contrib/hostapd/hostapd/wme.h

   1 /*
   2  * hostapd / WMM (Wi-Fi Multimedia)
   3  * Copyright 2002-2003, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Alternatively, this software may be distributed under the terms of BSD
  11  * license.
  12  *
  13  * See README and COPYING for more details.
  14  */
  15
  16 #ifndef WME_H
  17 #define WME_H
  18
  19 /*
  20  * WMM Information Element (used in (Re)Association Request frames; may also be
  21  * used in Beacon frames)
  22  */
  23 struct wmm_information_element {
  24         /* Element ID: 221 (0xdd); Length: 7 */
  25         /* required fields for WMM version 1 */
  26         u8 oui[3]; /* 00:50:f2 */
  27         u8 oui_type; /* 2 */
  28         u8 oui_subtype; /* 0 */
  29         u8 version; /* 1 for WMM version 1.0 */
  30         u8 qos_info; /* AP/STA specific QoS info */
  31
  32 } __attribute__ ((packed));
  33
  34 #define WMM_AC_AIFSN_MASK 0x0f
  35 #define WMM_AC_AIFNS_SHIFT 0
  36 #define WMM_AC_ACM 0x10
  37 #define WMM_AC_ACI_MASK 0x60
  38 #define WMM_AC_ACI_SHIFT 5
  39
  40 #define WMM_AC_ECWMIN_MASK 0x0f
  41 #define WMM_AC_ECWMIN_SHIFT 0
  42 #define WMM_AC_ECWMAX_MASK 0xf0
  43 #define WMM_AC_ECWMAX_SHIFT 4
  44
  45 struct wmm_ac_parameter {
  46         u8 aci_aifsn; /* AIFSN, ACM, ACI */
  47         u8 cw; /* ECWmin, ECWmax (CW = 2^ECW - 1) */
  48         le16 txop_limit;
  49 } __attribute__ ((packed));
  50
  51 /*
  52  * WMM Parameter Element (used in Beacon, Probe Response, and (Re)Association
  53  * Response frmaes)
  54  */
  55 struct wmm_parameter_element {
  56         /* Element ID: 221 (0xdd); Length: 24 */
  57         /* required fields for WMM version 1 */
  58         u8 oui[3]; /* 00:50:f2 */
  59         u8 oui_type; /* 2 */
  60         u8 oui_subtype; /* 1 */
  61         u8 version; /* 1 for WMM version 1.0 */
  62         u8 qos_info; /* AP/STA specif QoS info */
  63         u8 reserved; /* 0 */
  64         struct wmm_ac_parameter ac[4]; /* AC_BE, AC_BK, AC_VI, AC_VO */
  65
  66 } __attribute__ ((packed));
  67
  68 /* WMM TSPEC Element */
  69 struct wmm_tspec_element {
  70         u8 eid; /* 221 = 0xdd */
  71         u8 length; /* 6 + 55 = 61 */
  72         u8 oui[3]; /* 00:50:f2 */
  73         u8 oui_type; /* 2 */
  74         u8 oui_subtype; /* 2 */
  75         u8 version; /* 1 */
  76         /* WMM TSPEC body (55 octets): */
  77         u8 ts_info[3];
  78         le16 nominal_msdu_size;
  79         le16 maximum_msdu_size;
  80         le32 minimum_service_interval;
  81         le32 maximum_service_interval;
  82         le32 inactivity_interval;
  83         le32 suspension_interval;
  84         le32 service_start_time;
  85         le32 minimum_data_rate;
  86         le32 mean_data_rate;
  87         le32 peak_data_rate;
  88         le32 maximum_burst_size;
  89         le32 delay_bound;
  90         le32 minimum_phy_rate;
  91         le16 surplus_bandwidth_allowance;
  92         le16 medium_time;
  93 } __attribute__ ((packed));
  94
  95
  96 /* Access Categories / ACI to AC coding */
  97 enum {
  98         WMM_AC_BE = 0 /* Best Effort */,
  99         WMM_AC_BK = 1 /* Background */,
 100         WMM_AC_VI = 2 /* Video */,
 101         WMM_AC_VO = 3 /* Voice */
 102 };
 103
 104 struct ieee80211_mgmt;
 105
 106 u8 * hostapd_eid_wmm(struct hostapd_data *hapd, u8 *eid);
 107 int hostapd_eid_wmm_valid(struct hostapd_data *hapd, u8 *eid, size_t len);
 108 int hostapd_wmm_sta_config(struct hostapd_data *hapd, struct sta_info *sta);
 109 void hostapd_wmm_action(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
 110                         size_t len);
 111
 112 #endif /* WME_H */