FreeCalypso > hg > fc-magnetite
annotate src/g23m-gprs/llc/llc_irxf.c @ 263:6c66a681224c
aci3 aci_cmh.h: added definition for AT@SPKR
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 04 Aug 2017 20:29:46 +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 | procedures and functions as described in the |
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19 | SDL-documentation (IRX-statemachine) |
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20 +----------------------------------------------------------------------------- |
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21 */ |
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22 |
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23 #ifndef LLC_IRXF_C |
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24 #define LLC_IRXF_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 <string.h> |
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32 |
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33 #include "typedefs.h" /* to get Condat data types */ |
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34 #include "vsi.h" /* to get a lot of macros */ |
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35 #include "macdef.h" |
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36 #include "gprs.h" |
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37 #include "gsm.h" /* to get a lot of macros */ |
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38 #include "cnf_llc.h" /* to get cnf-definitions */ |
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39 #include "mon_llc.h" /* to get mon-definitions */ |
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40 #include "prim.h" /* to get the definitions of used SAP and directions */ |
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41 #include "llc.h" /* to get the global entity definitions */ |
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42 |
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43 #include "llc_itxs.h" /* to get ITX signal definitions */ |
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44 #include "llc_irxf.h" /* to get IRX local functions */ |
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45 |
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46 |
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47 /*==== CONST ================================================================*/ |
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48 |
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49 /*==== LOCAL VARS ===========================================================*/ |
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50 |
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51 /*==== PRIVATE FUNCTIONS ====================================================*/ |
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52 |
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53 /*==== PUBLIC FUNCTIONS =====================================================*/ |
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54 |
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55 |
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56 |
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57 /* |
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58 +------------------------------------------------------------------------------ |
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59 | Function : irx_init |
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60 +------------------------------------------------------------------------------ |
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61 | Description : This procedure initialises all necessary variables of |
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62 | i_frames_rx for all SAPIs. |
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63 | |
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64 | Parameters : |
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65 | |
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66 +------------------------------------------------------------------------------ |
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67 */ |
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68 GLOBAL void irx_init (void) |
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69 { |
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70 UBYTE inc; |
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71 |
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72 TRACE_FUNCTION( "irx_init" ); |
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73 |
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74 /* |
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75 * Initialise all 4 SAPIs |
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76 */ |
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77 SWITCH_SERVICE (llc, irx, 0); |
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78 INIT_STATE (IRX_0, IRX_TLLI_UNASSIGNED); |
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79 |
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80 SWITCH_SERVICE (llc, irx, 1); |
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81 INIT_STATE (IRX_1, IRX_TLLI_UNASSIGNED); |
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82 |
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83 SWITCH_SERVICE (llc, irx, 2); |
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84 INIT_STATE (IRX_2, IRX_TLLI_UNASSIGNED); |
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85 |
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86 SWITCH_SERVICE (llc, irx, 3); |
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87 INIT_STATE (IRX_3, IRX_TLLI_UNASSIGNED); |
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88 |
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89 /* |
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90 * Initialise the IRX data structure |
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91 */ |
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92 for (inc = 0; inc < IRX_NUM_INC; inc++) |
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93 { |
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94 SWITCH_SERVICE (llc, irx, inc); |
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95 |
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96 /* |
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97 * Free old used resources (in case of an LLC restart): |
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98 * memory, stored primitives, running timer. |
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99 */ |
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100 irx_queue_clean (); |
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101 |
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102 llc_data->irx->ll_send_ready = FALSE; |
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103 llc_data->irx->last_ns = NS_EQUAL_VR; |
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104 |
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105 llc_data->irx->queue = NULL; |
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106 } |
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107 |
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108 return; |
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109 } /* irx_init() */ |
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110 |
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111 |
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112 /* |
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113 +------------------------------------------------------------------------------ |
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114 | Function : irx_init_sapi |
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115 +------------------------------------------------------------------------------ |
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116 | Description : This procedure initialises all necessary variables of |
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117 | i_frames_rx for the given SAPI. |
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118 | |
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119 | Parameters : |
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120 | |
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121 +------------------------------------------------------------------------------ |
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122 */ |
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123 GLOBAL void irx_init_sapi (void) |
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124 { |
