--- /dev/null
+/*
+ * 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 "utils/list.h"
+#include "utils/eloop.h"
+#include "common/ieee802_11_common.h"
+#include "wpa_supplicant_i.h"
+#include "bss.h"
+#include "driver_i.h"
+#include "wmm_ac.h"
+
+static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx);
+
+static const enum wmm_ac up_to_ac[8] = {
+ WMM_AC_BK,
+ WMM_AC_BE,
+ WMM_AC_BE,
+ WMM_AC_BK,
+ WMM_AC_VI,
+ WMM_AC_VI,
+ WMM_AC_VO,
+ WMM_AC_VO
+};
+
+
+static inline u8 wmm_ac_get_tsid(const struct wmm_tspec_element *tspec)
+{
+ return (tspec->ts_info[0] >> 1) & 0x0f;
+}
+
+
+static u8 wmm_ac_get_direction(const struct wmm_tspec_element *tspec)
+{
+ return (tspec->ts_info[0] >> 5) & 0x03;
+}
+
+
+static u8 wmm_ac_get_user_priority(const struct wmm_tspec_element *tspec)
+{
+ return (tspec->ts_info[1] >> 3) & 0x07;
+}
+
+
+static u8 wmm_ac_direction_to_idx(u8 direction)
+{
+ switch (direction) {
+ case WMM_AC_DIR_UPLINK:
+ return TS_DIR_IDX_UPLINK;
+ case WMM_AC_DIR_DOWNLINK:
+ return TS_DIR_IDX_DOWNLINK;
+ case WMM_AC_DIR_BIDIRECTIONAL:
+ return TS_DIR_IDX_BIDI;
+ default:
+ wpa_printf(MSG_ERROR, "Invalid direction: %d", direction);
+ return WMM_AC_DIR_UPLINK;
+ }
+}
+
+
+static int wmm_ac_add_ts(struct wpa_supplicant *wpa_s, const u8 *addr,
+ const struct wmm_tspec_element *tspec)
+{
+ struct wmm_tspec_element *_tspec;
+ int ret;
+ u16 admitted_time = le_to_host16(tspec->medium_time);
+ u8 up = wmm_ac_get_user_priority(tspec);
+ u8 ac = up_to_ac[up];
+ u8 dir = wmm_ac_get_direction(tspec);
+ u8 tsid = wmm_ac_get_tsid(tspec);
+ enum ts_dir_idx idx = wmm_ac_direction_to_idx(dir);
+
+ /* should have been verified before, but double-check here */
+ if (wpa_s->tspecs[ac][idx]) {
+ wpa_printf(MSG_ERROR,
+ "WMM AC: tspec (ac=%d, dir=%d) already exists!",
+ ac, dir);
+ return -1;
+ }
+
+ /* copy tspec */
+ _tspec = os_malloc(sizeof(*_tspec));
+ if (!_tspec)
+ return -1;
+
+ /* store the admitted TSPEC */
+ os_memcpy(_tspec, tspec, sizeof(*_tspec));
+
+ if (dir != WMM_AC_DIR_DOWNLINK) {
+ ret = wpa_drv_add_ts(wpa_s, tsid, addr, up, admitted_time);
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Add TS: addr=" MACSTR
+ " TSID=%u admitted time=%u, ret=%d",
+ MAC2STR(addr), tsid, admitted_time, ret);
+ if (ret < 0) {
+ os_free(_tspec);
+ return -1;
+ }
+ }
+
+ wpa_s->tspecs[ac][idx] = _tspec;
+
+ wpa_printf(MSG_DEBUG, "Traffic stream was created successfully");
+
+ wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_ADDED
+ "tsid=%d addr=" MACSTR " admitted_time=%d",
+ tsid, MAC2STR(addr), admitted_time);
+
+ return 0;
+}
+
+
+static void wmm_ac_del_ts_idx(struct wpa_supplicant *wpa_s, u8 ac,
+ enum ts_dir_idx dir)
+{
+ struct wmm_tspec_element *tspec = wpa_s->tspecs[ac][dir];
+ u8 tsid;
+
+ if (!tspec)
+ return;
+
