| author | Tero Marttila <terom@paivola.fi> |
| Mon, 09 Mar 2015 23:31:13 +0200 | |
| changeset 738 | 3104fdf7ea26 |
| parent 394 | 7077379fb5a0 |
| permissions | -rw-r--r-- |
| 389 | 1 |
""" |
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Requirements: |
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memoized-property |
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Setup: |
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./opt/bin/build-pysnmp-mib -o usr/mibs/LLDP-MIB.py etc/mibs/LLDP-MIB |
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Run: |
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PYSNMP_MIB_DIRS=usr/mibs/ ./opt/bin/python ... |
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394
7077379fb5a0
pvl.snmp.lldp: docdoc used MIBS
Tero Marttila <terom@paivola.fi>
parents:
389
diff
changeset
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7077379fb5a0
pvl.snmp.lldp: docdoc used MIBS
Tero Marttila <terom@paivola.fi>
parents:
389
diff
changeset
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SNMP: |
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7077379fb5a0
pvl.snmp.lldp: docdoc used MIBS
Tero Marttila <terom@paivola.fi>
parents:
389
diff
changeset
|
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LLDP-MIB::lldpLocalSystemData |
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7077379fb5a0
pvl.snmp.lldp: docdoc used MIBS
Tero Marttila <terom@paivola.fi>
parents:
389
diff
changeset
|
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LLDP-MIB::lldpRemTable |
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""" |
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from pvl.snmp import snmp |
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from pvl.snmp.snmp import pysnmp |
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from memoized_property import memoized_property |
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import logging; log = logging.getLogger('pvl.snmp.lldp')
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def macaddr (value) : |
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""" |
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Excepts a MAC address from an SNMP OctetString. |
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""" |
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return ':'.join('{octet:02x}'.format(octet=c) for c in value.asNumbers())
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class LLDPAgent (snmp.SNMPAgent) : |
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""" |
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Query LLDP info from a remote agent. |
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""" |
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@classmethod |
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def _chassis_id (cls, chassis_id, subtype) : |
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log.debug("%s: %r", subtype, chassis_id)
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# XXX: reference names from LLDP-MIB.py |
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if subtype == 4: |
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return macaddr(chassis_id) |
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else : |
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return chassis_id |
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@classmethod |
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def _port_id (cls, port_id, subtype, desc) : |
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log.debug("%s: %r (%s)", subtype, port_id, desc)
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# XXX: reference names from LLDP-MIB.py |
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if subtype == 5: # interfaceName -> IF-MIB::ifName ? |
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return str(port_id) |
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elif subtype == 3 : # macAddress |
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if desc : |
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# prefer desc in this case |
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return desc |
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else : |
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return macaddr(port_id) |
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elif subtype == 7 : # local |
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return str(port_id) # XXX: integer? |
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else : |
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log.warn("unknown subtype=%d: %r", subtype, port_id)
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return port_id |
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LLDP_LOC_CHASSIS_ID = pysnmp.MibVariable('LLDP-MIB', 'lldpLocChassisId')
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LLDP_LOC_CHASSIS_ID_SUBTYPE = pysnmp.MibVariable('LLDP-MIB', 'lldpLocChassisIdSubtype')
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LLDP_LOC_SYS_NAME = pysnmp.MibVariable('LLDP-MIB', 'lldpLocSysName')
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@memoized_property |
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def local (self) : |
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""" |
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Describe the local system. |
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""" |
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for idx, data in self.table( |
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self.LLDP_LOC_CHASSIS_ID, |
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self.LLDP_LOC_CHASSIS_ID_SUBTYPE, |
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self.LLDP_LOC_SYS_NAME, |
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) : |
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return {
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'chassis': self._chassis_id(data[self.LLDP_LOC_CHASSIS_ID], data[self.LLDP_LOC_CHASSIS_ID_SUBTYPE]), |
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'sys_name': str(data[self.LLDP_LOC_SYS_NAME]), |
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} |
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LLDP_LOC_PORT_DESC = pysnmp.MibVariable('LLDP-MIB', 'lldpLocPortDesc')
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LLDP_LOC_PORT_ID = pysnmp.MibVariable('LLDP-MIB', 'lldpLocPortId')
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LLDP_LOC_PORT_ID_SUBTYPE = pysnmp.MibVariable('LLDP-MIB', 'lldpLocPortIdSubtype')
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@memoized_property |
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def ports (self) : |
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""" |
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Describe the local ports. |
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""" |
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ports = { }
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for idx, data in self.table( |
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self.LLDP_LOC_PORT_DESC, |
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self.LLDP_LOC_PORT_ID, |
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self.LLDP_LOC_PORT_ID_SUBTYPE, |
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) : |
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port, = idx |
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ports[int(port)] = {
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'port_id': int(port), |
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'port': self._port_id(data[self.LLDP_LOC_PORT_ID], data[self.LLDP_LOC_PORT_ID_SUBTYPE], data[self.LLDP_LOC_PORT_DESC]), |
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} |
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return ports |
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def port (self, port) : |
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return self.ports[int(port)] |
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LLDP_REM_CHASSIS_ID = pysnmp.MibVariable('LLDP-MIB', 'lldpRemChassisId')
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LLDP_REM_CHASSIS_ID_SUBTYPE = pysnmp.MibVariable('LLDP-MIB', 'lldpRemChassisIdSubtype')
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LLDP_REM_SYS_NAME = pysnmp.MibVariable('LLDP-MIB', 'lldpRemSysName')
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LLDP_REM_PORT_ID = pysnmp.MibVariable('LLDP-MIB', 'lldpRemPortId')
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LLDP_REM_PORT_ID_SUBTYPE = pysnmp.MibVariable('LLDP-MIB', 'lldpRemPortIdSubtype')
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LLDP_REM_PORT_DESC = pysnmp.MibVariable('LLDP-MIB', 'lldpRemPortDesc')
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def remotes (self) : |
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""" |
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Describe remote systems, indexed by local port. |
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""" |
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for idx, data in self.table( |
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self.LLDP_REM_CHASSIS_ID, |
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self.LLDP_REM_CHASSIS_ID_SUBTYPE, |
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self.LLDP_REM_SYS_NAME, |
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self.LLDP_REM_PORT_ID, |
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self.LLDP_REM_PORT_ID_SUBTYPE, |
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self.LLDP_REM_PORT_DESC, |
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) : |
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time, port, idx = idx |
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yield int(port), {
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'chassis': self._chassis_id(data[self.LLDP_REM_CHASSIS_ID], data[self.LLDP_REM_CHASSIS_ID_SUBTYPE]), |
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'sys_name': str(data[self.LLDP_REM_SYS_NAME]), |
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'port': self._port_id(data[self.LLDP_REM_PORT_ID], data[self.LLDP_REM_PORT_ID_SUBTYPE], data[self.LLDP_REM_PORT_DESC]), |
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} |
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