/*
* Driver interaction with Linux nl80211/cfg80211 - Scanning
* Copyright(c) 2015 Intel Deutschland GmbH
* Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
* Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
* Copyright (c) 2009-2010, Atheros Communications
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <time.h>
#include <netlink/genl/genl.h>
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/qca-vendor.h"
#include "driver_nl80211.h"
#define MAX_NL80211_NOISE_FREQS 50
struct nl80211_noise_info {
u32 freq[MAX_NL80211_NOISE_FREQS];
s8 noise[MAX_NL80211_NOISE_FREQS];
unsigned int count;
};
static int get_noise_for_scan_results(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
};
struct nl80211_noise_info *info = arg;
if (info->count >= MAX_NL80211_NOISE_FREQS)
return NL_STOP;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_SURVEY_INFO]) {
wpa_printf(MSG_DEBUG, "nl80211: Survey data missing");
return NL_SKIP;
}
if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
tb[NL80211_ATTR_SURVEY_INFO],
survey_policy)) {
wpa_printf(MSG_DEBUG, "nl80211: Failed to parse nested "
"attributes");
return NL_SKIP;
}
if (!sinfo[NL80211_SURVEY_INFO_NOISE])
return NL_SKIP;
if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
return NL_SKIP;
info->freq[info->count] =
nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
info->noise[info->count] =
(s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
info->count++;
return NL_SKIP;
}
static int nl80211_get_noise_for_scan_results(
struct wpa_driver_nl80211_data *drv, struct nl80211_noise_info *info)
{
struct nl_msg *msg;
os_memset(info, 0, sizeof(*info));
msg = nl80211_drv_msg(drv, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);
return send_and_recv_msgs(drv, msg, get_noise_for_scan_results, info);
}
static int nl80211_abort_scan(struct i802_bss *bss)
{
int ret;
struct nl_msg *msg;
struct wpa_driver_nl80211_data *drv = bss->drv;
wpa_printf(MSG_DEBUG, "nl80211: Abort scan");
msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_ABORT_SCAN);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Abort scan failed: ret=%d (%s)",
ret, strerror(-ret));
}
return ret;
}
#ifdef CONFIG_DRIVER_NL80211_QCA
static int nl80211_abort_vendor_scan(struct wpa_driver_nl80211_data *drv,
u64 scan_cookie)
{
struct nl_msg *msg;
struct nlattr *params;
int ret;
wpa_printf(MSG_DEBUG, "nl80211: Abort vendor scan with cookie 0x%llx",
(long long unsigned int) scan_cookie);
msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR);
if (!msg ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
QCA_NL80211_VENDOR_SUBCMD_ABORT_SCAN) ||
!(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
nla_put_u64(msg, QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE, scan_cookie))
goto fail;
nla_nest_end(msg, params);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_INFO,
"nl80211: Aborting vendor scan with cookie 0x%llx failed: ret=%d (%s)",
(long long unsigned int) scan_cookie, ret,
strerror(-ret));
goto fail;
}
return 0;
fail:
nlmsg_free(msg);
return -1;
}
#endif /* CONFIG_DRIVER_NL80211_QCA */
/**
* wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
* @eloop_ctx: Driver private data
* @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
*
* This function can be used as registered timeout when starting a scan to
* generate a scan completed event if the driver does not report this.
