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#ifndef NFTABLES_STATEMENT_H
#define NFTABLES_STATEMENT_H
#include <list.h>
#include <expression.h>
extern struct stmt *expr_stmt_alloc(const struct location *loc,
struct expr *expr);
extern struct stmt *verdict_stmt_alloc(const struct location *loc,
struct expr *expr);
struct counter_stmt {
uint64_t packets;
uint64_t bytes;
};
extern struct stmt *counter_stmt_alloc(const struct location *loc);
struct payload_stmt {
struct expr *expr;
struct expr *val;
};
extern struct stmt *payload_stmt_alloc(const struct location *loc,
struct expr *payload, struct expr *expr);
#include <meta.h>
struct meta_stmt {
enum nft_meta_keys key;
const struct meta_template *tmpl;
struct expr *expr;
};
extern struct stmt *meta_stmt_alloc(const struct location *loc,
enum nft_meta_keys key,
struct expr *expr);
enum {
STMT_LOG_PREFIX = (1 << 0),
STMT_LOG_SNAPLEN = (1 << 1),
STMT_LOG_GROUP = (1 << 2),
STMT_LOG_QTHRESHOLD = (1 << 3),
STMT_LOG_LEVEL = (1 << 4),
};
struct log_stmt {
const char *prefix;
unsigned int snaplen;
uint16_t group;
uint16_t qthreshold;
uint32_t level;
uint32_t flags;
};
extern struct stmt *log_stmt_alloc(const struct location *loc);
struct limit_stmt {
uint64_t rate;
uint64_t unit;
enum nft_limit_type type;
uint32_t burst;
uint32_t flags;
};
extern struct stmt *limit_stmt_alloc(const struct location *loc);
struct reject_stmt {
struct expr *expr;
enum nft_reject_types type;
int8_t icmp_code;
unsigned int family;
};
extern struct stmt *reject_stmt_alloc(const struct location *loc);
struct nat_stmt {
enum nft_nat_types type;
struct expr *addr;
struct expr *proto;
uint32_t flags;
};
extern struct stmt *nat_stmt_alloc(const struct location *loc);
struct masq_stmt {
uint32_t flags;
struct expr *proto;
};
extern struct stmt *masq_stmt_alloc(const struct location *loc);
struct redir_stmt {
struct expr *proto;
uint32_t flags;
};
extern struct stmt *redir_stmt_alloc(const struct location *loc);
struct queue_stmt {
struct expr *queue;
uint16_t flags;
};
extern struct stmt *queue_stmt_alloc(const struct location *loc);
#include <ct.h>
struct ct_stmt {
enum nft_ct_keys key;
const struct ct_template *tmpl;
struct expr *expr;
};
extern struct stmt *ct_stmt_alloc(const struct location *loc,
enum nft_ct_keys key,
struct expr *expr);
struct dup_stmt {
struct expr *to;
struct expr *dev;
};
struct stmt *dup_stmt_alloc(const struct location *loc);
uint32_t dup_stmt_type(const char *type);
struct fwd_stmt {
struct expr *to;
};
struct stmt *fwd_stmt_alloc(const struct location *loc);
uint32_t fwd_stmt_type(const char *type);
struct set_stmt {
struct expr *set;
struct expr *key;
enum nft_dynset_ops op;
};
extern struct stmt *set_stmt_alloc(const struct location *loc);
struct flow_stmt {
struct expr *set;
struct expr *key;
struct stmt *stmt;
const char *table;
};
extern struct stmt *flow_stmt_alloc(const struct location *loc);
/**
* enum stmt_types - statement types
*
* @STMT_INVALID: uninitialised
* @STMT_EXPRESSION: expression statement (relational)
* @STMT_VERDICT: verdict statement
* @STMT_FLOW: flow statement
* @STMT_COUNTER: counters
* @STMT_PAYLOAD: payload statement
* @STMT_META: meta statement
* @STMT_LIMIT: limit statement
* @STMT_LOG: log statement
* @STMT_REJECT: REJECT statement
* @STMT_NAT: NAT statement
* @STMT_MASQ: masquerade statement
* @STMT_REDIR: redirect statement
* @STMT_QUEUE: QUEUE statement
* @STMT_CT: conntrack statement
* @STMT_SET: set statement
* @STMT_DUP: dup statement
* @STMT_FWD: forward statement
*/
enum stmt_types {
STMT_INVALID,
STMT_EXPRESSION,
STMT_VERDICT,
STMT_FLOW,
STMT_COUNTER,
STMT_PAYLOAD,
STMT_META,
STMT_LIMIT,
STMT_LOG,
STMT_REJECT,
STMT_NAT,
STMT_MASQ,
STMT_REDIR,
STMT_QUEUE,
STMT_CT,
STMT_SET,
STMT_DUP,
STMT_FWD,
};
/**
* struct stmt_ops
*
* @type: statement type
* @name: name
* @destroy: destructor
* @print: function to print statement
*/
struct stmt;
struct stmt_ops {
enum stmt_types type;
const char *name;
void (*destroy)(struct stmt *stmt);
void (*print)(const struct stmt *stmt);
};
enum stmt_flags {
STMT_F_TERMINAL = 0x1,
STMT_F_STATEFUL = 0x2,
};
/**
* struct stmt
*
* @list: rule list node
* @ops: statement ops
* @location: location where the statement was defined
* @flags: statement flags
* @union: type specific data
*/
struct stmt {
struct list_head list;
const struct stmt_ops *ops;
struct location location;
enum stmt_flags flags;
union {
struct expr *expr;
struct flow_stmt flow;
struct counter_stmt counter;
struct payload_stmt payload;
struct meta_stmt meta;
struct log_stmt log;
struct limit_stmt limit;
struct reject_stmt reject;
struct nat_stmt nat;
struct masq_stmt masq;
struct redir_stmt redir;
struct queue_stmt queue;
struct ct_stmt ct;
struct set_stmt set;
struct dup_stmt dup;
struct fwd_stmt fwd;
};
};
extern struct stmt *stmt_alloc(const struct location *loc,
const struct stmt_ops *ops);
int stmt_evaluate(struct eval_ctx *ctx, struct stmt *stmt);
extern void stmt_free(struct stmt *stmt);
extern void stmt_list_free(struct list_head *list);
extern void stmt_print(const struct stmt *stmt);
#endif /* NFTABLES_STATEMENT_H */
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