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<h1>UnknownBlockProcessor.cc</h1><a href="UnknownBlockProcessor_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 <<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 "<a class="code" href="UnknownBlockProcessor_8h.html">UnknownBlockProcessor.h</a>"</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="BlockInfo_8h.html">BlockInfo.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="bundling_2Bundle_8h.html">Bundle.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="keyword">template</span> <> UnknownBlockProcessor*
<a name="l00030"></a>00030 oasys::Singleton<UnknownBlockProcessor>::instance_ = NULL;
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00033"></a><a class="code" href="classdtn_1_1UnknownBlockProcessor.html#c3fe5c954c3d5b42aab73092ecde3d9c">00033</a> <a class="code" href="classdtn_1_1UnknownBlockProcessor.html#c3fe5c954c3d5b42aab73092ecde3d9c" title="Constructor.">UnknownBlockProcessor::UnknownBlockProcessor</a>()
<a name="l00034"></a>00034 : <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>::UNKNOWN_BLOCK)
<a name="l00035"></a>00035 <span class="comment">// typecode is ignored for this processor</span>
<a name="l00036"></a>00036 <span class="comment">// pl -- this raises the interesting situation where</span>
<a name="l00037"></a>00037 <span class="comment">// source->type() returns the actual type, and</span>
<a name="l00038"></a>00038 <span class="comment">// source->owner_->block_type() will return UNKNOWN_BLOCK</span>
<a name="l00039"></a>00039 {
<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="keywordtype">int</span>
<a name="l00044"></a><a class="code" href="classdtn_1_1UnknownBlockProcessor.html#1c7169065341410fe4c23c6b6d48dccb">00044</a> UnknownBlockProcessor::prepare(<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="l00045"></a>00045 <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>* xmit_blocks,
<a name="l00046"></a>00046 <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="l00047"></a>00047 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link,
<a name="l00048"></a>00048 <a class="code" href="classdtn_1_1BlockInfo.html#3d0bc8cd207912ac5406fde3fc2c8d1c" title="List owner indicator (not transmitted).">list_owner_t</a> list)
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source != NULL);
<a name="l00051"></a>00051 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source-><a class="code" href="classdtn_1_1BlockInfo.html#bc48fc2f7f543561e26a8a9e32aceda2" title="Accessors.">owner</a>() == <span class="keyword">this</span>);
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keywordflow">if</span> (source-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>() & <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b92bb8f5c147c6963041f7bc20cfe6e29">BundleProtocol::BLOCK_FLAG_DISCARD_BLOCK_ONERROR</a>) {
<a name="l00054"></a>00054 <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#cce9a45a37bad1da41648533b0e15457">BP_FAIL</a>;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="comment">// If we're called for this type then security is not enabled</span>
<a name="l00058"></a>00058 <span class="comment">// and we should NEVER forward BAB</span>
<a name="l00059"></a>00059 <span class="keywordflow">if</span> (source-><a class="code" href="classdtn_1_1BlockInfo.html#46e4157d30528eae60a1cd240e58b495">type</a>() == <a class="code" href="classdtn_1_1BundleProtocol.html#54a44c247b3c20b4ed11e29494284ca73f1cdc11347b58f22299129612a2d5e9">BundleProtocol::BUNDLE_AUTHENTICATION_BLOCK</a>) {
<a name="l00060"></a>00060 <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#cce9a45a37bad1da41648533b0e15457">BP_FAIL</a>;
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">return</span> <a class="code" href="classdtn_1_1BlockProcessor.html#f7c21ecdcbbb4f2060c7f5f865415c48" title="First callback to generate blocks for the output pass.">BlockProcessor::prepare</a>(bundle, xmit_blocks, source, link, list);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00067"></a>00067 <span class="keywordtype">int</span>
<a name="l00068"></a><a class="code" href="classdtn_1_1UnknownBlockProcessor.html#d79d87faec3e2573635ff08f1185dea6">00068</a> <a class="code" href="classdtn_1_1UnknownBlockProcessor.html#d79d87faec3e2573635ff08f1185dea6" title="Virtual from BlockProcessor.">UnknownBlockProcessor::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="l00069"></a>00069 <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>* xmit_blocks,
