From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by passt.top (Postfix) with ESMTPS id 841415A027A for ; Tue, 27 Jun 2023 04:54:47 +0200 (CEST) Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4Qqq7K1bxCz4wr1; Tue, 27 Jun 2023 12:54:37 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=201602; t=1687834477; bh=nWF6AUbF6MHIAMD4tIx8ybJAF43mNs/zA6DAifloYBE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZNGe7son5+eSPPsYWqq4lke8IQYajINMgQdnKevkD2F0bWBqA1pOI80kMPHQq4pYX G3K5379WXiUg1zwpWM1fwbWpahqJpfuP7NLCQ6SR0q7NMaoQHoN27Xn5u4mUzXoZ21 WDPWWS9JkRQRUea2GSN5U0JLo4t72FdoeffAT8Qo= From: David Gibson To: passt-dev@passt.top, Stefano Brivio Subject: [PATCH 26/27] tasst: Helpers to construct a simple network environment for tests Date: Tue, 27 Jun 2023 12:54:27 +1000 Message-ID: <20230627025429.2209702-27-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230627025429.2209702-1-david@gibson.dropbear.id.au> References: <20230627025429.2209702-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: Y7QAPGXCMTEW3ILSNNUL6HKV562D2QNQ X-Message-ID-Hash: Y7QAPGXCMTEW3ILSNNUL6HKV562D2QNQ 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: crosa@redhat.com, jarichte@redhat.com, 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/scenario/__init__.py | 12 ++++ test/tasst/scenario/simple.py | 98 +++++++++++++++++++++++++++++++++ 2 files changed, 110 insertions(+) create mode 100644 test/tasst/scenario/__init__.py create mode 100644 test/tasst/scenario/simple.py 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..503a388a --- /dev/null +++ b/test/tasst/scenario/simple.py @@ -0,0 +1,98 @@ +#! /usr/bin/env avocado-runner-avocado-classless + +# 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 tasst.nstool import unshare_site +from tasst.address import IpiAllocator, TEST_NET_2, TEST_NET6_TASST_B +from tasst.exesite import Site +from tasst.transfer import test_transfers +from tasst.typecheck import typecheck + + +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' + ipa_local = IpiAllocator() + (IP4, IP6) = ipa_local.next_ipis() + (GW_IP4, GW_IP6) = ipa_local.next_ipis() + + ipa_remote = IpiAllocator(TEST_NET_2, TEST_NET6_TASST_B) + (REMOTE_IP4, REMOTE_IP6) = ipa_remote.next_ipis() + + def __init__(self, hostsite, gwsite): + self.simhost = typecheck(hostsite, Site) + self.gw = typecheck(gwsite, Site) + + ifname = self.IFNAME + self.gw_ifname = 'gw' + ifname + self.simhost.veth(self.IFNAME, self.gw_ifname, self.gw) + + self.gw.ifup('lo') + self.gw.ifup(self.gw_ifname, self.GW_IP4, self.GW_IP6, + self.REMOTE_IP4, self.REMOTE_IP6) + + self.simhost.ifup('lo') + self.simhost.ifup(ifname, self.IP4, self.IP6) + + # Once link is up on both sides, SLAAC will run + self.gw_ip6_ll = self.gw.addr_wait(self.gw_ifname, + family='inet6', scope='link')[0] + self.ip6_ll = self.simhost.addr_wait(ifname, + family='inet6', scope='link')[0] + + # Set up the default route + self.simhost.fg(f'ip -4 route add default via {self.GW_IP4.ip}', + sudo=True) + self.simhost.fg( + f'ip -6 route add default via {self.gw_ip6_ll.ip} dev {ifname}', + sudo=True + ) + + +@contextlib.contextmanager +def simple_net(): + with unshare_site('simhost', '-Ucnpf --mount-proc') as simhost, \ + unshare_site('gw', '-n', parent=simhost, sudo=True) as gw: + yield __SimpleNet(simhost, gw) + + +@test_transfers(ip4=__SimpleNet.REMOTE_IP4.ip, + ip6=__SimpleNet.REMOTE_IP6.ip, + port=10000) +@contextlib.contextmanager +def simple_net_transfers(): + with simple_net() as net: + yield (net.simhost, net.gw) -- 2.41.0