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annotate network/PPP.h @ 107:56d09a0969b5 avr-http

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Import uIP and the PPP implementation from https://code.google.com/p/avrusbmodem/
author Matt Johnston <matt@ucc.asn.au>
date Fri, 07 Sep 2012 23:53:53 +0800
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1 /*
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2 LUFA Powered Wireless 3G Modem Host
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3
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4 Copyright (C) Mike Alexander, 2010.
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5 Copyright (C) Dean Camera, 2010.
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6 */
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7
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8 /*
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9 Copyright 2010 Mike Alexander (mike [at] mikealex [dot] com)
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10 Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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11
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12 Permission to use, copy, modify, distribute, and sell this
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13 software and its documentation for any purpose is hereby granted
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14 without fee, provided that the above copyright notice appear in
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15 all copies and that both that the copyright notice and this
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16 permission notice and warranty disclaimer appear in supporting
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17 documentation, and that the name of the author not be used in
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18 advertising or publicity pertaining to distribution of the
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19 software without specific, written prior permission.
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20
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21 The author disclaim all warranties with regard to this
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22 software, including all implied warranties of merchantability
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23 and fitness. In no event shall the author be liable for any
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24 special, indirect or consequential damages or any damages
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25 whatsoever resulting from loss of use, data or profits, whether
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26 in an action of contract, negligence or other tortious action,
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27 arising out of or in connection with the use or performance of
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28 this software.
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29 */
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30
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31 #ifndef _PPP_H_
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32 #define _PPP_H_
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33
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34 /* Includes: */
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35 #include <util/crc16.h>
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36 #include <stdbool.h>
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37 #include <stdint.h>
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38
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39 #include "LinkManagement.h"
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40 #include "Lib/RingBuff.h"
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41 #include "Lib/Debug.h"
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42
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43 /* Enums: */
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44
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45 typedef enum
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46 {
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47 PPP_LAYER_Physical,
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48 PPP_LAYER_Authentication,
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49 PPP_LAYER_Network,
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50 } PPP_Layers_t;
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51
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52 typedef enum
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53 {
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54 PPP_PHASE_Dead,
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55 PPP_PHASE_Establish,
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56 PPP_PHASE_Authenticate,
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57 PPP_PHASE_Network,
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58 PPP_PHASE_Terminate
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59 } PPP_Phases_t;
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60
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61 typedef enum
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62 {
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63 PPP_STATE_Initial,
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64 PPP_STATE_Starting,
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65 PPP_STATE_Closed,
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66 PPP_STATE_Stopped,
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67 PPP_STATE_Closing,
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68 PPP_STATE_Stopping,
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69 PPP_STATE_Req_Sent,
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70 PPP_STATE_Ack_Rcvd,
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71 PPP_STATE_Ack_Sent,
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72 PPP_STATE_Opened
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73 } PPP_States_t;
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74
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75 typedef enum
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76 {
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77 PPP_EVENT_Up,
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78 PPP_EVENT_Down,
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79 PPP_EVENT_Open,
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80 PPP_EVENT_Close,
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81 PPP_EVENT_TOPlus,
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82 PPP_EVENT_TOMinus,
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83 PPP_EVENT_RCRPlus,
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84 PPP_EVENT_RCRMinus,
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85 PPP_EVENT_RCA,
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86 PPP_EVENT_RCN,
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87 PPP_EVENT_RTR,
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88 PPP_EVENT_RTA,
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89 PPP_EVENT_RUC,
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90 PPP_EVENT_RXJPlus,
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91 PPP_EVENT_RXJMinus,
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92 PPP_EVENT_RXR
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93 } PPP_Events_t;
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94
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95 /* Type Defines: */
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96 typedef struct
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97 {
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98 uint8_t Type;
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99 uint8_t Length;
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100 uint8_t Data[];
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101 } PPP_Option_t;
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102
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103 typedef struct
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104 {
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105 uint8_t Code;
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106 uint8_t PacketID;
