forked from osmocom/wireshark
122 lines
4.0 KiB
C
122 lines
4.0 KiB
C
/* dfilter-int.h
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* Definitions for routines common to multiple modules in the display
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* filter code, but not used outside that code.
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*
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* $Id: dfilter-int.h,v 1.8 1999/10/11 06:39:04 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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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 __DFILTER_INT_H__
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#define __DFILTER_INT_H__
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/* in dfilter-scanner.l */
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GByteArray *byte_str_to_guint8_array(const char *s);
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void dfilter_scanner_text(char*);
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void dfilter_scanner_cleanup(void);
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/* in dfilter-grammar.y */
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extern dfilter *global_df;
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/* Here we provide interfaces to make our scanner act and look like lex */
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int dfilter_lex(void);
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void dfilter_error(char *s);
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/* Report an error during compilation of a filter; this is called by code
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* other than parser code, so all it does is record that an error occurred,
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* so that even if the filter is nominally syntactically valid, we still
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* fail.
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*/
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#if __GNUC__ == 2
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void dfilter_fail(char *fmt, ...)
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__attribute__((format (printf, 1, 2)));
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#else
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void dfilter_fail(char *fmt, ...);
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#endif
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/* functions that dfilter-grammar.y needs during parsing*/
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gboolean check_relation_numeric(gint operand, GArray *a, GArray *b);
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gboolean check_relation_ether(gint operand, GArray *a, GArray *b);
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gboolean check_relation_bytes(gint operand, GArray *a, GArray *b);
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gboolean fill_array_numeric_value(GNode *gnode, gpointer data);
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gboolean fill_array_numeric_variable(GNode *gnode, gpointer data);
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gboolean fill_array_ether_value(GNode *gnode, gpointer data);
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gboolean fill_array_ether_variable(GNode *gnode, gpointer data);
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gboolean fill_array_bytes_value(GNode *gnode, gpointer data);
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gboolean fill_array_bytes_variable(GNode *gnode, gpointer data);
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#ifdef WIN32
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#define boolean truth_value
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#endif
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enum node_type {
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relation, /* eq, ne, gt, ge, lt, le */
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logical, /* and, or, not, xor */
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variable, /* protocol or header field id */
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existence, /* existence of a variable (protocol or hf) */
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alternation, /* &, | */
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boolean, /* true, false */
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numeric, /* uint8, uint16, or uint32 value */
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abs_time,
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string,
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ether,
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bytes,
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ipv4,
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ipxnet
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};
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typedef gboolean(*CheckRelationFunc) (gint operand, GArray *a, GArray *b);
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/* This struct is the parse tree node created by this grammary and used
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* directly in the display filter routines to filter packets.
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*/
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typedef struct dfilter_node {
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enum node_type ntype; /* from dfilter-grammar.h */
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int elem_size; /* computed at dfilter parse time rather than
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when finding elements for each packet. Saves time
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in get_values_from_ptree() */
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CheckRelationFunc check_relation_func;
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GNodeTraverseFunc fill_array_func;
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/* copied from proto.h */
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union {
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gint relation; /* if type == relation (eq, ne, gt, ge, lt, le) */
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gint logical; /* if type == logical (and, or, not, xor) */
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gint variable; /* if type == variable (protocol or header field abbrev) */
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gint alternation; /* if type == alternation (& or |) */
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guint32 numeric;
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struct timeval abs_time; /* the whole struct, not a pointer */
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gchar *string;
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guint8 ether[6];
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GByteArray *bytes;
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} value;
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/* used for byte-ranges */
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gint offset;
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guint length;
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} dfilter_node;
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/* lookup an abbreviation in our token hash, returing the ID # */
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int dfilter_lookup_token(char *abbrev);
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#endif /* ! __DFILTER_INT_H__ */
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