freebsd-dev/sbin/ifconfig/af_link.c
Warner Losh fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

150 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.
* 3. 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 <ifaddrs.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include "ifconfig.h"
static struct ifreq link_ridreq;
extern char *f_ether;
static void
link_status(int s __unused, const struct ifaddrs *ifa)
{
/* XXX no const 'cuz LLADDR is defined wrong */
struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
char *ether_format, *format_char;
if (sdl != NULL && sdl->sdl_alen > 0) {
if ((sdl->sdl_type == IFT_ETHER ||
sdl->sdl_type == IFT_L2VLAN ||
sdl->sdl_type == IFT_BRIDGE) &&
sdl->sdl_alen == ETHER_ADDR_LEN) {
ether_format = ether_ntoa((struct ether_addr *)LLADDR(sdl));
if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
for (format_char = strchr(ether_format, ':');
format_char != NULL;
format_char = strchr(ether_format, ':'))
*format_char = '-';
}
printf("\tether %s\n", ether_format);
} else {
int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
printf("\tlladdr %s\n", link_ntoa(sdl) + n);
}
}
}
static void
link_getaddr(const char *addr, int which)
{
char *temp;
struct sockaddr_dl sdl;
struct sockaddr *sa = &link_ridreq.ifr_addr;
if (which != ADDR)
errx(1, "can't set link-level netmask or broadcast");
if (!strcmp(addr, "random")) {
sdl.sdl_len = sizeof(sdl);
sdl.sdl_alen = ETHER_ADDR_LEN;
sdl.sdl_nlen = 0;
sdl.sdl_family = AF_LINK;
arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN);
/* Non-multicast and claim it is locally administered. */
sdl.sdl_data[0] &= 0xfc;
sdl.sdl_data[0] |= 0x02;
} else {
if ((temp = malloc(strlen(addr) + 2)) == NULL)
errx(1, "malloc failed");
temp[0] = ':';
strcpy(temp + 1, addr);
sdl.sdl_len = sizeof(sdl);
link_addr(temp, &sdl);
free(temp);
}
if (sdl.sdl_alen > sizeof(sa->sa_data))
errx(1, "malformed link-level address");
sa->sa_family = AF_LINK;
sa->sa_len = sdl.sdl_alen;
bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
}
static struct afswtch af_link = {
.af_name = "link",
.af_af = AF_LINK,
.af_status = link_status,
.af_getaddr = link_getaddr,
.af_aifaddr = SIOCSIFLLADDR,
.af_addreq = &link_ridreq,
};
static struct afswtch af_ether = {
.af_name = "ether",
.af_af = AF_LINK,
.af_status = link_status,
.af_getaddr = link_getaddr,
.af_aifaddr = SIOCSIFLLADDR,
.af_addreq = &link_ridreq,
};
static struct afswtch af_lladdr = {
.af_name = "lladdr",
.af_af = AF_LINK,
.af_status = link_status,
.af_getaddr = link_getaddr,
.af_aifaddr = SIOCSIFLLADDR,
.af_addreq = &link_ridreq,
};
static __constructor void
link_ctor(void)
{
af_register(&af_link);
af_register(&af_ether);
af_register(&af_lladdr);
}