[3260] | 1 | # -*- coding: UTF-8 -*- |
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[2205] | 2 | # |
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[3260] | 3 | # PyKota : Print Quotas for CUPS |
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[2205] | 4 | # |
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[3275] | 5 | # (c) 2003, 2004, 2005, 2006, 2007, 2008 Jerome Alet <alet@librelogiciel.com> |
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[3260] | 6 | # This program is free software: you can redistribute it and/or modify |
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[2205] | 7 | # it under the terms of the GNU General Public License as published by |
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[3260] | 8 | # the Free Software Foundation, either version 3 of the License, or |
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[2205] | 9 | # (at your option) any later version. |
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[3260] | 10 | # |
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[2205] | 11 | # This program is distributed in the hope that it will be useful, |
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | # GNU General Public License for more details. |
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| 15 | # |
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| 16 | # You should have received a copy of the GNU General Public License |
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[3260] | 17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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[2205] | 18 | # |
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| 19 | # $Id$ |
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| 20 | # |
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| 21 | # |
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| 22 | |
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[3025] | 23 | """This module is used to extract printer's internal page counter |
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| 24 | and status informations using SNMP queries. |
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| 25 | |
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| 26 | The values extracted are defined at least in RFC3805 and RFC2970. |
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| 27 | """ |
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| 28 | |
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[2205] | 29 | |
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| 30 | import sys |
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| 31 | import os |
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| 32 | import time |
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[2319] | 33 | import select |
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[3161] | 34 | import socket |
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[2205] | 35 | |
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| 36 | try : |
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[2877] | 37 | from pysnmp.entity.rfc3413.oneliner import cmdgen |
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| 38 | except ImportError : |
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| 39 | hasV4 = False |
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| 40 | try : |
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| 41 | from pysnmp.asn1.encoding.ber.error import TypeMismatchError |
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| 42 | from pysnmp.mapping.udp.error import SnmpOverUdpError |
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| 43 | from pysnmp.mapping.udp.role import Manager |
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| 44 | from pysnmp.proto.api import alpha |
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| 45 | except ImportError : |
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| 46 | raise RuntimeError, "The pysnmp module is not available. Download it from http://pysnmp.sf.net/" |
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| 47 | else : |
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| 48 | hasV4 = True |
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| 49 | |
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[3175] | 50 | from pykota import constants |
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| 51 | |
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[2877] | 52 | # |
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| 53 | # Documentation taken from RFC 3805 (Printer MIB v2) and RFC 2790 (Host Resource MIB) |
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| 54 | # |
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| 55 | 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 |
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| 56 | hrPrinterStatusOID = "1.3.6.1.2.1.25.3.5.1.1.1" # SNMPv2-SMI::mib-2.25.3.5.1.1.1 |
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| 57 | printerStatusValues = { 1 : 'other', |
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| 58 | 2 : 'unknown', |
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| 59 | 3 : 'idle', |
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| 60 | 4 : 'printing', |
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| 61 | 5 : 'warmup', |
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| 62 | } |
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| 63 | hrDeviceStatusOID = "1.3.6.1.2.1.25.3.2.1.5.1" # SNMPv2-SMI::mib-2.25.3.2.1.5.1 |
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| 64 | deviceStatusValues = { 1 : 'unknown', |
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| 65 | 2 : 'running', |
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| 66 | 3 : 'warning', |
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| 67 | 4 : 'testing', |
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| 68 | 5 : 'down', |
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| 69 | } |
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| 70 | hrPrinterDetectedErrorStateOID = "1.3.6.1.2.1.25.3.5.1.2.1" # SNMPv2-SMI::mib-2.25.3.5.1.2.1 |
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[3025] | 71 | printerDetectedErrorStateValues = [ { 128 : 'Low Paper', |
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| 72 | 64 : 'No Paper', |
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| 73 | 32 : 'Low Toner', |
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| 74 | 16 : 'No Toner', |
