1 | /*
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2 | pps.c
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3 | Protocol Parameters Selection
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4 |
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5 | This file is part of the Unix driver for Towitoko smartcard readers
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6 | Copyright (C) 2000 2001 Carlos Prados <cprados@yahoo.com>
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7 |
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8 | This version is modified by doz21 to work in a special manner ;)
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9 |
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10 | This library is free software; you can redistribute it and/or
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11 | modify it under the terms of the GNU Lesser General Public
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12 | License as published by the Free Software Foundation; either
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13 | version 2 of the License, or (at your option) any later version.
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14 |
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15 | This library is distributed in the hope that it will be useful,
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 | Lesser General Public License for more details.
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19 |
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20 | You should have received a copy of the GNU Lesser General Public
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21 | License along with this library; if not, write to the Free Software
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22 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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23 | */
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24 |
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25 | #include "pps.h"
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26 | #include "atr.h"
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27 | #include "protocol_t0.h"
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28 | #include "protocol_t1.h"
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29 | #include <stdlib.h>
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30 | #include <stdio.h>
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31 | #include <string.h>
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32 | #include "ifd.h"
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33 | #include "../globals.h"
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34 |
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35 | /*
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36 | * Not exported constants definition
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37 | */
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38 |
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39 | #define PPS_DEFAULT_PROTOCOL 0x00
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40 |
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41 | /*
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42 | * Not exported macros definition
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43 | */
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44 |
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45 | #define PPS_HAS_PPS1(block) ((block[1] & 0x10) == 0x10)
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46 | #define PPS_HAS_PPS2(block) ((block[1] & 0x20) == 0x20)
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47 | #define PPS_HAS_PPS3(block) ((block[1] & 0x40) == 0x40)
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48 |
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49 | /*
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50 | * Not exported funtions declaration
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51 | */
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52 |
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53 | static int PPS_Exchange (PPS * pps, BYTE * params, unsigned *length);
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54 |
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55 | static bool PPS_Match (BYTE * request, unsigned len_request, BYTE * reply, unsigned len_reply);
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56 |
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57 | static unsigned PPS_GetLength (BYTE * block);
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58 |
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59 | static int PPS_InitICC (PPS * pps);
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60 |
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61 | static int PPS_InitProtocol (PPS * pps, int protocol_selected);
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62 |
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63 | static BYTE PPS_GetPCK (BYTE * block, unsigned length);
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64 |
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65 | /*
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66 | * Exported functions definition
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67 | */
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68 |
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69 | PPS * PPS_New (ICC_Async * icc)
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70 | {
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71 | PPS *pps;
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72 |
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73 | pps = (PPS *) malloc (sizeof (PPS));
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74 |
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75 | if (pps != NULL)
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76 | {
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77 | pps->icc = icc;
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78 | pps->protocol = NULL;
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79 | pps->parameters.t = PPS_DEFAULT_PROTOCOL;
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80 | pps->parameters.FI = ATR_DEFAULT_FI;
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81 | pps->parameters.d = ATR_DEFAULT_D;
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82 | pps->parameters.n = ATR_DEFAULT_N;
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83 | }
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84 |
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85 | return pps;
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86 | }
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87 |
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88 | int PPS_Perform (PPS * pps, BYTE * params, unsigned *length)
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89 | {
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90 | //Performs PPS Exchange on command when *length >0
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91 | //If unsuccesfull, or when length <= 0
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92 | //Gets parametes from ATR
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93 | //If necessary perform PPS session
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94 | //
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95 | //Output is pps->params.FI,n,d,t set with correct values
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96 | //and switched SC-device conform these values to correct baudrate
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97 | //
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98 | //We need to store FI instread of F, because SCI_DEV works with FI
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99 | //and it is easier to overclock then
