1 files changed, 77 insertions, 0 deletions
diff --git a/manager/ipc_pipe.go b/manager/ipc_pipe.go
new file mode 100644
index 00000000..657a6275
--- /dev/null
+++ b/manager/ipc_pipe.go
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package manager
+
+import (
+	"os"
+	"strconv"
+
+	"golang.org/x/sys/windows"
+)
+
+type pipeRWC struct {
+	reader *os.File
+	writer *os.File
+}
+
+func (p *pipeRWC) Read(b []byte) (int, error) {
+	return p.reader.Read(b)
+}
+
+func (p *pipeRWC) Write(b []byte) (int, error) {
+	return p.writer.Write(b)
+}
+
+func (p *pipeRWC) Close() error {
+	err1 := p.writer.Close()
+	err2 := p.reader.Close()
+	if err1 != nil {
+		return err1
+	}
+	return err2
+}
+
+func makeInheritableAndGetStr(f *os.File) (str string, err error) {
+	sc, err := f.SyscallConn()
+	if err != nil {
+		return
+	}
+	err2 := sc.Control(func(fd uintptr) {
+		err = windows.SetHandleInformation(windows.Handle(fd), windows.HANDLE_FLAG_INHERIT, windows.HANDLE_FLAG_INHERIT)
+		str = strconv.FormatUint(uint64(fd), 10)
+	})
+	if err2 != nil {
+		err = err2
+	}
+	return
+}
+
+func inheritableEvents() (ourEvents *os.File, theirEvents *os.File, theirEventStr string, err error) {
+	theirEvents, ourEvents, err = os.Pipe()
+	if err != nil {
+		return
+	}
+	theirEventStr, err = makeInheritableAndGetStr(theirEvents)
+	return
+}
+
+func inheritableSocketpairEmulation() (ourReader *os.File, theirReader *os.File, theirReaderStr string, ourWriter *os.File, theirWriter *os.File, theirWriterStr string, err error) {
+	ourReader, theirWriter, err = os.Pipe()
+	if err != nil {
+		return
+	}
+	theirWriterStr, err = makeInheritableAndGetStr(theirWriter)
+	if err != nil {
+		return
+	}
+
+	theirReader, ourWriter, err = os.Pipe()
+	if err != nil {
+		return
+	}
+	theirReaderStr, err = makeInheritableAndGetStr(theirReader)
+	return
+}