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chore(pmtud/tcp): silently discard IPv6 network unreachable errors

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This commit is contained in:
Quentin McGaw
2026-02-20 16:24:25 +00:00
parent c66d8bed00
commit 1dee183a70
2 changed files with 13 additions and 1 deletions
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internal/pmtud/tcp/mss.go
+3
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@@ -43,6 +43,9 @@ func findHighestMSSDestination(ctx context.Context, familyToFD map[int]fileDescr
case err != nil: // error already occurred for another findMSS goroutine
case errors.Is(result.err, firewall.ErrMarkMatchModuleMissing):
err = fmt.Errorf("finding MSS for %s: %w", result.dst, result.err)
case dst.Addr().Is6() && errors.Is(result.err, ip.ErrNetworkUnreachable):
// silently discard IPv6 network unreachable errors since they are common
// and expected when the host doesn't have IPv6 connectivity
default: // another error not due to the match module missing
logger.Debugf("finding MSS for %s failed: %s", result.dst, result.err)
}