tun: freebsd: set IFF_MULTICAST for routing daemons

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

diff --git a/tun/tun_freebsd.go b/tun/tun_freebsd.go
index c2ad65f5612e2870745f45e88f2d4c76492ae263..53d1584f2aff34a423227b35d53ccf3122d0186d 100644 (file)
--- a/tun/tun_freebsd.go
+++ b/tun/tun_freebsd.go
@@ -143,9 +143,9 @@ func (tun *NativeTun) routineRouteListener(tunIfindex int) {
 }
 
 func tunName(fd uintptr) (string, error) {
-       //Terrible hack to make up for freebsd not having a TUNGIFNAME
+       // Terrible hack to make up for freebsd not having a TUNGIFNAME
 
-       //First, make sure the tun pid matches this proc's pid
+       // First, make sure the tun pid matches this proc's pid
        _, _, errno := unix.Syscall(
                unix.SYS_IOCTL,
                uintptr(fd),
@@ -173,7 +173,7 @@ func tunName(fd uintptr) (string, error) {
 
        procPid := os.Getpid()
 
-       //Try to find interface with matching PID
+       // Try to find interface with matching PID
        for i := 1; ; i++ {
                iface, _ := net.InterfaceByIndex(i)
                if err != nil || iface == nil {
@@ -293,7 +293,7 @@ func CreateTUN(name string, mtu int) (Device, error) {
        }
 
        // Get out of PPP mode.
-       ifflags := syscall.IFF_BROADCAST
+       ifflags := syscall.IFF_BROADCAST | syscall.IFF_MULTICAST
        tun.operateOnFd(func(fd uintptr) {
                _, _, errno = unix.Syscall(
                        unix.SYS_IOCTL,