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1 // Copyright (c) 2004-2009 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 // hostname.cpp - hostnames of the local node |
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15 // |
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16 |
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17 #include "hostname.h" |
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18 #include "inet6log.h" |
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19 |
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20 #if defined(TCPIP6_USE_COMMDB) |
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21 # include <commdb.h> |
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22 #else |
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23 # include <commsdattypesv1_1.h> |
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24 using namespace CommsDat; |
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25 #endif |
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26 |
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27 class CLocalHostName : public CBase |
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28 /** |
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29 * Stores a local hostname. |
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30 * |
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31 * The hostnames are stored in separate objects and reference counted. |
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32 * The same hostname can be mapped to multiple network ids. |
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33 * |
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34 */ |
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35 { |
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36 /** |
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37 * Constructor. |
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38 * Private, only used from CLocalHostName::New method, due to somewhat |
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39 * dubious tricks with TLitC class (to store the name). |
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40 */ |
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41 CLocalHostName(const THostName &aName, CLocalHostName *aNext) : iNext(aNext) |
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42 { |
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43 // See _LIT and TLitC for this initializer!!! |
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44 iName.iTypeLength = aName.Length(); |
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45 TPtr((TText *)&iName.iBuf[0], aName.Length()).Copy(aName); |
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46 } |
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47 |
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48 public: |
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49 static CLocalHostName *New(const THostName &aName, CLocalHostName *aNext); |
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50 CLocalHostName *iNext; //< Link to the next name. |
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51 TInt iRefs; //< The reference count (value 0 implies already one reference). |
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52 TLitC<1> iName; //< Host name (<1> is *FAKE*!) |
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53 // |
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54 // This is followed by the actual name characters. |
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55 // CHostName class *CANNOT* be subclassed!!!! |
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56 }; |
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57 |
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58 |
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59 CLocalHostName *CLocalHostName::New(const THostName &aName, CLocalHostName *aNext) |
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60 { |
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61 // note: TLitC<1> causes extra allocation of sizeof(TInt) [depends on align |
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62 // settings]. Could try to adjust the extra requested size down by that amount, |
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63 // but it would result more complex code... -- msa |
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64 return new (aName.Size()) CLocalHostName(aName, aNext); |
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65 } |
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66 |
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67 class TLocalHostMap |
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68 { |
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69 public: |
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70 TLocalHostMap(TUint32 aId, const CLocalHostName *aName) : iId(aId), iName(aName) {} |
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71 const TUint32 iId; |
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72 const CLocalHostName *iName; |
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73 }; |
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74 |
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75 THostNames::~THostNames() |
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76 { |
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77 Cleanup(); |
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78 } |
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79 |
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80 |
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81 |
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82 void THostNames::Cleanup() |
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83 { |
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84 // note: this does not need to worry about reference counts |
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85 // in hostnames, because everything is cleaned. |
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86 delete iMap; |
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87 iMap = NULL; |
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88 |
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89 while (iNameList != NULL) |
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90 { |
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91 CLocalHostName *e = iNameList; |
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92 iNameList = e->iNext; |
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93 delete e; |
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94 } |
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95 } |
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96 |
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97 void THostNames::ReferenceRemoved(const CLocalHostName *aName) |
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98 { |
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99 for (CLocalHostName **h = &iNameList, *p; (p = *h) != NULL; h = &p->iNext) |
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100 { |
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101 if (p == aName) |
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102 { |
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103 if (--p->iRefs < 0) |
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104 { |
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105 *h = p->iNext; |
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106 delete p; |
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107 } |
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108 return; |
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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 TInt THostNames::Map(TUint32 aId, const TDesC &aName) |
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115 { |
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116 // |
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117 // Locate or create a hostname entry |
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118 // |
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119 TInt err = KErrNoMemory; |
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120 |
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121 CLocalHostName *name = iNameList; |
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122 for (;;name = name->iNext) |
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123 { |
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124 if (name == NULL) |
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125 { |
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126 name = CLocalHostName::New(aName, iNameList); |
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127 if (name == NULL) |
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128 return KErrNoMemory; |
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129 iNameList = name; |
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130 // The initial iRefs = 0 is ok. |
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131 break; |
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132 } |
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133 else if (aName.Compare(name->iName) == 0) |
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134 { |
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135 // Additional reference to an existing name. |
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136 name->iRefs++; |
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137 break; |
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138 } |
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139 } |
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140 |
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141 if (iMap != NULL || (iMap = new CArrayFixFlat<TLocalHostMap>(4)) != NULL) |
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142 { |
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143 // |
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144 // Remove old mapping, if any |
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145 // |
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146 for (TInt i = iMap->Count(); i > 0; ) |
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147 { |
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148 TLocalHostMap &m = iMap->At(--i); |
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149 if (m.iId == aId) |
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150 { |
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151 // Id already present, just change the name reference (if changed). |
