Mirrors/coredns
1
0
Fork 0
mirror of https://github.com/coredns/coredns.git synced 2026-07-15 20:20:10 -04:00
Code Issues Packages Projects Releases Wiki Activity

fix(local): handle names under .localhost. (#8151)

Browse Source
This commit is contained in:
Immanuel Tikhonov
2026-06-24 13:31:31 +04:00
committed by GitHub
parent faeb8ba699
commit e45ad5f87a
7 changed files with 211 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
plugin/local/local.go
View File

@@ -16,7 +16,8 @@ var log = clog.NewWithPlugin("local")
// Local is a plugin that returns standard replies for local queries.
type Local struct {
Next plugin.Handler
Next plugin.Handler
disableLocalhostPrefix bool
}
var zones = []string{"localhost.", "0.in-addr.arpa.", "127.in-addr.arpa.", "255.in-addr.arpa."}
@@ -37,8 +38,11 @@ func (l Local) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (
qname := state.QName()
lc := len("localhost.")
if len(state.Name()) > lc && strings.HasPrefix(state.Name(), "localhost.") {
// we have multiple labels, but the first one is localhost, intercept this and return 127.0.0.1 or ::1
name := state.Name()
matchesRFCSubdomain := len(name) > lc && strings.HasSuffix(name, ".localhost.")
matchesLegacyPrefix := len(name) > lc && !l.disableLocalhostPrefix && strings.HasPrefix(name, "localhost.")
if matchesRFCSubdomain || matchesLegacyPrefix {
// Intercept special localhost subdomain queries and return loopback addresses for A/AAAA queries.
log.Debugf("Intercepting localhost query for %q %s, from %s", state.Name(), state.Type(), state.IP())
LocalhostCount.Inc()
reply := doLocalhost(state)