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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/>.
*/
/*!
* \file
*
* \brief XDP message description.
*
* \addtogroup xdp
* @{
*/
#pragma once
#include <stdint.h>
#include <linux/if_ether.h>
#include <netinet/in.h>
#include <sys/uio.h>
/*! \brief Message flags. */
typedef enum {
KNOT_XDP_MSG_IPV6 = (1 << 0), /*!< This packet is a IPv6 (IPv4 otherwise). */
KNOT_XDP_MSG_TCP = (1 << 1), /*!< This packet is a TCP (UDP otherwise). */
KNOT_XDP_MSG_SYN = (1 << 2), /*!< SYN flag set (TCP only). */
KNOT_XDP_MSG_ACK = (1 << 3), /*!< ACK flag set (TCP only). */
KNOT_XDP_MSG_FIN = (1 << 4), /*!< FIN flag set (TCP only). */
KNOT_XDP_MSG_RST = (1 << 5), /*!< RST flag set (TCP only). */
KNOT_XDP_MSG_MSS = (1 << 6), /*!< MSS option in TCP header (TCP only). */
KNOT_XDP_MSG_WSC = (1 << 7), /*!< Window Scale option in TCP header. */
KNOT_XDP_MSG_VLAN = (1 << 8), /*!< This packet will contain VLAN header. */
} knot_xdp_msg_flag_t;
/*! \brief Packet description with src & dst MAC & IP addrs + DNS payload. */
typedef struct knot_xdp_msg {
struct sockaddr_in6 ip_from;
struct sockaddr_in6 ip_to;
uint8_t eth_from[ETH_ALEN];
uint8_t eth_to[ETH_ALEN];
knot_xdp_msg_flag_t flags;
struct iovec payload;
uint32_t seqno;
uint32_t ackno;
uint16_t mss;
uint16_t win;
uint8_t win_scale;
uint16_t vlan_tci;
} knot_xdp_msg_t;
/*! @} */
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