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P2P: Use best-overall channel in p2p_reselect_channel() 

Commit 50285f5ca8 ended up forcing channel
re-selection in number of cases where the peer would actually have
accepted our initial preference. Fix the parts related to best channel
information by using best_freq_overall as the highest priority and by
skipping the band changes if the peer supports the channel that we
picked since these were based on the assumption that
p2p_reselect_channel() is called only if the peer could not accept our
initial choice which is not the case anymore.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-03-14 16:05:47 +02:00 committed by Jouni Malinen
parent a70a52c316
commit 62e10e6e3d
1 changed files with 16 additions and 0 deletions
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16
src/p2p/p2p_go_neg.c
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@ -350,10 +350,24 @@ void p2p_reselect_channel(struct p2p_data *p2p,
u8 op_reg_class, op_channel;
unsigned int i;
if (p2p->best_freq_overall > 0 &&
p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_overall,
&op_reg_class, &op_channel) == 0 &&
p2p_channels_includes(intersection, op_reg_class, op_channel)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Pick best overall "
"channel (reg_class %u channel %u) from intersection",
op_reg_class, op_channel);
p2p->op_reg_class = op_reg_class;
p2p->op_channel = op_channel;
return;
}
/* First, try to pick the best channel from another band */
freq = p2p_channel_to_freq(p2p->cfg->country, p2p->op_reg_class,
p2p->op_channel);
if (freq >= 2400 && freq < 2500 && p2p->best_freq_5 > 0 &&
!p2p_channels_includes(intersection, p2p->op_reg_class,
p2p->op_channel) &&
p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_5,
&op_reg_class, &op_channel) == 0 &&
p2p_channels_includes(intersection, op_reg_class, op_channel)) {
@ -366,6 +380,8 @@ void p2p_reselect_channel(struct p2p_data *p2p,
}
if (freq >= 4900 && freq < 6000 && p2p->best_freq_24 > 0 &&
!p2p_channels_includes(intersection, p2p->op_reg_class,
p2p->op_channel) &&
p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_24,
&op_reg_class, &op_channel) == 0 &&
p2p_channels_includes(intersection, op_reg_class, op_channel)) {