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Do not cache IP addresses which resolve into themselves

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link2xt
2023-01-19 20:43:53 +00:00
parent 7935085e74
commit 0978357c5f
1 changed files with 7 additions and 6 deletions
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13
src/net.rs
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@@ -55,8 +55,13 @@ async fn lookup_host_with_cache(
};
for (i, addr) in resolved_addrs.iter().enumerate() {
info!(context, "Resolved {}:{} into {}.", hostname, port, &addr);
let ip_string = addr.ip().to_string();
if ip_string == hostname {
// IP address resolved into itself, not interesting to cache.
continue;
}
info!(context, "Resolved {}:{} into {}.", hostname, port, &addr);
let i = i64::try_from(i).unwrap_or_default();
// Update the cache.
@@ -71,11 +76,7 @@ async fn lookup_host_with_cache(
VALUES (?, ?, ?)
ON CONFLICT (hostname, address)
DO UPDATE SET timestamp=excluded.timestamp",
paramsv![
hostname,
addr.ip().to_string(),
now.saturating_add(i).saturating_add(1)
],
paramsv![hostname, ip_string, now.saturating_add(i).saturating_add(1)],
)
.await?;
}