Javascript implements verification of IP address and other related information code, javascriptip

Javascript implements verification of IP address and other related information code, javascriptip

This code is extracted from a personal project. It can be regarded as a fairly comprehensive and effective verification code for IP-related information for front-end verification.

/******************* // Determines whether the IP address is valid */var judgeIpIsLegal = function (ipAddr) {var regIps =/^ (25 [0-5] | 2 [0-4] \ d | 1 \ d {2} | [1-9] \ d | [0-9]) \.) {3} (25 [0-5] | 2 [0-4] \ d | 1 \ d {2} | [1-9] \ d | [0-9] )) $/; return regIps. test (ipAddr);}/* convert the IP address to a binary string * // * For example: 172.16.4.235 --> 10101100000100000000010011101011 */var praseIpToBinary = function (ipAddress) {var numArray = ipAddress. split (". "); if (numArray. length! = 4) {alert ("Incorrect IP address entered"); 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 ;} /* determine whether the subnet mask is valid * // * The subnet mask must be a continuous segment consisting of 1 and 0, such as 11110000 */var judgeS UbnetMask = 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;}/* two IP addresses and operation return results * // * this function is mainly used to implement IP address and subnet mask phase, obtain the IP address segment of the current IP Address * // * to verify whether the entered gateway address is valid */var getIPsAndResult = function (ipAddr1, ipAddr2) {var ipArray1 = ipAddr1.split (". "); var ipArray2 = ipAddr2.split (". "); var returnResult =" "; if (ipArray1.length! = 4 | ipArray2.length! = 4) {alert ("Incorrect IP address entered"); 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;}/* determine whether the gateway address is valid */var judgeGatewayResult = function (ipAddr, subnetMask, gateway) {var andResult1 = getIPsAndResult (ipAddr, subnetMask ); var andResult2 = getIPsAndResult (gateway, subnetMask); if (andResult1 = andResult2) {return true;} else {return false ;}}

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