Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/btdiscoverer_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/ForumNokia/ThreadAndActiveObjectsEx/src/btdiscoverer.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright © 2008 Nokia Corporation.</span>
<a name="l00003"></a>00003 <span class="comment"> */</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005
<a name="l00006"></a>00006 <span class="comment">// INCLUDES</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "..\inc\btdiscoverer.h"</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "SharedIntermediator.h"</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include "BluetoothInfo.h"</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="preprocessor">#include <btmanclient.h></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <btextnotifiers.h></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <aknlists.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#include <btsdp.h></span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include <bt_sock.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <BTDevice.h></span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KBTProtocol, <span class="stringliteral">"BTLinkManager"</span>);
<a name="l00020"></a>00020 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KLine, <span class="stringliteral">"-"</span> );
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="keyword">const</span> TInt KMinBTAddressLength = 5;
<a name="l00023"></a>00023 <span class="keyword">const</span> TInt KBufSize = 32;
<a name="l00024"></a>00024 <span class="keyword">const</span> TInt KAddressBufSize = 1024;
<a name="l00025"></a>00025 <span class="keyword">const</span> TInt KConversionChars = 2;
<a name="l00026"></a>00026
<a name="l00027"></a><a class="code" href="class_c_b_t_discoverer.html#aeb9e85e706210e0cb6a570d6c02e38b1">00027</a> <a class="code" href="class_c_b_t_discoverer.html">CBTDiscoverer</a>* <a class="code" href="class_c_b_t_discoverer.html#aeb9e85e706210e0cb6a570d6c02e38b1">CBTDiscoverer::NewL</a>(<a class="code" href="class_c_shared_intermediator.html">CSharedIntermediator</a>* aSMediator)
<a name="l00028"></a>00028 {
<a name="l00029"></a>00029 <a class="code" href="class_c_b_t_discoverer.html">CBTDiscoverer</a>* <span class="keyword">self</span> = <a class="code" href="class_c_b_t_discoverer.html#a58071dd68fb5238804af2680639d0ede">CBTDiscoverer::NewLC</a>(aSMediator);
<a name="l00030"></a>00030 CleanupStack::Pop(<span class="keyword">self</span>);
<a name="l00031"></a>00031 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00032"></a>00032 }
<a name="l00033"></a>00033
<a name="l00034"></a><a class="code" href="class_c_b_t_discoverer.html#a58071dd68fb5238804af2680639d0ede">00034</a> <a class="code" href="class_c_b_t_discoverer.html">CBTDiscoverer</a>* <a class="code" href="class_c_b_t_discoverer.html#a58071dd68fb5238804af2680639d0ede">CBTDiscoverer::NewLC</a>( <a class="code" href="class_c_shared_intermediator.html">CSharedIntermediator</a>* aSMediator )
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 <a class="code" href="class_c_b_t_discoverer.html">CBTDiscoverer</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_b_t_discoverer.html">CBTDiscoverer</a>( aSMediator );
<a name="l00037"></a>00037 CleanupStack::PushL( <span class="keyword">self</span> );
<a name="l00038"></a>00038 <span class="keyword">self</span>->ConstructL();
<a name="l00039"></a>00039 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00043"></a>00043 <span class="comment">// CBTDiscoverer::CBTDiscoverer()</span>
<a name="l00044"></a>00044 <span class="comment">//</span>
<a name="l00045"></a>00045 <span class="comment">// Constructor.</span>
<a name="l00046"></a>00046 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00047"></a>00047 CBTDiscoverer::CBTDiscoverer( <a class="code" href="class_c_shared_intermediator.html">CSharedIntermediator</a>* aSMediator )
<a name="l00048"></a>00048 : CActive( EPriorityStandard ), iSMediator ( aSMediator )
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00053"></a>00053 <span class="comment">// CBTDiscoverer::CBTDiscoverer()</span>
<a name="l00054"></a>00054 <span class="comment">//</span>
<a name="l00055"></a>00055 <span class="comment">// Destructor.</span>
<a name="l00056"></a>00056 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00057"></a><a class="code" href="class_c_b_t_discoverer.html#af86425f13d92e3ac8a57cc345dd29f0b">00057</a> <a class="code" href="class_c_b_t_discoverer.html#af86425f13d92e3ac8a57cc345dd29f0b">CBTDiscoverer::~CBTDiscoverer</a>()
