X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Fwireless.c;h=f2a3cf5832de46792371fbc2ff499ac42efaa114;hp=09df407070c01d5b7503c75238d088290055d636;hb=633c3966f770e4d46651a2fe219a18d8a9907a9f;hpb=756704084860d8ad21db61f2a677cbd80b008be4

diff --git a/src/wireless.c b/src/wireless.c
index 09df4070..f2a3cf58 100644
--- a/src/wireless.c
+++ b/src/wireless.c
@@ -2,21 +2,26 @@
  * 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"
@@ -55,15 +60,24 @@ static void wireless_submit (const char *plugin_instance, const char *type,
 
 	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
@@ -93,6 +107,8 @@ static int wireless_read (void)
 	devices_found = 0;
 	while (fgets (buffer, sizeof (buffer), fh) != NULL)
 	{
+		char *endptr;
+
 		numfields = strsplit (buffer, fields, 8);
 
 		if (numfields < 5)
@@ -106,19 +122,32 @@ static int wireless_read (void)
 		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);