FreeCalypso > hg > fc-magnetite
annotate src/g23m-gprs/llc/llc_rxf.c @ 625:916b27af1c6c
Leonardo target: compacted linker script template
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 22 Dec 2019 23:24:44 +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 (RX-statemachine) |
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20 +----------------------------------------------------------------------------- |
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21 */ |
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22 |
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23 #ifndef LLC_RXF_C |
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24 #define LLC_RXF_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> /* to get memcpy() */ |
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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_rxf.h" /* to get local defines */ |
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44 #include "llc_rxp.h" /* to get the function rx_cci_decipher_cnf */ |
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45 #include "llc_f.h" /* to get global functions, e.g. llc_generate_input */ |
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46 #ifndef TI_PS_OP_CIPH_DRIVER |
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47 #include "cci_fbsf.h" /* to get functional interface */ |
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48 #endif |
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49 /*==== CONST ================================================================*/ |
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50 |
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51 /*==== LOCAL VARS ===========================================================*/ |
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52 |
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53 /*==== PRIVATE FUNCTIONS ====================================================*/ |
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54 #ifndef CF_FAST_EXEC |
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55 |
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56 GLOBAL UBYTE rx_get_desc_octet (T_desc_list *desc_list, |
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57 USHORT offset, |
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58 UBYTE *data_ptr); |
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59 #endif /* CF_FAST_EXEC */ |
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60 |
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61 /*==== PUBLIC FUNCTIONS =====================================================*/ |
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62 |
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63 |
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64 /* |
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65 +------------------------------------------------------------------------------ |
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66 | Function : rx_init |
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67 +------------------------------------------------------------------------------ |
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68 | Description : This procedure initialises all necessary variables of |
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69 | receive_pdu. |
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70 | |
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71 | Parameters : |
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72 | |
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73 +------------------------------------------------------------------------------ |
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74 */ |
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75 #ifndef CF_FAST_EXEC |
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76 |
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77 GLOBAL void rx_init (void) |
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78 { |
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79 TRACE_FUNCTION( "rx_init" ); |
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80 |
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81 /* |
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82 * Initialise service RX with state TLLI_UNASSIGNED. |
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83 */ |
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84 INIT_STATE (RX, RX_TLLI_UNASSIGNED); |
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85 |
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86 return; |
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87 } /* rx_init() */ |
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88 |
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89 #endif /* CF_FAST_EXEC */ |
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90 |
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91 |
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92 /* |
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93 +------------------------------------------------------------------------------ |
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94 | Function : rx_analyse_ctrl_field |
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95 +------------------------------------------------------------------------------ |
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96 | Description : This procedure analyses the received LLC frame control field |
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97 | and sets frame_type according to the frame type (U, UI, I/S). |
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98 | protected_mode is set according to the protected mode of the |
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99 | frame (U and I/S always protected, UI depends on setting of |
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100 | PM bit). The type of protected_mode is the same as in |
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101 | CCI_DECIPHER_REQ. ns is set to N(S) for I frames, N(U) for |
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102 | UI frames, or an undefined value for S and U frames. ciphering |
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103 | is set to TRUE if the frame is ciphered (U never, I/S always, |
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104 | UI depends on setting of E bit), otherwise to FALSE. frame_ok |
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105 | indicates if the frame contains enough octets to contain a |
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106 | known control field (i.e. all necessary information is |
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107 | accessible, not the control field is complete!). |
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108 | |
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109 | Parameters : grlc_unitdata_ind - a valid pointer to a GRLC_UNITDATA_IND |
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110 | primitive |
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111 | frame_type - a valid pointer to a T_PDU_TYPE variable |
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112 | protected_mode - a valid pointer to a UBYTE variable |
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113 | sapi - a valid pointer to a UBYTE variable |
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114 | ns - a valid pointer to a T_FRAME_NUM variable |
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115 | ciphering - a valid pointer to a BOOL variable |
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116 | header_size - a valid pointer to a USHORT variable |
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117 | frame_ok - a valid pointer to a BOOL variable |
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118 | |
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119 +------------------------------------------------------------------------------ |
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120 */ |
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121 |
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122 #ifndef CF_FAST_EXEC |
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123 |
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124 GLOBAL void rx_analyse_ctrl_field (T_GRLC_UNITDATA_IND *grlc_unitdata_ind, |
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125 T_PDU_TYPE *frame_type, |
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126 UBYTE *protected_mode, |
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127 UBYTE *sapi, |
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128 T_FRAME_NUM *ns, |
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129 BOOL *ciphering, |
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130 USHORT *header_size, |
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131 BOOL *frame_ok) |
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132 { |
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133 UBYTE first_octet; |
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134 UBYTE sec_octet; |
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135 UBYTE command_octet; |
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136 UBYTE sack_k_octet; |
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137 |
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138 |
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139 TRACE_FUNCTION( "rx_analyse_ctrl_field" ); |
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140 |
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141 /* |
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142 * Check if the frame contains enough octets to access the first octet of |
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143 * the control field to find out the type of the frame. |
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144 */ |
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145 if (grlc_unitdata_ind->desc_list.list_len < CTRL_MIN_OCTETS) |
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146 { |
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147 *frame_ok = FALSE; |
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148 return; |
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149 } |
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150 |
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151 /* |
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152 * Assume initially that the frame is ok. |
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153 */ |
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154 *frame_ok = TRUE; |
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155 |
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156 /* |
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157 * Set first_octet to the value of the first frame octet (offset 0), which |
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158 * is the address field. |
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159 */ |
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160 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 0, &first_octet); |
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161 |
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162 *sapi = first_octet & 0x0F; |
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163 |
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164 /* |
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165 * Set sec_octet to the value of the second frame octet (offset 1), which |
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166 * is the first octet of the control field. |
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167 */ |
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168 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 1, &sec_octet); |
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169 |
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170 |
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171 /* |
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172 * Determine frame_type, along with ns, protected_mode, and ciphering, |
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173 * depending on the frame type. |
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174 */ |
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175 if ((sec_octet & I_FRAME_MASK) EQ I_FRAME_ID) |
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176 { |
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177 /* |
