max max_message_count configurable and move it into tls_eap_t

src/libcharon/plugins/eap_tls/eap_tls.c

@@ -32,11 +32,6 @@ struct private_eap_tls_t {
 	 */
 	eap_tls_t public;
 
-	/**
-	 * Number of EAP-TLS messages processed so far
-	 */
-	int processed;
-
 	/**
 	 * TLS stack, wrapped by EAP helper
 	 */
@@ -68,12 +63,6 @@ METHOD(eap_method_t, process, status_t,
 	status_t status;
 	chunk_t data;
 
-	if (++this->processed > MAX_MESSAGE_COUNT)
-	{
-		DBG1(DBG_IKE, "EAP-TLS packet count exceeded (%d > %d)",
-			 this->processed, MAX_MESSAGE_COUNT);
-		return FAILED;
-	}
 	data = in->get_data(in);
 	status = this->tls_eap->process(this->tls_eap, data, &data);
 	if (status == NEED_MORE)
@@ -123,6 +112,7 @@ static eap_tls_t *eap_tls_create(identification_t *server,
 {
 	private_eap_tls_t *this;
 	size_t frag_size;
+	int max_msg_count;
 	tls_t *tls;
 
 	INIT(this,
@@ -140,8 +130,10 @@ static eap_tls_t *eap_tls_create(identification_t *server,
 
 	frag_size = lib->settings->get_int(lib->settings,
 					"charon.plugins.eap-tls.fragment_size", MAX_FRAGMENT_LEN);
+	max_msg_count = lib->settings->get_int(lib->settings,
+					"charon.plugins.eap-tls.max_message_count", MAX_MESSAGE_COUNT);
 	tls = tls_create(is_server, server, peer, TLS_PURPOSE_EAP_TLS, NULL);
-	this->tls_eap = tls_eap_create(EAP_TLS, tls, frag_size);
+	this->tls_eap = tls_eap_create(EAP_TLS, tls, frag_size, max_msg_count);
 	if (!this->tls_eap)
 	{
 		free(this);

src/libcharon/plugins/eap_tnc/eap_tnc.c

@@ -33,11 +33,6 @@ struct private_eap_tnc_t {
 	 */
 	eap_tnc_t public;
 
-	/**
-	 * Number of EAP-TNC messages processed so far
-	 */
-	int processed;
-
 	/**
 	 * TLS stack, wrapped by EAP helper
 	 */
@@ -70,12 +65,6 @@ METHOD(eap_method_t, process, status_t,
 	status_t status;
 	chunk_t data;
 
-	if (++this->processed > MAX_MESSAGE_COUNT)
-	{
-		DBG1(DBG_IKE, "EAP-TNC packet count exceeded (%d > %d)",
-			 this->processed, MAX_MESSAGE_COUNT);
-		return FAILED;
-	}
 	data = in->get_data(in);
 	status = this->tls_eap->process(this->tls_eap, data, &data);
 	if (status == NEED_MORE)
@@ -125,6 +114,7 @@ static eap_tnc_t *eap_tnc_create(identification_t *server,
 {
 	private_eap_tnc_t *this;
 	size_t frag_size;
+	int max_msg_count;
 	tls_t *tnc_if_tnccs;
 
 	INIT(this,
@@ -142,8 +132,10 @@ static eap_tnc_t *eap_tnc_create(identification_t *server,
 
 	frag_size = lib->settings->get_int(lib->settings,
 					"charon.plugins.eap-tnc.fragment_size", MAX_FRAGMENT_LEN);
+	max_msg_count = lib->settings->get_int(lib->settings,
+					"charon.plugins.eap-tnc.max_message_count", MAX_MESSAGE_COUNT);
 	tnc_if_tnccs = tnc_if_tnccs_create(is_server, TLS_PURPOSE_EAP_TNC);
-	this->tls_eap = tls_eap_create(EAP_TNC, tnc_if_tnccs, frag_size);
+	this->tls_eap = tls_eap_create(EAP_TNC, tnc_if_tnccs, frag_size, max_msg_count);
 	if (!this->tls_eap)
 	{
 		free(this);

src/libcharon/plugins/eap_ttls/eap_ttls.c

@@ -34,11 +34,6 @@ struct private_eap_ttls_t {
 	 */
 	eap_ttls_t public;
 
-	/**
-	 * Number of EAP-TLS messages processed so far
-	 */
-	int processed;
-
 	/**
 	 * TLS stack, wrapped by EAP helper
 	 */
@@ -70,12 +65,6 @@ METHOD(eap_method_t, process, status_t,
 	status_t status;
 	chunk_t data;
 
