1 #!/usr/bin/perl
2 #===============================================================================
3 #
4 # FILE: gosa-server
5 #
6 # USAGE: gosa-si-client
7 #
8 # DESCRIPTION:
9 #
10 # OPTIONS: ---
11 # REQUIREMENTS: libnetaddr-ip-perl
12 # BUGS: ---
13 # NOTES:
14 # AUTHOR: (Andreas Rettenberger), <rettenberger@gonicus.de>
15 # COMPANY:
16 # VERSION: 1.0
17 # CREATED: 12.09.2007 08:54:41 CEST
18 # REVISION: ---
19 #===============================================================================
21 use strict;
22 use warnings;
23 use Getopt::Long;
24 use Config::IniFiles;
25 use POSIX;
26 use Time::HiRes qw( gettimeofday );
28 use Fcntl;
29 use IO::Socket::INET;
30 use Crypt::Rijndael;
31 use MIME::Base64;
32 use Digest::MD5 qw(md5 md5_hex md5_base64);
33 use XML::Simple;
34 use Data::Dumper;
35 use Sys::Syslog qw( :DEFAULT setlogsock);
36 use File::Spec;
37 use Cwd;
38 use NetAddr::IP;
39 use GOSA::GosaSupportDaemon;
42 my ($cfg_file, %cfg_defaults, $foreground, $verbose, $pid_file, $procid, $pid, $log_file);
43 my ($server_address, $server_ip, $server_port, $server_domain, $server_passwd, $server_cipher, $server_timeout);
44 my ($client_address, $client_ip, $client_port, $client_mac_address, $network_interface, $ldap_config, $pam_config, $nss_config);
45 my ($input_socket, $rbits, $wbits, $ebits, $xml, $known_hosts, $ldap_enabled);
46 my (@events);
48 # default variables
49 my $event_dir = "/usr/lib/gosa-si/client/events";
50 $known_hosts = {};
51 $foreground = 0 ;
52 %cfg_defaults =
53 ("general" =>
54 {"log_file" => [\$log_file, "/var/run/".$0.".log"],
55 "pid_file" => [\$pid_file, "/var/run/".$0.".pid"],
56 },
57 "client" =>
58 {"client_port" => [\$client_port, "20083"],
59 "client_ip" => [\$client_ip, "0.0.0.0"],
60 "ldap" => [\$ldap_enabled, 1],
61 "ldap_config" => [\$ldap_config, "/etc/ldap/ldap.conf"],
62 "pam_config" => [\$pam_config, "/etc/pam_ldap.conf"],
63 "nss_config" => [\$nss_config, "/etc/libnss_ldap.conf"],
64 },
65 "server" =>
66 {"server_ip" => [\$server_ip, ""],
67 "server_port" => [\$server_port, "20081"],
68 "server_passwd" => [\$server_passwd, ""],
69 "server_timeout" => [\$server_timeout, 10],
70 "server_domain" => [\$server_domain, ""],
71 },
72 );
75 #=== FUNCTION ================================================================
76 # NAME: read_configfile
77 # PARAMETERS: cfg_file - string -
78 # RETURNS:
79 # DESCRIPTION:
80 #===============================================================================
81 sub read_configfile {
82 my $cfg;
83 if( defined( $cfg_file) && ( length($cfg_file) > 0 )) {
84 if( -r $cfg_file ) {
85 $cfg = Config::IniFiles->new( -file => $cfg_file );
86 } else {
87 print STDERR "Couldn't read config file!";
88 }
89 } else {
90 $cfg = Config::IniFiles->new() ;
91 }
92 foreach my $section (keys %cfg_defaults) {
93 foreach my $param (keys %{$cfg_defaults{ $section }}) {
94 my $pinfo = $cfg_defaults{ $section }{ $param };
95 ${@$pinfo[ 0 ]} = $cfg->val( $section, $param, @$pinfo[ 1 ] );
96 }
97 }
98 }
101 #=== FUNCTION ================================================================
102 # NAME: logging
103 # PARAMETERS: level - string - default 'info'
104 # msg - string -
105 # facility - string - default 'LOG_DAEMON'
106 # RETURNS:
107 # DESCRIPTION:
108 #===============================================================================
109 sub daemon_log {
110 my( $msg, $level ) = @_;
111 if(not defined $msg) { return }
112 if(not defined $level) { $level = 1 }
113 if(defined $log_file){
114 open(LOG_HANDLE, ">>$log_file");
115 if(not defined open( LOG_HANDLE, ">>$log_file" )) {
116 print STDERR "cannot open $log_file: $!";
117 return }
118 chomp($msg);
119 if($level <= $verbose){
120 print LOG_HANDLE $msg."\n";
121 if(defined $foreground) { print $msg."\n" }
122 }
123 }
124 close( LOG_HANDLE );
125 # my ($msg, $level, $facility) = @_;
126 # if(not defined $msg) {return}
127 # if(not defined $level) {$level = "info"}
128 # if(not defined $facility) {$facility = "LOG_DAEMON"}
129 # openlog($0, "pid,cons,", $facility);
130 # syslog($level, $msg);
131 # closelog;
132 # return;
133 }
136 #=== FUNCTION ================================================================
137 # NAME: check_cmdline_param
138 # PARAMETERS:
139 # RETURNS:
140 # DESCRIPTION:
141 #===============================================================================
142 sub check_cmdline_param () {
143 my $err_config;
144 my $err_counter = 0;
145 if( not defined( $cfg_file)) {
146 #$err_config = "please specify a config file";
147 #$err_counter += 1;
148 my $cwd = getcwd;
149 my $name = "/etc/gosa-si/client.conf";
150 $cfg_file = File::Spec->catfile( $cwd, $name );
151 print STDERR "no conf file specified\n try to use default: $cfg_file\n";
152 }
153 if( $err_counter > 0 ) {
154 &usage( "", 1 );
155 if( defined( $err_config)) { print STDERR "$err_config\n"}
156 print STDERR "\n";
157 exit( -1 );
158 }
159 }
162 #=== FUNCTION ================================================================
163 # NAME: check_pid
164 # PARAMETERS:
165 # RETURNS:
