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#ifndef NFTABLES_NETLINK_H
#define NFTABLES_NETLINK_H
#include <libnftnl/table.h>
#include <libnftnl/chain.h>
#include <libnftnl/rule.h>
#include <libnftnl/expr.h>
#include <libnftnl/set.h>
#include <libnftnl/object.h>
#include <linux/netlink.h>
#include <linux/netfilter/nf_tables.h>
#include <rule.h>
struct netlink_parse_ctx {
struct list_head *msgs;
struct table *table;
struct rule *rule;
struct stmt *stmt;
struct expr *registers[1 + NFT_REG32_15 - NFT_REG32_00 + 1];
};
struct rule_pp_ctx {
struct proto_ctx pctx;
struct payload_dep_ctx pdctx;
struct stmt *stmt;
};
extern const struct input_descriptor indesc_netlink;
extern const struct location netlink_location;
/**
* struct netlink_ctx
*
* @msgs: message queue
* @list: list of parsed rules/chains/tables
* @set: current set
* @data: pointer to pass data to callback
* @seqnum: sequence number
*/
struct netlink_ctx {
struct list_head *msgs;
struct list_head list;
struct set *set;
const void *data;
uint32_t seqnum;
bool batch_supported;
};
extern struct nftnl_table *alloc_nftnl_table(const struct handle *h);
extern struct nftnl_chain *alloc_nftnl_chain(const struct handle *h);
extern struct nftnl_rule *alloc_nftnl_rule(const struct handle *h);
extern struct nftnl_expr *alloc_nft_expr(const char *name);
extern struct nftnl_set *alloc_nftnl_set(const struct handle *h);
struct nft_data_linearize {
uint32_t len;
uint32_t value[4];
char chain[NFT_CHAIN_MAXNAMELEN];
int verdict;
};
struct nft_data_delinearize {
uint32_t len;
const uint32_t *value;
const char *chain;
int verdict;
};
static inline unsigned int netlink_register_space(unsigned int size)
{
return div_round_up(size, NFT_REG32_SIZE * BITS_PER_BYTE);
}
static inline unsigned int netlink_padded_len(unsigned int size)
{
return netlink_register_space(size) * NFT_REG32_SIZE * BITS_PER_BYTE;
}
static inline unsigned int netlink_padding_len(unsigned int size)
{
return netlink_padded_len(size) - size;
}
extern void netlink_gen_data(const struct expr *expr,
struct nft_data_linearize *data);
extern void netlink_gen_raw_data(const mpz_t value, enum byteorder byteorder,
unsigned int len,
struct nft_data_linearize *data);
extern struct expr *netlink_alloc_value(const struct location *loc,
const struct nft_data_delinearize *nld);
extern struct expr *netlink_alloc_data(const struct location *loc,
const struct nft_data_delinearize *nld,
enum nft_registers dreg);
extern void netlink_linearize_rule(struct netlink_ctx *ctx,
struct nftnl_rule *nlr,
const struct rule *rule);
extern struct rule *netlink_delinearize_rule(struct netlink_ctx *ctx,
struct nftnl_rule *r);
extern int netlink_add_rule(struct netlink_ctx *ctx, const struct handle *h,
const struct rule *rule, uint32_t flags);
extern int netlink_delete_rule(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_rule_list(struct netlink_ctx *ctx, const struct handle *h,
const struct list_head *rule_list);
extern int netlink_add_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct rule *rule, uint32_t flags);
extern int netlink_del_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
extern int netlink_replace_rule_batch(struct netlink_ctx *ctx,
const struct handle *h,
const struct rule *rule,
const struct location *loc);
extern int netlink_add_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc,
const struct chain *chain, bool excl);
extern int netlink_rename_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, const char *name);
extern int netlink_delete_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_chains(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_flush_chain(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc,
const struct table *table, bool excl);
extern int netlink_delete_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_tables(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, struct table *table);
extern int netlink_list_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_flush_table(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_add_set(struct netlink_ctx *ctx, const struct handle *h,
struct set *set, bool excl);
extern int netlink_delete_set(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_sets(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_get_set(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern struct stmt *netlink_parse_set_expr(const struct set *set,
const struct nftnl_expr *nle);
extern int netlink_add_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct expr *expr, bool excl);
extern int netlink_delete_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct expr *expr);
extern int netlink_get_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc, struct set *set);
extern int netlink_flush_setelems(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern int netlink_list_objs(struct netlink_ctx *ctx, const struct handle *h,
const struct location *loc);
extern void netlink_dump_table(const struct nftnl_table *nlt);
extern void netlink_dump_chain(const struct nftnl_chain *nlc);
extern void netlink_dump_rule(const struct nftnl_rule *nlr);
extern void netlink_dump_expr(const struct nftnl_expr *nle);
extern void netlink_dump_set(const struct nftnl_set *nls);
extern int netlink_batch_send(struct list_head *err_list);
extern void netlink_genid_get(void);
extern void netlink_restart(void);
#define netlink_abi_error() \
__netlink_abi_error(__FILE__, __LINE__, strerror(errno));
extern void __noreturn __netlink_abi_error(const char *file, int line, const char *reason);
extern int netlink_io_error(struct netlink_ctx *ctx,
const struct location *loc, const char *fmt, ...);
#define netlink_init_error() \
__netlink_init_error(__FILE__, __LINE__, strerror(errno));
extern void __noreturn __netlink_init_error(const char *file, int line, const char *reason);
extern int netlink_flush_ruleset(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
extern struct nftnl_ruleset *netlink_dump_ruleset(struct netlink_ctx *ctx,
const struct handle *h,
const struct location *loc);
struct netlink_mon_handler {
uint32_t monitor_flags;
uint32_t format;
struct netlink_ctx *ctx;
const struct location *loc;
bool cache_needed;
};
extern int netlink_monitor(struct netlink_mon_handler *monhandler);
bool netlink_batch_supported(void);
#endif /* NFTABLES_NETLINK_H */
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