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1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 //The minumum free RAM for mtp server startup, in Bytes. |
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17 //If current free RAM is lower than this threhold value, mtp server |
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18 //will not get started. |
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19 #define SYMBIAN_MTP_RAM_THRESHOLD 4*1024*1024 //4MB |
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20 |
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21 //The minimum free space in phone memory for mtp server startup, in Bytes. |
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22 //If current free space in phone memory is lower than this threhold value, |
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23 //mtp server will not get started. |
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24 #define SYMBIAN_MTP_PHONE_MEMORY_THRESHOLD 512*1024 //512KB |
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25 |
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26 //The drive used as phone memory in target device |
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27 #define SYMBIAN_PHONE_MEMORY_DRIVE_NAME EDriveC |
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28 |
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29 #include <e32cmn.h> |
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30 #include <e32uid.h> |
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31 #include <hal.h> //for HAL to get free RAM |
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32 #include <f32file.h> //for RFs to get free disk space in phone memory |
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33 #include <mtp/rmtpclient.h> |
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34 #include "mtpclientserver.h" |
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35 |
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36 /** |
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37 Get the free RAM. |
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38 @param on return, 'aFree' contains the free memory in bytes. |
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39 @return ErrNone on success, other system-wide error on failure. |
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40 */ |
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41 static TInt GetFreeRAM(TInt &aFree) |
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42 { |
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43 TInt err = HAL::Get(HAL::EMemoryRAMFree,aFree); |
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44 __ASSERT_DEBUG(err != KErrArgument,User::Invariant()); |
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45 return err; |
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46 } |
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47 |
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48 /** |
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49 Get the free disk space in phone memory. |
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50 @param on return,'aFree' contains the free space in bytes. |
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51 @return ErrNone on success, other system-wide error on failure. |
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52 */ |
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53 static TInt GetFreeSpaceInPhoneMemory(TInt64 &aFree) |
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54 { |
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55 TVolumeInfo info; |
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56 RFs rfs; |
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57 TInt err = rfs.Connect(); |
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58 if (err != KErrNone) |
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59 { |
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60 return err; |
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61 } |
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62 |
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63 err = rfs.Volume(info,SYMBIAN_PHONE_MEMORY_DRIVE_NAME); |
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64 aFree = info.iFree; |
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65 rfs.Close(); |
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66 return err; |
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67 } |
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68 |
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69 /** |
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70 Starts the MTP daemon server process. |
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71 @return KErrNone if the MTP daemon server process is started successfully, |
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72 otherwise one of the system wide error codes. |
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73 */ |
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74 |
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75 LOCAL_D TInt StartServer() |
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76 { |
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77 const TUidType serverUid(KNullUid, KNullUid, KMTPServerUid3); |
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78 |
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79 //Firstly, check the free ram |
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80 TInt freeRam = 0; |
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81 TInt err = GetFreeRAM(freeRam); |
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82 |
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83 //Ignore the error code and move ahead |
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84 if (err == KErrNone && freeRam < SYMBIAN_MTP_RAM_THRESHOLD) |
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85 { |
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86 return KErrNoMemory; |
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87 } |
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88 |
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89 //Secondly,check the free disk space in phone memory |
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90 TInt64 freeDisk = 0; |
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91 err = GetFreeSpaceInPhoneMemory(freeDisk); |
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92 |
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93 //Ignore the error code and move ahead |
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94 if (err == KErrNone && freeDisk < SYMBIAN_MTP_PHONE_MEMORY_THRESHOLD) |
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95 { |
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96 return KErrDiskFull; |
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97 } |
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98 |
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99 // Create the server process. |
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100 RProcess server; |
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101 TInt ret(server.Create(KMTPServerName, KNullDesC, serverUid)); |
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102 if (ret == KErrNone) |
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103 { |
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104 TRequestStatus status; |
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105 server.Rendezvous(status); |
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106 |
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107 if (status != KRequestPending) |
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108 { |
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109 // Abort the server process. |
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110 server.Kill(status.Int()); |
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111 } |
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112 else |
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113 { |
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114 // Run the server process. |
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115 server.Resume(); |
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116 } |
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117 // Wait for the server start up to complete. |
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118 User::WaitForRequest(status); |
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119 ret = (server.ExitType() == EExitPanic) ? KErrGeneral : status.Int(); |
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120 server.Close(); |
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121 } |
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122 |
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123 return ret; |
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124 } |
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125 |
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126 |
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127 |
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128 /** |
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129 Constructor. |
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130 */ |
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131 EXPORT_C RMTPClient::RMTPClient() : |
