mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-18 08:45:20 +02:00
31ad0c45dc
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1595 3c298f89-4303-0410-b956-a3cf2f4a3e73
393 lines
11 KiB
C
393 lines
11 KiB
C
/* ether-wake.c: Send a magic packet to wake up sleeping machines. */
|
||
|
||
static char version_msg[] =
|
||
"ether-wake.c: v1.09 11/12/2003 Donald Becker, http://www.scyld.com/";
|
||
static char brief_usage_msg[] =
|
||
"usage: ether-wake [-i <ifname>] [-p aa:bb:cc:dd[:ee:ff]] 00:11:22:33:44:55\n"
|
||
" Use '-u' to see the complete set of options.\n";
|
||
static char usage_msg[] =
|
||
"usage: ether-wake [-i <ifname>] [-p aa:bb:cc:dd[:ee:ff]] 00:11:22:33:44:55\n"
|
||
"\n"
|
||
" This program generates and transmits a Wake-On-LAN (WOL)\n"
|
||
" \"Magic Packet\", used for restarting machines that have been\n"
|
||
" soft-powered-down (ACPI D3-warm state).\n"
|
||
" It currently generates the standard AMD Magic Packet format, with\n"
|
||
" an optional password appended.\n"
|
||
"\n"
|
||
" The single required parameter is the Ethernet MAC (station) address\n"
|
||
" of the machine to wake or a host ID with known NSS 'ethers' entry.\n"
|
||
" The MAC address may be found with the 'arp' program while the target\n"
|
||
" machine is awake.\n"
|
||
"\n"
|
||
" Options:\n"
|
||
" -b Send wake-up packet to the broadcast address.\n"
|
||
" -D Increase the debug level.\n"
|
||
" -i ifname Use interface IFNAME instead of the default 'eth0'.\n"
|
||
" -p <pw> Append the four or six byte password PW to the packet.\n"
|
||
" A password is only required for a few adapter types.\n"
|
||
" The password may be specified in ethernet hex format\n"
|
||
" or dotted decimal (Internet address)\n"
|
||
" -p 00:22:44:66:88:aa\n"
|
||
" -p 192.168.1.1\n";
|
||
|
||
/*
|
||
This program generates and transmits a Wake-On-LAN (WOL) "Magic Packet",
|
||
used for restarting machines that have been soft-powered-down
|
||
(ACPI D3-warm state). It currently generates the standard AMD Magic Packet
|
||
format, with an optional password appended.
|
||
|
||
This software may be used and distributed according to the terms
|
||
of the GNU Public License, incorporated herein by reference.
|
||
Contact the author for use under other terms.
|
||
|
||
This source file was originally part of the network tricks package, and
|
||
is now distributed to support the Scyld Beowulf system.
|
||
Copyright 1999-2003 Donald Becker and Scyld Computing Corporation.
|
||
|
||
The author may be reached as becker@scyld, or C/O
|
||
Scyld Computing Corporation
|
||
914 Bay Ridge Road, Suite 220
|
||
Annapolis MD 21403
|
||
|
||
Notes:
|
||
On some systems dropping root capability allows the process to be
|
||
dumped, traced or debugged.
|
||
If someone traces this program, they get control of a raw socket.
|
||
Linux handles this safely, but beware when porting this program.
|
||
|
||
An alternative to needing 'root' is using a UDP broadcast socket, however
|
||
doing so only works with adapters configured for unicast+broadcast Rx
|
||
filter. That configuration consumes more power.
|
||
*/
|
||
|
||
#include <unistd.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#include <errno.h>
|
||
#include <ctype.h>
|
||
#include <string.h>
|
||
|
||
#if 0 /* Only exists on some versions. */
|
||
#include <ioctls.h>
|
||
#endif
|
||
|
||
#include <sys/socket.h>
|
||
|
||
#include <sys/types.h>
|
||
#include <sys/ioctl.h>
|
||
#include <linux/if.h>
|
||
|
||
#include <features.h>
|
||
#if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
|
||
#include <netpacket/packet.h>
|
||
#include <net/ethernet.h>
|
||
#else
|
||
#include <asm/types.h>
|
||
#include <linux/if_packet.h>
|
||
#include <linux/if_ether.h>
|
||
#endif
|
||
#include <netdb.h>
|
||
#include <netinet/ether.h>
|
||
|
||
/* Grrr, no consistency between include versions.
