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Diffstat (limited to '')
-rw-r--r-- | src/knot/server/udp-handler.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/knot/server/udp-handler.h b/src/knot/server/udp-handler.h new file mode 100644 index 0000000..b09e43e --- /dev/null +++ b/src/knot/server/udp-handler.h @@ -0,0 +1,43 @@ +/* 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); |