1/* $KAME: dccp.h,v 1.10 2005/10/26 18:46:33 nishida Exp $ */
2/* $NetBSD: dccp.h,v 1.1 2015/02/10 19:11:52 rjs Exp $ */
3
4/*
5 * Copyright (c) 2003 Joacim H�ggmark, Magnus Erixzon, Nils-Erik Mattsson
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Id: dccp.h,v 1.13 2003/07/31 11:14:41 joahag-9 Exp
32 */
33
34#ifndef _NETINET_DCCP_H_
35#define _NETINET_DCCP_H_
36
37/*
38 * DCCP protocol header
39 * draft-ietf-dccp-spec-01.txt
40 */
41struct dccphdr {
42 u_short dh_sport; /* source port */
43 u_short dh_dport; /* destination port */
44
45 u_int8_t dh_off; /* Data offset */
46#if BYTE_ORDER == LITTLE_ENDIAN
47 u_int8_t dh_cscov:4, /* Checksum Length */
48 dh_ccval:4; /* Number of non data packets */
49#else
50 u_int8_t dh_ccval:4,
51 dh_cscov:4;
52#endif
53 u_short dh_sum; /* Checksum */
54
55#if BYTE_ORDER == LITTLE_ENDIAN
56 u_int32_t dh_x:1, /* long/short sequence number */
57 dh_type:4,
58 dh_res:3,
59 dh_seq:24; /* Sequence number */
60#else
61 u_int32_t dh_res:3, /* Reserved */
62 dh_type:4, /* Type of message */
63 dh_x:1, /* long/short sequence number */
64 dh_seq:24;
65#endif
66};
67
68struct dccplhdr {
69 u_short dh_sport; /* source port */
70 u_short dh_dport; /* destination port */
71
72 u_int8_t dh_off; /* Data offset */
73#if BYTE_ORDER == LITTLE_ENDIAN
74 u_int8_t dh_cscov:4, /* Checksum Length */
75 dh_ccval:4; /* Number of non data packets */
76#else
77 u_int8_t dh_ccval:4,
78 dh_cscov:4;
79#endif
80 u_short dh_sum; /* Checksum */
81
82#if BYTE_ORDER == LITTLE_ENDIAN
83 u_int8_t dh_x:1, /* long/short sequence number */
84 dh_type:4,
85 dh_res:3;
86#else
87 u_int8_t dh_res:3, /* Reserved */
88 dh_type:4, /* Type of message */
89 dh_x:1; /* long/short sequence number */
90#endif
91 u_int8_t dh_res2;
92 u_int16_t dh_seq;
93 u_int32_t dh_seq2; /* long sequence number */
94};
95
96struct dccp_nathdr {
97 u_int16_t dh_sport; /* source port */
98 u_int16_t dh_dport; /* destination port */
99 u_int8_t dh_off;
100#if BYTE_ORDER == LITTLE_ENDIAN
101 u_int8_t dh_cscov:4, /* Checksum Length */
102 dh_ccval:4; /* Number of non data packets */
103#else
104 u_int8_t dh_ccval:4,
105 dh_cscov:4;
106#endif
107
108 u_int16_t dh_seq;
109 u_int32_t dh_seq2;
110};
111
112
113struct dccp_requesthdr {
114 u_int32_t drqh_scode; /* Service Code */
115};
116
117struct dccp_acksubhdr {
118#if BYTE_ORDER == LITTLE_ENDIAN
119 u_int32_t dah_res:8, /* Reserved */
120 dah_ack:24; /* Acknowledgement number */
121#else
122 u_int32_t dah_ack:24,
123 dah_res:8;
124#endif
125};
126
127struct dccp_acksublhdr {
128 u_int16_t dah_res; /* Reserved */
129 u_int16_t dah_ack; /* Acknowledgement number */
130 u_int32_t dah_ack2;
131};
132
133struct dccp_ackhdr {
134 struct dccp_acksubhdr dash;
135};
136
137struct dccp_acklhdr {
138 struct dccp_acksublhdr dash;
139};
140
141struct dccp_resethdr {
142 struct dccp_acksublhdr drth_dash;
143 u_int8_t drth_reason; /* Reason */
144 u_int8_t drth_data1; /* Data 1 */
145 u_int8_t drth_data2; /* Data 2 */
146 u_int8_t drth_data3; /* Data 3 */
147};
148
149#define DCCP_TYPE_REQUEST 0
150#define DCCP_TYPE_RESPONSE 1
151#define DCCP_TYPE_DATA 2
152#define DCCP_TYPE_ACK 3
153#define DCCP_TYPE_DATAACK 4
154#define DCCP_TYPE_CLOSEREQ 5
155#define DCCP_TYPE_CLOSE 6
156#define DCCP_TYPE_RESET 7
157#define DCCP_TYPE_MOVE 8
158
159#define DCCP_FEATURE_CC 1
160#define DCCP_FEATURE_ECN 2
161#define DCCP_FEATURE_ACKRATIO 3
162#define DCCP_FEATURE_ACKVECTOR 4
163#define DCCP_FEATURE_MOBILITY 5
164#define DCCP_FEATURE_LOSSWINDOW 6
165#define DCCP_FEATURE_CONN_NONCE 8
166#define DCCP_FEATURE_IDENTREG 7
167
168#define DCCP_OPT_PADDING 0
169#define DCCP_OPT_DATA_DISCARD 1
170#define DCCP_OPT_SLOW_RECV 2
171#define DCCP_OPT_BUF_CLOSED 3
172#define DCCP_OPT_CHANGE_L 32
173#define DCCP_OPT_CONFIRM_L 33
174#define DCCP_OPT_CHANGE_R 34
175#define DCCP_OPT_CONFIRM_R 35
176#define DCCP_OPT_INIT_COOKIE 36
177#define DCCP_OPT_NDP_COUNT 37
178#define DCCP_OPT_ACK_VECTOR0 38
179#define DCCP_OPT_ACK_VECTOR1 39
180#define DCCP_OPT_RECV_BUF_DROPS 40
181#define DCCP_OPT_TIMESTAMP 41
182#define DCCP_OPT_TIMESTAMP_ECHO 42
183#define DCCP_OPT_ELAPSEDTIME 43
184#define DCCP_OPT_DATACHECKSUM 44
185
186#define DCCP_REASON_UNSPEC 0
187#define DCCP_REASON_CLOSED 1
188#define DCCP_REASON_INVALID 2
189#define DCCP_REASON_OPTION_ERR 3
190#define DCCP_REASON_FEA_ERR 4
191#define DCCP_REASON_CONN_REF 5
192#define DCCP_REASON_BAD_SNAME 6
193#define DCCP_REASON_BAD_COOKIE 7
194#define DCCP_REASON_INV_MOVE 8
195#define DCCP_REASON_UNANSW_CH 10
196#define DCCP_REASON_FRUITLESS_NEG 11
197
198#define DCCP_CCID 0x01
199#define DCCP_CSLEN 0x02
200#define DCCP_MAXSEG 0x04
201#define DCCP_SERVICE 0x08
202
203#define DCCP_NDP_LIMIT 16
204#define DCCP_SEQ_NUM_LIMIT 16777216
205#define DCCP_MAX_OPTIONS 32
206#define DCCP_CONNECT_TIMER (75 * hz)
207#define DCCP_CLOSE_TIMER (75 * hz)
208#define DCCP_TIMEWAIT_TIMER (60 * hz)
209#define DCCP_MAX_PKTS 100
210#endif