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import resource
import socket
import pytest
from pyroute2.netlink.nlsocket import NetlinkSocket
def test_ports_auto():
# create two sockets
s1 = NetlinkSocket()
s2 = NetlinkSocket()
# both bind() should succeed
s1.bind()
s2.bind()
# check that ports are different
assert s1.port != s2.port
s1.close()
s2.close()
def test_ports_fail():
s1 = NetlinkSocket(port=0x10)
s2 = NetlinkSocket(port=0x10)
# check if ports are set
assert s1.port == s2.port
# bind the first socket, must succeed
s1.bind()
# bind the second, must fail
exception = None
with pytest.raises(socket.error) as exception:
s2.bind()
# socket.error / OSError(98, 'Address already in use')
assert exception.value.errno == 98
s1.close()
s2.close()
def test_no_free_ports():
soft, hard = resource.getrlimit(resource.RLIMIT_NOFILE)
try:
resource.setrlimit(resource.RLIMIT_NOFILE, (4096, 4096))
except ValueError:
pytest.skip('cannot set RLIMIT_NOFILE')
# create and bind 1024 sockets
ports = [NetlinkSocket() for x in range(1024)]
for port in ports:
port.bind()
# create an extra socket
fail = NetlinkSocket()
# bind must fail with KeyError: no free ports available
with pytest.raises(KeyError):
fail.bind()
# cleanup
for port in ports:
port.close()
fail.close()
resource.setrlimit(resource.RLIMIT_NOFILE, (soft, hard))
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