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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
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#ifndef _IP_CONNTRACK_TCP_H
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#define _IP_CONNTRACK_TCP_H
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/* TCP tracking. */
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enum tcp_conntrack {
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TCP_CONNTRACK_NONE,
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TCP_CONNTRACK_SYN_SENT,
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TCP_CONNTRACK_SYN_RECV,
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TCP_CONNTRACK_ESTABLISHED,
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TCP_CONNTRACK_FIN_WAIT,
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TCP_CONNTRACK_CLOSE_WAIT,
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TCP_CONNTRACK_LAST_ACK,
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TCP_CONNTRACK_TIME_WAIT,
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TCP_CONNTRACK_CLOSE,
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TCP_CONNTRACK_LISTEN,
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TCP_CONNTRACK_MAX,
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TCP_CONNTRACK_IGNORE
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};
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/* Window scaling is advertised by the sender */
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#define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01
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/* SACK is permitted by the sender */
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#define IP_CT_TCP_FLAG_SACK_PERM 0x02
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/* This sender sent FIN first */
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#define IP_CT_TCP_FLAG_CLOSE_INIT 0x03
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struct ip_ct_tcp_state {
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u_int32_t td_end; /* max of seq + len */
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u_int32_t td_maxend; /* max of ack + max(win, 1) */
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u_int32_t td_maxwin; /* max(win) */
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u_int8_t td_scale; /* window scale factor */
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u_int8_t loose; /* used when connection picked up from the middle */
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u_int8_t flags; /* per direction options */
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};
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struct ip_ct_tcp
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{
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struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */
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u_int8_t state; /* state of the connection (enum tcp_conntrack) */
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/* For detecting stale connections */
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u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */
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u_int8_t retrans; /* Number of retransmitted packets */
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u_int8_t last_index; /* Index of the last packet */
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u_int32_t last_seq; /* Last sequence number seen in dir */
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u_int32_t last_ack; /* Last sequence number seen in opposite dir */
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u_int32_t last_end; /* Last seq + len */
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};
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#endif /* _IP_CONNTRACK_TCP_H */
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