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Merge r18534:r18591 from nmap-exp/djalal/nse-nfs/
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djalal
@@ -1,21 +1,22 @@
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description = [[
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Retrieves disk space statistics from the remote NFS share
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Retrieves disk space statistics and information from the remote NFS
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share. This script will try to emulate the behaviour of the "df" tool.
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The script will provide pathconf information of the remote NFS if
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the version used is NFSv3.
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]]
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---
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-- @output
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-- PORT STATE SERVICE
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-- | nfs-statfs:
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-- | /home/storage/backup
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-- | Block size: 512
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-- | Total blocks: 1901338728
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-- | Free blocks: 729769328
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-- | Available blocks: 633186880
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-- | /home
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-- | Block size: 512
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-- | Total blocks: 1901338728
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-- | Free blocks: 729769328
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-- |_ Available blocks: 633186880
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-- | nfs-statfs:
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-- |
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-- | Filesystem 1K-blocks Used Available Use% Blocksize
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-- | /mnt/nfs/files 5542276 2732012 2528728 52% 4096
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-- |_ /mnt/nfs/opensource 5534416 620640 4632644 12% 4096
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--
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-- @args nfs-statfs.human If set to '1' or 'true' shows the filesystem
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-- size in the human readable format.
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--
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-- Version 0.3
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@@ -23,43 +24,185 @@ Retrieves disk space statistics from the remote NFS share
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-- Created 01/25/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
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-- Revised 02/22/2010 - v0.2 - adapted to support new RPC library
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-- Revised 03/13/2010 - v0.3 - converted host to port rule
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-- Revised 06/28/2010 - v0.4 - added NFSv3 support and doc
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author = "Patrik Karlsson"
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author = "Patrik Karlsson, Djalal Harouni"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"discovery", "safe"}
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require("shortport")
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require("rpc")
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require("tab")
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portrule = shortport.port_or_service(111, "rpcbind", {"tcp", "udp"} )
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action = function(host, port)
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local result, entry = {}, {}
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local status, mounts = rpc.Helper.ShowMounts( host, port )
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if ( not(status) ) then
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return stdnse.format_output(false, mounts)
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end
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for _, v in ipairs( mounts ) do
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local entry = {}
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local status, stats = rpc.Helper.ExportStats(host, port, v.name)
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entry.name = v.name
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if (not(status)) then
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table.insert(entry, string.format("ERROR: %s", stats))
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else
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table.insert( entry, string.format("Block size: %d", stats.block_size) )
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table.insert( entry, string.format("Total blocks: %d", stats.total_blocks) )
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table.insert( entry, string.format("Free blocks: %d", stats.free_blocks) )
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table.insert( entry, string.format("Available blocks: %d", stats.available_blocks) )
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end
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table.insert( result, entry )
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end
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return stdnse.format_output( true, result )
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local function table_fsstat(nfs, mount, stats)
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local fs, err = rpc.Util.calc_fsstat_table(stats, nfs.version, nfs.human)
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if fs == nil then
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return false, err
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end
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fs.filesystem = string.format("%s", mount)
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return true, fs
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end
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local function table_fsinfo(nfs, fsinfo)
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local ret = {}
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local fs, err = rpc.Util.calc_fsinfo_table(fsinfo, nfs.version, nfs.human)
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if fs == nil then
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return false, err
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end
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ret.maxfilesize = fs.maxfilesize
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return true, ret
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end
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local function table_pathconf(nfs, pconf)
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local ret = {}
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local fs, err = rpc.Util.calc_pathconf_table(pconf, nfs.version)
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if fs == nil then
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return false, err
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end
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ret.linkmax = fs.linkmax
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return true, ret
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end
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local function report(nfs, tables)
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local outtab, tab_size, tab_avail
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local tab_filesys, tab_used, tab_use,
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tab_bs, tab_maxfs, tab_linkmax = " Filesystem",
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"Used", "Use%", "Blocksize", "Maxfilesize", "Maxlink"
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if nfs.human then
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tab_size = "Size"
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tab_avail = "Avail"
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else
