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 * 12 * @(#)pk.h 7.6 (Berkeley) 01/09/91 13 */ 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 71 * This will eventually have to be rewritten without reference 72 * to bit fields, to be ansi C compliant and allignment safe. 73 */ 74 75 #if BYTE_ORDER == BIG_ENDIAN 76 #define ORDER2(a, b) a , b 77 #define ORDER4(a, b, c, d) a , b , c , d 78 #endif 79 80 #if BYTE_ORDER == LITTLE_ENDIAN 81 #define ORDER2(a, b) b , a 82 #define ORDER4(a, b, c, d) d , c , b , a 83 #endif 84 85 typedef u_char octet; 86 87 struct x25_calladdr { 88 octet ORDER2(calling_addrlen:4, called_addrlen:4); 89 octet address_field[MAXADDRLN]; 90 }; 91 92 struct x25_packet { 93 octet ORDER4(q_bit:1, d_bit:1, fmt_identifier:2, lc_group_number:4); 94 octet logical_channel_number; 95 octet packet_type; 96 octet packet_data; 97 }; 98 99 struct data_packet { 100 octet ORDER4(pr:3, m_bit:1, ps:3, z:1); 101 }; 102 103 #define FACILITIES_REVERSE_CHARGE 0x1 104 #define FACILITIES_THROUGHPUT 0x2 105 #define FACILITIES_PACKETSIZE 0x42 106 #define FACILITIES_WINDOWSIZE 0x43 107 108 #define PKHEADERLN 3 109 110 111 #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 #define LCN(xp) (xp -> logical_channel_number + \ 115 (xp -> lc_group_number ? (xp -> lc_group_number >> 8) : 0)) 116 #define SET_LCN(xp, lcn) ((xp -> logical_channel_number = lcn), \ 117 (xp -> lc_group_number = lcn > 255 ? lcn >> 8 : 0)) 118 119 struct mbuf *pk_template (); 120 121 /* Define X.25 packet level states. */ 122 123 /* Call setup and clearing substates. */ 124 125 #define LISTEN 0 126 #define READY 1 127 #define RECEIVED_CALL 2 128 #define SENT_CALL 3 129 #define DATA_TRANSFER 4 130 #define RECEIVED_CLEAR 5 131 #define SENT_CLEAR 6 132 133 /* DTE states. */ 134 135 #define DTE_WAITING 7 136 #define DTE_RECEIVED_RESTART 8 137 #define DTE_SENT_RESTART 9 138 #define DTE_READY 0 139 140 #define MAXSTATES 10 141 142 /* 143 * The following definitions are used in a switch statement after 144 * determining the packet type. These values are returned by the 145 * pk_decode procedure. 146 */ 147 148 #define CALL 0 * MAXSTATES 149 #define CALL_ACCEPTED 1 * MAXSTATES 150 #define CLEAR 2 * MAXSTATES 151 #define CLEAR_CONF 3 * MAXSTATES 152 #define DATA 4 * MAXSTATES 153 #define INTERRUPT 5 * MAXSTATES 154 #define INTERRUPT_CONF 6 * MAXSTATES 155 #define RR 7 * MAXSTATES 156 #define RNR 8 * MAXSTATES 157 #define RESET 9 * MAXSTATES 158 #define RESET_CONF 10 * MAXSTATES 159 #define RESTART 11 * MAXSTATES 160 #define RESTART_CONF 12 * MAXSTATES 161 #define INVALID_PACKET 13 * MAXSTATES 162 #define DELETE_PACKET INVALID_PACKET 163