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<h1>Decider.h</h1><a href="Decider_8h.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">#ifndef _PROPHET_DECIDER_H_</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define _PROPHET_DECIDER_H_</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include "<a class="code" href="prophet_2Bundle_8h.html">Bundle.h</a>"</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include "<a class="code" href="prophet_2Link_8h.html">Link.h</a>"</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="Stats_8h.html">Stats.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="FwdStrategy_8h.html">FwdStrategy.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="BundleCore_8h.html">BundleCore.h</a>"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keyword">namespace </span>prophet
<a name="l00027"></a>00027 {
<a name="l00028"></a>00028
<a name="l00033"></a>00033 <span class="keyword">class </span>Decider
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00039"></a>00039 <span class="keyword">virtual</span> ~Decider() {}
<a name="l00040"></a>00040
<a name="l00044"></a>00044 <span class="keyword">static</span> <span class="keyword">inline</span> Decider* decider(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00045"></a>00045 <span class="keyword">const</span> Link* nexthop,
<a name="l00046"></a>00046 BundleCore* core,
<a name="l00047"></a>00047 <span class="keyword">const</span> Table* local_nodes,
<a name="l00048"></a>00048 <span class="keyword">const</span> Table* remote_nodes,
<a name="l00049"></a>00049 <span class="keyword">const</span> Stats* stats = NULL,
<a name="l00050"></a>00050 u_int max_forward = 0,
<a name="l00051"></a>00051 <span class="keywordtype">bool</span> is_relay = <span class="keyword">true</span>);
<a name="l00052"></a>00052
<a name="l00057"></a>00057 <span class="keyword">virtual</span> <span class="keywordtype">bool</span> operator() (<span class="keyword">const</span> Bundle*) <span class="keyword">const</span> = 0;
<a name="l00058"></a>00058
<a name="l00060"></a>00060 <a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fwd_strategy()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> fwd_strategy_; }
<a name="l00061"></a>00061 <span class="keyword">const</span> Link* nexthop()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> next_hop_; }
<a name="l00062"></a>00062 <span class="keyword">const</span> BundleCore* core()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> core_; }
<a name="l00063"></a>00063 <span class="keyword">const</span> Table* local_nodes()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> local_; }
<a name="l00064"></a>00064 <span class="keyword">const</span> Table* remote_nodes()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> remote_; }
<a name="l00065"></a>00065 <span class="keyword">const</span> Stats* stats()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> stats_; }
<a name="l00066"></a>00066 <span class="keywordtype">bool</span> is_relay()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> is_relay_; }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keyword">protected</span>:
<a name="l00073"></a>00073 Decider(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00074"></a>00074 <span class="keyword">const</span> Link* nexthop,
<a name="l00075"></a>00075 BundleCore* core,
<a name="l00076"></a>00076 <span class="keyword">const</span> Table* local, <span class="keyword">const</span> Table* remote,
<a name="l00077"></a>00077 <span class="keyword">const</span> Stats* stats, <span class="keywordtype">bool</span> is_relay)
<a name="l00078"></a>00078 : fwd_strategy_(fs),
<a name="l00079"></a>00079 next_hop_(nexthop),
<a name="l00080"></a>00080 core_(core), local_(local), remote_(remote),
<a name="l00081"></a>00081 stats_(stats), is_relay_(is_relay) {}
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fwd_strategy_;
<a name="l00084"></a>00084 <span class="keyword">const</span> Link* next_hop_;
<a name="l00085"></a>00085 BundleCore* <span class="keyword">const</span> core_;
<a name="l00086"></a>00086 <span class="keyword">const</span> Table* local_;
<a name="l00087"></a>00087 <span class="keyword">const</span> Table* remote_;
<a name="l00088"></a>00088 <span class="keyword">const</span> Stats* stats_;
<a name="l00089"></a>00089 <span class="keywordtype">bool</span> is_relay_;
<a name="l00090"></a>00090
<a name="l00091"></a>00091 }; <span class="comment">// class Decider</span>
<a name="l00092"></a>00092
<a name="l00097"></a>00097 <span class="keyword">class </span>FwdDeciderGRTR : <span class="keyword">public</span> Decider
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 <span class="keyword">public</span>:
<a name="l00103"></a>00103 <span class="keyword">virtual</span> ~FwdDeciderGRTR() {}
<a name="l00104"></a>00104