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tab_size = "1K-blocks"
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tab_avail = "Available"
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end
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if nfs.version == 2 then
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outtab = tab.new(6)
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tab.nextrow(outtab)
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tab.addrow(outtab, tab_filesys, tab_size, tab_used,
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tab_avail, tab_use, tab_bs)
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for _, t in ipairs(tables) do
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tab.nextrow(outtab)
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tab.addrow(outtab, (" %s"):format(t.filesystem), t.size,
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t.used, t.available, t.use, t.bsize)
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end
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elseif nfs.version == 3 then
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outtab = tab.new(7)
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tab.nextrow(outtab)
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tab.addrow(outtab, tab_filesys, tab_size, tab_used,
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tab_avail, tab_use, tab_maxfs, tab_linkmax)
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for _, t in ipairs(tables) do
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tab.nextrow(outtab)
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tab.addrow(outtab, (" %s"):format(t.filesystem), t.size,
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t.used, t.available, t.use, t.maxfilesize,
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t.linkmax)
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end
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end
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return tab.dump(outtab)
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end
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local function nfs_filesystem_info(nfs, mount, filesystem)
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local results, res, status = {}, {}
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local nfsobj = rpc.NFS:new()
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local mnt_comm, nfs_comm, fhandle
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mnt_comm, fhandle = rpc.Helper.MountPath(nfs.host, nfs.port, mount)
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if mnt_comm == nil then
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return false, fhandle
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end
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local nfs_comm, status = rpc.Helper.NfsOpen(nfs.host, nfs.port)
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if nfs_comm == nil then
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rpc.Helper.UnmountPath(mnt_comm, mount)
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return false, status
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end
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nfs.version = nfs_comm.version
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-- use simple check since NFSv1 is not used anymore.
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if (mnt_comm.version ~= nfs_comm.version) then
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rpc.Helper.UnmountPath(mnt_comm, mount)
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return false, string.format("versions mismatch, nfs v%d - mount v%d",
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nfs_comm.version, mnt_comm.version)
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end
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if nfs_comm.version < 3 then
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status, res = nfsobj:StatFs(nfs_comm, fhandle)
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elseif nfs_comm.version == 3 then
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status, res = nfsobj:FsStat(nfs_comm, fhandle)
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end
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if status then
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status, res = table_fsstat(nfs, mount, res)
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if status then
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for k, v in pairs(res) do
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results[k] = v
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end
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end
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if nfs_comm.version == 3 then
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status, res = nfsobj:FsInfo(nfs_comm, fhandle)
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if status then
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status, res = table_fsinfo(nfs, res)
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if status then
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for k, v in pairs(res) do
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results[k] = v
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end
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end
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end
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status, res = nfsobj:PathConf(nfs_comm, fhandle)
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if status then
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status, res = table_pathconf(nfs, res)
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if status then
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for k, v in pairs(res) do
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results[k] = v
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end
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end
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end
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end
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end
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rpc.Helper.NfsClose(nfs_comm)
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rpc.Helper.UnmountPath(mnt_comm, mount)
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if (not(status)) then
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return status, res
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end
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table.insert(filesystem, results)
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return true, nil
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end
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action = function(host, port)
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local o, fs_info, mounts, status = {}, {}, {}, {}
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local nfs_info =
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{
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host = host,
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port = port,
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human = nmap.registry.args['nfs-statfs.human'] or nil,
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}
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status, mounts = rpc.Helper.ShowMounts( host, port )
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if (not(status)) then
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return stdnse.format_output(false, mounts)
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end
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for _, v in ipairs(mounts) do
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local err
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status, err = nfs_filesystem_info(nfs_info, v.name, fs_info)
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if (not(status)) then
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return stdnse.format_output(false, err)
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end
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end
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table.insert(o, report(nfs_info, fs_info))
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return stdnse.format_output(true, o)
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end
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