FreeCalypso > hg > fc-magnetite
annotate src/g23m-gprs/llc/llc_irxl.c @ 225:b16d79c550a2
aci2: AT@SC bogon fully expunged
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 24 Oct 2016 05:50:25 +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 labels |
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18 | in the SDL-documentation (IRX-statemachine) that are called from |
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19 | more than one diagram/place. |
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20 +----------------------------------------------------------------------------- |
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21 */ |
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22 |
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23 #ifndef LLC_IRXL_C |
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24 #define LLC_IRXL_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_irxf.h" /* to get local IRX functions */ |
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42 #include "llc_irxl.h" /* to get local IRX labels */ |
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43 #include "llc_llmes.h" /* to get signal interface to LLME */ |
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44 #include "llc_txs.h" /* to get signal interface to TX */ |
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45 |
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46 /*==== CONST ================================================================*/ |
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47 |
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48 /*==== LOCAL VARS ===========================================================*/ |
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49 |
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50 /*==== PRIVATE FUNCTIONS ====================================================*/ |
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51 |
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52 |
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53 /* |
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54 +------------------------------------------------------------------------------ |
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55 | Function : irx_get_next_gap |
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56 +------------------------------------------------------------------------------ |
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57 | Description : Searches queue with already received frames. |
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58 | |
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59 | Parameters : next_free - pointer to T_FRAME_NUM, number of the next |
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60 | frame that has not been received yet. |
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61 | If queue is empty, this parameter will be |
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62 | set to (llc_data->sapi->vr + 1) % |
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63 | (MAX_SEQUENCE_NUMBER + 1). |
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64 | gap_size - pointer to T_FRAME_NUM, 0, 1 or bigger |
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65 | Preconditions: llc_data->sapi points to the affected sapi. |
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66 | There is 1 entry in the queue with vr==ns. |
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67 | |
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68 +------------------------------------------------------------------------------ |
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69 */ |
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70 GLOBAL void irx_get_next_gap (T_FRAME_NUM* next_free, |
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71 T_FRAME_NUM* gap_size) |
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72 { |
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73 |
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74 T_IRX_QUEUE* entry = llc_data->irx->queue; |
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75 BOOL gap_found = FALSE; |
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76 |
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77 TRACE_FUNCTION("irx_get_next_gap"); |
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78 |
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79 *next_free = (llc_data->sapi->vr + 1) % (MAX_SEQUENCE_NUMBER + 1); |
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80 *gap_size = 0; |
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81 |
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82 TRACE_EVENT_P1("*next_free: %d", *next_free); |
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83 |
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84 |
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85 while ((entry != NULL) && |
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86 FRAME_NUM_VALID( entry->ns, |
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87 llc_data->sapi->vr, |
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88 llc_data->sapi->vr + *(llc_data->ku)) ) |
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89 { |
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90 entry = entry->next; |
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91 } |
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92 |
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93 /* |
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94 * If rest of queue is empty, values of next_free and gap_size are ok. |
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95 */ |
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96 if (entry == NULL) |
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97 { |
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98 return; |
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99 } /* if (entry == NULL) */ |
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100 |
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101 /* |
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102 * Queue is not empty. Find the first gap. |
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103 */ |
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104 while ((entry != NULL) && !gap_found) |
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105 { |
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106 T_FRAME_NUM num = entry->ns; |
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107 |
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108 if (num == *next_free) |
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109 { |
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110 entry = entry->next; |
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111 *next_free = (*next_free + 1) % (MAX_SEQUENCE_NUMBER + 1); |
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112 } |
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113 else |
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114 { |
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115 gap_found = TRUE; |
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116 *gap_size = (num - *next_free) % (MAX_SEQUENCE_NUMBER + 1); |
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117 } |
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118 } /* while ((entry != NULL) && !gap_found) */ |
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119 |
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120 TRACE_EVENT_P2("*next_free: %u *gap_size: %u ", *next_free, *gap_size); |
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121 |
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122 |
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123 } /* irx_get_next_gap() */ |
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124 |
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125 |
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126 |
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127 |
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128 |
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129 |
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130 |
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131 /*==== PUBLIC FUNCTIONS =====================================================*/ |
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132 |
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133 |
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134 /* |
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135 +------------------------------------------------------------------------------ |
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136 | Function : irx_label_if |
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137 +------------------------------------------------------------------------------ |
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138 | Description : Describes label IRX_IF |
