+#
+# vsys_vnet_admin.py - basic command-line client to show assigned network
+# segments to the vsys_vnet tag in PlanetLab, and to assign new vsys_vnet tags
+# using available segments
+#
+# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
+#
+
+import ipaddr
+from optparse import OptionParser
+import os
+import pprint
+import sys
+import xmlrpclib
+
+def plapi(url):
+ """ Returns a XMLRPC proxy to the PLAPI service on the given url """
+ return xmlrpclib.ServerProxy(url, allow_none = True)
+
+def get_assigned(plapi, auth):
+ """ Returns a dictionary with the assigned network segments as key
+ and the slice name as value"""
+ info = plapi.GetSliceTags(auth, {'tagname': 'vsys_vnet'}, ('name', 'value'))
+ return dict((d['value'], d['name']) for d in info)
+
+def get_next_available(assigned, base, prefix):
+ """ Returns the next available network segment to be assigned to a
+ new vsys_vnet tag """
+ net = ipaddr.IPNetwork(base)
+ iter_sub = net.iter_subnets(new_prefix=prefix)
+
+ print assigned
+ try:
+ while True:
+ sub = iter_sub.next()
+ print sub
+ if not [ s for s in map(ipaddr.IPNetwork, assigned.keys()) \
+ if sub == s or s in sub or sub in s]:
+ return sub.exploded
+ except StopIteration:
+ pass
+
+ return None
+
+def assign_vsys_vent(plapi, auth, vsys_vnet, pl_slice):
+ return plapi.AddSliceTag(auth, pl_slice, 'vsys_vnet', vsys_vnet)
+
+if __name__ == "__main__":
+ pl_user = os.environ.get('PL_USER')
+ pl_pwd = os.environ.get('PL_PASS')
+ pl_url = "https://www.planet-lab.eu:443/PLCAPI/"
+ pl_slice = os.environ.get('PL_SLICE')
+
+ usage = "usage: %prog -u <user> -p <password> -l <url> --show --assign -b <base_address> -n <prefix>"
+ parser = OptionParser(usage=usage)
+ parser.add_option("-u", "--user", dest="pl_user", help="PlanetLab account user name", default=pl_user)
+ parser.add_option("-p", "--password", dest="pl_pwd", help="PlanetLab account password", default=pl_pwd)
+ parser.add_option("-l", "--url", dest="pl_url", help="PlanetLab XMLRPC url", default=pl_url)
+ parser.add_option("-b", "--base", dest="basenet", help="Base network address to perform assignment (defaults to 10.0.0.0/8)", default="10.0.0.0/8")
+ parser.add_option("-n", "--prefix", dest="prefix", help="Network prefix for segments (defaults to 21)", default = "21")
+ parser.add_option("-s", "--show", action="store_false", dest="show", default=True,
+ help="Show all assigned vsys_vnet tags")
+ parser.add_option("-a", "--assign", action="store_true", dest="assign", default=False,
+ help="Assign next available network segment as a vsys_vnet tag to the user slice")
+
+ (options, args) = parser.parse_args()
+
+ if not options.pl_user or not options.pl_pwd:
+ print "Error: PlanetLab user and password are required to proceed."
+ sys.exit(1)
+
+ api = plapi(options.pl_url)
+
+ auth = dict(AuthMethod='password', Username=options.pl_user, AuthString=options.pl_pwd)
+ assigned = get_assigned(api, auth)
+
+ if options.assign:
+ vsys_vnet = get_next_available(assigned, options.basenet, int(options.prefix))
+ if not vsys_vnet:
+ print "Error: There are no available network segments at the moment to assign"
+ sys.exit(1)
+
+ print "The next available network segment is %s." % vsys_vnet
+ proceed = raw_input ("Do you wish to proceed with the assignment of the vsys_vnet tag? [y/N] ")
+ if proceed.lower() in ['yes', 'y']:
+ if not pl_slice:
+ pl_slice = raw_input ("Please, enter your slice name \n")
+
+ if pl_slice in assigned.values():
+ print "Error: This slice already has a tag vsys_vnet assigned!!!"
+ sys.exit(1)
+
+ slice_tag_id = assign_vsys_vent(api, auth, vsys_vnet, pl_slice)
+
+ if slice_tag_id and slice_tag_id > 0:
+ print "Success: the new slice tag id is %d" % slice_tag_id
+ else:
+ print "Error: Something wrong happened!"
+
+ else:
+ pp = pprint.PrettyPrinter(indent=4)
+ pp.pprint(assigned)
+
+
+