Re: [pve-devel] [PATCH proxmox-ve-rs v2 13/25] sdn: add ipam module

[Wolfgang Bumiller <w.bumiller@proxmox.com>]

On Thu, Oct 10, 2024 at 05:56:25PM GMT, Stefan Hanreich wrote:
> This module includes structs for representing the JSON schema from the
> PVE ipam. Those can be used to parse the current IPAM state.
> 
> We also include a general Ipam struct, and provide a method for
> converting the PVE IPAM to the general struct. The idea behind this
> is that we have multiple IPAM plugins in PVE and will likely add
> support for importing them in the future. With the split, we can have
> our dedicated structs for representing the different data formats from
> the different IPAM plugins and then convert them into a common
> representation that can then be used internally, decoupling the
> concrete plugin from the code using the IPAM configuration.
> 
> Enforcing the invariants the way we currently do adds a bit of runtime
> complexity when building the object, but we get the upside of never
> being able to construct an invalid struct. For the amount of entries
> the ipam usually has, this should be fine. Should it turn out to be
> not performant enough we could always add a HashSet for looking up
> values and speeding up the validation. For now, I wanted to avoid the
> additional complexity.
> 
> Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
> ---
>  .../src/firewall/types/address.rs             |   8 +
>  proxmox-ve-config/src/guest/vm.rs             |   4 +
>  proxmox-ve-config/src/sdn/ipam.rs             | 330 ++++++++++++++++++
>  proxmox-ve-config/src/sdn/mod.rs              |   2 +
>  4 files changed, 344 insertions(+)
>  create mode 100644 proxmox-ve-config/src/sdn/ipam.rs
> 
> diff --git a/proxmox-ve-config/src/firewall/types/address.rs b/proxmox-ve-config/src/firewall/types/address.rs
> index 6978a8f..a7bb6ad 100644
> --- a/proxmox-ve-config/src/firewall/types/address.rs
> +++ b/proxmox-ve-config/src/firewall/types/address.rs
> @@ -61,6 +61,14 @@ impl Cidr {
>      pub fn is_ipv6(&self) -> bool {
>          matches!(self, Cidr::Ipv6(_))
>      }
> +
> +    pub fn contains_address(&self, ip: &IpAddr) -> bool {
> +        match (self, ip) {
> +            (Cidr::Ipv4(cidr), IpAddr::V4(ip)) => cidr.contains_address(ip),
> +            (Cidr::Ipv6(cidr), IpAddr::V6(ip)) => cidr.contains_address(ip),
> +            _ => false,
> +        }
> +    }
>  }
>  
>  impl fmt::Display for Cidr {
> diff --git a/proxmox-ve-config/src/guest/vm.rs b/proxmox-ve-config/src/guest/vm.rs
> index ed6c66a..3476b93 100644
> --- a/proxmox-ve-config/src/guest/vm.rs
> +++ b/proxmox-ve-config/src/guest/vm.rs
> @@ -18,6 +18,10 @@ static LOCAL_PART: [u8; 8] = [0xFE, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00];
>  static EUI64_MIDDLE_PART: [u8; 2] = [0xFF, 0xFE];
>  
>  impl MacAddress {
> +    pub fn new(address: [u8; 6]) -> Self {
> +        Self(address)
> +    }
> +
>      /// generates a link local IPv6-address according to RFC 4291 (Appendix A)
>      pub fn eui64_link_local_address(&self) -> Ipv6Addr {
>          let head = &self.0[..3];
> diff --git a/proxmox-ve-config/src/sdn/ipam.rs b/proxmox-ve-config/src/sdn/ipam.rs
> new file mode 100644
> index 0000000..682bbe7
> --- /dev/null
> +++ b/proxmox-ve-config/src/sdn/ipam.rs
> @@ -0,0 +1,330 @@
> +use std::{
> +    collections::{BTreeMap, HashMap},
> +    error::Error,
> +    fmt::Display,
> +    net::IpAddr,
> +};
> +
> +use serde::Deserialize;
> +
> +use crate::{
> +    firewall::types::Cidr,
> +    guest::{types::Vmid, vm::MacAddress},
> +    sdn::{SdnNameError, SubnetName, ZoneName},
> +};
> +
> +/// struct for deserializing a gateway entry in PVE IPAM

Max already mentioned it: docs are full sentences, so capitalize & end
with a `.` please.


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