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100 | //also from FI -> F is easy, other way around not
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101 |
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102 | ATR *atr;
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103 | int ret;
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104 | bool PPS_success;
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105 |
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106 | /* Perform PPS Exchange if requested by command */
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107 | if ((*length) > 0)
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108 | {
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109 | ret = PPS_Exchange (pps, params, length);
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110 |
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111 | /* Get parameters from PPS handsake */
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112 | if (ret == PPS_OK)
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113 | {
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114 | pps->parameters.t = params[1] & 0x0F;
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115 |
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116 | if (PPS_HAS_PPS1 (params))
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117 | {
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118 | pps->parameters.FI = (params[2] >> 4);
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119 | pps->parameters.d = atr_d_table[(params[2] & 0x0F)];
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120 | }
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121 |
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122 | /*
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123 | ret = PPS_InitICC(pps);
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124 |
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125 | if (ret != PPS_OK)
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126 | return ret;
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127 | */
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128 | }
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129 | /*
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130 | else
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131 | {
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132 | return ret;
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133 | }
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134 | */
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135 | }
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136 | PPS_success = PPS_OK;
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137 | int protocol_selected = 0; //stores which TAi,TBi etc. bytes must be used 0 means not set
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138 | atr = ICC_Async_GetAtr (pps->icc);
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139 | if ((*length) <= 0 || !PPS_success) // If not by command, or PPS Exchange by command failed: Try PPS Exchange by ATR or Get parameters from ATR
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140 | {
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141 | int numprot = atr->pn;
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142 | //if there is a trailing TD, this number is one too high
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143 | BYTE tx;
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144 | if (ATR_GetInterfaceByte (atr, numprot-1, ATR_INTERFACE_BYTE_TD, &tx) == ATR_OK)
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145 | if ((tx & 0xF0) == 0)
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146 | numprot--;
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147 | cs_debug("ATR reports %i protocol lines:",numprot);
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148 | int i,point;
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149 | char txt[50];
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150 | bool OffersT[3]; //T14 stored as T2
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151 | for (i = 0; i <= 2; i++)
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152 | OffersT[i] = FALSE;
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153 | for (i=1; i<= numprot; i++) {
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154 | point = 0;
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155 | if (ATR_GetInterfaceByte (atr, i, ATR_INTERFACE_BYTE_TA, &tx) == ATR_OK) {
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156 | sprintf((char *)txt+point,"TA%i=%02X ",i,tx);
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157 | point +=7;
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158 | }
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159 | if (ATR_GetInterfaceByte (atr, i, ATR_INTERFACE_BYTE_TB, &tx) == ATR_OK) {
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160 | sprintf((char *)txt+point,"TB%i=%02X ",i,tx);
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161 | point +=7;
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162 | }
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163 | if (ATR_GetInterfaceByte (atr, i, ATR_INTERFACE_BYTE_TC, &tx) == ATR_OK) {
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164 | sprintf((char *)txt+point,"TC%i=%02X ",i,tx);
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165 | point +=7;
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166 | }
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167 | if (ATR_GetInterfaceByte (atr, i, ATR_INTERFACE_BYTE_TD, &tx) == ATR_OK) {
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168 | sprintf((char *)txt+point,"TD%i=%02X ",i,tx);
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169 | point +=7;
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170 | tx &= 0X0F;
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171 | sprintf((char *)txt+point,"(T%i)",tx);
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172 | if (tx == 14)
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173 | OffersT[2] = TRUE;
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174 | else
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175 | OffersT[tx] = TRUE;
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176 | }
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177 | else {
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178 | sprintf((char *)txt+point,"no TD%i means T0",i);
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179 | OffersT[0] = TRUE;
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180 | }
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181 | cs_debug("%s",txt);
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182 | }
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183 |
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184 | int numprottype = 0;
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185 | for (i = 0; i <= 2; i++)
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186 | if (OffersT[i])
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187 | numprottype ++;
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188 | cs_debug("%i protocol types detected. Historical bytes: %s",numprottype, cs_hexdump(1,atr->hb,atr->hbn));
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189 |
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190 | //If more than one protocol type and/or TA1 parameter values other than the default values and/or N equeal to 255 is/are indicated in the answer to reset, the card shall know unambiguously, after having sent the answer to reset, which protocol type or/and transmission parameter values (FI, D, N) will be used. Consequently a selection of the protocol type and/or the transmission parameters values shall be specified.
