krata: reorganize crates

crates/kratactl/src/client.rs

@@ -0,0 +1,44 @@
+use anyhow::Result;
+use krata::{control::control_service_client::ControlServiceClient, dial::ControlDialAddress};
+use tokio::net::UnixStream;
+use tonic::transport::{Channel, ClientTlsConfig, Endpoint, Uri};
+use tower::service_fn;
+
+pub struct ControlClientProvider {}
+
+impl ControlClientProvider {
+    pub async fn dial(addr: ControlDialAddress) -> Result<ControlServiceClient<Channel>> {
+        let channel = match addr {
+            ControlDialAddress::UnixSocket { path } => {
+                // This URL is not actually used but is required to be specified.
+                Endpoint::try_from(format!("unix://localhost/{}", path))?
+                    .connect_with_connector(service_fn(|uri: Uri| {
+                        let path = uri.path().to_string();
+                        UnixStream::connect(path)
+                    }))
+                    .await?
+            }
+
+            ControlDialAddress::Tcp { host, port } => {
+                Endpoint::try_from(format!("http://{}:{}", host, port))?
+                    .connect()
+                    .await?
+            }
+
+            ControlDialAddress::Tls {
+                host,
+                port,
+                insecure: _,
+            } => {
+                let tls_config = ClientTlsConfig::new().domain_name(&host);
+                let address = format!("https://{}:{}", host, port);
+                Channel::from_shared(address)?
+                    .tls_config(tls_config)?
+                    .connect()
+                    .await?
+            }
+        };
+
+        Ok(ControlServiceClient::new(channel))
+    }
+}