1 snmp = require('snmp-native')

     2 snmpTypes = require('./snmp-types').snmpTypes

     3 typeStr = require('./snmp-types').typeStr

     4 

     5 

     6 ###

     7 Converts TimeTicks value to easy-to-use structure.

     8 ###

     9 convertTimeTicks = (v) ->

    10   intDiv = (a, b) -> Math.floor(a / b)

    11   msec = v % 100

    12   v = intDiv(v, 100)

    13   secs = v % 60

    14   v = intDiv(v, 60)

    15   mins = v % 60

    16   v = intDiv(v, 60)

    17   hours = v % 24

    18   days = intDiv(v, 24)

    19   

    20   days: days

    21   hours: hours

    22   mins: mins

    23   secs: secs

    24   msecs: msec

    25 

    26 ###

    27 Processes SNMP result value.

    28 ###

    29 processVarBind = (vb) ->

    30   rv =

    31     oid: "." + vb.oid.reduce (x,y) -> x+"."+y

    32     value: vb.value

    33     type: vb.type

    34     typeStr: typeStr[vb.type] ? 'Unknown'

    35     ts: Date.now() / 1000

    36   if (rv.type == snmpTypes.TimeTicks)

    37     rv.timeTicks = convertTimeTicks(vb.value)

    38   rv

    39 

    40 ###

    41 Creates SNMP session and retrieves values for the supplied OIDs.

    42 ###

    43 snmpget = (opts, cb) ->

    44   sess = new snmp.Session(opts)

    45   res = []

    46   snmpgetOne = (i) ->

    47     if (i < opts.oids.length)

    48       oid = opts.oids[i]

    49       sess.get({oid: oid}, (err, vbs) ->

    50         if (err)

    51           res.push { error: err, oid: oid }

    52           if (opts.abortOnError)

    53             i = opts.oids.length

    54         else

    55           res.push vbs.map(processVarBind)...

    56         snmpgetOne ++i

    57       )

    58     else

    59       sess.close()

    60       cb(res)

    61   snmpgetOne 0

    62 

    63 exports.snmpget = snmpget