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191 | ATR_GetParameter (atr, ATR_PARAMETER_N, &(pps->parameters.n));
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192 | ATR_GetProtocolType(atr,1,&(pps->parameters.t)); //get protocol from TD1
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193 | BYTE TA2;
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194 | bool SpecificMode = (ATR_GetInterfaceByte (atr, 2, ATR_INTERFACE_BYTE_TA, &TA2) == ATR_OK); //if TA2 present, specific mode, else negotiable mode
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195 | if (SpecificMode) {
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196 | pps->parameters.t = TA2 & 0x0F;
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197 | if ((TA2 & 0x10) != 0x10) { //bit 5 set to 0 means F and D explicitly defined in interface characters
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198 | BYTE TA1;
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199 | if (ATR_GetInterfaceByte (atr, 1 , ATR_INTERFACE_BYTE_TA, &TA1) == ATR_OK) {
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200 | pps->parameters.FI = TA1 >> 4;
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201 | ATR_GetParameter (atr, ATR_PARAMETER_D, &(pps->parameters.d));
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202 | }
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203 | else {
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204 | pps->parameters.FI = ATR_DEFAULT_FI;
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205 | pps->parameters.d = ATR_DEFAULT_D;
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206 | }
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207 | }
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208 | else {
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209 | cs_log("Specific mode: speed 'implicitly defined', not sure how to proceed, assuming default values");
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210 | pps->parameters.FI = ATR_DEFAULT_FI;
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211 | pps->parameters.d = ATR_DEFAULT_D;
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212 | }
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213 | cs_debug("Specific mode: T%i, F=%.0f, D=%.6f, N=%.0f\n", pps->parameters.t, (double) atr_f_table[pps->parameters.FI], pps->parameters.d, pps->parameters.n);
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214 | }
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215 | else { //negotiable mode
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216 |
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217 | bool NeedsPTS = ((pps->parameters.t != 14) && (numprottype > 1 || (atr->ib[0][ATR_INTERFACE_BYTE_TA].present == TRUE && atr->ib[0][ATR_INTERFACE_BYTE_TA].value != 0x11) || pps->parameters.n == 255)); //needs PTS according to ISO 7816 , SCI gets stuck on our PTS
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218 | if (NeedsPTS) {
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219 | // PTSS PTS0 PTS1 PTS2 PTS3 PCK
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220 | // PTSS PTS0 PTS1 PCK
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221 | BYTE req[] = { 0xFF, 0x10, 0x00, 0x00 }; //we currently do not support PTS2, standard guardtimes
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222 | req[1]=0x10 | pps->parameters.t; //PTS0 always flags PTS1 to be sent always
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223 | if (ATR_GetInterfaceByte (atr, 1, ATR_INTERFACE_BYTE_TA, &req[2]) != ATR_OK) //PTS1
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224 | req[2] = 0x11; //defaults FI and DI to 1
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225 | //req[3]=PPS_GetPCK(req,sizeof(req)-1); will be set by PPS_Exchange
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226 | unsigned int len = sizeof(req);
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227 | ret = PPS_Exchange (pps, req, &len);
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228 | if (ret == PPS_OK) {
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229 | pps->parameters.FI = req[2] >> 4;
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230 | BYTE DI = req[2] & 0x0F;
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231 | pps->parameters.d = (double) (atr_d_table[DI]);
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232 | PPS_success = TRUE;
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233 | cs_debug("PTS Succesfull, selected protocol: T%i, F=%.0f, D=%.6f, N=%.0f\n", pps->parameters.t, (double) atr_f_table[pps->parameters.FI], pps->parameters.d, pps->parameters.n);
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234 | }
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235 | else
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236 | cs_ddump(req,4,"PTS Failure, response:");
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237 | }
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238 |
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239 | //FIXME Currently InitICC sets baudrate to 9600 for all T14 cards (=no switching);
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240 | //When for SCI, T14 protocol, TA1 is obeyed, this goes OK for mosts devices, but somehow on DM7025 Sky S02 card goes wrong when setting ETU (ok on DM800/DM8000)
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241 | if (!PPS_success) {//last PPS not succesfull
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242 | BYTE TA1;
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243 | if (ATR_GetInterfaceByte (atr, 1 , ATR_INTERFACE_BYTE_TA, &TA1) == ATR_OK) {
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244 | pps->parameters.FI = TA1 >> 4;
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245 | ATR_GetParameter (atr, ATR_PARAMETER_D, &(pps->parameters.d));
