[NSE] Verbosity/debugging info for scripts

[Kris Katterjohn <katterjohn () gmail com>]

Hey everyone!

As far as I know, there is no way for scripts to get Nmap's verbosity or 
debugging values (o.verbose and o.debugging).  I have attached a patch 
to give this info to scripts and a test script to illustrate it's usage.

nmap.verbosity() gives you the o.verbose value and nmap.debugging() 
gives you the o.debugging value.

Everything seems to work fine for me, all as expected.

Please give it a try, and let me now what you think!  Any suggestions on 
better names than "nmap.verbosity()" and "nmap.debugging()" are welcome, 
but these just made the most sense to me.

Thanks,
Kris Katterjohn

Index: nse_nmaplib.cc
===================================================================
--- nse_nmaplib.cc      (revision 5833)
+++ nse_nmaplib.cc      (working copy)
@@ -36,6 +36,8 @@
 static int l_get_port_state(lua_State* l, Target* target, Port* port);
 static int l_set_port_state(lua_State* l, Target* target, Port* port);
 static int l_set_port_version(lua_State* l, Target* target, Port* port);
+static int l_get_verbosity(lua_State *);
+static int l_get_debugging(lua_State *);
 
 int l_clock_ms(lua_State* l);
 
@@ -53,6 +55,8 @@
                {"clock_ms", l_clock_ms},
                {"print_debug_unformatted", l_print_debug_unformatted},
                {"new_try", l_exc_newtry},
+               {"verbosity", l_get_verbosity},
+               {"debugging", l_get_debugging},
                {NULL, NULL} 
        };
 
@@ -486,3 +490,15 @@
        return 1;
 }
 
+static int l_get_verbosity(lua_State *l)
+{
+       lua_pushnumber(l, o.verbose);
+       return 1;
+}
+
+static int l_get_debugging(lua_State *l)
+{
+       lua_pushnumber(l, o.debugging);
+       return 1;
+}
+

id = "test"

author = "me"

description = "testing"

categories = {"safe"}

require "stdnse"

portrule = function(host, port)
        return true
end

action = function(host, port)
        local v = nmap.verbosity()
        local d = nmap.debugging()

        stdnse.print_debug("Verbosity: " .. v)
        stdnse.print_debug("Debugging: " .. d)

        if v > 1 then
                stdnse.print_debug("v > 1 works as expected")
        end

        if d > 5 then
                stdnse.print_debug("d > 5 works as expected")
        end

        return
end


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