forked from osmocom/wireshark
1c81a6168b
"dissector_handle_get_protocol_index()". svn path=/trunk/; revision=6633
302 lines
11 KiB
C
302 lines
11 KiB
C
/* packet.h
|
|
* Definitions for packet disassembly structures and routines
|
|
*
|
|
* $Id: packet.h,v 1.65 2002/11/15 03:10:36 guy Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef __PACKET_H__
|
|
#define __PACKET_H__
|
|
|
|
#include "wiretap/wtap.h"
|
|
#include "proto.h"
|
|
#include "tvbuff.h"
|
|
#include "pint.h"
|
|
#include "to_str.h"
|
|
#include "value_string.h"
|
|
#include "column_info.h"
|
|
#include "frame_data.h"
|
|
#include "packet_info.h"
|
|
#include "column-utils.h"
|
|
#include "epan.h"
|
|
|
|
#define hi_nibble(b) (((b) & 0xf0) >> 4)
|
|
#define lo_nibble(b) ((b) & 0x0f)
|
|
|
|
/* Useful when you have an array whose size you can tell at compile-time */
|
|
#define array_length(x) (sizeof x / sizeof x[0])
|
|
|
|
/* Check whether the "len" bytes of data starting at "offset" is
|
|
* entirely inside the captured data for this packet. */
|
|
#define BYTES_ARE_IN_FRAME(offset, captured_len, len) \
|
|
((guint)(offset) + (guint)(len) > (guint)(offset) && \
|
|
(guint)(offset) + (guint)(len) <= (guint)(captured_len))
|
|
|
|
/* To pass one of two strings, singular or plural */
|
|
#define plurality(d,s,p) ((d) == 1 ? (s) : (p))
|
|
|
|
typedef struct _packet_counts {
|
|
gint sctp;
|
|
gint tcp;
|
|
gint udp;
|
|
gint icmp;
|
|
gint ospf;
|
|
gint gre;
|
|
gint netbios;
|
|
gint ipx;
|
|
gint vines;
|
|
gint other;
|
|
gint total;
|
|
gint arp;
|
|
} packet_counts;
|
|
|
|
/* Types of character encodings */
|
|
typedef enum {
|
|
CHAR_ASCII = 0, /* ASCII */
|
|
CHAR_EBCDIC = 1 /* EBCDIC */
|
|
} char_enc;
|
|
|
|
/* Struct for boolean enumerations */
|
|
typedef struct true_false_string {
|
|
char *true_string;
|
|
char *false_string;
|
|
} true_false_string;
|
|
|
|
extern const true_false_string flags_set_truth;
|
|
|
|
extern void packet_init(void);
|
|
extern void packet_cleanup(void);
|
|
|
|
/* Handle for dissectors you call directly or register with "dissector_add()".
|
|
This handle is opaque outside of "packet.c". */
|
|
struct dissector_handle;
|
|
typedef struct dissector_handle *dissector_handle_t;
|
|
|
|
/* Hash table for matching port numbers and dissectors; this is opaque
|
|
outside of "packet.c". */
|
|
struct dissector_table;
|
|
typedef struct dissector_table *dissector_table_t;
|
|
|
|
/*
|
|
* Dissector that returns nothing.
|
|
*/
|
|
typedef void (*dissector_t)(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
/*
|
|
* Dissector that returns:
|
|
*
|
|
* the amount of data in the protocol's PDU, if it was able to
|
|
* dissect all the data;
|
|
*
|
|
* 0, if the tvbuff doesn't contain a PDU for that protocol;
|
|
*
|
|
* the negative of the amount of additional data needed, if
|
|
* we need more data (e.g., from subsequent TCP segments) to
|
|
* dissect the entire PDU.
