ipv6_compare

The ipv6_compare function compares two IPv6 or IPv4 network address strings. The two IPv6 strings are parsed and compared while accounting for the combined IP-prefix mask calculated from argument prefixes, and the optional PrefixMask argument.

Syntax

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    ipv6_compare( Expr1, Expr2 [, PrefixMask ] )

Arguments

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• Expr1, Expr2: A string expression representing an IPv4 or IPv6 address. Denote a subnet mask with a forward slash /.
• PrefixMask: An integer from 0 to 128 representing the number of most-significant bits that are taken into account.

Results

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• 0: If the long representation of the first IPv6 string argument is equal to the second IPv6 string argument.
• 1: If the long representation of the first IPv6 string argument is greater than the second IPv6 string argument.
• -1: If the long representation of the first IPv6 string argument is less than the second IPv6 string argument.
• null: If conversion for one of the two IPv6 strings wasn’t successful.

Examples

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• ipv6_compare('::ffff:7f00:1', '127.0.0.1') returns as 0
• ipv6_compare('fe80::85d:e82c:9446:7994', 'fe80::85d:e82c:9446:7995') returns as -1
• ipv6_compare('192.168.1.1/24', '192.168.1.255/24') returns as 0
• ipv6_compare('fe80::85d:e82c:9446:7994/127', 'fe80::85d:e82c:9446:7995/127') returns as 0
• ipv6_compare('fe80::85d:e82c:9446:7994', 'fe80::85d:e82c:9446:7995', 127) returns as 0