forked from osmocom/wireshark
146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/** @file
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef DFILTER_H
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#define DFILTER_H
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#include <glib.h>
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#include "ws_symbol_export.h"
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/* Passed back to user */
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typedef struct epan_dfilter dfilter_t;
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#include <epan/proto.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct epan_dissect;
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/* Module-level initialization */
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void
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dfilter_init(void);
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/* Module-level cleanup */
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void
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dfilter_cleanup(void);
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/* Perform macro expansion. */
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WS_DLL_PUBLIC
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char *
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dfilter_expand(const char *expr, char **err_ret);
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/* Compiles a string to a dfilter_t.
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* On success, sets the dfilter* pointed to by dfp
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* to either a NULL pointer (if the filter is a null
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* filter, as generated by an all-blank string) or to
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* a pointer to the newly-allocated dfilter_t
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* structure.
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*
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* On failure, *err_msg is set to point to the error
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* message. This error message is allocated with
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* g_malloc(), and must be freed with g_free().
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* The dfilter* will be set to NULL after a failure.
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*
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* Returns TRUE on success, FALSE on failure.
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*/
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typedef struct _dfilter_loc {
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long col_start;
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size_t col_len;
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} dfilter_loc_t;
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WS_DLL_PUBLIC
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gboolean
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dfilter_compile_real(const gchar *text, dfilter_t **dfp,
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gchar **err_msg, dfilter_loc_t *loc_ptr,
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const char *caller, gboolean save_tree,
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gboolean apply_macros);
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#define dfilter_compile(text, dfp, err_msg) \
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dfilter_compile_real(text, dfp, err_msg, NULL, __func__, FALSE, TRUE)
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#define dfilter_compile2(text, dfp, err_msg, loc_ptr) \
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dfilter_compile_real(text, dfp, err_msg, loc_ptr, __func__, FALSE, TRUE)
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/* Frees all memory used by dfilter, and frees
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* the dfilter itself. */
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WS_DLL_PUBLIC
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void
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dfilter_free(dfilter_t *df);
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/* Apply compiled dfilter */
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WS_DLL_PUBLIC
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gboolean
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dfilter_apply_edt(dfilter_t *df, struct epan_dissect *edt);
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/* Apply compiled dfilter */
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gboolean
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dfilter_apply(dfilter_t *df, proto_tree *tree);
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/* Prime a proto_tree using the fields/protocols used in a dfilter. */
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void
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dfilter_prime_proto_tree(const dfilter_t *df, proto_tree *tree);
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/* Refresh references in a compiled display filter. */
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WS_DLL_PUBLIC
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void
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dfilter_load_field_references(const dfilter_t *df, proto_tree *tree);
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/* Check if dfilter has interesting fields */
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gboolean
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dfilter_has_interesting_fields(const dfilter_t *df);
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WS_DLL_PUBLIC
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GPtrArray *
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dfilter_deprecated_tokens(dfilter_t *df);
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/* Print bytecode of dfilter to stdout */
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WS_DLL_PUBLIC
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void
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dfilter_dump(dfilter_t *df);
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/* Text after macro expansion. */
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WS_DLL_PUBLIC
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const char *
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dfilter_text(dfilter_t *df);
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/* Text representation of syntax tree (if it was saved, NULL oterwise). */
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WS_DLL_PUBLIC
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const char *
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dfilter_syntax_tree(dfilter_t *df);
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/* Print bytecode of dfilter to log */
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WS_DLL_PUBLIC
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void
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dfilter_log_full(const char *domain, enum ws_log_level level,
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const char *file, long line, const char *func,
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dfilter_t *dfcode, const char *msg);
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#ifndef WS_DISABLE_DEBUG
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#define dfilter_log(dfcode, msg) \
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dfilter_log_full(LOG_DOMAIN_DFILTER, LOG_LEVEL_NOISY, \
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__FILE__, __LINE__, __func__, \
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dfcode, msg)
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#else
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#define dfilter_log(dfcode, msg) (void)0
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#endif
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#define DFILTER_DEBUG_HERE(dfcode) \
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dfilter_log_full(LOG_DOMAIN_DFILTER, LOG_LEVEL_ECHO, \
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__FILE__, __LINE__, __func__, \
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dfcode, #dfcode);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* DFILTER_H */
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