|
||
Enable this if setsockopt() isn't declared with your library. */
|
||
#if 0
|
||
extern int setsockopt __P ((int __fd, int __level, int __optname,
|
||
__ptr_t __optval, int __optlen));
|
||
#else /* New, correct head files. */
|
||
#include <sys/socket.h>
|
||
#endif
|
||
|
||
u_char outpack[1000];
|
||
int outpack_sz = 0;
|
||
int debug = 0;
|
||
u_char wol_passwd[6];
|
||
int wol_passwd_sz = 0;
|
||
|
||
static int opt_no_src_addr = 0, opt_broadcast = 0;
|
||
|
||
static int get_dest_addr(const char *arg, struct ether_addr *eaddr);
|
||
static int get_fill(unsigned char *pkt, struct ether_addr *eaddr);
|
||
static int get_wol_pw(const char *optarg);
|
||
|
||
int main(int argc, char *argv[])
|
||
{
|
||
char *ifname = "eth0";
|
||
int one = 1; /* True, for socket options. */
|
||
int s; /* Raw socket */
|
||
int errflag = 0, verbose = 0, do_version = 0;
|
||
int perm_failure = 0;
|
||
int i, c, pktsize;
|
||
#if defined(PF_PACKET)
|
||
struct sockaddr_ll whereto;
|
||
#else
|
||
struct sockaddr whereto; /* who to wake up */
|
||
#endif
|
||
struct ether_addr eaddr;
|
||
|
||
while ((c = getopt(argc, argv, "bDi:p:uvV")) != -1)
|
||
switch (c) {
|
||
case 'b': opt_broadcast++; break;
|
||
case 'D': debug++; break;
|
||
case 'i': ifname = optarg; break;
|
||
case 'p': get_wol_pw(optarg); break;
|
||
case 'u': printf(usage_msg); return 0;
|
||
case 'v': verbose++; break;
|
||
case 'V': do_version++; break;
|
||
case '?':
|
||
errflag++;
|
||
}
|
||
if (verbose || do_version)
|
||
printf("%s\n", version_msg);
|
||
if (errflag) {
|
||
fprintf(stderr, brief_usage_msg);
|
||
return 3;
|
||
}
|
||
|
||
if (optind == argc) {
|
||
fprintf(stderr, "Specify the Ethernet address as 00:11:22:33:44:55.\n");
|
||
return 3;
|
||
}
|
||
|
||
/* Note: PF_INET, SOCK_DGRAM, IPPROTO_UDP would allow SIOCGIFHWADDR to
|
||
work as non-root, but we need SOCK_PACKET to specify the Ethernet
|
||
destination address. */
|
||
#if defined(PF_PACKET)
|
||
s = socket(PF_PACKET, SOCK_RAW, 0);
|
||
#else
|
||
s = socket(AF_INET, SOCK_PACKET, SOCK_PACKET);
|
||
#endif
|
||
if (s < 0) {
|
||
if (errno == EPERM)
|
||
fprintf(stderr, "ether-wake: This program must be run as root.\n");
|
||
else
|
||
perror("ether-wake: socket");
|
||
perm_failure++;
|
||
}
|
||
/* Don't revert if debugging allows a normal user to get the raw socket. */
|
||
setuid(getuid());
|
||
|
||
/* We look up the station address before reporting failure so that
|
||
errors may be reported even when run as a normal user.
|
||
*/
|
||
if (get_dest_addr(argv[optind], &eaddr) != 0)
|
||
return 3;
|
||
if (perm_failure && ! debug)
|
||
return 2;
|
||
|
||
pktsize = get_fill(outpack, &eaddr);
|
||
|
||
/* Fill in the source address, if possible.
