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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "sd-id128.h"
#include "ether-addr-util.h"
#include "macro.h"
#include "sparse-endian.h"
#include "time-util.h"
#include "unaligned.h"
#define SYSTEMD_PEN 43793
typedef enum DUIDType {
DUID_TYPE_LLT = 1,
DUID_TYPE_EN = 2,
DUID_TYPE_LL = 3,
DUID_TYPE_UUID = 4,
_DUID_TYPE_MAX,
_DUID_TYPE_INVALID = -EINVAL,
} DUIDType;
/* RFC 3315 section 9.1:
* A DUID can be no more than 128 octets long (not including the type code).
*/
#define MAX_DUID_LEN 128
/* https://tools.ietf.org/html/rfc3315#section-9.1 */
struct duid {
be16_t type;
union {
struct {
/* DUID_TYPE_LLT */
be16_t htype;
be32_t time;
uint8_t haddr[0];
} _packed_ llt;
struct {
/* DUID_TYPE_EN */
be32_t pen;
uint8_t id[8];
} _packed_ en;
struct {
/* DUID_TYPE_LL */
be16_t htype;
uint8_t haddr[0];
} _packed_ ll;
struct {
/* DUID_TYPE_UUID */
sd_id128_t uuid;
} _packed_ uuid;
struct {
uint8_t data[MAX_DUID_LEN];
} _packed_ raw;
};
} _packed_;
int dhcp_validate_duid_len(DUIDType duid_type, size_t duid_len, bool strict);
int dhcp_identifier_set_duid_en(bool test_mode, struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid(
DUIDType duid_type,
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
usec_t llt_time,
bool test_mode,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_iaid(
int ifindex,
const struct hw_addr_data *hw_addr,
bool legacy_unstable_byteorder,
bool use_mac,
void *ret);
const char *duid_type_to_string(DUIDType t) _const_;
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