WMM AC: Add basic ADDTS/DELTS sending functions
Add basic implementation for ADDTS and DELTS sending functions. wpas_wmm_ac_addts() will send ADDTS request public action, containing TSPEC (traffic stream specification) with the given params. wpas_wmm_ac_delts() will look for the saved tspec with the given tid, and send DELTS public action for it. (Handling of ADDTS response and actually configuring the admission control params will be added in following patches.) Signed-off-by: Moshe Benji <moshe.benji@intel.com> Signed-off-by: Eliad Peller <eliad@wizery.com>
This commit is contained in:
Eliad Peller
Jouni Malinen
parent
471cd6e10c
commit
674f6c073f
3 changed files with 487 additions and 0 deletions
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@ -10,12 +10,276 @@
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#include "includes.h"
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#include "utils/common.h"
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#include "utils/list.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 "bss.h"
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#include "driver_i.h"
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#include "wmm_ac.h"
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static const enum wmm_ac up_to_ac[8] = {
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WMM_AC_BK,
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WMM_AC_BE,
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WMM_AC_BE,
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WMM_AC_BK,
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WMM_AC_VI,
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WMM_AC_VI,
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WMM_AC_VO,
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WMM_AC_VO
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};
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static inline u8 wmm_ac_get_tsid(const struct wmm_tspec_element *tspec)
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{
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return (tspec->ts_info[0] >> 1) & 0x0f;
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}
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static int wmm_ac_send_addts_request(struct wpa_supplicant *wpa_s,
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const struct wmm_ac_addts_request *req)
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{
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struct wpabuf *buf;
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int ret;
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wpa_printf(MSG_DEBUG, "Sending ADDTS Request to " MACSTR,
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MAC2STR(req->address));
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/* category + action code + dialog token + status + sizeof(tspec) */
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buf = wpabuf_alloc(4 + sizeof(req->tspec));
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if (!buf) {
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wpa_printf(MSG_ERROR, "WMM AC: Allocation error");
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return -1;
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}
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wpabuf_put_u8(buf, WLAN_ACTION_WMM);
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wpabuf_put_u8(buf, WMM_ACTION_CODE_ADDTS_REQ);
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wpabuf_put_u8(buf, req->dialog_token);
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wpabuf_put_u8(buf, 0); /* status code */
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wpabuf_put_data(buf, &req->tspec, sizeof(req->tspec));
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ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, req->address,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0);
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if (ret) {
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wpa_printf(MSG_WARNING,
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"WMM AC: Failed to send ADDTS Request");
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}
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wpabuf_free(buf);
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return ret;
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}
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static int wmm_ac_send_delts(struct wpa_supplicant *wpa_s,
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const struct wmm_tspec_element *tspec,
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const u8 *address)
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{
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struct wpabuf *buf;
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int ret;
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/* category + action code + dialog token + status + sizeof(tspec) */
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buf = wpabuf_alloc(4 + sizeof(*tspec));
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if (!buf)
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return -1;
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wpa_printf(MSG_DEBUG, "Sending DELTS to " MACSTR, MAC2STR(address));
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/* category + action code + dialog token + status + sizeof(tspec) */
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wpabuf_put_u8(buf, WLAN_ACTION_WMM);
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wpabuf_put_u8(buf, WMM_ACTION_CODE_DELTS);
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wpabuf_put_u8(buf, 0); /* Dialog Token (not used) */
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wpabuf_put_u8(buf, 0); /* Status Code (not used) */
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wpabuf_put_data(buf, tspec, sizeof(*tspec));
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ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, address,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0);
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if (ret)
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wpa_printf(MSG_WARNING, "Failed to send DELTS frame");
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wpabuf_free(buf);
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return ret;
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}
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/* return the AC using the given TSPEC tid */
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static int wmm_ac_find_tsid(struct wpa_supplicant *wpa_s, u8 tsid,
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enum ts_dir_idx *dir)
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{
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int ac;
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enum ts_dir_idx idx;
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for (ac = 0; ac < WMM_AC_NUM; ac++) {
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for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
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if (wpa_s->tspecs[ac][idx] &&
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wmm_ac_get_tsid(wpa_s->tspecs[ac][idx]) == tsid) {
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if (dir)
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*dir = idx;
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return ac;
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}
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}
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}
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return -1;
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}
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static struct wmm_ac_addts_request *
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wmm_ac_build_addts_req(struct wpa_supplicant *wpa_s,
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const struct wmm_ac_ts_setup_params *params,
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const u8 *address)
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{
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struct wmm_ac_addts_request *addts_req;
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struct wmm_tspec_element *tspec;
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u8 ac = up_to_ac[params->user_priority];
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u8 uapsd = wpa_s->wmm_ac_assoc_info->ac_params[ac].uapsd;
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addts_req = os_zalloc(sizeof(*addts_req));
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if (!addts_req)
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return NULL;
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tspec = &addts_req->tspec;
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os_memcpy(addts_req->address, address, ETH_ALEN);
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/* The dialog token cannot be zero */
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if (++wpa_s->wmm_ac_last_dialog_token == 0)
