audit: fix audit-num default value issue.

src/dns_conf/dns_conf.c

@@ -356,8 +356,11 @@ static void _dns_conf_default_value_init(void)
 	dns_conf.cache_checkpoint_time = DNS_DEFAULT_CHECKPOINT_TIME;
 	dns_conf.cache_persist = 2;
 	dns_conf.log_num = 8;
-	dns_conf.log_size = 1024 * 1024;
+	dns_conf.log_size = 1024 * 128;
 	dns_conf.log_level = TLOG_ERROR;
+	dns_conf.audit_num = 2;
+	dns_conf.audit_file_mode = 0640;
+	dns_conf.audit_size = 1024 * 128;
 	dns_conf.resolv_hostname = 1;
 	dns_conf.cachesize = -1;
 	dns_conf.cache_max_memsize = -1;

test/cases/test-audit.cc

@@ -0,0 +1,77 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2025 Ruilin Peng (Nick) <[email protected]>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "client.h"
+#include "include/utils.h"
+#include "server.h"
+#include "smartdns/dns.h"
+#include "gtest/gtest.h"
+
+class Audit : public ::testing::Test
+{
+  protected:
+	virtual void SetUp() {}
+	virtual void TearDown() {}
+};
+
+TEST_F(Audit, log)
+{
+	smartdns::MockServer server_upstream;
+	smartdns::Server server;
+
+	Defer
+	{
+		unlink("/tmp/audit.log");
+	};
+
+	server_upstream.Start("udp://0.0.0.0:61053", [](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype != DNS_T_A) {
+			return smartdns::SERVER_REQUEST_SOA;
+		}
+
+		smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 611);
+		return smartdns::SERVER_REQUEST_OK;
+	});
+
+	server.Start(R"""(bind [::]:60053
+ audit-file /tmp/audit.log
+ audit-enable yes
+ server 127.0.0.1:61053
+ )""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("a.com", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+
+	std::ifstream audit_file("/tmp/audit.log");
+	std::string line;
+	bool found = false;
+	while (std::getline(audit_file, line)) {
+		if (line.find("a.com") != std::string::npos) {
+			found = true;
+			break;
+		}
+	}
+
+	audit_file.close();
+
+	ASSERT_TRUE(found) << "Audit log for a.com not found";
+}