<a name="l00108"></a>00108 <span class="keywordtype">bool</span> operator() (<span class="keyword">const</span> Bundle*) <span class="keyword">const</span>;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keyword">protected</span>:
<a name="l00111"></a>00111 <span class="keyword">friend</span> <span class="keyword">class </span>Decider; <span class="comment">// for factory method</span>
<a name="l00112"></a>00112
<a name="l00116"></a>00116 FwdDeciderGRTR(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00117"></a>00117 <span class="keyword">const</span> Link* nexthop, BundleCore* core,
<a name="l00118"></a>00118 <span class="keyword">const</span> Table* local, <span class="keyword">const</span> Table* remote,
<a name="l00119"></a>00119 <span class="keyword">const</span> Stats* stats = NULL,
<a name="l00120"></a>00120 <span class="keywordtype">bool</span> relay = <span class="keyword">true</span>);
<a name="l00121"></a>00121 }; <span class="comment">// class FwdDeciderGRTR</span>
<a name="l00122"></a>00122
<a name="l00127"></a>00127 <span class="keyword">class </span>FwdDeciderGTMX : <span class="keyword">public</span> FwdDeciderGRTR
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="keyword">public</span>:
<a name="l00133"></a>00133 <span class="keyword">virtual</span> ~FwdDeciderGTMX() {}
<a name="l00134"></a>00134
<a name="l00138"></a>00138 <span class="keywordtype">bool</span> operator() (<span class="keyword">const</span> Bundle*) <span class="keyword">const</span>;
<a name="l00139"></a>00139
<a name="l00141"></a>00141 u_int max_forward()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> max_fwd_; }
<a name="l00143"></a>00143 <span class="keyword">protected</span>:
<a name="l00144"></a>00144 <span class="keyword">friend</span> <span class="keyword">class </span>Decider; <span class="comment">// for factory method</span>
<a name="l00145"></a>00145
<a name="l00149"></a>00149 FwdDeciderGTMX(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00150"></a>00150 <span class="keyword">const</span> Link* nexthop, BundleCore* core,
<a name="l00151"></a>00151 <span class="keyword">const</span> Table* local, <span class="keyword">const</span> Table* remote,
<a name="l00152"></a>00152 u_int max_fwd, <span class="keywordtype">bool</span> relay);
<a name="l00153"></a>00153
<a name="l00154"></a>00154 u_int max_fwd_;
<a name="l00155"></a>00155 }; <span class="comment">// class FwdDeciderGTMX</span>
<a name="l00156"></a>00156
<a name="l00162"></a>00162 <span class="keyword">class </span>FwdDeciderGRTRPLUS : <span class="keyword">public</span> FwdDeciderGRTR
<a name="l00163"></a>00163 {
<a name="l00164"></a>00164 <span class="keyword">public</span>:
<a name="l00168"></a>00168 <span class="keyword">virtual</span> ~FwdDeciderGRTRPLUS() {}
<a name="l00169"></a>00169
<a name="l00173"></a>00173 <span class="keywordtype">bool</span> operator() (<span class="keyword">const</span> Bundle*) <span class="keyword">const</span>;
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="keyword">protected</span>:
<a name="l00176"></a>00176 <span class="keyword">friend</span> <span class="keyword">class </span>Decider; <span class="comment">// for factory method</span>
<a name="l00177"></a>00177
<a name="l00181"></a>00181 FwdDeciderGRTRPLUS(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00182"></a>00182 <span class="keyword">const</span> Link* nexthop, BundleCore* core,
<a name="l00183"></a>00183 <span class="keyword">const</span> Table* local, <span class="keyword">const</span> Table* remote,
<a name="l00184"></a>00184 <span class="keyword">const</span> Stats* stats, <span class="keywordtype">bool</span> relay);
<a name="l00185"></a>00185
<a name="l00186"></a>00186 }; <span class="comment">// class FwdDeciderGRTRPLUS</span>
<a name="l00187"></a>00187
<a name="l00193"></a>00193 <span class="keyword">class </span>FwdDeciderGTMXPLUS : <span class="keyword">public</span> FwdDeciderGRTRPLUS
<a name="l00194"></a>00194 {
<a name="l00195"></a>00195 <span class="keyword">public</span>:
<a name="l00199"></a>00199 <span class="keyword">virtual</span> ~FwdDeciderGTMXPLUS() {}
<a name="l00200"></a>00200
<a name="l00204"></a>00204 <span class="keywordtype">bool</span> operator() (<span class="keyword">const</span> Bundle*) <span class="keyword">const</span>;
<a name="l00205"></a>00205
<a name="l00207"></a>00207 u_int max_forward()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> max_fwd_; }
<a name="l00209"></a>00209 <span class="keyword">protected</span>:
<a name="l00210"></a>00210 <span class="keyword">friend</span> <span class="keyword">class </span>Decider; <span class="comment">// for factory method</span>
<a name="l00211"></a>00211
<a name="l00215"></a>00215 FwdDeciderGTMXPLUS(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00216"></a>00216 <span class="keyword">const</span> Link* nexthop, BundleCore* core,
