Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
avocado/tasst/dhcp.py | 152 ++++++++++++++++++++++++++++++++++++++++
avocado/tasst/dhcpv6.py | 135 +++++++++++++++++++++++++++++++++++
2 files changed, 287 insertions(+)
create mode 100644 avocado/tasst/dhcp.py
create mode 100644 avocado/tasst/dhcpv6.py
diff --git a/avocado/tasst/dhcp.py b/avocado/tasst/dhcp.py
new file mode 100644
index 0000000..be226e4
--- /dev/null
+++ b/avocado/tasst/dhcp.py
@@ -0,0 +1,152 @@
+#! /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/dhcp.py - Helpers for testing DHCP
+#
+# Copyright Red Hat
+# Author: David Gibson <david(a)gibson.dropbear.id.au>
+
+import contextlib
+import ipaddress
+import os
+
+from tasst import Tasst, TasstSubData
+from tasst.address import IpiAllocator, TEST_NET_1
+from tasst.nstool import UnshareSite
+from tasst.site import Site
+from tasst.typing import typecheck
+
+
+class DhcpTasstInfo:
+ def __init__(self, site, ifname, addr, gw, mtu):
+ self.site = typecheck(site, Site)
+ self.ifname = typecheck(ifname, str)
+ self.addr = typecheck(addr, ipaddress.IPv4Address)
+ self.gw = typecheck(gw, ipaddress.IPv4Address)
+ self.mtu = typecheck(mtu, int)
+
+ site.require_cmds('ip')
+
+
+class BaseDhcpTasst(Tasst):
+ """
+ Test DHCP behaviour.
+
+ :avocado: disable
+ """
+
+ DHCLIENT = '/sbin/dhclient'
+
+ def setup_dhcp(self):
+ raise NotImplementedError("{} must implement setup_dhcp()
method".format(type(self).__name__))
+
+ @contextlib.contextmanager
+ def dhclient(self):
+ with self.setup_dhcp() as dti:
+ dti = typecheck(dti, DhcpTasstInfo)
+
+ dti.site.require_cmds(self.DHCLIENT, 'cat', 'kill')
+
+ pidfile = os.path.join(self.workdir, 'dhclient.pid')
+ leasefile = os.path.join(self.workdir, 'dhclient.leases')
+
+ # We need '-nc' because we may be running with
+ # capabilities but not UID 0. Without -nc dhclient drops
+ # capabilities before invoking dhclient-script, so it's
+ # unable to actually configure the interface
+ dti.site.fg('{} -4 -v -nc -pf {} -lf {} {}'
+ .format(self.DHCLIENT, pidfile, leasefile, dti.ifname),
sudo=True)
+
+ try:
+ yield dti
+ finally:
+ pid = int(dti.site.output('cat {}'.format(pidfile)))
+ dti.site.fg('kill {}'.format(pid))
+
+ def test_addr(self):
+ with self.dhclient() as dti:
+ (addr,) = dti.site.addrs(dti.ifname, family='inet',
scope='global')
+ self.assertEquals(addr.ip, dti.addr)
+
+ def test_route(self):
+ with self.dhclient() as dti:
+ (defroute,) = dti.site.routes4(dst='default')
+ self.assertEquals(ipaddress.ip_address(defroute['gateway']),
dti.gw)
+
+ def test_mtu(self):
+ with self.dhclient() as dti:
+ self.assertEquals(dti.site.mtu(dti.ifname), dti.mtu)
+
+
+class MetaDhcpTasst(BaseDhcpTasst):
+ """Ugly workaround for
+ https://github.com/avocado-framework/avocado/issues/5680.
+ Explicitly apply the "meta" tag to inherited tests
+
+ :avocado: disable
+ :avocado: tags=meta
+
+ """
+
+ def test_addr(self):
+ super().test_addr()
+
+ def test_route(self):
+ super().test_route()
+
+ def test_mtu(self):
+ super().test_mtu()
+
+
+class DhcpdTasst(MetaDhcpTasst):
+ DHCPD = 'dhcpd'
+ SUBNET = TEST_NET_1
+
+ @contextlib.contextmanager
+ def setup_dhcp(self):
+ ifname = 'clientif'
+ server_ifname = 'serverif'
+
+ with UnshareSite(type(self).__name__ + '.client', '-Un') as
client, \
+ UnshareSite(type(self).__name__ + '.server', '-n',
+ parent=client, sudo=True) as server:
+
+ server.require_cmds(self.DHCPD)
+
+ client.veth(ifname, server_ifname, server)
+
+ # Configure the DHCP server
+ ipa = IpiAllocator(self.SUBNET)
+ (server_ip4,) = ipa.next_ipis()
+ (client_ip4,) = ipa.next_ipis()
+
+ confpath = os.path.join(self.workdir, 'dhcpd.conf')
+ open(confpath, 'w').write('''
+ subnet {} netmask {} {{
+ option routers {};
+ range {} {};
+ }}
+ '''.format(self.SUBNET.network_address, self.SUBNET.netmask,
+ server_ip4.ip, client_ip4.ip, client_ip4.ip))
+ pidpath = os.path.join(self.workdir, 'dhcpd.pid')
+ leasepath = os.path.join(self.workdir, 'dhcpd.leases')
+ open(leasepath, 'w').write('')
+
+ server.ifup('lo')
+ server.ifup(server_ifname, server_ip4)
+
+ opts = ('-f -d -4 -cf {} -lf {} -pf {}'.format(confpath, leasepath,
pidpath))
+ server.fg('{} -t {}'.format(self.DHCPD, opts)) # test config
+ with server.bg('{} {}'.format(self.DHCPD, opts), sudo=True) as
dhcpd:
+ # Configure the client
+ client.ifup('lo')
+
+ yield DhcpTasstInfo(client, ifname, client_ip4.ip, server_ip4.ip, 1500)
+
+ pid = int(open(pidpath).read())
+ server.fg('kill {}'.format(pid))
+ status = dhcpd.wait()
diff --git a/avocado/tasst/dhcpv6.py b/avocado/tasst/dhcpv6.py
new file mode 100644
index 0000000..5a0c166
--- /dev/null
+++ b/avocado/tasst/dhcpv6.py
@@ -0,0 +1,135 @@
+#! /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/dhcpv6.py - Helpers for testing DHCPv6
+#
+# Copyright Red Hat
+# Author: David Gibson <david(a)gibson.dropbear.id.au>
+
+import contextlib
+import ipaddress
+import os
+
+from tasst import Tasst, TasstSubData
+from tasst.address import IpiAllocator, TEST_NET6_TASST_A
+from tasst.nstool import UnshareSite
+from tasst.site import Site
+from tasst.typing import typecheck
+
+
+class Dhcpv6TasstInfo:
+ def __init__(self, site, ifname, addr):
+ self.site = typecheck(site, Site)
+ self.ifname = typecheck(ifname, str)
+ self.addr = typecheck(addr, ipaddress.IPv6Address)
+
+ site.require_cmds('ip')
+
+
+class BaseDhcpv6Tasst(Tasst):
+ """
+ Test DHCPv6 behaviour.