*/
void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_driver_nl80211_data *drv = eloop_ctx;
wpa_printf(MSG_DEBUG, "nl80211: Scan timeout - try to abort it");
#ifdef CONFIG_DRIVER_NL80211_QCA
if (drv->vendor_scan_cookie &&
nl80211_abort_vendor_scan(drv, drv->vendor_scan_cookie) == 0)
return;
#endif /* CONFIG_DRIVER_NL80211_QCA */
if (!drv->vendor_scan_cookie &&
nl80211_abort_scan(drv->first_bss) == 0)
return;
wpa_printf(MSG_DEBUG, "nl80211: Failed to abort scan");
if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED) {
wpa_driver_nl80211_set_mode(drv->first_bss,
drv->ap_scan_as_station);
drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
}
wpa_printf(MSG_DEBUG, "nl80211: Try to get scan results");
wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}
static struct nl_msg *
nl80211_scan_common(struct i802_bss *bss, u8 cmd,
struct wpa_driver_scan_params *params)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
size_t i;
u32 scan_flags = 0;
msg = nl80211_cmd_msg(bss, 0, cmd);
if (!msg)
return NULL;
if (params->num_ssids) {
struct nlattr *ssids;
ssids = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
if (ssids == NULL)
goto fail;
for (i = 0; i < params->num_ssids; i++) {
wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
params->ssids[i].ssid,
params->ssids[i].ssid_len);
if (nla_put(msg, i + 1, params->ssids[i].ssid_len,
params->ssids[i].ssid))
goto fail;
}
nla_nest_end(msg, ssids);
} else {
wpa_printf(MSG_DEBUG, "nl80211: Passive scan requested");
}
if (params->extra_ies) {
wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
params->extra_ies, params->extra_ies_len);
if (nla_put(msg, NL80211_ATTR_IE, params->extra_ies_len,
params->extra_ies))
goto fail;
}
if (params->freqs) {
struct nlattr *freqs;
freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
if (freqs == NULL)
goto fail;
for (i = 0; params->freqs[i]; i++) {
wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
"MHz", params->freqs[i]);
if (nla_put_u32(msg, i + 1, params->freqs[i]))
goto fail;
}
nla_nest_end(msg, freqs);
}
os_free(drv->filter_ssids);
drv->filter_ssids = params->filter_ssids;
params->filter_ssids = NULL;
drv->num_filter_ssids = params->num_filter_ssids;
if (params->only_new_results) {
wpa_printf(MSG_DEBUG, "nl80211: Add NL80211_SCAN_FLAG_FLUSH");
scan_flags |= NL80211_SCAN_FLAG_FLUSH;
}
if (params->low_priority && drv->have_low_prio_scan) {
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_LOW_PRIORITY");
scan_flags |= NL80211_SCAN_FLAG_LOW_PRIORITY;
}
if (params->mac_addr_rand) {
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_RANDOM_ADDR");
scan_flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
if (params->mac_addr) {
wpa_printf(MSG_DEBUG, "nl80211: MAC address: " MACSTR,
MAC2STR(params->mac_addr));
if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
params->mac_addr))
goto fail;
}
if (params->mac_addr_mask) {
wpa_printf(MSG_DEBUG, "nl80211: MAC address mask: "
MACSTR, MAC2STR(params->mac_addr_mask));
if (nla_put(msg, NL80211_ATTR_MAC_MASK, ETH_ALEN,
params->mac_addr_mask))
goto fail;
}
}
if (params->duration) {
if (!(drv->capa.rrm_flags &
WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) ||
nla_put_u16(msg, NL80211_ATTR_MEASUREMENT_DURATION,
params->duration))
goto fail;
if (params->duration_mandatory &&
nla_put_flag(msg,
NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY))
goto fail;
}
if (params->oce_scan) {
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME");
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP");
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_OCE_PROBE_REQ_MIN_TX_RATE");
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION");
scan_flags |= NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME |
NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION;
}
if (scan_flags &&
nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, scan_flags))
goto fail;
return msg;
fail:
nlmsg_free(msg);
return NULL;
}
/**
* wpa_driver_nl80211_scan - Request the driver to initiate scan
* @bss: Pointer to private driver data from wpa_driver_nl80211_init()
* @params: Scan parameters
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_nl80211_scan(struct i802_bss *bss,
struct wpa_driver_scan_params *params)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1, timeout;
struct nl_msg *msg = NULL;
wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: scan request");
drv->scan_for_auth = 0;
if (TEST_FAIL())
return -1;
msg = nl80211_scan_common(bss, NL80211_CMD_TRIGGER_SCAN, params);
if (!msg)
return -1;
if (params->p2p_probe) {
struct nlattr *rates;
wpa_printf(MSG_DEBUG, "nl80211: P2P probe - mask SuppRates");
rates = nla_nest_start(msg, NL80211_ATTR_SCAN_SUPP_RATES);
if (rates == NULL)
goto fail;
/*
* Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
* by masking out everything else apart from the OFDM rates 6,
* 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
* rates are left enabled.
