From: Martin Willi <martin@revosec.ch>
Date: Wed, 24 Nov 2010 15:56:46 +0000 (+0100)
Subject: Added reserved bit mangling wrapper functions to message
X-Git-Tag: 4.5.1~237
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=166a2a45d9283f517a5e7e0d298a2670a27c229e;p=thirdparty%2Fstrongswan.git

Added reserved bit mangling wrapper functions to message
---

diff --git a/src/libcharon/encoding/message.c b/src/libcharon/encoding/message.c
index 6d4d458446..9d66df573f 100644
--- a/src/libcharon/encoding/message.c
+++ b/src/libcharon/encoding/message.c
@@ -490,6 +490,11 @@ struct private_message_t {
 	 */
 	bool is_request;
 
+	/**
+	 * Reserved bits in IKE header
+	 */
+	bool reserved[5];
+
 	/**
 	 * Sorting of message disabled?
 	 */
@@ -653,6 +658,25 @@ METHOD(message_t, get_request, bool,
 	return this->is_request;
 }
 
+METHOD(message_t, get_reserved_header_bit, bool,
+	private_message_t *this, u_int nr)
+{
+	if (nr < countof(this->reserved))
+	{
+		return this->reserved[nr];
+	}
+	return FALSE;
+}
+
+METHOD(message_t, set_reserved_header_bit, void,
+	private_message_t *this, u_int nr)
+{
+	if (nr < countof(this->reserved))
+	{
+		this->reserved[nr] = TRUE;
+	}
+}
+
 /**
  * Is this message in an encoded form?
  */
@@ -1030,6 +1054,8 @@ METHOD(message_t, generate, status_t,
 	chunk_t chunk;
 	char str[256];
 	u_int32_t *lenpos;
+	bool *reserved;
+	int i;
 
 	if (is_encoded(this))
 	{	/* already generated, return a new packet clone */
@@ -1086,6 +1112,16 @@ METHOD(message_t, generate, status_t,
 	ike_header->set_responder_spi(ike_header,
 						this->ike_sa_id->get_responder_spi(this->ike_sa_id));
 
+	for (i = 0; i < countof(this->reserved); i++)
+	{
+		reserved = payload_get_field(&ike_header->payload_interface,
+									 RESERVED_BIT, i);
+		if (reserved)
+		{
+			*reserved = this->reserved[i];
+		}
+	}
+
 	generator = generator_create();
 
 	/* generate all payloads with proper next type */
@@ -1154,6 +1190,8 @@ METHOD(message_t, parse_header, status_t,
 {
 	ike_header_t *ike_header;
 	status_t status;
+	bool *reserved;
+	int i;
 
 	DBG2(DBG_ENC, "parsing header of message");
 
@@ -1188,7 +1226,15 @@ METHOD(message_t, parse_header, status_t,
 	this->minor_version = ike_header->get_min_version(ike_header);
 	this->first_payload = ike_header->payload_interface.get_next_type(
 												&ike_header->payload_interface);
-
+	for (i = 0; i < countof(this->reserved); i++)
+	{
+		reserved = payload_get_field(&ike_header->payload_interface,
+									 RESERVED_BIT, i);
+		if (reserved)
+		{
+			this->reserved[i] = *reserved;
+		}
+	}
 	DBG2(DBG_ENC, "parsed a %N %s", exchange_type_names, this->exchange_type,
 		 this->is_request ? "request" : "response");
 
@@ -1451,6 +1497,8 @@ 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,
+			.get_reserved_header_bit = _get_reserved_header_bit,
+			.set_reserved_header_bit = _set_reserved_header_bit,
 			.add_payload = _add_payload,
 			.add_notify = _add_notify,
 			.disable_sort = _disable_sort,
diff --git a/src/libcharon/encoding/message.h b/src/libcharon/encoding/message.h
index 7db9e01543..0cc00acba1 100644
--- a/src/libcharon/encoding/message.h
+++ b/src/libcharon/encoding/message.h
@@ -153,6 +153,21 @@ struct message_t {
 	 */
 	bool (*get_request) (message_t *this);
 
+	/**
+	 * Get a reserved bit in the IKE header.
+	 *
+	 * @param nr			reserved bit to get in IKE header, 0-4
+	 * @return				TRUE if bit is set
+	 */
+	bool (*get_reserved_header_bit)(message_t *this, u_int nr);
+
+	/**
+	 * Set a reserved bit in the IKE header.
+	 *
+	 * @param nr			reserved bit to set in IKE header, 0-4
+	 */
+	void (*set_reserved_header_bit)(message_t *this, u_int nr);
+
 	/**
 	 * Append a payload to the message.
 	 *