Gecko [ lostrivercommunitycenter.com ]

Name	Size	Permission	Date
data	[ DIR ]	drwxr-xr-x	2025-12-23 02:50
afp.lua	73.07 KB	-rw-r--r--	2025-12-18 12:48
ajp.lua	16.66 KB	-rw-r--r--	2025-12-18 12:48
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smtp.lua	19.85 KB	-rw-r--r--	2025-12-18 12:48
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xdmcp.lua	12.09 KB	-rw-r--r--	2025-12-18 12:48
xmpp.lua	15.91 KB	-rw-r--r--	2025-12-18 12:48
zlib.luadoc	4.88 KB	-rw-r--r--	2025-12-18 12:48

Rename

---
-- A minimalistic NDMP (Network Data Management Protocol) library
--
-- @author Patrik Karlsson <patrik@cqure.net>
--

local match = require "match"
local nmap = require "nmap"
local os = require "os"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
_ENV = stdnse.module("ndmp", stdnse.seeall)

NDMP = {

-- Message types
  MessageType = {
    CONFIG_GET_HOST_INFO = 0x00000100,
    CONFIG_GET_FS_INFO = 0x00000105,
    CONFIG_GET_AUTH_ATTR = 0x00000103,
    CONFIG_GET_SERVER_INFO = 0x00000108,
    CONNECT_CLIENT_AUTH = 0x00000901,
  },

-- Error types
  ErrorType = {
    NOT_AUTHORIZED_ERROR = 0x00000004
  },

-- The fragment header, 4 bytes where the highest bit is used to determine
  -- whether the fragment is the last or not.
  FragmentHeader = {
    size = 4,

-- Creates a new instance of fragment header
    -- @return o instance of Class
    new = function(self)
      local o = {
        last = true,
        length = 24,
      }
      setmetatable(o, self)
      self.__index = self
      return o
    end,

-- Parse data stream and create a new instance of this class
    -- @param data opaque string
    -- @return fh new instance of FragmentHeader class
    parse = function(data)
      local fh = NDMP.FragmentHeader:new()
      local tmp = string.unpack(">I4", data)
      fh.length = (tmp & 0x7fffffff)
      fh.last= (tmp >> 31)
      return fh
    end,

-- Serializes the instance to an opaque string
    -- @return str string containing the serialized class
    __tostring = function(self)
      local tmp = 0
      if ( self.last ) then
        tmp = 0x80000000
      end
      tmp = tmp + self.length
      return string.pack(">I4", tmp)
    end,

-- The ndmp 24 byte header
  Header = {
    size = 24,

-- creates a new instance of Header
    -- @return o instance of Header
    new = function(self)
      local o = {
        seq = 0,
        time = os.time(),
        type = 0,
        msg = 0x00000108,
        reply_seq = 0,
        error = 0,
      }
      setmetatable(o, self)
      self.__index = self
      return o
    end,

-- Create a Header instance from opaque data string
    -- @param data opaque string
    -- @return hdr new instance of Header
    parse = function(data)
      local hdr = NDMP.Header:new()
      hdr.seq, hdr.time, hdr.type, hdr.msg, hdr.reply_seq, hdr.error = string.unpack(">I4I4I4I4I4I4", data)
      return hdr
    end,

-- Serializes the instance to an opaque string
    -- @return str string containing the serialized class instance
    __tostring = function(self)
      return string.pack(">I4I4I4I4I4I4", self.seq, self.time, self.type, self.msg, self.reply_seq, self.error)
    end,

},
}

NDMP.Message = {}

NDMP.Message.ConfigGetServerInfo = {

-- Creates a Config Server Info instance
  -- @return o new instance of Class
  new = function(self)
    local o = {
      frag_header = NDMP.FragmentHeader:new(),
      header = NDMP.Header:new(),
      data = nil,
    }
    o.header.msg = NDMP.MessageType.CONFIG_GET_SERVER_INFO
    setmetatable(o, self)
    self.__index = self
    return o
  end,

-- Create a ConfigGetServerInfo instance from opaque data string
  -- @param data opaque string
  -- @return msg new instance of ConfigGetServerInfo
  parse = function(data)
    local msg = NDMP.Message.ConfigGetServerInfo:new()
    msg.frag_header = NDMP.FragmentHeader.parse(data)
    data = data:sub(NDMP.FragmentHeader.size + 1)
    msg.header = NDMP.Header.parse(data)
    msg.data = data:sub(NDMP.Header.size + 1)

msg.serverinfo = {}
    local err, pos = string.unpack(">I4", msg.data)
    pos, msg.serverinfo.vendor = Util.parseString(msg.data, pos)
    pos, msg.serverinfo.product = Util.parseString(msg.data, pos)
    pos, msg.serverinfo.version = Util.parseString(msg.data, pos)
    return msg
  end,

