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tun: freebsd: use broadcast mode instead of PPP mode

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It makes the routing configuration simpler.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-03-23 12:41:34 -06:00
parent 5f0c8b942d
commit 12ce53271b
1 changed files with 17 additions and 0 deletions
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17
tun/tun_freebsd.go
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@ -292,6 +292,23 @@ func CreateTUN(name string, mtu int) (Device, error) {
return nil, fmt.Errorf("Unable to put into IFHEAD mode: %w", errno)
}
// Get out of PPP mode.
ifflags := syscall.IFF_BROADCAST
tun.operateOnFd(func(fd uintptr) {
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(_TUNSIFMODE),
uintptr(unsafe.Pointer(&ifflags)),
)
})
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("Unable to put into IFF_BROADCAST mode: %w", errno)
}
// Open control sockets
confd, err := unix.Socket(
unix.AF_INET,