4 from sfa.util.faults import *
5 from sfa.util.method import Method
6 from sfa.util.parameter import Parameter, Mixed
7 from sfa.trust.auth import Auth
8 from sfa.util.config import Config
9 from sfa.trust.credential import Credential
10 from sfa.util.genitable import GeniTable
11 from sfa.util.sfaticket import SfaTicket
12 from sfa.plc.slices import Slices
13 from sfatables.runtime import SFATablesRules
14 from sfa.util.rspec import *
16 class get_ticket(Method):
18 Retrieve a ticket. This operation is currently implemented on PLC
19 only (see SFA, engineering decisions); it is not implemented on
22 The ticket is filled in with information from the PLC database. This
23 information includes resources, and attributes such as user keys and
26 @param cred credential string
27 @param name name of the slice to retrieve a ticket for
28 @param rspec resource specification dictionary
30 @return the string representation of a ticket object
33 interfaces = ['aggregate', 'slicemgr']
36 Parameter(str, "Credential string"),
37 Parameter(str, "Human readable name of slice to retrive a ticket for (hrn)"),
38 Parameter(str, "Resource specification (rspec)"),
39 Mixed(Parameter(str, "Request hash"),
40 Parameter(None, "Request hash not specified"))
43 returns = Parameter(str, "String represeneation of a ticket object")
45 def call(self, cred, hrn, rspec, request_hash=None):
46 self.api.auth.authenticateCred(cred, [cred, hrn, rspec], request_hash)
47 self.api.auth.check(cred, "getticket")
48 self.api.auth.verify_object_belongs_to_me(hrn)
49 self.api.auth.verify_object_permission(hrn)
51 # set the right outgoing rules
52 manager_base = 'sfa.managers'
53 if self.api.interface in ['aggregate']:
54 outgoing_rules = SFATablesRules('OUTGOING')
55 mgr_type = self.api.config.SFA_AGGREGATE_TYPE
56 manager_module = manager_base + ".aggregate_manager_%s" % mgr_type
57 manager = __import__(manager_module, fromlist=[manager_base])
58 elif self.api.interface in ['slicemgr']:
59 outgoing_rules = SFATablesRules('FORWARD-OUTGOING')
60 mgr_type = self.api.config.SFA_SM_TYPE
61 manager_module = manager_base + ".slice_manager_%s" % mgr_type
62 manager = __import__(manager_module, fromlist=[manager_base])
64 # Filter the incoming rspec using sfatables
65 incoming_rules = SFATablesRules('INCOMING')
66 #incoming_rules.set_slice(hrn) # This is a temporary kludge. Eventually, we'd like to fetch the context requested by the match/target
67 contexts = incoming_rules.contexts
68 caller_hrn = Credential(string=cred).get_gid_caller().get_hrn()
69 request_context = manager.fetch_context(hrn, caller_hrn, contexts)
70 incoming_rules.set_context(request_context)
71 rspec = incoming_rules.apply(rspec)
72 # remove nodes that are not available at this interface from the rspec
73 valid_rspec = RSpec(xml=manager.get_rspec(self.api))
74 valid_nodes = valid_rspec.getDictsByTagName('NodeSpec')
75 valid_hostnames = [node['name'] for node in valid_nodes]
76 rspec_object = RSpec(xml=rspec)
77 rspec_object.filter(tagname='NodeSpec', attribute='name', whitelist=valid_hostnames)
78 rspec = rspec_object.toxml()
79 ticket = manager.get_ticket(self.api, hrn, rspec)