+ tsid = wmm_ac_get_tsid(tspec);
+ wpa_printf(MSG_DEBUG, "WMM AC: Del TS ac=%d tsid=%d", ac, tsid);
+
+ /* update the driver in case of uplink/bidi */
+ if (wmm_ac_get_direction(tspec) != WMM_AC_DIR_DOWNLINK)
+ wpa_drv_del_ts(wpa_s, tsid, wpa_s->bssid);
+
+ wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REMOVED
+ "tsid=%d addr=" MACSTR, tsid, MAC2STR(wpa_s->bssid));
+
+ os_free(wpa_s->tspecs[ac][dir]);
+ wpa_s->tspecs[ac][dir] = NULL;
+}
+
+
+static void wmm_ac_del_req(struct wpa_supplicant *wpa_s, int failed)
+{
+ struct wmm_ac_addts_request *req = wpa_s->addts_request;
+
+ if (!req)
+ return;
+
+ if (failed)
+ wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED
+ "tsid=%u", wmm_ac_get_tsid(&req->tspec));
+
+ eloop_cancel_timeout(wmm_ac_addts_req_timeout, wpa_s, req);
+ wpa_s->addts_request = NULL;
+ os_free(req);
+}
+
+
+static void wmm_ac_addts_req_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+ struct wpa_supplicant *wpa_s = eloop_ctx;
+ struct wmm_ac_addts_request *addts_req = timeout_ctx;
+
+ wpa_printf(MSG_DEBUG,
+ "Timeout getting ADDTS response (tsid=%d up=%d)",
+ wmm_ac_get_tsid(&addts_req->tspec),
+ wmm_ac_get_user_priority(&addts_req->tspec));
+
+ wmm_ac_del_req(wpa_s, 1);
+}
+
+
+static int wmm_ac_send_addts_request(struct wpa_supplicant *wpa_s,
+ const struct wmm_ac_addts_request *req)
+{
+ struct wpabuf *buf;
+ int ret;
+
+ wpa_printf(MSG_DEBUG, "Sending ADDTS Request to " MACSTR,
+ MAC2STR(req->address));
+
+ /* category + action code + dialog token + status + sizeof(tspec) */
+ buf = wpabuf_alloc(4 + sizeof(req->tspec));
+ if (!buf) {
+ wpa_printf(MSG_ERROR, "WMM AC: Allocation error");
+ return -1;
+ }
+
+ wpabuf_put_u8(buf, WLAN_ACTION_WMM);
+ wpabuf_put_u8(buf, WMM_ACTION_CODE_ADDTS_REQ);
+ wpabuf_put_u8(buf, req->dialog_token);
+ wpabuf_put_u8(buf, 0); /* status code */
+ wpabuf_put_data(buf, &req->tspec, sizeof(req->tspec));
+
+ ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, req->address,
+ wpa_s->own_addr, wpa_s->bssid,
+ wpabuf_head(buf), wpabuf_len(buf), 0);
+ if (ret) {
+ wpa_printf(MSG_WARNING,
+ "WMM AC: Failed to send ADDTS Request");
+ }
+
+ wpabuf_free(buf);
+ return ret;
+}
+
+
+static int wmm_ac_send_delts(struct wpa_supplicant *wpa_s,
+ const struct wmm_tspec_element *tspec,
+ const u8 *address)
+{
+ struct wpabuf *buf;
+ int ret;
+
+ /* category + action code + dialog token + status + sizeof(tspec) */
+ buf = wpabuf_alloc(4 + sizeof(*tspec));
+ if (!buf)
+ return -1;
+
+ wpa_printf(MSG_DEBUG, "Sending DELTS to " MACSTR, MAC2STR(address));
+
+ /* category + action code + dialog token + status + sizeof(tspec) */
+ wpabuf_put_u8(buf, WLAN_ACTION_WMM);
+ wpabuf_put_u8(buf, WMM_ACTION_CODE_DELTS);
+ wpabuf_put_u8(buf, 0); /* Dialog Token (not used) */
+ wpabuf_put_u8(buf, 0); /* Status Code (not used) */
