![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to tcp.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / bsd / netinet|
Return to tcp.h CVS log | Up to [Apple XNU] / XNU / bsd / netinet |
1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1982, 1986, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)tcp.h 8.1 (Berkeley) 6/10/93
55: */
56:
57: #ifndef _NETINET_TCP_H_
58: #define _NETINET_TCP_H_
59:
60: typedef u_int32_t tcp_seq;
61: typedef u_int32_t tcp_cc; /* connection count per rfc1644 */
62:
63: /*
64: * TCP header.
65: * Per RFC 793, September, 1981.
66: */
67: struct tcphdr {
68: u_short th_sport; /* source port */
69: u_short th_dport; /* destination port */
70: tcp_seq th_seq; /* sequence number */
71: tcp_seq th_ack; /* acknowledgement number */
72: #if BYTE_ORDER == LITTLE_ENDIAN
73: u_int th_x2:4, /* (unused) */
74: th_off:4; /* data offset */
75: #endif
76: #if BYTE_ORDER == BIG_ENDIAN
77: u_int th_off:4, /* data offset */
78: th_x2:4; /* (unused) */
79: #endif
80: u_char th_flags;
81: #define TH_FIN 0x01
82: #define TH_SYN 0x02
83: #define TH_RST 0x04
84: #define TH_PUSH 0x08
85: #define TH_ACK 0x10
86: #define TH_URG 0x20
87: #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG)
88:
89: u_short th_win; /* window */
90: u_short th_sum; /* checksum */
91: u_short th_urp; /* urgent pointer */
92: };
93:
94: #define TCPOPT_EOL 0
95: #define TCPOPT_NOP 1
96: #define TCPOPT_MAXSEG 2
97: #define TCPOLEN_MAXSEG 4
98: #define TCPOPT_WINDOW 3
99: #define TCPOLEN_WINDOW 3
100: #define TCPOPT_SACK_PERMITTED 4 /* Experimental */
101: #define TCPOLEN_SACK_PERMITTED 2
102: #define TCPOPT_SACK 5 /* Experimental */
103: #define TCPOPT_TIMESTAMP 8
104: #define TCPOLEN_TIMESTAMP 10
105: #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
106: #define TCPOPT_TSTAMP_HDR \
107: (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
108:
109: #define TCPOPT_CC 11 /* CC options: RFC-1644 */
110: #define TCPOPT_CCNEW 12
111: #define TCPOPT_CCECHO 13
112: #define TCPOLEN_CC 6
113: #define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
114: #define TCPOPT_CC_HDR(ccopt) \
115: (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
116:
117: /*
118: * Default maximum segment size for TCP.
119: * With an IP MSS of 576, this is 536,
120: * but 512 is probably more convenient.
121: * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
122: */
123: #define TCP_MSS 512
124:
125: #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
126: #define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
127:
128: #define TCP_MAX_WINSHIFT 14 /* maximum window shift */
129:
130: #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
131: #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
132: /* max space left for options */
133:
134: /*
135: * User-settable options (used with setsockopt).
136: */
137: #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
138: #define TCP_MAXSEG 0x02 /* set maximum segment size */
139: #define TCP_NOPUSH 0x04 /* don't push last block of write */
140: #define TCP_NOOPT 0x08 /* don't use TCP options */
141:
142: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.