linux-imx

/*

 * 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 module.

 *

 * Version: @(#)tcp.h   1.0.5   05/23/93

 *

 * Authors: Ross Biro

 *      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 _TCP_H

#define _TCP_H

​

#define FASTRETRANS_DEBUG 1

​

#include <linux/list.h>

#include <linux/tcp.h>

#include <linux/bug.h>

#include <linux/slab.h>

#include <linux/cache.h>

#include <linux/percpu.h>

#include <linux/skbuff.h>

#include <linux/cryptohash.h>

#include <linux/kref.h>

#include <linux/ktime.h>

​

#include <net/inet_connection_sock.h>

#include <net/inet_timewait_sock.h>

#include <net/inet_hashtables.h>

#include <net/checksum.h>

#include <net/request_sock.h>

#include <net/sock_reuseport.h>

#include <net/sock.h>

#include <net/snmp.h>

#include <net/ip.h>

#include <net/tcp_states.h>

#include <net/inet_ecn.h>

#include <net/dst.h>

​

#include <linux/seq_file.h>

#include <linux/memcontrol.h>

#include <linux/bpf-cgroup.h>

​

extern struct inet_hashinfo tcp_hashinfo;

​

extern struct percpu_counter tcp_orphan_count;

void tcp_time_wait(struct sock *sk, int state, int timeo);

​

#define MAX_TCP_HEADER  (128 + MAX_HEADER)

#define MAX_TCP_OPTION_SPACE 40

​

/*

 * Never offer a window over 32767 without using window scaling. Some

 * poor stacks do signed 16bit maths!

 */

#define MAX_TCP_WINDOW      32767U

​

/* Minimal accepted MSS. It is (60+60+8) - (20+20). */

#define TCP_MIN_MSS     88U

​

/* The least MTU to use for probing */

#define TCP_BASE_MSS        1024

​

/* probing interval, default to 10 minutes as per RFC4821 */

#define TCP_PROBE_INTERVAL  600

​

/* Specify interval when tcp mtu probing will stop */

#define TCP_PROBE_THRESHOLD 8

​

/* After receiving this amount of duplicate ACKs fast retransmit starts. */

#define TCP_FASTRETRANS_THRESH 3

​

/* Maximal number of ACKs sent quickly to accelerate slow-start. */

#define TCP_MAX_QUICKACKS   16U

​

/* Maximal number of window scale according to RFC1323 */

#define TCP_MAX_WSCALE      14U

​

/* urg_data states */

#define TCP_URG_VALID   0x0100

#define TCP_URG_NOTYET  0x0200

#define TCP_URG_READ    0x0400

​

#define TCP_RETR1   3   /*

                 * This is how many retries it does before it