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/* 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
#ifdef ENABLE_XDP
#include "knot/query/layer.h"
#include "libknot/xdp/xdp.h"
#define XDP_BATCHLEN 32 /*!< XDP receive batch size. */
struct xdp_handle_ctx;
struct server;
/*!
* \brief Initialize XDP packet handling context.
*/
struct xdp_handle_ctx *xdp_handle_init(struct server *server, knot_xdp_socket_t *sock);
/*!
* \brief Deinitialize XDP packet handling context.
*/
void xdp_handle_free(struct xdp_handle_ctx *ctx);
/*!
* \brief Receive packets thru XDP socket.
*/
int xdp_handle_recv(struct xdp_handle_ctx *ctx);
/*!
* \brief Answer packets including DNS layers.
*
* \warning In case of TCP, this also sends some packets, e.g. ACK.
*/
void xdp_handle_msgs(struct xdp_handle_ctx *ctx, knot_layer_t *layer,
struct server *server, unsigned thread_id);
/*!
* \brief Send packets thru XDP socket.
*/
void xdp_handle_send(struct xdp_handle_ctx *ctx);
/*!
* \brief Check for old TCP connections and close/reset them.
*/
void xdp_handle_sweep(struct xdp_handle_ctx *ctx);
/*!
* \brief Update configuration parameters of running ctx.
*/
void xdp_handle_reconfigure(struct xdp_handle_ctx *ctx);
#endif // ENABLE_XDP
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