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658d6a25 KS |
1 | /* |
2 | * Copyright (c) University of British Columbia, 1984 | |
3 | * Copyright (c) 1990 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * the Laboratory for Computation Vision and the Computer Science Department | |
8 | * of the University of British Columbia. | |
9 | * | |
10 | * %sccs.include.redist.c% | |
11 | * | |
b650f46e | 12 | * @(#)pk.h 7.4 (Berkeley) %G% |
658d6a25 | 13 | */ |
5b7aaaef KS |
14 | |
15 | /* | |
16 | * | |
17 | * X.25 Packet Level Definitions: | |
18 | * | |
19 | */ | |
20 | ||
21 | /* Packet type identifier field defintions. */ | |
22 | ||
23 | #define X25_CALL 11 | |
24 | #define X25_CALL_ACCEPTED 15 | |
25 | #define X25_CLEAR 19 | |
26 | #define X25_CLEAR_CONFIRM 23 | |
27 | #define X25_DATA 0 | |
28 | #define X25_INTERRUPT 35 | |
29 | #define X25_INTERRUPT_CONFIRM 39 | |
30 | ||
31 | #define X25_RR 1 | |
32 | #define X25_RNR 5 | |
33 | #define X25_RESET 27 | |
34 | #define X25_RESET_CONFIRM 31 | |
35 | ||
36 | #define X25_RESTART 251 | |
37 | #define X25_RESTART_CONFIRM 255 | |
38 | ||
39 | /* Restart cause field definitions. */ | |
40 | ||
41 | #define X25_RESTART_LOCAL_PROCEDURE_ERROR 1 | |
42 | #define X25_RESTART_NETWORK_CONGESTION 3 | |
43 | #define X25_RESTART_NETWORK_OPERATIONAL 7 | |
44 | ||
45 | /* Miscellaneous definitions. */ | |
46 | ||
47 | #define DATA_PACKET_DESIGNATOR 0x01 | |
48 | #define RR_OR_RNR_PACKET_DESIGNATOR 0x02 | |
49 | #define RR_PACKET_DESIGNATOR 0x04 | |
50 | ||
51 | #define DEFAULT_WINDOW_SIZE 2 | |
52 | #define MODULUS 8 | |
53 | ||
54 | #define ADDRLN 1 | |
55 | #define MAXADDRLN 15 | |
56 | #define FACILITIESLN 1 | |
57 | #define MAXFACILITIESLN 10 | |
58 | #define MAXUSERDATA 16 | |
59 | #define MAXCALLINFOLN 1+15+1+10+16 | |
60 | ||
61 | #define PACKET_OK 0 | |
62 | #define IGNORE_PACKET 1 | |
63 | #define ERROR_PACKET 2 | |
64 | ||
65 | typedef char bool; | |
66 | #define FALSE 0 | |
67 | #define TRUE 1 | |
68 | ||
69 | /* | |
70 | * X.25 Packet format definitions | |
658d6a25 KS |
71 | * This will eventually have to be rewritten without reference |
72 | * to bit fields, to be ansi C compliant and allignment safe. | |
5b7aaaef KS |
73 | */ |
74 | ||
658d6a25 KS |
75 | #if BYTE_ORDER == BIG_ENDIAN |
76 | #define ORDER2(a, b) a , b | |
658d6a25 KS |
77 | #define ORDER4(a, b, c, d) a , b , c , d |
78 | #endif | |
5b7aaaef | 79 | |
658d6a25 KS |
80 | #if BYTE_ORDER == LITTLE_ENDIAN |
81 | #define ORDER2(a, b) b , a | |
658d6a25 | 82 | #define ORDER4(a, b, c, d) d , c , b , a |
5b7aaaef | 83 | #endif |
5b7aaaef | 84 | |
658d6a25 | 85 | typedef u_char octet; |
5b7aaaef | 86 | |
658d6a25 | 87 | struct x25_calladdr { |
b650f46e | 88 | octet ORDER2(calling_addrlen:4, called_addrlen:4); |
658d6a25 | 89 | octet address_field[MAXADDRLN]; |
4507dea2 | 90 | }; |
5b7aaaef KS |
91 | |
92 | struct x25_packet { | |
b650f46e | 93 | octet ORDER4(q_bit:1, d_bit:1, fmt_identifier:2, lc_group_number:4); |
5b7aaaef KS |
94 | octet logical_channel_number; |
95 | octet packet_type; | |
96 | octet packet_data; | |
97 | }; | |
98 | ||
99 | struct data_packet { | |
b650f46e | 100 | octet ORDER4(pr:3, m_bit:1, ps:3, z:1); |
5b7aaaef KS |
101 | }; |
102 | ||
658d6a25 KS |
103 | #define FACILITIES_REVERSE_CHARGE 0x1 |
104 | #define FACILITIES_THROUGHPUT 0x2 | |
105 | #define FACILITIES_PACKETSIZE 0x42 | |
106 | #define FACILITIES_WINDOWSIZE 0x43 | |
107 | ||
108 | #define PKHEADERLN 3 | |
109 | ||
110 | ||
5b7aaaef KS |
111 | #define PR(xp) (((struct data_packet *)&xp -> packet_type)->pr) |
112 | #define PS(xp) (((struct data_packet *)&xp -> packet_type)->ps) | |
113 | #define MBIT(xp) (((struct data_packet *)&xp -> packet_type)->m_bit) | |
114 | ||
115 | struct x25_packet *pk_template (); | |
116 | ||
117 | /* Define X.25 packet level states. */ | |
118 | ||
119 | /* Call setup and clearing substates. */ | |
120 | ||
121 | #define LISTEN 0 | |
122 | #define READY 1 | |
123 | #define RECEIVED_CALL 2 | |
124 | #define SENT_CALL 3 | |
125 | #define DATA_TRANSFER 4 | |
126 | #define RECEIVED_CLEAR 5 | |
127 | #define SENT_CLEAR 6 | |
128 | ||
129 | /* DTE states. */ | |
130 | ||
131 | #define DTE_WAITING 7 | |
132 | #define DTE_RECEIVED_RESTART 8 | |
133 | #define DTE_SENT_RESTART 9 | |
134 | #define DTE_READY 0 | |
135 | ||
136 | #define MAXSTATES 10 | |
137 | ||
138 | /* | |
139 | * The following definitions are used in a switch statement after | |
140 | * determining the packet type. These values are returned by the | |
141 | * pk_decode procedure. | |
142 | */ | |
143 | ||
144 | #define CALL 0 * MAXSTATES | |
145 | #define CALL_ACCEPTED 1 * MAXSTATES | |
146 | #define CLEAR 2 * MAXSTATES | |
147 | #define CLEAR_CONF 3 * MAXSTATES | |
148 | #define DATA 4 * MAXSTATES | |
149 | #define INTERRUPT 5 * MAXSTATES | |
150 | #define INTERRUPT_CONF 6 * MAXSTATES | |
151 | #define RR 7 * MAXSTATES | |
152 | #define RNR 8 * MAXSTATES | |
153 | #define RESET 9 * MAXSTATES | |
154 | #define RESET_CONF 10 * MAXSTATES | |
155 | #define RESTART 11 * MAXSTATES | |
156 | #define RESTART_CONF 12 * MAXSTATES | |
157 | #define INVALID_PACKET 13 * MAXSTATES | |
158 | #define DELETE_PACKET INVALID_PACKET |