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117 lines
3.5 KiB
Perl
117 lines
3.5 KiB
Perl
#!/usr/bin/perl -w
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#
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# If called as wake.pl -f file it reads lines of the form
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#
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# aa:bb:cc:dd:ee;ff 12.34.56.78 or
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# aa:bb:cc:dd:ee:ff foo.bar.com
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# aa:bb:cc:dd:ee:ff
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#
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# which are MAC addresses and hostnames of NICs to send a wakeup packet.
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# In the first two cases, unicast is used (and root permission may be
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# required if the ARP cache needs to be injected with a mapping).
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# In the third case, broadcast is used, and anybody can run the command.
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# Comments in the file start with #.
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#
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# Or MAC addresses can be specified on the command line
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#
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# wake.pl aa.bb.cc.dd.ee.ff
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#
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# Or both can be used:
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#
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# wake.pl -f addresses.cfg 11:22:33:44:55:66
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#
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# This program may have to be run with superuser privilege because it
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# may need to inject an ARP entry into the cache.
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# Be careful, you could corrupt valid entries if those NICs are
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# already active.
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#
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# Perl version by ken_yap@users.sourceforge.net after DOS/Windows C version posted by
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# Steve_Marfisi@3com.com on the Netboot mailing list
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# Released under GNU Public License, 2000-01-08
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# Added switch -q for quiet mode, changed Getopt usage to work with older versions,
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# added switch -u for unicast mode, now default is always broadcast mode,
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# added switch -s for seach pattern so you could filter entries from file.
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# Guenter.Knauf@dialup.soco.de, 2000-10-14
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#
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use Getopt::Std;
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use Socket;
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getopts('quf:s:');
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if (defined($opt_f)) {
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unless (open(F, $opt_f)) {
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print STDERR "open: $opt_f: $!\n";
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} else {
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while (<F>) {
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next if /^\s*#/; # skip comments
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($mac, $ip) = split;
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next if !defined($mac) or $mac eq '';
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next if defined($opt_s) and (!/$opt_s/);
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if (!defined($ip) or $ip eq '' or !$opt_u) {
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&send_broadcast_packet($mac);
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} else {
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&send_unicast_packet($mac, $ip);
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}
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}
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close(F);
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}
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}
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while (@ARGV) {
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send_broadcast_packet(shift(@ARGV));
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}
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sub send_broadcast_packet {
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($mac) = @_;
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if ($mac !~ /^[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}$/i) {
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print STDERR "Malformed MAC address $mac\n";
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return;
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}
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# Remove colons
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$mac =~ tr/://d;
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# Magic packet is 6 bytes of FF followed by the MAC address 16 times
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$magic = ("\xff" x 6) . (pack('H12', $mac) x 16);
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# Create socket
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socket(S, PF_INET, SOCK_DGRAM, getprotobyname('udp'))
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or die "socket: $!\n";
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# Enable broadcast
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setsockopt(S, SOL_SOCKET, SO_BROADCAST, 1)
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or die "setsockopt: $!\n";
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# Send the wakeup packet
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if (!$opt_q) {
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print "Sending wakeup packet to MAC address $mac";
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print " ($ip)" if (defined($ip));
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print "\n";
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}
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defined(send(S, $magic, 0, sockaddr_in(0x2fff, INADDR_BROADCAST)))
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or print STDERR "send: $!\n";
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close(S);
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}
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sub send_unicast_packet {
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($mac, $ip) = @_;
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if (!defined($iaddr = inet_aton($ip))) {
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print STDERR "Cannot resolve $ip\n";
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return;
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}
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if ($mac !~ /^[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}:[\da-f]{2}$/i) {
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print STDERR "Malformed MAC address $mac\n";
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return;
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}
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# Inject entry into ARP table, in case it's not there already
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system("arp -s $ip $mac") == 0
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or print STDERR "Warning: arp command failed, you need to be root\n";
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# Remove colons
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$mac =~ tr/://d;
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# Magic packet is 6 bytes of FF followed by the MAC address 16 times
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$magic = ("\xff" x 6) . (pack('H12', $mac) x 16);
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# Create socket
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socket(S, PF_INET, SOCK_DGRAM, getprotobyname('udp'))
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or die "socket: $!\n";
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# Send the wakeup packet
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print "Sending wakeup packet to $ip at MAC address $mac\n" if (!$opt_q);
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defined(send(S, $magic, 0, sockaddr_in(0x2fff, $iaddr)))
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or print STDERR "send: $!\n";
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close(S);
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}
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