forked from librenms/librenms
-
Notifications
You must be signed in to change notification settings - Fork 0
/
snmp-scan.php
executable file
·225 lines (207 loc) · 8.02 KB
/
snmp-scan.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
#!/usr/bin/env php
<?php
/*
* Copyright (C) 2015 Daniel Preussker <[email protected]>
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SNMP Scan
* @author f0o <[email protected]>
* @copyright 2015 f0o, LibreNMS
* @license GPL
* @package LibreNMS
* @subpackage Discovery
*/
use LibreNMS\Exceptions\HostExistsException;
use LibreNMS\Exceptions\HostUnreachableException;
use LibreNMS\Exceptions\HostUnreachablePingException;
chdir(__DIR__); // cwd to the directory containing this script
$ts = microtime(true);
require 'includes/defaults.inc.php';
require 'config.php';
require 'includes/definitions.inc.php';
require 'includes/functions.php';
require 'includes/discovery/functions.inc.php';
if ($config['autodiscovery']['snmpscan'] === false) {
echo 'SNMP-Scan disabled.'.PHP_EOL;
exit(2);
}
function perform_snmp_scan($net, $force_network, $force_broadcast)
{
global $stats, $config, $debug, $vdebug;
echo 'Range: '.$net->network.'/'.$net->bitmask.PHP_EOL;
$config['snmp']['timeout'] = 1;
$config['snmp']['retries'] = 0;
$config['fping_options']['retries'] = 0;
$start = ip2long($net->network);
$end = ip2long($net->broadcast)-1;
if ($force_network === true) { //Force-scan network address
d_echo("Forcing network address scan".PHP_EOL);
$start = $start-1;
}
if ($force_broadcast === true) { //Force-scan broadcast address
d_echo("Forcing broadcast address scan".PHP_EOL);
$end = $end+1;
}
if ($net->bitmask === "31") { //Handle RFC3021 /31 prefixes
$start = ip2long($net->network)-1;
$end = ip2long($net->broadcast);
d_echo("RFC3021 network, hosts ".long2ip($start+1)." and ".long2ip($end).PHP_EOL.PHP_EOL);
} elseif ($net->bitmask === "32") { //Handle single-host /32 prefixes
$start = ip2long($net->network)-1;
$end = $start+1;
d_echo("RFC3021 network, hosts ".long2ip($start+1)." and ".long2ip($end).PHP_EOL.PHP_EOL);
} else {
d_echo("Network: ".($net->network).PHP_EOL);
d_echo("Broadcast: ".($net->broadcast).PHP_EOL.PHP_EOL);
}
while ($start++ < $end) {
$stats['count']++;
$host = long2ip($start);
if ($vdebug) {
echo "Scanning: ".$host.PHP_EOL;
}
if (match_network($config['autodiscovery']['nets-exclude'], $host)) {
if ($vdebug) {
echo "Excluded by config.php".PHP_EOL.PHP_EOL;
} else {
echo '|';
}
continue;
}
$test = isPingable($host);
if ($test['result'] === false) {
if ($vdebug) {
echo "Unpingable Device".PHP_EOL.PHP_EOL;
} else {
echo '.';
}
continue;
}
if (ip_exists($host)) {
$stats['known']++;
if ($vdebug) {
echo "Known Device".PHP_EOL;
} else {
echo '*';
}
continue;
}
foreach (array('udp','tcp') as $transport) {
try {
addHost(gethostbyaddr($host), '', $config['snmp']['port'], $transport, $config['distributed_poller_group']);
$stats['added']++;
if ($vdebug) {
echo "Added Device".PHP_EOL.PHP_EOL;
} else {
echo '+';
}
break;
} catch (HostExistsException $e) {
$stats['known']++;
if ($vdebug) {
