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/* -- (c) Aaron Schulz 2009 */
/* Every time you change this JS please bump $wgCheckUserStyleVersion in CheckUser.php */
/*
* This function calculates the common range of a list of
* IPs. It should be set to update on keyUp.
*/
function updateCIDRresult() {
var form = document.getElementById( 'mw-checkuser-cidrform' );
if( !form ) {
return; // no JS form
}
form.style.display = 'inline'; // unhide form (JS active)
var iplist = document.getElementById( 'mw-checkuser-iplist' );
if( !iplist ) {
return; // no JS form
}
var text = iplist.value;
// Each line should have one IP or range
if( text.indexOf("\n") != -1 ) {
var ips = text.split("\n");
// Try some other delimiters too
} else if( text.indexOf("\t") != -1 ) {
var ips = text.split("\t");
} else if( text.indexOf(",") != -1 ) {
var ips = text.split(",");
} else if( text.indexOf("-") != -1 ) {
var ips = text.split("-");
} else if( text.indexOf(" ") != -1 ) {
var ips = text.split(" ");
} else {
var ips = text.split(";");
}
var bin_prefix = 0;
var prefix_cidr = 0;
var prefix = new String( '' );
// Go through each IP in the list, get its binary form, and
// track the largest binary prefix among them...
for( var i = 0; i < ips.length; i++ ) {
var invalid = false;
// ...in the spirit of block.js, call this "addy"
var addy = ips[i];
// Match the first IP in each list (ignore other garbage)
var ipV4 = addy.match(/(^|\b)(\d+\.\d+\.\d+\.\d+)(\/\d+)?\b/);
var ipV6 = addy.match(/(^|\b)(:(:[0-9A-Fa-f]{1,4}){1,7}|[0-9A-Fa-f]{1,4}(:{1,2}[0-9A-Fa-f]{1,4}|::$){1,7})(\/\d+)?\b/);
// Binary form
var bin = new String( '' );
// Convert the IP to binary form: IPv4
if( ipV4 ) {
var ip = ipV4[2];
var cidr = ipV4[3]; // CIDR, if it exists
// Get each quad integer
var blocs = ip.split('.');
// IANA 1.0.0.0/8, 2.0.0.0/8
if( blocs[0] < 3 ) {
continue;
}
for( var x = 0; x < blocs.length; x++ ) {
bloc = parseInt( blocs[x], 10 );
if( bloc > 255 ) {
invalid = true; // bad IP!
break; // bad IP!
}
bin_block = bloc.toString( 2 ); // concat bin with binary form of bloc
while( bin_block.length < 8 ) {
bin_block = '0' + bin_block; // pad out as needed
}
bin += bin_block;
}
if( invalid ) {
continue; // move to next IP
}
prefix = ''; // Rebuild formatted bin_prefix for each IP
// Apply any valid CIDRs
if( cidr ) {
cidr = cidr.match( /\d+$/ )[0]; // get rid of slash
bin = bin.substring( 0, cidr ); // truncate bin
}
// Init bin_prefix
if( bin_prefix === 0 ) {
bin_prefix = new String( bin );
// Get largest common bin_prefix
} else {
for( var x = 0; x < bin_prefix.length; x++ ) {
// Bin_prefix always smaller than bin unless a CIDR was used on bin
if( bin[x] == undefined || bin_prefix[x] != bin[x] ) {
bin_prefix = bin_prefix.substring( 0, x ); // shorten bin_prefix
break;
}
}
}
// Build the IP in CIDR form
var prefix_cidr = bin_prefix.length;
// CIDR too small?
if( prefix_cidr < 16 ) {
document.getElementById( 'mw-checkuser-cidr-res' ).value = '!';
document.getElementById( 'mw-checkuser-ipnote' ).innerHTML = '>' + Math.pow( 2, 32 - prefix_cidr );
return; // too big
}
// Build the IP in dotted-quad form
for( var z = 0; z <= 3; z++ ) {
var bloc = 0;
var start = z * 8;
var end = start + 7;
for( var x = start; x <= end; x++ ) {
if( bin_prefix[x] == undefined ) {
break;
}
bloc += parseInt( bin_prefix[x], 10 ) * Math.pow( 2, end - x );
}
prefix += ( z == 3 ) ? bloc : bloc + '.';
}
// Get IPs affected
ip_count = Math.pow( 2, 32 - prefix_cidr );
// Is the CIDR meaningful?
if( prefix_cidr == 32 ) {
prefix_cidr = false;
}
// Convert the IP to binary form: IPv6
} else if( ipV6 ) {
var ip = ipV6[2];
var cidr = ipV6[0].match( /\/\d+$/ );
cidr = cidr ? cidr[0] : false;
var abbrevs = ip.match( /::/g );
if( abbrevs && abbrevs.length > 1 ) {
continue; // bad IP!
