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DIF_INSTALLDEVICE returns almost immediately, while the device
installation continues in the background. It might take a while, before
all registry keys and values are populated.
Previously, wireguard-go waited for HKLM\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\<id> registry key
only.
Followed by a SetInterfaceName() method of Wintun struct which tried to
access HKLM\SYSTEM\CurrentControlSet\Control\Network\
{4D36E972-E325-11CE-BFC1-08002BE10318}\<id>\Connection registry key
might not be available yet.
This commit loops until both registry keys are available before
returning from CreateInterface() function.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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As querying non-existing registry value and reading non-existing
registry string value both return ERROR_FILE_NOT_FOUND, we can
use later only.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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So this mostly reverts the switch to Sysconn for Linux.
Issue: https://github.com/golang/go/issues/30426
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The new sysconn function of Go 1.12 makes this possible:
package main
import "log"
import "os"
import "unsafe"
import "time"
import "syscall"
import "sync"
import "golang.org/x/sys/unix"
func main() {
fd, err := os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
if err != nil {
log.Fatal(err)
}
var ifr [unix.IFNAMSIZ + 64]byte
copy(ifr[:], []byte("cheese"))
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = unix.IFF_TUN
var errno syscall.Errno
s, _ := fd.SyscallConn()
s.Control(func(fd uintptr) {
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.TUNSETIFF),
uintptr(unsafe.Pointer(&ifr[0])),
)
})
if errno != 0 {
log.Fatal(errno)
}
b := [4]byte{}
wait := sync.WaitGroup{}
wait.Add(1)
go func() {
_, err := fd.Read(b[:])
log.Print("Read errored: ", err)
wait.Done()
}()
time.Sleep(time.Second)
log.Print("Closing")
err = fd.Close()
if err != nil {
log.Print("Close errored: " , err)
}
wait.Wait()
log.Print("Exiting")
}
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Driver <-> user-space communication is local and using native endian.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Stop relying to Go compiler optimizations and calculate the end offset
directly.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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In case reading from TUN device detected TUN device was closed, it
closed the file handle and set tunFile to nil. The tunFile is
automatically reopened on retry, but... If another packet comes in the
WireGuard calls Write() method. With tunFile set to nil, this will
cause access violation.
Therefore, locking was introduced.
Signed-off-by: Simon Rozman <simon@rozman.si>
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This allows buffer alignment and keeps it together with its meta-data.
Furthermore, the write buffer has been reduced - as long as we flush
after _every_ write, we don't need a 1MiB write buffer.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Do the WaitForSingleObject() always to provide high-load responsiveness.
Reorder events so TUN_SIGNAL_CLOSE has priority over
TUN_SIGNAL_DATA_AVAIL, to provide high-load responsiveness at all.
Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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Signed-off-by: Simon Rozman <simon@rozman.si>
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This is no longer necessary and actually breaks things
Reported-by: Chris Branch <cbranch@cloudflare.com>
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