zebra/ipforward_sysctl.c

   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 */