/**
 * Created by benzhan on 15/8/25.
 */
var php = require('phpjs');

function getServerIp() {
    var os = require('os');
    var ipv4;
    var net = os.networkInterfaces();
    var en0 = net.en0 || net.eth0 || net.lo;
    for (var i = 0; i < en0.length; i++) {
        if (en0[i].family.toLowerCase() == 'ipv4') {
            ipv4 = en0[i].address;
        }
    }

    return ipv4;
}

function getClientIp(_req) {
    var ip = _req.headers['x-forwarded-for'] ||
        _req.connection.remoteAddress ||
        _req.socket && _req.socket.remoteAddress ||
        _req.connection.socket && _req.connection.socket.remoteAddress;

    var parts = ip && ip.split(':');
    if (parts && parts.length) {
        return parts[parts.length - 1];
    } else {
        return '';
    }
}

function checkIpRange(remote_ip, ip_array){
    //判断ip是否在白名单
    for (var i in ip_array) {
        var ip = ip_array[i];
        var ip_info = ip.split('/');
        var mask = ip_info[1] ? ip_info[1] : 32;

        var ip_mask = php.sprintf("%032b", php.ip2long(ip_info[0])).substr(0, mask);
        var remote_ip_mask = php.sprintf("%032b", php.ip2long(remote_ip)).substr(0, mask);
        if (ip_mask === remote_ip_mask) {
            return true;
        }
    }

    return false;
}

global['getServerIp'] = getServerIp;
global['getClientIp'] = getClientIp;
global['checkIpRange'] = checkIpRange;