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178 * I frame, protected, ciphered, at least 4 octets required to access all |
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179 * requested information (1 Address, 3 Control). |
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180 */ |
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181 *frame_type = I_FRAME; |
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182 *protected_mode = CCI_PM_PROTECTED; |
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183 *ciphering = TRUE; |
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184 |
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185 /* |
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186 * Check if the frame contains enough octets to access the complete |
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187 * I frame control field. |
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188 */ |
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189 if (grlc_unitdata_ind->desc_list.list_len < I_CTRL_MIN_OCTETS) |
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190 { |
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191 *frame_ok = FALSE; |
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192 return; |
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193 } |
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194 |
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195 /* |
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196 * Determine the header_size |
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197 */ |
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198 *header_size = I_CTRL_MIN_OCTETS; |
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199 |
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200 /* |
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201 * Add bytes in case of SACK-Bitmap (add K+1). Therefore get at first |
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202 * the command octet (offset 3). In case of an SACK, get next the k |
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203 * octet (offset 4) and add the additional size. |
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204 */ |
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205 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 3, &command_octet); |
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206 |
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207 if ( (command_octet & 0x03) == I_FRAME_SACK ) |
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208 { |
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209 *header_size += 1; /* k octet */ |
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210 |
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211 if (grlc_unitdata_ind->desc_list.list_len < *header_size) |
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212 { |
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213 *frame_ok = FALSE; |
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214 return; |
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215 } |
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216 |
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217 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 4, &sack_k_octet); |
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218 |
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219 *header_size += (sack_k_octet & 0x1F); /* bitmap size */ |
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220 |
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221 if (grlc_unitdata_ind->desc_list.list_len < *header_size) |
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222 { |
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223 *frame_ok = FALSE; |
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224 return; |
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225 } |
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226 } |
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227 |
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228 /* |
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229 * Extract N(S) and store it in ns. |
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230 */ |
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231 *ns = (((T_FRAME_NUM) |
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232 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 1, NULL)) & 0x1F) << 4; |
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233 *ns |= (((T_FRAME_NUM) |
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234 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 2, NULL)) >> 4); |
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235 } |
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236 else if ((sec_octet & S_FRAME_MASK) EQ S_FRAME_ID) |
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237 { |
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238 /* |
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239 * S frame, protected, not ciphered. No N(S) present, only N(R). |
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240 */ |
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241 *frame_type = S_FRAME; |
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242 *protected_mode = CCI_PM_PROTECTED; |
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243 *ciphering = FALSE; |
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244 |
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245 *header_size = S_CTRL_MIN_OCTETS; |
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246 |
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247 /* not necessary to add bytes in case of SACK - value is not used */ |
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248 } |
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249 else if ((sec_octet & UI_FRAME_MASK) EQ UI_FRAME_ID) |
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250 { |
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251 /* |
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252 * UI frame, at least 3 octets required to access all requested |
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253 * information (1 Address, 2 Control). |
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254 */ |
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255 *frame_type = UI_FRAME; |
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256 |
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257 /* |
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258 * Check if the frame contains enough octets to access the complete |
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259 * UI frame control field. |
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260 */ |
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261 if (grlc_unitdata_ind->desc_list.list_len < UI_CTRL_MIN_OCTETS) |
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|
262 { |
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263 *frame_ok = FALSE; |
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264 return; |
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|
265 } |
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266 |
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267 /* |
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268 * Extract protected mode setting of frame (PM bit). |
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|
269 */ |
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270 if (rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 2, NULL) & 0x01) |
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|
271 { |
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272 *protected_mode = CCI_PM_PROTECTED; |
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|
273 } |
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274 else |
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|
275 { |
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276 *protected_mode = CCI_PM_UNPROTECTED; |
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277 } |
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278 |
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279 /* |
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280 * Extract ciphering setting of frame (E bit). |
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|
281 */ |
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282 if (rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 2, NULL) & 0x02) |
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|
283 { |
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284 *ciphering = TRUE; |
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|
285 } |
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286 else |
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|
287 { |
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288 *ciphering = FALSE; |
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|
289 } |
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|
290 |
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291 *header_size = UI_CTRL_MIN_OCTETS; |
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|
292 |
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293 /* |
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294 * Extract N(U) and store it in ns. |
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|
295 */ |
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296 *ns = (((T_FRAME_NUM) |
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|
297 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 1, NULL)) & 0x07) << 6; |
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298 *ns |= (((T_FRAME_NUM) |
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299 rx_get_desc_octet (&grlc_unitdata_ind->desc_list, 2, NULL)) >> 2); |
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|
300 } |
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301 else if ((sec_octet & U_FRAME_MASK) EQ U_FRAME_ID) |
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|
302 { |
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|
303 /* |
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|
304 * U frame, protected, not ciphered. No N(S) present. |
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|
305 */ |
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306 *frame_type = U_FRAME; |
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307 *protected_mode = CCI_PM_PROTECTED; |
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308 *ciphering = FALSE; |
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|
309 |
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|
310 *header_size = U_CTRL_MIN_OCTETS; |
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|
311 } |
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|
312 |
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313 return; |
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|
314 } /* rx_analyse_ctrl_field() */ |
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diff
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|
315 |
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|
316 #endif /* CF_FAST_EXEC */ |
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|
317 |
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diff
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318 /* |
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319 +------------------------------------------------------------------------------ |
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320 | Function : rx_decipher_req |
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321 +------------------------------------------------------------------------------ |
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322 | Description : Handles the function rx_decipher_req. This functions sets the |
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323 | ciphering parameters and calls the deciphering driver function. |
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324 | |
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325 | Parameters : |
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326 | |
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327 +------------------------------------------------------------------------------ |
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328 */ |
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329 |
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330 #ifndef CF_FAST_EXEC |
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331 GLOBAL void rx_decipher_req (T_CCI_DECIPHER_REQ *decipher_req) |