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wpa_s->wmm_ac_last_dialog_token++;
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addts_req->dialog_token = wpa_s->wmm_ac_last_dialog_token;
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tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
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tspec->length = sizeof(*tspec) - 2; /* reduce eid and length */
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tspec->oui[0] = 0x00;
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tspec->oui[1] = 0x50;
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tspec->oui[2] = 0xf2;
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tspec->oui_type = WMM_OUI_TYPE;
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tspec->oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT;
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tspec->version = WMM_VERSION;
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tspec->ts_info[0] = params->tsid << 1;
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tspec->ts_info[0] |= params->direction << 5;
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tspec->ts_info[0] |= WMM_AC_ACCESS_POLICY_EDCA << 7;
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tspec->ts_info[1] = uapsd << 2;
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tspec->ts_info[1] |= params->user_priority << 3;
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tspec->ts_info[2] = 0;
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tspec->nominal_msdu_size = host_to_le16(params->nominal_msdu_size);
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if (params->fixed_nominal_msdu)
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tspec->nominal_msdu_size |=
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host_to_le16(WMM_AC_FIXED_MSDU_SIZE);
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tspec->mean_data_rate = host_to_le32(params->mean_data_rate);
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tspec->minimum_phy_rate = host_to_le32(params->minimum_phy_rate);
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tspec->surplus_bandwidth_allowance =
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host_to_le16(params->surplus_bandwidth_allowance);
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return addts_req;
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}
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static int param_in_range(const char *name, long value,
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long min_val, long max_val)
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{
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if (value < min_val || (max_val >= 0 && value > max_val)) {
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wpa_printf(MSG_DEBUG,
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"WMM AC: param %s (%ld) is out of range (%ld-%ld)",
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name, value, min_val, max_val);
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return 0;
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}
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return 1;
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}
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static int wmm_ac_should_replace_ts(struct wpa_supplicant *wpa_s,
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u8 tsid, u8 ac, u8 dir)
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{
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enum ts_dir_idx idx;
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int cur_ac, existing_ts = 0, replace_ts = 0;
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cur_ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
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if (cur_ac >= 0) {
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if (cur_ac != ac) {
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wpa_printf(MSG_DEBUG,
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"WMM AC: TSID %i already exists on different ac (%d)",
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tsid, cur_ac);
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return -1;
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}
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/* same tsid - this tspec will replace the current one */
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replace_ts |= BIT(idx);
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}
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for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
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if (wpa_s->tspecs[ac][idx])
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existing_ts |= BIT(idx);
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}
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switch (dir) {
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case WMM_AC_DIR_UPLINK:
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/* replace existing uplink/bidi tspecs */
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replace_ts |= existing_ts & (BIT(TS_DIR_IDX_UPLINK) |
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BIT(TS_DIR_IDX_BIDI));
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break;
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case WMM_AC_DIR_DOWNLINK:
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/* replace existing downlink/bidi tspecs */
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replace_ts |= existing_ts & (BIT(TS_DIR_IDX_DOWNLINK) |
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BIT(TS_DIR_IDX_BIDI));
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break;
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case WMM_AC_DIR_BIDIRECTIONAL:
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/* replace all existing tspecs */
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replace_ts |= existing_ts;
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break;
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default:
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return -1;
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}
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return replace_ts;
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}
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static int wmm_ac_ts_req_is_valid(struct wpa_supplicant *wpa_s,
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const struct wmm_ac_ts_setup_params *params)
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{
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enum wmm_ac req_ac;
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#define PARAM_IN_RANGE(field, min_value, max_value) \
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param_in_range(#field, params->field, min_value, max_value)
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if (!PARAM_IN_RANGE(tsid, 0, WMM_AC_MAX_TID) ||
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!PARAM_IN_RANGE(user_priority, 0, WMM_AC_MAX_USER_PRIORITY) ||
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!PARAM_IN_RANGE(nominal_msdu_size, 1, WMM_AC_MAX_NOMINAL_MSDU) ||
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!PARAM_IN_RANGE(mean_data_rate, 1, -1) ||
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!PARAM_IN_RANGE(minimum_phy_rate, 1, -1) ||
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!PARAM_IN_RANGE(surplus_bandwidth_allowance, WMM_AC_MIN_SBA_UNITY,
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-1))
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return 0;
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#undef PARAM_IN_RANGE
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if (!(params->direction == WMM_TSPEC_DIRECTION_UPLINK ||
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params->direction == WMM_TSPEC_DIRECTION_DOWNLINK ||
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params->direction == WMM_TSPEC_DIRECTION_BI_DIRECTIONAL)) {
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wpa_printf(MSG_DEBUG, "WMM AC: invalid TS direction: %d",
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params->direction);
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return 0;
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}
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req_ac = up_to_ac[params->user_priority];
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/* Requested accesss category must have acm */
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if (!wpa_s->wmm_ac_assoc_info->ac_params[req_ac].acm) {
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wpa_printf(MSG_DEBUG, "WMM AC: AC %d is not ACM", req_ac);
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return 0;
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}
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if (wmm_ac_should_replace_ts(wpa_s, params->tsid, req_ac,
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params->direction) < 0)
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return 0;
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return 1;
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}
