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