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
|
/* IP forward control by sysctl function.
* Copyright (C) 1997, 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "privs.h"
#include "zebra/ipforward.h"
#include "log.h"
#define MIB_SIZ 4
extern struct zebra_privs_t zserv_privs;
/* IPv4 forwarding control MIB. */
int mib[MIB_SIZ] =
{
CTL_NET,
PF_INET,
IPPROTO_IP,
IPCTL_FORWARDING
};
int
ipforward (void)
{
size_t len;
int ipforwarding = 0;
len = sizeof ipforwarding;
if (sysctl (mib, MIB_SIZ, &ipforwarding, &len, 0, 0) < 0)
{
zlog_warn ("Can't get ipforwarding value");
return -1;
}
return ipforwarding;
}
int
ipforward_on (void)
{
size_t len;
int ipforwarding = 1;
len = sizeof ipforwarding;
if (zserv_privs.change(ZPRIVS_RAISE))
zlog_err("Can't raise privileges");
if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
zlog_warn ("Can't set ipforwarding on");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
return ipforwarding;
}
int
ipforward_off (void)
{
size_t len;
int ipforwarding = 0;
len = sizeof ipforwarding;
if (zserv_privs.change(ZPRIVS_RAISE))
zlog_err("Can't raise privileges");
if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
zlog_warn ("Can't set ipforwarding on");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
return ipforwarding;
}
/* IPv6 forwarding control MIB. */
int mib_ipv6[MIB_SIZ] =
{
CTL_NET,
PF_INET6,
#if defined(KAME)
IPPROTO_IPV6,
IPV6CTL_FORWARDING
#else /* NOT KAME */
IPPROTO_IP,
IP6CTL_FORWARDING
#endif /* KAME */
};
int
ipforward_ipv6 (void)
{
size_t len;
int ip6forwarding = 0;
len = sizeof ip6forwarding;
if (zserv_privs.change(ZPRIVS_RAISE))
zlog_err("Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, &ip6forwarding, &len, 0, 0) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
return ip6forwarding;
}
int
ipforward_ipv6_on (void)
{
size_t len;
int ip6forwarding = 1;
len = sizeof ip6forwarding;
if (zserv_privs.change(ZPRIVS_RAISE))
zlog_err("Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
return ip6forwarding;
}
int
ipforward_ipv6_off (void)
{
size_t len;
int ip6forwarding = 0;
len = sizeof ip6forwarding;
if (zserv_privs.change(ZPRIVS_RAISE))
zlog_err("Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
return ip6forwarding;
}
|
