mirror of
https://github.com/nmap/nmap.git
synced 2026-01-06 06:29:03 +00:00
Re-indent some NSE libraries.
https://secwiki.org/w/Nmap/Code_Standards
This commit is contained in:
dmiller
@@ -17,8 +17,8 @@ _ENV = stdnse.module("netbios", stdnse.seeall)
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types = {
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NB = 32,
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NBSTAT = 33,
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NB = 32,
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NBSTAT = 33,
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}
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--- Encode a NetBIOS name for transport. Most packets that use the NetBIOS name
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@@ -39,45 +39,45 @@ types = {
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-- (eg. "\x20FEEFFDFEDBCACACACACACACACACAAA\x08insecure\x03org")
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function name_encode(name, scope)
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stdnse.print_debug(3, "Encoding name '%s'", name)
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-- Truncate or pad the string to 16 bytes
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if(#name >= 16) then
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name = string.sub(name, 1, 16)
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else
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local padding = " "
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if name == "*" then
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padding = "\0"
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end
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stdnse.print_debug(3, "Encoding name '%s'", name)
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-- Truncate or pad the string to 16 bytes
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if(#name >= 16) then
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name = string.sub(name, 1, 16)
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else
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local padding = " "
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if name == "*" then
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padding = "\0"
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end
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repeat
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name = name .. padding
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until #name == 16
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end
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repeat
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name = name .. padding
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until #name == 16
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end
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-- Convert to uppercase
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name = string.upper(name)
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-- Convert to uppercase
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name = string.upper(name)
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-- Do the L1 encoding
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local L1_encoded = ""
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for i=1, #name, 1 do
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local b = string.byte(name, i)
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L1_encoded = L1_encoded .. string.char(bit.rshift(bit.band(b, 0xF0), 4) + 0x41)
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L1_encoded = L1_encoded .. string.char(bit.rshift(bit.band(b, 0x0F), 0) + 0x41)
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end
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-- Do the L1 encoding
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local L1_encoded = ""
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for i=1, #name, 1 do
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local b = string.byte(name, i)
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L1_encoded = L1_encoded .. string.char(bit.rshift(bit.band(b, 0xF0), 4) + 0x41)
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L1_encoded = L1_encoded .. string.char(bit.rshift(bit.band(b, 0x0F), 0) + 0x41)
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end
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-- Do the L2 encoding
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local L2_encoded = string.char(32) .. L1_encoded
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-- Do the L2 encoding
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local L2_encoded = string.char(32) .. L1_encoded
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if scope ~= nil then
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-- Split the scope at its periods
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local piece
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for piece in string.gmatch(scope, "[^.]+") do
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L2_encoded = L2_encoded .. string.char(#piece) .. piece
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end
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end
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if scope ~= nil then
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-- Split the scope at its periods
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local piece
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for piece in string.gmatch(scope, "[^.]+") do
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L2_encoded = L2_encoded .. string.char(#piece) .. piece
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end
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end
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stdnse.print_debug(3, "=> '%s'", L2_encoded)
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return L2_encoded
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stdnse.print_debug(3, "=> '%s'", L2_encoded)
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return L2_encoded
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end
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@@ -89,38 +89,38 @@ end
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--@return the decoded name and the scope. The name will still be padded, and the
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-- scope will never be nil (empty string is returned if no scope is present)
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function name_decode(encoded_name)
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local name = ""
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local scope = ""
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local name = ""
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local scope = ""
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local len = string.byte(encoded_name, 1)
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local i
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local len = string.byte(encoded_name, 1)
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local i
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stdnse.print_debug(3, "Decoding name '%s'", encoded_name)
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stdnse.print_debug(3, "Decoding name '%s'", encoded_name)
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for i = 2, len + 1, 2 do
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local ch = 0
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ch = bit.bor(ch, bit.lshift(string.byte(encoded_name, i) - 0x41, 4))
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ch = bit.bor(ch, bit.lshift(string.byte(encoded_name, i + 1) - 0x41, 0))
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for i = 2, len + 1, 2 do
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local ch = 0
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ch = bit.bor(ch, bit.lshift(string.byte(encoded_name, i) - 0x41, 4))
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ch = bit.bor(ch, bit.lshift(string.byte(encoded_name, i + 1) - 0x41, 0))
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name = name .. string.char(ch)
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end
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name = name .. string.char(ch)
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end
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-- Decode the scope
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local pos = 34
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while #encoded_name > pos do
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local len = string.byte(encoded_name, pos)
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scope = scope .. string.sub(encoded_name, pos + 1, pos + len) .. "."
