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view docs/xml/change_log_conf.xml @ 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 | 76bc29f06168 |
children |
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<?xml version="1.0" ?> <!DOCTYPE configuration SYSTEM "../dtd/change_log_conf.dtd" > <configuration> <length>76</length> <start> *) </start> <indent> </indent> <changes lang="ru"> <title>Изменения в </title> <length>66</length> <bugfix>Исправление</bugfix> <feature>Добавление</feature> <change>Изменение</change> <security>Безопасность</security> <workaround>Изменение</workaround> </changes> <changes lang="en"> <title>Changes with </title> <length>65</length> <bugfix>Bugfix</bugfix> <feature>Feature</feature> <change>Change</change> <security>Security</security> <workaround>Workaround</workaround> <month> Jan </month> <month> Feb </month> <month> Mar </month> <month> Apr </month> <month> May </month> <month> Jun </month> <month> Jul </month> <month> Aug </month> <month> Sep </month> <month> Oct </month> <month> Nov </month> <month> Dec </month> </changes> </configuration>