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125 TRACE_FUNCTION( "irx_init_sapi" ); |
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126 |
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127 llc_data->sapi->va = 0; |
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128 llc_data->sapi->vs = 0; |
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129 llc_data->sapi->vr = 0; |
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130 |
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131 llc_data->irx->vf = 0; |
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132 llc_data->irx->last_ns = NS_EQUAL_VR; |
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133 llc_data->irx->B_rx = 0; |
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134 |
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135 return; |
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136 } /* irx_init_sapi() */ |
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137 |
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138 |
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139 /* |
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140 +------------------------------------------------------------------------------ |
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141 | Function : irx_init_abm |
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142 +------------------------------------------------------------------------------ |
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143 | Description : This procedure initialises all necessary variables of |
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144 | i_frames_rx for the given SAPI when switching into ABM. |
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145 | |
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146 | Parameters : |
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147 | |
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148 +------------------------------------------------------------------------------ |
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149 */ |
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150 GLOBAL void irx_init_abm (void) |
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151 { |
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152 TRACE_FUNCTION( "irx_init_abm" ); |
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153 |
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154 llc_data->sapi->va = 0; |
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155 llc_data->sapi->vs = 0; |
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156 llc_data->sapi->vr = 0; |
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157 |
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158 llc_data->irx->vf = 0; |
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159 llc_data->irx->last_ns = NS_EQUAL_VR; |
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160 |
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161 /* |
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162 * Reset OCs for acknowledged transfer. |
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163 */ |
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164 llc_data->sapi->oc_i_tx = 0L; |
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165 llc_data->sapi->oc_i_rx = 0L; |
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166 |
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167 return; |
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168 } /* irx_init_abm() */ |
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169 |
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170 |
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171 |
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172 /* |
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173 +------------------------------------------------------------------------------ |
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174 | Function : irx_queue_store |
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175 +------------------------------------------------------------------------------ |
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176 | Description : This procedure stores the primitive into the per ns sorted |
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177 | queue. If the queue is full, is_busy set to TRUE will be |
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178 | returnd. |
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179 | |
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180 | Parameters : |
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181 | |
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182 +------------------------------------------------------------------------------ |
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183 */ |
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184 GLOBAL void irx_queue_store (T_LL_UNITDATA_IND *ll_unitdata_ind, |
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185 T_FRAME_NUM ns, |
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186 BOOL *is_busy) |
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187 { |
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188 T_IRX_QUEUE** entry = &(llc_data->irx->queue); |
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189 T_IRX_QUEUE* next; |
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190 T_FRAME_NUM n = llc_data->irx->vf; |
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191 ULONG M = *(llc_data->md) * 16; |
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192 |
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193 TRACE_FUNCTION( "irx_queue_store" ); |
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194 |
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195 /* |
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196 * First skip already for L3 ready waiting entries |
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197 */ |
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198 while (*entry && (*entry)->ns == n) |
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199 { |
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200 n++; |
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201 n %= (MAX_SEQUENCE_NUMBER+1); |
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202 |
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203 if ((*entry)->ns == ns) |
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204 { |
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205 /* |
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206 * Ignore duplicate frame |
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207 */ |
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208 *is_busy = FALSE; |
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209 |
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210 TRACE_0_INFO( "Unexpected duplicate frame number" ); |
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211 PFREE (ll_unitdata_ind); |
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212 |
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213 return; |
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214 } |
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215 |
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216 entry = &((*entry)->next); |
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217 } |
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218 |
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219 /* |
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220 * Now find the inserting position (queue sorted per ns, |
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221 * 'lower' frame numbers stored first) |
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222 */ |
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223 while (*entry) |
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224 { |
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225 if ((*entry)->ns == ns) |
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226 { |
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227 /* |
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228 * Ignore duplicate frame |
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229 */ |
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230 *is_busy = FALSE; |
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231 |
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232 TRACE_0_INFO( "Duplicate frame number received" ); |
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233 PFREE (ll_unitdata_ind); |
