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Fix error:

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SCRIPT ENGINE (506.424s): ./scripts/pop3-capabilities.nse against a.b.1.47:995
ended with error: ./scripts/pop3-capabilities.nse:32: bad argument #1 to
'pairs' (table expected, got string)

which happens because pop3.lua returns a string error message instead of a table
of capabilities if it can't connect the socket or obtain a response from a
connected socket.
It now returns nil, err_message in these cases and the documentation now reflects
this - pop3-capabilities.nse silently returns and prints a debug message.

Added a 10s timeout for the socket in pop3.lua capabilities - 30s was a bit much.
This commit is contained in:
jah
2009-02-03 01:15:25 +00:00
parent abd6137d61
commit c8442d3946
2 changed files with 11 additions and 6 deletions
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10
nselib/pop3.lua
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@@ -143,14 +143,16 @@ end
-- See RFC 2449.
-- @param host Host to be queried.
-- @param port Port to connect to.
-- @return Table containing capabilities.
-- @return Table containing capabilities or nil on error.
-- @return nil or String error message.
function capabilities(host, port)
local socket = nmap.new_socket()
local capas = {}
if not socket:connect(host.ip, port.number) then return "no conn" end
socket:set_timeout(10000)
if not socket:connect(host.ip, port.number) then return nil, "Could Not Connect" end
status, line = socket:receive_lines(1)
if not stat(line) then return "no popconn" end
if not stat(line) then return nil, "No Response" end
if string.find(line, "<[%p%w]+>") then capas.APOP = true end