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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>/opentcp/udp.c Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.2.18 --><center><a class="qindex" href="main.html">Main Page</a> <a class="qindex" href="modules.html">Modules</a> <a class="qindex" href="annotated.html">Data Structures</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Data Fields</a> <a class="qindex" href="globals.html">Globals</a> <a class="qindex" href="pages.html">Related Pages</a> <a class="qindex" href="examples.html">Examples</a> </center><hr><h1>/opentcp/udp.c</h1><a href="udp_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="comment">/*</span>00002 <span class="comment"> *Copyright (c) 2000-2002 Viola Systems Ltd.</span>00003 <span class="comment"> *All rights reserved.</span>00004 <span class="comment"> *</span>00005 <span class="comment"> *Redistribution and use in source and binary forms, with or without </span>00006 <span class="comment"> *modification, are permitted provided that the following conditions </span>00007 <span class="comment"> *are met:</span>00008 <span class="comment"> *</span>00009 <span class="comment"> *1. Redistributions of source code must retain the above copyright </span>00010 <span class="comment"> *notice, this list of conditions and the following disclaimer.</span>00011 <span class="comment"> *</span>00012 <span class="comment"> *2. Redistributions in binary form must reproduce the above copyright </span>00013 <span class="comment"> *notice, this list of conditions and the following disclaimer in the </span>00014 <span class="comment"> *documentation and/or other materials provided with the distribution.</span>00015 <span class="comment"> *</span>00016 <span class="comment"> *3. The end-user documentation included with the redistribution, if </span>00017 <span class="comment"> *any, must include the following acknowledgment:</span>00018 <span class="comment"> * "This product includes software developed by Viola </span>00019 <span class="comment"> * Systems (http://www.violasystems.com/)."</span>00020 <span class="comment"> *</span>00021 <span class="comment"> *Alternately, this acknowledgment may appear in the software itself, </span>00022 <span class="comment"> *if and wherever such third-party acknowledgments normally appear.</span>00023 <span class="comment"> *</span>00024 <span class="comment"> *4. The names "OpenTCP" and "Viola Systems" must not be used to </span>00025 <span class="comment"> *endorse or promote products derived from this software without prior </span>00026 <span class="comment"> *written permission. For written permission, please contact </span>00027 <span class="comment"> *opentcp@opentcp.org.</span>00028 <span class="comment"> *</span>00029 <span class="comment"> *5. Products derived from this software may not be called "OpenTCP", </span>00030 <span class="comment"> *nor may "OpenTCP" appear in their name, without prior written </span>00031 <span class="comment"> *permission of the Viola Systems Ltd.</span>00032 <span class="comment"> *</span>00033 <span class="comment"> *THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED </span>00034 <span class="comment"> *WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF </span>00035 <span class="comment"> *MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. </span>00036 <span class="comment"> *IN NO EVENT SHALL VIOLA SYSTEMS LTD. OR ITS CONTRIBUTORS BE LIABLE </span>00037 <span class="comment"> *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR </span>00038 <span class="comment"> *CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF </span>00039 <span class="comment"> *SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR </span>00040 <span class="comment"> *BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, </span>00041 <span