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<h1>Decider.cc</h1><a href="Decider_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 "<a class="code" href="Decider_8h.html">Decider.h</a>"</span>
<a name="l00018"></a>00018
<a name="l00019"></a><a class="code" href="Decider_8cc.html#259e390b81bb640af4691776b15a9116">00019</a> <span class="preprocessor">#define LOG(_args...) if (core_ != NULL) core_->print_log("decider", \</span>
<a name="l00020"></a>00020 <span class="preprocessor"> BundleCore::LOG_DEBUG, _args)</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span>
<a name="l00022"></a>00022 <span class="keyword">namespace </span>prophet
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024
<a name="l00025"></a>00025 FwdDeciderGRTR::FwdDeciderGRTR(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00026"></a>00026 <span class="keyword">const</span> Link* nexthop,
<a name="l00027"></a>00027 BundleCore* core,
<a name="l00028"></a>00028 <span class="keyword">const</span> Table* local,
<a name="l00029"></a>00029 <span class="keyword">const</span> Table* remote,
<a name="l00030"></a>00030 <span class="keyword">const</span> Stats* stats,
<a name="l00031"></a>00031 <span class="keywordtype">bool</span> relay)
<a name="l00032"></a>00032 : Decider(fs,nexthop,core,local,remote,stats,relay) {}
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keywordtype">bool</span>
<a name="l00035"></a>00035 FwdDeciderGRTR::operator()(<span class="keyword">const</span> Bundle* b)<span class="keyword"> const</span>
<a name="l00036"></a>00036 <span class="keyword"></span>{
<a name="l00037"></a>00037 <span class="comment">// weed out the oddball</span>
<a name="l00038"></a>00038 <span class="keywordflow">if</span> (b == NULL) <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// ask the core about status first</span>
<a name="l00041"></a>00041 <span class="keywordflow">if</span> (!core_->should_fwd(b,next_hop_))
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"core declined to fwd %s %u:%u"</span>,
<a name="l00044"></a>00044 b->destination_id().c_str(),
<a name="l00045"></a>00045 b->creation_ts(), b->sequence_num());
<a name="l00046"></a>00046 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="keywordflow">if</span> (core_->is_route(b->destination_id(),next_hop_->remote_eid()))
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: %s is destination for bundle %s %u:%u"</span>,
<a name="l00052"></a>00052 next_hop_->remote_eid(),b->destination_id().c_str(),
<a name="l00053"></a>00053 b->creation_ts(),b->sequence_num());
<a name="l00054"></a>00054 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056 <span class="comment">// if no route match and remote is not a relay,</span>
<a name="l00057"></a>00057 <span class="comment">// don't bother forwarding this bundle</span>
<a name="l00058"></a>00058 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!is_relay_)
<a name="l00059"></a>00059 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 std::string dest_eid = core_->get_route(b->destination_id());
<a name="l00062"></a>00062 <span class="comment">// forward if remote's predictability is greater than local's</span>
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (local_->p_value(dest_eid) < remote_->p_value(dest_eid))
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: %s is better route for bundle %s %u:%u "</span>
<a name="l00066"></a>00066 <span class="stringliteral">"(%.2f > %.2f)"</span>, next_hop_->remote_eid(),b->destination_id().c_str(),
<a name="l00067"></a>00067 b->creation_ts(),b->sequence_num(),
<a name="l00068"></a>00068 remote_->p_value(b), local_->p_value(b));
<a name="l00069"></a>00069 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// no reason to forward</span>
<a name="l00073"></a>00073 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075
<a name="l00076"></a>00076 FwdDeciderGTMX::FwdDeciderGTMX(FwdStrategy::fwd_strategy_t fs,
<a name="l00077"></a>00077 <span class="keyword">const</span> Link* nexthop,
