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

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<h1>SessionBlockProcessor.cc</h1><a href="SessionBlockProcessor_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 2007 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 "<a class="code" href="SessionBlockProcessor_8h.html">SessionBlockProcessor.h</a>"</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="bundling_2Bundle_8h.html">Bundle.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="BundleDaemon_8h.html">BundleDaemon.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="BundleProtocol_8h.html">BundleProtocol.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="contacts_2Link_8h.html">contacts/Link.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="l00029"></a>00029 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00030"></a><a class="code" href="classdtn_1_1SessionBlockProcessor.html#6250676d18d6c60aabe6a18582f44810">00030</a> <a class="code" href="classdtn_1_1SessionBlockProcessor.html#6250676d18d6c60aabe6a18582f44810" title="Constructor.">SessionBlockProcessor::SessionBlockProcessor</a>()
<a name="l00031"></a>00031     : <a class="code" href="classdtn_1_1BlockProcessor.html" title="Base class for the protocol handling of bundle blocks, including the core primary...">BlockProcessor</a>(<a class="code" href="classdtn_1_1BundleProtocol.html" title="Centralized class used to convert a Bundle to / from the bundle protocol specification...">BundleProtocol</a>::SESSION_BLOCK)
<a name="l00032"></a>00032 {
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00036"></a>00036 <span class="keywordtype">int</span>
<a name="l00037"></a><a class="code" href="classdtn_1_1SessionBlockProcessor.html#11e5c11d9bf92e47f70b9a4798b82b01">00037</a> <a class="code" href="classdtn_1_1SessionBlockProcessor.html#11e5c11d9bf92e47f70b9a4798b82b01" title="Virtual from BlockProcessor.">SessionBlockProcessor::prepare</a>(<span class="keyword">const</span> <a class="code" href="classdtn_1_1Bundle.html" title="The internal representation of a bundle.">Bundle</a>*           bundle,
<a name="l00038"></a>00038                                <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>*           xmit_blocks,
<a name="l00039"></a>00039                                <span class="keyword">const</span> <a class="code" href="classdtn_1_1BlockInfo.html" title="Class used to store unparsed bundle blocks and associated metadata about them.">BlockInfo</a>*        source,
<a name="l00040"></a>00040                                <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>&amp;          link,
<a name="l00041"></a>00041                                <a class="code" href="classdtn_1_1BlockInfo.html#3d0bc8cd207912ac5406fde3fc2c8d1c" title="List owner indicator (not transmitted).">BlockInfo::list_owner_t</a> list)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043     <span class="keywordflow">if</span> (bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#9bdc5df0500ec9859132c917f48f7bb0" title="Accessors.">session_eid</a>().<a class="code" href="classdtn_1_1EndpointID.html#3ed7639ed8794ea8045bb5d16128c5f5">length</a>() == 0) {
<a name="l00044"></a>00044         <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#446572d61c813971cb4d5ce4ee1b9c0b">BP_SUCCESS</a>;
<a name="l00045"></a>00045     }
<a name="l00046"></a>00046     
<a name="l00047"></a>00047     <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#9bdc5df0500ec9859132c917f48f7bb0" title="Accessors.">session_eid</a>() != <a class="code" href="classdtn_1_1EndpointID.html#31bd1844cae5e71cc2393a139c9bec4c" title="Return the special endpoint id used for the null endpoint, namely &amp;quot;dtn:none&amp;quot;...">EndpointID::NULL_EID</a>());
<a name="l00048"></a>00048     <a class="code" href="classdtn_1_1SessionBlockProcessor.html#11e5c11d9bf92e47f70b9a4798b82b01" title="Virtual from BlockProcessor.">BlockProcessor::prepare</a>(bundle, xmit_blocks, source, link, list);
<a name="l00049"></a>00049     <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#446572d61c813971cb4d5ce4ee1b9c0b">BP_SUCCESS</a>;
