| Message ID | 200909241221.01456.hs4233@mail.mn-solutions.de (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Thu, 2009-09-24 at 12:21 +0200, Holger Schurig wrote: > 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> Fine with me, I don't care if there is a #define or not. Acked-by: Johannes Berg <johannes@sipsolutions.net> johannes > > --- > > v2: renamed NL80211_BSS_AGE_MS to NL80211_BSS_SEEN_MS_AGO to underline that > it's a relativene time > > --- linux-wl.orig/include/linux/nl80211.h > +++ linux-wl/include/linux/nl80211.h > @@ -1277,6 +1277,7 @@ > * @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 @@ > NL80211_BSS_SIGNAL_MBM, > NL80211_BSS_SIGNAL_UNSPEC, > NL80211_BSS_STATUS, > + NL80211_BSS_SEEN_MS_AGO, > > /* keep last */ > __NL80211_BSS_AFTER_LAST, > --- linux-wl.orig/net/wireless/nl80211.c > +++ linux-wl/net/wireless/nl80211.c > @@ -3105,6 +3105,8 @@ > 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: >
--- linux-wl.orig/include/linux/nl80211.h +++ linux-wl/include/linux/nl80211.h @@ -1277,6 +1277,7 @@ * @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 @@ NL80211_BSS_SIGNAL_MBM, NL80211_BSS_SIGNAL_UNSPEC, NL80211_BSS_STATUS, + NL80211_BSS_SEEN_MS_AGO, /* keep last */ __NL80211_BSS_AFTER_LAST, --- linux-wl.orig/net/wireless/nl80211.c +++ linux-wl/net/wireless/nl80211.c @@ -3105,6 +3105,8 @@ 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:
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> --- v2: renamed NL80211_BSS_AGE_MS to NL80211_BSS_SEEN_MS_AGO to underline that it's a relativene time