*/
if (nla_put(msg, NL80211_BAND_2GHZ, 8,
"\x0c\x12\x18\x24\x30\x48\x60\x6c"))
goto fail;
nla_nest_end(msg, rates);
if (nla_put_flag(msg, NL80211_ATTR_TX_NO_CCK_RATE))
goto fail;
}
if (params->bssid) {
wpa_printf(MSG_DEBUG, "nl80211: Scan for a specific BSSID: "
MACSTR, MAC2STR(params->bssid));
if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
goto fail;
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
"(%s)", ret, strerror(-ret));
if (drv->hostapd && is_ap_interface(drv->nlmode)) {
enum nl80211_iftype old_mode = drv->nlmode;
/*
* mac80211 does not allow scan requests in AP mode, so
* try to do this in station mode.
*/
if (wpa_driver_nl80211_set_mode(
bss, NL80211_IFTYPE_STATION))
goto fail;
if (wpa_driver_nl80211_scan(bss, params)) {
wpa_driver_nl80211_set_mode(bss, old_mode);
goto fail;
}
/* Restore AP mode when processing scan results */
drv->ap_scan_as_station = old_mode;
ret = 0;
} else
goto fail;
}
drv->scan_state = SCAN_REQUESTED;
/* Not all drivers generate "scan completed" wireless event, so try to
* read results after a timeout. */
timeout = 10;
if (drv->scan_complete_events) {
/*
* The driver seems to deliver events to notify when scan is
* complete, so use longer timeout to avoid race conditions
* with scanning and following association request.
*/
timeout = 30;
}
wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
"seconds", ret, timeout);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
drv, drv->ctx);
drv->last_scan_cmd = NL80211_CMD_TRIGGER_SCAN;
fail:
nlmsg_free(msg);
return ret;
}
static int
nl80211_sched_scan_add_scan_plans(struct wpa_driver_nl80211_data *drv,
struct nl_msg *msg,
struct wpa_driver_scan_params *params)
{
struct nlattr *plans;
struct sched_scan_plan *scan_plans = params->sched_scan_plans;
unsigned int i;
plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
if (!plans)
return -1;
for (i = 0; i < params->sched_scan_plans_num; i++) {
struct nlattr *plan = nla_nest_start(msg, i + 1);
if (!plan)
return -1;
if (!scan_plans[i].interval ||
scan_plans[i].interval >
drv->capa.max_sched_scan_plan_interval) {
wpa_printf(MSG_DEBUG,
"nl80211: sched scan plan no. %u: Invalid interval: %u",
i, scan_plans[i].interval);
return -1;
}
if (nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
scan_plans[i].interval))
return -1;
if (scan_plans[i].iterations >
drv->capa.max_sched_scan_plan_iterations) {
wpa_printf(MSG_DEBUG,
"nl80211: sched scan plan no. %u: Invalid number of iterations: %u",
i, scan_plans[i].iterations);
return -1;
}
if (scan_plans[i].iterations &&
nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
scan_plans[i].iterations))
return -1;
nla_nest_end(msg, plan);
/*
* All the scan plans must specify the number of iterations
* except the last plan, which will run infinitely. So if the
* number of iterations is not specified, this ought to be the
* last scan plan.
