updater: use winhttp to reduce filesize

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/updater/winhttp/zsyscall_windows.go b/updater/winhttp/zsyscall_windows.go
new file mode 100644
index 00000000..ba8e3e83
--- /dev/null
+++ b/updater/winhttp/zsyscall_windows.go
@@ -0,0 +1,189 @@
+// Code generated by 'go generate'; DO NOT EDIT.
+
+package winhttp
+
+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 (
+	modwinhttp = windows.NewLazySystemDLL("winhttp.dll")
+
+	procWinHttpOpen               = modwinhttp.NewProc("WinHttpOpen")
+	procWinHttpSetStatusCallback  = modwinhttp.NewProc("WinHttpSetStatusCallback")
+	procWinHttpCloseHandle        = modwinhttp.NewProc("WinHttpCloseHandle")
+	procWinHttpConnect            = modwinhttp.NewProc("WinHttpConnect")
+	procWinHttpOpenRequest        = modwinhttp.NewProc("WinHttpOpenRequest")
+	procWinHttpSendRequest        = modwinhttp.NewProc("WinHttpSendRequest")
+	procWinHttpReceiveResponse    = modwinhttp.NewProc("WinHttpReceiveResponse")
+	procWinHttpQueryHeaders       = modwinhttp.NewProc("WinHttpQueryHeaders")
+	procWinHttpQueryDataAvailable = modwinhttp.NewProc("WinHttpQueryDataAvailable")
+	procWinHttpReadData           = modwinhttp.NewProc("WinHttpReadData")
+	procWinHttpCrackUrl           = modwinhttp.NewProc("WinHttpCrackUrl")
+)
+
+func winHttpOpen(userAgent *uint16, accessType uint32, proxy *uint16, proxyBypass *uint16, flags uint32) (sessionHandle _HINTERNET, err error) {
+	r0, _, e1 := syscall.Syscall6(procWinHttpOpen.Addr(), 5, uintptr(unsafe.Pointer(userAgent)), uintptr(accessType), uintptr(unsafe.Pointer(proxy)), uintptr(unsafe.Pointer(proxyBypass)), uintptr(flags), 0)
+	sessionHandle = _HINTERNET(r0)
+	if sessionHandle == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpSetStatusCallback(handle _HINTERNET, callback uintptr, notificationFlags uint32, reserved uintptr) (previousCallback uintptr, err error) {
+	r0, _, e1 := syscall.Syscall6(procWinHttpSetStatusCallback.Addr(), 4, uintptr(handle), uintptr(callback), uintptr(notificationFlags), uintptr(reserved), 0, 0)
+	previousCallback = uintptr(r0)
+	if previousCallback == _WINHTTP_INVALID_STATUS_CALLBACK {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpCloseHandle(handle _HINTERNET) (err error) {
+	r1, _, e1 := syscall.Syscall(procWinHttpCloseHandle.Addr(), 1, uintptr(handle), 0, 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpConnect(sessionHandle _HINTERNET, serverName *uint16, serverPort uint16, reserved uint32) (handle _HINTERNET, err error) {
+	r0, _, e1 := syscall.Syscall6(procWinHttpConnect.Addr(), 4, uintptr(sessionHandle), uintptr(unsafe.Pointer(serverName)), uintptr(serverPort), uintptr(reserved), 0, 0)
+	handle = _HINTERNET(r0)
+	if handle == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpOpenRequest(connectHandle _HINTERNET, verb *uint16, objectName *uint16, version *uint16, referrer *uint16, acceptTypes **uint16, flags uint32) (requestHandle _HINTERNET, err error) {
+	r0, _, e1 := syscall.Syscall9(procWinHttpOpenRequest.Addr(), 7, uintptr(connectHandle), uintptr(unsafe.Pointer(verb)), uintptr(unsafe.Pointer(objectName)), uintptr(unsafe.Pointer(version)), uintptr(unsafe.Pointer(referrer)), uintptr(unsafe.Pointer(acceptTypes)), uintptr(flags), 0, 0)
+	requestHandle = _HINTERNET(r0)
+	if requestHandle == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpSendRequest(requestHandle _HINTERNET, headers *uint16, headersLength uint32, optional *byte, optionalLength uint32, totalLength uint32, context uintptr) (err error) {
+	r1, _, e1 := syscall.Syscall9(procWinHttpSendRequest.Addr(), 7, uintptr(requestHandle), uintptr(unsafe.Pointer(headers)), uintptr(headersLength), uintptr(unsafe.Pointer(optional)), uintptr(optionalLength), uintptr(totalLength), uintptr(context), 0, 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpReceiveResponse(requestHandle _HINTERNET, reserved uintptr) (err error) {
+	r1, _, e1 := syscall.Syscall(procWinHttpReceiveResponse.Addr(), 2, uintptr(requestHandle), uintptr(reserved), 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpQueryHeaders(requestHandle _HINTERNET, infoLevel uint32, name *uint16, buffer unsafe.Pointer, bufferLen *uint32, index *uint32) (err error) {
+	r1, _, e1 := syscall.Syscall6(procWinHttpQueryHeaders.Addr(), 6, uintptr(requestHandle), uintptr(infoLevel), uintptr(unsafe.Pointer(name)), uintptr(buffer), uintptr(unsafe.Pointer(bufferLen)), uintptr(unsafe.Pointer(index)))
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpQueryDataAvailable(requestHandle _HINTERNET, bytesAvailable *uint32) (err error) {
+	r1, _, e1 := syscall.Syscall(procWinHttpQueryDataAvailable.Addr(), 2, uintptr(requestHandle), uintptr(unsafe.Pointer(bytesAvailable)), 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpReadData(requestHandle _HINTERNET, buffer *byte, bufferSize uint32, bytesRead *uint32) (err error) {
+	r1, _, e1 := syscall.Syscall6(procWinHttpReadData.Addr(), 4, uintptr(requestHandle), uintptr(unsafe.Pointer(buffer)), uintptr(bufferSize), uintptr(unsafe.Pointer(bytesRead)), 0, 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func winHttpCrackUrl(url *uint16, urlSize uint32, flags uint32, components *_URL_COMPONENTS) (err error) {
+	r1, _, e1 := syscall.Syscall6(procWinHttpCrackUrl.Addr(), 4, uintptr(unsafe.Pointer(url)), uintptr(urlSize), uintptr(flags), uintptr(unsafe.Pointer(components)), 0, 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}