patch-2.1.30 linux/include/linux/ipsec.h

• Lines: 70
• Date: Wed Mar 26 11:01:08 1997
• Orig file: v2.1.29/linux/include/linux/ipsec.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.29/linux/include/linux/ipsec.h linux/include/linux/ipsec.h
@@ -0,0 +1,69 @@
+/*
+ *	Definitions for the SECurity layer
+ *
+ *	Author:
+ *		Robert Muchsel <muchsel@acm.org>
+ *
+ *	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.
+ */
+ 
+#ifndef _LINUX_IPSEC_H
+#define _LINUX_IPSEC_H
+
+#include <linux/config.h>
+#include <linux/socket.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+
+/* Values for the set/getsockopt calls */
+
+/* These defines are compatible with NRL IPv6, however their semantics
+   is different */
+
+#define IPSEC_LEVEL_NONE	-1	/* send plaintext, accept any */
+#define IPSEC_LEVEL_DEFAULT	0	/* encrypt/authenticate if possible */
+					/* the default MUST be 0, because a */
+					/* socket is initialized with 0's */
+#define IPSEC_LEVEL_USE		1	/* use outbound, don't require inbound */
+#define IPSEC_LEVEL_REQUIRE	2	/* require both directions */
+#define IPSEC_LEVEL_UNIQUE	2	/* for compatibility only */
+
+#ifdef __KERNEL__
+
+/* skb bit flags set on packet input processing */
+
+#define RCV_SEC			0x0f	/* options on receive */
+#define RCV_AUTH		0x01	/* was authenticated */
+#define RCV_CRYPT		0x02	/* was encrypted */
+#define RCV_TUNNEL		0x04	/* was tunneled */
+#define SND_SEC			0xf0	/* options on send, these are */
+#define SND_AUTH		0x10	/* currently unused */
+#define SND_CRYPT		0x20
+#define SND_TUNNEL		0x40
+
+/*
+ *	FIXME: ignores network encryption for now..
+ */
+ 
+#ifdef CONFIG_NET_SECURITY
+extern __inline__ int ipsec_sk_policy(struct sock *sk, struct sk_buff *skb)
+{
+	return ((sk->authentication < IPSEC_LEVEL_REQUIRE) ||
+		(skb->security & RCV_AUTH)) &&
+		((sk->encryption < IPSEC_LEVEL_REQUIRE) ||
+		(skb->security & RCV_CRYPT));
+}
+
+#else
+
+extern __inline__ int ipsec_sk_policy(struct sock *sk, struct sk_buff *skb)
+{
+	return 1;
+}
+#endif /* CONFIG */
+
+#endif	/* __KERNEL__ */
+#endif	/* _LINUX_IPSEC_H */