166 # DESCRIPTION:
167 #===============================================================================
168 sub check_pid {
169 $pid = -1;
170 # Check, if we are already running
171 if( open(LOCK_FILE, "<$pid_file") ) {
172 $pid = <LOCK_FILE>;
173 if( defined $pid ) {
174 chomp( $pid );
175 if( -f "/proc/$pid/stat" ) {
176 my($stat) = `cat /proc/$pid/stat` =~ m/$pid \((.+)\).*/;
177 if( $0 eq $stat ) {
178 close( LOCK_FILE );
179 exit -1;
180 }
181 }
182 }
183 close( LOCK_FILE );
184 unlink( $pid_file );
185 }
187 # create a syslog msg if it is not to possible to open PID file
188 if (not sysopen(LOCK_FILE, $pid_file, O_WRONLY|O_CREAT|O_EXCL, 0644)) {
189 my($msg) = "Couldn't obtain lockfile '$pid_file' ";
190 if (open(LOCK_FILE, '<', $pid_file)
191 && ($pid = <LOCK_FILE>))
192 {
193 chomp($pid);
194 $msg .= "(PID $pid)\n";
195 } else {
196 $msg .= "(unable to read PID)\n";
197 }
198 if( ! ($foreground) ) {
199 openlog( $0, "cons,pid", "daemon" );
200 syslog( "warning", $msg );
201 closelog();
202 }
203 else {
204 print( STDERR " $msg " );
205 }
206 exit( -1 );
207 }
208 }
210 #=== FUNCTION ================================================================
211 # NAME: get_interface_for_ip
212 # PARAMETERS: ip address (i.e. 192.168.0.1)
213 # RETURNS: array: list of interfaces if ip=0.0.0.0, matching interface if found, undef else
214 # DESCRIPTION: Uses proc fs (/proc/net/dev) to get list of interfaces.
215 #===============================================================================
216 sub get_interface_for_ip {
217 my $result;
218 my $ip= shift;
219 if ($ip && length($ip) > 0) {
220 my @ifs= &get_interfaces();
221 if($ip eq "0.0.0.0") {
222 $result = "all";
223 } else {
224 foreach (@ifs) {
225 my $if=$_;
226 if(get_ip($if) eq $ip) {
227 $result = $if;
228 last;
229 }
230 }
231 }
232 }
233 return $result;
234 }
236 #=== FUNCTION ================================================================
237 # NAME: get_interfaces
238 # PARAMETERS: none
239 # RETURNS: (list of interfaces)
240 # DESCRIPTION: Uses proc fs (/proc/net/dev) to get list of interfaces.
241 #===============================================================================
242 sub get_interfaces {
243 my @result;
244 my $PROC_NET_DEV= ('/proc/net/dev');
246 open(PROC_NET_DEV, "<$PROC_NET_DEV")
247 or die "Could not open $PROC_NET_DEV";
249 my @ifs = <PROC_NET_DEV>;
251 close(PROC_NET_DEV);
253 # Eat first two line
254 shift @ifs;
255 shift @ifs;
257 chomp @ifs;
258 foreach my $line(@ifs) {
259 my $if= (split /:/, $line)[0];
260 $if =~ s/^\s+//;
261 push @result, $if;
262 }
264 return @result;
265 }
267 #=== FUNCTION ================================================================
268 # NAME: get_mac
269 # PARAMETERS: interface name (i.e. eth0)
270 # RETURNS: (mac address)
271 # DESCRIPTION: Uses ioctl to get mac address directly from system.
272 #===============================================================================
273 sub get_mac {
274 my $ifreq= shift;
275 my $result;
276 if ($ifreq && length($ifreq) > 0) {
277 if($ifreq eq "all") {
278 if(defined($server_ip)) {
279 $result = &get_local_mac_for_remote_ip($server_ip);
280 } else {
281 $result = "00:00:00:00:00:00";
282 }
283 } else {
284 my $SIOCGIFHWADDR= 0x8927; # man 2 ioctl_list
286 # A configured MAC Address should always override a guessed value
287 if ($client_mac_address and length($client_mac_address) > 0) {
288 $result= $client_mac_address;
289 }
291 socket SOCKET, PF_INET, SOCK_DGRAM, getprotobyname('ip')
292 or die "socket: $!";
294 if(ioctl SOCKET, $SIOCGIFHWADDR, $ifreq) {
295 my ($if, $mac)= unpack 'h36 H12', $ifreq;
297 if (length($mac) > 0) {
298 $mac=~ m/^([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])$/;
299 $mac= sprintf("%s:%s:%s:%s:%s:%s", $1, $2, $3, $4, $5, $6);
300 $result = $mac;
301 }
302 }
303 }
304 }
305 return $result;
306 }
308 #=== FUNCTION ================================================================
309 # NAME: get_ip
310 # PARAMETERS: interface name (i.e. eth0)
311 # RETURNS: (ip address)
312 # DESCRIPTION: Uses ioctl to get ip address directly from system.
313 #===============================================================================
314 sub get_ip {
315 my $ifreq= shift;
316 my $result= "";
317 my $SIOCGIFADDR= 0x8915; # man 2 ioctl_list
318 my $proto= getprotobyname('ip');
320 socket SOCKET, PF_INET, SOCK_DGRAM, $proto
321 or die "socket: $!";
323 if(ioctl SOCKET, $SIOCGIFADDR, $ifreq) {
324 my ($if, $sin) = unpack 'a16 a16', $ifreq;
325 my ($port, $addr) = sockaddr_in $sin;
326 my $ip = inet_ntoa $addr;
328 if ($ip && length($ip) > 0) {
329 $result = $ip;
330 }
331 }
333 return $result;
334 }
336 #=== FUNCTION ================================================================
337 # NAME: get_local_mac_for_remote_ip
338 # PARAMETERS: none (takes server_ip from global variable)
339 # RETURNS: (ip address from interface that is used for communication)
340 # DESCRIPTION: Uses ioctl to get routing table from system, checks which entry
341 # matches (defaultroute last).