+ wpabuf_put_data(buf, tspec, sizeof(*tspec));
+
+ ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, address,
+ wpa_s->own_addr, wpa_s->bssid,
+ wpabuf_head(buf), wpabuf_len(buf), 0);
+ if (ret)
+ wpa_printf(MSG_WARNING, "Failed to send DELTS frame");
+
+ wpabuf_free(buf);
+ return ret;
+}
+
+
+/* return the AC using the given TSPEC tid */
+static int wmm_ac_find_tsid(struct wpa_supplicant *wpa_s, u8 tsid,
+ enum ts_dir_idx *dir)
+{
+ int ac;
+ enum ts_dir_idx idx;
+
+ for (ac = 0; ac < WMM_AC_NUM; ac++) {
+ for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
+ if (wpa_s->tspecs[ac][idx] &&
+ wmm_ac_get_tsid(wpa_s->tspecs[ac][idx]) == tsid) {
+ if (dir)
+ *dir = idx;
+ return ac;
+ }
+ }
+ }
+
+ return -1;
+}
+
+
+static struct wmm_ac_addts_request *
+wmm_ac_build_addts_req(struct wpa_supplicant *wpa_s,
+ const struct wmm_ac_ts_setup_params *params,
+ const u8 *address)
+{
+ struct wmm_ac_addts_request *addts_req;
+ struct wmm_tspec_element *tspec;
+ u8 ac = up_to_ac[params->user_priority];
+ u8 uapsd = wpa_s->wmm_ac_assoc_info->ac_params[ac].uapsd;
+
+ addts_req = os_zalloc(sizeof(*addts_req));
+ if (!addts_req)
+ return NULL;
+
+ tspec = &addts_req->tspec;
+ os_memcpy(addts_req->address, address, ETH_ALEN);
+
+ /* The dialog token cannot be zero */
+ if (++wpa_s->wmm_ac_last_dialog_token == 0)
+ wpa_s->wmm_ac_last_dialog_token++;
+
+ addts_req->dialog_token = wpa_s->wmm_ac_last_dialog_token;
+ tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
+ tspec->length = sizeof(*tspec) - 2; /* reduce eid and length */
+ tspec->oui[0] = 0x00;
+ tspec->oui[1] = 0x50;
+ tspec->oui[2] = 0xf2;
+ tspec->oui_type = WMM_OUI_TYPE;
+ tspec->oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT;
+ tspec->version = WMM_VERSION;
+
+ tspec->ts_info[0] = params->tsid << 1;
+ tspec->ts_info[0] |= params->direction << 5;
+ tspec->ts_info[0] |= WMM_AC_ACCESS_POLICY_EDCA << 7;
+ tspec->ts_info[1] = uapsd << 2;
+ tspec->ts_info[1] |= params->user_priority << 3;
+ tspec->ts_info[2] = 0;
+
+ tspec->nominal_msdu_size = host_to_le16(params->nominal_msdu_size);
+ if (params->fixed_nominal_msdu)
+ tspec->nominal_msdu_size |=
+ host_to_le16(WMM_AC_FIXED_MSDU_SIZE);
+
+ tspec->mean_data_rate = host_to_le32(params->mean_data_rate);
+ tspec->minimum_phy_rate = host_to_le32(params->minimum_phy_rate);
+ tspec->surplus_bandwidth_allowance =
+ host_to_le16(params->surplus_bandwidth_allowance);
+
+ return addts_req;
+}
+
+
+static int param_in_range(const char *name, long value,
+ long min_val, long max_val)
+{
+ if (value < min_val || (max_val >= 0 && value > max_val)) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: param %s (%ld) is out of range (%ld-%ld)",
+ name, value, min_val, max_val);
+ return 0;
+ }
+
+ return 1;
+}
+
+
