Bring in KAME IPv6 tcpdump. replaces esp/ah/isakmp decoder.

Hope I did not break anything.  Portability on IPv4-only node needs checking,
I'll do this very soon.  (sorry for rather jumbo commit)

XXx what is _FAVOR_BSD?

1 files changed, 82 insertions, 0 deletions

diff --git a/l2tp.h b/l2tp.h
new file mode 100644
index 00000000..008491e7
--- /dev/null
+++ b/l2tp.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * L2TP support contributed by Motonori Shindo (mshindo@ascend.co.jp)
+ */
+
+
+#define L2TP_FLAG_TYPE		0x8000	/* Type (0=Data, 1=Control) */
+#define L2TP_FLAG_LENGTH	0x4000	/* Length */
+#define L2TP_FLAG_SEQUENCE	0x0800	/* Sequence */
+#define L2TP_FLAG_OFFSET	0x0200	/* Offset */
+#define L2TP_FLAG_PRIORITY	0x0100	/* Priority */
+
+#define L2TP_VERSION_MASK	0x000f	/* Version Mask */
+#define L2TP_VERSION_L2F	0x0001	/* L2F */
+#define L2TP_VERSION_L2TP	0x0002	/* L2TP */
+
+#define L2TP_AVP_HDR_FLAG_MANDATORY	0x8000	/* Mandatory Flag */
+#define L2TP_AVP_HDR_FLAG_HIDDEN	0x4000	/* Hidden Flag */
+#define L2TP_AVP_HDR_LEN_MASK		0x03ff	/* Length Mask */
+
+#define L2TP_FRAMING_CAP_SYNC_MASK	0x00000001	/* Synchronous */
+#define L2TP_FRAMING_CAP_ASYNC_MASK	0x00000002	/* Asynchronous */
+
+#define L2TP_FRAMING_TYPE_SYNC_MASK	0x00000001	/* Synchronous */
+#define L2TP_FRAMING_TYPE_ASYNC_MASK	0x00000002	/* Asynchronous */
+
+#define L2TP_BEARER_CAP_DIGITAL_MASK	0x00000001	/* Digital */
+#define L2TP_BEARER_CAP_ANALOG_MASK	0x00000002	/* Analog */
+
+#define L2TP_BEARER_TYPE_DIGITAL_MASK	0x00000001	/* Digital */
+#define L2TP_BEARER_TYPE_ANALOG_MASK	0x00000002	/* Analog */
+
+/* Authen Type */
+#define L2TP_AUTHEN_TYPE_RESERVED	0x0000	/* Reserved */
+#define L2TP_AUTHEN_TYPE_TEXTUAL	0x0001	/* Textual username/password exchange */
+#define L2TP_AUTHEN_TYPE_CHAP		0x0002	/* PPP CHAP */
+#define L2TP_AUTHEN_TYPE_PAP		0x0003	/* PPP PAP */
+#define L2TP_AUTHEN_TYPE_NO_AUTH	0x0004	/* No Authentication */
+#define L2TP_AUTHEN_TYPE_MSCHAP		0x0005	/* MSCHAPv1 */
+
+#define L2TP_PROXY_AUTH_ID_MASK		0x00ff
+
+
+struct l2tp_avp_vec {
+	const char *name;
+	void (*print)(const u_char *, u_int);	
+};
+		
+struct l2tp_call_errors {
+	u_short	reserved;
+	u_int	crc_errs;
+	u_int	framing_errs;	
+	u_int	hardware_overruns;	
+	u_int	buffer_overruns;
+	u_int	timeout_errs;	
+	u_int	alignment_errs;	
+};
+
+struct l2tp_accm {
+	u_short reserved;
+	u_int	send_accm;
+	u_int	recv_accm;
+};
+