342 #===============================================================================
343 sub get_local_mac_for_remote_ip {
344 my $ifreq= shift;
345 my $result= "00:00:00:00:00:00";
346 my $PROC_NET_ROUTE= ('/proc/net/route');
348 open(PROC_NET_ROUTE, "<$PROC_NET_ROUTE")
349 or die "Could not open $PROC_NET_ROUTE";
351 my @ifs = <PROC_NET_ROUTE>;
353 close(PROC_NET_ROUTE);
355 # Eat header line
356 shift @ifs;
357 chomp @ifs;
358 foreach my $line(@ifs) {
359 my ($Iface,$Destination,$Gateway,$Flags,$RefCnt,$Use,$Metric,$Mask,$MTU,$Window,$IRTT)=split(/\s/, $line);
360 my $destination;
361 my $mask;
362 my ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Destination);
363 $destination= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
364 ($d,$c,$b,$a)=unpack('a2 a2 a2 a2', $Mask);
365 $mask= sprintf("%d.%d.%d.%d", hex($a), hex($b), hex($c), hex($d));
366 if(new NetAddr::IP($server_ip)->within(new NetAddr::IP($destination, $mask))) {
367 # destination matches route, save mac and exit
368 $result= &get_mac($Iface);
369 last;
370 }
371 }
374 return $result;
375 }
377 #=== FUNCTION ================================================================
378 # NAME: usage
379 # PARAMETERS:
380 # RETURNS:
381 # DESCRIPTION:
382 #===============================================================================
383 sub usage {
384 my( $text, $help ) = @_;
385 $text = undef if( "h" eq $text );
386 (defined $text) && print STDERR "\n$text\n";
387 if( (defined $help && $help) || (!defined $help && !defined $text) ) {
388 print STDERR << "EOF" ;
389 usage: $0 [-hvf] [-c config]
391 -h : this (help) message
392 -c <file> : config file
393 -f : foreground, process will not be forked to background
394 -v : be verbose (multiple to increase verbosity)
395 EOF
396 }
397 print "\n" ;
398 }
400 #=== FUNCTION ================================================================
401 # NAME: get_server_addresses
402 # PARAMETERS:
403 # RETURNS:
404 # DESCRIPTION:
405 #===============================================================================
406 sub get_server_addresses {
407 my $domain= shift;
408 my @result;
409 my $dig_cmd= 'dig +nocomments srv _gosad._tcp.'.$domain;
411 my $output= `$dig_cmd 2>&1`;
412 open (PIPE, "$dig_cmd 2>&1 |");
413 while(<PIPE>) {
414 chomp $_;
415 # If it's not a comment
416 if($_ =~ m/^[^;]/) {
417 my @matches= split /\s+/;
419 # Push hostname with port
420 if($matches[3] eq 'SRV') {
421 push @result, $matches[7].':'.$matches[6];
422 } elsif ($matches[3] eq 'A') {
423 my $i=0;
425 # Substitute the hostname with the ip address of the matching A record
426 foreach my $host (@result) {
427 if ((split /\:/, $host)[0] eq $matches[0]) {
428 $result[$i]= $matches[4].':'.(split /\:/, $host)[1];
429 }
430 $i++;
431 }
432 }
433 }
434 }
435 close(PIPE);
436 return @result;
437 }
440 #=== FUNCTION ================================================================
441 # NAME: register_at_server
442 # PARAMETERS:
443 # RETURNS:
444 # DESCRIPTION:
445 #===============================================================================
446 sub register_at_server {
447 my ($tmp) = @_;
449 # create new passwd and ciphering object for client-server communication
450 my $new_server_passwd = &create_passwd();
451 my $new_server_cipher;
453 # detect all client accepted events
454 opendir(DIR, $event_dir)
455 or daemon_log("cannot find directory $event_dir!\ngosa-si-client starts without any accepting events!", 1);
456 my $file_name;
457 my @events_list = ();
458 while(defined($file_name = readdir(DIR))){
459 if ($file_name eq "." || $file_name eq "..") {
460 next;
461 }
462 push(@events_list, $file_name);
463 }
464 my $events = join(",", @events_list);
465 daemon_log("found events: $events", 1);
467 # fill in all possible servers
468 my @servers;
469 if (defined $server_domain) {
470 my @tmp_servers = &get_server_addresses($server_domain);
471 foreach my $server (@tmp_servers) { unshift(@servers, $server); }
472 }
473 # add server address from config file at first position of server list
474 if (defined $server_address) {
475 unshift(@servers, $server_address);
476 }
477 daemon_log("found servers in configuration file and via DNS:", 5);
478 foreach my $server (@servers) {
479 daemon_log("\t$server", 5);
480 }
482 my ($rout, $wout, $reg_server);
483 foreach my $server (@servers) {
485 # create msg hash
486 my $register_hash = &create_xml_hash("here_i_am", $client_address, $server);
487 &add_content2xml_hash($register_hash, "new_passwd", $new_server_passwd);
