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P2P: Allow P2P CSA from 5 GHz to 2.4 GHz band

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IEEE Std 802.11-2020, 11.8.8 (Selecting and advertising a new channel)
doesn't restrict switching to a channel which is not in the same band as
the current band. But at the same time, there are some issues in
switching between the 2.4/5 GHz bands and the 6 GHz band. So limit the
check to consider the critical use case of switching from a 5 GHz channel
to a 2.4 GHz channel.

Signed-off-by: Sunil Ravi <sunilravi@google.com>
This commit is contained in:
Sunil 2022-07-19 22:04:39 +00:00 committed by Jouni Malinen
parent 6ef455db67
commit 7bdd3f2aa6
1 changed files with 9 additions and 3 deletions
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12
wpa_supplicant/p2p_supplicant.c
View file

@ -9667,9 +9667,15 @@ static int wpas_p2p_move_go_csa(struct wpa_supplicant *wpa_s)
goto out;
}
if (conf->hw_mode != wpa_s->ap_iface->current_mode->mode) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P CSA: CSA to a different band is not supported");
if (conf->hw_mode != wpa_s->ap_iface->current_mode->mode &&
(wpa_s->ap_iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A ||
is_6ghz_freq(wpa_s->ap_iface->freq) ||
conf->hw_mode != HOSTAPD_MODE_IEEE80211G)) {
wpa_dbg(wpa_s, MSG_INFO,
"P2P CSA: CSA from hardware mode %d%s to %d is not supported",
wpa_s->ap_iface->current_mode->mode,
is_6ghz_freq(wpa_s->ap_iface->freq) ? " (6 GHz)" : "",
conf->hw_mode);
ret = -1;
goto out;
}