FreeCalypso > hg > fc-tourmaline
annotate src/g23m-aci/aci/psa_pppp.c @ 220:0ed36de51973
ABB semaphore protection overhaul
The ABB semaphone protection logic that came with TCS211 from TI
was broken in several ways:
* Some semaphore-protected functions were called from Application_Initialize()
context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with
NU_INVALID_SUSPEND in this context, but the return value wasn't checked,
and NU_Release_Semaphore() would be called unconditionally at the end.
The latter call would increment the semaphore count past 1, making the
semaphore no longer binary and thus no longer effective for resource
protection. The fix is to check the return value from NU_Obtain_Semaphore()
and skip the NU_Release_Semaphore() call if the semaphore wasn't properly
obtained.
* Some SPI hardware manipulation was being done before entering the semaphore-
protected critical section. The fix is to reorder the code: first obtain
the semaphore, then do everything else.
* In the corner case of L1/DSP recovery, l1_abb_power_on() would call some
non-semaphore-protected ABB & SPI init functions. The fix is to skip those
calls in the case of recovery.
* A few additional corner cases existed, all of which are fixed by making
ABB semaphore protection 100% consistent for all ABB functions and code paths.
There is still one remaining problem of priority inversion: suppose a low-
priority task calls an ABB function, and some medium-priority task just happens
to preempt right in the middle of that semaphore-protected ABB operation. Then
the high-priority SPI task is locked out for a non-deterministic time until
that medium-priority task finishes its work and goes back to sleep. This
priority inversion problem remains outstanding for now.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 26 Apr 2021 20:55:25 +0000 |
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rev | line source |
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1
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1 /* |
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2 +----------------------------------------------------------------------------- |
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3 | Project : GSM-PS (6147) |
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4 | Modul : PSA_PPPP |
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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 module defines the processing functions for the |
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18 | primitives sent to the protocol stack adapter by the PPP |
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19 | module. |
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20 +----------------------------------------------------------------------------- |
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21 */ |
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22 |
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23 #ifdef DTI |
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24 |
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25 #if defined (FF_WAP) || defined (FF_PPP) || defined (FF_GPF_TCPIP) || defined (FF_SAT_E) |
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26 |
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27 #ifndef PSA_PPPP_C |
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28 #define PSA_PPPP_C |
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29 #endif /* of PSA_PPPP_C */ |
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30 |
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31 #include "aci_all.h" |
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32 /*==== INCLUDES ===================================================*/ |
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33 #include "aci_cmh.h" |
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34 #include "ati_cmd.h" |
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35 #include "aci_cmd.h" |
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36 |
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37 #include "dti.h" |
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38 #include "dti_conn_mng.h" |
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39 #include "dti_cntrl_mng.h" |
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40 |
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41 #include "aci_fd.h" |
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42 #include "psa.h" |
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43 #include "psa_l2r.h" |
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44 #include "psa_cc.h" /* for getting the NO_ENTRY definition */ |
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45 #include "wap_aci.h" |
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46 #include "psa_ppp_w.h" |
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47 #include "cmh.h" |
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48 #include "cmh_ppp.h" |
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49 |
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50 |
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51 /*==== CONSTANTS ==================================================*/ |
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52 |
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53 |
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54 /*==== TYPES ======================================================*/ |
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55 |
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56 |
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57 /*==== EXPORT =====================================================*/ |
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58 |
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59 |
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60 /*==== VARIABLES ==================================================*/ |
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61 |
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62 |
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63 /*==== FUNCTIONS ==================================================*/ |
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64 |
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65 |
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66 |
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67 |
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68 /* |
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69 +-------------------------------------------------------------------+ |
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70 | PROJECT : GSM-PS (6147) MODULE : PSA_PPP | |
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71 | ROUTINE : psa_wppp_establish_cnf | |
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72 +-------------------------------------------------------------------+ |
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73 |
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74 PURPOSE : processes the PPP_ESTABLISH_CNF primitive sent by PPP. |
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75 |
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76 */ |
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77 |
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78 GLOBAL void psa_wppp_establish_cnf(T_PPP_ESTABLISH_CNF *ppp_establish_cnf) |
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79 { |
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80 ULONG ip_address; |
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81 USHORT max_receive_unit; |
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82 ULONG dns1, dns2 ; /* Name server addresses. */ |
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83 TRACE_FUNCTION ("psa_wppp_establish_cnf()"); |
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84 |
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85 if(pppShrdPrm.state EQ PPP_ESTABLISH) |
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86 { |
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87 TRACE_EVENT("PPP_ESTABLISH_CNF received: PPP activated"); |
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88 pppShrdPrm.state = PPP_ESTABLISHED; |
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89 |
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90 ip_address = ppp_establish_cnf -> ip; |
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91 TRACE_EVENT_P4 ("IP Address: %03u.%03u.%03u.%03u", (ip_address & 0xff000000) >> 24, |
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92 (ip_address & 0x00ff0000) >> 16, |
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93 (ip_address & 0x0000ff00) >> 8, |
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94 (ip_address & 0x000000ff) ); |
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95 |
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96 max_receive_unit = ppp_establish_cnf -> mru; |
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97 TRACE_EVENT_P1 ("MRU : %u", max_receive_unit); |