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107 uint16_t Length;
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108 PPP_Option_t Options[];
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109 } PPP_Packet_t;
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110
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111 /* Macros: */
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112 #define CALC_CRC16(crcvalue, c) _crc_ccitt_update(crcvalue, c);
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113
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114 // Defines for LCP Negotiation Codes
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115 #define REQ 1 // Request options list for PPP negotiations
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116 #define ACK 2 // Acknowledge options list for PPP negotiations
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117 #define NAK 3 // Not acknowledged options list for PPP negotiations
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118 #define REJ 4 // Reject options list for PPP negotiations
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119 #define TERMREQ 5 // Termination request for LCP to close connection
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120 #define TERMREPLY 6 // Termination reply
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121 #define CODEREJ 7 // Code reject
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122 #define PROTREJ 8 // Protocol reject
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123 #define ECHOREQ 9 // Echo Request
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124 #define ECHOREPLY 10 // Echo Reply
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125 #define DISC 11 // Discard request
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126
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127 // Packet Types (Protocols)
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128 #define IP 0x0021 // Internet Protocol packet
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129 #define IPCP 0x8021 // Internet Protocol Configure Protocol packet
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130 #define LCP 0xC021 // Link Configure Protocol packet
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131 #define PAP 0xC023 // Password Authentication Protocol packet
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132 #define CHAP 0xC223 // Challenge Handshake Authentication Protocol packet
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133 #define NONE 0x0000
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134
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135 #define LCP_OPTION_Maximum_Receive_Unit 0x1 // LCP Option 1
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136 #define LCP_OPTION_Async_Control_Character_Map 0x2 // LCP Option 2
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137 #define LCP_OPTION_Authentication_Protocol 0x3 // LCP Option 3
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138 #define LCP_OPTION_Quality_Protocol 0x4 // LCP Option 4
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139 #define LCP_OPTION_Magic_Number 0x5 // LCP Option 5
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140 #define LCP_OPTION_Reserved 0x6 // LCP Option 6
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141 #define LCP_OPTION_Protocol_Field_Compression 0x7 // LCP Option 7
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142 #define LCP_OPTION_Address_and_Control_Field_Compression 0x8 // LCP Option 8
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143 #define LCP_OPTION_Callback 0xd // LCP Option D
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144
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145 #define IPCP_OPTION_IP_Compression_Protocol 0x2 // IPCP Option 2
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146 #define IPCP_OPTION_IP_address 0x3 // IPCP Option 3
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147 #define IPCP_OPTION_Primary_DNS 0x81 // IPCP Option 81
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148 #define IPCP_OPTION_Secondary_DNS 0x83 // IPCP Option 83
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149
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150 #define MAX_RESTARTS 5
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151 #define OUTGOING_PACKET_BUFFER_SIZE 48
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152
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153 /* External Variables: */
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154 extern uint8_t ConnectedState;
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155
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156 /* Function Prototypes: */
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157 void PPP_ManageLink(void);
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158 void PPP_InitPPP(void);
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159 void PPP_LinkTimer(void);
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160 void PPP_LinkUp(void);
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161 void PPP_LinkOpen(void);
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162 void PPP_StartLink(void);
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163
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164 #if defined(INCLUDE_FROM_PPP_C)
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165 static PPP_Option_t* PPP_GetNextOption(const PPP_Packet_t* const ThisPacket,
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166 const PPP_Option_t* const CurrentOption);
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167 static void PPP_RemoveOption(PPP_Packet_t* const ThisPacket,
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168 const uint8_t Type);
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169 static void PPP_AddOption(const PPP_Option_t*);
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170 static bool PPP_CheckForOption(const PPP_Option_t*);
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171 static void PPP_ChangeOption(PPP_Packet_t* const ThisPacket,
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172 const PPP_Option_t* const Option);
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173 static void PPP_ProcessNAK(void);
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174 static void PPP_ProcessREJ(void);
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175 static bool PPP_TestForNAK(const PPP_Option_t* const Option);
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176 static bool PPP_TestForREJ(const uint8_t Options[],
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177 const uint8_t NumOptions);
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178 static void PPP_ManageState(const PPP_Events_t Event,
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179 PPP_States_t* const State,
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180 PPP_Layers_t const Layer);
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181 static void Send_Configure_Request(void);
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182 static void Send_Configure_Ack(void);
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183 static void Send_Configure_Nak_Rej(void);
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184 static void Send_Terminate_Request(void);
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185 static void Send_Terminate_Ack(void);
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186 static void Send_Code_Reject(void);
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187 static void Send_Echo_Reply(void);
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188 static void This_Layer_Up(PPP_Layers_t Layer);
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189 static void This_Layer_Down(PPP_Layers_t Layer);
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190 static void This_Layer_Started(PPP_Layers_t Layer);
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191 static void This_Layer_Finished(PPP_Layers_t Layer);
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192 #endif
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193
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194 #endif
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195
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196