488 &add_content2xml_hash($register_hash, "mac_address", $client_mac_address);
489 &add_content2xml_hash($register_hash, "events", $events);
491 my $tmp = print Dumper $register_hash;
493 # send xml hash to server with general server passwd
494 my $answer = &send_msg_hash2address($register_hash, $server, $server_passwd);
496 if ($answer != 0) { next; }
498 # waiting for response
499 daemon_log("waiting for response...\n", 5);
500 my $nf = select($rout=$rbits, $wout=$wbits, undef, $server_timeout);
502 # something is coming in
503 if(vec $rout, fileno $input_socket, 1) {
504 my $crypted_msg;
505 my $client = $input_socket->accept();
506 my $other_end = getpeername($client);
507 if(not defined $other_end) {
508 daemon_log("client cannot be identified: $!\n");
509 } else {
510 my ($port, $iaddr) = unpack_sockaddr_in($other_end);
511 my $actual_ip = inet_ntoa($iaddr);
512 daemon_log("\naccept client from $actual_ip\n", 5);
513 my $in_msg = &read_from_socket($client);
514 if(defined $in_msg){
515 chomp($in_msg);
516 $crypted_msg = $in_msg;
517 } else {
518 daemon_log("cannot read from $actual_ip\n", 5);
519 }
520 }
521 close($client);
523 # validate acknowledge msg from server
524 $new_server_cipher = &create_ciphering($new_server_passwd);
525 my $msg_hash;
526 eval {
527 my $decrypted_msg = &decrypt_msg($crypted_msg, $new_server_cipher);
528 daemon_log("decrypted register msg: $decrypted_msg", 5);
529 $msg_hash = $xml->XMLin($decrypted_msg, ForceArray=>1);
530 };
531 if($@) {
532 daemon_log("ERROR: do not understand the incoming message:" , 5);
533 daemon_log("$@", 7);
534 } else {
535 my $header = @{$msg_hash->{header}}[0];
536 if($header eq "registered") {
537 $reg_server = $server;
538 last;
539 } elsif($header eq "denied") {
540 my $reason = (&get_content_from_xml_hash($msg_hash, "denied"))[0];
541 daemon_log("registration at $server denied: $reason", 1);
542 } else {
543 daemon_log("cannot register at $server", 1);
544 }
545 }
546 }
547 # if no answer arrive, try next server in list
549 }
551 if(defined $reg_server) {
552 daemon_log("registered at $reg_server", 1);
553 } else {
554 daemon_log("cannot register at any server", 1);
555 daemon_log("exiting!!!", 1);
556 exit(1);
557 }
559 # update the global available variables
560 $server_address = $reg_server;
561 $server_passwd = $new_server_passwd;
562 $server_cipher = $new_server_cipher;
563 return;
564 }
567 #=== FUNCTION ================================================================
568 # NAME: create_xml_hash
569 # PARAMETERS:
570 # RETURNS:
571 # DESCRIPTION:
572 #===============================================================================
573 #sub create_xml_hash {
574 # my ($header, $source, $target, $header_value) = @_;
575 # my $hash = {
576 # header => [$header],
577 # source => [$source],
578 # target => [$target],
579 # $header => [$header_value],
580 # };
581 # daemon_log("create_xml_hash:", 7),
582 # chomp(my $tmp = Dumper $hash);
583 # daemon_log("\t$tmp\n", 7);
584 # return $hash
585 #}
588 #=== FUNCTION ================================================================
589 # NAME: create_xml_string
590 # PARAMETERS:
591 # RETURNS:
592 # DESCRIPTION:
593 #===============================================================================
594 #sub create_xml_string {
595 # my ($xml_hash) = @_ ;
596 # my $xml_string = $xml->XMLout($xml_hash, RootName => 'xml');
597 # $xml_string =~ s/[\n]+//g;
598 # daemon_log("create_xml_string:\n\t$xml_string\n", 7);
599 # return $xml_string;
600 #}
603 #=== FUNCTION ================================================================
604 # NAME: add_content2xml_hash
605 # PARAMETERS:
606 # RETURNS:
607 # DESCRIPTION:
608 #===============================================================================
609 #sub add_content2xml_hash {
610 # my ($xml_ref, $element, $content) = @_;
611 # if(not exists $$xml_ref{$element} ) {
612 # $$xml_ref{$element} = [];
613 # }
614 # my $tmp = $$xml_ref{$element};
615 # push(@$tmp, $content);
616 # return;
617 #}
620 #=== FUNCTION ================================================================
621 # NAME: get_content_from_xml_hash
622 # PARAMETERS: ref : reference to the xml hash
623 # string: key of the value you want
624 # RETURNS: STRING AND ARRAY
625 # DESCRIPTION: if key of the hash is either 'header', 'target' or 'source' the
626 # function returns a string cause it is expected that these keys
627 # do just have one value, all other keys returns an array!!!
