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libdtn-devel-2.6.0-2mdv2009.1.i586.rpm

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<h1>IPDiscovery.h</h1><a href="IPDiscovery_8h.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">#ifndef _IP_DISCOVERY_H_</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define _IP_DISCOVERY_H_</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include &lt;oasys/thread/Thread.h&gt;</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;oasys/thread/Notifier.h&gt;</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;oasys/io/NetUtils.h&gt;</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;oasys/io/UDPClient.h&gt;</span>
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="Discovery_8h.html">discovery/Discovery.h</a>"</span>
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 <span class="keyword">namespace </span>dtn {
<a name="l00028"></a>00028 
<a name="l00035"></a><a class="code" href="classdtn_1_1IPDiscovery.html">00035</a> <span class="keyword">class </span><a class="code" href="classdtn_1_1IPDiscovery.html" title="IPDiscovery is the main thread in IP-based neighbor discovery, configured via config...">IPDiscovery</a> : <span class="keyword">public</span> <a class="code" href="classdtn_1_1Discovery.html" title="Abstraction of neighbor discovery agent.">Discovery</a>,
<a name="l00036"></a>00036                     <span class="keyword">public</span> oasys::Thread
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="keyword">public</span>:
<a name="l00039"></a>00039 
<a name="l00044"></a><a class="code" href="classdtn_1_1IPDiscovery.html#545fd19e7aaca3eab08b4ff279fc63b4">00044</a>     <span class="keyword">static</span> <span class="keyword">const</span> u_int32_t <a class="code" href="classdtn_1_1IPDiscovery.html#545fd19e7aaca3eab08b4ff279fc63b4" title="If no other options are set for destination, default to sending to the IPv4 broadcast...">DEFAULT_DST_ADDR</a>;
<a name="l00045"></a>00045 
<a name="l00050"></a><a class="code" href="classdtn_1_1IPDiscovery.html#7f1787a9f154ff88952209924f02e273">00050</a>     <span class="keyword">static</span> <span class="keyword">const</span> u_int32_t <a class="code" href="classdtn_1_1IPDiscovery.html#7f1787a9f154ff88952209924f02e273" title="If no other options are set for source, use this as default local address.">DEFAULT_SRC_ADDR</a>;
<a name="l00051"></a>00051 
<a name="l00055"></a><a class="code" href="classdtn_1_1IPDiscovery.html#dacf3f66ee13744990d8cb0c54c37585">00055</a>     <span class="keyword">static</span> <span class="keyword">const</span> u_int <a class="code" href="classdtn_1_1IPDiscovery.html#dacf3f66ee13744990d8cb0c54c37585" title="If no other options are set for multicast TTL, set to 1.">DEFAULT_MCAST_TTL</a>;
<a name="l00056"></a>00056 
<a name="l00061"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html">00061</a>     <span class="keyword">struct </span><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html" title="On-the-wire (radio, whatever) representation of IP address family&amp;#39;s advertisement...">DiscoveryHeader</a>
<a name="l00062"></a>00062     {
<a name="l00063"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#9038613d6cdfb09f1abe18e512624e03">00063</a>         u_int8_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#9038613d6cdfb09f1abe18e512624e03">cl_type</a>;         <span class="comment">// Type of CL offered</span>
<a name="l00064"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#43234f76fc915ca6c1487a90d9e3cdfd">00064</a>         u_int8_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#43234f76fc915ca6c1487a90d9e3cdfd">interval</a>;        <span class="comment">// 100ms units</span>
<a name="l00065"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#3ebbf90531b836a4974bf7c0740da562">00065</a>         u_int16_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#3ebbf90531b836a4974bf7c0740da562">length</a>;         <span class="comment">// total length of packet</span>
