1 | # PyKota |
---|
2 | # -*- coding: ISO-8859-15 -*- |
---|
3 | # |
---|
4 | # PyKota - Print Quotas for CUPS and LPRng |
---|
5 | # |
---|
6 | # (c) 2003, 2004, 2005 Jerome Alet <alet@librelogiciel.com> |
---|
7 | # This program is free software; you can redistribute it and/or modify |
---|
8 | # it under the terms of the GNU General Public License as published by |
---|
9 | # the Free Software Foundation; either version 2 of the License, or |
---|
10 | # (at your option) any later version. |
---|
11 | # |
---|
12 | # This program is distributed in the hope that it will be useful, |
---|
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
15 | # GNU General Public License for more details. |
---|
16 | # |
---|
17 | # You should have received a copy of the GNU General Public License |
---|
18 | # along with this program; if not, write to the Free Software |
---|
19 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
---|
20 | # |
---|
21 | # $Id$ |
---|
22 | # |
---|
23 | # |
---|
24 | |
---|
25 | ITERATIONDELAY = 1.5 # 1.5 Second |
---|
26 | STABILIZATIONDELAY = 3 # We must read three times the same value to consider it to be stable |
---|
27 | |
---|
28 | import sys |
---|
29 | import os |
---|
30 | import time |
---|
31 | import select |
---|
32 | |
---|
33 | try : |
---|
34 | from pysnmp.asn1.encoding.ber.error import TypeMismatchError |
---|
35 | from pysnmp.mapping.udp.error import SnmpOverUdpError |
---|
36 | from pysnmp.mapping.udp.role import Manager |
---|
37 | from pysnmp.proto.api import alpha |
---|
38 | except ImportError : |
---|
39 | class Handler : |
---|
40 | def __init__(self, parent, printerhostname) : |
---|
41 | """Just there to raise an exception.""" |
---|
42 | raise RuntimeError, "The pysnmp module is not available. Download it from http://pysnmp.sf.net/" |
---|
43 | else : |
---|
44 | pageCounterOID = ".1.3.6.1.2.1.43.10.2.1.4.1.1" # SNMPv2-SMI::mib-2.43.10.2.1.4.1.1 |
---|
45 | hrPrinterStatusOID = ".1.3.6.1.2.1.25.3.5.1.1.1" # SNMPv2-SMI::mib-2.25.3.5.1.1.1 |
---|
46 | printerStatusValues = { 1 : 'other', |
---|
47 | 2 : 'unknown', |
---|
48 | 3 : 'idle', |
---|
49 | 4 : 'printing', |
---|
50 | 5 : 'warmup', |
---|
51 | } |
---|
52 | hrDeviceStatusOID = ".1.3.6.1.2.1.25.3.2.1.5.1" # SNMPv2-SMI::mib-2.25.3.2.1.5.1 |
---|
53 | deviceStatusValues = { 1 : 'unknown', |
---|
54 | 2 : 'running', |
---|
55 | 3 : 'warning', |
---|
56 | 4 : 'testing', |
---|
57 | 5 : 'down', |
---|
58 | } |
---|
59 | hrPrinterDetectedErrorStateOID = ".1.3.6.1.2.1.25.3.5.1.2.1" # SNMPv2-SMI::mib-2.25.3.5.1.2.1 |
---|
60 | prtConsoleDisplayBufferTextOID = ".1.3.6.1.2.1.43.16.5.1.2.1.1" # SNMPv2-SMI::mib-2.43.16.5.1.2.1.1 |
---|
61 | |
---|
62 | # |
---|
63 | # Documentation taken from RFC 3805 (Printer MIB v2) and RFC 2790 (Host Resource MIB) |
---|
64 | # |
---|
65 | class Handler : |
---|
66 | """A class for SNMP print accounting.""" |
---|
67 | def __init__(self, parent, printerhostname) : |
---|
68 | self.parent = parent |
---|
69 | self.printerHostname = printerhostname |
---|
70 | try : |
---|
71 | self.community = self.parent.arguments.split(":")[1].strip() |
---|
72 | except IndexError : |
---|
73 | self.community = "public" |
---|
74 | self.port = 161 |
---|
75 | self.printerInternalPageCounter = None |
---|
76 | self.printerStatus = None |
---|
77 | self.deviceStatus = None |
---|
78 | |
---|
79 | def retrieveSNMPValues(self) : |
---|
