int ether_wake_main(int argc UNUSED_PARAM, char **argv)
{
const char *ifname = "eth0";
char *pass;
unsigned flags;
unsigned char wol_passwd[6];
int wol_passwd_sz = 0;
int s; /* Raw socket */
int pktsize;
unsigned char outpack[1000];
struct ether_addr eaddr;
struct whereto_t whereto; /* who to wake up */
/* handle misc user options */
opt_complementary = "=1";
flags = getopt32(argv, "bi:p:", &ifname, &pass);
if (flags & 4) /* -p */
wol_passwd_sz = get_wol_pw(pass, wol_passwd);
flags &= 1; /* we further interested only in -b [bcast] flag */
/* create the raw socket */
s = make_socket();
/* now that we have a raw socket we can drop root */
/* xsetuid(getuid()); - but save on code size... */
/* look up the dest mac address */
get_dest_addr(argv[optind], &eaddr);
/* fill out the header of the packet */
pktsize = get_fill(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */);
bb_debug_dump_packet(outpack, pktsize);
/* Fill in the source address, if possible. */
#ifdef __linux__
{
struct ifreq if_hwaddr;
strncpy_IFNAMSIZ(if_hwaddr.ifr_name, ifname);
ioctl_or_perror_and_die(s, SIOCGIFHWADDR, &if_hwaddr, "SIOCGIFHWADDR on %s failed", ifname);
memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
# ifdef DEBUG
{
unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
printf("The hardware address (SIOCGIFHWADDR) of %s is type %d "
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n\n", ifname,
if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
}
# endif
}
#endif /* __linux__ */
bb_debug_dump_packet(outpack, pktsize);
/* append the password if specified */
if (wol_passwd_sz > 0) {
memcpy(outpack+pktsize, wol_passwd, wol_passwd_sz);
pktsize += wol_passwd_sz;
}
bb_debug_dump_packet(outpack, pktsize);
/* This is necessary for broadcasts to work */
if (flags /* & 1 OPT_BROADCAST */) {
if (setsockopt_broadcast(s) != 0)
bb_perror_msg("SO_BROADCAST");
}
#if defined(PF_PACKET)
{
struct ifreq ifr;
strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
xioctl(s, SIOCGIFINDEX, &ifr);
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
xsendto(s, outpack, pktsize, (struct sockaddr *)&whereto, sizeof(whereto));
if (ENABLE_FEATURE_CLEAN_UP)
close(s);
return EXIT_SUCCESS;
}
int ether_wake_main(int argc, char *argv[])
{
const char *ifname = "eth0";
char *pass = NULL;
unsigned long flags;
unsigned char wol_passwd[6];
int wol_passwd_sz = 0;
int s; /* Raw socket */
int pktsize;
unsigned char outpack[1000];
struct ether_addr eaddr;
struct whereto_t whereto; /* who to wake up */
/* handle misc user options */
flags = getopt32(argc, argv, "bi:p:", &ifname, &pass);
if (optind == argc)
bb_show_usage();
if (pass)
wol_passwd_sz = get_wol_pw(pass, wol_passwd);
/* create the raw socket */
s = make_socket();
/* now that we have a raw socket we can drop root */
xsetuid(getuid());
/* look up the dest mac address */
get_dest_addr(argv[optind], &eaddr);
/* fill out the header of the packet */
pktsize = get_fill(outpack, &eaddr, flags /*& 1 [OPT_BROADCAST]*/);
bb_debug_dump_packet(outpack, pktsize);
/* Fill in the source address, if possible. */
#ifdef __linux__
{
struct ifreq if_hwaddr;
strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name));
if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) < 0)
bb_perror_msg_and_die("SIOCGIFHWADDR on %s failed", ifname);
memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
# ifdef DEBUG
{
unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
printf("The hardware address (SIOCGIFHWADDR) of %s is type %d "
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n\n", ifname,
if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
}
# endif
}
#endif /* __linux__ */
bb_debug_dump_packet(outpack, pktsize);
/* append the password if specified */
if (wol_passwd_sz > 0) {
memcpy(outpack+pktsize, wol_passwd, wol_passwd_sz);
pktsize += wol_passwd_sz;
}
bb_debug_dump_packet(outpack, pktsize);
/* This is necessary for broadcasts to work */
if (flags /*& 1 [OPT_BROADCAST]*/) {
if (setsockopt_broadcast(s) < 0)
bb_perror_msg("SO_BROADCAST");
}
#if defined(PF_PACKET)
{
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFINDEX, &ifr) == -1)
bb_perror_msg_and_die("SIOCGIFINDEX");
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 (sendto(s, outpack, pktsize, 0, (struct sockaddr *)&whereto, sizeof(whereto)) < 0)
bb_perror_msg(bb_msg_write_error);
close(s);
return EXIT_SUCCESS;
}
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;
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;
}
