FreeCalypso > hg > fc-magnetite
annotate src/g23m-gprs/llc/llc_rxp.c @ 212:e7a67accfad9
cdg-hybrid cdginc headers created
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 14 Oct 2016 21:52:58 +0000 |
parents | 219afcfc6250 |
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rev | line source |
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1 /* |
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2 +----------------------------------------------------------------------------- |
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3 | Project : |
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4 | Modul : |
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5 +----------------------------------------------------------------------------- |
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6 | Copyright 2002 Texas Instruments Berlin, AG |
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7 | All rights reserved. |
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8 | |
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9 | This file is confidential and a trade secret of Texas |
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10 | Instruments Berlin, AG |
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11 | The receipt of or possession of this file does not convey |
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12 | any rights to reproduce or disclose its contents or to |
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13 | manufacture, use, or sell anything it may describe, in |
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14 | whole, or in part, without the specific written consent of |
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15 | Texas Instruments Berlin, AG. |
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16 +----------------------------------------------------------------------------- |
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17 | Purpose : This modul is part of the entity LLC and implements all |
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18 | functions to handles the incoming primitives as described in |
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19 | the SDL-documentation (RX-statemachine) |
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20 +----------------------------------------------------------------------------- |
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21 */ |
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22 |
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23 #ifndef LLC_RXP_C |
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24 #define LLC_RXP_C |
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25 #endif |
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26 |
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27 #define ENTITY_LLC |
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28 |
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29 /*==== INCLUDES =============================================================*/ |
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30 |
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31 #include "typedefs.h" /* to get Condat data types */ |
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32 #include "vsi.h" /* to get a lot of macros */ |
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33 #include "macdef.h" |
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34 #include "gprs.h" |
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35 #include "gsm.h" /* to get a lot of macros */ |
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36 #include "cnf_llc.h" /* to get cnf-definitions */ |
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37 #include "mon_llc.h" /* to get mon-definitions */ |
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38 #include "prim.h" /* to get the definitions of used SAP and directions */ |
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39 #include "llc.h" /* to get the global entity definitions */ |
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40 |
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41 #include "llc_rxf.h" /* to get local RX functions */ |
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42 #include "llc_us.h" /* to get signal interface to U */ |
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43 #include "llc_uirxs.h" /* to get signal interface to UIRX */ |
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44 #include "llc_irxs.h" /* to get signal interface to IRX */ |
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45 |
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46 #ifdef _SIMULATION_ |
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47 #include <string.h> /* to get memcpy() */ |
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48 #endif |
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49 |
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50 /*==== CONST ================================================================*/ |
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51 |
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52 /*==== LOCAL VARS ===========================================================*/ |
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53 |
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54 /*==== PRIVATE FUNCTIONS ====================================================*/ |
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55 |
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56 #ifdef _SIMULATION_ |
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57 LOCAL void rx_copy_test_primitive_data (T_GRLC_UNITDATA_IND_TEST |
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58 *grlc_unitdata_ind_test, |
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59 T_GRLC_UNITDATA_IND *grlc_unitdata_ind); |
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60 #endif |
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61 |
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62 #ifndef CF_FAST_EXEC |
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63 |
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64 GLOBAL void rx_grlc_xdata_ind (T_GRLC_UNITDATA_IND *grlc_unitdata_ind); |
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65 |
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66 #endif /* CF_FAST_EXEC */ |
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67 |
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68 |
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69 /*==== PUBLIC FUNCTIONS =====================================================*/ |
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70 |
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71 |
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72 /* |
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73 +------------------------------------------------------------------------------ |
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74 | Function : rx_grlc_data_ind |
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75 +------------------------------------------------------------------------------ |
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76 | Description : Handles the primitive GRLC_DATA_IND |
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77 | |
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78 | Parameters : *grlc_data_ind - Ptr to primitive payload |
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79 | |
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80 +------------------------------------------------------------------------------ |
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81 */ |
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82 #ifndef CF_FAST_EXEC |
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83 |
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84 GLOBAL void rx_grlc_data_ind ( T_GRLC_DATA_IND *grlc_data_ind ) |
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85 { |
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86 TRACE_FUNCTION( "grlc_data_ind" ); |
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87 |
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88 switch( GET_STATE( RX ) ) |
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89 { |
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90 case RX_TLLI_ASSIGNED: |
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91 { |
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92 /* |
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93 * Both primitives are treated the same way and contain the same |
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94 * information. |
