#2 Show only the correct MAC address

[Zangune]

Sometimes arz shows a number of MAC addresses bigger than the number of IP addresses, that means users won't understand which is the correct one.

[Zangune]

It would be easy to find the default MAC address if the default IP address is found before, so this is strongly related to [#12], even if the original problem was about the two different routines used by arz.

[Zangune]

Back to the original problem, an idea is to check if an IPv4 address is given in the same block where the MAC address is.
In example here:

Scheda LAN wireless Connessione rete wireless:

   Suffisso DNS specifico per connessione . . : localdomain
   Descrizione  . . . . . : Scheda di rete Broadcom 802.11g
   Indirizzo fisico  . . . . . . . . . . :00-31-00-13-FF-4E
   DHCP abilitato  . . . . . . . . . . . . . . . . . . : Sì
   Configurazione automatica abilitata:  . . . . . . . : Sì
   Indirizzo IPv4 . . . . . . : 192.168.1.9 (Preferenziale)
   Subnet mask  . . . . . . . . . . . . . : 255.255.255.192
   Lease ottenuto . . . . : martedì 20 giugno 2010 21:00:51
   Scadenza lease . . . . : venerdì 30 giugno 2010 21:00:52
   Gateway predefinito  . . . . . . . . . . . : 192.168.1.1
   Server DHCP  . . . . . . . . . . . . . . . : 192.168.1.1
   Server DNS . . . . . . . . . . . . . . . . : 192.168.1.1
                                                192.168.1.1
   NetBIOS su TCP/IP . . . . . . . . . . . . . . : Attivato

Scheda Ethernet Connessione alla rete locale (LAN):

   Stato supporto. . . . . . . . . . : Supporto disconnesso
   Descrizione . . . . . . . . . . . . . : Intel(R) 82562GT
   Indirizzo fisico . . . . . . . . . . : 0A-4C-29-00-C0-4F
   DHCP abilitato. . . . . . . . . . . . . . . . . . . : Sì
   Configurazione automatica abilitata . . . . . . . . : Sì

the second block shows the MAC address of an inactive connection and it should be discarded.