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Re: Wifi-Event for when initial 4-way completes?

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On 06/08/2017 08:21 AM, Ben Greear wrote:
On 06/07/2017 12:25 AM, Wojciech Dubowik wrote:
Hello Ben,

I have been using this part of wpa_supplicant to notify that 4-Way handshake is completed.

around line 868 in wpa_supplicant.c

#if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
                wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
                        MACSTR " completed [id=%d id_str=%s%s]",
                        MAC2STR(wpa_s->bssid),
                        ssid ? ssid->id : -1,
                        ssid && ssid->id_str ? ssid->id_str : "",
                        fils_hlp_sent ? " FILS_HLP_SENT" : "");
#endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */

You can pack whatever notification message inside the if statement.

I'm not sure that actually is correct?  For instance, I see this in a case where
WPA-2 was not succesfully negotiated (note the reason-2 disconnect)

IFNAME=sta9 <3>SME: Trying to authenticate with 00:0e:8e:f8:73:96 (SSID='ota-9k-2 space' freq=5180 MHz)
IFNAME=sta9 <3>Trying to associate with 00:0e:8e:f8:73:96 (SSID='ota-9k-2 space' freq=5180 MHz)
IFNAME=sta9 <3>Associated with 00:0e:8e:f8:73:96
IFNAME=sta9 <3>CTRL-EVENT-SUBNET-STATUS-UPDATE status=0
IFNAME=sta9 <3>WPA: Key negotiation completed with 00:0e:8e:f8:73:96 [PTK=CCMP GTK=CCMP]
IFNAME=sta9 <3>CTRL-EVENT-CONNECTED - Connection to 00:0e:8e:f8:73:96 completed [id=0 id_str=]
IFNAME=sta9 <3>WPA: Key negotiation completed with 00:0e:8e:f8:73:96 [PTK=CCMP GTK=CCMP]
IFNAME=sta9 <3>WPA: Key negotiation completed with 00:0e:8e:f8:73:96 [PTK=CCMP GTK=CCMP]
IFNAME=sta9 <3>WPA: Key negotiation completed with 00:0e:8e:f8:73:96 [PTK=CCMP GTK=CCMP]
IFNAME=sta9 <3>CTRL-EVENT-DISCONNECTED bssid=00:0e:8e:f8:73:96 reason=2


Looks like I might need to add another message about EAPOL 4-way completing?

Based on a sniff, it seems that the 3/4 was sent in this case, but the 4/4 was not
received from the AP.  Maybe the 3/4 is (re)sent incorrectly sometimes....I have run into similar
bugs in the past.

Thanks,
Ben


--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com




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