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Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.5 by pjm2, Fri Jan 26 17:41:48 2001 UTC vs.
Revision 1.14 by pjm2, Mon Feb 5 17:20:07 2001 UTC

# Line 1 | Line 1
1 < #!/usr/local/bin/perl -w
1 > #!/usr/bin/perl -w
2  
3   # -----------------------------------------------------------
4   # Perl i-scream Host.
5 + # http://www.i-scream.org.uk
6   #
7   # An all-in-one script to act as an i-scream host on
8   # a typical Unix/Linux box.  You may adapt the data-gathering
# Line 48 | Line 49 | $seq_no = 1;
49   $last_udp_time = time;
50   $last_tcp_time = time;
51   while (1) {
52 <    if (time >= $last_udp_time + $udp_update_time) {
52 >    my($time) = time;
53 >    if ($time >= $last_udp_time + $udp_update_time) {
54          &send_udp_packet();
55 <        $last_udp_time = time;
55 >        $last_udp_time = $time;
56      }
57 <    if (time >= $last_tcp_time + $tcp_update_time) {
57 >    if ($time >= $last_tcp_time + $tcp_update_time) {
58          &send_tcp_heartbeat();
59 <        $last_tcp_time = time;
59 >        $last_tcp_time = $time;
60      }
61 <    `sleep 1`;
61 >    my($next_udp) = $udp_update_time - $time + $last_udp_time;
62 >    my($next_tcp) = $tcp_update_time - $time + $last_tcp_time;
63 >    my($delay);
64 >    if ($next_udp < $next_tcp) {
65 >        $delay = $next_udp
66 >    }
67 >    else {
68 >        $delay = $next_tcp;
69 >    }
70 >    `sleep $delay`;
71   }
72  
73   exit(0);
74  
75 +
76 + #-----------------------------------------------------------------------
77 + # tcp_configure
78 + # Establishes a TCP connection to the specified i-scream filter manager.
79 + # The host then requests details from the server, such as the intervals
80 + # at which to send UDP packets.
81 + #-----------------------------------------------------------------------
82   sub tcp_configure() {
83      
84      my($sock) = new IO::Socket::INET(
85                                       PeerAddr => $filter_manager_addr,
86                                       PeerPort => $filter_manager_port,
87                                       Proto => 'tcp'
88 <                                    ) or die "Could not perform configuration via TCP: $!\n";
88 >                                    );
89 >    if (!defined $sock) {
90 >        print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
91 >        print "Please check that there is an i-scream server at this address.\n";
92 >        print "Program ended.\n";
93 >        exit(1);
94 >    }
95  
96 <    die "Could not connect to the i-scream filter manager: $!\n" unless $sock;
73 <
74 <    # Now run through the configuration process.
96 >    # Now run through the configuration process...
97      my($response);
98      
99      print $sock "STARTCONFIG\n";
# Line 88 | Line 110 | sub tcp_configure() {
110      chop $response;
111      $last_modified = $response;
112      
113 <    print "Config last modified: ". scalar localtime $last_modified . "\n";
113 >    print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
114  
115      print $sock "FILELIST\n";
116      $response = <$sock>;
# Line 107 | Line 129 | sub tcp_configure() {
129      chop $response;
130      $tcp_update_time = $response;
131      
132 <    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time.\n";
132 >    print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
133  
134      print $sock "ENDCONFIG\n";
135      $response = <$sock>;
# Line 141 | Line 163 | sub tcp_configure() {
163      close($sock);
164  
165      print "Configuration finished sucessfully!\n";
166 +    
167 +    return;
168   }
169  
170 +
171 +
172 +
173 + #-----------------------------------------------------------------------
174 + # send_udp_packet
175 + # Sends a UDP packet to an i-scream filter.
176 + # The packet contains XML markup describing some of the machine's state.
177 + # Receipt of UDP packets is not guaranteed.
178 + #-----------------------------------------------------------------------
179   sub send_udp_packet() {
180  
181      my(@statgrab) = `./statgrab.pl`;
182      my(%packet);
183 <    for (my($i) = 0; $i < $#statgrab; $i++) {
183 >    for (my($i) = 0; $i <= $#statgrab; $i++) {
184          $statgrab[$i] =~ /^([^\s]*) (.*)$/;
185          $packet{$1} = $2;
186      }
# Line 170 | Line 203 | sub send_udp_packet() {
203  
204      my($hostname) = hostname();
205      $hostname =~ s/\..*$//g;
206 <    my($domainname) = `cat /etc/resolv.conf`;
207 <    $domainname =~ s/domain\s*([^\s]*?)/$1/;
206 >    `cat /etc/resolv.conf` =~ /domain\s+([^\s]+)/;
207 >    my($domainname) = $1;
208      my($machine_name) = "$hostname.$domainname";
209      my($ip) = inet_ntoa(scalar(gethostbyname($hostname)) || 'localhost');
210  
211      # Build the XML packet this way, as we can clearly
212      # see the structure and contents... I like this ;-)
213 +    # [Note that the server rejects UDP packets that are
214 +    # larger than 8196 bytes]
215      my($xml) = <<EOF;
216      
217   <packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
# Line 191 | Line 226 | sub send_udp_packet() {
226          <platform>$packet{"packet.os.platform"}</platform>
227          <sysname>$packet{"packet.os.sysname"}</sysname>
228          <version>$packet{"packet.os.version"}</version>
229 +        <uptime>$packet{"packet.os.uptime"}</uptime>
230      </os>
231      <users>
232          <count>$packet{"packet.users.count"}</count>
# Line 211 | Line 247 | sub send_udp_packet() {
247          <swap>$packet{"packet.cpu.swap"}</swap>
248      </cpu>
249      <memory>
250 <        <total>$packet{"packet.memory.real"}</total>
250 >        <total>$packet{"packet.memory.total"}</total>
251          <free>$packet{"packet.memory.free"}</free>
252      </memory>
253      <swap>
254 <        <total>$packet{"packet.memory.swap_total"}</total>
255 <        <free>$packet{"packet.memory.swap_free"}</free>
254 >        <total>$packet{"packet.swap.total"}</total>
255 >        <free>$packet{"packet.swap.free"}</free>
256      </swap>
257      $disk_info
258   </packet>
259  
260   EOF
261  
262 +    # Make the packet smaller by stripping out newlines and leading spaces.
263      $xml =~ s/\n\s*//g;
264      
265      my($sock) = new IO::Socket::INET (
# Line 235 | Line 272 | EOF
272      close($sock);
273      $seq_no++;
274      print "-";
275 +    
276 +    return;
277   }
278  
279 +
280 +
281 +
282 + #-----------------------------------------------------------------------
283 + # send_tcp_heartbeat
284 + # Establishes a TCP connection to an i-scream filter.
285 + # The heartbeat is used as a guaranteed "I'm alive" delivery mechanism.
286 + #-----------------------------------------------------------------------
287   sub send_tcp_heartbeat() {
288  
289      my($sock) = new IO::Socket::INET(
290                                       PeerAddr => $filter_addr,
291                                       PeerPort => $tcp_port,
292                                       Proto => 'tcp'
293 <                                    ) or die "Could not perform heartbeat via TCP: $!\n";
293 >                                    );
294 >    if (!defined $sock) {
295 >        print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
296 >        return;
297 >    }
298  
248    die "Could not connect to the i-scream filter: $!\n" unless $sock;
249
299      # Now run through the configuration process.
300      my($response);
301  
# Line 302 | Line 351 | sub send_tcp_heartbeat() {
351      
352      close($sock);
353      print "^";
354 +    
355 +    return;
356   }

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