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| 75 | 8 : 'Door Open', |
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| 76 | 4 : 'Jammed', |
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| 77 | 2 : 'Offline', |
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| 78 | 1 : 'Service Requested', |
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| 79 | }, |
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| 80 | { 128 : 'Input Tray Missing', |
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| 81 | 64 : 'Output Tray Missing', |
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| 82 | 32 : 'Marker Supply Missing', |
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| 83 | 16 : 'Output Near Full', |
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| 84 | 8 : 'Output Full', |
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| 85 | 4 : 'Input Tray Empty', |
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| 86 | 2 : 'Overdue Preventive Maintainance', |
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| 87 | 1 : 'Not Assigned in RFC3805', |
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| 88 | }, |
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| 89 | ] |
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[3145] | 90 | |
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[3190] | 91 | # The default error mask to use when checking error conditions. |
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| 92 | defaultErrorMask = 0x4fcc # [ 'No Paper', |
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| 93 | # 'Door Open', |
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| 94 | # 'Jammed', |
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| 95 | # 'Offline', |
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| 96 | # 'Service Requested', |
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| 97 | # 'Input Tray Missing', |
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| 98 | # 'Output Tray Missing', |
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| 99 | # 'Output Full', |
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| 100 | # 'Input Tray Empty', |
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| 101 | # ] |
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| 102 | |
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[3039] | 103 | # WARNING : some printers don't support this one : |
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[2877] | 104 | 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 |
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| 105 | class BaseHandler : |
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| 106 | """A class for SNMP print accounting.""" |
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[3162] | 107 | def __init__(self, parent, printerhostname, skipinitialwait=False) : |
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[2877] | 108 | self.parent = parent |
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| 109 | self.printerHostname = printerhostname |
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[3162] | 110 | self.skipinitialwait = skipinitialwait |
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[2877] | 111 | try : |
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| 112 | self.community = self.parent.arguments.split(":")[1].strip() |
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| 113 | except IndexError : |
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| 114 | self.community = "public" |
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| 115 | self.port = 161 |
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[3025] | 116 | self.initValues() |
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| 117 | |
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| 118 | def initValues(self) : |
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| 119 | """Initializes SNMP values.""" |
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[2877] | 120 | self.printerInternalPageCounter = None |
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| 121 | self.printerStatus = None |
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| 122 | self.deviceStatus = None |
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[3025] | 123 | self.printerDetectedErrorState = None |
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| 124 | self.timebefore = time.time() # resets timer also in case of error |
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[2877] | 125 | |
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| 126 | def retrieveSNMPValues(self) : |
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| 127 | """Retrieves a printer's internal page counter and status via SNMP.""" |
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| 128 | raise RuntimeError, "You have to overload this method." |
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| 129 | |
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[3025] | 130 | def extractErrorStates(self, value) : |
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| 131 | """Returns a list of textual error states from a binary value.""" |
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| 132 | states = [] |
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| 133 | for i in range(min(len(value), len(printerDetectedErrorStateValues))) : |
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| 134 | byte = ord(value[i]) |
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| 135 | bytedescription = printerDetectedErrorStateValues[i] |
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| 136 | for (k, v) in bytedescription.items() : |
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| 137 | if byte & k : |
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| 138 | states.append(v) |
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| 139 | return states |
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| 140 | |
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| 141 | def checkIfError(self, errorstates) : |
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| 142 | """Checks if any error state is fatal or not.""" |
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[3028] | 143 | if errorstates is None : |
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| 144 | return True |
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| 145 | else : |
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[3190] | 146 | try : |
