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Converting Ip string to Integer to check if it falls within an CIDR block

I have a set of vertices that contain a property Ip which is declared as String.

I want to check if this IP is inside a CIDR block or within IP ranges.

Is there a way to convert String up attribute to a number so that I can perform the operation.

Solution

  • Gremlin today does not have String manipulation steps and operators so you cannot do things like convert Strings to Integers or split and concatenate Strings. It does however have a math step.

    I see two options:

    1. Store the IP as a list of 4 numbers or as four individual properties.

    2. Use in-line code (lambdas) to do the work. However many graph DBs do not allow in-line lambda code and in general it is not recommended as a best practice.

    If you were able to store the values as a list or as four properties you could then use the math step to convert the four bytes into a single decimal number and compare with other numbers.

    In the short term, it might be better to store IP addresses as simple 4-byte integer values to make the comparisons easier.