+static int wmm_ac_should_replace_ts(struct wpa_supplicant *wpa_s,
+ u8 tsid, u8 ac, u8 dir)
+{
+ enum ts_dir_idx idx;
+ int cur_ac, existing_ts = 0, replace_ts = 0;
+
+ cur_ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
+ if (cur_ac >= 0) {
+ if (cur_ac != ac) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: TSID %i already exists on different ac (%d)",
+ tsid, cur_ac);
+ return -1;
+ }
+
+ /* same tsid - this tspec will replace the current one */
+ replace_ts |= BIT(idx);
+ }
+
+ for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
+ if (wpa_s->tspecs[ac][idx])
+ existing_ts |= BIT(idx);
+ }
+
+ switch (dir) {
+ case WMM_AC_DIR_UPLINK:
+ /* replace existing uplink/bidi tspecs */
+ replace_ts |= existing_ts & (BIT(TS_DIR_IDX_UPLINK) |
+ BIT(TS_DIR_IDX_BIDI));
+ break;
+ case WMM_AC_DIR_DOWNLINK:
+ /* replace existing downlink/bidi tspecs */
+ replace_ts |= existing_ts & (BIT(TS_DIR_IDX_DOWNLINK) |
+ BIT(TS_DIR_IDX_BIDI));
+ break;
+ case WMM_AC_DIR_BIDIRECTIONAL:
+ /* replace all existing tspecs */
+ replace_ts |= existing_ts;
+ break;
+ default:
+ return -1;
+ }
+
+ return replace_ts;
+}
+
+
+static int wmm_ac_ts_req_is_valid(struct wpa_supplicant *wpa_s,
+ const struct wmm_ac_ts_setup_params *params)
+{
+ enum wmm_ac req_ac;
+
+#define PARAM_IN_RANGE(field, min_value, max_value) \
+ param_in_range(#field, params->field, min_value, max_value)
+
+ if (!PARAM_IN_RANGE(tsid, 0, WMM_AC_MAX_TID) ||
+ !PARAM_IN_RANGE(user_priority, 0, WMM_AC_MAX_USER_PRIORITY) ||
+ !PARAM_IN_RANGE(nominal_msdu_size, 1, WMM_AC_MAX_NOMINAL_MSDU) ||
+ !PARAM_IN_RANGE(mean_data_rate, 1, -1) ||
+ !PARAM_IN_RANGE(minimum_phy_rate, 1, -1) ||
+ !PARAM_IN_RANGE(surplus_bandwidth_allowance, WMM_AC_MIN_SBA_UNITY,
+ -1))
+ return 0;
+#undef PARAM_IN_RANGE
+
+ if (!(params->direction == WMM_TSPEC_DIRECTION_UPLINK ||
+ params->direction == WMM_TSPEC_DIRECTION_DOWNLINK ||
+ params->direction == WMM_TSPEC_DIRECTION_BI_DIRECTIONAL)) {
+ wpa_printf(MSG_DEBUG, "WMM AC: invalid TS direction: %d",
+ params->direction);
+ return 0;
+ }
+
+ req_ac = up_to_ac[params->user_priority];
+
+ /* Requested accesss category must have acm */
+ if (!wpa_s->wmm_ac_assoc_info->ac_params[req_ac].acm) {
+ wpa_printf(MSG_DEBUG, "WMM AC: AC %d is not ACM", req_ac);
+ return 0;
+ }
+
+ if (wmm_ac_should_replace_ts(wpa_s, params->tsid, req_ac,
+ params->direction) < 0)
+ return 0;
+
+ return 1;
+}
+
+
+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) == ParseFailed) {
+ 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_DEBUG, "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;
+ }
+
+ os_memset(wpa_s->tspecs, 0, sizeof(wpa_s->tspecs));
+ wpa_s->wmm_ac_last_dialog_token = 0;
+ wpa_s->addts_request = NULL;
+
+ 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_del_ts(struct wpa_supplicant *wpa_s, u8 ac, int dir_bitmap)
