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nl80211: Use NL80211_BSS_LAST_SEEN_BOOTTIME if available

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This allows a more accurate scan result age to be fetched than the one
available through NL80211_BSS_SEEN_MS_AGO.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2017-10-17 00:04:52 +03:00
parent a6ea665300
commit 006fb845b8
1 changed files with 19 additions and 0 deletions
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19
src/drivers/driver_nl80211_scan.c
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@ -10,6 +10,7 @@
*/
#include "includes.h"
#include <time.h>
#include <netlink/genl/genl.h>
#include "utils/common.h"
@ -696,6 +697,7 @@ nl80211_parse_bss_info(struct wpa_driver_nl80211_data *drv,
[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;
@ -759,6 +761,23 @@ nl80211_parse_bss_info(struct wpa_driver_nl80211_data *drv,
}
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) {