80 | """Retrieves a printer's internal page counter and status via SNMP.""" |
---|
81 | ver = alpha.protoVersions[alpha.protoVersionId1] |
---|
82 | req = ver.Message() |
---|
83 | req.apiAlphaSetCommunity(self.community) |
---|
84 | req.apiAlphaSetPdu(ver.GetRequestPdu()) |
---|
85 | req.apiAlphaGetPdu().apiAlphaSetVarBindList((pageCounterOID, ver.Null()), \ |
---|
86 | (hrPrinterStatusOID, ver.Null()), \ |
---|
87 | (hrDeviceStatusOID, ver.Null())) |
---|
88 | tsp = Manager() |
---|
89 | try : |
---|
90 | tsp.sendAndReceive(req.berEncode(), \ |
---|
91 | (self.printerHostname, self.port), \ |
---|
92 | (self.handleAnswer, req)) |
---|
93 | except (SnmpOverUdpError, select.error), msg : |
---|
94 | self.parent.filter.printInfo(_("Network error while doing SNMP queries on printer %s : %s") % (self.printerHostname, msg), "warn") |
---|
95 | tsp.close() |
---|
96 | |
---|
97 | def handleAnswer(self, wholeMsg, notusedhere, req): |
---|
98 | """Decodes and handles the SNMP answer.""" |
---|
99 | self.parent.filter.logdebug("SNMP message : '%s'" % repr(wholeMsg)) |
---|
100 | ver = alpha.protoVersions[alpha.protoVersionId1] |
---|
101 | rsp = ver.Message() |
---|
102 | try : |
---|
103 | rsp.berDecode(wholeMsg) |
---|
104 | except TypeMismatchError, msg : |
---|
105 | self.parent.filter.printInfo(_("SNMP message decoding error for printer %s : %s") % (self.printerHostname, msg), "warn") |
---|
106 | else : |
---|
107 | if req.apiAlphaMatch(rsp): |
---|
108 | errorStatus = rsp.apiAlphaGetPdu().apiAlphaGetErrorStatus() |
---|
109 | if errorStatus: |
---|
110 | self.parent.filter.printInfo(_("Problem encountered while doing SNMP queries on printer %s : %s") % (self.printerHostname, errorStatus), "warn") |
---|
111 | else: |
---|
112 | self.values = [] |
---|
113 | for varBind in rsp.apiAlphaGetPdu().apiAlphaGetVarBindList(): |
---|
114 | self.values.append(varBind.apiAlphaGetOidVal()[1].rawAsn1Value) |
---|
115 | try : |
---|
116 | # keep maximum value seen for printer's internal page counter |
---|
117 | self.printerInternalPageCounter = max(self.printerInternalPageCounter, self.values[0]) |
---|
118 | self.printerStatus = self.values[1] |
---|
119 | self.deviceStatus = self.values[2] |
---|
120 | self.parent.filter.logdebug("SNMP answer is decoded : PageCounter : %s PrinterStatus : %s DeviceStatus : %s" % tuple(self.values)) |
---|
121 | except IndexError : |
---|
122 | self.parent.filter.logdebug("SNMP answer is incomplete : %s" % str(self.values)) |
---|
123 | pass |
---|
124 | else : |
---|
125 | return 1 |
---|
126 | |
---|
127 | def waitPrinting(self) : |
---|
128 | """Waits for printer status being 'printing'.""" |
---|
129 | firstvalue = None |
---|
130 | while 1: |
---|
131 | self.retrieveSNMPValues() |
---|
132 | statusAsString = printerStatusValues.get(self.printerStatus) |
---|
133 | if statusAsString in ('printing', 'warmup') : |
---|
134 | break |
---|
135 | if self.printerInternalPageCounter is not None : |
---|
136 | if firstvalue is None : |
---|
137 | # first time we retrieved a page counter, save it |
---|
138 | firstvalue = self.printerInternalPageCounter |
---|
139 | else : |
---|
140 | # second time (or later) |
---|
141 | if firstvalue < self.printerInternalPageCounter : |
---|
142 | # Here we have a printer which lies : |
---|
143 | # it says it is not printing or warming up |
---|
144 | # BUT the page counter increases !!! |
---|
145 | # So we can probably quit being sure it is printing. |
