1 files changed, 32 insertions, 0 deletions
diff --git a/tests/data_plane/vpp_lite_topo/scripts/dhcp_server.py b/tests/data_plane/vpp_lite_topo/scripts/dhcp_server.py
new file mode 100644
index 0000000..cd6f43e
--- /dev/null
+++ b/tests/data_plane/vpp_lite_topo/scripts/dhcp_server.py
@@ -0,0 +1,32 @@
+from scapy.all import *
+from scapy.layers import *
+
+server_ip="6.0.2.2"
+client_ip="6.0.1.2"
+server_mac="00:0B:CD:AE:9F:C6"
+client_mac="aa:a2:a5:ea:54:20"
+subnet_mask="255.255.255.0"
+gateway="6.0.1.1"
+
+# suboption 1 Agent circuit ID; len:4; val:0x00000001
+# suboption 5 Link selection; len:4; val:6.0.1.1
+option82 = '\x01\x04\x00\x00\x00\x01\x05\x04\x06\00\x01\x01'
+
+def detect_dhcp(pkt):
+  # check if we get DHCP discover and send offer message
+  if pkt[DHCP] and pkt[DHCP].options[0][1] == 1:
+    sendp(Ether(src=server_mac,dst="ff:ff:ff:ff:ff:ff")/
+          IP(src=server_ip,dst="6.0.1.1")/
+          UDP(sport=67,dport=68)/
+          BOOTP(op=2, yiaddr=client_ip, siaddr=server_ip, giaddr=gateway,
+                chaddr=client_mac, xid=pkt[BOOTP].xid)/
+          DHCP(options=[('message_type', 'offer')])/
+          DHCP(options=[('subnet_mask',subnet_mask)])/
+          DHCP(options=[('server_id',server_ip)])/
+          DHCP(options=[('relay_agent_Information', option82), ('end')]))
+
+#sniff DHCP requests
+def start():
+    sniff(filter="udp and (port 67 or 68)", prn=detect_dhcp, store=0)
+
+start()