freebsd-dev/sbin/ifconfig/ifgroup.c
Ryan Moeller 8b22242550 sbin/ifconfig: Use a global libifconfig handle
This should eventually replace the socket passed to the various
handlers. In the meantime, making it global avoids repeatedly opening
and closing handles.

Reported by:	kp
Reviewed by:	kp (earlier version)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D28990
2021-03-02 21:15:40 -05:00

171 lines
4.6 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Max Laier. 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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libifconfig.h>
#include "ifconfig.h"
/* ARGSUSED */
static void
setifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
{
struct ifgroupreq ifgr;
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
errx(1, "setifgroup: group names may not end in a digit");
if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
errx(1, "setifgroup: group name too long");
if (ioctl(s, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST)
err(1," SIOCAIFGROUP");
}
/* ARGSUSED */
static void
unsetifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
{
struct ifgroupreq ifgr;
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
errx(1, "unsetifgroup: group names may not end in a digit");
if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
errx(1, "unsetifgroup: group name too long");
if (ioctl(s, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT)
err(1, "SIOCDIFGROUP");
}
static void
getifgroups(int s)
{
struct ifgroupreq ifgr;
size_t cnt;
if (ifconfig_get_groups(lifh, name, &ifgr) == -1)
return;
cnt = 0;
for (size_t i = 0; i < ifgr.ifgr_len / sizeof(struct ifg_req); ++i) {
struct ifg_req *ifg = &ifgr.ifgr_groups[i];
if (strcmp(ifg->ifgrq_group, "all")) {
if (cnt == 0)
printf("\tgroups:");
cnt++;
printf(" %s", ifg->ifgrq_group);
}
}
if (cnt)
printf("\n");
free(ifgr.ifgr_groups);
}
static void
printgroup(const char *groupname)
{
struct ifgroupreq ifgr;
struct ifg_req *ifg;
int len, cnt = 0;
int s;
s = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (s == -1)
err(1, "socket(AF_LOCAL,SOCK_DGRAM)");
bzero(&ifgr, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name));
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY ||
errno == ENOENT)
exit(exit_code);
else
err(1, "SIOCGIFGMEMB");
}
len = ifgr.ifgr_len;
if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
err(1, "printgroup");
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
err(1, "SIOCGIFGMEMB");
for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
ifg++) {
len -= sizeof(struct ifg_req);
printf("%s\n", ifg->ifgrq_member);
cnt++;
}
free(ifgr.ifgr_groups);
exit(exit_code);
}
static struct cmd group_cmds[] = {
DEF_CMD_ARG("group", setifgroup),
DEF_CMD_ARG("-group", unsetifgroup),
};
static struct afswtch af_group = {
.af_name = "af_group",
.af_af = AF_UNSPEC,
.af_other_status = getifgroups,
};
static struct option group_gopt = { "g:", "[-g groupname]", printgroup };
static __constructor void
group_ctor(void)
{
int i;
for (i = 0; i < nitems(group_cmds); i++)
cmd_register(&group_cmds[i]);
af_register(&af_group);
opt_register(&group_gopt);
}