"""
Fetch scalar and table variables
++++++++++++++++++++++++++++++++

Send a series of SNMP GETBULK requests using the following options:

* with SNMPv3 with user 'usr-md5-des', MD5 auth and DES privacy protocols
* over IPv6/UDP
* to an Agent at [::1]:161
* with values non-repeaters = 1, max-repetitions = 25
* for IP-MIB::ipAdEntAddr and all columns of the IF-MIB::ifEntry table
* stop when response OIDs leave the scopes of the table

Functionally similar to:

| $ snmpbulkwalk -v3 -lauthPriv -u usr-md5-des -A authkey1 -X privkey1 -Cn1, -Cr25 demo.snmplabs.com IP-MIB::ipAdEntAddr IP-MIB::ipAddrEntry

"""#
from pysnmp.hlapi import *

iterator = bulkCmd(
    SnmpEngine(),
    UsmUserData('usr-md5-des', 'authkey1', 'privkey1'),
    Udp6TransportTarget(('::1', 161)),
    ContextData(),
    1, 25,
    ObjectType(ObjectIdentity('IP-MIB', 'ipAdEntAddr')),
    ObjectType(ObjectIdentity('IP-MIB', 'ipAddrEntry')),
    lexicographicMode=False
)

for errorIndication, errorStatus, errorIndex, varBinds in iterator:

    if errorIndication:
        print(errorIndication)
        break

    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
        break

    else:
        for varBind in varBinds:
            print(' = '.join([x.prettyPrint() for x in varBind]))