add wireless measurement probe infrastructure, developed at Fraunhofer FOKUS

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15050 3c298f89-4303-0410-b956-a3cf2f4a3e73

13 files changed, 2923 insertions, 0 deletions

diff --git a/package/wprobe/Makefile b/package/wprobe/Makefile
new file mode 100644
index 000000000..89f0450f0
--- /dev/null
+++ b/package/wprobe/Makefile
@@ -0,0 +1,112 @@
+# 
+# Copyright (C) 2008 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=wprobe
+PKG_VERSION:=1
+
+PKG_BUILD_DEPENDS:=libnl libipfix
+
+include $(INCLUDE_DIR)/package.mk
+
+define KernelPackage/wprobe
+  SUBMENU:=Network Support
+  TITLE:=Wireless driver probe infrastructure
+  FILES:= \
+  	$(PKG_BUILD_DIR)/kernel/wprobe.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,01,wprobe)
+endef
+
+define KernelPackage/wprobe/description
+  A module that exports measurement data from wireless driver to user space
+endef
+
+define Package/wprobe-info
+  SECTION:=net
+  CATEGORY:=Network
+  DEPENDS:=+kmod-wprobe
+  TITLE:=Wireless measurement utility
+endef
+
+define Package/wprobe-info/description
+  wprobe-info uses the wprobe kernel module to query
+  wireless driver measurement data from an interface
+endef
+
+define Package/wprobe-export
+  SECTION:=net
+  CATEGORY:=Network
+  DEPENDS:=+kmod-wprobe
+  TITLE:=Wireless measurement data exporter
+endef
+
+define Package/wprobe-export/description
+  wprobe-export uses the wprobe kernel module to export
+  wireless driver measurement data via the IPFIX protocol
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) src/* $(PKG_BUILD_DIR)/
+endef
+
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
+
+define Build/Compile/kmod
+	$(MAKE) -C $(LINUX_DIR) \
+		CROSS_COMPILE="$(TARGET_CROSS)" \
+		ARCH="$(LINUX_KARCH)" \
+		SUBDIRS="$(PKG_BUILD_DIR)/kernel" \
+		KERNELDIR=$(LINUX_DIR) \
+		CC="$(TARGET_CC)" \
+		EXTRA_CFLAGS="-I$(PKG_BUILD_DIR)/kernel" \
+		modules
+endef
+
+define Build/Compile/lib
+	$(MAKE) -C $(PKG_BUILD_DIR)/user \
+		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		CPPFLAGS="$(TARGET_CPPFLAGS) -I$(PKG_BUILD_DIR)/kernel" \
+		LDFLAGS="$(TARGET_LDFLAGS)" \
+		LIBNL="$(STAGING_DIR)/usr/lib/libnl.a"
+endef
+
+define Build/Compile/exporter
+	$(MAKE) -C $(PKG_BUILD_DIR)/exporter \
+		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		CPPFLAGS="$(TARGET_CPPFLAGS) -I$(PKG_BUILD_DIR)/kernel -I$(PKG_BUILD_DIR)/user" \
+		LDFLAGS="$(TARGET_LDFLAGS)" \
+		LIBS="$(PKG_BUILD_DIR)/user/libwprobe.a $(STAGING_DIR)/usr/lib/libipfix.a $(STAGING_DIR)/usr/lib/libmisc.a $(STAGING_DIR)/usr/lib/libnl.a -lm"
+endef
+
+define Build/Compile
+	$(Build/Compile/kmod)
+	$(Build/Compile/lib)
+	$(Build/Compile/exporter)
+endef
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include
+	$(CP) $(PKG_BUILD_DIR)/kernel/linux $(1)/usr/include
+endef
+
+define Package/wprobe-info/install
+	$(INSTALL_DIR) $(1)/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/user/wprobe-info $(1)/sbin/
+endef
+
+define Package/wprobe-export/install
+	$(INSTALL_DIR) $(1)/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/exporter/wprobe-export $(1)/sbin/
+endef
+
+$(eval $(call KernelPackage,wprobe))
+$(eval $(call BuildPackage,wprobe-info))
+$(eval $(call BuildPackage,wprobe-export))
diff --git a/package/wprobe/src/exporter/Makefile b/package/wprobe/src/exporter/Makefile
new file mode 100644
index 000000000..c8e489a6b
--- /dev/null
+++ b/package/wprobe/src/exporter/Makefile
@@ -0,0 +1,2 @@
+wprobe-export: wprobe-export.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
diff --git a/package/wprobe/src/exporter/wprobe-export.c b/package/wprobe/src/exporter/wprobe-export.c
new file mode 100644
index 000000000..974f4a10f
--- /dev/null
+++ b/package/wprobe/src/exporter/wprobe-export.c
@@ -0,0 +1,295 @@
+/*
+**     exporter.c - example exporter
+**
+**     Copyright Fraunhofer FOKUS
+**
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <ipfix_def.h>
+#include <ipfix_def_fokus.h>
+#include <ipfix_fields_fokus.h>
+
+#include <ipfix.h>
+#include <mlog.h>
+#include <wprobe.h>
+
+static ipfix_datarecord_t g_data  = { NULL, NULL, 0 };
+static int do_close = 0;
+
+struct wprobe_mapping {
+	int id;
+	float scale;
+	const char *wprobe_id;
+	struct wprobe_value *val;
+};
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(_array) (sizeof(_array) / sizeof((_array)[0]))
+#endif
+
+#define WMAP(_id, _name, ...) \
+	{ \
+		.scale = 1.0f, \
+		.id = IPFIX_FT_WPROBE_##_id##_AVG, \
+		.wprobe_id = _name \
+		, ## __VA_ARGS__ \
+	}
+
+#define WPROBE_OFFSET	2
+
+static struct wprobe_mapping map_globals[] = {
+	WMAP(NOISE, "noise"),
+	WMAP(PHY_BUSY, "phy_busy"),
+	WMAP(PHY_RX, "phy_rx"),
+	WMAP(PHY_TX, "phy_tx"),
+};
+
+static struct wprobe_mapping map_perlink[] = {
+	WMAP(IEEE_TX_RATE, "tx_rate", .scale = 10.0f),
+	WMAP(IEEE_RX_RATE, "rx_rate", .scale = 10.0f),
+	WMAP(RSSI, "rssi"),
+	WMAP(SIGNAL, "signal"),
+	WMAP(RETRANSMIT_200, "retransmit_200"),
+	WMAP(RETRANSMIT_400, "retransmit_400"),
+	WMAP(RETRANSMIT_800, "retransmit_800"),
+	WMAP(RETRANSMIT_1600, "retransmit_1600"),
+};
+
+static unsigned char link_local[6];
+static char link_default[6];
+static LIST_HEAD(global_attr);
+static LIST_HEAD(link_attr);
+static LIST_HEAD(links);
+static int nfields = 0;
+
+#define FOKUS_USERID	12325
+
+static void
+match_template(struct wprobe_mapping *map, int n, struct list_head *list)
+{
+	struct wprobe_attribute *attr;
+	int i, j, last = -1;
+
+	list_for_each_entry(attr, list, list) {
+		for (i = 0; i < n; i++) {
+			j = (last + 1 + i) % n;
+			if (!strcmp(attr->name, map[j].wprobe_id))
+				goto found;
+		}
+		continue;
+found:
+		last = j;
+		map[j].val = &attr->val;
+		memset(&attr->val, 0, sizeof(attr->val));
+		nfields++;
+	}
+}
+
+/* name: export_ipfix_get_template()
+ */
+static ipfix_template_t *
+prepare_template(ipfix_t *handle)
+{
+    ipfix_template_t *t = NULL;
+	int size = 3 * nfields + WPROBE_OFFSET;
+    int i;
+
+    if (ipfix_new_data_template( handle, &t, size) < 0) {
+        mlogf( 0, "ipfix_new_template() failed: %s\n", strerror(errno) ); 
+		exit(1);
+    }
+
+	ipfix_add_field(handle, t, 0, IPFIX_FT_SOURCEMACADDRESS, 6);
+	ipfix_add_field(handle, t, 0, IPFIX_FT_DESTINATIONMACADDRESS, 6);
+
+	g_data.lens = calloc(size, sizeof(g_data.lens[0]));
+	g_data.lens[0] = 6;
+	g_data.lens[1] = 6;
+	for (i = WPROBE_OFFSET; i < size; i++)
+		g_data.lens[i] = 4;
+
+	g_data.addrs = calloc(size, sizeof(g_data.addrs[0]));
+	g_data.addrs[0] = link_local;
+	g_data.maxfields = WPROBE_OFFSET;
+	return t;
+}
+
+static void
+add_template_fields(ipfix_t *handle, ipfix_template_t *t, struct wprobe_mapping *map, int n)
+{
+	int f = g_data.maxfields;
+	int i;
+
+    for (i = 0; i < n; i++) {
+		if (!map[i].val)
+			continue;
+
+		g_data.addrs[f++] = &map[i].val->avg;
+		g_data.addrs[f++] = &map[i].val->stdev;
+		g_data.addrs[f++] = &map[i].val->n;
+
+        if (ipfix_add_field( handle, t, FOKUS_USERID, map[i].id + 0, 4) < 0)
+            exit(1);
+        if (ipfix_add_field( handle, t, FOKUS_USERID, map[i].id + 1, 4) < 0)
+            exit(1);
+        if (ipfix_add_field( handle, t, FOKUS_USERID, map[i].id + 2, 4) < 0)
+            exit(1);
+    }
+	g_data.maxfields = f;
+}
+
+static void
+wprobe_dump_data(ipfix_t *ipfixh, ipfix_template_t *ipfixt, const char *ifname, struct list_head *gl, struct list_head *ll, struct list_head *ls)
+{
+	struct wprobe_link *link;
+
+	wprobe_update_links(ifname, ls);
+	wprobe_request_data(ifname, gl, NULL, 2);
+	if (list_empty(ls)) {
+		g_data.addrs[1] = link_default;
+		ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
+		ipfix_export_flush(ipfixh);
+	}
+	list_for_each_entry(link, ls, list) {
+		g_data.addrs[1] = link->addr;
+		wprobe_request_data(ifname, ll, link->addr, 2);
+		ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
+		ipfix_export_flush(ipfixh);
+	}
+}
+
+int main ( int argc, char **argv )
+{
+    ipfix_template_t  *ipfixt = NULL;
