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/*
* Copyright (C)2006 USAGI/WIDE Project
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* split from ip_tunnel.c
*/
/*
* Author:
* Masahide NAKAMURA @USAGI
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include "utils.h"
#include "tunnel.h"
const char *tnl_strproto(__u8 proto)
{
static char buf[16];
switch (proto) {
case IPPROTO_IPIP:
strcpy(buf, "ip");
break;
case IPPROTO_GRE:
strcpy(buf, "gre");
break;
case IPPROTO_IPV6:
strcpy(buf, "ipv6");
break;
case 0:
strcpy(buf, "any");
break;
default:
strcpy(buf, "unknown");
break;
}
return buf;
}
int tnl_get_ioctl(const char *basedev, void *p)
{
struct ifreq ifr;
int fd;
int err;
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = (void*)p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
if (err)
fprintf(stderr, "get tunnel %s failed: %s\n", basedev,
strerror(errno));
close(fd);
return err;
}
int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p)
{
struct ifreq ifr;
int fd;
int err;
if (cmd == SIOCCHGTUNNEL && name[0])
strncpy(ifr.ifr_name, name, IFNAMSIZ);
else
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
if (err)
fprintf(stderr, "add tunnel %s failed: %s\n", ifr.ifr_name,
strerror(errno));
close(fd);
return err;
}
int tnl_del_ioctl(const char *basedev, const char *name, void *p)
{
struct ifreq ifr;
int fd;
int err;
if (name[0])
strncpy(ifr.ifr_name, name, IFNAMSIZ);
else
strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCDELTUNNEL, &ifr);
if (err)
fprintf(stderr, "delete tunnel %s failed: %s\n",
ifr.ifr_name, strerror(errno));
close(fd);
return err;
}
static int tnl_gen_ioctl(int cmd, const char *name,
void *p, int skiperr)
{
struct ifreq ifr;
int fd;
int err;
strncpy(ifr.ifr_name, name, IFNAMSIZ);
ifr.ifr_ifru.ifru_data = p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
if (err && errno != skiperr)
fprintf(stderr, "%s: ioctl %x failed: %s\n", name,
cmd, strerror(errno));
close(fd);
return err;
}
int tnl_prl_ioctl(int cmd, const char *name, void *p)
{
return tnl_gen_ioctl(cmd, name, p, -1);
}
int tnl_6rd_ioctl(int cmd, const char *name, void *p)
{
return tnl_gen_ioctl(cmd, name, p, -1);
}
int tnl_ioctl_get_6rd(const char *name, void *p)
{
return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
}
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