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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
commit | 69c6a41ffb878ef98c9378ed4b1634a404cfaa7f (patch) | |
tree | b2a4f704565d62fbb129ab9dc3b35977c50e6e7f /src/libknot/wire.h | |
parent | Initial commit. (diff) | |
download | knot-d02c1c4ad3b5dddb2ceca2c451a5b417770810ef.tar.xz knot-d02c1c4ad3b5dddb2ceca2c451a5b417770810ef.zip |
Adding upstream version 2.7.6.upstream/2.7.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/libknot/wire.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/libknot/wire.h b/src/libknot/wire.h new file mode 100644 index 0000000..5f69d9f --- /dev/null +++ b/src/libknot/wire.h @@ -0,0 +1,153 @@ +/* Copyright (C) 2018 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 <http://www.gnu.org/licenses/>. + */ +/*! + * \file + * + * \brief Wire integer operations. + * + * \addtogroup wire + * @{ + */ + +#pragma once + +#include <assert.h> +#include <stdint.h> +#include <string.h> + +#include "libknot/endian.h" + +/*! + * \brief Reads 2 bytes from the wireformat data. + * + * \param pos Data to read the 2 bytes from. + * + * \return The 2 bytes read, in host byte order. + */ +inline static uint16_t knot_wire_read_u16(const uint8_t *pos) +{ + assert(pos); + uint16_t result; + memcpy(&result, pos, sizeof(result)); + return be16toh(result); +} + +/*! + * \brief Reads 4 bytes from the wireformat data. + * + * \param pos Data to read the 4 bytes from. + * + * \return The 4 bytes read, in host byte order. + */ +inline static uint32_t knot_wire_read_u32(const uint8_t *pos) +{ + assert(pos); + uint32_t result; + memcpy(&result, pos, sizeof(result)); + return be32toh(result); +} + +/*! + * \brief Reads 6 bytes from the wireformat data. + * + * \param pos Data to read the 6 bytes from. + * + * \return The 6 bytes read, in host byte order. + */ +inline static uint64_t knot_wire_read_u48(const uint8_t *pos) +{ + assert(pos); + uint64_t input = 0; + memcpy((uint8_t *)&input + 1, pos, 6); + return be64toh(input) >> 8; +} + +/*! + * \brief Read 8 bytes from the wireformat data. + * + * \param pos Data to read the 8 bytes from. + * + * \return The 8 bytes read, in host byte order. + */ +inline static uint64_t knot_wire_read_u64(const uint8_t *pos) +{ + assert(pos); + uint64_t result; + memcpy(&result, pos, sizeof(result)); + return be64toh(result); +} + +/*! + * \brief Writes 2 bytes in wireformat. + * + * The data are stored in network byte order (big endian). + * + * \param pos Position where to put the 2 bytes. + * \param data Data to put. + */ +inline static void knot_wire_write_u16(uint8_t *pos, uint16_t data) +{ + assert(pos); + uint16_t beval = htobe16(data); + memcpy(pos, &beval, sizeof(beval)); +} + +/*! + * \brief Writes 4 bytes in wireformat. + * + * The data are stored in network byte order (big endian). + * + * \param pos Position where to put the 4 bytes. + * \param data Data to put. + */ +inline static void knot_wire_write_u32(uint8_t *pos, uint32_t data) +{ + assert(pos); + uint32_t beval = htobe32(data); + memcpy(pos, &beval, sizeof(beval)); +} + +/*! + * \brief Writes 6 bytes in wireformat. + * + * The data are stored in network byte order (big endian). + * + * \param pos Position where to put the 4 bytes. + * \param data Data to put. + */ +inline static void knot_wire_write_u48(uint8_t *pos, uint64_t data) +{ + assert(pos); + uint64_t swapped = htobe64(data << 8); + memcpy(pos, (uint8_t *)&swapped + 1, 6); +} + +/*! + * \brief Writes 8 bytes in wireformat. + * + * The data are stored in network byte order (big endian). + * + * \param pos Position where to put the 8 bytes. + * \param data Data to put. + */ +inline static void knot_wire_write_u64(uint8_t *pos, uint64_t data) +{ + assert(pos); + uint64_t beval = htobe64(data); + memcpy(pos, &beval, sizeof(beval)); +} + +/*! @} */ |