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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 1.22 by pjm2, Thu Mar 1 10:49:27 2001 UTC vs.
Revision 1.28 by pjm2, Wed Mar 14 18:48:33 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	<	) or die "Cannot connect!";
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	>	close($sock);
115	>	wait_then_retry();
116	>	next;
117	>	}
118
119	<	# Now run through the configuration process...
120	<	my($response);
119	>	# Now run through the configuration process...
120	>	my($response);
121
122	<	print $sock "STARTCONFIG\n";
123	<	$response = <$sock>;
124	<	if (!chop $response eq "OK") {
125	<	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
126	<	exit(1);
127	<	}
122	>	print $sock "STARTCONFIG\n";
123	>	$response = <$sock>;
124	>	if (!chop $response eq "OK") {
125	>	print "The i-scream server rejected the STARTCONFIG command.  Terminated.";
126	>	close($sock);
127	>	wait_then_retry();
128	>	next;
129	>	}
130
131	<	print "Config started okay.\n";
131	>	print "Config started okay.\n";
132
133	<	print $sock "LASTMODIFIED\n";
134	<	$response = <$sock>;
135	<	chop $response;
136	<	$last_modified = $response;
133	>	print $sock "LASTMODIFIED\n";
134	>	$response = <$sock>;
135	>	chop $response;
136	>	$last_modified = $response;
137
138	<	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
138	>	print "Config last modified: ". (scalar localtime $last_modified/1000) . "\n";
139
140	<	print $sock "FILELIST\n";
141	<	$response = <$sock>;
142	<	chop $response;
143	<	$file_list = $response;
140	>	print $sock "FILELIST\n";
141	>	$response = <$sock>;
142	>	chop $response;
143	>	$file_list = $response;
144
145	<	print "File list obtained: $file_list\n";
145	>	print "File list obtained: $file_list\n";
146
147	<	print $sock "FQDN\n";
148	<	$response = <$sock>;
149	<	chop $response;
150	<	$fqdn = $response;
147	>	print $sock "FQDN\n";
148	>	$response = <$sock>;
149	>	chop $response;
150	>	$fqdn = $response;
151
152	<	print "FQDN returned: $fqdn\n";
152	>	print "FQDN returned: $fqdn\n";
153
154	<	print $sock "UDPUpdateTime\n";
155	<	$response = <$sock>;
156	<	chop $response;
157	<	$udp_update_time = $response;
154	>	print $sock "UDPUpdateTime\n";
155	>	$response = <$sock>;
156	>	chop $response;
157	>	$udp_update_time = $response;
158
159	<	print $sock "TCPUpdateTime\n";
160	<	$response = <$sock>;
161	<	chop $response;
162	<	$tcp_update_time = $response;
159	>	print $sock "TCPUpdateTime\n";
160	>	$response = <$sock>;
161	>	chop $response;
162	>	$tcp_update_time = $response;
163
164	<	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
164	>	print "UDP packet period: $udp_update_time seconds.\nTCP heartbeat period: $tcp_update_time seconds.\n";
165
166	<	print $sock "ENDCONFIG\n";
167	<	$response = <$sock>;
168	<	chomp $response;
169	<	if (!$response eq "OK") {
170	<	print "ENDCONFIG command to server failed.  Terminated.\n";
171	<	exit(1);
172	<	}
166	>	print $sock "ENDCONFIG\n";
167	>	$response = <$sock>;
168	>	chomp $response;
169	>	if (!$response eq "OK") {
170	>	print "ENDCONFIG command to server failed.  Terminated.\n";
171	>	close($sock);
172	>	wait_then_retry();
173	>	next;
174	>	}
175
176	<	print "Config ended.\n";
176	>	print "Config ended.\n";
177
178	<	print $sock "FILTER\n";
179	<	$response = <$sock>;
180	<	chop $response;
181	<	$response =~ /(.*);(.*);(.*)/;
182	<	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
178	>	print $sock "FILTER\n";
179	>	$response = <$sock>;
180	>	unless (defined($response)) {
181	>	print "Failed: Could not get a filter address from the filter manager.\n";
182	>	close($sock);
183	>	wait_then_retry();
184	>	next;
185	>	}
186	>	chop $response;
187	>	$response =~ /(.*);(.*);(.*)/;
188	>	if ($response eq "ERROR") {
189	>	print "There are no active configured filters for your host.\n";
190	>	close($sock);
191	>	wait_then_retry();
