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Python Netlink library

Project description

Pyroute2 is a pure Python netlink library. It requires only Python stdlib, no 3rd party libraries. The library was started as an RTNL protocol implementation, so the name is pyroute2, but now it supports many netlink protocols. Some supported netlink families and protocols:

  • rtnl, network settings — addresses, routes, traffic controls
  • nfnetlink — netfilter API: ipset, nftables, …
  • ipq — simplest userspace packet filtering, iptables QUEUE target
  • devlink — manage and monitor devlink-enabled hardware
  • generic — generic netlink families
    • nl80211 — wireless functions API (basic support)
    • taskstats — extended process statistics
    • acpi_events — ACPI events monitoring
    • thermal_events — thermal events monitoring
    • VFS_DQUOT — disk quota events monitoring

the simplest usecase

The socket objects, provided by the library, are actual socket objects with a little bit extended API. The additional functionality aims to:

  • Help to open/bind netlink sockets
  • Discover generic netlink protocols and multicast groups
  • Construct, encode and decode netlink messages

Maybe the simplest usecase is to monitor events. Disk quota events:

from pyroute2 import DQuotSocket
# DQuotSocket automatically performs discovery and binding,
# since it has no other functionality beside of the monitoring
with DQuotSocket() as ds:
    for message in ds.get():
        print(message)

Or IPRoute:

from pyroute2 import IPRoute
with IPRoute() as ipr:
    # With IPRoute objects you have to call bind() manually
    ipr.bind()
    for message in ipr.get():
        print(message)

network namespace samples

Network namespace manipulation:

from pyroute2 import netns
# create netns
netns.create('test')
# list
print(netns.listnetns())
# remove netns
netns.remove('test')

Create veth interfaces pair and move to netns:

from pyroute2 import IPDB

ip = IPDB()
# create interface pair
ip.create(ifname='v0p0', kind='veth', peer='v0p1').commit()
# move peer to netns
with ip.interfaces.v0p1 as veth:
    veth.net_ns_fd = 'test'
# don't forget to release before exit
ip.release()

List interfaces in some netns:

from pyroute2 import NetNS
from pprint import pprint

ns = NetNS('test')
pprint(ns.get_links())
ns.close()

More details and samples see in the documentation.

installation

make install or pip install pyroute2

requires

Python >= 2.7

The pyroute2 testing framework requires flake8, coverage, nosetests.

Project details


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