trace.h

dhcp-3.0.1rc13.tar.gz

/* trace.h

   Definitions for omapi tracing facility... */

/*
 * Copyright (c) 2001 Internet Software Consortium.
 * 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. Neither the name of The Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
 *
 * This software has been written for the Internet Software Consortium
 * by Ted Lemon, as part of a project for Nominum, Inc.   To learn more
 * about the Internet Software Consortium, see http://www.isc.org/.  To
 * learn more about Nominum, Inc., see ``http://www.nominum.com''.
 */

#define TRACEFILE_MAGIC		0x64484370UL	/* dHCp */
#define TRACEFILE_VERSION	1

/* The first thing in a trace file is the header, which basically just 
   defines the version of the file. */
typedef struct {
	u_int32_t magic;	/* Magic number for trace file. */
	u_int32_t version;	/* Version of file. */
	int32_t hlen;		/* Length of this header. */
	int32_t phlen;		/* Length of packet headers. */
} tracefile_header_t;

/* The trace file is composed of a bunch of trace packets.   Each such packet
   has a type, followed by a length, followed by a timestamp, followed by
   the actual contents of the packet.   The type indexes are not fixed -
   they are allocated either on readback or when writing a trace file.
   One index type is reserved - type zero means that this record is a type
   name to index mapping. */
typedef struct {
	u_int32_t type_index;	/* Index to the type of handler that this
				   packet needs. */
	u_int32_t length;	/* Length of the packet.  This includes
				   everything except the fixed header. */
	u_int32_t when;		/* When the packet was written. */
	u_int32_t pad;		/* Round this out to a quad boundary. */
} tracepacket_t;

#define TRACE_INDEX_MAPPING_SIZE 4	/* trace_index_mapping_t less name. */
typedef struct {
	u_int32_t index;
	char name [1];
} trace_index_mapping_t;

struct trace_type; /* forward */
typedef struct trace_type trace_type_t;

struct trace_type {
	trace_type_t *next;
	int index;
	char *name;
	void *baggage;
	void (*have_packet) (trace_type_t *, unsigned, char *);
	void (*stop_tracing) (trace_type_t *);
};

typedef struct trace_iov {
	const char *buf;
	unsigned len;
} trace_iov_t;

typedef struct {
	u_int16_t addrtype;
	u_int16_t addrlen;
	u_int8_t address [16];
	u_int16_t port;
} trace_addr_t;

void trace_free_all (void);
int trace_playback (void);
int trace_record (void);
isc_result_t trace_init (void (*set_time) (u_int32_t), const char *, int);
isc_result_t trace_begin (const char *, const char *, int);
isc_result_t trace_write_packet (trace_type_t *, unsigned, const char *,
				 const char *, int);
isc_result_t trace_write_packet_iov (trace_type_t *, int, trace_iov_t *,
				     const char *, int);
void trace_type_stash (trace_type_t *);
trace_type_t *trace_type_register (const char *, void *,
				   void (*) (trace_type_t *,
					     unsigned, char *),
				   void (*) (trace_type_t *),
				   const char *, int);
void trace_stop (void);
void trace_index_map_input (trace_type_t *, unsigned, char *);
void trace_index_stop_tracing (trace_type_t *);
void trace_replay_init (void);
void trace_file_replay (const char *);
isc_result_t trace_get_next_packet (trace_type_t **, tracepacket_t *,
				    char **, unsigned *, unsigned *);
isc_result_t trace_get_file (trace_type_t *,
			     const char *, unsigned *, char **);
isc_result_t trace_get_packet (trace_type_t **, unsigned *, char **);
time_t trace_snoop_time (trace_type_t **);