<a name="l00078"></a>00078 BundleCore* core,
<a name="l00079"></a>00079 <span class="keyword">const</span> Table* local,
<a name="l00080"></a>00080 <span class="keyword">const</span> Table* remote,
<a name="l00081"></a>00081 u_int max_fwd,
<a name="l00082"></a>00082 <span class="keywordtype">bool</span> relay)
<a name="l00083"></a>00083 : FwdDeciderGRTR(fs,nexthop,core,local,remote,NULL,relay),
<a name="l00084"></a>00084 max_fwd_(max_fwd) {}
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordtype">bool</span>
<a name="l00087"></a>00087 FwdDeciderGTMX::operator()(<span class="keyword">const</span> Bundle* b)<span class="keyword"> const</span>
<a name="l00088"></a>00088 <span class="keyword"></span>{
<a name="l00089"></a>00089 <span class="comment">// defer first refusal to base class </span>
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (! FwdDeciderGRTR::operator()(b))
<a name="l00091"></a>00091 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keywordflow">if</span> (core_->is_route(b->destination_id(),next_hop_->nexthop()))
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: %s is destination for bundle %s %u:%u"</span>,
<a name="l00096"></a>00096 next_hop_->remote_eid(),b->destination_id().c_str(),
<a name="l00097"></a>00097 b->creation_ts(),b->sequence_num());
<a name="l00098"></a>00098 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100 <span class="comment">// if no route match and remote is not a relay,</span>
<a name="l00101"></a>00101 <span class="comment">// don't bother forwarding this bundle</span>
<a name="l00102"></a>00102 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!is_relay_)
<a name="l00103"></a>00103 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// Check max fwd</span>
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (b->num_forward() < max_fwd_)
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: num_fwd(bundle %s %u:%u) == %u, max == %u"</span>,
<a name="l00109"></a>00109 b->destination_id().c_str(), b->creation_ts(),b->sequence_num(),
<a name="l00110"></a>00110 b->num_forward(), max_fwd_);
<a name="l00111"></a>00111 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">// Do not forward</span>
<a name="l00115"></a>00115 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118 FwdDeciderGRTRPLUS::FwdDeciderGRTRPLUS(FwdStrategy::fwd_strategy_t fs,
<a name="l00119"></a>00119 <span class="keyword">const</span> Link* nexthop,
<a name="l00120"></a>00120 BundleCore* core,
<a name="l00121"></a>00121 <span class="keyword">const</span> Table* local,
<a name="l00122"></a>00122 <span class="keyword">const</span> Table* remote,
<a name="l00123"></a>00123 <span class="keyword">const</span> Stats* stats,
<a name="l00124"></a>00124 <span class="keywordtype">bool</span> relay)
<a name="l00125"></a>00125 : FwdDeciderGRTR(fs,nexthop,core,local,remote,stats,relay) {}
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keywordtype">bool</span>
<a name="l00128"></a>00128 FwdDeciderGRTRPLUS::operator()(<span class="keyword">const</span> Bundle* b)<span class="keyword"> const</span>
<a name="l00129"></a>00129 <span class="keyword"></span>{
<a name="l00130"></a>00130 <span class="comment">// defer first refusal to base class </span>
<a name="l00131"></a>00131 <span class="keywordflow">if</span> (! FwdDeciderGRTR::operator()(b))
<a name="l00132"></a>00132 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (core_->is_route(b->destination_id(),next_hop_->nexthop()))
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: %s is destination for bundle %s %u:%u"</span>,
<a name="l00137"></a>00137 next_hop_->remote_eid(),b->destination_id().c_str(),
<a name="l00138"></a>00138 b->creation_ts(),b->sequence_num());
<a name="l00139"></a>00139 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141 <span class="comment">// if no route match and remote is not a relay,</span>
<a name="l00142"></a>00142 <span class="comment">// don't bother forwarding this bundle</span>