+    ipfix_t *ipfixh = NULL;
+    int protocol = IPFIX_PROTO_TCP;
+    char *chost = NULL;
+	char *ifname = NULL;
+    int sourceid = 12345;
+    int port = IPFIX_PORTNO;
+    int verbose_level = 0;
+    int opt, i = 10;
+
+	while ((opt = getopt(argc, argv, "hi:c:p:vstu")) != EOF) {
+		switch (opt) {
+		case 'p':
+			if ((port=atoi(optarg)) <0) {
+				fprintf( stderr, "Invalid -p argument!\n" );
+				exit(1);
+			}
+			break;
+		case 'i':
+			ifname = optarg;
+			break;
+		case 'c':
+			chost = optarg;
+			break;
+
+		case 's':
+			protocol = IPFIX_PROTO_SCTP;
+			break;
+
+		case 't':
+			protocol = IPFIX_PROTO_TCP;
+			break;
+
+		case 'u':
+			protocol = IPFIX_PROTO_UDP;
+			break;
+
+		case 'v':
+			verbose_level ++;
+			break;
+
+		case 'h':
+		default:
+			fprintf(stderr, "usage: %s [-hstuv] -i <interface> -c <collector> [-p portno]\n"
+					 "  -h               this help\n"
+					 "  -i <interface>   wprobe interface\n"
+					 "  -c <collector>   collector address\n"
+					 "  -p <portno>      collector port number (default=%d)\n"
+					 "  -s               send data via SCTP\n"
+					 "  -t               send data via TCP (default)\n"
+					 "  -u               send data via UDP\n"
+					 "  -v               increase verbose level\n\n",
+					 argv[0], IPFIX_PORTNO  );
+			exit(1);
+		}
+	}
+
+	if (!ifname) {
+		fprintf(stderr, "No interface specified\n");
+		return -1;
+	}
+
+	if (!chost) {
+		fprintf(stderr, "No collector specified\n");
+		return -1;
+	}
+
+	if (wprobe_init() != 0) {
+		fprintf(stderr, "wprobe init failed\n");
+		return -1;
+	}
+
+	wprobe_dump_attributes(ifname, false, &global_attr, (char *) link_local);
+	wprobe_dump_attributes(ifname, true, &link_attr, NULL);
+	if (list_empty(&global_attr) && list_empty(&link_attr)) {
+		fprintf(stderr, "Cannot connect to wprobe on interface '%s'\n", ifname);
+		return -1;
+	}
+
+	match_template(map_globals, ARRAY_SIZE(map_globals), &global_attr);
+	match_template(map_perlink, ARRAY_SIZE(map_perlink), &link_attr);
+	if (nfields == 0) {
+		fprintf(stderr, "No usable attributes found\n");
+		return -1;
+	}
+
+    mlog_set_vlevel( verbose_level );
+    if (ipfix_init() < 0) {
+        fprintf( stderr, "cannot init ipfix module: %s\n", strerror(errno) );
+        exit(1);
+    }
+
+    ipfix_add_vendor_information_elements(ipfix_ft_fokus);
+    if (ipfix_open(&ipfixh, sourceid, IPFIX_VERSION) < 0) {
+        fprintf( stderr, "ipfix_open() failed: %s\n", strerror(errno) );
+        exit(1);
+    }
+
+    if (ipfix_add_collector( ipfixh, chost, port, protocol ) < 0) {
+        fprintf( stderr, "ipfix_add_collector(%s,%d) failed: %s\n", 
+                 chost, port, strerror(errno));
+        exit(1);
+    }
+
+	fprintf(stderr, "Local link address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+		link_local[0], link_local[1], link_local[2],
+		link_local[3], link_local[4], link_local[5]);
+
+	ipfixt = prepare_template(ipfixh);
+	add_template_fields(ipfixh, ipfixt, map_globals, ARRAY_SIZE(map_globals));
+	add_template_fields(ipfixh, ipfixt, map_perlink, ARRAY_SIZE(map_perlink));
+
+	while (!do_close) {
+		usleep(100 * 1000);
+		wprobe_measure(ifname);
+
+		if (i-- > 0)
+			continue;
+
+		i = 10;
+		wprobe_dump_data(ipfixh, ipfixt, ifname, &global_attr, &link_attr, &links);
+    }
+
+    ipfix_delete_template( ipfixh, ipfixt );
+    ipfix_close( ipfixh );
+    ipfix_cleanup();
+    exit(0);
+}
diff --git a/package/wprobe/src/exporter/wprobe-export.h b/package/wprobe/src/exporter/wprobe-export.h
new file mode 100644
index 000000000..89da9e86e
--- /dev/null
+++ b/package/wprobe/src/exporter/wprobe-export.h
@@ -0,0 +1,34 @@
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+/**
+ * struct wprobe_value: data structure for attribute values
+ * see kernel api netlink attributes for more information
+ */
+struct wprobe_value {
+	/* attribute value */
+	union data {
+		const char *STRING;
+		uint8_t U8;
+		uint16_t U16;
+		uint32_t U32;
+		uint64_t U64;
+		int8_t S8;
+		int16_t S16;
+		int32_t S32;
+		int64_t S64;
+	} data;
+	/* statistics */
+	int64_t s, ss;
+	double avg, stdev;
+	unsigned int n;
+	void *usedata;  /* Pointer to used data.something */
+};
+
+struct exporter_data {
+	int id; /* ipfix id */
+        int userid; /* focus or global */
+	int size; /* size in byte*/
+	struct wprobe_value val;
+};
diff --git a/package/wprobe/src/kernel/Makefile b/package/wprobe/src/kernel/Makefile
new file mode 100644
index 000000000..2a9875311
--- /dev/null
+++ b/package/wprobe/src/kernel/Makefile
@@ -0,0 +1,5 @@
+EXTRA_CFLAGS += -I.
+
+obj-m := wprobe.o wprobe-dummy.o
+
+wprobe-objs := wprobe-core.o
diff --git a/package/wprobe/src/kernel/linux/wprobe.h b/package/wprobe/src/kernel/linux/wprobe.h
new file mode 100644
index 000000000..f145195cd
--- /dev/null
+++ b/package/wprobe/src/kernel/linux/wprobe.h
@@ -0,0 +1,298 @@
+/*
+ * wprobe.h: API for the wireless probe interface
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef __WPROBE_H
+#define __WPROBE_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/if_ether.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <net/genetlink.h>
+#endif
+
+/** 
+ * enum wprobe_attr: netlink attribute list
+ *
+ * @WPROBE_ATTR_UNSPEC: unused
+ *
+ * @WPROBE_ATTR_INTERFACE: interface name to process query on (NLA_STRING)
+ * @WPROBE_ATTR_MAC: mac address (used for wireless links) (NLA_STRING)
+ * @WPROBE_ATTR_FLAGS: interface/link/attribute flags (see enum wprobe_flags) (NLA_U32)
+ * @WPROBE_ATTR_DURATION: sampling duration (in milliseconds) (NLA_MSECS)
+ *
+ * @WPROBE_ATTR_ID: attribute id (NLA_U32)
+ * @WPROBE_ATTR_NAME: attribute name (NLA_STRING)
+ * @WPROBE_ATTR_TYPE: attribute type (NLA_U8)
+ * @WPROBE_ATTR_SCALE: attribute scale factor (NLA_U32)
+ *
+ * attribute values:
+ *
+ * @WPROBE_VAL_STRING: string value (NLA_STRING)
+ * @WPROBE_VAL_S8: signed 8-bit integer (NLA_U8)
+ * @WPROBE_VAL_S16: signed 16-bit integer (NLA_U16)
+ * @WPROBE_VAL_S32: signed 32-bit integer (NLA_U32)
+ * @WPROBE_VAL_S64: signed 64-bit integer (NLA_U64)
+ * @WPROBE_VAL_U8: unsigned 8-bit integer (NLA_U8)
+ * @WPROBE_VAL_U16: unsigned 16-bit integer (NLA_U16)
+ * @WPROBE_VAL_U32: unsigned 32-bit integer (NLA_U32)
+ * @WPROBE_VAL_U64: unsigned 64-bit integer (NLA_U64)
+ *
+ * statistics:
+ * @WPROBE_VAL_SUM: sum of all samples
+ * @WPROBE_VAL_SUM_SQ: sum of all samples^2
+ * @WPROBE_VAL_SAMPLES: number of samples
+ *
+ * @WPROBE_ATTR_LAST: unused
+ */
+enum wprobe_attr {
+	WPROBE_ATTR_UNSPEC,
+	WPROBE_ATTR_INTERFACE,
+	WPROBE_ATTR_MAC,
+	WPROBE_ATTR_FLAGS,
+	WPROBE_ATTR_DURATION,
+	WPROBE_ATTR_SCALE,
+	/* end of query attributes */
+
+	/* response data */
+	WPROBE_ATTR_ID,
+	WPROBE_ATTR_NAME,
+	WPROBE_ATTR_TYPE,
+
+	/* value type attributes */
+	WPROBE_VAL_STRING,
+	WPROBE_VAL_S8,
+	WPROBE_VAL_S16,
+	WPROBE_VAL_S32,
+	WPROBE_VAL_S64,
+	WPROBE_VAL_U8,
+	WPROBE_VAL_U16,
+	WPROBE_VAL_U32,
+	WPROBE_VAL_U64,
+
+	/* aggregates for statistics */
+	WPROBE_VAL_SUM,
+	WPROBE_VAL_SUM_SQ,
+	WPROBE_VAL_SAMPLES,
+
+	WPROBE_ATTR_LAST
+};
+
+
+/**
+ * enum wprobe_cmd: netlink commands for interacting with wprobe
+ *
+ * @WPROBE_CMD_UNSPEC: unused
+ *
+ * @WPROBE_CMD_GET_LIST: get global/link property list
+ * @WPROBE_CMD_GET_INFO: get global/link properties
+ * @WPROBE_CMD_SET_FLAGS: set global/link flags
+ * @WPROBE_CMD_MEASURE: take a snapshot of the current data
+ * @WPROBE_CMD_GET_LINKS: get a list of links
+ *
+ * @WPROBE_CMD_LAST: unused
+ * 
+ * options for GET_INFO and SET_FLAGS:
+ *   - mac address set: per-link
+ *   - mac address unset: globalsa
+ */
+enum wprobe_cmd {
+	WPROBE_CMD_UNSPEC,
+	WPROBE_CMD_GET_LIST,
+	WPROBE_CMD_GET_INFO,
+	WPROBE_CMD_SET_FLAGS,
+	WPROBE_CMD_MEASURE,
+	WPROBE_CMD_GET_LINKS,
+	WPROBE_CMD_LAST
+};
+
+/**
+ * enum wprobe_flags: flags for wprobe links and items
+ * @WPROBE_F_KEEPSTAT: keep statistics for this link/device
+ * @WPROBE_F_RESET: reset statistics now (used only in WPROBE_CMD_SET_LINK)
