ipv4_compare

The ipv4_compare function compares two IPv4 strings. The two IPv4 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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    ipv4_compare( Expr1, Expr2 [, PrefixMask ] )

Arguments

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• Expr1, Expr2: A string expression representing an IPv4 address. Denote a subnet mask with a forward slash /.
• PrefixMask: An integer from 0 to 32 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 IPv4 string argument is equal to the second IPv4 string argument
• 1: If the long representation of the first IPv4 string argument is greater than the second IPv4 string argument
• -1: If the long representation of the first IPv4 string argument is less than the second IPv4 string argument
• null: If conversion for one of the two IPv4 strings wasn’t successful.

Examples

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• ipv4_compare("127.0.0.1", "127.0.0.1") returns as 0
• ipv4_compare('192.168.1.1', '192.168.1.255') returns as -1
• ipv4_compare('192.168.1.1/24', '192.168.1.255/24') returns as 0
• ipv4_compare('192.168.1.1', '192.168.1.255', 24) returns as 0