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246 | }
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247 | else { //do not obey TA1
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248 | pps->parameters.FI = ATR_DEFAULT_FI;
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249 | pps->parameters.d = ATR_DEFAULT_D;
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250 | }
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251 | ATR_GetProtocolType (atr, 1, &(pps->parameters.t));
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252 | protocol_selected = 1;
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253 |
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254 | if (NeedsPTS) {
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255 | if ((pps->parameters.d == 32) || (pps->parameters.d == 12) || (pps->parameters.d == 20))
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256 | pps->parameters.d = 0; //behave conform "old" atr_d_table; viaccess cards that fail PTS need this
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257 | }
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258 | /////Here all non-ISO behaviour
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259 | /////End all non-ISO behaviour
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260 |
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261 | cs_debug("No PTS %s, selected protocol T%i, F=%.0f, D=%.6f, N=%.0f\n", NeedsPTS?"happened":"needed", pps->parameters.t, (double) atr_f_table[pps->parameters.FI], pps->parameters.d, pps->parameters.n);
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262 | }
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263 | }//end negotiable mode
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264 | }//end length<0
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265 |
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266 | //make sure no zero values
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267 | double F = (double) atr_f_table[pps->parameters.FI];
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268 | if (!F) {
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269 | pps->parameters.FI = ATR_DEFAULT_FI;
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270 | cs_log("Warning: F=0 is invalid, forcing FI=%d", pps->parameters.FI);
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271 | }
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272 | if (!pps->parameters.d) {
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273 | pps->parameters.d = ATR_DEFAULT_D;
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274 | cs_log("Warning: D=0 is invalid, forcing D=%.0f",pps->parameters.d);
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275 | }
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276 |
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277 | pps->icc->protocol_type = pps->parameters.t;
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278 |
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279 | #ifdef DEBUG_PROTOCOL
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280 | printf("PPS: T=%i, F=%.0f, D=%.6f, N=%.0f\n",
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281 | pps->parameters.t,
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282 | F,
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283 | pps->parameters.d,
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284 | pps->parameters.n);
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285 | #endif
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286 |
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287 | ret = PPS_InitICC(pps);
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288 |
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289 | if (ret != PPS_OK)
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290 | return ret;
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291 |
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292 | /* Initialize selected protocol with selected parameters */
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293 | if (pps->parameters.t == 1)
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294 | ret = PPS_InitProtocol (pps, 3); //FIXME in practice most T1 cards carry timing parameters in TA3, TB3 and TC3
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295 | else
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296 | ret = PPS_InitProtocol (pps, 2); //FIXME T0 cards carry timing parameters in TC2
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297 |
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298 | return ret;
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299 | }
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300 |
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301 | void * PPS_GetProtocol (PPS * pps)
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302 | {
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303 | return pps->protocol;
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304 | }
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305 |
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306 | PPS_ProtocolParameters *PPS_GetProtocolParameters (PPS * pps)
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307 | {
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308 | /* User must Remember not to reference this struct after removing PPS */
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309 | return &(pps->parameters);
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310 | }
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311 |
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312 | void PPS_Delete (PPS * pps)
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313 | {
