forked from osmocom/wireshark
73f560c866
so that sometime later it will be easy to add code to add the name of the oid to the dissection. svn path=/trunk/; revision=11478
165 lines
6.9 KiB
C
165 lines
6.9 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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* $Id$
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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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#define BER_NOT_DECODED_YET(x) \
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proto_tree_add_text(tree, tvb, offset, 0, "something unknown here [%s]",x); \
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fprintf(stderr,"Not decoded yet in packet : %d [%s]\n", pinfo->fd->num,x); \
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if (check_col(pinfo->cinfo, COL_INFO)){ \
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col_append_fstr(pinfo->cinfo, COL_INFO, "[UNKNOWN BER: %s]", x); \
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} \
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tvb_get_guint8(tvb, 9999);
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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 0
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#define BER_CLASS_APP 1
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#define BER_CLASS_CON 2
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#define BER_CLASS_PRI 3
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#define BER_CLASS_ANY 99 /* dont check class nor tag */
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#define BER_UNI_TAG_EOC 0 /* 'end-of-content' */
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#define BER_UNI_TAG_BOOLEAN 1
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#define BER_UNI_TAG_INTEGER 2
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#define BER_UNI_TAG_BITSTRING 3
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#define BER_UNI_TAG_OCTETSTRING 4
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#define BER_UNI_TAG_NULL 5
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#define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */
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#define BER_UNI_TAG_ObjectDescriptor 7
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#define BER_UNI_TAG_REAL 9
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#define BER_UNI_TAG_ENUMERATED 10
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#define BER_UNI_TAG_EMBEDDED_PDV 11
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#define BER_UNI_TAG_UTF8String 12
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#define BER_UNI_TAG_RELATIVE_OID 13
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#define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */
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#define BER_UNI_TAG_SET 17 /* SET, SET OF */
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#define BER_UNI_TAG_NumericString 18
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#define BER_UNI_TAG_PrintableString 19
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#define BER_UNI_TAG_TeletextString 20 /* TeletextString, T61String */
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#define BER_UNI_TAG_VideotexString 21
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#define BER_UNI_TAG_IA5String 22
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#define BER_UNI_TAG_UTCTime 23
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#define BER_UNI_TAG_GeneralizedTime 24
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#define BER_UNI_TAG_GraphicString 25
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#define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */
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#define BER_UNI_TAG_GeneralString 27
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#define BER_UNI_TAG_UniversalString 28
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#define BER_UNI_TAG_CHARACTERSTRING 29
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#define BER_UNI_TAG_BMPString 30
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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 get_ber_identifier(tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag);
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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 get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
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extern int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
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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);
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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);
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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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#define BER_FLAGS_IMPLTAG 0x00000002
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#define BER_FLAGS_NOOWNTAG 0x00000004
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#define BER_FLAGS_NOTCHKTAG 0x00000008
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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(gboolean implicit_tag, 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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guint32 value;
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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_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 strings
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*/
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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);
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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, guint name_len);
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/* this function dissects a BER Object Identifier
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*/
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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);
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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(gboolean implicit_tag, 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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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);
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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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typedef struct _asn_namedbit {
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guint32 bit;
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int *p_id;
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gint32 gb0; /* the 1st bit of "bit group", -1 = the 1st bit of current byte */
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gint32 gb1; /* last bit of "bit group", -1 = last bit of current byte */
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gchar *tstr; /* true string */
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gchar *fstr; /* false string */
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} asn_namedbit;
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/* this function dissects a BER BIT-STRING
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*/
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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);
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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);
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extern proto_item *ber_last_created_item;
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extern proto_item *get_ber_last_created_item(void);
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int call_ber_oid_callback(char *oid, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);
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void register_ber_oid_dissector(char *oid, dissector_t dissector, int proto, char *name);
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#endif /* __PACKET_BER_H__ */
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