source: branches/stable/mindi-busybox/networking/ether-wake.c @ 1770

Last change on this file since 1770 was 1770, checked in by Bruno Cornec, 13 years ago
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

File size: 8.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * ether-wake.c - Send a magic packet to wake up sleeping machines.
4 *
5 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
6 *
7 * Author:      Donald Becker, http://www.scyld.com/"; http://www.scyld.com/wakeonlan.html
8 * Busybox port: Christian Volkmann <haveaniceday@online.de>
9 *               Used version of ether-wake.c: v1.09 11/12/2003 Donald Becker, http://www.scyld.com/";
10 */
11
12/* full usage according Donald Becker
13 * usage: ether-wake [-i <ifname>] [-p aa:bb:cc:dd[:ee:ff]] 00:11:22:33:44:55\n"
14 *
15 *  This program generates and transmits a Wake-On-LAN (WOL)\n"
16 *  \"Magic Packet\", used for restarting machines that have been\n"
17 *  soft-powered-down (ACPI D3-warm state).\n"
18 *  It currently generates the standard AMD Magic Packet format, with\n"
19 *  an optional password appended.\n"
20 *
21 *  The single required parameter is the Ethernet MAC (station) address\n"
22 *  of the machine to wake or a host ID with known NSS 'ethers' entry.\n"
23 *  The MAC address may be found with the 'arp' program while the target\n"
24 *  machine is awake.\n"
25 *
26 *  Options:\n"
27 *      -b  Send wake-up packet to the broadcast address.\n"
28 *      -D  Increase the debug level.\n"
29 *      -i ifname   Use interface IFNAME instead of the default 'eth0'.\n"
30 *      -p <pw>     Append the four or six byte password PW to the packet.\n"
31 *                  A password is only required for a few adapter types.\n"
32 *                  The password may be specified in ethernet hex format\n"
33 *                  or dotted decimal (Internet address)\n"
34 *      -p 00:22:44:66:88:aa\n"
35 *      -p 192.168.1.1\n";
36 *
37 *
38 *  This program generates and transmits a Wake-On-LAN (WOL) "Magic Packet",
39 *  used for restarting machines that have been soft-powered-down
40 *  (ACPI D3-warm state).  It currently generates the standard AMD Magic Packet
41 *  format, with an optional password appended.
42 *
43 *  This software may be used and distributed according to the terms
44 *  of the GNU Public License, incorporated herein by reference.
45 *  Contact the author for use under other terms.
46 *
47 *  This source file was originally part of the network tricks package, and
48 *  is now distributed to support the Scyld Beowulf system.
49 *  Copyright 1999-2003 Donald Becker and Scyld Computing Corporation.
50 *
51 *  The author may be reached as becker@scyld, or C/O
52 *   Scyld Computing Corporation
53 *   914 Bay Ridge Road, Suite 220
54 *   Annapolis MD 21403
55 *
56 *   Notes:
57 *   On some systems dropping root capability allows the process to be
58 *   dumped, traced or debugged.
59 *   If someone traces this program, they get control of a raw socket.
60 *   Linux handles this safely, but beware when porting this program.
61 *
62 *   An alternative to needing 'root' is using a UDP broadcast socket, however
63 *   doing so only works with adapters configured for unicast+broadcast Rx
64 *   filter.  That configuration consumes more power.
65*/
66
67
68#include <netpacket/packet.h>
69#include <net/ethernet.h>
70#include <netinet/ether.h>
71#include <linux/if.h>
72
73#include "libbb.h"
74
75/* Note: PF_INET, SOCK_DGRAM, IPPROTO_UDP would allow SIOCGIFHWADDR to
76 * work as non-root, but we need SOCK_PACKET to specify the Ethernet
77 * destination address.
78 */
79#ifdef PF_PACKET
80# define whereto_t sockaddr_ll
81# define make_socket() xsocket(PF_PACKET, SOCK_RAW, 0)
82#else
83# define whereto_t sockaddr
84# define make_socket() xsocket(AF_INET, SOCK_PACKET, SOCK_PACKET)
85#endif
86
87#ifdef DEBUG
88# define bb_debug_msg(fmt, args...) fprintf(stderr, fmt, ## args)
89void bb_debug_dump_packet(unsigned char *outpack, int pktsize)
90{
91    int i;
92    printf("packet dump:\n");
93    for (i = 0; i < pktsize; ++i) {
94        printf("%2.2x ", outpack[i]);
95        if (i % 20 == 19) puts("");
96    }
97    printf("\n\n");
98}
99#else
100# define bb_debug_msg(fmt, args...)             ((void)0)
101# define bb_debug_dump_packet(outpack, pktsize) ((void)0)
102#endif
103
104/* Convert the host ID string to a MAC address.