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| 147 | errormask = self.parent.filter.config.getPrinterSNMPErrorMask(self.parent.filter.PrinterName) |
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| 148 | except AttributeError : # debug mode |
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| 149 | errormask = defaultErrorMask |
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| 150 | if errormask is None : |
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| 151 | errormask = defaultErrorMask |
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| 152 | errormaskbytes = [ chr((errormask & 0xff00) >> 8), |
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| 153 | chr((errormask & 0x00ff)), |
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| 154 | ] |
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| 155 | errorConditions = self.extractErrorStates(errormaskbytes) |
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| 156 | self.parent.filter.logdebug("Error conditions for mask 0x%04x : %s" \ |
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| 157 | % (errormask, errorConditions)) |
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[3028] | 158 | for err in errorstates : |
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| 159 | if err in errorConditions : |
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[3190] | 160 | self.parent.filter.logdebug("Error condition '%s' encountered. PyKota will wait until this problem is fixed." % err) |
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[3028] | 161 | return True |
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[3190] | 162 | self.parent.filter.logdebug("No error condition matching mask 0x%04x" % errormask) |
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[3028] | 163 | return False |
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[3025] | 164 | |
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[2877] | 165 | def waitPrinting(self) : |
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| 166 | """Waits for printer status being 'printing'.""" |
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[3180] | 167 | statusstabilizationdelay = constants.get(self.parent.filter, "StatusStabilizationDelay") |
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| 168 | noprintingmaxdelay = constants.get(self.parent.filter, "NoPrintingMaxDelay") |
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[3025] | 169 | if not noprintingmaxdelay : |
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| 170 | self.parent.filter.logdebug("Will wait indefinitely until printer %s is in 'printing' state." % self.parent.filter.PrinterName) |
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| 171 | else : |
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| 172 | self.parent.filter.logdebug("Will wait until printer %s is in 'printing' state or %i seconds have elapsed." % (self.parent.filter.PrinterName, noprintingmaxdelay)) |
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[2877] | 173 | previousValue = self.parent.getLastPageCounter() |
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| 174 | firstvalue = None |
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| 175 | while 1: |
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| 176 | self.retrieveSNMPValues() |
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| 177 | statusAsString = printerStatusValues.get(self.printerStatus) |
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| 178 | if statusAsString in ('printing', 'warmup') : |
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| 179 | break |
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| 180 | if self.printerInternalPageCounter is not None : |
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| 181 | if firstvalue is None : |
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| 182 | # first time we retrieved a page counter, save it |
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| 183 | firstvalue = self.printerInternalPageCounter |
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| 184 | else : |
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| 185 | # second time (or later) |
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| 186 | if firstvalue < self.printerInternalPageCounter : |
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| 187 | # Here we have a printer which lies : |
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| 188 | # it says it is not printing or warming up |
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| 189 | # BUT the page counter increases !!! |
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| 190 | # So we can probably quit being sure it is printing. |
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| 191 | self.parent.filter.printInfo("Printer %s is lying to us !!!" % self.parent.filter.PrinterName, "warn") |
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| 192 | break |
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[3025] | 193 | elif noprintingmaxdelay \ |
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| 194 | and ((time.time() - self.timebefore) > noprintingmaxdelay) \ |
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| 195 | and not self.checkIfError(self.printerDetectedErrorState) : |
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[2877] | 196 | # More than X seconds without the printer being in 'printing' mode |
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| 197 | # We can safely assume this won't change if printer is now 'idle' |
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| 198 | pstatusAsString = printerStatusValues.get(self.printerStatus) |
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| 199 | dstatusAsString = deviceStatusValues.get(self.deviceStatus) |
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| 200 | if (pstatusAsString == 'idle') or \ |
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| 201 | ((pstatusAsString == 'other') and \ |
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| 202 | (dstatusAsString == 'running')) : |
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| 203 | if self.printerInternalPageCounter == previousValue : |
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| 204 | # Here the job won't be printed, because probably |
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| 205 | # the printer rejected it for some reason. |
