2 files changed, 58 insertions, 0 deletions
diff --git a/mullvad_daemon/src/main.rs b/mullvad_daemon/src/main.rs
index fa1db7765c..1177e05bd7 100644
--- a/mullvad_daemon/src/main.rs
+++ b/mullvad_daemon/src/main.rs
@@ -22,6 +22,7 @@ extern crate talpid_ipc;
 
 mod management_interface;
 mod states;
+mod rpc_info;
 
 use management_interface::{ManagementInterfaceServer, TunnelCommand};
 use states::{SecurityState, TargetState};
@@ -151,6 +152,8 @@ impl Daemon {
             "Mullvad management interface listening on {}",
             server.address()
         );
+        rpc_info::write(server.address()).chain_err(|| ErrorKind::ManagementInterfaceError(
+                "Failed to write RPC address to file"))?;
         Ok(server)
     }
 
@@ -309,6 +312,14 @@ impl Daemon {
     }
 }
 
+impl Drop for Daemon {
+    fn drop(self: &mut Daemon) {
+        if let Err(e) = rpc_info::remove() {
+            log_error("Unable to clean up rpc address file", e);
+        }
+    }
+}
+
 
 fn log_error<E>(msg: &str, error: E)
     where E: error_chain::ChainedError
diff --git a/mullvad_daemon/src/rpc_info.rs b/mullvad_daemon/src/rpc_info.rs
new file mode 100644
index 0000000000..f1dae58506
--- /dev/null
+++ b/mullvad_daemon/src/rpc_info.rs
@@ -0,0 +1,47 @@
+use std::fs::{self, File, OpenOptions};
+use std::io::{self, Write};
+use std::path::{Path, PathBuf};
+
+error_chain! {
+    errors {
+        WriteFailed(path: PathBuf) {
+            description("Failed to write RCP address to file")
+            display("Failed to write RPC address to {}", path.to_string_lossy())
+        }
+        RemoveFailed(path: PathBuf) {
+            description("Failed to remove file")
+            display("Failed to remove {}", path.to_string_lossy())
+        }
+    }
+}
+
+lazy_static! {
+    /// The path to the file where we write the RPC address
+    static ref RPC_ADDRESS_FILE_PATH: &'static Path = Path::new("./.mullvad_rpc_address");
+}
+
+/// Writes down the RPC address to some API to a file.
+pub fn write(rpc_address: &str) -> Result<()> {
+    open_file(*RPC_ADDRESS_FILE_PATH)
+        .and_then(|mut file| file.write_all(rpc_address.as_bytes()))
+        .chain_err(|| ErrorKind::WriteFailed(RPC_ADDRESS_FILE_PATH.to_owned()))?;
+
+    debug!(
+        "Wrote RPC address to {}",
+        RPC_ADDRESS_FILE_PATH.to_string_lossy()
+    );
+    Ok(())
+}
+
+pub fn remove() -> Result<()> {
+    fs::remove_file(*RPC_ADDRESS_FILE_PATH)
+        .chain_err(|| ErrorKind::RemoveFailed(RPC_ADDRESS_FILE_PATH.to_owned()))
+}
+
+fn open_file(path: &Path) -> io::Result<File> {
+    OpenOptions::new()
+        .write(true)
+        .truncate(true)
+        .create(true)
+        .open(path)
+}