*/
if (!scan_plans[i].iterations)
break;
}
if (i != params->sched_scan_plans_num - 1) {
wpa_printf(MSG_DEBUG,
"nl80211: All sched scan plans but the last must specify number of iterations");
return -1;
}
nla_nest_end(msg, plans);
return 0;
}
/**
* wpa_driver_nl80211_sched_scan - Initiate a scheduled scan
* @priv: Pointer to private driver data from wpa_driver_nl80211_init()
* @params: Scan parameters
* Returns: 0 on success, -1 on failure or if not supported
*/
int wpa_driver_nl80211_sched_scan(void *priv,
struct wpa_driver_scan_params *params)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1;
struct nl_msg *msg;
size_t i;
wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: sched_scan request");
#ifdef ANDROID
if (!drv->capa.sched_scan_supported)
return android_pno_start(bss, params);
#endif /* ANDROID */
if (!params->sched_scan_plans_num ||
params->sched_scan_plans_num > drv->capa.max_sched_scan_plans) {
wpa_printf(MSG_ERROR,
"nl80211: Invalid number of sched scan plans: %u",
params->sched_scan_plans_num);
return -1;
}
msg = nl80211_scan_common(bss, NL80211_CMD_START_SCHED_SCAN, params);
if (!msg)
goto fail;
if (drv->capa.max_sched_scan_plan_iterations) {
if (nl80211_sched_scan_add_scan_plans(drv, msg, params))
goto fail;
} else {
if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
params->sched_scan_plans[0].interval * 1000))
goto fail;
}
if ((drv->num_filter_ssids &&
(int) drv->num_filter_ssids <= drv->capa.max_match_sets) ||
params->filter_rssi) {
struct nlattr *match_sets;
match_sets = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
if (match_sets == NULL)
goto fail;
for (i = 0; i < drv->num_filter_ssids; i++) {
struct nlattr *match_set_ssid;
wpa_hexdump_ascii(MSG_MSGDUMP,
"nl80211: Sched scan filter SSID",
drv->filter_ssids[i].ssid,
drv->filter_ssids[i].ssid_len);
match_set_ssid = nla_nest_start(msg, i + 1);
if (match_set_ssid == NULL ||
nla_put(msg, NL80211_ATTR_SCHED_SCAN_MATCH_SSID,
drv->filter_ssids[i].ssid_len,
drv->filter_ssids[i].ssid) ||
(params->filter_rssi &&
nla_put_u32(msg,
NL80211_SCHED_SCAN_MATCH_ATTR_RSSI,
params->filter_rssi)))
goto fail;
nla_nest_end(msg, match_set_ssid);
}
/*
* Due to backward compatibility code, newer kernels treat this
* matchset (with only an RSSI filter) as the default for all
* other matchsets, unless it's the only one, in which case the
* matchset will actually allow all SSIDs above the RSSI.
*/
if (params->filter_rssi) {
struct nlattr *match_set_rssi;
match_set_rssi = nla_nest_start(msg, 0);
if (match_set_rssi == NULL ||
nla_put_u32(msg, NL80211_SCHED_SCAN_MATCH_ATTR_RSSI,
params->filter_rssi))
goto fail;
wpa_printf(MSG_MSGDUMP,
"nl80211: Sched scan RSSI filter %d dBm",
params->filter_rssi);
nla_nest_end(msg, match_set_rssi);
}
nla_nest_end(msg, match_sets);
}
if (params->relative_rssi_set) {
struct nl80211_bss_select_rssi_adjust rssi_adjust;
os_memset(&rssi_adjust, 0, sizeof(rssi_adjust));
wpa_printf(MSG_DEBUG, "nl80211: Relative RSSI: %d",
params->relative_rssi);
if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
params->relative_rssi))
goto fail;
if (params->relative_adjust_rssi) {
int pref_band_set = 1;
switch (params->relative_adjust_band) {
case WPA_SETBAND_5G:
rssi_adjust.band = NL80211_BAND_5GHZ;
break;
case WPA_SETBAND_2G:
rssi_adjust.band = NL80211_BAND_2GHZ;
break;
default:
pref_band_set = 0;
break;
}
rssi_adjust.delta = params->relative_adjust_rssi;
if (pref_band_set &&
nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
sizeof(rssi_adjust), &rssi_adjust))
goto fail;
}
}
if (params->sched_scan_start_delay &&
nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY,
params->sched_scan_start_delay))
goto fail;
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
/* TODO: if we get an error here, we should fall back to normal scan */
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Sched scan start failed: "
"ret=%d (%s)", ret, strerror(-ret));
