go.mod: upgrade wireguard-windows, de-fork wireguard-go

Pull in the latest version of wireguard-windows.

Switch to upstream wireguard-go.
This requires reverting all of our import paths.

Unfortunately, this has to happen at the same time.
The wireguard-go change is very low risk,
as that commit matches our fork almost exactly.
(The only changes are import paths, CI files, and a go.mod entry.)
So if there are issues as a result of this commit,
the first place to look is wireguard-windows changes.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>

wgengine/bench/wg.go

@@ -12,7 +12,7 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 
 	"tailscale.com/net/dns"

wgengine/magicsock/legacy.go

@@ -16,11 +16,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/tailscale/wireguard-go/conn"
-	"github.com/tailscale/wireguard-go/tai64n"
 	"golang.org/x/crypto/blake2s"
 	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/crypto/poly1305"
+	"golang.zx2c4.com/wireguard/conn"
+	"golang.zx2c4.com/wireguard/tai64n"
 	"inet.af/netaddr"
 	"tailscale.com/ipn/ipnstate"
 	"tailscale.com/types/key"

wgengine/magicsock/magicsock.go

@@ -27,9 +27,9 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/tailscale/wireguard-go/conn"
 	"golang.org/x/crypto/nacl/box"
 	"golang.org/x/time/rate"
+	"golang.zx2c4.com/wireguard/conn"
 	"inet.af/netaddr"
 	"tailscale.com/control/controlclient"
 	"tailscale.com/derp"

wgengine/magicsock/magicsock_test.go

@@ -26,9 +26,9 @@ import (
 	"time"
 	"unsafe"
 
-	"github.com/tailscale/wireguard-go/device"
-	"github.com/tailscale/wireguard-go/tun/tuntest"
 	"golang.org/x/crypto/nacl/box"
+	"golang.zx2c4.com/wireguard/device"
+	"golang.zx2c4.com/wireguard/tun/tuntest"
 	"inet.af/netaddr"
 	"tailscale.com/derp"
 	"tailscale.com/derp/derphttp"

wgengine/mem_ios.go

@@ -5,7 +5,7 @@
 package wgengine
 
 import (
-	"github.com/tailscale/wireguard-go/device"
+	"golang.zx2c4.com/wireguard/device"
 )
 
 // iOS has a very restrictive memory limit on network extensions.

wgengine/router/ifconfig_windows.go

@@ -17,8 +17,8 @@ import (
 
 	"github.com/go-multierror/multierror"
 	ole "github.com/go-ole/go-ole"
-	"github.com/tailscale/wireguard-go/tun"
 	"golang.org/x/sys/windows"
+	"golang.zx2c4.com/wireguard/tun"
 	"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
 	"inet.af/netaddr"
 	"tailscale.com/health"

wgengine/router/router.go

@@ -7,7 +7,7 @@
 package router
 
 import (
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/types/logger"
 	"tailscale.com/types/preftype"

wgengine/router/router_darwin.go

@@ -5,7 +5,7 @@
 package router
 
 import (
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"tailscale.com/types/logger"
 )
 

wgengine/router/router_default.go

@@ -7,7 +7,7 @@
 package router
 
 import (
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"tailscale.com/types/logger"
 )
 

wgengine/router/router_freebsd.go

@@ -5,7 +5,7 @@
 package router
 
 import (
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"tailscale.com/types/logger"
 )
 

wgengine/router/router_linux.go

@@ -16,7 +16,7 @@ import (
 
 	"github.com/coreos/go-iptables/iptables"
 	"github.com/go-multierror/multierror"
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/net/tsaddr"
 	"tailscale.com/types/logger"

wgengine/router/router_linux_test.go

@@ -16,7 +16,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 )
 

wgengine/router/router_openbsd.go

@@ -10,7 +10,7 @@ import (
 	"log"
 	"os/exec"
 
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/types/logger"
 )

wgengine/router/router_userspace_bsd.go

@@ -12,7 +12,7 @@ import (
 	"os/exec"
 	"runtime"
 
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/net/tsaddr"
 	"tailscale.com/types/logger"

wgengine/router/router_windows.go

@@ -16,8 +16,8 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/tailscale/wireguard-go/tun"
 	"golang.org/x/sys/windows"
+	"golang.zx2c4.com/wireguard/tun"
 	"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
 	"inet.af/netaddr"
 	"tailscale.com/logtail/backoff"

wgengine/userspace.go

@@ -20,9 +20,9 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/tailscale/wireguard-go/device"
-	"github.com/tailscale/wireguard-go/tun"
 	"go4.org/mem"
+	"golang.zx2c4.com/wireguard/device"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/control/controlclient"
 	"tailscale.com/health"

wgengine/userspace_ext_test.go

@@ -7,7 +7,7 @@ package wgengine_test
 import (
 	"testing"
 
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/tun"
 	"tailscale.com/net/tstun"
 	"tailscale.com/types/logger"
 	"tailscale.com/wgengine"

wgengine/wgcfg/device.go

@@ -8,7 +8,7 @@ import (
 	"io"
 	"sort"
 
-	"github.com/tailscale/wireguard-go/device"
+	"golang.zx2c4.com/wireguard/device"
 	"tailscale.com/types/logger"
 )
 

wgengine/wgcfg/device_test.go

@@ -16,9 +16,9 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/tailscale/wireguard-go/conn"
-	"github.com/tailscale/wireguard-go/device"
-	"github.com/tailscale/wireguard-go/tun"
+	"golang.zx2c4.com/wireguard/conn"
+	"golang.zx2c4.com/wireguard/device"
+	"golang.zx2c4.com/wireguard/tun"
 	"inet.af/netaddr"
 	"tailscale.com/types/wgkey"
 )

wgengine/wglog/wglog.go

@@ -12,7 +12,7 @@ import (
 	"sync"
 	"sync/atomic"
 
-	"github.com/tailscale/wireguard-go/device"
+	"golang.zx2c4.com/wireguard/device"
 	"tailscale.com/types/logger"
 	"tailscale.com/types/wgkey"
 	"tailscale.com/wgengine/wgcfg"