TWT: Support sending TWT Setup and Teardown Action frames
This adds new control interface commands TWT_SETUP and TWT_TEARDOWN. For now, these are only for testing purposes to be able to trigger transmission of the TWT Action frames without configuring any local behavior for TWT in the driver. Signed-off-by: Ben Greear <greearb@candelatech.com>master
Ben Greear
3 years ago
committed by
Jouni Malinen
parent
edbaffc4f6
commit
7fd2f24962
@ -0,0 +1,143 @@
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/*
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* wpa_supplicant - TWT
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* Copyright (c) 2003-2016, Jouni Malinen <j@w1.fi>
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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 "wpa_supplicant_i.h"
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#include "driver_i.h"
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#ifdef CONFIG_TESTING_OPTIONS
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/**
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* wpas_twt_send_setup - Send TWT Setup frame (Request) to our AP
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* @wpa_s: Pointer to wpa_supplicant
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* @dtok: Dialog token
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* @exponent: Wake-interval exponent
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* @mantissa: Wake-interval mantissa
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* @min_twt: Minimum TWT wake duration in units of 256 usec
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* @setup_cmd: 0 == request, 1 == suggest, etc. Table 9-297
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* Returns: 0 in case of success, negative error code otherwise
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*
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*/
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int wpas_twt_send_setup(struct wpa_supplicant *wpa_s, u8 dtok, int exponent,
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int mantissa, u8 min_twt, int setup_cmd, u64 twt,
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bool requestor, bool trigger, bool implicit,
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bool flow_type, u8 flow_id, bool protection,
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u8 twt_channel)
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{
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struct wpabuf *buf;
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u16 req_type = 0;
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int ret = 0;
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if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_ssid) {
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wpa_printf(MSG_DEBUG,
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"TWT: No connection - cannot send TWT Setup frame");
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return -ENOTCONN;
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}
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/* 3 = Action category + Action code + Dialog token */
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/* 17 = TWT element */
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buf = wpabuf_alloc(3 + 17);
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if (!buf) {
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wpa_printf(MSG_DEBUG,
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"TWT: Failed to allocate TWT Setup frame (Request)");
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return -ENOMEM;
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}
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wpa_printf(MSG_DEBUG,
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"TWT: Setup request, dtok: %d exponent: %d mantissa: %d min-twt: %d",
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dtok, exponent, mantissa, min_twt);
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wpabuf_put_u8(buf, WLAN_ACTION_S1G);
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wpabuf_put_u8(buf, S1G_ACT_TWT_SETUP);
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wpabuf_put_u8(buf, dtok);
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wpabuf_put_u8(buf, WLAN_EID_TWT);
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wpabuf_put_u8(buf, 15); /* len */
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wpabuf_put_u8(buf, BIT(4)); /* Control field:
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* B4 = TWT Information Frame Disabled */
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if (requestor)
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req_type |= BIT(0); /* This STA is a TWT Requesting STA */
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/* TWT Setup Command field */
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req_type |= (setup_cmd & 0x7) << 1;
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if (trigger)
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req_type |= BIT(4); /* TWT SP includes trigger frames */
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if (implicit)
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req_type |= BIT(5); /* Implicit TWT */
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if (flow_type)
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req_type |= BIT(6); /* Flow Type: Unannounced TWT */
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req_type |= (flow_id & 0x7) << 7;
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req_type |= (exponent & 0x1f) << 10; /* TWT Wake Interval Exponent */
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if (protection)
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req_type |= BIT(15);
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wpabuf_put_le16(buf, req_type);
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wpabuf_put_le64(buf, twt);
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wpabuf_put_u8(buf, min_twt); /* Nominal Minimum TWT Wake Duration */
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wpabuf_put_le16(buf, mantissa); /* TWT Wake Interval Mantissa */
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wpabuf_put_u8(buf, twt_channel); /* TWT Channel */
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if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
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wpa_printf(MSG_DEBUG, "TWT: Failed to send TWT Setup Request");
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ret = -ECANCELED;
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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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/**
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* wpas_twt_send_teardown - Send TWT teardown request to our AP
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* @wpa_s: Pointer to wpa_supplicant
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* @flags: The byte that goes inside the TWT Teardown element
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* Returns: 0 in case of success, negative error code otherwise
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*
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*/
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int wpas_twt_send_teardown(struct wpa_supplicant *wpa_s, u8 flags)
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{
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struct wpabuf *buf;
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int ret = 0;
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if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_ssid) {
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wpa_printf(MSG_DEBUG,
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"TWT: No connection - cannot send TWT Teardown frame");
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return -ENOTCONN;
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}
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/* 3 = Action category + Action code + flags */
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buf = wpabuf_alloc(3);
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if (!buf) {
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wpa_printf(MSG_DEBUG,
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"TWT: Failed to allocate TWT Teardown frame");
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return -ENOMEM;
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}
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wpa_printf(MSG_DEBUG, "TWT: Teardown request, flags: 0x%x", flags);
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wpabuf_put_u8(buf, WLAN_ACTION_S1G);
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wpabuf_put_u8(buf, S1G_ACT_TWT_TEARDOWN);
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wpabuf_put_u8(buf, flags);
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if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
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wpa_printf(MSG_DEBUG, "TWT: Failed to send TWT Teardown frame");
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ret = -ECANCELED;
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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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#endif /* CONFIG_TESTING_OPTIONS */
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