+ * @WPROBE_F_NEWDATA: used to indicate that a value has been updated
+ */
+enum wprobe_flags {
+	WPROBE_F_KEEPSTAT = (1 << 0),
+	WPROBE_F_RESET = (1 << 1),
+	WPROBE_F_NEWDATA = (1 << 2),
+};
+
+#ifdef __KERNEL__
+
+struct wprobe_link;
+struct wprobe_item;
+struct wprobe_source;
+
+/**
+ * struct wprobe_link - data structure describing a wireless link
+ * @iface: pointer to the wprobe_iface that this link belongs to
+ * @addr: BSSID of the remote link partner
+ * @flags: link flags (see wprobe_flags)
+ * @priv: user pointer
+ *
+ * @list: for internal use
+ * @val: for internal use
+ */
+struct wprobe_link {
+	struct list_head list;
+	struct wprobe_iface *iface;
+	char addr[ETH_ALEN];
+	u32 flags;
+	void *priv;
+	void *val;
+};
+
+/** 
+ * struct wprobe_item - data structure describing the format of wprobe_link::data or wprobe_iface::data
+ * @name: name of the field
+ * @type: data type of this field
+ * @flags: measurement item flags (see wprobe_flags)
+ */
+struct wprobe_item {
+	const char *name;
+	enum wprobe_attr type;
+	u32 flags;
+};
+
+struct wprobe_value {
+	bool pending;
+	union {
+		/*
+		 * the following are kept uppercase to allow
+		 * for automated checking against WPROBE_VAL_*
+		 * via BUG_ON()
+		 */
+		const char *STRING;
+		u8 U8;
+		u16 U16;
+		u32 U32;
+		u64 U64;
+		s8 S8;
+		s16 S16;
+		s32 S32;
+		s64 S64;
+	};
+	s64 s, ss;
+	unsigned int n;
+
+	/* timestamps */
+	u64 first, last;
+};
+
+/**
+ * struct wprobe_source - data structure describing a wireless interface
+ *
+ * @name: name of the interface
+ * @addr: local mac address of the interface
+ * @links: list of wireless links to poll
+ * @link_items: description of the per-link data structure
+ * @n_link_items: number of link description items
+ * @global_items: description of the per-interface data structure
+ * @n_global_items: number of per-interface description items
+ * @sync_data: callback allowing the driver to prepare data for the wprobe poll
+ *
+ * @list: head for the list of interfaces
+ * @priv: user pointer
+ * @lock: spinlock protecting value data access
+ * @val: internal use
+ * @query_val: internal use
+ *
+ * if sync_data is NULL, wprobe assumes that it can access the data structure
+ * at any time (in atomic context). if sync_data returns a negative error code,
+ * the poll request will not be handled for the given link
+ */
+struct wprobe_iface {
+	/* to be filled in by wprobe source drivers */
+	const char *name;
+	const char *addr;
+	const struct wprobe_item *link_items;
+	int n_link_items;
+	const struct wprobe_item *global_items;
+	int n_global_items;
+
+	int (*sync_data)(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure);
+	void *priv;
+
+	/* handled by the wprobe core */
+	struct list_head list;
+	struct list_head links;
+	spinlock_t lock;
+	void *val;
+	void *query_val;
+};
+
+#define WPROBE_FILL_BEGIN(_ptr, _list) do {			\
+	struct wprobe_value *__val = (_ptr);			\
+	const struct wprobe_item *__item = _list;		\
+	u64 __msecs = jiffies_to_msecs(jiffies)
+
+#define WPROBE_SET(_idx, _type, _value)				\
+	if (__item[_idx].type != WPROBE_VAL_##_type) {		\
+		printk("ERROR: invalid data type at %s:%d\n", __FILE__, __LINE__); \
+		break;						\
+	}							\
+	__val[_idx].pending = true;				\
+	__val[_idx]._type = _value;				\
+	if (!__val[_idx].first)					\
+		__val[_idx].first = __msecs;			\
+	__val[_idx].first = __msecs
+
+#define WPROBE_FILL_END()					\
+} while(0)
+
+/**
+ * wprobe_add_iface: register an interface with the wireless probe subsystem
+ * @dev: wprobe_iface structure describing the interface
+ */
+extern int __weak wprobe_add_iface(struct wprobe_iface *dev);
+
+/**
+ * wprobe_remove_iface: deregister an interface from the wireless probe subsystem
+ * @dev: wprobe_iface structure describing the interface
+ */
+extern void __weak wprobe_remove_iface(struct wprobe_iface *dev);
+
+/**
+ * wprobe_add_link: register a new wireless link
+ * @dev: wprobe_iface structure describing the interface
+ * @l: storage space for the wprobe_link structure
+ * @addr: mac address of the new link
+ *
+ * the entire wprobe_link structure is overwritten by this function call
+ */
+extern int __weak wprobe_add_link(struct wprobe_iface *dev, struct wprobe_link *l, const char *addr);
+
+/**
+ * wprobe_remove_link: deregister a previously registered wireless link
+ * @dev: wprobe_iface structure describing the interface
+ * @l: wprobe_link data structure
+ */
+extern void __weak wprobe_remove_link(struct wprobe_iface *dev, struct wprobe_link *l);
+
+/**
+ * wprobe_update_stats: update statistics after sampling values
+ * @dev: wprobe_iface structure describing the interface
+ * @l: wprobe_link data structure
+ *
+ * if l == NULL, then the stats for globals are updated
+ */
+extern void __weak wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
+
+#endif /* __KERNEL__ */
+
+#endif
diff --git a/package/wprobe/src/kernel/wprobe-core.c b/package/wprobe/src/kernel/wprobe-core.c
new file mode 100644
index 000000000..03e904946
--- /dev/null
+++ b/package/wprobe/src/kernel/wprobe-core.c
@@ -0,0 +1,669 @@
+/*
+ * wprobe-core.c: Wireless probe interface core
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
+#include <linux/rculist.h>
+#else
+#include <linux/list.h>
+#endif
+#include <linux/skbuff.h>
+#include <linux/wprobe.h>
+#include <linux/math64.h>
+
+#define static
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+#define list_for_each_rcu __list_for_each_rcu
+#endif
+
+static struct list_head wprobe_if;
+static spinlock_t wprobe_lock;
+
+static struct genl_family wprobe_fam = {
+	.id = GENL_ID_GENERATE,
+	.name = "wprobe",
+	.hdrsize = 0,
+	.version = 1,
+	/* only the first set of attributes is used for queries */
+	.maxattr = WPROBE_ATTR_ID,
+};
+
+static void wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
+
+int
+wprobe_add_link(struct wprobe_iface *s, struct wprobe_link *l, const char *addr)
+{
+	unsigned long flags;
+
+	INIT_LIST_HEAD(&l->list);
+	l->val = kzalloc(sizeof(struct wprobe_value) * s->n_link_items, GFP_ATOMIC);
+	if (!l->val)
+		return -ENOMEM;
+
+	l->iface = s;
+	memcpy(&l->addr, addr, ETH_ALEN);
+	spin_lock_irqsave(&wprobe_lock, flags);
+	list_add_tail_rcu(&l->list, &s->links);
+	spin_unlock_irqrestore(&wprobe_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(wprobe_add_link);
+
+void
+wprobe_remove_link(struct wprobe_iface *s, struct wprobe_link *l)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&wprobe_lock, flags);
+	list_del_rcu(&l->list);
+	spin_unlock_irqrestore(&wprobe_lock, flags);
+	synchronize_rcu();
+	kfree(l->val);
+}
+EXPORT_SYMBOL(wprobe_remove_link);
+
+int
+wprobe_add_iface(struct wprobe_iface *s)
+{
+	unsigned long flags;
+	int vsize;
+
+	/* reset only wprobe private area */
+	memset(&s->list, 0, sizeof(struct wprobe_iface) - offsetof(struct wprobe_iface, list));
+
+	BUG_ON(!s->name);
+	INIT_LIST_HEAD(&s->list);
+	INIT_LIST_HEAD(&s->links);
+
+	vsize = max(s->n_link_items, s->n_global_items);
+	s->val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
+	if (!s->val)
+		goto error;
+
+	s->query_val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
+	if (!s->query_val)
+		goto error;
+
+	spin_lock_irqsave(&wprobe_lock, flags);
+	list_add_rcu(&s->list, &wprobe_if);
+	spin_unlock_irqrestore(&wprobe_lock, flags);
+
+	return 0;
+
+error:
+	if (s->val)
+		kfree(s->val);
+	return -ENOMEM;
+}
+EXPORT_SYMBOL(wprobe_add_iface);
+
+void
+wprobe_remove_iface(struct wprobe_iface *s)
+{
+	unsigned long flags;
+
+	BUG_ON(!list_empty(&s->links));
+
+	spin_lock_irqsave(&wprobe_lock, flags);
+	list_del_rcu(&s->list);
+	spin_unlock_irqrestore(&wprobe_lock, flags);
+
+	/* wait for all queries to finish before freeing the
+	 * temporary value storage buffer */
+	synchronize_rcu();
+
+	kfree(s->val);
+	kfree(s->query_val);
+}
+EXPORT_SYMBOL(wprobe_remove_iface);
+
+static struct wprobe_iface *
