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/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright 2023 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
#ifndef COOKER_H
#define COOKER_H
#define _GNU_SOURCE
#include <fcntl.h>
#include <unistd.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <arpa/inet.h>
#define TAGS_MAX 256
#define CALL_ARGS 6
struct num;
struct field;
struct select;
/**
* union desc - Description of lists of numbers, structs or selector fields
* @d_num: Pointer to a list of numbers and their labels
* @d_struct: Pointer to a struct description
* @d_select: Pointer to description of a selector
*/
union desc {
struct num *d_num;
struct field *d_struct;
struct select *d_select;
};
/**
* union value - Represent a generic value used internally by cooker
* @v_int: Value of type int
* @v_u32: Value of type u32
* @v_num: Value of type long long, or any other numeric type
* @v_str: String, directly from JSON
*/
union value {
int v_int;
uint32_t v_u32;
uint64_t v_u64;
long long v_num;
const char *v_str;
};
/**
* enum type - Types of values for arguments and fields within arguments
*/
enum type {
UNDEF = 0,
NONE,
INT,
INTMASK,
INTFLAGS,
U32,
U32MASK,
U32FLAGS,
U64,
U64MASK,
U64FLAGS,
LONG,
LONGMASK,
LONGFLAGS,
STRING,
STRUCT,
SELECT,
SELECTED,
PID,
PORT,
IPV4,
IPV6,
FDPATH,
TYPE_END,
};
#define TYPE_COUNT (TYPE_END - 1)
#define TYPE_IS_COMPOUND(t) ((t) == STRUCT || (t) == SELECT)
#define TYPE_IS_NUM(t) ((t) == INT || (t) == U32 || (t) == LONG)
/**
* struct num - A numeric value and its label
* @name: Label for numeric value
* @value: Numeric value
*/
struct num {
char *name;
long long value;
};
/**
* struct field - Field inside a struct
* @name: Name of field
* @type: Type of field
* @offset: Offset of field within struct, in bytes
* @strlen: Length of string for string types, 0 otherwise
* @desc: Description of possible values for field, or linked struct
*/
struct field {
char *name;
enum type type;
off_t offset;
size_t strlen;
union desc desc;
};
/**
* struct select_target - Description of value selected by selector field
* @type: Type of value
* @size: Size to dereference for pointers, 0 otherwise
* @desc: Description for selected value
*/
struct select_target {
enum type type; /* TODO: Almost a struct arg? */
size_t size;
union desc desc;
};
/**
* struct arg - Description of part of, or complete system call argument
* @pos: Index of argument in system call
* @name: JSON name used for matches and calls
* @type: Argument type
* @size: Size of pointed area if any, 0 otherwise
* @desc: Description of list of numbers, struct or selector field
*/
struct arg {
int pos;
char *name;
enum type type;
size_t size;
union desc desc;
};
/**
* struct select_num - List of possible selections based on numeric selector
* @value: Numeric value of the selector
* @target: Argument description defined by this selector
*/
struct select_num {
long long value;
struct arg target;
};
/**
* struct select - Association between argument description and selected values
* @field: Description of argument operating the selection
* @d_num: List of possible selections
*/
struct select {
struct field *field;
union {
struct select_num *d_num;
} desc;
};
#endif /* COOKER_H */
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