trace.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
#ifndef lint
static  char    *sccsid = "@(#)trace.h	4.1  (ULTRIX)        7/2/90";
#endif lint
*/
/************************************************************************
 *									*
 *			Copyright (c) 1984,1988 by			*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	trace.h	5.2 (Berkeley) 4/20/86
 */

/************************************************************************
 *			Modification History				*
 *
 * 03/09/89	R. Bhanukitsiri
 *		Add trace support for SNMP.
 *									*
 ************************************************************************/

/*
 * Routing table management daemon.
 */

/*
 * Trace record format.
 */
struct	iftrace {
	time_t	ift_stamp;		/* time stamp */
	struct	sockaddr ift_who;	/* from/to */
	char	*ift_packet;		/* pointer to packet */
	short	ift_size;		/* size of packet */
	short	ift_metric;		/* metric on associated metric */
};

/*
 * Per interface packet tracing buffers.  An incoming and
 * outgoing circular buffer of packets is maintained, per
 * interface, for debugging.  Buffers are dumped whenever
 * an interface is marked down.
 */
struct	ifdebug {
	struct	iftrace *ifd_records;	/* array of trace records */
	struct	iftrace *ifd_front;	/* next empty trace record */
	int	ifd_count;		/* number of unprinted records */
	struct	interface *ifd_if;	/* for locating stuff */
};

/*
 * Packet tracing stuff.
 */
int	tracepackets;		/* watch packets as they go by */
int	tracing;		/* on/off */
FILE	*ftrace;		/* output trace file */
extern	int snmpdebug;		/* debug SNMP stuff */

#define	TRACE_ACTION(action, route) { \
	  if (tracing) \
		traceaction(ftrace, "action", route); \
	}
#define	TRACE_INPUT(ifp, src, size) { \
	  if (tracing) { \
		ifp = if_iflookup(src); \
		if (ifp) \
			trace(&ifp->int_input, src, packet, size, \
				ntohl(ifp->int_metric)); \
	  } \
	  if (tracepackets) \
		dumppacket(stdout, "from", src, packet, size); \
	}
#define	TRACE_OUTPUT(ifp, dst, size) { \
	  if (tracing && ifp) \
		trace(&ifp->int_output, dst, packet, size, ifp->int_metric); \
	  if (tracepackets) \
		dumppacket(stdout, "to", dst, packet, size); \
	}

#define	TRACE_TRC	if (snmpdebug) printf
#define	TRACE_EXT	if (snmpdebug) printf
#define	TRACE_UPD	if (snmpdebug) printf