from pysnmp.entity import engine, config
from pysnmp.carrier.asyncore.dgram import udp
from pysnmp.entity.rfc3413 import ntforg
from pysnmp.proto.api import v2c
import subprocess

#subsprocess.popen(['asterisk', '-rx', 'sip', 'show', 'registry'])
return_val=subprocess.Popen(['asterisk -rx "sip show registry"'],stdout=subprocess.PIPE).communicate()
print return_val

# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()

# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public', transportTag='all-my-managers')

# Specify security settings per SecurityName (SNMPv1 -> 0)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)

# Setup transport endpoint and bind it with security settings yielding
# a target name
config.addTransport(
    snmpEngine,
    udp.domainName,
    udp.UdpSocketTransport().openClientMode()
)
config.addTargetAddr(
    snmpEngine, 'my-nms',
    udp.domainName, ('127.0.0.1', 162),
    'my-creds',
    tagList='all-my-managers'
)

# Specify what kind of notification should be sent (TRAP or INFORM),
# to what targets (chosen by tag) and what filter should apply to
# the set of targets (selected by tag)
config.addNotificationTarget(
    snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'trap'
)

# Allow NOTIFY access to Agent's MIB by this SNMP model (1), securityLevel
# and SecurityName
config.addContext(snmpEngine, '')
config.addVacmUser(snmpEngine, 1, 'my-area', 'noAuthNoPriv', (), (), (1, 3, 6))

# *** SNMP engine configuration is complete by this line ***

# Create Notification Originator App instance.
ntfOrg = ntforg.NotificationOriginator()



#Build and submit notification message to dispatcher
ntfOrg.sendVarBinds(
    snmpEngine,
    # Notification targets
    'my-notification',  # notification targets
    None, '',  # contextEngineId, contextName
    # var-binds
    [
        # managed object '1.3.6.1.2.1.1.1.0' = 'my system'
        (v2c.ObjectIdentifier('1.3.6.1.4.1.36119.1.1.0'),
         v2c.OctetString('my system 1')),
        (v2c.ObjectIdentifier('1.3.6.1.4.1.36119.1.2.0'),
         v2c.OctetString('my system 2')),
    ]
)

print('Notification is scheduled to be sent')

snmpEngine.transportDispatcher.runDispatcher()