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

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<h1>UDPTunnel.cc</h1><a href="UDPTunnel_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 Intel Corporation</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 &lt;<a class="code" href="dtn-config_8h.html">dtn-config.h</a>&gt;</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 &lt;oasys/io/NetUtils.h&gt;</span>
<a name="l00022"></a>00022 
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="DTNTunnel_8h.html">DTNTunnel.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="UDPTunnel_8h.html">UDPTunnel.h</a>"</span>
<a name="l00025"></a>00025 
<a name="l00026"></a>00026 <span class="keyword">namespace </span>dtntunnel {
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00029"></a><a class="code" href="classdtntunnel_1_1UDPTunnel.html#2d9c8d8dff7f27abd1f9d004616d1811">00029</a> <a class="code" href="classdtntunnel_1_1UDPTunnel.html#2d9c8d8dff7f27abd1f9d004616d1811" title="Constructor.">UDPTunnel::UDPTunnel</a>()
<a name="l00030"></a>00030     : <a class="code" href="classdtntunnel_1_1IPTunnel.html" title="Pure virtual base class for tunneling of IP protocols.">IPTunnel</a>(<span class="stringliteral">"UDPTunnel"</span>, <span class="stringliteral">"/dtntunnel/udp"</span>),
<a name="l00031"></a>00031       sock_(<span class="stringliteral">"/dtntunnel/udp/sock"</span>)
<a name="l00032"></a>00032 {
<a name="l00033"></a>00033     <a class="code" href="classdtntunnel_1_1UDPTunnel.html#746c008c8cf5b5e051d9bf46fabb6339" title="Sender socket.">sock_</a>.init_socket();
<a name="l00034"></a>00034 }
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00037"></a>00037 <span class="keywordtype">void</span>
<a name="l00038"></a><a class="code" href="classdtntunnel_1_1UDPTunnel.html#7c0b986de60aefca660cc1dbe1b91e4c">00038</a> <a class="code" href="classdtntunnel_1_1UDPTunnel.html#7c0b986de60aefca660cc1dbe1b91e4c" title="Add a new listener.">UDPTunnel::add_listener</a>(in_addr_t listen_addr, u_int16_t listen_port,
<a name="l00039"></a>00039                         in_addr_t remote_addr, u_int16_t remote_port)
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041     <span class="comment">// the object will delete itself when the thread exits</span>
<a name="l00042"></a>00042     <span class="keyword">new</span> <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html" title="Helper class to handle a proxied UDP port.">Listener</a>(listen_addr, listen_port, remote_addr, remote_port);
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044     
<a name="l00045"></a>00045 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00046"></a>00046 <span class="keywordtype">void</span>
<a name="l00047"></a><a class="code" href="classdtntunnel_1_1UDPTunnel.html#358a6151f9569a28c3d0a38a4e76d131">00047</a> <a class="code" href="classdtntunnel_1_1UDPTunnel.html#358a6151f9569a28c3d0a38a4e76d131" title="Handle a newly arriving bundle.">UDPTunnel::handle_bundle</a>(<a class="code" href="structdtn_1_1APIBundle.html" title="Small encapsulating structure for API bundles.">dtn::APIBundle</a>* bundle)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049     <a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html" title="Struct to encapsulate the header sent with each tunneled bundle.">DTNTunnel::BundleHeader</a> hdr;
<a name="l00050"></a>00050     memcpy(&amp;hdr, bundle-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.buf(), <span class="keyword">sizeof</span>(hdr));
<a name="l00051"></a>00051     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a> = htons(hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a>);
<a name="l00052"></a>00052 
<a name="l00053"></a>00053     <span class="keywordtype">char</span>* bp = bundle-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.buf() + <span class="keyword">sizeof</span>(hdr);
<a name="l00054"></a>00054     <span class="keywordtype">int</span>  <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a> = bundle-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.len() - <span class="keyword">sizeof</span>(hdr);
<a name="l00055"></a>00055     
<a name="l00056"></a>00056     <span class="keywordtype">int</span> cc = <a class="code" href="classdtntunnel_1_1UDPTunnel.html#746c008c8cf5b5e051d9bf46fabb6339" title="Sender socket.">sock_</a>.sendto(bp, len,
