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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright (c) 2016 Jonas Johansson <jonasj76@gmail.com>
*/
/**
* @ingroup link
* @defgroup ppp PPP
*
* @details
* \b Link Type Name: "ppp"
*
* @route_doc{link_ppp, PPP Documentation}
* @{
*/
#include "nl-default.h"
#include <netlink/route/link/ppp.h>
#include <netlink/netlink.h>
#include "nl-route.h"
#include "link-api.h"
/** @cond SKIP */
#define PPP_ATTR_FD (1<<0)
struct ppp_info
{
int32_t pi_fd;
uint32_t ce_mask;
};
/** @endcond */
static struct nla_policy ppp_nl_policy[IFLA_PPP_MAX+1] = {
[IFLA_PPP_DEV_FD] = { .type = NLA_S32 },
};
static int ppp_alloc(struct rtnl_link *link)
{
struct ppp_info *info;
if (link->l_info)
memset(link->l_info, 0, sizeof(*info));
else {
if ((info = calloc(1, sizeof(*info))) == NULL)
return -NLE_NOMEM;
link->l_info = info;
}
return 0;
}
static int ppp_parse(struct rtnl_link *link, struct nlattr *data,
struct nlattr *xstats)
{
struct nlattr *tb[IFLA_PPP_MAX+1];
struct ppp_info *info;
int err;
NL_DBG(3, "Parsing PPP link info\n");
if ((err = nla_parse_nested(tb, IFLA_PPP_MAX, data, ppp_nl_policy)) < 0)
goto errout;
if ((err = ppp_alloc(link)) < 0)
goto errout;
info = link->l_info;
if (tb[IFLA_PPP_DEV_FD]) {
info->pi_fd = nla_get_s32(tb[IFLA_PPP_DEV_FD]);
info->ce_mask |= PPP_ATTR_FD;
}
err = 0;
errout:
return err;
}
static void ppp_free(struct rtnl_link *link)
{
free(link->l_info);
link->l_info = NULL;
}
static int ppp_clone(struct rtnl_link *dst, struct rtnl_link *src)
{
struct ppp_info *vdst, *vsrc = src->l_info;
int err;
dst->l_info = NULL;
if ((err = rtnl_link_set_type(dst, "ppp")) < 0)
return err;
vdst = dst->l_info;
if (!vdst || !vsrc)
return -NLE_NOMEM;
memcpy(vdst, vsrc, sizeof(struct ppp_info));
return 0;
}
static int ppp_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
{
struct ppp_info *info = link->l_info;
struct nlattr *data;
if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
return -NLE_MSGSIZE;
if (info->ce_mask & PPP_ATTR_FD)
NLA_PUT_S32(msg, IFLA_PPP_DEV_FD, info->pi_fd);
nla_nest_end(msg, data);
nla_put_failure:
return 0;
}
static struct rtnl_link_info_ops ppp_info_ops = {
.io_name = "ppp",
.io_alloc = ppp_alloc,
.io_parse = ppp_parse,
.io_clone = ppp_clone,
.io_put_attrs = ppp_put_attrs,
.io_free = ppp_free,
};
/** @cond SKIP */
#define IS_PPP_LINK_ASSERT(link) \
if ((link)->l_info_ops != &ppp_info_ops) { \
APPBUG("Link is not a PPP link. set type \"ppp\" first."); \
return -NLE_OPNOTSUPP; \
}
/** @endcond */
/**
* @name PPP Object
* @{
*/
/**
* Allocate link object of type PPP
*
* @return Allocated link object or NULL.
*/
struct rtnl_link *rtnl_link_ppp_alloc(void)
{
struct rtnl_link *link;
if (!(link = rtnl_link_alloc()))
return NULL;
if (rtnl_link_set_type(link, "ppp") < 0) {
rtnl_link_put(link);
return NULL;
}
return link;
}
/**
* Set PPP file descriptor
* @arg link Link object
* @arg flags PPP file descriptor
*
* @return 0 on success or a negative error code.
*/
int rtnl_link_ppp_set_fd(struct rtnl_link *link, int32_t fd)
{
struct ppp_info *info = link->l_info;
IS_PPP_LINK_ASSERT(link);
info->pi_fd |= fd;
info->ce_mask |= PPP_ATTR_FD;
return 0;
}
/**
* Get PPP file descriptor
* @arg link Link object
*
* @return PPP file descriptor, 0 if not set or a negative error code.
*/
int rtnl_link_ppp_get_fd(struct rtnl_link *link, int32_t *fd)
{
struct ppp_info *info = link->l_info;
IS_PPP_LINK_ASSERT(link);
if (!(info->ce_mask & PPP_ATTR_FD))
return -NLE_NOATTR;
if (fd)
*fd = info->pi_fd;
return 0;
}
/** @} */
static void _nl_init ppp_init(void)
{
rtnl_link_register_info(&ppp_info_ops);
}
static void _nl_exit ppp_exit(void)
{
rtnl_link_unregister_info(&ppp_info_ops);
}
/** @} */
|
