[PATCH] mini port scanner for busybox

[Tito]

Hi,
this patch adds a very simple port scanner based on connect() to busybox.
I developed it for fun and to improve my skills.
Include it if you like it. Critics, hints and improvements are welcome.
It is turned off by default. Bloat-o-meter says:

scripts/bloat-o-meter busybox_old busybox_unstripped
function                                             old     new   delta
pscan_main                                             -     472    +472
.rodata                                           122515  122707    +192
packed_usage                                       22284   22334     +50
my_gettimeofday                                        -      35     +35
applets                                             3084    3096     +12
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/0 up/down: 761/0)             Total: 761 bytes

BTW: the increase in .rodata seems very big (maybe too big) to me, but i'm not a guru in this things....

Output looks like:

root at localhost:~/Desktop/busybox.orig# ./busybox pscan www.busybox.net
Scanning www.busybox.net ports 1 to 1024
 Port   Proto   State   Service
   22   tcp     open    ssh
   25   tcp     open    smtp
   53   tcp     open    domain
   80   tcp     open    www
  443   tcp     open    https
  873   tcp     open    rsync
0 stealth, 1018 closed, 6 open ports


Have fun,
Ciao
Tito


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