class="comment"> *WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE </span>00042 <span class="comment"> *OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, </span>00043 <span class="comment"> *EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>00044 <span class="comment"> *====================================================================</span>00045 <span class="comment"> *</span>00046 <span class="comment"> *OpenTCP is the unified open source TCP/IP stack available on a series </span>00047 <span class="comment"> *of 8/16-bit microcontrollers, please see <http://www.opentcp.org>.</span>00048 <span class="comment"> *</span>00049 <span class="comment"> *For more information on how to network-enable your devices, or how to </span>00050 <span class="comment"> *obtain commercial technical support for OpenTCP, please see </span>00051 <span class="comment"> *<http://www.violasystems.com/>.</span>00052 <span class="comment"> */</span>00053 00077 <span class="preprocessor">#include <<a class="code" href="debug_8h.html">inet/debug.h</a>></span>00078 <span class="preprocessor">#include <<a class="code" href="datatypes_8h.html">inet/datatypes.h</a>></span>00079 <span class="preprocessor">#include <<a class="code" href="ethernet_8h.html">inet/ethernet.h</a>></span>00080 <span class="preprocessor">#include <<a class="code" href="ip_8h.html">inet/ip.h</a>></span>00081 <span class="preprocessor">#include <<a class="code" href="tcp__ip_8h.html">inet/tcp_ip.h</a>></span>00082 <span class="preprocessor">#include <<a class="code" href="system_8h.html">inet/system.h</a>></span>00083 <a name="l00094"></a><a class="code" href="udp_8c.html#a0">00094</a> <span class="keyword">struct </span><a class="code" href="structucb.html">ucb</a> udp_socket[NO_OF_UDPSOCKETS];00095 <a name="l00101"></a><a class="code" href="udp_8c.html#a1">00101</a> <span class="keyword">struct </span><a class="code" href="structudp__frame.html">udp_frame</a> received_udp_packet;00102 <a name="l00118"></a><a class="code" href="udp_8c.html#a2">00118</a> INT8 <a class="code" href="group__core__initializer.html#a4">udp_init</a> (<span class="keywordtype">void</span>)00119 {00120 UINT8 i;00121 <span class="keyword">struct </span><a class="code" href="structucb.html">ucb</a>* soc;00122 00123 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS < 0 )00124 <span class="keywordflow">return</span>(-1);00125 00126 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS == 0 )00127 <span class="keywordflow">return</span>(0);00128 00129 UDP_DEBUGOUT(<span class="stringliteral">"Initializing UDP"</span>);00130 00131 <span class="keywordflow">for</span>(i=0; i < NO_OF_UDPSOCKETS; i++) {00132 soc = &udp_socket[i]; <span class="comment">/* Get Socket */</span>00133 00134 soc-><a class="code" href="structucb.html#m0">state</a> = <a class="code" href="tcp__ip_8h.html#a28">UDP_STATE_FREE</a>;00135 soc-><a class="code" href="structucb.html#m1">tos</a> = 0;00136 soc-><a class="code" href="structucb.html#m2">locport</a> = 0;00137 soc-><a class="code" href="structucb.html#m3">opts</a> = <a class="code" href="tcp__ip_8h.html#a5">UDP_OPT_SEND_CS</a> | <a class="code" href="tcp__ip_8h.html#a6">UDP_OPT_CHECK_CS</a>; 00138 soc->event_listener = 0;00139 00140 UDP_DEBUGOUT(<span class="stringliteral">"."</span>);00141 00142 }00143 00144 UDP_DEBUGOUT(<span class="stringliteral">"\n\rUDP Initialized\n\r"</span>);00145 00146 <span class="comment">/* Return number of sockets initialized */</span>00147 00148 <span class="keywordflow">return</span>(i+1);00149 00150 }00151 <a name="l00175"></a><a class="code" href="udp_8c.html#a3">00175</a> INT8 <a class="code" href="udp_8c.html#a3">udp_getsocket</a> (UINT8 tos, INT32 (*listener)(INT8, UINT8, UINT32, UINT16, UINT16, UINT16), UINT8 opts )00176 {00177 INT8 i;00178 <span class="keyword">struct </span><a class="code" href="structucb.html">ucb</a>* soc;00179 00180 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS < 0 )00181 <span class="keywordflow">return</span>(-1);00182 00183 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS == 0 )00184 <span class="keywordflow">return</span>(-1);00185 00186 00187 <span class="keywordflow">if</span>(listener == 0) {00188 UDP_DEBUGOUT(<span class="stringliteral">"ERROR:Event listener function for UDP not specified\r\n"</span>);00189 <span class="keywordflow">return</span>(-1);00190 }00191 00192 UDP_DEBUGOUT(<span class="stringliteral">"Searching for free UDP socket...