From 4e9ed2d686dc4145f72ce1ad4e21f8f87aa60aa6 Mon Sep 17 00:00:00 2001
From: Andrew Zaborowski <andrew.zaborowski@intel.com>
Date: Sat, 15 Apr 2017 13:58:47 +0200
Subject: [PATCH] eapol: Add eapol_start_preauthentication

Add a wrapper for eapol_start that sets the sm->preauth flag and sends
the EAPOL-Start frame immediately to skip the timeout since we know
that the supplicant has to initiate the authentication.
---
 src/eapol.c | 16 ++++++++++++++++
 src/eapol.h |  1 +
 2 files changed, 17 insertions(+)

diff --git a/src/eapol.c b/src/eapol.c
index e11a90e2..e4698e32 100644
--- a/src/eapol.c
+++ b/src/eapol.c
@@ -728,6 +728,7 @@ struct eapol_sm {
 	bool have_replay:1;
 	bool started:1;
 	bool use_eapol_start:1;
+	bool preauth:1;
 	struct eap_state *eap;
 	struct eapol_buffer *early_frame;
 };
@@ -1677,6 +1678,21 @@ eap_error:
 			(int) sm->handshake->ifindex);
 }
 
+void eapol_start_preauthentication(struct eapol_sm *sm)
+{
+	/*
+	 * The only difference here is that we send the EAPOL-Start immeditely
+	 * instead of in a timeout, and we set sm->preauth so that pae_write
+	 * uses the preauthentication protocol id.
+	 */
+
+	sm->use_eapol_start = false;
+	sm->preauth = true;
+
+	eapol_start(sm);
+	send_eapol_start(NULL, sm);
+}
+
 bool eapol_init()
 {
 	state_machines = l_queue_new();
diff --git a/src/eapol.h b/src/eapol.h
index 3afb0813..651aadc6 100644
--- a/src/eapol.h
+++ b/src/eapol.h
@@ -182,6 +182,7 @@ void eapol_sm_set_event_func(struct eapol_sm *sm, eapol_sm_event_func_t func);
 
 void eapol_register(struct eapol_sm *sm);
 void eapol_start(struct eapol_sm *sm);
+void eapol_start_preauthentication(struct eapol_sm *sm);
 
 void eapol_pae_open();
 void eapol_pae_close();