pg: add GSO support

Type: feature

Change-Id: I72676495a85fbecc946aa266a75234cce70c3a5e
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

3 files changed, 193 insertions, 4 deletions

diff --git a/test/framework.py b/test/framework.py
index 59c451d475c..e4d0f9d13ab 100644
--- a/test/framework.py
+++ b/test/framework.py
@@ -762,7 +762,7 @@ class VppTestCase(unittest.TestCase):
         cls._captures = []
 
     @classmethod
-    def create_pg_interfaces(cls, interfaces):
+    def create_pg_interfaces(cls, interfaces, gso=0, gso_size=0):
         """
         Create packet-generator interfaces.
 
@@ -772,7 +772,7 @@ class VppTestCase(unittest.TestCase):
         """
         result = []
         for i in interfaces:
-            intf = VppPGInterface(cls, i)
+            intf = VppPGInterface(cls, i, gso, gso_size)
             setattr(cls, intf.name, intf)
             result.append(intf)
         cls.pg_interfaces = result
diff --git a/test/test_gso.py b/test/test_gso.py
new file mode 100644
index 00000000000..43d9e92380d
--- /dev/null
+++ b/test/test_gso.py
@@ -0,0 +1,175 @@
+#!/usr/bin/env python
+"""GSO functional tests"""
+
+#
+# Add tests for:
+# - GSO
+# - Verify that sending Jumbo frame without GSO enabled correctly
+# - Verify that sending Jumbo frame with GSO enabled correctly
+# - Verify that sending Jumbo frame with GSO enabled only on ingress interface
+#
+import unittest
+
+from scapy.packet import Raw
+from scapy.layers.inet6 import IPv6, Ether, IP, UDP, ICMPv6PacketTooBig
+from scapy.layers.inet import TCP, ICMP
+from scapy.layers.vxlan import VXLAN
+from scapy.data import ETH_P_IP, ETH_P_IPV6, ETH_P_ARP
+
+from framework import VppTestCase, VppTestRunner
+from vpp_object import VppObject
+from vpp_interface import VppInterface
+from vpp_ip import DpoProto
+from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto
+from socket import AF_INET, AF_INET6, inet_pton
+from util import reassemble4
+
+
+""" Test_gso is a subclass of VPPTestCase classes.
+    GSO tests.
+"""
+
+
+class TestGSO(VppTestCase):
+    """ GSO Test Case """
+
+    def __init__(self, *args):
+        VppTestCase.__init__(self, *args)
+
+    @classmethod
+    def setUpClass(self):
+        super(TestGSO, self).setUpClass()
+
+    @classmethod
+    def tearDownClass(self):
+        super(TestGSO, self).tearDownClass()
+
+    def setUp(self):
+        super(TestGSO, self).setUp()
+
+    def tearDown(self):
+        super(TestGSO, self).tearDown()
+        if not self.vpp_dead:
+            for i in self.pg_interfaces:
+                i.unconfig_ip4()
+                i.unconfig_ip6()
+                i.admin_down()
+
+    def test_gso(self):
+        """ GSO test """
+        #
+        # Send jumbo frame with gso disabled and DF bit is set
+        #
+        self.create_pg_interfaces(range(2))
+        for i in self.pg_interfaces:
+            i.admin_up()
+            i.config_ip4()
+            i.config_ip6()
+            i.disable_ipv6_ra()
+            i.resolve_arp()
+            i.resolve_ndp()
+
+        p4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+              IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4,
+                 flags='DF') /
+              TCP(sport=1234, dport=1234) /
+              Raw('\xa5' * 65200))
+
+        rxs = self.send_and_expect(self.pg0, [p4], self.pg0)
+
+        for rx in rxs:
+            self.assertEqual(rx[Ether].src, self.pg0.local_mac)
+            self.assertEqual(rx[Ether].dst, self.pg0.remote_mac)
+            self.assertEqual(rx[IP].src, self.pg0.local_ip4)
+            self.assertEqual(rx[IP].dst, self.pg0.remote_ip4)
+            self.assertEqual(rx[ICMP].type, 3)  # "dest-unreach"
+            self.assertEqual(rx[ICMP].code, 4)  # "fragmentation-needed"
+
+        #
+        # Send jumbo frame with gso enabled and DF bit is set
+        # input and output interfaces support GSO
+        #
+        self.create_pg_interfaces(range(2, 4), 1, 1460)
+        for i in self.pg_interfaces:
+            i.admin_up()
+            i.config_ip4()
+            i.config_ip6()
+            i.disable_ipv6_ra()
+            i.resolve_arp()
+            i.resolve_ndp()
+
+        p41 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) /
+               IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4,
+                  flags='DF') /
+               TCP(sport=1234, dport=1234) /
+               Raw('\xa5' * 65200))
+
+        rxs = self.send_and_expect(self.pg2, [p41], self.pg3)
+
+        for rx in rxs:
+            self.assertEqual(rx[Ether].src, self.pg3.local_mac)
+            self.assertEqual(rx[Ether].dst, self.pg3.remote_mac)
+            self.assertEqual(rx[IP].src, self.pg2.remote_ip4)
+            self.assertEqual(rx[IP].dst, self.pg3.remote_ip4)
+            self.assertEqual(rx[IP].len, 65240)  # 65200 + 20 (IP) + 20 (TCP)
+            self.assertEqual(rx[TCP].sport, 1234)
+            self.assertEqual(rx[TCP].dport, 1234)
+
+        #
+        # Send jumbo frame with gso enabled only on input interface
+        # and DF bit is set. GSO packet will be chunked into gso_size
+        # data payload
+        #
+        self.create_pg_interfaces(range(4, 5))
+        for i in self.pg_interfaces:
+            i.admin_up()
+            i.config_ip4()
+            i.config_ip6()
+            i.disable_ipv6_ra()
+            i.resolve_arp()
+            i.resolve_ndp()
+
+        p42 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) /
+               IP(src=self.pg2.remote_ip4, dst=self.pg4.remote_ip4,
+                  flags='DF') /
+               TCP(sport=1234, dport=1234) /
+               Raw('\xa5' * 65200))
+
+        rxs = self.send_and_expect(self.pg2, [p42], self.pg4, 45)
+        size = 0
+        for rx in rxs:
+            self.assertEqual(rx[Ether].src, self.pg4.local_mac)
+            self.assertEqual(rx[Ether].dst, self.pg4.remote_mac)
+            self.assertEqual(rx[IP].src, self.pg2.remote_ip4)
+            self.assertEqual(rx[IP].dst, self.pg4.remote_ip4)
+            self.assertEqual(rx[TCP].sport, 1234)
+            self.assertEqual(rx[TCP].dport, 1234)
+
+        size = rxs[44][TCP].seq + rxs[44][IP].len - 20 - 20
+        self.assertEqual(size, 65200)
+
+        #
+        # Send jumbo frame with gso enabled only on input interface
+        # and DF bit is unset. GSO packet will be fragmented.
+        #
+        self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [576, 0, 0, 0])
+
+        p43 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) /
+               IP(src=self.pg2.remote_ip4, dst=self.pg1.remote_ip4) /
+               TCP(sport=1234, dport=1234) /
+               Raw('\xa5' * 65200))
+
+        rxs = self.send_and_expect(self.pg2, [p43], self.pg1, 119)
+        size = 0
+        for rx in rxs:
+            rx.show()
+            self.assertEqual(rx[Ether].src, self.pg1.local_mac)
+            self.assertEqual(rx[Ether].dst, self.pg1.remote_mac)
+            self.assertEqual(rx[IP].src, self.pg2.remote_ip4)
+            self.assertEqual(rx[IP].dst, self.pg1.remote_ip4)
+            size += rx[IP].len - 20
+        size -= 20  # TCP header
+        self.assertEqual(size, 65200)
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)
diff --git a/test/vpp_pg_interface.py b/test/vpp_pg_interface.py
index bd4ddaff58a..e6dae66feec 100755
--- a/test/vpp_pg_interface.py
+++ b/test/vpp_pg_interface.py
@@ -46,6 +46,18 @@ class VppPGInterface(VppInterface):
         return self._pg_index
 
