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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 dataclasses
import ipaddress
import time
from typing import Iterator, Optional
import exeter
from . import cmdsite, ip, unshare
# 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: ip.Addr) -> str:
if isinstance(ip, ipaddress.IPv6Address):
return f'[{ip}]'
elif isinstance(ip, ipaddress.IPv4Address):
return f'{ip}'
raise TypeError
def socat_upload(datafile: str, csite: cmdsite.CmdSite,
ssite: cmdsite.CmdSite, connect: str, listen: str) -> None:
srcdata = csite.output('cat', f'{datafile}')
with ssite.bg('socat', '-u', f'{listen}', 'STDOUT',
capture=cmdsite.Capture.STDOUT) as server:
time.sleep(SERVER_READY_DELAY)
# Can't use csite.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 csite.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: str, csite: cmdsite.CmdSite,
ssite: cmdsite.CmdSite,
connect: str, listen: str) -> None:
srcdata = ssite.output('cat', f'{datafile}')
with ssite.bg('socat', '-u', f'OPEN:{datafile}', f'{listen}'):
time.sleep(SERVER_READY_DELAY)
dstdata = csite.output('socat', '-u', f'{connect}', 'STDOUT')
exeter.assert_eq(srcdata, dstdata)
def _tcp_socat(connectip: ip.Addr, connectport: int,
listenip: Optional[ip.Addr], listenport: Optional[int],
fromip: Optional[ip.Addr]) -> tuple[str, str]:
v6 = isinstance(connectip, ipaddress.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: str, cs: cmdsite.CmdSite, ss: cmdsite.CmdSite,
connectip: ip.Addr, connectport: int,
listenip: Optional[ip.Addr] = None,
listenport: Optional[int] = None,
fromip: Optional[ip.Addr] = None) -> None:
connect, listen = _tcp_socat(connectip, connectport, listenip, listenport,
fromip)
socat_upload(datafile, cs, ss, connect, listen)
def tcp_download(datafile: str, cs: cmdsite.CmdSite, ss: cmdsite.CmdSite,
connectip: ip.Addr, connectport: int,
listenip: Optional[ip.Addr] = None,
listenport: Optional[int] = None,
fromip: Optional[ip.Addr] = None) -> None:
connect, listen = _tcp_socat(connectip, connectport, listenip, listenport,
fromip)
socat_download(datafile, cs, ss, connect, listen)
def udp_transfer(datafile: str, cs: cmdsite.CmdSite, ss: cmdsite.CmdSite,
connectip: ip.Addr, connectport: int,
listenip: Optional[ip.Addr] = None,
listenport: Optional[int] = None,
fromip: Optional[ip.Addr] = None) -> None:
v6 = isinstance(connectip, ipaddress.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 = 'small.bin'
BIG_DATA = 'big.bin'
UDP_DATA = 'medium.bin'
@dataclasses.dataclass
class TransferScenario(exeter.Scenario):
client: cmdsite.CmdSite
server: cmdsite.CmdSite
connect_ip: ip.Addr
connect_port: int
listen_ip: Optional[ip.Addr] = None
from_ip: Optional[ip.Addr] = None
listen_port: Optional[int] = None
def tcp_upload(self, datafile: str) -> None:
tcp_upload(datafile, self.client, self.server,
self.connect_ip, self.connect_port,
listenip=self.listen_ip, listenport=self.listen_port,
fromip=self.from_ip)
@exeter.scenariotest
def tcp_small_upload(self) -> None:
self.tcp_upload(SMALL_DATA)
@exeter.scenariotest
def tcp_big_upload(self) -> None:
self.tcp_upload(BIG_DATA)
def tcp_download(self, datafile: str) -> None:
tcp_download(datafile, self.client, self.server,
self.connect_ip, self.connect_port,
listenip=self.listen_ip, listenport=self.listen_port,
fromip=self.from_ip)
@exeter.scenariotest
def tcp_small_download(self) -> None:
self.tcp_download(SMALL_DATA)
@exeter.scenariotest
def tcp_big_download(self) -> None:
self.tcp_download(BIG_DATA)
@exeter.scenariotest
def udp_transfer(self, datafile: str = UDP_DATA) -> None:
udp_transfer(datafile, self.client, self.server,
self.connect_ip, self.connect_port,
listenip=self.listen_ip, listenport=self.listen_port,
fromip=self.from_ip)
def local4() -> Iterator[TransferScenario]:
with unshare.unshare('ns', '-Un') as ns:
ip.ifup(ns, 'lo')
yield TransferScenario(client=ns, server=ns,
connect_ip=ip.LOOPBACK4,
connect_port=10000)
def local6() -> Iterator[TransferScenario]:
with unshare.unshare('ns', '-Un') as ns:
ip.ifup(ns, 'lo')
yield TransferScenario(client=ns, server=ns,
connect_ip=ip.LOOPBACK6,
connect_port=10000)
def selftests() -> None:
TransferScenario.test(local4)
TransferScenario.test(local6)
|