a0413b1734
Initialize WMM AC data structures upon successful association with an AP that publishes WMM support, and deinitialize the data structure when the association is no longer valid. Signed-off-by: Moshe Benji <moshe.benji@intel.com> Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
129 lines
3 KiB
C
129 lines
3 KiB
C
/*
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* Wi-Fi Multimedia Admission Control (WMM-AC)
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* Copyright(c) 2014, Intel Mobile Communication GmbH.
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* Copyright(c) 2014, Intel Corporation. All rights reserved.
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "utils/common.h"
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#include "common/ieee802_11_common.h"
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#include "wpa_supplicant_i.h"
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#include "driver_i.h"
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#include "wmm_ac.h"
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static struct wmm_ac_assoc_data *
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wmm_ac_process_param_elem(struct wpa_supplicant *wpa_s, const u8 *ies,
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size_t ies_len)
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{
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struct ieee802_11_elems elems;
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struct wmm_parameter_element *wmm_params;
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struct wmm_ac_assoc_data *assoc_data;
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int i;
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/* Parsing WMM Parameter Element */
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if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) != ParseOK) {
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wpa_printf(MSG_DEBUG, "WMM AC: could not parse assoc ies");
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return NULL;
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}
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if (!elems.wmm) {
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wpa_printf(MSG_DEBUG, "WMM AC: No WMM IE");
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return NULL;
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}
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if (elems.wmm_len != sizeof(*wmm_params)) {
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wpa_printf(MSG_WARNING, "WMM AC: Invalid WMM ie length");
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return NULL;
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}
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wmm_params = (struct wmm_parameter_element *)(elems.wmm);
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assoc_data = os_zalloc(sizeof(*assoc_data));
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if (!assoc_data)
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return NULL;
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for (i = 0; i < WMM_AC_NUM; i++)
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assoc_data->ac_params[i].acm =
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!!(wmm_params->ac[i].aci_aifsn & WMM_AC_ACM);
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wpa_printf(MSG_DEBUG,
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"WMM AC: AC mandatory: AC_BE=%u AC_BK=%u AC_VI=%u AC_VO=%u",
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assoc_data->ac_params[WMM_AC_BE].acm,
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assoc_data->ac_params[WMM_AC_BK].acm,
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assoc_data->ac_params[WMM_AC_VI].acm,
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assoc_data->ac_params[WMM_AC_VO].acm);
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return assoc_data;
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}
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static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
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size_t ies_len, const struct wmm_params *wmm_params)
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{
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struct wmm_ac_assoc_data *assoc_data;
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u8 ac;
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if (wpa_s->wmm_ac_assoc_info) {
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wpa_printf(MSG_ERROR, "WMM AC: Already initialized");
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return -1;
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}
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if (!ies) {
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wpa_printf(MSG_ERROR, "WMM AC: Missing IEs");
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return -1;
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}
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if (!(wmm_params->info_bitmap & WMM_PARAMS_UAPSD_QUEUES_INFO)) {
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wpa_printf(MSG_DEBUG, "WMM AC: Missing U-APSD configuration");
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return -1;
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}
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assoc_data = wmm_ac_process_param_elem(wpa_s, ies, ies_len);
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if (!assoc_data)
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return -1;
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wpa_printf(MSG_DEBUG, "WMM AC: U-APSD queues=0x%x",
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wmm_params->uapsd_queues);
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for (ac = 0; ac < WMM_AC_NUM; ac++) {
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assoc_data->ac_params[ac].uapsd =
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!!(wmm_params->uapsd_queues & BIT(ac));
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}
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wpa_s->wmm_ac_assoc_info = assoc_data;
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return 0;
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}
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static void wmm_ac_deinit(struct wpa_supplicant *wpa_s)
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{
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os_free(wpa_s->wmm_ac_assoc_info);
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wpa_s->wmm_ac_assoc_info = NULL;
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}
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void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
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size_t ies_len, const struct wmm_params *wmm_params)
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{
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if (wmm_ac_init(wpa_s, ies, ies_len, wmm_params))
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return;
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wpa_printf(MSG_DEBUG,
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"WMM AC: Valid WMM association, WMM AC is enabled");
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}
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void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s)
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{
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if (!wpa_s->wmm_ac_assoc_info)
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return;
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wmm_ac_deinit(wpa_s);
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wpa_printf(MSG_DEBUG, "WMM AC: WMM AC is disabled");
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}
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