<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>DTN Reference Implementation: RIBDTLV.cc Source File</title> <link href="doxygen.css" rel="stylesheet" type="text/css"> <link href="tabs.css" rel="stylesheet" type="text/css"> </head><body> <!-- Generated by Doxygen 1.5.6 --> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="main.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <h1>RIBDTLV.cc</h1><a href="RIBDTLV_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 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">#include <arpa/inet.h></span> <span class="comment">// for hton[ls] and ntoh[ls]</span> <a name="l00018"></a>00018 <span class="preprocessor">#include "<a class="code" href="Util_8h.html">Util.h</a>"</span> <a name="l00019"></a>00019 <span class="preprocessor">#include "<a class="code" href="RIBDTLV_8h.html">RIBDTLV.h</a>"</span> <a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="keyword">namespace </span>prophet <a name="l00022"></a>00022 { <a name="l00023"></a>00023 <a name="l00024"></a><a class="code" href="classprophet_1_1RIBDTLV.html#e25bbe32fd51babaeea0dcb6dde4155c">00024</a> <a class="code" href="classprophet_1_1RIBDTLV.html#21d749e043b5c6ee6787418475ccd740" title="Constructor.">RIBDTLV::RIBDTLV</a>(<span class="keyword">const</span> <a class="code" href="classprophet_1_1Dictionary.html" title="Utility class to facilitate converting to and from routing string (endpoint ID) and...">Dictionary</a>& ribd) <a name="l00025"></a>00025 : <a class="code" href="classprophet_1_1BaseTLV.html" title="The Prophet I-D (March 2006) dictates five bytecodes for router state exchange messages...">BaseTLV</a>(<a class="code" href="classprophet_1_1BaseTLV.html" title="The Prophet I-D (March 2006) dictates five bytecodes for router state exchange messages...">BaseTLV</a>::RIBD_TLV), ribd_(ribd) <a name="l00026"></a>00026 { <a name="l00027"></a>00027 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> = <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00028"></a>00028 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> += <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#250334386542b62223dc658ecceacf66" title="Helper function for serializing, where RASsz is the sizeof(RoutingAddressString)...">guess_ribd_size</a>(<a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a>); <a name="l00029"></a>00029 } <a name="l00030"></a>00030 <a name="l00031"></a><a class="code" href="classprophet_1_1RIBDTLV.html#21d749e043b5c6ee6787418475ccd740">00031</a> RIBDTLV::RIBDTLV() <a name="l00032"></a>00032 : <a class="code" href="classprophet_1_1BaseTLV.html" title="The Prophet I-D (March 2006) dictates five bytecodes for router state exchange messages...">BaseTLV</a>(<a class="code" href="classprophet_1_1BaseTLV.html" title="The Prophet I-D (March 2006) dictates five bytecodes for router state exchange messages...">BaseTLV</a>::RIBD_TLV) {} <a name="l00033"></a>00033 <a name="l00034"></a>00034 <span class="keywordtype">size_t</span> <a name="l00035"></a><a class="code" href="classprophet_1_1RIBDTLV.html#cb9d5d3a603d208a7c4d880e4b8cb7a7">00035</a> <a class="code" href="classprophet_1_1RIBDTLV.html#cb9d5d3a603d208a7c4d880e4b8cb7a7" title="Serialize destination ID out to buffer bp, size len, using struct RoutingAddressString;...">RIBDTLV::write_ras_entry</a>(u_int16_t sid, <a name="l00036"></a>00036 <span class="keyword">const</span> std::string& dest_id, <a name="l00037"></a>00037 u_char* bp, <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>)<span class="keyword"> const</span> <a name="l00038"></a>00038 <span class="keyword"></span>{ <a name="l00039"></a>00039 <span class="comment">// weed out the oddball</span> <a name="l00040"></a>00040 <span class="keywordflow">if</span> (bp == NULL) <span class="keywordflow">return</span> 0; <a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="comment">// align length of dest_id to 4 byte boundary</span> <a name="l00043"></a>00043 <span class="keywordtype">size_t</span> copylen = <a class="code" href="Announce_8h.html#10fb10f052238243f08749f41a8374a6">FOUR_BYTE_ALIGN</a>(dest_id.length()); <a name="l00044"></a>00044 <a name="l00045"></a>00045 <span class="comment">// make sure the lengths match up with the provided buffer</span> <a name="l00046"></a>00046 <span class="keywordflow">if</span> (<a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a> + copylen > len) <span class="keywordflow">return</span> 0; <a name="l00047"></a>00047 <a name="l00048"></a>00048 <span class="comment">// initialize to sizeof overhead</span> <a