192	>	next;
193	>	}
194	>	($filter_addr, $udp_port, $tcp_port) = ($1, $2, $3);
195	>	unless (defined($filter_addr) && defined($udp_port) && defined($tcp_port)) {
196	>	print "Failed: Filter address response from server did not make sense: $response\n";
197	>	close($sock);
198	>	wait_then_retry();
199	>	next;
200	>	}
201
202	<	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
202	>	print "Got filter data ($filter_addr, $udp_port, $tcp_port)\n";
203
204	<	print $sock "END\n";
205	<	$response = <$sock>;
206	<	chop $response;
207	<	if ($response eq "OK") {
208	<	print "Host successfully configured via TCP.\n"
209	<	}
210	<	else {
211	<	print "The server failed the host configuration on the END command.";
212	<	exit(1);
213	<	}
204	>	print $sock "END\n";
205	>	$response = <$sock>;
206	>	chop $response;
207	>	if ($response eq "OK") {
208	>	print "Host successfully configured via TCP.\n"
209	>	}
210	>	else {
211	>	print "The server failed the host configuration on the END command.";
212	>	close($sock);
213	>	wait_then_retry();
214	>	next;
215	>	}
216
217	<	close($sock);
217	>	close($sock);
218
219	<	print "Configuration finished sucessfully!\n";
220	<
219	>	print "Configuration finished sucessfully!\n";
220	>	last;
221	>	}
222		return;
223		}
224
#	Line 296 | Line 343 | sub send_tcp_heartbeat() {
343		) or return;
344		if (!defined $sock) {
345		print "IHOST WARNING: Failed to deliver a heartbeat to the i-scream filter.\n";
346	+	&tcp_configure();
347		return;
348		}
349
#	Line 304 | Line 352 | sub send_tcp_heartbeat() {
352
353		print $sock "HEARTBEAT\n";
354		$response = <$sock>;
355	<	chop $response or return;
355	>	return if (!defined $response);
356	>	chop $response;
357		if (!$response eq "OK") {
358		close($sock);
359		print "Server gave wrong response to HEARTBEAT: $response\n";
360	+	&tcp_configure();
361		return;
362		}
363
364		print $sock "CONFIG\n";
365		$response = <$sock>;
366	<	chop $response or return;
366	>	return if (!defined $response);
367	>	chop $response;
368		if (!$response eq "OK") {
369		close($sock);
370		print "Server gave wrong response to CONFIG: $response\n";
371	+	&tcp_configure();
372		return;
373		}
374
375		print $sock "$file_list\n";
376		$response = <$sock>;
377	<	chop $response or return;
377	>	return if (!defined $response);
378	>	chop $response;
379		if (!$response eq "OK") {
380		close($sock);
381		print "Server gave wrong response to file list: $response\n";
382	+	&tcp_configure();
383		return;
384		}
385
386		print $sock "$last_modified\n";
387		$response = <$sock>;
388	<	chop $response or return;
388	>	return if (!defined $response);
389	>	chop $response;
390		if ($response eq "ERROR") {
391		close($sock);
392	+	print "Server configuration changed.  Reconfiguring with filter manager.\n";
393		&tcp_configure();
394		return;
395		}
396		if (!$response eq "OK") {
397		close($sock);
398		print "Server gave wrong response to HEARTBEAT: $response\n";
399	+	&tcp_configure();
400		return;
401		}
402
403		print $sock "ENDHEARTBEAT\n";
404	<	$response = <$sock> or return;
404	>	$response = <$sock>;
405	>	return if (!defined $response);
406		chop $response;
407		if (!$response eq "OK") {
408		close($sock);
409		print "Server gave wrong response to ENDHEARTBEAT: $response\n";
410	+	&tcp_configure();
411		return;
412		}
413
414		close($sock);
415		print "^";
416	+
417	+	return;
418	+	}
419	+
420	+	#-----------------------------------------------------------------------
421	+	# write_pid
422	+	# Writes the PID (process ID) of this instance to $pidfile.
423	+	# This is then used by a seperate script to check (and restart) ihost.
424	+	#-----------------------------------------------------------------------
425	+	sub write_pid() {
426	+	open PID, ">$pidfile";
427	+	print PID $$;
428	+	close PID;
429
430		return;
431		}

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