<a name="l00057"></a>00057                            0, hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3b6e433ee570b7194ddcd8eae4ad81e4">remote_addr_</a>, hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a>);
<a name="l00058"></a>00058     <span class="keywordflow">if</span> (cc != len) {
<a name="l00059"></a>00059         log_err(<span class="stringliteral">"error sending packet to %s:%d: %s"</span>,
<a name="l00060"></a>00060                 intoa(hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3b6e433ee570b7194ddcd8eae4ad81e4">remote_addr_</a>), hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a>, strerror(<a class="code" href="IPDiscovery_8cc.html#d65a8842cc674e3ddf69355898c0ecbf">errno</a>));
<a name="l00061"></a>00061     } <span class="keywordflow">else</span> {
<a name="l00062"></a>00062         log_debug(<span class="stringliteral">"sent %zu byte packet to %s:%d"</span>,
<a name="l00063"></a>00063                   bundle-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.len() - <span class="keyword">sizeof</span>(hdr),
<a name="l00064"></a>00064                   intoa(hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3b6e433ee570b7194ddcd8eae4ad81e4">remote_addr_</a>), hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a>);
<a name="l00065"></a>00065     }
<a name="l00066"></a>00066 
<a name="l00067"></a>00067     <span class="keyword">delete</span> bundle;
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069 
<a name="l00070"></a>00070 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00071"></a><a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#d6020b13056ad90c6b849e03aabb475c">00071</a> <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#d6020b13056ad90c6b849e03aabb475c" title="Constructor.">UDPTunnel::Listener::Listener</a>(in_addr_t listen_addr, u_int16_t listen_port,
<a name="l00072"></a>00072                               in_addr_t remote_addr, u_int16_t remote_port)
<a name="l00073"></a>00073     : Thread(<span class="stringliteral">"UDPTunnel::Listener"</span>, DELETE_ON_EXIT),
<a name="l00074"></a>00074       <a class="code" href="classoasys_1_1Logger.html">Logger</a>(<span class="stringliteral">"UDPTunnel::Listener"</span>, <span class="stringliteral">"/dtntunnel/udp/listener"</span>), 
<a name="l00075"></a>00075       sock_(<span class="stringliteral">"/dtntunnel/udp/listener/sock"</span>),
<a name="l00076"></a>00076       listen_addr_(listen_addr),
<a name="l00077"></a>00077       listen_port_(listen_port),
<a name="l00078"></a>00078       remote_addr_(remote_addr),
<a name="l00079"></a>00079       remote_port_(remote_port)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081     start();
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 
<a name="l00084"></a>00084 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00085"></a>00085 <span class="keywordtype">void</span>
<a name="l00086"></a><a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#f8e525c937ede35798eac2112b63a6cb">00086</a> <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#f8e525c937ede35798eac2112b63a6cb" title="Main listen loop.">UDPTunnel::Listener::run</a>()
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088     <a class="code" href="classdtntunnel_1_1DTNTunnel.html" title="Main wrapper class for the DTN Tunnel.">DTNTunnel</a>* tunnel = DTNTunnel::instance();
<a name="l00089"></a>00089     <span class="keywordtype">int</span> ret = <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#de91482e505cf451f31d60f1c31a7cb5" title="Receiver socket.">sock_</a>.bind(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#7eacc21a554bf98a27746912ba1ddb49">listen_addr_</a>, <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#43305a008ec954523c51045a8f4794a9">listen_port_</a>);
<a name="l00090"></a>00090     <span class="keywordflow">if</span> (ret != 0) {
<a name="l00091"></a>00091         log_err(<span class="stringliteral">"can't bind to %s:%u"</span>, intoa(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#7eacc21a554bf98a27746912ba1ddb49">listen_addr_</a>), <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#43305a008ec954523c51045a8f4794a9">listen_port_</a>);
<a name="l00092"></a>00092         <span class="keywordflow">return</span>; <span class="comment">// die</span>
<a name="l00093"></a>00093     }
<a name="l00094"></a>00094 
<a name="l00095"></a>00095     <a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html" title="Struct to encapsulate the header sent with each tunneled bundle.">DTNTunnel::BundleHeader</a> hdr;