<a name="l00066"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#35de104df839eade0f32f51efe1be229">00066</a>         u_int32_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#35de104df839eade0f32f51efe1be229">inet_addr</a>;      <span class="comment">// IPv4 address of CL</span>
<a name="l00067"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#1d4742f553c05c6d2da14befb570ea88">00067</a>         u_int16_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#1d4742f553c05c6d2da14befb570ea88">inet_port</a>;      <span class="comment">// IPv4 port of CL</span>
<a name="l00068"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#95d0c82c7bce1701f8d5ff423a24e09a">00068</a>         u_int16_t <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#95d0c82c7bce1701f8d5ff423a24e09a">name_len</a>;       <span class="comment">// length of EID</span>
<a name="l00069"></a><a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#537203fa7f52f4a19fa473cfac838fd4">00069</a>         <span class="keywordtype">char</span> <a class="code" href="structdtn_1_1IPDiscovery_1_1DiscoveryHeader.html#537203fa7f52f4a19fa473cfac838fd4">sender_name</a>[0];      <span class="comment">// DTN URI of beacon sender</span>
<a name="l00070"></a>00070     }
<a name="l00071"></a>00071     __attribute__((<a class="code" href="classdtn_1_1IPDiscovery.html#8f3f429b61a5a093b489aebb5b396cdd" title="On-the-wire (radio, whatever) representation of IP address family&amp;#39;s advertisement...">packed</a>));
<a name="l00072"></a>00072 
<a name="l00076"></a><a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d">00076</a>     <span class="keyword">typedef</span> <span class="keyword">enum</span>
<a name="l00077"></a>00077     {
<a name="l00078"></a><a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4da1050e8e6503c2c97a1bc73d6a81eef5">00078</a>         <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4da1050e8e6503c2c97a1bc73d6a81eef5">UNDEFINED</a> = 0,
<a name="l00079"></a><a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d6d63305412b48547e0769f25bb2829c9">00079</a>         <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d6d63305412b48547e0769f25bb2829c9">TCPCL</a>     = 1, <span class="comment">// TCP Convergence Layer</span>
<a name="l00080"></a><a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4dab0183b990af8abb3b948d2c35077ead">00080</a>         <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4dab0183b990af8abb3b948d2c35077ead">UDPCL</a>     = 2, <span class="comment">// UDP Convergence Layer</span>
<a name="l00081"></a>00081     }
<a name="l00082"></a>00082     <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d" title="Enumerate which type of CL is advertised.">cl_type_t</a>;
<a name="l00083"></a>00083 
<a name="l00084"></a><a class="code" href="classdtn_1_1IPDiscovery.html#b8d11e70af91ec4342bb5be2016de212">00084</a>     <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="classdtn_1_1IPDiscovery.html#b8d11e70af91ec4342bb5be2016de212">type_to_str</a>(<a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d" title="Enumerate which type of CL is advertised.">cl_type_t</a> t)
<a name="l00085"></a>00085     {
<a name="l00086"></a>00086         <span class="keywordflow">switch</span>(t) {
<a name="l00087"></a>00087             <span class="keywordflow">case</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d6d63305412b48547e0769f25bb2829c9">TCPCL</a>: <span class="keywordflow">return</span> <span class="stringliteral">"tcp"</span>;
<a name="l00088"></a>00088             <span class="keywordflow">case</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4dab0183b990af8abb3b948d2c35077ead">UDPCL</a>: <span class="keywordflow">return</span> <span class="stringliteral">"udp"</span>;
<a name="l00089"></a>00089             <span class="keywordflow">case</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4da1050e8e6503c2c97a1bc73d6a81eef5">UNDEFINED</a>:
