Hi,

in the code of "struct ipt_ip" there is a mask value for the interface. 
I can understand mask for an ip address but can not understand mask 
value for an interface. For example what can be the mask for eth0?

36         char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
37         unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];

Can anyone write me some about "iniface_mask[IFNAMSIZ]" ?

thanks,
Ozgur AKAN