Final edits for SIGCOMM tutorial (#191)

* Final updates for SIGCOMM '18

* Final updates for SIGCOMM '18

exercises/ecn/receive.py

@@ -1,37 +0,0 @@
-#!/usr/bin/env python
-import sys
-import struct
-
-from scapy.all import sniff, sendp, hexdump, get_if_list, get_if_hwaddr
-from scapy.all import Packet
-from scapy.all import IP, UDP, Raw
-from scapy.layers.inet import _IPOption_HDR
-
-def get_if():
-    ifs=get_if_list()
-    iface=None
-    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 handle_pkt(pkt):
-    print "got a packet"
-    pkt.show2()
-#    hexdump(pkt)
-    sys.stdout.flush()
-
-
-def main():
-    iface = 'h2-eth0'
-    print "sniffing on %s" % iface
-    sys.stdout.flush()
-    sniff(filter="udp and port 4321", iface = iface,
-          prn = lambda x: handle_pkt(x))
-
-if __name__ == '__main__':
-    main()