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o [NSE] Added snmpWalk function to SNMP library and updated scripts to use it

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[Patrik]
This commit is contained in:
patrik
2010-04-12 10:30:24 +00:00
parent a9c5d3391c
commit 112f8f5340
9 changed files with 128 additions and 355 deletions
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60
scripts/snmp-interfaces.nse
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@@ -19,7 +19,8 @@ dependencies = {"snmp-brute"}
-- code borrowed heavily from Patrik Karlsson's excellent snmp scripts
-- Created 03/03/2010 - v0.1 - created by Thomas Buchanan <tbuchanan@thecompassgrp.net>
-- 03/05/2010 - v0.2 - Reworked output slighty, moved iana_types to script scope. Suggested by David Fifield
-- Revised 03/05/2010 - v0.2 - Reworked output slighty, moved iana_types to script scope. Suggested by David Fifield
-- Revised 04/11/2010 - v0.2 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
@@ -70,51 +71,6 @@ local iana_types = { "other", "regular1822", "hdh1822", "ddnX25", "rfc877x25", "
"x86Laps", "wwanPP", "wwanPP2", "voiceEBS", "ifPwType", "ilan", "pip", "aluELP", "gpon",
"vdsl2", "capwapDot11Profile", "capwapDot11Bss", "capwapWtpVirtualRadio" }
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -396,14 +352,16 @@ action = function(host, port)
local ip_oid = "1.3.6.1.2.1.4.20"
local interfaces = {}
local ips = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
-- retreive network interface information from IF-MIB
interfaces = snmp_walk( socket, if_oid )
if ( interfaces == nil ) or ( #interfaces == 0 ) then
status, interfaces = snmp.snmpWalk( socket, if_oid )
socket:close()
if (not(status)) or ( interfaces == nil ) or ( #interfaces == 0 ) then
return
end
@@ -414,10 +372,10 @@ action = function(host, port)
-- retreive IP address information from IP-MIB
try(socket:connect(host.ip, port.number, "udp"))
ips = snmp_walk( socket, ip_oid )
status, ips = snmp.snmpWalk( socket, ip_oid )
-- associate that IP address information with the correct interface
if ( ips ~= nil ) and ( #ips ~= 0 ) then
if (not(status)) or ( ips ~= nil ) and ( #ips ~= 0 ) then
interfaces = process_ips( interfaces, ips )
end