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| 206 | self.parent.filter.printInfo("Printer %s probably won't print this job !!!" % self.parent.filter.PrinterName, "warn") |
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| 207 | else : |
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| 208 | # Here the job has already been entirely printed, and |
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| 209 | # the printer has already passed from 'idle' to 'printing' to 'idle' again. |
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| 210 | self.parent.filter.printInfo("Printer %s has probably already printed this job !!!" % self.parent.filter.PrinterName, "warn") |
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| 211 | break |
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| 212 | self.parent.filter.logdebug(_("Waiting for printer %s to be printing...") % self.parent.filter.PrinterName) |
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[3180] | 213 | time.sleep(statusstabilizationdelay) |
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[2877] | 214 | |
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| 215 | def waitIdle(self) : |
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| 216 | """Waits for printer status being 'idle'.""" |
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[3180] | 217 | statusstabilizationdelay = constants.get(self.parent.filter, "StatusStabilizationDelay") |
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| 218 | statusstabilizationloops = constants.get(self.parent.filter, "StatusStabilizationLoops") |
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[2877] | 219 | idle_num = idle_flag = 0 |
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| 220 | while 1 : |
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| 221 | self.retrieveSNMPValues() |
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| 222 | pstatusAsString = printerStatusValues.get(self.printerStatus) |
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| 223 | dstatusAsString = deviceStatusValues.get(self.deviceStatus) |
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| 224 | idle_flag = 0 |
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[3025] | 225 | if (not self.checkIfError(self.printerDetectedErrorState)) \ |
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| 226 | and ((pstatusAsString == 'idle') or \ |
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| 227 | ((pstatusAsString == 'other') and \ |
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| 228 | (dstatusAsString == 'running'))) : |
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[2877] | 229 | idle_flag = 1 # Standby / Powersave is considered idle |
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| 230 | if idle_flag : |
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[3163] | 231 | if (self.printerInternalPageCounter is not None) \ |
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| 232 | and self.skipinitialwait \ |
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| 233 | and (os.environ.get("PYKOTAPHASE") == "BEFORE") : |
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| 234 | self.parent.filter.logdebug("No need to wait for the printer to be idle, it is the case already.") |
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| 235 | return |
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[2877] | 236 | idle_num += 1 |
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[3180] | 237 | if idle_num >= statusstabilizationloops : |
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[2877] | 238 | # printer status is stable, we can exit |
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| 239 | break |
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| 240 | else : |
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| 241 | idle_num = 0 |
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| 242 | self.parent.filter.logdebug(_("Waiting for printer %s's idle status to stabilize...") % self.parent.filter.PrinterName) |
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[3180] | 243 | time.sleep(statusstabilizationdelay) |
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[2205] | 244 | |
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[2877] | 245 | def retrieveInternalPageCounter(self) : |
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| 246 | """Returns the page counter from the printer via internal SNMP handling.""" |
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| 247 | try : |
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| 248 | if (os.environ.get("PYKOTASTATUS") != "CANCELLED") and \ |
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| 249 | (os.environ.get("PYKOTAACTION") == "ALLOW") and \ |
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| 250 | (os.environ.get("PYKOTAPHASE") == "AFTER") and \ |
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| 251 | self.parent.filter.JobSizeBytes : |
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| 252 | self.waitPrinting() |
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| 253 | self.waitIdle() |
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| 254 | except : |
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| 255 | 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") |
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| 256 | raise |
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| 257 | return self.printerInternalPageCounter |
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| 258 | |
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| 259 | if hasV4 : |
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| 260 | class Handler(BaseHandler) : |
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| 261 | """A class for pysnmp v4.x""" |
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| 262 | def retrieveSNMPValues(self) : |
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| 263 | """Retrieves a printer's internal page counter and status via SNMP.""" |
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[3160] | 264 | try : |
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| 265 | errorIndication, errorStatus, errorIndex, varBinds = \ |
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[2877] | 266 | cmdgen.CommandGenerator().getCmd(cmdgen.CommunityData("pykota", self.community, 0), \ |
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| 267 | cmdgen.UdpTransportTarget((self.printerHostname, self.port)), \ |