+{
+ enum ts_dir_idx idx;
+
+ for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
+ if (!(dir_bitmap & BIT(idx)))
+ continue;
+
+ wmm_ac_del_ts_idx(wpa_s, ac, idx);
+ }
+}
+
+
+static void wmm_ac_deinit(struct wpa_supplicant *wpa_s)
+{
+ int i;
+
+ for (i = 0; i < WMM_AC_NUM; i++)
+ wmm_ac_del_ts(wpa_s, i, TS_DIR_IDX_ALL);
+
+ /* delete pending add_ts requset */
+ wmm_ac_del_req(wpa_s, 1);
+
+ 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");
+}
+
+
+int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid)
+{
+ struct wmm_tspec_element tspec;
+ int ac;
+ enum ts_dir_idx dir;
+
+ if (!wpa_s->wmm_ac_assoc_info) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Failed to delete TS, WMM AC is disabled");
+ return -1;
+ }
+
+ ac = wmm_ac_find_tsid(wpa_s, tsid, &dir);
+ if (ac < 0) {
+ wpa_printf(MSG_DEBUG, "WMM AC: TS does not exist");
+ return -1;
+ }
+
+ tspec = *wpa_s->tspecs[ac][dir];
+
+ wmm_ac_del_ts_idx(wpa_s, ac, dir);
+
+ wmm_ac_send_delts(wpa_s, &tspec, wpa_s->bssid);
+
+ return 0;
+}
+
+
+int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
+ struct wmm_ac_ts_setup_params *params)
+{
+ struct wmm_ac_addts_request *addts_req;
+
+ if (!wpa_s->wmm_ac_assoc_info) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Cannot add TS - missing assoc data");
+ return -1;
+ }
+
+ if (wpa_s->addts_request) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: can't add TS - ADDTS request is already pending");
+ return -1;
+ }
+
+ /*
+ * we can setup downlink TS even without driver support.
+ * however, we need driver support for the other directions.
+ */
+ if (params->direction != WMM_AC_DIR_DOWNLINK &&
+ !wpa_s->wmm_ac_supported) {
+ wpa_printf(MSG_DEBUG,
+ "Cannot set uplink/bidi TS without driver support");
+ return -1;
+ }
+
+ if (!wmm_ac_ts_req_is_valid(wpa_s, params))
+ return -1;
+
+ wpa_printf(MSG_DEBUG, "WMM AC: TS setup request (addr=" MACSTR
+ " tsid=%u user priority=%u direction=%d)",
+ MAC2STR(wpa_s->bssid), params->tsid,
+ params->user_priority, params->direction);
+
+ addts_req = wmm_ac_build_addts_req(wpa_s, params, wpa_s->bssid);
+ if (!addts_req)
+ return -1;
+
+ if (wmm_ac_send_addts_request(wpa_s, addts_req))
+ goto err;
+
+ /* save as pending and set ADDTS resp timeout to 1 second */
+ wpa_s->addts_request = addts_req;
+ eloop_register_timeout(1, 0, wmm_ac_addts_req_timeout,
+ wpa_s, addts_req);
+ return 0;
+err:
+ os_free(addts_req);
+ return -1;
+}
+
+
+static void wmm_ac_handle_delts(struct wpa_supplicant *wpa_s, const u8 *sa,
+ const struct wmm_tspec_element *tspec)
+{
+ int ac;
+ u8 tsid;
+ enum ts_dir_idx idx;
+
+ tsid = wmm_ac_get_tsid(tspec);
+
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: DELTS frame has been received TSID=%u addr="
