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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 1.20 by tdb, Wed Feb 28 10:53:13 2001 UTC vs.
Revision 1.30 by pjm2, Thu Mar 15 09:44:08 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 = 600;
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 == 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 (!chop $response eq "OK") {
124	>	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
125	>	close($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	>	chop $response;
135	>	$last_modified = $response;
136
137	<	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
137	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
138
139	<	print $sock "FILELIST\n";
140	<	$response = <$sock>;
141	<	chop $response;
142	<	$file_list = $response;
139	>	print $sock "FILELIST\n";
140	>	$response = <$sock>;
141	>	chop $response;
142	>	$file_list = $response;
143
144	<	print "File list obtained: $file_list\n";
144	>	print "File list obtained: $file_list\n";
145
146	<	print $sock "FQDN\n";
147	<	$response = <$sock>;
148	<	chop $response;
149	<	$fqdn = $response;
146	>	print $sock "FQDN\n";
147	>	$response = <$sock>;
148	>	chop $response;
149	>	$fqdn = $response;
150
151	<	print "FQDN returned: $fqdn\n";
151	>	print "FQDN returned: $fqdn\n";
152
153	<	print $sock "UDPUpdateTime\n";
154	<	$response = <$sock>;
155	<	chop $response;
156	<	$udp_update_time = $response;
153	>	print $sock "UDPUpdateTime\n";
154	>	$response = <$sock>;
155	>	chop $response;
156	>	$udp_update_time = $response;
157
158	<	print $sock "TCPUpdateTime\n";
159	<	$response = <$sock>;
160	<	chop $response;
161	<	$tcp_update_time = $response;
158	>	print $sock "TCPUpdateTime\n";
159	>	$response = <$sock>;
160	>	chop $response;
161	>	$tcp_update_time = $response;
162
163	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
163	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
164
165	<	print $sock "ENDCONFIG\n";
166	<	$response = <$sock>;
167	<	chomp $response;
168	<	if (!$response eq "OK") {
169	<	print "ENDCONFIG command to server failed.  Terminated.\n";
170	<	exit(1);
171	<	}
165	>	print $sock "ENDCONFIG\n";
166	>	$response = <$sock>;
167	>	chomp $response;
168	>	if (!$response eq "OK") {
169	>	print "ENDCONFIG command to server failed.  Terminated.\n";
170	>	close($sock);
171	>	wait_then_retry();
172	>	next;
173	>	}
174
175	<	print "Config ended.\n";
175	>	print "Config ended.\n";
176
177	<	print $sock "FILTER\n";
178	<	$response = <$sock>;
179	<	chop $response;
180	<	$response =~ /(.*);(.*);(.*)/;
181	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
177	>	print $sock "FILTER\n";
178	>	$response = <$sock>;
179	>	unless (defined($response)) {
180	>	print "Failed: Could not get a filter address from the filter manager.\n";
181	>	close($sock);
182	>	wait_then_retry();
183	>	next;
184	>	}
185	>	chop $response;
186	>	$response =~ /(.*);(.*);(.*)/;
187	>	if ($response eq "ERROR") {
188	>	print "There are no active configured filters for your host.\n";
189	>	close($sock);
190	>	wait_then_retry();
191	>	next;
192	>	}
193	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
194	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
195	>	print "Failed: Filter address response from server did not make sense: $response\n";
196	>	close($sock);
197	>	wait_then_retry();
198	>	next;
199	>	}
200
201	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
201	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
202
203	<	print $sock "END\n";
204	<	$response = <$sock>;
205	<	chop $response;
206	<	if ($response eq "OK") {
207	<	print "Host successfully configured via TCP.\n"
208	<	}
209	<	else {
210	<	print "The server failed the host configuration on the END command.";
211	<	exit(1);
212	<	}
203	>	print $sock "END\n";
204	>	$response = <$sock>;
205	>	chop $response;
206	>	if ($response eq "OK") {
207	>	print "Host successfully configured via TCP.\n"
208	>	}
209	>	else {
210	>	print "The server failed the host configuration on the END command.";
211	>	close($sock);
212	>	wait_then_retry();
213	>	next;
214	>	}
215
216	<	close($sock);
216	>	close($sock);
217
218	<	print "Configuration finished sucessfully!\n";
219	<
218	>	print "Configuration finished sucessfully!\n";
219	>	last;
220	>	}
221		return;
222		}
223
#	Line 269 | Line 315 | EOF
315		PeerPort => $udp_port,
316		PeerAddr => $filter_addr,
317		Proto => 'udp'
318	<	) or die "Socket: $!\n";
318	>	) or die "Could not send UDP: $!\n";
319
320		print $sock $xml or die "Could not send UDP packet: $!\n";
321		close($sock);
#	Line 293 | Line 339 | sub send_tcp_heartbeat() {
339		PeerAddr => $filter_addr,
340		PeerPort => $tcp_port,
341		Proto => 'tcp'
342	<	);
342	>	) or return;
343		if (!defined $sock) {
344		print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
345	+	&tcp_configure();
346		return;
347		}
348
#	Line 304 | Line 351 | sub send_tcp_heartbeat() {
351
352		print $sock "HEARTBEAT\n";
353		$response = <$sock>;
354	+	return if (!defined $response);
355		chop $response;
356		if (!$response eq "OK") {
357		close($sock);
358		print "Server gave wrong response to HEARTBEAT: $response\n";
359	+	&tcp_configure();
360		return;
361		}
362
363		print $sock "CONFIG\n";
364		$response = <$sock>;
365	+	return if (!defined $response);
366		chop $response;
367		if (!$response eq "OK") {
368		close($sock);
369		print "Server gave wrong response to CONFIG: $response\n";
370	+	&tcp_configure();
371		return;
372		}
373
374		print $sock "$file_list\n";
375		$response = <$sock>;
376	+	return if (!defined $response);
377		chop $response;
378		if (!$response eq "OK") {
379		close($sock);
380		print "Server gave wrong response to file list: $response\n";
381	+	&tcp_configure();
382		return;
383		}
384
385		print $sock "$last_modified\n";
386		$response = <$sock>;
387	+	return if (!defined $response);
388		chop $response;
389		if ($response eq "ERROR") {
390		close($sock);
391	+	print "Server configuration changed.  Reconfiguring with filter manager.\n";
392		&tcp_configure();
393		return;
394		}
395		if (!$response eq "OK") {
396		close($sock);
397		print "Server gave wrong response to HEARTBEAT: $response\n";
398	+	&tcp_configure();
399		return;
400		}
401
402		print $sock "ENDHEARTBEAT\n";
403		$response = <$sock>;
404	+	return if (!defined $response);
405		chop $response;
406		if (!$response eq "OK") {
407		close($sock);
408		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
409	+	&tcp_configure();
410		return;
411		}
412
413		close($sock);
414		print "^";
415	+
416	+	return;
417	+	}
418	+
419	+	#-----------------------------------------------------------------------
420	+	# write_pid
421	+	# Writes the PID (process ID) of this instance to $pidfile.
422	+	# This is then used by a seperate script to check (and restart) ihost.
423	+	#-----------------------------------------------------------------------
424	+	sub write_pid() {
425	+	open PID, ">$pidfile";
426	+	print PID $$;
427	+	close PID;
428
429		return;
430		}

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