/**
- * This plug-in helps to monitor the GPS connected to a system.
- * It reads the data comming from GPSd.
- It look for the following parameters.
- */
+ * collectd - src/gps.c
+ * Copyright (C) 2015 Nicolas JOURDEN
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Nicolas JOURDEN <nicolas.jourden at laposte.net>
+ * Florian octo Forster <octo at collectd.org>
+ * Marc Fournier <marc.fournier at camptocamp.com>
+ **/
-#include "collectd.h"
#include "common.h"
#include "plugin.h"
+#include "utils_time.h"
+#include "collectd.h"
-#if HAVE_GPS_H
-#include <gps.h>
-#endif
+#define CGPS_TRUE 1
+#define CGPS_FALSE 0
+#define CGPS_DEFAULT_HOST "localhost"
+#define CGPS_DEFAULT_PORT "2947" /* DEFAULT_GPSD_PORT */
+#define CGPS_DEFAULT_TIMEOUT MS_TO_CDTIME_T(15)
+#define CGPS_DEFAULT_PAUSE_CONNECT TIME_T_TO_CDTIME_T(5)
+#define CGPS_MAX_ERROR 100
+#define CGPS_CONFIG "?WATCH={\"enable\":true,\"json\":true,\"nmea\":false}\r\n"
-#if HAVE_LIBPTHREAD
+#include <gps.h>
#include <pthread.h>
-#endif
-typedef struct
-{
+typedef struct {
char *host;
char *port;
- int timeout;
-} gps_definition_t;
-static gps_definition_t gps_data_config;
+ cdtime_t timeout;
+ cdtime_t pause_connect;
+} cgps_config_t;
typedef struct {
- int satellites;
- double vdop;
- double hdop;
-} gpsDATA_t;
-static gpsDATA_t gps_data_read;
+ gauge_t sats_used;
+ gauge_t sats_visible;
+ gauge_t hdop;
+ gauge_t vdop;
+} cgps_data_t;
+
+static cgps_config_t cgps_config_data;
+static cgps_data_t cgps_data = {NAN, NAN, NAN, NAN};
-static const char *config_keys[] =
-{
- "Host",
- "Port",
- "Timeout"
-};
-static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+static pthread_t cgps_thread_id;
+static pthread_mutex_t cgps_data_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t cgps_thread_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t cgps_thread_cond = PTHREAD_COND_INITIALIZER;
+static int cgps_thread_shutdown = CGPS_FALSE;
+static int cgps_thread_running = CGPS_FALSE;
+/**
+ * Non blocking pause for the thread.
+ */
+static int cgps_thread_pause(cdtime_t pTime) {
+ cdtime_t until = cdtime() + pTime;
-// Thread items:
-static pthread_t connector = (pthread_t) 0;
-static pthread_mutex_t data_mutex = PTHREAD_MUTEX_INITIALIZER;
+ pthread_mutex_lock(&cgps_thread_lock);
+ pthread_cond_timedwait(&cgps_thread_cond, &cgps_thread_lock,
+ &CDTIME_T_TO_TIMESPEC(until));
+ int ret = !cgps_thread_shutdown;
+
+ pthread_mutex_lock(&cgps_thread_lock);
+ return ret;
+}
/**
- * Thread reading from GPSd.
+ * Thread reading from gpsd.
*/
-static void * gps_collectd_thread (void * pData)
-{
- struct gps_data_t gps_data;
-
- while (1)
- {
- if (gps_open(gps_data_config.host, gps_data_config.port, &gps_data) < 0)
- {
- printf ("cannot connect to: %s:%s", gps_data_config.host, gps_data_config.port);
- sleep(60);
+static void *cgps_thread(void *pData) {
+ struct gps_data_t gpsd_conn;
+ unsigned int err_count;
+ cgps_thread_running = CGPS_TRUE;
+
+ while (CGPS_TRUE) {
+ pthread_mutex_lock(&cgps_thread_lock);
+ if (cgps_thread_shutdown == CGPS_TRUE) {
+ goto quit;
+ }
+ pthread_mutex_unlock(&cgps_thread_lock);
+
+ err_count = 0;
+
+#if GPSD_API_MAJOR_VERSION > 4
+ int status =
+ gps_open(cgps_config_data.host, cgps_config_data.port, &gpsd_conn);
+#else
+ int status =
+ gps_open_r(cgps_config_data.host, cgps_config_data.port, &gpsd_conn);
+#endif
+ if (status < 0) {
+ WARNING("gps plugin: connecting to %s:%s failed: %s",
+ cgps_config_data.host, cgps_config_data.port, gps_errstr(status));
+
+ // Here we make a pause until a new tentative to connect, we check also if
+ // the thread does not need to stop.
