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root/i-scream/projects/cms/source/host/ihost-perl/ihost.pl

Comparing projects/cms/source/host/ihost-perl/ihost.pl (file contents):
Revision 1.18 by pjm2, Tue Feb 27 19:26:51 2001 UTC vs.
Revision 1.32 by pjm2, Fri Mar 16 18:25:59 2001 UTC

#	Line 33 | Line 33 | use vars qw (
33		$filter_addr
34		$file_list
35		$fqdn
36	+	$pidfile
37	+	$retry_wait
38		);
39
40		if (@ARGV != 2) {
#	Line 43 | Line 45 | $filter_manager_addr = $ARGV[0];
45		$filter_manager_port = $ARGV[1];
46
47		$seq_no = 1;
48	+	$retry_wait = 6;
49
50	+	# write our PID to a file
51	+	$pidfile = "/var/tmp/ihost.pid";
52	+	&write_pid();
53	+
54		&tcp_configure();
55		&send_udp_packet();
56
#	Line 71 | Line 78 | while (1) {
78		`sleep $delay`;
79		}
80
81	+	# we'll probably never get here...
82	+	`rm -f $pidfile`;
83		exit(0);
84
85
86		#-----------------------------------------------------------------------
87	+	# wait_then_retry
88	+	# Waits for the period of time specified in $retry_wait, then attempts
89	+	# to reconfigure with the server.
90	+	#-----------------------------------------------------------------------
91	+	sub wait_then_retry() {
92	+	print "Will retry configuration with filter manager in $retry_wait seconds.\n";
93	+	`sleep $retry_wait`;
94	+	}
95	+
96	+
97	+	#-----------------------------------------------------------------------
98		# tcp_configure
99		# Establishes a TCP connection to the specified i-scream filter manager.
100		# The host then requests details from the server, such as the intervals
#	Line 82 | Line 102 | exit(0);
102		#-----------------------------------------------------------------------
103		sub tcp_configure() {
104
105	<	my($sock) = new IO::Socket::INET(
106	<	PeerAddr => $filter_manager_addr,
107	<	PeerPort => $filter_manager_port,
108	<	Proto => 'tcp'
109	<	);
110	<	if (!defined $sock) {
111	<	print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
112	<	print "Please check that there is an i-scream server at this address.\n";
113	<	print "Program ended.\n";
114	<	exit(1);
115	<	}
105	>	while (1) {
106	>	my($sock) = new IO::Socket::INET(
107	>	PeerAddr => $filter_manager_addr,
108	>	PeerPort => $filter_manager_port,
109	>	Proto => 'tcp'
110	>	) or die "Cannot connect!";
111	>	if (!defined $sock) {
112	>	print "IHOST ERROR: Could not connect to $filter_manager_addr:$filter_manager_port.\n";
113	>	print "Please check that there is an i-scream server at this address.\n";
114	>	wait_then_retry();
115	>	next;
116	>	}
117
118	<	# Now run through the configuration process...
119	<	my($response);
118	>	# Now run through the configuration process...
119	>	my($response);
120
121	<	print $sock "STARTCONFIG\n";
122	<	$response = <$sock>;
123	<	if (!chop $response eq "OK") {
124	<	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
125	<	exit(1);
126	<	}
121	>	print $sock "STARTCONFIG\n";
122	>	$response = <$sock>;
123	>	if ($response && !($response eq "OK\n")) {
124	>	print "The i-scream server rejected the STARTCONFIG command.\n";
125	>	close($sock);
126	>	wait_then_retry();
127	>	next;
128	>	}
129
130	<	print "Config started okay.\n";
130	>	print "Config started okay.\n";
131
132	<	print $sock "LASTMODIFIED\n";
133	<	$response = <$sock>;
134	<	chop $response;
135	<	$last_modified = $response;
132	>	print $sock "LASTMODIFIED\n";
133	>	$response = <$sock>;
134	>	if (!$response) {
135	>	print "The i-scream server did not return anything for the LASTMODIFIED command.\n";
136	>	close($sock);
137	>	wait_then_retry();
138	>	next;
139	>	}
140	>	chop $response;
141	>	$last_modified = $response;
142
143	<	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
143	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
144
145	<	print $sock "FILELIST\n";
146	<	$response = <$sock>;
147	<	chop $response;
148	<	$file_list = $response;
145	>	print $sock "FILELIST\n";
146	>	$response = <$sock>;
147	>	if (!$response) {
148	>	print "The i-scream server did not provide a configuration file list.\n";
149	>	close($sock);
150	>	wait_then_retry();
151	>	next;
152	>	}
153	>	chop $response;
154	>	$file_list = $response;
155
156	<	print "File list obtained: $file_list\n";
156	>	print "File list obtained: $file_list\n";
157
158	<	print $sock "FQDN\n";
159	<	$response = <$sock>;
160	<	chop $response;
161	<	$fqdn = $response;
158	>	print $sock "FQDN\n";
159	>	$response = <$sock>;
160	>	if (!$response) {
