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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) Fabasoft R&D Software GmbH & Co KG, 2003</span>
<a name="l00003"></a>00003 <span class="comment"> oss@fabasoft.com</span>
<a name="l00004"></a>00004 <span class="comment"> Author: Bernhard Penz <bernhard.penz@fabasoft.com></span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> modification, are permitted provided that the following conditions are met:</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> * Redistributions of source code must retain the above copyright notice,</span>
<a name="l00010"></a>00010 <span class="comment"> this list of conditions and the following disclaimer.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00013"></a>00013 <span class="comment"> notice, this list of conditions and the following disclaimer in the</span>
<a name="l00014"></a>00014 <span class="comment"> documentation and/or other materials provided with the distribution.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> * The name of Fabasoft R&D Software GmbH & Co KG or any of its subsidiaries, </span>
<a name="l00017"></a>00017 <span class="comment"> brand or product names may not be used to endorse or promote products </span>
<a name="l00018"></a>00018 <span class="comment"> derived from this software without specific prior written permission.</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY</span>
<a name="l00021"></a>00021 <span class="comment"> EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span>
<a name="l00022"></a>00022 <span class="comment"> IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00023"></a>00023 <span class="comment"> PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE</span>
<a name="l00024"></a>00024 <span class="comment"> LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR</span>
<a name="l00025"></a>00025 <span class="comment"> CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF</span>
<a name="l00026"></a>00026 <span class="comment"> SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR</span>
<a name="l00027"></a>00027 <span class="comment"> BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,</span>
<a name="l00028"></a>00028 <span class="comment"> WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE</span>
<a name="l00029"></a>00029 <span class="comment"> OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN</span>
<a name="l00030"></a>00030 <span class="comment"> IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00031"></a>00031 <span class="comment">*/</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="preprocessor">#ifdef WIN32</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <io.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <winsock.h></span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">int</span> InitUPDSocket(SOCKET *sock, <span class="keyword">struct</span> sockaddr_in *socketaddress)
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 *sock = 0;
<a name="l00041"></a>00041 memset(socketaddress, 0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_in));
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keywordflow">if</span>( (*sock = socket(AF_INET, SOCK_DGRAM, 0)) == SOCKET_ERROR)
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="keywordflow">return</span> -1;
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 socketaddress->sin_family = AF_INET;
<a name="l00048"></a>00048 socketaddress->sin_addr.S_un.S_addr = htonl(INADDR_LOOPBACK);
<a name="l00049"></a>00049 socketaddress->sin_port = 0;
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="keywordflow">if</span>(bind(*sock, (<span class="keyword">struct</span> sockaddr *) socketaddress, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr)) == SOCKET_ERROR)
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 <span class="keywordflow">return</span> -1;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keywordflow">return</span> 0;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keyword">static</span> <span class="keywordtype">int</span> ConnectUDPSocket(SOCKET *sock, <span class="keyword">struct</span> sockaddr_in *socketaddress, SOCKET *remotesocket)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordtype">int</span> size = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr);
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (getsockname(*sock, (<span class="keyword">struct</span> sockaddr *) socketaddress, &size) == SOCKET_ERROR)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="keywordflow">return</span> -1;
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordflow">if</span>(size != <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr))
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 <span class="keywordflow">return</span> -1;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (connect(*remotesocket, (<span class="keyword">struct</span> sockaddr *) socketaddress, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr)) == SOCKET_ERROR)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 <span class="keywordflow">return</span> -1;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordflow">return</span> 0;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keyword">static</span> <span class="keywordtype">int</span> TestUDPSend(SOCKET *sock, <span class="keyword">struct</span> sockaddr_in *socketaddress)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> port = socketaddress->sin_port;
<a name="l00083"></a>00083 <span class="keywordtype">int</span> size = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr);
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordtype">int</span> bytessent = send(*sock, (<span class="keywordtype">char</span> *) &port, <span class="keyword">sizeof</span>(port), 0);
<a name="l00086"></a>00086 <span class="keywordflow">if</span>(bytessent != <span class="keyword">sizeof</span>(port))
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keywordflow">return</span> -1;
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keywordflow">return</span> 0;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="keyword">static</span> <span class="keywordtype">int</span> TestUDPReceive(SOCKET *sock, SOCKET *remotesocket, <span class="keyword">struct</span> sockaddr_in *remotesocketaddress)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keyword">struct </span>sockaddr_in recvfromaddress;
<a name="l00097"></a>00097 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> readbuffer[2];
<a name="l00098"></a>00098 <span class="keywordtype">int</span> size = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr);
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordtype">int</span> bytesreceived = recvfrom(*sock,(<span class="keywordtype">char</span> *) &readbuffer, <span class="keyword">sizeof</span>(readbuffer), 0, (<span class="keyword">struct</span> sockaddr *) &recvfromaddress, &size) ;
