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<h1>PreviousHopBlockProcessor.cc</h1><a href="PreviousHopBlockProcessor_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="PreviousHopBlockProcessor_8h.html">PreviousHopBlockProcessor.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_1PreviousHopBlockProcessor.html#6e779a1aeb939f43d016965ce685d839">00030</a> <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#6e779a1aeb939f43d016965ce685d839" title="Constructor.">PreviousHopBlockProcessor::PreviousHopBlockProcessor</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>::PREVIOUS_HOP_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_1PreviousHopBlockProcessor.html#cad5cdc3eb71ae43f9c0dfbea80383bb">00037</a> <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#cad5cdc3eb71ae43f9c0dfbea80383bb" title="Virtual from BlockProcessor.">PreviousHopBlockProcessor::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>& link,
<a name="l00041"></a>00041 <a class="code" href="classdtn_1_1BlockInfo.html#3d0bc8cd207912ac5406fde3fc2c8d1c" title="List owner indicator (not transmitted).">list_owner_t</a> list)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keywordflow">if</span> (link == NULL || !link->params().prevhop_hdr_) {
<a name="l00044"></a>00044 <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#cce9a45a37bad1da41648533b0e15457">BP_FAIL</a>;
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordflow">return</span> <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#cad5cdc3eb71ae43f9c0dfbea80383bb" title="Virtual from BlockProcessor.">BlockProcessor::prepare</a>(bundle, xmit_blocks, source, link, list);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00051"></a>00051 <span class="keywordtype">int</span>
<a name="l00052"></a><a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#b22318bae2a6c191334c3ddf9837aee2">00052</a> <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#b22318bae2a6c191334c3ddf9837aee2" title="Virtual from BlockProcessor.">PreviousHopBlockProcessor::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="l00053"></a>00053 <a class="code" href="classdtn_1_1BlockInfoVec.html" title="Class for a vector of BlockInfo structures.">BlockInfoVec</a>* xmit_blocks,
<a name="l00054"></a>00054 <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="l00055"></a>00055 <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="l00056"></a>00056 <span class="keywordtype">bool</span> last)
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 (void)bundle;
<a name="l00059"></a>00059 (void)link;
<a name="l00060"></a>00060 (void)xmit_blocks;
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">// XXX/demmer this is not the right protocol spec'd format since</span>
<a name="l00063"></a>00063 <span class="comment">// it's supposed to use the dictionary</span>
<a name="l00064"></a>00064
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">// if the flag isn't set, we shouldn't have a block</span>
<a name="l00067"></a>00067 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link->params().prevhop_hdr_);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <a class="code" href="classdtn_1_1BundleDaemon.html" title="Class that handles the basic event / action mechanism.">BundleDaemon</a>* bd = BundleDaemon::instance();
<a name="l00070"></a>00070 <span class="keywordtype">size_t</span> length = bd->local_eid().length();
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <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="l00073"></a>00073 block,
<a name="l00074"></a>00074 <a class="code" href="classdtn_1_1BundleProtocol.html#54a44c247b3c20b4ed11e29494284ca756496904248edc05c52fd4822663d46b">BundleProtocol::PREVIOUS_HOP_BLOCK</a>,
<a name="l00075"></a>00075 <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b0b657a90e3033d112835cf7df7a4855b">BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR</a> |
<a name="l00076"></a>00076 (last ? <a class="code" href="classdtn_1_1BundleProtocol.html#cd56fabd4393bd86ffc295bafaba540b60a3533536c98ae651d4533edd238037">BundleProtocol::BLOCK_FLAG_LAST_BLOCK</a> : 0),
<a name="l00077"></a>00077 length);
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <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="l00080"></a>00080 contents->reserve(block-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>() + length);
<a name="l00081"></a>00081 contents->set_len(block-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>() + length);
<a name="l00082"></a>00082 memcpy(contents->buf() + block-><a class="code" href="classdtn_1_1BlockInfo.html#590c483ae6cc403c5062b8b3acc51ae3" title="Accessors.">data_offset</a>(),
<a name="l00083"></a>00083 bd->local_eid().data(), length);
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordflow">return</span> <a class="code" href="BlockProcessor_8h.html#446572d61c813971cb4d5ce4ee1b9c0b">BP_SUCCESS</a>;
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00089"></a>00089 <span class="keywordtype">int</span>
<a name="l00090"></a><a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#26519a10c6876ead92bdd5e5a0fc745b">00090</a> <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#26519a10c6876ead92bdd5e5a0fc745b" title="Virtual from BlockProcessor.">PreviousHopBlockProcessor::consume</a>(<a class="code" href="classdtn_1_1Bundle.html" title="The internal representation of a bundle.">Bundle</a>* bundle,
<a name="l00091"></a>00091 <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="l00092"></a>00092 u_char* <a class="code" href="num2sdnv_8c.html#a81cdcc7ff6987bc85c073253e32715f">buf</a>,
<a name="l00093"></a>00093 <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordtype">int</span> cc = <a class="code" href="classdtn_1_1PreviousHopBlockProcessor.html#26519a10c6876ead92bdd5e5a0fc745b" title="Virtual from BlockProcessor.">BlockProcessor::consume</a>(bundle, block, buf, len);
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (cc == -1) {
<a name="l00098"></a>00098 <span class="keywordflow">return</span> -1; <span class="comment">// protocol error</span>
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordflow">if</span> (! block-><a class="code" href="classdtn_1_1BlockInfo.html#a70c73cf28ec51a265dc5ac077c56975" title="Accessors.">complete</a>()) {
<a name="l00102"></a>00102 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(cc == (<span class="keywordtype">int</span>)len);
<a name="l00103"></a>00103 <span class="keywordflow">return</span> cc;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (! bundle-><a class="code" href="classdtn_1_1Bundle.html#dc7d3639afc306668bd1d649c398b5d5" title="Setters and mutable accessors.">mutable_prevhop</a>()->
<a name="l00107"></a>00107 assign((<span class="keywordtype">char</span>*)block-><a class="code" href="classdtn_1_1BlockInfo.html#0a211825b5545e2e3068766633502c07" title="Accessors.">data</a>(), block-><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="SDNV_8cc.html#3f24cadc9f28aba33472df0500092dcb">log_err_p</a>(<span class="stringliteral">"/dtn/bundle/protocol"</span>,
<a name="l00110"></a>00110 <span class="stringliteral">"error parsing previous hop eid '%.*s"</span>,
<a name="l00111"></a>00111 block-><a class="code" href="classdtn_1_1BlockInfo.html#cb7676dfe53630699317388ad32e8d99" title="Accessors.">data_length</a>(), block-><a class="code" href="classdtn_1_1BlockInfo.html#0a211825b5545e2e3068766633502c07" title="Accessors.">data</a>());
<a name="l00112"></a>00112 <span class="keywordflow">return</span> -1;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keywordflow">return</span> cc;
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118
<a name="l00119"></a>00119 } <span class="comment">// namespace dtn</span>
</pre></div></div>
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