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
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright 2013 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <linux/netlink.h>
#include "refcnt.h"
#include "prioq.h"
#include "list.h"
#include "sd-rtnl.h"
#include "rtnl-types.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_rtnl_message_handler_t callback;
void *userdata;
usec_t timeout;
uint64_t serial;
unsigned prioq_idx;
};
struct match_callback {
sd_rtnl_message_handler_t callback;
uint16_t type;
void *userdata;
LIST_FIELDS(struct match_callback, match_callbacks);
};
struct sd_rtnl {
RefCount n_ref;
int fd;
union {
struct sockaddr sa;
struct sockaddr_nl nl;
} sockaddr;
sd_rtnl_message **rqueue;
unsigned rqueue_size;
sd_rtnl_message **wqueue;
unsigned wqueue_size;
bool processing:1;
uint32_t serial;
struct Prioq *reply_callbacks_prioq;
Hashmap *reply_callbacks;
LIST_HEAD(struct match_callback, match_callbacks);
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 sd_rtnl_message {
RefCount n_ref;
sd_rtnl *rtnl;
struct nlmsghdr *hdr;
const struct NLTypeSystem *(container_type_system[RTNL_CONTAINER_DEPTH]); /* the type of the container and all its parents */
size_t container_offsets[RTNL_CONTAINER_DEPTH]; /* offset from hdr to each container's start */
unsigned n_containers; /* number of containers */
size_t next_rta_offset; /* offset from hdr to next rta */
size_t *rta_offset_tb[RTNL_CONTAINER_DEPTH];
unsigned short rta_tb_size[RTNL_CONTAINER_DEPTH];
bool sealed:1;
};
int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type);
int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m);
int socket_read_message(sd_rtnl *nl, sd_rtnl_message **ret);
int rtnl_message_read_internal(sd_rtnl_message *m, unsigned short type, void **data);
int rtnl_message_parse(sd_rtnl_message *m,
size_t **rta_offset_tb,
unsigned short *rta_tb_size,
int max,
struct rtattr *rta,
unsigned int rt_len);
/* Make sure callbacks don't destroy the rtnl connection */
#define RTNL_DONT_DESTROY(rtnl) \
_cleanup_rtnl_unref_ _unused_ sd_rtnl *_dont_destroy_##rtnl = sd_rtnl_ref(rtnl)
|
