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authorStanislaw Gruszka <sgruszka@redhat.com>2010-04-28 09:17:03 -0400
committerJohn W. Linville <linville@tuxdriver.com>2010-04-28 16:50:28 -0400
commitf0b058b61711ebf5be94d6865ca7b2c259b71d37 (patch)
treefa8e96ce04ad161b0f4fb6573a43edc449623e05 /net/mac80211
parentf7f7cc47fce6f01c3d3374c51508859c328ad5b2 (diff)
mac80211: do not wip out old supported rates
Use old supported rates, if AP do not provide supported rates information element in a new managment frame. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/scan.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 2b1f1f3d6a5..a9d40584e38 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -84,7 +84,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
84{ 84{
85 struct cfg80211_bss *cbss; 85 struct cfg80211_bss *cbss;
86 struct ieee80211_bss *bss; 86 struct ieee80211_bss *bss;
87 int clen; 87 int clen, srlen;
88 s32 signal = 0; 88 s32 signal = 0;
89 89
90 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 90 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
@@ -113,23 +113,24 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
113 bss->dtim_period = tim_ie->dtim_period; 113 bss->dtim_period = tim_ie->dtim_period;
114 } 114 }
115 115
116 bss->supp_rates_len = 0; 116 /* replace old supported rates if we get new values */
117 srlen = 0;
117 if (elems->supp_rates) { 118 if (elems->supp_rates) {
118 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; 119 clen = IEEE80211_MAX_SUPP_RATES;
119 if (clen > elems->supp_rates_len) 120 if (clen > elems->supp_rates_len)
120 clen = elems->supp_rates_len; 121 clen = elems->supp_rates_len;
121 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates, 122 memcpy(bss->supp_rates, elems->supp_rates, clen);
122 clen); 123 srlen += clen;
123 bss->supp_rates_len += clen;
124 } 124 }
125 if (elems->ext_supp_rates) { 125 if (elems->ext_supp_rates) {
126 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; 126 clen = IEEE80211_MAX_SUPP_RATES - srlen;
127 if (clen > elems->ext_supp_rates_len) 127 if (clen > elems->ext_supp_rates_len)
128 clen = elems->ext_supp_rates_len; 128 clen = elems->ext_supp_rates_len;
129 memcpy(&bss->supp_rates[bss->supp_rates_len], 129 memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen);
130 elems->ext_supp_rates, clen); 130 srlen += clen;
131 bss->supp_rates_len += clen;
132 } 131 }
132 if (srlen)
133 bss->supp_rates_len = srlen;
133 134
134 bss->wmm_used = elems->wmm_param || elems->wmm_info; 135 bss->wmm_used = elems->wmm_param || elems->wmm_info;
135 bss->uapsd_supported = is_uapsd_supported(elems); 136 bss->uapsd_supported = is_uapsd_supported(elems);