[ovs-dev] [PATCH V4 1/5] Python tests: Add winutils.py module
Guru Shetty
guru at ovn.org
Tue Jan 3 21:07:38 UTC 2017
On 3 January 2017 at 12:10, Alin Balutoiu <abalutoiu at cloudbasesolutions.com>
wrote:
> From: Alin Balutoiu <abalutoiu at cloudbasesolutions.com>
>
> This patch adds a new python module which contains
> helper functions. These will be neccessary for the
> Windows implementation.
>
> They cover the following aspects: sockets and namedpipes.
>
> Signed-off-by: Alin-Gheorghe Balutoiu <abalutoiu at cloudbasesolutions.com>
>
I changed your Signed-off-by to the previous version and applied the series.
> Acked-by: Alin Gabriel Serdean <aserdean at cloudbasesolutions>
> ---
> V2: No changes.
> V3: Changed Signed-off-by name and added previous Acked-by's.
> V4: Fixed typo and included myself in the AUTHORS file.
> ---
> AUTHORS.rst | 1 +
> python/automake.mk | 3 +-
> python/ovs/winutils.py | 226 ++++++++++++++++++++++++++++++
> +++++++++++++++++++
> 3 files changed, 229 insertions(+), 1 deletion(-)
> create mode 100644 python/ovs/winutils.py
>
> diff --git a/AUTHORS.rst b/AUTHORS.rst
> index d30511a..1efb332 100644
> --- a/AUTHORS.rst
> +++ b/AUTHORS.rst
> @@ -39,6 +39,7 @@ Alexei Starovoitov ast at plumgrid.com
> Alexey I. Froloff raorn at raorn.name
> Alex Wang ee07b291 at gmail.com
> Alfredo Finelli alf at computationes.de
> +Alin Balutoiu abalutoiu at cloudbasesolutions.com
> Alin Serdean aserdean at cloudbasesolutions.com
> Ambika Arora ambika.arora at tcs.com
> Amit Bose bose at noironetworks.com
> diff --git a/python/automake.mk b/python/automake.mk
> index 1c8fa38..e417483 100644
> --- a/python/automake.mk
> +++ b/python/automake.mk
> @@ -34,7 +34,8 @@ ovs_pyfiles = \
> python/ovs/unixctl/server.py \
> python/ovs/util.py \
> python/ovs/version.py \
> - python/ovs/vlog.py
> + python/ovs/vlog.py \
> + python/ovs/winutils.py
>
> # These python files are used at build time but not runtime,
> # so they are not installed.
> diff --git a/python/ovs/winutils.py b/python/ovs/winutils.py
> new file mode 100644
> index 0000000..3a235f8
> --- /dev/null
> +++ b/python/ovs/winutils.py
> @@ -0,0 +1,226 @@
> +# Copyright (c) 2016 Cloudbase Solutions Srl
> +#
> +# Licensed under the Apache License, Version 2.0 (the "License");
> +# you may not use this file except in compliance with the License.
> +# You may obtain a copy of the License at:
> +#
> +# http://www.apache.org/licenses/LICENSE-2.0
> +#
> +# Unless required by applicable law or agreed to in writing, software
> +# distributed under the License is distributed on an "AS IS" BASIS,
> +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> +# See the License for the specific language governing permissions and
> +# limitations under the License.
> +
> +import six
> +import sys
> +
> +if sys.platform != 'win32':
> + raise Exception("Intended to use only on Windows")
> +else:
> + import pywintypes
> + import winerror
> + import win32pipe
> + import win32con
> + import win32security
> + import win32file
> + import win32event
> +
> +
> +def close_handle(handle, logger=None):
> + try:
> + win32file.CloseHandle(handle)
> + return None
> + except pywintypes.error as e:
> + if logger is not None:
> + logger("failed to close handle: %s" % e.strerror)
> + return e.winerror
> +
> +
> +def windows_create_pipe(sAttrs=-1, nSize=None):
> + # Default values if parameters are not passed
> + if sAttrs == -1:
> + sAttrs = win32security.SECURITY_ATTRIBUTES()
> + sAttrs.bInheritHandle = 1
> + if nSize is None:
> + # If this parameter is zero, the system uses the default buffer
> size.
> + nSize = 0
> +
> + try:
> + (read_pipe, write_pipe) = win32pipe.CreatePipe(sAttrs, nSize)
> + except pywintypes.error:
> + raise
> +
> + return (read_pipe, write_pipe)
> +
> +
> +def windows_read_pipe(fd, length):
> + try:
> + (error, data) = win32file.ReadFile(fd, length)
> + return error, data
> + except pywintypes.error as e:
> + return e.winerror, ""
> +
> +
> +def create_file(filename, desiredAccess=None, shareMode=None,
> attributes=-1,
> + CreationDisposition=None, flagsAndAttributes=None,
> + hTemplateFile=-1):
> + # Default values if parameters are not passed
> + if desiredAccess is None:
> + desiredAccess = win32file.GENERIC_READ | win32file.GENERIC_WRITE
> + if shareMode is None:
> + shareMode = 0
> + if attributes == -1:
> + # attributes can be None
> + attributes = None
> + if CreationDisposition is None:
> + CreationDisposition = win32file.OPEN_EXISTING
> + if flagsAndAttributes is None:
> + flagsAndAttributes = (win32file.FILE_ATTRIBUTE_NORMAL |
> + win32file.FILE_FLAG_OVERLAPPED |
> + win32file.FILE_FLAG_NO_BUFFERING)
> + if hTemplateFile == -1:
> + hTemplateFile = None
> +
> + try:
> + npipe = win32file.CreateFile(filename,
> + desiredAccess,
> + shareMode,
> + attributes,
> + CreationDisposition,
> + flagsAndAttributes,
> + hTemplateFile)
> + except pywintypes.error:
> + raise
> + return npipe
> +
> +
> +def write_file(handle, data, overlapped=None):
> + try:
> + (errCode, nBytesWritten) = win32file.WriteFile(handle,
> + data,
> + overlapped)
> + # Note: win32file.WriteFile doesn't throw an exception
> + # in case it receives ERROR_IO_PENDING.
