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which included commits to RCS files with non-trunk default branches.

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diff --git a/sys/netns/ns_error.h b/sys/netns/ns_error.h
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+++ b/sys/netns/ns_error.h
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+/*
+ * Copyright (c) 1984, 1988, 1993
+ *	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 the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ns_error.h	8.1 (Berkeley) 6/10/93
+ */
+
+/*
+ * Xerox NS error messages
+ */
+
+struct ns_errp {
+	u_short		ns_err_num;		/* Error Number */
+	u_short		ns_err_param;		/* Error Parameter */
+	struct idp	ns_err_idp;		/* Initial segment of offending
+						   packet */
+	u_char		ns_err_lev2[12];	/* at least this much higher
+						   level protocol */
+};
+struct  ns_epidp {
+	struct idp ns_ep_idp;
+	struct ns_errp ns_ep_errp;
+};
+
+#define	NS_ERR_UNSPEC	0	/* Unspecified Error detected at dest. */
+#define	NS_ERR_BADSUM	1	/* Bad Checksum detected at dest */
+#define	NS_ERR_NOSOCK	2	/* Specified socket does not exist at dest*/
+#define	NS_ERR_FULLUP	3	/* Dest. refuses packet due to resource lim.*/
+#define	NS_ERR_UNSPEC_T	0x200	/* Unspec. Error occured before reaching dest*/
+#define	NS_ERR_BADSUM_T	0x201	/* Bad Checksum detected in transit */
+#define	NS_ERR_UNREACH_HOST	0x202	/* Dest cannot be reached from here*/
+#define	NS_ERR_TOO_OLD	0x203	/* Packet x'd 15 routers without delivery*/
+#define	NS_ERR_TOO_BIG	0x204	/* Packet too large to be forwarded through
+				   some intermediate gateway.  The error
+				   parameter field contains the max packet
+				   size that can be accommodated */
+#define NS_ERR_MAX 20
+
+/*
+ * Variables related to this implementation
+ * of the network systems error message protocol.
+ */
+struct	ns_errstat {
+/* statistics related to ns_err packets generated */
+	int	ns_es_error;		/* # of calls to ns_error */
+	int	ns_es_oldshort;		/* no error 'cuz old ip too short */
+	int	ns_es_oldns_err;	/* no error 'cuz old was ns_err */
+	int	ns_es_outhist[NS_ERR_MAX];
+/* statistics related to input messages processed */
+	int	ns_es_badcode;		/* ns_err_code out of range */
+	int	ns_es_tooshort;		/* packet < IDP_MINLEN */
+	int	ns_es_checksum;		/* bad checksum */
+	int	ns_es_badlen;		/* calculated bound mismatch */
+	int	ns_es_reflect;		/* number of responses */
+	int	ns_es_inhist[NS_ERR_MAX];
+	u_short	ns_es_codes[NS_ERR_MAX];/* which error code for outhist
+					   since we might not know all */
+};
+
+#ifdef KERNEL
+struct	ns_errstat ns_errstat;
+#endif