|
|
*/
|
|
typedef int (*new_dissector_t)(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
typedef void (*DATFunc) (gchar *table_name, gpointer key, gpointer value, gpointer user_data);
|
|
typedef void (*DATFunc_handle) (gchar *table_name, gpointer value, gpointer user_data);
|
|
|
|
/* Opaque structure - provides type checking but no access to components */
|
|
typedef struct dtbl_entry dtbl_entry_t;
|
|
|
|
extern dissector_handle_t dtbl_entry_get_handle (dtbl_entry_t *dtbl_entry);
|
|
extern dissector_handle_t dtbl_entry_get_initial_handle (dtbl_entry_t * entry);
|
|
extern void dissector_table_foreach_changed (char *name, DATFunc func,
|
|
gpointer user_data);
|
|
extern void dissector_table_foreach (char *name, DATFunc func,
|
|
gpointer user_data);
|
|
extern void dissector_all_tables_foreach_changed (DATFunc func,
|
|
gpointer user_data);
|
|
extern void dissector_table_foreach_handle(char *name, DATFunc_handle func,
|
|
gpointer user_data);
|
|
|
|
/* a protocol uses the function to register a sub-dissector table */
|
|
extern dissector_table_t register_dissector_table(const char *name,
|
|
char *ui_name, ftenum_t type, int base);
|
|
|
|
/* Find a dissector table by table name. */
|
|
dissector_table_t find_dissector_table(const char *name);
|
|
|
|
/* Get the UI name for a sub-dissector table, given its internal name */
|
|
extern char *get_dissector_table_ui_name(const char *name);
|
|
|
|
/* Get the field type to use when displaying values of the selector for a
|
|
sub-dissector table, given the table's internal name */
|
|
ftenum_t get_dissector_table_type(const char *name);
|
|
|
|
/* Get the base to use when displaying values of the selector for a
|
|
sub-dissector table, given the table's internal name */
|
|
extern int get_dissector_table_base(const char *name);
|
|
|
|
/* Add a sub-dissector to a dissector table. Called by the protocol routine */
|
|
/* that wants to register a sub-dissector. */
|
|
extern void dissector_add(const char *abbrev, guint32 pattern,
|
|
dissector_handle_t handle);
|
|
|
|
/* Add a sub-dissector to a dissector table. Called by the protocol routine */
|
|
/* that wants to de-register a sub-dissector. */
|
|
extern void dissector_delete(const char *name, guint32 pattern,
|
|
dissector_handle_t handle);
|
|
|
|
extern void dissector_change(const char *abbrev, guint32 pattern,
|
|
dissector_handle_t handle);
|
|
|
|
/* Reset a dissector in a sub-dissector table to its initial value. */
|
|
extern void dissector_reset(const char *name, guint32 pattern);
|
|
|
|
/* Look for a given port in a given dissector table and, if found, call
|
|
the dissector with the arguments supplied, and return TRUE, otherwise
|
|
return FALSE. */
|
|
extern gboolean dissector_try_port(dissector_table_t sub_dissectors,
|
|
guint32 port, tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
|
|
|
|
/* Look for a given port in a given dissector table and, if found, return
|
|
the dissector handle for that port. */
|
|
extern dissector_handle_t dissector_get_port_handle(
|
|
dissector_table_t sub_dissectors, guint32 port);
|
|
|
|
/* Add a handle to the list of handles that *could* be used with this
|
|
table. That list is used by code in the UI. */
|
|
extern void dissector_add_handle(const char *name, dissector_handle_t handle);
|
|
|
|
/* List of "heuristic" dissectors (which get handed a packet, look at it,
|
|
and either recognize it as being for their protocol, dissect it, and
|
|
return TRUE, or don't recognize it and return FALSE) to be called
|
|
by another dissector. */
|
|
typedef GSList *heur_dissector_list_t;
|
|
|
|
/* Type of a heuristic dissector */
|
|
typedef gboolean (*heur_dissector_t)(tvbuff_t *, packet_info *,
|
|
proto_tree *);
|
|
|
|
/* A protocol uses this function to register a heuristic dissector list */
|
|
extern void register_heur_dissector_list(const char *name,
|
|
heur_dissector_list_t *list);
|
|
|
|
/* Add a sub-dissector to a heuristic dissector list. Called by the
|
|
protocol routine that wants to register a sub-dissector. */
|
|
extern void heur_dissector_add(const char *name, heur_dissector_t dissector,
|
|
int proto);
|
|
|
|
