Final edits for SIGCOMM tutorial (#191)

* Final updates for SIGCOMM '18

* Final updates for SIGCOMM '18

exercises/ecn/send.py

@@ -1,50 +0,0 @@
-#!/usr/bin/env python
-
-import argparse
-import sys
-import socket
-import random
-import struct
-
-from scapy.all import sendp, send, hexdump, get_if_list, get_if_hwaddr
-from scapy.all import Packet, IPOption
-from scapy.all import Ether, IP, UDP
-from scapy.all import IntField, FieldListField, FieldLenField, ShortField
-from scapy.layers.inet import _IPOption_HDR
-
-from time import sleep
-
-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():
-
-    if len(sys.argv)<4:
-        print 'pass 2 arguments: <destination> "<message>" <duration>'
-        exit(1)
-
-    addr = socket.gethostbyname(sys.argv[1])
-    iface = get_if()
-
-    pkt = Ether(src=get_if_hwaddr(iface), dst="ff:ff:ff:ff:ff:ff") / IP(dst=addr, tos=1) / UDP(dport=4321, sport=1234) / sys.argv[2]
-    pkt.show2()
-    #hexdump(pkt)
-    try:
-      for i in range(int(sys.argv[3])):
-        sendp(pkt, iface=iface)
-        sleep(1)
-    except KeyboardInterrupt:
-        raise
-
-
-if __name__ == '__main__':
-    main()