diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 0000000..8b5b6b7
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,60 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
+
+name: CI
+
+on:
+ push:
+
+jobs:
+ docker_build:
+ runs-on: ubuntu-latest
+ permissions:
+ contents: write
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v4
+ - name: Install poetry
+ run: pip install poetry
+ - name: Get version number
+ id: get-version
+ run: echo "version=$(poetry version -s)" >> $GITHUB_OUTPUT
+ - name: Build Wheel
+ run: poetry build -f wheel -o docker
+ - name: Build docker
+ uses: docker/build-push-action@v5
+ with:
+ context: docker
+ build-args: MODULE_VERSION=${{ steps.get-version.outputs.version }}
+ tags: opc-ua-log-fetcher:${{ steps.get-version.outputs.version }}
+ load: true
+ - name: Save results
+ run: docker save opc-ua-log-fetcher:${{ steps.get-version.outputs.version }} | gzip > opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.tar.gz
+ - name: Prepare release
+ run: zip opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip COPYING LICENSE opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.tar.gz
+ - name: Save as artifact
+ uses: actions/upload-artifact@v4
+ with:
+ name: opc-ua-log-fetcher
+ path: opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip
+ if-no-files-found: error
+ - name: Release
+ if: startsWith(github.ref, 'refs/tags/')
+ uses: softprops/action-gh-release@v1
+ with:
+ files: opc-ua-log-fetcher-${{ steps.get-version.outputs.version }}.docker.zip
+ fail_on_unmatched_files: true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b229f88
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+venv/
+.idea
+__pycache__/
+dist/
+.vscode/
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..a9959b3
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is loosely based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0](https://source.cs-clab.net/cyber4de/opc-ua-module/-/tags/1.0.0)
+## Features
+* Initial Release
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..7262050
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,16 @@
+OPC-UA Log Fetcher
+
+Copyright (C) 2023 Airbus CyberSecurity SAS
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see .
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6485dc5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,105 @@
+# OPC-UA Log Fetcher
+
+## License
+
+OPC-UA Log Fetcher
+
+Copyright (C) 2023 Airbus CyberSecurity SAS
+
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+### Third-party software usage
+
+This program uses the following software to run:
+
+| Software | Version | Copyright | License |
+|-|-|-|-|
+| opcua-asyncio (asyncua) | ^1.0.0 | 2023 FreeOpcUa | LGPL-3.0-or-later |
+| rfc5424-logging-handler | ^1.4.3 | 2017 Joris Beckers | BSD-3-Clause |
+
+
+## Command cheatsheet
+
+This project requires poetry (https://python-poetry.org/docs/#installing-with-the-official-installer).
+
+### Install dependencies
+```
+poetry install
+```
+
+### Set the VERSION number variable
+```
+VERSION=$(poetry version --short) && echo ${VERSION}
+```
+
+### Build
+
+Build the python package:
+```
+poetry build
+```
+The package will be in directory `dist`.
+Then build the docker:
+```
+docker build --file docker/Dockerfile --tag opc-ua-log-fetcher:${VERSION} .
+```
+
+#### Archive the docker image
+```
+docker save opc-ua-log-fetcher:${VERSION} | gzip > opc-ua-log-fetcher-${VERSION}.docker.tar.gz
+```
+
+To import the image:
+```
+docker load --input opc-ua-log-fetcher-${VERSION}.docker.tar.gz
+```
+
+### Execute
+First start your server.
