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/*
* Copyright (C) 2013-2014 Michio Honda. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/* $FreeBSD$ */
#include <errno.h>
#include <stdio.h>
#include <inttypes.h> /* PRI* macros */
#include <string.h> /* strcmp */
#include <fcntl.h> /* open */
#include <unistd.h> /* close */
#include <sys/ioctl.h> /* ioctl */
#include <sys/param.h>
#include <sys/socket.h> /* apple needs sockaddr */
#include <net/if.h> /* ifreq */
#include <net/netmap.h>
#include <net/netmap_user.h>
#include <libgen.h> /* basename */
/* debug support */
#define ND(format, ...) do {} while(0)
#define D(format, ...) \
fprintf(stderr, "%s [%d] " format "\n", \
__FUNCTION__, __LINE__, ##__VA_ARGS__)
static int
bdg_ctl(const char *name, int nr_cmd, int nr_arg)
{
struct nmreq nmr;
int error = 0;
int fd = open("/dev/netmap", O_RDWR);
if (fd == -1) {
D("Unable to open /dev/netmap");
return -1;
}
bzero(&nmr, sizeof(nmr));
nmr.nr_version = NETMAP_API;
if (name != NULL) /* might be NULL */
strncpy(nmr.nr_name, name, sizeof(nmr.nr_name));
nmr.nr_cmd = nr_cmd;
switch (nr_cmd) {
case NETMAP_BDG_ATTACH:
case NETMAP_BDG_DETACH:
if (nr_arg && nr_arg != NETMAP_BDG_HOST)
nr_arg = 0;
nmr.nr_arg1 = nr_arg;
error = ioctl(fd, NIOCREGIF, &nmr);
if (error == -1) {
ND("Unable to %s %s to the bridge", nr_cmd ==
NETMAP_BDG_DETACH?"detach":"attach", name);
perror(name);
} else
ND("Success to %s %s to the bridge", nr_cmd ==
NETMAP_BDG_DETACH?"detach":"attach", name);
break;
case NETMAP_BDG_LIST:
if (strlen(nmr.nr_name)) { /* name to bridge/port info */
error = ioctl(fd, NIOCGINFO, &nmr);
if (error) {
ND("Unable to obtain info for %s", name);
perror(name);
} else
D("%s at bridge:%d port:%d", name, nmr.nr_arg1,
nmr.nr_arg2);
break;
}
/* scan all the bridges and ports */
nmr.nr_arg1 = nmr.nr_arg2 = 0;
for (; !ioctl(fd, NIOCGINFO, &nmr); nmr.nr_arg2++) {
D("bridge:%d port:%d %s", nmr.nr_arg1, nmr.nr_arg2,
nmr.nr_name);
nmr.nr_name[0] = '\0';
}
break;
default: /* GINFO */
nmr.nr_cmd = nmr.nr_arg1 = nmr.nr_arg2 = 0;
error = ioctl(fd, NIOCGINFO, &nmr);
if (error) {
ND("Unable to get if info for %s", name);
perror(name);
} else
D("%s: %d queues.", name, nmr.nr_rx_rings);
break;
}
close(fd);
return error;
}
int
main(int argc, char *argv[])
{
int ch, nr_cmd = 0, nr_arg = 0;
const char *command = basename(argv[0]);
char *name = NULL;
if (argc > 3) {
usage:
fprintf(stderr,
"Usage:\n"
"%s arguments\n"
"\t-g interface interface name to get info\n"
"\t-d interface interface name to be detached\n"
"\t-a interface interface name to be attached\n"
"\t-h interface interface name to be attached with the host stack\n"
"\t-l list all or specified bridge's interfaces (default)\n"
"", command);
return 0;
}
while ((ch = getopt(argc, argv, "d:a:h:g:l")) != -1) {
name = optarg; /* default */
switch (ch) {
default:
fprintf(stderr, "bad option %c %s", ch, optarg);
goto usage;
case 'd':
nr_cmd = NETMAP_BDG_DETACH;
break;
case 'a':
nr_cmd = NETMAP_BDG_ATTACH;
break;
case 'h':
nr_cmd = NETMAP_BDG_ATTACH;
nr_arg = NETMAP_BDG_HOST;
break;
case 'g':
nr_cmd = 0;
break;
case 'l':
nr_cmd = NETMAP_BDG_LIST;
if (optind < argc && argv[optind][0] == '-')
name = NULL;
break;
}
if (optind != argc) {
// fprintf(stderr, "optind %d argc %d\n", optind, argc);
goto usage;
}
}
if (argc == 1)
nr_cmd = NETMAP_BDG_LIST;
return bdg_ctl(name, nr_cmd, nr_arg) ? 1 : 0;
}
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