name="l00049"></a>00049 <span class="keywordtype">size_t</span> retval = <a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a>; <a name="l00050"></a>00050 <a name="l00051"></a>00051 <span class="comment">// start writing out to buffer</span> <a name="l00052"></a>00052 <a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html" title="Routing Address String (entry in RIBD above) p.">RoutingAddressString</a>* ras = (<a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html" title="Routing Address String (entry in RIBD above) p.">RoutingAddressString</a>*) bp; <a name="l00053"></a>00053 ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#4867d857340fbdc4b5004dfc2a3df51f" title="16 bit identifier that is constant for the duration of a session.">string_id</a> = htons(sid); <a name="l00054"></a>00054 ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#704a55c844d9090887addcb7f885bf94" title="Length of Address String.">length</a> = dest_id.length() & 0xff; <a name="l00055"></a>00055 memcpy(&ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#ab006316583f2ae6310af91023fce749">ra_string</a>[0],dest_id.c_str(),dest_id.length()); <a name="l00056"></a>00056 retval += copylen; <span class="comment">// 32-bit alignment</span> <a name="l00057"></a>00057 <a name="l00058"></a>00058 <span class="comment">// zero out slack, if any</span> <a name="l00059"></a>00059 <span class="keywordflow">while</span> (copylen-- > ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#704a55c844d9090887addcb7f885bf94" title="Length of Address String.">length</a>) <a name="l00060"></a>00060 ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#ab006316583f2ae6310af91023fce749">ra_string</a>[copylen] = <span class="charliteral">'\0'</span>; <a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="keywordflow">return</span> retval; <a name="l00063"></a>00063 } <a name="l00064"></a>00064 <a name="l00065"></a>00065 <span class="keywordtype">size_t</span> <a name="l00066"></a><a class="code" href="classprophet_1_1RIBDTLV.html#9b26b15fa1b5286d40b7eba91a8d39e6">00066</a> <a class="code" href="classprophet_1_1RIBDTLV.html#9b26b15fa1b5286d40b7eba91a8d39e6" title="Virtual from BaseTLV.">RIBDTLV::serialize</a>(u_char* bp, <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>)<span class="keyword"> const</span> <a name="l00067"></a>00067 <span class="keyword"></span>{ <a name="l00068"></a>00068 <span class="comment">// weed out the oddball</span> <a name="l00069"></a>00069 <span class="keywordflow">if</span> (bp == NULL) <span class="keywordflow">return</span> 0; <a name="l00070"></a>00070 <span class="keywordflow">if</span> (<a class="code" href="classprophet_1_1BaseTLV.html#88263c57b5c2760ece631ce8943c6249" title="typecode for this TLV">typecode_</a> != <a class="code" href="classprophet_1_1BaseTLV.html#37c3690d6040c870b40fa0436b67b09de5615891dad0b40891a124fcff00f562">BaseTLV::RIBD_TLV</a>) <span class="keywordflow">return</span> 0; <a name="l00071"></a>00071 <a name="l00072"></a>00072 <span class="comment">// estimate final size of TLV, check length of inbound buffer</span> <a name="l00073"></a>00073 <span class="keywordtype">size_t</span> ribd_sz = <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#250334386542b62223dc658ecceacf66" title="Helper function for serializing, where RASsz is the sizeof(RoutingAddressString)...">guess_ribd_size</a>(<a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a>); <a name="l00074"></a>00074 <span class="keywordflow">if</span> (ribd_sz + <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a> > len) <span class="keywordflow">return</span> 0; <a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="comment">// initialize accounting</span> <a name="l00077"></a>00077 <span class="keywordtype">size_t</span> ribd_entry_count = 0; <a name="l00078"></a>00078 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> = 0; <a name="l00079"></a>00079 <a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html" title="Routing Information Base Dictionary TLV p.">RIBDTLVHeader</a>* hdr = (<a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html" title="Routing Information Base Dictionary TLV p.">RIBDTLVHeader</a>*) bp; <a name="l00080"></a>00080 memset(hdr,0,<a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>); <a name="l00081"></a>00081 <a name="l00082"></a>00082 <span class="comment">// write out to buffer, skipping header (for now)</span> <a name="l00083"></a>00083 bp += <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00084"></a>00084 