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139 | |
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140 | Parameters : ll_unitdata_ind - a valid pointer to an LL_UNITDATA_IND |
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141 | primitive |
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142 | ns - N(S) of received frame |
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143 | a_bit - A bit of received frame |
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144 | state - current state of IRX |
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145 | |
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146 +------------------------------------------------------------------------------ |
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147 */ |
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148 GLOBAL void irx_label_if (T_LL_UNITDATA_IND *ll_unitdata_ind, |
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149 T_FRAME_NUM ns, |
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150 T_BIT a_bit, |
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151 UBYTE state) |
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152 { |
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153 BOOL is_busy; |
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154 T_FRAME_NUM vsi; |
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155 BOOL vsi_found; |
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156 |
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157 |
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158 TRACE_FUNCTION( "irx_label_if" ); |
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159 |
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160 if (state == IRX_ABM) |
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161 { |
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162 /* |
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163 * Label IRX_IF_ABM |
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164 */ |
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165 if ( ns == llc_data->sapi->vr ) |
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166 { |
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167 BOOL found = FALSE; |
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168 T_FRAME_NUM num = 0; |
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169 irx_get_last_queued_ns(&found, &num); |
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170 if (!found) |
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171 { |
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172 /* |
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173 * Store N(S)/V(R) condition |
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174 */ |
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175 llc_data->irx->last_ns = NS_EQUAL_VR; |
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176 /* |
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177 * If N(s) = V(r) increment V(r), handle OC(rx) |
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178 */ |
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179 llc_data->sapi->vr++; |
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180 |
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181 if (llc_data->sapi->vr > MAX_SEQUENCE_NUMBER) |
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182 { |
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183 llc_data->sapi->oc_i_rx += (MAX_SEQUENCE_NUMBER+1); |
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184 llc_data->sapi->vr = 0; |
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185 } |
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186 } |
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187 else |
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188 { |
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189 |
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190 T_FRAME_NUM next_free = 0; |
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191 T_FRAME_NUM gap_size = 0; |
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192 |
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193 irx_get_next_gap (&next_free, &gap_size); |
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194 |
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195 /* |
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196 * vr will be set to next_free. If MAX_SEQUENCE_NUMBER is passed, |
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197 * increment overflow counter. |
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198 */ |
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199 if (llc_data->sapi->vr > next_free) |
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200 { |
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201 llc_data->sapi->oc_i_rx += (MAX_SEQUENCE_NUMBER + 1); |
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202 } |
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203 |
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204 llc_data->sapi->vr = next_free; |
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205 |
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206 if (gap_size == 0) { |
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207 llc_data->irx->last_ns = NS_EQUAL_VR; |
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208 } else if (gap_size == 1) { |
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209 llc_data->irx->last_ns = NS_EQUAL_VR_PLUS_1; |
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210 } else { |
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211 llc_data->irx->last_ns = NS_NO_SEQUENCE_ERROR; |
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212 } |
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parents:
diff
changeset
|
213 |
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parents:
diff
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|
214 } |
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parents:
diff
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|
215 |
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parents:
diff
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|
216 /* |
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parents:
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|
217 * Expected next frame received. |
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parents:
diff
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|
218 */ |
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parents:
diff
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|
219 if ( llc_data->irx->ll_send_ready == TRUE ) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
220 { |
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parents:
diff
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|
221 /* |
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parents:
diff
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|
222 * Forward the frame to L3 |
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parents:
diff
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|
223 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
224 PPASS (ll_unitdata_ind, ll_data_ind, LL_DATA_IND); |
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parents:
diff
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|
225 TRACE_2_OUT_PARA("s:%d len:%d", ll_data_ind->sapi, BYTELEN(ll_data_ind->sdu.l_buf)); |
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parents:
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|
226 PSEND (hCommSNDCP, ll_data_ind); |
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parents:
diff
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227 |
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parents:
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|
228 llc_data->irx->ll_send_ready = FALSE; |
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parents:
diff
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|
229 |
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parents:
diff
changeset
|
230 /* |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
231 * Increment V(f) (= Next frame number to forward to L3) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
232 */ |
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parents:
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|
233 llc_data->irx->vf += 1; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
234 llc_data->irx->vf %= (MAX_SEQUENCE_NUMBER+1); |
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parents:
diff
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|
235 |
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parents:
diff
changeset
|
236 /* |
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parents:
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|
237 * Update V(R) if we have the next frames already queued |
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parents:
diff
changeset
|
