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P2P: Fallback to GO negotiation after running out of GO scan attempts

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We found a problem that p2p_fallback_to_go_neg is not handled correctly
after running out of GO scan attempts. When autojoin is enabled and a
group is found in old scan results, supplicant would try to scan the
group several times. If the group is still not found, it reports group
formation failure while p2p_fallback_to_go_neg is enabled already.

If p2p_fallback_to_go_neg is enabled, it should fallback to GO
negotiation, but not report group formation failure after running out of
GO scan attempts.

Signed-off-by: Jimmy Chen <jimmycmchen@google.com>
This commit is contained in:
Jimmy Chen 2020-09-02 16:50:11 +08:00 committed by Jouni Malinen
parent 1a0169695b
commit 0e9f62e514
1 changed files with 9 additions and 0 deletions
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9
wpa_supplicant/p2p_supplicant.c
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@ -4977,6 +4977,15 @@ static void wpas_p2p_check_join_scan_limit(struct wpa_supplicant *wpa_s)
MAC2STR(wpa_s->pending_join_dev_addr));
return;
}
if (wpa_s->p2p_fallback_to_go_neg) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Join operation failed - fall back to GO Negotiation");
wpa_msg_global(wpa_s->p2pdev, MSG_INFO,
P2P_EVENT_FALLBACK_TO_GO_NEG
"reason=join-failed");
wpas_p2p_fallback_to_go_neg(wpa_s, 0);
return;
}
wpa_msg_global(wpa_s->p2pdev, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_FAILURE);
wpas_notify_p2p_group_formation_failure(wpa_s, "");