/*
* ether-wake.c - Send a magic packet to wake up sleeping machines.
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Author: Donald Becker, http://www.scyld.com/"; http://www.scyld.com/wakeonlan.html
* Busybox port: Christian Volkmann <haveaniceday@online.de>
* 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
+ * Scyld Computing Corporation
+ * 914 Bay Ridge Road, Suite 220
+ * Annapolis MD 21403
*
* Notes:
* On some systems dropping root capability allows the process to be
* 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.
-*/
+ */
+//usage:#define ether_wake_trivial_usage
+//usage: "[-b] [-i IFACE] [-p aa:bb:cc:dd[:ee:ff]/a.b.c.d] MAC"
+//usage:#define ether_wake_full_usage "\n\n"
+//usage: "Send a magic packet to wake up sleeping machines.\n"
+//usage: "MAC must be a station address (00:11:22:33:44:55) or\n"
+//usage: "a hostname with a known 'ethers' entry.\n"
+//usage: "\n -b Broadcast the packet"
+//usage: "\n -i IFACE Interface to use (default eth0)"
+//usage: "\n -p PASSWORD Append four or six byte PASSWORD to the packet"
+#include "libbb.h"
#include <netpacket/packet.h>
-#include <net/ethernet.h>
#include <netinet/ether.h>
#include <linux/if.h>
-#include "libbb.h"
-
/* 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.
printf("packet dump:\n");
for (i = 0; i < pktsize; ++i) {
printf("%2.2x ", outpack[i]);
- if (i % 20 == 19) puts("");
+ if (i % 20 == 19) bb_putchar('\n');
}
printf("\n\n");
}
* Host name
* IP address string
* MAC address string
-*/
+ */
static void get_dest_addr(const char *hostid, struct ether_addr *eaddr)
{
struct ether_addr *eap;
- eap = ether_aton(hostid);
+ eap = ether_aton_r(hostid, eaddr);
if (eap) {
- *eaddr = *eap;
- bb_debug_msg("The target station address is %s\n\n", ether_ntoa(eaddr));
-#if !defined(__UCLIBC__)
+ bb_debug_msg("The target station address is %s\n\n", ether_ntoa(eap));
+#if !defined(__UCLIBC__) || UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 30)
} else if (ether_hostton(hostid, eaddr) == 0) {
bb_debug_msg("Station address for hostname %s is %s\n\n", hostid, ether_ntoa(eaddr));
#endif
- } else
+ } else {
bb_show_usage();
+ }
}
-static int get_fill(unsigned char *pkt, struct ether_addr *eaddr, int broadcast)
+#define PKT_HEADER_SIZE (20 + 16*6)
+static int fill_pkt_header(unsigned char *pkt, struct ether_addr *eaddr, int broadcast)
{
int i;
unsigned char *station_addr = eaddr->ether_addr_octet;
memcpy(pkt, station_addr, 6); /* 20,26,32,... */
}
- return 20 + 16*6; /* length of packet */
+ return PKT_HEADER_SIZE; /* length of packet */
}
static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd)
byte_cnt = sscanf(ethoptarg, "%u.%u.%u.%u",
&passwd[0], &passwd[1], &passwd[2], &passwd[3]);
if (byte_cnt < 4) {
- bb_error_msg("cannot read Wake-On-LAN pass");
+ bb_error_msg("can't read Wake-On-LAN pass");
return 0;
}
// TODO: check invalid numbers >255??
return byte_cnt;
}
-int ether_wake_main(int argc, char **argv);
-int ether_wake_main(int argc, char **argv)
+int ether_wake_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+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 s; /* Raw socket */
int pktsize;
- unsigned char outpack[1000];
+ unsigned char outpack[PKT_HEADER_SIZE + 6 /* max passwd size */ + 16 /* paranoia */];
struct ether_addr eaddr;
- struct whereto_t whereto; /* who to wake up */
+ struct whereto_t whereto; /* who to wake up */
/* handle misc user options */
opt_complementary = "=1";
get_dest_addr(argv[optind], &eaddr);
/* fill out the header of the packet */
- pktsize = get_fill(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */);
+ pktsize = fill_pkt_header(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */);
bb_debug_dump_packet(outpack, pktsize);
{
struct ifreq if_hwaddr;
- strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name));
+ 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);
{
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]);
+ "%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
}
#if defined(PF_PACKET)
{
struct ifreq ifr;
- strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+ strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
xioctl(s, SIOCGIFINDEX, &ifr);
memset(&whereto, 0, sizeof(whereto));
whereto.sll_family = AF_PACKET;
projects / oweals / busybox.git / blobdiff