<a name="l00090"></a>00090             <span class="keywordflow">default</span>: PANIC(<span class="stringliteral">"Undefined cl_type_t %d"</span>,t);
<a name="l00091"></a>00091         }
<a name="l00092"></a>00092         NOTREACHED;
<a name="l00093"></a>00093     }
<a name="l00094"></a>00094 
<a name="l00095"></a><a class="code" href="classdtn_1_1IPDiscovery.html#f3bcef2eded36d54a1411992bebc058c">00095</a>     <span class="keyword">static</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d" title="Enumerate which type of CL is advertised.">cl_type_t</a> <a class="code" href="classdtn_1_1IPDiscovery.html#f3bcef2eded36d54a1411992bebc058c">str_to_type</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* cltype)
<a name="l00096"></a>00096     {
<a name="l00097"></a>00097         <span class="keywordflow">if</span> (strncmp(cltype,<span class="stringliteral">"tcp"</span>,3) == 0)
<a name="l00098"></a>00098             <span class="keywordflow">return</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4d6d63305412b48547e0769f25bb2829c9">TCPCL</a>;
<a name="l00099"></a>00099         <span class="keywordflow">else</span>
<a name="l00100"></a>00100         <span class="keywordflow">if</span> (strncmp(cltype,<span class="stringliteral">"udp"</span>,3) == 0)
<a name="l00101"></a>00101             <span class="keywordflow">return</span> <a class="code" href="classdtn_1_1IPDiscovery.html#dba811f3518ddee9d6e16317af505e4dab0183b990af8abb3b948d2c35077ead">UDPCL</a>;
<a name="l00102"></a>00102         <span class="keywordflow">else</span>
<a name="l00103"></a>00103             PANIC(<span class="stringliteral">"Unsupported CL type %s"</span>,cltype);
<a name="l00104"></a>00104         NOTREACHED;
<a name="l00105"></a>00105     }
<a name="l00106"></a>00106 
<a name="l00110"></a><a class="code" href="classdtn_1_1IPDiscovery.html#94633c542ce6d031e5583899e0496f00">00110</a>     <span class="keywordtype">void</span> <a class="code" href="classdtn_1_1IPDiscovery.html#94633c542ce6d031e5583899e0496f00" title="Close main socket, causing thread to exit.">shutdown</a>() { <a class="code" href="classdtn_1_1IPDiscovery.html#004f9f774345cd25eb73ea4558b86bd7" title="signal to close down thread">shutdown_</a> = <span class="keyword">true</span>; <a class="code" href="classdtn_1_1IPDiscovery.html#d2d28582fc8830ca107cc07aa9b79a5e" title="the socket for beacons in- and out-bound">socket_</a>.get_notifier()-&gt;notify(); }
<a name="l00111"></a>00111 
<a name="l00112"></a><a class="code" href="classdtn_1_1IPDiscovery.html#79f93179608551c7c8b2bd8310e979cd">00112</a>     <span class="keyword">virtual</span> <a class="code" href="classdtn_1_1IPDiscovery.html#79f93179608551c7c8b2bd8310e979cd">~IPDiscovery</a>() {}
<a name="l00113"></a>00113 
<a name="l00114"></a>00114 <span class="keyword">protected</span>:
<a name="l00115"></a><a class="code" href="classdtn_1_1IPDiscovery.html#135e7ff6ba537b610e4d0db2968d9a2a">00115</a>     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdtn_1_1Discovery.html" title="Abstraction of neighbor discovery agent.">Discovery</a>;
<a name="l00116"></a>00116 
<a name="l00117"></a>00117     <a class="code" href="classdtn_1_1IPDiscovery.html#ac1eecdacc9c8cc817b1fe781d4b8310">IPDiscovery</a>(<span class="keyword">const</span> std::string&amp; <a class="code" href="classdtn_1_1Discovery.html#28f6c94d28520370db8c09c8b5881b8f" title="Name of this Discovery instance.">name</a>);
<a name="l00118"></a>00118 
<a name="l00123"></a>00123     <span class="keywordtype">bool</span> <a class="code" href="classdtn_1_1IPDiscovery.html#3705ccea8c5e02f26aa9082a0bcca0c8" title="Set internal state using parameter list; return true on success, else false.">configure</a>(<span class="keywordtype">int</span> argc, <span class="keyword">const</span> <span class="keywordtype">char</span>* argv[]);
<a name="l00124"></a>00124 
