dfvm.h

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#ifndef DFVM_H
#define DFVM_H
 
#include <wsutil/regex.h>
#include "dfilter-int.h"
#include "syntax-tree.h"
#include "drange.h"
#include "dfunctions.h"
 
#define ASSERT_DFVM_OP_NOT_REACHED(op) \
    ws_error("Invalid dfvm opcode '%s'.", dfvm_opcode_tostr(op))
 
typedef enum {
    EMPTY,
    FVALUE,
    HFINFO,
    RAW_HFINFO,
    INSN_NUMBER,
    REGISTER,
    INTEGER,
    DRANGE,
    FUNCTION_DEF,
    PCRE,
} dfvm_value_type_t;
 
typedef struct {
    dfvm_value_type_t   type;
 
    union {
        GPtrArray       *fvalue_p; /* Always has length == 1 */
        uint32_t        numeric;
        drange_t        *drange;
        header_field_info   *hfinfo;
        df_func_def_t       *funcdef;
        ws_regex_t      *pcre;
    } value;
 
    int ref_count;
} dfvm_value_t;
 
#define dfvm_value_get_fvalue(val) ((val)->value.fvalue_p->pdata[0])
 
typedef enum {
    DFVM_NULL,  /* Null/invalid opcode */
    DFVM_IF_TRUE_GOTO,
    DFVM_IF_FALSE_GOTO,
    DFVM_CHECK_EXISTS,
    DFVM_CHECK_EXISTS_R,
    DFVM_NOT,
    DFVM_RETURN,
    DFVM_READ_TREE,
    DFVM_READ_TREE_R,
    DFVM_READ_REFERENCE,
    DFVM_READ_REFERENCE_R,
    DFVM_PUT_FVALUE,
    DFVM_ALL_EQ,
    DFVM_ANY_EQ,
    DFVM_ALL_NE,
    DFVM_ANY_NE,
    DFVM_ALL_GT,
    DFVM_ANY_GT,
    DFVM_ALL_GE,
    DFVM_ANY_GE,
    DFVM_ALL_LT,
    DFVM_ANY_LT,
    DFVM_ALL_LE,
    DFVM_ANY_LE,
    DFVM_ALL_CONTAINS,
    DFVM_ANY_CONTAINS,
    DFVM_ALL_MATCHES,
    DFVM_ANY_MATCHES,
    DFVM_SET_ALL_IN,
    DFVM_SET_ANY_IN,
    DFVM_SET_ALL_NOT_IN,
    DFVM_SET_ANY_NOT_IN,
    DFVM_SET_ADD,
    DFVM_SET_ADD_RANGE,
    DFVM_SET_CLEAR,
    DFVM_SLICE,
    DFVM_LENGTH,
    DFVM_VALUE_STRING,
    DFVM_BITWISE_AND,
    DFVM_UNARY_MINUS,
    DFVM_ADD,
    DFVM_SUBTRACT,
    DFVM_MULTIPLY,
    DFVM_DIVIDE,
    DFVM_MODULO,
    DFVM_CALL_FUNCTION,
    DFVM_STACK_PUSH,
    DFVM_STACK_POP,
    DFVM_NOT_ALL_ZERO,
    DFVM_NO_OP,
} dfvm_opcode_t;
 
const char *
dfvm_opcode_tostr(dfvm_opcode_t code);
 
typedef struct {
    int     id;
    dfvm_opcode_t   op;
    dfvm_value_t    *arg1;
    dfvm_value_t    *arg2;
    dfvm_value_t    *arg3;
} dfvm_insn_t;
 
dfvm_insn_t*
dfvm_insn_new(dfvm_opcode_t op);
 
void
dfvm_insn_replace_no_op(dfvm_insn_t *insn);
 
void
dfvm_insn_free(dfvm_insn_t *insn);
 
dfvm_value_t*
dfvm_value_new(dfvm_value_type_t type);
 
dfvm_value_t*
dfvm_value_ref(dfvm_value_t *v);
 
void
dfvm_value_unref(dfvm_value_t *v);
 
dfvm_value_t*
dfvm_value_new_fvalue(fvalue_t *fv);
 
dfvm_value_t*
dfvm_value_new_hfinfo(header_field_info *hfinfo, bool raw);
 
dfvm_value_t*
dfvm_value_new_register(int reg);
 
dfvm_value_t*
dfvm_value_new_drange(drange_t *dr);
 
dfvm_value_t*
dfvm_value_new_funcdef(df_func_def_t *funcdef);
 
dfvm_value_t*
dfvm_value_new_pcre(ws_regex_t *re);
 
dfvm_value_t*
dfvm_value_new_uint(unsigned num);
 
void
dfvm_dump(FILE *f, dfilter_t *df, uint16_t flags);
 
char *
dfvm_dump_str(wmem_allocator_t *alloc, dfilter_t *df,  uint16_t flags);
 
bool
dfvm_apply(dfilter_t *df, proto_tree *tree);
 
bool
dfvm_apply_full(dfilter_t *df, proto_tree *tree, GPtrArray **fvals);
 
fvalue_t *
dfvm_get_raw_fvalue(const field_info *fi);
 
#endif