2 # Functions for interacting with the nodenetworks table in the database
4 # Mark Huang <mlhuang@cs.princeton.edu>
5 # Copyright (C) 2006 The Trustees of Princeton University
7 # $Id: NodeNetworks.py,v 1.17 2007/05/11 20:22:55 tmack Exp $
10 from types import StringTypes
14 from PLC.Faults import *
15 from PLC.Parameter import Parameter
16 from PLC.Filter import Filter
17 from PLC.Debug import profile
18 from PLC.Table import Row, Table
19 from PLC.NetworkTypes import NetworkType, NetworkTypes
20 from PLC.NetworkMethods import NetworkMethod, NetworkMethods
25 ip = socket.inet_ntoa(socket.inet_aton(ip))
30 def in_same_network(address1, address2, netmask):
32 Returns True if two IPv4 addresses are in the same network. Faults
33 if an address is invalid.
36 address1 = struct.unpack('>L', socket.inet_aton(address1))[0]
37 address2 = struct.unpack('>L', socket.inet_aton(address2))[0]
38 netmask = struct.unpack('>L', socket.inet_aton(netmask))[0]
40 return (address1 & netmask) == (address2 & netmask)
42 class NodeNetwork(Row):
44 Representation of a row in the nodenetworks table. To use, optionally
45 instantiate with a dict of values. Update as you would a
46 dict. Commit to the database with sync().
49 table_name = 'nodenetworks'
50 primary_key = 'nodenetwork_id'
52 'nodenetwork_id': Parameter(int, "Node interface identifier"),
53 'method': Parameter(str, "Addressing method (e.g., 'static' or 'dhcp')"),
54 'type': Parameter(str, "Address type (e.g., 'ipv4')"),
55 'ip': Parameter(str, "IP address", nullok = True),
56 'mac': Parameter(str, "MAC address", nullok = True),
57 'gateway': Parameter(str, "IP address of primary gateway", nullok = True),
58 'network': Parameter(str, "Subnet address", nullok = True),
59 'broadcast': Parameter(str, "Network broadcast address", nullok = True),
60 'netmask': Parameter(str, "Subnet mask", nullok = True),
61 'dns1': Parameter(str, "IP address of primary DNS server", nullok = True),
62 'dns2': Parameter(str, "IP address of secondary DNS server", nullok = True),
63 'bwlimit': Parameter(int, "Bandwidth limit", min = 0, nullok = True),
64 'hostname': Parameter(str, "(Optional) Hostname", nullok = True),
65 'node_id': Parameter(int, "Node associated with this interface"),
66 'is_primary': Parameter(bool, "Is the primary interface for this node"),
69 def validate_method(self, method):
70 network_methods = [row['method'] for row in NetworkMethods(self.api)]
71 if method not in network_methods:
72 raise PLCInvalidArgument, "Invalid addressing method %s"%method
75 def validate_type(self, type):
76 network_types = [row['type'] for row in NetworkTypes(self.api)]
77 if type not in network_types:
78 raise PLCInvalidArgument, "Invalid address type %s"%type
81 def validate_ip(self, ip):
82 if ip and not valid_ip(ip):
83 raise PLCInvalidArgument, "Invalid IP address %s"%ip
86 def validate_mac(self, mac):
91 bytes = mac.split(":")
94 for i, byte in enumerate(bytes):
96 if byte < 0 or byte > 255:
98 bytes[i] = "%02x" % byte
101 raise PLCInvalidArgument, "Invalid MAC address %s"%mac
105 validate_gateway = validate_ip
106 validate_network = validate_ip
107 validate_broadcast = validate_ip
108 validate_netmask = validate_ip
109 validate_dns1 = validate_ip
110 validate_dns2 = validate_ip
112 def validate_bwlimit(self, bwlimit):
117 raise PLCInvalidArgument, 'Minimum bw is 500 kbs'
121 def validate_hostname(self, hostname):
126 if not PLC.Nodes.valid_hostname(hostname):
127 raise PLCInvalidArgument, "Invalid hostname %s"%hostname
131 def validate_node_id(self, node_id):
132 nodes = PLC.Nodes.Nodes(self.api, [node_id])
134 raise PLCInvalidArgument, "No such node %d"%node_id
138 def validate_is_primary(self, is_primary):
140 Set this interface to be the primary one.
144 nodes = PLC.Nodes.Nodes(self.api, [self['node_id']])
146 raise PLCInvalidArgument, "No such node %d"%node_id
149 if node['nodenetwork_ids']:
150 conflicts = NodeNetworks(self.api, node['nodenetwork_ids'])
151 for nodenetwork in conflicts:
152 if ('nodenetwork_id' not in self or \
153 self['nodenetwork_id'] != nodenetwork['nodenetwork_id']) and \
154 nodenetwork['is_primary']:
155 raise PLCInvalidArgument, "Can only set one primary interface per node"
161 Flush changes back to the database.
167 assert 'method' in self
168 method = self['method']
170 if method == "proxy" or method == "tap":
171 if 'mac' in self and self['mac']:
172 raise PLCInvalidArgument, "For %s method, mac should not be specified" % method
173 if 'ip' not in self or not self['ip']:
174 raise PLCInvalidArgument, "For %s method, ip is required" % method
175 if method == "tap" and ('gateway' not in self or not self['gateway']):
176 raise PLCInvalidArgument, "For tap method, gateway is required and should be " \
177 "the IP address of the node that proxies for this address"
178 # Should check that the proxy address is reachable, but
179 # there's no way to tell if the only primary interface is
182 elif method == "static":
183 for key in ['ip', 'gateway', 'network', 'broadcast', 'netmask', 'dns1']:
184 if key not in self or not self[key]:
185 raise PLCInvalidArgument, "For static method, %s is required" % key
186 globals()[key] = self[key]
187 if not in_same_network(ip, network, netmask):
188 raise PLCInvalidArgument, "IP address %s is inconsistent with network %s/%s" % \
189 (ip, network, netmask)
190 if not in_same_network(broadcast, network, netmask):
191 raise PLCInvalidArgument, "Broadcast address %s is inconsistent with network %s/%s" % \
192 (broadcast, network, netmask)
193 if not in_same_network(ip, gateway, netmask):
194 raise PLCInvalidArgument, "Gateway %s is not reachable from %s/%s" % \
195 (gateway, ip, netmask)
197 elif method == "ipmi":
198 if 'ip' not in self or not self['ip']:
199 raise PLCInvalidArgument, "For ipmi method, ip is required"
201 class NodeNetworks(Table):
203 Representation of row(s) from the nodenetworks table in the
207 def __init__(self, api, nodenetwork_filter = None, columns = None):
208 Table.__init__(self, api, NodeNetwork, columns)
210 sql = "SELECT %s FROM nodenetworks WHERE True" % \
211 ", ".join(self.columns)
213 if nodenetwork_filter is not None:
214 if isinstance(nodenetwork_filter, (list, tuple, set)):
215 nodenetwork_filter = Filter(NodeNetwork.fields, {'nodenetwork_id': nodenetwork_filter})
216 elif isinstance(nodenetwork_filter, dict):
217 nodenetwork_filter = Filter(NodeNetwork.fields, nodenetwork_filter)
218 sql += " AND (%s)" % nodenetwork_filter.sql(api)