From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/libsystemd-network/ndisc-protocol.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 src/libsystemd-network/ndisc-protocol.h (limited to 'src/libsystemd-network/ndisc-protocol.h') diff --git a/src/libsystemd-network/ndisc-protocol.h b/src/libsystemd-network/ndisc-protocol.h new file mode 100644 index 0000000..8e403e3 --- /dev/null +++ b/src/libsystemd-network/ndisc-protocol.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include "time-util.h" + +/* RFC 8781: PREF64 or (NAT64 prefix) */ +#define PREF64_SCALED_LIFETIME_MASK 0xfff8 +#define PREF64_PLC_MASK 0x0007 +#define PREF64_MAX_LIFETIME_USEC (65528 * USEC_PER_SEC) + +typedef enum PrefixLengthCode { + PREFIX_LENGTH_CODE_96, + PREFIX_LENGTH_CODE_64, + PREFIX_LENGTH_CODE_56, + PREFIX_LENGTH_CODE_48, + PREFIX_LENGTH_CODE_40, + PREFIX_LENGTH_CODE_32, + _PREFIX_LENGTH_CODE_MAX, + _PREFIX_LENGTH_CODE_INVALID = -EINVAL, +} PrefixLengthCode; + +/* rfc8781: section 4 - Scaled Lifetime: 13-bit unsigned integer. PREFIX_LEN (Prefix Length Code): 3-bit unsigned integer */ +struct nd_opt_prefix64_info { + uint8_t type; + uint8_t length; + uint16_t lifetime_and_plc; + uint8_t prefix[12]; +} __attribute__((__packed__)); + +int pref64_plc_to_prefix_length(uint16_t plc, uint8_t *ret); +int pref64_prefix_length_to_plc(uint8_t prefixlen, uint8_t *ret); -- cgit v1.2.3