author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 26 Jan 2010 15:23:49 +0200 | |
changeset 0 | af10295192d8 |
permissions | -rw-r--r-- |
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// ipaddress.cpp - Basic IP address class for IPSEC use |
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// @internalComponent for IPSEC |
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// |
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#include "ipaddress.h" |
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TInt TIpAddress::operator==(const TIpAddress &aAddr) const |
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/** |
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* Equality operator. |
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* |
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* Two TIpAddress are equal if the TIp6Addr part matches |
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* exactly (TIp6addr::IsEqual()), and either scope id's |
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* are equal or either one is zero, which acts as a wild |
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* card. |
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* |
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* @param aAddr The other address. |
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*/ |
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{ |
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// iScope == 0 acting as a "wildcard" is *DUBIOUS* for == operator. need to check -- msa |
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return IsEqual(aAddr) && (iScope == aAddr.iScope || iScope == 0 || aAddr.iScope == 0); |
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} |
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TBool TIpAddress::operator<=(const TIpAddress &aAddr) const |
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/** |
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* Relation operator. |
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* |
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* The presense of the scope confuse the issue. The nature of the |
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* scope id is such, that only exact equality test makes sense. |
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* |
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* Thus, the "<=" is true if one address is less or equal to the |
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* other, and if scope ids are equal or either one is zero, which acts |
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* as a wild card. |
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* |
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* Thus, EFalse return does not mean that the other address |
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* is "larger", e.g. it is possible that |
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* @code (addr1 <= addr2 || addr2 <= addr1) |
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* @endcode |
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* is false; addresses are not comparable (because scope ids do not match). |
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*/ |
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{ |
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return |
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(iScope == 0 || aAddr.iScope == 0 || iScope == aAddr.iScope) && |
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Mem::Compare(&u.iAddr8[0], 16, &aAddr.u.iAddr8[0], 16) <= 0; |
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} |
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TInt TIpAddress::operator!=(const TIpAddress &aAddr) const |
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{ |
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return ! (*this == aAddr); |
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} |
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TBool TIpAddress::IsEqMask(const TIpAddress &aAddr, const TIpAddress &aMask) const |
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/** |
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* Compare address under mask. |
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* |
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* Tests if |
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* @code (*this & aMask) == (aAddr & aMask) |
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* @endcode |
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* is true. |
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* |
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* @param aAddr The other address. |
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* @param aMask The mask. |
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* @return ETrue, if equal. |
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*/ |
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{ |
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return |
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((u.iAddr32[0] ^ aAddr.u.iAddr32[0]) & aMask.u.iAddr32[0]) == 0 && |
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((u.iAddr32[1] ^ aAddr.u.iAddr32[1]) & aMask.u.iAddr32[1]) == 0 && |
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((u.iAddr32[2] ^ aAddr.u.iAddr32[2]) & aMask.u.iAddr32[2]) == 0 && |
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((u.iAddr32[3] ^ aAddr.u.iAddr32[3]) & aMask.u.iAddr32[3]) == 0 && |
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((iScope ^ aAddr.iScope) & aMask.iScope) == 0; |
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} |
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|
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TBool TIpAddress::IsMulticast() const |
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/** |
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* Test if address is multicast address. |
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* |
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* The base class TIp6Addr::IsMulticast() returns true only for |
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* real IPv6 multicast addresses. This function expands the test |
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* to work also for IPv4 multicast addresses, which are stored |
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* as IPv4 mapped format. |
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* |
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* @return True, if address is multicast (IPv4 or IPv6). |
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*/ |
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{ |
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static const union {TUint8 a[4]; TUint32 b;} v4Prefix = { {0, 0, 0xff, 0xff} }; |
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// TRUE, if real IPv6 multicast |
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if (TIp6Addr::IsMulticast()) |
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return TRUE; |
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// |
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// Otherwise, return TRUE, if address is the IPv4 |
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105 |
// multicast address. |
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106 |
return |
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107 |
u.iAddr32[0] == 0 && |
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108 |
u.iAddr32[1] == 0 && |
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u.iAddr32[2] == v4Prefix.b && |
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(u.iAddr8[12] & 0xF0) == 0xE0; |
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111 |
} |
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112 |
|
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113 |
|
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114 |
TInt TIpAddress::SetAddress(const TDesC &aStr, TInt aMask) |
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115 |
/** |
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116 |
* Set address from a string |
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117 |
* |
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118 |
* Take a string as a parameter and attempt to parse this as |
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119 |
* an IP address. |
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120 |
* |
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121 |
* The aMask setting is needed when IP address is used |
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* as a bit mask. IPv4 addresses are expanded into IPv4 mapped format. |