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234 |
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235 return; |
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236 } |
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237 |
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238 /* |
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239 * n <= ns <= (*entry)->ns - 1 |
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240 */ |
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241 if (FRAME_NUM_VALID( n, ns, (*entry)->ns - 1)) |
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242 { |
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243 /* |
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244 * Found a nice place in between |
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245 */ |
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246 break; |
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247 } |
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248 |
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249 entry = &((*entry)->next); |
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250 } |
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251 |
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252 /* |
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253 * Position found - save ptr to next entry |
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254 */ |
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255 next = *entry; |
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256 |
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257 /* |
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258 * Allocate memory |
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259 */ |
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260 MALLOC( *entry, sizeof(T_IRX_QUEUE) ); |
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261 |
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262 if( *entry ) |
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263 { |
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264 /* |
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265 * Memory successful allocated. Fill in struct entries. |
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266 */ |
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267 (*entry)->next = next; |
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268 (*entry)->ns = ns; |
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269 (*entry)->frame = ll_unitdata_ind; |
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270 |
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271 /* |
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272 * Increase amount of stored Information in rx queue |
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273 */ |
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274 llc_data->irx->B_rx += BYTELEN(ll_unitdata_ind->sdu.l_buf); |
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275 |
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276 /* |
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277 * Determine 'own receiver busy' condition |
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278 */ |
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279 if ((M == 0) || (*(llc_data->n201_i) <= M - llc_data->irx->B_rx)) |
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280 { |
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281 *is_busy = FALSE; |
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282 } |
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283 else |
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284 { |
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285 *is_busy = TRUE; |
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286 } |
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287 } |
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288 else |
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289 { |
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290 /* |
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291 * Out of memory |
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292 */ |
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293 *is_busy = TRUE; |
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294 TRACE_ERROR( "Out of memory in irx_queue_store()" ); |
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295 PFREE (ll_unitdata_ind); |
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296 } |
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297 |
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298 } /* irx_queue_store() */ |
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299 |
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300 |
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301 /* |
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302 +------------------------------------------------------------------------------ |
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303 | Function : irx_update_vr |
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304 +------------------------------------------------------------------------------ |
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305 | Description : This procedure increments V(R) if the next following frames |
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306 | are already stored in the queue. |
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307 | |
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308 | Parameters : |
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309 | |
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310 +------------------------------------------------------------------------------ |
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311 */ |
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312 GLOBAL void irx_update_vr (void) |
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313 { |
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314 T_IRX_QUEUE* entry = llc_data->irx->queue; |
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315 |
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316 TRACE_FUNCTION( "irx_update_vr" ); |
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317 |
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318 /* |
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319 * Search the queue from the beginning to entry V(R) |
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320 */ |
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321 while (entry) |
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322 { |
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323 if (entry->ns == llc_data->sapi->vr) |
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324 { |
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325 /* |
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326 * Increment V(R) and continue searching |
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327 */ |
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328 llc_data->sapi->vr++; |
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329 |
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330 if (llc_data->sapi->vr > MAX_SEQUENCE_NUMBER) |
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331 { |
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332 llc_data->sapi->oc_i_rx += (MAX_SEQUENCE_NUMBER+1); |
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333 llc_data->sapi->vr = 0; |
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334 } |
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335 } |
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336 |
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337 entry = entry->next; |
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338 } |
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339 |
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340 } /* irx_update_vr() */ |
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341 |
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342 |
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343 /* |
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344 +------------------------------------------------------------------------------ |
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345 | Function : irx_get_last_queued_ns |
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346 +------------------------------------------------------------------------------ |
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347 | Description : This procedure returns the frame number of the last queue entry |
