[dash-flow] Test cases for DASH flow using PTF

.gitignore

@@ -12,3 +12,4 @@ dash-pipeline/bmv2/dash_pipeline.bmv2/
 dash-pipeline/dpdk-pna/dash_pipeline.dpdk
 dash-pipeline/SAI/lib/
 dash-pipeline/SAI/rpc/
+dash-pipeline/dpapp/build

test/test-cases/functional/ptf/saidashdpapp_sanity.py

@@ -289,11 +289,66 @@ def trafficTcpTest(self):
 
         print(f"{self.__class__.__name__} trafficTcpTest OK\n")
 
+    def ageoutTcpTest(self):
+
+        src_vm_ip = "10.1.1.11"
+        outer_smac = "00:00:05:06:06:07"
+        tcp_src_port = 0x1234
+        tcp_dst_port = 0x50
+
+        # customer packet: tcp SYN
+        inner_pkt = simple_tcp_packet(eth_dst="02:02:02:02:02:02",
+                                      eth_src=self.eni_mac,
+                                      ip_dst=self.dst_ca_ip,
+                                      ip_src=src_vm_ip,
+                                      tcp_sport=tcp_src_port,
+                                      tcp_dport=tcp_dst_port,
+                                      tcp_flags="S")
+        vxlan_pkt = simple_vxlan_packet(eth_dst=self.our_mac,
+                                        eth_src=outer_smac,
+                                        ip_dst=self.vip,
+                                        ip_src=self.src_vm_pa_ip,
+                                        udp_sport=11638,
+                                        with_udp_chksum=False,
+                                        vxlan_vni=self.outbound_vni,
+                                        inner_frame=inner_pkt)
+
+        inner_exp_pkt = simple_tcp_packet(eth_dst=self.dst_ca_mac,
+                                        eth_src=self.eni_mac,
+                                        ip_dst=self.dst_ca_ip,
+                                        ip_src=src_vm_ip,
+                                        tcp_sport=tcp_src_port,
+                                        tcp_dport=tcp_dst_port,
+                                        tcp_flags="S")
+        vxlan_exp_pkt = simple_vxlan_packet(eth_dst="00:00:00:00:00:00",
+                                        eth_src="00:00:00:00:00:00",
+                                        ip_dst=self.dst_pa_ip,
+                                        ip_src=self.vip,
+                                        udp_sport=0, # TODO: Fix sport in pipeline
+                                        with_udp_chksum=False,
+                                        vxlan_vni=self.vnet_vni,
+                                        inner_frame=inner_exp_pkt)
+
+        self.pkt_exp = vxlan_exp_pkt
+        print("\tSending outbound packet TCP SYN ...")
+        send_packet(self, 0, vxlan_pkt)
+        print("\tVerifying packet...")
+        verify_packet(self, self.pkt_exp, 0)
+        print("\tVerifying flow created...")
+        verify_flow(self.eni_mac, self.vnet & 0xffff, inner_pkt)
+        time.sleep(35)
+        print("\tVerifying flow aged out...")
+        verify_no_flow(self.eni_mac, self.vnet & 0xffff, inner_pkt)
+
+
+        print(f"{self.__class__.__name__} ageoutTcpTest OK\n")    
+
     def runTest(self):
 
         self.configureVnet()
         self.trafficUdpTest()
         self.trafficTcpTest()
+        self.ageoutTcpTest()
 
     def tearDown(self):