freebsd-dev/sbin/ifconfig/ifmac.c
Don Lewis c871174916 Use strlcpy() instead of strncpy() when copying ifname to ensure
that it is NUL terminated.  Additional NUL padding is not required
for short names.

Use sizeof(destination) in a few places instead of IFNAMSIZ.

Cast afp->af_ridreq and afp->af_addreq  to make the intent of
the code more obvious.

Reported by:	Coverity
CID:		1009628, 1009630, 1009631, 1009632, 1009633, 1009635, 1009638
CID:		1009639, 1009640, 1009641, 1009642, 1009643, 1009644, 1009645
CID:		1009646, 1009647, 1010049, 1010050, 1010051, 1010052, 1010053
CID:		1010054, 1011293, 1011294, 1011295, 1011296, 1011297, 1011298
CID:		1011299, 1305821, 1351720, 1351721
MFC after:	1 week
2016-05-16 00:25:24 +00:00

120 lines
3.2 KiB
C

/*-
* Copyright (c) 2001 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by NAI Labs, the
* Security Research Division of Network Associates, Inc. under
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
* CHATS research program.
*
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* 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 <sys/param.h>
#include <sys/ioctl.h>
#include <sys/mac.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <net/route.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ifconfig.h"
static void
maclabel_status(int s)
{
struct ifreq ifr;
mac_t label;
char *label_text;
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (mac_prepare_ifnet_label(&label) == -1)
return;
ifr.ifr_ifru.ifru_data = (void *)label;
if (ioctl(s, SIOCGIFMAC, &ifr) == -1)
goto mac_free;
if (mac_to_text(label, &label_text) == -1)
goto mac_free;
if (strlen(label_text) != 0)
printf("\tmaclabel %s\n", label_text);
free(label_text);
mac_free:
mac_free(label);
}
static void
setifmaclabel(const char *val, int d, int s, const struct afswtch *rafp)
{
struct ifreq ifr;
mac_t label;
int error;
if (mac_from_text(&label, val) == -1) {
perror(val);
return;
}
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
ifr.ifr_ifru.ifru_data = (void *)label;
error = ioctl(s, SIOCSIFMAC, &ifr);
mac_free(label);
if (error == -1)
perror("setifmac");
}
static struct cmd mac_cmds[] = {
DEF_CMD_ARG("maclabel", setifmaclabel),
};
static struct afswtch af_mac = {
.af_name = "af_maclabel",
.af_af = AF_UNSPEC,
.af_other_status = maclabel_status,
};
static __constructor void
mac_ctor(void)
{
size_t i;
for (i = 0; i < nitems(mac_cmds); i++)
cmd_register(&mac_cmds[i]);
af_register(&af_mac);
}