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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Definitions for the TCP protocol.
- *
- * Version: @(#)tcp.h 1.0.2 04/28/93
- *
- * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _LINUX_TCP_H
- #define _LINUX_TCP_H
-
- #include <linux/types.h>
- #include <asm/byteorder.h>
-
- struct tcphdr {
- __u16 source;
- __u16 dest;
- __u32 seq;
- __u32 ack_seq;
- #if defined(__LITTLE_ENDIAN_BITFIELD)
- __u16 res1:4,
- doff:4,
- fin:1,
- syn:1,
- rst:1,
- psh:1,
- ack:1,
- urg:1,
- res2:2;
- #elif defined(__BIG_ENDIAN_BITFIELD)
- __u16 doff:4,
- res1:4,
- res2:2,
- urg:1,
- ack:1,
- psh:1,
- rst:1,
- syn:1,
- fin:1;
- #else
- #error "Adjust your <asm/byteorder.h> defines"
- #endif
- __u16 window;
- __u16 check;
- __u16 urg_ptr;
- };
-
-
- enum {
- TCP_ESTABLISHED = 1,
- TCP_SYN_SENT,
- TCP_SYN_RECV,
- TCP_FIN_WAIT1,
- TCP_FIN_WAIT2,
- TCP_TIME_WAIT,
- TCP_CLOSE,
- TCP_CLOSE_WAIT,
- TCP_LAST_ACK,
- TCP_LISTEN,
- TCP_CLOSING, /* now a valid state */
-
- TCP_MAX_STATES /* Leave at the end! */
- };
-
- #define TCP_STATE_MASK 0xF
- #define TCP_ACTION_FIN (1 << 7)
-
- enum {
- TCPF_ESTABLISHED = (1 << 1),
- TCPF_SYN_SENT = (1 << 2),
- TCPF_SYN_RECV = (1 << 3),
- TCPF_FIN_WAIT1 = (1 << 4),
- TCPF_FIN_WAIT2 = (1 << 5),
- TCPF_TIME_WAIT = (1 << 6),
- TCPF_CLOSE = (1 << 7),
- TCPF_CLOSE_WAIT = (1 << 8),
- TCPF_LAST_ACK = (1 << 9),
- TCPF_LISTEN = (1 << 10),
- TCPF_CLOSING = (1 << 11)
- };
-
- #endif /* _LINUX_TCP_H */
-