ip4 address format

The main code for verifying the email format is as follows: Public bool isemail (string str_email) { Return System. text. regularexpressions. regEx. ismatch (str_email, @ "^ ([/W-/.] +) @ (/[0-9] {1, 3 }/. [0-9] {1, 3 }/. [0-9] {1, 3 }/.) | ([/W-] + /.) +) ([A-Za-Z] {2, 4} | [0-9] {1, 3}) (/)?] $ "); } The main code for verifying the IP address format is as follo

First, we will use the Linux interface to convert unsigned Int or unsigned long data to the point-to-decimal method:1. The declaration of the inet_ntoa () function is included in the/usr/include/ARPA/inet. h file:Extern char * inet_ntoa (struct in_addr _ In) _ Throw;_ In: struct variable of struct in_addr.So what is this struct variable? Let's take a look:Struct in_addr{Unsigned long s_addr;};Therefore, in fact, the in_addr struct is a variable of the unsigned long type used to render a person.O

Php code used to check whether the URL address and http address format are valid /** Desc: Check whether the network address format is valid Link: bbs.it-home.org Date: */ Function checkUrl ($ weburl) { Retu

(Calendar.day_of_year)); - Public FinalString Day_of_month =string.valueof (Calendar.getinstance (). Get (Calendar.day_of_month)); - Public FinalString Day_of_week =string.valueof (Calendar.getinstance (). Get (Calendar.day_of_week)); the - - - /** + * Get current time - * @returncurrent time, 24 hours yyyy-mm-dd HH:mm:ss format + */ A PublicString GetTime24 () { atDate Date =NewDate (); -SimpleDateFormat TimeStamp =Ne

/** DESC: Check network address format is valid link:bbs.it-home.org Date:2013/2/24 */ function Checkurl ($weburl) { Return!ereg ("^http (s) *://[_a-za-z0-9-]+ (. [ _a-za-z0-9-]+) *$ ", $weburl); }?> Copy Code2. Determine if the HTTP address is valid

marketing department reflects the characteristics of his local subnet. Let's take a look at the ipv4 classification features. Otherwise, it will be confusing. Embedded Ipv4 address: ing Ipv4 to Ipv6 0000 0000 0000 ...... 0000 FFFF w. x. y. z The first 80 bits are all 0, and the first 16 bits of the 32bit IPv4 are all 1, which constitute the address mapped to Ipv6. Multicast

'================================================ ' Function name: Formatremoteurl ' function: Format to current Web site complete url-convert relative address to absolute address ' parameter: URL----URL string ' Parameters: Currenturl----URL of course site ' Return value: The URL after the format is taken '===========

$raw = netsh wlan show network mode=Bssid$ssids= $raw | Select-string-pattern'ssid\b'| Select-string-pattern'\bbssid\s[^1]\b'-notmatch | foreach-Object {$_. ToString (). PadRight ( One) +'_'#有些扫描出来的SSID没有名字, so I'll simply have all SSOD names followed by an underscore to ensure subsequent formatting is correct} $ssids 2= $ssids-Split '\b\s\d{1,}\s{1,}[:]\s+\b'|Select-string-pattern'ssid\b'-notmatch #分割字符, SSID | for($i =0; $i-lt $ssids 2. Count; $i = $i +2) {# $ssids 2[$i]. ToString (). Substri

In order to expand the network, we use the IPv6 protocol. As an improvement of the previous version protocol, the address type in the traditional sense is no longer applicable, now let's analyze the types of IPv6 addresses and basic knowledge about text representation. The leading position in the address defines the specific IPv6 address type. A variable-length f

() functionLine such as "abc" = = "abc" "ABC" ==> "ABC"Answer: String.prototype.trim=function(){ var result=this.replace(/^\s+|\s+$/g,""); return result; }(4) Implement a function to determine if it is the correct email addressThe problem is the use of Kauzheng expression, email address such as [email protected]So the notation should be/^ ([a-za-z0-9_.-]) +\@ ([a-za-z0-9-]) +.) + ([a-za-z0-9]{2,4}) $/Answer:function checkEmailAddre

The example of this article describes the method of JS authentication email address format. Share to everyone for your reference, specific as follows: Example 1: Copy Code code as follows: function checkrate (input) { var re =/^[_ ". 0-9a-z-]+@ ([0-9a-z][0-9a-z-]+.) {1,4} [A-z] {2,3}$/i; var nubmer = document.getElementById (input). value; if (!re.test (Nubmer)) {

Format before conversionThe converted Format80:d0:9b:0e:13:**60:f8:1d:c9:cb:**98:fe:94:3d:32:**bc:85:56:3d:d9:**[Email protected] huawei.mac.manager]# mysql-h192.168.*****-pa****-ne "Use Glpi;select glpi_ Devicenetworkcards.designation, Upper (Glpi_items_devicenetworkcards.mac) from Glpi_items_devicenetworkcards,glpi_ Devicenetworkcards where glpi_items_devicenetworkcards.devicenetworkcards_id = Glpi_devicenetworkcards.id and Glpi_ Devicenetworkcards.

The code is as follows: function Checkurl () { var url = document.getElementById (' URL '). value; if (url== ') { alert (' URL address cannot be empty '); return false; } else if (!isurl (URL)) { alert (' URL should be in the format of Http://www.jb51.net '); return false; } else { return true; } return false; } function Isurl (str){varreg=/[0-9a-za-z]+. (html|htm|shtml|jsp|asp|php|c

PHP IP address format detection function Copy Code code as follows: function Checkip ($IP) { $ip = Str_replace ("", "", $IP); $ip = Strtolower ($IP); $ip = Str_replace ("http://", "", $IP); $ip = Str_replace ("https://", "", $IP); if (Preg_match ('/[a-za-z_-]/', $ip)) { if (Preg_match ('/^) ([\w-]+\.) + ((COM) | (NET) | (org) | (gov\.cn) | (info) | (cc) | (com\.cn) | (net\.cn) | (org\.cn

First, Application Introduction In a WDS wireless bridging network, there are 3 address communications and 4 address communications between the primary and secondary routers, which are distinguished by the following: 3 Address communication : connected to the secondary router terminal sent to the main router data, its MAC

1, htonl () and Ntohl ()U_long PASCAL far Ntohl (U_long Netlong);U_short PASCAL far Ntohs (U_short netshort);Ntohl ()-----Network order into host orderU_long PASCAL far htonl (U_long Hostlong);U_short PASCAL far htons (U_short hostshort);HTONL ()-----host sequence into network order2, Inet_addr () and Inet_ntoa ()unsigned long PASCAL far inet_addr (const char FAR * CP);Char FAR * PASCAL far inet_ntoa (struct in_addr in);The INET_ADDR function requires a string as its argument, which specifies an

The problem is as follows: the database stores IP addresses and IP address masks, which need to be converted into the CIDR format, and not only convert the mask into a number corresponding to the CIDR. The problem is as follows: the database stores IP addresses and IP address masks, which need to be converted into the CIDR fo