def _routes():
for line in [x.strip() for x in output.split("\n")]:
network, nexthop, pmtu = line.split(" ")
if network == "default":
network = "0.0.0.0/0"
if "/" not in network:
network = network + "/32"
addr, _ = network.split("/")
if is_bogon(addr):
continue
yield {
"network": network,
"nexthop": nexthop,
"pmtu": int(pmtu)
}
def _routes():
for toks in [tokenize(l) for l in splitlines(output)]:
if len(toks) < 3:
continue
network, nexthop = toks[0], toks[2]
if network == "default":
network = "0.0.0.0/0"
if "/" not in network:
network = network + "/32"
addr, _ = network.split("/")
if is_bogon(addr):
continue
yield {
"network": network,
"nexthop": nexthop
}
def okaddr(a):
addr, _ = a.split("/")
return not is_bogon(addr)
def interrogate_snmp(host, version=1, community='public', **kw):
def get(v):
r, = netsnmp.snmpget(v, Version=version, DestHost=host, Community=community)
return r
def walk(v):
return netsnmp.snmpwalk(v, Version=version, DestHost=host, Community=community)
log.info("[%s]: getting system description..." % host)
sysdesc = get('SNMPv2-MIB::sysDescr.0')
if sysdesc is None:
log.warning("[%s] no response" % host)
raise SnmpError("[%s] no response" % host)
sysmib = (
("name", 'SNMPv2-MIB::sysName.0'),
("location", 'SNMPv2-MIB::sysLocation.0'),
("contact", 'SNMPv2-MIB::sysContact.0'),
)
result = dict((k,get(v)) for k,v in sysmib)
result["sysdesc"] = sysdesc
log.info("[%s]: getting interfaces..." % host)
ifaces = {}
indexes = walk('IF-MIB::ifIndex')
for i in range(len(indexes)):
ifindex = indexes[i]
ifmib = (
("name", 'IF-MIB::ifDescr.%s' % ifindex),
("ifindex", 'IF-MIB::ifIndex.%s' % ifindex),
("type", 'IF-MIB::ifType.%s' % ifindex),
("mtu", 'IF-MIB::ifMtu.%s' % ifindex),
("speed", 'IF-MIB::ifSpeed.%s' % ifindex),
("mac", 'IF-MIB::ifPhysAddress.%s' % ifindex),
# 'IF-MIB::ifAdminStatus',
# 'IF-MIB::ifOperStatus',
)
ifdesc = dict((k,get(v)) for k,v in ifmib)
ifdesc['ifindex'] = int(ifdesc['ifindex'])
if ifdesc['mac'] is None:
del ifdesc['mac']
else:
ifdesc['mac'] = unpackmac(ifdesc['mac'])
if ifdesc['mtu'] is None:
del ifdesc['mtu']
else:
ifdesc['mtu'] = int(ifdesc['mtu'])
if ifdesc['speed'] == None:
del ifdesc['speed']
else:
ifdesc['speed'] = int(ifdesc['speed'])
if ifdesc['speed'] == 0:
del ifdesc['speed']
ifaces[ifindex] = ifdesc
result['interfaces'] = ifaces.values()
log.info("[%s]: getting IPv4 addresses..." % host)
addrs = walk('IP-MIB::ipAdEntAddr')
for n in range(len(addrs)):
addr = addrs[n]
if is_bogon(addr):
continue
addrmib = (
'IP-MIB::ipAdEntIfIndex.%s' % addr,
'IP-MIB::ipAdEntAddr.%s' % addr,
'IP-MIB::ipAdEntNetMask.%s' % addr
)
addrdesc = list(get(v) for v in addrmib)
addr = ip.ip_interface("%s/%s" % (addrdesc[1], addrdesc[2]))
iface = ifaces[addrdesc[0]]
iface.setdefault('v4addr', []).append(str(addr))
log.info("[%s]: getting ARP table..." % host)
ifindices = set(walk('IP-MIB::ipNetToMediaIfIndex'))
for i in range(len(ifindices)):
ifindex = ifindices.pop()
ipaddrs = walk('IP-MIB::ipNetToMediaNetAddress.%s' % ifindex)
macaddrs = walk('IP-MIB::ipNetToMediaPhysAddress.%s' % ifindex)
for n in range(len(ipaddrs)):
iface = ifaces[ifindex]
ipaddr = ip.ip_address(ipaddrs[n])
macaddr = unpackmac(macaddrs[n])
neighbours = iface.setdefault("arp", [])
neighbours.append({
"v4addr": str(ipaddr),
"mac": macaddr,
})
log.info("[%s]: getting IPv4 routing table..." % host)
routes = walk(netsnmp.Varbind('IP-MIB::ip.21.1.1'))
for n in range(len(routes)):
net = routes[n]
if is_bogon(net):
continue
rtmib = (
'IP-MIB::ip.21.1.11.%s' % net, # netmask
'IP-MIB::ip.21.1.7.%s' % net, # next hop
)
rtdesc = list(get(v) for v in rtmib)
rtable = result.setdefault("v4routes", [])
network = ip.ip_network("%s/%s" % (net, rtdesc[0]))
nexthop = ip.ip_address(rtdesc[1])
rtable.append({
"network": str(network),
"nexthop": str(nexthop)
})
result["timestamp"] = time.time()
return result
