1 files changed, 43 insertions, 0 deletions
diff --git a/src/knot/server/udp-handler.h b/src/knot/server/udp-handler.h
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+++ b/src/knot/server/udp-handler.h
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+/*  Copyright (C) 2021 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/>.
+ */
+
+/*!
+ * \brief UDP sockets threading model.
+ *
+ * The master socket locks one worker thread at a time
+ * and saves events in it's own backing store for asynchronous processing.
+ * The worker threads work asynchronously in thread pool.
+ */
+
+#pragma once
+
+#include "knot/server/dthreads.h"
+
+#define RECVMMSG_BATCHLEN 10 /*!< Default recvmmsg() batch size. */
+
+/*!
+ * \brief UDP handler thread runnable.
+ *
+ * Listen to DNS datagrams in a loop on a UDP socket and
+ * reply to them. This runnable is designed to be used as coherent
+ * and implements cancellation point.
+ *
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EINVAL invalid parameters.
+ */
+int udp_master(dthread_t *thread);