From fecc0fd86f598807129ea9fa1e4e7b74cf2aba21 Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Mon, 11 Nov 2019 17:36:58 +0100
Subject: [PATCH] Add support for servestale records

Serve-stale support includes two new database methods. Add wrapper into
ldap database.
---
 configure.ac      |  5 +++++
 src/ldap_driver.c | 24 ++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/configure.ac b/configure.ac
index d05bad9..7997898 100644
--- a/configure.ac
+++ b/configure.ac
@@ -120,6 +120,11 @@ int main(void) {
 [AC_MSG_ERROR([Cross compiling is not supported.])]
 )
 
+dnl dns_db_setservestalettl() can be backported, detect support
+AC_CHECK_LIB([dns], [dns_db_setservestalettl],
+  [AC_DEFINE([HAVE_DNS_SERVESTALE], 1, [Define if dns library provides dns_db_setservestalettl])]
+)
+
 dnl Older autoconf (2.59, for example) doesn't define docdir
 [[ ! -n "$docdir" ]] && docdir='${datadir}/doc/${PACKAGE_TARNAME}'
 AC_SUBST([docdir])
diff --git a/src/ldap_driver.c b/src/ldap_driver.c
index b9161fe..dcf65d0 100644
--- a/src/ldap_driver.c
+++ b/src/ldap_driver.c
@@ -823,6 +823,26 @@ nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name)
 	return dns_db_nodefullname(ldapdb->rbtdb, node, name);
 }
 
+#ifdef HAVE_DNS_SERVESTALE
+static isc_result_t
+setservestalettl(dns_db_t *db, dns_ttl_t ttl) {
+	ldapdb_t *ldapdb = (ldapdb_t *) db;
+
+	REQUIRE(VALID_LDAPDB(ldapdb));
+
+	return dns_db_setservestalettl(ldapdb->rbtdb, ttl);
+}
+
+static isc_result_t
+getservestalettl(dns_db_t *db, dns_ttl_t *ttl) {
+	ldapdb_t *ldapdb = (ldapdb_t *) db;
+
+	REQUIRE(VALID_LDAPDB(ldapdb));
+
+	return dns_db_getservestalettl(ldapdb->rbtdb, ttl);
+}
+#endif
+
 static dns_dbmethods_t ldapdb_methods = {
 	attach,
 	detach,
@@ -869,6 +889,10 @@ static dns_dbmethods_t ldapdb_methods = {
 	hashsize,
 	nodefullname,
 	NULL, // getsize method not implemented (related BZ1353563)
+#ifdef HAVE_DNS_SERVESTALE
+	setservestalettl,
+	getservestalettl,
+#endif
 };
 
 isc_result_t ATTR_NONNULLS
-- 
2.20.1