+
+To execute the fetcher:
+```
+docker run --rm --network host --volume /dev/log:/dev/log opc-ua-log-fetcher:${VERSION}
+```
+
+To execute the script with poetry:
+```
+poetry run opc-ua-listen
+poetry run opc-ua-listen --help
+```
+
+#### Security
+
+1. no security at all
+ ```
+ poetry run opc-ua-listen
+ ```
+2. username authentication, no security
+ ```
+ poetry run opc-ua-listen --url opc.tcp://username@localhost:4840/freeopcua/server/
+ ```
+3. no authentication/security-policy SignAndEncrypt
+ ```
+ poetry run opc-ua-listen --private-key ./poc/certificates/peer-private-key-example-1.pem --certificate ./poc/certificates/peer-certificate-example-1.der --server-certificate ./poc/certificates/server-certificate-example.der
+ ```
+4. username authentication, certificates checks and encryption
+ ```
+ poetry run opc-ua-listen --url opc.tcp://username@localhost:4840/freeopcua/server/ --private-key ./poc/certificates/peer-private-key-example-1.pem --certificate ./poc/certificates/peer-certificate-example-1.der --server-certificate ./poc/certificates/server-certificate-example.der
+ ```
+
+### Publish a new version
+
+```
+git tag -s ${VERSION} -m "Release ${VERSION}"
+git push origin --tags
+```
diff --git a/docker/Dockerfile b/docker/Dockerfile
new file mode 100644
index 0000000..94a3c42
--- /dev/null
+++ b/docker/Dockerfile
@@ -0,0 +1,26 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
+
+FROM python:3-alpine
+
+ARG MODULE_VERSION
+COPY opc_ua_module-${MODULE_VERSION}-py3-none-any.whl opc_ua_module-${MODULE_VERSION}-py3-none-any.whl
+RUN pip install opc_ua_module-${MODULE_VERSION}-py3-none-any.whl && rm opc_ua_module-${MODULE_VERSION}-py3-none-any.whl
+
+HEALTHCHECK CMD [ `netstat | grep ESTABLISHED | wc -l` -eq 2 ]
+
+ENTRYPOINT ["opc-ua-listen"]
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..b38e80e
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,249 @@
+# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand.
+
+[[package]]
+name = "aiofiles"
+version = "23.2.1"
+description = "File support for asyncio."
+optional = false
+python-versions = ">=3.7"
+files = [
+ {file = "aiofiles-23.2.1-py3-none-any.whl", hash = "sha256:19297512c647d4b27a2cf7c34caa7e405c0d60b5560618a29a9fe027b18b0107"},
+ {file = "aiofiles-23.2.1.tar.gz", hash = "sha256:84ec2218d8419404abcb9f0c02df3f34c6e0a68ed41072acfb1cef5cbc29051a"},
+]
+
+[[package]]
+name = "aiosqlite"
+version = "0.19.0"
+description = "asyncio bridge to the standard sqlite3 module"
+optional = false
+python-versions = ">=3.7"
+files = [
+ {file = "aiosqlite-0.19.0-py3-none-any.whl", hash = "sha256:edba222e03453e094a3ce605db1b970c4b3376264e56f32e2a4959f948d66a96"},
+ {file = "aiosqlite-0.19.0.tar.gz", hash = "sha256:95ee77b91c8d2808bd08a59fbebf66270e9090c3d92ffbf260dc0db0b979577d"},
+]
+
+[package.extras]
+dev = ["aiounittest (==1.4.1)", "attribution (==1.6.2)", "black (==23.3.0)", "coverage[toml] (==7.2.3)", "flake8 (==5.0.4)", "flake8-bugbear (==23.3.12)", "flit (==3.7.1)", "mypy (==1.2.0)", "ufmt (==2.1.0)", "usort (==1.0.6)"]
+docs = ["sphinx (==6.1.3)", "sphinx-mdinclude (==0.5.3)"]
+
+[[package]]
+name = "asyncua"
+version = "1.0.4"
+description = "Pure Python OPC-UA client and server library"
+optional = false
+python-versions = "*"
+files = [
+ {file = "asyncua-1.0.4-py3-none-any.whl", hash = "sha256:06eabe60862d4b5d68ea3000bc71f649facbb8d6cdd8f97c6c16604cbbbf2a6d"},
+ {file = "asyncua-1.0.4.tar.gz", hash = "sha256:dde453fb759589c2b467f34cb3732a1445b3287a3d65e554418a6f4499b0043a"},
+]
+
+[package.dependencies]
+aiofiles = "*"
+aiosqlite = "*"
+cryptography = "*"
+pyOpenSSL = "*"
+python-dateutil = "*"
+pytz = "*"
+sortedcontainers = "*"
+
+[[package]]
+name = "cffi"
+version = "1.15.1"
+description = "Foreign Function Interface for Python calling C code."