}
// Expand out "::"s
if( abbrevs && abbrevs.length > 0 ) {
var colons = ip.match( /:/g );
var needed = 7 - ( colons.length - 2 ); // 2 from "::"
var insert = '';
while( needed > 1 ) {
insert += ':0';
needed--;
}
ip = ip.replace( '::', insert + ':' );
// For IPs that start with "::", correct the final IP so that it starts with '0' and not ':'
if( ip[0] == ':' ) {
ip = '0' + ip;
}
}
// Get each hex octant
var blocs = ip.split(':');
for( var x = 0; x <= 7; x++ ) {
bloc = blocs[x] ? blocs[x] : '0';
if( bloc > 'ffff' ) {
invalid = true; // bad IP!
break; // bad IP!
}
int_block = hex2int( bloc ); // convert hex -> int
bin_block = int_block.toString( 2 ); // concat bin with binary form of bloc
while( bin_block.length < 16 ) {
bin_block = '0' + bin_block; // pad out as needed
}
bin += bin_block;
}
if( invalid ) {
continue; // move to next IP
}
prefix = ''; // Rebuild formatted bin_prefix for each IP
// Apply any valid CIDRs
if( cidr ) {
cidr = cidr.match( /\d+$/ )[0]; // get rid of slash
bin = bin.substring( 0, cidr ); // truncate bin
}
// Init bin_prefix
if( bin_prefix === 0 ) {
bin_prefix = new String( bin );
// Get largest common bin_prefix
} else {
for( var x = 0; x < bin_prefix.length; x++ ) {
// Bin_prefix always smaller than bin unless a CIDR was used on bin
if( bin[x] == undefined || bin_prefix[x] != bin[x] ) {
bin_prefix = bin_prefix.substring( 0, x ); // shorten bin_prefix
break;
}
}
}
// Build the IP in CIDR form
var prefix_cidr = bin_prefix.length;
// CIDR too small?
if( prefix_cidr < 96 ) {
document.getElementById( 'mw-checkuser-cidr-res' ).value = '!';
document.getElementById( 'mw-checkuser-ipnote' ).innerHTML = '>' + Math.pow( 2, 128 - prefix_cidr );
return; // too big
}
// Build the IP in dotted-quad form
for( var z = 0; z <= 7; z++ ) {
var bloc = 0;
var start = z*16;
var end = start + 15;
for( var x = start; x <= end; x++ ) {
if( bin_prefix[x] == undefined ) {
break;
}
bloc += parseInt( bin_prefix[x], 10 ) * Math.pow( 2, end - x );
}
bloc = bloc.toString( 16 ); // convert to hex
prefix += ( z == 7 ) ? bloc : bloc + ':';
}
// Get IPs affected
ip_count = Math.pow( 2, 128 - prefix_cidr );
// Is the CIDR meaningful?
if( prefix_cidr == 128 ) {
prefix_cidr = false;
}
}
}
// Update form
if( prefix != '' ) {
if( prefix_cidr != false ) {
document.getElementById( 'mw-checkuser-cidr-res' ).value = prefix + '/' + prefix_cidr;
} else {
document.getElementById( 'mw-checkuser-cidr-res' ).value = prefix;
}
document.getElementById( 'mw-checkuser-ipnote' ).innerHTML = '~' + ip_count;
} else {
document.getElementById( 'mw-checkuser-cidr-res' ).value = '?';
document.getElementById( 'mw-checkuser-ipnote' ).innerHTML = '';
}
}
addOnloadHook( updateCIDRresult );
// Utility function to convert hex to integers
function hex2int( hex ) {
hex = new String( hex );
hex = hex.toLowerCase();
var intform = 0;
for( var i = 0; i < hex.length; i++ ) {
var digit = 0;
switch( hex[i] ) {
case 'a':
digit = 10;
break;
case 'b':
digit = 11;
break;
case 'c':
digit = 12;
break;
case 'd':
digit = 13;
break;
case 'e':
digit = 14;
break;
case 'f':
digit = 15;
break;
default:
digit = parseInt( hex[i], 10 );
break;
}
intform += digit * Math.pow( 16, hex.length - 1 - i );
}
return intform;
}
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