diff options
Diffstat (limited to 'include/linux/netfilter/nf_conntrack_tcp.h')
| -rw-r--r-- | include/linux/netfilter/nf_conntrack_tcp.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/netfilter/nf_conntrack_tcp.h b/include/linux/netfilter/nf_conntrack_tcp.h new file mode 100644 index 000000000..f9e3a6630 --- /dev/null +++ b/include/linux/netfilter/nf_conntrack_tcp.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _NF_CONNTRACK_TCP_H +#define _NF_CONNTRACK_TCP_H + +#include <uapi/linux/netfilter/nf_conntrack_tcp.h> + + +struct ip_ct_tcp_state { + u_int32_t td_end; /* max of seq + len */ + u_int32_t td_maxend; /* max of ack + max(win, 1) */ + u_int32_t td_maxwin; /* max(win) */ + u_int32_t td_maxack; /* max of ack */ + u_int8_t td_scale; /* window scale factor */ + u_int8_t flags; /* per direction options */ +}; + +struct ip_ct_tcp { + struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */ + u_int8_t state; /* state of the connection (enum tcp_conntrack) */ + /* For detecting stale connections */ + u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */ + u_int8_t retrans; /* Number of retransmitted packets */ + u_int8_t last_index; /* Index of the last packet */ + u_int32_t last_seq; /* Last sequence number seen in dir */ + u_int32_t last_ack; /* Last sequence number seen in opposite dir */ + u_int32_t last_end; /* Last seq + len */ + u_int16_t last_win; /* Last window advertisement seen in dir */ + /* For SYN packets while we may be out-of-sync */ + u_int8_t last_wscale; /* Last window scaling factor seen */ + u_int8_t last_flags; /* Last flags set */ +}; + +#endif /* _NF_CONNTRACK_TCP_H */ |