diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile index 9484c069ad97..f57ff3a1dafc 100644 --- a/usr.sbin/Makefile +++ b/usr.sbin/Makefile @@ -190,6 +190,7 @@ SUBDIR= ${_ac} \ ${_usbconfig} \ ${_vidcontrol} \ vipw \ + wake \ watch \ watchdogd \ ${_wlandebug} \ diff --git a/usr.sbin/wake/Makefile b/usr.sbin/wake/Makefile new file mode 100644 index 000000000000..e976cdcbe79d --- /dev/null +++ b/usr.sbin/wake/Makefile @@ -0,0 +1,8 @@ +# $FreeBSD$ + +PROG= wake +MAN= wake.8 + +WARNS?= 2 + +.include diff --git a/usr.sbin/wake/wake.8 b/usr.sbin/wake/wake.8 new file mode 100644 index 000000000000..03a283b19cc4 --- /dev/null +++ b/usr.sbin/wake/wake.8 @@ -0,0 +1,61 @@ +.\" +.\" $FreeBSD$ +.\" +.\" Copyright (c) 2009 Marc Balmer +.\" +.\" Permission to use, copy, modify, and distribute this software for any +.\" purpose with or without fee is hereby granted, provided that the above +.\" copyright notice and this permission notice appear in all copies. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +.\" +.Dd June 27 2009 +.Dt WAKE 8 +.Os +.Sh NAME +.Nm wake +.Nd send Wake on LAN frames to hosts on a local Ethernet network +.Sh SYNOPSIS +.Nm +.Ar interface +.Op Ar lladdr ... +.Sh DESCRIPTION +The +.Nm +program is used to send Wake on LAN (WoL) frames over a local +Ethernet network to one or more hosts using their link layer (hardware) +addresses. +WoL functionality is generally enabled in a machine's BIOS +and can be used to power on machines from a remote system without +having physical access to them. +.Pp +.Ar interface +is the network interface of the local machine. +.Ar lladdr +are the link layer addresses of the remote machines +and can be specified as the actual hardware address +(six hexadecimal numbers separated by colons) +or a hostname entry in +.Pa /etc/ethers . +Link layer addresses can be determined and set on +.Fx +machines using +.Xr ifconfig 8 . +.Sh FILES +.Bl -tag -width "/etc/ethers" -compact +.It /etc/ethers +Ethernet host name database. +.El +.Sh SEE ALSO +.Xr ethers 5 , +.Xr ifconfig 8 +.Sh AUTHORS +.Nm +was written by +.Ar Marc Balmer Aq marc@msys.ch . diff --git a/usr.sbin/wake/wake.c b/usr.sbin/wake/wake.c new file mode 100644 index 000000000000..33198108a1ae --- /dev/null +++ b/usr.sbin/wake/wake.c @@ -0,0 +1,174 @@ +/* + * Copyright (C) 2006, 2007, 2008, 2009 Marc Balmer + * Copyright (C) 2000 Eugene M. Kim. 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. Author's name may not be used endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define _PATH_BPF "/dev/bpf" + +#ifndef SYNC_LEN +#define SYNC_LEN 6 +#endif + +#ifndef DESTADDR_COUNT +#define DESTADDR_COUNT 16 +#endif + +void usage(void); + +int wake(const char *iface, const char *host); +int bind_if_to_bpf(char const *ifname, int bpf); +int get_ether(char const *text, struct ether_addr *addr); +int send_wakeup(int bpf, struct ether_addr const *addr); + +void +usage(void) +{ + (void)fprintf(stderr, "usage: wake interface lladdr\n"); + exit(0); +} + +int +wake(const char *iface, const char *host) +{ + int res, bpf; + struct ether_addr macaddr; + + bpf = open(_PATH_BPF, O_RDWR); + if (bpf == -1) { + printf("no bpf\n"); + return -1; + } + if (bind_if_to_bpf(iface, bpf) == -1 || + get_ether(host, &macaddr) == -1) { + (void)close(bpf); + return -1; + } + res = send_wakeup(bpf, &macaddr); + (void)close(bpf); + return res; +} + +int +bind_if_to_bpf(char const *ifname, int bpf) +{ + struct ifreq ifr; + u_int dlt; + + if (strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)) >= + sizeof(ifr.ifr_name)) + return -1; + if (ioctl(bpf, BIOCSETIF, &ifr) == -1) + return -1; + if (ioctl(bpf, BIOCGDLT, &dlt) == -1) + return -1; + if (dlt != DLT_EN10MB) + return -1; + return 0; +} + +int +get_ether(char const *text, struct ether_addr *addr) +{ + struct ether_addr *paddr; + + paddr = ether_aton(text); + if (paddr != NULL) { + *addr = *paddr; + return 0; + } + if (ether_hostton(text, addr)) + return -1; + return 0; +} + +int +send_wakeup(int bpf, struct ether_addr const *addr) +{ + struct { + struct ether_header hdr; + u_char data[SYNC_LEN + ETHER_ADDR_LEN * DESTADDR_COUNT]; + } pkt; + u_char *p; + int i; + ssize_t bw; + ssize_t len; + + (void)memset(pkt.hdr.ether_dhost, 0xff, sizeof(pkt.hdr.ether_dhost)); + pkt.hdr.ether_type = htons(0); + (void)memset(pkt.data, 0xff, SYNC_LEN); + for (p = pkt.data + SYNC_LEN, i = 0; i < DESTADDR_COUNT; + p += ETHER_ADDR_LEN, i++) + bcopy(addr->octet, p, ETHER_ADDR_LEN); + p = (u_char *)&pkt; + len = sizeof(pkt); + bw = 0; + while (len) { + if ((bw = write(bpf, &pkt, sizeof(pkt))) == -1) + return -1; + len -= bw; + p += bw; + } + return 0; +} + +int +main(int argc, char *argv[]) +{ + int n; + + if (argc < 3) + usage(); + + for (n = 2; n < argc; n++) + if (wake(argv[1], argv[n])) + warnx("error sending Wake on LAN frame over %s to %s", + argv[1], argv[n]); + return 0; +}