+ if (cgps_thread_pause(cgps_config_data.pause_connect) == CGPS_FALSE) {
+ goto quit;
+ }
+
continue;
}
- gps_stream(&gps_data, WATCH_ENABLE | WATCH_JSON, NULL);
+ gps_stream(&gpsd_conn, WATCH_ENABLE | WATCH_JSON | WATCH_NEWSTYLE, NULL);
+ gps_send(&gpsd_conn, CGPS_CONFIG);
+
+ while (CGPS_TRUE) {
+ pthread_mutex_lock(&cgps_thread_lock);
+ if (cgps_thread_shutdown == CGPS_TRUE) {
+ goto stop;
+ }
+ pthread_mutex_unlock(&cgps_thread_lock);
- while (1)
- {
- if (gps_waiting (&gps_data, gps_data_config.timeout))
+#if GPSD_API_MAJOR_VERSION > 4
+ long timeout_us = CDTIME_T_TO_US(cgps_config_data.timeout);
+ if (!gps_waiting(&gpsd_conn, (int)timeout_us))
+#else
+ if (!gps_waiting(&gpsd_conn))
+#endif
{
- if (gps_read (&gps_data) == -1)
- {
- WARNING ("incorrect data.\n");
- }
- else {
- pthread_mutex_lock (&data_mutex);
-
- // Dop data:
- if (isnan(gps_data.dop.vdop) == 0)
- {
- gps_data_read.vdop = gps_data.dop.vdop;
+ continue;
+ }
+
+ if (gps_read(&gpsd_conn) == -1) {
+ WARNING("gps plugin: incorrect data! (err_count: %d)", err_count);
+ err_count++;
+
+ if (err_count > CGPS_MAX_ERROR) {
+ // Server is not responding ...
+ if (gps_send(&gpsd_conn, CGPS_CONFIG) == -1) {
+ WARNING("gps plugin: gpsd seems to be down, reconnecting");
+ gps_close(&gpsd_conn);
+ break;
}
- if (isnan(gps_data.dop.hdop) == 0)
- {
- gps_data_read.hdop = gps_data.dop.hdop;
+ // Server is responding ...
+ else {
+ err_count = 0;
}
+ }
- // Sat in view:
- if ((gps_data.set & LATLON_SET))
- {
- gps_data_read.satellites = gps_data.satellites_used;
- }
+ continue;
+ }
- pthread_mutex_unlock (&data_mutex);
- }
+ pthread_mutex_lock(&cgps_data_lock);
+
+ // Number of sats in view:
+ cgps_data.sats_used = (gauge_t)gpsd_conn.satellites_used;
+ cgps_data.sats_visible = (gauge_t)gpsd_conn.satellites_visible;
+
+ // dilution of precision:
+ cgps_data.vdop = NAN;
+ cgps_data.hdop = NAN;
+ if (cgps_data.sats_used > 0) {
+ cgps_data.hdop = gpsd_conn.dop.hdop;
+ cgps_data.vdop = gpsd_conn.dop.vdop;
}
+
+ DEBUG("gps plugin: %.0f sats used (of %.0f visible), hdop = %.3f, vdop = "
+ "%.3f",
+ cgps_data.sats_used, cgps_data.sats_visible, cgps_data.hdop,
+ cgps_data.vdop);
+
+ pthread_mutex_unlock(&cgps_data_lock);
}
}
- gps_stream(&gps_data, WATCH_DISABLE, NULL);
- gps_close(&gps_data);
-
- pthread_exit ((void *)0);
+stop:
+ DEBUG("gps plugin: thread closing gpsd connection ... ");
+ gps_stream(&gpsd_conn, WATCH_DISABLE, NULL);
+ gps_close(&gpsd_conn);
+quit:
+ DEBUG("gps plugin: thread shutting down ... ");
+ cgps_thread_running = CGPS_FALSE;
+ pthread_mutex_unlock(&cgps_thread_lock);
+ pthread_exit(NULL);
}
-
/**
- * Submit the data.
