1 | /*
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2 | * lcp.h - Link Control Protocol definitions.
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3 | *
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4 | * Copyright (c) 1984-2000 Carnegie Mellon University. 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. Redistributions in binary form must reproduce the above copyright
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14 | * notice, this list of conditions and the following disclaimer in
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15 | * the documentation and/or other materials provided with the
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16 | * distribution.
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17 | *
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18 | * 3. The name "Carnegie Mellon University" must not be used to
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19 | * endorse or promote products derived from this software without
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20 | * prior written permission. For permission or any legal
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21 | * details, please contact
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22 | * Office of Technology Transfer
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23 | * Carnegie Mellon University
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24 | * 5000 Forbes Avenue
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25 | * Pittsburgh, PA 15213-3890
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26 | * (412) 268-4387, fax: (412) 268-7395
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27 | * tech-transfer@andrew.cmu.edu
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28 | *
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29 | * 4. Redistributions of any form whatsoever must retain the following
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30 | * acknowledgment:
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31 | * "This product includes software developed by Computing Services
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32 | * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
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33 | *
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34 | * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
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35 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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36 | * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
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37 | * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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38 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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39 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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40 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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41 | *
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42 | * $Id$
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43 | */
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44 |
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45 | #include "netif/ppp/ppp_opts.h"
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46 | #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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47 |
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48 | #ifndef LCP_H
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49 | #define LCP_H
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50 |
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51 | #include "ppp.h"
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52 |
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53 | #ifdef __cplusplus
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54 | extern "C" {
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55 | #endif
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56 |
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57 | /*
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58 | * Options.
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59 | */
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60 | #define CI_VENDOR 0 /* Vendor Specific */
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61 | #define CI_MRU 1 /* Maximum Receive Unit */
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62 | #define CI_ASYNCMAP 2 /* Async Control Character Map */
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63 | #define CI_AUTHTYPE 3 /* Authentication Type */
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64 | #define CI_QUALITY 4 /* Quality Protocol */
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65 | #define CI_MAGICNUMBER 5 /* Magic Number */
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66 | #define CI_PCOMPRESSION 7 /* Protocol Field Compression */
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67 | #define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
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68 | #define CI_FCSALTERN 9 /* FCS-Alternatives */
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69 | #define CI_SDP 10 /* Self-Describing-Pad */
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70 | #define CI_NUMBERED 11 /* Numbered-Mode */
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71 | #define CI_CALLBACK 13 /* callback */
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72 | #define CI_MRRU 17 /* max reconstructed receive unit; multilink */
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73 | #define CI_SSNHF 18 /* short sequence numbers for multilink */
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74 | #define CI_EPDISC 19 /* endpoint discriminator */
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75 | #define CI_MPPLUS 22 /* Multi-Link-Plus-Procedure */
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76 | #define CI_LDISC 23 /* Link-Discriminator */
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77 | #define CI_LCPAUTH 24 /* LCP Authentication */
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78 | #define CI_COBS 25 /* Consistent Overhead Byte Stuffing */
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79 | #define CI_PREFELIS 26 /* Prefix Elision */
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80 | #define CI_MPHDRFMT 27 /* MP Header Format */
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81 | #define CI_I18N 28 /* Internationalization */
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82 | #define CI_SDL 29 /* Simple Data Link */
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83 |
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84 | /*
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85 | * LCP-specific packet types (code numbers).
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86 | */
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87 | #define PROTREJ 8 /* Protocol Reject */
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88 | #define ECHOREQ 9 /* Echo Request */
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89 | #define ECHOREP 10 /* Echo Reply */
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90 | #define DISCREQ 11 /* Discard Request */
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91 | #define IDENTIF 12 /* Identification */
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92 | #define TIMEREM 13 /* Time Remaining */
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93 |
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94 | /* Value used as data for CI_CALLBACK option */
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95 | #define CBCP_OPT 6 /* Use callback control protocol */
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96 |
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97 | #if 0 /* moved to ppp_opts.h */
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98 | #define DEFMRU 1500 /* Try for this */
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99 | #define MINMRU 128 /* No MRUs below this */
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100 | #define MAXMRU 16384 /* Normally limit MRU to this */
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101 | #endif /* moved to ppp_opts.h */
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102 |
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103 | /* An endpoint discriminator, used with multilink. */
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104 | #define MAX_ENDP_LEN 20 /* maximum length of discriminator value */
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105 | struct epdisc {
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106 | unsigned char class_; /* -- The word "class" is reserved in C++. */
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107 | unsigned char length;
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108 | unsigned char value[MAX_ENDP_LEN];
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109 | };
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110 |
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111 | /*
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112 | * The state of options is described by an lcp_options structure.
