A Linux netfilter module to aid in (d)dos protection
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#ifndef _TS3INIT_COOKIE_H
#define _TS3INIT_COOKIE_H
enum {
SHA512_SIZE = 64,
SIP_KEY_SIZE = 16
};
struct xt_ts3init_cookie_cache
{
time_t time[2];
union
{
__u8 seed8[SHA512_SIZE*2];
__u64 seed64[(SHA512_SIZE/sizeof(__u64))*2];
};
};
__u64* ts3init_get_cookie_seed(time_t current_time, __u8 packet_index,
struct xt_ts3init_cookie_cache* cache,
const __u8* cookie_seed);
int ts3init_calculate_cookie(const struct sk_buff *skb,
struct xt_action_param *par, struct udphdr *udp,
u64 k0, u64 k1, __u64* out);
#endif /* _TS3INIT_COOKIE_H */