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Increase initial group key handshake retransmit timeout to 500 ms

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The 100 ms timeout on retransmitting group key message can be too short
for stations that are in power save mode or if there is a large number
of association stations. While the retransmission of the EAPOL-Key frame
should allow this to be recovered from, it is useful to avoid
unnecessary frames to save soem CPU and power.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2011-12-24 13:50:59 +02:00
parent 9c3c38db1e
commit 00338a4fe8
1 changed files with 5 additions and 3 deletions
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8
src/ap/wpa_auth.c
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@ -1,6 +1,6 @@
/*
* hostapd - IEEE 802.11i-2004 / WPA Authenticator
* Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
* IEEE 802.11 RSN / WPA Authenticator
* Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -52,6 +52,7 @@ static const u32 dot11RSNAConfigGroupUpdateCount = 4;
static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
static const u32 eapol_key_timeout_first = 100; /* ms */
static const u32 eapol_key_timeout_subseq = 1000; /* ms */
static const u32 eapol_key_timeout_first_group = 500; /* ms */
/* TODO: make these configurable */
static const int dot11RSNAConfigPMKLifetime = 43200;
@ -1336,7 +1337,8 @@ static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
if (ctr == 1 && wpa_auth->conf.tx_status)
timeout_ms = eapol_key_timeout_first;
timeout_ms = pairwise ? eapol_key_timeout_first :
eapol_key_timeout_first_group;
else
timeout_ms = eapol_key_timeout_subseq;
if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))