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95 */ |
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96 PPASS (grlc_data_ind, grlc_unitdata_ind, GRLC_UNITDATA_IND); |
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97 |
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98 /* |
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99 * Primitive is handled in rx_grlc_xdata_ind(). |
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100 */ |
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101 rx_grlc_xdata_ind (grlc_unitdata_ind); |
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102 break; |
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103 } |
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104 default: |
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105 PFREE_DESC (grlc_data_ind); |
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106 TRACE_ERROR( "GRLC_DATA_IND unexpected" ); |
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107 break; |
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108 } |
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109 |
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110 } /* rx_grlc_data_ind() */ |
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111 |
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112 #endif /* CF_FAST_EXEC */ |
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113 |
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114 |
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115 /* |
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116 +------------------------------------------------------------------------------ |
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117 | Function : rx_grlc_unitdata_ind |
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118 +------------------------------------------------------------------------------ |
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119 | Description : Handles the primitive GRLC_UNITDATA_IND |
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120 | |
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121 | Parameters : *grlc_unitdata_ind - Ptr to primitive payload |
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122 | |
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123 +------------------------------------------------------------------------------ |
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124 */ |
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125 #ifndef CF_FAST_EXEC |
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126 |
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127 GLOBAL void rx_grlc_unitdata_ind ( T_GRLC_UNITDATA_IND *grlc_unitdata_ind ) |
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128 { |
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129 TRACE_FUNCTION( "grlc_unitdata_ind" ); |
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130 |
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131 switch( GET_STATE( RX ) ) |
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132 { |
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133 case RX_TLLI_ASSIGNED: |
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134 /* |
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135 * Primitive is handled in rx_grlc_xdata_ind(). |
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136 */ |
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137 rx_grlc_xdata_ind (grlc_unitdata_ind); |
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138 break; |
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139 default: |
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140 PFREE_DESC (grlc_unitdata_ind); |
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141 TRACE_ERROR( "GRLC_UNITDATA_IND unexpected" ); |
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142 break; |
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143 } |
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144 |
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145 } /* rx_grlc_unitdata_ind() */ |
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146 |
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147 #endif /* CF_FAST_EXEC */ |
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148 |
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149 |
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150 /* |
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151 +------------------------------------------------------------------------------ |
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152 | Function : rx_cci_decipher_cnf |
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153 +------------------------------------------------------------------------------ |
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154 | Description : Handles the primitive CCI_DECIPHER_CNF. |
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155 | Note: The type LL_UNITDATA_IND is used instead to avoid PPASS |
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156 . |
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157 | |
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158 | Parameters : *ll_unitdata_ind - Ptr to primitive payload |
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159 | |
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160 +------------------------------------------------------------------------------ |
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161 */ |
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162 /*#if defined(CF_FAST_EXEC) || defined(_SIMULATION_) || \ |
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163 defined(LL_2to1) */ |
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164 |
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165 GLOBAL void rx_cci_decipher_cnf ( T_LL_UNITDATA_IND *ll_unitdata_ind) |
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166 { |
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167 UBYTE cipher; |
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168 T_PDU_TYPE frame_type; |
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169 T_COMMAND command; |
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170 T_BIT cr_bit; |
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171 T_BIT pf_bit; |
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172 T_FRAME_NUM nr; |
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173 T_FRAME_NUM ns; |
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174 BOOL frame_ok; |
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175 UBYTE frame_rej; |
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176 USHORT frame_rej_ctrl_length; |
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177 USHORT ctrl_len; |
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178 |
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179 |
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180 TRACE_FUNCTION( "rx_cci_decipher_cnf" ); |
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181 |
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182 cipher = ll_unitdata_ind->cipher; |
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183 |
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184 switch( GET_STATE( RX ) ) |
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185 { |
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186 case RX_TLLI_ASSIGNED: |
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187 /* variable sapi is "misused" for fcs_check value */ |
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188 if (ll_unitdata_ind->sapi EQ CCI_FCS_PASSED) |
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189 { |
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190 |
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191 { |
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192 /* |
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193 * Label INTERPRET |
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194 */ |
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195 |
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196 rx_interpret_frame (&ll_unitdata_ind->sdu, &ll_unitdata_ind->sapi, |
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197 &frame_type, &command, &cr_bit, &pf_bit, &nr, &ns, &frame_ok, |
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198 &frame_rej, &frame_rej_ctrl_length, cipher); |
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199 |
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200 SWITCH_LLC (ll_unitdata_ind->sapi); |
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201 |
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202 /* |