<a name="l00101"></a>00101 <span class="keywordflow">if</span>(bytesreceived != <span class="keyword">sizeof</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span>) || size != <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr) || readbuffer[0] != (<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span>) remotesocketaddress->sin_port || recvfromaddress.sin_family != remotesocketaddress->sin_family || recvfromaddress.sin_addr.S_un.S_addr != remotesocketaddress->sin_addr.S_un.S_addr || recvfromaddress.sin_port != remotesocketaddress->sin_port)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="keywordflow">return</span> -1;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordflow">return</span> 0;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keyword">static</span> <span class="keywordtype">void</span> CloseUDPSocketPair(SOCKET *socketpair)
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 <span class="keywordtype">int</span> i = WSAGetLastError();
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">if</span>(socketpair[0] != INVALID_SOCKET)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 closesocket(socketpair[0]);
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117 <span class="keywordflow">if</span>(socketpair[1] != INVALID_SOCKET)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 closesocket(socketpair[1]);
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">/*</span>
<a name="l00124"></a>00124 <span class="comment"> Windows unnamed pipe emulation, used to enable select()</span>
<a name="l00125"></a>00125 <span class="comment"> on a Windows machine for the CALLBACK (pipe-based) transport domain.</span>
<a name="l00126"></a>00126 <span class="comment">*/</span>
<a name="l00127"></a>00127 <span class="keywordtype">int</span> create_winpipe_transport(<span class="keywordtype">int</span> *pipefds)
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 SOCKET socketpair[2];
<a name="l00130"></a>00130 <span class="keyword">struct </span>sockaddr_in socketaddress[2];
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keyword">struct </span>timeval waittime = {0, 200000};
<a name="l00133"></a>00133 fd_set readset;
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (InitUPDSocket(&socketpair[0], &socketaddress[0]))
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 CloseUDPSocketPair(socketpair);
<a name="l00138"></a>00138 <span class="keywordflow">return</span> -1;
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140 <span class="keywordflow">if</span> (InitUPDSocket(&socketpair[1], &socketaddress[1]))
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142 CloseUDPSocketPair(socketpair);
<a name="l00143"></a>00143 <span class="keywordflow">return</span> -1;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">/*</span>
<a name="l00147"></a>00147 <span class="comment"> I have two UDP sockets - now lets connect them to each other.</span>
<a name="l00148"></a>00148 <span class="comment"> */</span>
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (ConnectUDPSocket(&socketpair[0], &socketaddress[0], &socketpair[1]))
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 CloseUDPSocketPair(socketpair);
<a name="l00153"></a>00153 <span class="keywordflow">return</span> -1;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 <span class="keywordflow">if</span>(ConnectUDPSocket(&socketpair[1], &socketaddress[1], &socketpair[0]))
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157 CloseUDPSocketPair(socketpair);
<a name="l00158"></a>00158 <span class="keywordflow">return</span> -1;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160
<a name="l00161"></a>00161 <span class="comment">/*</span>
<a name="l00162"></a>00162 <span class="comment"> The two sockets are connected to each other, now lets test the connection</span>
<a name="l00163"></a>00163 <span class="comment"> by sending the own port number.</span>
<a name="l00164"></a>00164 <span class="comment"> */</span>
<a name="l00165"></a>00165 <span class="keywordflow">if</span>(TestUDPSend(&socketpair[0], &socketaddress[0]))
<a name="l00166"></a>00166 {
<a name="l00167"></a>00167 CloseUDPSocketPair(socketpair);
<a name="l00168"></a>00168 <span class="keywordflow">return</span> -1;
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 <span class="keywordflow">if</span>(TestUDPSend(&socketpair[1], &socketaddress[1]))
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 CloseUDPSocketPair(socketpair);
<a name="l00173"></a>00173 <span class="keywordflow">return</span> -1;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="comment">/*</span>
<a name="l00177"></a>00177 <span class="comment"> Port numbers sent, now lets select() on the socketpair and check that </span>
<a name="l00178"></a>00178 <span class="comment"> both messages got through</span>
<a name="l00179"></a>00179 <span class="comment"> */</span>
<a name="l00180"></a>00180 FD_ZERO(&readset);
<a name="l00181"></a>00181 FD_SET(socketpair[0], &readset);
<a name="l00182"></a>00182 FD_SET(socketpair[1], &readset);
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="comment">/*</span>
<a name="l00185"></a>00185 <span class="comment"> For some unknown reason the timeout setting in the select call does not have</span>
<a name="l00186"></a>00186 <span class="comment"> the desired effect, and for yet another unknown reason a Sleep(1) solves this</span>
<a name="l00187"></a>00187 <span class="comment"> problem.</span>
<a name="l00188"></a>00188 <span class="comment"> */</span>
<a name="l00189"></a>00189 Sleep(1);
<a name="l00190"></a>00190 <span class="keywordflow">if</span>(select(0, &readset, NULL, NULL, &waittime) != 2 || !FD_ISSET(socketpair[0], &readset) || !FD_ISSET(socketpair[1], &readset))
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 CloseUDPSocketPair(socketpair);
<a name="l00193"></a>00193 <span class="keywordflow">return</span> -1;
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="comment">/*</span>
<a name="l00197"></a>00197 <span class="comment"> Check if the packets I receive were really sent by me, and nobody else</span>
<a name="l00198"></a>00198 <span class="comment"> tried to sneak.</span>
<a name="l00199"></a>00199 <span class="comment"> */</span>
<a name="l00200"></a>00200 <span class="keywordflow">if</span>(TestUDPReceive(&socketpair[0], &socketpair[1], &socketaddress[1]))
<a name="l00201"></a>00201 {
<a name="l00202"></a>00202 CloseUDPSocketPair(socketpair);
<a name="l00203"></a>00203 <span class="keywordflow">return</span> -1;
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 <span class="keywordflow">if</span>(TestUDPReceive(&socketpair[1], &socketpair[0], &socketaddress[0]))
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 CloseUDPSocketPair(socketpair);
<a name="l00208"></a>00208 <span class="keywordflow">return</span> -1;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="comment">/*</span>
<a name="l00212"></a>00212 <span class="comment"> All sanity checks passed, I can return a "UDP pipe"</span>
<a name="l00213"></a>00213 <span class="comment"> */</span>
<a name="l00214"></a>00214 pipefds[0] = (int) socketpair[0];
<a name="l00215"></a>00215 pipefds[1] = (int) socketpair[1];
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keywordflow">return</span> 0;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="preprocessor">#endif </span><span class="comment">/* WIN32 */</span>
<a name="l00221"></a>00221
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