author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 15 Jan 2010 08:13:17 +0200 | |
changeset 0 | 29b1cd4cb562 |
permissions | -rw-r--r-- |
0
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Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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// Copyright (c) 2004-2009 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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// |
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|
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/** |
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@file |
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@internalComponent |
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*/ |
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|
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#include <bluetooth/logger.h> |
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#include <e32std.h> |
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#include "CNetTypeFilterTable.h" |
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|
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#ifdef __FLOG_ACTIVE |
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_LIT8(KLogComponent, LOG_COMPONENT_PAN_BNEP); |
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#endif |
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|
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/** |
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Always guarantee the state of the table. |
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@internalComponent |
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*/ |
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CNetTypeFilterTable::CNetTypeFilterTable() |
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:iCtr(0) |
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{ |
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} |
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|
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/** |
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Testing the validity of the supplied protocol |
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@param aProtocol The protocol to be tested |
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@return ETrue if the protocol is filtered out, EFalse if the protocol is not filtered out. |
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@internalComponent |
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*/ |
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TBool CNetTypeFilterTable::FilteredOut (const TUint16 aProtocol) |
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{ |
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LOG_FUNC |
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LOG1(_L8("Checking %04x"),aProtocol); |
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TBool retval = ETrue; |
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TUint aCtr; |
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if(!iCtr) // No filters set, so we let everything through. |
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{ |
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retval = EFalse; |
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} |
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else |
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{ |
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for(aCtr = 0; aCtr < iCtr; ++aCtr) |
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{ |
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if(aProtocol < iTable[2*aCtr]) |
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{ |
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// The table is sorted, so that if the start value exceeds |
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// the candidate value then the search should be terminated. |
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break; |
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} |
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else |
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{ |
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if((aProtocol >= iTable[2*aCtr]) && |
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(aProtocol <= iTable[2*aCtr+1])) |
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{ |
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// This is within the specified range so we can |
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// set the return to false and stop searching. |
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retval = EFalse; |
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break; |
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} |
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} |
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} |
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} |
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return retval; |
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} |
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|
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/** |
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Insert a filter specification into the table. |
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|
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@note aEnd must be greater than or equal to (>=) aStart or the method will leave. |
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If an attempt is made to add a filter range beyond the capacity of the table |
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(KMaxNetTypeFilters) the method will also leave. |
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@param aStart start of the protocol range that may be passed through this filter (inclusive). |
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@param aEnd end of the protocol range that may be passed through this filter (inclusive). |
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@internalComponent |
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*/ |
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TInt CNetTypeFilterTable::Insert (const TUint16 aStart, const TUint16 aEnd) |
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{ |
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LOG_FUNC |
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LOG2(_L8("Start %04x End %04x"),aStart, aEnd); |
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if(KMaxNetTypeFilters == iCtr) |
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{ |
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// Attempting to add too many filters. We don't allow that. |
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LOG(_L8("Attempting to exceed KMaxMultiAddrFilters")); |
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return KErrTooBig; |
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} |
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if(aEnd < aStart) |
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{ |
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// This should never happen, in that it should be caught |
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// by higher-level logic, but just in case ... |
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LOG(_L8("End of range less than start")); |
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return KErrArgument; |
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106 |
} |
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if(!iCtr) |
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108 |
{ |
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iTable[0] = aStart; // First insertion so we always insert at the "top" |
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iTable[1] = aEnd; |
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LOG2(_L8("First entry - Start %04x End %04x"),iTable[0],iTable[1]); |
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++iCtr; |
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113 |
} |
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114 |
else |
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115 |
{ |
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// Okay, we already have entries so we need to do an insertion sort. |
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// It may not be efficient but we don't have to do it often and |
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// it leaves the table in a suitable state for efficient searching. |
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119 |
TUint aCtr; |
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for(aCtr = 0; aCtr < iCtr-1; ++aCtr) |
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121 |
{ |
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if(aStart < iTable[2*aCtr]) |
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123 |
{ |
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// We've found a place in the middle of the table in which we should |
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// insert, so we have to shuffle the lower end down a bit to |
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// free up a slot. |
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TUint bCtr; |
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for(bCtr = KMaxNetTypeFilters - 1; bCtr > aCtr; --bCtr) |
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129 |
{ |
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iTable[2*bCtr] = iTable[2*(bCtr-1)]; |
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iTable[2*bCtr+1] = iTable[2*(bCtr-1)+1]; |
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} |
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// Now our insertion slot is free for our new values. |
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iTable[2*aCtr] = aStart; |
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iTable[2*aCtr+1] = aEnd; |
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LOG3(_L8("Entry %d - Start %04x End %04x"),aCtr,iTable[2*aCtr],iTable[2*aCtr+1]); |
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++iCtr; |
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return KErrNone; |
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139 |
} |
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140 |
} |
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// If we get here then we didn't find an address range that started |
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// later than this one, so we can insert at the "bottom". |
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iTable[2*iCtr] = aStart; |
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iTable[2*iCtr+1] = aEnd; |
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LOG3(_L8("Entry %d - Start %04x End %04x"),iCtr,iTable[2*iCtr],iTable[2*iCtr+1]); |
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++iCtr; |
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} |
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return KErrNone; |
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} |
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150 |
|
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151 |
/** |
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Resets the filter table counter to zero. All table values default to |
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range 0x0000 to 0xffff which is the same as saying that all protocols |
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are valid. This ensures that if the table is used incorrectly after |
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being reset, the effect will be the same as if a filter had not been set. |
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@internalComponent |
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*/ |
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void CNetTypeFilterTable::Reset () |
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{ |
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LOG_FUNC |
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//if(iCtr) |
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// { |
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// TUint aCtr; |
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// for(aCtr = 0; aCtr < iCtr; ++aCtr) |
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// { |
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// iTable[2*aCtr] = 0x0000; |
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// iTable[2*aCtr+1] = 0xffff; |
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// } |
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// } |
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iCtr = 0; |
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171 |
} |