ipc: add base of IPC

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/service/ipc_pipe.go b/service/ipc_pipe.go
new file mode 100644
index 00000000..ee63f2d4
--- /dev/null
+++ b/service/ipc_pipe.go
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package service
+
+import (
+	"golang.org/x/sys/windows"
+	"os"
+	"strconv"
+)
+
+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 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
+	}
+	err = windows.SetHandleInformation(windows.Handle(theirWriter.Fd()), windows.HANDLE_FLAG_INHERIT, windows.HANDLE_FLAG_INHERIT)
+	if err != nil {
+		return
+	}
+	theirWriterStr = strconv.FormatUint(uint64(theirWriter.Fd()), 10)
+
+	theirReader, ourWriter, err = os.Pipe()
+	if err != nil {
+		return
+	}
+	err = windows.SetHandleInformation(windows.Handle(theirReader.Fd()), windows.HANDLE_FLAG_INHERIT, windows.HANDLE_FLAG_INHERIT)
+	if err != nil {
+		return
+	}
+	theirReaderStr = strconv.FormatUint(uint64(theirReader.Fd()), 10)
+
+	return
+}