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 1.4 2006/09/25 14:55:43 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
20 def in_same_network(address1, address2, netmask):
22 Returns True if two IPv4 addresses are in the same network. Faults
23 if an address is invalid.
26 address1 = struct.unpack('>L', socket.inet_aton(address1))[0]
27 address2 = struct.unpack('>L', socket.inet_aton(address2))[0]
28 netmask = struct.unpack('>L', socket.inet_aton(netmask))[0]
30 return (address1 & netmask) == (address2 & netmask)
32 class NodeNetwork(Row):
34 Representation of a row in the nodenetworks table. To use, optionally
35 instantiate with a dict of values. Update as you would a
36 dict. Commit to the database with sync().
39 table_name = 'nodenetworks'
40 primary_key = 'nodenetwork_id'
42 'nodenetwork_id': Parameter(int, "Node interface identifier"),
43 'method': Parameter(str, "Addressing method (e.g., 'static' or 'dhcp')"),
44 'type': Parameter(str, "Address type (e.g., 'ipv4')"),
45 'ip': Parameter(str, "IP address"),
46 'mac': Parameter(str, "MAC address"),
47 'gateway': Parameter(str, "IP address of primary gateway"),
48 'network': Parameter(str, "Subnet address"),
49 'broadcast': Parameter(str, "Network broadcast address"),
50 'netmask': Parameter(str, "Subnet mask"),
51 'dns1': Parameter(str, "IP address of primary DNS server"),
52 'dns2': Parameter(str, "IP address of secondary DNS server"),
53 # XXX Should be an int (bps)
54 'bwlimit': Parameter(str, "Bandwidth limit"),
55 'hostname': Parameter(str, "(Optional) Hostname"),
56 'node_id': Parameter(int, "Node associated with this interface (if any)"),
57 'is_primary': Parameter(bool, "Is the primary interface for this node"),
60 methods = ['static', 'dhcp', 'proxy', 'tap', 'ipmi', 'unknown']
65 '100kbit', '250kbit', '500kbit',
66 '1mbit', '2mbit', '5mbit',
67 '10mbit', '20mbit', '50mbit',
70 def __init__(self, api, fields = {}):
71 Row.__init__(self, fields)
74 def validate_method(self, method):
75 if method not in self.methods:
76 raise PLCInvalidArgument, "Invalid addressing method"
79 def validate_type(self, type):
80 if type not in self.types:
81 raise PLCInvalidArgument, "Invalid address type"
84 def validate_ip(self, ip):
87 ip = socket.inet_ntoa(socket.inet_aton(ip))
89 raise PLCInvalidArgument, "Invalid IP address " + ip
93 def validate_mac(self, mac):
95 bytes = mac.split(":")
98 for i, byte in enumerate(bytes):
100 if byte < 0 or byte > 255:
102 bytes[i] = "%02x" % byte
103 mac = ":".join(bytes)
105 raise PLCInvalidArgument, "Invalid MAC address"
109 validate_gateway = validate_ip
110 validate_network = validate_ip
111 validate_broadcast = validate_ip
112 validate_netmask = validate_ip
113 validate_dns1 = validate_ip
114 validate_dns2 = validate_ip
116 def validate_bwlimit(self, bwlimit):
117 if bwlimit not in self.bwlimits:
118 raise PLCInvalidArgument, "Invalid bandwidth limit"
121 def validate_hostname(self, hostname):
126 # Validate hostname, and check for conflicts with a node hostname
127 return PLC.Nodes.Node.validate_hostname(self, hostname)
131 Flush changes back to the database.
137 assert 'method' in self
138 method = self['method']
140 if method == "proxy" or method == "tap":
141 if 'mac' in self and self['mac']:
142 raise PLCInvalidArgument, "For %s method, mac should not be specified" % method
143 if 'ip' not in self or not self['ip']:
144 raise PLCInvalidArgument, "For %s method, ip is required" % method
145 if method == "tap" and ('gateway' not in self or not self['gateway']):
146 raise PLCInvalidArgument, "For tap method, gateway is required and should be " \
147 "the IP address of the node that proxies for this address"
148 # Should check that the proxy address is reachable, but
149 # there's no way to tell if the only primary interface is
152 elif method == "static":
153 for key in ['ip', 'gateway', 'network', 'broadcast', 'netmask', 'dns1']:
154 if key not in self or not self[key]:
155 raise PLCInvalidArgument, "For static method, %s is required" % key
156 globals()[key] = self[key]
157 if not in_same_network(ip, network, netmask):
158 raise PLCInvalidArgument, "IP address %s is inconsistent with network %s/%s" % \
159 (ip, network, netmask)
160 if not in_same_network(broadcast, network, netmask):
161 raise PLCInvalidArgument, "Broadcast address %s is inconsistent with network %s/%s" % \
162 (broadcast, network, netmask)
163 if not in_same_network(ip, gateway, netmask):
164 raise PLCInvalidArgument, "Gateway %s is not reachable from %s/%s" % \
165 (gateway, ip, netmask)
167 elif method == "ipmi":
168 if 'ip' not in self or not self['ip']:
169 raise PLCInvalidArgument, "For ipmi method, ip is required"
171 def delete(self, commit = True):
173 Delete existing nodenetwork.
176 assert 'nodenetwork_id' in self
179 self.api.db.do("DELETE FROM nodenetworks" \
180 " WHERE nodenetwork_id = %d" % \
181 self['nodenetwork_id'])
186 class NodeNetworks(Table):
188 Representation of row(s) from the nodenetworks table in the
192 def __init__(self, api, nodenetwork_id_or_hostname_list = None):
195 sql = "SELECT %s FROM nodenetworks" % \
196 ", ".join(NodeNetwork.fields)
198 if nodenetwork_id_or_hostname_list:
199 # Separate the list into integers and strings
200 nodenetwork_ids = filter(lambda nodenetwork_id: isinstance(nodenetwork_id, (int, long)),
201 nodenetwork_id_or_hostname_list)
202 hostnames = filter(lambda hostname: isinstance(hostname, StringTypes),
203 nodenetwork_id_or_hostname_list)
204 sql += " WHERE (False"
206 sql += " OR nodenetwork_id IN (%s)" % ", ".join(map(str, nodenetwork_ids))
208 sql += " OR hostname IN (%s)" % ", ".join(api.db.quote(hostnames)).lower()
211 rows = self.api.db.selectall(sql)
214 self[row['nodenetwork_id']] = NodeNetwork(api, row)