1 files changed, 41 insertions, 0 deletions
diff --git a/lib/transport.ml b/lib/transport.ml
new file mode 100644
index 0000000..5130a2d
--- /dev/null
+++ b/lib/transport.ml
@@ -0,0 +1,41 @@
+module type TRANSPORT = sig
+  type t
+  type connection
+  type options
+
+  val create : options -> t
+
+  val listen : t -> unit
+  val accept : t -> connection
+
+  val input : connection -> in_channel
+  val output : connection -> out_channel
+end
+
+(* TODO: move this into TCP once we have a proper configuration system *)
+type tcp_options = {
+  address_family : Unix.socket_domain;
+  address : Unix.sockaddr
+}
+
+module TCP : (TRANSPORT with type options = tcp_options) = struct
+  type t = Unix.file_descr
+  type connection = Unix.file_descr
+  type options = tcp_options
+
+  let create { address_family; address } =
+    let socket = Unix.socket address_family Unix.SOCK_STREAM 0 in
+    Unix.setsockopt socket Unix.SO_REUSEADDR true;
+    Unix.setsockopt socket Unix.SO_REUSEPORT true;
+    Unix.bind socket address;
+    socket
+
+  let listen fd = Unix.listen fd 5
+
+  let accept fd =
+    let (conn, _) = Unix.accept fd in
+    conn
+
+  let input = Unix.in_channel_of_descr
+  let output = Unix.out_channel_of_descr
+end