[pve-devel] [PATCH proxmox-ve-rs 11/21] sdn: ipam: add method for generating ipsets

[Stefan Hanreich <s.hanreich@proxmox.com>]

For every guest that has at least one entry in the IPAM we generate an
ipset with the name `+dc/guest-ipam-{vmid}`. The ipset contains all
IPs from all zones for a guest with {vmid}.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 .../src/firewall/types/address.rs             |  9 ++++
 proxmox-ve-config/src/sdn/ipam.rs             | 54 ++++++++++++++++++-
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/proxmox-ve-config/src/firewall/types/address.rs b/proxmox-ve-config/src/firewall/types/address.rs
index 3ad1a7a..cd1d649 100644
--- a/proxmox-ve-config/src/firewall/types/address.rs
+++ b/proxmox-ve-config/src/firewall/types/address.rs
@@ -108,6 +108,15 @@ impl From<Ipv6Cidr> for Cidr {
     }
 }
 
+impl From<IpAddr> for Cidr {
+    fn from(value: IpAddr) -> Self {
+        match value {
+            IpAddr::V4(addr) => Ipv4Cidr::from(addr).into(),
+            IpAddr::V6(addr) => Ipv6Cidr::from(addr).into(),
+        }
+    }
+}
+
 const IPV4_LENGTH: u8 = 32;
 
 #[derive(Clone, Copy, Debug, PartialOrd, Ord, PartialEq, Eq, Hash)]
diff --git a/proxmox-ve-config/src/sdn/ipam.rs b/proxmox-ve-config/src/sdn/ipam.rs
index 682bbe7..febbc0b 100644
--- a/proxmox-ve-config/src/sdn/ipam.rs
+++ b/proxmox-ve-config/src/sdn/ipam.rs
@@ -8,7 +8,11 @@ use std::{
 use serde::Deserialize;
 
 use crate::{
-    firewall::types::Cidr,
+    common::Allowlist,
+    firewall::types::{
+        ipset::{IpsetEntry, IpsetScope},
+        Cidr, Ipset,
+    },
     guest::{types::Vmid, vm::MacAddress},
     sdn::{SdnNameError, SubnetName, ZoneName},
 };
@@ -309,6 +313,54 @@ impl Ipam {
     }
 }
 
+impl Ipam {
+    /// generates an [`Ipset`] for all guests with at least one entry in the IPAM
+    ///
+    /// # Arguments
+    /// * `filter` - A [`Allowlist<Vmid>`] for which IPsets should get returned
+    ///
+    /// It contains all IPs in all VNets, that a guest has stored in IPAM.
+    /// Ipset name is of the form `guest-ipam-<vmid>`
+    pub fn ipsets<'a>(
+        &self,
+        filter: impl Into<Option<&'a Allowlist<Vmid>>>,
+    ) -> impl Iterator<Item = Ipset> + '_ {
+        let filter = filter.into();
+
+        self.entries
+            .iter()
+            .flat_map(|(_, entries)| entries.iter())
+            .filter_map(|entry| {
+                if let IpamData::Vm(data) = &entry.data() {
+                    if filter
+                        .map(|list| list.is_allowed(&data.vmid))
+                        .unwrap_or(true)
+                    {
+                        return Some(data);
+                    }
+                }
+
+                None
+            })
+            .fold(HashMap::<Vmid, Ipset>::new(), |mut acc, entry| {
+                match acc.get_mut(&entry.vmid) {
+                    Some(ipset) => {
+                        ipset.push(IpsetEntry::from(entry.ip));
+                    }
+                    None => {
+                        let ipset_name = format!("guest-ipam-{}", entry.vmid);
+                        let mut ipset = Ipset::from_parts(IpsetScope::Datacenter, ipset_name);
+                        ipset.push(IpsetEntry::from(entry.ip));
+                        acc.insert(entry.vmid, ipset);
+                    }
+                };
+
+                acc
+            })
+            .into_values()
+    }
+}
+
 impl TryFrom<IpamJson> for Ipam {
     type Error = IpamError;
 
-- 
2.39.2


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