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hotfix(pmtud): lower min MTU to MSS-matching-MTU minus 100 in case MSS is very small

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This commit is contained in:
Quentin McGaw
2026-02-19 22:39:24 +00:00
parent 2192874de8
commit ea87c0a2aa
2 changed files with 21 additions and 14 deletions
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internal/pmtud/pmtud.go
+1 -1
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@@ -66,7 +66,7 @@ func PathMTUDiscover(ctx context.Context, icmpAddrs []netip.Addr, tcpAddrs []net
minMTU = constants.MinIPv6MTU
}
if icmpSuccess {
const mtuMargin = 300
const mtuMargin = 150
minMTU = max(maxPossibleMTU-mtuMargin, minMTU)
}
mtu, err = tcp.PathMTUDiscover(ctx, tcpAddrs, minMTU, maxPossibleMTU, tryTimeout, fw, logger)