2 * Copyright (C) 2006, 2007, 2008, 2009 Marc Balmer <marc@msys.ch>
3 * Copyright (C) 2000 Eugene M. Kim. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Author's name may not be used endorse or promote products derived
12 * from this software without specific prior written permission.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
23 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/ioctl.h>
31 #include <sys/socket.h>
35 #include <netinet/in.h>
36 #include <netinet/if_ether.h>
45 #define _PATH_BPF "/dev/bpf"
51 #ifndef DESTADDR_COUNT
52 #define DESTADDR_COUNT 16
55 static int bind_if_to_bpf(char const *ifname, int bpf);
56 static int get_ether(char const *text, struct ether_addr *addr);
57 static int send_wakeup(int bpf, struct ether_addr const *addr);
58 static void usage(void);
59 static int wake(const char *iface, const char *host);
65 (void)fprintf(stderr, "usage: wake interface lladdr...\n");
70 wake(const char *iface, const char *host)
72 struct ether_addr macaddr;
75 bpf = open(_PATH_BPF, O_RDWR);
80 if (bind_if_to_bpf(iface, bpf) == -1 ||
81 get_ether(host, &macaddr) == -1) {
85 res = send_wakeup(bpf, &macaddr);
91 bind_if_to_bpf(char const *ifname, int bpf)
96 if (strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)) >=
97 sizeof(ifr.ifr_name)) {
98 warnx("interface name too long: %s", ifname);
101 if (ioctl(bpf, BIOCSETIF, &ifr) == -1) {
102 warn("ioctl(%s)", "BIOCSETIF");
105 if (ioctl(bpf, BIOCGDLT, &dlt) == -1) {
106 warn("ioctl(%s)", "BIOCGDLT");
109 if (dlt != DLT_EN10MB) {
110 warnx("incompatible media");
117 get_ether(char const *text, struct ether_addr *addr)
119 struct ether_addr *paddr;
121 paddr = ether_aton(text);
126 if (ether_hostton(text, addr)) {
127 warnx("no match for host %s found", text);
134 send_wakeup(int bpf, struct ether_addr const *addr)
137 struct ether_header hdr;
138 u_char data[SYNC_LEN + ETHER_ADDR_LEN * DESTADDR_COUNT];
145 (void)memset(pkt.hdr.ether_dhost, 0xff, sizeof(pkt.hdr.ether_dhost));
146 pkt.hdr.ether_type = htons(0);
147 (void)memset(pkt.data, 0xff, SYNC_LEN);
148 for (p = pkt.data + SYNC_LEN, i = 0; i < DESTADDR_COUNT;
149 p += ETHER_ADDR_LEN, i++)
150 bcopy(addr->octet, p, ETHER_ADDR_LEN);
155 if ((bw = write(bpf, p, len)) == -1) {
166 main(int argc, char *argv[])
173 for (n = 2; n < argc; n++) {
174 if (wake(argv[1], argv[n])) {
176 warnx("error sending Wake on LAN frame over %s to %s",