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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <syslog.h>
#include <math.h>
#include <time.h>
#include <errno.h>
#include <libgen.h>
#include <signal.h>
#ifndef S_SPLINT_S
#include <unistd.h>
#endif /* S_SPLINT_S */
#include "gps.h"
#include "gpsd_config.h"
#if defined(DBUS_EXPORT_ENABLE) && !defined(S_SPLINT_S)
struct privdata_t
{
void (*handler)(struct gps_data_t *);
};
#define PRIVATE(gpsdata) ((struct privdata_t *)(gpsdata)->privdata)
#include <glib.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <dbus/dbus-glib.h>
#include <glib/gprintf.h>
DBusConnection *connection;
static char gpsd_devname[BUFSIZ];
static DBusHandlerResult handle_gps_fix(DBusMessage * message)
{
DBusError error;
/* this packet format was designed before we split eph */
double eph;
struct gps_data_t gpsdata;
dbus_error_init(&error);
(void)memset(&gpsdata, '\0', sizeof(gpsdata));
dbus_message_get_args(message,
&error,
DBUS_TYPE_DOUBLE, &gpsdata.fix.time,
DBUS_TYPE_INT32, &gpsdata.fix.mode,
DBUS_TYPE_DOUBLE, &gpsdata.fix.ept,
DBUS_TYPE_DOUBLE, &gpsdata.fix.latitude,
DBUS_TYPE_DOUBLE, &gpsdata.fix.longitude,
DBUS_TYPE_DOUBLE, &eph,
DBUS_TYPE_DOUBLE, &gpsdata.fix.altitude,
DBUS_TYPE_DOUBLE, &gpsdata.fix.epv,
DBUS_TYPE_DOUBLE, &gpsdata.fix.track,
DBUS_TYPE_DOUBLE, &gpsdata.fix.epd,
DBUS_TYPE_DOUBLE, &gpsdata.fix.speed,
DBUS_TYPE_DOUBLE, &gpsdata.fix.eps,
DBUS_TYPE_DOUBLE, &gpsdata.fix.climb,
DBUS_TYPE_DOUBLE, &gpsdata.fix.epc,
DBUS_TYPE_STRING, &gpsd_devname, DBUS_TYPE_INVALID);
if (gpsdata.fix.mode > MODE_NO_FIX )
gpsdata.status = STATUS_FIX;
else
gpsdata.status = STATUS_NO_FIX;
PRIVATE(&gpsdata)->handler(&gpsdata);
return DBUS_HANDLER_RESULT_HANDLED;
}
/*
* Message dispatching function
*
*/
static DBusHandlerResult signal_handler(DBusConnection * connection,
DBusMessage * message)
{
/* dummy, need to use the variable for some reason */
connection = NULL;
if (dbus_message_is_signal(message, "org.gpsd", "fix"))
return handle_gps_fix(message);
/*
* ignore all other messages
*/
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
int gps_dbus_open(void (*handler)(struct gps_data_t *), struct gps_data_t *gpsdata)
{
GMainLoop *mainloop;
DBusError error;
gpsdata->privdata = (void *)malloc(sizeof(struct privdata_t));
if (gpsdata->privdata == NULL)
return -1;
PRIVATE(gpsdata)->handler = handler;
mainloop = g_main_loop_new(NULL, FALSE);
dbus_error_init(&error);
connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
if (dbus_error_is_set(&error)) {
syslog(LOG_CRIT, "%s: %s", error.name, error.message);
return 3;
}
dbus_bus_add_match(connection, "type='signal'", &error);
if (dbus_error_is_set(&error)) {
syslog(LOG_CRIT, "unable to add match for signals %s: %s", error.name,
error.message);
return 4;
}
if (!dbus_connection_add_filter
(connection, (DBusHandleMessageFunction) signal_handler, NULL,
NULL)) {
syslog(LOG_CRIT, "unable to register filter with the connection");
return 5;
}
dbus_connection_setup_with_g_main(connection, NULL);
g_main_loop_run(mainloop);
return 0;
}
#endif /* defined(DBUS_EXPORT_ENABLE) && !defined(S_SPLINT_S) */
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