dfilter-int.h

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#ifndef DFILTER_INT_H
#define DFILTER_INT_H
 
#include "dfilter.h"
#include "syntax-tree.h"
 
#include <epan/proto.h>
#include <stdio.h>
 
typedef struct {
    const header_field_info *hfinfo;
    fvalue_t *value;
    int proto_layer_num;
} df_reference_t;
 
typedef struct {
    GPtrArray *array;
} df_cell_t;
 
typedef struct {
    GPtrArray *ptr;
    unsigned idx;
} df_cell_iter_t;
 
/* Passed back to user */
struct epan_dfilter {
    GPtrArray   *insns;
    unsigned    num_registers;
    df_cell_t   *registers;
    int     *interesting_fields;
    int     num_interesting_fields;
    GPtrArray   *deprecated;
    GSList      *warnings;
    char        *expanded_text;
    GHashTable  *references;
    GHashTable  *raw_references;
    char        *syntax_tree_str;
    /* Used to pass arguments to functions. List of Lists (list of registers). */
    GSList      *function_stack;
    GSList      *set_stack;
};
 
typedef struct {
    df_error_t *error;
    /* more fields. */
} dfstate_t;
 
/*
 * State for first stage of compilation (parsing).
 */
typedef struct {
    df_error_t  *error;     /* Must be first struct field. */
    unsigned    flags;
    stnode_t    *st_root;
    GPtrArray   *deprecated;
    stnode_t    *lval;
    GString     *quoted_string;
    bool        raw_string;
    df_loc_t    string_loc;
    df_loc_t    location;
} dfsyntax_t;
 
/*
 * State for second stage of compilation (semantic check and code generation).
 */
typedef struct {
    df_error_t  *error;     /* Must be first struct field. */
    unsigned    flags;
    stnode_t    *st_root;
    unsigned    field_count;
    GPtrArray   *insns;
    GHashTable  *loaded_fields;
    GHashTable  *loaded_raw_fields;
    GHashTable  *interesting_fields;
    int     next_insn_id;
    int     next_register;
    GPtrArray   *deprecated;
    GHashTable  *references; /* hfinfo -> pointer to array of references */
    GHashTable  *raw_references; /* hfinfo -> pointer to array of references */
    char        *expanded_text;
    wmem_allocator_t *dfw_scope; /* Because we use exceptions for error handling sometimes
                                    cleaning up memory allocations is inconvenient. Memory
                    allocated from this pool will be freed when the dfwork_t
                    context is destroyed. */
    GSList      *warnings;
} dfwork_t;
 
/* Constructor/Destructor prototypes for Lemon Parser */
void *DfilterAlloc(void *(*)(size_t));
 
void DfilterFree(void *, void (*)(void *));
 
void Dfilter(void *, int, stnode_t *, dfsyntax_t *);
 
/* Return value for error in scanner. */
#define SCAN_FAILED -1  /* not 0, as that means end-of-input */
 
WS_DLL_PUBLIC
void
dfilter_vfail(void *state, int code, df_loc_t err_loc,
            const char *format, va_list args);
 
WS_DLL_PUBLIC
void
dfilter_fail(void *state, int code, df_loc_t err_loc,
            const char *format, ...) G_GNUC_PRINTF(4, 5);
 
WS_DLL_PUBLIC WS_NORETURN
void
dfilter_fail_throw(void *state, int code, df_loc_t err_loc,
            const char *format, ...) G_GNUC_PRINTF(4, 5);
 
void
dfw_set_error_location(dfwork_t *dfw, df_loc_t err_loc);
 
void
add_deprecated_token(GPtrArray *deprecated, const char *token);
 
void
add_compile_warning(dfwork_t *dfw, const char *format, ...);
 
void
free_deprecated(GPtrArray *deprecated);
 
void
DfilterTrace(FILE *TraceFILE, char *zTracePrompt);
 
header_field_info *
dfilter_resolve_unparsed(const char *name, GPtrArray *deprecated);
 
/* Returns true if the create syntax node has a (value) string type. */
bool
dfilter_fvalue_from_literal(dfwork_t *dfw, ftenum_t ftype, stnode_t *st,
        bool allow_partial_value, header_field_info *hfinfo_value_string);
 
/* Returns true if the create syntax node has a (value) string type. */
bool
dfilter_fvalue_from_string(dfwork_t *dfw, ftenum_t ftype, stnode_t *st,
        header_field_info *hfinfo_value_string);
 
void
dfilter_fvalue_from_charconst(dfwork_t *dfw, ftenum_t ftype, stnode_t *st);
 
void
dfilter_fvalue_from_number(dfwork_t *dfw, ftenum_t ftype, stnode_t *st);
 
const char *tokenstr(int token);
 
df_reference_t *
reference_new(const field_info *finfo, bool raw);
 
void
reference_free(df_reference_t *ref);
 
WS_DLL_PUBLIC
void
df_cell_append(df_cell_t *rp, fvalue_t *fv);
 
WS_DLL_PUBLIC
GPtrArray *
df_cell_ref(df_cell_t *rp);
 
#define df_cell_ptr(rp) ((rp)->array)
 
WS_DLL_PUBLIC
size_t
df_cell_size(const df_cell_t *rp);
 
WS_DLL_PUBLIC
fvalue_t **
df_cell_array(const df_cell_t *rp);
 
WS_DLL_PUBLIC
bool
df_cell_is_empty(const df_cell_t *rp);
 
WS_DLL_PUBLIC
bool
df_cell_is_null(const df_cell_t *rp);
 
/* Pass true to free the array contents when the cell is cleared. */
WS_DLL_PUBLIC
void
df_cell_init(df_cell_t *rp, bool free_seg);
 
WS_DLL_PUBLIC
void
df_cell_clear(df_cell_t *rp);
 
/* Cell must not be cleared while iter is alive. */
WS_DLL_PUBLIC
void
df_cell_iter_init(df_cell_t *rp, df_cell_iter_t *iter);
 
WS_DLL_PUBLIC
fvalue_t *
df_cell_iter_next(df_cell_iter_t *iter);
 
 
#endif