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[unix-history] / usr / src / sbin / XNSrouted / trace.h

/*
 * Copyright (c) 1983 The Regents of the University of California.
 * All rights reserved.
 *
 * This file includes significant work done at Cornell University by
 * Bill Nesheim.  That work included by permission.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)trace.h	5.6 (Berkeley) %G%
 */

/*
 * Xerox Routing Information Protocol.
 */

/*
 * 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  */
};

/*
 * 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 */

#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[sizeof(struct idp)], size, \
				ntohl(ifp->int_metric)); \
	  } \
	  if (tracepackets && ftrace) \
		dumppacket(ftrace, "from", src, &packet[sizeof(struct idp)], size); \
	}
#define	TRACE_OUTPUT(ifp, dst, size) { \
	  if (tracing) { \
		ifp = if_iflookup(dst); \
		if (ifp) \
		    trace(&ifp->int_output, dst, &packet[sizeof(struct idp)], size, ifp->int_metric); \
	  } \
	  if (tracepackets && ftrace) \
		dumppacket(ftrace, "to", dst, &packet[sizeof(struct idp)], size); \
	}