goto fail;
}
wpa_printf(MSG_DEBUG, "nl80211: Sched scan requested (ret=%d)", ret);
fail:
nlmsg_free(msg);
return ret;
}
/**
* wpa_driver_nl80211_stop_sched_scan - Stop a scheduled scan
* @priv: Pointer to private driver data from wpa_driver_nl80211_init()
* Returns: 0 on success, -1 on failure or if not supported
*/
int wpa_driver_nl80211_stop_sched_scan(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret;
struct nl_msg *msg;
#ifdef ANDROID
if (!drv->capa.sched_scan_supported)
return android_pno_stop(bss);
#endif /* ANDROID */
msg = nl80211_drv_msg(drv, 0, NL80211_CMD_STOP_SCHED_SCAN);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
wpa_printf(MSG_DEBUG,
"nl80211: Sched scan stop failed: ret=%d (%s)",
ret, strerror(-ret));
} else {
wpa_printf(MSG_DEBUG,
"nl80211: Sched scan stop sent");
}
return ret;
}
static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
const u8 *ie, size_t ie_len)
{
const u8 *ssid;
size_t i;
if (drv->filter_ssids == NULL)
return 0;
ssid = get_ie(ie, ie_len, WLAN_EID_SSID);
if (ssid == NULL)
return 1;
for (i = 0; i < drv->num_filter_ssids; i++) {
if (ssid[1] == drv->filter_ssids[i].ssid_len &&
os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
0)
return 0;
}
return 1;
}
static struct wpa_scan_res *
nl80211_parse_bss_info(struct wpa_driver_nl80211_data *drv,
struct nl_msg *msg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *bss[NL80211_BSS_MAX + 1];
static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
[NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
[NL80211_BSS_TSF] = { .type = NLA_U64 },
[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
[NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
[NL80211_BSS_STATUS] = { .type = NLA_U32 },
[NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
[NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
[NL80211_BSS_PARENT_TSF] = { .type = NLA_U64 },
[NL80211_BSS_PARENT_BSSID] = { .type = NLA_UNSPEC },
[NL80211_BSS_LAST_SEEN_BOOTTIME] = { .type = NLA_U64 },
};
struct wpa_scan_res *r;
const u8 *ie, *beacon_ie;
size_t ie_len, beacon_ie_len;
u8 *pos;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_BSS])
return NULL;
if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
bss_policy))
return NULL;
if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
} else {
ie = NULL;
ie_len = 0;
}
if (bss[NL80211_BSS_BEACON_IES]) {
beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
} else {
beacon_ie = NULL;
beacon_ie_len = 0;
}
if (nl80211_scan_filtered(drv, ie ? ie : beacon_ie,
ie ? ie_len : beacon_ie_len))
return NULL;
r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
if (r == NULL)
return NULL;
if (bss[NL80211_BSS_BSSID])
os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
ETH_ALEN);
if (bss[NL80211_BSS_FREQUENCY])
r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
if (bss[NL80211_BSS_BEACON_INTERVAL])
r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
if (bss[NL80211_BSS_CAPABILITY])
r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
r->flags |= WPA_SCAN_NOISE_INVALID;
if (bss[NL80211_BSS_SIGNAL_MBM]) {
r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
r->level /= 100; /* mBm to dBm */
r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
} else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
r->flags |= WPA_SCAN_QUAL_INVALID;
} else
r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
if (bss[NL80211_BSS_TSF])
r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
if (bss[NL80211_BSS_BEACON_TSF]) {
u64 tsf = nla_get_u64(bss[NL80211_BSS_BEACON_TSF]);
if (tsf > r->tsf)
r->tsf = tsf;
}
if (bss[NL80211_BSS_SEEN_MS_AGO])
r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
if (bss[NL80211_BSS_LAST_SEEN_BOOTTIME]) {
u64 boottime;
struct timespec ts;
#ifndef CLOCK_BOOTTIME
#define CLOCK_BOOTTIME 7
#endif
if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0) {
