| Path : /var/www/html/tool-ob/ToolsPortal/node_modules/dns/lib/ |
|
B-Con CMD Config cPanel C-Rdp D-Log Info Jump Mass Ransom Symlink vHost Zone-H |
| Current File : /var/www/html/tool-ob/ToolsPortal/node_modules/dns/lib/dns.js |
module.exports = function () {
var dnsd = require('hbo-dnsd'),
dns = require('native-dns');
function Dns(config) {
var $this = this;
this.config = {};
this.config.host = process.env.DNSINTERFACE || config.dns.host;
this.config.port = process.env.DNSPORT || config.dns.port;
this.config.zone = process.env.DNSZONE || config.dns.zone;
this.config.ttl = process.env.DNSTTL || config.dns.ttl;
this.config.prefix = process.env.DNSPREFIX || config.dns.prefix;
this.config.primary = process.env.DNSPRIMARY || config.dns.primary;
this.config.secondary = process.env.DNSSECONDARY || config.dns.secondary;
this.config.timeout = process.env.DNSTIMEOUT || config.dns.timeout;
this.store = config.store;
this.meta = config.meta;
this.logger = config.logger;
this.logger.log('debug', "dns-config=%j", this.config, this.meta);
this.logger.log('debug', "env=%j", process.env, this.meta);
this.logger.log('debug', "store=%j", config.store, this.meta);
}
Dns.prototype.nativeDNS = function (dnsAddress, question, hostname, req, res, next) {
var timedout = false;
var $this = this,
nativeQuestion = dns.Question({
name : question.name,
type : question.type
}),
nativeReq = dns.Request({
question : nativeQuestion,
server : {
address : dnsAddress,
port : 53,
type : 'udp'
},
timeout: $this.config.timeout
});
nativeReq.on('timeout', function () {
if (dnsAddress === $this.config.secondary) {
$this.logger.log('error', '%s:%s/%s - %s - %s question:"%s" - %j -- timeout', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, dnsAddress, hostname, question, res.answer, $this.meta);
return next(new Error('DNS:nativeDNS:timeout: ' + $this.config.secondary));
}
$this.logger.log('warn', '%s:%s/%s - %s - %s question:"%s" - %j -- timeout', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, dnsAddress, hostname, question, res.answer, $this.meta);
timedout = true;
$this.nativeDNS($this.config.secondary, question, hostname, req, res, next);
});
nativeReq.on('message', function (err, answer) {
answer.answer.forEach(function (oneAnswer) {
answer = {
name : hostname,
type : question.type,
class: question.class,
data : oneAnswer.address,
ttl : oneAnswer.ttl
};
res.answer.push(answer);
});
});
nativeReq.on('end', function () {
if (!timedout) {
$this.logger.log('info', '%s:%s/%s - %s - %s question:"%s" - %j', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, dnsAddress, hostname, question, res.answer, $this.meta);
next(null);
}
});
nativeReq.send();
};
Dns.prototype.resolver = function(req, res) {
var $this = this,
question = res.question[0],
hostname = question.name,
length = hostname.length,
answer = {},
key = this.config.prefix + hostname;
this.store.get(key, function (err, value) {
$this.logger.log('debug', '%s:%s/%s - local - %s question:"%s" - store key[%s] value[%s] err[%j]', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, key, value, err, $this.meta);
var object;
if (!err && value) {
try {
object = JSON.parse(value);
$this.logger.log('debug', '%s:%s/%s - local - %s question:"%s" - store key[%s] value[%s] == object[%j]', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, key, value, object, $this.meta);
} catch (e) {
err = new Error("Exception [" + util.inspect(e, true) + "] while parsing store response [" + value + "]");
$this.logger.log('error', '%s:%s/%s - local - %s question:"%s" - store key[%s] value[%s]', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, key, value, $this.meta);
}
}
if (!err && object && object.hasOwnProperty(question.type)) {
answer = {
name: hostname,
type: question.type,
class: question.class,
ttl: $this.config.ttl
};
if (object[question.type]) {
var vector = object[question.type] instanceof Array ? object[question.type] : [object[question.type]];
vector.forEach(function(data) {
answer.data = ''+data;
res.answer.push(answer);
$this.logger.log('info', '%s:%s/%s - local - %s question:"%s" - %j', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, answer, $this.meta);
});
} else {
res.answer.push(answer);
$this.logger.log('info', '%s:%s/%s - local - %s question:"%s" - %j', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, answer, $this.meta);
}
return res.end();
}
// Log the error and try with the external DNS
if (err) {
$this.logger.log('error', 'dns/local GET hostname "%s" - err=%j', hostname, err, $this.meta);
}
// Send the requestion to the DNSPRIMARY and DNSSECONDARY
$this.nativeDNS($this.config.primary, question, hostname, req, res, function (err) {
if (err) {
$this.logger.log('error', '%s:%s/%s - local - %s question:"%s" - %j -- ERROR:%j', req.connection.remoteAddress, req.connection.remotePort, req.connection.type, hostname, question, res.answer, err, $this.meta);
}
res.end();
});
});
};
Dns.prototype.start = function() {
var $this = this;
this.server = dnsd.createServer(function (req, res) {
$this.resolver(req, res);
});
this.server.zone($this.config.zone,
'ns1.'+$this.config.zone,
'us@'+$this.config.zone,
'now', '2h', '30m', '2w', '10m'
).listen($this.config.port, $this.config.host);
};
function create(pkgConfig) {
return new Dns(pkgConfig);
}
return {
create : create
};
}();