diff options
Diffstat (limited to 'test/test_mss_clamp.py')
| -rw-r--r-- | test/test_mss_clamp.py | 228 |
1 files changed, 147 insertions, 81 deletions
diff --git a/test/test_mss_clamp.py b/test/test_mss_clamp.py index 23495b6050b..663ecd37742 100644 --- a/test/test_mss_clamp.py +++ b/test/test_mss_clamp.py @@ -11,7 +11,7 @@ from scapy.packet import Raw class TestMSSClamp(VppTestCase): - """ TCP MSS Clamping Test Case """ + """TCP MSS Clamping Test Case""" def setUp(self): super(TestMSSClamp, self).setUp() @@ -40,31 +40,34 @@ class TestMSSClamp(VppTestCase): tcp_csum = tcp.chksum del tcp.chksum ip_csum = 0 - if (rx.haslayer(IP)): + if rx.haslayer(IP): ip_csum = rx[IP].chksum del rx[IP].chksum opt = tcp.options - self.assertEqual(opt[0][0], 'MSS') + self.assertEqual(opt[0][0], "MSS") self.assertEqual(opt[0][1], expected_mss) # recalculate checksums rx = rx.__class__(bytes(rx)) tcp = rx[TCP] self.assertEqual(tcp_csum, tcp.chksum) - if (rx.haslayer(IP)): + if rx.haslayer(IP): self.assertEqual(ip_csum, rx[IP].chksum) def send_and_verify_ip4(self, src_pg, dst_pg, mss, expected_mss): # IPv4 TCP packet with the requested MSS option. # from a host on src_pg to a host on dst_pg. - p = (Ether(dst=src_pg.local_mac, - src=src_pg.remote_mac) / - IP(src=src_pg.remote_ip4, - dst=dst_pg.remote_ip4) / - TCP(sport=1234, dport=1234, - flags="S", - options=[('MSS', (mss)), ('EOL', None)]) / - Raw('\xa5' * 100)) + p = ( + Ether(dst=src_pg.local_mac, src=src_pg.remote_mac) + / IP(src=src_pg.remote_ip4, dst=dst_pg.remote_ip4) + / TCP( + sport=1234, + dport=1234, + flags="S", + options=[("MSS", (mss)), ("EOL", None)], + ) + / Raw("\xa5" * 100) + ) rxs = self.send_and_expect(src_pg, p * 65, dst_pg) @@ -76,14 +79,17 @@ class TestMSSClamp(VppTestCase): # IPv6 TCP packet with the requested MSS option. # from a host on src_pg to a host on dst_pg. # - p = (Ether(dst=src_pg.local_mac, - src=src_pg.remote_mac) / - IPv6(src=src_pg.remote_ip6, - dst=dst_pg.remote_ip6) / - TCP(sport=1234, dport=1234, - flags="S", - options=[('MSS', (mss)), ('EOL', None)]) / - Raw('\xa5' * 100)) + p = ( + Ether(dst=src_pg.local_mac, src=src_pg.remote_mac) + / IPv6(src=src_pg.remote_ip6, dst=dst_pg.remote_ip6) + / TCP( + sport=1234, + dport=1234, + flags="S", + options=[("MSS", (mss)), ("EOL", None)], + ) + / Raw("\xa5" * 100) + ) rxs = self.send_and_expect(src_pg, p * 65, dst_pg) @@ -91,12 +97,16 @@ class TestMSSClamp(VppTestCase): self.verify_pkt(rx, expected_mss) def test_tcp_mss_clamping_ip4_tx(self): - """ IP4 TCP MSS Clamping TX """ + """IP4 TCP MSS Clamping TX""" # enable the TCP MSS clamping feature to lower the MSS to 1424. - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1424, ipv6_mss=0, - ipv4_direction=3, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1424, + ipv6_mss=0, + ipv4_direction=3, + ipv6_direction=0, + ) # Verify that the feature is enabled. rv, reply = self.vapi.mss_clamp_get(sw_if_index=self.pg1.sw_if_index) @@ -107,8 +117,7 @@ class TestMSSClamp(VppTestCase): self.send_and_verify_ip4(self.pg0, self.pg1, 1460, 1424) # check the stats - stats = self.statistics.get_counter( - '/err/tcp-mss-clamping-ip4-out/clamped') + stats = self.statistics.get_counter("/err/tcp-mss-clamping-ip4-out/clamped") self.assertEqual(sum(stats), 65) # Send syn packets with small enough MSS values and verify they are @@ -117,36 +126,52 @@ class TestMSSClamp(VppTestCase): # enable the the feature only in TX direction # and change the max MSS value - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1420, ipv6_mss=0, - ipv4_direction=2, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1420, + ipv6_mss=0, + ipv4_direction=2, + ipv6_direction=0, + ) # Send syn packets and verify that the MSS value is lowered. self.send_and_verify_ip4(self.pg0, self.pg1, 1460, 1420) # enable the the feature only in RX direction - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1424, ipv6_mss=0, - ipv4_direction=1, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1424, + ipv6_mss=0, + ipv4_direction=1, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip4(self.pg0, self.pg1, 1460, 1460) # disable the feature - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=0, - ipv4_direction=0, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=0, + ipv4_direction=0, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip4(self.pg0, self.pg1, 1460, 1460) def test_tcp_mss_clamping_ip4_rx(self): - """ IP4 TCP MSS Clamping RX """ + """IP4 TCP MSS Clamping RX""" # enable the TCP MSS clamping feature to lower the MSS to 1424. - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1424, ipv6_mss=0, - ipv4_direction=3, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1424, + ipv6_mss=0, + ipv4_direction=3, + ipv6_direction=0, + ) # Verify that the feature is enabled. rv, reply = self.vapi.mss_clamp_get(sw_if_index=self.pg1.sw_if_index) @@ -157,8 +182,7 @@ class TestMSSClamp(VppTestCase): self.send_and_verify_ip4(self.pg1, self.pg0, 1460, 1424) # check the stats - stats = self.statistics.get_counter( - '/err/tcp-mss-clamping-ip4-in/clamped') + stats = self.statistics.get_counter("/err/tcp-mss-clamping-ip4-in/clamped") self.assertEqual(sum(stats), 