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qpack_decode_fs() is used to decode QPACK field section on HTTP/3 headers parsing. Its return value is incoherent as it returns either QPACK_DECOMPRESSION_FAILED defined in RFC 9204 or any other internal values defined in qpack-dec.h. On failure, such return code is reused by HTTP/3 layer to be reported via a CONNECTION_CLOSE frame. This is incorrect if an internal error values was reported as it is not defined by any specification. Fir return values of qpack_decode_fs() in two ways. Firstly, fix invalid usages of QPACK_DECOMPRESSION_FAILED when decoded content is too large for the correct internal error QPACK_ERR_TOO_LARGE. Secondly, adjust qpack_decode_fs() API to only returns internal code values. A new internal enum QPACK_ERR_DECOMP is defined to replace QPACK_DECOMPRESSION_FAILED. Caller is responsible to convert it to a suitable error value. For other internal values, H3_INTERNAL_ERROR is used. This is done through a set of convert functions. This should be backported up to 2.6. Note that trailers are not supported in 2.6 so chunk related to h3_trailers_to_htx() can be safely skipped.
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)