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December 18, 2015 00:49
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Determine if a string is an IPv4 or IPv6 multicast or unicast ip address.
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| // Tests the ipAddress string and returns whether it's unicast or multicast. | |
| function getNetworkMode(ipAddress) { | |
| if(ipAddress.contains(':')) { | |
| // IPv6 | |
| if(/^ff\w{2}:/i.test(ipAddress)) | |
| return "Multicast"; | |
| return "Unicast"; | |
| } | |
| // an IPv4 address or a hostname | |
| var octetMatch = ipAddress.match(/^(\d+)\./); | |
| if(octetMatch == null) // ipAddress is a hostname | |
| return "Unicast"; | |
| // IPv4 address | |
| var firstOctet = octetMatch[1]; | |
| if(224 <= firstOctet && firstOctet <= 239) | |
| return "Multicast"; | |
| return "Unicast"; | |
| } |
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