65) # Send syn packets with small enough MSS values and verify they are @@ -167,36 +191,52 @@ class TestMSSClamp(VppTestCase): # enable the the feature only in RX direction # and change the max MSS value - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1420, ipv6_mss=0, - ipv4_direction=1, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1420, + ipv6_mss=0, + ipv4_direction=1, + ipv6_direction=0, + ) # Send syn packets and verify that the MSS value is lowered. self.send_and_verify_ip4(self.pg1, self.pg0, 1460, 1420) # enable the the feature only in TX direction - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=1424, ipv6_mss=0, - ipv4_direction=2, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=1424, + ipv6_mss=0, + ipv4_direction=2, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip4(self.pg1, self.pg0, 1460, 1460) # disable the feature - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=0, - ipv4_direction=0, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=0, + ipv4_direction=0, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip4(self.pg1, self.pg0, 1460, 1460) def test_tcp_mss_clamping_ip6_tx(self): - """ IP6 TCP MSS Clamping TX """ + """IP6 TCP MSS Clamping TX""" # enable the TCP MSS clamping feature to lower the MSS to 1424. - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1424, - ipv4_direction=0, ipv6_direction=3) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1424, + ipv4_direction=0, + ipv6_direction=3, + ) # Verify that the feature is enabled. rv, reply = self.vapi.mss_clamp_get(sw_if_index=self.pg1.sw_if_index) @@ -207,8 +247,7 @@ class TestMSSClamp(VppTestCase): self.send_and_verify_ip6(self.pg0, self.pg1, 1460, 1424) # check the stats - stats = self.statistics.get_counter( - '/err/tcp-mss-clamping-ip6-out/clamped') + stats = self.statistics.get_counter("/err/tcp-mss-clamping-ip6-out/clamped") self.assertEqual(sum(stats), 65) # Send syn packets with small enough MSS values and verify they are @@ -217,36 +256,52 @@ class TestMSSClamp(VppTestCase): # enable the the feature only in TX direction # and change the max MSS value - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1420, - ipv4_direction=0, ipv6_direction=2) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1420, + ipv4_direction=0, + ipv6_direction=2, + ) # Send syn packets and verify that the MSS value is lowered. self.send_and_verify_ip6(self.pg0, self.pg1, 1460, 1420) # enable the the feature only in RX direction - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1424, - ipv4_direction=0, ipv6_direction=1) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1424, + ipv4_direction=0, + ipv6_direction=1, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip6(self.pg0, self.pg1, 1460, 1460) # disable the feature - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=0, - ipv4_direction=0, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=0, + ipv4_direction=0, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip6(self.pg0, self.pg1, 1460, 1460) def test_tcp_mss_clamping_ip6_rx(self): - """ IP6 TCP MSS Clamping RX """ + """IP6 TCP MSS Clamping RX""" # enable the TCP MSS clamping feature to lower the MSS to 1424. - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1424, - ipv4_direction=0, ipv6_direction=3) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1424, + ipv4_direction=0, + ipv6_direction=3, + ) # Verify that the feature is enabled. rv, reply = self.vapi.mss_clamp_get(sw_if_index=self.pg1.sw_if_index) @@ -257,8 +312,7 @@ class TestMSSClamp(VppTestCase): self.send_and_verify_ip6(self.pg1, self.pg0, 1460, 1424) # check the stats - stats = self.statistics.get_counter( - '/err/tcp-mss-clamping-ip6-in/clamped') + stats = self.statistics.get_counter("/err/tcp-mss-clamping-ip6-in/clamped") self.assertEqual(sum(stats), 65) # Send syn packets with small enough MSS values and verify they are @@ -267,29 +321,41 @@ class TestMSSClamp(VppTestCase): # enable the the feature only in RX direction # and change the max MSS value - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1420, - ipv4_direction=0, ipv6_direction=1) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1420, + ipv4_direction=0, + ipv6_direction=1, + ) # Send syn packets and verify that the MSS value is lowered. self.send_and_verify_ip6(self.pg1, self.pg0, 1460, 1420) # enable the the feature only in TX direction - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=1424, - ipv4_direction=0, ipv6_direction=2) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=1424, + ipv4_direction=0, + ipv6_direction=2, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip6(self.pg1, self.pg0, 1460, 1460) # disable the feature - self.vapi.mss_clamp_enable_disable(self.pg1.sw_if_index, - ipv4_mss=0, ipv6_mss=0, - ipv4_direction=0, ipv6_direction=0) + self.vapi.mss_clamp_enable_disable( + self.pg1.sw_if_index, + ipv4_mss=0, + ipv6_mss=0, + ipv4_direction=0, + ipv6_direction=0, + ) # Send the packets again and ensure they are unchanged. self.send_and_verify_ip6(self.pg1, self.pg0, 1460, 1460) -if __name__ == '__main__': +if __name__ == "__main__": unittest.main(testRunner=VppTestRunner) |