+wprobe_get_dev(struct nlattr *attr)
+{
+	struct wprobe_iface *dev = NULL;
+	struct wprobe_iface *p;
+	const char *name;
+	int i = 0;
+
+	if (!attr)
+		return NULL;
+
+	name = nla_data(attr);
+	list_for_each_entry_rcu(p, &wprobe_if, list) {
+		i++;
+		if (strcmp(name, p->name) != 0)
+			continue;
+
+		dev = p;
+		break;
+	}
+
+	return dev;
+}
+
+int
+wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query)
+{
+	struct wprobe_value *val;
+	unsigned long flags;
+	int n, err;
+
+	if (l) {
+		n = dev->n_link_items;
+		val = l->val;
+	} else {
+		n = dev->n_global_items;
+		val = dev->val;
+	}
+
+	spin_lock_irqsave(&dev->lock, flags);
+	err = dev->sync_data(dev, l, val, !query);
+	if (err)
+		goto done;
+
+	if (query)
+		memcpy(dev->query_val, val, sizeof(struct wprobe_value) * n);
+
+	wprobe_update_stats(dev, l);
+done:
+	spin_unlock_irqrestore(&dev->lock, flags);
+	return 0;
+}
+EXPORT_SYMBOL(wprobe_sync_data);
+
+void
+wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l)
+{
+	const struct wprobe_item *item;
+	struct wprobe_value *val;
+	int i, n;
+
+	if (l) {
+		n = dev->n_link_items;
+		item = dev->link_items;
+		val = l->val;
+	} else {
+		n = dev->n_global_items;
+		item = dev->global_items;
+		val = dev->val;
+	}
+
+	/* process statistics */
+	for (i = 0; i < n; i++) {
+		s64 v;
+
+		if (!val[i].pending)
+			continue;
+
+		val[i].n++;
+
+		switch(item[i].type) {
+		case WPROBE_VAL_S8:
+			v = val[i].S8;
+			break;
+		case WPROBE_VAL_S16:
+			v = val[i].S16;
+			break;
+		case WPROBE_VAL_S32:
+			v = val[i].S32;
+			break;
+		case WPROBE_VAL_S64:
+			v = val[i].S64;
+			break;
+		case WPROBE_VAL_U8:
+			v = val[i].U8;
+			break;
+		case WPROBE_VAL_U16:
+			v = val[i].U16;
+			break;
+		case WPROBE_VAL_U32:
+			v = val[i].U32;
+			break;
+		case WPROBE_VAL_U64:
+			v = val[i].U64;
+			break;
+		default:
+			continue;
+		}
+
+		val[i].s += v;
+		val[i].ss += v * v;
+		val[i].pending = false;
+	}
+}
+EXPORT_SYMBOL(wprobe_update_stats);
+
+static const struct nla_policy wprobe_policy[WPROBE_ATTR_ID+1] = {
+	[WPROBE_ATTR_INTERFACE] = { .type = NLA_NUL_STRING },
+	[WPROBE_ATTR_MAC] = { .type = NLA_STRING },
+	[WPROBE_ATTR_DURATION] = { .type = NLA_MSECS },
+	[WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
+	[WPROBE_ATTR_SCALE] = { .type = NLA_U32 },
+};
+
+static bool
+wprobe_check_ptr(struct list_head *list, struct list_head *ptr)
+{
+	struct list_head *p;
+
+	list_for_each_rcu(p, list) {
+		if (ptr == p)
+			return true;
+	}
+	return false;
+}
+
+static bool
+wprobe_send_item_value(struct sk_buff *msg, struct netlink_callback *cb,
+                       struct wprobe_iface *dev, struct wprobe_link *l,
+                       const struct wprobe_item *item,
+                       int i, u32 flags)
+{
+	struct genlmsghdr *hdr;
+	struct wprobe_value *val = dev->query_val;
+	u64 time = val[i].last - val[i].first;
+
+	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			&wprobe_fam, NLM_F_MULTI, WPROBE_CMD_GET_INFO);
+
+	NLA_PUT_U32(msg, WPROBE_ATTR_ID, i);
+	NLA_PUT_U32(msg, WPROBE_ATTR_FLAGS, flags);
+	NLA_PUT_U8(msg, WPROBE_ATTR_TYPE, item[i].type);
+	NLA_PUT_U64(msg, WPROBE_ATTR_DURATION, time);
+
+	switch(item[i].type) {
+	case WPROBE_VAL_S8:
+	case WPROBE_VAL_U8:
+		NLA_PUT_U8(msg, item[i].type, val[i].U8);
+		break;
+	case WPROBE_VAL_S16:
+	case WPROBE_VAL_U16:
+		NLA_PUT_U16(msg, item[i].type, val[i].U16);
+		break;
+	case WPROBE_VAL_S32:
+	case WPROBE_VAL_U32:
+		NLA_PUT_U32(msg, item[i].type, val[i].U32);
+		break;
+	case WPROBE_VAL_S64:
+	case WPROBE_VAL_U64:
+		NLA_PUT_U64(msg, item[i].type, val[i].U64);
+		break;
+	case WPROBE_VAL_STRING:
+		if (val[i].STRING)
+			NLA_PUT_STRING(msg, item[i].type, val[i].STRING);
+		else
+			NLA_PUT_STRING(msg, item[i].type, "");
+		/* bypass avg/stdev */
+		goto done;
+	default:
+		/* skip unknown values */
+		goto done;
+	}
+	if (item[i].flags & WPROBE_F_KEEPSTAT) {
+		NLA_PUT_U64(msg, WPROBE_VAL_SUM, val[i].s);
+		NLA_PUT_U64(msg, WPROBE_VAL_SUM_SQ, val[i].ss);
+		NLA_PUT_U32(msg, WPROBE_VAL_SAMPLES, (u32) val[i].n);
+	}
+done:
+	genlmsg_end(msg, hdr);
+	return true;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return false;
+}
+
+static bool
+wprobe_send_item_info(struct sk_buff *msg, struct netlink_callback *cb,
+                       struct wprobe_iface *dev,
+                       const struct wprobe_item *item, int i)
+{
+	struct genlmsghdr *hdr;
+
+	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			&wprobe_fam, NLM_F_MULTI, WPROBE_CMD_GET_LIST);
+
+	if ((i == 0) && (dev->addr != NULL))
+		NLA_PUT(msg, WPROBE_ATTR_MAC, 6, dev->addr);
+	NLA_PUT_U32(msg, WPROBE_ATTR_ID, (u32) i);
+	NLA_PUT_STRING(msg, WPROBE_ATTR_NAME, item[i].name);
+	NLA_PUT_U8(msg, WPROBE_ATTR_TYPE, item[i].type);
+	NLA_PUT_U32(msg, WPROBE_ATTR_FLAGS, item[i].flags);
+	genlmsg_end(msg, hdr);
+	return true;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return false;
+}
+
+
+static struct wprobe_link *
+wprobe_find_link(struct wprobe_iface *dev, const char *mac)
+{
+	struct wprobe_link *l;
+
+	list_for_each_entry_rcu(l, &dev->links, list) {
+		if (!memcmp(l->addr, mac, 6))
+			return l;
+	}
+	return NULL;
+}
+
+static bool
+wprobe_dump_link(struct sk_buff *msg, struct wprobe_link *l, struct netlink_callback *cb)
+{
+	struct genlmsghdr *hdr;
+
+	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			&wprobe_fam, NLM_F_MULTI, WPROBE_CMD_GET_LINKS);
+	if (!hdr)
+		return false;
+
+	NLA_PUT(msg, WPROBE_ATTR_MAC, 6, l->addr);
+	genlmsg_end(msg, hdr);
+	return true;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return false;
+}
+
+static int
+wprobe_dump_links(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct wprobe_iface *dev = (struct wprobe_iface *)cb->args[0];
+	struct wprobe_link *l;
+	int err = 0;
+	int i = 0;
+
+	if (!dev) {
+		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + wprobe_fam.hdrsize,
+				wprobe_fam.attrbuf, wprobe_fam.maxattr, wprobe_policy);
+		if (err)
+			goto done;
+
+		dev = wprobe_get_dev(wprobe_fam.attrbuf[WPROBE_ATTR_INTERFACE]);
+		if (!dev) {
+			err = -ENODEV;
+			goto done;
+		}
+
+		cb->args[0] = (long) dev;
+	} else {
+		if (!wprobe_check_ptr(&wprobe_if, &dev->list)) {
+			err = -ENODEV;
+			goto done;
+		}
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(l, &dev->links, list) {
+		if (i < cb->args[1])
+			continue;
+
+		if (unlikely(!wprobe_dump_link(skb, l, cb)))
+			break;
+
+		i++;
+	}
+	cb->args[1] = i;
+	rcu_read_unlock();
+	err = skb->len;
+done:
+	return err;
+}
+static void
+wprobe_scale_stats(const struct wprobe_item *item, struct wprobe_value *val, int n, u32 flags)
+{
+	u32 scale = 0;
+	int i;
+
+	for (i = 0; i < n; i++) {
+		if (!(item[i].flags & WPROBE_F_KEEPSTAT))
+			continue;
+
+		/* reset statistics, if requested */
+		if (flags & WPROBE_F_RESET)
+			scale = val[i].n;
+		else if (wprobe_fam.attrbuf[WPROBE_ATTR_SCALE])
+			scale = nla_get_u32(wprobe_fam.attrbuf[WPROBE_ATTR_SCALE]);
+
+		if ((scale > 0) && (val[i].n >= scale)) {
+			val[i].s = div_s64(val[i].s, scale);
+			val[i].ss = div_s64(val[i].ss, scale);
+			val[i].n /= scale;
+		}
+	}
+}
+
+#define WPROBE_F_LINK (1 << 31) /* for internal use */
+static int
+wprobe_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct wprobe_iface *dev = (struct wprobe_iface *)cb->args[0];
+	struct wprobe_link *l = (struct wprobe_link *)cb->args[1];
+	struct wprobe_value *val;
+	const struct wprobe_item *item;
+	struct genlmsghdr *hdr;
+	unsigned long flags;
+	int cmd, n, i = cb->args[3];
+	u32	vflags = cb->args[2];
+	int err = 0;
+
+	hdr = (struct genlmsghdr *)nlmsg_data(cb->nlh);
+	cmd = hdr->cmd;
+
+	/* since the attribute value list might be too big for a single netlink
+	 * message, the device, link and offset get stored in the netlink callback.
+	 * if this is the first request, we need to do the full lookup for the device.
+	 *
+	 * access to the device and link structure is synchronized through rcu.
