150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ifaddrs.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/ethernet.h>
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#include "ifconfig.h"
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static struct ifreq link_ridreq;
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extern char *f_ether;
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static void
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link_status(int s __unused, const struct ifaddrs *ifa)
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{
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/* XXX no const 'cuz LLADDR is defined wrong */
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struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
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char *ether_format, *format_char;
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if (sdl != NULL && sdl->sdl_alen > 0) {
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if ((sdl->sdl_type == IFT_ETHER ||
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sdl->sdl_type == IFT_L2VLAN ||
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sdl->sdl_type == IFT_BRIDGE) &&
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sdl->sdl_alen == ETHER_ADDR_LEN) {
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ether_format = ether_ntoa((struct ether_addr *)LLADDR(sdl));
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if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
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for (format_char = strchr(ether_format, ':');
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format_char != NULL;
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format_char = strchr(ether_format, ':'))
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*format_char = '-';
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}
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printf("\tether %s\n", ether_format);
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} else {
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int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
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printf("\tlladdr %s\n", link_ntoa(sdl) + n);
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}
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}
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}
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static void
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link_getaddr(const char *addr, int which)
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{
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char *temp;
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struct sockaddr_dl sdl;
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struct sockaddr *sa = &link_ridreq.ifr_addr;
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if (which != ADDR)
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errx(1, "can't set link-level netmask or broadcast");
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if (!strcmp(addr, "random")) {
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sdl.sdl_len = sizeof(sdl);
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sdl.sdl_alen = ETHER_ADDR_LEN;
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sdl.sdl_nlen = 0;
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sdl.sdl_family = AF_LINK;
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arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN);
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/* Non-multicast and claim it is locally administered. */
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sdl.sdl_data[0] &= 0xfc;
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sdl.sdl_data[0] |= 0x02;
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} else {
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if ((temp = malloc(strlen(addr) + 2)) == NULL)
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errx(1, "malloc failed");
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temp[0] = ':';
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strcpy(temp + 1, addr);
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sdl.sdl_len = sizeof(sdl);
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link_addr(temp, &sdl);
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free(temp);
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}
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if (sdl.sdl_alen > sizeof(sa->sa_data))
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errx(1, "malformed link-level address");
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sa->sa_family = AF_LINK;
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sa->sa_len = sdl.sdl_alen;
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bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
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}
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static struct afswtch af_link = {
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.af_name = "link",
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.af_af = AF_LINK,
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.af_status = link_status,
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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};
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static struct afswtch af_ether = {
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.af_name = "ether",
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.af_af = AF_LINK,
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.af_status = link_status,
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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};
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static struct afswtch af_lladdr = {
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.af_name = "lladdr",
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.af_af = AF_LINK,
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.af_status = link_status,
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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};
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static __constructor void
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link_ctor(void)
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{
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af_register(&af_link);
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af_register(&af_ether);
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af_register(&af_lladdr);
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}
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