php代码
<!-- PHP Subnet Calculator v1.3. Copyright 06/25/2003 Raymond Ferguson ferguson_at_share-foo.com. Released under GNU GPL. Special thanks to krischan at jodies.cx for ipcalc.pl http://jodies.de/ipcalcThe presentation and concept was mostly taken from ipcalc.pl. --> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>PHP Subnet Calculator</title> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta name="GENERATOR" content="Quanta Plus"> </head> <body bgcolor="#D3D3D3"> <center> <form method="post" action="<?php print $_SERVER['PHP_SELF'] ?> "> <BR><BR> <table width="95%" align=center cellpadding=2 cellspacing=2 border=0> <tr><td align="center" bgcolor="#999999"> <b><A HREF="http://sourceforge.net/projects/subntcalc/">PHP Subnet Calculator</A></b> </td></tr> </table> <BR> <table> <tr> <td>IP & Mask or CIDR: </td> <td><input type="text" name="my_net_info" value="" size="31" maxlength="32"></td> <td> <input type="submit" value="Calculate" name="subnetcalc"> </td> </tr> </table></form><br> <?php //Start table print "<table cellpadding=\"2\">\n<COL span=\"4\" align=\"left\">\n" ; $end='</table><br><br><br><br><br><table width="95%" align=center cellpadding=2 cellspacing=2 border=0> <tr><td bgcolor="#999999"></td><tr><td align="center"><a href="http://validator.w3.org/check/referer"> <img border="0" src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" height="31" width="88"></a> </td></tr></table></center></body></html>'; if (empty($_POST['my_net_info'])){ tr('Use IP & CIDR Netmask: ', '10.0.0.1/22'); tr('Or IP & Netmask:','10.0.0.1 255.255.252.0'); tr('Or IP & Wildcard Mask:','10.0.0.1 0.0.3.255'); print $end ; exit ; } $my_net_info=rtrim($_POST['my_net_info']); //if (! ereg('^([0-9]{1,3}\.){3}[0-9]{1,3}(( ([0-9]{1,3}\.){3}[0-9]{1,3})|(/[0-9]{1,2}))$',$my_net_info)){ if (! preg_match("/^([0-9]{1,3}\.){3}[0-9]{1,3}(( ([0-9]{1,3}\.){3}[0-9]{1,3})|(\/[0-9]{1,2}))$/",$my_net_info)){ tr("Invalid Input."); tr('Use IP & CIDR Netmask: ', '10.0.0.1/22'); tr('Or IP & Netmask:','10.0.0.1 255.255.252.0'); tr('Or IP & Wildcard Mask:','10.0.0.1 0.0.3.255'); print $end ; exit ; } //if (ereg("/",$my_net_info)){ //if cidr type mask if (preg_match("/\//",$my_net_info)){ //if cidr type mask $dq_host = strtok("$my_net_info", "/"); $cdr_nmask = strtok("/"); if (!($cdr_nmask >= 0 && $cdr_nmask <= 32)){ tr("Invalid CIDR value. Try an integer 0 - 32."); print "$end"; exit ; } $bin_nmask=cdrtobin($cdr_nmask); $bin_wmask=binnmtowm($bin_nmask); } else { //Dotted quad mask? $dqs=explode(" ", $my_net_info); $dq_host=$dqs[0]; $bin_nmask=dqtobin($dqs[1]); $bin_wmask=binnmtowm($bin_nmask); //if (ereg("0",rtrim($bin_nmask, "0"))) { //Wildcard mask then? hmm? if (preg_match("/0/",rtrim($bin_nmask, "0"))) { //Wildcard mask then? hmm? $bin_wmask=dqtobin($dqs[1]); $bin_nmask=binwmtonm($bin_wmask); if (ereg("0",rtrim($bin_nmask, "0"))){ //If it's not wcard, whussup? tr("Invalid Netmask."); print "$end"; exit ; } } $cdr_nmask=bintocdr($bin_nmask); } //Check for valid $dq_host //if(! ereg('^0.',$dq_host)){ if(! preg_match("/^0\./",$dq_host)){ foreach( explode(".",$dq_host) as $octet ){ if($octet > 255){ tr("Invalid IP Address"); print $end ; exit; } } } $bin_host=dqtobin($dq_host); $bin_bcast=(str_pad(substr($bin_host,0,$cdr_nmask),32,1)); $bin_net=(str_pad(substr($bin_host,0,$cdr_nmask),32,0)); $bin_first=(str_pad(substr($bin_net,0,31),32,1)); $bin_last=(str_pad(substr($bin_bcast,0,31),32,0)); $host_total=(bindec(str_pad("",(32-$cdr_nmask),1)) - 1); if ($host_total <= 0){ //Takes care of 31 and 32 bit masks. $bin_first="N/A" ; $bin_last="N/A" ; $host_total="N/A"; if ($bin_net === $bin_bcast) $bin_bcast="N/A"; } //Determine Class //if (ereg('^0',$bin_net)){ if (preg_match("/^0/",$bin_net)){ $class="A"; $dotbin_net= "<font