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113 | */
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114 | typedef struct lcp_options {
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115 | unsigned int passive :1; /* Don't die if we don't get a response */
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116 | unsigned int silent :1; /* Wait for the other end to start first */
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117 | #if 0 /* UNUSED */
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118 | unsigned int restart :1; /* Restart vs. exit after close */
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119 | #endif /* UNUSED */
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120 | unsigned int neg_mru :1; /* Negotiate the MRU? */
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121 | unsigned int neg_asyncmap :1; /* Negotiate the async map? */
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122 | #if PAP_SUPPORT
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123 | unsigned int neg_upap :1; /* Ask for UPAP authentication? */
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124 | #endif /* PAP_SUPPORT */
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125 | #if CHAP_SUPPORT
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126 | unsigned int neg_chap :1; /* Ask for CHAP authentication? */
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127 | #endif /* CHAP_SUPPORT */
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128 | #if EAP_SUPPORT
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129 | unsigned int neg_eap :1; /* Ask for EAP authentication? */
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130 | #endif /* EAP_SUPPORT */
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131 | unsigned int neg_magicnumber :1; /* Ask for magic number? */
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132 | unsigned int neg_pcompression :1; /* HDLC Protocol Field Compression? */
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133 | unsigned int neg_accompression :1; /* HDLC Address/Control Field Compression? */
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134 | #if LQR_SUPPORT
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135 | unsigned int neg_lqr :1; /* Negotiate use of Link Quality Reports */
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136 | #endif /* LQR_SUPPORT */
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137 | unsigned int neg_cbcp :1; /* Negotiate use of CBCP */
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138 | #ifdef HAVE_MULTILINK
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139 | unsigned int neg_mrru :1; /* negotiate multilink MRRU */
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140 | #endif /* HAVE_MULTILINK */
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141 | unsigned int neg_ssnhf :1; /* negotiate short sequence numbers */
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142 | unsigned int neg_endpoint :1; /* negotiate endpoint discriminator */
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143 |
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144 | u16_t mru; /* Value of MRU */
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145 | #ifdef HAVE_MULTILINK
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146 | u16_t mrru; /* Value of MRRU, and multilink enable */
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147 | #endif /* MULTILINK */
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148 | #if CHAP_SUPPORT
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149 | u8_t chap_mdtype; /* which MD types (hashing algorithm) */
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150 | #endif /* CHAP_SUPPORT */
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151 | u32_t asyncmap; /* Value of async map */
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152 | u32_t magicnumber;
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153 | u8_t numloops; /* Number of loops during magic number neg. */
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154 | #if LQR_SUPPORT
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155 | u32_t lqr_period; /* Reporting period for LQR 1/100ths second */
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156 | #endif /* LQR_SUPPORT */
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157 | struct epdisc endpoint; /* endpoint discriminator */
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158 | } lcp_options;
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159 |
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160 | void lcp_open(ppp_pcb *pcb);
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161 | void lcp_close(ppp_pcb *pcb, const char *reason);
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162 | void lcp_lowerup(ppp_pcb *pcb);
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163 | void lcp_lowerdown(ppp_pcb *pcb);
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164 | void lcp_sprotrej(ppp_pcb *pcb, u_char *p, int len); /* send protocol reject */
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165 |
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166 | extern const struct protent lcp_protent;
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167 |
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168 | #if 0 /* moved to ppp_opts.h */
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169 | /* Default number of times we receive our magic number from the peer
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170 | before deciding the link is looped-back. */
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171 | #define DEFLOOPBACKFAIL 10
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172 | #endif /* moved to ppp_opts.h */
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173 |
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174 | #ifdef __cplusplus
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175 | }
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176 | #endif
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177 |
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178 | #endif /* LCP_H */
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179 | #endif /* PPP_SUPPORT */
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