| Age | Commit message (Collapse) | Author |
|---|
|
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
|
|
It was just returning "no such file or directory" (the String of the
syscall.Errno returned by CreateTUN).
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
|
|
This works around a startup race condition when competing with
HackListener, which is trying to do the same job. If HackListener
detects that the tundev is running while there is still an event in the
netlink queue that says it isn't running, then the device receives a
string of events like
EventUp (HackListener)
EventDown (NetlinkListener)
EventUp (NetlinkListener)
Unfortunately, after the first EventDown, the device stops itself,
thinking incorrectly that the administrator has downed its tundev.
The device is ignoring the initial EventDown anyway, so just don't emit
it.
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
|
|
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
|
|
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
|
|
Update the golang.org/x/sys/unix dependency and use the newly introduced
RTMGRP_* consts instead of using the corresponding RTNLGRP_* const to
create a mask.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
Signed-off-by: Jonathan Tooker <jonathan.tooker@netprotect.com>
|
|
Signed-off-by: Matt Layher <mdlayher@gmail.com>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
So this mostly reverts the switch to Sysconn for Linux.
Issue: https://github.com/golang/go/issues/30426
|
|
|
|
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")
}
|
|
|
|
|
|
|
|
This is no longer necessary and actually breaks things
Reported-by: Chris Branch <cbranch@cloudflare.com>
|
|
Doing so tends to make the tunnel blocking, so we only retrieve it once
before we call SetNonblock, and then cache the result.
|
|
|
|
|
|
|
|
GOPATH is annoying, but the Go community pushing me to adopt it is even
more annoying.
|
|
|
