/usr/share/snmpsim/variation/sql.py is in snmpsim 0.2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# SNMP Simulator, http://snmpsim.sourceforge.net
#
# Managed value variation module: simulate a writable Agent using
# SQL backend for storing Managed Objects
#
# Module initialization parameters are dbtype:<dbms>,dboptions:<options>
#
# Expects to work a table of the following layout:
# CREATE TABLE <tablename> (oid text, tag text, value text, maxaccess text)
#
from snmpsim.grammar.snmprec import SnmprecGrammar
from snmpsim import error
dbConn = None
dbTable = 'snmprec'
def init(**context):
global dbConn, dbTable
options = {}
if context['options']:
options.update(
dict([x.split(':') for x in context['options'].split(',')])
)
if 'dbtype' not in options:
raise error.SnmpsimError('database type not specified')
db = __import__(
options['dbtype'],
fromlist=options['dbtype'].split('.')[:-1]
)
if 'dboptions' in options: # legacy
connectParams = { 'database': options['dboptions'] }
else:
connectParams = dict(
[ (k,options[k]) for k in options if k in ('host', 'port', 'user', 'passwd', 'password', 'db', 'database', 'unix_socket', 'named_pipe') ]
)
for k in 'port', 'connect_timeout':
if k in connectParams:
connectParams[k] = int(connectParams[k])
if not connectParams:
raise error.SnmpsimError('database connect parameters not specified')
dbConn = db.connect(**connectParams)
if 'dbtable' in options:
dbTable = options['dbtable']
if 'mode' in context and context['mode'] == 'recording':
cursor = dbConn.cursor()
try:
cursor.execute('select * from %s limit 1' % dbTable)
except:
cursor.execute('CREATE TABLE %s (oid text, tag text, value text, maxaccess text)' % dbTable)
else:
cursor.fetchall()
cursor.close()
def variate(oid, tag, value, **context):
if dbConn is None:
raise error.SnmpsimError('variation module not initialized')
cursor = dbConn.cursor()
dbTable, = value.split(',')
origOid = context['origOid']
sqlOid = '.'.join(['%10s' % x for x in str(origOid).split('.')])
if context['setFlag']:
if 'hexvalue' in context:
textTag = context['hextag']
textValue = context['hexvalue']
else:
textTag = SnmprecGrammar().getTagByType(context['origValue'])
textValue = str(context['origValue'])
cursor.execute(
'select maxaccess,tag from %s where oid="%s"' % (dbTable, sqlOid)
)
resultset = cursor.fetchone()
if resultset:
maxaccess = resultset[0]
if maxaccess != 'read-write':
return origOid, tag, context['errorStatus']
cursor.execute(
'update %s set tag="%s",value="%s" where oid="%s"' % (dbTable, textTag, textValue, sqlOid)
)
else:
cursor.execute(
'insert into %s values ("%s", "%s", "%s", "read-write")' % (dbTable, sqlOid, textTag, textValue)
)
if context['varsRemaining'] == 0: # last OID in PDU
dbConn.commit()
cursor.close()
return origOid, textTag, context['origValue']
else:
if context['nextFlag']:
cursor.execute('select oid from %s where oid>"%s" order by oid limit 1' % (dbTable, sqlOid))
resultset = cursor.fetchone()
if resultset:
origOid = origOid.clone(
'.'.join([x.strip() for x in str(resultset[0]).split('.')])
)
sqlOid = '.'.join(['%10s' % x for x in str(origOid).split('.')])
else:
cursor.close()
return origOid, tag, context['errorStatus']
cursor.execute('select tag, value from %s where oid="%s"' % (dbTable, sqlOid))
resultset = cursor.fetchone()
cursor.close()
if resultset:
return origOid, str(resultset[0]), str(resultset[1])
else:
return origOid, tag, context['errorStatus']
def record(oid, tag, value, **context):
if dbConn is None:
raise error.SnmpsimError('variation module not initialized')
if context['stopFlag']:
raise error.NoDataNotification()
sqlOid = '.'.join(['%10s' % x for x in oid.split('.')])
if 'hexvalue' in context:
textTag = context['hextag']
textValue = context['hexvalue']
else:
textTag = SnmprecGrammar().getTagByType(context['origValue'])
textValue = str(context['origValue'])
cursor = dbConn.cursor()
cursor.execute(
'select oid from %s where oid="%s" limit 1' % (dbTable, sqlOid)
)
if cursor.fetchone():
cursor.execute(
'update %s set tag="%s",value="%s" where oid="%s"' % (dbTable, textTag, textValue, sqlOid)
)
else:
cursor.execute(
'insert into %s values ("%s", "%s", "%s", "read-write")' % (dbTable, sqlOid, textTag, textValue)
)
cursor.close()
if not context['count']:
return str(context['startOID']), ':sql', dbTable
else:
raise error.NoDataNotification()
def shutdown(**context):
if dbConn is not None:
if 'mode' in context and context['mode'] == 'recording':
dbConn.commit()
dbConn.close()
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