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pos = pos + 1 + len
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end
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-- Decode the scope
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local pos = 34
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while #encoded_name > pos do
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local len = string.byte(encoded_name, pos)
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scope = scope .. string.sub(encoded_name, pos + 1, pos + len) .. "."
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pos = pos + 1 + len
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end
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-- If there was a scope, remove the trailing period
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if(#scope > 0) then
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scope = string.sub(scope, 1, #scope - 1)
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end
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-- If there was a scope, remove the trailing period
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if(#scope > 0) then
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scope = string.sub(scope, 1, #scope - 1)
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end
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stdnse.print_debug(3, "=> '%s'", name)
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stdnse.print_debug(3, "=> '%s'", name)
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return name, scope
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return name, scope
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end
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--- Sends out a UDP probe on port 137 to get a human-readable list of names the
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@@ -131,23 +131,23 @@ end
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-- list of names. Otherwise, result is an error message.
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function get_names(host, prefix)
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local status, names, statistics = do_nbstat(host)
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local status, names, statistics = do_nbstat(host)
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if(prefix == nil) then
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prefix = ""
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end
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if(prefix == nil) then
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prefix = ""
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end
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if(status) then
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local result = ""
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for i = 1, #names, 1 do
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result = result .. string.format("%s%s<%02x>\n", prefix, names[i]['name'], names[i]['prefix'])
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end
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if(status) then
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local result = ""
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for i = 1, #names, 1 do
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result = result .. string.format("%s%s<%02x>\n", prefix, names[i]['name'], names[i]['prefix'])
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end
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return true, result
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else
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return false, names
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end
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return true, result
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else
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return false, names
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end
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end
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--- Sends out a UDP probe on port 137 to get the server's name (that is, the
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@@ -158,24 +158,24 @@ end
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-- otherwise, result is an error message.
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function get_server_name(host, names)
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local status
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local i
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local status
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local i
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if names == nil then
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status, names = do_nbstat(host)
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if names == nil then
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status, names = do_nbstat(host)
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if(status == false) then
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return false, names
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end
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end
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if(status == false) then
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return false, names
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end
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end
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for i = 1, #names, 1 do
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if names[i]['suffix'] == 0x20 then
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return true, names[i]['name']
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end
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end
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for i = 1, #names, 1 do
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if names[i]['suffix'] == 0x20 then
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return true, names[i]['name']
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end
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end
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return false, "Couldn't find NetBIOS server name"
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return false, "Couldn't find NetBIOS server name"
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end
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--- Sends out a UDP probe on port 137 to get the user's name (that is, the
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@@ -188,27 +188,27 @@ end
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-- otherwise, result is an error message.
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function get_user_name(host, names)
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local status, server_name = get_server_name(host, names)
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local status, server_name = get_server_name(host, names)
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if(status == false) then
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return false, server_name
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end
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if(status == false) then
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return false, server_name
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end
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if(names == nil) then
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status, names = do_nbstat(host)
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if(names == nil) then
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status, names = do_nbstat(host)
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if(status == false) then
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return false, names
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end
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end
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if(status == false) then
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return false, names
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end
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end
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for i = 1, #names, 1 do
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if names[i]['suffix'] == 0x03 and names[i]['name'] ~= server_name then
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return true, names[i]['name']
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end
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end
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for i = 1, #names, 1 do
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if names[i]['suffix'] == 0x03 and names[i]['name'] ~= server_name then
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return true, names[i]['name']
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end
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end
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return true, nil
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return true, nil
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end
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@@ -260,204 +260,204 @@ end
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-- Otherwise, names is an error message and statistics is undefined.
