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HAProxy - Load balancer
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Amaury Denoyelle 687df405fe BUG/MINOR: connection: streamline conn detach from lists 
Over their lifetime, connections are attached to different list. These
lists depends on whether connection is on frontend or backend side.
Attach point members are stored via a union in struct connection. The
next commit reorganizes them so that a proper frontend/backend
separation is performed :

  commit a96f1286a7
  BUG/MINOR: connection: rearrange union list members

On conn_free(), connection instance must be removed from these lists to
ensure there is no use-after-free case. However code was still shaky
there, despite no real issue. Indeed, <toremove_list> was detached for
all connections, despite being only used on backend side only.

This patch streamlines the freeing of connection. Now, <toremove_list>
detach is performed in conn_backend_deinit(). Moreover, a new helper
conn_frontend_deinit() is defined. It ensures that <stopping_list>
detach is done. Prior it was performed individually by muxes.

Note that a similar procedure is performed when the connection is
reversed. Hence, conn_frontend_deinit() is now used here as well,
rendering reversal from FE to BE or vice versa symmetrical.

As mentionned above, no crash occured prior to this patch, but the code
was fragile, in particular access to <toremove_list> for frontend
connections. Thus this patch is considered as a bug fix worthy of a
backport along with above mentionned patch, currently up to 3.0.
2025-09-04 18:31:20 +02:00
.github CI: fix syntax of Quic Interop pipelines 2025-09-03 11:36:14 +02:00
addons MINOR: applet: Add a flag to know an applet is using HTX buffers 2025-08-25 11:11:05 +02:00
admin BUG/MINOR: halog: Add OOM checks for calloc() in filter_count_srv_status() and filter_count_url() 2025-09-02 07:29:54 +02:00
dev DEV: gdb: add a memprofile decoder to the debug tools 2025-07-16 15:33:33 +02:00
doc MAJOR: backend: switch the default balancing algo to "random" 2025-09-04 08:30:35 +02:00
examples MINOR: mailers: warn if mailers are configured but not actually used 2025-06-27 16:41:18 +02:00
include MINOR: stats-file: reserve some bytes in exported structs 2025-09-03 16:29:48 +02:00
reg-tests REGTESTS: explicitly use "balance roundrobin" where RR is needed 2025-09-04 08:18:53 +02:00
scripts BUILD: adjust scripts/build-ssl.sh to modern CMake system of QuicTLS 2025-07-11 05:04:31 +02:00
src BUG/MINOR: connection: streamline conn detach from lists 2025-09-04 18:31:20 +02:00
tests TESTS: Fix build for filltab25.c 2025-04-03 15:59:41 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-2 2025-02-12 13:18:55 +01:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.3-dev7 2025-08-20 21:52:39 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-05-28 16:46:15 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile MINOR: build: Add a new option, USE_KTLS. 2025-08-20 18:33:11 +02:00
README.md DOC: change the link to the FreeBSD CI in README.md 2024-06-03 15:21:29 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.3-dev7 2025-08-20 21:52:39 +02:00
VERSION [RELEASE] Released version 3.3-dev7 2025-08-20 21:52:39 +02:00

README.md

HAProxy

alpine/musl AWS-LC openssl no-deprecated Illumos NetBSD FreeBSD VTest

HAProxy logo

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:

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.