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Diffstat (limited to 'src/libknot/xdp/bpf-consts.h')
| -rw-r--r-- | src/libknot/xdp/bpf-consts.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/libknot/xdp/bpf-consts.h b/src/libknot/xdp/bpf-consts.h new file mode 100644 index 0000000..3b92cbb --- /dev/null +++ b/src/libknot/xdp/bpf-consts.h @@ -0,0 +1,57 @@ +/* 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 filter configuration constants. + * + * \addtogroup xdp + * @{ + */ + +#pragma once + +#include <linux/types.h> + +#define KNOT_XDP_PKT_ALIGNMENT 2 /*!< Fix for misaligned access to packet structures. */ + +/*! \brief XDP filter configuration flags. */ +typedef enum { + KNOT_XDP_FILTER_ON = 1 << 0, /*!< Filter enabled. */ + KNOT_XDP_FILTER_UDP = 1 << 1, /*!< Apply filter to UDP. */ + KNOT_XDP_FILTER_TCP = 1 << 2, /*!< Apply filter to TCP. */ + KNOT_XDP_FILTER_QUIC = 1 << 3, /*!< Apply filter to QUIC/UDP. */ + KNOT_XDP_FILTER_PASS = 1 << 4, /*!< Pass incoming messages to ports >= port value. */ + KNOT_XDP_FILTER_DROP = 1 << 5, /*!< Drop incoming messages to ports >= port value. */ + KNOT_XDP_FILTER_ROUTE = 1 << 6, /*!< Consider routing information from kernel. */ +} knot_xdp_filter_flag_t; + +/*! \brief XDP map item for the filter configuration. */ +typedef struct knot_xdp_opts knot_xdp_opts_t; +struct knot_xdp_opts { + __u16 flags; /*!< XDP filter flags \a knot_xdp_filter_flag_t. */ + __u16 udp_port; /*!< UDP/TCP port to listen on. */ + __u16 quic_port; /*!< QUIC/UDP port to listen on. */ +} __attribute__((packed)); + +/*! \brief Additional information from the filter. */ +typedef struct knot_xdp_info knot_xdp_info_t; +struct knot_xdp_info { + __u16 out_if_index; /*!< Index of the output interface (if routing enabled). */ +}; + +/*! @} */ |