Problem Statement

Every connected device around the world comes with a unique Media Access Control address, or a   MAC address. A common task a network administrator may come across is being able to identify a network device's manufacturer when given only a MAC address.

Interface with one (or numerous) APIs that exist on the internet and retrieve the device manufacturer based on a supplied MAC address. A MAC address that does not return a valid result should return the String "N/A".   An error related to the network connectivity or the API should return a null result. Many implementations on this page use http://api.macvendors.com/ which, as of 19th September 2021, is throttling requests. After only 2 calls, the following response is returned for all subsequent requests. If you are planning to use the same provider or going to run the examples on this page, consider building in a delay between two calls. {"errors":{"detail":"Too Many Requests","message":"Please slow down your requests or upgrade your plan at https://macvendors.com"}}

Let's start with the solution:

# Project: MAC Vendor Lookup

load "stdlib.ring"
macs = ["FC-A1-3E","FC:FB:FB:01:FA:21","88:53:2E:67:07:BE","D4:F4:6F:C9:EF:8D"]
for mac = 1 to len(macs)
     lookupvendor(macs[mac])
next

func lookupvendor(mac)
       url = download("api.macvendors.com/" + mac)
       see url + nl