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98 dns1 = ppp_establish_cnf->dns1 ; |
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99 dns2 = ppp_establish_cnf->dns2 ; |
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100 |
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101 cmhPPP_Established(ip_address, max_receive_unit, dns1, dns2); |
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102 } |
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103 else |
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104 { |
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105 TRACE_EVENT("unexpected PPP_ESTABLISH_CNF primitive received"); |
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106 } |
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107 |
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108 PFREE(ppp_establish_cnf); |
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109 } |
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110 |
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111 |
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112 /* |
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113 +--------------------------------------------------------------------+ |
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114 | PROJECT : GSM-PS (6147) MODULE : PSA_PPP | |
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115 | ROUTINE : psa_ppp_dti_connected_ind| |
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116 +--------------------------------------------------------------------+ |
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117 |
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118 PURPOSE : processes the PPP_DTI_CONNECTED_IND primitive sent by PPP. |
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119 |
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120 */ |
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121 |
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122 GLOBAL void psa_wppp_dti_connected_ind(T_PPP_DTI_CONNECTED_IND |
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123 *ppp_dti_connected_ind) |
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124 { |
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125 TRACE_FUNCTION("psa_wppp_dti_connected_ind()"); |
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126 |
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127 if (ppp_dti_connected_ind->connected_direction EQ PPP_DTI_CONN_PEER) |
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128 { |
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129 dti_cntrl_entity_connected( peer_link_id, DTI_ENTITY_PPPC, DTI_OK ); |
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130 } |
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131 else if (ppp_dti_connected_ind->connected_direction EQ PPP_DTI_CONN_PROT) |
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132 { |
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133 dti_cntrl_entity_connected( prot_link_id, DTI_ENTITY_PPPC, DTI_OK ); |
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134 } |
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135 |
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136 PFREE(ppp_dti_connected_ind); |
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137 } |
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138 |
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139 |
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140 /* |
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141 +-------------------------------------------------------------------+ |
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142 | PROJECT : GSM-PS (6147) MODULE : PSA_PPP | |
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143 | ROUTINE : psa_wppp_terminate_ind | |
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144 +-------------------------------------------------------------------+ |
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145 |
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146 PURPOSE : processes the PPP_TERMINATE_IND primitive sent by PPP. |
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147 |
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148 */ |
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149 |
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150 GLOBAL void psa_wppp_terminate_ind(T_PPP_TERMINATE_IND *ppp_terminate_ind) |
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151 { |
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152 |
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153 TRACE_FUNCTION("psa_wppp_terminate_ind()"); |
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154 |
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155 if (Wap_Call OR pppShrdPrm.is_PPP_CALL ) |
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156 { |
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157 |
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158 /* |
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159 * PPP is terminated before - second termination indication received |
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160 */ |
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161 |
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162 if(pppShrdPrm.state EQ PPP_TERMINATED) |
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163 { |
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164 TRACE_EVENT("Unexpected: PPP_TERMINATE_IND received twice"); |
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165 PFREE(ppp_terminate_ind); |
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166 return; |
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167 } |
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168 |
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169 /* |
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170 * Termination after established and by terminate |
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171 */ |
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172 |
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173 if((pppShrdPrm.state EQ PPP_ESTABLISHED) OR (pppShrdPrm.state EQ PPP_TERMINATE)) |
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174 { |
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175 TRACE_EVENT("PPP_TERMINATE_IND, PPP terminate as requested"); |
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176 pppShrdPrm.state = PPP_TERMINATED; |
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177 cmhPPP_Terminated(); |
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178 PFREE(ppp_terminate_ind); |
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179 return; |
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180 } |
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181 |
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182 /* |
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183 * PPP send a terminate indication by establish request |
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184 */ |
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185 |
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186 if(pppShrdPrm.state EQ PPP_ESTABLISH) |
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187 { |
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188 TRACE_EVENT("PPP_TERMINATE_IND, PPP terminate by establish"); |
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189 pppShrdPrm.state = PPP_TERMINATED; |
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190 // cmhIPA_Deconfigurated(); |
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191 cmhPPP_Terminated(); |
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192 PFREE(ppp_terminate_ind); |
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193 return; |
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194 } |
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195 |
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196 else |
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197 { |
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198 pppShrdPrm.state = PPP_TERMINATED; |
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199 TRACE_EVENT("Unexpected: PPP_TERMINATE_IND, PPP in wrong ACI PPP state"); |
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200 } |
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201 } |
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202 else |
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203 TRACE_EVENT("Unexpected: Not a WAP Call"); |
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204 |
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205 PFREE(ppp_terminate_ind); |
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206 |
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207 } |
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208 |
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209 #endif /* of FF_WAP or FF_PPP OR FF_GPF_TCPIP or FF_SAT_E */ |
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210 |
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211 #endif /* DTI */ |