161	>	print "The i-scream server did not tell us our FQDN.\n";
162	>	close($sock);
163	>	wait_then_retry();
164	>	next;
165	>	}
166	>	chop $response;
167	>	$fqdn = $response;
168
169	<	print "FQDN returned: $fqdn\n";
169	>	print "FQDN returned: $fqdn\n";
170
171	<	print $sock "UDPUpdateTime\n";
172	<	$response = <$sock>;
173	<	chop $response;
174	<	$udp_update_time = $response;
171	>	print $sock "UDPUpdateTime\n";
172	>	$response = <$sock>;
173	>	if (!$response) {
174	>	print "The i-scream server did not give us a UDPUpdateTime.\n";
175	>	close($sock);
176	>	wait_then_retry();
177	>	next;
178	>	}
179	>	chop $response;
180	>	$udp_update_time = $response;
181
182	<	print $sock "TCPUpdateTime\n";
183	<	$response = <$sock>;
184	<	chop $response;
185	<	$tcp_update_time = $response;
182	>	print $sock "TCPUpdateTime\n";
183	>	$response = <$sock>;
184	>	if (!$response) {
185	>	print "The i-scream server did not give us a TCPUpdateTime.\n";
186	>	close($sock);
187	>	wait_then_retry();
188	>	next;
189	>	}
190	>	chop $response;
191	>	$tcp_update_time = $response;
192
193	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
193	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
194
195	<	print $sock "ENDCONFIG\n";
196	<	$response = <$sock>;
197	<	chomp $response;
198	<	if (!$response eq "OK") {
199	<	print "ENDCONFIG command to server failed.  Terminated.\n";
200	<	exit(1);
201	<	}
195	>	print $sock "ENDCONFIG\n";
196	>	$response = <$sock>;
197	>	if ($response && !($response eq "OK\n")) {
198	>	print "ENDCONFIG command to server failed.  Terminated.\n";
199	>	close($sock);
200	>	wait_then_retry();
201	>	next;
202	>	}
203
204	<	print "Config ended.\n";
204	>	print "Config ended.\n";
205
206	<	print $sock "FILTER\n";
207	<	$response = <$sock>;
208	<	chop $response;
209	<	$response =~ /(.*);(.*);(.*)/;
210	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
206	>	print $sock "FILTER\n";
207	>	$response = <$sock>;
208	>	if (!$response) {
209	>	print "Failed: Could not get a filter address from the filter manager.\n";
210	>	close($sock);
211	>	wait_then_retry();
212	>	next;
213	>	}
214	>	chop $response;
215	>	$response =~ /^(.*);(.*);(.*)/;
216	>	if ($response eq "ERROR") {
217	>	print "There are no active configured filters for your host.\n";
218	>	close($sock);
219	>	wait_then_retry();
220	>	next;
221	>	}
222	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
223	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
224	>	print "Failed: Filter address response from server did not make sense: $response\n";
225	>	close($sock);
226	>	wait_then_retry();
227	>	next;
228	>	}
229
230	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
230	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
231
232	<	print $sock "END\n";
233	<	$response = <$sock>;
234	<	chop $response;
235	<	if ($response eq "OK") {
236	<	print "Host successfully configured via TCP.\n"
237	<	}
238	<	else {
239	<	print "The server failed the host configuration on the END command.";
240	<	exit(1);
241	<	}
232	>	print $sock "END\n";
233	>	$response = <$sock>;
234	>	if ($response && ($response eq "OK\n")) {
235	>	print "Host successfully configured via TCP.\n"
236	>	}
237	>	else {
238	>	print "The server failed the host configuration on the END command.\n";
239	>	close($sock);
240	>	wait_then_retry();
241	>	next;
242	>	}
243
244	<	close($sock);
244	>	close($sock);
245
246	<	print "Configuration finished sucessfully!\n";
247	<
246	>	print "Configuration finished sucessfully!\n";
247	>	last;
248	>	}
249		return;
250		}
251
#	Line 209 | Line 283 | sub send_udp_packet() {
283		}
284		$disk_info .= "</disk>";
285
286	<	my($machine_name) = hostname();
213	<	my($ip) = inet_ntoa(scalar(gethostbyname($machine_name)) || 'localhost');
286	>	my($ip) = inet_ntoa(scalar(gethostbyname(hostname())) || 'localhost');
287
288		# Build the XML packet this way, as we can clearly
289		# see the structure and contents... I like this ;-)
#	Line 218 | Line 291 | sub send_udp_packet() {
291		# larger than 8196 bytes]
292		my($xml) = <<EOF;
293
294	<	<packet seq_no="$seq_no" machine_name="$machine_name" date="$date" type="data" ip="$ip">
294	>	<packet seq_no="$seq_no" machine_name="$fqdn" date="$date" type="data" ip="$ip">
295		<load>
296		<load1>$packet{"packet.load.load1"}</load1>
297		<load5>$packet{"packet.load.load5"}</load5>
#	Line 265 | Line 338 | EOF
338
339		# Make the packet smaller by stripping out newlines and leading spaces.