<a name="l00217"></a>00217 <span class="keyword">const</span> Table* local, <span class="keyword">const</span> Table* remote,
<a name="l00218"></a>00218 <span class="keyword">const</span> Stats* stats,
<a name="l00219"></a>00219 u_int max_forward, <span class="keywordtype">bool</span> relay);
<a name="l00220"></a>00220
<a name="l00221"></a>00221 u_int max_fwd_;
<a name="l00222"></a>00222 }; <span class="comment">// class FwdDeciderGTMXPLUS</span>
<a name="l00223"></a>00223
<a name="l00224"></a>00224 Decider*
<a name="l00225"></a>00225 Decider::decider(<a class="code" href="structprophet_1_1FwdStrategy.html#50567dba6d835926a1532568f6a46ff9" title="Forwarding strategies p.">FwdStrategy::fwd_strategy_t</a> fs,
<a name="l00226"></a>00226 <span class="keyword">const</span> Link* nexthop,
<a name="l00227"></a>00227 BundleCore* core,
<a name="l00228"></a>00228 <span class="keyword">const</span> Table* local_nodes,
<a name="l00229"></a>00229 <span class="keyword">const</span> Table* remote_nodes,
<a name="l00230"></a>00230 <span class="keyword">const</span> Stats* stats,
<a name="l00231"></a>00231 u_int max_forward,
<a name="l00232"></a>00232 <span class="keywordtype">bool</span> is_relay)
<a name="l00233"></a>00233 {
<a name="l00234"></a>00234 Decider* d = NULL;
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="comment">// weed out the oddball</span>
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (nexthop == NULL || nexthop->nexthop() == <span class="stringliteral">""</span>) <span class="keywordflow">return</span> NULL;
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (local_nodes == NULL) <span class="keywordflow">return</span> NULL;
<a name="l00239"></a>00239 <span class="keywordflow">if</span> (remote_nodes == NULL) <span class="keywordflow">return</span> NULL;
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="comment">// pick the decider based on strategy</span>
<a name="l00242"></a>00242 <span class="keywordflow">switch</span> (fs)
<a name="l00243"></a>00243 {
<a name="l00244"></a>00244 <span class="keywordflow">case</span> FwdStrategy::GRTR:
<a name="l00245"></a>00245 <span class="keywordflow">case</span> FwdStrategy::GRTR_SORT:
<a name="l00246"></a>00246 <span class="keywordflow">case</span> FwdStrategy::GRTR_MAX:
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 d = <span class="keyword">new</span> FwdDeciderGRTR(fs,nexthop,core,local_nodes,
<a name="l00249"></a>00249 remote_nodes,NULL,is_relay);
<a name="l00250"></a>00250 <span class="keywordflow">break</span>;
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252 <span class="keywordflow">case</span> FwdStrategy::GTMX:
<a name="l00253"></a>00253 {
<a name="l00254"></a>00254 <span class="keywordflow">if</span> (max_forward == 0) <span class="keywordflow">return</span> NULL;
<a name="l00255"></a>00255 d = <span class="keyword">new</span> FwdDeciderGTMX(fs,nexthop,core,local_nodes,
<a name="l00256"></a>00256 remote_nodes,max_forward,
<a name="l00257"></a>00257 is_relay);
<a name="l00258"></a>00258 <span class="keywordflow">break</span>;
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260 <span class="keywordflow">case</span> FwdStrategy::GRTR_PLUS:
<a name="l00261"></a>00261 {
<a name="l00262"></a>00262 <span class="keywordflow">if</span> (stats == NULL) <span class="keywordflow">return</span> NULL;
<a name="l00263"></a>00263 d = <span class="keyword">new</span> FwdDeciderGRTRPLUS(fs,nexthop,core,local_nodes,
<a name="l00264"></a>00264 remote_nodes,stats,is_relay);
<a name="l00265"></a>00265 <span class="keywordflow">break</span>;
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267 <span class="keywordflow">case</span> FwdStrategy::GTMX_PLUS:
<a name="l00268"></a>00268 {
<a name="l00269"></a>00269 <span class="keywordflow">if</span> (stats == NULL || max_forward == 0) <span class="keywordflow">return</span> NULL;
<a name="l00270"></a>00270 d = <span class="keyword">new</span> FwdDeciderGTMXPLUS(fs,nexthop,core,local_nodes,
<a name="l00271"></a>00271 remote_nodes,stats,max_forward,
<a name="l00272"></a>00272 is_relay);
<a name="l00273"></a>00273 <span class="keywordflow">break</span>;
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275 <span class="keywordflow">case</span> FwdStrategy::INVALID_FS:
<a name="l00276"></a>00276 <span class="keywordflow">default</span>:
<a name="l00277"></a>00277 <span class="keywordflow">break</span>;
<a name="l00278"></a>00278 }
<a name="l00279"></a>00279 <span class="keywordflow">return</span> d;
<a name="l00280"></a>00280 }
<a name="l00281"></a>00281
<a name="l00282"></a>00282 }; <span class="comment">// namespace prophet</span>
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="preprocessor">#endif // _PROPHET_DECIDER_H_</span>
</pre></div></div>
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