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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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@ -83,6 +347,9 @@ static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
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return -1;
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}
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os_memset(wpa_s->tspecs, 0, sizeof(wpa_s->tspecs));
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wpa_s->wmm_ac_last_dialog_token = 0;
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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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@ -100,8 +367,30 @@ static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
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}
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static void wmm_ac_del_ts(struct wpa_supplicant *wpa_s, u8 ac, int dir_bitmap)
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{
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enum ts_dir_idx idx;
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for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
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if (!(dir_bitmap & BIT(idx)))
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continue;
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if (!wpa_s->tspecs[ac][idx])
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continue;
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os_free(wpa_s->tspecs[ac][idx]);
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wpa_s->tspecs[ac][idx] = NULL;
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}
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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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int i;
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for (i = 0; i < WMM_AC_NUM; i++)
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wmm_ac_del_ts(wpa_s, i, TS_DIR_IDX_ALL);
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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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@ -126,3 +415,80 @@ void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s)
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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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int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid)
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{
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struct wmm_tspec_element *tspec;
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int ac;
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enum ts_dir_idx dir;
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if (!wpa_s->wmm_ac_assoc_info) {
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wpa_printf(MSG_DEBUG,
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"WMM AC: Failed to delete TS, WMM AC is disabled");
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return -1;
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}
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ac = wmm_ac_find_tsid(wpa_s, tsid, &dir);
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if (ac < 0) {
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wpa_printf(MSG_DEBUG, "WMM AC: TS does not exist");
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return -1;
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}
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tspec = wpa_s->tspecs[ac][dir];
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wmm_ac_send_delts(wpa_s, tspec, wpa_s->bssid);
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os_free(tspec);
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wpa_s->tspecs[ac][dir] = NULL;
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wpa_printf(MSG_DEBUG, "WMM AC: TS was deleted (TSID=%u addr=" MACSTR
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")", tsid, MAC2STR(wpa_s->bssid));
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return 0;
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}
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int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
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struct wmm_ac_ts_setup_params *params)
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{
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struct wmm_ac_addts_request *addts_req;
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if (!wpa_s->wmm_ac_assoc_info) {
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wpa_printf(MSG_DEBUG,
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"WMM AC: Cannot add TS - missing assoc data");
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return -1;
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}
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/*
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* we can setup downlink TS even without driver support.
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* however, we need driver support for the other directions.
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*/
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if (params->direction != WMM_AC_DIR_DOWNLINK &&
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!wpa_s->wmm_ac_supported) {
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wpa_printf(MSG_DEBUG,
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"Cannot set uplink/bidi TS without driver support");
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return -1;
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}
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if (!wmm_ac_ts_req_is_valid(wpa_s, params))
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return -1;
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wpa_printf(MSG_DEBUG, "WMM AC: TS setup request (addr=" MACSTR
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" tsid=%u user priority=%u direction=%d)",
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MAC2STR(wpa_s->bssid), params->tsid,
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params->user_priority, params->direction);
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addts_req = wmm_ac_build_addts_req(wpa_s, params, wpa_s->bssid);
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if (!addts_req)
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return -1;
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if (wmm_ac_send_addts_request(wpa_s, addts_req))
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goto err;
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/* TODO: wait for ADDTS response, etc. */
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os_free(addts_req);
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return 0;
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err:
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os_free(addts_req);
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return -1;
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}
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@ -15,6 +15,14 @@
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struct wpa_supplicant;
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#define WMM_AC_ACCESS_POLICY_EDCA 1
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#define WMM_AC_FIXED_MSDU_SIZE BIT(15)
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#define WMM_AC_MAX_TID 7
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#define WMM_AC_MAX_USER_PRIORITY 7
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#define WMM_AC_MIN_SBA_UNITY 0x2000
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#define WMM_AC_MAX_NOMINAL_MSDU 32767
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/**
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* struct wmm_ac_assoc_data - WMM Admission Control Association Data
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*
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@ -44,8 +52,119 @@ struct wmm_ac_assoc_data {
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} ac_params[WMM_AC_NUM];
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};
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/**
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* wmm_ac_dir - WMM Admission Control Direction
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*/
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enum wmm_ac_dir {
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WMM_AC_DIR_UPLINK = 0,
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WMM_AC_DIR_DOWNLINK = 1,
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WMM_AC_DIR_BIDIRECTIONAL = 3
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};
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/**
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* ts_dir_idx - indices of internally saved tspecs
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*
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* we can have multiple tspecs (downlink + uplink) per ac.
