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mib_compiler.php
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<?php
/**
* phpsnmp - a PHP SNMP library
*
* Copyright (C) 2004 David Eder <david@eder,us>
*
* Based on snmp - a Python SNMP library
* Copyright (C) 2003 Unicity Pty Ltd <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @author David Eder <[email protected]>
* @copyright 2004 David Eder
* @package phpSNMP
* @subpackage mib_compiler
* @version .7
*/
/**
*/
set_time_limit(0);
ini_set('memory_limit', '256M');
error_reporting(E_ALL);
$mc = new mib_compiler();
$mc->add_mibs('/usr/share/snmp/mibs');
$mc->compile();
/**
* Asn1Objects
*
* Base class for all Asn1Objects. This is only intended to support a specific subset of ASN1 stuff as
* defined by the RFCs to keep things as simple as possible.
*
* @package phpSNMP
* @subpackage mib_compiler
*/
class mib_compiler
{
var $parsed = array();
var $outfile = 'oid_format.data';
/**
* Constructor
*/
public function __construct()
{
}
/**
* Add mibs
*
* @param string $path
*/
public function add_mibs($path)
{
foreach(glob("$path/*") as $mib)
{
if(is_dir($mib))
$this->add_mibs($mib);
else
$this->add_mib($mib);
}
}
/**
* Add a mib
*
* @param string $filename
*/
public function add_mib($filename)
{
echo "Loading $filename\n";
$this->parse(file_get_contents($filename));
}
/**
* Compile mibs
*/
public function compile()
{
echo 'Found ' . count($this->parsed) . " objects\n";
echo "Building node list\n";
$nodes[''] = array(1=>'iso');
$found['iso'] = 1;
$found[''] = 1;
foreach($this->parsed as $obj)
{
if(isset($obj['VALUE'][0]) && !is_numeric($obj['VALUE'][0]))
{
if(isset($obj['VALUE'][1]) && is_numeric($obj['VALUE'][1]))
{
$nodes[$obj['VALUE'][0]][$obj['VALUE'][1]] = $obj['NAME'];
$found[$obj['NAME']] = 1;
}
}
}
echo "Trimming disconnected nodes\n";
foreach(array_keys($nodes) as $key)
{
if(!isset($found[$key]))
{
echo "deleting $key\n";
unset($nodes[$key]);
}
}
echo "Writing {$this->outfile}\n";
$fp = fopen($this->outfile, 'w');
fputs($fp, serialize($nodes));
fclose($fp);
}
// // // // // // // // //
// NOTHING PUBLIC BELOW //
// // // // // // // // //
/**
* Parse a MIB file
*
* @param string $mibtext
* @param boolean $full
*/
public function parse($mibtext, $full=false)
{
$tokens = $this->get_tokens($mibtext);
$cnt = count($tokens);
echo "Found $cnt tokens\n";
$rec = array();
for($index = 0; $index < $cnt; $index++)
{
echo number_format(100 *$index / $cnt, 2) . "% \r";
if($tokens[$index] == 'OBJECT-IDENTITY' || $tokens[$index] == 'OBJECT-TYPE' || $tokens[$index] == 'MODULE-IDENTITY')
{
if($tokens[$index-1] != ',' && $tokens[$index+1] != 'FROM' && $tokens[$index+1] != 'MACRO')
{
if(isset($rec['NAME']) && isset($rec['VALUE'])) $this->parsed[] = $rec;
$rec = array('NAME'=>$tokens[$index-1]);
}
}
elseif($tokens[$index] == 'OBJECT')
{
if($tokens[$index+1] == 'IDENTIFIER' && $tokens[$index-1] != '(' && $tokens[$index-1] != '::=' && $tokens[$index-1] != 'SYNTAX' && $tokens[$index-2] != '(')
{
if(isset($rec['NAME']) && isset($rec['VALUE'])) $this->parsed[] = $rec;
$rec = array('NAME'=>$tokens[$index-1]);
}
}
elseif($tokens[$index] == '{')
$this->parse_bracket_token($tokens, $index, '{', '}');
elseif(isset($rec['NAME']))
{
if($tokens[$index] == '::=')
{
$rec['VALUE'] = $this->parse_simple_token($tokens, $index);
$this->parsed[] = $rec;
$rec = array();
}
elseif($full)
{
if($tokens[$index] == 'ACCESS')
$rec['ACCESS'] = $this->parse_simple_token($tokens, $index, array('read-only', 'not-accessible', 'read-write'));
elseif($tokens[$index] == 'DEFVAL')
$rec['DEFVAL'] = $this->parse_simple_token($tokens, $index);
elseif($tokens[$index] == 'DESCRIPTION')
$rec['DESCRIPTION'] = $tokens[++$index];
elseif($tokens[$index] == 'INDEX')
$rec['INDEX'] = $this->parse_simple_token($tokens, $index);
elseif($tokens[$index] == 'MAX-ACCESS')
$rec['MAX-ACCESS'] = $this->parse_simple_token($tokens, $index, array('read-only', 'not-accessible', 'read-write', 'read-create', 'accessible-for-notify'));
elseif($tokens[$index] == 'REFERENCE')
$rec['REFERENCE'] = $this->parse_simple_token($tokens, $index);
elseif($tokens[$index] == 'STATUS')
$rec['STATUS'] = $this->parse_simple_token($tokens, $index, array('current', 'deprecated', 'obsolete', 'mandatory'));
elseif($tokens[$index] == 'SYNTAX')
$rec['SYNTAX'] = $this->parse_SYNTAX_token($tokens, $index);
elseif($tokens[$index] == 'UNITS')
$rec['UNITS'] = $this->parse_simple_token($tokens, $index);
}
}
}
echo number_format(100, 2) . "% \r";
if(isset($rec['NAME']) && isset($rec['VALUE'])) $this->parsed[] = $rec;
}
/**
* Get Tokens
*
* @param string $text
* @return array
*/
public function get_tokens($text)
{
$in_quote = false;
$in_comment = false;
$token = '';
$tokens = array();
$length = strlen($text);
for($i = 0; $i < $length; $i++)
{
if($in_quote)
{
if($text{$i} == '"')
{
$in_quote = false;
if($token != '')
{
$tokens[] = $token;
$token = '';
}
}
else
$token .= $text{$i};
}
elseif($in_comment)
{
if($text{$i} == "\n" || $text{$i} == "\r")
$in_comment = false;
}
else
{
switch($text{$i})
{
case ':':
if($text{$i+1} == ':' && $text{$i+2} == '=')
{
if($token != '')
{
$tokens[] = $token;
$token = '';
}
$tokens[] = '::=';
$i += 2;
}
else
$token .= $text{$i};
break;
case '.':
if($text{$i+1} == '.')
