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import re
import xml.etree.ElementTree
from haircontrol.data import *
class Discovery:
IPNEIGH = re.compile("(?P<ip>[a-f0-9:.]+) dev (?P<ifname>.*) lladdr (?P<mac>[a-f0-9:]*)")
IPLINKSHOW = re.compile("(?P<id>\d+):\s+(?P<ifname>[^:]*):.+\s+(?:link/ether\s+(?P<mac>[a-f0-9:]*)\s+brd|link/none)")
def __init__(self, inspector):
self.inspector = inspector
self.net = EtherDomain()
def discover_hinting_from_lldp(self, e_lldp):
self.net.add_equipment(e_lldp)
self.inspector.connect(e_lldp)
# Learn local interfaces of e_lldp
fd = self.inspector.command('ip-link')
for line in fd:
matches = Discovery.IPLINKSHOW.match(line)
if matches:
ifname, mac = [ matches.group(k) for k in ['ifname','mac'] ]
e_lldp.ifaces[ifname] = Interface(ifname, mac)
fd.close()
# Create equipments and ifaces from LLDP neighbour discovery
fd = self.inspector.command('lldp')
root = xml.etree.ElementTree.parse(fd).getroot()
for iface in root.iter('interface'):
local_ifname = iface.get('name')
local_mac = e_lldp.ifaces[local_ifname].mac
chassis = iface.find('chassis')
remote_name = chassis.find('name').text
remote_ipmgmt = chassis.find('mgmt-ip').text
e = Equipment(remote_name, remote_ipmgmt)
self.net.add_equipment(e)
for port in iface.findall('port'):
remote_ifname = port.find('id').text
e.add_seen_mac(remote_ifname, local_mac)
fd.close()
self.inspector.disconnect()
def discover_from_root(self, e_root):
self.net.add_equipment(e_root)
self.inspector.connect(e_root)
fd = self.inspector.command('ip-neigh')
for line in fd:
matches = Discovery.IPNEIGH.match(line)
if matches:
ip, ifname, mac = [ matches.group(k) for k in ['ip','ifname','mac'] ]
self.net.index_mac_ip(mac, ip)
e_root.add_seen_mac(ifname, mac)
fd.close()
self.inspector.disconnect()
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