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#ifndef NFTABLES_TCPOPT_H
#define NFTABLES_TCPOPT_H
#include <proto.h>
#include <exthdr.h>
#include <statement.h>
extern struct expr *tcpopt_expr_alloc(const struct location *loc,
unsigned int kind, unsigned int field);
extern void tcpopt_init_raw(struct expr *expr, uint8_t type,
unsigned int offset, unsigned int len,
uint32_t flags);
extern bool tcpopt_find_template(struct expr *expr, const struct expr *mask,
unsigned int *shift);
/* TCP option numbers used on wire */
enum tcpopt_kind {
TCPOPT_KIND_EOL = 0,
TCPOPT_KIND_NOP = 1,
TCPOPT_KIND_MAXSEG = 2,
TCPOPT_KIND_WINDOW = 3,
TCPOPT_KIND_SACK_PERMITTED = 4,
TCPOPT_KIND_SACK = 5,
TCPOPT_KIND_TIMESTAMP = 8,
TCPOPT_KIND_ECHO = 8,
__TCPOPT_KIND_MAX,
/* extra oob info, internal to nft */
TCPOPT_KIND_SACK1 = 256,
TCPOPT_KIND_SACK2 = 257,
TCPOPT_KIND_SACK3 = 258,
};
/* Internal identifiers */
enum tcpopt_common {
TCPOPT_COMMON_KIND,
TCPOPT_COMMON_LENGTH,
};
enum tcpopt_maxseg {
TCPOPT_MAXSEG_KIND,
TCPOPT_MAXSEG_LENGTH,
TCPOPT_MAXSEG_SIZE,
};
enum tcpopt_timestamp {
TCPOPT_TS_KIND,
TCPOPT_TS_LENGTH,
TCPOPT_TS_TSVAL,
TCPOPT_TS_TSECR,
};
enum tcpopt_windowscale {
TCPOPT_WINDOW_KIND,
TCPOPT_WINDOW_LENGTH,
TCPOPT_WINDOW_COUNT,
};
enum tcpopt_hdr_field_sack {
TCPOPT_SACK_KIND,
TCPOPT_SACK_LENGTH,
TCPOPT_SACK_LEFT,
TCPOPT_SACK_RIGHT,
TCPOPT_SACK_LEFT1,
TCPOPT_SACK_RIGHT1,
TCPOPT_SACK_LEFT2,
TCPOPT_SACK_RIGHT2,
TCPOPT_SACK_LEFT3,
TCPOPT_SACK_RIGHT3,
};
extern const struct exthdr_desc *tcpopt_protocols[__TCPOPT_KIND_MAX];
#endif /* NFTABLES_TCPOPT_H */
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