+optional = false
+python-versions = "*"
+files = [
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+[package.extras]
+docs = ["sphinx (>=5.3.0)", "sphinx-rtd-theme (>=1.1.1)"]
+docstest = ["pyenchant (>=1.6.11)", "sphinxcontrib-spelling (>=4.0.1)", "twine (>=1.12.0)"]
+nox = ["nox"]
+pep8test = ["black", "check-sdist", "mypy", "ruff"]
+sdist = ["build"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["pretend", "pytest (>=6.2.0)", "pytest-benchmark", "pytest-cov", "pytest-xdist"]
+test-randomorder = ["pytest-randomly"]
+
+[[package]]
+name = "pycparser"
+version = "2.21"
+description = "C parser in Python"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+files = [
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+[[package]]
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+description = "Python wrapper module around the OpenSSL library"
+optional = false
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+
+[package.extras]
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+test = ["flaky", "pretend", "pytest (>=3.0.1)"]
+
+[[package]]
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+version = "2.8.2"
+description = "Extensions to the standard Python datetime module"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
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+[package.dependencies]
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+
+[[package]]
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+version = "2023.3.post1"
+description = "World timezone definitions, modern and historical"
+optional = false
+python-versions = "*"
+files = [
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+[[package]]
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+description = "Python 2 and 3 compatibility utilities"
+optional = false
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+]
+
+[[package]]
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+version = "2.4.0"
+description = "Sorted Containers -- Sorted List, Sorted Dict, Sorted Set"
+optional = false
+python-versions = "*"
+files = [
+ {file = "sortedcontainers-2.4.0-py2.py3-none-any.whl", hash = "sha256:a163dcaede0f1c021485e957a39245190e74249897e2ae4b2aa38595db237ee0"},
+ {file = "sortedcontainers-2.4.0.tar.gz", hash = "sha256:25caa5a06cc30b6b83d11423433f65d1f9d76c4c6a0c90e3379eaa43b9bfdb88"},
+]
+
+[metadata]
+lock-version = "2.0"
+python-versions = "^3.8"
+content-hash = "5bcd150f94a33ca40db4b6de12333f7942c88e4f8b17ddbdbd50b534aafb55c7"
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..e8ee6a7
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,19 @@
+[tool.poetry]
+name = "opc-ua-module"
+version = "1.0.0"
+description = "OPC-UA log fetcher"
+license = "GPL-3.0-or-later"
+authors = ["Airbus CyberSecurity SAS"]
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = "^3.8"
+asyncua = "^1.0.0"
+rfc5424-logging-handler = "^1.4.3"
+
+[tool.poetry.scripts]
+opc-ua-listen = 'opc_ua_module.main:run'
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
diff --git a/src/opc_ua_module/__init__.py b/src/opc_ua_module/__init__.py
new file mode 100644
index 0000000..921e727
--- /dev/null
+++ b/src/opc_ua_module/__init__.py
@@ -0,0 +1,16 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
diff --git a/src/opc_ua_module/alarm_capture.py b/src/opc_ua_module/alarm_capture.py
new file mode 100644
index 0000000..7fc61cd
--- /dev/null
+++ b/src/opc_ua_module/alarm_capture.py
@@ -0,0 +1,78 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
+
+import asyncio
+import time
+from asyncua import Client
+from asyncua.ua import ObjectIds
+from opc_ua_module.alarm_handler import AlarmHandler
+from asyncua.crypto.security_policies import SecurityPolicyBasic256Sha256
+
+
+class AlarmCapture:
+
+ def __init__(self, url, syslog_address, output_socket_tcp, certificate, private_key, server_certificate):
+ self._client = Client(url=url)
+ self._alarm_handler = AlarmHandler(syslog_address, url, output_socket_tcp)
+ self._certificate = certificate
+ self._private_key = private_key
+ self._server_certificate = server_certificate
+
+ async def _set_security(self):
+ if not self._private_key:
+ return
+ if not self._certificate:
+ return
+ if not self._server_certificate:
+ return
+ await self._client.set_security(
+ SecurityPolicyBasic256Sha256,
+ self._certificate,
+ self._private_key,
+ server_certificate=self._server_certificate
+ )
+
+ async def _connect(self):
+ while True:
+ try:
+ await self._client.connect()
+ return
+ except OSError as e:
+ print(f'Connection to server failed with with exception: \'{e}\'')
+ wait_duration = 10
+ print(f'Trying again in {wait_duration} seconds...')
