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Default Cluster Drafts

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Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>
This commit is contained in:
Alexey
2026-02-12 18:25:41 +03:00
parent 5bde202866
commit 84668e671e
3 changed files with 92 additions and 12 deletions
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21
src/transport/upstream.rs
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@@ -66,10 +66,25 @@ impl UpstreamState {
}
}
/// Convert dc_idx (1-based, may be negative) to array index 0..4
/// Map DC index to latency array slot (0..NUM_DCS).
///
/// Matches the C implementation's `mf_cluster_lookup` behavior:
/// - Standard DCs ±1..±5 → direct mapping to array index 0..4
/// - Unknown DCs (CDN, media, etc.) → default DC slot (index 1 = DC 2)
/// This matches Telegram's `default 2;` in proxy-multi.conf.
/// - There is NO modular arithmetic in the C implementation.
fn dc_array_idx(dc_idx: i16) -> Option<usize> {
let idx = (dc_idx.unsigned_abs() as usize).checked_sub(1)?;
if idx < NUM_DCS { Some(idx) } else { None }
let abs_dc = dc_idx.unsigned_abs() as usize;
if abs_dc == 0 {
return None;
}
if abs_dc >= 1 && abs_dc <= NUM_DCS {
Some(abs_dc - 1)
} else {
// Unknown DC → default cluster (DC 2, index 1)
// Same as C: mf_cluster_lookup returns default_cluster
Some(1)
}
}
/// Get latency for a specific DC, falling back to average across all known DCs