Date: Fri, 8 Feb 2008 23:21:51 GMT From: Sam Leffler <sam@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 135071 for review Message-ID: <200802082321.m18NLpX7019499@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=135071 Change 135071 by sam@sam_ebb on 2008/02/08 23:21:23 correct HT protection handling of overlapping bss; need to give MIXED precedence over PROTOPT; this also fixes an issue with our bouncing between MIXED and PROTOPT on each beacon we received from an overlapping legacy bss Affected files ... .. //depot/projects/vap/sys/net80211/ieee80211_hostap.c#10 edit .. //depot/projects/vap/sys/net80211/ieee80211_ht.c#8 edit Differences ... ==== //depot/projects/vap/sys/net80211/ieee80211_hostap.c#10 (text+ko) ==== @@ -1728,15 +1728,14 @@ break; } if (scan.htinfo == NULL) { - ic->ic_flags_ext |= IEEE80211_FEXT_NONHT_PR; - ic->ic_lastnonht = ticks; - ieee80211_htinfo_update(ic, + ieee80211_htprot_update(ic, IEEE80211_HTINFO_OPMODE_PROTOPT | IEEE80211_HTINFO_NONHT_PRESENT); } else if (ishtmixed(scan.htinfo)) { - /* XXX propagate HT20PR too? */ - ieee80211_htinfo_update(ic, - IEEE80211_HTINFO_OPMODE_MIXED); + /* XXX? take NONHT_PRESENT from beacon? */ + ieee80211_htprot_update(ic, + IEEE80211_HTINFO_OPMODE_MIXED | + IEEE80211_HTINFO_NONHT_PRESENT); } } break; ==== //depot/projects/vap/sys/net80211/ieee80211_ht.c#8 (text+ko) ==== @@ -930,12 +930,12 @@ { uint8_t protmode; - if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { + if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { + protmode = IEEE80211_HTINFO_OPMODE_MIXED + | IEEE80211_HTINFO_NONHT_PRESENT; + } else if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { protmode = IEEE80211_HTINFO_OPMODE_PROTOPT - | IEEE80211_HTINFO_NONHT_PRESENT; - } else if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { - protmode = IEEE80211_HTINFO_OPMODE_MIXED - | IEEE80211_HTINFO_NONHT_PRESENT; + | IEEE80211_HTINFO_NONHT_PRESENT; } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { @@ -987,15 +987,36 @@ /* * Public version of htinfo_update; used for processing - * beacon frames from overlapping bss in hostap_recv_mgmt. + * beacon frames from overlapping bss. + * + * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED + * (on receipt of a beacon that advertises MIXED) or + * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon + * from an overlapping legacy bss). We treat MIXED with + * a higher precedence than PROTOPT (i.e. we will not change + * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This + * corresponds to how we handle things in htinfo_update. */ void -ieee80211_htinfo_update(struct ieee80211com *ic, int protmode) +ieee80211_htprot_update(struct ieee80211com *ic, int protmode) { - if (protmode != ic->ic_curhtprotmode) { - ic->ic_curhtprotmode = protmode; - htinfo_notify(ic); - } +#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) + if (protmode == ic->ic_curhtprotmode) + return; + if (OPMODE(ic->ic_curhtprotmode) == IEEE80211_HTINFO_OPMODE_MIXED && + OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT) + return; + + /* track non-HT station presence */ + KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, + ("missing NONHT_PRESENT")); + ic->ic_flags_ext |= IEEE80211_FEXT_NONHT_PR; + ic->ic_lastnonht = ticks; + + /* push beacon update */ + ic->ic_curhtprotmode = protmode; + htinfo_notify(ic); +#undef OPMODE } /*
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