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# SPDX-License-Identifier: GPL-2.0
import os
from pathlib import Path
from lib.py import KsftSkipEx
from lib.py import cmd, ip
from lib.py import NetNS, NetdevSimDev
from .remote import Remote
def _load_env_file(src_path):
env = os.environ.copy()
src_dir = Path(src_path).parent.resolve()
if not (src_dir / "net.config").exists():
return env
with open((src_dir / "net.config").as_posix(), 'r') as fp:
for line in fp.readlines():
full_file = line
# Strip comments
pos = line.find("#")
if pos >= 0:
line = line[:pos]
line = line.strip()
if not line:
continue
pair = line.split('=', maxsplit=1)
if len(pair) != 2:
raise Exception("Can't parse configuration line:", full_file)
env[pair[0]] = pair[1]
return env
class NetDrvEnv:
"""
Class for a single NIC / host env, with no remote end
"""
def __init__(self, src_path):
self._ns = None
self.env = _load_env_file(src_path)
if 'NETIF' in self.env:
self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0]
else:
self._ns = NetdevSimDev()
self.dev = self._ns.nsims[0].dev
self.ifindex = self.dev['ifindex']
def __enter__(self):
return self
def __exit__(self, ex_type, ex_value, ex_tb):
"""
__exit__ gets called at the end of a "with" block.
"""
self.__del__()
def __del__(self):
if self._ns:
self._ns.remove()
self._ns = None
class NetDrvEpEnv:
"""
Class for an environment with a local device and "remote endpoint"
which can be used to send traffic in.
For local testing it creates two network namespaces and a pair
of netdevsim devices.
"""
# Network prefixes used for local tests
nsim_v4_pfx = "192.0.2."
nsim_v6_pfx = "2001:db8::"
def __init__(self, src_path):
self.env = _load_env_file(src_path)
# Things we try to destroy
self.remote = None
# These are for local testing state
self._netns = None
self._ns = None
self._ns_peer = None
if "NETIF" in self.env:
self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0]
self.v4 = self.env.get("LOCAL_V4")
self.v6 = self.env.get("LOCAL_V6")
self.remote_v4 = self.env.get("REMOTE_V4")
self.remote_v6 = self.env.get("REMOTE_V6")
kind = self.env["REMOTE_TYPE"]
args = self.env["REMOTE_ARGS"]
else:
self.create_local()
self.dev = self._ns.nsims[0].dev
self.v4 = self.nsim_v4_pfx + "1"
self.v6 = self.nsim_v6_pfx + "1"
self.remote_v4 = self.nsim_v4_pfx + "2"
self.remote_v6 = self.nsim_v6_pfx + "2"
kind = "netns"
args = self._netns.name
self.remote = Remote(kind, args, src_path)
self.addr = self.v6 if self.v6 else self.v4
self.remote_addr = self.remote_v6 if self.remote_v6 else self.remote_v4
self.addr_ipver = "6" if self.v6 else "4"
# Bracketed addresses, some commands need IPv6 to be inside []
self.baddr = f"[{self.v6}]" if self.v6 else self.v4
self.remote_baddr = f"[{self.remote_v6}]" if self.remote_v6 else self.remote_v4
self.ifname = self.dev['ifname']
self.ifindex = self.dev['ifindex']
self._required_cmd = {}
def create_local(self):
self._netns = NetNS()
self._ns = NetdevSimDev()
self._ns_peer = NetdevSimDev(ns=self._netns)
with open("/proc/self/ns/net") as nsfd0, \
open("/var/run/netns/" + self._netns.name) as nsfd1:
ifi0 = self._ns.nsims[0].ifindex
ifi1 = self._ns_peer.nsims[0].ifindex
NetdevSimDev.ctrl_write('link_device',
f'{nsfd0.fileno()}:{ifi0} {nsfd1.fileno()}:{ifi1}')
ip(f" addr add dev {self._ns.nsims[0].ifname} {self.nsim_v4_pfx}1/24")
ip(f"-6 addr add dev {self._ns.nsims[0].ifname} {self.nsim_v6_pfx}1/64 nodad")
ip(f" link set dev {self._ns.nsims[0].ifname} up")
ip(f" addr add dev {self._ns_peer.nsims[0].ifname} {self.nsim_v4_pfx}2/24", ns=self._netns)
ip(f"-6 addr add dev {self._ns_peer.nsims[0].ifname} {self.nsim_v6_pfx}2/64 nodad", ns=self._netns)
ip(f" link set dev {self._ns_peer.nsims[0].ifname} up", ns=self._netns)
def __enter__(self):
return self
def __exit__(self, ex_type, ex_value, ex_tb):
"""
__exit__ gets called at the end of a "with" block.
"""
self.__del__()
def __del__(self):
if self._ns:
self._ns.remove()
self._ns = None
if self._ns_peer:
self._ns_peer.remove()
self._ns_peer = None
if self._netns:
del self._netns
self._netns = None
if self.remote:
del self.remote
self.remote = None
def require_v4(self):
if not self.v4 or not self.remote_v4:
raise KsftSkipEx("Test requires IPv4 connectivity")
def require_v6(self):
if not self.v6 or not self.remote_v6:
raise KsftSkipEx("Test requires IPv6 connectivity")
def _require_cmd(self, comm, key, host=None):
cached = self._required_cmd.get(comm, {})
if cached.get(key) is None:
cached[key] = cmd("command -v -- " + comm, fail=False,
shell=True, host=host).ret == 0
self._required_cmd[comm] = cached
return cached[key]
def require_cmd(self, comm, local=True, remote=False):
if local:
if not self._require_cmd(comm, "local"):
raise KsftSkipEx("Test requires command: " + comm)
if remote:
if not self._require_cmd(comm, "remote"):
raise KsftSkipEx("Test requires (remote) command: " + comm)
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