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332 { |
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333 T_CIPH_init_cipher_req_parms init_cipher_req_parms; |
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334 T_CIPH_cipher_req_parms cipher_req_parms; |
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335 T_CIPH_in_data_list in_data_list; |
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336 T_CIPH_out_data out_data; |
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337 T_CIPH_ck ck; |
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338 U16 i; |
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339 U8 status; |
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340 U16 cnt = 0; |
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341 |
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342 TRACE_FUNCTION( "rx_decipher_req" ); |
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343 |
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344 #ifdef LLC_TRACE_CIPHERING |
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345 TRACE_EVENT("DOWNLINK CIPHERED DATA"); |
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346 llc_trace_desc_list(&decipher_req->desc_list); |
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347 #endif |
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348 |
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349 /* |
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350 * Copy pointer to desc's from CIPHER_REQ to the in_data_list |
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351 * The in_data array in allocated dynamically in this func. |
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352 */ |
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353 llc_copy_dl_data_to_list(decipher_req, &in_data_list); |
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354 /* |
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355 * Set ciphering parameters |
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356 */ |
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357 cipher_req_parms.gprs_parameters.pm = decipher_req->pm; |
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358 cipher_req_parms.gprs_parameters.header_size = decipher_req->header_size; |
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359 cipher_req_parms.gprs_parameters.ciphering_input = |
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360 decipher_req->ciphering_input; |
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361 cipher_req_parms.gprs_parameters.threshold = 0; |
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362 init_cipher_req_parms.direction = CIPH_DOWNLINK_DIR; |
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363 init_cipher_req_parms.algo = decipher_req->ciphering_algorithm; |
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364 init_cipher_req_parms.ptr_ck = & ck; |
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365 /* |
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366 * Copy ciphering key |
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367 */ |
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368 for (i = 0; i < 8;i++) { |
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369 init_cipher_req_parms.ptr_ck->ck_element[i] = decipher_req->kc.key[i]; |
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370 } |
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371 |
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372 { |
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373 /* Use GRLC_DATA_REQ instead of CCI_CIPHER_CNF to avoid PPASS in LLC*/ |
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374 PALLOC_SDU (ll_unitdata_ind, LL_UNITDATA_IND, |
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375 (USHORT)((decipher_req->desc_list.list_len*8) - FCS_SIZE_BITS)); |
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376 |
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377 ll_unitdata_ind->sdu.o_buf = 0; |
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378 ll_unitdata_ind->sdu.l_buf = 0; |
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379 out_data.buf = |
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380 (U32)(&ll_unitdata_ind->sdu.buf[ll_unitdata_ind->sdu.o_buf >> 3]); |
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381 /* |
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382 * Initialize ciphering driver and decipher data |
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383 */ |
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384 #ifdef TI_PS_OP_CIPH_DRIVER |
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385 ciph_init_cipher_req (&init_cipher_req_parms, NULL); |
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386 ciph_cipher_req (&cipher_req_parms, &in_data_list, &out_data, &status); |
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387 #else |
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388 ciph_init_cipher_req_sim (&init_cipher_req_parms, NULL); |
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389 ciph_cipher_req_sim (&cipher_req_parms, &in_data_list, &out_data, &status); |
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390 #endif |
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391 /* |
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392 * "Send" DECIPHER_CNF to LLC |
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393 */ |
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394 ll_unitdata_ind->sdu.l_buf = out_data.len * 8; |
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395 ll_unitdata_ind->tlli = decipher_req->reference1; |
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396 ll_unitdata_ind->cipher = (UBYTE)decipher_req->reference2; |
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397 if (status == CIPH_CIPH_PASS){ |
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398 ll_unitdata_ind->sapi = CCI_FCS_PASSED; |
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399 } else { |
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400 ll_unitdata_ind->sapi = CCI_FCS_FAILED; |
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401 } |
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402 |
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403 #ifdef LLC_TRACE_CIPHERING |
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404 TRACE_EVENT("DOWNLINK DECIPHERED DATA"); |
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405 llc_trace_sdu(&ll_unitdata_ind->sdu); |
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406 #endif |
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407 rx_cci_decipher_cnf(ll_unitdata_ind); |
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408 } |
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409 /* |
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410 * Free in_data array from in_data_list allocated in llc_copy_dl_data_to_list |
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411 */ |
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412 if(in_data_list.ptr_in_data != NULL){ |
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413 MFREE(in_data_list.ptr_in_data); |
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414 in_data_list.ptr_in_data = NULL; |
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415 } |
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416 /* |
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417 * Free descriptors from the deipher_req->desc_list |
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418 */ |
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419 if (decipher_req != NULL) |
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420 { |
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421 T_desc *desc = (T_desc *)decipher_req->desc_list.first; |
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422 T_desc *next_desc; |
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423 while (desc NEQ NULL){ |
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424 next_desc = (T_desc *)desc->next; |
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425 MFREE (desc); |
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426 desc = next_desc; |
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427 /* increase freed partitions counter */ |
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428 cnt++; |
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429 } |
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430 MFREE(decipher_req); |
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431 decipher_req = NULL; |
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432 } |
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433 llc_data->fbs.cci_freed_partition +=cnt; |
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|
434 |
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435 /* trace number of freed partitions */ |
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436 if(llc_data->fbs.cci_info_trace){ |
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437 TRACE_EVENT_P2("INFO CCI: freed partitions %ld, total=%ld", |
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438 cnt,llc_data->fbs.cci_freed_partition); |
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439 } |
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440 |
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441 } /* rx_decipher_req */ |
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442 |
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443 #endif |
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444 |
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445 /* |
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446 +------------------------------------------------------------------------------ |
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447 | Function : rx_send_decipher_req |
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448 +------------------------------------------------------------------------------ |
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449 | Description : This procedure allocates the CCI_DECIPHER_REQ primitive, fills |
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450 | in all necessary parameters and sends the primitive to CCI. |
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451 | |
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452 | Parameters : grlc_unitdata_ind - a valid pointer to a GRLC_UNITDATA_IND |
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453 | primitive |
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454 | frame_type - indicates (un)acknowledged operation mode |
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455 | protected_mode - pm setting for CCI_DECIPHER_REQ |
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456 | ns - N(S)/N(U) for deciphering, otherwise |
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457 | undefined value |
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458 | header_size - size of header bytes (not ciphered bytes) |
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459 | ciphering - indicates deciphering (TRUE/FALSE) |
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460 | |
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461 +------------------------------------------------------------------------------ |
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462 */ |
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463 #ifndef CF_FAST_EXEC |
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|
464 |
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465 GLOBAL void rx_send_decipher_req (T_GRLC_UNITDATA_IND *grlc_unitdata_ind, |
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466 T_PDU_TYPE frame_type, |
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467 UBYTE protected_mode, |
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|
468 T_FRAME_NUM ns, |
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|
469 USHORT header_size, |
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|
470 BOOL ciphering) |
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|
471 { |
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472 ULONG oc; |
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|
473 |
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|
474 TRACE_FUNCTION ("rx_send_decipher_req"); |
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|
475 |
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|
476 { |
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parents:
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|
477 /* |
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parents:
diff
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|
478 * No need to PPASS GRLC_xDATA_IND, because desc_list contains a pointer |
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479 * which can be simply copied. |
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|
480 */ |
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diff
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|
481 T_CCI_DECIPHER_REQ *cci_decipher_req; |
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|
482 MALLOC(cci_decipher_req, sizeof(T_CCI_DECIPHER_REQ)); |
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parents:
diff
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|
483 |
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parents:
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|
484 /* |
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parents:
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|
485 * Requires rx_analyse_ctrl_field() to set a correct CCI value. |
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|
486 */ |
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|
487 cci_decipher_req->pm = protected_mode; |
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|
488 |
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|
489 if (ciphering EQ TRUE) |
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parents:
diff
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|
490 { |
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parents:
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|
491 cci_decipher_req->reference2 = LL_CIPHER_ON; /* re-use of reference is ok */ |
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|
492 cci_decipher_req->ciphering_algorithm = llc_data->ciphering_algorithm; |
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|
493 memcpy (&cci_decipher_req->kc, &llc_data->kc, sizeof(T_kc)); |
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|
494 |
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|
495 /* |
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|
496 * Calculate the OC which is valid for this ns. This could be the |
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|
497 * current OC or OC + 1 in case of an modulo overflow of ns |
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|
498 */ |
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|
499 switch (frame_type) |
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|
500 { |
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|
501 case I_FRAME: |
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|
502 case S_FRAME: |
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|
503 if (ns >= llc_data->sapi->vr) |
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|
504 oc = llc_data->sapi->oc_i_rx; |
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|
505 else |
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|
506 oc = llc_data->sapi->oc_i_rx + (MAX_SEQUENCE_NUMBER+1); |
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changeset
|
507 break; |
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parents:
diff
changeset
|
508 |
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changeset
|
509 default: |
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changeset
|
510 if (ns >= llc_data->sapi->vur) |
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changeset
|
511 oc = llc_data->sapi->oc_ui_rx; |
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diff
changeset
|
512 else |
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changeset
|
513 oc = llc_data->sapi->oc_ui_rx + (MAX_SEQUENCE_NUMBER+1); |
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|
514 break; |
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parents:
diff
changeset
|
515 } |
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|
516 |
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diff
changeset
|
517 llc_generate_input (llc_data->current_sapi, frame_type, ns, |
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diff
changeset
|
518 &cci_decipher_req->ciphering_input, oc); |
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diff
changeset
|
519 |
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changeset
|
520 cci_decipher_req->direction = CCI_DIRECTION_DOWNLINK; |
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parents:
diff
changeset
|
521 } |
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parents:
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|
522 else /* ciphering EQ FALSE */ |
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diff
changeset
|
523 { |
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parents:
diff
changeset
|
524 cci_decipher_req->reference2 = LL_CIPHER_OFF; |
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|
525 cci_decipher_req->ciphering_algorithm = CCI_CIPHER_NO_ALGORITHM; |
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parents:
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changeset
|
526 } |
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527 |
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528 cci_decipher_req->header_size = header_size; |
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529 |
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|
530 /* |
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|
531 * TLLI must be stored somewhere |
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532 */ |
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533 cci_decipher_req->reference1 = grlc_unitdata_ind->tlli; |
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534 |
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535 cci_decipher_req->desc_list = grlc_unitdata_ind->desc_list; |
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536 |
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537 /* TRACE_EVENT ("CCI thread not available, using functional interface"); */ |
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538 |
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|
539 rx_decipher_req(cci_decipher_req); |
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|
540 } |
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|
541 |
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542 return; |
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543 } /* rx_send_decipher_req() */ |
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544 |
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545 #endif /* CF_FAST_EXEC */ |
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546 |
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547 /* |
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548 +------------------------------------------------------------------------------ |
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549 | Function : rx_interpret_frame |
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550 +------------------------------------------------------------------------------ |
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551 | Description : This procedure analyses the LLC header and checksum of the |
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552 | given frame (U, UI, or I) and sets sapi, pdu_type, command, |
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diff
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553 | cr_bit, pf_bit, nr, and ns accordingly. The FCS field is not |
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554 | included in frame, it has already been stripped off. frame_ok |
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|
555 | is set to TRUE if the frame fulfils the following requirements: |
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parents:
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556 | known PDU type, valid length, valid PD bit, valid SAPI. |
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parents:
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|
557 | frame_rej indicates a frame rejection condition if any bit of |
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parents:
diff
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|
558 | W4-W1 is set. If a frame is rejected, frame_rej_ctrl_length |
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parents:
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|
559 | indicates the length of the control field. If this length |
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parents:
diff
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|
560 | could not be determined, frame_rej_ctrl_length is set to the |
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parents:
diff
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561 | number of control field octets of the frame. |
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parents:
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|
562 | |
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parents:
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|
563 | Parameters : frame - contains the frame to be analysed, must be |
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parents:
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564 | a valid pointer |
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|
565 | sapi - will be set to the SAPI of the frame, must be |
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parents:
diff
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|
566 | a valid pointer |
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parents:
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|
567 | pdu_type - will be set to the PDU type of the frame, must be |
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parents:
diff
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|
568 | a valid pointer |
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parents:
diff
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|
569 | command - will be set to the command (I/S, U) of the frame |
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diff
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|
570 | (if available), must be a valid pointer |
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parents:
diff
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|
571 | cr_bit - will be set to the C/R bit of the frame, must be |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
572 | a valid pointer |
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parents:
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|
573 | pf_bit - will be set to the P/F bit of the frame (if |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
574 | available), must be a valid pointer |
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parents:
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575 | nr - will be set to N(R) / N(U) of the frame (if |
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parents:
diff
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|
576 | available), must be a valid pointer |
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parents:
diff
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|
577 | ns - will be set to N(S) of the frame (if available), |
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parents:
diff
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|
578 | must be a valid pointer |
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parents:
diff
changeset
|
579 | frame_ok - TRUE if the frame is ok, else FALSE, must be |
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parents:
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580 | a valid pointer |
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parents:
diff
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|
581 | frame_rej - indicates a frame rejection condition, must be |
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parents:
diff
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|
582 | a valid pointer |
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parents:
diff
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|
583 | frame_rej_ctrl_length - number of octets in the rejected |
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parents:
diff
changeset
|
584 | control field, must be a valid pointer |
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parents:
diff
changeset
|
585 | |
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parents:
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|