<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="keywordtype">int</span>
<a name="l00054"></a><a class="code" href="classdtn_1_1SessionBlockProcessor.html#7c1a00550f5109a7dd09a6f018bed4eb">00054</a> <a class="code" href="classdtn_1_1SessionBlockProcessor.html#7c1a00550f5109a7dd09a6f018bed4eb" title="Virtual from BlockProcessor.">SessionBlockProcessor::generate</a>(<span class="keyword">const</span> <a class="code" href="classdtn_1_1Bundle.html" title="The internal representation of a bundle.">Bundle</a>*  bundle,
<a name="l00055"></a>00055                                 <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>*  xmit_blocks,
<a name="l00056"></a>00056                                 <a class="code" href="classdtn_1_1BlockInfo.html" title="Class used to store unparsed bundle blocks and associated metadata about them.">BlockInfo</a>*     block,
<a name="l00057"></a>00057                                 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>&amp; link,
<a name="l00058"></a>00058                                 <span class="keywordtype">bool</span>           last)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060     (void)link;
<a name="l00061"></a>00061 
<a name="l00062"></a>00062     <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#9bdc5df0500ec9859132c917f48f7bb0" title="Accessors.">session_eid</a>().<a class="code" href="classdtn_1_1EndpointID.html#3ed7639ed8794ea8045bb5d16128c5f5">length</a>() != 0);
<a name="l00063"></a>00063 
<a name="l00064"></a>00064     <span class="comment">// add the eid to the dictionary</span>
<a name="l00065"></a>00065     block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#02abf3898eea4390447bd24aa8c7f35a" title="Mutating accessors.">add_eid</a>(bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#9bdc5df0500ec9859132c917f48f7bb0" title="Accessors.">session_eid</a>());
<a name="l00066"></a>00066 
<a name="l00067"></a>00067     <span class="keywordtype">size_t</span> length = 1;
<a name="l00068"></a>00068     <a class="code" href="classdtn_1_1BlockProcessor.html#c08f7b82f6049f30710a5dcdebb61ce7" title="Generate the standard preamble for the given block type, flags, EID-list and content...">generate_preamble</a>(xmit_blocks, 
<a name="l00069"></a>00069                       block,
<a name="l00070"></a>00070                       <a class="code" href="classdtn_1_1BundleProtocol.html#54a44c247b3c20b4ed11e29494284ca77663bb00a2f3b1e33c5e501bf2c8c9a8" title="NOT IN SPEC YET.">BundleProtocol::SESSION_BLOCK</a>,
<a name="l00071"></a>00071                       <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b0b657a90e3033d112835cf7df7a4855b">BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR</a> |
<a name="l00072"></a>00072                       <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b08e26de152eecfd35ff1081abf480309">BundleProtocol::BLOCK_FLAG_REPORT_ONERROR</a> |
<a name="l00073"></a>00073                       (last ? <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b60a3533536c98ae651d4533edd238037">BundleProtocol::BLOCK_FLAG_LAST_BLOCK</a> : 0),
<a name="l00074"></a>00074                       length);
<a name="l00075"></a>00075 
<a name="l00076"></a>00076     <a class="code" href="classdtn_1_1BlockInfo.html#369e8412fcff682247168dbc4776ded2" title="To store the formatted block data, we use a scratch buffer with 64 bytes of static...">BlockInfo::DataBuffer</a>* contents = block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#2b1a3f8f9c10d722bc4313781aac8e19" title="Mutating accessors.">writable_contents</a>();
<a name="l00077"></a>00077     contents-&gt;reserve(block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>() + length);
<a name="l00078"></a>00078     contents-&gt;set_len(block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>() + length);
<a name="l00079"></a>00079     u_int8_t* bp = contents-&gt;buf() + block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>();
<a name="l00080"></a>00080     *bp = bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#973ca2bfa07da25650c14c0b536b0665" title="Accessors.">session_flags</a>();
