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>
---
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 <david(a)gibson.dropbear.id.au>
+
+"""
+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 <david(a)gibson.dropbear.id.au>
+
+"""
+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
+ )
+
+
+(a)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)
+
+
+(a)test_transfers(ip4=__SimpleNet.REMOTE_IP4.ip,
+ ip6=__SimpleNet.REMOTE_IP6.ip,
+ port=10000)
+(a)contextlib.contextmanager
+def simple_net_transfers():
+ with simple_net() as net:
+ yield (net.simhost, net.gw)
--
2.41.0