ns1/ipx

Extended IP operations for Go

ipx's Issues

Comparator logic

Right now, we don't have any logic for comparing IPs and nets.

You might imagine a CmpIP(a, b net.IP) int, CmpNet(a, b net.IPNet) int sort of signature.

ipaddress would blow up if you compared v4 and v6; we could panic, too, maybe?

uint128 hardening

The uint128 type is at the heart of all our ipv6 work but has no direct units or benchmarking.

We should verify its correctness with tests and benchmarks -- and then maybe make it faster.

Get broadcast for given IPNet

Reverse DNS pointer

It'd probably be helpful to export a reverse dns pointer helper as ipaddress does. This is straightforward for ipv4 but slightly more complicated for ipv6.

ReversePointer function for IPNet

_, n, _ := net.ParseCIDR("172.18.11.0/24")
ptr := ReversePointerNet(n)
fmt.Println(ptr)

Output: 11.18.172.in-addr.arpa

Sort logic

It'd probably be useful to have SortIPs(ips []net.IP) and SortNets(nets []*net.IPNet).

Questions include how to handle v4 vs v6 illegal args and what does an absolute ordering for networks look like?

IP increment overflows

Right now, the IP increment logic will probably just wrap around on overflow. Is that desired? We should decide and document / add tests that demo it.

IP iteration overflows

We need tests verifying that the v4/v6 logic behaves appropriately when hitting mins or maxes for their types. That probably looks like a) deciding what is appropriate, b) writing tests and c) making those tests pass.