A Linux netfilter module to aid in (d)dos protection
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#ifndef _TS3INIT_MATCH_H
#define _TS3INIT_MATCH_H
/* Enums for get_cookie and get_puzzle matches */
enum
{
CHK_COMMON_CLIENT_VERSION = 1 << 0,
CHK_COMMON_VALID_MASK = (1 << 1) -1
};
/* Enums and structs for get_cookie */
enum
{
CHK_GET_COOKIE_CHECK_TIMESTAMP = 1 << 0,
CHK_GET_COOKIE_VALID_MASK = (1 << 1) -1
};
struct xt_ts3init_get_cookie_mtinfo
{
__u8 common_options;
__u8 specific_options;
__u16 reserved1;
__u32 min_client_version;
__u32 max_utc_offset;
};
/* Enums and structs for get_puzzle */
enum
{
CHK_GET_PUZZLE_CHECK_COOKIE = 1 << 0,
CHK_GET_PUZZLE_VALID_MASK = (1 << 1) - 1,
SEED_LEN = 60
};
struct xt_ts3init_get_puzzle_mtinfo
{
__u8 common_options;
__u8 specific_options;
__u16 reserved1;
__u32 min_client_version;
__u8 cookie_seed[SEED_LEN];
};
#endif /* _TS3INIT_MATCH_H */