[nrf noup]: zephyr: qt: Disconnect STA before reset

Previously, we had removed the disconnect functionality, as we
considered `kernel reboot` to be similar to a disconnection.

However, in one of the SVD test cases, it appears that the
access point (AP) required a deauthentication frame to clear
specific buffers, enabling the proper sending and receiving of
ICMP traffic. As a result, ICMP traffic from the AP is observed
to start with sequence number 8 after a reset.

To address this issue, add the functionality that implicitly sends
a Deauthentication frame to the AP. This change aligns with the
behavior observed in the Linux case, where terminating the supplicant
also triggers the sending of a Deauthentication frame.

Fixes SHEL-2062

Signed-off-by: Triveni Danda <triveni.danda@nordicsemi.no>

zephyr/src/indigo_api_callback_dut.c

@@ -1674,9 +1674,42 @@ static int get_ip_addr_handler(struct packet_wrapper *req, struct packet_wrapper
 }
 
 static int stop_sta_handler(struct packet_wrapper *req, struct packet_wrapper *resp) {
-    char *message = TLV_VALUE_WPA_S_STOP_OK;
-    int status = TLV_VALUE_STATUS_OK;
 
+    struct wpa_ctrl *w = NULL;
+    char *message = TLV_VALUE_WPA_S_STOP_NOT_OK;
+    char buffer[64], response[16];
+    int status = TLV_VALUE_STATUS_NOT_OK;
+    size_t resp_len;
+    struct wpa_supplicant *wpa_s = NULL;
+
+    wpa_s = z_wpas_get_handle_by_ifname(WIRELESS_INTERFACE_DEFAULT);
+    if (!wpa_s) {
+        indigo_logger(LOG_LEVEL_ERROR, "%s: Unable to get wpa_s handle for %s\n", __func__, WIRELESS_INTERFACE_DEFAULT);
+        goto done;
+    }
+
+    /* Open WPA supplicant UDS socket */
+    w = wpa_ctrl_open(wpa_s->ctrl_iface->sock_pair[0]);
+    if (!w) {
+        indigo_logger(LOG_LEVEL_ERROR, "Failed to connect to wpa_supplicant");
+        status = TLV_VALUE_STATUS_NOT_OK;
+        message = TLV_VALUE_WPA_S_STOP_NOT_OK;
+        goto done;
+    }
+    /* Send command to hostapd UDS socket */
+    memset(buffer, 0, sizeof(buffer));
+    sprintf(buffer, "DISCONNECT");
+    memset(response, 0, sizeof(response));
+    resp_len = sizeof(response) - 1;
+    wpa_ctrl_request(w, buffer, strlen(buffer), response, &resp_len, NULL);
+    if (strncmp(response, WPA_CTRL_OK, strlen(WPA_CTRL_OK)) != 0) {
+        indigo_logger(LOG_LEVEL_ERROR, "Failed to execute the command. Response: %s", response);
+        goto done;
+    }
+    status = TLV_VALUE_STATUS_OK;
+    message = TLV_VALUE_WPA_S_STOP_OK;
+
+done:
     fill_wrapper_message_hdr(resp, API_CMD_RESPONSE, req->hdr.seq);
     fill_wrapper_tlv_byte(resp, TLV_STATUS, status);
     fill_wrapper_tlv_bytes(resp, TLV_MESSAGE, strlen(message), message);