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314 | free (pps);
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315 | }
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316 |
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317 | /*
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318 | * Not exported funtions definition
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319 | */
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320 |
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321 | static int PPS_Exchange (PPS * pps, BYTE * params, unsigned *length)
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322 | {
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323 | BYTE confirm[PPS_MAX_LENGTH];
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324 | unsigned len_request, len_confirm;
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325 | int ret;
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326 | #ifdef DEBUG_PROTOCOL
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327 | int i;
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328 | #endif
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329 |
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330 | len_request = PPS_GetLength (params);
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331 | params[len_request - 1] = PPS_GetPCK(params, len_request - 1);
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332 |
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333 | #ifdef DEBUG_PROTOCOL
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334 | printf ("PPS: Sending request: ");
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335 | for (i = 0; i < len_request; i++)
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336 | printf ("%X ", params[i]);
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337 | printf ("\n");
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338 | #endif
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339 |
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340 | cs_debug("PTS: Sending request: %s", cs_hexdump(1, params, len_request));
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341 |
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342 | /* Send PPS request */
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343 | #ifdef COOL
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344 | //unsigned char ptsAck[10];
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345 | //u_int8 ptsLen = len_request;
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346 | unsigned short int ptsLen = len_request;
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347 | int Status = cnxt_smc_start_pps(handle, params, confirm, &ptsLen, TRUE);
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348 | printf ("cnxt_smc_start_pps Status=%i\n", Status);
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349 | len_confirm = ptsLen;
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350 | #ifdef DEBUG_PROTOCOL
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351 | printf("COOL: confirm: \n");
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352 | for (i = 0; i < ptsLen; i++)
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353 | printf ("%02X", confirm[i]);
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354 | printf ("\n");
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355 | fflush(stdout);
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356 | printf("COOL: req: \n");
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357 | for (i = 0; i < len_request; i++)
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358 | printf ("%02X", params[i]);
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359 | printf ("\n");
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360 | fflush(stdout);
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361 | #endif
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362 | if (Status)
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363 | return PPS_HANDSAKE_ERROR;
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364 | #else
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365 | if (ICC_Async_Transmit (pps->icc, len_request, params) != ICC_ASYNC_OK)
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366 | return PPS_ICC_ERROR;
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367 |
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368 | /* Get PPS confirm */
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369 | if (ICC_Async_Receive (pps->icc, 2, confirm) != ICC_ASYNC_OK)
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370 | return PPS_ICC_ERROR;
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371 |
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372 | len_confirm = PPS_GetLength (confirm);
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373 |
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374 | if (ICC_Async_Receive (pps->icc, len_confirm - 2, confirm + 2) != ICC_ASYNC_OK)
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375 | return PPS_ICC_ERROR;
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376 |
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377 | #ifdef DEBUG_PROTOCOL
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378 | printf ("PPS: Receivig confirm: ");
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379 | for (i = 0; i < len_confirm; i++)
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380 | printf ("%X ", confirm[i]);
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381 | printf ("\n");
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382 | #endif
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383 |
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384 | cs_debug("PTS: Receiving confirm: %s", cs_hexdump(1, confirm, len_confirm));