+ * Submit a piece of the data.
*/
-static void gps_collectd_submit (const char *type, gauge_t value)
-{
- value_t values[1];
+static void cgps_submit(const char *type, gauge_t value,
+ const char *type_instance) {
value_list_t vl = VALUE_LIST_INIT;
- values[0].gauge = value;
-
- vl.values = values;
+ vl.values = &(value_t){.gauge = value};
vl.values_len = 1;
- sstrncpy (vl.host, hostname_g, sizeof (vl.host));
- sstrncpy (vl.plugin, "gps", sizeof (vl.plugin));
- sstrncpy (vl.type, type, sizeof (vl.type));
- sstrncpy (vl.type_instance, "gps", sizeof (vl.type_instance));
+ sstrncpy(vl.plugin, "gps", sizeof(vl.plugin));
+ sstrncpy(vl.type, type, sizeof(vl.type));
+ sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
- plugin_dispatch_values (&vl);
+ plugin_dispatch_values(&vl);
}
-
/**
- * Read the data and submit.
+ * Read the data and submit by piece.
*/
-static int gps_collectd_read ()
-{
- pthread_mutex_lock (&data_mutex);
- gps_collectd_submit("gps_hdop", (gauge_t) gps_data_read.hdop);
- gps_collectd_submit("gps_vdop", (gauge_t) gps_data_read.vdop);
- gps_collectd_submit("gps_sat", (gauge_t) gps_data_read.satellites);
- printf ("gps: hdop=%1.3f, vdop=%1.3f, sat=%02d.\n",
- gps_data_read.hdop,
- gps_data_read.vdop,
- gps_data_read.satellites
- );
- pthread_mutex_unlock (&data_mutex);
- return (0);
-}
+static int cgps_read(void) {
+ cgps_data_t data_copy;
+
+ pthread_mutex_lock(&cgps_data_lock);
+ data_copy = cgps_data;
+ pthread_mutex_unlock(&cgps_data_lock);
+
+ cgps_submit("dilution_of_precision", data_copy.hdop, "horizontal");
+ cgps_submit("dilution_of_precision", data_copy.vdop, "vertical");
+ cgps_submit("satellites", data_copy.sats_used, "used");
+ cgps_submit("satellites", data_copy.sats_visible, "visible");
+ return 0;
+}
/**
* Read configuration.
*/
-static int gps_collectd_config (const char *key, const char *value)
-{
- if (strcasecmp (key, "Host") == 0) {
- if (gps_data_config.host != NULL) free (gps_data_config.host);
- gps_data_config.host = sstrdup (value);
- }
- if (strcasecmp (key, "Port") == 0) {
- if (gps_data_config.port != NULL) free (gps_data_config.port);
- gps_data_config.port = sstrdup (value);
+static int cgps_config(oconfig_item_t *ci) {
+ int i;
+
+ for (i = 0; i < ci->children_num; i++) {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp("Host", child->key) == 0)
+ cf_util_get_string(child, &cgps_config_data.host);
+ else if (strcasecmp("Port", child->key) == 0)
+ cf_util_get_service(child, &cgps_config_data.port);
+ else if (strcasecmp("Timeout", child->key) == 0)
+ cf_util_get_cdtime(child, &cgps_config_data.timeout);
+ else if (strcasecmp("PauseConnect", child->key) == 0)
+ cf_util_get_cdtime(child, &cgps_config_data.pause_connect);
+ else
+ WARNING("gps plugin: Ignoring unknown config option \"%s\".", child->key);
}
- if (strcasecmp (key, "Timeout") == 0) {
- gps_data_config.timeout = (int) strtol (value, NULL, 1000);
+
+ // Controlling the value for timeout:
+ // If set too high it blocks the reading (> 5 s), too low it gets not reading
+ // (< 500 us).
+ // To avoid any issues we replace "out of range" value by the default value.