     @property
+    def gso_enabled(self):
+        """gso enabled on packet-generator interface"""
+        if self._gso_enabled == 0:
+            return "gso-disabled"
+        return "gso-enabled"
+
+    @property
+    def gso_size(self):
+        """gso size on packet-generator interface"""
+        return self._gso_size
+
+    @property
     def out_path(self):
         """pcap file path - captured packets"""
         return self._out_path
@@ -86,17 +98,19 @@ class VppPGInterface(VppInterface):
         self._out_history_counter += 1
         return v
 
-    def __init__(self, test, pg_index):
+    def __init__(self, test, pg_index, gso, gso_size):
         """ Create VPP packet-generator interface """
         super(VppPGInterface, self).__init__(test)
 
-        r = test.vapi.pg_create_interface(pg_index)
+        r = test.vapi.pg_create_interface(pg_index, gso, gso_size)
         self.set_sw_if_index(r.sw_if_index)
 
         self._in_history_counter = 0
         self._out_history_counter = 0
         self._out_assert_counter = 0
         self._pg_index = pg_index
+        self._gso_enabled = gso
+        self._gso_size = gso_size
         self._out_file = "pg%u_out.pcap" % self.pg_index
         self._out_path = self.test.tempdir + "/" + self._out_file
         self._in_file = "pg%u_in.pcap" % self.pg_index