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Sample_PHP tutorial on using fork and socket on php

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Jul 13, 2016 pm 05:36 PM

forkphpsocketsuperioruseexistofmeet

最近剛好遇到一個頭大的問題寫了這個code讓大家參考一下吧
家裏的無線AP功能不太好，他只提供把外部真實IP map 到 Nat裡面的某個IP
不能指定某個port map到某個內部IP的Port
可是我已經把外部的IP Map到內部的Linux);" href="javascript:;" target=_self>Linux Server上，
但是我又想從外部使用VNC連到內部的一台Windows電腦。
所以就寫了這個程式
原理是這樣

這個程式會在Linux Server上開一個Port作Listen的動作
當外部連到這個Port時，程式會再開啟另一個連線連到內部Windows的VNC上
把外部的封包原封不動的丟到VNC的連線上，然後把VNC連線傳回的資料原封不動的再丟回外部的Port

程式碼:

<br><font face="NSimsun">#!/usr/bin/php -q<br></font><font color="#000000"><font face="NSimsun"><font color="#0000bb"><?php <BR> $IP</font><font color="#007700">=</font><font color="#dd0000">192.168.1.1</font><font color="#007700">;</font></font><font face="NSimsun"><font color="#ff8000">//Windows電腦的IP<br> </font><font color="#0000bb">$Port</font><font color="#007700">=</font><font color="#dd0000">5900</font><font color="#007700">;        </font></font><font face="NSimsun"><font color="#ff8000">//VNC使用的Port<br> </font><font color="#0000bb">$ServerPort</font><font color="#007700">=</font><font color="#dd0000">9999</font><font color="#007700">;</font></font><font face="NSimsun"><font color="#ff8000">//Linux Server對外使用的Port<br> </font><font color="#0000bb">$RemoteSocket</font><font color="#007700">=</font><font color="#0000bb">false</font><font color="#007700">;</font></font><font face="NSimsun"><font color="#ff8000">//連線到VNC的Socket<br> </font><font color="#007700">function</font><font color="#0000bb">SignalFunction</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;$Signal)<br> </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#123;<br>   //這是主Process的訊息處理函數<br>  </font><font color="#007700">global</font><font color="#0000bb">$PID</font><font color="#007700">;</font></font><font face="NSimsun"><font color="#ff8000">//Child Process的PID<br>  </font><font color="#007700">switch &</font></font><font face="NSimsun"><font color="#ff8000">#40;$Signal)<br>  </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#123;<br>   </font><font color="#007700">case</font><font color="#0000bb">SIGTRAP</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br>   </font><font color="#007700">case</font><font color="#0000bb">SIGTERM</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br>    //收到結束程式的Signal<br>    </font><font color="#007700">if&</font></font><font face="NSimsun"><font color="#ff8000">#40;$PID)<br>    </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#123;<br>     //送一個SIGTERM的訊號給Child告訴他趕快結束掉嘍<br>     </font><font color="#0000bb">posix_kill</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;$PID,SIGTERM);<br>     //等待Child Process結束，避免zombie<br>     </font><font color="#0000bb">pcntl_wait</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;$Status);<br>    </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#125;<br>    //關閉主Process開啟的Socket<br>    </font><font color="#0000bb">DestroySocket</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;);<br>    </font><font color="#007700">exit&</font></font><font face="NSimsun" color="#ff8000">#40;0); //結束主Process<br>    </font><font face="NSimsun"><font color="#007700">break;<br>   case</font><font color="#0000bb">SIGCHLD</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br>    /*<br>當Child Process結束掉時，Child會送一個SIGCHLD訊號給Parrent<br>當Parrent收到SIGCHLD，就知道Child Process已經結束嘍 ，該做一些<br>結束的動作*/<br>    </font><font color="#007700">unset&</font></font><font face="NSimsun"><font color="#ff8000">#40;$PID); //將$PID清空，表示Child Process已經結束<br>    </font><font color="#0000bb">pcntl_wait</font><font color="#007700">&</font></font><font face="NSimsun" color="#ff8000">#40;$Status); //避免Zombie<br>    </font><font face="NSimsun" color="#007700">break;<br>   default&</font><font face="NSimsun"><font color="#ff8000">#58;<br>  </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#125;<br> </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#125;<br> </font><font color="#007700">function</font><font color="#0000bb">ChildSignalFunction</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;$Signal)<br> </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#123;<br>//This is the message processing function of Child Process <br> </font><font color="#007700">switch &</font></font><font face="NSimsun"><font color="#ff8000">#40;$Signal)<br> </font><font color="#007700"> &</font></font><font face="NSimsun"><font color="#ff8000">#123;<br> </font><font color="#007700">case</font><font color="#0000bb">SIGTRAP</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br> </font><font color="#007700">case</font><font color="#0000bb">SIGTERM</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br>//Child Process received the end message<br> </font><font color="#0000bb">DestroySocket</font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#40;); //Close Socket<br> </font><font color="#007700">exit&</font></font><font face="NSimsun"><font color="#ff8000">#40;0); //End Child Process<br> </font><font color="#007700">default&</font></font><font face="NSimsun"><font color="#ff8000">#58;<br> </font><font color="#007700">&</font></font><font face="NSimsun"><font color="#ff8000">#125;<br> ></font>}<font color="#007700"> ;</font> </font><font face="NSimsun">&<font color="#ff8000"><br></font><font color="#007700">#123;</font> //Child Process Socket processing function<font color="#0000bb"> //$ConnectedServerSocket -> Externally connected Socket</font> <font color="#007700"></font>global</font><font face="NSimsun">$ServerSocket<font color="#ff8000"><br>,</font><font color="#007700">$RemoteSocket</font></font>,<font face="NSimsun"><font color="#ff8000">$IP<br><br>,<br></font>$Port<font color="#007700"></font><font color="#0000bb"></font>;<font color="#007700"> >$ConnectedServerSocket</font><font color="#0000bb"></font>;<font color="#007700"> declare </font>
<font color="#0000bb"></font><font color="#007700">http://www.bkjia.com/PHPjc/508267.html</font><font color="#0000bb">www.bkjia.com</font></font>true<font face="NSimsun"><font color="#007700">http: //www.bkjia.com/PHPjc/508267.html<br></font>TechArticle<font color="#0000bb"></font>I just encountered a big problem recently and wrote this code for your reference. Does the wireless AP function at home work? Great, it only provides mapping of the external real IP to a certain IP in Nat. It cannot refer to...<font color="#007700"></font><font color="#0000bb"></font>
</font><font face="NSimsun" color="#007700"></font></font>

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