628 #===============================================================================
629 #sub get_content_from_xml_hash {
630 # my ($xml_ref, $element) = @_;
631 # my $result = $xml_ref->{$element};
632 # if( $element eq "header" || $element eq "target" || $element eq "source") {
633 # return @$result[0];
634 # }
635 # return @$result;
636 #}
638 # my ($xml_ref, $element) = @_;
639 # if (exists $xml_ref->{$element}) {
640 # my $result = $xml_ref->{$element};
641 # if( $element eq "header" || $element eq "target" || $element eq "source") {
642 # return @$result[0];
643 # } else {
644 # return @$result;
645 # }
646 #
647 # } else {
648 # my $result = ();
649 # return @$result;
650 # }
651 #}
654 #=== FUNCTION ================================================================
655 # NAME: encrypt_msg
656 # PARAMETERS:
657 # RETURNS:
658 # DESCRIPTION:
659 #===============================================================================
660 #sub encrypt_msg {
661 # my ($msg, $my_cipher) = @_;
662 # if(not defined $my_cipher) { print "no cipher object\n"; }
663 # $msg = "\0"x(16-length($msg)%16).$msg;
664 # my $crypted_msg = $my_cipher->encrypt($msg);
665 # chomp($crypted_msg = &encode_base64($crypted_msg));
666 # return $crypted_msg;
667 #}
670 #=== FUNCTION ================================================================
671 # NAME: decrypt_msg
672 # PARAMETERS:
673 # RETURNS:
674 # DESCRIPTION:
675 #===============================================================================
676 #sub decrypt_msg {
677 # my ($crypted_msg, $my_cipher) = @_ ;
678 # $crypted_msg = &decode_base64($crypted_msg);
679 # my $msg = $my_cipher->decrypt($crypted_msg);
680 # $msg =~ s/\0*//g;
681 # return $msg;
682 #}
685 #=== FUNCTION ================================================================
686 # NAME: create_ciphering
687 # PARAMETERS:
688 # RETURNS: cipher object
689 # DESCRIPTION:
690 #===============================================================================
691 #sub create_ciphering {
692 # my ($passwd) = @_;
693 # $passwd = substr(md5_hex("$passwd") x 32, 0, 32);
694 # my $iv = substr(md5_hex('GONICUS GmbH'),0, 16);
695 #
696 # #daemon_log("iv: $iv", 7);
697 # #daemon_log("key: $passwd", 7);
698 # my $my_cipher = Crypt::Rijndael->new($passwd , Crypt::Rijndael::MODE_CBC());
699 # $my_cipher->set_iv($iv);
700 # return $my_cipher;
701 #}
704 #=== FUNCTION ================================================================
705 # NAME: create_passwd
706 # PARAMETERS:
707 # RETURNS: cipher object
708 # DESCRIPTION:
709 #===============================================================================
710 sub create_passwd {
711 my $new_passwd = "";
712 for(my $i=0; $i<31; $i++) {
713 $new_passwd .= ("a".."z","A".."Z",0..9)[int(rand(62))]
714 }
716 return $new_passwd;
717 }
720 #=== FUNCTION ================================================================
721 # NAME: send_msg_hash2address
722 # PARAMETERS: msg string - xml message
723 # PeerAddr string - socket address to send msg
724 # PeerPort string - socket port, if not included in socket address
725 # RETURNS: nothing
726 # DESCRIPTION: ????
727 #===============================================================================
728 #sub send_msg_hash2address {
729 # my ($msg_hash, $address, $passwd) = @_ ;
730 #
731 # # fetch header for logging
732 # my $header = @{$msg_hash->{header}}[0];
733 #
734 # # generiere xml string
735 # my $msg_xml = &create_xml_string($msg_hash);
736 #
737 # # hole das entsprechende passwd aus dem hash
738 # if(not defined $passwd) {
739 # if(exists $known_hosts->{$address}) {
740 # $passwd = $known_hosts->{$address}->{passwd};
741 # } elsif ($address eq $server_address) {
742 # $passwd = $server_passwd;
743 # } else {
744 # daemon_log("$address not known, neither as server nor as client", 1);
745 # return "failed";
746 # }
747 # }
748 #
749 # # erzeuge ein ciphering object
750 # my $act_cipher = &create_ciphering($passwd);
751 #
752 # # encrypt xml msg
753 # my $crypted_msg = &encrypt_msg($msg_xml, $act_cipher);
754 #
755 # # öffne socket
756 # my $socket = &open_socket($address);
757 # if(not defined $socket){
758 # daemon_log("cannot open socket to $address, server not reachable", 1);
759 # daemon_log("cannot send '$header'-msg", 1);
760 # return "failed";
761 # }
762 #
763 # # versende xml msg
764 # print $socket $crypted_msg."\n";
765 #
766 # # schlieĂźe socket
767 # close $socket;
768 #
769 # daemon_log("send '$header'-msg to $address", 5);
770 # daemon_log("crypted_msg:\n\t$crypted_msg", 7);
771 #
772 # return "done";
773 #}
776 #=== FUNCTION ================================================================
777 # NAME: open_socket
778 # PARAMETERS: PeerAddr string something like 192.168.1.1 or 192.168.1.1:10000
779 # [PeerPort] string necessary if port not appended by PeerAddr
780 # RETURNS: socket IO::Socket::INET
781 # DESCRIPTION:
782 #===============================================================================
783 sub open_socket {
784 my ($PeerAddr, $PeerPort) = @_ ;
785 if(defined($PeerPort)){
786 $PeerAddr = $PeerAddr.":".$PeerPort;
787 }
788 my $socket;
789 $socket = new IO::Socket::INET(PeerAddr => $PeerAddr ,
790 Porto => "tcp" ,
791 Type => SOCK_STREAM,
792 Timeout => 5,
793 );
794 if(not defined $socket) {
795 #daemon_log("cannot connect to socket at $PeerAddr, $@\n");
796 return;
797 }
798 daemon_log("open_socket:\n\t$PeerAddr", 7);
799 return $socket;
