2 * Definitions for routines common to multiple modules in the display
3 * filter code, but not used outside that code.
5 * $Id: dfilter-int.h,v 1.12 2000/07/22 15:58:53 gram Exp $
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@zing.org>
9 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 #ifndef __DFILTER_INT_H__
28 #define __DFILTER_INT_H__
34 /* in dfilter-scanner.l */
35 GByteArray *byte_str_to_guint8_array(const char *s);
36 void dfilter_scanner_text(char*);
37 void dfilter_scanner_cleanup(void);
39 /* in dfilter-grammar.y */
40 extern dfilter *global_df;
42 /* Here we provide interfaces to make our scanner act and look like lex */
43 int dfilter_lex(void);
44 void dfilter_error(char *s);
46 /* Report an error during compilation of a filter; this is called by code
47 * other than parser code, so all it does is record that an error occurred,
48 * so that even if the filter is nominally syntactically valid, we still
52 void dfilter_fail(char *fmt, ...)
53 __attribute__((format (printf, 1, 2)));
55 void dfilter_fail(char *fmt, ...);
58 /* functions that dfilter-grammar.y needs during parsing*/
59 gboolean check_relation_numeric(gint operand, GArray *a, GArray *b);
60 gboolean check_relation_floating(gint operand, GArray *a, GArray *b);
61 gboolean check_relation_ether(gint operand, GArray *a, GArray *b);
62 gboolean check_relation_ipv4(gint operand, GArray *a, GArray *b);
63 gboolean check_relation_ipv6(gint operand, GArray *a, GArray *b);
64 gboolean check_relation_bytes(gint operand, GArray *a, GArray *b);
66 void fill_array_numeric_variable(field_info*, GArray*, const guint8*);
67 void fill_array_floating_variable(field_info*, GArray*, const guint8*);
68 void fill_array_ether_variable(field_info*, GArray*, const guint8*);
69 void fill_array_ipv4_variable(field_info*, GArray*, const guint8*);
70 void fill_array_ipv6_variable(field_info*, GArray*, const guint8*);
71 void fill_array_bytes_variable(field_info*, GArray*, const guint8*);
73 gboolean fill_array_numeric_value(GNode *gnode, gpointer data);
74 gboolean fill_array_floating_value(GNode *gnode, gpointer data);
75 gboolean fill_array_ether_value(GNode *gnode, gpointer data);
76 gboolean fill_array_ipv4_value(GNode *gnode, gpointer data);
77 gboolean fill_array_ipv6_value(GNode *gnode, gpointer data);
78 gboolean fill_array_bytes_value(GNode *gnode, gpointer data);
81 #define boolean truth_value
85 relation, /* eq, ne, gt, ge, lt, le */
86 logical, /* and, or, not, xor */
87 variable, /* protocol or header field id */
88 existence, /* existence of a variable (protocol or hf) */
89 alternation, /* &, | */
90 boolean, /* true, false */
91 numeric, /* uint8, uint16, or uint32 value */
92 floating, /* double */
102 typedef gboolean(*CheckRelationFunc) (gint operand, GArray *a, GArray *b);
103 typedef void(*FillArrayFunc) (field_info*, GArray*, const guint8*);
105 /* This struct is the parse tree node created by this grammary and used
106 * directly in the display filter routines to filter packets.
108 typedef struct dfilter_node {
109 enum node_type ntype; /* from dfilter-grammar.h */
110 int elem_size; /* computed at dfilter parse time rather than
111 when finding elements for each packet. Saves time
112 in get_values_from_ptree() */
113 CheckRelationFunc check_relation_func;
114 FillArrayFunc fill_array_variable_func;
115 GNodeTraverseFunc fill_array_value_func;
117 /* copied from proto.h */
119 gint relation; /* if type == relation (eq, ne, gt, ge, lt, le) */
120 gint logical; /* if type == logical (and, or, not, xor) */
121 gint variable; /* if type == variable (protocol or header field abbrev) */
122 gint alternation; /* if type == alternation (& or |) */
126 struct timeval abs_time; /* the whole struct, not a pointer */
129 ipv4_addr ipv4; /* the whole struct, not a pointer */
134 /* used for byte-ranges */
139 /* lookup an abbreviation in our token hash, returing the ID # */
140 int dfilter_lookup_token(char *abbrev);
142 #endif /* ! __DFILTER_INT_H__ */