70 lines
2.1 KiB
Python
Executable file
70 lines
2.1 KiB
Python
Executable file
#!/usr/bin/python -i
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# Copyright (c)2010-2013 the Boeing Company.
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# See the LICENSE file included in this distribution.
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# connect n nodes to a virtual switch/hub
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import sys, datetime, optparse
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from core import pycore
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from core.misc import ipaddr
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from core.constants import *
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# node list (count from 1)
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n = [None]
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def main():
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usagestr = "usage: %prog [-h] [options] [args]"
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parser = optparse.OptionParser(usage = usagestr)
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parser.set_defaults(numnodes = 5)
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parser.add_option("-n", "--numnodes", dest = "numnodes", type = int,
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help = "number of nodes")
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def usage(msg = None, err = 0):
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sys.stdout.write("\n")
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if msg:
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sys.stdout.write(msg + "\n\n")
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parser.print_help()
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sys.exit(err)
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# parse command line options
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(options, args) = parser.parse_args()
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if options.numnodes < 1:
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usage("invalid number of nodes: %s" % options.numnodes)
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for a in args:
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sys.stderr.write("ignoring command line argument: '%s'\n" % a)
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start = datetime.datetime.now()
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# IP subnet
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prefix = ipaddr.IPv4Prefix("10.83.0.0/16")
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session = pycore.Session(persistent=True)
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if 'server' in globals():
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server.addsession(session)
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# emulated Ethernet switch
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switch = session.addobj(cls = pycore.nodes.SwitchNode, name = "switch")
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switch.setposition(x=80,y=50)
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print "creating %d nodes with addresses from %s" % \
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(options.numnodes, prefix)
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for i in xrange(1, options.numnodes + 1):
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tmp = session.addobj(cls = pycore.nodes.CoreNode, name = "n%d" % i,
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objid=i)
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tmp.newnetif(switch, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
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tmp.cmd([SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
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tmp.setposition(x=150*i,y=150)
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n.append(tmp)
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session.node_count = str(options.numnodes + 1)
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session.instantiate()
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# start a shell on node 1
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n[1].term("bash")
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print "elapsed time: %s" % (datetime.datetime.now() - start)
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if __name__ == "__main__" or __name__ == "__builtin__":
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main()
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