1 | /* $NetBSD: if_llc.h,v 1.12 1999/11/19 20:41:19 thorpej Exp $ */ |
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2 | |
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3 | /* |
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4 | * Copyright (c) 1988, 1993 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. All advertising materials mentioning features or use of this software |
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16 | * must display the following acknowledgement: |
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17 | * This product includes software developed by the University of |
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18 | * California, Berkeley and its contributors. |
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19 | * 4. Neither the name of the University nor the names of its contributors |
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20 | * may be used to endorse or promote products derived from this software |
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21 | * without specific prior written permission. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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33 | * SUCH DAMAGE. |
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34 | * |
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35 | * @(#)if_llc.h 8.1 (Berkeley) 6/10/93 |
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36 | * $FreeBSD: src/sys/net/if_llc.h,v 1.8 2002/03/29 06:58:45 mdodd Exp $ |
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37 | */ |
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38 | |
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39 | #ifndef _NET_IF_LLC_H_ |
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40 | #define _NET_IF_LLC_H_ |
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41 | |
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42 | /* |
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43 | * IEEE 802.2 Link Level Control headers, for use in conjunction with |
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44 | * 802.{3,4,5} media access control methods. |
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45 | * |
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46 | * Headers here do not use bit fields due to shortcommings in many |
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47 | * compilers. |
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48 | */ |
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49 | |
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50 | struct llc { |
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51 | u_int8_t llc_dsap; |
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52 | u_int8_t llc_ssap; |
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53 | union { |
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54 | struct { |
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55 | u_int8_t control; |
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56 | u_int8_t format_id; |
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57 | u_int8_t class; |
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58 | u_int8_t window_x2; |
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59 | } type_u __attribute__((__packed__)); |
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60 | struct { |
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61 | u_int8_t num_snd_x2; |
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62 | u_int8_t num_rcv_x2; |
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63 | } type_i __attribute__((__packed__)); |
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64 | struct { |
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65 | u_int8_t control; |
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66 | u_int8_t num_rcv_x2; |
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67 | } type_s __attribute__((__packed__)); |
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68 | struct { |
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69 | u_int8_t control; |
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70 | /* |
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71 | * We cannot put the following fields in a structure because |
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72 | * the structure rounding might cause padding. |
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73 | */ |
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74 | u_int8_t frmr_rej_pdu0; |
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75 | u_int8_t frmr_rej_pdu1; |
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76 | u_int8_t frmr_control; |
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77 | u_int8_t frmr_control_ext; |
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78 | u_int8_t frmr_cause; |
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79 | } type_frmr __attribute__((__packed__)); |
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80 | struct { |
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81 | u_int8_t control; |
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82 | u_int8_t org_code[3]; |
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83 | u_int16_t ether_type; |
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84 | } type_snap __attribute__((__packed__)); |
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85 | struct { |
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86 | u_int8_t control; |
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87 | u_int8_t control_ext; |
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88 | } type_raw __attribute__((__packed__)); |
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89 | } llc_un /* XXX __attribute__((__packed__)) ??? */; |
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90 | } __attribute__((__packed__)); |
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91 | |
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92 | struct frmrinfo { |
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93 | u_int8_t frmr_rej_pdu0; |
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94 | u_int8_t frmr_rej_pdu1; |
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95 | u_int8_t frmr_control; |
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96 | u_int8_t frmr_control_ext; |
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97 | u_int8_t frmr_cause; |
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98 | } __attribute__((__packed__)); |
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99 | |
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100 | #define llc_control llc_un.type_u.control |
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101 | #define llc_control_ext llc_un.type_raw.control_ext |
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102 | #define llc_fid llc_un.type_u.format_id |
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103 | #define llc_class llc_un.type_u.class |
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104 | #define llc_window llc_un.type_u.window_x2 |
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105 | #define llc_frmrinfo llc_un.type_frmr.frmr_rej_pdu0 |
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106 | #define llc_frmr_pdu0 llc_un.type_frmr.frmr_rej_pdu0 |
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107 | #define llc_frmr_pdu1 llc_un.type_frmr.frmr_rej_pdu1 |
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108 | #define llc_frmr_control llc_un.type_frmr.frmr_control |
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109 | #define llc_frmr_control_ext llc_un.type_frmr.frmr_control_ext |
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110 | #define llc_frmr_cause llc_un.type_frmr.frmr_cause |
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111 | #define llc_snap llc_un.type_snap |
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112 | |
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113 | /* |
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114 | * Don't use sizeof(struct llc_un) for LLC header sizes |
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115 | */ |
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116 | #define LLC_ISFRAMELEN 4 |
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117 | #define LLC_UFRAMELEN 3 |
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118 | #define LLC_FRMRLEN 7 |
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119 | #define LLC_SNAPFRAMELEN 8 |
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120 | |
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121 | /* |
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122 | * Unnumbered LLC format commands |
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123 | */ |
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124 | #define LLC_UI 0x3 |
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125 | #define LLC_UI_P 0x13 |
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126 | #define LLC_DISC 0x43 |
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127 | #define LLC_DISC_P 0x53 |
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128 | #define LLC_UA 0x63 |
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129 | #define LLC_UA_P 0x73 |
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130 | #define LLC_TEST 0xe3 |
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131 | #define LLC_TEST_P 0xf3 |
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132 | #define LLC_FRMR 0x87 |
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133 | #define LLC_FRMR_P 0x97 |
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134 | #define LLC_DM 0x0f |
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135 | #define LLC_DM_P 0x1f |
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136 | #define LLC_XID 0xaf |
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137 | #define LLC_XID_P 0xbf |
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138 | #define LLC_SABME 0x6f |
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139 | #define LLC_SABME_P 0x7f |
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140 | |
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141 | /* |
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142 | * Supervisory LLC commands |
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143 | */ |
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144 | #define LLC_RR 0x01 |
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145 | #define LLC_RNR 0x05 |
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146 | #define LLC_REJ 0x09 |
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147 | |
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148 | /* |
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149 | * Info format - dummy only |
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150 | */ |
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151 | #define LLC_INFO 0x00 |
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152 | |
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153 | /* |
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154 | * ISO PDTR 10178 contains among others |
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155 | */ |
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156 | #define LLC_X25_LSAP 0x7e |
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157 | #define LLC_SNAP_LSAP 0xaa |
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158 | #define LLC_ISO_LSAP 0xfe |
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159 | |
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160 | #endif /* _NET_IF_LLC_H_ */ |
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