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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "sd-device.h"
#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,
_DUID_TYPE_FORCE_U16 = UINT16_MAX,
} DUIDType;
/* RFC 8415 section 11.1:
* A DUID consists of a 2-octet type code represented in network byte order, followed by a variable number of
* octets that make up the actual identifier. The length of the DUID (not including the type code) is at
* least 1 octet and at most 128 octets. */
#define MAX_DUID_DATA_LEN 128
#define MAX_DUID_LEN (sizeof(be16_t) + MAX_DUID_DATA_LEN)
/* 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[];
} _packed_ llt;
struct {
/* DUID_TYPE_EN */
be32_t pen;
uint8_t id[];
} _packed_ en;
struct {
/* DUID_TYPE_LL */
be16_t htype;
uint8_t haddr[];
} _packed_ ll;
struct {
/* DUID_TYPE_UUID */
sd_id128_t uuid;
} _packed_ uuid;
struct {
uint8_t data[MAX_DUID_DATA_LEN];
} _packed_ raw;
};
} _packed_;
int dhcp_identifier_set_duid_llt(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
usec_t t,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_duid_ll(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_duid_en(struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid_raw(
DUIDType duid_type,
const uint8_t *buf,
size_t buf_len,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_iaid(
sd_device *dev,
const struct hw_addr_data *hw_addr,
bool legacy_unstable_byteorder,
void *ret);
const char *duid_type_to_string(DUIDType t) _const_;
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