105 * The string may be a:
106 *    Host name
107 *    IP address string
108 *    MAC address string
109*/
110static void get_dest_addr(const char *hostid, struct ether_addr *eaddr)
111{
112    struct ether_addr *eap;
113
114    eap = ether_aton(hostid);
115    if (eap) {
116        *eaddr = *eap;
117        bb_debug_msg("The target station address is %s\n\n", ether_ntoa(eaddr));
118#if !defined(__UCLIBC__)
119    } else if (ether_hostton(hostid, eaddr) == 0) {
120        bb_debug_msg("Station address for hostname %s is %s\n\n", hostid, ether_ntoa(eaddr));
121#endif
122    } else
123        bb_show_usage();
124}
125
126static int get_fill(unsigned char *pkt, struct ether_addr *eaddr, int broadcast)
127{
128    int i;
129    unsigned char *station_addr = eaddr->ether_addr_octet;
130
131    memset(pkt, 0xff, 6);
132    if (!broadcast)
133        memcpy(pkt, station_addr, 6);
134    pkt += 6;
135
136    memcpy(pkt, station_addr, 6); /* 6 */
137    pkt += 6;
138
139    *pkt++ = 0x08; /* 12 */ /* Or 0x0806 for ARP, 0x8035 for RARP */
140    *pkt++ = 0x42; /* 13 */
141
142    memset(pkt, 0xff, 6); /* 14 */
143
144    for (i = 0; i < 16; ++i) {
145        pkt += 6;
146        memcpy(pkt, station_addr, 6); /* 20,26,32,... */
147    }
148
149    return 20 + 16*6; /* length of packet */
150}
151
152static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd)
153{
154    unsigned passwd[6];
155    int byte_cnt, i;
156
157    /* handle MAC format */
158    byte_cnt = sscanf(ethoptarg, "%2x:%2x:%2x:%2x:%2x:%2x",
159                      &passwd[0], &passwd[1], &passwd[2],
160                      &passwd[3], &passwd[4], &passwd[5]);
161    /* handle IP format */
162// FIXME: why < 4?? should it be < 6?
163    if (byte_cnt < 4)
164        byte_cnt = sscanf(ethoptarg, "%u.%u.%u.%u",
165                          &passwd[0], &passwd[1], &passwd[2], &passwd[3]);
166    if (byte_cnt < 4) {
167        bb_error_msg("cannot read Wake-On-LAN pass");
168        return 0;
169    }
170// TODO: check invalid numbers >255??
171    for (i = 0; i < byte_cnt; ++i)
172        wol_passwd[i] = passwd[i];
173
174    bb_debug_msg("password: %2.2x %2.2x %2.2x %2.2x (%d)\n\n",
175                 wol_passwd[0], wol_passwd[1], wol_passwd[2], wol_passwd[3],
176                 byte_cnt);
177
178    return byte_cnt;
179}
180
181int ether_wake_main(int argc, char **argv);
182int ether_wake_main(int argc, char **argv)
183{
184    const char *ifname = "eth0";
185    char *pass;
186    unsigned flags;
187    unsigned char wol_passwd[6];
188    int wol_passwd_sz = 0;
189    int s;                      /* Raw socket */
190    int pktsize;
191    unsigned char outpack[1000];
192
193    struct ether_addr eaddr;
194    struct whereto_t whereto;   /* who to wake up */
195
196    /* handle misc user options */
197    opt_complementary = "=1";
198    flags = getopt32(argv, "bi:p:", &ifname, &pass);
199    if (flags & 4) /* -p */
200        wol_passwd_sz = get_wol_pw(pass, wol_passwd);
201    flags &= 1; /* we further interested only in -b [bcast] flag */
202
203    /* create the raw socket */
204    s = make_socket();
205
206    /* now that we have a raw socket we can drop root */
207    /* xsetuid(getuid()); - but save on code size... */
208
209    /* look up the dest mac address */
210    get_dest_addr(argv[optind], &eaddr);
211
212    /* fill out the header of the packet */
213    pktsize = get_fill(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */);
214
215    bb_debug_dump_packet(outpack, pktsize);
216
217    /* Fill in the source address, if possible. */
218#ifdef __linux__
219    {
220        struct ifreq if_hwaddr;
221
222        strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name));
223        ioctl_or_perror_and_die(s, SIOCGIFHWADDR, &if_hwaddr, "SIOCGIFHWADDR on %s failed", ifname);
224
225        memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
226
227# ifdef DEBUG
228        {
229            unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data;
230            printf("The hardware address (SIOCGIFHWADDR) of %s is type %d  "
231                   "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n\n", ifname,
232                   if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
233                   hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
234        }
235# endif
236    }
237#endif /* __linux__ */
238
239    bb_debug_dump_packet(outpack, pktsize);
240
241    /* append the password if specified */
242    if (wol_passwd_sz > 0) {
243        memcpy(outpack+pktsize, wol_passwd, wol_passwd_sz);
244        pktsize += wol_passwd_sz;
245    }
246
247    bb_debug_dump_packet(outpack, pktsize);
248
249    /* This is necessary for broadcasts to work */
250    if (flags /* & 1 OPT_BROADCAST */) {
251        if (setsockopt_broadcast(s) != 0)
252            bb_perror_msg("SO_BROADCAST");
253    }
254
255#if defined(PF_PACKET)
256    {
257        struct ifreq ifr;
258        strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
259        xioctl(s, SIOCGIFINDEX, &ifr);
260        memset(&whereto, 0, sizeof(whereto));
261        whereto.sll_family = AF_PACKET;
262        whereto.sll_ifindex = ifr.ifr_ifindex;
263        /* The manual page incorrectly claims the address must be filled.
264           We do so because the code may change to match the docs. */
265        whereto.sll_halen = ETH_ALEN;
266        memcpy(whereto.sll_addr, outpack, ETH_ALEN);
267    }
268#else
269    whereto.sa_family = 0;
270    strcpy(whereto.sa_data, ifname);
271#endif
272    xsendto(s, outpack, pktsize, (struct sockaddr *)&whereto, sizeof(whereto));
273    if (ENABLE_FEATURE_CLEAN_UP)
274        close(s);
275    return EXIT_SUCCESS;
276}
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