2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char rcsid[] =
37 #include <sys/types.h>
38 #include <sys/ioctl.h>
39 #include <sys/socket.h>
49 #include <net/if_dl.h>
50 #include <net/if_types.h>
51 #include <net/ethernet.h>
55 static struct ifreq link_ridreq;
60 link_status(int s __unused, const struct ifaddrs *ifa)
62 /* XXX no const 'cuz LLADDR is defined wrong */
63 struct sockaddr_dl *sdl;
64 char *ether_format, *format_char;
67 static const u_char laggaddr[6] = {0};
69 sdl = (struct sockaddr_dl *) ifa->ifa_addr;
70 if (sdl == NULL || sdl->sdl_alen == 0)
73 if ((sdl->sdl_type == IFT_ETHER || sdl->sdl_type == IFT_L2VLAN ||
74 sdl->sdl_type == IFT_BRIDGE) && sdl->sdl_alen == ETHER_ADDR_LEN) {
75 ether_format = ether_ntoa((struct ether_addr *)LLADDR(sdl));
76 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
77 for (format_char = strchr(ether_format, ':');
79 format_char = strchr(ether_format, ':'))
82 printf("\tether %s\n", ether_format);
84 n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
85 printf("\tlladdr %s\n", link_ntoa(sdl) + n);
89 * Best-effort (i.e. failures are silent) to get original
90 * hardware address, as read by NIC driver at attach time. Only
91 * applies to Ethernet NICs (IFT_ETHER). However, laggX
92 * interfaces claim to be IFT_ETHER, and re-type their component
93 * Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If
94 * the MAC is zeroed, then it's actually a lagg.
96 if ((sdl->sdl_type != IFT_ETHER &&
97 sdl->sdl_type != IFT_IEEE8023ADLAG) ||
98 sdl->sdl_alen != ETHER_ADDR_LEN)
101 strncpy(ifr.ifr_name, ifa->ifa_name, sizeof(ifr.ifr_name));
102 memcpy(&ifr.ifr_addr, ifa->ifa_addr, sizeof(ifa->ifa_addr->sa_len));
103 ifr.ifr_addr.sa_family = AF_LOCAL;
104 if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) {
105 warn("socket(AF_LOCAL,SOCK_DGRAM)");
108 rc = ioctl(sock_hw, SIOCGHWADDR, &ifr);
114 * If this is definitely a lagg device or the hwaddr
115 * matches the link addr, don't bother.
117 if (memcmp(ifr.ifr_addr.sa_data, laggaddr, sdl->sdl_alen) == 0 ||
118 memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl), sdl->sdl_alen) == 0)
121 ether_format = ether_ntoa((const struct ether_addr *)
122 &ifr.ifr_addr.sa_data);
123 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
124 for (format_char = strchr(ether_format, ':');
126 format_char = strchr(ether_format, ':'))
129 printf("\thwaddr %s\n", ether_format);
132 if (ioctl(s, SIOCGLANPCP, (caddr_t)&ifr) == 0 &&
133 ifr.ifr_lan_pcp != IFNET_PCP_NONE)
134 printf("\tpcp %d\n", ifr.ifr_lan_pcp);
138 link_getaddr(const char *addr, int which)
141 struct sockaddr_dl sdl;
142 struct sockaddr *sa = &link_ridreq.ifr_addr;
145 errx(1, "can't set link-level netmask or broadcast");
146 if (!strcmp(addr, "random")) {
147 sdl.sdl_len = sizeof(sdl);
148 sdl.sdl_alen = ETHER_ADDR_LEN;
150 sdl.sdl_family = AF_LINK;
151 arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN);
152 /* Non-multicast and claim it is locally administered. */
153 sdl.sdl_data[0] &= 0xfc;
154 sdl.sdl_data[0] |= 0x02;
156 if ((temp = malloc(strlen(addr) + 2)) == NULL)
157 errx(1, "malloc failed");
159 strcpy(temp + 1, addr);
160 sdl.sdl_len = sizeof(sdl);
161 link_addr(temp, &sdl);
164 if (sdl.sdl_alen > sizeof(sa->sa_data))
165 errx(1, "malformed link-level address");
166 sa->sa_family = AF_LINK;
167 sa->sa_len = sdl.sdl_alen;
168 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
171 static struct afswtch af_link = {
174 .af_status = link_status,
175 .af_getaddr = link_getaddr,
176 .af_aifaddr = SIOCSIFLLADDR,
177 .af_addreq = &link_ridreq,
179 static struct afswtch af_ether = {
182 .af_status = link_status,
183 .af_getaddr = link_getaddr,
184 .af_aifaddr = SIOCSIFLLADDR,
185 .af_addreq = &link_ridreq,
187 static struct afswtch af_lladdr = {
190 .af_status = link_status,
191 .af_getaddr = link_getaddr,
192 .af_aifaddr = SIOCSIFLLADDR,
193 .af_addreq = &link_ridreq,
196 static __constructor void
199 af_register(&af_link);
200 af_register(&af_ether);
201 af_register(&af_lladdr);