diff options
| author | Stefan Sperling <stsp@cvs.openbsd.org> | 2016-02-09 13:48:32 +0000 |
|---|---|---|
| committer | Stefan Sperling <stsp@cvs.openbsd.org> | 2016-02-09 13:48:32 +0000 |
| commit | fbddbef7d43c74238b38217eb1e543ce4f4c48b3 (patch) | |
| tree | 6772591b1e70b87beb6b692903aa0d63ee52e471 /sys | |
| parent | c142b696f675fa1c475c9811e27ad0ea539c172f (diff) | |
Log frames which fall outside the BlockAack window in dmesg if the
interface debug flag is set (enabled with: ifconfig iwn0 debug).
Shows the frame's sequence number and the current BA window.
I'm adding this for diagnosis, just in case it will be needed to make
future decisions about tuning the heuristic which works around network
stalls caused by such frames.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/net80211/ieee80211_input.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/net80211/ieee80211_input.c b/sys/net80211/ieee80211_input.c index e46c5135fef..5dc48198686 100644 --- a/sys/net80211/ieee80211_input.c +++ b/sys/net80211/ieee80211_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ieee80211_input.c,v 1.161 2016/02/08 01:00:47 stsp Exp $ */ +/* $OpenBSD: ieee80211_input.c,v 1.162 2016/02/09 13:48:31 stsp Exp $ */ /*- * Copyright (c) 2001 Atsushi Onoe @@ -728,6 +728,13 @@ ieee80211_input_ba(struct ieee80211com *ic, struct mbuf *m, * APs, which emit "sequence" numbers such as 1888, 1889, 2501, * 1890, 1891, ... all for the same TID. */ +#ifdef DIAGNOSTIC + if ((ifp->if_flags & IFF_DEBUG) && + ((sn - ba->ba_winend) & 0xfff) > 1) + printf("%s: received frame with bad sequence number " + "%d, expecting %d:%d\n", __func__, + sn, ba->ba_winstart, ba->ba_winend); +#endif if (((sn - ba->ba_winend) & 0xfff) > IEEE80211_BA_MAX_WINSZ) { if (ba->ba_winmiss < IEEE80211_BA_MAX_WINMISS) { if (ba->ba_missedsn == sn - 1) |