javascript实现验证IP地址等相关信息代码

/* ****************** */

/* 判断IP地址是否合法 */

var judgeIpIsLegal = function(ipAddr){

  var regIps = /^(((25[0-5]|2[0-4]d|1d{2}|[1-9]d|[0-9]).){3}(25[0-5]|2[0-4]d|1d{2}|[1-9]d|[0-9]))$/;

  return regIps.test(ipAddr);

}

/* IP地址转换为二进制字符串 */

/* 例如：172.16.4.235 --> 10101100000100000000010011101011 */

var praseIpToBinary = function(ipAddress){

  var numArray = ipAddress.split(".");

  if(numArray.length != 4){

    alert("输入的IP有误");

    return;

  }

  var returnIpStr = "";

  for (var i = 0; i < 4; i++) {

    var curr_num = numArray[i];

    var number_Bin = parseInt(curr_num);

    number_Bin = number_Bin.toString(2);

    var iCount = 8-number_Bin.length;

    for (var j = 0; j < iCount; j++) {

      number_Bin = "0"+number_Bin;

    }

    returnIpStr += number_Bin;

  }

  return returnIpStr;

}

/* 判断子网掩码是否合法 */

/* 子网掩码必须是 1 和 0组成的连续的一段 如 11110000 */

var judgeSubnetMask = function(ipAddress){

  var binaryIpString = praseIpToBinary(ipAddress).toString();

  var subIndex = binaryIpString.lastIndexOf("1")+1;

  var frontHalf = binaryIpString.substring(0,subIndex);

  var backHalf = binaryIpString.substring(subIndex);

  if(frontHalf.indexOf("0") != -1 || backHalf.indexOf("1") != -1){

    return false;

  }else{

    return true;

  }

}

/* 两个IP地址做 与 操作 返回结果 */

/* 该功能主要用来实现 IP地址和子网掩码 相与，获取当前IP地址的IP地址段 */

/* 以此来验证输入的网关地址是否合法 */

var getIPsAndResult = function(ipAddr1,ipAddr2){

  var ipArray1 = ipAddr1.split(".");

  var ipArray2 = ipAddr2.split(".");

  var returnResult = "";

  if(ipArray1.length != 4 || ipArray2.length != 4 ){

    alert("输入的IP有误");

    return;

  }

  for (var i = 0; i < 4; i++) {

    var number1 = parseInt(ipArray1[i]);

    var number2 = parseInt(ipArray2[i]);

    returnResult += number1&number2;

    if(i<3){

      returnResult += ".";

    }

  }

  return returnResult;

}

/* 判断网关地址是否合法 */

var judgeGatewayResult = function(ipAddr,subnetMask,gateway){

  var andResult1 = getIPsAndResult(ipAddr,subnetMask);

  var andResult2 = getIPsAndResult(gateway,subnetMask);

  if(andResult1 == andResult2){

    return true;

  }else{

    return false;

  }

}