+	 */
+	rcu_read_lock();
+	if (!dev) {
+		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + wprobe_fam.hdrsize,
+				wprobe_fam.attrbuf, wprobe_fam.maxattr, wprobe_policy);
+		if (err)
+			goto done;
+
+		err = -ENOENT;
+		dev = wprobe_get_dev(wprobe_fam.attrbuf[WPROBE_ATTR_INTERFACE]);
+		if (!dev)
+			goto done;
+
+		if (cmd == WPROBE_CMD_GET_INFO) {
+			if (wprobe_fam.attrbuf[WPROBE_ATTR_MAC]) {
+				l = wprobe_find_link(dev, nla_data(wprobe_fam.attrbuf[WPROBE_ATTR_MAC]));
+				if (!l)
+					goto done;
+
+				vflags = l->flags;
+			}
+
+			if (l) {
+				item = dev->link_items;
+				n = dev->n_link_items;
+				val = l->val;
+			} else {
+				item = dev->global_items;
+				n = dev->n_global_items;
+				val = dev->val;
+			}
+
+			/* sync data and move to temp storage for the query */
+			spin_lock_irqsave(&dev->lock, flags);
+			err = wprobe_sync_data(dev, l, true);
+			if (!err)
+				memcpy(dev->query_val, val, n * sizeof(struct wprobe_value));
+			wprobe_scale_stats(item, val, n, flags);
+			spin_unlock_irqrestore(&dev->lock, flags);
+
+			if (err)
+				goto done;
+		}
+
+		if (wprobe_fam.attrbuf[WPROBE_ATTR_FLAGS])
+			vflags |= nla_get_u32(wprobe_fam.attrbuf[WPROBE_ATTR_FLAGS]);
+
+		if (wprobe_fam.attrbuf[WPROBE_ATTR_MAC])
+			vflags |= WPROBE_F_LINK;
+
+		cb->args[0] = (long) dev;
+		cb->args[1] = (long) l;
+		cb->args[2] = vflags;
+		cb->args[3] = 0;
+	} else {
+		/* when pulling pointers from the callback, validate them
+		 * against the list using rcu to make sure that we won't
+		 * dereference pointers to free'd memory after the last
+		 * grace period */
+		err = -ENOENT;
+		if (!wprobe_check_ptr(&wprobe_if, &dev->list))
+			goto done;
+
+		if (l && !wprobe_check_ptr(&dev->links, &l->list))
+			goto done;
+	}
+
+	if (vflags & WPROBE_F_LINK) {
+		item = dev->link_items;
+		n = dev->n_link_items;
+	} else {
+		item = dev->global_items;
+		n = dev->n_global_items;
+	}
+
+	err = 0;
+	switch(cmd) {
+	case WPROBE_CMD_GET_INFO:
+		while (i < n) {
+			if (!wprobe_send_item_value(skb, cb, dev, l, item, i, vflags))
+				break;
+			i++;
+		}
+		break;
+	case WPROBE_CMD_GET_LIST:
+		while (i < n) {
+			if (!wprobe_send_item_info(skb, cb, dev, item, i))
+				break;
+			i++;
+		}
+		break;
+	default:
+		err = -EINVAL;
+		goto done;
+	}
+	cb->args[3] = i;
+	err = skb->len;
+
+done:
+	rcu_read_unlock();
+	return err;
+}
+#undef WPROBE_F_LINK
+
+static int
+wprobe_measure(struct sk_buff *skb, struct genl_info *info)
+{
+	struct wprobe_iface *dev;
+	struct wprobe_link *l = NULL;
+	int err = -ENOENT;
+
+	rcu_read_lock();
+	dev = wprobe_get_dev(info->attrs[WPROBE_ATTR_INTERFACE]);
+	if (!dev)
+		goto done;
+
+	if (info->attrs[WPROBE_ATTR_MAC]) {
+		l = wprobe_find_link(dev, nla_data(wprobe_fam.attrbuf[WPROBE_ATTR_MAC]));
+		if (!l)
+			goto done;
+	}
+
+	err = wprobe_sync_data(dev, l, false);
+
+done:
+	rcu_read_unlock();
+	return err;
+}
+
+static struct genl_ops wprobe_ops[] = {
+	{
+		.cmd = WPROBE_CMD_GET_INFO,
+		.dumpit = wprobe_dump_info,
+		.policy = wprobe_policy,
+	},
+	{
+		.cmd = WPROBE_CMD_GET_LIST,
+		.dumpit = wprobe_dump_info,
+		.policy = wprobe_policy,
+	},
+	{
+		.cmd = WPROBE_CMD_MEASURE,
+		.doit = wprobe_measure,
+		.policy = wprobe_policy,
+	},
+	{
+		.cmd = WPROBE_CMD_GET_LINKS,
+		.dumpit = wprobe_dump_links,
+		.policy = wprobe_policy,
+	}
+};
+
+static void __exit
+wprobe_exit(void)
+{
+	BUG_ON(!list_empty(&wprobe_if));
+	genl_unregister_family(&wprobe_fam);
+}
+
+
+static int __init
+wprobe_init(void)
+{
+	int i, err;
+
+	spin_lock_init(&wprobe_lock);
+	INIT_LIST_HEAD(&wprobe_if);
+
+	err = genl_register_family(&wprobe_fam);
+	if (err)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(wprobe_ops); i++) {
+		err = genl_register_ops(&wprobe_fam, &wprobe_ops[i]);
+		if (err)
+			goto error;
+	}
+
+	return 0;
+
+error:
+	genl_unregister_family(&wprobe_fam);
+	return err;
+}
+
+module_init(wprobe_init);
+module_exit(wprobe_exit);
+MODULE_LICENSE("GPL");
+
diff --git a/package/wprobe/src/kernel/wprobe-dummy.c b/package/wprobe/src/kernel/wprobe-dummy.c
new file mode 100644
index 000000000..4231223e0
--- /dev/null
+++ b/package/wprobe/src/kernel/wprobe-dummy.c
@@ -0,0 +1,96 @@
+/*
+ * wprobe-core.c: Wireless probe interface dummy driver
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/random.h>
+#include <linux/wprobe.h>
+
+static const char local_addr[] = "\x00\x13\x37\xba\xbe\x00";
+
+enum dummy_global_values {
+	DUMMY_GLOBAL_MEDIUM_BUSY
+};
+enum dummy_link_values {
+	DUMMY_LINK_SNR
+};
+
+struct wprobe_item dummy_perlink[] = {
+	[DUMMY_LINK_SNR] = {
+		.name = "snr",
+		.type = WPROBE_VAL_U8,
+		.flags = WPROBE_F_KEEPSTAT,
+	},
+};
+
+struct wprobe_item dummy_globals[] = {
+	[DUMMY_GLOBAL_MEDIUM_BUSY] = {
+		.name = "medium_busy",
+		.type = WPROBE_VAL_U8,
+		.flags = WPROBE_F_KEEPSTAT,
+	}
+};
+
+int dummy_sync(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure)
+{
+	u8 intval = 0;
+
+	get_random_bytes(&intval, 1);
+	if (l) {
+		WPROBE_FILL_BEGIN(val, dummy_perlink);
+		WPROBE_SET(DUMMY_LINK_SNR, U8, (intval % 40));
+		WPROBE_FILL_END();
+	} else {
+		WPROBE_FILL_BEGIN(val, dummy_globals);
+		WPROBE_SET(DUMMY_GLOBAL_MEDIUM_BUSY, U8, (intval % 100));
+		WPROBE_FILL_END();
+	}
+	return 0;
+}
+
+static struct wprobe_iface dummy_dev = {
+	.name = "dummy",
+	.addr = local_addr,
+	.link_items = dummy_perlink,
+	.n_link_items = ARRAY_SIZE(dummy_perlink),
+	.global_items = dummy_globals,
+	.n_global_items = ARRAY_SIZE(dummy_globals),
+	.sync_data = dummy_sync,
+};
+
+static struct wprobe_link dummy_link;
+
+static int __init
+wprobe_dummy_init(void)
+{
+	wprobe_add_iface(&dummy_dev);
+	wprobe_add_link(&dummy_dev, &dummy_link, "\x00\x13\x37\xda\xda\x00");
+	return 0;
+}
+
+static void __exit
+wprobe_dummy_exit(void)
+{
+	wprobe_remove_link(&dummy_dev, &dummy_link);
+	wprobe_remove_iface(&dummy_dev);
+}
+
+module_init(wprobe_dummy_init);
+module_exit(wprobe_dummy_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/package/wprobe/src/user/Makefile b/package/wprobe/src/user/Makefile
new file mode 100644
index 000000000..e10dfc0d2
--- /dev/null
+++ b/package/wprobe/src/user/Makefile
@@ -0,0 +1,21 @@
+CFLAGS = -O2
+CPPFLAGS ?= -I../kernel
+WFLAGS = -Wall -Werror
+LDFLAGS =
+
+LIBNL = -lnl
+LIBM = -lm
+LIBS = $(LIBNL) $(LIBM)
+
+all: libwprobe.a wprobe-info
+
+libwprobe.a: wprobe.o
+	rm -f $@
+	$(AR) rcu $@ $^
+	$(RANLIB) $@
+
+%.o: %.c
+	$(CC) $(WFLAGS) -c -o $@ $(CPPFLAGS) $(CFLAGS) $<
+
+wprobe-info: wprobe-info.o wprobe.o
+	$(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
diff --git a/package/wprobe/src/user/list.h b/package/wprobe/src/user/list.h
new file mode 100644
index 000000000..2959a061d
--- /dev/null
+++ b/package/wprobe/src/user/list.h
@@ -0,0 +1,601 @@
+#ifndef _LINUX_LIST_H
+#define _LINUX_LIST_H
+
+#include <stddef.h>
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr:	the pointer to the member.
+ * @type:	the type of the container struct this is embedded in.
+ * @member:	the name of the member within the struct.
+ *
+ */
+#ifndef container_of
+#define container_of(ptr, type, member) (			\
+	(type *)( (char *)ptr - offsetof(type,member) ))
+#endif
+
+
+/*
+ * Simple doubly linked list implementation.
+ *
+ * Some of the internal functions ("__xxx") are useful when
+ * manipulating whole lists rather than single entries, as
+ * sometimes we already know the next/prev entries and we can
+ * generate better code by using them directly rather than
+ * using the generic single-entry routines.
+ */
+
+struct list_head {
+	struct list_head *next, *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+	struct list_head name = LIST_HEAD_INIT(name)
+
+static inline void INIT_LIST_HEAD(struct list_head *list)
+{
+	list->next = list;
+	list->prev = list;
+}
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_add(struct list_head *new,
+			      struct list_head *prev,
+			      struct list_head *next)
+{
+	next->prev = new;
+	new->next = next;
+	new->prev = prev;
+	prev->next = new;
+}
+
+/**
+ * list_add - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it after
+ *
+ * Insert a new entry after the specified head.
+ * This is good for implementing stacks.
+ */
+static inline void list_add(struct list_head *new, struct list_head *head)
+{
+	__list_add(new, head, head->next);
+}
+
+
+/**
+ * list_add_tail - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+static inline void list_add_tail(struct list_head *new, struct list_head *head)
+{
+	__list_add(new, head->prev, head);
+}
+
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head * prev, struct list_head * next)
+{
+	next->prev = prev;
+	prev->next = next;
+}
+
+/**
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty() on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	entry->next = NULL;
+	entry->prev = NULL;
+}
+
+/**
+ * list_replace - replace old entry by new one
+ * @old : the element to be replaced
+ * @new : the new element to insert
+ *
+ * If @old was empty, it will be overwritten.
+ */
+static inline void list_replace(struct list_head *old,
+				struct list_head *new)
+{
+	new->next = old->next;
+	new->next->prev = new;
+	new->prev = old->prev;
+	new->prev->next = new;
+}
+
+static inline void list_replace_init(struct list_head *old,
+					struct list_head *new)
+{
+	list_replace(old, new);
+	INIT_LIST_HEAD(old);
+}
+
+/**
+ * list_del_init - deletes entry from list and reinitialize it.
+ * @entry: the element to delete from the list.
+ */
+static inline void list_del_init(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	INIT_LIST_HEAD(entry);
+}
+
+/**
+ * list_move - delete from one list and add as another's head
+ * @list: the entry to move
+ * @head: the head that will precede our entry
+ */
+static inline void list_move(struct list_head *list, struct list_head *head)
+{
+	__list_del(list->prev, list->next);
+	list_add(list, head);
+}
+
+/**
+ * list_move_tail - delete from one list and add as another's tail
+ * @list: the entry to move
+ * @head: the head that will follow our entry
+ */
+static inline void list_move_tail(struct list_head *list,
+				  struct list_head *head)
+{
+	__list_del(list->prev, list->next);
+	list_add_tail(list, head);
+}
+
+/**
+ * list_is_last - tests whether @list is the last entry in list @head
+ * @list: the entry to test
+ * @head: the head of the list
+ */
+static inline int list_is_last(const struct list_head *list,
+				const struct list_head *head)
+{
+	return list->next == head;
+}
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+	return head->next == head;
+}
+
+/**
+ * list_empty_careful - tests whether a list is empty and not being modified
+ * @head: the list to test
+ *
+ * Description:
+ * tests whether a list is empty _and_ checks that no other CPU might be
+ * in the process of modifying either member (next or prev)
+ *
+ * NOTE: using list_empty_careful() without synchronization
+ * can only be safe if the only activity that can happen
+ * to the list entry is list_del_init(). Eg. it cannot be used
+ * if another CPU could re-list_add() it.