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| 268 | tuple([int(i) for i in pageCounterOID.split('.')]), \ |
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| 269 | tuple([int(i) for i in hrPrinterStatusOID.split('.')]), \ |
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[3025] | 270 | tuple([int(i) for i in hrDeviceStatusOID.split('.')]), \ |
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[3039] | 271 | tuple([int(i) for i in hrPrinterDetectedErrorStateOID.split('.')])) |
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[3161] | 272 | except socket.gaierror, msg : |
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| 273 | errorIndication = repr(msg) |
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[3160] | 274 | except : |
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| 275 | errorIndication = "Unknown SNMP/Network error. Check your wires." |
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[2877] | 276 | if errorIndication : |
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| 277 | self.parent.filter.printInfo("SNMP Error : %s" % errorIndication, "error") |
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[3025] | 278 | self.initValues() |
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[2877] | 279 | elif errorStatus : |
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| 280 | self.parent.filter.printInfo("SNMP Error : %s at %s" % (errorStatus.prettyPrint(), \ |
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| 281 | varBinds[int(errorIndex)-1]), \ |
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| 282 | "error") |
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[3027] | 283 | self.initValues() |
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[2877] | 284 | else : |
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| 285 | self.printerInternalPageCounter = max(self.printerInternalPageCounter, int(varBinds[0][1].prettyPrint())) |
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| 286 | self.printerStatus = int(varBinds[1][1].prettyPrint()) |
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| 287 | self.deviceStatus = int(varBinds[2][1].prettyPrint()) |
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[3025] | 288 | self.printerDetectedErrorState = self.extractErrorStates(str(varBinds[3][1])) |
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[3039] | 289 | self.parent.filter.logdebug("SNMP answer decoded : PageCounter : %s PrinterStatus : '%s' DeviceStatus : '%s' PrinterErrorState : '%s'" \ |
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[2877] | 290 | % (self.printerInternalPageCounter, \ |
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| 291 | printerStatusValues.get(self.printerStatus), \ |
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[3025] | 292 | deviceStatusValues.get(self.deviceStatus), \ |
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[3039] | 293 | self.printerDetectedErrorState)) |
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[2877] | 294 | else : |
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| 295 | class Handler(BaseHandler) : |
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| 296 | """A class for pysnmp v3.4.x""" |
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[2205] | 297 | def retrieveSNMPValues(self) : |
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| 298 | """Retrieves a printer's internal page counter and status via SNMP.""" |
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| 299 | ver = alpha.protoVersions[alpha.protoVersionId1] |
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| 300 | req = ver.Message() |
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[2423] | 301 | req.apiAlphaSetCommunity(self.community) |
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[2205] | 302 | req.apiAlphaSetPdu(ver.GetRequestPdu()) |
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| 303 | req.apiAlphaGetPdu().apiAlphaSetVarBindList((pageCounterOID, ver.Null()), \ |
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| 304 | (hrPrinterStatusOID, ver.Null()), \ |
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[3025] | 305 | (hrDeviceStatusOID, ver.Null()), \ |
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[3039] | 306 | (hrPrinterDetectedErrorStateOID, ver.Null())) |
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[2205] | 307 | tsp = Manager() |
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| 308 | try : |
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[2423] | 309 | tsp.sendAndReceive(req.berEncode(), \ |
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| 310 | (self.printerHostname, self.port), \ |
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| 311 | (self.handleAnswer, req)) |
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[2319] | 312 | except (SnmpOverUdpError, select.error), msg : |
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[2205] | 313 | self.parent.filter.printInfo(_("Network error while doing SNMP queries on printer %s : %s") % (self.printerHostname, msg), "warn") |
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[3027] | 314 | self.initValues() |
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[2205] | 315 | tsp.close() |
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[2877] | 316 | |
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[2205] | 317 | def handleAnswer(self, wholeMsg, notusedhere, req): |
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| 318 | """Decodes and handles the SNMP answer.""" |
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| 319 | ver = alpha.protoVersions[alpha.protoVersionId1] |
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| 320 | rsp = ver.Message() |
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| 321 | try : |
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| 322 | rsp.berDecode(wholeMsg) |
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| 323 | except TypeMismatchError, msg : |
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| 324 | self.parent.filter.printInfo(_("SNMP message decoding error for printer %s : %s") % (self.printerHostname, msg), "warn") |
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[3027] | 325 | self.initValues() |
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[2205] | 326 | else : |
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| 327 | if req.apiAlphaMatch(rsp): |
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| 328 | errorStatus = rsp.apiAlphaGetPdu().apiAlphaGetErrorStatus() |
