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wait-for-handshake is an http-request action which permits to delay the processing of content received as TLS early data. The action yields as long as connection handshake is in progress. In the meantime, stconn is flagged with SE_FL_WAIT_FOR_HS. When the handshake is finished, MUX layer is responsible to woken up SE_FL_WAIT_FOR_HS flagged stconn instances to restart the stream processing. On sc_conn_process(), SE_FL_WAIT_FOR_HS flag is removed and stream layer is woken up. However, there may be a blocking after MUX notification. sc_conn_recv() may return 0 due to no new data reception, which prevents sc_conn_process() execution. The stream is thus blocked until its timeout. To fix this, checks in sc_conn_recv() about the handshake termination condition. If true, explicitely returns 1 to ensure sc_conn_process() will be executed. Note that this bug is not reproducible due to various conditions related to early data implementation in haproxy. Indeed, connection layer instantiation is always delayed until SSL handshake completion, which prevents the handling of early data as expected. This fix will be necessary to implement wait-for-handshake support for QUIC. As such, it must be backported with the next commit up to 2.6, after a mandatory period of observation.
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.