217e467e89
This bug arrived with this commit: cdfceb10a MINOR: quic: refactor qc_prep_pkts() loop which prevents haproxy from sending PING only packets/datagrams (some packets/datagrams with only PING frame as ack-eliciting frames inside). Such packets/datagrams are useful in rare cases during retransmissions when one wants to probe the peer without exceeding the anti-amplification limit. Modify the condition passed to qc_build_pkt() to add padding to the current datagram. One does not want to do that when probing the peer without ack-eliciting frames passed as <frms> parameter. Indeed qc_build_pkt() calls qc_do_build_pkt() which supports this case: if <probe> is true (probing required), qc_do_build_pkt() handles the case where some padding must be added to a PING only packet/datagram. This is the case when probing with an empty <frms> frame list of ack-eliciting frames without exceeding the anti-amplification limit from qc_dgrams_retransmit(). Add some comments to qc_build_pkt() and qc_do_build_pkt() to clarify this as this code is easy to break! Thank you for @Tristan971 for having reported this issue in GH #2709. Must be backported to 3.0.
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.