[PATCH] Speed up connection time during ASSOC retry
Jithu Jance
jithujance
Thu Jun 14 03:45:10 PDT 2012
Hi Jouni,
> This should probably not be run with WPA_DRIVER_FLAGS_SME..
> wpa_supplicant_deauthenticate() would sound more appropriate in this
> case since association was rejected.
Thanks for pointing these out.
> This could use wpas_connection_failed() to remain consistent with other
> similar connection failure cases..
I found this while testing P2P connection scenario and I didn't want to
backlist the ssid which would
further delay the connection process. Is it fine to same approach for P2P
and STA in this case? or should we
use wpas_connection_failed() for STA alone? I also added code to disable
the network and remove the p2p_group,
if the retries reached the threshold. This code so far is working for me.
But not sure whether I have
covered all the cases properly. Request your opinion.
I shall generate a patch, If you feel this is okay. Please find the updated
code below.
void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
union wpa_event_data *data)
...
...
case EVENT_ASSOC_REJECT:
if (data->assoc_reject.bssid)
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
"bssid=" MACSTR " status_code=%u",
MAC2STR(data->assoc_reject.bssid),
data->assoc_reject.status_code);
else
wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
"status_code=%u",
data->assoc_reject.status_code);
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
sme_event_assoc_reject(wpa_s, data);
else {
if(!wpa_s->current_ssid) {
wpa_printf(MSG_ERROR, "current_ssid == NULL");
break;
}
/* If assoc reject is reported by the driver, then avoid
* waiting for the authentication timeout. Cancel the
* authentication timeout and retry the assoc.
*/
if(wpa_s->current_ssid->assoc_retry++ < 5) {
wpa_printf(MSG_ERROR, "Retrying assoc: %d ",
wpa_s->current_ssid->assoc_retry);
wpa_supplicant_cancel_auth_timeout(wpa_s);
/* Clear the states */
wpa_sm_notify_disassoc(wpa_s->wpa);
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 1, 0);
} else {
/* If we ASSOC_REJECT's hits threshold, disable the
* network
*/
wpa_printf(MSG_ERROR, "Assoc retry threshold reached. "
"Disabling the network");
wpa_supplicant_disable_network(wpa_s, wpa_s->current_ssid);
#ifdef CONFIG_P2P
if(wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE)
wpas_p2p_group_remove(wpa_s, wpa_s->ifname);
#endif
}
}
break;
* ...*
* ...*
*}*
*
*
*
*
*- Jithu Jance*
On Sat, Jun 9, 2012 at 5:17 PM, Jouni Malinen <j at w1.fi> wrote:
> On Mon, May 21, 2012 at 06:24:31AM +0000, Jithu Jance wrote:
> > In current implementation, authentication timer continues to run even
> after the
> > driver has reported ASSOC_REJECT. Then the association is retried on
> authentication
> > timeout which is 10secs.
>
> This is actually not the case for SME-in-wpa_supplicant, i.e., this
> patch did not change anything for my mac80211_hwsim test.. As such, this
> change should probably be conditional on WPA_DRIVER_FLAGS_SME not being
> set..
>
> > The below patch cancels the authentication timeout on ASSOC_REJECT and
> initiates an
> > scan for association. Kindly see whether the patch is fine.
>
> The patch was whitespace damaged (tabs converted to spaces).
>
> > diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
> > @@ -2238,6 +2238,25 @@ void wpa_supplicant_event(void *ctx, enum
> wpa_event_type event,
> > if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
> > sme_event_assoc_reject(wpa_s, data);
> > +
> > + /* If assoc reject is reported by the driver, then avoid
>
> sme_event_assoc_reject() handles this with similar mechanism to initiate
> new attempt immediately.
>
> > + * waiting for the authentication timeout. Cancel the
> > + * authentication timeout and retry the assoc.
> > + */
> > + if(wpa_s->assoc_retries++ < 3) {
>
> This should probably not be run with WPA_DRIVER_FLAGS_SME..