586 +------------------------------------------------------------------------------ |
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parents:
diff
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|
587 */ |
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parents:
diff
changeset
|
588 |
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parents:
diff
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|
589 /*#if defined(CF_FAST_EXEC) || defined(_SIMULATION_) || \ |
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parents:
diff
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|
590 !defined(REL99) || defined(LL_2to1) */ |
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parents:
diff
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|
591 |
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parents:
diff
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|
592 GLOBAL void rx_interpret_frame (T_sdu *frame, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
593 UBYTE *sapi, |
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parents:
diff
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|
594 T_PDU_TYPE *pdu_type, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
595 T_COMMAND *command, |
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Mychaela Falconia <falcon@freecalypso.org>
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diff
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|
596 T_BIT *cr_bit, |
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parents:
diff
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|
597 T_BIT *pf_bit, |
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parents:
diff
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|
598 T_FRAME_NUM *nr, |
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parents:
diff
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|
599 T_FRAME_NUM *ns, |
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parents:
diff
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|
600 BOOL *frame_ok, |
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parents:
diff
changeset
|
601 UBYTE *frame_rej, |
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parents:
diff
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|
602 USHORT *frame_rej_ctrl_length, |
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parents:
diff
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|
603 UBYTE cipher) |
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parents:
diff
changeset
|
604 { |
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parents:
diff
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|
605 USHORT min_length = 0; /* minimum required frame length */ |
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|
606 BOOL check_length; /* check/ignore length at the end */ |
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parents:
diff
changeset
|
607 |
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parents:
diff
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|
608 TRACE_FUNCTION( "rx_interpret_frame" ); |
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parents:
diff
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|
609 |
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parents:
diff
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|
610 /* |
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parents:
diff
changeset
|
611 * Preset variables with suspected success, control field length is not |
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parents:
diff
changeset
|
612 * yet known, so assume complete frame length. |
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parents:
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|
613 */ |
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|
614 *frame_ok = TRUE; |
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|
615 *frame_rej = FRAME_NOT_REJ; |
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parents:
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|
616 *frame_rej_ctrl_length = frame->l_buf/8 - 1; |
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diff
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|
617 |
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|
618 /* |
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|
619 * Frame length is selectively activated, depending on frame type, command, |
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|
620 * etc. Ignore frame length per default. |
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|
621 */ |
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parents:
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|
622 check_length = FALSE; |
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|
623 |
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parents:
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|
624 |
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parents:
diff
changeset
|
625 /* |
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parents:
diff
changeset
|
626 * Check if the frame contains enough octets to access the first octet of |
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parents:
diff
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|
627 * the control field to find out the type of the frame. |
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parents:
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changeset
|
628 */ |
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parents:
diff
changeset
|
629 if (frame->l_buf/8 < CTRL_MIN_OCTETS) |
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parents:
diff
changeset
|
630 { |
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parents:
diff
changeset
|
631 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
632 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
633 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
634 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
635 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
636 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
637 * Check if PD bit is set to 0. If it is not, the frame is invalid. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
638 * <R.LLC.XCEPTION.A.001> |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
639 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
640 if ((frame->buf[frame->o_buf/8] & 0x80) != 0x00) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
641 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
642 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
643 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
644 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
645 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
646 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
647 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
648 * Extract C/R bit. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
649 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
650 *cr_bit = (frame->buf[frame->o_buf/8] & 0x40) >> 6; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
651 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
652 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
653 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
654 * Extract SAPI and check if the frame contains a reserved SAPI. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
655 * <R.LLC.XCEPTION.A.001> |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
656 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
657 *sapi = frame->buf[frame->o_buf/8] & 0x0F; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
658 switch (*sapi) /* !!!!! constants or function/macro to determine invalid sapis */ |
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 case 0: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
661 case 2: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
662 case 4: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
663 case 6: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
664 case 8: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
665 case 10: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
666 case 12: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
667 case 13: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
668 case 14: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
669 case 15: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
670 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
671 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
672 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
673 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
674 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
675 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
676 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
677 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
678 * Determine the PDU type of the frame, along with the minimum length |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
679 * required for this PDU type to constitute a complete frame. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
680 * Additionally, extract available variables for each PDU type. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
681 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
682 if ((frame->buf[(frame->o_buf/8)+1] & I_FRAME_MASK) EQ I_FRAME_ID) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
683 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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 * I frame, at least 5 octets (1 Address, 3 Control, 1(++) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
686 * Information, no FCS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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 *pdu_type = I_FRAME; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
689 min_length = I_FRAME_MIN_OCTETS_WITHOUT_FCS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
690 *frame_rej_ctrl_length = I_CTRL_OCTETS; |
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 * Extract A bit (stored in P/F bit) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
694 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
695 *pf_bit = (frame->buf[(frame->o_buf/8)+1] & 0x40) >> 6; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
696 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
697 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
698 * Check if the frame contains enough octets to access the complete |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
699 * I frame control field. |
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 if (frame->l_buf/8 < I_CTRL_MIN_OCTETS) |
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 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
704 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
705 } |
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 * Extract N(S), N(R) |
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 *ns = (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+1] & 0x1F) << 4; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
711 *ns |= (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+2] >> 4); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
712 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
713 *nr = (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+2] & 0x07) << 6; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
714 *nr |= (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+3] >> 2); |
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 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
717 * Determine the command of the I frame (S1 & S2 bits) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
718 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
719 switch (frame->buf[(frame->o_buf/8)+3] & 0x03) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
720 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
721 case I_FRAME_RR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
722 TRACE_4_PARA("I-RR s:%d len:%d nr:%d ns:%d", *sapi, BYTELEN(frame->l_buf), *nr, *ns); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
723 *command = I_RR; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
724 break; |
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 case I_FRAME_ACK: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
727 TRACE_4_PARA("I-ACK s:%d len:%d nr:%d ns:%d", *sapi, BYTELEN(frame->l_buf), *nr, *ns); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
728 *command = I_ACK; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
729 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
