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25 Commits

Author SHA1 Message Date
Tobias Klauser
3b490f30aa tun: use SockaddrCtl from golang.org/x/sys/unix on macOS 
Direct syscalls using unix.Syscall(unix.SYS_*, ...) are discouraged on
macOS and might not be supported in future versions. Switch to use
unix.Connect with unix.SockaddrCtl instead.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-27 16:20:09 +01:00
Tobias Klauser
e6b7c4eef3 tun: use Ioctl{Get,Set}IfreqMTU from golang.org/x/sys/unix on macOS 
Direct syscalls using unix.Syscall(unix.SYS_*, ...) are discouraged on
macOS and might not be supported in future versions. Switch to use
unix.Ioctl{Get,Set}IfreqMTU to get and set an interface's MTU.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-27 16:20:09 +01:00
Tobias Klauser
8ae09213a7 tun: use IoctlCtlInfo from golang.org/x/sys/unix on macOS 
Direct syscalls using unix.Syscall(unix.SYS_*, ...) are discouraged on
macOS and might not be supported in future versions. Switch to use
unix.IoctlCtlInfo to get the kernel control info.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-27 16:20:09 +01:00
Tobias Klauser
36dc8b6994 tun: use GetsockoptString in (*NativeTun).Name on macOS 
Direct syscalls using unix.Syscall(unix.SYS_*, ...) are discouraged on
macOS and might not be supported in future versions. Instead, use the
existing unix.GetsockoptString wrapper to get the interface name.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-27 16:20:09 +01:00
Jason A. Donenfeld
db0aa39b76 global: update header comments and modules 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-05-02 02:08:26 -06:00
Jason A. Donenfeld
caebdfe9d0 tun: darwin: ignore ENOMEM errors 
Coauthored-by: Andrej Mihajlov <and@mullvad.net>
 2020-01-15 13:39:37 -05:00
Jason A. Donenfeld
6d78f89557 tun: darwin: do not attempt to close tun.event twice 
Previously it was possible for this to race. It turns out we really
don't need to set anything to -1 anyway.
 2019-08-02 12:24:17 +02:00
Matt Layher
1f48971a80 tun: remove TUN prefix from types to reduce stutter elsewhere 
Signed-off-by: Matt Layher <mdlayher@gmail.com>
 2019-06-14 18:35:57 +02:00
Jason A. Donenfeld
eaf17becfa global: fixup TODO comment spacing 2019-06-06 23:00:15 +02:00
Jason A. Donenfeld
3bf41b06ae global: regroup all imports 2019-05-14 09:09:52 +02:00
Jason A. Donenfeld
d024393335 tun: darwin: write routeSocket variable in helper 
Otherwise the race detector "complains".
 2019-04-19 07:53:19 +09:00
Jason A. Donenfeld
6440f010ee receive: implement flush semantics 2019-03-21 14:45:41 -06:00
Jason A. Donenfeld
68f0721c6a tun: import mobile particularities 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld
967d1a0f3d tun: allow special methods in NativeTun 2019-03-01 00:05:57 +01:00
Jason A. Donenfeld
366cbd11a4 tun: use netpoll instead of rwcancel 
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")
}
 2019-02-27 01:52:55 +01:00
Jason A. Donenfeld
ab0f442daf tun: use sysconn instead of .Fd with Go 1.12 2019-02-27 01:34:11 +01:00
Jason A. Donenfeld
42c6d0e261 Change package path 2019-02-18 05:11:39 +01:00
Jason A. Donenfeld
dff424baf8 Update copyright 2019-02-05 12:59:42 +01:00
Jason A. Donenfeld
276bf973e8 Use darwin tun on ios 2018-11-06 16:24:35 +01:00
Jason A. Donenfeld
2e772194cf tun: only call .Fd() once 
Doing so tends to make the tunnel blocking, so we only retrieve it once
before we call SetNonblock, and then cache the result.
 2018-10-17 21:31:42 +02:00
Jason A. Donenfeld
5be541d147 global: fix up copyright headers 2018-09-16 18:49:19 +02:00
Jason A. Donenfeld
0ba551807f Do not build tun device on ios 2018-06-09 03:31:17 +02:00
Jason A. Donenfeld
2f2eca8947 Catch EINTR 2018-05-24 15:36:29 +02:00
Jason A. Donenfeld
588b9f01ae Adopt GOPATH 
GOPATH is annoying, but the Go community pushing me to adopt it is even
more annoying.
 2018-05-23 05:18:13 +02:00
Jason A. Donenfeld
0a63188afa Move tun to subpackage 2018-05-23 03:58:27 +02:00