支持PIM-SM组播路由,支持组播 路由表,稍微修改即可构建组播路由器-support PIM-SM Multicast routing, multicast support multicast routing table, can be modified slightly Construction multicast routers
该系统是linux下的socket编程,实现随机生成两个数,返回相加结果和相减的结果。-The system is socket programming under linux, realize the two randomly generated number, to return the sum of the results and the results of subtraction.