340		$xml =~ s/\n\s*//g;
341	<
341	>
342		my($sock) = new IO::Socket::INET (
343		PeerPort => $udp_port,
344		PeerAddr => $filter_addr,
345		Proto => 'udp'
346	<	) or die "Socket: $!\n";
346	>	) or die "Could not send UDP: $!\n";
347
348		print $sock $xml or die "Could not send UDP packet: $!\n";
349		close($sock);
#	Line 294 | Line 367 | sub send_tcp_heartbeat() {
367		PeerAddr => $filter_addr,
368		PeerPort => $tcp_port,
369		Proto => 'tcp'
370	<	);
370	>	) or return;
371		if (!defined $sock) {
372		print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
373	+	&tcp_configure();
374		return;
375		}
376
#	Line 305 | Line 379 | sub send_tcp_heartbeat() {
379
380		print $sock "HEARTBEAT\n";
381		$response = <$sock>;
382	<	chop $response;
309	<	if (!$response eq "OK") {
382	>	if (!$response eq "OK\n") {
383		close($sock);
384		print "Server gave wrong response to HEARTBEAT: $response\n";
385	+	&tcp_configure();
386		return;
387		}
388
389		print $sock "CONFIG\n";
390		$response = <$sock>;
391	<	chop $response;
318	<	if (!$response eq "OK") {
391	>	if (!$response eq "OK\n") {
392		close($sock);
393		print "Server gave wrong response to CONFIG: $response\n";
394	+	&tcp_configure();
395		return;
396		}
397
398		print $sock "$file_list\n";
399		$response = <$sock>;
400	<	chop $response;
327	<	if (!$response eq "OK") {
400	>	if (!$response eq "OK\n") {
401		close($sock);
402		print "Server gave wrong response to file list: $response\n";
403	+	&tcp_configure();
404		return;
405		}
406
407		print $sock "$last_modified\n";
408		$response = <$sock>;
409	<	chop $response;
336	<	if ($response eq "ERROR") {
409	>	if ($response eq "ERROR\n") {
410		close($sock);
411	+	print "Server configuration changed.  Reconfiguring with filter manager.\n";
412		&tcp_configure();
413		return;
414		}
415	<	if (!$response eq "OK") {
415	>	if (!$response eq "OK\n") {
416		close($sock);
417		print "Server gave wrong response to HEARTBEAT: $response\n";
418	+	&tcp_configure();
419		return;
420		}
421
422		print $sock "ENDHEARTBEAT\n";
423		$response = <$sock>;
424	<	chop $response;
350	<	if (!$response eq "OK") {
424	>	if (!$response eq "OK\n") {
425		close($sock);
426		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
427	+	&tcp_configure();
428		return;
429		}
430
431		close($sock);
432		print "^";
433	+
434	+	return;
435	+	}
436	+
437	+	#-----------------------------------------------------------------------
438	+	# write_pid
439	+	# Writes the PID (process ID) of this instance to $pidfile.
440	+	# This is then used by a seperate script to check (and restart) ihost.
441	+	#-----------------------------------------------------------------------
442	+	sub write_pid() {
443	+	open PID, ">$pidfile";
444	+	print PID $$;
445	+	close PID;
446
447		return;
448		}

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