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* save them in array, and use the enum to directly access
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* the respective tspec slot (according to the direction).
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*/
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enum ts_dir_idx {
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TS_DIR_IDX_UPLINK,
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TS_DIR_IDX_DOWNLINK,
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||||
TS_DIR_IDX_BIDI,
|
||||
|
||||
TS_DIR_IDX_COUNT
|
||||
};
|
||||
#define TS_DIR_IDX_ALL (BIT(TS_DIR_IDX_COUNT) - 1)
|
||||
|
||||
/**
|
||||
* struct wmm_ac_addts_request - ADDTS Request Information
|
||||
*
|
||||
* The last sent ADDTS request(s) will be saved as element(s) of this struct in
|
||||
* order to be compared with the received ADDTS response in ADDTS response
|
||||
* action frame handling and should be stored until that point.
|
||||
* In case a new traffic stream will be created/replaced/updated, only its
|
||||
* relevant traffic stream information will be stored as a wmm_ac_ts struct.
|
||||
*/
|
||||
struct wmm_ac_addts_request {
|
||||
/*
|
||||
* dialog token - Used to link the recived ADDTS response with this
|
||||
* saved ADDTS request when ADDTS response is being handled
|
||||
*/
|
||||
u8 dialog_token;
|
||||
|
||||
/*
|
||||
* address - The alleged traffic stream's receiver/transmitter address
|
||||
* Address and TID are used to identify the TS (TID is contained in
|
||||
* TSPEC)
|
||||
*/
|
||||
u8 address[ETH_ALEN];
|
||||
|
||||
/*
|
||||
* tspec - Traffic Stream Specification, will be used to compare the
|
||||
* sent TSPEC in ADDTS request to the received TSPEC in ADDTS response
|
||||
* and act accordingly in ADDTS response handling
|
||||
*/
|
||||
struct wmm_tspec_element tspec;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* struct wmm_ac_ts_setup_params - TS setup parameters
|
||||
*
|
||||
* This struct holds parameters which should be provided
|
||||
* to wmm_ac_ts_setup in order to setup a traffic stream
|
||||
*/
|
||||
struct wmm_ac_ts_setup_params {
|
||||
/*
|
||||
* tsid - Traffic ID
|
||||
* TID and address are used to identify the TS
|
||||
*/
|
||||
int tsid;
|
||||
|
||||
/*
|
||||
* direction - Traffic Stream's direction
|
||||
*/
|
||||
enum wmm_ac_dir direction;
|
||||
|
||||
/*
|
||||
* user_priority - Traffic Stream's user priority
|
||||
*/
|
||||
int user_priority;
|
||||
|
||||
/*
|
||||
* nominal_msdu_size - Nominal MAC service data unit size
|
||||
*/
|
||||
int nominal_msdu_size;
|
||||
|
||||
/*
|
||||
* fixed_nominal_msdu - Whether the size is fixed
|
||||
* 0 = Nominal MSDU size is not fixed
|
||||
* 1 = Nominal MSDU size is fixed
|
||||
*/
|
||||
int fixed_nominal_msdu;
|
||||
|
||||
/*
|
||||
* surplus_bandwidth_allowance - Specifies excess time allocation
|
||||
*/
|
||||
int mean_data_rate;
|
||||
|
||||
/*
|
||||
* minimum_phy_rate - Specifies the minimum supported PHY rate in bps
|
||||
*/
|
||||
int minimum_phy_rate;
|
||||
|
||||
/*
|
||||
* surplus_bandwidth_allowance - Specifies excess time allocation
|
||||
*/
|
||||
int surplus_bandwidth_allowance;
|
||||
};
|
||||
|
||||
void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
|
||||
size_t ies_len, const struct wmm_params *wmm_params);
|
||||
void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s);
|
||||
int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
|
||||
struct wmm_ac_ts_setup_params *params);
|
||||
int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid);
|
||||
|
||||
#endif /* WMM_AC_H */
|
||||
|
|
|
|||
|
|
@ -892,6 +892,8 @@ struct wpa_supplicant {
|
|||
#endif /* CONFIG_TESTING_OPTIONS */
|
||||
|
||||
struct wmm_ac_assoc_data *wmm_ac_assoc_info;
|
||||
struct wmm_tspec_element *tspecs[WMM_AC_NUM][TS_DIR_IDX_COUNT];
|
||||
u8 wmm_ac_last_dialog_token;
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue