1 files changed, 150 insertions, 0 deletions
diff --git a/resources/traffic_scripts/dhcp/check_dhcp_discover.py b/resources/traffic_scripts/dhcp/check_dhcp_discover.py
new file mode 100755
index 0000000000..2fdc5b7fbf
--- /dev/null
+++ b/resources/traffic_scripts/dhcp/check_dhcp_discover.py
@@ -0,0 +1,150 @@
+#!/usr/bin/env python
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Traffic script that receives an DHCP packet on given interface and check if
+is correct DHCP DISCOVER message.
+"""
+
+import sys
+
+from scapy.layers.inet import UDP_SERVICES
+
+from resources.libraries.python.PacketVerifier import RxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def main():
+    args = TrafficScriptArg(['rx_src_mac'], ['hostname'])
+
+    rx_if = args.get_arg('rx_if')
+    rx_src_mac = args.get_arg('rx_src_mac')
+    hostname = args.get_arg('hostname')
+
+    rx_dst_mac = 'ff:ff:ff:ff:ff:ff'
+    rx_src_ip = '0.0.0.0'
+    rx_dst_ip = '255.255.255.255'
+    boot_request = 1
+    dhcp_magic = 'c\x82Sc'
+
+    rxq = RxQueue(rx_if)
+
+    ether = rxq.recv(10)
+
+    if ether is None:
+        raise RuntimeError("DHCP DISCOVER Rx timeout.")
+
+    if ether.dst != rx_dst_mac:
+        raise RuntimeError("Destination MAC address error.")
+    print "Destination MAC address: OK."
+
+    if ether.src != rx_src_mac:
+        raise RuntimeError("Source MAC address error.")
+    print "Source MAC address: OK."
+
+    if ether['IP'].dst != rx_dst_ip:
+        raise RuntimeError("Destination IP address error.")
+    print "Destination IP address: OK."
+
+    if ether['IP'].src != rx_src_ip:
+        raise RuntimeError("Source IP address error.")
+    print "Source IP address: OK."
+
+    if ether['IP']['UDP'].dport != UDP_SERVICES.bootps:
+        raise RuntimeError("UDP destination port error.")
+    print "UDP destination port: OK."
+
+    if ether['IP']['UDP'].sport != UDP_SERVICES.bootpc:
+        raise RuntimeError("UDP source port error.")
+    print "UDP source port: OK."
+
+    bootp = ether['BOOTP']
+
+    if bootp.op != boot_request:
+        raise RuntimeError("BOOTP message type error.")
+    print "BOOTP message type: OK"
+
+    if bootp.ciaddr != '0.0.0.0':
+        raise RuntimeError("BOOTP client IP address error.")
+    print "BOOTP client IP address: OK"
+
+    if bootp.yiaddr != '0.0.0.0':
+        raise RuntimeError("BOOTP 'your' (client) IP address error.")
+    print "BOOTP 'your' (client) IP address: OK"
+
+    if bootp.siaddr != '0.0.0.0':
+        raise RuntimeError("BOOTP next server IP address error.")
+    print "BOOTP next server IP address: OK"
+
+    if bootp.giaddr != '0.0.0.0':
+        raise RuntimeError("BOOTP relay agent IP address error.")
+    print "BOOTP relay agent IP address: OK"
+
+    chaddr = bootp.chaddr[:bootp.hlen].encode('hex')
+    if chaddr != rx_src_mac.replace(':', ''):
+        raise RuntimeError("BOOTP client hardware address error.")
+    print "BOOTP client hardware address: OK"
+
+    # Check hostname
+    if bootp.sname != 64*'\x00':
+        raise RuntimeError("BOOTP server name error.")
+    print "BOOTP server name: OK"
+
+    # Check boot file
+    if bootp.file != 128*'\x00':
+        raise RuntimeError("BOOTP boot file name error.")
+    print "BOOTP boot file name: OK"
+
+    # Check bootp magic
+    if bootp.options != dhcp_magic:
+        raise RuntimeError("DHCP magic error.")
+    print "DHCP magic: OK"
+
+    # Check options
+    dhcp_options = ether['DHCP options'].options
+
+    # Option 12
+    hn = filter(lambda x: x[0] == 'hostname', dhcp_options)
+    if hostname:
+        try:
+            if hn[0][1] != hostname:
+                raise RuntimeError("Client's hostname doesn't match.")
+        except IndexError:
+            raise RuntimeError("Option list doesn't contain hostname option.")
+    else:
+        if len(hn) != 0:
+            raise RuntimeError("Option list contains hostname option.")
+    print "Option 12 hostname: OK"
+
+    # Option 53
+    mt = filter(lambda x: x[0] == 'message-type', dhcp_options)[0][1]
+    if mt != 1:
+        raise RuntimeError("Option 53 message-type error.")
+    print "Option 53 message-type: OK"
+
+    # Option 55
+    prl = filter(lambda x: x[0] == 'param_req_list', dhcp_options)[0][1]
+    if prl != '\x01\x1c\x02\x03\x0f\x06w\x0c,/\x1ay*':
+        raise RuntimeError("Option 55 param_req_list error.")
+    print "Option 55 param_req_list: OK"
+
+    # Option 255
+    if 'end' not in dhcp_options:
+        raise RuntimeError("end option error.")
+    print "end option: OK"
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()