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snmp_func.go
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snmp_func.go
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package main
import (
"errors"
"fmt"
"io"
"net"
"sync"
"github.com/k-sone/snmpgo"
)
// https://docs.bmc.com/docs/display/Configipedia/List+of+discoverable+printers
//https://github.com/librenms/librenms-mibs/blob/master/IANA-PRINTER-MIB
//https://github.com/librenms/librenms-mibs/blob/master/Printer-MIB
//https://github.com/librenms/librenms-mibs/blob/master/SAMSUNG-PRINTER-EXT-MIB
//172.26.7.5
//snmpget -v1 -cpublic 172.26.7.5 1.3.6.1.2.1.1.1.0
// snmpwalk -v1 -cpublic 172.26.7.5
// https://exchange.nagios.org/directory/Plugins/Hardware/Printers/check_snmp_printer/details
// https://github.com/coreyramirezgomez/Brother-Printers-Zabbix-Template/blob/master/check_snmp_printer.sh
// https://github.com/PetrKohut/SNMP-printer-library/blob/master/library/Kohut/SNMP/Printer.php
// http://docs.sharpsnmp.com/en/latest/tutorials/device-discovery.html
//https://www.webnms.com/telecom/help/developer_guide/discovery/discovery_process/disc_broadcast.html
// https://en.wikipedia.org/wiki/Service_Location_Protocol
// http://jslp.sourceforge.net/
// https://developer.apple.com/bonjour/printing-specification/bonjourprinting-1.2.pdf
// https://serverfault.com/questions/154650/find-printers-with-nmap
// https://developer.android.com/reference/android/net/nsd/NsdManager.html
// https://sharpsnmplib.codeplex.com/wikipage?title=SNMP%20Device%20Discovery&referringTitle=Documentation
// http://www.snmplink.org/cgi-bin/nd/m/*25[All]%20Draft/Printer-MIB-printmib-04.txt
///usr/libexec/cups/backend/snmp
//HOST-RESOURCES-MIB::hrDeviceType.1 = OID: HOST-RESOURCES-TYPES::hrDevicePrinter
//HOST-RESOURCES-MIB::hrDeviceDescr.1 = STRING: HP LaserJet 4000 Series
////// PRINTER MIB: snmpwalk -v1 -c public 172.26.7.5 1.3.6.1.2.1.43
////https://sourceforge.net/projects/mpsbox/?source=directory
// https://github.com/k-sone/snmpgo/blob/master/examples/snmpgobulkwalk.go
// https://github.com/apple/cups/blob/master/backend/backend-private.h
// http://oid-info.com/get/1.3.6.1.2.1.43
// http://www.ietf.org/rfc/rfc1759.txt
var CUPS_OID = []string{
"1.3.6.1.2.1.1.1.0", // sysDescr
"1.3.6.1.2.1.1.2.0", // sysObjectID
"1.3.6.1.2.1.1.5.0", // sysName
"1.3.6.1.2.1.43.5.1.1.17", // CUPS_OID_prtGeneralSerialNumber
"1.3.6.1.2.1.43.5.1.1.16", // CUPS_OID_prtGeneralPrinterName
"1.3.6.1.2.1.43.10", // CUPS_OID_prtMarker
"1.3.6.1.2.1.43.11.1.1.6.1", // CUPS_OID_prtMarkerSuppliesDescription
"1.3.6.1.2.1.43.11.1.1.8.1", // CUPS_OID_prtMarkerSuppliesMaxCapacity
"1.3.6.1.2.1.43.11.1.1.9.1", // CUPS_OID_prtMarkerSuppliesLevel
}
// http://www.oidview.com/mibs/2590/MC2350-MIB.html
var MINOLTA_OID = []string{
// mltSysDuplexCount 1.3.6.1.4.1.2590.1.1.1.5.7.2.1.3
// mltSysTotalCount 1.3.6.1.4.1.2590.1.1.1.5.7.2.1.1
"1.3.6.1.4.1.2590.1.1.1.5.7.2", // Minolta mltSysSystemCounter
"1.3.6.1.4.1.18334.1.1.1.5.7.2.2.1.5", // Minolta MIB, kmSysPrintFunctionCounterTable
}
// http://www.oidview.com/mibs/11/IJXXXX-MIB.html
var HP_IJXXXX_OID = []string{
// total-mono-page-count 1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.6
// total-color-page-count 1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.7
// duplex-page-count 1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.22
"1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2",
}
// http://www.oidview.com/mibs/2435/BROTHER-MIB.html
var BROTHER_OID = []string{
// Brother printerinfomation
"1.3.6.1.4.1.2435.2.3.9.4.2.1.5.5", // Brother printerinfomation
}
// https://github.com/librenms/librenms-mibs/blob/master/SAMSUNG-PRINTER-EXT-MIB