<a name="l00128"></a>00128     <span class="keywordtype">void</span> <a class="code" href="classdtn_1_1IPDiscovery.html#4ba6e7fe4ee9f19945b4c1aaf7d7ab8a" title="virtual from oasys::Thread">run</a>();
<a name="l00129"></a>00129 
<a name="l00134"></a>00134     <span class="keywordtype">bool</span> <a class="code" href="classdtn_1_1IPDiscovery.html#ac535bfa53ab2daf771e65c48db9781c" title="Convenience method to pull the relevant items out of the inbound packet.">parse_advertisement</a>(u_char* <a class="code" href="num2sdnv_8c.html#a81cdcc7ff6987bc85c073253e32715f">buf</a>, <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>,
<a name="l00135"></a>00135                              in_addr_t remote_addr,
<a name="l00136"></a>00136                              u_int8_t&amp; cl_type,
<a name="l00137"></a>00137                              std::string&amp; nexthop,
<a name="l00138"></a>00138                              <a class="code" href="classdtn_1_1EndpointID.html">EndpointID</a>&amp; remote_eid);
<a name="l00139"></a>00139 
<a name="l00143"></a><a class="code" href="classdtn_1_1IPDiscovery.html#f111297820476cf22fc94d9bcd1a0b4b">00143</a>     <span class="keywordtype">void</span> <a class="code" href="classdtn_1_1IPDiscovery.html#f111297820476cf22fc94d9bcd1a0b4b" title="Virtual from Discovery.">handle_announce</a>()
<a name="l00144"></a>00144     {
<a name="l00145"></a>00145         <a class="code" href="classdtn_1_1IPDiscovery.html#d2d28582fc8830ca107cc07aa9b79a5e" title="the socket for beacons in- and out-bound">socket_</a>.get_notifier()-&gt;notify();
<a name="l00146"></a>00146     }
<a name="l00147"></a>00147 
<a name="l00148"></a><a class="code" href="classdtn_1_1IPDiscovery.html#004f9f774345cd25eb73ea4558b86bd7">00148</a>     <span class="keyword">volatile</span> <span class="keywordtype">bool</span> <a class="code" href="classdtn_1_1IPDiscovery.html#004f9f774345cd25eb73ea4558b86bd7" title="signal to close down thread">shutdown_</a>; 
<a name="l00149"></a><a class="code" href="classdtn_1_1IPDiscovery.html#45216229a536034944802a1bf0e3f866">00149</a>     in_addr_t <a class="code" href="classdtn_1_1IPDiscovery.html#45216229a536034944802a1bf0e3f866" title="address for bind() to receive beacons">local_addr_</a>;   
<a name="l00150"></a><a class="code" href="classdtn_1_1IPDiscovery.html#54a253ff502020915fa2521ca9a83e3e">00150</a>     u_int16_t <a class="code" href="classdtn_1_1IPDiscovery.html#54a253ff502020915fa2521ca9a83e3e" title="local and remote">port_</a>;         
<a name="l00151"></a><a class="code" href="classdtn_1_1IPDiscovery.html#92c069ec1b1e15bad6cf52d926442213">00151</a>     in_addr_t <a class="code" href="classdtn_1_1IPDiscovery.html#92c069ec1b1e15bad6cf52d926442213" title="whether unicast, multicast, or broadcast">remote_addr_</a>;  
<a name="l00152"></a><a class="code" href="classdtn_1_1IPDiscovery.html#83213d3cb154802ff76e9b07763b95d3">00152</a>     u_int <a class="code" href="classdtn_1_1IPDiscovery.html#83213d3cb154802ff76e9b07763b95d3" title="TTL hop count for multicast option.">mcast_ttl_</a>;        
<a name="l00153"></a><a class="code" href="classdtn_1_1IPDiscovery.html#d2d28582fc8830ca107cc07aa9b79a5e">00153</a>     oasys::UDPClient <a class="code" href="classdtn_1_1IPDiscovery.html#d2d28582fc8830ca107cc07aa9b79a5e" title="the socket for beacons in- and out-bound">socket_</a>; 
<a name="l00154"></a><a class="code" href="classdtn_1_1IPDiscovery.html#18f8ef2702f024cdc5a87cbc2e676b74">00154</a>     <span class="keywordtype">bool</span> <a class="code" href="classdtn_1_1IPDiscovery.html#18f8ef2702f024cdc5a87cbc2e676b74" title="whether to exit thread on send/recv failures">persist_</a>;           
<a name="l00155"></a>00155 };
<a name="l00156"></a>00156 
<a name="l00157"></a>00157 } <span class="comment">// namespace dtn</span>
<a name="l00158"></a>00158 
<a name="l00159"></a>00159 <span class="preprocessor">#endif </span><span class="comment">/* _IP_DISCOVERY_H_ */</span>
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