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132 iVersion(KMTPVersionMajor, KMTPVersionMinor, KMTPVersionBuild) |
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133 { |
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134 |
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135 } |
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136 |
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137 /** |
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138 Closes a connection to the MTP daemon server. |
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139 */ |
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140 EXPORT_C void RMTPClient::Close() |
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141 { |
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142 RSessionBase::Close(); |
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143 } |
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144 |
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145 /** |
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146 Opens a connection to the MTP daemon server. |
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147 @return KErrNone if the connection is made, otherwise one of the system wide |
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148 error codes. |
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149 */ |
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150 EXPORT_C TInt RMTPClient::Connect() |
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151 { |
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152 TInt ret(KErrNone); |
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153 const TSecurityPolicy policy(static_cast<TSecureId>(KMTPServerUid3)); |
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154 const static TInt KMaxRetries(3); |
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155 for (TInt retry(KMaxRetries); ((retry > 0) && ((ret == KErrNone) || (ret == KErrAlreadyExists))); retry--) |
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156 { |
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157 ret = CreateSession(KMTPServerName, iVersion, KMTPASyncMessageSlots, EIpcSession_Unsharable, &policy); |
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158 |
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159 if ((ret == KErrNotFound) || (ret == KErrServerTerminated)) |
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160 { |
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161 ret = StartServer(); |
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162 } |
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163 else |
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164 { |
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165 // Return if there's any err other than KErrNotFound or KErrServerTerminated. |
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166 retry = 0; |
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167 } |
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168 } |
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169 return ret; |
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170 } |
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171 |
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172 /** |
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173 Starts up the specified MTP transport protocol. |
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174 @param aTransport The implementation UID of the transport protocol implemetation. |
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175 @return KErrNone if the transport is started successfully, otherwise one of the |
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176 system wide error codes. |
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177 */ |
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178 EXPORT_C TInt RMTPClient::StartTransport(TUid aTransport) |
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179 { |
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180 TIpcArgs args( static_cast< TInt >( aTransport.iUid ), &KNullDesC8 ); |
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181 return SendReceive( EMTPClientStartTransport, args ); |
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182 } |
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183 |
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184 /** |
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185 Starts up the specified MTP BLUETOOTH transport protocol. |
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186 @param aTransport The implementation UID of the transport protocol implemetation. |
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187 @return KErrNone if the transport is started successfully, otherwise one of the |
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188 system wide error codes. |
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189 */ |
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190 EXPORT_C TInt RMTPClient::StartTransport(TUid aTransport, const TDesC8& aParameter) |
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191 { |
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192 TIpcArgs args(static_cast<TInt>(aTransport.iUid), &aParameter); |
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193 return SendReceive(EMTPClientStartTransport,args); |
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194 } |
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195 |
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196 /** |
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197 Shuts down the specified MTP transport protocol. |
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198 @param aTransport The implementation UID of the transport protocol implemetation. |
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199 @return KErrNone if the transport is started successfully, otherwise one of the |
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200 system wide error codes. |
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201 */ |
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202 EXPORT_C TInt RMTPClient::StopTransport(TUid aTransport) |
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203 { |
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204 return SendReceive(EMTPClientStopTransport, TIpcArgs(static_cast<TInt>(aTransport.iUid))); |
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205 } |
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206 |
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207 /** |
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208 Provides the minimum MTP daemon version with which the MTP client API is |
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209 compatible. |
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210 @return The minimum MTP daemon version. |
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211 */ |
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212 EXPORT_C const TVersion& RMTPClient::Version() const |
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213 { |
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214 return iVersion; |
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215 } |
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216 |
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217 /** |
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218 Checks whether MTP Framework shall allow the StartTransport Command or not. |
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219 @param aTransport The implementation UID of the transport protocol implementation. |
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220 @return KErrNone if the MTP FW is available for the given Transport,KErrAlreadyExists- If the same transport is running. |
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221 KErrServerBusy- If the Transport can not be started. |
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222 */ |
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223 EXPORT_C TInt RMTPClient::IsAvailable(TUid aTransport) |
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224 { |
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225 return SendReceive(EMTPClientIsAvailable, TIpcArgs(static_cast<TInt>(aTransport.iUid))); |
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226 } |
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227 |
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228 /** |
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229 Checks whether the mtpserver.exe process is running or not. |
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230 @returns KErrNone if mtpserver.exe is runnig, KErrNotFound if the process is not running. |
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231 */ |
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232 EXPORT_C TInt RMTPClient::IsProcessRunning() |
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233 { |
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234 TFindServer findProc; |
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235 findProc.Find(KMTPServerName); |
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236 TFullName procName; |
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237 return findProc.Next(procName); |
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238 |
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239 } |
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240 |