+ MACSTR, tsid, MAC2STR(sa));
+
+ ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
+ if (ac < 0) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Ignoring DELTS frame - TSID does not exist");
+ return;
+ }
+
+ wmm_ac_del_ts_idx(wpa_s, ac, idx);
+
+ wpa_printf(MSG_DEBUG,
+ "TS was deleted successfully (tsid=%u address=" MACSTR ")",
+ tsid, MAC2STR(sa));
+}
+
+
+static void wmm_ac_handle_addts_resp(struct wpa_supplicant *wpa_s, const u8 *sa,
+ const u8 resp_dialog_token, const u8 status_code,
+ const struct wmm_tspec_element *tspec)
+{
+ struct wmm_ac_addts_request *req = wpa_s->addts_request;
+ u8 ac, tsid, up, dir;
+ int replace_tspecs;
+
+ tsid = wmm_ac_get_tsid(tspec);
+ dir = wmm_ac_get_direction(tspec);
+ up = wmm_ac_get_user_priority(tspec);
+ ac = up_to_ac[up];
+
+ /* make sure we have a matching addts request */
+ if (!req || req->dialog_token != resp_dialog_token) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: no req with dialog=%u, ignoring frame",
+ resp_dialog_token);
+ return;
+ }
+
+ /* make sure the params are the same */
+ if (os_memcmp(req->address, sa, ETH_ALEN) != 0 ||
+ tsid != wmm_ac_get_tsid(&req->tspec) ||
+ up != wmm_ac_get_user_priority(&req->tspec) ||
+ dir != wmm_ac_get_direction(&req->tspec)) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: ADDTS params do not match, ignoring frame");
+ return;
+ }
+
+ /* delete pending request */
+ wmm_ac_del_req(wpa_s, 0);
+
+ wpa_printf(MSG_DEBUG,
+ "ADDTS response status=%d tsid=%u up=%u direction=%u",
+ status_code, tsid, up, dir);
+
+ if (status_code != WMM_ADDTS_STATUS_ADMISSION_ACCEPTED) {
+ wpa_printf(MSG_INFO, "WMM AC: ADDTS request was rejected");
+ goto err_msg;
+ }
+
+ replace_tspecs = wmm_ac_should_replace_ts(wpa_s, tsid, ac, dir);
+ if (replace_tspecs < 0)
+ goto err_delts;
+
+ wpa_printf(MSG_DEBUG, "ts idx replace bitmap: 0x%x", replace_tspecs);
+
+ /* when replacing tspecs - delete first */
+ wmm_ac_del_ts(wpa_s, ac, replace_tspecs);
+
+ /* Creating a new traffic stream */
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: adding a new TS with TSID=%u address="MACSTR
+ " medium time=%u access category=%d dir=%d ",
+ tsid, MAC2STR(sa),
+ le_to_host16(tspec->medium_time), ac, dir);
+
+ if (wmm_ac_add_ts(wpa_s, sa, tspec))
+ goto err_delts;
+
+ return;
+
+err_delts:
+ /* ask the ap to delete the tspec */
+ wmm_ac_send_delts(wpa_s, tspec, sa);
+err_msg:
+ wpa_msg(wpa_s, MSG_INFO, WMM_AC_EVENT_TSPEC_REQ_FAILED "tsid=%u",
+ tsid);
+}
+
+
+void wmm_ac_rx_action(struct wpa_supplicant *wpa_s, const u8 *da,
+ const u8 *sa, const u8 *data, size_t len)
+{
+ u8 action;
+ u8 dialog_token;
+ u8 status_code;
+ struct ieee802_11_elems elems;
+ struct wmm_tspec_element *tspec;
+
+ if (wpa_s->wmm_ac_assoc_info == NULL) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: WMM AC is disabled, ignoring action frame");
