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Code Issues Releases Wiki Activity

Added missing file

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Bryan Roe
2021-01-27 09:57:36 -08:00
parent 85ff9aece8
commit 53d79dca41
1 changed files with 122 additions and 0 deletions
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122
modules/util-dns.js Normal file
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@@ -0,0 +1,122 @@
/*
Copyright 2021 Intel Corporation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
function windows_dns()
{
var ret = [];
var ip = require('_GenericMarshal').CreateNativeProxy('Iphlpapi.dll');
ip.CreateMethod('GetNetworkParams');
var data = require('_GenericMarshal').CreateVariable(1024);
var len = require('_GenericMarshal').CreateVariable(4);
len.toBuffer().writeUInt32LE(1024);
if (ip.GetNetworkParams(data, len).Val == 0)
{
var dnsList = data.Deref(require('_GenericMarshal').PointerSize == 8 ? 272 : 268, 48);
do
{
ret.push(dnsList.Deref(require('_GenericMarshal').PointerSize, 16).toBuffer().toString());
} while ((dnsList = dnsList.Deref(0, require('_GenericMarshal').PointerSize).Deref().Deref(0, 48)).Val != 0);
}
return (ret);
}
function linux_dns()
{
var child = require('child_process').execFile('/bin/sh', ['sh']);
child.stdout.str = ''; child.stdout.on('data', function (c) { this.str += c.toString(); });
child.stderr.on('data', function () { });
child.stdin.write("cat /etc/resolv.conf | grep nameserver | tr '\n' '`' | awk -F'`' '");
child.stdin.write('{');
child.stdin.write(' DEL="";');
child.stdin.write(' printf "[";');
child.stdin.write(' for(i=1;i<NF;++i)');
child.stdin.write(' {');
child.stdin.write(' if($i~/^#/) { continue; }')
child.stdin.write(' z=split($i,T," ");');
child.stdin.write(' if(z==2 && T[1]=="nameserver")');
child.stdin.write(' {');
child.stdin.write(' printf "%s\\\"%s\\\"",DEL,T[2];');
child.stdin.write(' DEL=",";');
child.stdin.write(' }');
child.stdin.write(' }');
child.stdin.write(' printf "]";');
child.stdin.write("}'");
child.stdin.write('\nexit\n');
child.waitExit();
try
{
return(JSON.parse(child.stdout.str.trim()));
}
catch(e)
{
return ([]);
}
}
function macos_dns()
{
var child = require('child_process').execFile('/bin/sh', ['sh']);
child.stdout.str = ''; child.stdout.on('data', function (c) { this.str += c.toString(); });
child.stderr.on('data', function () { });
child.stdin.write("scutil --dns | grep nameserver | tr '\\n' '`' | awk -F'`' '");
child.stdin.write('{');
child.stdin.write(' DEL="";');
child.stdin.write(' printf "{";');
child.stdin.write(' for(i=1;i<NF;++i)');
child.stdin.write(' {');
child.stdin.write(' if($i ~ /^\\s* *\\t*nameserver\\[[0-9]]/)');
child.stdin.write(' {');
child.stdin.write(' A=split($i,TOK," ");');
child.stdin.write(' printf "%s\\"%s\\": \\"%s\\"", DEL, TOK[3], TOK[1];');
child.stdin.write(' DEL=",";');
child.stdin.write(' }');
child.stdin.write(' }');
child.stdin.write(' printf "}";');
child.stdin.write("}'");
child.stdin.write('\nexit\n');
child.waitExit();
try
{
var table = JSON.parse(child.stdout.str.trim());
return(table.keys());
}
catch(e)
{
return ([]);
}
}
switch (process.platform)
{
case 'linux':
case 'freebsd':
module.exports = linux_dns;
break;
case 'win32':
module.exports = windows_dns;
break;
case 'darwin':
module.exports = macos_dns;
break;
default:
module.exports = function () { return ([]); };
break;
}