openwrt-packages-dist/utils/collectd/patches/900-add-iwinfo-plugin.patch

--- a/configure.ac
+++ b/configure.ac
@@ -710,6 +710,11 @@ AC_CACHE_CHECK([whether clock_boottime a
   ]
 )
 
+# For the iwinfo plugin
+AC_CHECK_LIB([iwinfo], [iwinfo_backend],
+    [with_iwinfo="yes"],
+    [with_iwinfo="no (libiwinfo not found)"]
+)
 
 #
 # Checks for typedefs, structures, and compiler characteristics.
@@ -6127,6 +6132,7 @@ plugin_ipc="no"
 plugin_ipmi="no"
 plugin_ipvs="no"
 plugin_irq="no"
+plugin_iwinfo="no"
 plugin_load="no"
 plugin_log_logstash="no"
 plugin_mcelog="no"
@@ -6538,6 +6544,7 @@ AC_PLUGIN([ipmi],                [$plugi
 AC_PLUGIN([iptables],            [$with_libiptc],           [IPTables rule counters])
 AC_PLUGIN([ipvs],                [$plugin_ipvs],            [IPVS connection statistics])
 AC_PLUGIN([irq],                 [$plugin_irq],             [IRQ statistics])
+AC_PLUGIN([iwinfo],              [$with_iwinfo],            [Common iwinfo wireless statistics])
 AC_PLUGIN([java],                [$with_java],              [Embed the Java Virtual Machine])
 AC_PLUGIN([load],                [$plugin_load],            [System load])
 AC_PLUGIN([log_logstash],        [$plugin_log_logstash],    [Logstash json_event compatible logging])
@@ -6899,6 +6906,7 @@ AC_MSG_RESULT([    libyajl . . . . . . .
 AC_MSG_RESULT([    oracle  . . . . . . . $with_oracle])
 AC_MSG_RESULT([    protobuf-c  . . . . . $have_protoc_c])
 AC_MSG_RESULT([    protoc 3  . . . . . . $have_protoc3])
+AC_MSG_RESULT([    iwinfo  . . . . . . . $with_iwinfo])
 AC_MSG_RESULT()
 AC_MSG_RESULT([  Features:])
 AC_MSG_RESULT([    daemon mode . . . . . $enable_daemon])
@@ -6957,6 +6965,7 @@ AC_MSG_RESULT([    ipmi  . . . . . . . .
 AC_MSG_RESULT([    iptables  . . . . . . $enable_iptables])
 AC_MSG_RESULT([    ipvs  . . . . . . . . $enable_ipvs])
 AC_MSG_RESULT([    irq . . . . . . . . . $enable_irq])
+AC_MSG_RESULT([    iwinfo  . . . . . . . $enable_iwinfo])
 AC_MSG_RESULT([    java  . . . . . . . . $enable_java])
 AC_MSG_RESULT([    load  . . . . . . . . $enable_load])
 AC_MSG_RESULT([    logfile . . . . . . . $enable_logfile])
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -137,6 +137,7 @@
 #@BUILD_PLUGIN_IPTABLES_TRUE@LoadPlugin iptables
 #@BUILD_PLUGIN_IPVS_TRUE@LoadPlugin ipvs
 #@BUILD_PLUGIN_IRQ_TRUE@LoadPlugin irq
+#@BUILD_PLUGIN_IWINFO_TRUE@LoadPlugin iwinfo
 #@BUILD_PLUGIN_JAVA_TRUE@LoadPlugin java
 @BUILD_PLUGIN_LOAD_TRUE@@BUILD_PLUGIN_LOAD_TRUE@LoadPlugin load
 #@BUILD_PLUGIN_LPAR_TRUE@LoadPlugin lpar
@@ -720,6 +721,12 @@
 #	IgnoreSelected true
 #</Plugin>
 
+#<Plugin iwinfo>
+#   Interface "ath0"
+#   Interface "ra0"
+#   Interface "wlan0"
+#</Plugin>
+
 #<Plugin java>
 #	JVMArg "-verbose:jni"
 #	JVMArg "-Djava.class.path=@prefix@/share/collectd/java/collectd-api.jar"
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -3503,6 +3503,27 @@ and all other interrupts are collected.
 
 =back
 
+=head2 Plugin C<iwinfo>
+
+=over 4
+
+=item B<Interface> I<Interface>
+
+Select this interface. By default all detected wireless interfaces will be
+collected. For a more detailed description see B<IgnoreSelected> below.
+
+=item B<IgnoreSelected> I<true>|I<false>
+
+If no configuration if given, the B<iwinfo>-plugin will collect data from all
+detected wireless interfaces. You can use the B<Interface>-option to pick the
+interfaces you're interested in. Sometimes, however, it's easier/preferred to
+collect all interfaces I<except> a few ones. This option enables you to do
+that: By setting B<IgnoreSelected> to I<true> the effect of B<Interface> is
+inverted: All selected interfaces are ignored and all other interfaces are
+collected.
+
+=back
+
 =head2 Plugin C<java>
 
