SNMP protocol in Logic Machine

[admin]

Use this code to walk through SNMP:

Code:

function walk(peer, community, version, root)
  local snmp = require('snmp')
  local session, err = snmp.open({
    peer = peer,
    community = community or 'public',
    version = version or snmp.SNMPv1
  })

  if not session then
    return nil, 'unable to open session: ' .. tostring(err)
  end

  root = root or '1'

  local vb = { oid = root }
  local err
  local res = {}

  while true do
    vb, err = session:getnext(vb)

    if err then
      break
    elseif string.find(vb.oid, root) == nil or vb.type == snmp.ENDOFMIBVIEW then
      break
    else
      res[ vb.oid ] = vb.value
    end
  end

  session:close()

  if err then
    return nil, 'walk failed: ' .. tostring(err)
  else
    return res
  end
end

res, err = walk('192.168.1.1', 'public', snmp.SNMPv1, '1.0.8802.1.1.2.1.3')
log(res, err)

Arguments for walk:
1. remote device IP
2. community, defaults to 'public'
3. version, defaults to v1
4. root SNMP node, defaults to '1'

SNMP library info: http://luasnmp.luaforge.net/