2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char rcsid[] =
35 #include <sys/types.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
47 #include <net/if_dl.h>
48 #include <net/if_types.h>
49 #include <net/ethernet.h>
53 static struct ifreq link_ridreq;
58 link_status(int s __unused, const struct ifaddrs *ifa)
60 /* XXX no const 'cuz LLADDR is defined wrong */
61 struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
62 char *ether_format, *format_char;
64 if (sdl != NULL && sdl->sdl_alen > 0) {
65 if ((sdl->sdl_type == IFT_ETHER ||
66 sdl->sdl_type == IFT_L2VLAN ||
67 sdl->sdl_type == IFT_BRIDGE) &&
68 sdl->sdl_alen == ETHER_ADDR_LEN) {
69 ether_format = ether_ntoa((struct ether_addr *)LLADDR(sdl));
70 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
71 for (format_char = strchr(ether_format, ':');
73 format_char = strchr(ether_format, ':'))
76 printf("\tether %s\n", ether_format);
78 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
80 printf("\tlladdr %s\n", link_ntoa(sdl) + n);
82 /* Best-effort (i.e. failures are silent) to get original
83 * hardware address, as read by NIC driver at attach time. Only
84 * applies to Ethernet NICs (IFT_ETHER). However, laggX
85 * interfaces claim to be IFT_ETHER, and re-type their component
86 * Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If
87 * the MAC is zeroed, then it's actually a lagg.
89 if ((sdl->sdl_type == IFT_ETHER ||
90 sdl->sdl_type == IFT_IEEE8023ADLAG) &&
91 sdl->sdl_alen == ETHER_ADDR_LEN) {
95 static const u_char laggaddr[6] = {0};
97 strncpy(ifr.ifr_name, ifa->ifa_name,
98 sizeof(ifr.ifr_name));
99 memcpy(&ifr.ifr_addr, ifa->ifa_addr,
100 sizeof(ifa->ifa_addr->sa_len));
101 ifr.ifr_addr.sa_family = AF_LOCAL;
102 if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) {
103 warn("socket(AF_LOCAL,SOCK_DGRAM)");
106 rc = ioctl(sock_hw, SIOCGHWADDR, &ifr);
113 * If this is definitely a lagg device or the hwaddr
114 * matches the link addr, don't bother.
116 if (memcmp(ifr.ifr_addr.sa_data, laggaddr,
117 sdl->sdl_alen) == 0 ||
118 memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl),
119 sdl->sdl_alen) == 0) {
122 ether_format = ether_ntoa((const struct ether_addr *)
123 &ifr.ifr_addr.sa_data);
124 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
125 for (format_char = strchr(ether_format, ':');
127 format_char = strchr(ether_format, ':'))
130 printf("\thwaddr %s\n", ether_format);
136 link_getaddr(const char *addr, int which)
139 struct sockaddr_dl sdl;
140 struct sockaddr *sa = &link_ridreq.ifr_addr;
143 errx(1, "can't set link-level netmask or broadcast");
144 if (!strcmp(addr, "random")) {
145 sdl.sdl_len = sizeof(sdl);
146 sdl.sdl_alen = ETHER_ADDR_LEN;
148 sdl.sdl_family = AF_LINK;
149 arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN);
150 /* Non-multicast and claim it is locally administered. */
151 sdl.sdl_data[0] &= 0xfc;
152 sdl.sdl_data[0] |= 0x02;
154 if ((temp = malloc(strlen(addr) + 2)) == NULL)
155 errx(1, "malloc failed");
157 strcpy(temp + 1, addr);
158 sdl.sdl_len = sizeof(sdl);
159 link_addr(temp, &sdl);
162 if (sdl.sdl_alen > sizeof(sa->sa_data))
163 errx(1, "malformed link-level address");
164 sa->sa_family = AF_LINK;
165 sa->sa_len = sdl.sdl_alen;
166 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
169 static struct afswtch af_link = {
172 .af_status = link_status,
173 .af_getaddr = link_getaddr,
174 .af_aifaddr = SIOCSIFLLADDR,
175 .af_addreq = &link_ridreq,
177 static struct afswtch af_ether = {
180 .af_status = link_status,
181 .af_getaddr = link_getaddr,
182 .af_aifaddr = SIOCSIFLLADDR,
183 .af_addreq = &link_ridreq,
185 static struct afswtch af_lladdr = {
188 .af_status = link_status,
189 .af_getaddr = link_getaddr,
190 .af_aifaddr = SIOCSIFLLADDR,
191 .af_addreq = &link_ridreq,
194 static __constructor void
197 af_register(&af_link);
198 af_register(&af_ether);
199 af_register(&af_lladdr);