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root/i-scream/projects/cms/source/host/ihost-perl/ihost.pl
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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.16 by tdb, Tue Feb 13 12:28:50 2001 UTC vs.
Revision 1.27 by pjm2, Wed Mar 14 18:00:16 2001 UTC

# Line 32 | Line 32 | use vars qw (
32               $tcp_port
33               $filter_addr
34               $file_list
35 +             $fqdn
36 +             $pidfile
37              );
38  
39   if (@ARGV != 2) {
# Line 43 | Line 45 | $filter_manager_port = $ARGV[1];
45  
46   $seq_no = 1;
47  
48 + # write our PID to a file
49 + $pidfile = "/var/tmp/ihost.pid";
50 + &write_pid();
51 +
52   &tcp_configure();
53   &send_udp_packet();
54  
# Line 70 | Line 76 | while (1) {
76      `sleep $delay`;
77   }
78  
79 + # we'll probably never get here...
80 + `rm -f $pidfile`;
81   exit(0);
82  
83  
# Line 85 | Line 93 | sub tcp_configure() {
93                                       PeerAddr => $filter_manager_addr,
94                                       PeerPort => $filter_manager_port,
95                                       Proto => 'tcp'
96 <                                    );
96 >                                    ) or die "Cannot connect!";
97      if (!defined $sock) {
98          print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
99          print "Please check that there is an i-scream server at this address.\n";
# Line 119 | Line 127 | sub tcp_configure() {
127  
128      print "File list obtained: $file_list\n";
129  
130 +    print $sock "FQDN\n";
131 +    $response = <$sock>;
132 +    chop $response;
133 +    $fqdn = $response;
134 +
135 +    print "FQDN returned: $fqdn\n";
136 +
137      print $sock "UDPUpdateTime\n";
138      $response = <$sock>;
139      chop $response;
# Line 143 | Line 158 | sub tcp_configure() {
158      
159      print $sock "FILTER\n";
160      $response = <$sock>;
161 +    unless (defined($response)) {
162 +        print "Failed: Could not get a filter address from the filter manager.\n";
163 +        exit(1);
164 +    }
165      chop $response;
166      $response =~ /(.*);(.*);(.*)/;
167      ($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
168 +    unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
169 +        print "Failed: Filter address response from server did not make sense: $response\n";
170 +        exit(1);
171 +    }
172      
173      print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
174  
# Line 201 | Line 224 | sub send_udp_packet() {
224      }
225      $disk_info .= "</disk>";
226  
227 <    my($hostname) = hostname();
205 <    $hostname =~ s/\..*$//g;
206 <    my($resolv) = `cat /etc/resolv.conf`;
207 <    my($domainname);
208 <    my($machine_name);
209 <    if($resolv =~ /domain\s+([^\s]+)/) {
210 <        # some machines have domain <domain> in resolv.conf
211 <        $domainname = $1;
212 <        $machine_name = "$hostname.$domainname";
213 <    }
214 <    elsif($resolv =~ /search\s+([^\s]+)/) {
215 <        # some machines have search <domain> in resolv.conf
216 <        $domainname = $1;
217 <        $machine_name = "$hostname.$domainname";
218 <    }
219 <    else {
220 <        # we can't find out the domain
221 <        $machine_name = $hostname;
222 <    }
223 <    my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
227 >    my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');
228  
229      # Build the XML packet this way, as we can clearly
230      # see the structure and contents... I like this ;-)
# Line 228 | Line 232 | sub send_udp_packet() {
232      # larger than 8196 bytes]
233      my($xml) = <<EOF;
234      
235 < <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
235 > <packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
236      <load>
237          <load1>$packet{"packet.load.load1"}</load1>
238          <load5>$packet{"packet.load.load5"}</load5>
# Line 275 | Line 279 | EOF
279  
280      # Make the packet smaller by stripping out newlines and leading spaces.
281      $xml =~ s/\n\s*//g;
282 <    
282 >
283      my($sock) = new IO::Socket::INET (
284                                        PeerPort => $udp_port,
285                                        PeerAddr => $filter_addr,
286                                        Proto => 'udp'
287 <                                     ) or die "Socket: $!\n";
287 >                                     ) or die "Could not send UDP: $!\n";
288  
289      print $sock $xml or die "Could not send UDP packet: $!\n";
290      close($sock);
# Line 304 | Line 308 | sub send_tcp_heartbeat() {
308                                       PeerAddr => $filter_addr,
309                                       PeerPort => $tcp_port,
310                                       Proto => 'tcp'
311 <                                    );
311 >                                    ) or return;
312      if (!defined $sock) {
313          print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
314 +        &tcp_configure();
315          return;
316      }
317  
# Line 315 | Line 320 | sub send_tcp_heartbeat() {
320  
321      print $sock "HEARTBEAT\n";
322      $response = <$sock>;
323 +    return if (!defined $response);
324      chop $response;
325      if (!$response eq "OK") {
326          close($sock);
327          print "Server gave wrong response to HEARTBEAT: $response\n";
328 +        &tcp_configure();
329          return;
330      }
331      
332      print $sock "CONFIG\n";
333      $response = <$sock>;
334 +    return if (!defined $response);
335      chop $response;
336      if (!$response eq "OK") {
337          close($sock);
338          print "Server gave wrong response to CONFIG: $response\n";
339 +        &tcp_configure();
340          return;
341      }
342  
343      print $sock "$file_list\n";
344      $response = <$sock>;
345 +    return if (!defined $response);
346      chop $response;
347      if (!$response eq "OK") {
348          close($sock);
349          print "Server gave wrong response to file list: $response\n";
350 +        &tcp_configure();
351          return;
352      }
353      
354      print $sock "$last_modified\n";
355      $response = <$sock>;
356 +    return if (!defined $response);
357      chop $response;
358      if ($response eq "ERROR") {
359          close($sock);
360 +        print "Server configuration changed.  Reconfiguring with filter manager.\n";
361          &tcp_configure();
362          return;
363      }
364      if (!$response eq "OK") {
365          close($sock);
366          print "Server gave wrong response to HEARTBEAT: $response\n";
367 +        &tcp_configure();
368          return;
369      }
370      
371      print $sock "ENDHEARTBEAT\n";
372      $response = <$sock>;
373 +    return if (!defined $response);
374      chop $response;
375      if (!$response eq "OK") {
376          close($sock);
377          print "Server gave wrong response to ENDHEARTBEAT: $response\n";
378 +        &tcp_configure();
379          return;
380      }
381      
382      close($sock);
383      print "^";
384 +    
385 +    return;
386 + }
387 +
388 + #-----------------------------------------------------------------------
389 + # write_pid
390 + # Writes the PID (process ID) of this instance to $pidfile.
391 + # This is then used by a seperate script to check (and restart) ihost.
392 + #-----------------------------------------------------------------------
393 + sub write_pid() {
394 +    open PID, ">$pidfile";
395 +    print PID $$;
396 +    close PID;
397      
398      return;
399   }

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