(umdbus_connection, msg, 0))
{
log_debug("Failed sending message. Out Of Memory!\n");
goto EXIT;
}
result = 0;
EXIT:
// free the message
if(msg != 0)
dbus_message_unref(msg);
return result;
}
/** Send legacy usb_moded state_or_event signal
*
* The legacy USB_MODE_SIGNAL_NAME signal is used for
* both mode changes and stateless events.
*
* @param state_ind mode name or event name
*/
static void umdbus_send_legacy_signal(const char *state_ind)
{
LOG_REGISTER_CONTEXT;
umdbus_send_signal_ex(USB_MODE_SIGNAL_NAME, state_ind);
}
/** Send usb_moded current state signal
*
* @param state_ind mode name
*/
void umdbus_send_current_state_signal(const char *state_ind)
{
LOG_REGISTER_CONTEXT;
umdbus_send_signal_ex(USB_MODE_CURRENT_STATE_SIGNAL_NAME,
state_ind);
umdbus_send_legacy_signal(state_ind);
}
/** Send usb_moded target state signal
*
* @param state_ind mode name
*/
void umdbus_send_target_state_signal(const char *state_ind)
{
LOG_REGISTER_CONTEXT;
umdbus_send_signal_ex(USB_MODE_TARGET_STATE_SIGNAL_NAME,
state_ind);
}
/** Send usb_moded event signal
*
* @param state_ind event name
*/
void umdbus_send_event_signal(const char *state_ind)
{
LOG_REGISTER_CONTEXT;
umdbus_send_signal_ex(USB_MODE_EVENT_SIGNAL_NAME,
state_ind);
umdbus_send_legacy_signal(state_ind);
}
/**
* Send regular usb_moded error signal
*
* @return 0 on success, 1 on failure
* @param error the error to be signalled
*
*/
int umdbus_send_error_signal(const char *error)
{
LOG_REGISTER_CONTEXT;
return umdbus_send_signal_ex(USB_MODE_ERROR_SIGNAL_NAME, error);
}
/**
* Send regular usb_moded mode list signal
*
* @return 0 on success, 1 on failure
* @param supported_modes list of supported modes
*
*/
int umdbus_send_supported_modes_signal(const char *supported_modes)
{
LOG_REGISTER_CONTEXT;
return umdbus_send_signal_ex(USB_MODE_SUPPORTED_MODES_SIGNAL_NAME, supported_modes);
}
/**
* Send regular usb_moded mode list signal
*
* @return 0 on success, 1 on failure
* @param available_modes list of available modes
*
*/
int umdbus_send_available_modes_signal(const char *available_modes)
{
LOG_REGISTER_CONTEXT;
return umdbus_send_signal_ex(USB_MODE_AVAILABLE_MODES_SIGNAL_NAME, available_modes);
}
/**
* Send regular usb_moded hidden mode list signal
*
* @return 0 on success, 1 on failure
* @param hidden_modes list of supported modes
*
*/
int umdbus_send_hidden_modes_signal(const char *hidden_modes)
{
LOG_REGISTER_CONTEXT;
return umdbus_send_signal_ex(USB_MODE_HIDDEN_MODES_SIGNAL_NAME, hidden_modes);
}
/**
* Send regular usb_moded whitelisted mode list signal
*
* @return 0 on success, 1 on failure
* @param whitelist list of allowed modes
*/
int umdbus_send_whitelisted_modes_signal(const char *whitelist)
{
LOG_REGISTER_CONTEXT;
return umdbus_send_signal_ex(USB_MODE_WHITELISTED_MODES_SIGNAL_NAME, whitelist);
}
/** Async reply handler for umdbus_get_name_owner_async()
*
* @param pc Pending call object pointer
* @param aptr Notify function to call (as a void pointer)
*/
static void umdbus_get_name_owner_cb(DBusPendingCall *pc, void *aptr)
{
LOG_REGISTER_CONTEXT;
usb_moded_get_name_owner_fn cb = aptr;
DBusMessage *rsp = 0;
const char *dta = 0;
DBusError err = DBUS_ERROR_INIT;
if( !(rsp = dbus_pending_call_steal_reply(pc)) ) {
log_err("did not get reply");
goto EXIT;
}
if( dbus_set_error_from_message(&err, rsp) )
{
if( strcmp(err.name, DBUS_ERROR_NAME_HAS_NO_OWNER) )
log_err("error reply: %s: %s", err.name, err.message);
goto EXIT;