1 """Utility for running several play.py utilities in parallel.
3 Only a subset of play.py functionality is fully supported.
4 Notably, listening play.py is not tested yet.
6 Only one hardcoded strategy is there to distinguish peers.
7 File play.py is to be present in current working directory.
9 It needs to be run with sudo-able user when you want to use ports below 1024
13 # Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
15 # This program and the accompanying materials are made available under the
16 # terms of the Eclipse Public License v1.0 which accompanies this distribution,
17 # and is available at http://www.eclipse.org/legal/epl-v10.html
19 __author__ = "Vratko Polak"
20 __copyright__ = "Copyright(c) 2015, Cisco Systems, Inc."
21 __license__ = "Eclipse Public License v1.0"
22 __email__ = "vrpolak@cisco.com"
27 import multiprocessing
32 """Use argparse to get arguments, return mgr_args object."""
34 parser = argparse.ArgumentParser()
35 # TODO: Should we use --argument-names-with-spaces?
36 str_help = "Autonomous System number use in the stream (current default as in ODL: 64496)."
37 parser.add_argument("--asnumber", default=64496, type=int, help=str_help)
38 # FIXME: We are acting as iBGP peer, we should mirror AS number from peer's open message.
39 str_help = "Amount of IP prefixes to generate. Negative number is taken as an overflown positive."
40 parser.add_argument("--amount", default="1", type=int, help=str_help)
41 str_help = "The first IPv4 prefix to announce, given as numeric IPv4 address."
42 parser.add_argument("--firstprefix", default="8.0.1.0", type=ipaddr.IPv4Address, help=str_help)
43 str_help = "If present, this tool will be listening for connection, instead of initiating it."
44 parser.add_argument("--listen", action="store_true", help=str_help)
45 str_help = "How many play.py utilities are to be started."
46 parser.add_argument("--multiplicity", default="1", type=int, help=str_help)
47 str_help = "Numeric IP Address to bind to and derive BGP ID from, for the first player."
48 parser.add_argument("--myip", default="0.0.0.0", type=ipaddr.IPv4Address, help=str_help)
49 str_help = "TCP port to bind to when listening or initiating connection."
50 parser.add_argument("--myport", default="0", type=int, help=str_help)
51 str_help = "The IP of the next hop to be placed into the update messages."
52 parser.add_argument("--nexthop", default="192.0.2.1", type=ipaddr.IPv4Address, dest="nexthop", help=str_help)
53 str_help = "Numeric IP Address to try to connect to. Currently no effect in listening mode."
54 parser.add_argument("--peerip", default="127.0.0.2", type=ipaddr.IPv4Address, help=str_help)
55 str_help = "TCP port to try to connect to. No effect in listening mode."
56 parser.add_argument("--peerport", default="179", type=int, help=str_help)
57 # TODO: The step between IP prefixes is currently hardcoded to 16. Should we make it configurable?
58 # Yes, the argument list above is sorted alphabetically.
59 mgr_args = parser.parse_args()
60 # TODO: Are sanity checks (such as asnumber>=0) required?
62 if mgr_args.multiplicity < 1:
63 print "Multiplicity", mgr_args.multiplicity, "is not positive."
65 amount_left = mgr_args.amount
66 utils_left = mgr_args.multiplicity
67 prefix_current = mgr_args.firstprefix
68 myip_current = mgr_args.myip
71 amount_per_util = (amount_left - 1) / utils_left + 1 # round up
72 amount_left -= amount_per_util
74 util_args = ["python", "play.py"]
75 util_args.extend(["--asnumber", str(mgr_args.asnumber)])
76 util_args.extend(["--amount", str(amount_per_util)])
77 util_args.extend(["--firstprefix", str(prefix_current)])
79 util_args.append("--listen")
80 util_args.extend(["--myip", str(myip_current)])
81 util_args.extend(["--myport", str(mgr_args.myport)])
82 util_args.extend(["--nexthop", str(mgr_args.nexthop)])
83 util_args.extend(["--peerip", str(mgr_args.peerip)])
84 util_args.extend(["--peerport", str(mgr_args.peerport)])
85 process = multiprocessing.Process(target=subprocess.call, args=[util_args])
86 # No shell, inherited std* file descriptors, same process group, so gets SIGINT.
87 processes.append(process)
90 prefix_current += amount_per_util * 16
92 for process in processes:
94 # Usually processes run until SIGINT, but if an error happens we want to exit quickly.
95 for process in processes:
99 if __name__ == "__main__":