[PATCH proxmox-perl-rs v5 21/46] pve-rs: sdn: add prefix lists module

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

Exposes the functionality from ve-config to Perl by providing helpers
for instantiating the Rust configuration from Perl. The module also
contains the implementation for the CRUD API methods, which will be
used for implementing the API methods in pve-network.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 pve-rs/Makefile                         |   1 +
 pve-rs/src/bindings/sdn/mod.rs          |   1 +
 pve-rs/src/bindings/sdn/prefix_lists.rs | 192 ++++++++++++++++++++++++
 3 files changed, 194 insertions(+)
 create mode 100644 pve-rs/src/bindings/sdn/prefix_lists.rs

diff --git a/pve-rs/Makefile b/pve-rs/Makefile
index 0a7f700..25642cd 100644
--- a/pve-rs/Makefile
+++ b/pve-rs/Makefile
@@ -32,6 +32,7 @@ PERLMOD_PACKAGES := \
 	  PVE::RS::ResourceScheduling::Static \
 	  PVE::RS::ResourceScheduling::Dynamic \
 	  PVE::RS::SDN::Fabrics \
+	  PVE::RS::SDN::PrefixLists \
 	  PVE::RS::SDN::RouteMaps \
 	  PVE::RS::SDN \
 	  PVE::RS::TFA
diff --git a/pve-rs/src/bindings/sdn/mod.rs b/pve-rs/src/bindings/sdn/mod.rs
index c571d28..9bddf1c 100644
--- a/pve-rs/src/bindings/sdn/mod.rs
+++ b/pve-rs/src/bindings/sdn/mod.rs
@@ -1,4 +1,5 @@
 pub(crate) mod fabrics;
+pub(crate) mod prefix_lists;
 pub(crate) mod route_maps;
 
