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Diffstat (limited to 'src/libknot/xdp/msg.h')
| -rw-r--r-- | src/libknot/xdp/msg.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/libknot/xdp/msg.h b/src/libknot/xdp/msg.h new file mode 100644 index 0000000..f567921 --- /dev/null +++ b/src/libknot/xdp/msg.h @@ -0,0 +1,62 @@ +/* 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; + +/*! @} */ |