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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* (C) Copyright 2004 - 2012 Red Hat, Inc.
* (C) Copyright 2006 Timothee Lecomte <timothee.lecomte@ens.fr>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include <arpa/inet.h>
#include <string.h>
#include "NetworkManagerGeneric.h"
#include "nm-system.h"
#include "NetworkManagerUtils.h"
#include "nm-logging.h"
#include "nm-netlink-compat.h"
#include "nm-netlink-monitor.h"
#include "nm-netlink-utils.h"
/* Because of a bug in libnl, rtnl.h should be included before route.h */
#include <netlink/route/rtnl.h>
#include <netlink/route/addr.h>
#include <netlink/netlink.h>
/*
* nm_generic_enable_loopback
*
* Bring up the loopback interface
*
*/
void nm_generic_enable_loopback (void)
{
struct nl_sock * nlh = NULL;
struct rtnl_addr * addr = NULL;
struct nl_addr * nl_addr = NULL;
guint32 binaddr = 0;
int iface_idx = -1;
int err;
nlh = nm_netlink_get_default_handle ();
if (!nlh)
return;
iface_idx = nm_netlink_iface_to_index ("lo");
if (iface_idx < 0)
return;
nm_system_iface_set_up (iface_idx, TRUE, NULL);
addr = rtnl_addr_alloc ();
if (!addr)
return;
binaddr = htonl (0x7f000001); /* 127.0.0.1 */
nl_addr = nl_addr_build (AF_INET, &binaddr, sizeof(binaddr));
if (!nl_addr)
goto out;
rtnl_addr_set_local (addr, nl_addr);
nl_addr_put (nl_addr);
binaddr = htonl (0x7fffffff); /* 127.255.255.255 */
nl_addr = nl_addr_build (AF_INET, &binaddr, sizeof(binaddr));
if (!nl_addr)
goto out;
rtnl_addr_set_broadcast (addr, nl_addr);
nl_addr_put (nl_addr);
rtnl_addr_set_prefixlen (addr, 8);
rtnl_addr_set_ifindex (addr, iface_idx);
rtnl_addr_set_scope (addr, RT_SCOPE_HOST);
rtnl_addr_set_label (addr, "lo");
err = rtnl_addr_add (nlh, addr, 0);
if (err && (err != -NLE_EXIST)) {
nm_log_warn (LOGD_CORE, "error setting loopback address: (%d) %s",
err, nl_geterror (err));
}
out:
if (addr)
rtnl_addr_put (addr);
}
/*
* nm_generic_ipv6_use_tempaddr
*
* Get net.ipv6.conf.default.use_tempaddr value from /etc/sysctl.conf or
* /lib/sysctl.d/sysctl.conf
*
*/
int nm_generic_ipv6_use_tempaddr (void)
{
char *contents = NULL;
gsize len = 0;
const char *group_name = "[forged_group]\n";
char *sysctl_data = NULL;
GKeyFile *keyfile;
GError *error = NULL;
int tmp, ret = -1;
/* Read file contents to a string. */
if (!g_file_get_contents ("/etc/sysctl.conf", &contents, &len, NULL))
if (!g_file_get_contents ("/lib/sysctl.d/sysctl.conf", &contents, &len, NULL))
return -1;
/* Prepend a group so that we can use GKeyFile parser. */
sysctl_data = g_strdup_printf ("%s%s", group_name, contents);
keyfile = g_key_file_new ();
if (keyfile == NULL)
goto done;
if (!g_key_file_load_from_data (keyfile, sysctl_data, len + strlen (group_name), G_KEY_FILE_NONE, NULL))
goto done;
tmp = g_key_file_get_integer (keyfile, "forged_group", "net.ipv6.conf.default.use_tempaddr", &error);
if (error == NULL)
ret = tmp;
done:
g_free (contents);
g_free (sysctl_data);
g_clear_error (&error);
g_key_file_free (keyfile);
return ret;
}
#ifdef TARGET_GENERIC
void nm_backend_enable_loopback (void)
{
nm_generic_enable_loopback ();
}
int nm_backend_ipv6_use_tempaddr (void)
{
return nm_generic_ipv6_use_tempaddr ();
}
#endif
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