---|
146 | self.parent.filter.printInfo("Printer %s is lying to us !!!" % self.parent.filter.PrinterName, "warn") |
---|
147 | break |
---|
148 | self.parent.filter.logdebug(_("Waiting for printer %s to be printing...") % self.parent.filter.PrinterName) |
---|
149 | time.sleep(ITERATIONDELAY) |
---|
150 | |
---|
151 | def waitIdle(self) : |
---|
152 | """Waits for printer status being 'idle'.""" |
---|
153 | idle_num = idle_flag = 0 |
---|
154 | while 1 : |
---|
155 | self.retrieveSNMPValues() |
---|
156 | pstatusAsString = printerStatusValues.get(self.printerStatus) |
---|
157 | dstatusAsString = deviceStatusValues.get(self.deviceStatus) |
---|
158 | idle_flag = 0 |
---|
159 | if (pstatusAsString == 'idle') or \ |
---|
160 | ((pstatusAsString == 'other') and \ |
---|
161 | (dstatusAsString == 'running')) : |
---|
162 | idle_flag = 1 # Standby / Powersave is considered idle |
---|
163 | if idle_flag : |
---|
164 | idle_num += 1 |
---|
165 | if idle_num >= STABILIZATIONDELAY : |
---|
166 | # printer status is stable, we can exit |
---|
167 | break |
---|
168 | else : |
---|
169 | idle_num = 0 |
---|
170 | self.parent.filter.logdebug(_("Waiting for printer %s's idle status to stabilize...") % self.parent.filter.PrinterName) |
---|
171 | time.sleep(ITERATIONDELAY) |
---|
172 | |
---|
173 | def retrieveInternalPageCounter(self) : |
---|
174 | """Returns the page counter from the printer via internal SNMP handling.""" |
---|
175 | try : |
---|
176 | if (os.environ.get("PYKOTASTATUS") != "CANCELLED") and \ |
---|
177 | (os.environ.get("PYKOTAACTION") != "DENY") and \ |
---|
178 | (os.environ.get("PYKOTAPHASE") == "AFTER") and \ |
---|
179 | self.parent.filter.JobSizeBytes : |
---|
180 | self.waitPrinting() |
---|
181 | self.waitIdle() |
---|
182 | except : |
---|
183 | if self.printerInternalPageCounter is None : |
---|
184 | raise |
---|
185 | else : |
---|
186 | self.parent.filter.printInfo(_("SNMP querying stage interrupted. Using latest value seen for internal page counter (%s) on printer %s.") % (self.printerInternalPageCounter, self.parent.filter.PrinterName), "warn") |
---|
187 | return self.printerInternalPageCounter |
---|
188 | |
---|
189 | def main(hostname) : |
---|
190 | """Tries SNMP accounting for a printer host.""" |
---|
191 | class fakeFilter : |
---|
192 | def __init__(self) : |
---|
193 | self.PrinterName = "FakePrintQueue" |
---|
194 | self.JobSizeBytes = 1 |
---|
195 | |
---|
196 | def printInfo(self, msg, level="info") : |
---|
197 | sys.stderr.write("%s : %s\n" % (level.upper(), msg)) |
---|
198 | sys.stderr.flush() |
---|
199 | |
---|
200 | def logdebug(self, msg) : |
---|
201 | self.printInfo(msg, "debug") |
---|
202 | |
---|
203 | class fakeAccounter : |
---|
204 | def __init__(self) : |
---|
205 | self.arguments = "snmp:public" |
---|
206 | self.filter = fakeFilter() |
---|
207 | self.protocolHandler = Handler(self, hostname) |
---|
208 | |
---|
209 | acc = fakeAccounter() |
---|
210 | return acc.protocolHandler.retrieveInternalPageCounter() |
---|
211 | |
---|
212 | if __name__ == "__main__" : |
---|
213 | if len(sys.argv) != 2 : |
---|
214 | sys.stderr.write("Usage : python %s printer_ip_address\n" % sys.argv[0]) |
---|
215 | else : |
---|
216 | def _(msg) : |
---|
217 | return msg |
---|
218 | |
---|
219 | pagecounter = main(sys.argv[1]) |
---|
220 | print "Internal page counter's value is : %s" % pagecounter |
---|