/* Use more accurate boottime information to update the
* scan result age since the driver reports this and
* CLOCK_BOOTTIME is available. */
boottime = nla_get_u64(
bss[NL80211_BSS_LAST_SEEN_BOOTTIME]);
r->age = ((u64) ts.tv_sec * 1000000000 +
ts.tv_nsec - boottime) / 1000000;
}
}
r->ie_len = ie_len;
pos = (u8 *) (r + 1);
if (ie) {
os_memcpy(pos, ie, ie_len);
pos += ie_len;
}
r->beacon_ie_len = beacon_ie_len;
if (beacon_ie)
os_memcpy(pos, beacon_ie, beacon_ie_len);
if (bss[NL80211_BSS_STATUS]) {
enum nl80211_bss_status status;
status = nla_get_u32(bss[NL80211_BSS_STATUS]);
switch (status) {
case NL80211_BSS_STATUS_ASSOCIATED:
r->flags |= WPA_SCAN_ASSOCIATED;
break;
default:
break;
}
}
if (bss[NL80211_BSS_PARENT_TSF] && bss[NL80211_BSS_PARENT_BSSID]) {
r->parent_tsf = nla_get_u64(bss[NL80211_BSS_PARENT_TSF]);
os_memcpy(r->tsf_bssid, nla_data(bss[NL80211_BSS_PARENT_BSSID]),
ETH_ALEN);
}
return r;
}
struct nl80211_bss_info_arg {
struct wpa_driver_nl80211_data *drv;
struct wpa_scan_results *res;
};
static int bss_info_handler(struct nl_msg *msg, void *arg)
{
struct nl80211_bss_info_arg *_arg = arg;
struct wpa_scan_results *res = _arg->res;
struct wpa_scan_res **tmp;
struct wpa_scan_res *r;
r = nl80211_parse_bss_info(_arg->drv, msg);
if (!r)
return NL_SKIP;
if (!res) {
os_free(r);
return NL_SKIP;
}
tmp = os_realloc_array(res->res, res->num + 1,
sizeof(struct wpa_scan_res *));
if (tmp == NULL) {
os_free(r);
return NL_SKIP;
}
tmp[res->num++] = r;
res->res = tmp;
return NL_SKIP;
}
static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
const u8 *addr)
{
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
"mismatch (" MACSTR ")", MAC2STR(addr));
wpa_driver_nl80211_mlme(drv, addr,
NL80211_CMD_DEAUTHENTICATE,
WLAN_REASON_PREV_AUTH_NOT_VALID, 1,
NULL);
}
}
static void nl80211_check_bss_status(struct wpa_driver_nl80211_data *drv,
struct wpa_scan_res *r)
{
if (!(r->flags & WPA_SCAN_ASSOCIATED))
return;
wpa_printf(MSG_DEBUG, "nl80211: Scan results indicate BSS status with "
MACSTR " as associated", MAC2STR(r->bssid));
if (is_sta_interface(drv->nlmode) && !drv->associated) {
wpa_printf(MSG_DEBUG,
"nl80211: Local state (not associated) does not match with BSS state");
clear_state_mismatch(drv, r->bssid);
} else if (is_sta_interface(drv->nlmode) &&
os_memcmp(drv->bssid, r->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG,
"nl80211: Local state (associated with " MACSTR
") does not match with BSS state",
MAC2STR(drv->bssid));
clear_state_mismatch(drv, r->bssid);
clear_state_mismatch(drv, drv->bssid);
}
}
static void wpa_driver_nl80211_check_bss_status(
struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
{
size_t i;
for (i = 0; i < res->num; i++)
nl80211_check_bss_status(drv, res->res[i]);
}
static void nl80211_update_scan_res_noise(struct wpa_scan_res *res,
struct nl80211_noise_info *info)
{
unsigned int i;
for (i = 0; res && i < info->count; i++) {
if ((int) info->freq[i] != res->freq ||
!(res->flags & WPA_SCAN_NOISE_INVALID))
continue;
res->noise = info->noise[i];
res->flags &= ~WPA_SCAN_NOISE_INVALID;
}
}
static struct wpa_scan_results *
nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
struct wpa_scan_results *res;
int ret;
struct nl80211_bss_info_arg arg;
res = os_zalloc(sizeof(*res));
if (res == NULL)
return NULL;
if (!(msg = nl80211_cmd_msg(drv->first_bss, NLM_F_DUMP,
NL80211_CMD_GET_SCAN))) {
wpa_scan_results_free(res);
return NULL;
}
arg.drv = drv;
arg.res = res;
ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
if (ret == 0) {
struct nl80211_noise_info info;
wpa_printf(MSG_DEBUG, "nl80211: Received scan results (%lu "
"BSSes)", (unsigned long) res->num);
if (nl80211_get_noise_for_scan_results(drv, &info) == 0) {
size_t i;
for (i = 0; i < res->num; ++i)
nl80211_update_scan_res_noise(res->res[i],
&info);
}
return res;
}
wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
"(%s)", ret, strerror(-ret));
wpa_scan_results_free(res);
