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authorJason A. Donenfeld <Jason@zx2c4.com>2019-08-21 08:40:44 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2019-08-21 09:16:12 +0200
commit68fea631d8e97aa7395b944916e569cf66553e73 (patch)
tree5ebd8d7c0227fd1b59cf961328814335f024060d /tun/wintun/nci
parentef23100a4f86948e0466dce980d8604ad95f13df (diff)
wintun: use nci.dll directly instead of buggy netshell
Diffstat (limited to 'tun/wintun/nci')
-rw-r--r--tun/wintun/nci/mksyscall.go8
-rw-r--r--tun/wintun/nci/nci_windows.go28
-rw-r--r--tun/wintun/nci/zsyscall_windows.go60
3 files changed, 96 insertions, 0 deletions
diff --git a/tun/wintun/nci/mksyscall.go b/tun/wintun/nci/mksyscall.go
new file mode 100644
index 0000000..15408f4
--- /dev/null
+++ b/tun/wintun/nci/mksyscall.go
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package nci
+
+//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go nci_windows.go
diff --git a/tun/wintun/nci/nci_windows.go b/tun/wintun/nci/nci_windows.go
new file mode 100644
index 0000000..9dc6699
--- /dev/null
+++ b/tun/wintun/nci/nci_windows.go
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package nci
+
+import "golang.org/x/sys/windows"
+
+//sys nciSetConnectionName(guid *windows.GUID, newName *uint16) (ret error) = nci.NciSetConnectionName
+//sys nciGetConnectionName(guid *windows.GUID, destName *uint16, inDestNameBytes uint32, outDestNameBytes *uint32) (ret error) = nci.NciGetConnectionName
+
+func SetConnectionName(guid *windows.GUID, newName string) error {
+ newName16, err := windows.UTF16PtrFromString(newName)
+ if err != nil {
+ return err
+ }
+ return nciSetConnectionName(guid, newName16)
+}
+
+func ConnectionName(guid *windows.GUID) (string, error) {
+ var name [0x400]uint16
+ err := nciGetConnectionName(guid, &name[0], uint32(len(name)*2), nil)
+ if err != nil {
+ return "", err
+ }
+ return windows.UTF16ToString(name[:]), nil
+}
diff --git a/tun/wintun/nci/zsyscall_windows.go b/tun/wintun/nci/zsyscall_windows.go
new file mode 100644
index 0000000..2a7b79e
--- /dev/null
+++ b/tun/wintun/nci/zsyscall_windows.go
@@ -0,0 +1,60 @@
+// Code generated by 'go generate'; DO NOT EDIT.
+
+package nci
+
+import (
+ "syscall"
+ "unsafe"
+
+ "golang.org/x/sys/windows"
+)
+
+var _ unsafe.Pointer
+
+// Do the interface allocations only once for common
+// Errno values.
+const (
+ errnoERROR_IO_PENDING = 997
+)
+
+var (
+ errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+)
+
+// errnoErr returns common boxed Errno values, to prevent
+// allocations at runtime.
+func errnoErr(e syscall.Errno) error {
+ switch e {
+ case 0:
+ return nil
+ case errnoERROR_IO_PENDING:
+ return errERROR_IO_PENDING
+ }
+ // TODO: add more here, after collecting data on the common
+ // error values see on Windows. (perhaps when running
+ // all.bat?)
+ return e
+}
+
+var (
+ modnci = windows.NewLazySystemDLL("nci.dll")
+
+ procNciSetConnectionName = modnci.NewProc("NciSetConnectionName")
+ procNciGetConnectionName = modnci.NewProc("NciGetConnectionName")
+)
+
+func nciSetConnectionName(guid *windows.GUID, newName *uint16) (ret error) {
+ r0, _, _ := syscall.Syscall(procNciSetConnectionName.Addr(), 2, uintptr(unsafe.Pointer(guid)), uintptr(unsafe.Pointer(newName)), 0)
+ if r0 != 0 {
+ ret = syscall.Errno(r0)
+ }
+ return
+}
+
+func nciGetConnectionName(guid *windows.GUID, destName *uint16, inDestNameBytes uint32, outDestNameBytes *uint32) (ret error) {
+ r0, _, _ := syscall.Syscall6(procNciGetConnectionName.Addr(), 4, uintptr(unsafe.Pointer(guid)), uintptr(unsafe.Pointer(destName)), uintptr(inDestNameBytes), uintptr(unsafe.Pointer(outDestNameBytes)), 0, 0)
+ if r0 != 0 {
+ ret = syscall.Errno(r0)
+ }
+ return
+}