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718e3744 | 1 | /* IP forward control by sysctl function. |
2 | * Copyright (C) 1997, 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #ifdef NRL | |
25 | #include <netinet6/in6.h> | |
26 | #endif /* NRL */ | |
27 | ||
28 | #include "log.h" | |
29 | ||
30 | #define MIB_SIZ 4 | |
31 | ||
32 | /* IPv4 forwarding control MIB. */ | |
33 | int mib[MIB_SIZ] = | |
34 | { | |
35 | CTL_NET, | |
36 | PF_INET, | |
37 | IPPROTO_IP, | |
38 | IPCTL_FORWARDING | |
39 | }; | |
40 | ||
41 | int | |
42 | ipforward () | |
43 | { | |
44 | int len; | |
45 | int ipforwarding = 0; | |
46 | ||
47 | len = sizeof ipforwarding; | |
48 | if (sysctl (mib, MIB_SIZ, &ipforwarding, &len, 0, 0) < 0) | |
49 | { | |
50 | zlog_warn ("Can't get ipforwarding value"); | |
51 | return -1; | |
52 | } | |
53 | return ipforwarding; | |
54 | } | |
55 | ||
56 | int | |
57 | ipforward_on () | |
58 | { | |
59 | int len; | |
60 | int ipforwarding = 1; | |
61 | ||
62 | len = sizeof ipforwarding; | |
63 | if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) | |
64 | { | |
65 | zlog_warn ("Can't set ipforwarding on"); | |
66 | return -1; | |
67 | } | |
68 | return ipforwarding; | |
69 | } | |
70 | ||
71 | int | |
72 | ipforward_off () | |
73 | { | |
74 | int len; | |
75 | int ipforwarding = 0; | |
76 | ||
77 | len = sizeof ipforwarding; | |
78 | if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) | |
79 | { | |
80 | zlog_warn ("Can't set ipforwarding on"); | |
81 | return -1; | |
82 | } | |
83 | return ipforwarding; | |
84 | } | |
85 | ||
86 | #ifdef HAVE_IPV6 | |
87 | ||
88 | /* IPv6 forwarding control MIB. */ | |
89 | int mib_ipv6[MIB_SIZ] = | |
90 | { | |
91 | CTL_NET, | |
92 | PF_INET6, | |
93 | #if defined(KAME) || (defined(__bsdi__) && _BSDI_VERSION >= 199802 ) || defined(NRL) | |
94 | IPPROTO_IPV6, | |
95 | IPV6CTL_FORWARDING | |
96 | #else /* NOT KAME */ | |
97 | IPPROTO_IP, | |
98 | IP6CTL_FORWARDING | |
99 | #endif /* KAME */ | |
100 | }; | |
101 | ||
102 | int | |
103 | ipforward_ipv6 () | |
104 | { | |
105 | int len; | |
106 | int ip6forwarding = 0; | |
107 | ||
108 | len = sizeof ip6forwarding; | |
109 | if (sysctl (mib_ipv6, MIB_SIZ, &ip6forwarding, &len, 0, 0) < 0) | |
110 | { | |
111 | zlog_warn ("can't get ip6forwarding value"); | |
112 | return -1; | |
113 | } | |
114 | return ip6forwarding; | |
115 | } | |
116 | ||
117 | int | |
118 | ipforward_ipv6_on () | |
119 | { | |
120 | int len; | |
121 | int ip6forwarding = 1; | |
122 | ||
123 | len = sizeof ip6forwarding; | |
124 | if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0) | |
125 | { | |
126 | zlog_warn ("can't get ip6forwarding value"); | |
127 | return -1; | |
128 | } | |
129 | return ip6forwarding; | |
130 | } | |
131 | ||
132 | int | |
133 | ipforward_ipv6_off () | |
134 | { | |
135 | int len; | |
136 | int ip6forwarding = 0; | |
137 | ||
138 | len = sizeof ip6forwarding; | |
139 | if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0) | |
140 | { | |
141 | zlog_warn ("can't get ip6forwarding value"); | |
142 | return -1; | |
143 | } | |
144 | return ip6forwarding; | |
145 | } | |
146 | #endif /* HAVE_IPV6 */ |