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152 if (m.iName != name) |
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153 { |
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154 LOG(Log::Printf(_L("\tlocalhost unmapped: <%u, %S(%d)>"), m.iId, &m.iName->iName, m.iName->iRefs)); |
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155 ReferenceRemoved(m.iName); |
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156 m.iName = name; |
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157 } |
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158 LOG(Log::Printf(_L("\tlocalhost mapped: <%u, %S(%d)>"), m.iId, &m.iName->iName, m.iName->iRefs)); |
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159 return KErrNone; |
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160 } |
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161 } |
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162 // Id was not recorded before this, create a new entry. |
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163 TRAP(err, iMap->AppendL(TLocalHostMap(aId, name))); |
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164 if (err == KErrNone) |
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165 { |
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166 LOG(Log::Printf(_L("\tlocalhost mapped: <%u, %S(%d)>"), aId, &name->iName, name->iRefs)); |
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167 return KErrNone; |
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168 } |
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169 } |
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170 ReferenceRemoved(name); |
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171 return err; |
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172 } |
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173 |
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174 |
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175 void THostNames::Unmap(TUint32 aId) |
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176 { |
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177 // |
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178 // Remove old mapping, if any |
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179 // |
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180 if (iMap) |
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181 { |
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182 for (TInt i = iMap->Count(); i > 0; ) |
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183 { |
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184 const TLocalHostMap &m = iMap->At(--i); |
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185 if (m.iId == aId) |
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186 { |
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187 LOG(Log::Printf(_L("\tlocalhost unmapped: <%u, %S(%d)>"), m.iId, &m.iName->iName, m.iName->iRefs)); |
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188 ReferenceRemoved(m.iName); |
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189 iMap->Delete(i); |
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190 break; // There can be only one matching id! |
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191 } |
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192 } |
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193 iMap->Compress(); |
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194 } |
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195 } |
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196 |
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197 const TDesC &THostNames::Find(TUint32 aId) const |
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198 { |
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199 if (iMap) |
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200 { |
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201 for (TInt i = iMap->Count(); i > 0; ) |
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202 { |
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203 const TLocalHostMap &m = iMap->At(--i); |
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204 if (m.iId == aId) |
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205 return m.iName->iName; |
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206 } |
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207 } |
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208 return KNullDesC; |
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209 } |
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210 |
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211 TInt THostNames::Reset(const TDesC &aLocalHost) |
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212 { |
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213 Cleanup(); |
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214 |
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215 // Define the return, when network id is not specified. |
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216 |
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217 Map(0, aLocalHost); |
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218 |
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219 // ---------------------------------------------- |
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220 // Insert here the code to scan the commdb and, |
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221 // for each pair <nid, name>, call Map(id, name). |
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222 // ---------------------------------------------- |
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223 TRAPD(err, GetCommDbDataL(0)); |
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224 |
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225 return err; |
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226 } |
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227 |
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228 TInt THostNames::Refresh(TUint32 aId) |
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229 { |
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230 TRAPD(err, GetCommDbDataL(aId)); |
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231 return err; |
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232 } |
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233 |
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234 |
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235 void THostNames::GetCommDbDataL(TUint32 aId) |
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236 { |
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237 #if defined(TCPIP6_USE_COMMDB) |
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238 # ifdef HOST_NAME |
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239 CCommsDatabase* db = CCommsDatabase::NewL(); |
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240 CleanupStack::PushL(db); |
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241 |
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242 CCommsDbTableView* view = db->OpenTableLC(TPtrC(NETWORK)); |
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243 for (TInt ret = view->GotoFirstRecord(); ret == KErrNone; ret = view->GotoNextRecord()) |
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244 { |
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245 THostName name; |
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246 TUint32 nid = 0; |
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247 TRAP(ret, |
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248 view->ReadTextL(TPtrC(HOST_NAME), name); |
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249 view->ReadUintL(TPtrC(COMMDB_ID), nid)); |
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250 if (ret == KErrNone) |
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251 Map(nid, name); |
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252 } |
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253 CleanupStack::PopAndDestroy(2); |
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254 #endif |
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255 #else |
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256 // . (not tested) |
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257 #ifdef SYMBIAN_NON_SEAMLESS_NETWORK_BEARER_MOBILITY |
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258 CMDBSession *dB = CMDBSession::NewLC(KCDVersion1_2); |
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259 #else |
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260 CMDBSession *dB = CMDBSession::NewLC(KCDVersion1_1); |
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261 #endif |
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262 |
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263 |
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264 // Reveal hidden or private IAP records if a licensee has chosen to protect a record |
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265 // using one of these flags - the API to do this is public so internal components |
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266 // have to support the use of such records. |
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267 dB->SetAttributeMask( ECDHidden | ECDPrivate ); |
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268 |
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269 CMDBRecordSet<CCDNetworkRecord> *networkTable; |
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270 networkTable = new (ELeave) CMDBRecordSet<CCDNetworkRecord>(KCDTIdNetworkRecord); |
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271 CleanupStack::PushL(networkTable); |
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272 networkTable->LoadL(*dB); |
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273 const TInt totalRecords = networkTable->iRecords.Count(); |
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274 for (TInt i = 0; i < totalRecords; ++i) |
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275 { |
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276 const TUint32 nid = (*networkTable)[i]->RecordId(); |
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277 if (aId == 0 || nid == aId) |
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278 Map(nid, (*networkTable)[i]->iHostName); |
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279 } |
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280 CleanupStack::PopAndDestroy(2); |
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281 #endif |
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282 } |