1 files changed, 23 insertions, 0 deletions
diff --git a/middleware/bind/setup.go b/middleware/bind/setup.go
new file mode 100644
index 000000000..c08098b5d
--- /dev/null
+++ b/middleware/bind/setup.go
@@ -0,0 +1,23 @@
+package bind
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/miekg/coredns/core/dnsserver"
+
+	"github.com/mholt/caddy"
+)
+
+func setupBind(c *caddy.Controller) error {
+	config := dnsserver.GetConfig(c)
+	for c.Next() {
+		if !c.Args(&config.ListenHost) {
+			return c.ArgErr()
+		}
+	}
+	if net.ParseIP(config.ListenHost) == nil {
+		return fmt.Errorf("not a valid IP address: %s", config.ListenHost)
+	}
+	return nil
+}