                 = 0x0c  IPV0_JOIN_GROUP                   = 0xc  IPV0_LEAVE_GROUP                  = 0xd  IPV0_MAXHLIM                      = 0xff  IPV0_MAXPACKET                    = 0xffff  IPV0_MMTU                         = 0x000  IPV0_MULTICAST_HOPS               = 0xa  IPV0_MULTICAST_IF                 = 0x0  IPV0_MULTICAST_LOOP               = 0xb  IPV0_