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/__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 <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..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 <david(a)gibson.dropbear.id.au>
+
+"""
+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)
+
+
+(a)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