forked from osmocom/wireshark
112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* packet-ber.h
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* Helpers for ASN.1/BER dissection
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* Ronnie Sahlberg (C) 2004
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*
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* $Id: packet-ber.h,v 1.2 2004/03/04 07:07:00 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_BER_H__
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#define __PACKET_BER_H__
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typedef int (*ber_callback)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset);
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#define BER_CLASS_UNI 0x00
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#define BER_CLASS_APP 0x01
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#define BER_CLASS_CON 0x02
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#define BER_CLASS_PRI 0x03
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#define BER_UNI_TAG_BOOLEAN 0x01
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#define BER_UNI_TAG_INTEGER 0x02
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#define BER_UNI_TAG_BITSTRING 0x03
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#define BER_UNI_TAG_OCTETSTRING 0x04
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#define BER_UNI_TAG_SEQUENCE 0x10
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#define BER_UNI_TAG_GENTIME 0x18
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#define BER_UNI_TAG_GENSTR 0x1b
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/* this function dissects the identifier octer of the BER TLV.
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* We only handle TAGs (and LENGTHs) that fit inside 32 bit integers.
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*/
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extern int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
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/* this function dissects the identifier octer of the BER TLV.
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* We only handle (TAGs and) LENGTHs that fit inside 32 bit integers.
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*/
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extern int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length);
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/* func is NULL normally but
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* if the octet string contains an ber encode struct we provide func as the
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* dissector for that struct
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*/
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extern int dissect_ber_octet_string(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func);
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extern int dissect_ber_integer(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value);
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extern int dissect_ber_boolean(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
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#define BER_FLAGS_OPTIONAL 0x00000001
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typedef struct _ber_sequence {
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guint8 class;
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guint32 tag;
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guint32 flags;
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ber_callback func;
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} ber_sequence;
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/* this function dissects a BER sequence
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*/
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extern int dissect_ber_sequence(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id);
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typedef struct _ber_choice {
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guint8 class;
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guint32 tag;
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ber_callback func;
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} ber_choice;
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/* this function dissects a BER choice
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*/
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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);
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/* this function dissects a BER GeneralString
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*/
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extern int dissect_ber_GeneralString(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *name_string, int name_len);
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/* this function dissects a BER sequence of
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*/
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extern int dissect_ber_sequence_of(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_callback func, gint hf_id, gint ett_id);
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extern int dissect_ber_generalized_time(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
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/* this function dissects a BER BIT-STRING
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*/
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extern int dissect_ber_bitstring(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gint hf_id, gint ett_id, unsigned char *bitstring, int bitstring_len, proto_item **it, proto_tree **tr);
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extern proto_item *ber_last_created_item;
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#endif /* __PACKET_BER_H__ */
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