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<h1>BluetoothDiscovery.cc</h1><a href="BluetoothDiscovery_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright 2006 Baylor University</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment"> * you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment"> * You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment"> * </span>
<a name="l00008"></a>00008 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment"> * </span>
<a name="l00010"></a>00010 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment"> * See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment"> * limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"> */</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor"># include <<a class="code" href="dtn-config_8h.html">dtn-config.h</a>></span>
<a name="l00019"></a>00019 <span class="preprocessor">#endif</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <climits></span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#ifdef OASYS_BLUETOOTH_ENABLED</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <oasys/util/Random.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <oasys/bluez/Bluetooth.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <oasys/bluez/BluetoothSDP.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <oasys/bluez/BluetoothInquiry.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <oasys/util/OptParser.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="BundleDaemon_8h.html">bundling/BundleDaemon.h</a>"</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="BluetoothAnnounce_8h.html">BluetoothAnnounce.h</a>"</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="BluetoothDiscovery_8h.html">BluetoothDiscovery.h</a>"</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">namespace </span>dtn {
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keywordtype">void</span>
<a name="l00038"></a>00038 BluetoothDiscovery::shutdown()
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 shutdown_ = <span class="keyword">true</span>;
<a name="l00041"></a>00041 notifier_.notify();
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043
<a name="l00044"></a>00044 BluetoothDiscovery::BluetoothDiscovery(<span class="keyword">const</span> std::string& name)
<a name="l00045"></a>00045 : Discovery(name,<span class="stringliteral">"bt"</span>),
<a name="l00046"></a>00046 oasys::Thread(<span class="stringliteral">"BluetoothDiscovery"</span>),
<a name="l00047"></a>00047 notifier_(<span class="stringliteral">"/dtn/discovery/bt"</span>)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 oasys::Bluetooth::hci_get_bdaddr(&local_addr_);
<a name="l00050"></a>00050 shutdown_ = <span class="keyword">false</span>;
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keywordtype">bool</span>
<a name="l00054"></a>00054 BluetoothDiscovery::configure(<span class="keywordtype">int</span> argc, <span class="keyword">const</span> <span class="keywordtype">char</span>* argv[])
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (oasys::Thread::started())
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 log_warn(<span class="stringliteral">"reconfiguration of BluetoothDiscovery not supported"</span>);
<a name="l00059"></a>00059 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00062"></a>00062 oasys::OptParser p;
<a name="l00063"></a>00063 <span class="keyword">const</span> <span class="keywordtype">char</span>* invalid;
<a name="l00064"></a>00064 p.addopt(<span class="keyword">new</span> oasys::BdAddrOpt(<span class="stringliteral">"local_addr"</span>,&local_addr_));
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (! p.parse(argc,argv,&invalid))
<a name="l00066"></a>00066 {
<a name="l00067"></a>00067 log_err(<span class="stringliteral">"bad option: %s"</span>,invalid);
<a name="l00068"></a>00068 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 local_.assign(bd2str(local_addr_));
<a name="l00072"></a>00072
<a name="l00073"></a>00073 start();
<a name="l00074"></a>00074 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordtype">void</span>
<a name="l00078"></a>00078 BluetoothDiscovery::run()
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 oasys::BluetoothInquiry inquiry;
<a name="l00081"></a>00081 <span class="keywordflow">while</span> (! shutdown_)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 u_int <a class="code" href="dtnping_8c.html#e0c690118932b32ef40a74bb6a259acd">interval</a> = INT_MAX;
<a name="l00084"></a>00084 <span class="comment">// grab the minimum interval from registered CL's</span>
<a name="l00085"></a>00085 <span class="keywordflow">for</span> (iterator i = list_.begin(); i != list_.end(); i++)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 BluetoothAnnounce* announce = <span class="keyword">dynamic_cast<</span>BluetoothAnnounce*<span class="keyword">></span>(*i);
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (announce->interval_remaining() < interval)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 interval = announce->interval_remaining();
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 <span class="comment">// randomize the sleep time:</span>
<a name="l00094"></a>00094 <span class="comment">// the point is that two nodes with zero prior knowledge of each other</span>
<a name="l00095"></a>00095 <span class="comment">// need to be able to discover each other in a reasonably short time.</span>
<a name="l00096"></a>00096 <span class="comment">// if common practice is that all set their poll_interval to 1 or 30</span>
<a name="l00097"></a>00097 <span class="comment">// or x then there's the chance of synchronization or syncopation such</span>
<a name="l00098"></a>00098 <span class="comment">// that discovery doesn't happen.</span>
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (interval > 0)
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 u_int <a class="code" href="dtnsend_8cc.html#7f060ba264a025e4ae513e4244a6c497">sleep_time</a> = oasys::Random::rand(interval);
<a name="l00103"></a>00103 log_debug(<span class="stringliteral">"sleep time %d"</span>,sleep_time);
<a name="l00104"></a>00104
<a name="l00105"></a>00105 notifier_.wait(NULL,sleep_time);
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (shutdown_) <span class="keywordflow">break</span>;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">// initiate Bluetooth inquiry on local Bluetooth chipset</span>
<a name="l00111"></a>00111 <span class="comment">// this call blocks until inquiry is complete (10+ sec)</span>
<a name="l00112"></a>00112 <span class="keywordtype">int</span> nr = inquiry.inquire();
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="keywordflow">if</span> (shutdown_) <span class="keywordflow">break</span>;
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">// Polling instead of beaconing means that the act of polling</span>
<a name="l00117"></a>00117 <span class="comment">// satisfies everyone's interval, so reset them all</span>
<a name="l00118"></a>00118 <span class="keywordflow">for</span> (iterator i = list_.begin(); i != list_.end(); i++)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 BluetoothAnnounce* announce = <span class="keyword">dynamic_cast<</span>BluetoothAnnounce*<span class="keyword">></span>(*i);
<a name="l00121"></a>00121 announce->reset_interval();
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">if</span> (nr < 0) <span class="keywordflow">continue</span>; <span class="comment">// nobody's around</span>
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="comment">// iterate over discovered neighbors</span>
<a name="l00127"></a>00127 bdaddr_t remote;
<a name="l00128"></a>00128 <span class="keywordflow">while</span> (inquiry.next(remote) != -1)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">// query for DTN to remote host's SDP daemon</span>
<a name="l00132"></a>00132 oasys::BluetoothServiceDiscoveryClient sdpclient;
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (sdpclient.is_dtn_router(remote))
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 std::string nexthop(bd2str(remote));
<a name="l00136"></a>00136 EndpointID eid = sdpclient.remote_eid();
<a name="l00137"></a>00137 log_info(<span class="stringliteral">"discovered DTN peer %s at %s channel %d"</span>,eid.c_str(),
<a name="l00138"></a>00138 nexthop.c_str(),sdpclient.channel());
<a name="l00139"></a>00139 handle_neighbor_discovered(<span class="stringliteral">"bt"</span>,nexthop,eid);
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="keywordflow">if</span> (shutdown_) <span class="keywordflow">break</span>;
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 } <span class="comment">// dtn</span>
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="preprocessor">#endif // OASYS_BLUETOOTH_ENABLED</span>
</pre></div></div>
<hr size="1"><address style="text-align: right;"><small>Generated on Fri Jan 30 09:26:52 2009 for DTN Reference Implementation by
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