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-rw-r--r--wpa_supplicant/wmm_ac.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/wpa_supplicant/wmm_ac.c b/wpa_supplicant/wmm_ac.c
new file mode 100644
index 0000000..13bf7a3
--- /dev/null
+++ b/wpa_supplicant/wmm_ac.c
@@ -0,0 +1,128 @@
+/*
+ * Wi-Fi Multimedia Admission Control (WMM-AC)
+ * Copyright(c) 2014, Intel Mobile Communication GmbH.
+ * Copyright(c) 2014, Intel Corporation. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+
+#include "utils/common.h"
+#include "common/ieee802_11_common.h"
+#include "wpa_supplicant_i.h"
+#include "driver_i.h"
+#include "wmm_ac.h"
+
+
+static struct wmm_ac_assoc_data *
+wmm_ac_process_param_elem(struct wpa_supplicant *wpa_s, const u8 *ies,
+ size_t ies_len)
+{
+ struct ieee802_11_elems elems;
+ struct wmm_parameter_element *wmm_params;
+ struct wmm_ac_assoc_data *assoc_data;
+ int i;
+
+ /* Parsing WMM Parameter Element */
+ if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) != ParseOK) {
+ wpa_printf(MSG_DEBUG, "WMM AC: could not parse assoc ies");
+ return NULL;
+ }
+
+ if (!elems.wmm) {
+ wpa_printf(MSG_DEBUG, "WMM AC: No WMM IE");
+ return NULL;
+ }
+
+ if (elems.wmm_len != sizeof(*wmm_params)) {
+ wpa_printf(MSG_WARNING, "WMM AC: Invalid WMM ie length");
+ return NULL;
+ }
+
+ wmm_params = (struct wmm_parameter_element *)(elems.wmm);
+
+ assoc_data = os_zalloc(sizeof(*assoc_data));
+ if (!assoc_data)
+ return NULL;
+
+ for (i = 0; i < WMM_AC_NUM; i++)
+ assoc_data->ac_params[i].acm =
+ !!(wmm_params->ac[i].aci_aifsn & WMM_AC_ACM);
+
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: AC mandatory: AC_BE=%u AC_BK=%u AC_VI=%u AC_VO=%u",
+ assoc_data->ac_params[WMM_AC_BE].acm,
+ assoc_data->ac_params[WMM_AC_BK].acm,
+ assoc_data->ac_params[WMM_AC_VI].acm,
+ assoc_data->ac_params[WMM_AC_VO].acm);
+
+ return assoc_data;
+}
+
+
+static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
+ size_t ies_len, const struct wmm_params *wmm_params)
+{
+ struct wmm_ac_assoc_data *assoc_data;
+ u8 ac;
+
+ if (wpa_s->wmm_ac_assoc_info) {
+ wpa_printf(MSG_ERROR, "WMM AC: Already initialized");
+ return -1;
+ }
+
+ if (!ies) {
+ wpa_printf(MSG_ERROR, "WMM AC: Missing IEs");
+ return -1;
+ }
+
+ if (!(wmm_params->info_bitmap & WMM_PARAMS_UAPSD_QUEUES_INFO)) {
+ wpa_printf(MSG_DEBUG, "WMM AC: Missing U-APSD configuration");
+ return -1;
+ }
+
+ assoc_data = wmm_ac_process_param_elem(wpa_s, ies, ies_len);
+ if (!assoc_data)
+ return -1;
+
+ wpa_printf(MSG_DEBUG, "WMM AC: U-APSD queues=0x%x",
+ wmm_params->uapsd_queues);
+
+ for (ac = 0; ac < WMM_AC_NUM; ac++) {
+ assoc_data->ac_params[ac].uapsd =
+ !!(wmm_params->uapsd_queues & BIT(ac));
+ }
+
+ wpa_s->wmm_ac_assoc_info = assoc_data;
+ return 0;
+}
+
+
+static void wmm_ac_deinit(struct wpa_supplicant *wpa_s)
+{
+ os_free(wpa_s->wmm_ac_assoc_info);
+ wpa_s->wmm_ac_assoc_info = NULL;
+}
+
+
+void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
+ size_t ies_len, const struct wmm_params *wmm_params)
+{
+ if (wmm_ac_init(wpa_s, ies, ies_len, wmm_params))
+ return;
+
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Valid WMM association, WMM AC is enabled");
+}
+
+
+void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s)
+{
+ if (!wpa_s->wmm_ac_assoc_info)
+ return;
+
+ wmm_ac_deinit(wpa_s);
+ wpa_printf(MSG_DEBUG, "WMM AC: WMM AC is disabled");
+}