Add OpenVpnEventDispatcher struct

4 files changed, 90 insertions, 0 deletions

diff --git a/talpid_core/Cargo.toml b/talpid_core/Cargo.toml
index c098d204d9..18c998cf93 100644
--- a/talpid_core/Cargo.toml
+++ b/talpid_core/Cargo.toml
@@ -8,6 +8,8 @@ description = "Core backend functionality of the Mullvad VPN client"
 duct = "0.8"
 error-chain = "0.10"
 log = "0.3"
+jsonrpc-core = { git = "https://github.com/faern/jsonrpc", branch = "bind-zero" }
+jsonrpc-macros = { git = "https://github.com/faern/jsonrpc", branch = "bind-zero" }
 
 [dependencies.talpid_ipc]
 path = "../talpid_ipc"
diff --git a/talpid_core/src/lib.rs b/talpid_core/src/lib.rs
index 1a10532787..8a053bffa8 100644
--- a/talpid_core/src/lib.rs
+++ b/talpid_core/src/lib.rs
@@ -13,11 +13,18 @@ extern crate log;
 
 #[macro_use]
 extern crate error_chain;
+extern crate jsonrpc_core;
+#[macro_use]
+extern crate jsonrpc_macros;
 
 extern crate talpid_ipc;
+extern crate openvpn_ffi;
 
 /// Working with processes.
 pub mod process;
 
 /// Network primitives.
 pub mod net;
+
+/// Abstracts over different VPN tunnel technologies
+pub mod tunnel;
diff --git a/talpid_core/src/tunnel/mod.rs b/talpid_core/src/tunnel/mod.rs
new file mode 100644
index 0000000000..0b477ca1c4
--- /dev/null
+++ b/talpid_core/src/tunnel/mod.rs
@@ -0,0 +1,2 @@
+/// A module for all OpenVPN related tunnel management.
+pub mod openvpn;
diff --git a/talpid_core/src/tunnel/openvpn.rs b/talpid_core/src/tunnel/openvpn.rs
new file mode 100644
index 0000000000..883c0a7cad
--- /dev/null
+++ b/talpid_core/src/tunnel/openvpn.rs
@@ -0,0 +1,79 @@
+use jsonrpc_core::{Error, IoHandler};
+use openvpn_ffi::{OpenVpnEnv, OpenVpnPluginEvent};
+
+use talpid_ipc;
+
+/// IPC server for listening on events coming from plugin loaded into OpenVPN
+pub struct OpenVpnEventDispatcher {
+    server: talpid_ipc::IpcServer,
+}
+
+impl OpenVpnEventDispatcher {
+    /// Construct and start the IPC server with the given event listener callback.
+    pub fn start<L>(on_event: L) -> talpid_ipc::Result<Self>
+        where L: Fn(OpenVpnPluginEvent, OpenVpnEnv) + Send + Sync + 'static
+    {
+        let rpc = OpenVpnEventApiImpl { on_event };
+        let mut io = IoHandler::new();
+        io.extend_with(rpc.to_delegate());
+        let server = talpid_ipc::IpcServer::start(io.into())?;
+        Ok(OpenVpnEventDispatcher { server })
+    }
+
+    /// Returns the local address this server is listening on.
+    pub fn address(&self) -> &str {
+        self.server.address()
+    }
+
+    /// Consumes the server and waits for it to finish.
+    pub fn wait(self) -> talpid_ipc::Result<()> {
+        self.server.wait()
+    }
+}
+
+
+mod api {
+    use super::*;
+    build_rpc_trait! {
+        pub trait OpenVpnEventApi {
+            #[rpc(name = "openvpn_event")]
+            fn openvpn_event(&self, OpenVpnPluginEvent, OpenVpnEnv) -> Result<(), Error>;
+        }
+    }
+}
+use self::api::*;
+
+struct OpenVpnEventApiImpl<L>
+    where L: Fn(OpenVpnPluginEvent, OpenVpnEnv) + Send + Sync + 'static
+{
+    on_event: L,
+}
+
+impl<L> OpenVpnEventApi for OpenVpnEventApiImpl<L>
+    where L: Fn(OpenVpnPluginEvent, OpenVpnEnv) + Send + Sync + 'static
+{
+    fn openvpn_event(&self, event: OpenVpnPluginEvent, env: OpenVpnEnv) -> Result<(), Error> {
+        debug!("OpenVPN event {:?}", event);
+        (self.on_event)(event, env);
+        Ok(())
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[ignore]
+    fn openvpn_event_dispatcher_server() {
+        let server = OpenVpnEventDispatcher::start(
+            |event, env| {
+                println!("event: {:?}. env: {:?}", event, env);
+            },
+        )
+                .unwrap();
+        println!("plugin server listening on {}", server.address());
+        server.wait().unwrap();
+    }
+}