2006-05-10 13:21:01 +00:00
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+/*
+ * IPCOMP zlib interface code.
+ * Copyright (C) 2000  Svenning Soerensen <[email protected]>
+ * Copyright (C) 2000, 2001  Richard Guy Briggs <[email protected]>
+ * 
+ * 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.
+
+ RCSID $Id: ipcomp.h,v 1.1 2004/03/15 20:35:25 as Exp $
+
+ */
+
+/* SSS */
+
+#ifndef _IPCOMP_H
+#define _IPCOMP_H
+
+/* Prefix all global deflate symbols with "ipcomp_" to avoid collisions with ppp_deflate & ext2comp */
+#ifndef IPCOMP_PREFIX
+#define IPCOMP_PREFIX
+#endif /* IPCOMP_PREFIX */
+
+#ifndef IPPROTO_COMP
+#define IPPROTO_COMP 108
+#endif /* IPPROTO_COMP */
+
+#ifdef CONFIG_IPSEC_DEBUG
+extern int sysctl_ipsec_debug_ipcomp;
+#endif /* CONFIG_IPSEC_DEBUG */
+
+struct ipcomphdr {			/* IPCOMP header */
+    __u8    ipcomp_nh;		/* Next header (protocol) */
+    __u8    ipcomp_flags;	/* Reserved, must be 0 */
+    __u16   ipcomp_cpi;		/* Compression Parameter Index */
+};
+
+extern struct inet_protocol comp_protocol;
+extern int sysctl_ipsec_debug_ipcomp;
+
+#define IPCOMP_UNCOMPRESSABLE     0x000000001
+#define IPCOMP_COMPRESSIONERROR   0x000000002
+#define IPCOMP_PARMERROR          0x000000004
+#define IPCOMP_DECOMPRESSIONERROR 0x000000008
+
+#define IPCOMP_ADAPT_INITIAL_TRIES	8
+#define IPCOMP_ADAPT_INITIAL_SKIP	4
+#define IPCOMP_ADAPT_SUBSEQ_TRIES	2
+#define IPCOMP_ADAPT_SUBSEQ_SKIP	8
+
+/* Function prototypes */
+struct sk_buff *skb_compress(struct sk_buff *skb, struct ipsec_sa *ips, unsigned int *flags);
+struct sk_buff *skb_decompress(struct sk_buff *skb, struct ipsec_sa *ips, unsigned int *flags);
+
+#endif /* _IPCOMP_H */