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123 |
* This would not work right when address is used as a mask, and thus a |
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* special flag is required. |
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125 |
* |
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126 |
* @param aStr Literal IPv4 or IPv6 address |
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* @param aMask Non-zero, if address is to be used as a bitmask |
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* @return KErrNone, if address literal was valid. |
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129 |
*/ |
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130 |
{ |
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131 |
TInetAddr addr; |
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const TInt ret = addr.Input(aStr); |
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if (ret == KErrNone) |
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134 |
return aMask ? SetMask(addr) : SetAddress(addr); |
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135 |
return ret; |
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136 |
} |
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137 |
|
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138 |
TInt TIpAddress::SetMask(const TSockAddr &aAddr) |
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139 |
/** |
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140 |
* Set address to be used as a mask. |
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141 |
* |
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142 |
* This function is needed. when aAddr contains a IPv4 |
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143 |
* address. The resulting IPv4 mapped format would not |
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144 |
* be usable as mask bits, and the high order bits must |
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145 |
* also be set. |
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146 |
* |
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147 |
* @param aAddr The mask |
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148 |
* @return KErrNone |
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149 |
*/ |
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150 |
{ |
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151 |
const TInetAddr &addr = TInetAddr::Cast(aAddr); |
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152 |
|
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153 |
if (addr.Family() == KAfInet || addr.IsV4Mapped()) |
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154 |
{ |
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155 |
// Loading IPv4 address requires some extra shuffles.. |
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156 |
SetAddress(addr.Address()); |
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157 |
// When an IPv4 address intended to be a mask is converted |
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158 |
// to IPv6 address, the rest of IPv6 address bits must |
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159 |
// be set to all ones too. |
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160 |
u.iAddr32[0] = ~0U; |
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161 |
u.iAddr32[1] = ~0U; |
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162 |
u.iAddr32[2] = ~0U; |
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163 |
} |
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164 |
else |
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165 |
(TIp6Addr &)*this = addr.Ip6Address(); |
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166 |
iScope = addr.Scope(); |
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167 |
return KErrNone; |
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168 |
} |
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169 |
|
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170 |
TInt TIpAddress::SetAddress(const TSockAddr &aAddr) |
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171 |
/** |
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172 |
* Set address. |
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173 |
* |
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174 |
* @param aAddr The address. |
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175 |
* @return KErrNone |
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176 |
*/ |
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177 |
{ |
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178 |
const TInetAddr &addr = TInetAddr::Cast(aAddr); |
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179 |
if (addr.Family() == KAfInet) |
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180 |
// Loading IPv4 address requires some extra shuffles.. |
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181 |
SetAddress(addr.Address()); |
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182 |
else |
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183 |
{ |
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184 |
(TIp6Addr &)*this = addr.Ip6Address(); |
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185 |
} |
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186 |
iScope = addr.Scope(); |
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187 |
return KErrNone; |
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188 |
} |
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189 |
|
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190 |
void TIpAddress::SetAddressNone() |
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191 |
/** |
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192 |
* Set address to none. |
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193 |
* |
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194 |
* Fill with zeroes. |
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195 |
*/ |
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196 |
{ |
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197 |
(TIp6Addr &)*this = KInet6AddrNone; |
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198 |
iScope = 0; |
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199 |
} |
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200 |
|
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201 |
void TIpAddress::SetAddress(const TIp6Addr &aAddr, const TUint32 aScope) |
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202 |
/** |
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203 |
* Set address. |
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204 |
* |
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205 |
* @param aAddr The IPv6 address |
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206 |
* @param aScope The scope id. |
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207 |
*/ |
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208 |
{ |
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209 |
(TIp6Addr &)*this = aAddr; |
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210 |
iScope = aScope; |
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211 |
} |
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void TIpAddress::SetAddress(const TUint32 aAddr) |
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/** |
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* Set address. |
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* |
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* Set address from IPv4 address. |
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* |
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* @param aAddr The IPv4 address |
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*/ |
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{ |
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u.iAddr32[0] = 0; |
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u.iAddr32[1] = 0; |
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u.iAddr8[8] = 0; |
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u.iAddr8[9] = 0; |
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u.iAddr8[10] = 0xff; |
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u.iAddr8[11] = 0xff; |
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u.iAddr8[12] = (TUint8)(aAddr >> 24); |
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u.iAddr8[13] = (TUint8)(aAddr >> 16); |
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u.iAddr8[14] = (TUint8)(aAddr >> 8); |
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u.iAddr8[15] = (TUint8)aAddr; |
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// The scope id is not set? should clear it? |
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} |
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