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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 along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #if !defined(GNU_LINUX) | |
24 | ||
25 | #include "privs.h" | |
26 | #include "zebra/ipforward.h" | |
27 | #include "zebra/zebra_errors.h" | |
28 | ||
29 | #include "log.h" | |
30 | #include "lib_errors.h" | |
31 | ||
32 | #define MIB_SIZ 4 | |
33 | ||
34 | extern struct zebra_privs_t zserv_privs; | |
35 | ||
36 | /* IPv4 forwarding control MIB. */ | |
37 | int mib[MIB_SIZ] = {CTL_NET, PF_INET, IPPROTO_IP, IPCTL_FORWARDING}; | |
38 | ||
39 | int ipforward(void) | |
40 | { | |
41 | size_t len; | |
42 | int ipforwarding = 0; | |
43 | ||
44 | len = sizeof(ipforwarding); | |
45 | if (sysctl(mib, MIB_SIZ, &ipforwarding, &len, 0, 0) < 0) { | |
46 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
47 | "Can't get ipforwarding value"); | |
48 | return -1; | |
49 | } | |
50 | return ipforwarding; | |
51 | } | |
52 | ||
53 | int ipforward_on(void) | |
54 | { | |
55 | size_t len; | |
56 | int ipforwarding = 1; | |
57 | ||
58 | len = sizeof(ipforwarding); | |
59 | frr_with_privs(&zserv_privs) { | |
60 | if (sysctl(mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) { | |
61 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
62 | "Can't set ipforwarding on"); | |
63 | return -1; | |
64 | } | |
65 | } | |
66 | return ipforwarding; | |
67 | } | |
68 | ||
69 | int ipforward_off(void) | |
70 | { | |
71 | size_t len; | |
72 | int ipforwarding = 0; | |
73 | ||
74 | len = sizeof(ipforwarding); | |
75 | frr_with_privs(&zserv_privs) { | |
76 | if (sysctl(mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) { | |
77 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
78 | "Can't set ipforwarding on"); | |
79 | return -1; | |
80 | } | |
81 | } | |
82 | return ipforwarding; | |
83 | } | |
84 | ||
85 | /* IPv6 forwarding control MIB. */ | |
86 | int mib_ipv6[MIB_SIZ] = {CTL_NET, PF_INET6, | |
87 | #if defined(BSD_V6_SYSCTL) | |
88 | IPPROTO_IPV6, IPV6CTL_FORWARDING | |
89 | #else /* NOT BSD_V6_SYSCTL */ | |
90 | IPPROTO_IP, IP6CTL_FORWARDING | |
91 | #endif /* BSD_V6_SYSCTL */ | |
92 | }; | |
93 | ||
94 | int ipforward_ipv6(void) | |
95 | { | |
96 | size_t len; | |
97 | int ip6forwarding = 0; | |
98 | ||
99 | len = sizeof(ip6forwarding); | |
100 | frr_with_privs(&zserv_privs) { | |
101 | if (sysctl(mib_ipv6, MIB_SIZ, &ip6forwarding, &len, 0, 0) < 0) { | |
102 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
103 | "can't get ip6forwarding value"); | |
104 | return -1; | |
105 | } | |
106 | } | |
107 | return ip6forwarding; | |
108 | } | |
109 | ||
110 | int ipforward_ipv6_on(void) | |
111 | { | |
112 | size_t len; | |
113 | int ip6forwarding = 1; | |
114 | ||
115 | len = sizeof(ip6forwarding); | |
116 | frr_with_privs(&zserv_privs) { | |
117 | if (sysctl(mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) | |
118 | < 0) { | |
119 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
120 | "can't get ip6forwarding value"); | |
121 | return -1; | |
122 | } | |
123 | } | |
124 | return ip6forwarding; | |
125 | } | |
126 | ||
127 | int ipforward_ipv6_off(void) | |
128 | { | |
129 | size_t len; | |
130 | int ip6forwarding = 0; | |
131 | ||
132 | len = sizeof(ip6forwarding); | |
133 | frr_with_privs(&zserv_privs) { | |
134 | if (sysctl(mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) | |
135 | < 0) { | |
136 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
137 | "can't get ip6forwarding value"); | |
138 | return -1; | |
139 | } | |
140 | } | |
141 | return ip6forwarding; | |
142 | } | |
143 | ||
144 | #endif /* !defined(GNU_LINUX) */ |