 The I<Java> plugin makes it possible to write extensions for collectd in Java.
--- /dev/null
+++ b/src/iwinfo.c
@@ -0,0 +1,150 @@
+/**
+ * collectd - src/iwinfo.c
+ * Copyright (C) 2011  Jo-Philipp Wich
+ *
+ * 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.
+ *
+ * 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 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 "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "utils_ignorelist.h"
+
+#include <stdint.h>
+#include <iwinfo.h>
+
+#define PROCNETDEV "/proc/net/dev"
+
+static const char *config_keys[] = {
+	"Interface",
+	"IgnoreSelected"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static ignorelist_t *ignorelist = NULL;
+
+static int iwinfo_config(const char *key, const char *value)
+{
+	if (ignorelist == NULL)
+		ignorelist = ignorelist_create(1);
+
+	if (ignorelist == NULL)
+		return 1;
+
+	if (strcasecmp(key, "Interface") == 0)
+		ignorelist_add(ignorelist, value);
+	else if (strcasecmp(key, "IgnoreSelected") == 0)
+		ignorelist_set_invert(ignorelist, IS_TRUE(value) ? 0 : 1);
+	else
+		return -1;
+
+	return 0;
+}
+
+static void iwinfo_submit(const char *ifname, const char *type, int value)
+{
+	value_t values[1];
+	value_list_t vl = VALUE_LIST_INIT;
+
+	values[0].gauge = value;
+
+	vl.values = values;
+	vl.values_len = 1;
+
+	sstrncpy(vl.host, hostname_g, sizeof(vl.host));
+	sstrncpy(vl.plugin, "iwinfo", sizeof(vl.plugin));
+	sstrncpy(vl.plugin_instance, ifname, sizeof(vl.plugin_instance));
+	sstrncpy(vl.type, type, sizeof(vl.type));
+	/*sstrncpy(vl.type_instance, "", sizeof(vl.type_instance));*/
+
+	plugin_dispatch_values(&vl);
+}
+
+static void iwinfo_process(const char *ifname)
+{
+	int val;
+	char buf[IWINFO_BUFSIZE];
+	const struct iwinfo_ops *iw = iwinfo_backend(ifname);
+
+	/* does appear to be a wifi iface */
+	if (iw)
+	{
+		if (iw->bitrate(ifname, &val))
+			val = 0;
+		iwinfo_submit(ifname, "bitrate", val * 1000);
+
+		if (iw->signal(ifname, &val))
+			val = 0;
+		iwinfo_submit(ifname, "signal_power", val);
+
+		if (iw->noise(ifname, &val))
+			val = 0;
+		iwinfo_submit(ifname, "signal_noise", val);
+
+		if (iw->quality(ifname, &val))
+			val = 0;
+		iwinfo_submit(ifname, "signal_quality", val);
+
+		if (iw->assoclist(ifname, buf, &val))
+			val = 0;
+		iwinfo_submit(ifname, "stations",
+		              val / sizeof(struct iwinfo_assoclist_entry));
+	}
+
+	iwinfo_finish();
+}
+
+static int iwinfo_read(void)
+{
+	char line[1024];
+	char ifname[128];
+	FILE *f;
+
+	f = fopen(PROCNETDEV, "r");
+	if (f == NULL)
+	{
+		char err[1024];
+		WARNING("iwinfo: Unable to open " PROCNETDEV ": %s",
+		        sstrerror(errno, err, sizeof(err)));
+		return -1;
+	}
+
+	while (fgets(line, sizeof(line), f))
+	{
+		if (!strchr(line, ':'))
+			continue;
+
+		if (!sscanf(line, " %127[^:]", ifname))
+			continue;
+
+		if (ignorelist_match(ignorelist, ifname))
+			continue;
+
+		if (strstr(ifname, "mon.") || strstr(ifname, ".sta") ||
+		    strstr(ifname, "tmp.") || strstr(ifname, "wifi"))
+			continue;
+
+		iwinfo_process(ifname);
+	}
+
+	fclose(f);
+
+	return 0;
+}
+
+void module_register(void)
+{
+	plugin_register_config("iwinfo", iwinfo_config, config_keys, config_keys_num);
+	plugin_register_read("iwinfo", iwinfo_read);
+}
--- a/src/types.db
+++ b/src/types.db
@@ -269,6 +269,7 @@ voltage_threshold       value:GAUGE:U:U,
 vs_memory               value:GAUGE:0:9223372036854775807
 vs_processes            value:GAUGE:0:65535
 vs_threads              value:GAUGE:0:65535
+stations                value:GAUGE:0:256
 
 #
 # Legacy types
--- a/Makefile.am
+++ b/Makefile.am
@@ -983,6 +983,14 @@ irq_la_LDFLAGS = $(PLUGIN_LDFLAGS)
 irq_la_LIBADD = libignorelist.la
 endif
 
+if BUILD_PLUGIN_IWINFO
+pkglib_LTLIBRARIES += iwinfo.la
+iwinfo_la_SOURCES = src/iwinfo.c
+#iwinfo_la_LDFLAGS = -module -avoid-version
+iwinfo_la_LDFLAGS = $(PLUGIN_LDFLAGS)
+iwinfo_la_LIBADD = -liwinfo libignorelist.la
+endif
+
 if BUILD_PLUGIN_JAVA
 pkglib_LTLIBRARIES += java.la
 java_la_SOURCES = src/java.c