GETNEXT command¶
-
pysnmp.hlapi.asyncio.
nextCmd
(snmpEngine, authData, transportTarget, contextData, *varBinds, **options)¶ Creates a generator to perform SNMP GETNEXT query.
When iterator gets advanced by
asyncio
main loop, SNMP GETNEXT request is send (RFC 1905#section-4.2.2). The iterator yieldsasyncio.Future
which gets done whenever response arrives or error occurs.- Parameters
snmpEngine (
SnmpEngine
) – Class instance representing SNMP engine.authData (
CommunityData
orUsmUserData
) – Class instance representing SNMP credentials.transportTarget (
UdpTransportTarget
orUdp6TransportTarget
) – Class instance representing transport type along with SNMP peer address.contextData (
ContextData
) – Class instance representing SNMP ContextEngineId and ContextName values.*varBinds (
ObjectType
) – One or more class instances representing MIB variables to place into SNMP request.
- Other Parameters
**options –
Request options:
lookupMib - load MIB and resolve response MIB variables at the cost of slightly reduced performance. Default is True.
- Yields
errorIndication (str) – True value indicates SNMP engine error.
errorStatus (str) – True value indicates SNMP PDU error.
errorIndex (int) – Non-zero value refers to varBinds[errorIndex-1]
varBinds (tuple) – A sequence of sequences (e.g. 2-D array) of
ObjectType
class instances representing a table of MIB variables returned in SNMP response. Inner sequences represent table rows and ordered exactly the same as varBinds in request. Response to GETNEXT always contain a single row.
- Raises
PySnmpError – Or its derivative indicating that an error occurred while performing SNMP operation.
Examples
>>> import asyncio >>> from pysnmp.hlapi.asyncio import * >>> >>> @asyncio.coroutine ... def run(): ... errorIndication, errorStatus, errorIndex, varBinds = yield from nextCmd( ... SnmpEngine(), ... CommunityData('public'), ... UdpTransportTarget(('demo.snmplabs.com', 161)), ... ContextData(), ... ObjectType(ObjectIdentity('SNMPv2-MIB', 'system')) ... ) ... print(errorIndication, errorStatus, errorIndex, varBinds) >>> >>> asyncio.get_event_loop().run_until_complete(run()) (None, 0, 0, [[ObjectType(ObjectIdentity('1.3.6.1.2.1.1.1.0'), DisplayString('Linux i386'))]]) >>>