It seems to be copied from one of the versions of glibc to address
build issues caused by missing functionality.

Since then even with glibc-2.13 and Linux Kernel headers from 3.2
we able to build iproute2 tools (including ss) successfuly.

This effectively reverts commit 719b958bbdfd ("ss: report ecnseen")
and original one introducing this include commit 76e5d2c39201 ("add
include/netinet/tcp.h").

Any missing functionality and compatibility stuff must go to "compat"
subdirectory in include/.

Signed-off-by: Serhey Popovych <serhe.popov...@gmail.com>
---
 include/netinet/tcp.h |  231 -------------------------------------------------
 1 file changed, 231 deletions(-)
 delete mode 100644 include/netinet/tcp.h

diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h
deleted file mode 100644
index 3f890a1..0000000
--- a/include/netinet/tcp.h
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Copyright (c) 1982, 1986, 1993
- *     The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *     @(#)tcp.h       8.1 (Berkeley) 6/10/93
- */
-
-#ifndef _NETINET_TCP_H
-#define _NETINET_TCP_H 1
-
-#include <features.h>
-
-/*
- * User-settable options (used with setsockopt).
- */
-#define        TCP_NODELAY      1      /* Don't delay send to coalesce packets 
 */
-#define        TCP_MAXSEG       2      /* Set maximum segment size  */
-#define TCP_CORK        3      /* Control sending of partial frames  */
-#define TCP_KEEPIDLE    4      /* Start keeplives after this period */
-#define TCP_KEEPINTVL   5      /* Interval between keepalives */
-#define TCP_KEEPCNT     6      /* Number of keepalives before death */
-#define TCP_SYNCNT      7      /* Number of SYN retransmits */
-#define TCP_LINGER2     8      /* Life time of orphaned FIN-WAIT-2 state */
-#define TCP_DEFER_ACCEPT 9     /* Wake up listener only when data arrive */
-#define TCP_WINDOW_CLAMP 10    /* Bound advertised window */
-#define TCP_INFO        11     /* Information about this connection. */
-#define        TCP_QUICKACK     12     /* Bock/reenable quick ACKs.  */
-#define TCP_CONGESTION  13     /* Congestion control algorithm.  */
-
-#ifdef __USE_MISC
-# include <sys/types.h>
-
-# ifdef __FAVOR_BSD
-typedef        u_int32_t tcp_seq;
-/*
- * TCP header.
- * Per RFC 793, September, 1981.
- */
-struct tcphdr
-  {
-    u_int16_t th_sport;                /* source port */
-    u_int16_t th_dport;                /* destination port */
-    tcp_seq th_seq;            /* sequence number */
-    tcp_seq th_ack;            /* acknowledgement number */
-#  if __BYTE_ORDER == __LITTLE_ENDIAN
-    u_int8_t th_x2:4;          /* (unused) */
-    u_int8_t th_off:4;         /* data offset */
-#  endif
-#  if __BYTE_ORDER == __BIG_ENDIAN
-    u_int8_t th_off:4;         /* data offset */
-    u_int8_t th_x2:4;          /* (unused) */
-#  endif
-    u_int8_t th_flags;
-#  define TH_FIN       0x01
-#  define TH_SYN       0x02
-#  define TH_RST       0x04
-#  define TH_PUSH      0x08
-#  define TH_ACK       0x10
-#  define TH_URG       0x20
-    u_int16_t th_win;          /* window */
-    u_int16_t th_sum;          /* checksum */
-    u_int16_t th_urp;          /* urgent pointer */
-};
-
-# else /* !__FAVOR_BSD */
-struct tcphdr
-  {
-    u_int16_t source;
-    u_int16_t dest;
-    u_int32_t seq;
-    u_int32_t ack_seq;