{
if($token != '')
{
$tokens[] = $token;
$token = '';
}
$tokens[] = '..';
$i++;
}
else
$token .= $text{$i};
break;
case ',':
case ';':
case '{':
case '}':
case '(':
case ')':
case '|':
if($token != '')
{
$tokens[] = $token;
$token = '';
}
$tokens[] = $text{$i};
break;
case ' ':
case "\t":
case "\n":
case "\r":
if($token != '')
{
$tokens[] = $token;
$token = '';
}
break;
case '-':
if($text{$i+1} == '-')
$in_comment = true;
else
$token .= $text{$i};
break;
case '"';
$in_quote = true;
break;
default:
$token .= $text{$i};
}
}
}
if($token != '')
$tokens[] = $token;
return $tokens;
}
/**
* Parse simple token
*
* @param array $tokens
* @param integer $index
* @param array $allowed
* @return array
*/
public function parse_simple_token($tokens, &$index, $allowed=NULL)
{
if(is_array($allowed))
{
if(in_array(strtolower($tokens[$index+1]), $allowed))
return $tokens[++$index];
}
elseif(is_null($allowed))
{
if($tokens[$index+1] == '{')
return $this->parse_bracket_token($tokens, ++$index, '{', '}');
else
return $tokens[++$index];
}
trigger_error("unknown token {$tokens[$index]} {$tokens[$index+1]}", E_USER_ERROR);
return $tokens[++$index];
}
/**
* Parse SYNTAX token
*
* @param array $tokens
* @param integer $index
* @return array
*/
public function parse_SYNTAX_token($tokens, &$index)
{
$ret = NULL;
switch($tokens[$index+1])
{
case 'SEQUENCE':
if($tokens[$index+2] == 'OF')
{
$index += 2;
if($tokens[$index+1] == '{')
$ret = array('SEQUENCE OF'=>$this->parse_bracket_token($tokens, ++$index, '{', '}'));
else
$ret = array('SEQUENCE OF'=>$tokens[++$index]);
}
break;
case 'OCTET':
if($tokens[$index+2] == 'STRING')
{
$index += 2;
if($tokens[$index+1] == '{')
$ret = array('OCTET STRING'=>$this->parse_bracket_token($tokens, ++$index, '{', '}'));
elseif($tokens[$index+1] == '(')
$ret = array('OCTET STRING'=>$this->parse_bracket_token($tokens, ++$index, '(', ')'));
else
$ret = 'OCTET STRING';
}
break;
case 'OBJECT':
if($tokens[$index+2] == 'IDENTIFIER')
$ret = $tokens[++$index] . ' ' . $tokens[++$index];
else
trigger_error("unknown token {$tokens[$index+1]} {$tokens[$index+2]}", E_USER_ERROR);
break;
case 'INTEGER':
case 'Counter':
case 'Counter32':
case 'Counter64':
case 'Integer32':
case 'Gauge':
case 'Gauge32':
case 'TimeStamp':
case 'TimeTicks':
case 'PhysAddress':
case 'IpAddress':
case 'DateAndTime':
case 'TimeInterval':
case 'Unsigned32':
case 'DisplayString':
$ret = $tokens[++$index];
if($tokens[$index+1] == '{')
$ret = array($ret=>$this->parse_bracket_token($tokens, ++$index, '{', '}'));
elseif($tokens[$index+1] == '(')
$ret = array($ret=>$this->parse_bracket_token($tokens, ++$index, '(', ')'));
break;
default:
$ret = $tokens[++$index];
if($tokens[$index+1] == '{')
$ret = array($ret=>$this->parse_bracket_token($tokens, ++$index, '{', '}'));
elseif($tokens[$index+1] == '(')
$ret = array($ret=>$this->parse_bracket_token($tokens, ++$index, '(', ')'));
break;
}
return $ret;
}
/**
* Parse bracket token
*
* @param array $tokens
* @param integer $index
* @param integer $start
* @param integer $end
* @return array
*/
public function parse_bracket_token($tokens, &$index, $start, $end)
{
$begin = $index + 1;
while($index + 1 < count($tokens) && $tokens[$index] != $end)
{
$index++;
if($tokens[$index] == $start)
{
$this->parse_bracket_token($tokens, $index, $start, $end);
$index++;
}
}
return array_slice($tokens, $begin, $index - $begin);
}
}
?>