1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2012 David Hoeppner. All rights reserved.
14 */
15
16 #ifndef _INET_DCCP_H
17 #define _INET_DCCP_H
18
19 #include <sys/inttypes.h>
20 #include <sys/socket.h>
21 #include <sys/socket_proto.h>
22
23 #include <netinet/in.h>
24 #include <netinet/ip6.h>
25 #include <netinet/dccp.h>
26
27 #include <inet/common.h>
28 #include <inet/dccp_stack.h>
29 #include <inet/ip.h>
30 #include <inet/ip6.h>
31 #include <inet/optcom.h>
32 #include <inet/tunables.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 /*
39 * DCCP states
40 */
41 #define DCCPS_CLOSED 1
42 #define DCCPS_BOUND 2
43 #define DCCPS_REQUEST 3
44 #define DCCPS_LISTEN 4
45 #define DCCPS_PARTOPEN 5
46 #define DCCPS_RESPOND 6
47 #define DCCPS_OPEN 7
48 #define DCCPS_CLOSING 8
49 #define DCCPS_CLOSEREQ 9
50 #define DCCPS_TIMEWAIT 10
51
52 /*
53 * DCCP header structures.
54 */
55
56 /* Generic protocol header (RFC 4340, Section 5.1.) */
57 typedef struct dccphdr_s {
58 uint8_t dh_lport[2];
59 uint8_t dh_fport[2];
60 uint8_t dh_offset;
61 uint8_t dh_ccval:4,
62 dh_cscov:4;
63 uint8_t db_sum[2];
64 uint8_t dh_reserved:3,
65 dh_type:4,
66 dh_x:1;
67 uint8_t dh_res_seq;
68 uint8_t dh_seq[2];
69 } dccph_t;
70
71 #define DCCP_HDR_LENGTH(dccph) \
72 (((dccph_t *)dccph)->dh_offset * 4) /* XXX >> 2 */
73 #define DCCP_MAX_HDR_LENGTH 1020
74 #define DCCP_MIN_HEADER_LENGTH 12
75
76 /* Generic protocol header aligned (RFC 4340, Section 5.1.) */
77 typedef struct dccphdra_s {
78 in_port_t dha_lport; /* Source port */
79 in_port_t dha_fport; /* Destination port */
80 uint8_t dha_offset; /* Data offset */
81 uint8_t dha_ccval:4, /* */
82 dha_cscov:4; /* */
83 uint16_t dha_sum; /* Checksum */
84 uint8_t dha_x:1, /* Reserved */
85 dha_type:4, /* Packet type */
86 dha_reserved:3; /* Header type */
87 uint8_t dha_res_seq;
88 uint16_t dha_seq; /* Partial sequence number */
89 } dccpha_t;
90
91 typedef struct dccphdra_ext_s {
92 uint32_t dha_ext_seq;
93 } dccpha_ext_t;
94
95 /* Acknowledgement number */
96 typedef struct dccphdra_ack {
97 uint16_t dha_ack_reserved;
98 uint16_t dha_ack_high;
99 uint32_t dha_ack_low;
100 } dccpha_ack_t;
101
102 /* Service number */
103 typedef struct dccphdra_srv {
104 uint32_t dha_srv_code;
105 } dccpha_srv_t;
106
107 /* Reset data */
108 typedef struct dccphdra_reset {
109 uint8_t dha_reset_code;
110 uint8_t dha_reset_data[3];
111 } dccpha_reset_t;
112
113 /*
114 * Control structure for each open TCP stream,
115 * defined only within the kernel or for a kmem user.
116 * NOTE: tcp_reinit_values MUST have a line for each field in this structure!
117 */
118 #if (defined(_KERNEL) || defined(_KMEMUSER))
119
120 /* Internal DCCP structure */
121 typedef struct dccp_s {
122
123 conn_t *dccp_connp; /* Backpointer to conn_t */
124 dccp_stack_t *dccp_dccps; /* Backpointer to dccp_stack_t */
125
126 int32_t dccp_state;
127
128 uint64_t dccp_last_rcv_lbolt;
129
130 uint32_t dccp_ibsegs; /* Inbound segments on this stream */
131 uint32_t dccp_obsegs; /* Outbound segments on this stream */
132
133 uint32_t
134 dccp_loopback: 1, /* Src and dst are the same machine */
135 dccp_localnet: 1, /* Src and dst are on the same subnet */
136 dccp_active_open: 1, /* This is a active open */
137 dccp_detached : 1, /* If we're detached from a stream */
138 dccp_dummy: 1;
139
140 uint32_t
141 dccp_allow_short_seqnos: 1,
142 dccp_ecn_incapable: 1;
143 /*
144 * Timers and timestamps.
145 */
146 mblk_t *dccp_timercache; /* Timer cache */
147 timeout_id_t dccp_timer_tid; /* Timer service id */
148
149 clock_t dccp_timestamp_init; /* Time reference */
150 int32_t dccp_timestamp_echo; /* Timestamp found in options */
151 clock_t dccp_timestamp;
152
153 /*
154 * Bind related.
155 */
156 struct dccp_s *dccp_bind_hash; /* Bind hash chain */
157 struct dccp_s *dccp_bind_hash_port; /* Bound to the same port */
158 struct dccp_s **dccp_ptpbhn;
159
160 struct dccphdra_s *dccp_dccpha; /* Template header */
161
162 mblk_t *dccp_xmit_head;
163
164 /*
165 * Pointers into the header template.
166 */
167 ipha_t *dccp_ipha;
168 ip6_t *dccp_ip6h;
169
170 t_uscalar_t dccp_acceptor_id; /* ACCEPTOR_id */
171
172 sock_connid_t dccp_connid;
173
174 /* Incrementing pending conn req ID */
175 t_scalar_t dccp_conn_req_seqnum;
176
177 boolean_t dccp_issocket; /* This is a socket dccp */
178
179 /* List of features being negotiated */
180 list_t dccp_features;
181
182 struct dccp_s *dccp_listener; /* Our listener */
183 struct dccp_s *dccp_saved_listener; /* Saved listener */
184
185 /*
186 * Sequence numbers (Section 7.1.)
187 */
188 uint64_t dccp_swl; /* Sequence number window low */
189 uint64_t dccp_swh; /* Sequence number window high */
190 uint64_t dccp_awl; /* Ack number window low */
191 uint64_t dccp_awh; /* Ack number window high */
192 uint64_t dccp_iss; /* Initial sequence number sent */
193 uint64_t dccp_isr; /* Initial sequence number received */
194 uint64_t dccp_osr; /* First OPEN sequence number */
195 uint64_t dccp_gss; /* Greatest sequence number sent */
196 uint64_t dccp_gsr; /* Greatest sequence */
197 /* number received */
198 uint64_t dccp_gar; /* Greatest acknowledgement */
199 /* number received */
200
201 uint8_t dccp_reset_code;
202 uint8_t dccp_reset_data[3];
203 } dccp_t;
204
205 typedef struct dccp_df_s {
206 struct dccp_s *df_dccp;
207 kmutex_t df_lock;
208 uchar_t df_pad[TF_CACHEL_PAD - (sizeof (dccp_t *) +
209 sizeof (kmutex_t))];
210 } dccp_df_t;
211
212 #endif /* _KERNEL */
213
214 #ifdef __cplusplus
215 }
216 #endif
217
218 #endif /* _INET_DCCP_H */