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1 | /* |
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> |
18 | #include <net/cfg80211.h> |
19 | #include <net/mac80211.h> |
20 | #include "ieee80211_i.h" |
21 | #include "sta_info.h" |
22 | #include "wme.h" |
23 | |
24 | static 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 " |
38 | "measurement report frame\n", sdata->name); |
39 | 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); |
46 | memcpy(msr_report->sa, sdata->vif.addr, ETH_ALEN); |
47 | 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 | |
68 | ieee80211_tx_skb(sdata, skb); |
69 | } |
70 | |
71 | void 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 | } |
87 |
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v2.6.34-rc5
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