From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Thu, 6 Dec 2018 16:17:51 +0000 (+0100)
Subject: tun: remove nonblock hack for linux
X-Git-Tag: 0.0.20181222~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=651744561e9e31197d8ebb59f97ab3dae3c39687;p=thirdparty%2Fwireguard-go.git

tun: remove nonblock hack for linux

This is no longer necessary and actually breaks things

Reported-by: Chris Branch <cbranch@cloudflare.com>
---

diff --git a/tun/tun_linux.go b/tun/tun_linux.go
index bb6bede..6f91cfd 100644
--- a/tun/tun_linux.go
+++ b/tun/tun_linux.go
@@ -368,21 +368,11 @@ func (tun *nativeTun) Close() error {
 }
 
 func CreateTUN(name string, mtu int) (TUNDevice, error) {
-
-	// open clone device
-
-	// HACK: we open it as a raw Fd first, so that f.nonblock=false
-	// when we make it into a file object.
 	nfd, err := unix.Open(cloneDevicePath, os.O_RDWR, 0)
 	if err != nil {
 		return nil, err
 	}
 
-	err = unix.SetNonblock(nfd, true)
-	if err != nil {
-		return nil, err
-	}
-
 	fd := os.NewFile(uintptr(nfd), cloneDevicePath)
 	if err != nil {
 		return nil, err