From 0a55a284d5edcb792848448b5415e4faea437038 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Tue, 6 Nov 2018 15:46:44 +0100
Subject: wireguard-go-bridge: take fd instead of fnptr

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 wireguard-go-bridge/src/tun/api-ios.go | 52 ++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 wireguard-go-bridge/src/tun/api-ios.go

(limited to 'wireguard-go-bridge/src/tun/api-ios.go')

diff --git a/wireguard-go-bridge/src/tun/api-ios.go b/wireguard-go-bridge/src/tun/api-ios.go
new file mode 100644
index 0000000..476669f
--- /dev/null
+++ b/wireguard-go-bridge/src/tun/api-ios.go
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+package tun
+
+import (
+	"git.zx2c4.com/wireguard-go/rwcancel"
+	"golang.org/x/sys/unix"
+	"net"
+	"os"
+)
+
+func CreateTUNFromFD(tunFd int) (TUNDevice, string, error) {
+	file := os.NewFile(uintptr(tunFd), "/dev/tun")
+	tun := &nativeTun{
+		tunFile: file,
+		fd:      file.Fd(),
+		events:  make(chan TUNEvent, 5),
+		errors:  make(chan error, 5),
+	}
+	var err error
+	tun.rwcancel, err = rwcancel.NewRWCancel(tunFd)
+	if err != nil {
+		return nil, "", err
+	}
+	name, err := tun.Name()
+	if err != nil {
+		tun.rwcancel.Cancel()
+		return nil, "", err
+	}
+	tunIfindex, err := func() (int, error) {
+		iface, err := net.InterfaceByName(name)
+		if err != nil {
+			return -1, err
+		}
+		return iface.Index, nil
+	}()
+	if err != nil {
+		tun.tunFile.Close()
+		return nil, "", err
+	}
+	tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
+	if err != nil {
+		tun.tunFile.Close()
+		return nil, "", err
+	}
+	go tun.routineRouteListener(tunIfindex)
+
+	return tun, name, nil
+}
-- 
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