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 <david(a)gibson.dropbear.id.au>
---
avocado/tasst/scenario/__init__.py | 11 ++++
avocado/tasst/scenario/simple.py | 98 ++++++++++++++++++++++++++++++
2 files changed, 109 insertions(+)
create mode 100644 avocado/tasst/scenario/__init__.py
create mode 100644 avocado/tasst/scenario/simple.py
diff --git a/avocado/tasst/scenario/__init__.py b/avocado/tasst/scenario/__init__.py
new file mode 100644
index 0000000..8ca64a6
--- /dev/null
+++ b/avocado/tasst/scenario/__init__.py
@@ -0,0 +1,11 @@
+#! /usr/bin/python3
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# tasst - Test A Simple Socket Transport
+# library of test helpers for passt & pasta
+#
+# tasst/scenario - Helpers to set up various sample network topologies
+#
+# Copyright Red Hat
+# Author: David Gibson <david(a)gibson.dropbear.id.au>
diff --git a/avocado/tasst/scenario/simple.py b/avocado/tasst/scenario/simple.py
new file mode 100644
index 0000000..272d959
--- /dev/null
+++ b/avocado/tasst/scenario/simple.py
@@ -0,0 +1,98 @@
+#! /usr/bin/python3
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# tasst - Test A Simple Socket Transport
+# library of test helpers for passt & pasta
+#
+# tasst/scenario/simple - Smallest sensible network to use passt/pasta
+#
+# Copyright Red Hat
+# Author: David Gibson <david(a)gibson.dropbear.id.au>
+
+import contextlib
+
+from tasst import Tasst
+from tasst.nstool import UnshareSite
+from tasst.address import IpiAllocator, TEST_NET_2, TEST_NET6_TASST_B
+from tasst.site import Site
+from tasst.transfer import MetaTcpUploadTasst, MetaUdpTransferTasst, TransferTasstInfo
+from tasst.typing import typecheck
+
+
+class __SimpleNet:
+ """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.
+
+ """
+
+ def __init__(self, hostsite, gwsite):
+ self.simhost = typecheck(hostsite, Site)
+ self.gw = typecheck(gwsite, Site)
+
+ self.ifname = 'veth'
+ self.gw_ifname = 'gw' + self.ifname
+ self.simhost.veth(self.ifname, self.gw_ifname, self.gw)
+
+ ipa_local = IpiAllocator()
+ self.ip4, self.ip6 = ipa_local.next_ipis()
+ self.gw_ip4, self.gw_ip6 = ipa_local.next_ipis()
+
+ ipa_remote = IpiAllocator(TEST_NET_2, TEST_NET6_TASST_B)
+ self.remote_ip4, self.remote_ip6 = ipa_remote.next_ipis()
+
+ 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(self.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(self.ifname, family='inet6',
scope='link')[0]
+
+ # Set up the default route
+ self.simhost.fg('ip -4 route add default via
{}'.format(self.gw_ip4.ip), sudo=True)
+ self.simhost.fg('ip -6 route add default via {} dev {}'
+ .format(self.gw_ip6_ll.ip, self.ifname), sudo=True)
+
+(a)contextlib.contextmanager
+def simple_net(name):
+ name = typecheck(name, str)
+ with UnshareSite(name + '.simhost', '-Ucnpf --mount-proc') as
simhost, \
+ UnshareSite(name + '.gw', '-n', parent=simhost, sudo=True)
as gw:
+ yield __SimpleNet(simhost, gw)
+
+
+class SimpleNetConnectivityTasst(MetaTcpUploadTasst, MetaUdpTransferTasst):
+ """
+ Check connectivity between the simulated host and the gateway,
+ before involving passt/pasta.
+
+ :avocado: tags=meta
+
+ """
+
+ @contextlib.contextmanager
+ def setup_transfer(self):
+ with simple_net(type(self).__name__) as simnet:
+ yield TransferTasstInfo('test/small.bin', simnet.simhost,
simnet.gw,
+ simnet.remote_ip4.ip, simnet.remote_ip6.ip, 10000)
--
2.40.1