1 | /*
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2 | * ccp.h - Definitions for PPP Compression Control Protocol.
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3 | *
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4 | * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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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 | *
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13 | * 2. The name(s) of the authors of this software must not be used to
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14 | * endorse or promote products derived from this software without
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15 | * prior written permission.
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16 | *
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17 | * 3. Redistributions of any form whatsoever must retain the following
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18 | * acknowledgment:
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19 | * "This product includes software developed by Paul Mackerras
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20 | * <paulus@samba.org>".
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21 | *
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22 | * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
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23 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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24 | * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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25 | * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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26 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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27 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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28 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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29 | *
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30 | * $Id$
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31 | */
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32 |
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33 | #include "netif/ppp/ppp_opts.h"
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34 | #if PPP_SUPPORT && CCP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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35 |
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36 | #ifndef CCP_H
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37 | #define CCP_H
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38 |
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39 | #ifdef __cplusplus
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40 | extern "C" {
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41 | #endif
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42 |
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43 | /*
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44 | * CCP codes.
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45 | */
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46 |
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47 | #define CCP_CONFREQ 1
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48 | #define CCP_CONFACK 2
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49 | #define CCP_TERMREQ 5
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50 | #define CCP_TERMACK 6
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51 | #define CCP_RESETREQ 14
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52 | #define CCP_RESETACK 15
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53 |
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54 | /*
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55 | * Max # bytes for a CCP option
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56 | */
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57 |
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58 | #define CCP_MAX_OPTION_LENGTH 32
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59 |
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60 | /*
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61 | * Parts of a CCP packet.
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62 | */
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63 |
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64 | #define CCP_CODE(dp) ((dp)[0])
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65 | #define CCP_ID(dp) ((dp)[1])
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66 | #define CCP_LENGTH(dp) (((dp)[2] << 8) + (dp)[3])
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67 | #define CCP_HDRLEN 4
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68 |
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69 | #define CCP_OPT_CODE(dp) ((dp)[0])
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70 | #define CCP_OPT_LENGTH(dp) ((dp)[1])
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71 | #define CCP_OPT_MINLEN 2
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72 |
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73 | #if BSDCOMPRESS_SUPPORT
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74 | /*
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75 | * Definitions for BSD-Compress.
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76 | */
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77 |
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78 | #define CI_BSD_COMPRESS 21 /* config. option for BSD-Compress */
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79 | #define CILEN_BSD_COMPRESS 3 /* length of config. option */
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80 |
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81 | /* Macros for handling the 3rd byte of the BSD-Compress config option. */
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82 | #define BSD_NBITS(x) ((x) & 0x1F) /* number of bits requested */
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83 | #define BSD_VERSION(x) ((x) >> 5) /* version of option format */
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84 | #define BSD_CURRENT_VERSION 1 /* current version number */
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85 | #define BSD_MAKE_OPT(v, n) (((v) << 5) | (n))
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86 |
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87 | #define BSD_MIN_BITS 9 /* smallest code size supported */
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88 | #define BSD_MAX_BITS 15 /* largest code size supported */
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89 | #endif /* BSDCOMPRESS_SUPPORT */
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90 |
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91 | #if DEFLATE_SUPPORT
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92 | /*
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93 | * Definitions for Deflate.
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94 | */
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95 |
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96 | #define CI_DEFLATE 26 /* config option for Deflate */
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97 | #define CI_DEFLATE_DRAFT 24 /* value used in original draft RFC */
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98 | #define CILEN_DEFLATE 4 /* length of its config option */
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99 |
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100 | #define DEFLATE_MIN_SIZE 9
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101 | #define DEFLATE_MAX_SIZE 15
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102 | #define DEFLATE_METHOD_VAL 8
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103 | #define DEFLATE_SIZE(x) (((x) >> 4) + 8)
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104 | #define DEFLATE_METHOD(x) ((x) & 0x0F)
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105 | #define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 4) + DEFLATE_METHOD_VAL)
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106 | #define DEFLATE_CHK_SEQUENCE 0
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107 | #endif /* DEFLATE_SUPPORT */
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108 |
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109 | #if MPPE_SUPPORT
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110 | /*
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111 | * Definitions for MPPE.
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112 | */
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113 |
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114 | #define CI_MPPE 18 /* config option for MPPE */
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115 | #define CILEN_MPPE 6 /* length of config option */
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116 | #endif /* MPPE_SUPPORT */
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117 |
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118 | #if PREDICTOR_SUPPORT
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119 | /*
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120 | * Definitions for other, as yet unsupported, compression methods.
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121 | */
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122 |
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123 | #define CI_PREDICTOR_1 1 /* config option for Predictor-1 */
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124 | #define CILEN_PREDICTOR_1 2 /* length of its config option */
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125 | #define CI_PREDICTOR_2 2 /* config option for Predictor-2 */
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126 | #define CILEN_PREDICTOR_2 2 /* length of its config option */
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127 | #endif /* PREDICTOR_SUPPORT */
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128 |
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129 | typedef struct ccp_options {
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130 | #if DEFLATE_SUPPORT
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131 | unsigned int deflate :1; /* do Deflate? */
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132 | unsigned int deflate_correct :1; /* use correct code for deflate? */
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133 | unsigned int deflate_draft :1; /* use draft RFC code for deflate? */
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134 | #endif /* DEFLATE_SUPPORT */
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135 | #if BSDCOMPRESS_SUPPORT
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136 | unsigned int bsd_compress :1; /* do BSD Compress? */
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137 | #endif /* BSDCOMPRESS_SUPPORT */
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138 | #if PREDICTOR_SUPPORT
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139 | unsigned int predictor_1 :1; /* do Predictor-1? */
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140 | unsigned int predictor_2 :1; /* do Predictor-2? */
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141 | #endif /* PREDICTOR_SUPPORT */
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142 |
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143 | #if MPPE_SUPPORT
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144 | u8_t mppe; /* MPPE bitfield */
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145 | #endif /* MPPE_SUPPORT */
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146 | #if BSDCOMPRESS_SUPPORT
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147 | u_short bsd_bits; /* # bits/code for BSD Compress */
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148 | #endif /* BSDCOMPRESS_SUPPORT */
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149 | #if DEFLATE_SUPPORT
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150 | u_short deflate_size; /* lg(window size) for Deflate */
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151 | #endif /* DEFLATE_SUPPORT */
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152 | u8_t method; /* code for chosen compression method */
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153 | } ccp_options;
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154 |
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155 | extern const struct protent ccp_protent;
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156 |
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157 | void ccp_resetrequest(ppp_pcb *pcb); /* Issue a reset-request. */
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158 |
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159 | #ifdef __cplusplus
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160 | }
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161 | #endif
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162 |
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163 | #endif /* CCP_H */
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164 | #endif /* PPP_SUPPORT && CCP_SUPPORT */
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