Implemented a hook to set reserved bits

src/conftest/Makefile.am

@@ -9,7 +9,7 @@ conftest_SOURCES = conftest.c conftest.h config.c config.h actions.c actions.h \
 	hooks/set_ike_version.c hooks/pretend_auth.c hooks/set_length.c \
 	hooks/log_proposals.c hooks/set_proposal_number.c hooks/log_ke.c \
 	hooks/log_id.c hooks/custom_proposal.c hooks/set_ike_spi.c \
-	hooks/set_ike_request.c
+	hooks/set_ike_request.c hooks/set_reserved.c
 
 INCLUDES = \
 	-I$(top_srcdir)/src/libstrongswan \

src/conftest/hooks/set_reserved.c

@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "hook.h"
+
+#include <encoding/payloads/unknown_payload.h>
+
+typedef struct private_set_reserved_t private_set_reserved_t;
+
+/**
+ * Private data of an set_reserved_t object.
+ */
+struct private_set_reserved_t {
+
+	/**
+	 * Implements the hook_t interface.
+	 */
+	hook_t hook;
+
+	/**
+	 * Alter requests or responses?
+	 */
+	bool req;
+
+	/**
+	 * ID of message to alter.
+	 */
+	int id;
+
+	/**
+	 * Hook name
+	 */
+	char *name;
+};
+
+METHOD(listener_t, message, bool,
+	private_set_reserved_t *this, ike_sa_t *ike_sa, message_t *message,
+	bool incoming)
+{
+	if (!incoming &&
+		message->get_request(message) == this->req &&
+		message->get_message_id(message) == this->id)
+	{
+		enumerator_t *bits, *bytes, *types, *payloads;
+		payload_type_t type;
+		payload_t *payload;
+		char *nr, *name;
+		bool *bit;
+		u_int8_t *byte, byteval;
+
+		types = conftest->test->create_section_enumerator(conftest->test,
+													"hooks.%s", this->name);
+		while (types->enumerate(types, &name))
+		{
+			type = atoi(name);
+			if (!type)
+			{
+				type = enum_from_name(payload_type_short_names, name);
+				if (type == -1)
+				{
+					DBG1(DBG_CFG, "invalid payload name '%s'", name);
+					break;
+				}
+			}
+			nr = conftest->test->get_str(conftest->test,
+								"hooks.%s.%s.bits", "", this->name, name);
+			bits = enumerator_create_token(nr, ",", " ");
+			while (bits->enumerate(bits, &nr))
+			{
+				if (type == HEADER)
+				{
+					message->set_reserved_header_bit(message, atoi(nr));
+					DBG1(DBG_CFG, "setting reserved bit %s of %N",
+						  nr, payload_type_short_names, type);
+					continue;
+				}
+				payloads = message->create_payload_enumerator(message);
+				while (payloads->enumerate(payloads, &payload))
+				{
+					if (payload->get_type(payload) == type)
+					{
+						bit = payload_get_field(payload, RESERVED_BIT, atoi(nr));
+						if (bit)
+						{
+							DBG1(DBG_CFG, "setting reserved bit %s of %N",
+								  nr, payload_type_short_names, type);
+							*bit = TRUE;
+						}
+					}
+				}
+				payloads->destroy(payloads);
+			}
+			bits->destroy(bits);
+
+			nr = conftest->test->get_str(conftest->test,
+								"hooks.%s.%s.bytes", "", this->name, name);
+			byteval = conftest->test->get_int(conftest->test,
+								"hooks.%s.%s.byteval", 255, this->name, name);
+			bytes = enumerator_create_token(nr, ",", " ");
+			while (bytes->enumerate(bytes, &nr))
+			{
+				payloads = message->create_payload_enumerator(message);
+				while (payloads->enumerate(payloads, &payload))
+				{
+					if (payload->get_type(payload) == type)
+					{
+						byte = payload_get_field(payload, RESERVED_BYTE, atoi(nr));
+						if (byte)
+						{
+							DBG1(DBG_CFG, "setting reserved byte %s of %N to %d",
+								  nr, payload_type_short_names, type, byteval);
+							*byte = byteval;
+						}
+					}
+				}
+				payloads->destroy(payloads);
+			}
+			bytes->destroy(bytes);
+		}
+		types->destroy(types);
+	}
+	return TRUE;
+}
+
+METHOD(hook_t, destroy, void,
+	private_set_reserved_t *this)
+{
+	free(this->name);
+	free(this);
+}
+
+/**
+ * Create the IKE_AUTH fill hook
+ */
+hook_t *set_reserved_hook_create(char *name)
+{
+	private_set_reserved_t *this;
+
+	INIT(this,
+		.hook = {
+			.listener = {
+				.message = _message,
+			},
+			.destroy = _destroy,
+		},
+		.req = conftest->test->get_bool(conftest->test,
+										"hooks.%s.request", TRUE, name),
+		.id = conftest->test->get_int(conftest->test,
+										"hooks.%s.id", 0, name),
+		.name = strdup(name),
+	);
+
+	return &this->hook;
+}