2 * Helpers for ASN.1/BER dissection
3 * Ronnie Sahlberg (C) 2004
5 * $Id: packet-ber.h,v 1.5 2004/03/26 00:21:53 guy 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 #ifndef __PACKET_BER_H__
27 #define __PACKET_BER_H__
29 typedef int (*ber_callback)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset);
31 #define BER_CLASS_UNI 0
32 #define BER_CLASS_APP 1
33 #define BER_CLASS_CON 2
34 #define BER_CLASS_PRI 3
37 #define BER_UNI_TAG_EOC 0 /* 'end-of-content' */
38 #define BER_UNI_TAG_BOOLEAN 1
39 #define BER_UNI_TAG_INTEGER 2
40 #define BER_UNI_TAG_BITSTRING 3
41 #define BER_UNI_TAG_OCTETSTRING 4
42 #define BER_UNI_TAG_NULL 5
43 #define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */
44 #define BER_UNI_TAG_ObjectDescriptor 7
45 #define BER_UNI_TAG_REAL 9
46 #define BER_UNI_TAG_ENUMERATED 10
47 #define BER_UNI_TAG_EMBEDDED_PDV 11
48 #define BER_UNI_TAG_UTF8String 12
49 #define BER_UNI_TAG_RELATIVE_OID 13
50 #define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */
51 #define BER_UNI_TAG_SET 17 /* SET, SET OF */
52 #define BER_UNI_TAG_NumericString 18
53 #define BER_UNI_TAG_PrintableString 19
54 #define BER_UNI_TAG_TeletextString 20 /* TeletextString, T61String */
55 #define BER_UNI_TAG_VideotexString 21
56 #define BER_UNI_TAG_IA5String 22
57 #define BER_UNI_TAG_UCTTime 23
58 #define BER_UNI_TAG_GeneralizedTime 24
59 #define BER_UNI_TAG_GraphicString 25
60 #define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */
61 #define BER_UNI_TAG_GeneralString 27
62 #define BER_UNI_TAG_UniversalString 28
63 #define BER_UNI_TAG_CHARACTERSTRING 29
64 #define BER_UNI_TAG_BMPString 30
66 /* this function dissects the identifier octer of the BER TLV.
67 * We only handle TAGs (and LENGTHs) that fit inside 32 bit integers.
69 extern int get_ber_identifier(tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
70 extern int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
72 /* this function dissects the identifier octer of the BER TLV.
73 * We only handle (TAGs and) LENGTHs that fit inside 32 bit integers.
75 extern int get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
76 extern int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
78 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);
79 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);
81 extern int dissect_ber_integer(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value);
84 extern int dissect_ber_boolean(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
87 #define BER_FLAGS_OPTIONAL 0x00000001
88 #define BER_FLAGS_IMPLTAG 0x00000002
89 #define BER_FLAGS_NOOWNTAG 0x00000004
90 #define BER_FLAGS_NOTCHKTAG 0x00000008
91 typedef struct _ber_sequence {
98 /* this function dissects a BER sequence
100 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);
103 typedef struct _ber_choice {
112 /* this function dissects a BER choice
114 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);
117 /* this function dissects a BER strings
119 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);
120 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);
123 /* this function dissects a BER Object Identifier
125 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);
127 /* this function dissects a BER sequence of
129 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);
131 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);
134 extern int dissect_ber_generalized_time(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
136 typedef struct _asn_namedbit {
139 gint32 gb0; /* the 1st bit of "bit group", -1 = the 1st bit of current byte */
140 gint32 gb1; /* last bit of "bit group", -1 = last bit of current byte */
141 gchar *tstr; /* true string */
142 gchar *fstr; /* false string */
144 /* this function dissects a BER BIT-STRING
146 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);
147 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);
150 extern proto_item *ber_last_created_item;
151 extern proto_item *get_ber_last_created_item(void);
153 #endif /* __PACKET_BER_H__ */