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385 |
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386 | if (!PPS_Match (params, len_request, confirm, len_confirm))
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387 | ret = PPS_HANDSAKE_ERROR;
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388 | else
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389 | ret = PPS_OK;
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390 | #endif
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391 |
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392 | /* Copy PPS handsake */
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393 | memcpy (params, confirm, len_confirm);
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394 | (*length) = len_confirm;
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395 |
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396 | return ret;
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397 | }
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398 |
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399 | static bool PPS_Match (BYTE * request, unsigned len_request, BYTE * confirm, unsigned len_confirm)
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400 | {
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401 | /* See if the reply differs from request */
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402 | if ((len_request != len_confirm) || (memcmp (request, confirm, len_request)))
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403 | {
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404 | /* See if the card specifies other than default FI and D */
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405 | //if ((PPS_HAS_PPS1 (confirm)) && (confirm[2] != request[2]))
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406 | return FALSE;
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407 | }
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408 |
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409 | return TRUE;
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410 | }
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411 |
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412 | static unsigned PPS_GetLength (BYTE * block)
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413 | {
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414 | unsigned length = 3;
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415 |
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416 | if (PPS_HAS_PPS1 (block))
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417 | length++;
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418 |
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419 | if (PPS_HAS_PPS2 (block))
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420 | length++;
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421 |
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422 | if (PPS_HAS_PPS3 (block))
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423 | length++;
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424 |
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425 | return length;
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426 | }
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427 |
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428 | static int PPS_InitICC (PPS * pps)
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429 | {
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430 | #ifdef SCI_DEV
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431 | #include <sys/ioctl.h>
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432 | #include "sci_global.h"
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433 | #include "sci_ioctl.h"
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434 | if(reader[ridx].typ == R_INTERNAL)
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435 | {
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436 | int n;
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437 | SCI_PARAMETERS params;
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438 | //memset(¶ms,0,sizeof(SCI_PARAMETERS));
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439 | if (ioctl(reader[ridx].handle, IOCTL_GET_PARAMETERS, ¶ms) < 0 )
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440 | return PPS_ICC_ERROR;
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441 |
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442 | ATR *atr = ICC_Async_GetAtr (pps->icc);
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443 |
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444 | params.T = pps->parameters.t;
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445 | params.fs = atr_fs_table[pps->parameters.FI] / 1000000;
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446 | double F = (double) atr_f_table[pps->parameters.FI];
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447 | //for Irdeto T14 cards, do not set ETU
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448 | if (!(atr->hbn >= 6 && !memcmp(atr->hb, "IRDETO", 6) && params.T == 14))
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449 | params.ETU = F / pps->parameters.d;
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450 | if (pps->parameters.n == 255) //only for T0 or also for T1?
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451 | params.EGT = 0;
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452 | else
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453 | params.EGT = pps->parameters.n;
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454 |
|
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455 | double a;
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456 | ATR_GetParameter(atr, ATR_PARAMETER_P, &a);
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457 | params.P=(unsigned char)a;
