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feat(hosts): give a host a pool of SNIs, random per config or shared (#6923)

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Rotating SNIs meant one host entry per domain. A host now takes a pool of
SNIs: with more than one, every generated config gets a random entry,
or, with the shared switch on, the whole host group uses one pick per
subscription fetch. Raw, JSON and Clash output, the panel's link preview
and node adoption all carry the pool.

sni stays the pool's first entry, so a rolled-back binary and API callers
that only know the single field keep working; an sni outside the pool
becomes its primary. A host with one SNI renders exactly as before.
This commit is contained in:
Pejman Yousefi
2026-10-24 22:35:42 +03:30
committed by GitHub
parent 14c9bdff89
commit 8da3b3c344
33 changed files with 675 additions and 13 deletions
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frontend/src/lib/hosts/host-link.ts
+17 -2
View File
@@ -88,6 +88,18 @@ function splitAdvertisedHost(value: string, inboundPort: number): [string, numbe
return [addr, inboundPort];
}
function randomSni(snis: string[]): string {
return snis[Math.floor(Math.random() * snis.length)] ?? '';
}
// The SNI one endpoint advertises before the address and blank overrides: the group's shared
// pick, a fresh random entry of a multi-SNI pool, or the single SNI.
function poolSni(record: HostRecord, shared: string | undefined): string | undefined {
if (shared) return shared;
const snis = (record.snis ?? []).filter((s) => s.trim() !== '');
return snis.length > 1 ? randomSni(snis) : record.sni || undefined;
}
export interface HostEndpoint {
dest: string;
port: number;
@@ -115,6 +127,9 @@ export function hostEndpointsFor(
) {
continue;
}
const snis = (record.snis ?? []).filter((s) => s.trim() !== '');
const shared = record.sniSharedRandom && snis.length > 1 ? randomSni(snis) : undefined;
for (const value of record.hosts) {
const [address, port] = splitAdvertisedHost(value, inboundPort);
const dest = address || defaultDest;
@@ -129,7 +144,7 @@ export function hostEndpointsFor(
remark = record.remark ? `${record.remark} - ${i + 1}` : `${i + 1}`;
}
const endpoint: HostEndpoint = { dest: ip, port, remark };
const sni = record.overrideSniFromAddress ? ip : record.sni;
const sni = record.overrideSniFromAddress ? ip : poolSni(record, shared);
if (!record.keepSniBlank && sni) endpoint.sni = sni;
if (record.alpn && record.alpn.length > 0) endpoint.alpn = record.alpn;
if (record.allowInsecure) endpoint.allowInsecure = true;
@@ -139,7 +154,7 @@ export function hostEndpointsFor(
}
}
const endpoint: HostEndpoint = { dest, port, remark: record.remark || '' };
const sni = record.overrideSniFromAddress ? dest : record.sni;
const sni = record.overrideSniFromAddress ? dest : poolSni(record, shared);
if (!record.keepSniBlank && sni) endpoint.sni = sni;
if (record.alpn && record.alpn.length > 0) endpoint.alpn = record.alpn;
if (record.allowInsecure) endpoint.allowInsecure = true;