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authorOle Troan <ot@cisco.com>2018-08-16 22:08:49 +0200
committerJohn Lo <loj@cisco.com>2018-08-17 21:38:47 +0000
commitb3655e5592e3e8e48eb087632f3fa71915891a9f (patch)
tree9d73bb5fa359ed1a5c27f20d829494e2c302310a /test
parentee4efa7c39c914eb908e7fd629b18585cfa70b4a (diff)
VPP-1392: VXLAN fails with IP fragmentation
Not only is it wasteful to send all fragments back through ip4-lookup, but it doesn't work with tunnel mechanisms that don't have IP enabled on their payload side. Change-Id: Ic92d95982dddaa70969a2a6ea2f98edec7614425 Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'test')
-rw-r--r--test/test_vxlan.py47
1 files changed, 46 insertions, 1 deletions
diff --git a/test/test_vxlan.py b/test/test_vxlan.py
index 1411dd6c026..3c824b5761a 100644
--- a/test/test_vxlan.py
+++ b/test/test_vxlan.py
@@ -6,11 +6,27 @@ import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
-from scapy.layers.l2 import Ether
+from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
from scapy.layers.vxlan import VXLAN
from scapy.utils import atol
+import StringIO
+
+
+def reassemble(listoffragments):
+ buffer = StringIO.StringIO()
+ first = listoffragments[0]
+ buffer.seek(20)
+ for pkt in listoffragments:
+ buffer.seek(pkt[IP].frag*8)
+ buffer.write(pkt[IP].payload)
+ first.len = len(buffer.getvalue()) + 20
+ first.flags = 0
+ del(first.chksum)
+ header = str(first[IP])[:20]
+ return first[IP].__class__(header + buffer.getvalue())
+
class TestVxlan(BridgeDomain, VppTestCase):
""" VXLAN Test Case """
@@ -222,6 +238,35 @@ class TestVxlan(BridgeDomain, VppTestCase):
super(TestVxlan, cls).tearDownClass()
raise
+ def test_encap_big_packet(self):
+ """ Encapsulation test send big frame from pg1
+ Verify receipt of encapsulated frames on pg0
+ """
+
+ self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0])
+
+ frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
+ IP(src='4.3.2.1', dst='1.2.3.4') /
+ UDP(sport=20000, dport=10000) /
+ Raw('\xa5' * 1450))
+
+ self.pg1.add_stream([frame])
+
+ self.pg0.enable_capture()
+
+ self.pg_start()
+
+ # Pick first received frame and check if it's correctly encapsulated.
+ out = self.pg0.get_capture(2)
+ ether = out[0]
+ pkt = reassemble(out)
+ pkt = ether / pkt
+ self.check_encapsulation(pkt, self.single_tunnel_bd)
+
+ payload = self.decapsulate(pkt)
+ # TODO: Scapy bug?
+ # self.assert_eq_pkts(payload, frame)
+
# Method to define VPP actions before tear down of the test case.
# Overrides tearDown method in VppTestCase class.
# @param self The object pointer.