800 }
803 #=== FUNCTION ================================================================
804 # NAME: read_from_socket
805 # PARAMETERS: socket fh -
806 # RETURNS: result string - readed characters from socket
807 # DESCRIPTION: reads data from socket in 16 byte steps
808 #===============================================================================
809 sub read_from_socket {
810 my ($socket) = @_;
811 my $result = "";
813 $socket->blocking(1);
814 $result = <$socket>;
816 $socket->blocking(0);
817 while ( my $char = <$socket> ) {
818 if (not defined $char) { last }
819 $result .= $char;
820 }
821 return $result;
825 # my ($socket) = @_;
826 # my $result = "";
827 # my $len = 16;
828 # while($len == 16){
829 # my $char;
830 # $len = sysread($socket, $char, 16);
831 # if($len != 16) { last }
832 # if($len != 16) { last }
833 # $result .= $char;
834 # }
835 # return $result;
836 }
839 #=== FUNCTION ================================================================
840 # NAME: print_known_hosts_hash
841 # PARAMETERS:
842 # RETURNS:
843 # DESCRIPTION:
844 #===============================================================================
845 sub print_known_hosts_hash {
846 my ($tmp) = @_;
847 print "####################################\n";
848 print "# status of known_hosts\n";
849 my $hosts;
850 my $host_hash;
851 my @hosts = keys %$known_hosts;
852 foreach my $host (@hosts) {
853 #my @elements = keys %$known_hosts->{$host};
854 my $status = $known_hosts->{$host}->{status} ;
855 my $passwd = $known_hosts->{$host}->{passwd};
856 my $timestamp = $known_hosts->{$host}->{timestamp};
857 print "$host\n";
858 print "\t$status\n";
859 print "\t$passwd\n";
860 print "\t$timestamp\n";
861 }
862 print "####################################\n";
863 return;
864 }
866 #=== FUNCTION ================================================================
867 # NAME:
868 # PARAMETERS:
869 # RETURNS:
870 # DESCRIPTION:
871 #===============================================================================
872 sub create_known_hosts_entry {
873 my ($hostname) = @_;
874 $known_hosts->{$hostname} = {};
875 $known_hosts->{$hostname}->{status} = "none";
876 $known_hosts->{$hostname}->{passwd} = "none";
877 $known_hosts->{$hostname}->{timestamp} = "none";
878 return;
879 }
882 #=== FUNCTION ================================================================
883 # NAME:
884 # PARAMETERS:
885 # RETURNS:
886 # DESCRIPTION:
887 #===============================================================================
888 sub update_known_hosts_entry {
889 my ($hostname, $status, $passwd, $timestamp) = @_;
890 my ($seconds, $minutes, $hours, $monthday, $month,
891 $year, $weekday, $yearday, $sommertime) = localtime(time);
892 $hours = $hours < 10 ? $hours = "0".$hours : $hours;
893 $minutes = $minutes < 10 ? $minutes = "0".$minutes : $minutes;
894 $seconds = $seconds < 10 ? $seconds = "0".$seconds : $seconds;
895 $month+=1;
896 $month = $month < 10 ? $month = "0".$month : $month;
897 $monthday = $monthday < 10 ? $monthday = "0".$monthday : $monthday;
898 $year+=1900;
899 my $t = "$year$month$monthday$hours$minutes$seconds";
901 if($status) {
902 $known_hosts->{$hostname}->{status} = $status;
903 }
904 if($passwd) {
905 $known_hosts->{$hostname}->{passwd} = $passwd;
906 }
907 if($timestamp) {
908 $t = $timestamp;
909 }
910 $known_hosts->{$hostname}->{timestamp} = $t;
911 return;
912 }
915 #=== FUNCTION ================================================================
916 # NAME:
917 # PARAMETERS:
918 # RETURNS:
919 # DESCRIPTION:
920 #===============================================================================
921 sub add_content2known_hosts {
922 my ($hostname, $element, $content) = @_;
923 my ($seconds, $minutes, $hours, $monthday, $month,
924 $year, $weekday, $yearday, $sommertime) = localtime(time);
925 $hours = $hours < 10 ? $hours = "0".$hours : $hours;
926 $minutes = $minutes < 10 ? $minutes = "0".$minutes : $minutes;
927 $seconds = $seconds < 10 ? $seconds = "0".$seconds : $seconds;
928 $month+=1;
929 $month = $month < 10 ? $month = "0".$month : $month;
930 $monthday = $monthday < 10 ? $monthday = "0".$monthday : $monthday;
931 $year+=1900;
932 my $t = "$year$month$monthday$hours$minutes$seconds";
934 $known_hosts->{$hostname}->{$element} = $content;
935 $known_hosts->{$hostname}->{timestamp} = $t;
936 return;
937 }
940 #=== FUNCTION ================================================================
941 # NAME:
942 # PARAMETERS:
943 # RETURNS:
944 # DESCRIPTION:
945 #===============================================================================
946 sub process_incoming_msg {
947 my ($crypted_msg) = @_;
948 if(not defined $crypted_msg) {
949 daemon_log("function 'process_incoming_msg': got no msg", 7);
950 }
951 $crypted_msg =~ /^([\s\S]*?)\.(\d{1,3}?)\.(\d{1,3}?)\.(\d{1,3}?)\.(\d{1,3}?)$/;
952 $crypted_msg = $1;
953 my $host = sprintf("%s.%s.%s.%s", $2, $3, $4, $5);
954 daemon_log("msg from host:", 1);
955 daemon_log("\t$host", 1);
956 daemon_log("crypted msg:", 7);
957 daemon_log("\t$crypted_msg", 7);
959 my $act_cipher = &create_ciphering($server_passwd);
961 # try to decrypt incoming msg
962 my ($msg, $msg_hash);
963 eval{
964 $msg = &decrypt_msg($crypted_msg, $act_cipher);
965 $msg_hash = $xml->XMLin($msg, ForceArray=>1);
966 };
967 if($@) {
968 daemon_log("ERROR: incoming msg cannot be decrypted with server passwd", 1);
969 return;
970 }
972 my $header = @{$msg_hash->{header}}[0];