<a name="l00096"></a>00096     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#bdc835468bf4f3754733297e1b0c691f">protocol_</a>    = IPPROTO_UDP;
<a name="l00097"></a>00097     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#8b9631272077be1af3cd7806a90377b5">seqno_</a>       = 0;
<a name="l00098"></a>00098     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#938dc4313668520f8506dee0332a0f82">client_addr_</a> = <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#7eacc21a554bf98a27746912ba1ddb49">listen_addr_</a>;
<a name="l00099"></a>00099     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#da9fe3ea4d25b4c0e41ba528f472d5a3">client_port_</a> = htons(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#43305a008ec954523c51045a8f4794a9">listen_port_</a>);
<a name="l00100"></a>00100     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3b6e433ee570b7194ddcd8eae4ad81e4">remote_addr_</a> = <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#a685e585b69042bfedafa154886b4205">remote_addr_</a>;
<a name="l00101"></a>00101     hdr.<a class="code" href="structdtntunnel_1_1DTNTunnel_1_1BundleHeader.html#3ca6304059e164837dc1946096c91914">remote_port_</a> = htons(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#317af09608c1cf8497d62beab2ae05e2">remote_port_</a>);
<a name="l00102"></a>00102     
<a name="l00103"></a>00103     <span class="keywordflow">while</span> (1) {
<a name="l00104"></a>00104         <span class="keywordtype">int</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a> = <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#de91482e505cf451f31d60f1c31a7cb5" title="Receiver socket.">sock_</a>.recv(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#49edc3f1af4fa02298384ab2979170cc" title="Static receiving buffer.">recv_buf_</a>, <span class="keyword">sizeof</span>(<a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#49edc3f1af4fa02298384ab2979170cc" title="Static receiving buffer.">recv_buf_</a>), 0);
<a name="l00105"></a>00105         <span class="keywordflow">if</span> (len &lt;= 0) {
<a name="l00106"></a>00106             log_err(<span class="stringliteral">"error reading from socket: %s"</span>, strerror(<a class="code" href="IPDiscovery_8cc.html#d65a8842cc674e3ddf69355898c0ecbf">errno</a>));
<a name="l00107"></a>00107             <span class="keywordflow">return</span>; <span class="comment">// die</span>
<a name="l00108"></a>00108         }
<a name="l00109"></a>00109         
<a name="l00110"></a>00110         log_debug(<span class="stringliteral">"got %d byte packet"</span>, len);
<a name="l00111"></a>00111 
<a name="l00112"></a>00112         <a class="code" href="structdtn_1_1APIBundle.html" title="Small encapsulating structure for API bundles.">dtn::APIBundle</a>* b = <span class="keyword">new</span> <a class="code" href="structdtn_1_1APIBundle.html" title="Small encapsulating structure for API bundles.">dtn::APIBundle</a>();
<a name="l00113"></a>00113         <span class="keywordtype">char</span>* bp = b-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.buf(<span class="keyword">sizeof</span>(hdr) + len);
<a name="l00114"></a>00114         memcpy(bp, &amp;hdr, <span class="keyword">sizeof</span>(hdr));
<a name="l00115"></a>00115         memcpy(bp + <span class="keyword">sizeof</span>(hdr), <a class="code" href="classdtntunnel_1_1UDPTunnel_1_1Listener.html#49edc3f1af4fa02298384ab2979170cc" title="Static receiving buffer.">recv_buf_</a>, len);
<a name="l00116"></a>00116         b-&gt;<a class="code" href="structdtn_1_1APIBundle.html#3b18eab3d0b009956aa6eb3f5ee06478">payload_</a>.set_len(<span class="keyword">sizeof</span>(hdr) + len);
<a name="l00117"></a>00117         
<a name="l00118"></a>00118         <span class="keywordflow">if</span> (tunnel-&gt;<a class="code" href="classdtntunnel_1_1DTNTunnel.html#1b60c68235406847c8bdcacabb834e2a" title="Hook for various tunnel classes to send a bundle.">send_bundle</a>(b, tunnel-&gt;<a class="code" href="classdtntunnel_1_1DTNTunnel.html#8903d6126936ce6a840c1d69c51a2100">dest_eid</a>()) != <a class="code" href="dtn__errno_8h.html#3723251cb5d056b6ace3e22561da1e11" title="DTN API error codes.">DTN_SUCCESS</a>)
<a name="l00119"></a>00119             exit(1);
<a name="l00120"></a>00120     }
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 
<a name="l00123"></a>00123 } <span class="comment">// namespace dtntunnel</span>
</pre></div></div>
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