1 files changed, 88 insertions, 0 deletions
diff --git a/src/knot/nameserver/log.h b/src/knot/nameserver/log.h
new file mode 100644
index 0000000..fc79bd3
--- /dev/null
+++ b/src/knot/nameserver/log.h
@@ -0,0 +1,88 @@
+/*  Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program 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.
+
+    This program 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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "contrib/sockaddr.h"
+#include "knot/common/log.h"
+#include "libknot/dname.h"
+
+typedef enum {
+	LOG_OPERATION_AXFR,
+	LOG_OPERATION_IXFR,
+	LOG_OPERATION_NOTIFY,
+	LOG_OPERATION_REFRESH,
+	LOG_OPERATION_UPDATE,
+	LOG_OPERATION_DS_CHECK,
+	LOG_OPERATION_DS_PUSH,
+} log_operation_t;
+
+typedef enum {
+	LOG_DIRECTION_NONE,
+	LOG_DIRECTION_IN,
+	LOG_DIRECTION_OUT,
+} log_direction_t;
+
+static inline const char *log_operation_name(log_operation_t operation)
+{
+	switch (operation) {
+	case LOG_OPERATION_AXFR:
+		return "AXFR";
+	case LOG_OPERATION_IXFR:
+		return "IXFR";
+	case LOG_OPERATION_NOTIFY:
+		return "notify";
+	case LOG_OPERATION_REFRESH:
+		return "refresh";
+	case LOG_OPERATION_UPDATE:
+		return "DDNS";
+	case LOG_OPERATION_DS_CHECK:
+		return "DS check";
+	case LOG_OPERATION_DS_PUSH:
+		return "DS push";
+	default:
+		return "?";
+	}
+}
+
+static inline const char *log_direction_name(log_direction_t direction)
+{
+	switch (direction) {
+	case LOG_DIRECTION_IN:
+		return ", incoming";
+	case LOG_DIRECTION_OUT:
+		return ", outgoing";
+	case LOG_DIRECTION_NONE:
+	default:
+		return "";
+	}
+}
+
+/*!
+ * \brief Generate log message for server communication.
+ *
+ * Example output:
+ *
+ * [example.com] NOTIFY, outgoing, remote 2001:db8::1@53, serial 123
+ */
+#define ns_log(priority, zone, op, dir, remote, pool, fmt, ...) \
+	do { \
+		char address[SOCKADDR_STRLEN] = ""; \
+		sockaddr_tostr(address, sizeof(address), (const struct sockaddr_storage *)remote); \
+		log_fmt_zone(priority, LOG_SOURCE_ZONE, zone, NULL, "%s%s, remote %s%s, " fmt, \
+		             log_operation_name(op), log_direction_name(dir), address, \
+		             (pool) ? " pool" : "", ## __VA_ARGS__); \
+	} while (0)