summaryrefslogtreecommitdiff
path: root/tcp.h
blob: d9ffd0df28581fa41bd9dd40ffc8bb2fc3fcd004 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/*
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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
 */

typedef	uint32_t	tcp_seq;
/*
 * TCP header.
 * Per RFC 793, September, 1981.
 */
struct tcphdr {
	uint16_t	th_sport;		/* source port */
	uint16_t	th_dport;		/* destination port */
	tcp_seq		th_seq;			/* sequence number */
	tcp_seq		th_ack;			/* acknowledgement number */
	uint8_t		th_offx2;		/* data offset, rsvd */
	uint8_t		th_flags;
	uint16_t	th_win;			/* window */
	uint16_t	th_sum;			/* checksum */
	uint16_t	th_urp;			/* urgent pointer */
} UNALIGNED;

#define TH_OFF(th)	(((th)->th_offx2 & 0xf0) >> 4)

/* TCP 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
#define TH_ECNECHO 0x40	/* ECN Echo */
#define TH_CWR	   0x80	/* ECN Cwnd Reduced */


#define	TCPOPT_EOL		0
#define	TCPOPT_NOP		1
#define	TCPOPT_MAXSEG		2
#define    TCPOLEN_MAXSEG		4
#define	TCPOPT_WSCALE		3	/* window scale factor (rfc1323) */
#define	TCPOPT_SACKOK		4	/* selective ack ok (rfc2018) */
#define	TCPOPT_SACK		5	/* selective ack (rfc2018) */
#define	TCPOPT_ECHO		6	/* echo (rfc1072) */
#define	TCPOPT_ECHOREPLY	7	/* echo (rfc1072) */
#define TCPOPT_TIMESTAMP	8	/* timestamp (rfc1323) */
#define    TCPOLEN_TIMESTAMP		10
#define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */
#define TCPOPT_CC		11	/* T/TCP CC options (rfc1644) */
#define TCPOPT_CCNEW		12	/* T/TCP CC options (rfc1644) */
#define TCPOPT_CCECHO		13	/* T/TCP CC options (rfc1644) */
#define TCPOPT_SIGNATURE	19	/* Keyed MD5 (rfc2385) */
#define    TCPOLEN_SIGNATURE		18
#define TCP_SIGLEN 16			/* length of an option 19 digest */
#define TCPOPT_SCPS		20	/* SCPS-TP (CCSDS 714.0-B-2) */
#define	TCPOPT_UTO		28	/* tcp user timeout (rfc5482) */
#define	   TCPOLEN_UTO			4
#define TCPOPT_TCPAO		29	/* TCP authentication option (rfc5925) */
#define	TCPOPT_MPTCP		30	/* MPTCP options */
#define TCPOPT_FASTOPEN		34	/* TCP Fast Open (rfc7413) */
#define TCPOPT_EXPERIMENT2	254	/* experimental headers (rfc4727) */

#define TCPOPT_TSTAMP_HDR	\
    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)

#ifndef FTP_PORT
#define FTP_PORT		21
#endif
#ifndef SSH_PORT
#define SSH_PORT		22
#endif
#ifndef TELNET_PORT
#define TELNET_PORT		23
#endif
#ifndef SMTP_PORT
#define SMTP_PORT		25
#endif
#ifndef WHOIS_PORT
#define WHOIS_PORT		43
#endif
#ifndef NAMESERVER_PORT
#define NAMESERVER_PORT		53
#endif
#ifndef HTTP_PORT
#define HTTP_PORT		80
#endif
#ifndef NETBIOS_NS_PORT
#define NETBIOS_NS_PORT		137	/* RFC 1001, RFC 1002 */
#endif
#ifndef NETBIOS_SSN_PORT
#define NETBIOS_SSN_PORT	139	/* RFC 1001, RFC 1002 */
#endif
#ifndef BGP_PORT
#define BGP_PORT		179
#endif
#ifndef RPKI_RTR_PORT
#define RPKI_RTR_PORT		323
#endif
#ifndef SMB_PORT
#define SMB_PORT		445
#endif
#ifndef RTSP_PORT
#define RTSP_PORT		554
#endif
#ifndef MSDP_PORT
#define MSDP_PORT		639
#endif
#ifndef LDP_PORT
#define LDP_PORT		646
#endif
#ifndef PPTP_PORT
#define PPTP_PORT		1723
#endif
#ifndef NFS_PORT
#define NFS_PORT		2049
#endif
#ifndef OPENFLOW_PORT_OLD
#define OPENFLOW_PORT_OLD	6633
#endif
#ifndef OPENFLOW_PORT_IANA
#define OPENFLOW_PORT_IANA	6653
#endif
#ifndef HTTP_PORT_ALT
#define HTTP_PORT_ALT		8080
#endif
#ifndef RTSP_PORT_ALT
#define RTSP_PORT_ALT		8554
#endif
#ifndef BEEP_PORT
#define BEEP_PORT		10288
#endif
#ifndef REDIS_PORT
#define REDIS_PORT		6379
#endif