* collectd - src/wireless.c
* Copyright (C) 2006,2007 Florian octo Forster
*
- * 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; only version 2 of the License is applicable.
+ * 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:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ * 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.
*
- * Author:
- * Florian octo Forster <octo at verplant.org>
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
**/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
-#if defined(KERNEL_LINUX)
-# define WIRELESS_HAVE_READ 1
-#else
-# define WIRELESS_HAVE_READ 0
+#if !KERNEL_LINUX
+# error "No applicable input method."
#endif
#define WIRELESS_PROC_FILE "/proc/net/wireless"
-#if WIRELESS_HAVE_READ
#if 0
static double wireless_dbm_to_watt (double dbm)
{
vl.values = values;
vl.values_len = 1;
- vl.time = time (NULL);
- strcpy (vl.host, hostname_g);
- strcpy (vl.plugin, "wireless");
- strncpy (vl.plugin_instance, plugin_instance,
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "wireless", sizeof (vl.plugin));
+ sstrncpy (vl.plugin_instance, plugin_instance,
sizeof (vl.plugin_instance));
+ sstrncpy (vl.type, type, sizeof (vl.type));
- plugin_dispatch_values (type, &vl);
+ plugin_dispatch_values (&vl);
} /* void wireless_submit */
+#define POWER_MIN -90.0
+#define POWER_MAX -50.0
+static double wireless_percent_to_power (double quality)
+{
+ assert ((quality >= 0.0) && (quality <= 100.0));
+
+ return ((quality * (POWER_MAX - POWER_MIN)) + POWER_MIN);
+} /* double wireless_percent_to_power */
+
static int wireless_read (void)
{
#ifdef KERNEL_LINUX
devices_found = 0;
while (fgets (buffer, sizeof (buffer), fh) != NULL)
{
+ char *endptr;
+
numfields = strsplit (buffer, fields, 8);
if (numfields < 5)
fields[0][len] = '\0';
device = fields[0];
- quality = atof (fields[2]);
- power = atof (fields[3]);
- noise = atof (fields[4]);
-
- /* Fill in invalid values when conversion failed.. */
- if (quality == 0.0)
- quality = -1.0; /* quality >= 0 */
-
- if (power == 0.0)
- power = 1.0; /* power <= 0 */
- if (noise == 0.0)
- noise = 1.0; /* noise <= 0 */
+ quality = strtod (fields[2], &endptr);
+ if (fields[2] == endptr)
+ quality = -1.0; /* invalid */
+
+ /* power [dBm] < 0.0 */
+ power = strtod (fields[3], &endptr);
+ if (fields[3] == endptr)
+ power = 1.0; /* invalid */
+ else if ((power >= 0.0) && (power <= 100.0))
+ power = wireless_percent_to_power (power);
+ else if ((power > 100.0) && (power <= 256.0))
+ power = power - 256.0;
+ else if (power > 0.0)
+ power = 1.0; /* invalid */
+
+ /* noise [dBm] < 0.0 */
+ noise = strtod (fields[4], &endptr);
+ if (fields[4] == endptr)
+ noise = 1.0; /* invalid */
+ else if ((noise >= 0.0) && (noise <= 100.0))
+ noise = wireless_percent_to_power (noise);
+ else if ((noise > 100.0) && (noise <= 256.0))
+ noise = noise - 256.0;
+ else if (noise > 0.0)
+ noise = 1.0; /* invalid */
wireless_submit (device, "signal_quality", quality);
wireless_submit (device, "signal_power", power);
return (0);
} /* int wireless_read */
-#endif /* WIRELESS_HAVE_READ */
void module_register (void)
{
-#if WIRELESS_HAVE_READ
plugin_register_read ("wireless", wireless_read);
-#endif /* WIRELESS_HAVE_READ */
} /* void module_register */
projects / collectd.git / blobdiff