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view auto/lib/google-perftools/conf @ 9191:618132842e7c
QUIC: ignore duplicate PATH_CHALLENGE frames.
According to RFC 9000, an endpoint SHOULD NOT send multiple PATH_CHALLENGE
frames in a single packet. The change adds a check to enforce this claim to
optimize server behavior. Previously each PATH_CHALLENGE always resulted in a
single response datagram being sent to client. The effect of this was however
limited by QUIC flood protection.
Also, PATH_CHALLENGE is explicitly disabled in Initial and Handshake levels,
see RFC 9000, Table 3. However, technically it may be sent by client in 0-RTT
over a new path without actual migration, even though the migration itself is
prohibited during handshake. This allows client to coalesce multiple 0-RTT
packets each carrying a PATH_CHALLENGE and end up with multiple PATH_CHALLENGEs
per datagram. This again leads to suboptimal behavior, see above. Since the
purpose of sending PATH_CHALLENGE frames in 0-RTT is unclear, these frames are
now only allowed in 1-RTT. For 0-RTT they are silently ignored.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 22 Nov 2023 14:48:12 +0400 |
parents | f7e79596baf2 |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. ngx_feature="Google perftools" ngx_feature_name= ngx_feature_run=no ngx_feature_incs= ngx_feature_path= ngx_feature_libs="-lprofiler" ngx_feature_test="void ProfilerStop(void); ProfilerStop()" . auto/feature if [ $ngx_found = no ]; then # FreeBSD port ngx_feature="Google perftools in /usr/local/" if [ $NGX_RPATH = YES ]; then ngx_feature_libs="-R/usr/local/lib -L/usr/local/lib -lprofiler" else ngx_feature_libs="-L/usr/local/lib -lprofiler" fi . auto/feature fi if [ $ngx_found = no ]; then # MacPorts ngx_feature="Google perftools in /opt/local/" if [ $NGX_RPATH = YES ]; then ngx_feature_libs="-R/opt/local/lib -L/opt/local/lib -lprofiler" else ngx_feature_libs="-L/opt/local/lib -lprofiler" fi . auto/feature fi if [ $ngx_found = yes ]; then CORE_LIBS="$CORE_LIBS $ngx_feature_libs" else cat << END $0: error: the Google perftools module requires the Google perftools library. You can either do not enable the module or install the library. END exit 1 fi