From 69f0fe67b63d90e523a5a1241fb1b46c2e8dbe03 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 3 Mar 2019 04:04:41 +0100
Subject: global: begin modularization

---
 ipc/uapi_windows.go | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 ipc/uapi_windows.go

(limited to 'ipc/uapi_windows.go')

diff --git a/ipc/uapi_windows.go b/ipc/uapi_windows.go
new file mode 100644
index 0000000..209d0d2
--- /dev/null
+++ b/ipc/uapi_windows.go
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package ipc
+
+import (
+	"github.com/Microsoft/go-winio"
+	"net"
+)
+
+//TODO: replace these with actual standard windows error numbers from the win package
+const (
+	IpcErrorIO        = -int64(5)
+	IpcErrorProtocol  = -int64(71)
+	IpcErrorInvalid   = -int64(22)
+	IpcErrorPortInUse = -int64(98)
+)
+
+type UAPIListener struct {
+	listener net.Listener // unix socket listener
+	connNew  chan net.Conn
+	connErr  chan error
+	kqueueFd int
+	keventFd int
+}
+
+func (l *UAPIListener) Accept() (net.Conn, error) {
+	for {
+		select {
+		case conn := <-l.connNew:
+			return conn, nil
+
+		case err := <-l.connErr:
+			return nil, err
+		}
+	}
+}
+
+func (l *UAPIListener) Close() error {
+	return l.listener.Close()
+}
+
+func (l *UAPIListener) Addr() net.Addr {
+	return l.listener.Addr()
+}
+
+func UAPIListen(name string) (net.Listener, error) {
+	config := winio.PipeConfig{
+		SecurityDescriptor: "", //TODO: we want this to be a very locked down pipe.
+	}
+	listener, err := winio.ListenPipe("\\\\.\\pipe\\wireguard\\"+name, &config) //TODO: choose sane name.
+	if err != nil {
+		return nil, err
+	}
+
+	uapi := &UAPIListener{
+		listener: listener,
+		connNew:  make(chan net.Conn, 1),
+		connErr:  make(chan error, 1),
+	}
+
+	go func(l *UAPIListener) {
+		for {
+			conn, err := l.listener.Accept()
+			if err != nil {
+				l.connErr <- err
+				break
+			}
+			l.connNew <- conn
+		}
+	}(uapi)
+
+	return uapi, nil
+}
-- 
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