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Binding on multiple addresses for QUIC is safe only if IP_PKTINFO or equivalent is available. Else, the behavior may be undefined as the system is responsible to choose the network interface and source address on response. This commit adds a warning on boot if no or partial support for IP_PKTINFO or equivalent is detected and configuration contains UDP binding on multiple addresses. This should be backported up to 2.6. Special backport recommdations : * change ha_warning() to ha_diag_warning() to ensure no spurrious warnings will be triggered on stable releases * IP_PKTINFO usage was introduced on 2.7. For 2.6, multiple addresses QUIC binding is always unreliable. As such, preprocessor condition must simply be removed so that the warning is always active regarding of the system. Warning message should also be truncated to suppress IP_PKTINFO reference.
The HAProxy documentation has been split into a number of different files for ease of use. 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)