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/*
* This file is part of the Distributed Network Block Device 3
*
* Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
*
* This file may be licensed under the terms of of the
* GNU General Public License Version 2 (the ``GPL'').
*
* Software distributed under the License is distributed
* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See the GPL for the specific language
* governing rights and limitations.
*
* You should have received a copy of the GPL along with this
* program. If not, go to http://www.gnu.org/licenses/gpl.html
* or write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include "../types.h"
#include "../version.h"
void dnbd3_print_help(char* argv_0)
{
printf("Usage: %s -h <host> -p <port> -v <vid> -r <rid> -d <device>\n", argv_0);
printf("Start the DNBD3 client.\n");
printf("-h or --host \t\t Host running dnbd3-server.\n");
printf("-p or --port \t\t Port used by server.\n");
printf("-v or --vid \t\t Volume-ID of exported image.\n");
printf("-r or --rid \t\t Release-ID of exported image.\n");
printf("-d or --device \t\t DNBD3 device name.\n");
printf("-c or --changehost \t Change dnbd3-server on device (DEBUG).\n");
printf("-H or --help \t\t Show this help text and quit.\n");
printf("-V or --version \t Show version and quit.\n");
exit(EXIT_SUCCESS);
}
void dnbd3_print_version()
{
printf("Version: %s\n", VERSION_STRING);
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
int fd;
char *host = NULL;
char *port = NULL;
int vid = 0;
int rid = 0;
char *dev = NULL;
int change_host = 0;
int opt = 0;
int longIndex = 0;
static const char *optString = "h:p:v:r:d:c:HV?";
static const struct option longOpts[] =
{
{ "host", required_argument, NULL, 'h' },
{ "port", required_argument, NULL, 'p' },
{ "vid", required_argument, NULL, 'v' },
{ "rid", required_argument, NULL, 'r' },
{ "device", required_argument, NULL, 'd' },
{ "changehost", required_argument, NULL, 'c' },
{ "help", no_argument, NULL, 'H' },
{ "version", no_argument, NULL, 'V' }, };
opt = getopt_long(argc, argv, optString, longOpts, &longIndex);
while (opt != -1)
{
switch (opt)
{
case 'h':
host = optarg;
break;
case 'p':
port = optarg;
break;
case 'v':
vid = atoi(optarg);
break;
case 'r':
rid = atoi(optarg);
break;
case 'd':
dev = optarg;
break;
case 'c':
host = optarg;
change_host = 1;
break;
case 'H':
dnbd3_print_help(argv[0]);
break;
case 'V':
dnbd3_print_version();
break;
case '?':
dnbd3_print_help(argv[0]);
}
opt = getopt_long(argc, argv, optString, longOpts, &longIndex);
}
// change host
if (change_host && host && dev && !port && (vid == 0) && (rid == 0))
{
fd = open(dev, O_RDONLY);
if (ioctl(fd, IOCTL_DISCONNECT) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_SET_HOST, host) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_CONNECT) < 0)
printf("ERROR: ioctl not successful\n");
close(fd);
exit(EXIT_SUCCESS);
}
// connect
if (host && port && dev && (vid != 0) && (rid != 0))
{
fd = open(dev, O_RDONLY);
if (ioctl(fd, IOCTL_SET_HOST, host) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_SET_PORT, port) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_SET_VID, vid) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_SET_RID, rid) < 0)
printf("ERROR: ioctl not successful\n");
if (ioctl(fd, IOCTL_CONNECT) < 0)
printf("ERROR: ioctl not successful\n");
close(fd);
exit(EXIT_SUCCESS);
}
dnbd3_print_help(argv[0]);
exit(EXIT_FAILURE);
}
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