diff options
author | Simon Rozman <simon@rozman.si> | 2020-11-06 05:24:50 +0100 |
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committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2020-11-07 15:20:49 +0100 |
commit | 65e03a918274534015ca189bfadc33cbba9e3ec8 (patch) | |
tree | a7b84f08e1602324f22bf857ca9148194562e923 /tun/wintun/resource/zsyscall_windows.go | |
parent | 3e08b8aee0f6ae038f6316ca1bb84e5214db318f (diff) |
wintun: load wintun.dll from RCDATA resource
Signed-off-by: Simon Rozman <simon@rozman.si>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'tun/wintun/resource/zsyscall_windows.go')
-rw-r--r-- | tun/wintun/resource/zsyscall_windows.go | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/tun/wintun/resource/zsyscall_windows.go b/tun/wintun/resource/zsyscall_windows.go new file mode 100644 index 0000000..e4c4bf1 --- /dev/null +++ b/tun/wintun/resource/zsyscall_windows.go @@ -0,0 +1,112 @@ +// Code generated by 'go generate'; DO NOT EDIT. + +package resource + +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 ( + modkernel32 = windows.NewLazySystemDLL("kernel32.dll") + modversion = windows.NewLazySystemDLL("version.dll") + + procFindResourceW = modkernel32.NewProc("FindResourceW") + procSizeofResource = modkernel32.NewProc("SizeofResource") + procLoadResource = modkernel32.NewProc("LoadResource") + procLockResource = modkernel32.NewProc("LockResource") + procVerQueryValueW = modversion.NewProc("VerQueryValueW") +) + +func findResource(module windows.Handle, name *uint16, resType *uint16) (resInfo windows.Handle, err error) { + r0, _, e1 := syscall.Syscall(procFindResourceW.Addr(), 3, uintptr(module), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(resType))) + resInfo = windows.Handle(r0) + if resInfo == 0 { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return +} + +func sizeofResource(module windows.Handle, resInfo windows.Handle) (size uint32, err error) { + r0, _, e1 := syscall.Syscall(procSizeofResource.Addr(), 2, uintptr(module), uintptr(resInfo), 0) + size = uint32(r0) + if size == 0 { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return +} + +func loadResource(module windows.Handle, resInfo windows.Handle) (resData windows.Handle, err error) { + r0, _, e1 := syscall.Syscall(procLoadResource.Addr(), 2, uintptr(module), uintptr(resInfo), 0) + resData = windows.Handle(r0) + if resData == 0 { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return +} + +func lockResource(resData windows.Handle) (addr uintptr, err error) { + r0, _, e1 := syscall.Syscall(procLockResource.Addr(), 1, uintptr(resData), 0, 0) + addr = uintptr(r0) + if addr == 0 { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return +} + +func verQueryValue(block *byte, section *uint16, value **byte, size *uint32) (err error) { + r1, _, e1 := syscall.Syscall6(procVerQueryValueW.Addr(), 4, uintptr(unsafe.Pointer(block)), uintptr(unsafe.Pointer(section)), uintptr(unsafe.Pointer(value)), uintptr(unsafe.Pointer(size)), 0, 0) + if r1 == 0 { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return +} |