<a name="l00081"></a>00081 
<a name="l00082"></a>00082     <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#446572d61c813971cb4d5ce4ee1b9c0b">BP_SUCCESS</a>;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084 
<a name="l00085"></a>00085 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00086"></a>00086 <span class="keywordtype">int</span>
<a name="l00087"></a><a class="code" href="classdtn_1_1SessionBlockProcessor.html#5a0b9377c4f3339154f92ed9bc27e4c7">00087</a> <a class="code" href="classdtn_1_1SessionBlockProcessor.html#5a0b9377c4f3339154f92ed9bc27e4c7" title="Virtual from BlockProcessor.">SessionBlockProcessor::consume</a>(<a class="code" href="classdtn_1_1Bundle.html" title="The internal representation of a bundle.">Bundle</a>* bundle, <a class="code" href="classdtn_1_1BlockInfo.html" title="Class used to store unparsed bundle blocks and associated metadata about them.">BlockInfo</a>* block,
<a name="l00088"></a>00088                                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="l00089"></a>00089 {
<a name="l00090"></a>00090     <span class="keywordtype">int</span> cc = <a class="code" href="classdtn_1_1SessionBlockProcessor.html#5a0b9377c4f3339154f92ed9bc27e4c7" title="Virtual from BlockProcessor.">BlockProcessor::consume</a>(bundle, block, buf, len);
<a name="l00091"></a>00091 
<a name="l00092"></a>00092     <span class="keywordflow">if</span> (cc == -1) {
<a name="l00093"></a>00093         <span class="keywordflow">return</span> -1; <span class="comment">// protocol error</span>
<a name="l00094"></a>00094     }
<a name="l00095"></a>00095     
<a name="l00096"></a>00096     <span class="keywordflow">if</span> (! block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#a70c73cf28ec51a265dc5ac077c56975" title="Accessors.">complete</a>()) {
<a name="l00097"></a>00097         <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(cc == (<span class="keywordtype">int</span>)len);
<a name="l00098"></a>00098         <span class="keywordflow">return</span> cc;
<a name="l00099"></a>00099     }
<a name="l00100"></a>00100 
<a name="l00101"></a>00101     <span class="keywordflow">if</span> (block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#b20777efd3367156feb424643fc089e4" title="Accessors.">eid_list</a>().size() != 1) {
<a name="l00102"></a>00102         <a class="code" href="SDNV_8cc.html#3f24cadc9f28aba33472df0500092dcb">log_err_p</a>(<span class="stringliteral">"/dtn/bundle/protocol"</span>,
<a name="l00103"></a>00103                   <span class="stringliteral">"error parsing session block -- %zu eids in list"</span>,
<a name="l00104"></a>00104                   block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#b20777efd3367156feb424643fc089e4" title="Accessors.">eid_list</a>().size());
<a name="l00105"></a>00105         <span class="keywordflow">return</span> -1;
<a name="l00106"></a>00106     }
<a name="l00107"></a>00107 
<a name="l00108"></a>00108     bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#453f60de16237ff944b5b95951288611" title="Setters and mutable accessors.">mutable_session_eid</a>()-&gt;<a class="code" href="classdtn_1_1EndpointID.html#ec39752e4da3107b16ff5da58d2aa5ab" title="Assign this endpoint ID as a copy of the other.">assign</a>(block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#b20777efd3367156feb424643fc089e4" title="Accessors.">eid_list</a>()[0]);
<a name="l00109"></a>00109     bundle-&gt;<a class="code" href="classdtn_1_1Bundle.html#24e65f2c2ad09ce8bca3409f450df21c" title="Setters and mutable accessors.">set_session_flags</a>(*block-&gt;<a class="code" href="classdtn_1_1BlockInfo.html#0a211825b5545e2e3068766633502c07" title="Accessors.">data</a>());
<a name="l00110"></a>00110 
<a name="l00111"></a>00111     <span class="keywordflow">return</span> cc;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 
<a name="l00114"></a>00114 
<a name="l00115"></a>00115 } <span class="comment">// namespace dtn</span>
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