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 1.5 2006/10/03 19:25:37 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
22 def in_same_network(address1, address2, netmask):
24 Returns True if two IPv4 addresses are in the same network. Faults
25 if an address is invalid.
28 address1 = struct.unpack('>L', socket.inet_aton(address1))[0]
29 address2 = struct.unpack('>L', socket.inet_aton(address2))[0]
30 netmask = struct.unpack('>L', socket.inet_aton(netmask))[0]
32 return (address1 & netmask) == (address2 & netmask)
34 class NodeNetwork(Row):
36 Representation of a row in the nodenetworks table. To use, optionally
37 instantiate with a dict of values. Update as you would a
38 dict. Commit to the database with sync().
41 table_name = 'nodenetworks'
42 primary_key = 'nodenetwork_id'
44 'nodenetwork_id': Parameter(int, "Node interface identifier"),
45 'method': Parameter(str, "Addressing method (e.g., 'static' or 'dhcp')"),
46 'type': Parameter(str, "Address type (e.g., 'ipv4')"),
47 'ip': Parameter(str, "IP address"),
48 'mac': Parameter(str, "MAC address"),
49 'gateway': Parameter(str, "IP address of primary gateway"),
50 'network': Parameter(str, "Subnet address"),
51 'broadcast': Parameter(str, "Network broadcast address"),
52 'netmask': Parameter(str, "Subnet mask"),
53 'dns1': Parameter(str, "IP address of primary DNS server"),
54 'dns2': Parameter(str, "IP address of secondary DNS server"),
55 # XXX Should be an int (bps)
56 'bwlimit': Parameter(str, "Bandwidth limit"),
57 'hostname': Parameter(str, "(Optional) Hostname"),
58 'node_id': Parameter(int, "Node associated with this interface (if any)"),
59 'is_primary': Parameter(bool, "Is the primary interface for this node"),
63 '100kbit', '250kbit', '500kbit',
64 '1mbit', '2mbit', '5mbit',
65 '10mbit', '20mbit', '50mbit',
68 def __init__(self, api, fields = {}):
69 Row.__init__(self, fields)
72 def validate_method(self, method):
73 if method not in NetworkMethods(self.api):
74 raise PLCInvalidArgument, "Invalid addressing method"
77 def validate_type(self, type):
78 if type not in NetworkTypes(self.api):
79 raise PLCInvalidArgument, "Invalid address type"
82 def validate_ip(self, ip):
85 ip = socket.inet_ntoa(socket.inet_aton(ip))
87 raise PLCInvalidArgument, "Invalid IP address " + ip
91 def validate_mac(self, mac):
93 bytes = mac.split(":")
96 for i, byte in enumerate(bytes):
98 if byte < 0 or byte > 255:
100 bytes[i] = "%02x" % byte
101 mac = ":".join(bytes)
103 raise PLCInvalidArgument, "Invalid MAC address"
107 validate_gateway = validate_ip
108 validate_network = validate_ip
109 validate_broadcast = validate_ip
110 validate_netmask = validate_ip
111 validate_dns1 = validate_ip
112 validate_dns2 = validate_ip
114 def validate_bwlimit(self, bwlimit):
115 if bwlimit not in self.bwlimits:
116 raise PLCInvalidArgument, "Invalid bandwidth limit"
119 def validate_hostname(self, hostname):
124 # Validate hostname, and check for conflicts with a node hostname
125 return PLC.Nodes.Node.validate_hostname(self, hostname)
127 def validate_node_id(self, node_id):
128 nodes = PLC.Nodes.Nodes(self.api, [node_id])
130 raise PLCInvalidArgument, "No such node"
134 def validate_is_primary(self, is_primary):
136 Set this interface to be the primary one.
140 nodes = Nodes(self.api, [self['node_id']])
142 raise PLCInvalidArgument, "No such node"
145 if node['nodenetwork_ids']:
146 conflicts = NodeNetworks(self.api, node['nodenetwork_ids'])
147 for nodenetwork_id, nodenetwork in conflicts.iteritems():
148 if ('nodenetwork_id' not in self or self['nodenetwork_id'] != nodenetwork_id) and \
149 nodenetwork['is_primary']:
150 raise PLCInvalidArgument, "Can only set one primary interface per node"
156 Flush changes back to the database.
162 assert 'method' in self
163 method = self['method']
165 if method == "proxy" or method == "tap":
166 if 'mac' in self and self['mac']:
167 raise PLCInvalidArgument, "For %s method, mac should not be specified" % method
168 if 'ip' not in self or not self['ip']:
169 raise PLCInvalidArgument, "For %s method, ip is required" % method
170 if method == "tap" and ('gateway' not in self or not self['gateway']):
171 raise PLCInvalidArgument, "For tap method, gateway is required and should be " \
172 "the IP address of the node that proxies for this address"
173 # Should check that the proxy address is reachable, but
174 # there's no way to tell if the only primary interface is
177 elif method == "static":
178 for key in ['ip', 'gateway', 'network', 'broadcast', 'netmask', 'dns1']:
179 if key not in self or not self[key]:
180 raise PLCInvalidArgument, "For static method, %s is required" % key
181 globals()[key] = self[key]
182 if not in_same_network(ip, network, netmask):
183 raise PLCInvalidArgument, "IP address %s is inconsistent with network %s/%s" % \
184 (ip, network, netmask)
185 if not in_same_network(broadcast, network, netmask):
186 raise PLCInvalidArgument, "Broadcast address %s is inconsistent with network %s/%s" % \
187 (broadcast, network, netmask)
188 if not in_same_network(ip, gateway, netmask):
189 raise PLCInvalidArgument, "Gateway %s is not reachable from %s/%s" % \
190 (gateway, ip, netmask)
192 elif method == "ipmi":
193 if 'ip' not in self or not self['ip']:
194 raise PLCInvalidArgument, "For ipmi method, ip is required"
196 def delete(self, commit = True):
198 Delete existing nodenetwork.
201 assert 'nodenetwork_id' in self
204 self.api.db.do("DELETE FROM nodenetworks" \
205 " WHERE nodenetwork_id = %d" % \
206 self['nodenetwork_id'])
211 class NodeNetworks(Table):
213 Representation of row(s) from the nodenetworks table in the
217 def __init__(self, api, nodenetwork_id_or_hostname_list = None):
220 sql = "SELECT %s FROM nodenetworks" % \
221 ", ".join(NodeNetwork.fields)
223 if nodenetwork_id_or_hostname_list:
224 # Separate the list into integers and strings
225 nodenetwork_ids = filter(lambda nodenetwork_id: isinstance(nodenetwork_id, (int, long)),
226 nodenetwork_id_or_hostname_list)
227 hostnames = filter(lambda hostname: isinstance(hostname, StringTypes),
228 nodenetwork_id_or_hostname_list)
229 sql += " WHERE (False"
231 sql += " OR nodenetwork_id IN (%s)" % ", ".join(map(str, nodenetwork_ids))
233 sql += " OR hostname IN (%s)" % ", ".join(api.db.quote(hostnames)).lower()
236 rows = self.api.db.selectall(sql)
239 self[row['nodenetwork_id']] = NodeNetwork(api, row)