var SAMSUNG_OID = []string{
"1.3.6.1.4.1.236.11.5.11.55.2.3.17",
"1.3.6.1.4.1.236.11.5.11.55.2.3.20",
}
var EXTRA_OIDS = [][]string{
MINOLTA_OID,
HP_IJXXXX_OID,
BROTHER_OID,
SAMSUNG_OID,
}
var OID2PROP = map[string]string{
"1.3.6.1.2.1.1.1.0": "sysDescr",
"1.3.6.1.2.1.1.2.0": "sysObjectID",
"1.3.6.1.2.1.1.5.0": "sysName",
"1.3.6.1.2.1.43.5.1.1.17.1": "prtGeneralSerialNumber",
"1.3.6.1.2.1.43.5.1.1.16.1": "prtGeneralPrinterName",
"1.3.6.1.2.1.43.10.2.1.1.1.1": "prtMarkerIndex",
"1.3.6.1.2.1.43.10.2.1.2.1.1": "prtMarkerMarkTech",
"1.3.6.1.2.1.43.10.2.1.3.1.1": "prtMarkerCounterUnit",
"1.3.6.1.2.1.43.10.2.1.4.1.1": "prtMarkerLifeCount",
"1.3.6.1.2.1.43.10.2.1.5.1.1": "prtMarkerPowerOnCount",
"1.3.6.1.2.1.43.10.2.1.15.1.1": "prtMarkerStatus",
"1.3.6.1.2.1.43.11.1.1.1": "prtMarkerSuppliesIndex",
// hp
"1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.5.0": "total-engine-page-count",
"1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.6.0": "total-mono-page-count",
"1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.7.0": "total-color-page-count",
"1.3.6.1.4.1.11.2.3.9.4.2.1.4.1.2.22.0": "duplex-page-count",
// brother
"1.3.6.1.4.1.2435.2.3.9.4.2.1.5.5.1": "brInfoSerialNumber",
"1.3.6.1.4.1.2435.2.3.9.4.2.1.5.5.10": "brInfoCounter",
"1.3.6.1.4.1.2435.2.3.9.4.2.1.5.5.17": "brInfoDeviceRomVersion",
// Minolta
"1.3.6.1.4.1.18334.1.1.1.5.7.2.2.1.5.1.1": "copy-counter-black",
"1.3.6.1.4.1.18334.1.1.1.5.7.2.2.1.5.2.1": "copy-counter-color",
"1.3.6.1.4.1.18334.1.1.1.5.7.2.2.1.5.1.2": "print-counter-black",
"1.3.6.1.4.1.18334.1.1.1.5.7.2.2.1.5.2.2": "print-counter-color",
}
func snmpScanOIDS(ip net.IP, oidsToScan []string) (varBinds snmpgo.VarBinds, err error) {
ip = ip.To4()
if ip == nil {
return nil, errors.New("Scan IP failed - IP is not specified!") // not IPv4 address
}
snmp, err := snmpgo.NewSNMP(snmpgo.SNMPArguments{
Version: snmpgo.V2c,
Address: fmt.Sprintf("%v:161", ip),
Retries: 1,
Community: "public",
})
if err != nil {
// log.Printf("Failed to allocate SNMP Request: %v\n", err)
return nil, err
}
oids, err := snmpgo.NewOids(oidsToScan) /*
}*/
if err != nil {
// log.Printf("Failed to parse Oids: %v\n", err)
return nil, err
}
if err = snmp.Open(); err != nil {
// log.Printf("Failed to open connection to %v: %v\n", ip, err)
return
}
defer snmp.Close()
// pdu, err := snmp.GetRequest(oids)
var nonRepeaters = 0
var maxRepetitions = 10
pdu, err := snmp.GetBulkWalk(oids, nonRepeaters, maxRepetitions)
if err != nil {
return nil, err
}
return pdu.VarBinds(), nil
}
func SnmpScan(ip net.IP) (varBinds snmpgo.VarBinds, err error) {
// check if it is a CUPS printer
vBinds, err := snmpScanOIDS(ip, CUPS_OID)
if err != nil {
return nil, err
}
// asynchronously scan for specific manufacturer
var wg sync.WaitGroup
for _, oids := range EXTRA_OIDS {
wg.Add(1)
go func(xip net.IP, xoidx []string) {
defer wg.Done()
vBinds2, _ := snmpScanOIDS(xip, xoidx)
if vBinds2 != nil {
vBinds = append(vBinds, vBinds2...)
}
}(ip, oids)
}
wg.Wait()
return vBinds, nil
}
func SnmpPrint(w io.Writer, ip net.IP, vars snmpgo.VarBinds) {
fmt.Fprintf(w, "[%v]\n", ip)
if vars != nil {
for _, val := range vars {
oidS := val.Oid.String()
prop, ok := OID2PROP[oidS]
if !ok {
prop = oidS
}
fmt.Fprintf(w, "%s = %s\n", prop, val.Variable)
}
}
fmt.Fprintf(w, "\n\n")
}
type JsonVar struct {
Key string
Value string
}
type JsonVars struct {
Ip string
Data map[string]string
}
func Snmp2Json(ip net.IP, vars snmpgo.VarBinds) (ret JsonVars) {
ret = JsonVars{
Ip: ip.String(),
Data: make(map[string]string),
}
if vars != nil {
for _, val := range vars {
oidS := val.Oid.String()
prop, ok := OID2PROP[oidS]
if !ok {
prop = oidS
}
ret.Data[prop] = val.Variable.String()
}
}
return ret
}