2 * Helpers for ASN.1/BER dissection
3 * Ronnie Sahlberg (C) 2004
5 * $Id: packet-ber.h,v 1.1 2004/02/20 10:04:10 sahlberg Exp $
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 typedef int (*ber_callback)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset);
28 #define BER_CLASS_UNI 0x00
29 #define BER_CLASS_APP 0x01
30 #define BER_CLASS_CON 0x02
31 #define BER_CLASS_PRI 0x03
34 #define BER_UNI_TAG_BOOLEAN 0x01
35 #define BER_UNI_TAG_INTEGER 0x02
36 #define BER_UNI_TAG_BITSTRING 0x03
37 #define BER_UNI_TAG_OCTETSTRING 0x04
38 #define BER_UNI_TAG_SEQUENCE 0x10
39 #define BER_UNI_TAG_GENTIME 0x18
40 #define BER_UNI_TAG_GENSTR 0x1b
42 /* this function dissects the identifier octer of the BER TLV.
43 * We only handle TAGs (and LENGTHs) that fit inside 32 bit integers.
45 int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
47 /* this function dissects the identifier octer of the BER TLV.
48 * We only handle (TAGs and) LENGTHs that fit inside 32 bit integers.
50 int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length);
52 /* func is NULL normally but
53 * if the octet string contains an ber encode struct we provide func as the
54 * dissector for that struct
56 int dissect_ber_octet_string(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func);
58 int dissect_ber_integer(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value);
61 int dissect_ber_boolean(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
64 #define BER_FLAGS_OPTIONAL 0x00000001
65 typedef struct _ber_sequence {
72 /* this function dissects a BER sequence
74 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);
77 typedef struct _ber_choice {
84 /* this function dissects a BER choice
86 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);
89 /* this function dissects a BER GeneralString
91 int dissect_ber_GeneralString(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *name_string, int name_len);
94 /* this function dissects a BER sequence of
96 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);
99 int dissect_ber_generalized_time(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
101 /* this function dissects a BER BIT-STRING
103 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);
106 extern proto_item *ber_last_created_item;