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> += <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00085"></a>00085 <a name="l00086"></a>00086 <span class="comment">// write out individual RIBD entries </span> <a name="l00087"></a>00087 <span class="keywordflow">for</span> (<a class="code" href="classprophet_1_1Dictionary.html#80622a2076a9267f6131aadb9f865e05">Dictionary::const_iterator</a> i = <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#01530ae50e9191b36cc2b56593725584" title="Iterators.">begin</a>(); i != <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#de4bd30ae5e6a17e1acb4c1730432d62" title="Iterators.">end</a>(); i++) <a name="l00088"></a>00088 { <a name="l00089"></a>00089 <span class="comment">// shouldn't happen, but test anyways</span> <a name="l00090"></a>00090 <span class="keywordflow">if</span> ((*i).first < 2) <a name="l00091"></a>00091 <span class="keywordflow">continue</span>; <span class="comment">// local and remote peers are implied as 0 and 1</span> <a name="l00092"></a>00092 <a name="l00093"></a>00093 <span class="keywordtype">size_t</span> bytes_written = 0; <a name="l00094"></a>00094 <span class="keywordflow">if</span> ((bytes_written = <a name="l00095"></a>00095 <a class="code" href="classprophet_1_1RIBDTLV.html#cb9d5d3a603d208a7c4d880e4b8cb7a7" title="Serialize destination ID out to buffer bp, size len, using struct RoutingAddressString;...">write_ras_entry</a>((*i).first,(*i).second,bp,len)) == 0) <a name="l00096"></a>00096 <span class="keywordflow">break</span>; <a name="l00097"></a>00097 <a name="l00098"></a>00098 bp += bytes_written; <a name="l00099"></a>00099 len -= bytes_written; <a name="l00100"></a>00100 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> += bytes_written; <a name="l00101"></a>00101 <a name="l00102"></a>00102 ribd_entry_count++; <a name="l00103"></a>00103 } <a name="l00104"></a>00104 <a name="l00105"></a>00105 <span class="comment">// fill in header for amounts successfully written </span> <a name="l00106"></a>00106 hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#7e973119937426ec51581346eaa0d893" title="defined as 0xA0">type</a> = <a class="code" href="classprophet_1_1BaseTLV.html#37c3690d6040c870b40fa0436b67b09de5615891dad0b40891a124fcff00f562">BaseTLV::RIBD_TLV</a>; <a name="l00107"></a>00107 hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#89a63585e45d8212ea3e727523d27c52" title="TBD.">flags</a> = 0; <a name="l00108"></a>00108 hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#88bce088c07fa1aa92fa15f06a1ea14f" title="Length of the TLV in octets, including the TLV header and any nested TLVs.">length</a> = htons(<a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a>); <a name="l00109"></a>00109 hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#c63ec92076569045ba86dccdcb4096b7" title="Number of entries in the database.">entry_count</a> = htons(ribd_entry_count); <a name="l00110"></a>00110 <a name="l00111"></a>00111 <span class="keywordflow">return</span> <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a>; <a name="l00112"></a>00112 } <a name="l00113"></a>00113 <a name="l00114"></a>00114 <span class="keywordtype">size_t</span> <a name="l00115"></a><a class="code" href="classprophet_1_1RIBDTLV.html#9d4063bccf8158d2b46d84689bc5739d">00115</a> <a class="code" href="classprophet_1_1RIBDTLV.html#9d4063bccf8158d2b46d84689bc5739d" title="Deserialize RoutingAddressString struct from transport into memory, setting *sid...">RIBDTLV::read_ras_entry</a>(u_int16_t* sid, <a name="l00116"></a>00116 std::string& dest_id, <a name="l00117"></a>00117 <span class="keyword">const</span> u_char* bp, <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>) <a name="l00118"></a>00118 { <a name="l00119"></a>00119 <span class="comment">// weed out the oddball</span> <a name="l00120"></a>00120 <span class="keywordflow">if</span> (sid == NULL || bp == NULL) <span class="keywordflow">return</span> 0; <a name="l00121"></a>00121 <a name="l00122"></a>00122 <span class="comment">// reject too-tight bounds</span> <a name="l00123"></a>00123 <span class="keywordflow">if</span> (<a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a> > len) <span class="keywordflow">return</span> 0; <a name="l00124"></a>00124 <a name="l00125"></a>00125 <a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html" title="Routing Address String (entry in RIBD above) p.">RoutingAddressString</a>* ras = (<a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html" title="Routing Address String (entry in RIBD above) p.">RoutingAddressString</a>*) bp; <a name="l00126"></a>00126 <a name="l00127"></a>00127 <span class="comment">// initialize to sizeof overhead</span> <a name="l00128"></a>00128 <span class="keywordtype">size_t</span> retval = <a class="code" href="classprophet_1_1RIBDTLV.html#557314304a9645a753d24f5580dbd61c">RoutingAddressStringSize</a>; <a name="l00129"></a>00129 <a name="l00130"></a>00130 <span class="comment">// must be even multiple of 4 bytes</span> <a name="l00131"></a>00131 <span class="keywordtype">size_t</span> copylen = <a class="code" href="Announce_8h.html#10fb10f052238243f08749f41a8374a6">FOUR_BYTE_ALIGN</a>(ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#704a55c844d9090887addcb7f885bf94" title="Length of Address String.">length</a>); <a name="l00132"></a>00132 <a name="l00133"></a>00133 <span class="comment">// make sure the lengths match up</span> <a name="l00134"></a>00134 <span class="keywordflow">if</span> (copylen > len - retval) <span class="keywordflow">return</span> retval; <a name="l00135"></a>00135 <a name="l00136"></a>00136 <span class="comment">// read into memory</span> <a name="l00137"></a>00137 *sid = ntohs(ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#4867d857340fbdc4b5004dfc2a3df51f" title="16 bit identifier that is constant for the duration of a session.">string_id</a>); <a name="l00138"></a>00138 dest_id.assign((<span class="keywordtype">char</span>*)&ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#ab006316583f2ae6310af91023fce749">ra_string</a>[0],ras-><a class="code" href="structprophet_1_1RIBDTLV_1_1RoutingAddressString.html#704a55c844d9090887addcb7f885bf94" title="Length of Address String.">length</a>); <a name="l00139"></a>00139 <a name="l00140"></a>00140 <span class="comment">// count what we read</span> <a name="l00141"></a>00141 retval += copylen; <a name="l00142"></a>00142 <a name="l00143"></a>00143 <span class="keywordflow">return</span> retval; <a name="l00144"></a>00144 } <a name="l00145"></a>00145 <a name="l00146"></a>00146 <span class="keywordtype">bool</span> <a name="l00147"></a><a class="code" href="classprophet_1_1RIBDTLV.html#e5e6e89ef24b6bfa3c5d0ee0c97f3f55">00147</a> <a class="code" href="classprophet_1_1RIBDTLV.html#e5e6e89ef24b6bfa3c5d0ee0c97f3f55" title="Virtual from BaseTLV.">RIBDTLV::deserialize</a>(<span class="keyword">const</span> u_char* bp, <span class="keywordtype">size_t</span> <a class="code" href="num2sdnv_8c.html#fed088663f8704004425cdae2120b9b3">len</a>) <a name="l00148"></a>00148 { <a name="l00149"></a>00149 <a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html" title="Routing Information Base Dictionary TLV p.">RIBDTLVHeader</a>* hdr = (<a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html" title="Routing Information Base Dictionary TLV p.">RIBDTLVHeader</a>*) bp; <a name="l00150"></a>00150 <a name="l00151"></a>00151 <span class="comment">// weed out the oddball</span> <a name="l00152"></a>00152 <span class="keywordflow">if</span> (bp == NULL) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00153"></a>00153 <a name="l00154"></a>00154 <span class="comment">// Enforce typecode expectation</span> <a name="l00155"></a>00155 <span class="keywordflow">if</span> (hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#7e973119937426ec51581346eaa0d893" title="defined as 0xA0">type</a> != <a class="code" href="classprophet_1_1BaseTLV.html#37c3690d6040c870b40fa0436b67b09de5615891dad0b40891a124fcff00f562">RIBD_TLV</a>) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00156"></a>00156 <a name="l00157"></a>00157 <span class="comment">// Inbound buffer must be at least as big as the overhead</span> <a name="l00158"></a>00158 <span class="keywordflow">if</span> (len < <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00159"></a>00159 <a name="l00160"></a>00160 <span class="comment">// Fail out if lengths don't match up</span> <a name="l00161"></a>00161 <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a> = ntohs(hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#88bce088c07fa1aa92fa15f06a1ea14f" title="Length of the TLV in octets, including the TLV header and any nested TLVs.">length</a>); <a name="l00162"></a>00162 <span class="keywordflow">if</span> (len < <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a>) <span class="keywordflow">return</span> <span class="keyword">false</span>; <a name="l00163"></a>00163 <a name="l00164"></a>00164 <a class="code" href="classprophet_1_1BaseTLV.html#31f1ebbf538b5b28c42e49e1eef6a34e" title="TLV-specific flags.">flags_</a> = hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#89a63585e45d8212ea3e727523d27c52" title="TBD.">flags</a>; <a