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function do_nbstat(host)
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local status, err
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local socket = nmap.new_socket()
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local encoded_name = name_encode("*")
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local statistics
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local reg
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if type(host) == "string" then --ip
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stdnse.print_debug(3, "Performing nbstat on host '%s'", host)
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nmap.registry.netbios = nmap.registry.netbios or {}
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nmap.registry.netbios[host] = nmap.registry.netbios[host] or {}
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reg = nmap.registry.netbios[host]
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else
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stdnse.print_debug(3, "Performing nbstat on host '%s'", host.ip)
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if host.registry.netbios == nil and
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nmap.registry.netbios ~= nil and
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nmap.registry.netbios[host.ip] ~= nil then
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host.registry.netbios = nmap.registry.netbios[host.ip]
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end
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host.registry.netbios = host.registry.netbios or {}
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reg = host.registry.netbios
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end
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local status, err
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local socket = nmap.new_socket()
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local encoded_name = name_encode("*")
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local statistics
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local reg
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if type(host) == "string" then --ip
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stdnse.print_debug(3, "Performing nbstat on host '%s'", host)
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nmap.registry.netbios = nmap.registry.netbios or {}
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nmap.registry.netbios[host] = nmap.registry.netbios[host] or {}
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reg = nmap.registry.netbios[host]
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else
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stdnse.print_debug(3, "Performing nbstat on host '%s'", host.ip)
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if host.registry.netbios == nil and
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nmap.registry.netbios ~= nil and
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nmap.registry.netbios[host.ip] ~= nil then
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host.registry.netbios = nmap.registry.netbios[host.ip]
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end
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host.registry.netbios = host.registry.netbios or {}
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reg = host.registry.netbios
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end
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-- Check if it's cached in the registry for this host
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if(reg["nbstat_names"] ~= nil) then
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stdnse.print_debug(3, " |_ [using cached value]")
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return true, reg["nbstat_names"], reg["nbstat_statistics"]
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end
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-- Check if it's cached in the registry for this host
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if(reg["nbstat_names"] ~= nil) then
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stdnse.print_debug(3, " |_ [using cached value]")
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return true, reg["nbstat_names"], reg["nbstat_statistics"]
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end
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-- Create the query header
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local query = bin.pack(">SSSSSS",
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0x1337, -- Transaction id
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0x0000, -- Flags
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1, -- Questions
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0, -- Answers
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0, -- Authority
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0 -- Extra
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)
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-- Create the query header
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local query = bin.pack(">SSSSSS",
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0x1337, -- Transaction id
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0x0000, -- Flags
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1, -- Questions
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0, -- Answers
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0, -- Authority
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0 -- Extra
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)
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query = query .. bin.pack(">zSS",
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encoded_name, -- Encoded name
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0x0021, -- Query type (0x21 = NBSTAT)
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0x0001 -- Class = IN
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)
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status, err = socket:connect(host, 137, "udp")
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if(status == false) then
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return false, err
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end
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query = query .. bin.pack(">zSS",
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encoded_name, -- Encoded name
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0x0021, -- Query type (0x21 = NBSTAT)
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0x0001 -- Class = IN
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)
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status, err = socket:connect(host, 137, "udp")
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if(status == false) then
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return false, err
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end
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status, err = socket:send(query)
