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wpa_supplicant: Add initial roaming support

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This commit adds different features from 802.11k and 802.11v
specifications to make the device ready for network assisted
roaming. It also adds initial framework for device to detect
whether it needs to move to a better AP.

Followings are added as part of this.

1. Support for sending neighbor report request and provide
   the report back to the APP.
2. Support for beacon measurement report.
3. Support for link measurement report.
4. Support for sending bss transition management query frame
   (triggered by the APP).
5. Support for bss transition management request and move
   to the candidate based on that.
6. Sending the bss transition management response.
This commit is contained in:
kapil.gupta
2020-11-12 13:48:24 +05:30
parent ac477ad6b9
commit 27101f9454
48 changed files with 5553 additions and 144 deletions
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95
components/wpa_supplicant/src/common/scan.c Normal file
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/*
* WPA Supplicant - Scanning
* Copyright (c) 2003-2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "common/ieee802_11_defs.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "drivers/driver.h"
#include "common/ieee802_11_common.h"
#include "bss.h"
#include "scan.h"
/**
* wpa_supplicant_req_scan - Schedule a scan for neighboring access points
* @wpa_s: Pointer to wpa_supplicant data
* @sec: Number of seconds after which to scan
* @usec: Number of microseconds after which to scan
*
* This function is used to schedule a scan for neighboring access points after
* the specified time.
*/
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
{
int ret;
struct wpa_driver_scan_params *params;
os_sleep(sec, usec);
if (wpa_s->scanning) {
wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Return");
return;
}
params = os_zalloc(sizeof(*params));
if (wpa_s->wnm_mode) {
/* Use the same memory */
params->ssids[0].ssid = wpa_s->current_bss->ssid;
params->ssids[0].ssid_len = wpa_s->current_bss->ssid_len;
params->num_ssids = 1;
}
if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
/* Use the same memory */
params->bssid = wpa_s->next_scan_bssid;
}
if (wpa_s->next_scan_chan)
params->channel = wpa_s->next_scan_chan;
wpa_s->scan_reason = REASON_WNM_BSS_TRANS_REQ;
ret = wpa_supplicant_trigger_scan(wpa_s, params);
os_free(params);
if (ret < 0) {
wpa_printf(MSG_ERROR, "Failed to issue scan - Return");
return;
}
}
/**
* wpa_scan_get_ie - Fetch a specified information element from a scan result
* @res: Scan result entry
* @ie: Information element identitifier (WLAN_EID_*)
* Returns: Pointer to the information element (id field) or %NULL if not found
*
* This function returns the first matching information element in the scan
* result.
*/
const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
{
size_t ie_len = res->ie_len;
/* Use the Beacon frame IEs if res->ie_len is not available */
if (!ie_len)
ie_len = res->beacon_ie_len;
return get_ie((const u8 *) (res + 1), ie_len, ie);
}
void wpa_scan_free_params(struct wpa_driver_scan_params *params)
{
if (params == NULL)
return;
os_free((u8 *) params->bssid);
os_free(params);
}