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203 * In case of I-frames check, if the information field exceeds N201-I |
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204 */ |
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205 if (frame_type == I_FRAME) |
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206 { |
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207 ctrl_len = I_CTRL_MIN_OCTETS; |
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208 |
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209 /* |
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210 * Add sizeof SACK-Bitmap, if necessarry (add K+1) |
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211 */ |
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212 if (command == I_SACK) |
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213 { |
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214 ctrl_len += (ll_unitdata_ind->sdu.buf[(ll_unitdata_ind->sdu.o_buf/8)+4] |
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215 & 0x1F) + 1; |
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216 } |
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217 |
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218 if (BYTELEN(ll_unitdata_ind->sdu.l_buf) > *(llc_data->n201_i) + ctrl_len) |
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219 { |
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220 frame_ok = FALSE; |
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221 frame_rej = FRMR_W2; |
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222 |
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223 TRACE_0_INFO("Received frame violates N201-I: send FRMR"); |
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224 } |
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225 } |
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226 |
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227 /* |
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228 * frame_ok includes: correct frame length, PD bit == 0, SAPI valid, |
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229 * FCS correct, known PDU type. |
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230 */ |
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231 if (frame_ok EQ TRUE) |
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232 { |
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233 rx_strip_llc_header (&ll_unitdata_ind->sdu, frame_type, command); |
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234 |
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235 /* |
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236 * Label S_DATA |
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237 */ |
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238 |
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239 switch (frame_type) |
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240 { |
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241 case U_FRAME: |
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242 /* |
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243 * Label U_FRAME |
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244 */ |
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245 |
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246 /* |
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247 * Service u_frames receives the SDU within the allocated UNITDATA |
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248 * primitive. |
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249 */ |
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250 sig_rx_u_data_ind (ll_unitdata_ind, command, cr_bit, pf_bit); |
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251 break; |
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252 case UI_FRAME: |
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253 /* |
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254 * Label UI_FRAME |
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255 */ |
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256 |
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257 sig_rx_uirx_data_ind (ll_unitdata_ind, nr); |
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258 break; |
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259 case S_FRAME: |
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260 /* |
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261 * No break. S frames and I frames are treated the same way. |
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262 */ |
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263 case I_FRAME: |
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264 /* |
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265 * Label I_FRAME |
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266 */ |
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267 |
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268 sig_rx_irx_data_ind (ll_unitdata_ind, |
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269 command, frame_type, cr_bit, pf_bit, ns, nr); |
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270 break; |
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271 default: |
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272 PFREE (ll_unitdata_ind); |
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273 TRACE_ERROR ("unknown frame type"); |
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274 break; |
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275 } |
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276 } |
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277 else /* frame_ok EQ FALSE */ |
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278 { |
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279 /* |
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280 * Check if frame rejection condition occurred, and if U has to be |
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281 * informed. |
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282 */ |
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283 if (frame_rej EQ FRAME_NOT_REJ) |
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284 { |
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285 TRACE_0_INFO("Frame ignored due to decode problem"); |
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286 PFREE (ll_unitdata_ind); |
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287 } |
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288 else /* W1 bit and/or W3 bit set */ |
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289 { |
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290 /* |
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291 * Inform U of the frame rejection condition. |
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292 */ |
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293 TRACE_0_INFO("Frame rejected due to decode problem"); |
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294 sig_rx_u_frmr_ind (ll_unitdata_ind, frame_type, frame_rej_ctrl_length, |
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295 cr_bit, frame_rej); |
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296 } |
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297 } |
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298 } /* end of validity range of ll_unitdata_ind */ |
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299 } |
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300 else /* fcs_check EQ CCI_FCS_FAILED */ |
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301 { |
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302 #ifdef TRACE_EVE |
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303 UBYTE sapi; |
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304 |
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305 rx_interpret_frame (&ll_unitdata_ind->sdu, &sapi, |
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306 &frame_type, &command, &cr_bit, &pf_bit, &nr, &ns, &frame_ok, |
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307 &frame_rej, &frame_rej_ctrl_length, cipher); |
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308 #endif |
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309 TRACE_0_INFO("Frame discarded due to FCS"); |
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310 PFREE (ll_unitdata_ind); |
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311 } |
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312 break; |
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313 default: |
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314 PFREE(ll_unitdata_ind); |
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315 TRACE_ERROR( "CCI_DECIPHER_CNF unexpected" ); |
