netlink init.

Signed-off-by: Klaus Ma <klausm@nvidia.com>

Cargo.toml

@@ -45,6 +45,7 @@ nix = { version = "0.29", features = [
     "mount",
     "user",
     "process",
+    "socket",
 ] }
 oci-spec = "0.7.0"
 flate2 = "1.0"

src/apis/types.rs

@@ -48,6 +48,8 @@ pub enum ChariotError {
     IO(String),
     #[error("{0}")]
     Json(String),
+    #[error("{0}")]
+    Internal(String),
 }
 
 impl From<io::Error> for ChariotError {

src/core/main.rs

@@ -14,6 +14,8 @@ limitations under the License.
 mod cfg;
 mod cgroup;
 mod cmd;
+mod netlink;
+mod network;
 
 use std::error::Error;
 

src/core/netlink/mod.rs

@@ -0,0 +1,57 @@
+/*
+Copyright 2024 The openBCE Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+use std::os::fd::AsRawFd;
+
+use chariot::apis::{ChariotError, ChariotResult};
+
+use nix::sys::socket::{
+    bind, socket, AddressFamily, NetlinkAddr, SockFlag, SockProtocol, SockType,
+};
+use nix::unistd::getpid;
+
+pub fn add_route() -> ChariotResult<()> {
+    let fd = socket(
+        AddressFamily::Netlink,
+        SockType::Raw,
+        SockFlag::empty(),
+        SockProtocol::NetlinkRoute,
+    )?;
+
+    let pid = {
+        let pid = getpid().as_raw();
+        if pid < 0 {
+            Err(Box::new(ChariotError::Internal("invalid pid".to_string())))
+        } else {
+            Ok(pid)
+        }
+    }?;
+
+    let addr = NetlinkAddr::new(pid as u32, 0);
+
+    bind(fd.as_raw_fd(), &addr)?;
+
+    Ok(())
+}
+
+pub fn delete_route() -> ChariotResult<()> {
+    todo!()
+}
+
+pub fn add_snat() -> ChariotResult<()> {
+    todo!()
+}
+
+pub fn add_dnat() -> ChariotResult<()> {
+    todo!()
+}

src/core/network/mod.rs

@@ -0,0 +1,15 @@
+/*
+Copyright 2024 The openBCE Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+mod bridge;
+mod ovs;

src/core/network/ovs/mod.rs

@@ -0,0 +1,12 @@
+/*
+Copyright 2024 The openBCE Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/