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if(status == false) then
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return false, err
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end
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status, err = socket:send(query)
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if(status == false) then
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return false, err
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end
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socket:set_timeout(1000)
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socket:set_timeout(1000)
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local status, result = socket:receive_bytes(1)
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if(status == false) then
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return false, result
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end
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local status, result = socket:receive_bytes(1)
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if(status == false) then
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return false, result
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end
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local close_status, err = socket:close()
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if(close_status == false) then
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return false, err
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end
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local close_status, err = socket:close()
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if(close_status == false) then
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return false, err
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end
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if(status) then
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local pos, TRN_ID, FLAGS, QDCOUNT, ANCOUNT, NSCOUNT, ARCOUNT, rr_name, rr_type, rr_class, rr_ttl
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local rrlength, name_count
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if(status) then
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local pos, TRN_ID, FLAGS, QDCOUNT, ANCOUNT, NSCOUNT, ARCOUNT, rr_name, rr_type, rr_class, rr_ttl
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local rrlength, name_count
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pos, TRN_ID, FLAGS, QDCOUNT, ANCOUNT, NSCOUNT, ARCOUNT = bin.unpack(">SSSSSS", result)
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pos, TRN_ID, FLAGS, QDCOUNT, ANCOUNT, NSCOUNT, ARCOUNT = bin.unpack(">SSSSSS", result)
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-- Sanity check the result (has to have the same TRN_ID, 1 answer, and proper flags)
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if(TRN_ID ~= 0x1337) then
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return false, string.format("Invalid transaction ID returned: 0x%04x", TRN_ID)
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end
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if(ANCOUNT ~= 1) then
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return false, "Server returned an invalid number of answers"
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end
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if(bit.band(FLAGS, 0x8000) == 0) then
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return false, "Server's flags didn't indicate a response"
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end
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if(bit.band(FLAGS, 0x0007) ~= 0) then
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return false, string.format("Server returned a NetBIOS error: 0x%02x", bit.band(FLAGS, 0x0007))
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end
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-- Sanity check the result (has to have the same TRN_ID, 1 answer, and proper flags)
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if(TRN_ID ~= 0x1337) then
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return false, string.format("Invalid transaction ID returned: 0x%04x", TRN_ID)
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end
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if(ANCOUNT ~= 1) then
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return false, "Server returned an invalid number of answers"
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end
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if(bit.band(FLAGS, 0x8000) == 0) then
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return false, "Server's flags didn't indicate a response"
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end
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if(bit.band(FLAGS, 0x0007) ~= 0) then
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return false, string.format("Server returned a NetBIOS error: 0x%02x", bit.band(FLAGS, 0x0007))
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end
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-- Start parsing the answer field
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pos, rr_name, rr_type, rr_class, rr_ttl = bin.unpack(">zSSI", result, pos)
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-- Start parsing the answer field
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pos, rr_name, rr_type, rr_class, rr_ttl = bin.unpack(">zSSI", result, pos)
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-- More sanity checks
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if(rr_name ~= encoded_name) then
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return false, "Server returned incorrect name"
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end
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if(rr_class ~= 0x0001) then
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return false, "Server returned incorrect class"
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end
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if(rr_type ~= 0x0021) then
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return false, "Server returned incorrect query type"
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end
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-- More sanity checks
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if(rr_name ~= encoded_name) then
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return false, "Server returned incorrect name"
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end
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if(rr_class ~= 0x0001) then
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return false, "Server returned incorrect class"
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end
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if(rr_type ~= 0x0021) then
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return false, "Server returned incorrect query type"
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end
