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| author | Holger Schurig <hs4233@mail.mn-solutions.de> | 2009-09-24 12:21:01 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-10-07 16:39:42 -0400 |
| commit | 7c89606e24cdabaceb8ca9b3c7ab866c6bcc9e38 (patch) | |
| tree | b2f76700d27154479e5ee72211d1ab6a6275d00b | |
| parent | 7976b4263cb05dc638297d35f2a42375090ebaff (diff) | |
| download | linux-3.10-7c89606e24cdabaceb8ca9b3c7ab866c6bcc9e38.tar.gz linux-3.10-7c89606e24cdabaceb8ca9b3c7ab866c6bcc9e38.tar.bz2 linux-3.10-7c89606e24cdabaceb8ca9b3c7ab866c6bcc9e38.zip | |
nl80211: report age of scan results
Linux keeps scan results up to 15 seconds. This can be a problem for fast
moving clients: they get back stale data. But if the kernel reports the age
of the BSS items, then user-space can simply weed out old entries by itself.
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | include/linux/nl80211.h | 2 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index a8d71ed43a0..50afca3dcff 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -1277,6 +1277,7 @@ enum nl80211_channel_type { * @NL80211_BSS_SIGNAL_UNSPEC: signal strength of the probe response/beacon * in unspecified units, scaled to 0..100 (u8) * @NL80211_BSS_STATUS: status, if this BSS is "used" + * @NL80211_BSS_SEEN_MS_AGO: age of this BSS entry in ms * @__NL80211_BSS_AFTER_LAST: internal * @NL80211_BSS_MAX: highest BSS attribute */ @@ -1291,6 +1292,7 @@ enum nl80211_bss { NL80211_BSS_SIGNAL_MBM, NL80211_BSS_SIGNAL_UNSPEC, NL80211_BSS_STATUS, + NL80211_BSS_SEEN_MS_AGO, /* keep last */ __NL80211_BSS_AFTER_LAST, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index eddab097435..e0ecc9f153d 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3105,6 +3105,8 @@ static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval); NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); + NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO, + jiffies_to_msecs(jiffies - intbss->ts)); switch (rdev->wiphy.signal_type) { case CFG80211_SIGNAL_TYPE_MBM: |