echo "Known Device".PHP_EOL.PHP_EOL;
} else {
echo '*';
}
break;
} catch (HostUnreachablePingException $e) {
if ($vdebug) {
echo "Unpingable Device".PHP_EOL.PHP_EOL;
} else {
echo '.';
}
break;
} catch (HostUnreachableException $e) {
if ($debug) {
print_error($e->getMessage() . " over $transport");
foreach ($e->getReasons() as $reason) {
echo " $reason".PHP_EOL;
}
}
if ($transport === 'tcp') {
// tried both udp and tcp without success
$stats['failed']++;
if ($vdebug) {
echo "Failed to Add Device".PHP_EOL.PHP_EOL;
} else {
echo '-';
}
}
}
}
}
echo PHP_EOL;
}
$opts = getopt('r:d::v::n::b::l::h::');
$stats = array('count'=> 0, 'known'=>0, 'added'=>0, 'failed'=>0);
$start = false;
$debug = false;
$quiet = 1;
$net = false;
if (isset($opts['h']) || (empty($opts) && (!isset($config['nets']) || empty($config['nets'])))) {
echo 'Usage: '.$argv[0].' -r <CIDR_Range> [-d] [-l] [-h]'.PHP_EOL;
echo ' -r CIDR_Range CIDR noted IP-Range to scan'.PHP_EOL;
echo ' This argument is only required if $config[\'nets\'] is not set'.PHP_EOL;
echo ' Example: 192.168.0.0/24'.PHP_EOL;
echo ' Example: 192.168.0.0/31 will be treated as an RFC3021 p-t-p network'.PHP_EOL;
echo ' with two addresses, 192.168.0.0 and 192.168.0.1'.PHP_EOL;
echo ' Example: 192.168.0.1/32 will be treated as a single host address'.PHP_EOL;
echo ' -n Force scan of network address'.PHP_EOL;
echo ' -b Force scan of broadcast address'.PHP_EOL;
echo ' -d Enable Debug'.PHP_EOL;
echo ' -v Enable verbose Debug'.PHP_EOL;
echo ' -l Show Legend'.PHP_EOL;
echo ' -h Print this text'.PHP_EOL;
exit(0);
}
if (isset($opts['d']) || isset($opts['v'])) {
if (isset($opts['v'])) {
$vdebug = true;
}
$debug = true;
}
if (isset($opts['l'])) {
echo ' * = Known Device; . = Unpingable Device; + = Added Device; - = Failed To Add Device; | = Excluded by config.php'.PHP_EOL;
}
if (isset($opts['n'])) {
$force_network = true;
}
if (isset($opts['b'])) {
$force_broadcast = true;
}
if (isset($opts['r'])) {
$net = Net_IPv4::parseAddress($opts['r']);
if (ip2long($net->network) !== false) {
perform_snmp_scan($net, $force_network, $force_broadcast);
echo 'Scanned '.$stats['count'].' IPs, Already known '.$stats['known'].' Devices, Added '.$stats['added'].' Devices, Failed to add '.$stats['failed'].' Devices.'.PHP_EOL;
echo 'Runtime: '.(microtime(true)-$ts).' secs'.PHP_EOL;
} else {
echo 'Could not interpret supplied CIDR noted IP-Range: '.$opts['r'].PHP_EOL;
exit(2);
}
} elseif (isset($config['nets']) && !empty($config['nets'])) {
if (!is_array($config['nets'])) {
$config['nets'] = array( $config['nets'] );
}
foreach ($config['nets'] as $subnet) {
$net = Net_IPv4::parseAddress($subnet);
perform_snmp_scan($net, $force_network, $force_broadcast);
}
echo 'Scanned '.$stats['count'].' IPs, Already know '.$stats['known'].' Devices, Added '.$stats['added'].' Devices, Failed to add '.$stats['failed'].' Devices.'.PHP_EOL;
echo 'Runtime: '.(microtime(true)-$ts).' secs'.PHP_EOL;
} else {
echo 'Please either add a range argument with \'-r <CIDR_RANGE>\' or define $config[\'nets\'] in your config.php'.PHP_EOL;
exit(2);
}