974 daemon_log("receive '$header' from $host", 1);
975 # daemon_log("header from msg:", 1);
976 # daemon_log("\t$header", 1);
977 # daemon_log("msg to process:", 7);
978 # daemon_log("\t$msg", 7);
980 #check whether msg to process is a event
981 opendir(DIR, $event_dir)
982 or daemon_log("cannot find directory $event_dir, no events specified", 5);
983 my $file_name;
984 while(defined($file_name = readdir(DIR))){
985 if ($file_name eq "." || $file_name eq "..") {
986 next;
987 }
988 if ($file_name eq $header) {
989 my $cmd = "$event_dir/$file_name '$msg'";
990 my $result_xml = "";
991 open(PIPE, "$cmd 2>&1 |");
992 while(<PIPE>) {
993 $result_xml.=$_;
994 last;
995 }
996 close(PIPE);
997 my $res_hash = &transform_msg2hash($result_xml);
998 my $res_target = @{$res_hash->{target}}[0];
999 &send_msg_hash2address($res_hash, $server_address);
1001 return;
1002 }
1003 }
1004 close(DIR);
1005 daemon_log("could not assign the msg $header to an event", 5);
1007 if ($header eq 'new_ldap_config') { if ($ldap_enabled == 1) {&new_ldap_config($msg_hash)}}
1008 elsif ($header eq 'ping') { &got_ping($msg_hash) }
1009 elsif ($header eq 'wake_up') { &execute_event($msg_hash)}
1010 elsif ($header eq 'new_passwd') { &new_passwd()}
1011 else { daemon_log("ERROR: no function assigned to msg $header", 5) }
1013 return;
1014 }
1017 #=== FUNCTION ================================================================
1018 # NAME:
1019 # PARAMETERS:
1020 # RETURNS:
1021 # DESCRIPTION:
1022 #===============================================================================
1023 sub update_status {
1024 my ($new_status) = @_ ;
1025 my $out_hash = &create_xml_hash("update_status", $client_address, $server_address);
1026 &add_content2xml_hash($out_hash, "update_status", $new_status);
1027 &send_msg_hash2address($out_hash, $server_address);
1028 return;
1029 }
1032 #=== FUNCTION ================================================================
1033 # NAME:
1034 # PARAMETERS:
1035 # RETURNS:
1036 # DESCRIPTION:
1037 #===============================================================================
1038 sub server_leaving {
1039 my ($msg_hash) = @_ ;
1040 my $source = &get_content_from_xml_hash("source");
1041 my $header = &get_content_from_xml_hash("header");
1043 daemon_log("gosa daemon $source is going down, cause registration procedure", 1);
1044 my $server_address = "none";
1045 my $server_passwd = "none";
1046 my $server_cipher = "none";
1048 # reinitialization of default values in config file
1049 &read_configfile;
1051 # registrated at new daemon
1052 ®ister_at_server();
1054 return;
1055 }
1058 sub got_ping {
1059 my ($msg_hash) = @_ ;
1061 my $source = &get_content_from_xml_hash($msg_hash, 'source');
1062 my $target = &get_content_from_xml_hash($msg_hash, 'target');
1063 my $header = &get_content_from_xml_hash($msg_hash, 'header');
1065 &add_content2known_hosts(hostname=>$target, status=>$header);
1067 my $out_hash = &create_xml_hash("got_ping", $target, $source);
1068 &send_msg_hash2address($out_hash, $source, $server_passwd);
1070 return;
1071 }
1074 sub new_ldap_config {
1075 my ($msg_hash) = @_ ;
1076 my $element;
1077 my @ldap_uris;
1078 my $ldap_base;
1079 my @ldap_options;
1080 my @pam_options;
1081 my @nss_options;
1082 my $goto_admin;
1083 my $goto_secret;
1085 # Transform input into array
1086 while ( my ($key, $value) = each(%$msg_hash) ) {
1087 if ($key =~ /^(source|target|header)$/) {
1088 next;
1089 }
1091 foreach $element (@$value) {
1092 if ($key =~ /^ldap_uri$/) {
1093 push (@ldap_uris, $element);
1094 next;
1095 }
1096 if ($key =~ /^ldap_base$/) {
1097 $ldap_base= $element;
1098 next;
1099 }
1100 if ($key =~ /^goto_admin$/) {
1101 $goto_admin= $element;
1102 next;
1103 }
1104 if ($key =~ /^goto_secret$/) {
1105 $goto_secret= $element;
1106 next;
1107 }
1108 if ($key =~ /^ldap_cfg$/) {
1109 push (@ldap_options, "$element");
1110 next;
1111 }
1112 if ($key =~ /^pam_cfg$/) {
1113 push (@pam_options, "$element");
1114 next;
1115 }
1116 if ($key =~ /^nss_cfg$/) {
1117 push (@nss_options, "$element");
1118 next;
1119 }
1120 }
1121 }
1123 # Setup ldap.conf
1124 my $file1;
1125 my $file2;
1126 open(file1, "> $ldap_config");
1127 print file1 "# This file was automatically generated by gosa-si-client. Do not change.\n";
1128 print file1 "URI";
1129 foreach $element (@ldap_uris) {
1130 print file1 " $element";
1131 }
1132 print file1 "\nBASE $ldap_base\n";
1133 foreach $element (@ldap_options) {
1134 print file1 "$element\n";
1135 }
1136 close (file1);
1137 daemon_log("wrote $ldap_config", 5);
1139 # Setup pam_ldap.conf / libnss_ldap.conf
1140 open(file1, "> $pam_config");
1141 open(file2, "> $nss_config");
1142 print file1 "# This file was automatically generated by gosa-si-client. Do not change.\n";
1143 print file2 "# This file was automatically generated by gosa-si-client. Do not change.\n";
1144 print file1 "uri";
1145 print file2 "uri";
1146 foreach $element (@ldap_uris) {
1147 print file1 " $element";
1148 print file2 " $element";
1149 }
1150 print file1 "\nbase $ldap_base\n";
1151 print file2 "\nbase $ldap_base\n";
1152 foreach $element (@pam_options) {
1153 print file1 "$element\n";
1154 }
1155 foreach $element (@nss_options) {
1156 print file2 "$element\n";
1157 }
1158 close (file2);
1159 daemon_log("wrote $nss_config", 5);
1160 close (file1);
1161 daemon_log("wrote $pam_config", 5);
1163 # Create goto.secrets if told so
1164 if (defined $goto_admin){