name="l00165"></a>00165 <a name="l00166"></a>00166 <span class="keywordtype">size_t</span> ribd_entry_count = ntohs(hdr-><a class="code" href="structprophet_1_1RIBDTLV_1_1RIBDTLVHeader.html#c63ec92076569045ba86dccdcb4096b7" title="Number of entries in the database.">entry_count</a>); <a name="l00167"></a>00167 <a name="l00168"></a>00168 <span class="comment">// Now that the header is parsed, move past to the first RIBD entry</span> <a name="l00169"></a>00169 bp += <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00170"></a>00170 <a name="l00171"></a>00171 <span class="keywordtype">size_t</span> amt_read = <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00172"></a>00172 len -= <a class="code" href="classprophet_1_1RIBDTLV.html#0462e2f66d58cf097d5d759e9d3d2e27">RIBDTLVHeaderSize</a>; <a name="l00173"></a>00173 <a name="l00174"></a>00174 u_int16_t sid; <a name="l00175"></a>00175 std::string dest_id; <a name="l00176"></a>00176 <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#dc4702ba4c07259ab17cedaa48786723" title="Wipe out dictionary and prepare to deserialize new one.">clear</a>(); <a name="l00177"></a>00177 <span class="keywordflow">while</span> (ribd_entry_count-- > 0) <a name="l00178"></a>00178 { <a name="l00179"></a>00179 <span class="comment">// deserialize RAS from buffer</span> <a name="l00180"></a>00180 <span class="keywordtype">size_t</span> bytes_read = <a class="code" href="classprophet_1_1RIBDTLV.html#9d4063bccf8158d2b46d84689bc5739d" title="Deserialize RoutingAddressString struct from transport into memory, setting *sid...">read_ras_entry</a>(&sid,dest_id,bp,len); <a name="l00181"></a>00181 <a name="l00182"></a>00182 <span class="comment">// abort on error</span> <a name="l00183"></a>00183 <span class="keywordflow">if</span> (bytes_read == 0) <span class="keywordflow">break</span>; <a name="l00184"></a>00184 <a name="l00185"></a>00185 <span class="comment">// store this dictionary entry</span> <a name="l00186"></a>00186 <span class="keywordflow">if</span>(<a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#4f785ed38d15266fd52f82bfe2a3259a" title="Assign dest_id to arbitrary id (used by TLV deserialization); return true upon success...">assign</a>(dest_id,sid) == <span class="keyword">false</span>) <span class="keywordflow">break</span>; <a name="l00187"></a>00187 <a name="l00188"></a>00188 len -= bytes_read; <a name="l00189"></a>00189 bp += bytes_read; <a name="l00190"></a>00190 amt_read += bytes_read; <a name="l00191"></a>00191 } <a name="l00192"></a>00192 <a name="l00193"></a>00193 <span class="keywordflow">return</span> (amt_read == <a class="code" href="classprophet_1_1BaseTLV.html#4c0a7b24b795bafb52c16b24a6188823" title="serialized length of TLV, mutable so it can be assigned by serialize() const">length_</a>); <a name="l00194"></a>00194 } <a name="l00195"></a>00195 <a name="l00196"></a>00196 <span class="keyword">const</span> <a class="code" href="classprophet_1_1Dictionary.html" title="Utility class to facilitate converting to and from routing string (endpoint ID) and...">Dictionary</a>& <a name="l00197"></a><a class="code" href="classprophet_1_1RIBDTLV.html#f61522c27a15c1321df154b44392459b">00197</a> <a class="code" href="classprophet_1_1RIBDTLV.html#f61522c27a15c1321df154b44392459b" title="Accessor.">RIBDTLV::ribd</a>(<span class="keyword">const</span> std::string& sender, <span class="keyword">const</span> std::string& receiver) <a name="l00198"></a>00198 { <a name="l00199"></a>00199 <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#4f785ed38d15266fd52f82bfe2a3259a" title="Assign dest_id to arbitrary id (used by TLV deserialization); return true upon success...">assign</a>(sender,0); <a name="l00200"></a>00200 <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>.<a class="code" href="classprophet_1_1Dictionary.html#4f785ed38d15266fd52f82bfe2a3259a" title="Assign dest_id to arbitrary id (used by TLV deserialization); return true upon success...">assign</a>(receiver,1); <a name="l00201"></a>00201 <span class="keywordflow">return</span> <a class="code" href="classprophet_1_1RIBDTLV.html#5aab54c6e1a12bb1846b2a3f299d1ff6" title="mapping from destination id string to numeric id (sid)">ribd_</a>; <a name="l00202"></a>00202 } <a name="l00203"></a>00203 <a name="l00204"></a>00204 }; <span class="comment">// namespace prophet</span> </pre></div></div> <hr size="1"><address style="text-align: right;"><small>Generated on Mon Jul 21 14:09:46 2008 for DTN Reference Implementation by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address> </body> </html>