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 1.6 2006/10/10 20:27:13 mlhuang Exp $
10 from types import StringTypes
14 from PLC.Faults import *
15 from PLC.Parameter import Parameter
16 from PLC.Debug import profile
17 from PLC.Table import Row, Table
18 from PLC.NetworkTypes import NetworkType, NetworkTypes
19 from PLC.NetworkMethods import NetworkMethod, NetworkMethods
24 ip = socket.inet_ntoa(socket.inet_aton(ip))
29 def in_same_network(address1, address2, netmask):
31 Returns True if two IPv4 addresses are in the same network. Faults
32 if an address is invalid.
35 address1 = struct.unpack('>L', socket.inet_aton(address1))[0]
36 address2 = struct.unpack('>L', socket.inet_aton(address2))[0]
37 netmask = struct.unpack('>L', socket.inet_aton(netmask))[0]
39 return (address1 & netmask) == (address2 & netmask)
41 class NodeNetwork(Row):
43 Representation of a row in the nodenetworks table. To use, optionally
44 instantiate with a dict of values. Update as you would a
45 dict. Commit to the database with sync().
48 table_name = 'nodenetworks'
49 primary_key = 'nodenetwork_id'
51 'nodenetwork_id': Parameter(int, "Node interface identifier"),
52 'method': Parameter(str, "Addressing method (e.g., 'static' or 'dhcp')"),
53 'type': Parameter(str, "Address type (e.g., 'ipv4')"),
54 'ip': Parameter(str, "IP address"),
55 'mac': Parameter(str, "MAC address"),
56 'gateway': Parameter(str, "IP address of primary gateway"),
57 'network': Parameter(str, "Subnet address"),
58 'broadcast': Parameter(str, "Network broadcast address"),
59 'netmask': Parameter(str, "Subnet mask"),
60 'dns1': Parameter(str, "IP address of primary DNS server"),
61 'dns2': Parameter(str, "IP address of secondary DNS server"),
62 # XXX Should be an int (bps)
63 'bwlimit': Parameter(str, "Bandwidth limit"),
64 'hostname': Parameter(str, "(Optional) Hostname"),
65 'node_id': Parameter(int, "Node associated with this interface (if any)"),
66 'is_primary': Parameter(bool, "Is the primary interface for this node"),
70 '100kbit', '250kbit', '500kbit',
71 '1mbit', '2mbit', '5mbit',
72 '10mbit', '20mbit', '50mbit',
75 def __init__(self, api, fields = {}):
76 Row.__init__(self, fields)
79 def validate_method(self, method):
80 if method not in NetworkMethods(self.api):
81 raise PLCInvalidArgument, "Invalid addressing method"
84 def validate_type(self, type):
85 if type not in NetworkTypes(self.api):
86 raise PLCInvalidArgument, "Invalid address type"
89 def validate_ip(self, ip):
90 if ip and not valid_ip(ip):
91 raise PLCInvalidArgument, "Invalid IP address " + ip
94 def validate_mac(self, mac):
96 bytes = mac.split(":")
99 for i, byte in enumerate(bytes):
101 if byte < 0 or byte > 255:
103 bytes[i] = "%02x" % byte
104 mac = ":".join(bytes)
106 raise PLCInvalidArgument, "Invalid MAC address"
110 validate_gateway = validate_ip
111 validate_network = validate_ip
112 validate_broadcast = validate_ip
113 validate_netmask = validate_ip
114 validate_dns1 = validate_ip
115 validate_dns2 = validate_ip
117 def validate_bwlimit(self, bwlimit):
118 if bwlimit not in self.bwlimits:
119 raise PLCInvalidArgument, "Invalid bandwidth limit"
122 def validate_hostname(self, hostname):
127 if not PLC.Nodes.valid_hostname(hostname):
128 raise PLCInvalidArgument, "Invalid hostname"
130 conflicts = NodeNetworks(self.api, [hostname])
131 for nodenetwork_id, nodenetwork in conflicts.iteritems():
132 if 'nodenetwork_id' not in self or self['nodenetwork_id'] != nodenetwork_id:
133 raise PLCInvalidArgument, "Hostname already in use"
135 # Check for conflicts with a node hostname
136 conflicts = PLC.Nodes.Nodes(self.api, [hostname])
137 for node_id in conflicts.iteritems():
138 if 'node_id' not in self or self['node_id'] != node_id:
139 raise PLCInvalidArgument, "Hostname already in use"
143 def validate_node_id(self, node_id):
144 nodes = PLC.Nodes.Nodes(self.api, [node_id])
146 raise PLCInvalidArgument, "No such node"
150 def validate_is_primary(self, is_primary):