-- Serializes the instance to an opaque string
  -- @return str string containing the serialized class instance
  __tostring = function(self)
    return tostring(self.frag_header) .. tostring(self.header) .. tostring(self.data or "")
  end,

}

NDMP.Message.ConfigGetHostInfo = {
  new = function(self)
    local o = {
      frag_header = NDMP.FragmentHeader:new(),
      header = NDMP.Header:new(),
      data = nil,
    }
    o.header.msg = NDMP.MessageType.CONFIG_GET_HOST_INFO
    setmetatable(o, self)
    self.__index = self
    return o
  end,

parse = function(data)
    local msg = NDMP.Message.ConfigGetServerInfo:new()
    msg.frag_header = NDMP.FragmentHeader.parse(data)
    data = data:sub(NDMP.FragmentHeader.size + 1)
    msg.header = NDMP.Header.parse(data)
    if ( msg.header.error == NDMP.ErrorType.NOT_AUTHORIZED_ERROR ) then
      -- no data to parse
      return msg
    end
    msg.data = data:sub(NDMP.Header.size + 1)

msg.hostinfo = {}
    local err, pos = string.unpack(">I4", msg.data)
    pos, msg.hostinfo.hostname = Util.parseString(msg.data, pos)
    pos, msg.hostinfo.ostype = Util.parseString(msg.data, pos)
    pos, msg.hostinfo.osver = Util.parseString(msg.data, pos)
    pos, msg.hostinfo.hostid = Util.parseString(msg.data, pos)
    return msg
  end,

__tostring = function(self)
    return tostring(self.frag_header) .. tostring(self.header) .. tostring(self.data or "")
  end,
}

NDMP.Message.ConfigGetFsInfo = {

new = function(self)
    local o = {
      frag_header = NDMP.FragmentHeader:new(),
      header = NDMP.Header:new(),
      data = nil,
      fsinfo = {},
    }
    o.header.msg = NDMP.MessageType.CONFIG_GET_FS_INFO
    setmetatable(o, self)
    self.__index = self
    return o
  end,

parse = function(data)
    local msg = NDMP.Message.ConfigGetFsInfo:new()
    msg.frag_header = NDMP.FragmentHeader.parse(data)
    data = data:sub(NDMP.FragmentHeader.size + 1)
    msg.header = NDMP.Header.parse(data)
    if ( msg.header.error == NDMP.ErrorType.NOT_AUTHORIZED_ERROR ) then
      -- no data to parse
      return msg
    end
    msg.data = data:sub(NDMP.Header.size + 1)

local err, count, pos = string.unpack(">I4I4", msg.data)
    for i=1, count do
      local item = {}
      item.invalid, pos = string.unpack(">I4", msg.data, pos)
      pos, item.fs_type = Util.parseString(msg.data, pos)
      pos, item.fs_logical_device = Util.parseString(msg.data, pos)
      pos, item.fs_physical_device = Util.parseString(msg.data, pos)
      item.total_size,
      item.used_size,
      item.avail_size,
      item.total_inodes,
      item.used_inodes, pos = string.unpack(">I8I8I8I8I8", msg.data, pos)
      pos, item.fs_env = Util.parseString(msg.data, pos)
      pos, item.fs_status = Util.parseString(msg.data, pos)
      table.insert(msg.fsinfo, item)
    end
    return msg
  end,

__tostring = function(self)
    return tostring(self.frag_header) .. tostring(self.header) .. tostring(self.data or "")
  end,
}

NDMP.Message.UnhandledMessage = {

new = function(self)
    local o = {
      frag_header = NDMP.FragmentHeader:new(),
      header = NDMP.Header:new(),
      data = nil,
    }
    setmetatable(o, self)
    self.__index = self
    return o
  end,

parse = function(data)
    local msg = NDMP.Message.ConfigGetFsInfo:new()
    msg.frag_header = NDMP.FragmentHeader.parse(data)
    data = data:sub(NDMP.FragmentHeader.size + 1)
    msg.header = NDMP.Header.parse(data)
    msg.data = data:sub(NDMP.Header.size + 1)
    return msg
  end,