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348 | |
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349 | Parameters : *found - set to TRUE if ns found, FALSE otherwise |
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350 | |
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351 +------------------------------------------------------------------------------ |
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352 */ |
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353 GLOBAL void irx_get_last_queued_ns (BOOL *found, T_FRAME_NUM *num) |
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354 { |
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355 T_IRX_QUEUE* entry = llc_data->irx->queue; |
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356 |
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357 TRACE_FUNCTION( "irx_get_last_queued_ns" ); |
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358 |
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359 /* |
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360 * Search the queue from the beginning to last entry |
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361 */ |
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362 while (entry AND entry->next) |
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363 entry = entry->next; |
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364 |
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365 if (entry) |
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366 { |
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367 *found = TRUE; |
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368 *num = entry->ns; |
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369 } |
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370 else |
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371 { |
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372 *found = FALSE; |
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373 *num = 0; |
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374 } |
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375 |
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376 } /* irx_get_last_queued_ns() */ |
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377 |
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378 |
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379 /* |
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380 +------------------------------------------------------------------------------ |
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381 | Function : irx_queue_retrieve |
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382 +------------------------------------------------------------------------------ |
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383 | Description : If the next frame in sequence is stored in the queue then this |
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384 | procedure will return the primitive pointer, sets found to |
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385 | TRUE and removes the frame from the queue. |
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386 | |
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387 | Parameters : |
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388 | |
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389 +------------------------------------------------------------------------------ |
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390 */ |
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|
391 GLOBAL void irx_queue_retrieve (T_LL_UNITDATA_IND **ll_unitdata_ind, BOOL *found) |
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392 { |
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393 T_IRX_QUEUE** entry = &(llc_data->irx->queue); |
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394 |
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395 TRACE_FUNCTION( "irx_queue_retrieve" ); |
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396 |
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|
397 /* |
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398 * Take the first queue entry, if this is the next one (queue is sorted per ns) |
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399 */ |
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400 if ((*entry != NULL) && ((*entry)->ns == llc_data->irx->vf)) |
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401 { |
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402 /* |
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403 * Store pointer to the entry |
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404 */ |
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405 T_IRX_QUEUE* current = *entry; |
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|
406 |
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|
407 /* |
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408 * Remove entry from the queue (make second to first) |
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|
409 */ |
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|
410 *entry = current->next; |
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|
411 |
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|
412 *ll_unitdata_ind = current->frame; |
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|
413 |
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|
414 /* |
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|
415 * Decrease amount of stored Information in rx queue |
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416 */ |
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417 if (llc_data->irx->B_rx >= (ULONG)(BYTELEN((*ll_unitdata_ind)->sdu.l_buf))) |
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|
418 { |
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419 llc_data->irx->B_rx -= BYTELEN((*ll_unitdata_ind)->sdu.l_buf); |
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420 } |
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421 else |
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422 { |
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423 llc_data->irx->B_rx = 0; |
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424 TRACE_0_INFO("Unexpected SDU lenght handled"); |
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425 } |
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|
426 |
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|
427 /* |
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428 * Free retrieved entry |
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|
429 */ |
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430 MFREE (current); |
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|
431 |
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432 *found = TRUE; |
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|
433 |
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|
434 /* |
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|
435 * Increment V(f) (= Next frame number to forward to L3) |
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parents:
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436 */ |
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parents:
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|
437 llc_data->irx->vf += 1; |
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|
438 llc_data->irx->vf %= (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
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|
439 |
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parents:
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|
440 return; |
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|
441 } |
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|
442 |
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|
443 /* |
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parents:
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|
444 * Set default return values |
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parents:
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|
445 */ |
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446 *ll_unitdata_ind = NULL; |
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parents:
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447 *found = FALSE; |
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parents:
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|
448 } |
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|
449 |
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|
