No description
a41f625fab
It is possible that TCP connect() will fail if for example network interface does not have IP address set. In this case we close the connection during net_tcp_connect() but do not set the return code properly. This looks in the application like the connection succeeded even if it was not. As the tcp_in() call in net_tcp_connect() might close the connection, we just take extra ref count while calling tcp_in(). Otherwise we might access already freed connection. Before the fix: net_tcp_connect: context: 0x80757c0, local: 0.0.0.0, remote: 192.0.2.2 net_tcp_connect: conn: 0x8087320 src: 0.0.0.0, dst: 192.0.2.2 tcp_in: [LISTEN Seq=1604170158 Ack=0] tcp_conn_close_debug: conn: 0x8087320 closed by TCP stack (tcp_in():3626) tcp_conn_close_debug: LISTEN->CLOSED tcp_conn_unref: conn: 0x8087320, ref_count=1 net_tcp_connect: conn: 0x8087320, ret=0 After the fix: net_tcp_connect: context: 0x80757c0, local: 0.0.0.0, remote: 192.0.2.2 net_tcp_connect: conn: 0x8087320 src: 0.0.0.0, dst: 192.0.2.2 tcp_conn_ref: conn: 0x8087320, ref_count: 2 tcp_in: [LISTEN Seq=1604170158 Ack=0] tcp_conn_close_debug: conn: 0x8087320 closed by TCP stack (tcp_in():3626) tcp_conn_close_debug: LISTEN->CLOSED tcp_conn_unref: conn: 0x8087320, ref_count=2 net_tcp: tcp_conn_unref: conn: 0x8087320, ref_count=1 net_tcp: net_tcp_connect: conn: 0x8087320, ret=-128 Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no> |
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| .github | ||
| arch | ||
| boards | ||
| cmake | ||
| doc | ||
| drivers | ||
| dts | ||
| include/zephyr | ||
| kernel | ||
| lib | ||
| misc | ||
| modules | ||
| samples | ||
| scripts | ||
| share | ||
| snippets | ||
| soc | ||
| submanifests | ||
| subsys | ||
| tests | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .codechecker.yml | ||
| .codecov.yml | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .gitlint | ||
| .mailmap | ||
| .yamllint | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CODEOWNERS | ||
| CONTRIBUTING.rst | ||
| Kconfig | ||
| Kconfig.constants | ||
| Kconfig.zephyr | ||
| LICENSE | ||
| MAINTAINERS.yml | ||
| README.rst | ||
| SDK_VERSION | ||
| VERSION | ||
| version.h.in | ||
| west.yml | ||
| zephyr-env.cmd | ||
| zephyr-env.sh | ||
.. raw:: html
<a href="https://www.zephyrproject.org">
<p align="center">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="doc/_static/images/logo-readme-dark.svg">
<source media="(prefers-color-scheme: light)" srcset="doc/_static/images/logo-readme-light.svg">
<img src="doc/_static/images/logo-readme-light.svg">
</picture>
</p>
</a>
<a href="https://bestpractices.coreinfrastructure.org/projects/74">
<img src="https://bestpractices.coreinfrastructure.org/projects/74/badge">
</a>
<a href="https://scorecard.dev/viewer/?uri=github.com/zephyrproject-rtos/zephyr">
<img src="https://api.securityscorecards.dev/projects/github.com/zephyrproject-rtos/zephyr/badge">
</a>
<a href="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml?query=branch%3Amain">
<img src="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml/badge.svg?event=push">
</a>
The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.
The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.
The Zephyr kernel supports multiple architectures, including ARM (Cortex-A,
Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V,
SPARC, MIPS, and a large number of `supported boards`_.
.. below included in doc/introduction/introduction.rst
Getting Started
***************
Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.
.. start_include_here
Community Support
*****************
Community support is provided via mailing lists and Discord; see the Resources
below for details.
.. _project-resources:
Resources
*********
Here's a quick summary of resources to help you find your way around:
Getting Started
---------------
| 📖 `Zephyr Documentation`_
| 🚀 `Getting Started Guide`_
| 🙋🏽 `Tips when asking for help`_
| 💻 `Code samples`_
Code and Development
--------------------
| 🌐 `Source Code Repository`_
| 📦 `Releases`_
| 🤝 `Contribution Guide`_
Community and Support
---------------------
| 💬 `Discord Server`_ for real-time community discussions
| 📧 `User mailing list (users@lists.zephyrproject.org)`_
| 📧 `Developer mailing list (devel@lists.zephyrproject.org)`_
| 📬 `Other project mailing lists`_
| 📚 `Project Wiki`_
Issue Tracking and Security
---------------------------
| 🐛 `GitHub Issues`_
| 🔒 `Security documentation`_
| 🛡️ `Security Advisories Repository`_
| ⚠️ Report security vulnerabilities at vulnerabilities@zephyrproject.org
Additional Resources
--------------------
| 🌐 `Zephyr Project Website`_
| 📺 `Zephyr Tech Talks`_
.. _Zephyr Project Website: https://www.zephyrproject.org
.. _Discord Server: https://chat.zephyrproject.org
.. _supported boards: https://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: https://docs.zephyrproject.org
.. _Introduction to Zephyr: https://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: https://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: https://docs.zephyrproject.org/latest/contribute/index.html
.. _Source Code Repository: https://github.com/zephyrproject-rtos/zephyr
.. _GitHub Issues: https://github.com/zephyrproject-rtos/zephyr/issues
.. _Releases: https://github.com/zephyrproject-rtos/zephyr/releases
.. _Project Wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _User mailing list (users@lists.zephyrproject.org): https://lists.zephyrproject.org/g/users
.. _Developer mailing list (devel@lists.zephyrproject.org): https://lists.zephyrproject.org/g/devel
.. _Other project mailing lists: https://lists.zephyrproject.org/g/main/subgroups
.. _Code samples: https://docs.zephyrproject.org/latest/samples/index.html
.. _Security documentation: https://docs.zephyrproject.org/latest/security/index.html
.. _Security Advisories Repository: https://github.com/zephyrproject-rtos/zephyr/security
.. _Tips when asking for help: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help
.. _Zephyr Tech Talks: https://www.zephyrproject.org/tech-talks