FreeCalypso > hg > fc-magnetite
annotate src/g23m-gprs/llc/llc_rxf.c @ 640:16eb1b9640dc
target gtm900 renamed to gtm900mgc2
This change reflects the fact that the build target in question supports
MGC2GSMT hardware only, and will NOT work on other hw that confusing bears
the same end user name of GTM900, neither the LoCosto-based GTM900-C
nor the Calypso-based MG01GSMT that has a different and incompatible RFFE.
If we ever get our hands on a piece of MG01GSMT hw and add support for it,
that other target will be named gtm900mg01.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 31 Jan 2020 00:46:07 +0000 |
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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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diff
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|
314 } /* rx_analyse_ctrl_field() */ |
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parents:
diff
changeset
|
315 |
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parents:
diff
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316 #endif /* CF_FAST_EXEC */ |
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317 |
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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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parents:
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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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parents:
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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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changeset
|
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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diff
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|
488 |
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|
489 if (ciphering EQ TRUE) |
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parents:
diff
changeset
|
490 { |
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parents:
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changeset
|
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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diff
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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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parents:
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|
498 */ |
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|
499 switch (frame_type) |
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|
500 { |
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parents:
diff
changeset
|
501 case I_FRAME: |
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parents:
diff
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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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parents:
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changeset
|
507 break; |
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parents:
diff
changeset
|
508 |
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parents:
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changeset
|
509 default: |
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parents:
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changeset
|
510 if (ns >= llc_data->sapi->vur) |
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diff
changeset
|
511 oc = llc_data->sapi->oc_ui_rx; |
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diff
changeset
|
512 else |
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diff
changeset
|
513 oc = llc_data->sapi->oc_ui_rx + (MAX_SEQUENCE_NUMBER+1); |
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changeset
|
514 break; |
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parents:
diff
changeset
|
515 } |
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parents:
diff
changeset
|
516 |
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diff
changeset
|
517 llc_generate_input (llc_data->current_sapi, frame_type, ns, |
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parents:
diff
changeset
|
518 &cci_decipher_req->ciphering_input, oc); |
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parents:
diff
changeset
|
519 |
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parents:
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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:
diff
changeset
|
522 else /* ciphering EQ FALSE */ |
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parents:
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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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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parents:
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536 |
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parents:
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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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parents:
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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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parents:
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:
diff
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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:
diff
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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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parents:
diff
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|
570 | (if available), must be a valid pointer |
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parents:
diff
changeset
|
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:
diff
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|
572 | a valid pointer |
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parents:
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changeset
|
573 | pf_bit - will be set to the P/F bit of the frame (if |
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parents:
diff
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|
574 | available), must be a valid pointer |
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parents:
diff
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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
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|
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
changeset
|
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:
diff
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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
changeset
|
591 |
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parents:
diff
changeset
|
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>
parents:
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
changeset
|
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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parents:
diff
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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
changeset
|
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:
diff
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|
613 */ |
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parents:
diff
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|
614 *frame_ok = TRUE; |
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parents:
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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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parents:
diff
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|
617 |
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parents:
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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:
diff
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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
changeset
|
627 * the control field to find out the type of the frame. |
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parents:
diff
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|
628 */ |
219afcfc6250
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
629 if (frame->l_buf/8 < CTRL_MIN_OCTETS) |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
630 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
848 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
849 *frame_ok = FALSE; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
850 *frame_rej = FRAME_REJ_W3; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
855 { |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
861 min_length = UI_FRAME_MIN_OCTETS_WITHOUT_FCS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
862 *frame_rej_ctrl_length = UI_CTRL_OCTETS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
890 *frame_rej_ctrl_length = U_CTRL_OCTETS; |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
944 /* |
219afcfc6250
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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
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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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
968 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
988 } |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
995 */ |
219afcfc6250
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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
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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
src/g23m-gprs: initial import from TCS3.2/LoCosto
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 |
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1051 GLOBAL void rx_strip_llc_header (T_sdu *sdu, |
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1052 T_PDU_TYPE pdu_type, |
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|
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 */ |