730 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
731 case I_FRAME_RNR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
732 TRACE_4_PARA("I-RNR s:%d len:%d nr:%d ns:%d", *sapi, BYTELEN(frame->l_buf), *nr, *ns); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
733 *command = I_RNR; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
734 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
735 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
736 case I_FRAME_SACK: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
737 TRACE_4_PARA("I-SACK s:%d len:%d nr:%d ns:%d", *sapi, BYTELEN(frame->l_buf), *nr, *ns); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
738 *command = I_SACK; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
739 |
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 * Check if the frame contains enough octets to access the complete |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
742 * I frame SACK control field. K is at octet I_CTRL_MIN_OCTETS + 1 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
743 * and there must be at least K+1 octets within the bitmap. Therefore |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
744 * the frame must contain a minimum of I_CTRL_MIN_OCTETS+2. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
745 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
746 if (frame->l_buf/8 < I_CTRL_MIN_OCTETS+2) |
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 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
749 return; |
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 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
752 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
753 * min_length is being modified to be more accurate for SACK frames, |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
754 * according to the Bitmap Length Indicator K in |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
755 * frame->buf[(frame->o_buf/8)+4]. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
756 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
757 min_length += (frame->buf[(frame->o_buf/8)+4] & 0x1F) + 1; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
758 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
759 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
760 break; |
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
|
762 default: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
763 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
764 * Frame rejection condition due to receipt of a command or |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
765 * response field that is undefined or not implemented (set |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
766 * W3 bit to 1). |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
767 * <R.LLC.XCEPTION.A.002> |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
768 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
769 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
770 *frame_rej = FRAME_REJ_W3; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
771 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
772 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
773 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
774 else if ((frame->buf[(frame->o_buf/8)+1] & S_FRAME_MASK) EQ S_FRAME_ID) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
775 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
776 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
777 * S frame, fixed 3 octets (1 Address, 2 Control, 0 Information, no FCS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
778 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
779 *pdu_type = S_FRAME; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
780 min_length = S_FRAME_MIN_OCTETS_WITHOUT_FCS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
781 *frame_rej_ctrl_length = S_CTRL_OCTETS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
782 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
783 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
784 * Extract A bit (stored in P/F bit) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
785 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
786 *pf_bit = (frame->buf[(frame->o_buf/8)+1] & 0x20) >> 5; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
787 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
788 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
789 * Check if the frame contains enough octets to access the complete |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
790 * S frame control field. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
791 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
792 if (frame->l_buf/8 < S_CTRL_MIN_OCTETS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
793 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
794 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
795 *frame_rej = FRAME_REJ_W1; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
796 *frame_rej_ctrl_length = frame->l_buf/8 - 1; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
797 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
798 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
799 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
800 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
801 * Extract N(R) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
802 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
803 *nr = (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+1] & 0x07) << 6; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
804 *nr |= (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+2] >> 2); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
805 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
806 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
807 * Determine the command of the S frame (S1 & S2 bits) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
808 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
809 switch (frame->buf[(frame->o_buf/8)+2] & 0x03) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
810 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
811 case I_FRAME_RR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
812 TRACE_2_PARA("S-RR s:%d nr:%d", *sapi, *nr); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
813 *command = I_RR; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
814 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
815 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
816 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
817 case I_FRAME_ACK: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
818 TRACE_2_PARA("S-ACK s:%d nr:%d", *sapi, *nr); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
819 *command = I_ACK; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
820 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
821 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
822 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
823 case I_FRAME_RNR: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
824 TRACE_2_PARA("S-RNR s:%d nr:%d", *sapi, *nr); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
825 *command = I_RNR; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
826 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
827 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
828 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
829 case I_FRAME_SACK: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
830 TRACE_2_PARA("S-SACK s:%d nr:%d", *sapi, *nr); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
831 *command = I_SACK; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
832 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
833 * min_length is being modified to be more accurate for SACK frames. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
834 * The S frame SACK format adds a number of up to 32 octets to the |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
835 * control field. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
836 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
837 min_length += S_FRAME_SACK_MIN_CTRL_OCTETS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
838 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
839 check_length = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
840 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
841 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
842 default: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
843 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
844 * Frame rejection condition due to receipt of a command or |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
845 * response field that is undefined or not implemented (set |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
846 * W3 bit to 1). |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
847 * <R.LLC.XCEPTION.A.002> |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
848 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
849 *frame_ok = FALSE; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
850 *frame_rej = FRAME_REJ_W3; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
851 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
852 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
853 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
854 else if ((frame->buf[(frame->o_buf/8)+1] & UI_FRAME_MASK) EQ UI_FRAME_ID) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
855 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
856 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
857 * UI frame, at least 3 octets (1 Address, 2 Control, 0(++) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
858 * Information, no FCS) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
859 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
860 *pdu_type = UI_FRAME; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
861 min_length = UI_FRAME_MIN_OCTETS_WITHOUT_FCS; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
862 *frame_rej_ctrl_length = UI_CTRL_OCTETS; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
863 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
864 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
865 * Check if the frame contains enough octets to access the complete |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
866 * UI frame control field. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
867 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
868 if (frame->l_buf/8 < UI_CTRL_MIN_OCTETS) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
869 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
870 *frame_ok = FALSE; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
871 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
872 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
873 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
874 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
875 * Extract N(U) (is stored in N(R)) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
876 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
877 *nr = (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+1] & 0x07) << 6; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
878 *nr |= (T_FRAME_NUM)(frame->buf[(frame->o_buf/8)+2] >> 2); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
879 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
880 TRACE_4_PARA("UI s:%d len:%d nr:%d c:%d", *sapi, BYTELEN(frame->l_buf), *nr, cipher); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
881 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
882 else if ((frame->buf[(frame->o_buf/8)+1] & U_FRAME_MASK) EQ U_FRAME_ID) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
883 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
884 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
885 * U frame, at least 2 octets (1 Address, 1 Control, 0(++) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
886 * Information, no FCS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
887 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
888 *pdu_type = U_FRAME; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
889 min_length = U_FRAME_MIN_OCTETS_WITHOUT_FCS; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
890 *frame_rej_ctrl_length = U_CTRL_OCTETS; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
891 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
892 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
893 * Extract P/F bit |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
894 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