<a name="l00143"></a>00143 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!is_relay_)
<a name="l00144"></a>00144 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">// forward only if remote's P is greater than local's P_max</span>
<a name="l00147"></a>00147 <span class="keywordtype">bool</span> ok = stats_->get_p_max(b) < remote_->p_value(b);
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (ok)
<a name="l00149"></a>00149 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: remote p (%.2f) greater than max p (%.2f) for "</span>
<a name="l00150"></a>00150 <span class="stringliteral">"%s %u:%u"</span>, remote_->p_value(b), stats_->get_p_max(b),
<a name="l00151"></a>00151 b->destination_id().c_str(), b->creation_ts(),
<a name="l00152"></a>00152 b->sequence_num());
<a name="l00153"></a>00153 <span class="keywordflow">return</span> ok;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155
<a name="l00156"></a>00156 FwdDeciderGTMXPLUS::FwdDeciderGTMXPLUS(FwdStrategy::fwd_strategy_t fs,
<a name="l00157"></a>00157 <span class="keyword">const</span> Link* nexthop,
<a name="l00158"></a>00158 BundleCore* core,
<a name="l00159"></a>00159 <span class="keyword">const</span> Table* local,
<a name="l00160"></a>00160 <span class="keyword">const</span> Table* remote,
<a name="l00161"></a>00161 <span class="keyword">const</span> Stats* stats,
<a name="l00162"></a>00162 u_int max_forward,
<a name="l00163"></a>00163 <span class="keywordtype">bool</span> relay)
<a name="l00164"></a>00164 : FwdDeciderGRTRPLUS(fs,nexthop,core,local,remote,stats,relay),
<a name="l00165"></a>00165 max_fwd_(max_forward) {}
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordtype">bool</span>
<a name="l00168"></a>00168 FwdDeciderGTMXPLUS::operator()(<span class="keyword">const</span> Bundle* b)<span class="keyword"> const</span>
<a name="l00169"></a>00169 <span class="keyword"></span>{
<a name="l00170"></a>00170 <span class="comment">// defer first refusal to base class </span>
<a name="l00171"></a>00171 <span class="keywordflow">if</span> (! FwdDeciderGRTRPLUS::operator()(b))
<a name="l00172"></a>00172 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="keywordflow">if</span> (core_->is_route(b->destination_id(),next_hop_->nexthop()))
<a name="l00175"></a>00175 {
<a name="l00176"></a>00176 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: %s is destination for bundle %s %u:%u"</span>,
<a name="l00177"></a>00177 next_hop_->remote_eid(),b->destination_id().c_str(),
<a name="l00178"></a>00178 b->creation_ts(),b->sequence_num());
<a name="l00179"></a>00179 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="comment">// if no route match and remote is not a relay,</span>
<a name="l00183"></a>00183 <span class="comment">// don't bother forwarding this bundle</span>
<a name="l00184"></a>00184 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!is_relay_)
<a name="l00185"></a>00185 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="keywordtype">bool</span> num_fwd_ok = b->num_forward() < max_fwd_;
<a name="l00188"></a>00188 <span class="keywordtype">bool</span> p_max_ok = stats_->get_p_max(b) < remote_->p_value(b);
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (num_fwd_ok && p_max_ok)
<a name="l00191"></a>00191 <a class="code" href="BundleOffer_8cc.html#259e390b81bb640af4691776b15a9116">LOG</a>(<span class="stringliteral">"ok to fwd: NF (%u) < maxNF (%u) and remote p (%.2f) > "</span>
<a name="l00192"></a>00192 <span class="stringliteral">"max (%.2f) for %s %u:%u"</span>,b->num_forward(), max_fwd_,
<a name="l00193"></a>00193 remote_->p_value(b), stats_->get_p_max(b),
<a name="l00194"></a>00194 b->destination_id().c_str(), b->creation_ts(),
<a name="l00195"></a>00195 b->sequence_num());
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="keywordflow">return</span> num_fwd_ok && p_max_ok;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199
<a name="l00200"></a>00200 }; <span class="comment">// namespace prophet</span>
</pre></div></div>
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