<a name="l00070"></a>00070 <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="l00071"></a>00071 <span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link,
<a name="l00072"></a>00072 <span class="keywordtype">bool</span> last)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 (void)bundle;
<a name="l00075"></a>00075 (void)link;
<a name="l00076"></a>00076 (void)xmit_blocks;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="comment">// This can only be called if there was a corresponding block in</span>
<a name="l00079"></a>00079 <span class="comment">// the input path</span>
<a name="l00080"></a>00080 <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 = block-><a class="code" href="classdtn_1_1BlockInfo.html#f11df0a802e40fd503e49ee6580f585d" title="Accessors.">source</a>();
<a name="l00081"></a>00081 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source != NULL);
<a name="l00082"></a>00082 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source-><a class="code" href="classdtn_1_1BlockInfo.html#bc48fc2f7f543561e26a8a9e32aceda2" title="Accessors.">owner</a>() == <span class="keyword">this</span>);
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="comment">// We shouldn't be here if the block has the following flags set</span>
<a name="l00085"></a>00085 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>((source-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>() &
<a name="l00086"></a>00086 <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b0b657a90e3033d112835cf7df7a4855b">BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR</a>) == 0);
<a name="l00087"></a>00087 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>((source-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>() &
<a name="l00088"></a>00088 <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b92bb8f5c147c6963041f7bc20cfe6e29">BundleProtocol::BLOCK_FLAG_DISCARD_BLOCK_ONERROR</a>) == 0);
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">// The source better have some contents, but doesn't need to have</span>
<a name="l00091"></a>00091 <span class="comment">// any data necessarily</span>
<a name="l00092"></a>00092 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source-><a class="code" href="classdtn_1_1BlockInfo.html#40fee1299938523234d3ae8c80661e22" title="Accessors.">contents</a>().len() != 0);
<a name="l00093"></a>00093 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(source-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>() != 0);
<a name="l00094"></a>00094
<a name="l00095"></a>00095 u_int8_t flags = source-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>();
<a name="l00096"></a>00096 <span class="keywordflow">if</span> (last) {
<a name="l00097"></a>00097 flags |= <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b60a3533536c98ae651d4533edd238037">BundleProtocol::BLOCK_FLAG_LAST_BLOCK</a>;
<a name="l00098"></a>00098 } <span class="keywordflow">else</span> {
<a name="l00099"></a>00099 flags &= ~<a class="code" href="classdtn_1_1BundleProtocol.html" title="Centralized class used to convert a Bundle to / from the bundle protocol specification...">BundleProtocol</a>::BLOCK_FLAG_LAST_BLOCK;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 flags |= <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b780f32e1722378470bd143d2fed9cd29">BundleProtocol::BLOCK_FLAG_FORWARDED_UNPROCESSED</a>;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 block-><a class="code" href="classdtn_1_1BlockInfo.html#371f09d4cb7cbd6c6cd60a7823f1630a" title="Mutating accessors.">set_eid_list</a>(source-><a class="code" href="classdtn_1_1BlockInfo.html#b20777efd3367156feb424643fc089e4" title="Accessors.">eid_list</a>());
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <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, block, source-><a class="code" href="classdtn_1_1BlockInfo.html#46e4157d30528eae60a1cd240e58b495">type</a>(), flags,
<a name="l00106"></a>00106 source-><a class="code" href="classdtn_1_1BlockInfo.html#cb7676dfe53630699317388ad32e8d99" title="Accessors.">data_length</a>());
