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/* 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 GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, 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 (NULL, LOG_ERR, "Can't raise privileges");
if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
zlog_warn ("Can't set ipforwarding on");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_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 (NULL, LOG_ERR, "Can't raise privileges");
if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
zlog_warn ("Can't set ipforwarding on");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
return ipforwarding;
}
#ifdef HAVE_IPV6
/* 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 (NULL, LOG_ERR, "Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, &ip6forwarding, &len, 0, 0) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_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 (NULL, LOG_ERR, "Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_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 (NULL, LOG_ERR, "Can't raise privileges");
if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0)
{
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
zlog_warn ("can't get ip6forwarding value");
return -1;
}
if (zserv_privs.change(ZPRIVS_LOWER))
zlog (NULL, LOG_ERR, "Can't lower privileges");
return ip6forwarding;
}
#endif /* HAVE_IPV6 */
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