 #[perlmod::package(name = "PVE::RS::SDN", lib = "pve_rs")]
diff --git a/pve-rs/src/bindings/sdn/prefix_lists.rs b/pve-rs/src/bindings/sdn/prefix_lists.rs
new file mode 100644
index 0000000..eafb70d
--- /dev/null
+++ b/pve-rs/src/bindings/sdn/prefix_lists.rs
@@ -0,0 +1,192 @@
+#[perlmod::package(name = "PVE::RS::SDN::PrefixLists", lib = "pve_rs")]
+pub mod pve_rs_sdn_prefix_lists {
+    //! The `PVE::RS::SDN::PrefixLists` package.
+    //!
+    //! This provides the configuration for the SDN fabrics, as well as helper methods for reading
+    //! / writing the configuration, as well as for generating ifupdown2 and FRR configuration.
+
+    use core::clone::Clone;
+    use std::collections::hash_map::Entry;
+    use std::collections::HashMap;
+    use std::ops::Deref;
+    use std::sync::Mutex;
+
+    use anyhow::{anyhow, Error};
+    use openssl::hash::{hash, MessageDigest};
+    use serde::{Deserialize, Serialize};
+
+    use perlmod::Value;
+    use proxmox_section_config::typed::{ApiSectionDataEntry, SectionConfigData};
+    use proxmox_ve_config::sdn::prefix_list::api::{
+        PrefixList as ApiPrefixList, PrefixListDeletableProperties, PrefixListUpdater,
+    };
+    use proxmox_ve_config::sdn::prefix_list::{PrefixList as ConfigPrefixList, PrefixListId};
+
+    /// A SDN PrefixList config instance.
+    #[derive(Serialize, Deserialize)]
+    pub struct PerlPrefixListConfig {
+        /// The fabric config instance
+        pub prefix_lists: Mutex<HashMap<String, ConfigPrefixList>>,
+    }
+
+    perlmod::declare_magic!(Box<PerlPrefixListConfig> : &PerlPrefixListConfig as "PVE::RS::SDN::PrefixLists::Config");
+
+    /// Class method: Parse the raw configuration from `/etc/pve/sdn/prefix-lists.cfg`.
+    #[export]
+    pub fn config(#[raw] class: Value, raw_config: &[u8]) -> Result<perlmod::Value, Error> {
+        let raw_config = std::str::from_utf8(raw_config)?;
+        let config = ConfigPrefixList::parse_section_config("prefix-lists.cfg", raw_config)?;
+
+        Ok(
+            perlmod::instantiate_magic!(&class, MAGIC => Box::new(PerlPrefixListConfig {
+                prefix_lists: Mutex::new(config.deref().clone()),
+            })),
+        )
+    }
+
+    /// Class method: Parse the configuration from `/etc/pve/sdn/.running_config`.
+    #[export]
+    pub fn running_config(
+        #[raw] class: Value,
+        prefix_lists: HashMap<String, ConfigPrefixList>,
+    ) -> Result<perlmod::Value, Error> {
+        let prefix_lists: SectionConfigData<ConfigPrefixList> =
+            SectionConfigData::from_iter(prefix_lists);
+
+        Ok(
+            perlmod::instantiate_magic!(&class, MAGIC => Box::new(PerlPrefixListConfig {
+                prefix_lists: Mutex::new(prefix_lists.deref().clone()),
+            })),
+        )
+    }
+
+    /// Method: Used for writing the running configuration.
+    #[export]
+    pub fn to_sections(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+    ) -> Result<HashMap<String, ConfigPrefixList>, Error> {
+        let config = this.prefix_lists.lock().unwrap();
+        Ok(config.deref().clone())
+    }
+
+    /// Method: Convert the configuration into the section config string.
+    ///
+    /// Used for writing `/etc/pve/sdn/prefix-lists.cfg`
+    #[export]
+    pub fn to_raw(#[try_from_ref] this: &PerlPrefixListConfig) -> Result<String, Error> {
+        let config = this.prefix_lists.lock().unwrap();
+
+        let prefix_lists: SectionConfigData<ConfigPrefixList> =
+            SectionConfigData::from_iter(config.deref().clone());
+
+        ConfigPrefixList::write_section_config("prefix-lists.cfg", &prefix_lists)
+    }
+
+    /// Method: Generate a digest for the whole configuration
+    #[export]
+    pub fn digest(#[try_from_ref] this: &PerlPrefixListConfig) -> Result<String, Error> {
+        let config = to_raw(this)?;
+        let hash = hash(MessageDigest::sha256(), config.as_bytes())?;
+
+        Ok(hex::encode(hash))
+    }
+
+    /// Method: Returns all prefix lists as a hash indexed with the IDs of the prefix lists.
+    #[export]
+    pub fn list(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+    ) -> Result<HashMap<String, ApiPrefixList>, Error> {
+        Ok(this
+            .prefix_lists
+            .lock()
+            .unwrap()
+            .iter()
+            .map(|(id, prefix_list)| {
+                let ConfigPrefixList::PrefixList(prefix_list) = prefix_list;
+                (id.clone(), prefix_list.clone())
+            })
+            .collect())
+    }
+
+    /// Method: Create a new PrefixList.
+    #[export]
+    pub fn create(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+        prefix_list: ApiPrefixList,
+    ) -> Result<(), Error> {
+        let mut prefix_lists = this.prefix_lists.lock().unwrap();
+
+        match prefix_lists.entry(prefix_list.id().to_string()) {
+            Entry::Occupied(_) => anyhow::bail!(
+                "prefix list already exists in configuration: {}",
+                prefix_list.id()
+            ),
+            Entry::Vacant(vacancy) => vacancy.insert(ConfigPrefixList::PrefixList(prefix_list)),
+        };
+
+        Ok(())
+    }
+
+    /// Method: Get a specific PrefixList.
+    #[export]
+    pub fn get(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+        id: PrefixListId,
+    ) -> Result<Option<ApiPrefixList>, Error> {
+        Ok(this
+            .prefix_lists
+            .lock()
+            .unwrap()
+            .get(&id.to_string())
+            .map(|prefix_list| {
+                let ConfigPrefixList::PrefixList(prefix_list) = prefix_list;
+                prefix_list.clone()
+            }))
+    }
+
+    /// Method: Update a PrefixList.
+    #[export]
+    pub fn update(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+        id: PrefixListId,
+        updater: PrefixListUpdater,
+        delete: Option<Vec<PrefixListDeletableProperties>>,
+    ) -> Result<(), Error> {
+        let mut prefix_lists = this.prefix_lists.lock().unwrap();
+
+        let ConfigPrefixList::PrefixList(prefix_list) = prefix_lists
+            .get_mut(id.as_str())
+            .ok_or_else(|| anyhow!("Could not find prefix list with id: {}", id))?;
+
+        let PrefixListUpdater { entries } = updater;
+
+        if let Some(entries) = entries {
+            prefix_list.entries = entries;
+        }
+
+        for deletable_property in delete.unwrap_or_default() {
+            match deletable_property {
+                PrefixListDeletableProperties::Entries => {
+                    prefix_list.entries = Vec::new();
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Method: Delete a PrefixList.
+    #[export]
+    pub fn delete(
+        #[try_from_ref] this: &PerlPrefixListConfig,
+        id: PrefixListId,
+    ) -> Result<(), Error> {
+        this.prefix_lists
+            .lock()
+            .unwrap()
+            .remove(&id.to_string())
+            .ok_or_else(|| anyhow!("could not find prefix list with id: {id}"))?;
+
+        Ok(())
+    }
+}
-- 
2.47.3