|
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458 | ATR_GetParameter(atr, ATR_PARAMETER_I, &a);
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459 | params.I=(unsigned char)a;
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460 |
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461 | cs_debug("Setting T=%d fs=%lu mhz ETU=%d WWT=%d CWT=%d BWT=%d EGT=%d clock=%d check=%d P=%d I=%d U=%d", (int)params.T, params.fs, (int)params.ETU, (int)params.WWT, (int)params.CWT, (int)params.BWT, (int)params.EGT, (int)params.clock_stop_polarity, (int)params.check, (int)params.P, (int)params.I, (int)params.U);
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462 |
|
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463 | if (ioctl(reader[ridx].handle, IOCTL_SET_PARAMETERS, ¶ms)!=0)
|
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464 | return PPS_ICC_ERROR;
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465 |
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466 | }
|
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467 | #elif COOL
|
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468 | if(reader[ridx].typ == R_INTERNAL) {
|
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469 | int mhz = atr_fs_table[pps->parameters.FI] / 10000;
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470 | if (!Cool_SetBaudrate(mhz))
|
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471 | return PPS_ICC_ERROR;
|
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472 | #ifdef DEBUG_PROTOCOL
|
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473 | printf("Coolstream: set clock to %i * 10kHz\n", mhz);
|
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474 | #endif
|
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475 | return PPS_OK;
|
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476 | }
|
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477 | #endif
|
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478 | {
|
---|
479 | unsigned long baudrate;
|
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480 | double F = (double) atr_f_table[pps->parameters.FI];
|
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481 | if (pps->parameters.t == 14)
|
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482 | baudrate = 9600;
|
---|
483 | else
|
---|
484 | baudrate = pps->parameters.d * ICC_Async_GetClockRate () / F;
|
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485 |
|
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486 | #ifdef DEBUG_PROTOCOL
|
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487 | printf ("PPS: Baudrate = %d\n", (int)baudrate);
|
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488 | #endif
|
---|
489 |
|
---|
490 |
|
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491 | if (ICC_Async_SetBaudrate (pps->icc, baudrate) != ICC_ASYNC_OK)
|
---|
492 | return PPS_ICC_ERROR;
|
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493 |
|
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494 | return PPS_OK;
|
---|
495 | }
|
---|
496 | }
|
---|
497 |
|
---|
498 | static int PPS_InitProtocol (PPS * pps, int selected_protocol)
|
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499 | {
|
---|
500 | int ret;
|
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501 |
|
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502 | if (pps->parameters.t == ATR_PROTOCOL_TYPE_T0)
|
---|
503 | {
|
---|
504 | pps->protocol = Protocol_T0_New ();
|
---|
505 |
|
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506 | if ((pps->protocol) != NULL)
|
---|
507 | {
|
---|
508 | ret = Protocol_T0_Init ((Protocol_T0 *) pps->protocol, (ICC_Async *) pps->icc, &(pps->parameters), selected_protocol);
|
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509 |
|
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510 | if (ret != PROTOCOL_T0_OK)
|
---|
511 | {
|
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512 | Protocol_T0_Delete ((Protocol_T0 *) pps->protocol);
|
---|
513 | pps->protocol = NULL;
|
---|
514 | return PPS_PROTOCOL_ERROR;
|
---|
515 | }
|
---|
516 |
|
---|
517 | return PPS_OK;
|
---|
518 | }
|
---|
519 | }
|
---|
520 | else if (pps->parameters.t == ATR_PROTOCOL_TYPE_T1)
|
---|
521 | {
|
---|
522 | pps->protocol = Protocol_T1_New ();
|
---|
523 |
|
---|
524 | if (pps->protocol != NULL)
|
---|
525 | {
|
---|
526 | ret = Protocol_T1_Init ((Protocol_T1 *) pps->protocol, (ICC_Async *) pps->icc, selected_protocol);
|
---|
527 |
|
---|
528 | if (ret != PROTOCOL_T1_OK)
|
---|
529 | {
|
---|
530 | Protocol_T1_Delete ((Protocol_T1 *) pps->protocol);
|
---|
531 | pps->protocol = NULL;
|
---|
532 | return PPS_PROTOCOL_ERROR;
|
---|
533 | }
|
---|
534 |
|
---|
535 | return PPS_OK;
|
---|
536 | }
|
---|
537 | }
|
---|
538 | else if (pps->parameters.t == ATR_PROTOCOL_TYPE_T14)
|
---|
539 | {
|
---|
540 | pps->protocol = Protocol_T14_New ();
|
---|
541 |
|
---|
542 | if ((pps->protocol) != NULL)
|
---|
543 | {
|
---|
544 | ret = Protocol_T14_Init ((Protocol_T14 *) pps->protocol, (ICC_Async *) pps->icc, &(pps->parameters), selected_protocol);
|
---|
545 |
|
---|
546 | if (ret != PROTOCOL_T14_OK)
|
---|
547 | {
|
---|
548 | Protocol_T14_Delete ((Protocol_T14 *) pps->protocol);
|
---|
549 | pps->protocol = NULL;
|
---|
550 | return PPS_PROTOCOL_ERROR;
|
---|
551 | }
|
---|
552 |
|
---|
553 | return PPS_OK;
|
---|
554 | }
|
---|
555 | }
|
---|
556 | else
|
---|
557 | {
|
---|
558 | pps->protocol = NULL;
|
---|
559 | }
|
---|
560 |
|
---|
561 | return PPS_PROTOCOL_ERROR;
|
---|
562 | }
|
---|
563 |
|
---|
564 | static BYTE PPS_GetPCK (BYTE * block, unsigned length)
|
---|
565 | {
|
---|
566 | BYTE pck;
|
---|
567 | unsigned i;
|
---|
568 |
|
---|
569 | pck = block[0];
|
---|
570 | for (i = 1; i < length; i++)
|
---|
571 | pck ^= block[i];
|
---|
572 |
|
---|
573 | return pck;
|
---|
574 | }
|
---|