-	if (++this->processed > MAX_MESSAGE_COUNT)
-	{
-		DBG1(DBG_IKE, "EAP-TTLS packet count exceeded (%d > %d)",
-			 this->processed, MAX_MESSAGE_COUNT);
-		return FAILED;
-	}
 	data = in->get_data(in);
 	status = this->tls_eap->process(this->tls_eap, data, &data);
 	if (status == NEED_MORE)
@@ -126,6 +115,7 @@ static eap_ttls_t *eap_ttls_create(identification_t *server,
 {
 	private_eap_ttls_t *this;
 	size_t frag_size;
+	int max_msg_count;
 	tls_t *tls;
 
 	INIT(this,
@@ -147,8 +137,10 @@ static eap_ttls_t *eap_ttls_create(identification_t *server,
 	}
 	frag_size = lib->settings->get_int(lib->settings,
 					"charon.plugins.eap-ttls.fragment_size", MAX_FRAGMENT_LEN);
+	max_msg_count = lib->settings->get_int(lib->settings,
+					"charon.plugins.eap-ttls.max_message_count", MAX_MESSAGE_COUNT);
 	tls = tls_create(is_server, server, peer, TLS_PURPOSE_EAP_TTLS, application);
-	this->tls_eap = tls_eap_create(EAP_TTLS, tls, frag_size);
+	this->tls_eap = tls_eap_create(EAP_TTLS, tls, frag_size, max_msg_count);
 	if (!this->tls_eap)
 	{
 		application->destroy(application);

src/libtls/tls_eap.c

@@ -36,7 +36,7 @@ struct private_tls_eap_t {
 	tls_eap_t public;
 
 	/**
-	 * Type of EAP method, EAP-TLS or EAP-TTLS
+	 * Type of EAP method, EAP-TLS, EAP-TTLS, or EAP-TNC
 	 */
 	eap_type_t type;
 
@@ -59,6 +59,16 @@ struct private_tls_eap_t {
 	 * Maximum size of an outgoing EAP-TLS fragment
 	 */
 	size_t frag_size;
+
+	/**
+	 * Number of EAP messages/fragments processed so far
+	 */
+	int processed;
+
+	/**
+	 * Maximum number of processed EAP messages/fragments 
+	 */
+	int max_msg_count;
 };
 
 /**
@@ -251,6 +261,14 @@ METHOD(tls_eap_t, process, status_t,
 	eap_tls_packet_t *pkt;
 	status_t status;
 
+	if (++this->processed > this->max_msg_count)
+	{
+		DBG1(DBG_IKE, "%N packet count exceeded (%d > %d)",
+			 eap_type_names, this->type,
+			 this->processed, this->max_msg_count);
+		return FAILED;
+	}
+
 	pkt = (eap_tls_packet_t*)in.ptr;
 	if (in.len < sizeof(eap_tls_packet_t) ||
 		untoh16(&pkt->length) != in.len)
@@ -321,7 +339,8 @@ METHOD(tls_eap_t, destroy, void,
 /**
  * See header
  */
-tls_eap_t *tls_eap_create(eap_type_t type, tls_t *tls, size_t frag_size)
+tls_eap_t *tls_eap_create(eap_type_t type, tls_t *tls, size_t frag_size,
+						  int max_msg_count)
 {
 	private_tls_eap_t *this;
 
@@ -341,6 +360,7 @@ tls_eap_t *tls_eap_create(eap_type_t type, tls_t *tls, size_t frag_size)
 		.is_server = tls->is_server(tls),
 		.first_fragment = TRUE,
 		.frag_size = frag_size,
+		.max_msg_count = max_msg_count,
 		.tls = tls,
 	);
 

src/libtls/tls_eap.h

@@ -73,7 +73,9 @@ struct tls_eap_t {
  * @param type				EAP type, EAP-TLS or EAP-TTLS
  * @param tls				TLS implementation
  * @param frag_size			maximum size of a TLS fragment we send
+ * @param max_msg_count		maximum number of processed messages
  */
-tls_eap_t *tls_eap_create(eap_type_t type, tls_t *tls, size_t frag_size);
+tls_eap_t *tls_eap_create(eap_type_t type, tls_t *tls, size_t frag_size,
+						  int max_msg_count);
 
 #endif /** TLS_EAP_H_ @}*/