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feat: support wildcard custom domains in gateway #545

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Merged
kvinwang merged 2 commits into from
Mar 17, 2026
Merged

feat: support wildcard custom domains in gateway #545

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6b2a018
feat: support wildcard custom domains in gateway TXT resolution
kvinwang Mar 16, 2026
fb5914b
fix: allow wildcard fallback in non-compat mode
kvinwang Mar 16, 2026
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21 changes: 16 additions & 5 deletions gateway/src/proxy/tls_passthough.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -58,19 +58,30 @@ async fn resolve_app_address(prefix: &str, sni: &str, compat: bool) -> Result<Ap
};
return AppAddress::parse(data).context("failed to parse app address");
}
anyhow::bail!("failed to resolve legacy app address");
} else {
} else if let Ok(lookup) = resolver.txt_lookup(txt_domain).await {
if let Some(txt_record) = lookup.iter().next() {
if let Some(data) = txt_record.txt_data().first() {
return AppAddress::parse(data).context("failed to parse app address");
}
}
}

// wildcard fallback: try {prefix}-wildcard.{parent_domain}
if let Some((_, parent)) = sni.split_once('.') {
let wildcard_domain = format!("{prefix}-wildcard.{parent}");
let lookup = resolver
.txt_lookup(txt_domain)
.txt_lookup(wildcard_domain)
.await
.context("failed to lookup app address")?;
.context("failed to lookup wildcard app address")?;
let txt_record = lookup.iter().next().context("no txt record found")?;
let data = txt_record
.txt_data()
.first()
.context("no data in txt record")?;
AppAddress::parse(data).context("failed to parse app address")
return AppAddress::parse(data).context("failed to parse app address");
}

anyhow::bail!("failed to resolve app address for {sni}");
}

pub(crate) async fn proxy_with_sni(
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