snow/wireguard-go
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Author SHA1 Message Date
Simon Rozman 9b22255cad wintun: Refactor network registry key name generation 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-07 21:12:20 +01:00
Simon Rozman 11f5780250 wintun: Revise interface creation wait 
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>
 2019-03-07 21:12:20 +01:00
Jason A. Donenfeld 92f72f5aa6 tun: linux: work out netpoll trick 2019-03-07 01:51:41 +01:00
Simon Rozman 1fdf7b19a3 wintun: Resolve some of golint warnings 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Simon Rozman a1aabb21ae Elaborate the failing step when forwarding errors on return 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Simon Rozman 9041d38e2d Simplify reading NetCfgInstanceId from registry 
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>
 2019-03-04 16:37:11 +01:00
Simon Rozman cddfd9a0d8 Unify interface-specific network registry key open 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld 68f0721c6a tun: import mobile particularities 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld 69f0fe67b6 global: begin modularization 2019-03-03 05:00:40 +01:00
Jason A. Donenfeld d435be35ca tun: windows: expose GUID 2019-03-01 00:11:12 +01:00
Jason A. Donenfeld 967d1a0f3d tun: allow special methods in NativeTun 2019-03-01 00:05:57 +01:00
Jason A. Donenfeld 88ff67fb6f tun: linux: netpoll is broken for tun's epoll 
So this mostly reverts the switch to Sysconn for Linux.

Issue: https://github.com/golang/go/issues/30426
 2019-02-27 04:38:26 +01:00
Jason A. Donenfeld 971be13e77 tun: linux: netlink sock needs cleaning up but file will be gc'd 2019-02-27 04:11:41 +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
Simon Rozman d002eff155 wintun: Read/write packet size from/to exchange buffer directly 
Driver <-> user-space communication is local and using native endian.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-22 16:16:14 +01:00
Simon Rozman e06a8f8f9f wintun: Make two-step slicing a one step 
Stop relying to Go compiler optimizations and calculate the end offset
directly.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-22 16:11:33 +01:00
Simon Rozman ac4944a708 wintun: Write exchange buffer increased back to 1MiB 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 20:13:33 +01:00
Simon Rozman 2491f9d454 wintun: Migrate from unsafe buffer handling to encoding/binary 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 20:10:24 +01:00
Simon Rozman 8091c6474a wintun: Adopt new packet data alignment 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 19:56:10 +01:00
Simon Rozman 040da43889 wintun: Cleanup 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 18:38:18 +01:00
Simon Rozman b7025b5627 wintun: Add TUN device locking 
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>
 2019-02-20 13:12:08 +01:00
Simon Rozman 6581cfb885 wintun: Move exchange buffer in separate struct on heap 
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>
 2019-02-20 11:41:37 +01:00
Simon Rozman 4863089120 wintun: Switch to dynamic packet sizes 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-19 18:50:42 +01:00
Jason A. Donenfeld 42c6d0e261 Change package path 2019-02-18 05:11:39 +01:00
Simon Rozman b719a09a26 wintun: Auto-calculate TUN exchange buffer size 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-08 15:21:24 +01:00
Simon Rozman f05f52637f wintun: Simplify Read method() 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-08 14:31:05 +01:00
Simon Rozman 713477cfb1 wintun: Make constants private and adopt Go recommended case 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-08 08:55:23 +01:00
Simon Rozman 5981d5cacf wintun: Check for user close in read loop regardless the load 
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>
 2019-02-08 08:48:35 +01:00
Simon Rozman b13739ada2 wintun: Adjust tunRWQueue.left member to match Wintun driver 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-08 07:32:12 +01:00
Simon Rozman c4988999ac setupapi: Merge _SP_DRVINFO_DETAIL_DATA and DrvInfoDetailData 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:50:43 +01:00
Simon Rozman b662896cf4 setupapi: Merge SP_DRVINFO_DATA and DrvInfoData 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:50:43 +01:00
Simon Rozman 0525f6b112 setupapi: Rename SP_REMOVEDEVICE_PARAMS to RemoveDeviceParams 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:50:43 +01:00
Simon Rozman 9d830826c5 setupapi: Rename SP_CLASSINSTALL_HEADER to ClassInstallHeader 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:50:43 +01:00
Simon Rozman bd963497da setupapi: Merge _SP_DEVINSTALL_PARAMS and DevInstallParams 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:50:30 +01:00
Simon Rozman 05d25fd1b7 setupapi: Merge _SP_DEVINFO_LIST_DETAIL_DATA and DevInfoListDetailData 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 23:49:50 +01:00
Simon Rozman 6d2729dccc setupapi: Rename SP_DEVINFO_DATA to DevInfoData 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 22:43:02 +01:00
Simon Rozman d87cbeeb2f wintun: Detect if a foreign interface with the same name exists 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 22:02:51 +01:00
Simon Rozman 043b7e8013 wintun: Clean excessive setupapi.DevInfo.GetDeviceInfoListDetail() call 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 20:49:41 +01:00
Simon Rozman ef48d4fa95 wintun: Explain rationale behind case-insensitive interface names 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 19:42:59 +01:00
Simon Rozman f7276ed522 wintun: Implement TODO in TestSetupDiGetDeviceRegistryProperty() 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-07 18:59:34 +01:00
Jason A. Donenfeld c4b43e35a7 wintun: add FlushInterface stub 2019-02-07 18:24:28 +01:00
Jason A. Donenfeld fac1fbcd72 wintun: Compare values of GUID, not pointers, when removing 2019-02-07 04:49:15 +01:00
Jason A. Donenfeld ea59177f1c wintun: Introduce new package for obscuring Windows bits 2019-02-07 04:39:59 +01:00
Jason A. Donenfeld 306d08e692 tun_windows: Style 2019-02-07 04:08:05 +01:00
Simon Rozman cb2bc4b34c tun_windows: Introduce preliminary TUN interface creation 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-06 22:30:14 +01:00
Simon Rozman 46279ad0f9 tun_windows: Stop checking minimum size of received TUN packets 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-06 20:22:04 +01:00
Jason A. Donenfeld c599bf9497 Fix up errors and paths 2019-02-05 22:06:25 +09:00
Jason A. Donenfeld 6f76edd045 Import windows scafolding 2019-02-05 12:59:42 +01:00
Jason A. Donenfeld dff424baf8 Update copyright 2019-02-05 12:59:42 +01:00