1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "sd-device.h"
#include "sd-dhcp-duid.h"
#include "sd-id128.h"
#include "ether-addr-util.h"
#include "macro.h"
#include "sparse-endian.h"
#define SYSTEMD_PEN 43793
typedef enum DUIDType {
DUID_TYPE_LLT = SD_DUID_TYPE_LLT,
DUID_TYPE_EN = SD_DUID_TYPE_EN,
DUID_TYPE_LL = SD_DUID_TYPE_LL,
DUID_TYPE_UUID = SD_DUID_TYPE_UUID,
_DUID_TYPE_MAX,
_DUID_TYPE_INVALID = -EINVAL,
} 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 MIN_DUID_DATA_LEN 1
#define MAX_DUID_DATA_LEN 128
#define MIN_DUID_LEN (sizeof(be16_t) + MIN_DUID_DATA_LEN)
#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;
uint8_t data[MAX_DUID_DATA_LEN];
};
} _packed_;
typedef struct sd_dhcp_duid {
size_t size;
union {
struct duid duid;
uint8_t raw[MAX_DUID_LEN];
};
} sd_dhcp_duid;
static inline bool duid_size_is_valid(size_t size) {
return size >= MIN_DUID_LEN && size <= MAX_DUID_LEN;
}
static inline bool duid_data_size_is_valid(size_t size) {
return size >= MIN_DUID_DATA_LEN && size <= MAX_DUID_DATA_LEN;
}
const char *duid_type_to_string(DUIDType t) _const_;
int dhcp_duid_to_string_internal(uint16_t type, const void *data, size_t data_size, char **ret);
int dhcp_identifier_set_iaid(
sd_device *dev,
const struct hw_addr_data *hw_addr,
bool legacy_unstable_byteorder,
void *ret);
|