> + return (errCode, nBytesWritten)
> + except pywintypes.error as e:
> + return (e.winerror, 0)
> +
> +
> +def read_file(handle, bufsize, overlapped=None):
> + try:
> + # Note: win32file.ReadFile doesn't throw an exception
> + # in case it receives ERROR_IO_PENDING.
> + (errCode, read_buffer) = win32file.ReadFile(
> + handle, bufsize, overlapped)
> + return (errCode, read_buffer)
> + except pywintypes.error as e:
> + return (e.winerror, "")
> +
> +
> +def create_named_pipe(pipename, openMode=None, pipeMode=None,
> + nMaxInstances=None, nOutBufferSize=None,
> + nInBufferSize=None, nDefaultTimeOut=None,
> + saAttr=-1):
> + # Default values if parameters are not passed
> + if openMode is None:
> + openMode = win32con.PIPE_ACCESS_DUPLEX |
> win32con.FILE_FLAG_OVERLAPPED
> + if pipeMode is None:
> + pipeMode = (win32con.PIPE_TYPE_MESSAGE |
> + win32con.PIPE_READMODE_BYTE |
> + win32con.PIPE_WAIT)
> + if nMaxInstances is None:
> + nMaxInstances = 64
> + if nOutBufferSize is None:
> + nOutBufferSize = 65000
> + if nInBufferSize is None:
> + nInBufferSize = 65000
> + if nDefaultTimeOut is None:
> + nDefaultTimeOut = 0
> + if saAttr == -1:
> + # saAttr can be None
> + saAttr = win32security.SECURITY_ATTRIBUTES()
> + saAttr.bInheritHandle = 1
> +
> + try:
> + npipe = win32pipe.CreateNamedPipe(pipename,
> + openMode,
> + pipeMode,
> + nMaxInstances,
> + nOutBufferSize,
> + nInBufferSize,
> + nDefaultTimeOut,
> + saAttr)
> +
> + if npipe == win32file.INVALID_HANDLE_VALUE:
> + return None
> +
> + return npipe
> + except pywintypes.error:
> + return None
> +
> +
> +def set_pipe_mode(hPipe, mode=-1, maxCollectionCount=None,
> + collectDataTimeout=None):
> + # Default values if parameters are not passed
> + if mode == -1:
> + mode = win32pipe.PIPE_READMODE_BYTE
> + try:
> + win32pipe.SetNamedPipeHandleState(
> + hPipe, mode, maxCollectionCount, collectDataTimeout)
> + except pywintypes.error:
> + raise
> +
> +
> +def connect_named_pipe(pipe_handle, overlapped=None):
> + try:
> + # If the result of ConnectNamedPipe is ERROR_IO_PENDING or
> + # ERROR_PIPE_CONNECTED, then this value is returned.
> + # All other error values raise a win32 exception
> + error = win32pipe.ConnectNamedPipe(pipe_handle, overlapped)
> + return error
> + except pywintypes.error as e:
> + return e.winerror
> +
> +
> +def get_pipe_name(name):
> + name = name.replace('/', '')
> + name = name.replace('\\', '')
> + name = "\\\\.\\pipe\\" + name
> + return name
> +
> +
> +def get_overlapped_result(handle, overlapped=None, bWait=False):
> + try:
> + return win32file.GetOverlappedResult(handle, overlapped, bWait)
> + except pywintypes.error:
> + raise
> +
> +
> +def get_decoded_buffer(recvBuffer):
> + if six.PY3:
> + return bytes(recvBuffer).decode("utf-8")
> + else:
> + return str(recvBuffer)
> +
> +
> +def get_encoded_buffer(buff):
> + # Python 3 has separate types for strings and bytes.
> + # We must have bytes here.
> + if not isinstance(buff, six.binary_type):
> + if six.PY3:
> + buff = six.binary_type(buff, 'utf-8')
> + else:
> + buff = six.binary_type(buff)
> + return buff
> +
> +
> +def get_new_event(sa=None, bManualReset=True, bInitialState=True,
> + objectName=None):
> + return win32event.CreateEvent(sa, bManualReset, bInitialState,
> objectName)
> +
> +
> +pipe_disconnected_errors = [winerror.ERROR_PIPE_NOT_CONNECTED,
> + winerror.ERROR_BAD_PIPE,
> + winerror.ERROR_NO_DATA,
> + winerror.ERROR_BROKEN_PIPE]
> --
> 2.10.0.windows.1
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