#Convert mac address to ip address code#

The first 3 bytes designate the manufacturer and the last three are a number given to it at manufacture by the maker. On a more involved level (which you don't really need to know for setting up routers and stuff) mac addresses are usually unique to a device and you can't have more than 1 of that number on a local (non routed) network. IP addresses on the other hand are now 4 bytes (until IPv6 happens) and almost always expressed in Decimal format as a number 0 - 255. Sometimes the letters are upper case, sometimes lower case, but never mixed. They are invariably expressed in hexdecimal notation (base 16, uses the characters 0-9 + A-F - each byte uses 2 characters since 16 * 16 is 256).

#Convert mac address to ip address code#

The output code should be able to trust that the string indeed contains only hexadecimal digits.Īnd it's actually easier to detect a malformed string this way than by detecting whether the replacement did nothing.A mac address is always 6 bytes long, how they are seperated varies, but is usually colons. If you really want, but I think input validation is a different problem than output formatting here. This implicitly gives you groups of two characters to replace. So after the first two characters have been matched, the next match can only occur This works because the regex engine won't look for matches that extend backwards into previous matches. Except at the end of the string, which is done via a negative lookahead preventing a match at the end of the string. In a replacement string represents the match) followed by This regex matches two characters at a time and replaces them by the same characters ( You actually want to insertĪfter every two characters (except at the end of the string) instead of trying to capture every single character and forcing it into the desired format. Think about it in terms of smaller units. Would really appreciate if someone could point me in the right direction! I think the problem is that I don't understand how groups work properly. (6 groups of 2 characters each) and then the replacement: I think I need to group each section into variables using Is there some way of making this more concise? I am trying to convert some string input into the correct format for working with a MAC address. Query generates an output response according to selected options.As well as tool produces an invalid input message response if provided MAC address is invalid or not convert able. It takes MAC Address as input string and generates a query against given MAC address and conversion option like convert into IPv6 to IPv4 or both then performs the above steps. You can also use perfect MAC address converter can convert any MAC address into IPv4 internet protocol address ranges and IPV6 internet protocol address ranges.

Prepend the link-local prefix: fe80::5074:f2ff:feb1:a87f. Replace first octet with newly calculated one: 5074:f2ff:feb1:a87f. Reformat to IPv6 notation 5274:f2ff:feb1:a87f.Ĭonvert the first octet from hexadecimal to binary: 52 -> 01010010. Take the mac address: for example 52:74:f2:b1:a8:7f. Here is the MAC to IP address conversion process step by step: