Added a message method to set the "higher version supported" flag

src/libcharon/encoding/message.c

@@ -490,6 +490,11 @@ struct private_message_t {
 	 */
 	bool is_request;
 
+	/**
+	 * Higher version supported?
+	 */
+	bool version_flag;
+
 	/**
 	 * Reserved bits in IKE header
 	 */
@@ -658,6 +663,12 @@ METHOD(message_t, get_request, bool,
 	return this->is_request;
 }
 
+METHOD(message_t, set_version_flag, void,
+	private_message_t *this)
+{
+	this->version_flag = TRUE;
+}
+
 METHOD(message_t, get_reserved_header_bit, bool,
 	private_message_t *this, u_int nr)
 {
@@ -1105,6 +1116,7 @@ METHOD(message_t, generate, status_t,
 	ike_header->set_exchange_type(ike_header, this->exchange_type);
 	ike_header->set_message_id(ike_header, this->message_id);
 	ike_header->set_response_flag(ike_header, !this->is_request);
+	ike_header->set_version_flag(ike_header, this->version_flag);
 	ike_header->set_initiator_flag(ike_header,
 						this->ike_sa_id->is_initiator(this->ike_sa_id));
 	ike_header->set_initiator_spi(ike_header,
@@ -1497,6 +1509,7 @@ message_t *message_create_from_packet(packet_t *packet)
 			.get_first_payload_type = _get_first_payload_type,
 			.set_request = _set_request,
 			.get_request = _get_request,
+			.set_version_flag = _set_version_flag,
 			.get_reserved_header_bit = _get_reserved_header_bit,
 			.set_reserved_header_bit = _set_reserved_header_bit,
 			.add_payload = _add_payload,

src/libcharon/encoding/message.h

@@ -153,6 +153,11 @@ struct message_t {
 	 */
 	bool (*get_request) (message_t *this);
 
+	/**
+	 * Set the version flag in the IKE header.
+	 */
+	void (*set_version_flag)(message_t *this);
+
 	/**
 	 * Get a reserved bit in the IKE header.
 	 *

src/libcharon/encoding/payloads/ike_header.c

@@ -292,6 +292,12 @@ METHOD(ike_header_t, get_version_flag, bool,
 	return this->flags.version;
 }
 
+METHOD(ike_header_t, set_version_flag, void,
+	private_ike_header_t *this, bool version)
+{
+	this->flags.version = version;
+}
+
 METHOD(ike_header_t, get_initiator_flag, bool,
 	private_ike_header_t *this)
 {
@@ -363,6 +369,7 @@ ike_header_t *ike_header_create()
 			.get_response_flag = _get_response_flag,
 			.set_response_flag = _set_response_flag,
 			.get_version_flag = _get_version_flag,
+			.set_version_flag = _set_version_flag,
 			.get_initiator_flag = _get_initiator_flag,
 			.set_initiator_flag = _set_initiator_flag,
 			.get_exchange_type = _get_exchange_type,

src/libcharon/encoding/payloads/ike_header.h

@@ -176,6 +176,7 @@ struct ike_header_t {
 	 * @param response		response flag
 	 */
 	void (*set_response_flag) (ike_header_t *this, bool response);
+
 	/**
 	 * Get "higher version supported"-flag.
 	 *
@@ -183,6 +184,13 @@ struct ike_header_t {
 	 */
 	bool (*get_version_flag) (ike_header_t *this);
 
+	/**
+	 * Set the "higher version supported"-flag.
+	 *
+	 * @param version		flag value
+	 */
+	void (*set_version_flag)(ike_header_t *this, bool version);
+
 	/**
 	 * Get the initiator flag.
 	 *