\r\n"</span>);00193 00194 <span class="keywordflow">for</span>(i=0; i < NO_OF_UDPSOCKETS; i++) {00195 soc = &udp_socket[i]; <span class="comment">/* Get Socket */</span>00196 00197 <span class="keywordflow">if</span>(soc-><a class="code" href="structucb.html#m0">state</a> == <a class="code" href="tcp__ip_8h.html#a28">UDP_STATE_FREE</a>) {00198 <span class="comment">/* We found it */</span>00199 00200 UDP_DEBUGOUT(<span class="stringliteral">"Free socket found\r\n"</span>);00201 00202 soc-><a class="code" href="structucb.html#m0">state</a> = <a class="code" href="tcp__ip_8h.html#a29">UDP_STATE_CLOSED</a>;00203 soc-><a class="code" href="structucb.html#m1">tos</a> = tos;00204 soc-><a class="code" href="structucb.html#m2">locport</a> = 0;00205 00206 soc-><a class="code" href="structucb.html#m3">opts</a> = 0;00207 00208 <span class="keywordflow">if</span>(opts & <a class="code" href="tcp__ip_8h.html#a5">UDP_OPT_SEND_CS</a>)00209 soc-><a class="code" href="structucb.html#m3">opts</a> |= <a class="code" href="tcp__ip_8h.html#a5">UDP_OPT_SEND_CS</a>;00210 <span class="keywordflow">if</span>(opts & <a class="code" href="tcp__ip_8h.html#a6">UDP_OPT_CHECK_CS</a>)00211 soc-><a class="code" href="structucb.html#m3">opts</a> |= <a class="code" href="tcp__ip_8h.html#a6">UDP_OPT_CHECK_CS</a>;00212 00213 soc->event_listener = listener;00214 00215 <span class="comment">/* Return handle */</span>00216 00217 <span class="keywordflow">return</span>(i);00218 }00219 00220 }00221 00222 <span class="comment">/* We are there so no socket found */</span>00223 00224 UDP_DEBUGOUT(<span class="stringliteral">"No UDP socket found\r\n"</span>);00225 <span class="keywordflow">return</span>(-1);00226 00227 }00228 00229 <a name="l00244"></a><a class="code" href="udp_8c.html#a4">00244</a> INT8 <a class="code" href="udp_8c.html#a4">udp_releasesocket</a> (INT8 sochandle)00245 {00246 <span class="keyword">struct </span><a class="code" href="structucb.html">ucb</a>* soc;00247 00248 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS < 0 )00249 <span class="keywordflow">return</span>(-1);00250 00251 <span class="keywordflow">if</span>( NO_OF_UDPSOCKETS == 0 )00252 <span class="keywordflow">return</span>(-1);00253 00254 <span class="keywordflow">if</span>( sochandle > NO_OF_UDPSOCKETS ) {00255 UDP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);00256 <span class="keywordflow">return</span>(-1);00257 }00258 00259 <span class="keywordflow">if</span>( sochandle < 0 ) {00260 UDP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);00261 <span class="keywordflow">return</span>(-1);00262 }00263 00264 soc = &udp_socket[sochandle]; <span class="comment">/* Get referense */</span>00265 00266 soc-><a class="code" href="structucb.html#m0">state</a> = <a class="code" href="tcp__ip_8h.html#a28">UDP_STATE_FREE</a>;00267 soc-><a class="code" href="structucb.html#m1">tos</a> = 0;00268 soc-><a class="code" href="structucb.html#m2">locport</a> = 0;00269 soc-><a class="code" href="structucb.html#m3">opts</a> = <a class="code" href="tcp__ip_8h.html#a5">UDP_OPT_SEND_CS</a> | <a class="code" href="tcp__ip_8h.html#a6">UDP_OPT_CHECK_CS</a>; 00270 soc->event_listener = 0;00271 00272 <span class="keywordflow">return</span>(sochandle);00273 ⌨️ 快捷键说明
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