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| 329 | if errorStatus: |
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| 330 | self.parent.filter.printInfo(_("Problem encountered while doing SNMP queries on printer %s : %s") % (self.printerHostname, errorStatus), "warn") |
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| 331 | else: |
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| 332 | self.values = [] |
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| 333 | for varBind in rsp.apiAlphaGetPdu().apiAlphaGetVarBindList(): |
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| 334 | self.values.append(varBind.apiAlphaGetOidVal()[1].rawAsn1Value) |
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| 335 | try : |
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| 336 | # keep maximum value seen for printer's internal page counter |
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| 337 | self.printerInternalPageCounter = max(self.printerInternalPageCounter, self.values[0]) |
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[2305] | 338 | self.printerStatus = self.values[1] |
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| 339 | self.deviceStatus = self.values[2] |
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[3025] | 340 | self.printerDetectedErrorState = self.extractErrorStates(self.values[3]) |
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[3039] | 341 | self.parent.filter.logdebug("SNMP answer decoded : PageCounter : %s PrinterStatus : '%s' DeviceStatus : '%s' PrinterErrorState : '%s'" \ |
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[2615] | 342 | % (self.printerInternalPageCounter, \ |
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[2617] | 343 | printerStatusValues.get(self.printerStatus), \ |
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[3025] | 344 | deviceStatusValues.get(self.deviceStatus), \ |
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[3039] | 345 | self.printerDetectedErrorState)) |
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[2205] | 346 | except IndexError : |
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| 347 | self.parent.filter.logdebug("SNMP answer is incomplete : %s" % str(self.values)) |
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| 348 | pass |
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| 349 | else : |
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| 350 | return 1 |
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[2877] | 351 | |
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[2506] | 352 | def main(hostname) : |
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| 353 | """Tries SNMP accounting for a printer host.""" |
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| 354 | class fakeFilter : |
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[2830] | 355 | """Fakes a filter for testing purposes.""" |
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[2506] | 356 | def __init__(self) : |
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[2830] | 357 | """Initializes the fake filter.""" |
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[2506] | 358 | self.PrinterName = "FakePrintQueue" |
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| 359 | self.JobSizeBytes = 1 |
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| 360 | |
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| 361 | def printInfo(self, msg, level="info") : |
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[2830] | 362 | """Prints informational message.""" |
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[2506] | 363 | sys.stderr.write("%s : %s\n" % (level.upper(), msg)) |
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| 364 | sys.stderr.flush() |
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| 365 | |
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| 366 | def logdebug(self, msg) : |
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[2830] | 367 | """Prints debug message.""" |
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[2506] | 368 | self.printInfo(msg, "debug") |
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| 369 | |
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| 370 | class fakeAccounter : |
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[2830] | 371 | """Fakes an accounter for testing purposes.""" |
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[2506] | 372 | def __init__(self) : |
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[2830] | 373 | """Initializes fake accounter.""" |
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[2506] | 374 | self.arguments = "snmp:public" |
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| 375 | self.filter = fakeFilter() |
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| 376 | self.protocolHandler = Handler(self, hostname) |
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[2615] | 377 | |
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| 378 | def getLastPageCounter(self) : |
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[2830] | 379 | """Fakes the return of a page counter.""" |
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[2615] | 380 | return 0 |
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[2506] | 381 | |
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| 382 | acc = fakeAccounter() |
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| 383 | return acc.protocolHandler.retrieveInternalPageCounter() |
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| 384 | |
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[2205] | 385 | if __name__ == "__main__" : |
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| 386 | if len(sys.argv) != 2 : |
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| 387 | sys.stderr.write("Usage : python %s printer_ip_address\n" % sys.argv[0]) |
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| 388 | else : |
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| 389 | def _(msg) : |
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| 390 | return msg |
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| 391 | |
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[2506] | 392 | pagecounter = main(sys.argv[1]) |
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| 393 | print "Internal page counter's value is : %s" % pagecounter |
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