Adding P4D2_2018_East Folder (#116)

* Copying P4D2 Fall 2017 into P4D2 2018 East.

* Updated P4D2_2018_East VM.  Added vagrant URL workaround, cdrom to VM.  Updated to latest commits of BMV2, p4c, PI.  Known issue with p4runtime exercise.

* Applied patch from @antoninbas in  and updated solution

P4D2_2018_East/exercises/basic_tunnel/send.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+import argparse
+import sys
+import socket
+import random
+import struct
+import argparse
+
+from scapy.all import sendp, send, get_if_list, get_if_hwaddr, hexdump
+from scapy.all import Packet
+from scapy.all import Ether, IP, UDP, TCP
+from myTunnel_header import MyTunnel
+
+def get_if():
+    ifs=get_if_list()
+    iface=None # "h1-eth0"
+    for i in get_if_list():
+        if "eth0" in i:
+            iface=i
+            break;
+    if not iface:
+        print "Cannot find eth0 interface"
+        exit(1)
+    return iface
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('ip_addr', type=str, help="The destination IP address to use")
+    parser.add_argument('message', type=str, help="The message to include in packet")
+    parser.add_argument('--dst_id', type=int, default=None, help='The myTunnel dst_id to use, if unspecified then myTunnel header will not be included in packet')
+    args = parser.parse_args()
+
+    addr = socket.gethostbyname(args.ip_addr)
+    dst_id = args.dst_id
+    iface = get_if()
+
+    if (dst_id is not None):
+        print "sending on interface {} to dst_id {}".format(iface, str(dst_id))
+        pkt =  Ether(src=get_if_hwaddr(iface), dst='ff:ff:ff:ff:ff:ff')
+        pkt = pkt / MyTunnel(dst_id=dst_id) / IP(dst=addr) / args.message
+    else:
+        print "sending on interface {} to IP addr {}".format(iface, str(addr))
+        pkt =  Ether(src=get_if_hwaddr(iface), dst='ff:ff:ff:ff:ff:ff')
+        pkt = pkt / IP(dst=addr) / TCP(dport=1234, sport=random.randint(49152,65535)) / args.message
+
+    pkt.show2()
+#    hexdump(pkt)
+#    print "len(pkt) = ", len(pkt)
+    sendp(pkt, iface=iface, verbose=False)
+
+
+if __name__ == '__main__':
+    main()