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[Fix] Backward-compatible version negotiation for multi-flag fuzzy 5894/head
authorVsevolod Stakhov <vsevolod@rspamd.com>
Thu, 19 Feb 2026 17:32:10 +0000 (17:32 +0000)
committerVsevolod Stakhov <vsevolod@rspamd.com>
Thu, 19 Feb 2026 17:32:10 +0000 (17:32 +0000)
commit1956bf851d0fd0b2f2dd47de1518cf93e1456517
tree292d669d44c424962b7eacf58fe80f7e85268d2btree | snapshot
parenta0945893e2523f69b43c15d94aacc178a8497e06commit | diff
[Fix] Backward-compatible version negotiation for multi-flag fuzzy

Use an unused bit (bit 4) in the version byte as a v2 capability flag.
New clients send version 4|0x10 initially; old servers mask to 4 and
work normally, new servers see the cap bit and send v2 replies. Once
a v2 reply is received, subsequent requests use native version 5.
src/fuzzy_storage.c diff | blob | blame | history
src/libserver/fuzzy_wire.h diff | blob | blame | history
src/plugins/fuzzy_check.c diff | blob | blame | history
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