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<h1>BundleTLV.cc</h1><a href="BundleTLV_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="BundleTLV_8h.html">BundleTLV.h</a>"</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="keyword">namespace </span>prophet
<a name="l00021"></a>00021 {
<a name="l00022"></a>00022
<a name="l00023"></a><a class="code" href="classprophet_1_1BundleTLV.html#eeadbbb84b780c5d390a9f1e6318c850">00023</a> <span class="keywordtype">size_t</span> <a class="code" href="classprophet_1_1BundleTLV.html#eeadbbb84b780c5d390a9f1e6318c850" title="Serialize BundleOfferTLVEntry out to no more than len bytes of buffer; return bytes...">BundleTLV::write_bundle_entry</a>(u_int32_t cts, u_int32_t seq,
<a name="l00024"></a>00024 u_int16_t sid, <span class="keywordtype">bool</span> <a class="code" href="dtncat_8c.html#160881851a33309c0106503ac4d14d96">custody</a>,
<a name="l00025"></a>00025 <span class="keywordtype">bool</span> accept, <span class="keywordtype">bool</span> ack,
<a name="l00026"></a>00026 <a class="code" href="classprophet_1_1BundleTLVEntry.html#ba508cc555c3c88394dc4659c7e0d321" title="A BundleTLVEntry can represent either an OFFER or a RESPONSE, depending on what is...">BundleTLVEntry::bundle_entry_t</a> type,
<a name="l00027"></a>00027 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="l00028"></a>00028 <span class="keyword"></span>{
<a name="l00029"></a>00029 <span class="comment">// weed out the oddball</span>
<a name="l00030"></a>00030 <span class="keywordflow">if</span> (bp == NULL) <span class="keywordflow">return</span> 0;
<a name="l00031"></a>00031 <span class="keywordflow">if</span> (type == <a class="code" href="classprophet_1_1BundleTLVEntry.html#ba508cc555c3c88394dc4659c7e0d3215a1a084212865f78c542f8c458201a19" title="no valid type has been specified">BundleTLVEntry::UNDEFINED</a>) <span class="keywordflow">return</span> 0;
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">// check that lengths match up</span>
<a name="l00034"></a>00034 <span class="keywordflow">if</span> (<a class="code" href="classprophet_1_1BundleTLV.html#a7921e77cc4c5585d79932a24b8a7927">BundleEntrySize</a> > len) <span class="keywordflow">return</span> 0;
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="comment">// start writing out to buffer</span>
<a name="l00037"></a>00037 <a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html" title="Bundle Offer/Response Entry p.">BundleEntry</a>* b = (<a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html" title="Bundle Offer/Response Entry p.">BundleEntry</a>*) bp;
<a name="l00038"></a>00038 memset(b, 0, <a class="code" href="classprophet_1_1BundleTLV.html#a7921e77cc4c5585d79932a24b8a7927">BundleEntrySize</a>);
<a name="l00039"></a>00039 <span class="keywordflow">if</span> (custody) b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#ec6a1db808161d1ef23f1ec53bbef43f" title="The encoding of the B_Flags in the request are: Flag 0: Custody Offered 0b1 ...">b_flags</a> |= <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b0e2665233fe415bb8a081d2e4aea1be9" title="custody offered or accepted on this bundle">CUSTODY</a>;
<a name="l00040"></a>00040 <span class="keywordflow">if</span> (accept) b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#ec6a1db808161d1ef23f1ec53bbef43f" title="The encoding of the B_Flags in the request are: Flag 0: Custody Offered 0b1 ...">b_flags</a> |= <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2bb1f7b9b43eb9277a9e6e42a569736a6e" title="this bundle is accepted for relay">ACCEPTED</a>;
<a name="l00041"></a>00041 <span class="keywordflow">if</span> (ack) b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#ec6a1db808161d1ef23f1ec53bbef43f" title="The encoding of the B_Flags in the request are: Flag 0: Custody Offered 0b1 ...">b_flags</a> |= <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b15802a3008fb408e9a7c395c05e12084" title="Prophet ACK for this bundle.">ACK</a>;
<a name="l00042"></a>00042 b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#4ff9113e4adc4a078890ca02338326e3" title="ID string of the destination of the bundle as predefined in the dictionary TLV.">dest_string_id</a> = htons(sid);
<a name="l00043"></a>00043 b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#5110f61f9c020aaae4cce60884968404" title="This bundle&#39;s creation timestamp.">creation_timestamp</a> = htonl(cts);
<a name="l00044"></a>00044 b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#7f76d6a9e04deee6afa7bae73100f825" title="NOT IN SPEC.">seqno</a> = htonl(seq);
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="keywordflow">return</span> <a class="code" href="classprophet_1_1BundleTLV.html#a7921e77cc4c5585d79932a24b8a7927">BundleEntrySize</a>;
