/*
 * Copyright (c) 1986 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.
 */

#ifndef lint
/*static char sccsid[] = "from: @(#)ns_stats.c	4.10 (Berkeley) 6/27/90";*/
static char rcsid[] = "$Id: ns_stats.c,v 1.1 1995/10/18 08:47:51 deraadt Exp $";
#endif /* not lint */

/**************************************************************************/
/*                simple monitoring of named behavior                     */
/*            dumps a bunch of values into a well-know file               */
/*                                                                        */
/**************************************************************************/

#ifdef STATS

#include <sys/param.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <stdio.h>
#include <syslog.h>
#include <arpa/nameser.h>
#include "ns.h"
#include "pathnames.h"

#ifdef STATSFILE
char *statsfile = STATSFILE;
#else
char *statsfile = _PATH_STATS;
#endif /* STATSFILE */

extern	time_t	boottime, resettime;
extern	int	needStatsDump;

/*
 * General statistics gathered
 */
/* The position in this table must agree with the defines in ns.h */
struct stats stats[S_NSTATS] = {
	{ 0, "input packets" },
	{ 0, "output packets" },
	{ 0, "queries" },
	{ 0, "iqueries" },
	{ 0, "duplicate queries" },
	{ 0, "responses" },
	{ 0, "duplicate responses" },
	{ 0, "OK answers" },
	{ 0, "FAIL answers" },
	{ 0, "FORMERR answers" },
	{ 0, "system queries" },
	{ 0, "prime cache calls" },
	{ 0, "check_ns calls" },
	{ 0, "bad responses dropped" },
	{ 0, "martian responses" },
};

/*
 *  Statistics for queries (by type)
 */
unsigned long typestats[T_ANY+1];
char *typenames[T_ANY+1] = {
	/* 5 types per line */
	"Unknown", "A", "NS", "invalid(MD)", "invalid(MF)",
	"CNAME", "SOA", "MB", "MG", "MR",
	"NULL", "WKS", "PTR", "HINFO", "MINFO",
	"MX", "TXT", 0, 0, 0,
	/* 20 per line */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	/* 100 */
	"UINFO", "UID", "GID", "UNSPEC", 0, 0, 0, 0, 0, 0,
	/* 110 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	/* 120 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	/* 200 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	/* 240 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	/* 250 */
	0, 0, "AXFR", "MAILB", "MAILA", "ANY" 
};

ns_stats()
{
	time_t timenow;
	register FILE *f;
	register int i;

	if ((f = fopen(statsfile,"a")) == 0)
	{
#ifdef DEBUG
		if (debug)
			fprintf(ddt,"can't open stat file, \"%s\"\n",statsfile);
#endif
		syslog(LOG_ERR, "cannot open stat file, \"%s\"\n",statsfile);
		return;
	}

	time(&timenow);
	fprintf(f, "###  %s", ctime(&timenow));
	fprintf(f, "%d\ttime since boot (secs)\n", timenow - boottime);
	fprintf(f, "%d\ttime since reset (secs)\n", timenow - resettime);

	/* general statistics */
	for (i = 0; i < S_NSTATS; i++)
		fprintf(f,"%lu\t%s\n", stats[i].cnt, stats[i].description);

	/* query type statistics */
	fprintf(f, "%d\tUnknown query types\n", typestats[0]);
	for(i=1; i < T_ANY+1; i++)
		if (typestats[i])
			if (typenames[i])
				fprintf(f, "%lu\t%s queries\n", typestats[i],
					typenames[i]);
			else
				fprintf(f, "%lu\ttype %d queries\n",
					typestats[i], i);
	(void) fclose(f);
}
#endif STATS