75027692a3
Previous commit introduces support for multiple Rx buffers per QCS instance. Contiguous data may be splitted accross multiple buffers depending on their offset. A particular issue could arise with this new model. Indeed, app_ops rcv_buf callback can still deal with a single buffer at a time. This may cause a deadlock in decoding if app_ops layer cannot proceed due to partial data, but such data are precisely divided on two buffers. This can for example intervene during HTTP/3 frame header parsing. To deal with this, a new function is implemented to force data realign between two contiguous buffers. This is called only when app_ops rcv_buf returned 0 but data is available in the next buffer after the current one. In this case, data are transferred from the next into the current buffer via qcs_transfer_rx_data(). Decoding is then restarted, which should ensure that app_ops layer has enough data to advance. During this operation, special care is ensure to removed both qc_stream_rxbuf entries, as their offset are adjusted. The next buffer is only reinserted if there is remaining data in it, else it can be freed. This case is not easily reproducible as it depends on the HTTP/3 framing used by the client. It seems to be easily reproduced though with quiche. $ quiche-client --http-version HTTP/3 --method POST --body /tmp/100m \ "https://127.0.0.1:20443/post"
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.