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On the frontend side, QUIC transfer can be performed either via a connection owned FD or multiplex on the listener one. When a quic_conn is freed and converted to quic_conn_closed instance, its FD if open is closed and all exchanges are now multiplex via the listener FD. This is different for the backend as connections only has the choice to use their owned FD. Thus, special care care must be taken when freeing a connection and converting it to a quic_conn_closed instance. In this case, qc_release_fd() is delayed to the quic_conn_closed release. Furthermore, when the FD is transferred, its iocb and owner fields are updated to the new quic_conn_closed instance. Without it, a crash will occur when accessing the freed quic_conn tasklet. A newly dedicated handler quic_conn_closed_sock_fd_iocb is used to ensure access to quic_conn_closed members only.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.