<a name="l00107"></a>00107 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(block-><a class="code" href="classdtn_1_1BlockInfo.html#cb7676dfe53630699317388ad32e8d99" title="Accessors.">data_length</a>() == source-><a class="code" href="classdtn_1_1BlockInfo.html#cb7676dfe53630699317388ad32e8d99" title="Accessors.">data_length</a>());
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <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-><a class="code" href="classdtn_1_1BlockInfo.html#2b1a3f8f9c10d722bc4313781aac8e19" title="Mutating accessors.">writable_contents</a>();
<a name="l00110"></a>00110 contents->reserve(block-><a class="code" href="classdtn_1_1BlockInfo.html#2045184fe07026a47e1226bf7142f89a" title="Accessors.">full_length</a>());
<a name="l00111"></a>00111 memcpy(contents->buf() + block-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>(),
<a name="l00112"></a>00112 source-><a class="code" href="classdtn_1_1BlockInfo.html#40fee1299938523234d3ae8c80661e22" title="Accessors.">contents</a>().buf() + source-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>(),
<a name="l00113"></a>00113 block-><a class="code" href="classdtn_1_1BlockInfo.html#cb7676dfe53630699317388ad32e8d99" title="Accessors.">data_length</a>());
<a name="l00114"></a>00114 contents->set_len(block-><a class="code" href="classdtn_1_1BlockInfo.html#2045184fe07026a47e1226bf7142f89a" title="Accessors.">full_length</a>());
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#446572d61c813971cb4d5ce4ee1b9c0b">BP_SUCCESS</a>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00120"></a>00120 <span class="keywordtype">bool</span>
<a name="l00121"></a><a class="code" href="classdtn_1_1UnknownBlockProcessor.html#446c8a648957e850d53dd1e78f5e4ea0">00121</a> <a class="code" href="classdtn_1_1UnknownBlockProcessor.html#446c8a648957e850d53dd1e78f5e4ea0" title="Virtual from BlockProcessor.">UnknownBlockProcessor::validate</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="l00122"></a>00122 <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>* block_list,
<a name="l00123"></a>00123 <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="l00124"></a>00124 <a class="code" href="classdtn_1_1BundleProtocol.html#37b000d94172c06970bb8af32889f917" title="Bundle Status Report &quot;Reason Code&quot; flags.">status_report_reason_t</a>* reception_reason,
<a name="l00125"></a>00125 <a class="code" href="classdtn_1_1BundleProtocol.html#37b000d94172c06970bb8af32889f917" title="Bundle Status Report &quot;Reason Code&quot; flags.">status_report_reason_t</a>* deletion_reason)
<a name="l00126"></a>00126 {
<a name="l00127"></a>00127 <span class="comment">// check for generic block errors</span>
<a name="l00128"></a>00128 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1BlockProcessor.html#14242dcdb094a179f718a5eaee23cabd" title="Validate the block.">BlockProcessor::validate</a>(bundle, block_list, block,
<a name="l00129"></a>00129 reception_reason, deletion_reason)) {
<a name="l00130"></a>00130 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="comment">// extension blocks of unknown type are considered to be "invalid"</span>
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (block-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>() & <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b08e26de152eecfd35ff1081abf480309">BundleProtocol::BLOCK_FLAG_REPORT_ONERROR</a>) {
<a name="l00135"></a>00135 *reception_reason = <a class="code" href="classdtn_1_1BundleProtocol.html#37b000d94172c06970bb8af32889f917a86c9900fe5641754acdcdb326b79b2c">BundleProtocol::REASON_BLOCK_UNINTELLIGIBLE</a>;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">if</span> (block-><a class="code" href="classdtn_1_1BlockInfo.html#51f21d5cf4aef2550b605ab90961e045">flags</a>() & <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b0b657a90e3033d112835cf7df7a4855b">BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR</a>) {
<a name="l00139"></a>00139 *deletion_reason = <a class="code" href="classdtn_1_1BundleProtocol.html#37b000d94172c06970bb8af32889f917a86c9900fe5641754acdcdb326b79b2c">BundleProtocol::REASON_BLOCK_UNINTELLIGIBLE</a>;
<a name="l00140"></a>00140 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146 } <span class="comment">// namespace dtn</span>
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