diff options
Diffstat (limited to 'net/dnscache/dnscache.go')
| -rw-r--r-- | net/dnscache/dnscache.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/dnscache/dnscache.go b/net/dnscache/dnscache.go index 2cbea6c0f..3cbb5ccd8 100644 --- a/net/dnscache/dnscache.go +++ b/net/dnscache/dnscache.go @@ -202,6 +202,20 @@ func (r *Resolver) LookupIP(ctx context.Context, host string) (ip, v6 netip.Addr r.dlogf("returning %d static results", len(allIPs)) return } + + // Hard-code this to avoid extra work, DNS fallbacks, etc. + if host == "localhost" { + r.dlogf("host is localhost") + + // TODO: @raggi mentioned that some distributions don't use + // 127.0.0.1 as the localhost IP; should we check the interface + // address to determine this? + ip = netip.AddrFrom4([4]byte{127, 0, 0, 1}) + v6 = netip.IPv6Loopback() + allIPs = []netip.Addr{ip, v6} + err = nil + return + } if ip, err := netip.ParseAddr(host); err == nil { ip = ip.Unmap() r.dlogf("%q is an IP", host) |