/*
* 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 <unistd.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);
}
/* Best-effort (i.e. failures are silent) to get original
* hardware address, as read by NIC driver at attach time. Only
* applies to Ethernet NICs (IFT_ETHER). However, laggX
* interfaces claim to be IFT_ETHER, and re-type their component
* Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If
* the MAC is zeroed, then it's actually a lagg.
*/
if ((sdl->sdl_type == IFT_ETHER ||
sdl->sdl_type == IFT_IEEE8023ADLAG) &&
sdl->sdl_alen == ETHER_ADDR_LEN) {
struct ifreq ifr;
int sock_hw;
int rc;
static const u_char laggaddr[6] = {0};
strncpy(ifr.ifr_name, ifa->ifa_name,
sizeof(ifr.ifr_name));
memcpy(&ifr.ifr_addr, ifa->ifa_addr,
sizeof(ifa->ifa_addr->sa_len));
ifr.ifr_addr.sa_family = AF_LOCAL;
if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) {
warn("socket(AF_LOCAL,SOCK_DGRAM)");
return;
}
rc = ioctl(sock_hw, SIOCGHWADDR, &ifr);
close(sock_hw);
if (rc != 0) {
return;
}
/*
* If this is definitely a lagg device or the hwaddr
* matches the link addr, don't bother.
*/
if (memcmp(ifr.ifr_addr.sa_data, laggaddr,
sdl->sdl_alen) == 0 ||
memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl),
sdl->sdl_alen) == 0) {
return;
}
ether_format = ether_ntoa((const struct ether_addr *)
&ifr.ifr_addr.sa_data);
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("\thwaddr %s\n", ether_format);
}
}
}
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);
}