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316 break; |
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317 } |
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318 |
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319 } /* rx_cci_decipher_cnf() */ |
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320 |
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321 /*#endif */ /* CF_FAST_EXEC || _SIMULATION_ */ |
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322 |
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323 |
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324 /* |
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325 +------------------------------------------------------------------------------ |
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326 | Function : rx_grlc_data_ind_test |
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327 +------------------------------------------------------------------------------ |
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328 | Description : Handles the primitive GRLC_DATA_IND_TEST |
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329 | NOTE: This is only necessary in simulation environment. |
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330 | |
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331 | Parameters : *grlc_data_ind_test - Ptr to primitive payload |
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332 | |
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333 +------------------------------------------------------------------------------ |
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334 */ |
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335 #ifdef _SIMULATION_ |
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336 GLOBAL void rx_grlc_data_ind_test ( T_GRLC_DATA_IND_TEST *grlc_data_ind_test ) |
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337 { |
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338 TRACE_FUNCTION( "grlc_data_ind_test" ); |
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339 |
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340 switch( GET_STATE( RX ) ) |
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341 { |
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342 case RX_TLLI_ASSIGNED: |
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343 { |
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344 /* |
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345 * Allocate a "normal" GRLC_UNITDATA_IND primitive and copy the data |
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346 * of the test primitive GRLC_DATA_IND_TEST (sdu) to |
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347 * GRLC_UNITDATA_IND (desc_list). |
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348 */ |
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349 PALLOC_DESC (grlc_unitdata_ind, GRLC_UNITDATA_IND); |
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350 |
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351 grlc_unitdata_ind->tlli = grlc_data_ind_test->tlli; |
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352 rx_copy_test_primitive_data ((T_GRLC_UNITDATA_IND_TEST *)grlc_data_ind_test, |
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353 grlc_unitdata_ind); |
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354 |
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355 /* |
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356 * Free the received test primitive. |
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357 */ |
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358 PFREE (grlc_data_ind_test); |
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359 |
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360 /* |
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361 * Primitive is handled in rx_grlc_xdata_ind(). |
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362 */ |
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363 rx_grlc_xdata_ind (grlc_unitdata_ind); |
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364 break; |
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365 } |
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366 default: |
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367 PFREE (grlc_data_ind_test); |
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368 TRACE_ERROR( "GRLC_DATA_IND_TEST unexpected" ); |
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369 break; |
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370 } |
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371 |
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372 } /* rx_grlc_data_ind_test() */ |
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373 #endif /* _SIMULATION_ */ |
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374 |
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375 |
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376 /* |
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377 +------------------------------------------------------------------------------ |
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378 | Function : rx_grlc_unitdata_ind_test |
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379 +------------------------------------------------------------------------------ |
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380 | Description : Handles the primitive GRLC_UNITDATA_IND_TEST |
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381 | NOTE: This is only necessary in simulation environment. |
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382 | |
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383 | Parameters : *grlc_unitdata_ind_test - Ptr to primitive payload |
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384 | |
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385 +------------------------------------------------------------------------------ |
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386 */ |
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387 #ifdef _SIMULATION_ |
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388 GLOBAL void rx_grlc_unitdata_ind_test ( T_GRLC_UNITDATA_IND_TEST |
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389 *grlc_unitdata_ind_test ) |
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390 { |
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391 TRACE_FUNCTION( "grlc_unitdata_ind_test" ); |
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392 |
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393 switch( GET_STATE( RX ) ) |
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394 { |
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395 case RX_TLLI_ASSIGNED: |
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396 { |
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397 /* |
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398 * Allocate a "normal" GRLC_UNITDATA_IND primitive and copy the data |
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399 * of the test primitive GRLC_UNITDATA_IND_TEST (sdu) to |
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400 * GRLC_UNITDATA_IND (desc_list). |
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401 */ |
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402 PALLOC_DESC (grlc_unitdata_ind, GRLC_UNITDATA_IND); |
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403 |
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404 grlc_unitdata_ind->tlli = grlc_unitdata_ind_test->tlli; |
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405 rx_copy_test_primitive_data (grlc_unitdata_ind_test, grlc_unitdata_ind); |
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406 |
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407 /* |
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408 * Free the received test primitive. |
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409 */ |
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410 PFREE (grlc_unitdata_ind_test); |
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411 |
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412 /* |
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413 * Primitive is handled in rx_grlc_xdata_ind(). |
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414 */ |
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415 rx_grlc_xdata_ind (grlc_unitdata_ind); |
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416 break; |
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417 } |
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418 default: |
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419 PFREE (grlc_unitdata_ind_test); |
