6 This module exposes an XMLRPC interface that allows PlanetLab users to
7 create/destroy slivers with delegated instantiation, start and stop
8 slivers, make resource loans, and examine resource allocations. The
9 XMLRPC is provided on a localhost-only TCP port as well as via a Unix
10 domain socket that is accessible by ssh-ing into a delegate account
11 with the forward_api_calls shell.
14 import SimpleXMLRPCServer
31 from api_calls import *
33 sys.path.append("/etc/planetlab")
34 from plc_config import *
36 logger.log("api: Warning: Configuration file /etc/planetlab/plc_config.py not found", 2)
38 logger.log("api: Warning: admin slice prefix set to %s" %(PLC_SLICE_PREFIX), 2)
41 UNIX_ADDR = '/tmp/sliver_mgr.api'
43 class APIRequestHandler(SimpleXMLRPCServer.SimpleXMLRPCRequestHandler):
44 # overriding _dispatch to achieve this effect is officially deprecated,
45 # but I can't figure out how to get access to .request without
46 # duplicating SimpleXMLRPCServer code here, which is more likely to
47 # change than the deprecated behavior is to be broken
49 @database.synchronized
50 def _dispatch(self, method_name_unicode, args):
51 method_name = str(method_name_unicode)
52 try: method = api_method_dict[method_name]
54 api_method_list = api_method_dict.keys()
55 api_method_list.sort()
56 raise xmlrpclib.Fault(100, 'Invalid API method %s. Valid choices are %s' % \
57 (method_name, ', '.join(api_method_list)))
58 expected_nargs = nargs_dict[method_name]
59 if len(args) != expected_nargs:
60 raise xmlrpclib.Fault(101, 'Invalid argument count: got %d, expecting %d.' % \
61 (len(args), expected_nargs))
63 # Figure out who's calling.
64 # XXX - these ought to be imported directly from some .h file
66 sizeof_struct_ucred = 12
67 ucred = self.request.getsockopt(socket.SOL_SOCKET, SO_PEERCRED, sizeof_struct_ucred)
68 xid = struct.unpack('3i', ucred)[1]
69 caller_name = pwd.getpwuid(xid)[0]
70 # Special case the genicw
71 if caller_name == PLC_SLICE_PREFIX+"_sfacm":
72 try: result = method(*args)
73 except Exception, err: raise xmlrpclib.Fault(104, 'Error in call: %s' %err)
74 # Anyone can call these functions
75 elif method_name not in ('Help', 'Ticket', 'GetXIDs', 'GetSSHKeys'):
76 # Authenticate the caller if not in the above fncts.
77 if method_name == "GetRecord":
78 target_name = caller_name
82 # Gather target slice's object.
83 target_rec = database.db.get(target_name)
85 # only work on slivers or self. Sannity check.
86 if not (target_rec and target_rec['type'].startswith('sliver.')):
87 raise xmlrpclib.Fault(102, \
88 'Invalid argument: the first argument must be a sliver name.')
90 # only manipulate slivers who delegate you authority
91 if caller_name in (target_name, target_rec['delegations']):
92 try: result = method(target_rec, *args[1:])
93 except Exception, err: raise xmlrpclib.Fault(104, 'Error in call: %s' %err)
95 raise xmlrpclib.Fault(108, '%s: Permission denied.' % caller_name)
96 else: # Execute anonymous call.
97 try: result = method(*args)
98 except Exception, err: raise xmlrpclib.Fault(104, 'Error in call: %s' %err)
99 if result == None: result = 1
102 class APIServer_INET(SocketServer.ThreadingMixIn, SimpleXMLRPCServer.SimpleXMLRPCServer): allow_reuse_address = True
104 class APIServer_UNIX(APIServer_INET): address_family = socket.AF_UNIX
107 """Start two XMLRPC interfaces: one bound to localhost, the other bound to a Unix domain socket."""
108 serv1 = APIServer_INET(('127.0.0.1', API_SERVER_PORT), requestHandler=APIRequestHandler, logRequests=0)
109 tools.as_daemon_thread(serv1.serve_forever)
110 try: os.unlink(UNIX_ADDR)
112 if e.errno != errno.ENOENT: raise
113 serv2 = APIServer_UNIX(UNIX_ADDR, requestHandler=APIRequestHandler, logRequests=0)
114 tools.as_daemon_thread(serv2.serve_forever)
115 os.chmod(UNIX_ADDR, 0666)