Support outgoing zone transfers

These can be enabled by adding "transfer out" to the Corefile. Without
it no AXFR is allowed.

For now only AXFR and no IXFR. No TSIG and no ACLs.

2 files changed, 23 insertions, 0 deletions

diff --git a/middleware/file/tree/all.go b/middleware/file/tree/all.go
new file mode 100644
index 000000000..f621e3465
--- /dev/null
+++ b/middleware/file/tree/all.go
@@ -0,0 +1,21 @@
+package tree
+
+// All traverses tree and returns all elements
+func (t *Tree) All() []*Elem {
+	if t.Root == nil {
+		return nil
+	}
+	found := t.Root.all(nil)
+	return found
+}
+
+func (n *Node) all(found []*Elem) []*Elem {
+	if n.Left != nil {
+		found = n.Left.all(found)
+	}
+	found = append(found, n.Elem)
+	if n.Right != nil {
+		found = n.Right.all(found)
+	}
+	return found
+}
diff --git a/middleware/file/tree/tree.go b/middleware/file/tree/tree.go
index db57c2092..234060eba 100644
--- a/middleware/file/tree/tree.go
+++ b/middleware/file/tree/tree.go
@@ -528,6 +528,8 @@ func (n *Node) floor(rr dns.RR) *Node {
 	return n
 }
 
+// TODO(successor, predecessor)
+
 // Ceil returns the smallest value equal to or greater than the query q according to q.Compare().
 func (t *Tree) Ceil(rr dns.RR) *Elem {
 	if t.Root == nil {