+ if (cgps_config_data.timeout > TIME_T_TO_CDTIME_T(5) ||
+ cgps_config_data.timeout < US_TO_CDTIME_T(500)) {
+ WARNING("gps plugin: timeout set to %.6f sec. setting to default (%.6f).",
+ CDTIME_T_TO_DOUBLE(cgps_config_data.timeout),
+ CDTIME_T_TO_DOUBLE(CGPS_DEFAULT_TIMEOUT));
+ cgps_config_data.timeout = CGPS_DEFAULT_TIMEOUT;
}
- return (0);
-}
+ return 0;
+}
/**
* Init.
*/
-static int gps_collectd_init (void)
-{
- int err = 0;
-
- printf ("gps: will use %s:%s with timeout %d.\n", gps_data_config.host, gps_data_config.port, gps_data_config.timeout);
+static int cgps_init(void) {
+ int status;
- err = plugin_thread_create (&connector, NULL, gps_collectd_thread, NULL);
+ if (cgps_thread_running == CGPS_TRUE) {
+ DEBUG("gps plugin: error gps thread already running ... ");
+ return 0;
+ }
- if (err != 0) {
- WARNING ("pthread_create() failed.");
- return (-1);
+ DEBUG("gps plugin: config{host: \"%s\", port: \"%s\", timeout: %.6f sec., "
+ "pause connect: %.3f sec.}",
+ cgps_config_data.host, cgps_config_data.port,
+ CDTIME_T_TO_DOUBLE(cgps_config_data.timeout),
+ CDTIME_T_TO_DOUBLE(cgps_config_data.pause_connect));
+
+ status =
+ plugin_thread_create(&cgps_thread_id, NULL, cgps_thread, NULL, "gps");
+ if (status != 0) {
+ ERROR("gps plugin: pthread_create() failed.");
+ return -1;
}
- return (0);
+ return 0;
}
-
/**
* Shutdown.
*/
-static int gps_collectd_shutdown (void)
-{
- if (connector != ((pthread_t) 0)) {
- pthread_kill (connector, SIGTERM);
- connector = (pthread_t) 0;
- }
+static int cgps_shutdown(void) {
+ void *res;
+
+ pthread_mutex_lock(&cgps_thread_lock);
+ cgps_thread_shutdown = CGPS_TRUE;
+ pthread_cond_broadcast(&cgps_thread_cond);
+ pthread_mutex_unlock(&cgps_thread_lock);
- sfree (gps_data_config.port);
- sfree (gps_data_config.host);
+ pthread_join(cgps_thread_id, &res);
+ free(res);
- return (0);
+ // Clean mutex:
+ pthread_mutex_unlock(&cgps_thread_lock);
+ pthread_mutex_destroy(&cgps_thread_lock);
+ pthread_mutex_unlock(&cgps_data_lock);
+ pthread_mutex_destroy(&cgps_data_lock);
+
+ sfree(cgps_config_data.port);
+ sfree(cgps_config_data.host);
+
+ return 0;
}
/**
* Register the module.
*/
-void module_register (void)
-{
- gps_data_config.host = sstrdup ("localhost");
- gps_data_config.port = sstrdup ("2947");
- gps_data_read.hdop = 0;
- gps_data_read.vdop = 0;
- gps_data_read.satellites = 0;
-
- // Read the config params:
- plugin_register_config ("gps", gps_collectd_config, config_keys, config_keys_num);
- // Create the thread:
- plugin_register_init ("gps", gps_collectd_init);
- // Kill the thread and stop.
- plugin_register_shutdown ("gps", gps_collectd_shutdown);
- // Read plugin:
- plugin_register_read ("gps", gps_collectd_read);
+void module_register(void) {
+ cgps_config_data.host = sstrdup(CGPS_DEFAULT_HOST);
+ cgps_config_data.port = sstrdup(CGPS_DEFAULT_PORT);
+ cgps_config_data.timeout = CGPS_DEFAULT_TIMEOUT;
+ cgps_config_data.pause_connect = CGPS_DEFAULT_PAUSE_CONNECT;
+
+ plugin_register_complex_config("gps", cgps_config);
+ plugin_register_init("gps", cgps_init);
+ plugin_register_read("gps", cgps_read);
+ plugin_register_shutdown("gps", cgps_shutdown);
}
-
projects / collectd.git / blobdiff