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a><a class="code" href="classprophet_1_1BundleTLV.html#4fe36522dccc0c81046b72e54d02d05c">00049</a> <span class="keywordtype">size_t</span> BundleTLV::read_bundle_entry(u_int32_t *cts, u_int32_t *seq,
<a name="l00050"></a>00050 u_int16_t *sid, <span class="keywordtype">bool</span> *<a class="code" href="dtncat_8c.html#160881851a33309c0106503ac4d14d96">custody</a>,
<a name="l00051"></a>00051 <span class="keywordtype">bool</span> *accept, <span class="keywordtype">bool</span> *ack,
<a name="l00052"></a>00052 <a class="code" href="classprophet_1_1BundleTLVEntry.html#ba508cc555c3c88394dc4659c7e0d321" title="A BundleTLVEntry can represent either an OFFER or a RESPONSE, depending on what is...">BundleTLVEntry::bundle_entry_t</a> *type,
<a name="l00053"></a>00053 <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="l00054"></a>00054 {
<a name="l00055"></a>00055 <span class="comment">// weed out the oddball</span>
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (bp == NULL ||
<a name="l00057"></a>00057 cts == NULL ||
<a name="l00058"></a>00058 seq == NULL ||
<a name="l00059"></a>00059 sid == NULL ||
<a name="l00060"></a>00060 custody == NULL ||
<a name="l00061"></a>00061 accept == NULL ||
<a name="l00062"></a>00062 ack == NULL ||
<a name="l00063"></a>00063 type == NULL) <span class="keywordflow">return</span> 0;
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="comment">// check that lengths match up</span>
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (<a class="code" href="classprophet_1_1BundleTLV.html#a7921e77cc4c5585d79932a24b8a7927">BundleEntrySize</a> > len) <span class="keywordflow">return</span> 0;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="comment">// start reading in the entry</span>
<a name="l00069"></a>00069 <a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html" title="Bundle Offer/Response Entry p.">BundleEntry</a>* b = (<a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html" title="Bundle Offer/Response Entry p.">BundleEntry</a>*) bp;
<a name="l00070"></a>00070 u_int8_t <a class="code" href="classprophet_1_1BaseTLV.html#85ccaab1420732e2f1e327798b8899ed" title="Accessors.">flags</a> = b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#ec6a1db808161d1ef23f1ec53bbef43f" title="The encoding of the B_Flags in the request are: Flag 0: Custody Offered 0b1 ...">b_flags</a> & 0xff; <span class="comment">// mask out one byte</span>
<a name="l00071"></a>00071 *custody = ((flags & <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b0e2665233fe415bb8a081d2e4aea1be9" title="custody offered or accepted on this bundle">CUSTODY</a>) == <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b0e2665233fe415bb8a081d2e4aea1be9" title="custody offered or accepted on this bundle">CUSTODY</a>);
<a name="l00072"></a>00072 *accept = ((flags & <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2bb1f7b9b43eb9277a9e6e42a569736a6e" title="this bundle is accepted for relay">ACCEPTED</a>) == <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2bb1f7b9b43eb9277a9e6e42a569736a6e" title="this bundle is accepted for relay">ACCEPTED</a>);
<a name="l00073"></a>00073 *ack = ((flags & <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b15802a3008fb408e9a7c395c05e12084" title="Prophet ACK for this bundle.">ACK</a>) == <a class="code" href="classprophet_1_1BundleTLV.html#1d398f4325d6d724d3e807cc9dd25a2b15802a3008fb408e9a7c395c05e12084" title="Prophet ACK for this bundle.">ACK</a>);
<a name="l00074"></a>00074 <span class="comment">// infer whether OFFER or RESPONSE</span>
<a name="l00075"></a>00075 *type = <a class="code" href="classprophet_1_1BundleTLVEntry.html#a183aaa6d8be0194a725569221b7cfc1" title="Utility function to decipher which Bundle_X_Entry type based on the combination of...">BundleTLVEntry::decode_flags</a>(*custody,*accept,*ack);
<a name="l00076"></a>00076 *sid = ntohs(b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#4ff9113e4adc4a078890ca02338326e3" title="ID string of the destination of the bundle as predefined in the dictionary TLV.">dest_string_id</a>);
<a name="l00077"></a>00077 *cts = ntohl(b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#5110f61f9c020aaae4cce60884968404" title="This bundle&#39;s creation timestamp.">creation_timestamp</a>);
<a name="l00078"></a>00078 *seq = ntohl(b-><a class="code" href="structprophet_1_1BundleTLV_1_1BundleEntry.html#7f76d6a9e04deee6afa7bae73100f825" title="NOT IN SPEC.">seqno</a>);
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keywordflow">return</span> <a class="code" href="classprophet_1_1BundleTLV.html#a7921e77cc4c5585d79932a24b8a7927">BundleEntrySize</a>;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 };
</pre></div></div>
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