1165 open(file1, "> /etc/goto/secret");
1166 close(file1);
1167 chown(0,0, "/etc/goto/secret");
1168 chmod(0600, "/etc/goto/secret");
1169 open(file1, "> /etc/goto/secret");
1170 print file1 $goto_admin.":".$goto_secret."\n";
1171 close(file1);
1172 daemon_log("wrote /etc/goto/secret", 5);
1173 }
1175 return;
1177 }
1180 sub execute_event {
1181 my ($msg_hash)= @_;
1182 my $configdir= '/etc/gosa-si/client/events/';
1183 my $result;
1185 my $header = &get_content_from_xml_hash($msg_hash, 'header');
1186 my $source = &get_content_from_xml_hash($msg_hash, 'source');
1187 my $target = &get_content_from_xml_hash($msg_hash, 'target');
1190 if((not defined $source)
1191 && (not defined $target)
1192 && (not defined $header)) {
1193 daemon_log("ERROR: Entries missing in XML msg for gosa events under $configdir");
1194 } else {
1195 my $parameters="";
1196 my @params = &get_content_from_xml_hash($msg_hash, $header);
1197 my $params = join(", ", @params);
1198 daemon_log("execute_event: got parameters: $params", 5);
1200 if (@params) {
1201 foreach my $param (@params) {
1202 my $param_value = (&get_content_from_xml_hash($msg_hash, $param))[0];
1203 daemon_log("execute_event: parameter -> value: $param -> $param_value", 7);
1204 $parameters.= " ".$param_value;
1205 }
1206 }
1208 my $cmd= $configdir.$header."$parameters";
1209 daemon_log("execute_event: executing cmd: $cmd", 7);
1210 $result= "";
1211 open(PIPE, "$cmd 2>&1 |");
1212 while(<PIPE>) {
1213 $result.=$_;
1214 }
1215 close(PIPE);
1216 }
1218 # process the event result
1221 return;
1222 }
1225 sub new_passwd {
1226 # my ($msg_hash) = @_ ;
1227 my $new_server_passwd = &create_passwd();
1228 my $new_server_cipher = &create_ciphering($new_server_passwd);
1230 my $out_hash = &create_xml_hash("new_passwd", $client_address, $server_address, $new_server_passwd);
1232 &send_msg_hash2address($out_hash, $server_address, $server_passwd);
1234 $server_passwd = $new_server_passwd;
1235 $server_cipher = $new_server_cipher;
1236 return;
1237 }
1242 #==== MAIN = main ==============================================================
1244 # parse commandline options
1245 Getopt::Long::Configure( "bundling" );
1246 GetOptions("h|help" => \&usage,
1247 "c|config=s" => \$cfg_file,
1248 "f|foreground" => \$foreground,
1249 "v|verbose+" => \$verbose,
1250 );
1252 # read and set config parameters
1253 &check_cmdline_param ;
1254 &read_configfile;
1255 &check_pid;
1257 if ( ! $foreground ) {
1258 open STDIN, '/dev/null' or die "Can’t read /dev/null: $!";
1259 open STDOUT, '>>/dev/null' or die "Can't write to /dev/null: $!";
1260 open STDERR, '>>/dev/null' or die "Can't write to /dev/null: $!";
1261 }
1264 # restart daemon log file
1265 if(-e $log_file ) { unlink $log_file }
1266 daemon_log(" ", 1);
1267 daemon_log("$0 started!", 1);
1269 # Just fork, if we"re not in foreground mode
1270 if( ! $foreground ) { $pid = fork(); }
1271 else { $pid = $$; }
1273 # Do something useful - put our PID into the pid_file
1274 if( 0 != $pid ) {
1275 open( LOCK_FILE, ">$pid_file" );
1276 print LOCK_FILE "$pid\n";
1277 close( LOCK_FILE );
1278 if( !$foreground ) { exit( 0 ) };
1279 }
1281 # detect own ip and mac address
1282 $network_interface= &get_interface_for_ip($client_ip);
1283 $client_mac_address= &get_mac($network_interface);
1285 # ($client_ip, $client_mac_address) = &get_ip_and_mac();
1286 #if (not defined $client_ip) {
1287 # die "EXIT: ip address of $0 could not be detected";
1288 #}
1289 daemon_log("client ip address detected: $client_ip", 1);
1290 daemon_log("client mac address detected: $client_mac_address", 1);
1292 # prepare variables
1293 if (defined $server_ip && defined $server_port) {
1294 $server_address = $server_ip.":".$server_port;
1295 }
1296 $client_address = $client_ip.":".$client_port;
1298 # setup xml parser
1299 $xml = new XML::Simple();
1301 # create input socket
1302 daemon_log(" ", 1);
1303 $rbits = $wbits = $ebits = "";
1304 $input_socket = IO::Socket::INET->new(LocalPort => $client_port,
1305 Type => SOCK_STREAM,
1306 Reuse => 1,
1307 Listen => 20,
1308 );
1309 if(not defined $input_socket){
1310 daemon_log("cannot be a tcp server at $client_port : $@\n");
1311 } else {
1312 daemon_log("start client at $client_address",1) ;
1313 vec($rbits, fileno $input_socket, 1) = 1;
1314 vec($wbits, fileno $input_socket, 1) = 1;
1315 }
1317 # register at server
1318 daemon_log(" ", 1);
1319 ®ister_at_server();
1322 ##############
1323 # Debugging
1324 #############
1325 #sleep(2);
1326 #&update_status("ich_bin_ein_neuer_status");
1328 ###################################
1329 #everything ready, okay, lets start
1330 ###################################
1331 while(1) {
1332 my ($rout, $wout);
1333 my $nf = select($rout=$rbits, $wout=$wbits, undef, undef);
1335 # error handling
1336 if($nf < 0 ) {
1337 }
1339 # something is coming in
1340 if(vec $rout, fileno $input_socket, 1) {
1341 my $client = $input_socket->accept();
1342 my $other_end = getpeername($client);
1344 if(not defined $other_end) {
1345 daemon_log("client cannot be identified: $!");
1346 } else {
1347 my ($port, $iaddr) = unpack_sockaddr_in($other_end);
1348 my $actual_ip = inet_ntoa($iaddr);
1349 daemon_log("accept client from $actual_ip", 5);
1350 my $in_msg = &read_from_socket($client);
1351 if(defined $in_msg){
1352 chomp($in_msg);
1353 $in_msg = $in_msg.".".$actual_ip;
1354 &process_incoming_msg($in_msg);
1356 }
1357 }
1358 }
1359 }