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| | #! /usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright Red Hat
# Author: David Gibson <david@gibson.dropbear.id.au>
"""
Test A Simple Socket Transport
transfer.py - Helpers for testing data transfers
"""
import contextlib
from ipaddress import IPv4Address, IPv6Address
import time
import exeter
from . import address, nstool, snh
# HACK: how long to wait for the server to be ready and listening (s)
SERVER_READY_DELAY = 0.1 # 1/10th of a second
# socat needs IPv6 addresses in square brackets
def socat_ip(ip):
if isinstance(ip, IPv6Address):
return f'[{ip}]'
if isinstance(ip, IPv4Address):
return f'{ip}'
raise TypeError
def socat_upload(datafile, csnh, ssnh, connect, listen):
srcdata = csnh.output('cat', f'{datafile}')
with ssnh.bg('socat', '-u', f'{listen}', 'STDOUT',
capture=snh.STDOUT) as server:
time.sleep(SERVER_READY_DELAY)
# Can't use csnh.fg() here, because while we wait for the
# client to complete we won't be reading from the output pipe
# of the server, meaning it will freeze once the buffers fill
with csnh.bg('socat', '-u', f'OPEN:{datafile}', f'{connect}') \
as client:
res = server.run()
client.run()
exeter.assert_eq(srcdata, res.stdout)
def socat_download(datafile, csnh, ssnh, connect, listen):
srcdata = ssnh.output('cat', f'{datafile}')
with ssnh.bg('socat', '-u', f'OPEN:{datafile}', f'{listen}'):
time.sleep(SERVER_READY_DELAY)
dstdata = csnh.output('socat', '-u', f'{connect}', 'STDOUT')
exeter.assert_eq(srcdata, dstdata)
def _tcp_socat(connectip, connectport, listenip, listenport, fromip):
v6 = isinstance(connectip, IPv6Address)
if listenport is None:
listenport = connectport
if v6:
connect = f'TCP6:[{connectip}]:{connectport},ipv6only'
listen = f'TCP6-LISTEN:{listenport},ipv6only'
else:
connect = f'TCP4:{connectip}:{connectport}'
listen = f'TCP4-LISTEN:{listenport}'
if listenip is not None:
listen += f',bind={socat_ip(listenip)}'
if fromip is not None:
connect += f',bind={socat_ip(fromip)}'
return (connect, listen)
def tcp_upload(datafile, cs, ss, connectip, connectport,
listenip=None, listenport=None, fromip=None):
connect, listen = _tcp_socat(connectip, connectport, listenip, listenport,
fromip)
socat_upload(datafile, cs, ss, connect, listen)
def tcp_download(datafile, cs, ss, connectip, connectport,
listenip=None, listenport=None, fromip=None):
connect, listen = _tcp_socat(connectip, connectport, listenip, listenport,
fromip)
socat_download(datafile, cs, ss, connect, listen)
def udp_transfer(datafile, cs, ss, connectip, connectport,
listenip=None, listenport=None, fromip=None):
v6 = isinstance(connectip, IPv6Address)
if listenport is None:
listenport = connectport
if v6:
connect = f'UDP6:[{connectip}]:{connectport},ipv6only,shut-null'
listen = f'UDP6-LISTEN:{listenport},ipv6only,null-eof'
else:
connect = f'UDP4:{connectip}:{connectport},shut-null'
listen = f'UDP4-LISTEN:{listenport},null-eof'
if listenip is not None:
listen += f',bind={socat_ip(listenip)}'
if fromip is not None:
connect += f',bind={socat_ip(fromip)}'
socat_upload(datafile, cs, ss, connect, listen)
SMALL_DATA = 'test/small.bin'
BIG_DATA = 'test/big.bin'
UDP_DATA = 'test/medium.bin'
class TransferTestScenario:
def __init__(self, *, client, server, connect_ip, connect_port,
listen_ip=None, listen_port=None, from_ip=None):
self.client = client
self.server = server
if isinstance(connect_ip, IPv4Address):
self.ip = connect_ip
self.listen_ip = listen_ip
self.from_ip = from_ip
elif isinstance(connect_ip, IPv6Address):
self.ip = connect_ip
self.listen_ip = listen_ip
self.from_ip = from_ip
self.port = connect_port
self.listen_port = listen_port
def test_tcp_upload(setup, datafile=SMALL_DATA):
with setup as scn:
tcp_upload(datafile, scn.client, scn.server, scn.ip, scn.port,
listenip=scn.listen_ip, listenport=scn.listen_port,
fromip=scn.from_ip)
def test_tcp_big_upload(setup):
return test_tcp_upload(setup, datafile=BIG_DATA)
def test_tcp_download(setup, datafile=SMALL_DATA):
with setup as scn:
tcp_download(datafile, scn.client, scn.server, scn.ip, scn.port,
listenip=scn.listen_ip, listenport=scn.listen_port,
fromip=scn.from_ip)
def test_tcp_big_download(setup):
return test_tcp_download(setup, datafile=BIG_DATA)
def test_udp_transfer(setup, datafile=UDP_DATA):
with setup as scn:
udp_transfer(datafile, scn.client, scn.server,
scn.ip, scn.port,
listenip=scn.listen_ip, listenport=scn.listen_port,
fromip=scn.from_ip)
TRANSFER_TESTS = [test_tcp_upload, test_tcp_big_upload,
test_tcp_download, test_tcp_big_download,
test_udp_transfer]
def transfer_tests(setup):
for t in TRANSFER_TESTS:
testid = f'{setup.__qualname__}|{t.__qualname__}'
exeter.register_pipe(testid, setup, t)
@contextlib.contextmanager
def local_transfer4():
with nstool.unshare_snh('ns', '-Un') as ns:
ns.ifup('lo')
yield TransferTestScenario(client=ns, server=ns,
connect_ip=address.LOOPBACK4,
connect_port=10000)
transfer_tests(local_transfer4)
@contextlib.contextmanager
def local_transfer6():
with nstool.unshare_snh('ns', '-Un') as ns:
ns.ifup('lo')
yield TransferTestScenario(client=ns, server=ns,
connect_ip=address.LOOPBACK6,
connect_port=10000)
transfer_tests(local_transfer6)
|