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usr
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linux
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netfilter
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Filename :
nf_conntrack_tcp.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _NF_CONNTRACK_TCP_H #define _NF_CONNTRACK_TCP_H /* TCP tracking. */ #include <linux/types.h> /* This is exposed to userspace (ctnetlink) */ enum tcp_conntrack { TCP_CONNTRACK_NONE, TCP_CONNTRACK_SYN_SENT, TCP_CONNTRACK_SYN_RECV, TCP_CONNTRACK_ESTABLISHED, TCP_CONNTRACK_FIN_WAIT, TCP_CONNTRACK_CLOSE_WAIT, TCP_CONNTRACK_LAST_ACK, TCP_CONNTRACK_TIME_WAIT, TCP_CONNTRACK_CLOSE, TCP_CONNTRACK_LISTEN, /* obsolete */ #define TCP_CONNTRACK_SYN_SENT2 TCP_CONNTRACK_LISTEN TCP_CONNTRACK_MAX, TCP_CONNTRACK_IGNORE, TCP_CONNTRACK_RETRANS, TCP_CONNTRACK_UNACK, TCP_CONNTRACK_TIMEOUT_MAX }; /* Window scaling is advertised by the sender */ #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 /* SACK is permitted by the sender */ #define IP_CT_TCP_FLAG_SACK_PERM 0x02 /* This sender sent FIN first */ #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 /* Be liberal in window checking */ #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 /* Has unacknowledged data */ #define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10 /* The field td_maxack has been set */ #define IP_CT_TCP_FLAG_MAXACK_SET 0x20 /* Marks possibility for expected RFC5961 challenge ACK */ #define IP_CT_EXP_CHALLENGE_ACK 0x40 /* Simultaneous open initialized */ #define IP_CT_TCP_SIMULTANEOUS_OPEN 0x80 struct nf_ct_tcp_flags { __u8 flags; __u8 mask; }; #endif /* _NF_CONNTRACK_TCP_H */