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/*
*
* Connection Manager
*
* Copyright (C) 2007-2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <net/if.h>
#define CONNMAN_API_SUBJECT_TO_CHANGE
#include <connman/plugin.h>
#include <connman/log.h>
static int loopback_init(void)
{
struct ifreq ifr;
struct sockaddr_in *addr;
int sk, err;
sk = socket(PF_INET, SOCK_DGRAM, 0);
if (sk < 0)
return -1;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, "lo");
if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
err = -errno;
goto done;
}
if (ifr.ifr_flags & IFF_UP) {
err = -EALREADY;
connman_info("The loopback interface is already up");
goto done;
}
addr = (struct sockaddr_in *) &ifr.ifr_addr;
addr->sin_family = AF_INET;
addr->sin_addr.s_addr = inet_addr("127.0.0.1");
err = ioctl(sk, SIOCSIFADDR, &ifr);
if (err < 0) {
err = -errno;
connman_error("Setting address failed (%s)", strerror(-err));
goto done;
}
addr = (struct sockaddr_in *) &ifr.ifr_netmask;
addr->sin_family = AF_INET;
addr->sin_addr.s_addr = inet_addr("255.0.0.0");
err = ioctl(sk, SIOCSIFNETMASK, &ifr);
if (err < 0) {
err = -errno;
connman_error("Setting netmask failed (%s)", strerror(-err));
goto done;
}
if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
err = -errno;
goto done;
}
ifr.ifr_flags |= IFF_UP;
if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0) {
err = -errno;
connman_error("Activating loopback interface failed (%s)",
strerror(-err));
goto done;
}
done:
close(sk);
return err;
}
static void loopback_exit(void)
{
}
CONNMAN_PLUGIN_DEFINE(loopback, "Loopback device plugin", VERSION,
CONNMAN_PLUGIN_PRIORITY_HIGH, loopback_init, loopback_exit)
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