| Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 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/wireless.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->dev->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->dev->dev_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 | |
| Johannes Berg | e50db65 | 2008-09-09 15:07:09 +0200 | [diff] [blame] | 68 | ieee80211_tx_skb(sdata, skb, 0); |
| Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 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 | } |