Добавлен прототип библиотеки DHCP

diff --git a/dhcplib.php b/dhcplib.php
new file mode 100644 (file)
index 0000000..5c86432
--- /dev/null
+++ b/dhcplib.php
@@ -0,0 +1,142 @@
+<?php
+$dhcp = new dhcp_proto(); 
+$socket = stream_socket_server("udp://0.0.0.0:67", $errno, $errstr, STREAM_SERVER_BIND);
+if (!$socket) {
+    die("$errstr ($errno)");
+}
+
+do {
+    $pkt = stream_socket_recvfrom($socket, 1500, 0, $peer);
+    echo "$peer: \n";
+    $dhcp->parse($pkt);
+    exit();
+} while ($pkt !== false);
+
+class dhcp_proto
+{
+
+    public function parse($packet)
+    {
+       $parse = unpack('Cop/Chtype/Chlen/Chops/Ixid/nsecs/nflags/Iciaddr/Iyiaddr/Isiaddr/Igiaddr/H32chaddr/Z64sname/Z128file/H8magic/a*options',$packet);
+       var_dump($parse);
+       $opt_stack = $parse['options'];
+       $OPTS = [];
+       $stopflag = FALSE;
+       $DHCPOptions = [];
+       do
+       {
+           $optnum = unpack('C', $opt_stack);
+           if ($optnum[1] == 255)
+           {
+               break;
+           }
+           if ($optnum[1] == 0)
+           {
+               continue;
+           }
+           $opt_stack = substr($opt_stack, 1);
+           $optsize = unpack('C', $opt_stack);
+           $opt_stack = substr($opt_stack, 1);     
+           $optpayload = unpack('a'.$optsize[1], $opt_stack);
+           $opt_stack = substr($opt_stack, $optsize[1]);
+           var_dump($optnum[1], $optpayload[1]);
+           $DHCPOptions[] = $this->OptDictonaryPostprocessor($optnum[1], $optpayload[1]);
+       }
+       while (strlen($opt_stack) > 0);
+               
+       var_dump($DHCPOptions);
+    }
+    protected function OptDictonaryPostprocessor($opt,$payload)
+    {
+       switch ($opt)
+       {
+           case 1:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'SubnetMask';
+               $tmp = long2ip(unpack('N',$payload));
+               $DecodedOption['data'] = $tmp[1];
+               break;
+           case 12:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'HostName';
+               $DecodedOption['data'] = $payload;
+               break;
+
+           case 53:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'DhcpPacketType';
+               $type = unpack('C',$payload);
+               switch ($type[1])
+               {
+                   case 1:
+                   {    
+                       $DecodedOption['data'] = 'DHCPDISCOVER';
+                       break;
+                   }
+                   case 2:
+                   {    
+                       $DecodedOption['data'] = 'DHCPOFFER';
+                       break;
+                   }
+                   case 3:
+                   {    
+                       $DecodedOption['data'] = 'DHCPREQUEST';
+                       break;
+                   }
+                   case 4:
+                   {    
+                       $DecodedOption['data'] = 'DHCPDECLINE';
+                       break;
+                   }
+                   case 5:
+                   {    
+                       $DecodedOption['data'] = 'DHCPACK';
+                       break;
+                   }
+                   case 6:
+                   {    
+                       $DecodedOption['data'] = 'DHCPNAK';
+                       break;
+                   }
+                   case 7:
+                   {    
+                       $DecodedOption['data'] = 'DHCPRELEASE';
+                       break;
+                   }
+                   case 8:
+                   {    
+                       $DecodedOption['data'] = 'DHCPINFORM';
+                       break;
+                   }
+                   case 9:
+                   {    
+                       $DecodedOption['data'] = 'RESERVED';
+                       break;
+                   }
+                   case 0:
+                   {    
+                       $DecodedOption['data'] = 'RESERVED';
+                       break;
+                   }
+               }
+               break;
+           case 55:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'RequestOptionCodes';
+               $DecodedOption['data'] = unpack('C*',$payload);
+               break;
+           case 61:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'ClientIdentifier';
+               $tmp = unpack('H*',$payload);
+               $DecodedOption['data'] = $tmp[1];
+               break;
+           default:
+               $DecodedOption['number'] = $opt;
+               $DecodedOption['name'] = 'UnsupportedOption';
+               $DecodedOption['data'] = FALSE;
+               break;
+       }
+       return $DecodedOption;
+    }
+}
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