3 # Copyright (c) 2003 Intel Corporation
6 # Copyright (c) 2004-2006 The Trustees of Princeton University
11 import xml.parsers.expat
18 from Exceptions import *
22 def create_auth_structure( vars, call_params ):
24 create and return an authentication structure for a Boot API
25 call. Vars contains the boot manager runtime variables, and
26 call_params is a tuple of the parameters that will be passed to the
27 API call. Return None if unable to (typically due to missing
28 keys in vars, such as node_id or node_key)
32 auth['AuthMethod']= 'hmac'
35 auth['node_id'] = vars['NODE_ID']
36 auth['node_ip'] = vars['NETWORK_SETTINGS']['ip']
40 #params= serialize_params(call_params)
42 #msg= "[" + "".join(params) + "]"
43 #node_hmac= hmac.new(vars['NODE_KEY'], msg.encode('utf-8'), sha).hexdigest()
44 node_hmac= hmac.new(vars['NODE_KEY'], "[]".encode('utf-8'), sha).hexdigest()
45 auth['value']= node_hmac
48 auth_session['session'] = vars['API_SERVER_INST'].GetSession(auth)
49 auth_session['AuthMethod'] = 'session'
57 def serialize_params( call_params ):
59 convert a list of parameters into a format that will be used in the
60 hmac generation. both the boot manager and plc must have a common
61 format. full documentation is in the boot manager technical document,
62 but essentially we are going to take all the values (and keys for
63 dictionary objects), and put them into a list. sort them, and combine
64 them into one long string encased in a set of braces.
69 for param in call_params:
70 if isinstance(param,list) or isinstance(param,tuple):
71 values += serialize_params(param)
72 elif isinstance(param,dict):
73 values += serialize_params(param.values())
74 elif isinstance(param,xmlrpclib.Boolean):
75 # bool was not a real type in Python <2.3 and had to be
76 # marshalled as a custom type in xmlrpclib. Make sure that
77 # bools serialize consistently.
81 values.append("False")
83 values.append(unicode(param))
88 def call_api_function( vars, function, user_params ):
90 call the named api function with params, and return the
91 value to the caller. the authentication structure is handled
92 automatically, and doesn't need to be passed in with params.
94 If the call fails, a BootManagerException is raised.
99 api_server= vars['API_SERVER_INST']
101 raise BootManagerException, "No connection to the API server exists."
103 if api_server is None:
107 if i[0] == function and i[1] == user_params:
109 raise BootManagerException, \
110 "Disconnected operation failed, insufficient stash."
112 auth= create_auth_structure(vars,user_params)
114 raise BootManagerException, \
115 "Could not create auth structure, missing values."
118 params= params + user_params
121 exec( "rc= api_server.%s(*params)" % function )
124 stash += [ [ function, user_params, rc ] ]
126 except xmlrpclib.Fault, fault:
127 raise BootManagerException, "API Fault: %s" % fault
128 except xmlrpclib.ProtocolError, err:
129 raise BootManagerException,"XML RPC protocol error: %s" % err
130 except xml.parsers.expat.ExpatError, err:
131 raise BootManagerException,"XML parsing error: %s" % err
135 mntpnt = '/tmp/stash'
136 def __init__(self, vars, mode):
137 utils.makedirs(self.mntpnt)
139 utils.sysexec('mount -t auto -U %s %s' % (vars['DISCONNECTED_OPERATION'], self.mntpnt))
140 # make sure it's not read-only
141 f = file('%s/api.cache' % self.mntpnt, 'a')
143 file.__init__(self, '%s/api.cache' % self.mntpnt, mode)
145 utils.sysexec_noerr('umount %s' % self.mntpnt)
146 raise BootManagerException, "Couldn't find API-cache for disconnected operation"
150 utils.sysexec_noerr('umount %s' % self.mntpnt)
155 stash = cPickle.load(s)
160 if vars['DISCONNECTED_OPERATION']:
162 cPickle.dump(stash, s)