source: svn/trunk/newcon3bcm2_21bu/toolchain/mipsel-linux-uclibc/include/netinet/tcp.h @ 48

Last change on this file since 48 was 2, checked in by jglee, 11 years ago

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1/*
2 * Copyright (c) 1982, 1986, 1993
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *      @(#)tcp.h       8.1 (Berkeley) 6/10/93
30 */
31
32#ifndef _NETINET_TCP_H
33#define _NETINET_TCP_H  1
34
35#include <features.h>
36
37/*
38 * User-settable options (used with setsockopt).
39 */
40#define TCP_NODELAY      1      /* Don't delay send to coalesce packets  */
41#define TCP_MAXSEG       2      /* Set maximum segment size  */
42#define TCP_CORK         3      /* Control sending of partial frames  */
43#define TCP_KEEPIDLE     4      /* Start keeplives after this period */
44#define TCP_KEEPINTVL    5      /* Interval between keepalives */
45#define TCP_KEEPCNT      6      /* Number of keepalives before death */
46#define TCP_SYNCNT       7      /* Number of SYN retransmits */
47#define TCP_LINGER2      8      /* Life time of orphaned FIN-WAIT-2 state */
48#define TCP_DEFER_ACCEPT 9      /* Wake up listener only when data arrive */
49#define TCP_WINDOW_CLAMP 10     /* Bound advertised window */
50#define TCP_INFO         11     /* Information about this connection. */
51#define TCP_QUICKACK     12     /* Bock/reenable quick ACKs.  */
52
53#ifdef __USE_MISC
54# include <sys/types.h>
55
56# ifdef __FAVOR_BSD
57typedef u_int32_t tcp_seq;
58/*
59 * TCP header.
60 * Per RFC 793, September, 1981.
61 */
62struct tcphdr
63  {
64    u_int16_t th_sport;         /* source port */
65    u_int16_t th_dport;         /* destination port */
66    tcp_seq th_seq;             /* sequence number */
67    tcp_seq th_ack;             /* acknowledgement number */
68#  if __BYTE_ORDER == __LITTLE_ENDIAN
69    u_int8_t th_x2:4;           /* (unused) */
70    u_int8_t th_off:4;          /* data offset */
71#  endif
72#  if __BYTE_ORDER == __BIG_ENDIAN
73    u_int8_t th_off:4;          /* data offset */
74    u_int8_t th_x2:4;           /* (unused) */
75#  endif
76    u_int8_t th_flags;
77#  define TH_FIN        0x01
78#  define TH_SYN        0x02
79#  define TH_RST        0x04
80#  define TH_PUSH       0x08
81#  define TH_ACK        0x10
82#  define TH_URG        0x20
83    u_int16_t th_win;           /* window */
84    u_int16_t th_sum;           /* checksum */
85    u_int16_t th_urp;           /* urgent pointer */
86};
87
88# else /* !__FAVOR_BSD */
89struct tcphdr
90  {
91    u_int16_t source;
92    u_int16_t dest;
93    u_int32_t seq;
94    u_int32_t ack_seq;
95#  if __BYTE_ORDER == __LITTLE_ENDIAN
96    u_int16_t res1:4;
97    u_int16_t doff:4;
98    u_int16_t fin:1;
99    u_int16_t syn:1;
100    u_int16_t rst:1;
101    u_int16_t psh:1;
102    u_int16_t ack:1;
103    u_int16_t urg:1;
104    u_int16_t res2:2;
105#  elif __BYTE_ORDER == __BIG_ENDIAN
106    u_int16_t doff:4;
107    u_int16_t res1:4;
108    u_int16_t res2:2;
109    u_int16_t urg:1;
110    u_int16_t ack:1;
111    u_int16_t psh:1;
112    u_int16_t rst:1;
113    u_int16_t syn:1;
114    u_int16_t fin:1;
