From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: passt.top; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: passt.top; dkim=pass (2048-bit key; secure) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.a=rsa-sha256 header.s=202408 header.b=kx941lVV; dkim-atps=neutral Received: from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by passt.top (Postfix) with ESMTPS id 74C2B5A027B for ; Mon, 26 Aug 2024 04:09:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=202408; t=1724638184; bh=lpvFzbhSMjxEwpgLFmZITus0/6KF1HRc2oE7w6plUMs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kx941lVVwDH7nJiqPP6/i85hEUtrzzoGj62uh0oSVDr+pY4NS4mqVyGTTNO+owIE/ 61DUIVXGKoPW7sJQamqK8EnrlkdPxhNJzjwHvel/eIFMf3Q9ChFurEMlH18SKndbxv v1wt/KZtzb6v2mpjBruznnZ+qvkwIHN1onI2Rg6xFRNX8Yt5FciwOXNSlbtjmzC8F2 InvRC02nW1wcfaXWlAs/sTvpnOYeleF+FILUWaHSsXBeP/ADJtOdv/7l26St5lo1Wl qFSIDHJboJt26D2+whUQ/vdTHuuKi32zuDgVaoZZZ8lHuLpeu0imn1I1z/gSdirpQ4 m2+X11LKhakuw== Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4WsYyw68lwz4xD0; Mon, 26 Aug 2024 12:09:44 +1000 (AEST) From: David Gibson To: Stefano Brivio , passt-dev@passt.top Subject: [PATCH v3 14/15] tasst: Helpers to construct a simple network environment for tests Date: Mon, 26 Aug 2024 12:09:41 +1000 Message-ID: <20240826020942.545155-15-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240826020942.545155-1-david@gibson.dropbear.id.au> References: <20240826020942.545155-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: V4NNGYBKF7KWUH7ZWGVO4OPVQWXUWH2J X-Message-ID-Hash: V4NNGYBKF7KWUH7ZWGVO4OPVQWXUWH2J X-MailFrom: dgibson@gandalf.ozlabs.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Cleber Rosa , David Gibson X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: This constructs essentially the simplest sensible network for passt/pasta to operate in. We have one netns "simhost" to represent the host where we will run passt or pasta, and a second "gw" to represent its default gateway. Signed-off-by: David Gibson --- test/tasst/__main__.py | 1 + test/tasst/scenario/__init__.py | 12 ++++ test/tasst/scenario/simple.py | 108 ++++++++++++++++++++++++++++++++ 3 files changed, 121 insertions(+) create mode 100644 test/tasst/scenario/__init__.py create mode 100644 test/tasst/scenario/simple.py diff --git a/test/tasst/__main__.py b/test/tasst/__main__.py index f94001e7..7e343492 100644 --- a/test/tasst/__main__.py +++ b/test/tasst/__main__.py @@ -20,6 +20,7 @@ MODULES = [ 'dhcp', 'ip', 'ndp', + 'scenario.simple', 'transfer', 'unshare', 'veth', diff --git a/test/tasst/scenario/__init__.py b/test/tasst/scenario/__init__.py new file mode 100644 index 00000000..4ea4584d --- /dev/null +++ b/test/tasst/scenario/__init__.py @@ -0,0 +1,12 @@ +#! /usr/bin/python3 + +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Copyright Red Hat +# Author: David Gibson + +""" +Test A Simple Socket Transport + +scenario/ - Helpers to set up various sample network topologies +""" diff --git a/test/tasst/scenario/simple.py b/test/tasst/scenario/simple.py new file mode 100644 index 00000000..6ae3540a --- /dev/null +++ b/test/tasst/scenario/simple.py @@ -0,0 +1,108 @@ +#! /usr/bin/env python3 + +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Copyright Red Hat +# Author: David Gibson + +""" +Test A Simple Socket Transport + +scenario/simple.py - Smallest sensible network to use passt/pasta +""" + +import contextlib +from typing import Iterator + +from .. import ip, transfer, unshare, veth + + +class __SimpleNet: # pylint: disable=R0903 + """A simple network setup scenario + + The sample network has 2 sites (network namespaces) connected with + a veth link: + [simhost] <-veth-> [gw] + + gw is set up as the default router for simhost. + + simhost has addresses: + self.IP4 (IPv4), self.IP6 (IPv6), self.ip6_ll (IPv6 link local) + + gw has addresses: + self.GW_IP4 (IPv4), self.GW_IP6 (IPv6), + self.gw_ip6_ll (IPv6 link local) + self.REMOTE_IP4 (IPv4), self.REMOTE_IP6 (IPv6) + + The "remote" addresses are on a different subnet from the others, + so the only way for simhost to reach them is via its default + route. This helps to exercise that we're actually using that, + rather than just local net routes. + + """ + + IFNAME = 'veth' + GW_IFNAME = 'gw' + IFNAME + ipa_local = ip.IpiAllocator() + (IP4, IP6) = ipa_local.next_ipis() + (GW_IP4, GW_IP6) = ipa_local.next_ipis() + + ipa_remote = ip.IpiAllocator(ip.TEST_NET_2, + ip.TEST_NET6_TASST_B) + (REMOTE_IP4, REMOTE_IP6) = ipa_remote.next_ipis() + + simhost: unshare.Unshare + gw: unshare.Unshare + + def __init__(self, simhost: unshare.Unshare, gw: unshare.Unshare) -> None: + self.simhost = simhost + self.gw = gw + + ip.ifup(self.gw, 'lo') + ip.ifup(self.gw, self.GW_IFNAME, self.GW_IP4, self.GW_IP6, + self.REMOTE_IP4, self.REMOTE_IP6) + + ip.ifup(simhost, 'lo') + ip.ifup(simhost, self.IFNAME, self.IP4, self.IP6) + + # Once link is up on both sides, SLAAC will run + self.gw_ip6_ll = ip.addr_wait(self.gw, self.GW_IFNAME, + family='inet6', scope='link')[0] + self.ip6_ll = ip.addr_wait(self.simhost, self.IFNAME, + family='inet6', scope='link')[0] + + # Set up the default route + self.simhost.fg('ip', '-4', 'route', 'add', 'default', + 'via', f'{self.GW_IP4.ip}', privilege=True) + self.simhost.fg('ip', '-6', 'route', 'add', 'default', + 'via', f'{self.gw_ip6_ll.ip}', 'dev', self.IFNAME, + privilege=True) + + +@contextlib.contextmanager +def simple_net() -> Iterator[__SimpleNet]: + with unshare.unshare('simhost', '-Ucnpf', '--mount-proc') as simhost, \ + unshare.unshare('gw', '-n', parent=simhost, privilege=True) as gw, \ + veth.veth(simhost, __SimpleNet.IFNAME, __SimpleNet.GW_IFNAME, gw): + yield __SimpleNet(simhost, gw) + + +def simple_transfer4() -> Iterator[transfer.TransferScenario]: + with simple_net() as snet: + yield transfer.TransferScenario(client=snet.simhost, + server=snet.gw, + connect_ip=snet.REMOTE_IP4.ip, + connect_port=10000) + + +def simple_transfer6() -> Iterator[transfer.TransferScenario]: + with simple_net() as snet: + yield transfer.TransferScenario(client=snet.simhost, + server=snet.gw, + connect_ip=snet.REMOTE_IP6.ip, + connect_port=10000) + + +def selftests() -> None: + transfer.TransferScenario.test(simple_transfer4) + transfer.TransferScenario.test(simple_transfer6) -- 2.46.0