https://forge.codesys.com/forge/talk/CODESYS-V2/thread/506a77cb8c/2020-02-27T21:04:46.358000ZRecent posts to Force (UN)BIND with sockets - Any solution V2.32020-02-27T21:04:46.358000Z2020-02-27T21:04:46.358000ZAndreazhttps://forge.codesys.com/u/andreaz/https://forge.codesys.comf63a55d9b661e21dbf55a2b599feba2d1ed04ce6

<div class="markdown_content"><p>You'll have to use the system events for that, more specific the SysCallbackRegister function from SysLibCallback.lib:</p> <p>Reguster the callbacks like this (once in the program)</p> <div class="codehilite"><pre><span></span><span class="k">IF</span> <span class="nv">Init</span> <span class="k">THEN</span>    <span class="nv">SysCallbackRegister</span><span class="ss">(</span><span class="nv">INDEXOF</span><span class="ss">(</span><span class="nv">NetVarClient_Callback</span><span class="ss">)</span>, <span class="nv">EVENT_STOP</span><span class="ss">)</span><span class="c1">;</span>    <span class="nv">SysCallbackRegister</span><span class="ss">(</span><span class="nv">INDEXOF</span><span class="ss">(</span><span class="nv">NetVarClient_Callback</span><span class="ss">)</span>, <span class="nv">EVENT_BEFORE_RESET</span><span class="ss">)</span><span class="c1">;</span>    <span class="nv">SysCallbackRegister</span><span class="ss">(</span><span class="nv">INDEXOF</span><span class="ss">(</span><span class="nv">NetVarClient_Callback</span><span class="ss">)</span>, <span class="nv">EVENT_BEFORE_DOWNLOAD</span><span class="ss">)</span><span class="c1">;</span>    <span class="nv">Init</span>:<span class="o">=</span> <span class="nv">FALSE</span><span class="c1">;</span> <span class="nv">END_IF</span><span class="c1">;</span> </pre></div> <p>Then close the sockets in the function callback</p> <div class="codehilite"><pre><span></span><span class="k">FUNCTION</span> <span class="n">NetVarClient_Callback</span><span class="p">:</span><span class="n">BYTE</span> <span class="n">VAR_INPUT</span> <span class="err"> </span> <span class="err"> </span><span class="n">dwEvent</span><span class="err"> </span> <span class="err">  </span> <span class="err">  </span> <span class="err"> </span><span class="p">:</span> <span class="n">DWORD</span><span class="p">;</span> <span class="err"> </span> <span class="err"> </span><span class="n">dwFilter</span><span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="p">:</span> <span class="n">DWORD</span><span class="p">;</span> <span class="err"> </span> <span class="err"> </span><span class="n">dwOwner</span><span class="err"> </span> <span class="err">  </span> <span class="err">  </span> <span class="err"> </span><span class="p">:</span> <span class="n">DWORD</span><span class="p">;</span> <span class="n">END_VAR</span> <span class="p">(</span><span class="o">*</span> <span class="k">Close</span> <span class="n">the</span> <span class="n">socket</span> <span class="o">*</span><span class="p">)</span> <span class="n">NetVarClient</span><span class="p">.</span><span class="k">Close</span><span class="p">();</span> </pre></div> <p>After this the socket will be closed when you do a reset or download or stop.</p> <p>(You can open the NetVarUdp_LIB_V23.lib library to see it in action)</p></div>

2020-02-27T21:04:44.921000Z2020-02-27T21:04:44.921000ZPJEhttps://forge.codesys.com/u/pje/https://forge.codesys.com1c02a972902a8607b7287674a36fee9ca51a475d

<div class="markdown_content"><p>I'm having a small issue with rebinding to a port if I do a clean. I understand the software is keeping the socket open with the previous socket identifier, but locks out the new bind request.</p> <p>Is there an easy way to fix this on V2.3?</p> <p>Regards,</p> <p>PJE</p></div>