+ time.sleep(wait_duration)
+
+ async def _capture(self):
+ await self._set_security()
+ await self._connect()
+ try:
+ subscription = await self._client.create_subscription(1000, self._alarm_handler)
+ handle = await subscription.subscribe_alarms_and_conditions(self._client.nodes.server,
+ ObjectIds.AlarmConditionType)
+
+ try:
+ while True:
+ await asyncio.sleep(100)
+ # note: the finally is necessary in case of Keyboard interrupt
+ finally:
+ await subscription.unsubscribe(handle)
+ finally:
+ await self._client.disconnect()
+
+ def capture(self):
+ asyncio.run(self._capture())
diff --git a/src/opc_ua_module/alarm_handler.py b/src/opc_ua_module/alarm_handler.py
new file mode 100644
index 0000000..7472ad8
--- /dev/null
+++ b/src/opc_ua_module/alarm_handler.py
@@ -0,0 +1,46 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
+
+import logging
+from rfc5424logging import LOG_LOCAL0, Rfc5424SysLogHandler, Rfc5424SysLogAdapter
+import socket
+from urllib.parse import urlparse
+
+
+class AlarmHandler:
+
+ def __init__(self, syslog_server_address, opc_server_url: str, output_socket_tcp):
+ logger = logging.getLogger('opc-ua-listen')
+ logger.setLevel(logging.INFO)
+ socket_type = socket.SOCK_DGRAM
+ self._opc_server_hostname = self._format_opc_server_hostname(opc_server_url)
+ if output_socket_tcp:
+ socket_type = socket.SOCK_STREAM
+ handler = Rfc5424SysLogHandler(address=syslog_server_address, socktype=socket_type, facility=LOG_LOCAL0, msg_as_utf8=False)
+ handler.append_nul = False
+ logger.addHandler(handler)
+ self._logger_adapter = Rfc5424SysLogAdapter(logger)
+
+ def event_notification(self, event):
+ content = repr(event)
+ # append_nul and terminating \n are necessary for rsyslog to correctly interpret messages when they are sent over TCP
+ # see issue CYB-59 and https://docs.python.org/3/library/logging.handlers.html#logging.handlers.SysLogHandler.emit
+ self._logger_adapter.info(f'{content}', hostname=self._opc_server_hostname, appname='OPC-UA', procid='-', msgid="alarm_event")
+
+ def _format_opc_server_hostname(self, opc_server_url: str) -> str:
+ parsed_url = urlparse(opc_server_url)
+ return parsed_url.hostname
diff --git a/src/opc_ua_module/main.py b/src/opc_ua_module/main.py
new file mode 100644
index 0000000..4cb52e7
--- /dev/null
+++ b/src/opc_ua_module/main.py
@@ -0,0 +1,62 @@
+# This file is part of OPC-UA Log Fetcher.
+#
+# Copyright (C) 2023 Airbus CyberSecurity SAS
+#
+# OPC-UA Log Fetcher is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# OPC-UA Log Fetcher is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# OPC-UA Log Fetcher. If not, see .
+
+from argparse import ArgumentParser
+from opc_ua_module.alarm_capture import AlarmCapture
+import sys
+
+_DEFAULT_SERVER_URL = 'opc.tcp://localhost:4840'
+_DEFAULT_SYSLOG_ADDRESS = '/dev/log'
+
+
+class Main:
+
+ def __init__(self):
+ self._parser = ArgumentParser(description='Airbus OPC UA Alarm listener')
+ self._parser.add_argument('-u', '--url', default=_DEFAULT_SERVER_URL,
+ help=f'URL of the OPC UA server to connect to. Default to {_DEFAULT_SERVER_URL}')
+ self._parser.add_argument('-o', '--output', default=_DEFAULT_SYSLOG_ADDRESS,
+ help=f'Address of the syslog output. Either host:port, or a path. Default to {_DEFAULT_SYSLOG_ADDRESS}')
+ self._parser.add_argument('--tcp-output', action='store_true', help='Choose syslog socket to be tcp rather than defaut udp')
+ self._parser.add_argument('--private-key', help='Path to the private key (.pem)')
+ self._parser.add_argument('--certificate', help='Path to the certificate (.der)')
+ self._parser.add_argument('--server-certificate', help='Path to the server certificate (.der)')
+
+ def _parse_syslog_output(self, output):
+ if ':' not in output:
+ return output
+ [host, port] = output.split(':', 1)
+ return (host, int(port))
+
+ def run(self, arguments):
+ try:
+ arguments = self._parser.parse_args(arguments[1:])
+ syslog_address = self._parse_syslog_output(arguments.output)
+ client = AlarmCapture(arguments.url, syslog_address, arguments.tcp_output,
+ arguments.certificate, arguments.private_key, arguments.server_certificate)
+ client.capture()
+ except KeyboardInterrupt:
+ pass
+ # TODO error cases to handle
+ # ConnectionRefusedError here!!!!! when the server url is incorrect
+ # Value error on --output 'localhost:toto'
+ # OSError Bad file descriptor error on --output '/toto'
+
+
+def run():
+ main = Main()
+ main.run(sys.argv)