895 *pf_bit = (frame->buf[(frame->o_buf/8)+1] & 0x10) >> 4; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
896 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
897 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
898 * Check if the frame contains enough octets to access the complete |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
899 * U frame control field. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
900 * NOTE: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
901 * This check could be omitted, because the U frame control field size |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
902 * is only one octet. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
903 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
904 if (frame->l_buf/8 < U_CTRL_MIN_OCTETS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
905 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
906 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
907 *frame_rej = FRAME_REJ_W1; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
908 return; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
909 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
910 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
911 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
912 * Determine the command of the U frame (M4, M3, M2, M1). |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
913 * Adjust the minimum length of the frame, if possible. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
914 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
915 switch (frame->buf[(frame->o_buf/8)+1] & 0x0F) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
916 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
917 case U_FRAME_DM: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
918 TRACE_1_PARA("DM s:%d", *sapi); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
919 *command = U_DM; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
920 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
921 * No information field is permitted. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
922 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
923 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
924 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
925 case U_FRAME_DISC: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
926 TRACE_1_PARA("DISC s:%d", *sapi); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
927 *command = U_DISC; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
928 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
929 * No information field is permitted. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
930 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
931 check_length = TRUE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
932 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
933 case U_FRAME_UA: |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
934 TRACE_2_PARA("UA s:%d len:%d", *sapi, BYTELEN(frame->l_buf)); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
935 *command = U_UA; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
936 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
937 * No knowledge if an information field is permitted, because |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
938 * this is only the case when UA is the response to SABM. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
939 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
940 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
941 case U_FRAME_SABM: |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
942 TRACE_2_PARA("SABM s:%d len:%d", *sapi, BYTELEN(frame->l_buf)); |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
943 *command = U_SABM; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
944 /* |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
945 * An information field is permitted, containing XID |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
946 * parameters. Therefore the size of the information field |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
947 * is not (yet) known. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
948 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
949 break; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
950 case U_FRAME_FRMR: |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
951 TRACE_1_PARA("FRMR s:%d", *sapi); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
952 *command = U_FRMR; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
953 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
954 * FRMR response contains an information field of 10 octets. |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
955 * <R.LLC.XCEPTION.A.008> |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
956 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
957 min_length += U_FRAME_FRMR_INFO_OCTETS; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
958 check_length = TRUE; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
959 break; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
960 case U_FRAME_XID: |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
961 if( *cr_bit == SGSN_COMMAND ) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
962 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
963 TRACE_2_PARA("XID REQ s:%d len:%d", *sapi, BYTELEN(frame->l_buf)); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
964 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
965 else |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
966 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
967 TRACE_2_PARA("XID RSP s:%d len:%d", *sapi, BYTELEN(frame->l_buf)); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
968 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
969 *command = U_XID; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
970 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
971 * An information field is required, containing XID |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
972 * parameters. Therefore the size of the information field |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
973 * is not (yet) known. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
974 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
975 break; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
976 default: |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
977 TRACE_0_INFO("Not supported U frame received"); |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
978 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
979 * Frame rejection condition due to receipt of a command or |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
980 * response field that is undefined or not implemented (set |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
981 * W3 bit to 1). |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
982 * <R.LLC.XCEPTION.A.002> |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
983 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
984 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
985 *frame_rej = FRAME_REJ_W3; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
986 return; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
987 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
988 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
989 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
990 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
991 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
992 * Determine if it is requested to check the frame length exactly |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
993 * (check_length EQ TRUE), or just to check the minimum frame length |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
994 * (check_length EQ FALSE). |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
995 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
996 if (check_length AND (frame->l_buf/8 NEQ min_length)) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
997 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
998 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
999 * Actual length of frame doesn't correspond with computed length. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1000 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1001 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1002 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1003 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1004 * Check if frame rejection condition occured: S or U frame with |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1005 * incorrect length (= W1 + W3 bits). frame_rej_ctrl_length has already |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1006 * been set above to the correct control field length. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1007 * <R.LLC.XCEPTION.A.002>, <R.LLC.XCEPTION.A.010> |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1008 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1009 if ((*pdu_type EQ S_FRAME) OR (*pdu_type EQ U_FRAME)) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1010 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1011 *frame_rej = FRAME_REJ_W1 | FRAME_REJ_W3; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1012 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1013 return; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1014 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1015 else if (frame->l_buf/8 < min_length) |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1016 { |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1017 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1018 * Frame doesn't contain enough octets to include the address field, |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1019 * control field, information field, and FCS field necessary to constitute |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1020 * a complete frame according to the PDU type. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1021 * <R.LLC.XCEPTION.A.001> |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1022 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1023 *frame_ok = FALSE; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1024 return; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1025 } |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1026 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1027 return; |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1028 } /* rx_interpret_frame() */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1029 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1030 /* #endif */ /* CF_FAST_EXEC || _SIMULATION_ */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1031 |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1032 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1033 /* |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1034 +------------------------------------------------------------------------------ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1035 | Function : rx_strip_llc_header |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1036 +------------------------------------------------------------------------------ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1037 | Description : This procedure strips the LLC header field off of the sdu |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1038 | so that the sdu contains only the remaining L3-PDU. |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1039 | |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1040 | Parameters : sdu - contains the SDU (frame), must be a valid pointer |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1041 | pdu_type - contains the PDU type of the frame, must be |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1042 | a valid PDU type |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1043 | command - contains the command (I/S, U) of the frame, must be |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1044 | a valid command for the given PDU type |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1045 | |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1046 +------------------------------------------------------------------------------ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1047 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1048 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1049 #ifndef CF_FAST_EXEC |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1050 |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1051 GLOBAL void rx_strip_llc_header (T_sdu *sdu, |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1052 T_PDU_TYPE pdu_type, |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1053 T_COMMAND command) |