450 |
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parents:
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|
451 |
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parents:
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|
452 /* |
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parents:
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|
453 +------------------------------------------------------------------------------ |
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parents:
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|
454 | Function : irx_queue_clean |
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parents:
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|
455 +------------------------------------------------------------------------------ |
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parents:
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|
456 | Description : This procedure removes all entries from the IRX queue |
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parents:
diff
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|
457 | |
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parents:
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458 | Parameters : |
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parents:
diff
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|
459 | |
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parents:
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|
460 +------------------------------------------------------------------------------ |
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parents:
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|
461 */ |
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parents:
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|
462 GLOBAL void irx_queue_clean (void) |
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parents:
diff
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|
463 { |
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parents:
diff
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|
464 T_IRX_QUEUE** entry = &(llc_data->irx->queue); |
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parents:
diff
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|
465 |
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parents:
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|
466 TRACE_FUNCTION( "irx_queue_clean" ); |
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parents:
diff
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|
467 |
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parents:
diff
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|
468 while (*entry) |
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parents:
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|
469 { |
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parents:
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|
470 /* |
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parents:
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|
471 * get pointer to next (=first) entry |
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parents:
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|
472 */ |
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parents:
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|
473 T_IRX_QUEUE* current = *entry; |
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parents:
diff
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|
474 |
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parents:
diff
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|
475 /* |
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parents:
diff
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|
476 * Free frame, if one is attached to the entry |
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parents:
diff
changeset
|
477 */ |
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parents:
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|
478 if (current->frame != NULL) |
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parents:
diff
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|
479 { |
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parents:
diff
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|
480 PFREE (current->frame); |
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parents:
diff
changeset
|
481 } |
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parents:
diff
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|
482 |
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parents:
diff
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|
483 /* |
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parents:
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changeset
|
484 * remove next entry from the entry (make second to first) |
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parents:
diff
changeset
|
485 */ |
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parents:
diff
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|
486 *entry = current->next; |
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parents:
diff
changeset
|
487 |
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parents:
diff
changeset
|
488 /* |
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parents:
diff
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|
489 * free the removed entry |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
490 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
491 MFREE (current); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
492 } |
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parents:
diff
changeset
|
493 |
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parents:
diff
changeset
|
494 /* |
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parents:
diff
changeset
|
495 * Adjust amount of stored Information in rx queue |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
496 */ |
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parents:
diff
changeset
|
497 llc_data->irx->B_rx = 0; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
498 |
219afcfc6250
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parents:
diff
changeset
|
499 } /* irx_queue_clean() */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
500 |
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parents:
diff
changeset
|
501 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
502 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
503 /* |
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parents:
diff
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|
504 +------------------------------------------------------------------------------ |
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parents:
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|
505 | Function : irx_build_sack_bitmap |
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parents:
diff
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|
506 +------------------------------------------------------------------------------ |
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parents:
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changeset
|
507 | Description : This procedure builds a SACK bitmap, depending on current |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
508 | status |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
509 | |
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parents:
diff
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|
510 | Parameters : |
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parents:
diff
changeset
|
511 | |
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parents:
diff
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|
512 +------------------------------------------------------------------------------ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
513 */ |
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parents:
diff
changeset
|
514 GLOBAL void irx_build_sack_bitmap ( T_SACK_BITMAP *bitmap ) |
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parents:
diff
changeset
|
515 { |
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parents:
diff
changeset
|
516 T_IRX_QUEUE* entry = llc_data->irx->queue; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
517 int start_ns = (llc_data->sapi->vr + 1) % (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
changeset
|
518 T_FRAME_NUM num = llc_data->irx->vf; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
519 USHORT d; |
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parents:
diff
changeset
|
520 |
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parents:
diff
changeset
|
521 |
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parents:
diff
changeset
|
522 TRACE_FUNCTION( "irx_build_sack_bitmap" ); |
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parents:
diff
changeset
|
523 |
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parents:
diff
changeset
|
524 /* |
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parents:
diff
changeset
|
525 * Init bitmap to 0 (= frame not successfully received) |
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parents:
diff
changeset
|
526 */ |
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parents:
diff
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|
527 memset (bitmap, 0, sizeof(T_SACK_BITMAP)); |
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parents:
diff
changeset
|
528 |
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parents:
diff
changeset
|
529 /* |
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parents:
diff
changeset
|
530 * Skip already for L3 ready waiting entries |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
531 */ |
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parents:
diff
changeset
|
532 while (entry && entry->ns == num) |
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parents:
diff
changeset
|
533 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
534 num++; |
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parents:
diff
changeset
|
535 num %= (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
changeset
|
536 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
537 entry = entry->next; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
538 } |
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parents:
diff
changeset
|
539 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
540 |
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parents:
diff
changeset
|
541 /* |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
542 * Check the queue for successful received entries |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
543 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
544 while (entry) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
545 { |
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parents:
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|
546 /* |
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|
547 * If frame is successful received, mark it in bitmap |
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parents:
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|
548 */ |
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parents:
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|
549 d = FRAME_NUM_DISTANCE(start_ns, entry->ns); |
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parents:
diff
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|
550 |
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parents:
diff
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551 if (d < (S_FRAME_SACK_MAX_CTRL_OCTETS * 8)) |
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parents:
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|
552 { |
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parents:
diff
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|
553 bitmap->data[d>>3] |= 0x80>>(d%8); |
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parents:
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|
554 } |
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|
555 |
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parents:
diff
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|
556 entry = entry->next; |
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parents:
diff
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|
557 } |
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parents:
diff
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|
558 } /* irx_build_sack_bitmap () */ |
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parents:
diff
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|
559 |
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parents:
diff
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|
560 |
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parents:
diff
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|
561 /* |
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562 +------------------------------------------------------------------------------ |
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parents:
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563 | Function : irx_ack_all_to |
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parents:
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564 +------------------------------------------------------------------------------ |
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parents:
diff
changeset
|
565 | Description : This procedure handles the acknowledgement of transmitted I- |
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parents:
diff
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|
566 | frames from va to n (which is equal to nr -1) |
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parents:
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|
567 | Parameters : |
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diff
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|
568 | |
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parents:
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569 +------------------------------------------------------------------------------ |
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parents:
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|
570 */ |
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parents:
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|
571 GLOBAL void irx_ack_all_to (T_FRAME_NUM n) |
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parents:
diff
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|
572 { |
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parents:
diff
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|
573 TRACE_FUNCTION( "irx_ack_all_to" ); |
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parents:
diff
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|
574 |
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parents:
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|
575 n %= (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
changeset
|
576 |
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parents:
diff
changeset
|
577 if (FRAME_WIN_VALID(n, llc_data->sapi->va, *(llc_data->ku))) |
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parents:
diff
changeset
|
578 { |
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parents:
diff
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|
579 while (llc_data->sapi->va != (n+1)%(MAX_SEQUENCE_NUMBER+1)) |
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parents:
diff
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|
580 { |
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parents:
diff
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|
581 sig_irx_itx_ack_ind (TRUE, llc_data->sapi->va); |
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parents:
diff
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|
582 |
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parents:
diff
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|
583 llc_data->sapi->va++; |
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parents:
diff
changeset
|
584 llc_data->sapi->va %= (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
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|
585 } |
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parents:
diff
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|
586 |
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parents:
diff
changeset
|
587 /* |
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parents:
diff
changeset
|
588 * Sending L3 Data confirmations |
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parents:
diff
changeset
|
589 */ |
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parents:
diff
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|
590 sig_irx_itx_cnf_l3data_req (); |
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parents:
diff
changeset
|
591 } |
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parents:
diff
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|
592 |
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parents:
diff
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|
593 } /* irx_ack_all_to () */ |
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parents:
diff
changeset
|
594 |
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parents:
diff
changeset
|
595 |
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parents:
diff
changeset
|
596 /* |
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parents:
diff
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|
597 +------------------------------------------------------------------------------ |
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parents:
diff
changeset
|
598 | Function : irx_handle_sack |
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parents:
diff
changeset
|
599 +------------------------------------------------------------------------------ |
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parents:
diff
changeset
|
600 | Description : This procedure handles the acknowledge bits of a SACK |
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parents:
diff
changeset
|
601 | supervisory frame and strips the SACK bitmap from the SDU |
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parents:
diff
changeset
|
602 | |
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parents:
diff
changeset
|
603 | Parameters : |
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parents:
diff
changeset
|
604 | |
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parents:
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|
605 +------------------------------------------------------------------------------ |
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parents:
diff
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|
606 */ |
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parents:
diff
changeset
|
607 GLOBAL void irx_handle_sack (T_FRAME_NUM nr, |
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parents:
diff
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|
608 T_LL_UNITDATA_IND *ll_unitdata_ind, |
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parents:
diff
changeset
|
609 T_PDU_TYPE frame_type) |
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parents:
diff
changeset
|
610 { |
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parents:
diff
changeset
|
611 int i, n, bytes; |
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parents:
diff
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|
612 T_FRAME_NUM rn = 0; |
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parents:
diff
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|
613 T_SACK_BITMAP *bm; |
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parents:
diff
changeset
|
614 |
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parents:
diff
changeset
|
615 TRACE_FUNCTION( "irx_handle_sack" ); |
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parents:
diff
changeset
|
616 |
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parents:
diff
changeset
|
617 /* |
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parents:
diff
changeset
|
618 * Extract SACK bitmap and number of Ptr to bits from sdu: |
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parents:
diff
changeset
|
619 */ |
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parents:
diff
changeset
|
620 if (frame_type == I_FRAME) |
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parents:
diff
changeset
|
621 { |
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parents:
diff
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|
622 bm = (T_SACK_BITMAP*)&(ll_unitdata_ind->sdu.buf[ |
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parents:
diff
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|
623 (ll_unitdata_ind->sdu.o_buf >> 3) + 1]); |
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parents:
diff
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|
624 bytes = ll_unitdata_ind->sdu.buf[ |
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parents:
diff
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|
625 (ll_unitdata_ind->sdu.o_buf >> 3)] & 0xF1; |
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parents:
diff
changeset
|
626 } |
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parents:
diff
changeset
|
627 else |
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parents:
diff
changeset
|
628 { |
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parents:
diff
changeset
|
629 bm = (T_SACK_BITMAP*)&(ll_unitdata_ind->sdu.buf[ |
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parents:
diff
changeset
|
630 (ll_unitdata_ind->sdu.o_buf >> 3)]); |
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parents:
diff
changeset
|
631 bytes = ll_unitdata_ind->sdu.l_buf >> 3; |
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parents:
diff
changeset
|
632 } |
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parents:
diff
changeset
|
633 |
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parents:
diff
changeset
|
634 /* |
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parents:
diff
changeset
|
635 * Little Protection |
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parents:
diff
changeset
|
636 */ |
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parents:
diff
changeset
|
637 if ( bytes > S_FRAME_SACK_MAX_CTRL_OCTETS ) |
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parents:
diff
changeset
|
638 { |
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parents:
diff
changeset
|
639 bytes = S_FRAME_SACK_MAX_CTRL_OCTETS; |
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parents:
diff
changeset
|
640 TRACE_ERROR ("Illegal SACK bitmap size received"); |
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parents:
diff
changeset
|
641 } |
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parents:
diff
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|
642 |
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parents:
diff
changeset
|
643 /* |
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parents:
diff
changeset
|
644 * For each bit, which is set, send an acknowledge to ITX |
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parents:
diff
changeset
|
645 */ |
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parents:
diff
changeset
|
646 for (i = 0; i < bytes; i++) |
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parents:
diff
changeset
|
647 { |
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parents:
diff
changeset
|
648 for (n = 7; n >= 0; n--) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
649 { |
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parents:
diff
changeset
|
650 /* |
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parents:
diff
changeset
|
651 * first increment rn (must begin with 1) |
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parents:
diff
changeset
|
652 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
653 rn++; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
654 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
655 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
656 * check if bit is set from MSB to LSB |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
657 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
658 if ( bm->data[i] & (1 << n) ) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
659 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
660 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
661 * set frame acknowledged |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
662 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
663 sig_irx_itx_ack_ind ( TRUE, (T_FRAME_NUM)(nr + rn)); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
664 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
665 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
666 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
667 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
668 * mark frame for retransmission |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
669 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
670 sig_irx_itx_ack_ind ( FALSE, (T_FRAME_NUM)(nr + rn)); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
671 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
672 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
673 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
674 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
675 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
676 * send L3 data confirmation |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
677 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
678 sig_irx_itx_cnf_l3data_req (); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