return NULL;
}
/**
* wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
* @priv: Pointer to private wext data from wpa_driver_nl80211_init()
* Returns: Scan results on success, -1 on failure
*/
struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct wpa_scan_results *res;
res = nl80211_get_scan_results(drv);
if (res)
wpa_driver_nl80211_check_bss_status(drv, res);
return res;
}
struct nl80211_dump_scan_ctx {
struct wpa_driver_nl80211_data *drv;
int idx;
};
static int nl80211_dump_scan_handler(struct nl_msg *msg, void *arg)
{
struct nl80211_dump_scan_ctx *ctx = arg;
struct wpa_scan_res *r;
r = nl80211_parse_bss_info(ctx->drv, msg);
if (!r)
return NL_SKIP;
wpa_printf(MSG_DEBUG, "nl80211: %d " MACSTR " %d%s",
ctx->idx, MAC2STR(r->bssid), r->freq,
r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
ctx->idx++;
os_free(r);
return NL_SKIP;
}
void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
struct nl80211_dump_scan_ctx ctx;
wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
ctx.drv = drv;
ctx.idx = 0;
msg = nl80211_cmd_msg(drv->first_bss, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
if (msg)
send_and_recv_msgs(drv, msg, nl80211_dump_scan_handler, &ctx);
}
int wpa_driver_nl80211_abort_scan(void *priv, u64 scan_cookie)
{
struct i802_bss *bss = priv;
#ifdef CONFIG_DRIVER_NL80211_QCA
struct wpa_driver_nl80211_data *drv = bss->drv;
/*
* If scan_cookie is zero, a normal scan through kernel (cfg80211)
* was triggered, hence abort the cfg80211 scan instead of the vendor
* scan.
*/
if (drv->scan_vendor_cmd_avail && scan_cookie)
return nl80211_abort_vendor_scan(drv, scan_cookie);
#endif /* CONFIG_DRIVER_NL80211_QCA */
return nl80211_abort_scan(bss);
}
#ifdef CONFIG_DRIVER_NL80211_QCA
static int scan_cookie_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
u64 *cookie = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_VENDOR_DATA]) {
struct nlattr *nl_vendor = tb[NL80211_ATTR_VENDOR_DATA];
struct nlattr *tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_MAX + 1];
nla_parse(tb_vendor, QCA_WLAN_VENDOR_ATTR_SCAN_MAX,
nla_data(nl_vendor), nla_len(nl_vendor), NULL);
if (tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE])
*cookie = nla_get_u64(
tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE]);
}
return NL_SKIP;
}
/**
* wpa_driver_nl80211_vendor_scan - Request the driver to initiate a vendor scan
* @bss: Pointer to private driver data from wpa_driver_nl80211_init()
* @params: Scan parameters
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_nl80211_vendor_scan(struct i802_bss *bss,
struct wpa_driver_scan_params *params)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg = NULL;
struct nlattr *attr;
size_t i;
u32 scan_flags = 0;
int ret = -1;
u64 cookie = 0;
wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: vendor scan request");
drv->scan_for_auth = 0;
if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
QCA_NL80211_VENDOR_SUBCMD_TRIGGER_SCAN) )
goto fail;
attr = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
if (attr == NULL)
goto fail;
if (params->num_ssids) {
struct nlattr *ssids;
ssids = nla_nest_start(msg, QCA_WLAN_VENDOR_ATTR_SCAN_SSIDS);
if (ssids == NULL)
goto fail;
for (i = 0; i < params->num_ssids; i++) {
wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
params->ssids[i].ssid,
params->ssids[i].ssid_len);
if (nla_put(msg, i + 1, params->ssids[i].ssid_len,
params->ssids[i].ssid))
goto fail;
}
nla_nest_end(msg, ssids);
}
if (params->extra_ies) {
wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
params->extra_ies, params->extra_ies_len);
if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_IE,
params->extra_ies_len, params->extra_ies))
goto fail;
}
if (params->freqs) {
struct nlattr *freqs;
freqs = nla_nest_start(msg,
QCA_WLAN_VENDOR_ATTR_SCAN_FREQUENCIES);
if (freqs == NULL)
goto fail;
for (i = 0; params->freqs[i]; i++) {
wpa_printf(MSG_MSGDUMP,