-#  if __BYTE_ORDER == __LITTLE_ENDIAN
-    u_int16_t res1:4;
-    u_int16_t doff:4;
-    u_int16_t fin:1;
-    u_int16_t syn:1;
-    u_int16_t rst:1;
-    u_int16_t psh:1;
-    u_int16_t ack:1;
-    u_int16_t urg:1;
-    u_int16_t res2:2;
-#  elif __BYTE_ORDER == __BIG_ENDIAN
-    u_int16_t doff:4;
-    u_int16_t res1:4;
-    u_int16_t res2:2;
-    u_int16_t urg:1;
-    u_int16_t ack:1;
-    u_int16_t psh:1;
-    u_int16_t rst:1;
-    u_int16_t syn:1;
-    u_int16_t fin:1;
-#  else
-#   error "Adjust your <bits/endian.h> defines"
-#  endif
-    u_int16_t window;
-    u_int16_t check;
-    u_int16_t urg_ptr;
-};
-# endif /* __FAVOR_BSD */
-
-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 */
-};
-
-# define TCPOPT_EOL            0
-# define TCPOPT_NOP            1
-# define TCPOPT_MAXSEG         2
-# define TCPOLEN_MAXSEG                4
-# define TCPOPT_WINDOW         3
-# define TCPOLEN_WINDOW                3
-# define TCPOPT_SACK_PERMITTED 4               /* Experimental */
-# define TCPOLEN_SACK_PERMITTED        2
-# define TCPOPT_SACK           5               /* Experimental */
-# define TCPOPT_TIMESTAMP      8
-# define TCPOLEN_TIMESTAMP     10
-# define TCPOLEN_TSTAMP_APPA   (TCPOLEN_TIMESTAMP+2) /* appendix A */
-
-# define TCPOPT_TSTAMP_HDR     \
-    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
-
-/*
- * Default maximum segment size for TCP.
- * With an IP MSS of 576, this is 536,
- * but 512 is probably more convenient.
- * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
- */
-# define TCP_MSS       512
-
-# define TCP_MAXWIN    65535   /* largest value for (unscaled) window */
-
-# define TCP_MAX_WINSHIFT      14      /* maximum window shift */
-
-# define SOL_TCP               6       /* TCP level */
-
-
-# define TCPI_OPT_TIMESTAMPS   1
-# define TCPI_OPT_SACK         2
-# define TCPI_OPT_WSCALE       4
-# define TCPI_OPT_ECN          8
-# define TCPI_OPT_ECN_SEEN     16
-
-/* Values for tcpi_state.  */
-enum tcp_ca_state
-{
-  TCP_CA_Open = 0,
-  TCP_CA_Disorder = 1,
-  TCP_CA_CWR = 2,
-  TCP_CA_Recovery = 3,
-  TCP_CA_Loss = 4
-};
-
-struct tcp_info
-{
-  u_int8_t     tcpi_state;
-  u_int8_t     tcpi_ca_state;
-  u_int8_t     tcpi_retransmits;
-  u_int8_t     tcpi_probes;
-  u_int8_t     tcpi_backoff;
-  u_int8_t     tcpi_options;
-  u_int8_t     tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
-
-  u_int32_t    tcpi_rto;
-  u_int32_t    tcpi_ato;
-  u_int32_t    tcpi_snd_mss;
-  u_int32_t    tcpi_rcv_mss;
-
-  u_int32_t    tcpi_unacked;
-  u_int32_t    tcpi_sacked;
-  u_int32_t    tcpi_lost;
-  u_int32_t    tcpi_retrans;
-  u_int32_t    tcpi_fackets;
-
-  /* Times. */
-  u_int32_t    tcpi_last_data_sent;
-  u_int32_t    tcpi_last_ack_sent;     /* Not remembered, sorry.  */
-  u_int32_t    tcpi_last_data_recv;
-  u_int32_t    tcpi_last_ack_recv;
-
-  /* Metrics. */
-  u_int32_t    tcpi_pmtu;
-  u_int32_t    tcpi_rcv_ssthresh;
-  u_int32_t    tcpi_rtt;
-  u_int32_t    tcpi_rttvar;
-  u_int32_t    tcpi_snd_ssthresh;
-  u_int32_t    tcpi_snd_cwnd;
-  u_int32_t    tcpi_advmss;
-  u_int32_t    tcpi_reordering;
-  u_int32_t    tcpi_rcv_rtt;
-  u_int32_t    tcpi_rcv_space;
-  u_int32_t    tcpi_total_retrans;
-
-};
-
-#endif /* Misc.  */
-
-#endif /* netinet/tcp.h */
-- 
1.7.10.4

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