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420 TRACE_ERROR( "GRLC_UNITDATA_IND_TEST unexpected" ); |
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421 break; |
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422 } |
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423 |
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424 } /* rx_grlc_unitdata_ind_test() */ |
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425 #endif /* _SIMULATION_ */ |
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426 |
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427 |
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428 /* |
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429 +------------------------------------------------------------------------------ |
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430 | Function : rx_copy_test_primitive_data |
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431 +------------------------------------------------------------------------------ |
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432 | Description : Copies the data of a TEST primitive (sdu) to a normal |
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433 | primitive (desc_list). |
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434 | ATTENTION: All other parameters of the primitives are left |
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435 | untouched and are not copied by this function! |
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436 | |
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437 | Parameters : *grlc_unitdata_ind_test - source primitive |
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438 | *grlc_unitdata_ind - destination primitive |
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439 | |
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440 +------------------------------------------------------------------------------ |
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441 */ |
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442 #ifdef _SIMULATION_ |
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443 LOCAL void rx_copy_test_primitive_data (T_GRLC_UNITDATA_IND_TEST |
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444 *grlc_unitdata_ind_test, |
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445 T_GRLC_UNITDATA_IND *grlc_unitdata_ind) |
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446 { |
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447 #define FRAG_LEN 80 /* value + 6 must fit in an pool with lots of entries */ |
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448 |
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449 T_sdu *sdu; |
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450 T_desc *desc; |
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451 T_desc *last_desc = NULL; |
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452 int sdu_index; |
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453 int length; |
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454 |
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455 |
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456 sdu = &grlc_unitdata_ind_test->sdu; |
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457 |
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458 /* |
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459 * Begin at the first relevant octet. |
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460 */ |
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461 sdu_index = sdu->o_buf/8; |
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462 |
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463 /* |
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464 * Initialise descriptor list length. |
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465 */ |
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466 grlc_unitdata_ind->desc_list.list_len = 0; |
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467 |
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468 |
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469 /* |
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470 * Copy complete SDU to descriptor list using descriptors of max. 10 bytes. |
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471 */ |
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472 while (sdu_index < sdu->l_buf/8) |
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473 { |
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474 /* |
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475 * Calculate length of descriptor data (= length of remaining sdu buffer |
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476 * with a maximum of FRAG_LEN) |
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477 */ |
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478 length = (sdu_index+FRAG_LEN < sdu->l_buf/8) ? FRAG_LEN |
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479 : (sdu->l_buf/8 - sdu_index); |
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480 |
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481 /* |
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482 * Allocate the necessary size for the data descriptor. The size is |
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483 * calculated as follows: |
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484 * - take the size of a descriptor structure |
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485 * - subtract one because of the array buffer[1] to get the size of |
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486 * descriptor control information |
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487 * - add number of octets of descriptor data |
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488 */ |
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489 MALLOC (desc, (USHORT)(sizeof(T_desc) - 1 + length)); |
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490 |
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491 /* |
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492 * Fill descriptor control information. |
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493 */ |
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494 desc->next = (ULONG)NULL; |
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495 desc->len = length; |
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496 |
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497 /* |
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498 * Add length of descriptor data to list length. |
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499 */ |
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500 grlc_unitdata_ind->desc_list.list_len += length; |
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501 |
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502 /* |
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503 * Copy user data from SDU to descriptor. |
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504 */ |
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505 memcpy (desc->buffer, &sdu->buf[sdu_index], length); |
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506 sdu_index += length; |
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507 |
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508 if (last_desc) |
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509 { |
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510 /* |
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511 * Add this descriptor (not the first) to the descriptor list. |
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512 */ |
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513 last_desc->next = (ULONG)desc; |
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514 } |
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515 else |
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516 { |
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517 /* |
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518 * Insert first descriptor in descriptor list. |
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519 */ |
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520 grlc_unitdata_ind->desc_list.first = (ULONG)desc; |
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521 } |
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522 |
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523 /* |
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524 * Store this descriptor for later use. |
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525 */ |
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526 last_desc = desc; |