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 Cancel();
<a name="l00060"></a>00060
<a name="l00061"></a>00061 iDeviceNames->ResetAndDestroy();
<a name="l00062"></a>00062 <span class="keyword">delete</span> iDeviceNames;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 iDeviceAddress->ResetAndDestroy();
<a name="l00065"></a>00065 <span class="keyword">delete</span> iDeviceAddress;
<a name="l00066"></a>00066
<a name="l00067"></a>00067 iInqSockAddrArray.Close();
<a name="l00068"></a>00068 iHostResolver.Close();
<a name="l00069"></a>00069 iSocketServer.Close();
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// Standard Symbian OS 2nd phase constructor</span>
<a name="l00073"></a>00073 <span class="keywordtype">void</span> CBTDiscoverer::ConstructL()
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 iDeviceNames = <span class="keyword">new</span> (ELeave) CArrayPtrFlat<HBufC>(1);
<a name="l00076"></a>00076 iDeviceAddress = <span class="keyword">new</span> (ELeave) CArrayPtrFlat<HBufC>(1);
<a name="l00077"></a>00077
<a name="l00078"></a>00078 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00081"></a>00081 <span class="comment">// CBTDiscoverer::GetNames()</span>
<a name="l00082"></a>00082 <span class="comment">//</span>
<a name="l00083"></a>00083 <span class="comment">// Return a pointer to list of names.</span>
<a name="l00084"></a>00084 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00085"></a><a class="code" href="class_c_b_t_discoverer.html#a0dc7ee9d24b57d97b6825eeaa2d08d59">00085</a> CArrayPtrFlat< HBufC >* <a class="code" href="class_c_b_t_discoverer.html#a0dc7ee9d24b57d97b6825eeaa2d08d59">CBTDiscoverer::GetNames</a>()
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="keywordflow">return</span> iDeviceNames;
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00091"></a>00091 <span class="comment">// CBTDiscoverer::GetDeviceAddress()</span>
<a name="l00092"></a>00092 <span class="comment">//</span>
<a name="l00093"></a>00093 <span class="comment">// Return a pointer to list of addresses.</span>
<a name="l00094"></a>00094 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00095"></a><a class="code" href="class_c_b_t_discoverer.html#ace1adacff37ad877f1f5a1f87f617b1c">00095</a> CArrayPtrFlat< HBufC >* <a class="code" href="class_c_b_t_discoverer.html#ace1adacff37ad877f1f5a1f87f617b1c">CBTDiscoverer::GetDeviceAddress</a>()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <span class="keywordflow">return</span> iDeviceAddress;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00101"></a>00101 <span class="comment">// CBTDiscoverer::StartDiscoveringDevicesL()</span>
<a name="l00102"></a>00102 <span class="comment">//</span>
<a name="l00103"></a>00103 <span class="comment">// Find devices.</span>
<a name="l00104"></a>00104 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00105"></a><a class="code" href="class_c_b_t_discoverer.html#a883d57ae3cd27e92a2c90a5d304f38e6">00105</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_t_discoverer.html#a883d57ae3cd27e92a2c90a5d304f38e6">CBTDiscoverer::StartDiscoveringDevicesL</a>()
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 User::LeaveIfError(iSocketServer.Connect() );
<a name="l00108"></a>00108
<a name="l00109"></a>00109 TProtocolDesc protocolInfo;
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">// Gets the description of a protocol by name.</span>
<a name="l00112"></a>00112 User::LeaveIfError(iSocketServer.FindProtocol(
<a name="l00113"></a>00113 KBTProtocol(), protocolInfo) );
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">// Initialises a name resolution service provided by a particular protocol. </span>
<a name="l00116"></a>00116 <span class="comment">// It must be called before other object functions are used.</span>
<a name="l00117"></a>00117 User::LeaveIfError( iHostResolver.Open( iSocketServer,
<a name="l00118"></a>00118 protocolInfo.iAddrFamily, protocolInfo.iProtocol ) );
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// Interested in all bluetooth devices that have BT turned on.</span>
<a name="l00121"></a>00121 iSockAddr.SetIAC(KGIAC);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// Resolve name of the device and device address. Do not use cache.</span>
<a name="l00124"></a>00124 iSockAddr.SetAction(KHostResInquiry | KHostResName | KHostResIgnoreCache);
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="comment">// Start discovering devices asynchronously. RunL is called.</span>
<a name="l00127"></a>00127 iHostResolver.GetByAddress(iSockAddr,iNameEntry,iStatus);