+ */
+static inline int list_empty_careful(const struct list_head *head)
+{
+	struct list_head *next = head->next;
+	return (next == head) && (next == head->prev);
+}
+
+static inline void __list_splice(struct list_head *list,
+				 struct list_head *head)
+{
+	struct list_head *first = list->next;
+	struct list_head *last = list->prev;
+	struct list_head *at = head->next;
+
+	first->prev = head;
+	head->next = first;
+
+	last->next = at;
+	at->prev = last;
+}
+
+/**
+ * list_splice - join two lists
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ */
+static inline void list_splice(struct list_head *list, struct list_head *head)
+{
+	if (!list_empty(list))
+		__list_splice(list, head);
+}
+
+/**
+ * list_splice_init - join two lists and reinitialise the emptied list.
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ *
+ * The list at @list is reinitialised
+ */
+static inline void list_splice_init(struct list_head *list,
+				    struct list_head *head)
+{
+	if (!list_empty(list)) {
+		__list_splice(list, head);
+		INIT_LIST_HEAD(list);
+	}
+}
+
+/**
+ * list_entry - get the struct for this entry
+ * @ptr:	the &struct list_head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_entry(ptr, type, member) \
+	container_of(ptr, type, member)
+
+/**
+ * list_first_entry - get the first element from a list
+ * @ptr:	the list head to take the element from.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Note, that list is expected to be not empty.
+ */
+#define list_first_entry(ptr, type, member) \
+	list_entry((ptr)->next, type, member)
+
+/**
+ * list_for_each	-	iterate over a list
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @head:	the head for your list.
+ */
+#define list_for_each(pos, head) \
+	for (pos = (head)->next; pos != (head); \
+        	pos = pos->next)
+
+/**
+ * __list_for_each	-	iterate over a list
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @head:	the head for your list.
+ *
+ * This variant differs from list_for_each() in that it's the
+ * simplest possible list iteration code, no prefetching is done.
+ * Use this for code that knows the list to be very short (empty
+ * or 1 entry) most of the time.
+ */
+#define __list_for_each(pos, head) \
+	for (pos = (head)->next; pos != (head); pos = pos->next)
+
+/**
+ * list_for_each_prev	-	iterate over a list backwards
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @head:	the head for your list.
+ */
+#define list_for_each_prev(pos, head) \
+	for (pos = (head)->prev; pos != (head); \
+        	pos = pos->prev)
+
+/**
+ * list_for_each_safe - iterate over a list safe against removal of list entry
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @n:		another &struct list_head to use as temporary storage
+ * @head:	the head for your list.
+ */
+#define list_for_each_safe(pos, n, head) \
+	for (pos = (head)->next, n = pos->next; pos != (head); \
+		pos = n, n = pos->next)
+
+/**
+ * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @n:		another &struct list_head to use as temporary storage
+ * @head:	the head for your list.
+ */
+#define list_for_each_prev_safe(pos, n, head) \
+	for (pos = (head)->prev, n = pos->prev; \
+	     pos != (head); \
+	     pos = n, n = pos->prev)
+
+/**
+ * list_for_each_entry	-	iterate over list of given type
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry(pos, head, member)				\
+	for (pos = list_entry((head)->next, typeof(*pos), member);	\
+	     &pos->member != (head); 	\
+	     pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_reverse - iterate backwards over list of given type.
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_reverse(pos, head, member)			\
+	for (pos = list_entry((head)->prev, typeof(*pos), member);	\
+	     &pos->member != (head); 	\
+	     pos = list_entry(pos->member.prev, typeof(*pos), member))
+
+/**
+ * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue()
+ * @pos:	the type * to use as a start point
+ * @head:	the head of the list
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Prepares a pos entry for use as a start point in list_for_each_entry_continue().
+ */
+#define list_prepare_entry(pos, head, member) \
+	((pos) ? : list_entry(head, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_continue - continue iteration over list of given type
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Continue to iterate over list of given type, continuing after
+ * the current position.
+ */
+#define list_for_each_entry_continue(pos, head, member) 		\
+	for (pos = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head);	\
+	     pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_continue_reverse - iterate backwards from the given point
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Start to iterate over list of given type backwards, continuing after
+ * the current position.
+ */
+#define list_for_each_entry_continue_reverse(pos, head, member)		\
+	for (pos = list_entry(pos->member.prev, typeof(*pos), member);	\
+	     &pos->member != (head);	\
+	     pos = list_entry(pos->member.prev, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_from - iterate over list of given type from the current point
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type, continuing from current position.
+ */
+#define list_for_each_entry_from(pos, head, member) 			\
+	for (; &pos->member != (head);	\
+	     pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:	the type * to use as a loop cursor.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		n = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_continue
+ * @pos:	the type * to use as a loop cursor.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type, continuing after current point,
+ * safe against removal of list entry.
+ */
+#define list_for_each_entry_safe_continue(pos, n, head, member) 		\
+	for (pos = list_entry(pos->member.next, typeof(*pos), member), 		\
+		n = list_entry(pos->member.next, typeof(*pos), member);		\
+	     &pos->member != (head);						\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_from
+ * @pos:	the type * to use as a loop cursor.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Iterate over list of given type from current point, safe against
+ * removal of list entry.
+ */
+#define list_for_each_entry_safe_from(pos, n, head, member) 			\
+	for (n = list_entry(pos->member.next, typeof(*pos), member);		\
+	     &pos->member != (head);						\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_for_each_entry_safe_reverse
+ * @pos:	the type * to use as a loop cursor.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Iterate backwards over list of given type, safe against removal
+ * of list entry.
+ */
+#define list_for_each_entry_safe_reverse(pos, n, head, member)		\
+	for (pos = list_entry((head)->prev, typeof(*pos), member),	\
+		n = list_entry(pos->member.prev, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = n, n = list_entry(n->member.prev, typeof(*n), member))
+
+/*
+ * Double linked lists with a single pointer list head.
+ * Mostly useful for hash tables where the two pointer list head is
+ * too wasteful.
+ * You lose the ability to access the tail in O(1).
+ */
+
+struct hlist_head {
+	struct hlist_node *first;
+};
+
+struct hlist_node {
+	struct hlist_node *next, **pprev;
+};
+
+#define HLIST_HEAD_INIT { .first = NULL }
+#define HLIST_HEAD(name) struct hlist_head name = {  .first = NULL }
+#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)
+static inline void INIT_HLIST_NODE(struct hlist_node *h)
+{
+	h->next = NULL;
+	h->pprev = NULL;
+}
+
+static inline int hlist_unhashed(const struct hlist_node *h)
+{
+	return !h->pprev;
+}
+
+static inline int hlist_empty(const struct hlist_head *h)
+{
+	return !h->first;
+}
+
+static inline void __hlist_del(struct hlist_node *n)
+{
+	struct hlist_node *next = n->next;
+	struct hlist_node **pprev = n->pprev;
+	*pprev = next;
+	if (next)
+		next->pprev = pprev;
+}
+
+static inline void hlist_del(struct hlist_node *n)
+{
+	__hlist_del(n);
+	n->next = NULL;
+	n->pprev = NULL;
+}
+
+static inline void hlist_del_init(struct hlist_node *n)
+{
+	if (!hlist_unhashed(n)) {
+		__hlist_del(n);
+		INIT_HLIST_NODE(n);
+	}
+}
+
+
+static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h)
+{
+	struct hlist_node *first = h->first;
+	n->next = first;
+	if (first)
+		first->pprev = &n->next;
+	h->first = n;
+	n->pprev = &h->first;
+}
+
+
+/* next must be != NULL */
+static inline void hlist_add_before(struct hlist_node *n,
+					struct hlist_node *next)
+{
+	n->pprev = next->pprev;
+	n->next = next;
+	next->pprev = &n->next;
+	*(n->pprev) = n;
+}
+
+static inline void hlist_add_after(struct hlist_node *n,
+					struct hlist_node *next)
+{
+	next->next = n->next;
+	n->next = next;
+	next->pprev = &n->next;
+
+	if(next->next)
+		next->next->pprev  = &next->next;
+}
+
+#define hlist_entry(ptr, type, member) container_of(ptr,type,member)
+
+#define hlist_for_each(pos, head) \
+	for (pos = (head)->first; pos; pos = pos->next)
+
+#define hlist_for_each_safe(pos, n, head) \
+	for (pos = (head)->first; pos; pos = n)
+
+/**
+ * hlist_for_each_entry	- iterate over list of given type
+ * @tpos:	the type * to use as a loop cursor.
+ * @pos:	the &struct hlist_node to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry(tpos, pos, head, member)			 \
+	for (pos = (head)->first; pos &&				 \
+		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+	     pos = pos->next)
+
+/**
+ * hlist_for_each_entry_continue - iterate over a hlist continuing after current point
+ * @tpos:	the type * to use as a loop cursor.
+ * @pos:	the &struct hlist_node to use as a loop cursor.
+ * @member:	the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_continue(tpos, pos, member)		\
+	for (pos = (pos)->next; pos &&					\
+	     ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;});   \
+	     pos = pos->next)
+
+/**
+ * hlist_for_each_entry_from - iterate over a hlist continuing from current point
+ * @tpos:	the type * to use as a loop cursor.
+ * @pos:	the &struct hlist_node to use as a loop cursor.
+ * @member:	the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_from(tpos, pos, member)			 \
+	for (; pos &&			 \
+		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+	     pos = pos->next)
+
+/**
+ * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @tpos:	the type * to use as a loop cursor.
+ * @pos:	the &struct hlist_node to use as a loop cursor.