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527 } |
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528 |
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529 return; |
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530 } /* rx_copy_test_primitive_data */ |
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531 #endif /* _SIMULATION_ */ |
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532 |
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|
533 |
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534 /* |
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535 +------------------------------------------------------------------------------ |
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536 | Function : rx_grlc_xdata_ind |
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537 +------------------------------------------------------------------------------ |
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538 | Description : Handles the primitives GRLC_DATA_IND / GRLC_UNITDATA_IND. |
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539 | |
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540 | Parameters : *grlc_unitdata_ind - Ptr to primitive payload |
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541 | |
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542 +------------------------------------------------------------------------------ |
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543 */ |
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544 #ifndef CF_FAST_EXEC |
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545 |
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546 GLOBAL void rx_grlc_xdata_ind ( T_GRLC_UNITDATA_IND *grlc_unitdata_ind ) |
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547 { |
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548 T_PDU_TYPE frame_type; |
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549 UBYTE protected_mode; |
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550 UBYTE sapi; |
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551 T_FRAME_NUM ns; |
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552 BOOL ciphering; |
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553 USHORT header_size; |
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554 BOOL frame_ok; |
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555 |
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556 |
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557 TRACE_FUNCTION( "grlc_xdata_ind" ); |
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558 |
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559 /* |
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560 * Unassigning old TLLI |
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561 * |
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562 * GMM has to be informed, that new TLLI has been received. So GMM can unassign old TLLI |
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563 * and old PTMSI in GRLC |
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564 * Old tlli will be unassigned here. Normally GMM has to sent LLGMM_ASSIGN_REQ with |
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565 * new_tlli != all 1's and old_tlli == all 1,s. See 04.64 cp. 6.1 <R.LLC.TLLI_ASS.A.002> |
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566 */ |
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567 #ifdef LL_2to1 |
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568 if ( PS_TLLI_INVALID != llc_data->tlli_old |
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569 #else |
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570 if ( LLGMM_TLLI_INVALID != llc_data->tlli_old |
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571 #endif |
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572 && grlc_unitdata_ind->tlli != llc_data->tlli_old ) |
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573 { |
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574 PALLOC ( llgmm_tlli_ind, LLGMM_TLLI_IND ); |
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575 llgmm_tlli_ind->new_tlli = grlc_unitdata_ind->tlli; |
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576 #ifdef LL_2to1 |
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577 llc_data->tlli_old = PS_TLLI_INVALID; |
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578 #else |
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579 llc_data->tlli_old = LLGMM_TLLI_INVALID; |
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580 #endif |
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581 PSEND ( hCommGMM, llgmm_tlli_ind); |
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582 } |
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583 rx_analyse_ctrl_field (grlc_unitdata_ind, &frame_type, &protected_mode, |
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584 &sapi, &ns, &ciphering, &header_size, &frame_ok); |
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585 |
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586 if (frame_ok EQ TRUE) |
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587 { |
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588 /* |
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589 * Check, if the sapi of the frame is supported. If ok, switch context |
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590 * and handle the frame. |
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591 */ |
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592 switch (sapi) |
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593 { |
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594 case LL_SAPI_1: |
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595 case LL_SAPI_3: |
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596 case LL_SAPI_5: |
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597 case LL_SAPI_7: |
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598 case LL_SAPI_9: |
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599 case LL_SAPI_11: |
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600 SWITCH_LLC (sapi); |
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601 rx_send_decipher_req (grlc_unitdata_ind, frame_type, protected_mode, |
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602 ns, header_size, ciphering); |
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603 /* |
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604 * Free only the primitive (desc_list copied in rx_send_decipher_req) |
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605 */ |
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606 PFREE (grlc_unitdata_ind); /* Do not use PFREE_DESC here !*/ |
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607 break; |
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|
608 |
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609 default: |
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610 /* |
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611 * Ignore frame. |
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|
612 * Free prim and desc_list, because they are not used further |
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|
613 */ |
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614 PFREE_DESC (grlc_unitdata_ind); |
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615 TRACE_0_INFO("Frame received for reserved SAPI"); |
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|
616 break; |
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|
617 } |
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|
618 } |
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619 else /* frame_ok NEQ TRUE */ |
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620 { |
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621 /* |
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622 * Free GRLC_UNITDATA_IND along with complete descriptor list. |
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623 */ |
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|
624 PFREE_DESC (grlc_unitdata_ind); |
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625 TRACE_EVENT("Frame ignored!"); |
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626 } |
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|
627 |
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|
628 return; |
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629 } /* rx_grlc_xdata_ind() */ |
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|
630 |
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|
631 #endif /* CF_FAST_EXEC */ |
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|
632 |