/* Try all the dissectors in a given heuristic dissector list until
|
|
we find one that recognizes the protocol, in which case we return
|
|
TRUE, or we run out of dissectors, in which case we return FALSE. */
|
|
extern gboolean dissector_try_heuristic(heur_dissector_list_t sub_dissectors,
|
|
tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
|
|
|
|
/* Register a dissector. */
|
|
extern void register_dissector(const char *name, dissector_t dissector,
|
|
int proto);
|
|
extern void new_register_dissector(const char *name, new_dissector_t dissector,
|
|
int proto);
|
|
|
|
/* Get the short name of the protocol for a dissector handle. */
|
|
extern char *dissector_handle_get_short_name(dissector_handle_t handle);
|
|
|
|
/* Get the index of the protocol for a dissector handle. */
|
|
extern int dissector_handle_get_protocol_index(dissector_handle_t handle);
|
|
|
|
/* Find a dissector by name. */
|
|
extern dissector_handle_t find_dissector(const char *name);
|
|
|
|
/* Create an anonymous handle for a dissector. */
|
|
extern dissector_handle_t create_dissector_handle(dissector_t dissector,
|
|
int proto);
|
|
extern dissector_handle_t new_create_dissector_handle(new_dissector_t dissector,
|
|
int proto);
|
|
|
|
/* Call a dissector through a handle. */
|
|
extern int call_dissector(dissector_handle_t handle, tvbuff_t *tvb,
|
|
packet_info *pinfo, proto_tree *tree);
|
|
|
|
/* Do all one-time initialization. */
|
|
extern void dissect_init(void);
|
|
|
|
extern void dissect_cleanup(void);
|
|
|
|
/*
|
|
* Given a tvbuff, and a length from a packet header, adjust the length
|
|
* of the tvbuff to reflect the specified length.
|
|
*/
|
|
extern void set_actual_length(tvbuff_t *tvb, guint specified_len);
|
|
|
|
/* Allow protocols to register "init" routines, which are called before
|
|
we make a pass through a capture file and dissect all its packets
|
|
(e.g., when we read in a new capture file, or run a "filter packets"
|
|
or "colorize packets" pass over the current capture file). */
|
|
extern void register_init_routine(void (*func)(void));
|
|
|
|
/* Initialize all data structures used for dissection. */
|
|
extern void init_dissection(void);
|
|
|
|
/* Allow protocols to register a "cleanup" routine to be
|
|
* run after the initial sequential run through the packets.
|
|
* Note that the file can still be open after this; this is not
|
|
* the final cleanup. */
|
|
extern void register_postseq_cleanup_routine(void (*func)(void));
|
|
|
|
/* Call all the registered "postseq_cleanup" routines. */
|
|
extern void postseq_cleanup_all_protocols(void);
|
|
|
|
/* Allow dissectors to register a "final_registration" routine
|
|
* that is run like the proto_register_XXX() routine, but the end
|
|
* end of the epan_init() function; that is, *after* all other
|
|
* subsystems, liked dfilters, have finished initializing. This is
|
|
* useful for dissector registration routines which need to compile
|
|
* display filters. dfilters can't initialize itself until all protocols
|
|
* have registereed themselvs. */
|
|
void
|
|
register_final_registration_routine(void (*func)(void));
|
|
|
|
/* Call all the registered "final_registration" routines. */
|
|
void
|
|
final_registration_all_protocols(void);
|
|
|
|
/*
|
|
* Add a new data source to the list of data sources for a frame, given
|
|
* the tvbuff for the data source and its name.
|
|
*/
|
|
extern void add_new_data_source(packet_info *pinfo, tvbuff_t *tvb,
|
|
char *name);
|
|
|
|
/*
|
|
* Free up a frame's list of data sources.
|
|
*/
|
|
extern void free_data_sources(packet_info *pinfo);
|
|
|
|
/*
|
|
* Dissectors should never modify the packet data.
|
|
*/
|
|
extern void dissect_packet(epan_dissect_t *edt,
|
|
union wtap_pseudo_header *pseudo_header, const guchar *pd,
|
|
frame_data *fd, column_info *cinfo);
|
|
|
|
/* These functions are in packet-ethertype.c */
|
|
extern void capture_ethertype(guint16 etype, const guchar *pd, int offset,
|
|
int len, packet_counts *ld);
|
|
extern void ethertype(guint16 etype, tvbuff_t *tvb, int offset_after_ethertype,
|
|
packet_info *pinfo, proto_tree *tree, proto_tree *fh_tree,
|
|
int etype_id, int trailer_id);
|
|
|
|
#endif /* packet.h */
|