238 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
239 irx_update_vr (); |
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parents:
diff
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|
240 |
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parents:
diff
changeset
|
241 /* |
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parents:
diff
changeset
|
242 * Handle the acknowledgement |
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parents:
diff
changeset
|
243 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
244 irx_send_ack (a_bit); |
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parents:
diff
changeset
|
245 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
246 /* SET_STATE (IRX, SAME_STATE); */ |
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parents:
diff
changeset
|
247 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
248 else |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
249 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
250 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
251 * store frame and update V(R) if next frames already stored |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
252 */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
253 irx_queue_store (ll_unitdata_ind, ns, &is_busy); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
254 irx_update_vr (); |
219afcfc6250
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parents:
diff
changeset
|
255 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
256 if ( is_busy == TRUE ) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
257 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
258 irx_send_rnr (); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
259 SET_STATE (IRX, IRX_ABM_BUSY); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
260 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
261 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
262 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
263 irx_send_ack (a_bit); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
264 /* SET_STATE (IRX, SAME_STATE); */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
265 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
266 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
267 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
268 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
269 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
270 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
271 * Not the expected next frame received. Check if it is in receive window. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
272 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
273 if ( FRAME_NUM_VALID (llc_data->sapi->vr + 1, ns, llc_data->sapi->vr + *(llc_data->ku)) ) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
274 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
275 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
276 * Store N(S)/V(R) condition |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
277 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
278 if (ns == (llc_data->sapi->vr + 1) % (MAX_SEQUENCE_NUMBER+1)) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
279 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
280 llc_data->irx->last_ns = NS_EQUAL_VR_PLUS_1; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
281 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
282 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
283 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
284 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
285 * Check if we have detect a sequence error or not: If ns equals to |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
286 * ns + 1 of the last queued frame then we have not detect a new error |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
287 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
288 irx_get_last_queued_ns (&vsi_found, &vsi); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
289 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
290 if (vsi_found) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
291 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
292 if (ns == (vsi + 1) % (MAX_SEQUENCE_NUMBER+1)) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
293 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
294 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
295 * ok, seems to be in sequence |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
296 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
297 llc_data->irx->last_ns = NS_NO_SEQUENCE_ERROR; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
298 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
299 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
300 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
301 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
302 * sequence error found |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
303 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
304 llc_data->irx->last_ns = NS_IN_RANGE_VR_KU; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
305 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
306 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
307 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
308 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
309 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
310 * sequence error found |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
311 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
312 llc_data->irx->last_ns = NS_IN_RANGE_VR_KU; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
313 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
314 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
315 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
316 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
317 * store frame and update V(R) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
318 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
319 irx_queue_store (ll_unitdata_ind, ns, &is_busy); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
320 |
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321 if ( is_busy == TRUE ) |
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322 { |
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323 irx_send_rnr (); |
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324 SET_STATE (IRX, IRX_ABM_BUSY); |
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325 } |
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326 else |
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327 { |
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328 irx_send_ack (a_bit); |
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329 /* SET_STATE (IRX, SAME_STATE); */ |
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330 } |
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331 } |
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332 else |
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333 { |
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334 /* |
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335 * duplicate frame |
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336 */ |
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337 TRACE_0_INFO ("Duplicated frame received"); |
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338 |
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339 PFREE (ll_unitdata_ind); |
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340 irx_send_ack (a_bit); |
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341 /* SET_STATE (IRX, SAME_STATE); */ |
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342 } |
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343 } |
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344 } |
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345 else |
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346 { |
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347 /* |
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348 * ABM_BUSY |
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349 */ |
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350 irx_send_rnr (); |
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351 |
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352 /* |
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353 * ignore I frame in state 'own receiver busy' |
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354 */ |
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355 PFREE (ll_unitdata_ind); |
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356 /* SET_STATE (IRX, SAME_STATE); */ |
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357 } |
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358 |
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359 return; |
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360 } /* irx_label_if() */ |
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|
361 |