Porting PicoTCP WIP

kernel/picotcp/test/python/multicast_send.py

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+#!/usr/bin/python
+#
+# multicast_send.py
+#
+# Multicast test with PicoTCP sending and Linux receiving
+#
+# (sender)                         (Receiver)
+# PicoTCP ------------------------ Linux
+#            mcast to 224.7.7.7
+#
+
+from  topology import *
+import socket, random, string, struct
+
+IF_ADDR = '172.16.1.1'
+LINK_ADDR = '172.16.1.2'
+MCAST_ADDR = '224.7.7.7'
+LISTEN_PORT = 6667
+SENDTO_PORT = 6667
+MCASTSEND = "mcastsend:" + str(LINK_ADDR) + ":" + str(MCAST_ADDR) + ":" + str(SENDTO_PORT) + ":" + str(LISTEN_PORT)
+
+print MCASTSEND
+
+T = Topology()
+net1 = Network(T, "pyt0")
+h1 = Host(T, net1, args=MCASTSEND)
+
+s_udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+s_udp.bind((MCAST_ADDR, LISTEN_PORT))
+s_udp.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+s_udp.settimeout(5);
+
+mreq = struct.pack("=4s4s", socket.inet_aton(str(MCAST_ADDR)), socket.inet_aton(str(IF_ADDR)))
+s_udp.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
+
+raw_input("Press enter to continue ...")
+start(T)
+sleep(1)
+
+while True:
+  data = s_udp.recv(4096)
+  #print data
+  if 'end' in data:
+    print '\n\n'
+    print '+++++++++++++++++++++++++++++++++++++++++++++'
+    print '+++++ multicast_send test IS successful +++++'
+    print '+++++++++++++++++++++++++++++++++++++++++++++'
+    print '\n\n'
+    cleanup()
+    exit(0)
+
+print '\n\n'
+print '+++++++++++++++++++++++++++++++++++++++++++++'
+print '+++++ multicast_send test NOT successful ++++'
+print '+++++++++++++++++++++++++++++++++++++++++++++'
+print '\n\n'
+cleanup()
+exit(1)