+ * @n:		another &struct hlist_node to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_safe(tpos, pos, n, head, member) 		 \
+	for (pos = (head)->first;					 \
+	     pos && ({ n = pos->next; 1; }) && 				 \
+		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
+	     pos = n)
+
+#endif
diff --git a/package/wprobe/src/user/wprobe-info.c b/package/wprobe/src/user/wprobe-info.c
new file mode 100644
index 000000000..b8918711c
--- /dev/null
+++ b/package/wprobe/src/user/wprobe-info.c
@@ -0,0 +1,175 @@
+/*
+ * wprobe-test.c: Wireless probe user space test code
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/wprobe.h>
+#include "wprobe.h"
+
+static const char *
+wprobe_dump_value(struct wprobe_attribute *attr)
+{
+	static char buf[128];
+
+#define HANDLE_TYPE(_type, _format) \
+	case WPROBE_VAL_##_type: \
+		snprintf(buf, sizeof(buf), _format, attr->val._type); \
+		break
+
+	switch(attr->type) {
+		HANDLE_TYPE(S8, "%d");
+		HANDLE_TYPE(S16, "%d");
+		HANDLE_TYPE(S32, "%d");
+		HANDLE_TYPE(S64, "%lld");
+		HANDLE_TYPE(U8, "%d");
+		HANDLE_TYPE(U16, "%d");
+		HANDLE_TYPE(U32, "%d");
+		HANDLE_TYPE(U64, "%lld");
+		case WPROBE_VAL_STRING:
+			/* FIXME: implement this */
+		default:
+			strncpy(buf, "<unknown>", sizeof(buf));
+			break;
+	}
+	if ((attr->flags & WPROBE_F_KEEPSTAT) &&
+		(attr->val.n > 0)) {
+		int len = strlen(buf);
+		snprintf(buf + len, sizeof(buf) - len, " (avg: %.02f; stdev: %.02f, n=%d)", attr->val.avg, attr->val.stdev, attr->val.n);
+	}
+#undef HANDLE_TYPE
+
+	return buf;
+}
+
+
+static void
+wprobe_dump_data(const char *ifname, struct list_head *gl, struct list_head *ll, struct list_head *ls)
+{
+	struct wprobe_attribute *attr;
+	struct wprobe_link *link;
+	bool first = true;
+
+	fprintf(stderr, "\n");
+	wprobe_request_data(ifname, gl, NULL, 2);
+	list_for_each_entry(attr, gl, list) {
+		fprintf(stderr, (first ?
+			"Global:            %s=%s\n" :
+			"                   %s=%s\n"),
+			attr->name,
+			wprobe_dump_value(attr)
+		);
+		first = false;
+	}
+
+	list_for_each_entry(link, ls, list) {
+		first = true;
+		wprobe_request_data(ifname, ll, link->addr, 2);
+		list_for_each_entry(attr, ll, list) {
+			if (first) {
+				fprintf(stderr,
+					"%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n",
+					link->addr[0], link->addr[1], link->addr[2],
+					link->addr[3], link->addr[4], link->addr[5],
+					attr->name,
+					wprobe_dump_value(attr));
+				first = false;
+			} else {
+				fprintf(stderr,
+					"                   %s=%s\n",
+					attr->name,
+					wprobe_dump_value(attr));
+			}
+		}
+	}
+}
+
+static const char *attr_typestr[] = {
+	[0] = "Unknown",
+	[WPROBE_VAL_STRING] = "String",
+	[WPROBE_VAL_U8] = "Unsigned 8 bit",
+	[WPROBE_VAL_U16] = "Unsigned 16 bit",
+	[WPROBE_VAL_U32] = "Unsigned 32 bit",
+	[WPROBE_VAL_U64] = "Unsigned 64 bit",
+	[WPROBE_VAL_S8] = "Signed 8 bit",
+	[WPROBE_VAL_S16] = "Signed 16 bit",
+	[WPROBE_VAL_S32] = "Signed 32 bit",
+	[WPROBE_VAL_S64] = "Signed 64 bit",
+};
+
+static int usage(const char *prog)
+{
+	fprintf(stderr, "Usage: %s <interface>\n", prog);
+	return 1;
+}
+
+int main(int argc, char **argv)
+{
+	struct wprobe_attribute *attr;
+	const char *ifname;
+	LIST_HEAD(global_attr);
+	LIST_HEAD(link_attr);
+	LIST_HEAD(links);
+	int i = 0;
+
+	if (argc < 2)
+		return usage(argv[0]);
+
+	ifname = argv[1];
+
+	if (wprobe_init() != 0)
+		return -1;
+
+	wprobe_dump_attributes(ifname, false, &global_attr, NULL);
+	wprobe_dump_attributes(ifname, true, &link_attr, NULL);
+
+	if (list_empty(&global_attr) &&
+		list_empty(&link_attr)) {
+		fprintf(stderr, "Interface '%s' not found\n", ifname);
+		return -1;
+	}
+
+	list_for_each_entry(attr, &global_attr, list) {
+		fprintf(stderr, "Global attribute: '%s' (%s)\n",
+			attr->name, attr_typestr[attr->type]);
+	}
+	list_for_each_entry(attr, &link_attr, list) {
+		fprintf(stderr, "Link attribute: '%s' (%s)\n",
+			attr->name, attr_typestr[attr->type]);
+	}
+
+	while (1) {
+		usleep(100 * 1000);
+		wprobe_measure(ifname);
+
+		if (i-- > 0)
+			continue;
+
+		i = 10;
+		wprobe_update_links(ifname, &links);
+		wprobe_dump_data(ifname, &global_attr, &link_attr, &links);
+	}
+	wprobe_free();
+
+	return 0;
+}
diff --git a/package/wprobe/src/user/wprobe.c b/package/wprobe/src/user/wprobe.c
new file mode 100644
index 000000000..d591207da
--- /dev/null
+++ b/package/wprobe/src/user/wprobe.c
@@ -0,0 +1,472 @@
+/*
+ * wprobe.c: Wireless probe user space library
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <math.h>
+#include <linux/wprobe.h>
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#include <netlink/genl/family.h>
+#include "wprobe.h"
+
+#define DEBUG 1
+#ifdef DEBUG
+#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
+static struct nl_handle *handle = NULL;
+static struct nl_cache *cache = NULL;
+static struct genl_family *family = NULL;
+static struct nlattr *tb[WPROBE_ATTR_LAST+1];
+static struct nla_policy attribute_policy[WPROBE_ATTR_LAST+1] = {
+	[WPROBE_ATTR_ID] = { .type = NLA_U32 },
+	[WPROBE_ATTR_MAC] = { .type = NLA_UNSPEC, .minlen = 6, .maxlen = 6 },
+	[WPROBE_ATTR_NAME] = { .type = NLA_STRING },
+	[WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
+	[WPROBE_ATTR_TYPE] = { .type = NLA_U8 },
+	[WPROBE_VAL_S8] = { .type = NLA_U8 },
+	[WPROBE_VAL_S16] = { .type = NLA_U16 },
+	[WPROBE_VAL_S32] = { .type = NLA_U32 },
+	[WPROBE_VAL_S64] = { .type = NLA_U64 },
+	[WPROBE_VAL_U8] = { .type = NLA_U8 },
+	[WPROBE_VAL_U16] = { .type = NLA_U16 },
+	[WPROBE_VAL_U32] = { .type = NLA_U32 },
+	[WPROBE_VAL_U64] = { .type = NLA_U64 },
+	[WPROBE_VAL_SUM] = { .type = NLA_U64 },
+	[WPROBE_VAL_SUM_SQ] = { .type = NLA_U64 },
+	[WPROBE_VAL_SAMPLES] = { .type = NLA_U32 },
+};
+
+static int
+error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
+{
+	int *ret = arg;
+	*ret = err->error;
+	return NL_STOP;
+}
+
+static int
+finish_handler(struct nl_msg *msg, void *arg)
+{
+	int *ret = arg;
+	*ret = 0;
+	return NL_SKIP;
+}
+
+static int
+ack_handler(struct nl_msg *msg, void *arg)
+{
+	int *ret = arg;
+	*ret = 0;
+	return NL_STOP;
+}
+
+
+void
+wprobe_free(void)
+{
+	if (cache)
+		nl_cache_free(cache);
+	if (handle)
+		nl_handle_destroy(handle);
+	handle = NULL;
+	cache = NULL;
+}
+
+int
+wprobe_init(void)
+{
+	handle = nl_handle_alloc();
+	if (!handle) {
+		DPRINTF("Failed to create handle\n");
+		goto err;
+	}
+
+	if (genl_connect(handle)) {
+		DPRINTF("Failed to connect to generic netlink\n");
+		goto err;
+	}
+
+	cache = genl_ctrl_alloc_cache(handle);
+	if (!cache) {
+		DPRINTF("Failed to allocate netlink cache\n");
+		goto err;
+	}
+
+	family = genl_ctrl_search_by_name(cache, "wprobe");
+	if (!family) {
+		DPRINTF("wprobe API not present\n");
+		goto err;
+	}
+	return 0;
+
+err:
+	wprobe_free();
+	return -EINVAL;
+}
+
+
+static struct nl_msg *
+wprobe_new_msg(const char *ifname, int cmd, bool dump)
+{
+	struct nl_msg *msg;
+	uint32_t flags = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return NULL;
+
+	if (dump)
+		flags |= NLM_F_DUMP;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(family),
+			0, flags, cmd, 0);
+
+	NLA_PUT_STRING(msg, WPROBE_ATTR_INTERFACE, ifname);
+nla_put_failure:
+	return msg;
+}
+
+static int
+wprobe_send_msg(struct nl_msg *msg, void *callback, void *arg)
+{
+	struct nl_cb *cb;
+	int err = 0;
+
+	cb = nl_cb_alloc(NL_CB_DEFAULT);
+	if (!cb)
+		goto out_no_cb;
+
+	if (callback)
+		nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, arg);
+
+	err = nl_send_auto_complete(handle, msg);
+	if (err < 0)
+		goto out;
+
+	err = 1;
+
+	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
+	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
+	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
+
+	while (err > 0)
+		nl_recvmsgs(handle, cb);
+
+out:
+	nl_cb_put(cb);
+out_no_cb:
+	nlmsg_free(msg);
+	return err;
+}
+
+struct wprobe_attr_cb {
+	struct list_head *list;
+	char *addr;
+};
+
+static int
+save_attribute_handler(struct nl_msg *msg, void *arg)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	const char *name = "N/A";
+	struct wprobe_attribute *attr;
+	int type = 0;
+	struct wprobe_attr_cb *cb = arg;
+
+	nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+			genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+	if (tb[WPROBE_ATTR_NAME])
+		name = nla_data(tb[WPROBE_ATTR_NAME]);
+
+	attr = malloc(sizeof(struct wprobe_attribute) + strlen(name) + 1);
+	if (!attr)
+		return -1;
+
+	memset(attr, 0, sizeof(struct wprobe_attribute));
+
+	if (tb[WPROBE_ATTR_ID])
+		attr->id = nla_get_u32(tb[WPROBE_ATTR_ID]);
+
+	if (tb[WPROBE_ATTR_MAC] && cb->addr)
+		memcpy(cb->addr, nla_data(tb[WPROBE_ATTR_MAC]), 6);
+
+	if (tb[WPROBE_ATTR_FLAGS])
+		attr->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
+
+	if (tb[WPROBE_ATTR_TYPE])
+		type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
+
+	if ((type < WPROBE_VAL_STRING) ||
+		(type > WPROBE_VAL_U64))
+		type = 0;
+
+	attr->type = type;
+	strcpy(attr->name, name);
+	INIT_LIST_HEAD(&attr->list);
+	list_add(&attr->list, cb->list);
+	return 0;
+}
+
+
+int
+wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr)
+{
+	struct nl_msg *msg;
+	struct wprobe_attr_cb cb;
+
+	cb.list = list;
+	cb.addr = addr;
+	msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LIST, true);