+ return;
+ }
+
+ action = data[0];
+
+ if (action != WMM_ACTION_CODE_ADDTS_RESP &&
+ action != WMM_ACTION_CODE_DELTS) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Unknown action (%d), ignoring action frame",
+ action);
+ return;
+ }
+
+ /* WMM AC action frame */
+ if (os_memcmp(da, wpa_s->own_addr, ETH_ALEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WMM AC: frame destination addr="MACSTR
+ " is other than ours, ignoring frame", MAC2STR(da));
+ return;
+ }
+
+ if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WMM AC: ignore frame with sa " MACSTR
+ " different other than our bssid", MAC2STR(da));
+ return;
+ }
+
+ if (len < 2 + sizeof(struct wmm_tspec_element)) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Short ADDTS response ignored (len=%lu)",
+ (unsigned long) len);
+ return;
+ }
+
+ data++;
+ len--;
+ dialog_token = data[0];
+ status_code = data[1];
+
+ if (ieee802_11_parse_elems(data + 2, len - 2, &elems, 1) != ParseOK) {
+ wpa_printf(MSG_DEBUG,
+ "WMM AC: Could not parse WMM AC action from " MACSTR,
+ MAC2STR(sa));
+ return;
+ }
+
+ /* the struct also contains the type and value, so decrease it */
+ if (elems.wmm_tspec_len != sizeof(struct wmm_tspec_element) - 2) {
+ wpa_printf(MSG_DEBUG, "WMM AC: missing or wrong length TSPEC");
+ return;
+ }
+
+ tspec = (struct wmm_tspec_element *)(elems.wmm_tspec - 2);
+
+ wpa_printf(MSG_DEBUG, "WMM AC: RX WMM AC Action from " MACSTR,
+ MAC2STR(sa));
+ wpa_hexdump(MSG_MSGDUMP, "WMM AC: WMM AC Action content", data, len);
+
+ switch (action) {
+ case WMM_ACTION_CODE_ADDTS_RESP:
+ wmm_ac_handle_addts_resp(wpa_s, sa, dialog_token, status_code,
+ tspec);
+ break;
+ case WMM_ACTION_CODE_DELTS:
+ wmm_ac_handle_delts(wpa_s, sa, tspec);
+ break;
+ default:
+ break;
+ }
+}
+
+
+static const char * get_ac_str(u8 ac)
+{
+ switch (ac) {
+ case WMM_AC_BE:
+ return "BE";
+ case WMM_AC_BK:
+ return "BK";
+ case WMM_AC_VI:
+ return "VI";
+ case WMM_AC_VO:
+ return "VO";
+ default:
+ return "N/A";
+ }
+}
+
+
+static const char * get_direction_str(u8 direction)
+{
+ switch (direction) {
+ case WMM_AC_DIR_DOWNLINK:
+ return "Downlink";
+ case WMM_AC_DIR_UPLINK:
+ return "Uplink";
+ case WMM_AC_DIR_BIDIRECTIONAL:
+ return "Bi-directional";
+ default:
+ return "N/A";
+ }
+}
+
+
+int wpas_wmm_ac_status(struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
+{
+ struct wmm_ac_assoc_data *assoc_info = wpa_s->wmm_ac_assoc_info;
+ enum ts_dir_idx idx;
+ int pos = 0;
+ u8 ac, up;
+
+ if (!assoc_info) {
+ return wpa_scnprintf(buf, buflen - pos,
+ "Not associated to a WMM AP, WMM AC is Disabled\n");
+ }
+
+ pos += wpa_scnprintf(buf + pos, buflen - pos, "WMM AC is Enabled\n");
+
+ for (ac = 0; ac < WMM_AC_NUM; ac++) {
+ int ts_count = 0;