color=\"Green\">0</font>" . substr(dotbin($bin_net,$cdr_nmask),1) ; //}elseif (ereg('^10',$bin_net)){ }elseif (preg_match("/^10/",$bin_net)){ $class="B"; $dotbin_net= "<font color=\"Green\">10</font>" . substr(dotbin($bin_net,$cdr_nmask),2) ; //}elseif (ereg('^110',$bin_net)){ }elseif (preg_match("/^110/",$bin_net)){ $class="C"; $dotbin_net= "<font color=\"Green\">110</font>" . substr(dotbin($bin_net,$cdr_nmask),3) ; //}elseif (ereg('^1110',$bin_net)){ }elseif (preg_match("/^1110/",$bin_net)){ $class="D"; $dotbin_net= "<font color=\"Green\">1110</font>" . substr(dotbin($bin_net,$cdr_nmask),4) ; $special="<font color=\"Green\">Class D = Multicast Address Space.</font>"; }else{ $class="E"; $dotbin_net= "<font color=\"Green\">1111</font>" . substr(dotbin($bin_net,$cdr_nmask),4) ; $special="<font color=\"Green\">Class E = Experimental Address Space.</font>"; } //if (ereg('^(00001010)|(101011000001)|(1100000010101000)',$bin_net)){ if (preg_match("/^(00001010)|(101011000001)|(1100000010101000)/",$bin_net)){ $special='<a href="http://www.ietf.org/rfc/rfc1918.txt">( RFC-1918 Private Internet Address. )</a>'; } // Print Results tr('Address:',"<font color=\"blue\">$dq_host</font>", '<font color="brown">'.dotbin($bin_host,$cdr_nmask).'</font>'); tr('Netmask:','<font color="blue">'.bintodq($bin_nmask)." = $cdr_nmask</font>", '<font color="red">'.dotbin($bin_nmask, $cdr_nmask).'</font>'); tr('Wildcard:', '<font color="blue">'.bintodq($bin_wmask).'</font>', '<font color="brown">'.dotbin($bin_wmask, $cdr_nmask).'</font>'); tr('Network:', '<font color="blue">'.bintodq($bin_net).'</font>', "<font color=\"brown\">$dotbin_net</font>","<font color=\"Green\">(Class $class)</font>"); tr('Broadcast:','<font color="blue">'.bintodq($bin_bcast).'</font>', '<font color="brown">'.dotbin($bin_bcast, $cdr_nmask).'</font>'); tr('HostMin:', '<font color="blue">'.bintodq($bin_first).'</font>', '<font color="brown">'.dotbin($bin_first, $cdr_nmask).'</font>'); tr('HostMax:', '<font color="blue">'.bintodq($bin_last).'</font>', '<font color="brown">'.dotbin($bin_last, $cdr_nmask).'</font>'); @tr('Hosts/Net:', '<font color="blue">'.$host_total.'</font>', "$special"); print "$end"; function binnmtowm($binin){ $binin=rtrim($binin, "0"); //if (!ereg("0",$binin) ){ if (!preg_match("/0/",$binin) ){ return str_pad(str_replace("1","0",$binin), 32, "1"); } else return "1010101010101010101010101010101010101010"; } function bintocdr ($binin){ return strlen(rtrim($binin,"0")); } function bintodq ($binin) { if ($binin=="N/A") return $binin; $binin=explode(".", chunk_split($binin,8,".")); for ($i=0; $i<4 ; $i++) { $dq[$i]=bindec($binin[$i]); } return implode(".",$dq) ; } function bintoint ($binin){ return bindec($binin); } function binwmtonm($binin){ $binin=rtrim($binin, "1"); //if (!ereg("1",$binin)){ if (!preg_match("/1/",$binin)){ return str_pad(str_replace("0","1",$binin), 32, "0"); } else return "1010101010101010101010101010101010101010"; } function cdrtobin ($cdrin){ return str_pad(str_pad("", $cdrin, "1"), 32, "0"); } function dotbin($binin,$cdr_nmask){ // splits 32 bit bin into dotted bin octets if ($binin=="N/A") return $binin; $oct=rtrim(chunk_split($binin,8,"."),"."); if ($cdr_nmask > 0){ $offset=sprintf("%u",$cdr_nmask/8) + $cdr_nmask ; return substr($oct,0,$offset ) . " " . substr($oct,$offset) ; } else { return $oct; } } function dqtobin($dqin) { $dq = explode(".",$dqin); for ($i=0; $i<4 ; $i++) { $bin[$i]=str_pad(decbin($dq[$i]), 8, "0", STR_PAD_LEFT); } return implode("",$bin); } function inttobin ($intin) { return str_pad(decbin($intin), 32, "0", STR_PAD_LEFT); } function tr(){ echo "\t<tr>"; for($i=0; $i<func_num_args(); $i++) echo "<td>".func_get_arg($i)."</td>"; echo "</tr>\n"; } ?>

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