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1054 { |
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1055 UBYTE header_len = 0; |
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1056 |
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1057 |
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|
1058 TRACE_FUNCTION ("rx_strip_llc_header"); |
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1059 |
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|
1060 switch (pdu_type) |
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1061 { |
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1062 case I_FRAME: |
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1063 /* |
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1064 * I frame 4 octets. Leave SACK Bitmap in PDU, will be stripped later! |
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1065 * (1 Address, 3Control). |
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1066 */ |
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1067 header_len = I_CTRL_MIN_OCTETS; |
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|
1068 break; |
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1069 case S_FRAME: |
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|
1070 /* |
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1071 * S frame 3 octets. Leave SACK Bitmap in PDU, will be stripped later! |
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1072 * (1 Address, 2(+32 max) Control). |
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1073 */ |
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1074 header_len = S_CTRL_MIN_OCTETS; |
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1075 break; |
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1076 case UI_FRAME: |
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|
1077 /* |
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1078 * UI frame, 3 octets (1 Address, 2 Control). |
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1079 */ |
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|
1080 header_len = UI_CTRL_MIN_OCTETS; |
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1081 break; |
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|
1082 case U_FRAME: |
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|
1083 /* |
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1084 * U frame, 2 octets (1 Address, 1 Control). |
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1085 */ |
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|
1086 header_len = U_CTRL_MIN_OCTETS; |
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|
1087 break; |
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|
1088 default: |
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|
1089 TRACE_ERROR ("Unknown PDU type"); |
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|
1090 break; |
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1091 } |
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1092 |
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1093 /* |
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1094 * Adjust the beginning of the PDU using the determined header_len. |
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1095 */ |
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1096 sdu->o_buf += header_len * 8; |
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1097 |
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1098 /* |
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1099 * Adjust the length of the PDU by the size of the header field. |
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1100 */ |
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1101 sdu->l_buf -= header_len * 8; |
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1102 |
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1103 return; |
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1104 } /* rx_strip_llc_header() */ |
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1105 |
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1106 #endif /* CF_FAST_EXEC */ |
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1107 |
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1108 /* |
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1109 +------------------------------------------------------------------------------ |
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1110 | Function : rx_get_desc_octet |
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1111 +------------------------------------------------------------------------------ |
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1112 | Description : This procedure maps the given linear offset to a descriptor |
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1113 | list and returns the value of the octet at this offset. If |
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1114 | offset is too large for descriptor list, 0x00 is returned. |
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1115 | Each descriptor in descriptor list is evaluated until the |
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1116 | requested offset is reached. The resulting octet value is |
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1117 | written to the referenced parameter data_ptr (if not set to |
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1118 | NULL), and is additionally returned. |
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1119 | |
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1120 | Parameters : desc_list - a valid pointer to a valid descriptor list |
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1121 | offset - linear octet offset, beginning with 0 |
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1122 | data_ptr - a valid pointer to be set to the resulting octet |
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1123 | value, or NULL |
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1124 | |
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1125 +------------------------------------------------------------------------------ |
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1126 */ |
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1127 |
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1128 #ifndef CF_FAST_EXEC |
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1129 |
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1130 GLOBAL UBYTE rx_get_desc_octet (T_desc_list *desc_list, |
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1131 USHORT offset, |
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1132 UBYTE *data_ptr) |
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1133 { |
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1134 T_desc *desc; |
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1135 UBYTE *desc_data; /* local pointer to data octet */ |
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1136 |
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1137 /* |
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1138 * Check if offset is contained in descriptor list. Return 0x00 if not. |
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1139 */ |
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1140 if (offset >= desc_list->list_len) |
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1141 { |
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1142 TRACE_ERROR ("offset too large for descriptor list"); |
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1143 return 0x00; |
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1144 } |
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1145 |
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1146 /* |
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1147 * Search requested data with given linear offset in descriptor list. |
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1148 * Empty descriptors are skipped. Check for each descriptor if requested |
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1149 * offset is in descriptor, until it is found. |
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1150 */ |
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1151 desc = (T_desc *)desc_list->first; |
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1152 desc_data = NULL; |
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1153 do |
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|
1154 { |
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1155 if (offset < desc->len) |
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|
1156 { |
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1157 /* |
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1158 * Requested data is in current descriptor. Set desc_data to point to |
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|
1159 * requested octet with remaining offset (has been decremented by |
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|
1160 * already passed descriptor payload). |
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1161 */ |
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1162 /*lint -e662 Possible creation of out-of-bounds pointer */ |
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1163 desc_data = &(desc->buffer[offset]); |
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1164 } |
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1165 else |
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1166 { |
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1167 /* |
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1168 * Requested data is not in current descriptor. Remember data payload |
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1169 * of current descriptor as already passed. |
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1170 */ |
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1171 offset -= desc->len; |
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1172 } |
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1173 |
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1174 desc = (T_desc *)desc->next; |
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1175 } |
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1176 while ((desc NEQ NULL) AND (desc_data EQ NULL)); |
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1177 |
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1178 |
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1179 if (desc_data EQ NULL) |
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1180 { |
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1181 TRACE_ERROR ("descriptor list ended before offset found"); |
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1182 |
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1183 if (data_ptr NEQ NULL) |
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1184 { |
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1185 *data_ptr = 0; |
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1186 } |
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1187 |
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1188 return 0; |
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1189 } |
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1190 else |
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1191 { |
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1192 /* |
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1193 * Store value of found octet in data_ptr, if pointer is valid. |
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1194 */ |
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1195 if (data_ptr NEQ NULL) |
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1196 { |
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1197 /*lint -e661 Possible access of out-of-bounds pointer */ |
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1198 *data_ptr = *desc_data; |
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1199 } |
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1200 |
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1201 return *desc_data; |
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1202 } |
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1203 } /* rx_get_desc_octet() */ |
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1204 |
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|
1205 #endif /* CF_FAST_EXEC */ |