+
+ :avocado: disable
+ """
+
+ DHCLIENT = '/sbin/dhclient'
+
+ def setup_dhcpv6(self):
+ raise NotImplementedError("{} must implement setup_dhcpv6()
method".format(type(self).__name__))
+
+ @contextlib.contextmanager
+ def dhclientv6(self):
+ with self.setup_dhcpv6() as d6ti:
+ d6ti.site.require_cmds(self.DHCLIENT)
+
+ pidfile = os.path.join(self.workdir, 'dhclient.pid')
+ leasefile = os.path.join(self.workdir, 'dhclient.leases')
+
+ # We need '-nc' because we may be running with
+ # capabilities but not UID 0. Without -nc dhclient drops
+ # capabilities before invoking dhclient-script, so it's
+ # unable to actually configure the interface
+ d6ti.site.fg('{} -6 -v -nc -pf {} -lf {} {}'
+ .format(self.DHCLIENT, pidfile, leasefile, d6ti.ifname),
sudo=True)
+
+ yield d6ti
+
+ pid = int(d6ti.site.output('cat {}'.format(pidfile)))
+ d6ti.site.fg('kill {}'.format(pid))
+
+ def test_addr(self):
+ with self.dhclientv6() as d6ti:
+ addrs = [a.ip for a in d6ti.site.addrs(d6ti.ifname, family='inet6',
scope='global')]
+ self.assertIn(d6ti.addr, addrs) # Might also have a SLAAC address
+
+
+class MetaDhcpv6Tasst(BaseDhcpv6Tasst):
+ """Ugly workaround for
+ https://github.com/avocado-framework/avocado/issues/5680.
+ Explicitly apply the "meta" tag to inherited tests
+
+ :avocado: disable
+ :avocado: tags=meta
+
+ """
+
+ def test_addr(self):
+ super().test_addr()
+
+
+class Dhcpd6Tasst(MetaDhcpv6Tasst):
+ """
+ :avocado: tags=meta
+ """
+
+ DHCPD = 'dhcpd'
+ SUBNET = TEST_NET6_TASST_A
+
+ @contextlib.contextmanager
+ def setup_dhcpv6(self):
+ ifname = 'clientif'
+ server_ifname = 'serverif'
+
+ with UnshareSite(type(self).__name__ + '.client', '-Un') as
client, \
+ UnshareSite(type(self).__name__ + '.server', '-n',
+ parent=client, sudo=True) as server:
+ server.require_cmds(self.DHCPD)
+
+ client.veth(ifname, server_ifname, server)
+
+ # Allocate IPs, and sort out link local addressing
+ ipa = IpiAllocator(self.SUBNET)
+ (server_ip6,) = ipa.next_ipis()
+ (client_ip6,) = ipa.next_ipis()
+
+ server.ifup('lo')
+ server.ifup(server_ifname, server_ip6)
+ client.ifup('lo')
+ client.ifup(ifname)
+ (server_ip6_ll,) = server.addr_wait(server_ifname, family='inet6',
scope='link')
+
+ # Configure the DHCP server
+ confpath = os.path.join(self.workdir, 'dhcpd.conf')
+ open(confpath, 'w').write('''
+ subnet6 {} {{
+ range6 {} {};
+ }}
+ '''.format(self.SUBNET, client_ip6.ip, client_ip6.ip))
+ pidpath = os.path.join(self.workdir, 'dhcpd.pid')
+ leasepath = os.path.join(self.workdir, 'dhcpd.leases')
+ open(leasepath, 'w').write('')
+
+ opts = ('-f -d -6 -cf {} -lf {} -pf {}'.format(confpath, leasepath,
pidpath))
+ server.fg('{} -t {}'.format(self.DHCPD, opts)) # test config
+ with server.bg('{} {}'.format(self.DHCPD, opts), sudo=True) as
dhcpd:
+ yield Dhcpv6TasstInfo(client, ifname, client_ip6.ip)
+
+ pid = int(open(pidpath).read())
+ server.fg('kill {}'.format(pid))
+ status = dhcpd.wait()
+
--
2.40.1