152 Set this interface to be the primary one.
156 nodes = PLC.Nodes.Nodes(self.api, [self['node_id']]).values()
158 raise PLCInvalidArgument, "No such node"
161 if node['nodenetwork_ids']:
162 conflicts = NodeNetworks(self.api, node['nodenetwork_ids'])
163 for nodenetwork_id, nodenetwork in conflicts.iteritems():
164 if ('nodenetwork_id' not in self or self['nodenetwork_id'] != nodenetwork_id) and \
165 nodenetwork['is_primary']:
166 raise PLCInvalidArgument, "Can only set one primary interface per node"
172 Flush changes back to the database.
178 assert 'method' in self
179 method = self['method']
181 if method == "proxy" or method == "tap":
182 if 'mac' in self and self['mac']:
183 raise PLCInvalidArgument, "For %s method, mac should not be specified" % method
184 if 'ip' not in self or not self['ip']:
185 raise PLCInvalidArgument, "For %s method, ip is required" % method
186 if method == "tap" and ('gateway' not in self or not self['gateway']):
187 raise PLCInvalidArgument, "For tap method, gateway is required and should be " \
188 "the IP address of the node that proxies for this address"
189 # Should check that the proxy address is reachable, but
190 # there's no way to tell if the only primary interface is
193 elif method == "static":
194 for key in ['ip', 'gateway', 'network', 'broadcast', 'netmask', 'dns1']:
195 if key not in self or not self[key]:
196 raise PLCInvalidArgument, "For static method, %s is required" % key
197 globals()[key] = self[key]
198 if not in_same_network(ip, network, netmask):
199 raise PLCInvalidArgument, "IP address %s is inconsistent with network %s/%s" % \
200 (ip, network, netmask)
201 if not in_same_network(broadcast, network, netmask):
202 raise PLCInvalidArgument, "Broadcast address %s is inconsistent with network %s/%s" % \
203 (broadcast, network, netmask)
204 if not in_same_network(ip, gateway, netmask):
205 raise PLCInvalidArgument, "Gateway %s is not reachable from %s/%s" % \
206 (gateway, ip, netmask)
208 elif method == "ipmi":
209 if 'ip' not in self or not self['ip']:
210 raise PLCInvalidArgument, "For ipmi method, ip is required"
212 def delete(self, commit = True):
214 Delete existing nodenetwork.
217 assert 'nodenetwork_id' in self
220 self.api.db.do("DELETE FROM nodenetworks" \
221 " WHERE nodenetwork_id = %d" % \
222 self['nodenetwork_id'])
227 class NodeNetworks(Table):
229 Representation of row(s) from the nodenetworks table in the
233 def __init__(self, api, nodenetwork_id_or_hostname_list = None):
236 sql = "SELECT %s FROM nodenetworks" % \
237 ", ".join(NodeNetwork.fields)
239 if nodenetwork_id_or_hostname_list:
240 # Separate the list into integers and strings
241 nodenetwork_ids = filter(lambda nodenetwork_id: isinstance(nodenetwork_id, (int, long)),
242 nodenetwork_id_or_hostname_list)
243 hostnames = filter(lambda hostname: isinstance(hostname, StringTypes),
244 nodenetwork_id_or_hostname_list)
245 sql += " WHERE (False"
247 sql += " OR nodenetwork_id IN (%s)" % ", ".join(map(str, nodenetwork_ids))
249 sql += " OR hostname IN (%s)" % ", ".join(api.db.quote(hostnames)).lower()
252 rows = self.api.db.selectall(sql)
255 self[row['nodenetwork_id']] = NodeNetwork(api, row)