def _snmp_map_switch(switch, password, user):
haveqbridge = False
mactobridge = {}
conn = snmp.Session(switch, password, user)
ifnamemap = get_portnamemap(conn)
for vb in conn.walk('1.3.6.1.2.1.17.7.1.2.2.1.2'):
haveqbridge = True
oid, bridgeport = vb
if not bridgeport:
continue
oid = str(oid).rsplit('.', 6)
# if 7, then oid[1] would be vlan id
macaddr = '{0:02x}:{1:02x}:{2:02x}:{3:02x}:{4:02x}:{5:02x}'.format(
*([int(x) for x in oid[-6:]]))
mactobridge[macaddr] = int(bridgeport)
if not haveqbridge:
for vb in conn.walk('1.3.6.1.2.1.17.4.3.1.2'):
oid, bridgeport = vb
if not bridgeport:
continue
oid = str(oid).rsplit('.', 6)
macaddr = '{0:02x}:{1:02x}:{2:02x}:{3:02x}:{4:02x}:{5:02x}'.format(
*([int(x) for x in oid[-6:]]))
mactobridge[macaddr] = int(bridgeport)
vlanstocheck = set([])
try:
#ciscoiftovlanmap = {}
for vb in conn.walk('.1.3.6.1.4.1.9.9.68.1.2.2.1.2'):
vlanstocheck.add(vb[1])
#ciscotrunktovlanmap = {}
for vb in conn.walk('.1.3.6.1.4.1.9.9.46.1.6.1.1.5'):
vlanstocheck.add(vb[1])
except Exception:
# We might have crashed snmp on a non-cisco switch
# in such a case, delay 8 seconds to allow recovery to complete
eventlet.sleep(8)
if not vlanstocheck:
vlanstocheck.add(None)
bridgetoifmap = {}
for vlan in vlanstocheck:
if vlan:
if user:
conn = snmp.Session(switch, password, user,
'vlan-{}'.format(vlan))
else:
if not isinstance(password, str):
password = password.decode('utf8')
conn = snmp.Session(switch, '{}@{}'.format(password, vlan))
for vb in conn.walk('1.3.6.1.2.1.17.1.4.1.2'):
bridgeport, ifidx = vb
bridgeport = int(str(bridgeport).rsplit('.', 1)[1])
try:
bridgetoifmap[bridgeport] = int(ifidx)
except ValueError:
# ifidx might be '', skip in such a case
continue
#OFFLOAD: end of need to offload?
return mactobridge, ifnamemap, bridgetoifmap
def _map_switch_backend(args):
"""Manipulate portions of mac address map relevant to a given switch
"""
# 1.3.6.1.2.1.17.7.1.2.2.1.2 - mactoindex (qbridge - preferred)
# if not, check for cisco and if cisco, build list of all relevant vlans:
# .1.3.6.1.4.1.9.9.46.1.6.1.1.5 - trunk port vlan map (cisco only)
# .1.3.6.1.4.1.9.9.68.1.2.2.1.2 - access port vlan map (cisco only)
# if cisco, vlan community string indexed or snmpv3 contest for:
# 1.3.6.1.2.1.17.4.3.1.2 - mactoindx (bridge - low-end switches and cisco)
# .1.3.6.1.2.1.17.1.4.1.2 - bridge index to if index map
# no vlan index or context for:
# .1.3.6.1.2.1.31.1.1.1.1 - ifName... but some switches don't do it
# .1.3.6.1.2.1.2.2.1.2 - ifDescr, usually useless, but a
# fallback if ifName is empty
#
global _macmap
if len(args) == 3:
switch, password, user = args
if not user:
user = None
else:
switch, password = args
user = None
haveqbridge = False
mactobridge = {}
conn = snmp.Session(switch, password, user)
for vb in conn.walk('1.3.6.1.2.1.17.7.1.2.2.1.2'):
haveqbridge = True
oid, bridgeport = vb
if not bridgeport:
continue
oid = str(oid).rsplit('.', 6) # if 7, then oid[1] would be vlan id
macaddr = '{0:02x}:{1:02x}:{2:02x}:{3:02x}:{4:02x}:{5:02x}'.format(
*([int(x) for x in oid[-6:]]))
mactobridge[macaddr] = int(bridgeport)
if not haveqbridge:
for vb in conn.walk('1.3.6.1.2.1.17.4.3.1.2'):
oid, bridgeport = vb
if not bridgeport:
continue
oid = str(oid).rsplit('.', 6)
macaddr = '{0:02x}:{1:02x}:{2:02x}:{3:02x}:{4:02x}:{5:02x}'.format(
*([int(x) for x in oid[-6:]]))
mactobridge[macaddr] = int(bridgeport)
bridgetoifmap = {}
for vb in conn.walk('1.3.6.1.2.1.17.1.4.1.2'):
bridgeport, ifidx = vb
bridgeport = int(str(bridgeport).rsplit('.', 1)[1])
try:
bridgetoifmap[bridgeport] = int(ifidx)
except ValueError:
# ifidx might be '', skip in such a case
continue
ifnamemap = get_portnamemap(conn)
maccounts = {}
bridgetoifvalid = False
for mac in mactobridge:
try:
ifname = ifnamemap[bridgetoifmap[mactobridge[mac]]]
bridgetoifvalid = True
except KeyError:
continue
if ifname not in maccounts:
maccounts[ifname] = 1
else:
maccounts[ifname] += 1
if not bridgetoifvalid:
bridgetoifmap = {}
# Not a single mac address resolved to an interface index, chances are
# that the switch is broken, and the mactobridge is reporting ifidx
# instead of bridge port index
# try again, skipping the bridgetoifmap lookup
for mac in mactobridge:
try:
ifname = ifnamemap[mactobridge[mac]]
bridgetoifmap[mactobridge[mac]] = mactobridge[mac]
except KeyError:
continue
if ifname not in maccounts:
maccounts[ifname] = 1
else:
maccounts[ifname] += 1
_macsbyswitch[switch] = {}
for mac in mactobridge:
# We want to merge it so that when a mac appears in multiple
# places, it is captured.
try:
ifname = ifnamemap[bridgetoifmap[mactobridge[mac]]]
except KeyError:
continue
if mac in _macmap:
_macmap[mac].append((switch, ifname, maccounts[ifname]))
else:
_macmap[mac] = [(switch, ifname, maccounts[ifname])]
if ifname in _macsbyswitch[switch]:
_macsbyswitch[switch][ifname].append(mac)
else:
_macsbyswitch[switch][ifname] = [mac]
nodename = _nodelookup(switch, ifname)
if nodename is not None:
if mac in _nodesbymac and _nodesbymac[mac][0] != nodename:
# For example, listed on both a real edge port
# and by accident a trunk port
log.log({
'error':
'{0} and {1} described by ambiguous'
' switch topology values'.format(nodename,
_nodesbymac[mac][0])
})
_nodesbymac[mac] = (None, None)
else:
_nodesbymac[mac] = (nodename, maccounts[ifname])
def _list_interfaces(switchname, configmanager):
switchcreds = get_switchcreds(configmanager, (switchname,))
switchcreds = switchcreds[0]
conn = snmp.Session(*switchcreds)
ifnames = netutil.get_portnamemap(conn)
return util.natural_sort(ifnames.values())