+	if (!msg)
+		return -ENOMEM;
+
+	if (link)
+		NLA_PUT(msg, WPROBE_ATTR_MAC, 6, "\x00\x00\x00\x00\x00\x00");
+
+	return wprobe_send_msg(msg, save_attribute_handler, &cb);
+
+nla_put_failure:
+	nlmsg_free(msg);
+	return -EINVAL;
+}
+
+static struct wprobe_link *
+get_link(struct list_head *list, const char *addr)
+{
+	struct wprobe_link *l;
+
+	list_for_each_entry(l, list, list) {
+		if (!memcmp(l->addr, addr, 6)) {
+			list_del_init(&l->list);
+			goto out;
+		}
+	}
+
+	/* no previous link found, allocate a new one */
+	l = malloc(sizeof(struct wprobe_link));
+	if (!l)
+		goto out;
+
+	memset(l, 0, sizeof(struct wprobe_link));
+	memcpy(l->addr, addr, sizeof(l->addr));
+	INIT_LIST_HEAD(&l->list);
+
+out:
+	return l;
+}
+
+struct wprobe_save_cb {
+	struct list_head *list;
+	struct list_head old_list;
+};
+
+static int
+save_link_handler(struct nl_msg *msg, void *arg)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct wprobe_link *link;
+	struct wprobe_save_cb *cb = arg;
+	const char *addr;
+
+	nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+			genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+	if (!tb[WPROBE_ATTR_MAC] || (nla_len(tb[WPROBE_ATTR_MAC]) != 6))
+		return -1;
+
+	addr = nla_data(tb[WPROBE_ATTR_MAC]);
+	link = get_link(&cb->old_list, addr);
+	if (!link)
+		return -1;
+
+	if (tb[WPROBE_ATTR_FLAGS])
+		link->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
+
+	list_add_tail(&link->list, cb->list);
+	return 0;
+}
+
+
+int
+wprobe_update_links(const char *ifname, struct list_head *list)
+{
+	struct wprobe_link *l, *tmp;
+	struct nl_msg *msg;
+	struct wprobe_save_cb cb;
+	int err;
+
+	INIT_LIST_HEAD(&cb.old_list);
+	list_splice_init(list, &cb.old_list);
+	cb.list = list;
+
+	msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LINKS, true);
+	if (!msg)
+		return -ENOMEM;
+
+	err = wprobe_send_msg(msg, save_link_handler, &cb);
+	if (err < 0)
+		return err;
+
+	list_for_each_entry_safe(l, tmp, &cb.old_list, list) {
+		list_del(&l->list);
+		free(l);
+	}
+
+	return 0;
+}
+
+void
+wprobe_measure(const char *ifname)
+{
+	struct nl_msg *msg;
+
+	msg = wprobe_new_msg(ifname, WPROBE_CMD_MEASURE, false);
+	if (!msg)
+		return;
+
+	wprobe_send_msg(msg, NULL, NULL);
+}
+
+struct wprobe_request_cb {
+	struct list_head *list;
+	struct list_head old_list;
+	char *addr;
+};
+
+static int
+save_attrdata_handler(struct nl_msg *msg, void *arg)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct wprobe_request_cb *cb = arg;
+	struct wprobe_attribute *attr;
+	int type, id;
+
+	nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+			genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+	if (!tb[WPROBE_ATTR_ID])
+		return -1;
+
+	if (!tb[WPROBE_ATTR_TYPE])
+		return -1;
+
+	id = nla_get_u32(tb[WPROBE_ATTR_ID]);
+	list_for_each_entry(attr, &cb->old_list, list) {
+		if (attr->id == id)
+			goto found;
+	}
+	/* not found */
+	return -1;
+
+found:
+	list_del_init(&attr->list);
+
+	type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
+	if (type != attr->type) {
+		DPRINTF("WARNING: type mismatch for %s attribute '%s' (%d != %d)\n",
+			(cb->addr ? "link" : "global"),
+			attr->name,
+			type, attr->type);
+		goto out;
+	}
+
+	if ((type < WPROBE_VAL_STRING) ||
+		(type > WPROBE_VAL_U64))
+		goto out;
+
+	memset(&attr->val, 0, sizeof(attr->val));
+
+#define HANDLE_INT_TYPE(_idx, _type) \
+	case WPROBE_VAL_S##_type: \
+	case WPROBE_VAL_U##_type: \
+		attr->val.U##_type = nla_get_u##_type(tb[_idx]); \
+		break
+
+	switch(type) {
+		HANDLE_INT_TYPE(type, 8);
+		HANDLE_INT_TYPE(type, 16);
+		HANDLE_INT_TYPE(type, 32);
+		HANDLE_INT_TYPE(type, 64);
+		case WPROBE_VAL_STRING:
+			/* unimplemented */
+			break;
+	}
+#undef HANDLE_TYPE
+
+	if (attr->flags & WPROBE_F_KEEPSTAT) {
+		if (tb[WPROBE_VAL_SUM])
+			attr->val.s = nla_get_u64(tb[WPROBE_VAL_SUM]);
+
+		if (tb[WPROBE_VAL_SUM_SQ])
+			attr->val.ss = nla_get_u64(tb[WPROBE_VAL_SUM_SQ]);
+
+		if (tb[WPROBE_VAL_SAMPLES])
+			attr->val.n = nla_get_u32(tb[WPROBE_VAL_SAMPLES]);
+
+		if (attr->val.n > 0) {
+			float avg = ((float) attr->val.s) / attr->val.n;
+			float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg));
+			attr->val.avg = avg;
+			attr->val.stdev = stdev;
+		}
+	}
+
+out:
+	list_add_tail(&attr->list, cb->list);
+	return 0;
+}
+
+
+int
+wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale)
+{
+	struct wprobe_request_cb cb;
+	struct nl_msg *msg;
+	int err;
+
+	msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_INFO, true);
+	if (!msg)
+		return -ENOMEM;
+
+	if (scale < 0)
+		NLA_PUT_U32(msg, WPROBE_ATTR_FLAGS, WPROBE_F_RESET);
+	else if (scale > 0)
+		NLA_PUT_U32(msg, WPROBE_ATTR_SCALE, scale);
+
+	if (addr)
+		NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr);
+
+nla_put_failure:
+	INIT_LIST_HEAD(&cb.old_list);
+	list_splice_init(attrs, &cb.old_list);
+	cb.list = attrs;
+
+	err = wprobe_send_msg(msg, save_attrdata_handler, &cb);
+	list_splice(&cb.old_list, attrs->prev);
+	return err;
+}
+
+
diff --git a/package/wprobe/src/user/wprobe.h b/package/wprobe/src/user/wprobe.h
new file mode 100644
index 000000000..e0c33faef
--- /dev/null
+++ b/package/wprobe/src/user/wprobe.h
@@ -0,0 +1,143 @@
+/*
+ * wprobe.h: Wireless probe user space library
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef __WPROBE_USER_H
+#define __WPROBE_USER_H
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "list.h"
+
+/**
+ * struct wprobe_value: data structure for attribute values
+ * @STRING: string value (currently unsupported)
+ * @U8: unsigned 8-bit integer value
+ * @U16: unsigned 16-bit integer value
+ * @U32: unsigned 32-bit integer value
+ * @U64: unsigned 64-bit integer value
+ * @S8: signed 8-bit integer value
+ * @S16: signed 16-bit integer value
+ * @S32: signed 32-bit integer value
+ * @S64: signed 64-bit integer value
+ *
+ * @n: number of sample values 
+ * @avg: average value
+ * @stdev: standard deviation
+ * @s: sum of all sample values (internal use)
+ * @ss: sum of all sample values squared (internal use)
+ */
+struct wprobe_value {
+	/* attribute value */
+	union {
+		const char *STRING;
+		uint8_t U8;
+		uint16_t U16;
+		uint32_t U32;
+		uint64_t U64;
+		int8_t S8;
+		int16_t S16;
+		int32_t S32;
+		int64_t S64;
+	};
+	/* statistics */
+	int64_t s, ss;
+	float avg, stdev;
+	unsigned int n;
+};
+
+/**
+ * struct wprobe_attribute: data structures for attribute descriptions
+ * @list: linked list data structure for a list of attributes
+ * @id: attribute id
+ * @type: netlink type for the attribute (see kernel api documentation)
+ * @flags: attribute flags (see kernel api documentation)
+ * @val: cached version of the last netlink query, will be overwritten on each request
+ * @name: attribute name
+ */
+struct wprobe_attribute {
+	struct list_head list;
+	int id;
+	int type;
+	uint32_t flags;
+	struct wprobe_value val;
+	char name[];
+};
+
+/**
+ * struct wprobe_link: data structure for the link description
+ * @list: linked list data structure for a list of links 
+ * @flags: link flags (see kernel api documentation)
+ * @addr: mac address of the remote link partner
+ */
+struct wprobe_link {
+	struct list_head list;
+	uint32_t flags;
+	unsigned char addr[6];
+};
+
+/**
+ * wprobe_init: initialize internal data structures and connect to the wprobe netlink api
+ */
+extern int wprobe_init(void);
+
+/**
+ * wprobe_free: free all internally allocated data structures
+ */
+extern void wprobe_free(void);
+
+/**
+ * wprobe_update_links: get a list of all link partners
+ * @ifname: name of the wprobe interface
+ * @list: linked list for storing link descriptions
+ *
+ * when wprobe_update_links is called multiple times, the linked list 
+ * is updated with new link partners, old entries are automatically expired
+ */
+extern int wprobe_update_links(const char *ifname, struct list_head *list);
+
+/**
+ * wprobe_measure: start a measurement request for all global attributes
+ * @ifname: name of the wprobe interface
+ *
+ * not all attributes are automatically filled with data, since for some
+ * it may be desirable to control the sampling interval from user space
+ * you can use this function to do that.
+ */
+extern void wprobe_measure(const char *ifname);
+
+/**
+ * wprobe_dump_attributes: create a linked list of available attributes
+ * @ifname: name of the wprobe interface
+ * @link: false: get the list of global attributes; true: get the list of per-link attributes
+ * @list: linked list to store the attributes in
+ * @addr: buffer to store the interface's mac address in (optional)
+ *
+ * attributes must be freed by the caller
+ */
+extern int wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr);
+
+/**
+ * wprobe_request_data: request new sampling values for the given list of attributes
+ * @ifname: name of the wprobe interface
+ * @attrs: attribute list
+ * @addr: (optional) mac address of the link partner
+ * @scale: scale down values by a factor (scale < 0: reset statistics entirely)
+ *
+ * if addr is unset, attrs must point to the list of global attributes,
+ * if addr is set, attrs must point to the list of per-link attributes
+ */
+extern int wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale);
+
+#endif