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pos, rrlength, name_count = bin.unpack(">SC", result, pos)
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pos, rrlength, name_count = bin.unpack(">SC", result, pos)
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||||
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local names = {}
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for i = 1, name_count do
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local name, suffix, flags
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||||
local names = {}
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||||
for i = 1, name_count do
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||||
local name, suffix, flags
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||||
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||||
-- Instead of reading the 16-byte name and pulling off the suffix,
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||||
-- we read the first 15 bytes and then the 1-byte suffix.
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pos, name, suffix, flags = bin.unpack(">A15CS", result, pos)
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name = string.gsub(name, "[ ]*$", "")
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-- Instead of reading the 16-byte name and pulling off the suffix,
|
||||
-- we read the first 15 bytes and then the 1-byte suffix.
|
||||
pos, name, suffix, flags = bin.unpack(">A15CS", result, pos)
|
||||
name = string.gsub(name, "[ ]*$", "")
|
||||
|
||||
names[i] = {}
|
||||
names[i]['name'] = name
|
||||
names[i]['suffix'] = suffix
|
||||
names[i]['flags'] = flags
|
||||
names[i] = {}
|
||||
names[i]['name'] = name
|
||||
names[i]['suffix'] = suffix
|
||||
names[i]['flags'] = flags
|
||||
|
||||
-- Decrement the length
|
||||
rrlength = rrlength - 18
|
||||
end
|
||||
-- Decrement the length
|
||||
rrlength = rrlength - 18
|
||||
end
|
||||
|
||||
if(rrlength > 0) then
|
||||
rrlength = rrlength - 1
|
||||
end
|
||||
pos, statistics = bin.unpack(string.format(">A%d", rrlength), result, pos)
|
||||
if(rrlength > 0) then
|
||||
rrlength = rrlength - 1
|
||||
end
|
||||
pos, statistics = bin.unpack(string.format(">A%d", rrlength), result, pos)
|
||||
|
||||
-- Put it in the registry, in case anybody else needs it
|
||||
reg["nbstat_names"] = names
|
||||
reg["nbstat_statistics"] = statistics
|
||||
-- Put it in the registry, in case anybody else needs it
|
||||
reg["nbstat_names"] = names
|
||||
reg["nbstat_statistics"] = statistics
|
||||
|
||||
return true, names, statistics
|
||||
return true, names, statistics
|
||||
|
||||
else
|
||||
return false, "Name query failed: " .. result
|
||||
end
|
||||
else
|
||||
return false, "Name query failed: " .. result
|
||||
end
|
||||
end
|
||||
|
||||
function nbquery(host, nbname, options)
|
||||
-- override any options or set the default values
|
||||
local options = options or {}
|
||||
options.port = options.port or 137
|
||||
options.retPkt = options.retPkt or true
|
||||
options.dtype = options.dtype or types.NB
|
||||
options.host = host.ip
|
||||
options.flags = options.flags or ( options.multiple and 0x0110 )
|
||||
options.id = math.random(0xFFFF)
|
||||
-- override any options or set the default values
|
||||
local options = options or {}
|
||||
options.port = options.port or 137
|
||||
options.retPkt = options.retPkt or true
|
||||
options.dtype = options.dtype or types.NB
|
||||
options.host = host.ip
|
||||
options.flags = options.flags or ( options.multiple and 0x0110 )
|
||||
options.id = math.random(0xFFFF)
|
||||
|
||||
-- encode and chop off the leading byte, as the dns library takes care of
|
||||
-- specifying the length
|
||||
local encoded_name = name_encode(nbname):sub(2)
|
||||
-- encode and chop off the leading byte, as the dns library takes care of
|
||||
-- specifying the length
|
||||
local encoded_name = name_encode(nbname):sub(2)
|
||||
|
||||
local status, response = dns.query( encoded_name, options )
|
||||
if ( not(status) ) then return false, "ERROR: nbquery failed" end
|
||||
local status, response = dns.query( encoded_name, options )
|
||||
if ( not(status) ) then return false, "ERROR: nbquery failed" end
|
||||
|
||||
local results = {}
|
||||
-- discard any additional responses
|
||||
if ( options.multiple and #response > 0 ) then
|
||||
for _, resp in ipairs(response) do
|
||||
assert( options.id == resp.output.id, "Received packet with invalid transaction ID" )
|
||||
if ( not(resp.output.answers) or #resp.output.answers < 1 ) then
|
||||
return false, "ERROR: Response contained no answers"
|
||||
end
|
||||
local dname = string.char(#resp.output.answers[1].dname) .. resp.output.answers[1].dname
|
||||
table.insert( results, { peer = resp.peer, name = name_decode(dname) } )
|
||||
end
|
||||
return true, results
|
||||
else
|
||||
local dname = string.char(#response.answers[1].dname) .. response.answers[1].dname
|
||||
return true, { { peer = host.ip, name = name_decode(dname) } }
|
||||
end
|
||||
local results = {}
|
||||
-- discard any additional responses
|
||||
if ( options.multiple and #response > 0 ) then
|
||||
for _, resp in ipairs(response) do
|
||||
assert( options.id == resp.output.id, "Received packet with invalid transaction ID" )
|
||||
if ( not(resp.output.answers) or #resp.output.answers < 1 ) then
|
||||
return false, "ERROR: Response contained no answers"
|
||||
end
|
||||
local dname = string.char(#resp.output.answers[1].dname) .. resp.output.answers[1].dname
|
||||
table.insert( results, { peer = resp.peer, name = name_decode(dname) } )
|
||||
end
|
||||
return true, results
|
||||
else
|
||||
local dname = string.char(#response.answers[1].dname) .. response.answers[1].dname
|
||||
return true, { { peer = host.ip, name = name_decode(dname) } }
|
||||
end
|
||||
end
|
||||
|
||||
---Convert the 16-bit flags field to a string.
|
||||
--@param flags The 16-bit flags field
|
||||
--@return A string representing the flags
|
||||
function flags_to_string(flags)
|
||||
local result = ""
|
||||
local result = ""
|
||||
|
||||
if(bit.band(flags, 0x8000) ~= 0) then
|
||||
result = result .. "<group>"
|
||||
else
|
||||
result = result .. "<unique>"
|
||||
end
|
||||
if(bit.band(flags, 0x8000) ~= 0) then
|
||||
result = result .. "<group>"
|
||||
else
|
||||
result = result .. "<unique>"
|
||||
end
|
||||
|
||||
if(bit.band(flags, 0x1000) ~= 0) then
|
||||
result = result .. "<deregister>"
|
||||
end
|
||||
if(bit.band(flags, 0x1000) ~= 0) then
|
||||
result = result .. "<deregister>"
|
||||
end
|
||||
|
||||
if(bit.band(flags, 0x0800) ~= 0) then
|
||||
result = result .. "<conflict>"
|
||||
end
|
||||
if(bit.band(flags, 0x0800) ~= 0) then
|
||||
result = result .. "<conflict>"
|
||||
end
|
||||
|
||||
if(bit.band(flags, 0x0400) ~= 0) then
|
||||
result = result .. "<active>"
|
||||
end
|
||||
if(bit.band(flags, 0x0400) ~= 0) then
|
||||
result = result .. "<active>"
|
||||
end
|
||||
|
||||
if(bit.band(flags, 0x0200) ~= 0) then
|
||||
result = result .. "<permanent>"
|
||||
end
|
||||
if(bit.band(flags, 0x0200) ~= 0) then
|
||||
result = result .. "<permanent>"
|
||||
end
|
||||
|
||||
return result
|
||||
return result
|
||||
end
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user