|
||
The code to retrieve the local station address is Linux specific. */
|
||
if (! opt_no_src_addr) {
|
||
struct ifreq if_hwaddr;
|
||
unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
|
||
|
||
strcpy(if_hwaddr.ifr_name, ifname);
|
||
if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) < 0) {
|
||
fprintf(stderr, "SIOCGIFHWADDR on %s failed: %s\n", ifname,
|
||
strerror(errno));
|
||
/* Magic packets still work if our source address is bogus, but
|
||
we fail just to be anal. */
|
||
return 1;
|
||
}
|
||
memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
|
||
|
||
if (verbose) {
|
||
printf("The hardware address (SIOCGIFHWADDR) of %s is type %d "
|
||
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", ifname,
|
||
if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
|
||
hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
|
||
}
|
||
}
|
||
|
||
if (wol_passwd_sz > 0) {
|
||
memcpy(outpack+pktsize, wol_passwd, wol_passwd_sz);
|
||
pktsize += wol_passwd_sz;
|
||
}
|
||
|
||
if (verbose > 1) {
|
||
printf("The final packet is: ");
|
||
for (i = 0; i < pktsize; i++)
|
||
printf(" %2.2x", outpack[i]);
|
||
printf(".\n");
|
||
}
|
||
|
||
/* This is necessary for broadcasts to work */
|
||
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char *)&one, sizeof(one)) < 0)
|
||
perror("setsockopt: SO_BROADCAST");
|
||
|
||
#if defined(PF_PACKET)
|
||
{
|
||
struct ifreq ifr;
|
||
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
||
if (ioctl(s, SIOCGIFINDEX, &ifr) == -1) {
|
||
fprintf(stderr, "SIOCGIFINDEX on %s failed: %s\n", ifname,
|
||
strerror(errno));
|
||
return 1;
|
||
}
|
||
memset(&whereto, 0, sizeof(whereto));
|
||
whereto.sll_family = AF_PACKET;
|
||
whereto.sll_ifindex = ifr.ifr_ifindex;
|
||
/* The manual page incorrectly claims the address must be filled.
|
||
We do so because the code may change to match the docs. */
|
||
whereto.sll_halen = ETH_ALEN;
|
||
memcpy(whereto.sll_addr, outpack, ETH_ALEN);
|
||
|
||
}
|
||
#else
|
||
whereto.sa_family = 0;
|
||
strcpy(whereto.sa_data, ifname);
|
||
#endif
|
||
|
||
if ((i = sendto(s, outpack, pktsize, 0, (struct sockaddr *)&whereto,
|
||
sizeof(whereto))) < 0)
|
||
perror("sendto");
|
||
else if (debug)
|
||
printf("Sendto worked ! %d.\n", i);
|
||
|
||
#ifdef USE_SEND
|
||
if (bind(s, (struct sockaddr *)&whereto, sizeof(whereto)) < 0)
|
||
perror("bind");
|
||
else if (send(s, outpack, 100, 0) < 0)
|
||
perror("send");
|
||
#endif
|
||
#ifdef USE_SENDMSG
|
||
{
|
||
struct msghdr msghdr = { 0,};
|
||
struct iovec iovector[1];
|
||
msghdr.msg_name = &whereto;
|
||
msghdr.msg_namelen = sizeof(whereto);
|
||
msghdr.msg_iov = iovector;
|
||
msghdr.msg_iovlen = 1;
|
||
iovector[0].iov_base = outpack;
|
||
iovector[0].iov_len = pktsize;
|
||
if ((i = sendmsg(s, &msghdr, 0)) < 0)
|
||
perror("sendmsg");
|
||
else if (debug)
|
||
printf("sendmsg worked, %d (%d).\n", i, errno);
|
||
}
|
||
#endif
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Convert the host ID string to a MAC address.
