- defined data struct and encoding rules for the ikev2-header

2005-11-08 15:53:04 +00:00
parent bb53258a0e
commit cdd0dcdc33
2 changed files with 161 additions and 0 deletions
@@ -0,0 +1,63 @@
+/**
+ * @file ike_header.c
+ * 
+ * @brief Definition of the encoding rules used when parsing or generating
+ * an IKEv2-Header
+ *  
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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.
+ */
+
+/* offsetof macro */
+#include <stddef.h>
+
+ #include "../encodings.h"
+ #include "ike_header.h"
+
+/**
+ * Encoding rules to parse or generate a IKEv2-Header
+ * 
+ * The defined offsets are the positions in a struct of type 
+ * ike_header_t.
+ * 
+ */
+encoding_rule_t ike_header_encodings[] = {
+ 	/* 8 Byte SPI, stored in the field initiator_spi */
+	{ U_INT_64,		offsetof(ike_header_t, initiator_spi)	},
+ 	/* 8 Byte SPI, stored in the field responder_spi */
+	{ U_INT_64,		offsetof(ike_header_t, responder_spi) 	},
+ 	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,		offsetof(ike_header_t, next_payload) 	},
+ 	/* 4 Bit major version, stored in the field maj_version */
+	{ U_INT_4,		offsetof(ike_header_t, maj_version) 		},
+ 	/* 4 Bit minor version, stored in the field min_version */
+	{ U_INT_4,		offsetof(ike_header_t, min_version) 		},
+ 	/* 2 Bit reserved bits, nowhere stored */
+	{ RESERVED_BIT,	0 										}, 
+	{ RESERVED_BIT,	0 										}, 
+ 	/* 3 Bit flags, stored in the fields response, version and initiator */
+	{ FLAG,			offsetof(ike_header_t, flags.response) 	},	
+	{ FLAG,			offsetof(ike_header_t, flags.version) 	},
+	{ FLAG,			offsetof(ike_header_t, flags.initiator) 	},
+ 	/* 3 Bit reserved bits, nowhere stored */
+	{ RESERVED_BIT,	0 										},
+	{ RESERVED_BIT,	0 										},
+	{ RESERVED_BIT,	0 										},
+ 	/* 4 Byte message id, stored in the field message_id */
+	{ U_INT_32,		offsetof(ike_header_t, message_id) 		},
+ 	/* 4 Byte length fied, stored in the field length */
+	{ LENGTH,		offsetof(ike_header_t, length) 			}
+};