115#  else
116#   error "Adjust your <bits/endian.h> defines"
117#  endif
118    u_int16_t window;
119    u_int16_t check;
120    u_int16_t urg_ptr;
121};
122# endif /* __FAVOR_BSD */
123
124enum
125{
126  TCP_ESTABLISHED = 1,
127  TCP_SYN_SENT,
128  TCP_SYN_RECV,
129  TCP_FIN_WAIT1,
130  TCP_FIN_WAIT2,
131  TCP_TIME_WAIT,
132  TCP_CLOSE,
133  TCP_CLOSE_WAIT,
134  TCP_LAST_ACK,
135  TCP_LISTEN,
136  TCP_CLOSING   /* now a valid state */
137};
138
139# define TCPOPT_EOL             0
140# define TCPOPT_NOP             1
141# define TCPOPT_MAXSEG          2
142# define TCPOLEN_MAXSEG         4
143# define TCPOPT_WINDOW          3
144# define TCPOLEN_WINDOW         3
145# define TCPOPT_SACK_PERMITTED  4               /* Experimental */
146# define TCPOLEN_SACK_PERMITTED 2
147# define TCPOPT_SACK            5               /* Experimental */
148# define TCPOPT_TIMESTAMP       8
149# define TCPOLEN_TIMESTAMP      10
150# define TCPOLEN_TSTAMP_APPA    (TCPOLEN_TIMESTAMP+2) /* appendix A */
151
152# define TCPOPT_TSTAMP_HDR      \
153    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
154
155/*
156 * Default maximum segment size for TCP.
157 * With an IP MSS of 576, this is 536,
158 * but 512 is probably more convenient.
159 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
160 */
161# define TCP_MSS        512
162
163# define TCP_MAXWIN     65535   /* largest value for (unscaled) window */
164
165# define TCP_MAX_WINSHIFT       14      /* maximum window shift */
166
167# define SOL_TCP                6       /* TCP level */
168
169
170# define TCPI_OPT_TIMESTAMPS    1
171# define TCPI_OPT_SACK          2
172# define TCPI_OPT_WSCALE        4
173# define TCPI_OPT_ECN           8
174
175/* Values for tcpi_state.  */
176enum tcp_ca_state
177{
178  TCP_CA_Open = 0,
179  TCP_CA_Disorder = 1,
180  TCP_CA_CWR = 2,
181  TCP_CA_Recovery = 3,
182  TCP_CA_Loss = 4
183};
184
185struct tcp_info
186{
187  u_int8_t      tcpi_state;
188  u_int8_t      tcpi_ca_state;
189  u_int8_t      tcpi_retransmits;
190  u_int8_t      tcpi_probes;
191  u_int8_t      tcpi_backoff;
192  u_int8_t      tcpi_options;
193  u_int8_t      tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
194
195  u_int32_t     tcpi_rto;
196  u_int32_t     tcpi_ato;
197  u_int32_t     tcpi_snd_mss;
198  u_int32_t     tcpi_rcv_mss;
199
200  u_int32_t     tcpi_unacked;
201  u_int32_t     tcpi_sacked;
202  u_int32_t     tcpi_lost;
203  u_int32_t     tcpi_retrans;
204  u_int32_t     tcpi_fackets;
205
206  /* Times. */
207  u_int32_t     tcpi_last_data_sent;
208  u_int32_t     tcpi_last_ack_sent;     /* Not remembered, sorry.  */
209  u_int32_t     tcpi_last_data_recv;
210  u_int32_t     tcpi_last_ack_recv;
211
212  /* Metrics. */
213  u_int32_t     tcpi_pmtu;
214  u_int32_t     tcpi_rcv_ssthresh;
215  u_int32_t     tcpi_rtt;
216  u_int32_t     tcpi_rttvar;
217  u_int32_t     tcpi_snd_ssthresh;
218  u_int32_t     tcpi_snd_cwnd;
219  u_int32_t     tcpi_advmss;
220  u_int32_t     tcpi_reordering;
221};
222
223#endif /* Misc.  */
224
225#endif /* netinet/tcp.h */
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