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">// Set this active object active.</span>
<a name="l00130"></a>00130 SetActive();
<a name="l00131"></a>00131
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00135"></a>00135 <span class="comment">// CBTDiscoverer::RunL()</span>
<a name="l00136"></a>00136 <span class="comment">//</span>
<a name="l00137"></a>00137 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00138"></a>00138 <span class="keywordtype">void</span> CBTDiscoverer::RunL()
<a name="l00139"></a>00139 {
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// Found a new device, iStatus would be KErrHostResNoMoreResults</span>
<a name="l00142"></a>00142 <span class="comment">// if no more new devices are found.</span>
<a name="l00143"></a>00143 <span class="keywordflow">if</span> ( iStatus == KErrNone )
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 PushListL(iNameEntry);
<a name="l00146"></a>00146 <span class="comment">// Find the next bluetooth device</span>
<a name="l00147"></a>00147 iHostResolver.Next(iNameEntry,iStatus);
<a name="l00148"></a>00148
<a name="l00149"></a>00149 SetActive();
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00154"></a>00154 <span class="comment">// CBTDiscoverer::TransformSockAddressL(TInquirySockAddr& aInquirySockAddr)</span>
<a name="l00155"></a>00155 <span class="comment">//</span>
<a name="l00156"></a>00156 <span class="comment">// Transform inquiryaddress to format XX-XX-XX-XX-XX (BT address)</span>
<a name="l00157"></a>00157 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00158"></a>00158 <span class="keywordtype">void</span> CBTDiscoverer::TransformSockAddressL(TInquirySockAddr& aInquirySockAddr)
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 TBTDevAddr localAddr= aInquirySockAddr.BTAddr();
<a name="l00161"></a>00161 TBuf<KAddressBufSize> btAddr;
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keywordflow">for</span>(TInt i=0; i < localAddr.Des().Length() ;i++)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 btAddr.AppendNumFixedWidthUC( localAddr[i], EHex, KConversionChars );
<a name="l00166"></a>00166 <span class="keywordflow">if</span> ( i != localAddr.Des().Length() -1 )
<a name="l00167"></a>00167 {
<a name="l00168"></a>00168 btAddr.Append( KLine );
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171
<a name="l00172"></a>00172 HBufC* element = HBufC::New(KBTDeviceAddress);
<a name="l00173"></a>00173 element = btAddr.Alloc();
<a name="l00174"></a>00174 iDeviceAddress->AppendL( element );
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00178"></a>00178 <span class="comment">// CBTDiscoverer::RunError(TInt aError)</span>
<a name="l00179"></a>00179 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00180"></a>00180 TInt CBTDiscoverer::RunError(TInt)
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 <span class="keywordflow">return</span> KErrNone;
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00186"></a>00186 <span class="comment">// CBTDiscoverer::DoCancel()</span>
<a name="l00187"></a>00187 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00188"></a>00188 <span class="keywordtype">void</span> CBTDiscoverer::DoCancel()
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 iHostResolver.Cancel();
<a name="l00191"></a>00191 }
<a name="l00192"></a>00192
<a name="l00193"></a>00193 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00194"></a>00194 <span class="comment">// CBTDiscoverer::PushListL(TNameEntry& aNameEntry) </span>
<a name="l00195"></a>00195 <span class="comment">//</span>
<a name="l00196"></a>00196 <span class="comment">// Separete both name/address from the aNameEntry and insert them into separe </span>
<a name="l00197"></a>00197 <span class="comment">// lists.</span>
<a name="l00198"></a>00198 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00199"></a>00199 <span class="keywordtype">void</span> CBTDiscoverer::PushListL(TNameEntry& aNameEntry)
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201
<a name="l00202"></a>00202 TInquirySockAddr &addr = TInquirySockAddr::Cast(aNameEntry().iAddr);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="comment">// Add only different devices. </span>
<a name="l00205"></a>00205 <span class="keywordflow">for</span>( TInt i = 0; i < iInqSockAddrArray.Count(); i++ )
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <span class="keywordflow">if</span>( iInqSockAddrArray[i].BTAddr() == addr.BTAddr( ) ||
<a name="l00208"></a>00208 addr.BTAddr().Des().Length() < KMinBTAddressLength )
<a name="l00209"></a>00209 {
<a name="l00210"></a>00210 <span class="keywordflow">return</span>;