679 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
680 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
681 * Strip SACK bitmap from I frame SDUs to get clean L3 PDU |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
682 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
683 if (frame_type == I_FRAME) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
684 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
685 ll_unitdata_ind->sdu.o_buf += bytes << 3; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
686 ll_unitdata_ind->sdu.l_buf -= bytes << 3; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
687 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
688 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
689 } /* irx_handle_sack () */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
690 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
691 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
692 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
693 +------------------------------------------------------------------------------ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
694 | Function : irx_send_ack |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
695 +------------------------------------------------------------------------------ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
696 | Description : This procedure handles the detection of sequence errors and |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
697 | the sending of appropriate acknowledgements |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
698 | |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
699 | Parameters : |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
700 | |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
701 +------------------------------------------------------------------------------ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
702 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
703 GLOBAL void irx_send_ack (T_BIT a_bit) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
704 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
705 TRACE_FUNCTION( "irx_send_ack" ); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
706 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
707 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
708 * Send S frame depending on last N(S) / V(R) condition |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
709 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
710 switch (llc_data->irx->last_ns) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
711 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
712 case NS_EQUAL_VR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
713 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
714 * Send an RR only, if requested |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
715 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
716 if (a_bit) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
717 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
718 sig_irx_itx_send_rr_req (ABIT_NO_REQ); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
719 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
720 else |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
721 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
722 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
723 * Trigger ITX to check queue and send frames |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
724 * This is done inside the other signals, too. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
725 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
726 sig_irx_itx_trigger_ind (); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
727 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
728 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
729 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
730 case NS_EQUAL_VR_PLUS_1: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
731 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
732 * Sequence error - one missing |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
733 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
734 sig_irx_itx_send_ack_req (ABIT_NO_REQ); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
735 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
736 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
737 case NS_NO_SEQUENCE_ERROR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
738 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
739 * Send an SACK only, if requested |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
740 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
741 if (a_bit) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
742 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
743 T_SACK_BITMAP bitmap; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
744 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
745 irx_build_sack_bitmap( &bitmap ); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
746 sig_irx_itx_send_sack_req (ABIT_NO_REQ, &bitmap); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
747 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
748 else |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
749 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
750 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
751 * Trigger ITX to check queue and send frames |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
752 * This is done inside the other signals, too. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
753 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
754 sig_irx_itx_trigger_ind (); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
755 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
756 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
757 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
758 default: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
759 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
760 * Sequence error - one or more missing |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
761 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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762 { |
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763 T_SACK_BITMAP bitmap; |
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764 |
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765 irx_build_sack_bitmap( &bitmap ); |
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766 sig_irx_itx_send_sack_req (ABIT_NO_REQ, &bitmap); |
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767 } |
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768 break; |
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769 } |
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770 |
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771 } /* irx_send_ack () */ |
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772 |
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773 |
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774 /* |
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775 +------------------------------------------------------------------------------ |
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776 | Function : irx_send_rnr |
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777 +------------------------------------------------------------------------------ |
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778 | Description : This procedure sends an RNR to ITX |
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779 | |
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780 | Parameters : |
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781 | |
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782 +------------------------------------------------------------------------------ |
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783 */ |
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784 GLOBAL void irx_send_rnr () |
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785 { |
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786 TRACE_FUNCTION( "irx_send_rnr" ); |
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787 |
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788 sig_irx_itx_send_rnr_req (ABIT_NO_REQ); |
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789 |
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790 } /* irx_send_rnr() */ |
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791 |
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792 |