|
||
The string may be a
|
||
Host name
|
||
IP address string
|
||
MAC address string
|
||
*/
|
||
|
||
static int get_dest_addr(const char *hostid, struct ether_addr *eaddr)
|
||
{
|
||
struct ether_addr *eap;
|
||
|
||
eap = ether_aton(hostid);
|
||
if (eap) {
|
||
*eaddr = *eap;
|
||
if (debug)
|
||
fprintf(stderr, "The target station address is %s.\n",
|
||
ether_ntoa(eaddr));
|
||
} else if (ether_hostton(hostid, eaddr) == 0) {
|
||
if (debug)
|
||
fprintf(stderr, "Station address for hostname %s is %s.\n",
|
||
hostid, ether_ntoa(eaddr));
|
||
} else {
|
||
(void)fprintf(stderr,
|
||
"ether-wake: The Magic Packet host address must be "
|
||
"specified as\n"
|
||
" - a station address, 00:11:22:33:44:55, or\n"
|
||
" - a hostname with a known 'ethers' entry.\n");
|
||
return -1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
static int get_fill(unsigned char *pkt, struct ether_addr *eaddr)
|
||
{
|
||
int offset, i;
|
||
unsigned char *station_addr = eaddr->ether_addr_octet;
|
||
|
||
if (opt_broadcast)
|
||
memset(pkt+0, 0xff, 6);
|
||
else
|
||
memcpy(pkt, station_addr, 6);
|
||
memcpy(pkt+6, station_addr, 6);
|
||
pkt[12] = 0x08; /* Or 0x0806 for ARP, 0x8035 for RARP */
|
||
pkt[13] = 0x42;
|
||
offset = 14;
|
||
|
||
memset(pkt+offset, 0xff, 6);
|
||
offset += 6;
|
||
|
||
for (i = 0; i < 16; i++) {
|
||
memcpy(pkt+offset, station_addr, 6);
|
||
offset += 6;
|
||
}
|
||
if (debug) {
|
||
fprintf(stderr, "Packet is ");
|
||
for (i = 0; i < offset; i++)
|
||
fprintf(stderr, " %2.2x", pkt[i]);
|
||
fprintf(stderr, ".\n");
|
||
}
|
||
return offset;
|
||
}
|
||
|
||
static int get_wol_pw(const char *optarg)
|
||
{
|
||
int passwd[6];
|
||
int byte_cnt;
|
||
int i;
|
||
|
||
byte_cnt = sscanf(optarg, "%2x:%2x:%2x:%2x:%2x:%2x",
|
||
&passwd[0], &passwd[1], &passwd[2],
|
||
&passwd[3], &passwd[4], &passwd[5]);
|
||
if (byte_cnt < 4)
|
||
byte_cnt = sscanf(optarg, "%d.%d.%d.%d",
|
||
&passwd[0], &passwd[1], &passwd[2], &passwd[3]);
|
||
if (byte_cnt < 4) {
|
||
fprintf(stderr, "Unable to read the Wake-On-LAN password.\n");
|
||
return 0;
|
||
}
|
||
printf(" The Magic packet password is %2.2x %2.2x %2.2x %2.2x (%d).\n",
|
||
passwd[0], passwd[1], passwd[2], passwd[3], byte_cnt);
|
||
for (i = 0; i < byte_cnt; i++)
|
||
wol_passwd[i] = passwd[i];
|
||
return wol_passwd_sz = byte_cnt;
|
||
}
|
||
|
||
#if 0
|
||
{
|
||
to = (struct sockaddr_in *)&whereto;
|
||
to->sin_family = AF_INET;
|
||
if (inet_aton(target, &to->sin_addr)) {
|
||
hostname = target;
|
||
}
|
||
memset (&sa, 0, sizeof sa);
|
||
sa.sa_family = AF_INET;
|
||
strncpy (sa.sa_data, interface, sizeof sa.sa_data);
|
||
sendto (sock, buf, bufix + len, 0, &sa, sizeof sa);
|
||
strncpy (sa.sa_data, interface, sizeof sa.sa_data);
|
||
#if 1
|
||
sendto (sock, buf, bufix + len, 0, &sa, sizeof sa);
|
||
#else
|
||
bind (sock, &sa, sizeof sa);
|
||
connect();
|
||
send (sock, buf, bufix + len, 0);
|
||
#endif
|
||
}
|
||
#endif
|
||
|
||
|
||
/*
|
||
* Local variables:
|
||
* compile-command: "gcc -O -Wall -o ether-wake ether-wake.c"
|
||
* c-indent-level: 4
|
||
* c-basic-offset: 4
|
||
* c-indent-level: 4
|
||
* tab-width: 4
|
||
* End:
|
||
*/
|