481daf4c0d
note that due to the usage of the 'server' global, it will not work to add a Session.add_to_server() or core.misc.utils.add_to_server() function (Boeing r1828)
99 lines
3.1 KiB
Python
Executable file
99 lines
3.1 KiB
Python
Executable file
#!/usr/bin/python
|
|
|
|
# Copyright (c)2013 the Boeing Company.
|
|
# See the LICENSE file included in this distribution.
|
|
|
|
# This script creates a CORE session, that will connect n nodes together
|
|
# in a chain, with static routes between nodes
|
|
# number of nodes / number of hops
|
|
# 2 0
|
|
# 3 1
|
|
# 4 2
|
|
# n n - 2
|
|
#
|
|
# Use core-cleanup to clean up after this script as the session is left running.
|
|
#
|
|
|
|
import sys, datetime, optparse
|
|
|
|
from core import pycore
|
|
from core.misc import ipaddr
|
|
from core.constants import *
|
|
|
|
# node list (count from 1)
|
|
n = [None]
|
|
|
|
def main():
|
|
usagestr = "usage: %prog [-h] [options] [args]"
|
|
parser = optparse.OptionParser(usage = usagestr)
|
|
parser.set_defaults(numnodes = 5)
|
|
|
|
parser.add_option("-n", "--numnodes", dest = "numnodes", type = int,
|
|
help = "number of nodes")
|
|
|
|
def usage(msg = None, err = 0):
|
|
sys.stdout.write("\n")
|
|
if msg:
|
|
sys.stdout.write(msg + "\n\n")
|
|
parser.print_help()
|
|
sys.exit(err)
|
|
|
|
# parse command line options
|
|
(options, args) = parser.parse_args()
|
|
|
|
if options.numnodes < 1:
|
|
usage("invalid number of nodes: %s" % options.numnodes)
|
|
|
|
if options.numnodes >= 255:
|
|
usage("invalid number of nodes: %s" % options.numnodes)
|
|
|
|
for a in args:
|
|
sys.stderr.write("ignoring command line argument: '%s'\n" % a)
|
|
|
|
start = datetime.datetime.now()
|
|
|
|
session = pycore.Session(persistent=True)
|
|
if 'server' in globals():
|
|
server.addsession(session)
|
|
print "creating %d nodes" % options.numnodes
|
|
left = None
|
|
prefix = None
|
|
for i in xrange(1, options.numnodes + 1):
|
|
tmp = session.addobj(cls = pycore.nodes.CoreNode, name = "n%d" % i,
|
|
objid=i)
|
|
if left:
|
|
tmp.newnetif(left, ["%s/%s" % (prefix.addr(2), prefix.prefixlen)])
|
|
|
|
prefix = ipaddr.IPv4Prefix("10.83.%d.0/24" % i) # limit: i < 255
|
|
right = session.addobj(cls = pycore.nodes.PtpNet)
|
|
tmp.newnetif(right, ["%s/%s" % (prefix.addr(1), prefix.prefixlen)])
|
|
tmp.cmd([SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
|
|
tmp.cmd([SYSCTL_BIN, "net.ipv4.conf.all.forwarding=1"])
|
|
tmp.cmd([SYSCTL_BIN, "net.ipv4.conf.default.rp_filter=0"])
|
|
tmp.setposition(x=100*i,y=150)
|
|
n.append(tmp)
|
|
left = right
|
|
|
|
prefixes = map(lambda(x): ipaddr.IPv4Prefix("10.83.%d.0/24" % x),
|
|
xrange(1, options.numnodes + 1))
|
|
|
|
# set up static routing in the chain
|
|
for i in xrange(1, options.numnodes + 1):
|
|
for j in xrange(1, options.numnodes + 1):
|
|
if j < i - 1:
|
|
gw = prefixes[i-2].addr(1)
|
|
elif j > i:
|
|
if i > len(prefixes) - 1:
|
|
continue
|
|
gw = prefixes[i-1].addr(2)
|
|
else:
|
|
continue
|
|
net = prefixes[j-1]
|
|
n[i].cmd([IP_BIN, "route", "add", str(net), "via", str(gw)])
|
|
|
|
|
|
print "elapsed time: %s" % (datetime.datetime.now() - start)
|
|
|
|
if __name__ == "__main__" or __name__ == "__builtin__":
|
|
main()
|
|
|