Hi,
I am currently developing IPv4 multicasting application and I need to set socket option IP_ADD_MEMBERSHIP. The problem is I can't find this constant defined in any module (I did grep on /usr/lib/perl). So how do I import this and other IP related constants? I can still look at /usr/include/netinet/in.h and make my own constants but I was hoping perl has some way. I can't use 3rd party modules, just basic perl.