+
+ pos += wpa_scnprintf(buf + pos, buflen - pos,
+ "%s: acm=%d uapsd=%d\n",
+ get_ac_str(ac),
+ assoc_info->ac_params[ac].acm,
+ assoc_info->ac_params[ac].uapsd);
+
+ for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
+ struct wmm_tspec_element *tspec;
+ u8 dir, tsid;
+ const char *dir_str;
+
+ tspec = wpa_s->tspecs[ac][idx];
+ if (!tspec)
+ continue;
+
+ ts_count++;
+
+ dir = wmm_ac_get_direction(tspec);
+ dir_str = get_direction_str(dir);
+ tsid = wmm_ac_get_tsid(tspec);
+ up = wmm_ac_get_user_priority(tspec);
+
+ pos += wpa_scnprintf(buf + pos, buflen - pos,
+ "\tTSID=%u UP=%u\n"
+ "\tAddress = "MACSTR"\n"
+ "\tWMM AC dir = %s\n"
+ "\tTotal admitted time = %u\n\n",
+ tsid, up,
+ MAC2STR(wpa_s->bssid),
+ dir_str,
+ le_to_host16(tspec->medium_time));
+ }
+
+ if (!ts_count) {
+ pos += wpa_scnprintf(buf + pos, buflen - pos,
+ "\t(No Traffic Stream)\n\n");
+ }
+ }
+
+ return pos;
+}
+
+
+static u8 wmm_ac_get_tspecs_count(struct wpa_supplicant *wpa_s)
+{
+ int ac, dir, tspecs_count = 0;
+
+ for (ac = 0; ac < WMM_AC_NUM; ac++) {
+ for (dir = 0; dir < TS_DIR_IDX_COUNT; dir++) {
+ if (wpa_s->tspecs[ac][dir])
+ tspecs_count++;
+ }
+ }
+
+ return tspecs_count;
+}
+
+
+void wmm_ac_save_tspecs(struct wpa_supplicant *wpa_s)
+{
+ int ac, dir, tspecs_count;
+
+ wpa_printf(MSG_DEBUG, "WMM AC: Save last configured tspecs");
+
+ if (!wpa_s->wmm_ac_assoc_info)
+ return;
+
+ tspecs_count = wmm_ac_get_tspecs_count(wpa_s);
+ if (!tspecs_count) {
+ wpa_printf(MSG_DEBUG, "WMM AC: No configured TSPECs");
+ return;
+ }
+
+ wpa_printf(MSG_DEBUG, "WMM AC: Saving tspecs");
+
+ wmm_ac_clear_saved_tspecs(wpa_s);
+ wpa_s->last_tspecs = os_calloc(tspecs_count,
+ sizeof(*wpa_s->last_tspecs));
+ if (!wpa_s->last_tspecs) {
+ wpa_printf(MSG_ERROR, "WMM AC: Failed to save tspecs!");
+ return;
+ }
+
+ for (ac = 0; ac < WMM_AC_NUM; ac++) {
+ for (dir = 0; dir < TS_DIR_IDX_COUNT; dir++) {
+ if (!wpa_s->tspecs[ac][dir])
+ continue;
+
+ wpa_s->last_tspecs[wpa_s->last_tspecs_count++] =
+ *wpa_s->tspecs[ac][dir];
+ }
+ }
+
+ wpa_printf(MSG_DEBUG, "WMM AC: Successfully saved %d TSPECs",
+ wpa_s->last_tspecs_count);
+}
+
+
+void wmm_ac_clear_saved_tspecs(struct wpa_supplicant *wpa_s)
+{
+ if (wpa_s->last_tspecs) {
+ wpa_printf(MSG_DEBUG, "WMM AC: Clear saved tspecs");
+ os_free(wpa_s->last_tspecs);
+ wpa_s->last_tspecs = NULL;
+ wpa_s->last_tspecs_count = 0;
+ }
+}
+
+
+int wmm_ac_restore_tspecs(struct wpa_supplicant *wpa_s)
+{
+ unsigned int i;
+
+ if (!wpa_s->wmm_ac_assoc_info || !wpa_s->last_tspecs_count)
+ return 0;
+
+ wpa_printf(MSG_DEBUG, "WMM AC: Restore %u saved tspecs",
+ wpa_s->last_tspecs_count);
+
+ for (i = 0; i < wpa_s->last_tspecs_count; i++)
+ wmm_ac_add_ts(wpa_s, wpa_s->bssid, &wpa_s->last_tspecs[i]);
+
+ return 0;
+}
projects / mech_eap.git / blobdiff