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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include <linux/netlink.h>
#include "sd-netlink.h"
#include "list.h"
#include "netlink-types.h"
#include "prioq.h"
#include "refcnt.h"
#define RTNL_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
#define RTNL_WQUEUE_MAX 1024
#define RTNL_RQUEUE_MAX 64*1024
#define RTNL_CONTAINER_DEPTH 32
struct reply_callback {
sd_netlink_message_handler_t callback;
usec_t timeout;
uint64_t serial;
unsigned prioq_idx;
};
struct match_callback {
sd_netlink_message_handler_t callback;
uint16_t type;
LIST_FIELDS(struct match_callback, match_callbacks);
};
typedef enum NetlinkSlotType {
NETLINK_REPLY_CALLBACK,
NETLINK_MATCH_CALLBACK,
_NETLINK_SLOT_INVALID = -1,
} NetlinkSlotType;
struct sd_netlink_slot {
unsigned n_ref;
sd_netlink *netlink;
void *userdata;
sd_netlink_destroy_t destroy_callback;
NetlinkSlotType type:2;
bool floating:1;
char *description;
LIST_FIELDS(sd_netlink_slot, slots);
union {
struct reply_callback reply_callback;
struct match_callback match_callback;
};
};
struct sd_netlink {
RefCount n_ref;
int fd;
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sockaddr;
int protocol;
Hashmap *broadcast_group_refs;
bool broadcast_group_dont_leave:1; /* until we can rely on 4.2 */
sd_netlink_message **rqueue;
unsigned rqueue_size;
size_t rqueue_allocated;
sd_netlink_message **rqueue_partial;
unsigned rqueue_partial_size;
size_t rqueue_partial_allocated;
struct nlmsghdr *rbuffer;
size_t rbuffer_allocated;
bool processing:1;
uint32_t serial;
struct Prioq *reply_callbacks_prioq;
Hashmap *reply_callbacks;
LIST_HEAD(struct match_callback, match_callbacks);
LIST_HEAD(sd_netlink_slot, slots);
pid_t original_pid;
sd_event_source *io_event_source;
sd_event_source *time_event_source;
sd_event_source *exit_event_source;
sd_event *event;
};
struct netlink_attribute {
size_t offset; /* offset from hdr to attribute */
bool nested:1;
bool net_byteorder:1;
};
struct netlink_container {
const struct NLTypeSystem *type_system; /* the type system of the container */
size_t offset; /* offset from hdr to the start of the container */
struct netlink_attribute *attributes;
unsigned short n_attributes; /* number of attributes in container */
};
struct sd_netlink_message {
RefCount n_ref;
sd_netlink *rtnl;
int protocol;
struct nlmsghdr *hdr;
struct netlink_container containers[RTNL_CONTAINER_DEPTH];
unsigned n_containers; /* number of containers */
bool sealed:1;
bool broadcast:1;
sd_netlink_message *next; /* next in a chain of multi-part messages */
};
int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type);
int message_new_empty(sd_netlink *rtnl, sd_netlink_message **ret);
int netlink_open_family(sd_netlink **ret, int family);
int socket_open(int family);
int socket_bind(sd_netlink *nl);
int socket_broadcast_group_ref(sd_netlink *nl, unsigned group);
int socket_broadcast_group_unref(sd_netlink *nl, unsigned group);
int socket_write_message(sd_netlink *nl, sd_netlink_message *m);
int socket_read_message(sd_netlink *nl);
int rtnl_rqueue_make_room(sd_netlink *rtnl);
int rtnl_rqueue_partial_make_room(sd_netlink *rtnl);
/* Make sure callbacks don't destroy the rtnl connection */
#define NETLINK_DONT_DESTROY(rtnl) \
_cleanup_(sd_netlink_unrefp) _unused_ sd_netlink *_dont_destroy_##rtnl = sd_netlink_ref(rtnl)
|
