33 lines
740 B
C
33 lines
740 B
C
#ifndef SYN_COOKIE_H
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#define SYN_COOKIE_H
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#include <stdint.h>
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#include "massip-addr.h"
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/**
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* Create a hash of the src/dst IP/port combination. This allows us to match
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* incoming responses with their original requests
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*/
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uint64_t
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syn_cookie_ipv4( unsigned ip_dst, unsigned port_dst,
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unsigned ip_src, unsigned port_src,
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uint64_t entropy);
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uint64_t
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syn_cookie( ipaddress ip_dst, unsigned port_dst,
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ipaddress ip_src, unsigned port_src,
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uint64_t entropy);
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uint64_t
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syn_cookie_ipv6( ipv6address ip_dst, unsigned port_dst,
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ipv6address ip_src, unsigned port_src,
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uint64_t entropy);
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/**
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* Called on startup to set a secret key
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*/
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uint64_t get_entropy(void);
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#endif
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