__tostring = function(self)
    return tostring(self.frag_header) .. tostring(self.header) .. tostring(self.data or "")
  end

}

Util = {

parseString = function(data, pos)
    local str, pos = string.unpack(">s4", data, pos)
    local pad = ( 4 - ( #str % 4 ) ~= 4 ) and 4 - ( #str % 4 ) or 0
    return pos + pad, str

end,

}

NDMP.TypeToMessage = {
  [NDMP.MessageType.CONFIG_GET_SERVER_INFO] = NDMP.Message.ConfigGetServerInfo,
  [NDMP.MessageType.CONFIG_GET_HOST_INFO] = NDMP.Message.ConfigGetHostInfo,
  [NDMP.MessageType.CONFIG_GET_FS_INFO] = NDMP.Message.ConfigGetFsInfo,
}

-- Handles the communication with the NDMP service
Comm = {

-- Creates new Comm instance
  -- @param host table as received by the action method
  -- @param port table as received by the action method
  -- @return o new instance of Comm
  new = function(self, host, port)
    local o = {
      host = host,
      port = port,
      socket = nmap.new_socket(),
      seq = 0,
      in_queue = {},
    }
    setmetatable(o, self)
    self.__index = self
    return o
  end,

-- Connects to the NDMP server
  -- @return status true on success, false on failure
  connect = function(self)
    -- some servers seem to take their time, so leave this as 10s for now
    self.socket:set_timeout(10000)
    return self.socket:connect(self.host, self.port)
  end,

-- Receives a message from the server
  -- @return status true on success, false on failure
  -- @return msg NDMP message when a parser exists, otherwise nil
  sock_recv = function(self)
    local status, frag_data = self.socket:receive_buf(match.numbytes(4), true)
    if ( not(status) ) then
      return false, "Failed to read NDMP 4-byte fragment header"
    end
    local frag_header = NDMP.FragmentHeader.parse(frag_data)

local status, header_data = self.socket:receive_buf(match.numbytes(24), true)
    if ( not(status) ) then
      return false, "Failed to read NDMP 24-byte header"
    end
    local header = NDMP.Header.parse(header_data)

local status, data = self.socket:receive_buf(match.numbytes(frag_header.length - 24), true)
    if ( not(status) ) then
      return false, "Failed to read NDMP data"
    end

if ( NDMP.TypeToMessage[header.msg] ) then
      return true, NDMP.TypeToMessage[header.msg].parse(frag_data .. header_data .. data)
    end
    return true, NDMP.Message.UnhandledMessage.parse(frag_data .. header_data .. data)
  end,

recv = function(self)
    if ( #self.in_queue > 0 ) then
      return true, table.remove(self.in_queue, 1)
    end
    return self:sock_recv()
  end,

-- Sends a message to the server
  -- @param msg NDMP message
  -- @return status true on success, false on failure
  -- @return err string containing the error message when status is false
  send = function(self, msg)
    self.seq = self.seq + 1
    msg.header.seq = self.seq
    return self.socket:send(tostring(msg))
  end,

exch = function(self, msg)
    local status, err = self:send(msg)
    if ( not(status) ) then
      return false, "Failed to send ndmp Message to server"
    end
    local s_seq = msg.header.seq

for k, v in ipairs(self.in_queue) do
      if ( v.reply_seq == s_seq ) then
        return true, table.remove(self.in_queue, k)
      end
    end

while(true) do
      local reply
      status, reply = self:sock_recv()
      if ( not(status) ) then
        return false, "Failed to receive msg from server"
      elseif ( reply and reply.header and reply.header.reply_seq == s_seq ) then
        return true, reply
      else
        table.insert(self.in_queue, reply)
      end
    end
  end,

close = function(self) return self.socket:close() end,

}

Helper = {

new = function(self, host, port)
    local o = { comm = Comm:new(host, port) }
    setmetatable(o, self)
    self.__index = self
    return o
  end,

connect = function(self)
    return self.comm:connect()
  end,

getFsInfo = function(self)
    return self.comm:exch(NDMP.Message.ConfigGetFsInfo:new())
  end,

getHostInfo = function(self)
    return self.comm:exch(NDMP.Message.ConfigGetHostInfo:new())
  end,

getServerInfo = function(self)
    return self.comm:exch(NDMP.Message.ConfigGetServerInfo:new())
  end,

close = function(self)
    return self.comm:close()

end

}

return _ENV;