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214 HBufC* element = NULL;
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="comment">// Check the length of the bluetooth device name</span>
<a name="l00217"></a>00217 <span class="keywordflow">if</span> ( aNameEntry().iName.Length() >= KBTDeviceLength )
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 element = aNameEntry().iName.Left( KBTDeviceLength -1 ).AllocLC();
<a name="l00220"></a>00220 }
<a name="l00221"></a>00221 <span class="comment">// Get the name </span>
<a name="l00222"></a>00222 <span class="keywordflow">else</span> {
<a name="l00223"></a>00223 element = aNameEntry().iName.AllocLC();
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225 <span class="comment">// Add the name onto the list. Devices must have some kind of name</span>
<a name="l00226"></a>00226 <span class="comment">// otherwise it won't be added.</span>
<a name="l00227"></a>00227 <span class="keywordflow">if</span> ( element->Length() != 0 )
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 iDeviceNames->AppendL( element );
<a name="l00230"></a>00230 CleanupStack::Pop( element );
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232
<a name="l00233"></a>00233 TInquirySockAddr *addr_ptr = <span class="keyword">new</span> (ELeave)TInquirySockAddr( addr );
<a name="l00234"></a>00234
<a name="l00235"></a>00235 CleanupStack::PushL( addr_ptr );
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="comment">// Append the BT address onto the list</span>
<a name="l00238"></a>00238 User::LeaveIfError( iInqSockAddrArray.Append(*addr_ptr) );
<a name="l00239"></a>00239 CleanupStack::Pop( addr_ptr );
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="comment">// Make address printable.</span>
<a name="l00242"></a>00242 TransformSockAddressL( *addr_ptr );
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="comment">// Get name of the device and BT address as hex. Add name&address</span>
<a name="l00245"></a>00245 <span class="comment">// into shared intermediator.</span>
<a name="l00246"></a>00246 TPtr16 deviceName = (*iDeviceNames)[ iDeviceNames->Count() - 1 ]->Des();
<a name="l00247"></a>00247 TPtr16 deviceBTAddr =
<a name="l00248"></a>00248 (*iDeviceAddress)[ iDeviceAddress->Count() - 1 ]->Des();
<a name="l00249"></a>00249 <a class="code" href="class_t_bluetooth_info.html">TBluetoothInfo</a> btInfo = <a class="code" href="class_t_bluetooth_info.html">TBluetoothInfo</a> (deviceName, deviceBTAddr);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="comment">// Give data to the shared intermediator. Shared intermediator gives</span>
<a name="l00252"></a>00252 <span class="comment">// device names to the listbox after this.</span>
<a name="l00253"></a>00253 iSMediator-><a class="code" href="class_c_shared_intermediator.html#a8c4ec9ad89fd0b9168c50472fa3e1ec7">AddBluetoothInfoL</a>(btInfo);
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00257"></a>00257 <span class="comment">// CBTDiscoverer::RefreshDevices()</span>
<a name="l00258"></a>00258 <span class="comment">//</span>
<a name="l00259"></a>00259 <span class="comment">// Cancels the wait for completion of an outstanding bluetooth request. </span>
<a name="l00260"></a>00260 <span class="comment">// Cleans lists and starts the search again by calling GetByAddress.</span>
<a name="l00261"></a>00261 <span class="comment">// ----------------------------------------------------------------------------</span>
<a name="l00262"></a><a class="code" href="class_c_b_t_discoverer.html#a025caeff179e22d835296e10b3387e6d">00262</a> <span class="keywordtype">void</span> <a class="code" href="class_c_b_t_discoverer.html#a025caeff179e22d835296e10b3387e6d">CBTDiscoverer::RefreshDevices</a>()
<a name="l00263"></a>00263 {
<a name="l00264"></a>00264 <span class="comment">// In case bt discover is already active.</span>
<a name="l00265"></a>00265 Cancel();
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="comment">//Clear all lists </span>
<a name="l00268"></a>00268 iDeviceNames->Reset();
<a name="l00269"></a>00269 iInqSockAddrArray.Reset();
<a name="l00270"></a>00270 iDeviceAddress->Reset();
<a name="l00271"></a>00271
<a name="l00272"></a>00272 iSockAddr.SetAction(KHostResInquiry | KHostResName | KHostResIgnoreCache);
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="comment">// Start discovering devices asynchronously. RunL is called afterwards.</span>
<a name="l00275"></a>00275 iHostResolver.GetByAddress(iSockAddr,iNameEntry,iStatus);
<a name="l00276"></a>00276 SetActive();
<a name="l00277"></a>00277 }
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