blob: 7733f66ee2c411021b2232b70cee1382e51492c7 [file] [log] [blame]
Johannes Berg39192c02008-09-09 14:49:03 +02001/*
2 * spectrum management
3 *
4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2007-2008, Intel Corporation
10 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/ieee80211.h>
Johannes Bergd3236552009-04-20 14:31:42 +020018#include <net/cfg80211.h>
Johannes Berg39192c02008-09-09 14:49:03 +020019#include <net/mac80211.h>
20#include "ieee80211_i.h"
21#include "sta_info.h"
22#include "wme.h"
23
24static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
25 struct ieee80211_msrment_ie *request_ie,
26 const u8 *da, const u8 *bssid,
27 u8 dialog_token)
28{
29 struct ieee80211_local *local = sdata->local;
30 struct sk_buff *skb;
31 struct ieee80211_mgmt *msr_report;
32
33 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
34 sizeof(struct ieee80211_msrment_ie));
35
36 if (!skb) {
37 printk(KERN_ERR "%s: failed to allocate buffer for "
Johannes Berg47846c92009-11-25 17:46:19 +010038 "measurement report frame\n", sdata->name);
Johannes Berg39192c02008-09-09 14:49:03 +020039 return;
40 }
41
42 skb_reserve(skb, local->hw.extra_tx_headroom);
43 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
44 memset(msr_report, 0, 24);
45 memcpy(msr_report->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +010046 memcpy(msr_report->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg39192c02008-09-09 14:49:03 +020047 memcpy(msr_report->bssid, bssid, ETH_ALEN);
48 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
49 IEEE80211_STYPE_ACTION);
50
51 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
52 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
53 msr_report->u.action.u.measurement.action_code =
54 WLAN_ACTION_SPCT_MSR_RPRT;
55 msr_report->u.action.u.measurement.dialog_token = dialog_token;
56
57 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
58 msr_report->u.action.u.measurement.length =
59 sizeof(struct ieee80211_msrment_ie);
60
61 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
62 sizeof(struct ieee80211_msrment_ie));
63 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
64 msr_report->u.action.u.measurement.msr_elem.mode |=
65 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
66 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
67
Johannes Berg62ae67b2009-11-18 18:42:05 +010068 ieee80211_tx_skb(sdata, skb);
Johannes Berg39192c02008-09-09 14:49:03 +020069}
70
71void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
72 struct ieee80211_mgmt *mgmt,
73 size_t len)
74{
75 /*
76 * Ignoring measurement request is spec violation.
77 * Mandatory measurements must be reported optional
78 * measurements might be refused or reported incapable
79 * For now just refuse
80 * TODO: Answer basic measurement as unmeasured
81 */
82 ieee80211_send_refuse_measurement_request(sdata,
83 &mgmt->u.action.u.measurement.msr_elem,
84 mgmt->sa, mgmt->bssid,
85 mgmt->u.action.u.measurement.dialog_token);
86}