From 5079298ce2fb783ccfff83b4cf4af57c74ed2546 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 27 May 2018 02:26:56 +0200
Subject: [PATCH] Disable broadcast mode on *BSD

Keeping it on makes IPv6 problematic and confuses routing daemons.
---
 tun/tun_freebsd.go | 13 -------------
 tun/tun_openbsd.go | 13 -------------
 2 files changed, 26 deletions(-)

diff --git a/tun/tun_freebsd.go b/tun/tun_freebsd.go
index 435ff91..8c7bcdd 100644
--- a/tun/tun_freebsd.go
+++ b/tun/tun_freebsd.go
@@ -262,19 +262,6 @@ func CreateTUN(name string, mtu int) (TUNDevice, error) {
 		return nil, fmt.Errorf("error %s", errno.Error())
 	}
 
-	// Set TUN iface to broadcast mode. TUN inferfaces on freebsd come up in point to point by default
-	ifmodemode := unix.IFF_BROADCAST
-	_, _, errno = unix.Syscall(
-		unix.SYS_IOCTL,
-		uintptr(tunfd),
-		uintptr(_TUNSIFMODE),
-		uintptr(unsafe.Pointer(&ifmodemode)),
-	)
-
-	if errno != 0 {
-		return nil, fmt.Errorf("error %s", errno.Error())
-	}
-
 	// Rename tun interface
 
 	// Open control socket
diff --git a/tun/tun_openbsd.go b/tun/tun_openbsd.go
index 3c1878b..5a341f6 100644
--- a/tun/tun_openbsd.go
+++ b/tun/tun_openbsd.go
@@ -129,19 +129,6 @@ func CreateTUN(name string, mtu int) (TUNDevice, error) {
 		return nil, err
 	}
 
-	// Set TUN iface to broadcast mode
-	ifmodemode := unix.IFF_BROADCAST
-	_, _, errno := unix.Syscall(
-		unix.SYS_IOCTL,
-		uintptr(tunfile.Fd()),
-		uintptr(_TUNSIFMODE),
-		uintptr(unsafe.Pointer(&ifmodemode)),
-	)
-
-	if errno != 0 {
-		return nil, fmt.Errorf("error %s", errno.Error())
-	}
-
 	tun, err := CreateTUNFromFile(tunfile, mtu)
 
 	if err == nil && name == "tun" {