"nl80211: Scan frequency %u MHz",
params->freqs[i]);
if (nla_put_u32(msg, i + 1, params->freqs[i]))
goto fail;
}
nla_nest_end(msg, freqs);
}
os_free(drv->filter_ssids);
drv->filter_ssids = params->filter_ssids;
params->filter_ssids = NULL;
drv->num_filter_ssids = params->num_filter_ssids;
if (params->low_priority && drv->have_low_prio_scan) {
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_LOW_PRIORITY");
scan_flags |= NL80211_SCAN_FLAG_LOW_PRIORITY;
}
if (params->mac_addr_rand) {
wpa_printf(MSG_DEBUG,
"nl80211: Add NL80211_SCAN_FLAG_RANDOM_ADDR");
scan_flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
if (params->mac_addr) {
wpa_printf(MSG_DEBUG, "nl80211: MAC address: " MACSTR,
MAC2STR(params->mac_addr));
if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_MAC,
ETH_ALEN, params->mac_addr))
goto fail;
}
if (params->mac_addr_mask) {
wpa_printf(MSG_DEBUG, "nl80211: MAC address mask: "
MACSTR, MAC2STR(params->mac_addr_mask));
if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_MAC_MASK,
ETH_ALEN, params->mac_addr_mask))
goto fail;
}
}
if (scan_flags &&
nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_SCAN_FLAGS, scan_flags))
goto fail;
if (params->p2p_probe) {
struct nlattr *rates;
wpa_printf(MSG_DEBUG, "nl80211: P2P probe - mask SuppRates");
rates = nla_nest_start(msg,
QCA_WLAN_VENDOR_ATTR_SCAN_SUPP_RATES);
if (rates == NULL)
goto fail;
/*
* Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
* by masking out everything else apart from the OFDM rates 6,
* 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
* rates are left enabled.
*/
if (nla_put(msg, NL80211_BAND_2GHZ, 8,
"\x0c\x12\x18\x24\x30\x48\x60\x6c"))
goto fail;
nla_nest_end(msg, rates);
if (nla_put_flag(msg, QCA_WLAN_VENDOR_ATTR_SCAN_TX_NO_CCK_RATE))
goto fail;
}
if (params->bssid) {
wpa_printf(MSG_DEBUG, "nl80211: Scan for a specific BSSID: "
MACSTR, MAC2STR(params->bssid));
if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_BSSID, ETH_ALEN,
params->bssid))
goto fail;
}
nla_nest_end(msg, attr);
ret = send_and_recv_msgs(drv, msg, scan_cookie_handler, &cookie);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG,
"nl80211: Vendor scan trigger failed: ret=%d (%s)",
ret, strerror(-ret));
goto fail;
}
drv->vendor_scan_cookie = cookie;
drv->scan_state = SCAN_REQUESTED;
/* Pass the cookie to the caller to help distinguish the scans. */
params->scan_cookie = cookie;
wpa_printf(MSG_DEBUG,
"nl80211: Vendor scan requested (ret=%d) - scan timeout 30 seconds, scan cookie:0x%llx",
ret, (long long unsigned int) cookie);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
eloop_register_timeout(30, 0, wpa_driver_nl80211_scan_timeout,
drv, drv->ctx);
drv->last_scan_cmd = NL80211_CMD_VENDOR;
fail:
nlmsg_free(msg);
return ret;
}
/**
* nl80211_set_default_scan_ies - Set the scan default IEs to the driver
* @priv: Pointer to private driver data from wpa_driver_nl80211_init()
* @ies: Pointer to IEs buffer
* @ies_len: Length of IEs in bytes
* Returns: 0 on success, -1 on failure
*/
int nl80211_set_default_scan_ies(void *priv, const u8 *ies, size_t ies_len)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg = NULL;
struct nlattr *attr;
int ret = -1;
if (!drv->set_wifi_conf_vendor_cmd_avail)
return -1;
if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
QCA_NL80211_VENDOR_SUBCMD_SET_WIFI_CONFIGURATION))
goto fail;
attr = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
if (attr == NULL)
goto fail;
wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan default IEs", ies, ies_len);
if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_CONFIG_SCAN_DEFAULT_IES,
ies_len, ies))
goto fail;
nla_nest_end(msg, attr);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_ERROR,
"nl80211: Set scan default IEs failed: ret=%d (%s)",
ret, strerror(-ret));
goto fail;
}
fail:
nlmsg_free(msg);
return ret;
}
#endif /* CONFIG_DRIVER_NL80211_QCA */