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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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  *	@(#)tcp.h	8.1 (Berkeley) 6/10/93
34  */
35 
36 typedef	uint32_t	tcp_seq;
37 /*
38  * TCP header.
39  * Per RFC 793, September, 1981.
40  */
41 struct tcphdr {
42 	uint16_t	th_sport;		/* source port */
43 	uint16_t	th_dport;		/* destination port */
44 	tcp_seq		th_seq;			/* sequence number */
45 	tcp_seq		th_ack;			/* acknowledgement number */
46 	uint8_t		th_offx2;		/* data offset, rsvd */
47 	uint8_t		th_flags;
48 	uint16_t	th_win;			/* window */
49 	uint16_t	th_sum;			/* checksum */
50 	uint16_t	th_urp;			/* urgent pointer */
51 } UNALIGNED;
52 
53 #define TH_OFF(th)	(((th)->th_offx2 & 0xf0) >> 4)
54 
55 /* TCP flags */
56 #define	TH_FIN     0x01
57 #define	TH_SYN	   0x02
58 #define	TH_RST	   0x04
59 #define	TH_PUSH	   0x08
60 #define	TH_ACK	   0x10
61 #define	TH_URG	   0x20
62 #define TH_ECNECHO 0x40	/* ECN Echo */
63 #define TH_CWR	   0x80	/* ECN Cwnd Reduced */
64 
65 
66 #define	TCPOPT_EOL		0
67 #define	TCPOPT_NOP		1
68 #define	TCPOPT_MAXSEG		2
69 #define    TCPOLEN_MAXSEG		4
70 #define	TCPOPT_WSCALE		3	/* window scale factor (rfc1323) */
71 #define	TCPOPT_SACKOK		4	/* selective ack ok (rfc2018) */
72 #define	TCPOPT_SACK		5	/* selective ack (rfc2018) */
73 #define	TCPOPT_ECHO		6	/* echo (rfc1072) */
74 #define	TCPOPT_ECHOREPLY	7	/* echo (rfc1072) */
75 #define TCPOPT_TIMESTAMP	8	/* timestamp (rfc1323) */
76 #define    TCPOLEN_TIMESTAMP		10
77 #define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */
78 #define TCPOPT_CC		11	/* T/TCP CC options (rfc1644) */
79 #define TCPOPT_CCNEW		12	/* T/TCP CC options (rfc1644) */
80 #define TCPOPT_CCECHO		13	/* T/TCP CC options (rfc1644) */
81 #define TCPOPT_SIGNATURE	19	/* Keyed MD5 (rfc2385) */
82 #define    TCPOLEN_SIGNATURE		18
83 #define TCP_SIGLEN 16			/* length of an option 19 digest */
84 #define TCPOPT_SCPS		20	/* SCPS-TP (CCSDS 714.0-B-2) */
85 #define	TCPOPT_UTO		28	/* tcp user timeout (rfc5482) */
86 #define	   TCPOLEN_UTO			4
87 #define TCPOPT_TCPAO		29	/* TCP authentication option (rfc5925) */
88 #define	TCPOPT_MPTCP		30	/* MPTCP options */
89 #define TCPOPT_FASTOPEN		34	/* TCP Fast Open (rfc7413) */
90 #define TCPOPT_EXPERIMENT2	254	/* experimental headers (rfc4727) */
91 
92 #define TCPOPT_TSTAMP_HDR	\
93     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
94 
95 #ifndef FTP_PORT
96 #define FTP_PORT		21
97 #endif
98 #ifndef SSH_PORT
99 #define SSH_PORT		22
100 #endif
101 #ifndef TELNET_PORT
102 #define TELNET_PORT		23
103 #endif
104 #ifndef SMTP_PORT
105 #define SMTP_PORT		25
106 #endif
107 #ifndef NAMESERVER_PORT
108 #define NAMESERVER_PORT		53
109 #endif
110 #ifndef HTTP_PORT
111 #define HTTP_PORT		80
112 #endif
113 #ifndef NETBIOS_NS_PORT
114 #define NETBIOS_NS_PORT		137	/* RFC 1001, RFC 1002 */
115 #endif
116 #ifndef NETBIOS_SSN_PORT
117 #define NETBIOS_SSN_PORT	139	/* RFC 1001, RFC 1002 */
118 #endif
119 #ifndef BGP_PORT
120 #define BGP_PORT		179
121 #endif
122 #ifndef RPKI_RTR_PORT
123 #define RPKI_RTR_PORT		323
124 #endif
125 #ifndef SMB_PORT
126 #define SMB_PORT		445
127 #endif
128 #ifndef RTSP_PORT
129 #define RTSP_PORT		554
130 #endif
131 #ifndef MSDP_PORT
132 #define MSDP_PORT		639
133 #endif
134 #ifndef LDP_PORT
135 #define LDP_PORT		646
136 #endif
137 #ifndef PPTP_PORT
138 #define PPTP_PORT		1723
139 #endif
140 #ifndef NFS_PORT
141 #define NFS_PORT		2049
142 #endif
143 #ifndef OPENFLOW_PORT_OLD
144 #define OPENFLOW_PORT_OLD	6633
145 #endif
146 #ifndef OPENFLOW_PORT_IANA
147 #define OPENFLOW_PORT_IANA	6653
148 #endif
149 #ifndef HTTP_PORT_ALT
150 #define HTTP_PORT_ALT		8080
151 #endif
152 #ifndef RTSP_PORT_ALT
153 #define RTSP_PORT_ALT		8554
154 #endif
155 #ifndef BEEP_PORT
156 #define BEEP_PORT		10288
157 #endif
158 #ifndef REDIS_PORT
159 #define REDIS_PORT		6379
160 #endif
161