From 8d9da67185aac48d7d0bc1e7b90262ae9afc6a64 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Tue, 27 Mar 2012 13:36:16 +0200
Subject: [PATCH] s4 dns: Only forward for zones we don't own

---
 source4/dns_server/dns_query.c  |  5 +++--
 source4/dns_server/dns_server.h |  2 ++
 source4/dns_server/dns_utils.c  | 28 ++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/source4/dns_server/dns_query.c b/source4/dns_server/dns_query.c
index e57512c4883..9d287bd3a42 100644
--- a/source4/dns_server/dns_query.c
+++ b/source4/dns_server/dns_query.c
@@ -226,8 +226,9 @@ WERROR dns_server_process_query(struct dns_server *dns,
 		return DNS_ERR(NOT_IMPLEMENTED);
 	}
 
-	werror = handle_question(dns, mem_ctx, &in->questions[0], &ans, &num_answers);
-	if(W_ERROR_EQUAL(DNS_ERR(NAME_ERROR), werror)) {
+	if (dns_authorative_for_zone(dns, in->questions[0].name)) {
+		werror = handle_question(dns, mem_ctx, &in->questions[0], &ans, &num_answers);
+	} else {
 		DEBUG(2, ("I don't feel responsible for '%s', forwarding\n", in->questions[0].name));
 		werror = ask_forwarder(mem_ctx, &in->questions[0], &ans, &num_answers,
 				       &ns, &num_nsrecs, &adds, &num_additional);
diff --git a/source4/dns_server/dns_server.h b/source4/dns_server/dns_server.h
index 53d63063180..718df00dd8b 100644
--- a/source4/dns_server/dns_server.h
+++ b/source4/dns_server/dns_server.h
@@ -59,6 +59,8 @@ bool dns_name_match(const char *zone, const char *name, size_t *host_part_len);
 bool dns_name_equal(const char *name1, const char *name2);
 bool dns_records_match(struct dnsp_DnssrvRpcRecord *rec1,
 		       struct dnsp_DnssrvRpcRecord *rec2);
+bool dns_authorative_for_zone(struct dns_server *dns,
+			      const char *name);
 WERROR dns_lookup_records(struct dns_server *dns,
 			  TALLOC_CTX *mem_ctx,
 			  struct ldb_dn *dn,
diff --git a/source4/dns_server/dns_utils.c b/source4/dns_server/dns_utils.c
index 1f7648cd5b4..b4f308c0279 100644
--- a/source4/dns_server/dns_utils.c
+++ b/source4/dns_server/dns_utils.c
@@ -294,6 +294,34 @@ WERROR dns_replace_records(struct dns_server *dns,
 	return WERR_OK;
 }
 
+bool dns_authorative_for_zone(struct dns_server *dns,
+			      const char *name)
+{
+	const struct dns_server_zone *z;
+	size_t host_part_len = 0;
+
+	if (name == NULL) {
+		return false;
+	}
+
+	if (strcmp(name, "") == 0) {
+		return true;
+	}
+	for (z = dns->zones; z != NULL; z = z->next) {
+		bool match;
+
+		match = dns_name_match(z->name, name, &host_part_len);
+		if (match) {
+			break;
+		}
+	}
+	if (z == NULL) {
+		return false;
+	}
+
+	return true;
+}
+
 WERROR dns_name2dn(struct dns_server *dns,
 		   TALLOC_CTX *mem_ctx,
 		   const char *name,
-- 
2.11.4.GIT