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/* packet-ber.h
* Helpers for ASN.1/BER dissection
* Ronnie Sahlberg (C) 2004
*
* $Id: packet-ber.h,v 1.3 2004/03/25 09:17:07 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_BER_H__
#define __PACKET_BER_H__
typedef int (*ber_callback)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset);
#define BER_CLASS_UNI 0
#define BER_CLASS_APP 1
#define BER_CLASS_CON 2
#define BER_CLASS_PRI 3
#define BER_UNI_TAG_EOC 0 /* 'end-of-content' */
#define BER_UNI_TAG_BOOLEAN 1
#define BER_UNI_TAG_INTEGER 2
#define BER_UNI_TAG_BITSTRING 3
#define BER_UNI_TAG_OCTETSTRING 4
#define BER_UNI_TAG_NULL 5
#define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */
#define BER_UNI_TAG_ENUMERATED 10
#define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF*/
#define BER_UNI_TAG_SET 17 /* SET, SET OF*/
#define BER_UNI_TAG_NUMSTR 18
#define BER_UNI_TAG_GENTIME 24
#define BER_UNI_TAG_GENSTR 27
/* this function dissects the identifier octer of the BER TLV.
* We only handle TAGs (and LENGTHs) that fit inside 32 bit integers.
*/
extern int get_ber_identifier(tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
extern int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
/* this function dissects the identifier octer of the BER TLV.
* We only handle (TAGs and) LENGTHs that fit inside 32 bit integers.
*/
extern int get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
extern int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
extern int dissect_ber_octet_string(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb);
extern int dissect_ber_octet_string_wcb(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func);
extern int dissect_ber_integer(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value);
extern int dissect_ber_boolean(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
#define BER_FLAGS_OPTIONAL 0x00000001
#define BER_FLAGS_IMPLTAG 0x00000002
#define BER_FLAGS_NOOWNTAG 0x00000004
#define BER_FLAGS_NOTCHKTAG 0x00000008
typedef struct _ber_sequence {
guint8 class;
guint32 tag;
guint32 flags;
ber_callback func;
} ber_sequence;
/* this function dissects a BER sequence
*/
extern int dissect_ber_sequence(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id);
typedef struct _ber_choice {
guint32 value;
guint8 class;
guint32 tag;
guint32 flags;
ber_callback func;
} ber_choice;
/* this function dissects a BER choice
*/
extern int dissect_ber_choice(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_choice *ch, gint hf_id, gint ett_id);
/* this function dissects a BER strings
*/
extern int dissect_ber_restricted_string(gboolean implicit_tag, guint32 type, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb);
extern int dissect_ber_GeneralString(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *name_string, guint name_len);
/* this function dissects a BER Object Identifier
*/
extern int dissect_ber_object_identifier(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *value_string);
/* this function dissects a BER sequence of
*/
extern int dissect_ber_sequence_of(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id);
extern int dissect_ber_set_of(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id);
extern int dissect_ber_generalized_time(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
typedef struct _asn_namedbit {
guint32 bit;
int *p_id;
gint32 gb0; /* the 1st bit of "bit group", -1 = the 1st bit of current byte */
gint32 gb1; /* last bit of "bit group", -1 = last bit of current byte */
gchar *tstr; /* true string */
gchar *fstr; /* false string */
} asn_namedbit;
/* this function dissects a BER BIT-STRING
*/
extern int dissect_ber_bitstring(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn_namedbit *named_bits, gint hf_id, gint ett_id, tvbuff_t **out_tvb);
extern int dissect_ber_bitstring32(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, int **bit_fields, gint hf_id, gint ett_id, tvbuff_t **out_tvb);
extern proto_item *ber_last_created_item;
#endif /* __PACKET_BER_H__ */
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