>
> > + wpa_printf(MSG_ERROR, "Retrying assoc "
> > + "Iteration:%d", wpa_s->assoc_retries);
> > + wpa_supplicant_cancel_auth_timeout(wpa_s);
> > +
> > + /* Clear the states */
> > + wpa_sm_notify_disassoc(wpa_s->wpa);
> > + wpa_supplicant_disassociate(wpa_s,
> WLAN_REASON_DEAUTH_LEAVING);
>
> wpa_supplicant_deauthenticate() would sound more appropriate in this
> case since association was rejected.
>
> > + wpa_s->reassociate = 1;
> > + wpa_supplicant_req_scan(wpa_s, 1, 0);
>
> This could use wpas_connection_failed() to remain consistent with other
> similar connection failure cases..
>
>
> I have not tested this, but something like this could handle this a bit
> more cleanly. Could you please check whether this works in the case you
> are seeing?
>
>
> diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
> index d09be6c..0b4feb8 100644
> --- a/wpa_supplicant/events.c
> +++ b/wpa_supplicant/events.c
> @@ -2320,6 +2320,27 @@ void wpa_supplicant_event(void *ctx, enum
> wpa_event_type event,
> data->assoc_reject.status_code);
> if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
> sme_event_assoc_reject(wpa_s, data);
> + else if (wpa_s->assoc_retries++ < 3) {
> + /*
> + * If association reject is reported by the driver,
> + * avoid waiting for the authentication timeout.
> Cancel
> + * the authentication timeout and retry the
> + * association.
> + */
> + wpa_printf(MSG_DEBUG, "Retrying association "
> + "(iteration %d)", wpa_s->assoc_retries);
> +
> + /* Clear the state */
> + wpa_sm_notify_disassoc(wpa_s->wpa);
> + wpa_supplicant_deauthenticate(
> + wpa_s, WLAN_REASON_DEAUTH_LEAVING);
> +
> + wpa_s->reassociate = 1;
> + wpas_connection_failed(wpa_s,
> + data->assoc_reject.bssid);
> + } else {
> + wpa_s->assoc_retries = 0;
> + }
> break;
> case EVENT_AUTH_TIMED_OUT:
> if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
> diff --git a/wpa_supplicant/wpa_supplicant.c
> b/wpa_supplicant/wpa_supplicant.c
> index 3cb954d..fdfcc5d 100644
> --- a/wpa_supplicant/wpa_supplicant.c
> +++ b/wpa_supplicant/wpa_supplicant.c
> @@ -587,6 +587,9 @@ void wpa_supplicant_set_state(struct wpa_supplicant
> *wpa_s,
> wpa_supplicant_state_txt(wpa_s->wpa_state),
> wpa_supplicant_state_txt(state));
>
> + if (state == WPA_ASSOCIATED || state <= WPA_INACTIVE)
> + wpa_s->assoc_retries = 0;
> +
> if (state != WPA_SCANNING)
> wpa_supplicant_notify_scanning(wpa_s, 0);
>
> @@ -3199,8 +3202,11 @@ void wpas_connection_failed(struct wpa_supplicant
> *wpa_s, const u8 *bssid)
> * either not available or has already been tried, so that we can
> start
> * increasing the delay here to avoid constant scanning.
> */
> - count = wpa_blacklist_add(wpa_s, bssid);
> - if (count == 1 && wpa_s->current_bss) {
> + if (bssid)
> + count = wpa_blacklist_add(wpa_s, bssid);
> + else
> + count = 3;
> + if (count == 1 && wpa_s->current_bss && bssid) {
> /*
> * This BSS was not in the blacklist before. If there is
> * another BSS available for the same ESS, we should try
> that
> diff --git a/wpa_supplicant/wpa_supplicant_i.h
> b/wpa_supplicant/wpa_supplicant_i.h
> index 84e8fa4..50eef00 100644
> --- a/wpa_supplicant/wpa_supplicant_i.h
> +++ b/wpa_supplicant/wpa_supplicant_i.h
> @@ -286,6 +286,7 @@ struct wpa_supplicant {
> struct wpa_bss *current_bss;
> int ap_ies_from_associnfo;
> unsigned int assoc_freq;
> + unsigned int assoc_retries;
>
> /* Selected configuration (based on Beacon/ProbeResp WPA IE) */
> int pairwise_cipher;
>
> --
> Jouni Malinen PGP id EFC895FA
> _______________________________________________
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> HostAP at lists.shmoo.com
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>
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