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# Copyright 2017 Ettus Research (National Instruments)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""
N310 implementation module
"""
import itertools
import socket
from pyroute2 import IPRoute
from ..mpmlog import get_logger
def get_iface_addrs(mac_addr):
"""
return ipv4 addresses for a given macaddress
input format: "aa:bb:cc:dd:ee:ff"
"""
ip2 = IPRoute()
# returns index
[link] = ip2.link_lookup(address=mac_addr)
# Only get v4 addresses
addresses = [addr.get_attrs('IFA_ADDRESS')
for addr in ip2.get_addr(family=socket.AF_INET)
if addr.get('index', None) == link]
# flatten possibly nested list
addresses = list(itertools.chain.from_iterable(addresses))
return addresses
def byte_to_mac(byte_str):
"""
converts a bytestring into nice hex representation
"""
return ':'.join(["%02x" % ord(x) for x in byte_str])
def get_mac_addr(remote_addr):
"""
return MAC address of a remote host already discovered
or None if no host entry was found
"""
ip2 = IPRoute()
addrs = ip2.get_neighbours(dst=remote_addr)
if len(addrs) > 1:
get_logger('get_mac_addr').warning("More than one device with the same IP address found. Picking entry at random")
if not addrs:
return None
return addrs[0].get_attr('NDA_LLADDR')
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