171 lines
4.4 KiB
C
171 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "ifconfig.h"
|
|
|
|
static void
|
|
list_cloners(void)
|
|
{
|
|
struct if_clonereq ifcr;
|
|
char *cp, *buf;
|
|
int idx;
|
|
int s;
|
|
|
|
s = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (s == -1)
|
|
err(1, "socket(AF_INET,SOCK_DGRAM)");
|
|
|
|
memset(&ifcr, 0, sizeof(ifcr));
|
|
|
|
if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0)
|
|
err(1, "SIOCIFGCLONERS for count");
|
|
|
|
buf = malloc(ifcr.ifcr_total * IFNAMSIZ);
|
|
if (buf == NULL)
|
|
err(1, "unable to allocate cloner name buffer");
|
|
|
|
ifcr.ifcr_count = ifcr.ifcr_total;
|
|
ifcr.ifcr_buffer = buf;
|
|
|
|
if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0)
|
|
err(1, "SIOCIFGCLONERS for names");
|
|
|
|
/*
|
|
* In case some disappeared in the mean time, clamp it down.
|
|
*/
|
|
if (ifcr.ifcr_count > ifcr.ifcr_total)
|
|
ifcr.ifcr_count = ifcr.ifcr_total;
|
|
|
|
for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) {
|
|
if (idx > 0)
|
|
putchar(' ');
|
|
printf("%s", cp);
|
|
}
|
|
|
|
putchar('\n');
|
|
free(buf);
|
|
}
|
|
|
|
static clone_callback_func *clone_cb = NULL;
|
|
|
|
void
|
|
clone_setcallback(clone_callback_func *p)
|
|
{
|
|
if (clone_cb != NULL && clone_cb != p)
|
|
errx(1, "conflicting device create parameters");
|
|
clone_cb = p;
|
|
}
|
|
|
|
/*
|
|
* Do the actual clone operation. Any parameters must have been
|
|
* setup by now. If a callback has been setup to do the work
|
|
* then defer to it; otherwise do a simple create operation with
|
|
* no parameters.
|
|
*/
|
|
static void
|
|
ifclonecreate(int s, void *arg)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
(void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
if (clone_cb == NULL) {
|
|
/* NB: no parameters */
|
|
if (ioctl(s, SIOCIFCREATE2, &ifr) < 0)
|
|
err(1, "SIOCIFCREATE2");
|
|
} else {
|
|
clone_cb(s, &ifr);
|
|
}
|
|
|
|
/*
|
|
* If we get a different name back than we put in, print it.
|
|
*/
|
|
if (strncmp(name, ifr.ifr_name, sizeof(name)) != 0) {
|
|
strlcpy(name, ifr.ifr_name, sizeof(name));
|
|
printf("%s\n", name);
|
|
}
|
|
}
|
|
|
|
static
|
|
DECL_CMD_FUNC(clone_create, arg, d)
|
|
{
|
|
callback_register(ifclonecreate, NULL);
|
|
}
|
|
|
|
static
|
|
DECL_CMD_FUNC(clone_destroy, arg, d)
|
|
{
|
|
(void) strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
|
|
if (ioctl(s, SIOCIFDESTROY, &ifr) < 0)
|
|
err(1, "SIOCIFDESTROY");
|
|
}
|
|
|
|
static struct cmd clone_cmds[] = {
|
|
DEF_CMD("create", 0, clone_create),
|
|
DEF_CMD("destroy", 0, clone_destroy),
|
|
DEF_CMD("plumb", 0, clone_create),
|
|
DEF_CMD("unplumb", 0, clone_destroy),
|
|
};
|
|
|
|
static void
|
|
clone_Copt_cb(const char *optarg __unused)
|
|
{
|
|
list_cloners();
|
|
exit(0);
|
|
}
|
|
static struct option clone_Copt = { "C", "[-C]", clone_Copt_cb };
|
|
|
|
static __constructor void
|
|
clone_ctor(void)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
int i;
|
|
|
|
for (i = 0; i < N(clone_cmds); i++)
|
|
cmd_register(&clone_cmds[i]);
|
|
opt_register(&clone_Copt);
|
|
#undef N
|
|
}
|