blob: d0fdd55d30fc29b6cbe1b2339dc59e0059691da1 [file] [log] [blame]
/*
* 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_memdup(tspec, sizeof(*_tspec));
if (!_tspec)
return -1;
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 access 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 || !(wmm_params->info_bitmap & WMM_PARAMS_UAPSD_QUEUES_INFO)) {
/* WMM AC not in use for this connection */
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 request */
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;
}