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connect.rdns_access.js
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connect.rdns_access.js
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// connect.rdns_access plugin
exports.register = function() {
var i;
var config = this.config.get('connect.rdns_access.ini');
this.wl = this.config.get('connect.rdns_access.whitelist', 'list');
this.bl = this.config.get('connect.rdns_access.blacklist', 'list');
this.deny_msg = config.general && (config.general['deny_msg'] ||
'Connection rejected.');
var white_regex =
this.config.get('connect.rdns_access.whitelist_regex', 'list');
var black_regex =
this.config.get('connect.rdns_access.blacklist_regex', 'list');
if (white_regex.length) {
this.wlregex = new RegExp('^(?:' + white_regex.join('|') + ')$', 'i');
}
if (black_regex.length) {
this.blregex = new RegExp('^(?:' + black_regex.join('|') + ')$', 'i');
}
this.register_hook('connect', 'rdns_access');
}
exports.rdns_access = function(next, connection) {
var plugin = this;
// IP whitelist checks
if (connection.remote_ip) {
connection.logdebug(plugin, 'checking ' + connection.remote_ip +
' against connect.rdns_access.whitelist');
if (_in_whitelist(connection, plugin, connection.remote_ip)) {
connection.logdebug(plugin, "Allowing " + connection.remote_ip);
return next();
}
}
// hostname whitelist checks
if (connection.remote_host) {
connection.logdebug(plugin, 'checking ' + connection.remote_host +
' against connect.rdns_access.whitelist');
if (_in_whitelist(connection, plugin, connection.remote_host.toLowerCase())) {
connection.logdebug(plugin, "Allowing " + connection.remote_host);
return next();
}
}
// IP blacklist checks
if (connection.remote_ip) {
connection.logdebug(plugin, 'checking ' + connection.remote_ip +
' against connect.rdns_access.blacklist');
if (_in_blacklist(connection, plugin, connection.remote_ip)) {
connection.logdebug(plugin, "Rejecting, matched: " +
connection.remote_ip);
return next(DENYDISCONNECT, connection.remote_host.toLowerCase() +
' [' + connection.remote_ip + '] ' + plugin.deny_msg);
}
}
// hostname blacklist checks
if (connection.remote_host) {
connection.logdebug(plugin, 'checking ' + connection.remote_host +
' against connect.rdns_access.blacklist');
if (_in_blacklist(connection, plugin, connection.remote_host.toLowerCase())) {
connection.logdebug(plugin, "Rejecting, matched: " +
connection.remote_host);
return next(DENYDISCONNECT, connection.remote_host.toLowerCase() +
' [' + connection.remote_ip + '] ' + plugin.deny_msg);
}
}
return next();
}
function _in_whitelist(connection, plugin, host) {
var i;
for (i in plugin.wl) {
connection.logdebug(plugin, 'checking ' + host + ' against ' +
plugin.wl[i]);
if (plugin.wl[i].toLowerCase() === host) {
return 1;
}
}
if (plugin.wlregex) {
connection.logdebug(plugin, 'checking ' + host + ' against ' +
plugin.wlregex.source);
if (host.match(plugin.wlregex)) {
return 1;
}
}
return 0;
}
function _in_blacklist(connection, plugin, host) {
var i;
for (i in plugin.bl) {
connection.logdebug(plugin, 'checking ' + host + ' against ' +
plugin.bl[i]);
if (plugin.bl[i].toLowerCase() === host) {
return 1;
}
}
if (plugin.blregex) {
connection.logdebug(plugin, 'checking ' + host + ' against ' +
plugin.blregex.source);
if (host.match(plugin.blregex)) {
return 1;
}
}
return 0;
}