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Diffstat (limited to 'epan/dissectors/packet-ber.h')
| -rw-r--r-- | epan/dissectors/packet-ber.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ber.h b/epan/dissectors/packet-ber.h new file mode 100644 index 0000000000..5d00016602 --- /dev/null +++ b/epan/dissectors/packet-ber.h @@ -0,0 +1,161 @@ +/* packet-ber.h + * Helpers for ASN.1/BER dissection + * Ronnie Sahlberg (C) 2004 + * + * $Id$ + * + * 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__ + +#define BER_NOT_DECODED_YET(x) \ +proto_tree_add_text(tree, tvb, offset, 0, "something unknown here [%s]",x); \ +fprintf(stderr,"Not decoded yet in packet : %d [%s]\n", pinfo->fd->num,x); \ +if (check_col(pinfo->cinfo, COL_INFO)){ \ + col_append_fstr(pinfo->cinfo, COL_INFO, "[UNKNOWN BER: %s]", x); \ +} \ +tvb_get_guint8(tvb, 9999); + +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_ObjectDescriptor 7 +#define BER_UNI_TAG_REAL 9 +#define BER_UNI_TAG_ENUMERATED 10 +#define BER_UNI_TAG_EMBEDDED_PDV 11 +#define BER_UNI_TAG_UTF8String 12 +#define BER_UNI_TAG_RELATIVE_OID 13 +#define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */ +#define BER_UNI_TAG_SET 17 /* SET, SET OF */ +#define BER_UNI_TAG_NumericString 18 +#define BER_UNI_TAG_PrintableString 19 +#define BER_UNI_TAG_TeletextString 20 /* TeletextString, T61String */ +#define BER_UNI_TAG_VideotexString 21 +#define BER_UNI_TAG_IA5String 22 +#define BER_UNI_TAG_UTCTime 23 +#define BER_UNI_TAG_GeneralizedTime 24 +#define BER_UNI_TAG_GraphicString 25 +#define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */ +#define BER_UNI_TAG_GeneralString 27 +#define BER_UNI_TAG_UniversalString 28 +#define BER_UNI_TAG_CHARACTERSTRING 29 +#define BER_UNI_TAG_BMPString 30 + +/* 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; +extern proto_item *get_ber_last_created_item(void); + +#endif /* __PACKET_BER_H__ */ |