While I was looking for match info in iptables.c I found 
IPT_MATCH_ITERATE. In ip_tables.h IPT_MATCH_ITERATE is defined but there 
are two lines which I can  not understand!

#define IPT_MATCH_ITERATE(e, fn, args...)
....
....
    __ret = fn(__match , ## args);

Can you please tell me abour "args..." and "## args" notation?

thanks,

-- 
Ozgur Akan