From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by passt.top (Postfix) with ESMTPS id 669325A031D for ; Mon, 05 Aug 2024 14:37:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=202312; t=1722861425; bh=l/Ge4t9fskWqYU9sQnz4+zlRert7J6UVQrhzjhLSUQM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=klXFsOWMsfkFBaV2gdBHIFZZvN5e3k2aGmGqI0SoMZOvMP2dOhoY+GqBeGuIE5YSg r0r17U3rf9cD91t2bnhjiM0DLrvYze+27gb9guzbYwbLL8xE/ECAjAx2GX1WlDQBDu nJG8BSuTcO3rT9i7JcFE88kyVtibngc12K5J/snvDzkxDvqpVXU42LWPWLsGbNdIsP iy2kDHvlkcgbVQ6Z+qJc/q/U620ANFUrfbVNOm5nDNnxV5uWkHfiRdUG5pblbwTzCU OE9QXlu9qOHvp8L3tfSh/Z/lJIDvG91/vTgfo5tmJo6r9qArf4seOpBHT2dzwPlMyo ETcWYWwWxL2cQ== Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4WcwtT3Cq9z4x88; Mon, 5 Aug 2024 22:37:05 +1000 (AEST) From: David Gibson To: Stefano Brivio , passt-dev@passt.top Subject: [PATCH v2 21/22] tasst: Helpers to construct a simple network environment for tests Date: Mon, 5 Aug 2024 22:37:00 +1000 Message-ID: <20240805123701.1720730-22-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240805123701.1720730-1-david@gibson.dropbear.id.au> References: <20240805123701.1720730-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: URMA4NZZJGPGXZXJ5A3N2AHYE67MGSMR X-Message-ID-Hash: URMA4NZZJGPGXZXJ5A3N2AHYE67MGSMR 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/Makefile | 3 +- test/tasst/__main__.py | 1 + test/tasst/scenario/__init__.py | 12 ++++ test/tasst/scenario/simple.py | 109 ++++++++++++++++++++++++++++++++ 4 files changed, 124 insertions(+), 1 deletion(-) create mode 100644 test/tasst/scenario/__init__.py create mode 100644 test/tasst/scenario/simple.py diff --git a/test/Makefile b/test/Makefile index 0eeaf82e..6748d38a 100644 --- a/test/Makefile +++ b/test/Makefile @@ -74,7 +74,8 @@ AVOCADO_JOBS = $(EXETER_JOBS) avocado/static_checkers.json TASST_SRCS = __init__.py __main__.py address.py dhcp.py dhcpv6.py ndp.py \ nstool.py snh.py transfer.py \ - selftest/__init__.py selftest/static_ifup.py selftest/veth.py + selftest/__init__.py selftest/static_ifup.py selftest/veth.py \ + scenario/__init__.py scenario/simple.py EXETER_META = meta/lint.json meta/tasst.json META_JOBS = $(EXETER_META) diff --git a/test/tasst/__main__.py b/test/tasst/__main__.py index 8c4efd74..491c68c9 100644 --- a/test/tasst/__main__.py +++ b/test/tasst/__main__.py @@ -14,6 +14,7 @@ import exeter # We import just to get the exeter tests, which flake8 can't see from . import dhcp, dhcpv6, ndp, nstool, snh, transfer # noqa: F401 +from .scenario import simple # noqa: F401 from .selftest import static_ifup, veth # noqa: F401 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..d8b78568 --- /dev/null +++ b/test/tasst/scenario/simple.py @@ -0,0 +1,109 @@ +#! /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 .. import address, nstool, transfer + + +class __SimpleNet: # pylint: disable=R0903 + """A simple network setup scenario + + The sample network has 2 snhs (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 = address.IpiAllocator() + (IP4, IP6) = ipa_local.next_ipis() + (GW_IP4, GW_IP6) = ipa_local.next_ipis() + + ipa_remote = address.IpiAllocator(address.TEST_NET_2, + address.TEST_NET6_TASST_B) + (REMOTE_IP4, REMOTE_IP6) = ipa_remote.next_ipis() + + def __init__(self, simhost, gw): + self.simhost = simhost + self.gw = gw + + 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('ip', '-4', 'route', 'add', 'default', + 'via', f'{self.GW_IP4.ip}', capable=True) + self.simhost.fg('ip', '-6', 'route', 'add', 'default', + 'via', f'{self.gw_ip6_ll.ip}', 'dev', f'{ifname}', + capable=True) + + +@contextlib.contextmanager +def simple_net(): + with nstool.unshare_snh('simhost', '-Ucnpf', '--mount-proc') as simhost, \ + nstool.unshare_snh('gw', '-n', parent=simhost, capable=True) as gw: + yield __SimpleNet(simhost, gw) + + +@contextlib.contextmanager +def simple_transfer4_setup(): + with simple_net() as snet: + yield transfer.TransferTestScenario(client=snet.simhost, + server=snet.gw, + connect_ip=snet.REMOTE_IP4.ip, + connect_port=10000) + + +transfer.transfer_tests(simple_transfer4_setup) + + +@contextlib.contextmanager +def simple_transfer6_setup(): + with simple_net() as snet: + yield transfer.TransferTestScenario(client=snet.simhost, + server=snet.gw, + connect_ip=snet.REMOTE_IP6.ip, + connect_port=10000) + + +transfer.transfer_tests(simple_transfer6_setup) -- 2.45.2